Title of Invention	MOTORCYCLE
Abstract	The motorcycle includes: a steering head for supporting a steering shaft capable of rotating; a headlight having a bulb positioned ahead of the steering head; and lead wires connected to switch units and an instrument unit disposed above the steering head. The lead wires are provided to extend in a downward direction from the switch units and the instrument unit on both lateral sides of the bulb and then in a rearward direction.

Title of Invention

MOTORCYCLE

Abstract

The motorcycle includes: a steering head for supporting a steering shaft capable of rotating; a headlight having a bulb positioned ahead of the steering head; and lead wires connected to switch units and an instrument unit disposed above the steering head. The lead wires are provided to extend in a downward direction from the switch units and the instrument unit on both lateral sides of the bulb and then in a rearward direction.

Full Text	MOTORCYCLE This application claims priority from Japanese Patent Application No. 2007-341396 filed on December 28, 2007. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorcycle in which lead wires connected to electrical components are provided behind a headlight. 2. Description of the Related Art There has been proposed a motorcycle having a headlight disposed ahead of a steering head that supports a steering shaft capable of rotating. Generally, in this kind of motorcycle, a housing that covers the headlight from behind is provided for housing collected ends of lead wires connected to electrical components disposed above the steering head (for example, a speed meter, a switch provided on lateral sides of a handlebar, and the like) . Moreover, these lead wires are coupled to lead wires connected to a battery, a relay and the like disposed at a rear portion of a vehicle body in the housing. Also, in a motorcycle disclosed in JP-A-6-115473, a box separated from a headlight is disposed behind the headlight, and in this box, lead wires connected to electrical components disposed above a steering head are coupled to lead wires connected to electrical components disposed at a rear portion of a vehicle body. However, in the related motorcycle as described above, in order to secure a space for the housing or the box that houses the lead wires, it is required to dispose the headlight away in front of the steering head. This results in the headlight being disposed away from its rotational center by operation of the handlebar, that is, the steering shaft. Thus, the force required for the steering increases compared to a case where the headlight is disposed adjacent to the steering shaft. SUMMARY OF THE INVENTION The present invention is made considering the above problem, and an object of the present invention is to provide a motorcycle which has lead wires provided behind a headlight and in which the headlight can be disposed adjacent to a steering head. In order to solve the above problem, a motorcycle according to the present invention includes: a steering head for supproting a steering shaft capable of rotating; a headlight having a bulb positioned ahead of the steering head; and lead wires connected to a plurality of electrical components disposed above the steering head. In addition, the lead wires are provided to extend in a downward direction on both lateral sides of the bulb from the plurality of electrical components and then extend in a rearward direction. According to the invention, the headlight can be disposed adjacent to the steering head compared to a case where the lead wires are housed in the housing or the box disposed behind the headlight, so that the operability of the handlebar can be improved. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a motorcycle according to an embodiment of the present invention; FIG. 2 is a front view of a portion on which a headlight is mounted in the motorcycle; FIG. 3 is a front view of an upper portion of the motorcycle in a state that the headlight is removed; FIG. 4 is a side view of a front portion of the motorcycle in a state that the headlight is removed; FIG. 5 is a side view of the headlight; FIG. 6 is a side view of the headlight in which its side portion is partially cut off to show a bulb holding portion positioned in the headlight; FIG. 7 is a rear view of the headlight; FIG. 8 is a front view of a harness stay; FIG. 9 is a front view of the harness stay in which lead wires supported by the harness stay is shown in addition to the harness stay; FIG. 10 is a side view of the harness stay; and FIG. 11 is a side view of the harness stay in which lead wires are shown in addition to the harness stay. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be explained with reference to the drawings. FIG, 1 is a side view of a motorcycle 1 according to the embodiment of the present invention, and FIG. 2 is a front view of a portion where a headlight 30 is attached in the motorcycle 1. Moreover, FIG, 3 is a front view of an upper portion of the motorcycle 1 in a state that the headlight 30 is removed, and FIG, 4 is a side view of a front portion of the motorcycle 1 in a state that the headlight 30 is removed. As shown in FIG, 1 or 3, the motorcycle 1 includes an engine 2, a front wheel 3, a rear wheel 4, a vehicle body frame 20, the headlight 30, an instrument unit 41, a right switch unit 42, a left switch unit 43, and a harness stay 60. The vehicle body frame 20 includes a steering head 21, a main tube 22 and a down tube 23. As shown in FIG. 1, the steering head 21 is connected to a front end of the main tube 22 and an upper end (front end) of the down tube 23. The main tube 22 extends in a rearward direction from the steering head 21 and suspends the engine 2 disposed below the main tube 22. The down tube 23 extends obliquely downwardly from the steering head 21 and supports the engine 2 positioned behind the down tube 23. A gusset 28 substantially in the shape of triangle is provided between the front end of the main tube 22 and the upper end of the down tube 23 for reinforcement of the main tube 22 and the down tube 23. The engine 2 has therein a clutch 2a for transmitting or cutting off the driving force of the engine 2. Moreover, a throttle body 14 for controlling the amount of air to be provided to the engine 2 is connected to the engine 2. The rear wheel 4 is disposed behind the engine 2, and the driving force output from the engine 2 is transmitted to the rear wheel 4 through a chain, a belt, etc. which are unillustrated. As shown in FIG. 4, the steering head 21 supports a steering shaft 5 rotatably inserted through the steering head 21. An upper end and a lower end of the steering shaft 5 are fixed to an upper bracket 7 and an under bracket 6 respectively. A handle holder 7a is provided on an upper surface of the upper bracket 7. The handle holder 7a is provided so that it stands on the upper surface of the upper bracket 7, and supports a handlebar 9 disposed above the steering head 21. As shown in FIG. 3, grips 9R and 9L, and levers 12R and 12L are provided on lateral ends of the handlebar 9. The lever 12R is positioned ahead of the grip 9R, and the lever 12L is positioned ahead of the grip 9L. For example, the lever 12R is a clutch lever, which is connected to the clutch 2a positioned behind the handlebar 9 (refer to FIG. 1) through a wire 77. For example, the lever 12L is a front wheel brake lever, which actuates a front wheel brake 13 in accordance with an operation of a rider (refer to FIG. 1) . In this embodiment, the front wheel brake 13 is a hydraulic brake, and the lever 12L is connected to the front wheel brake 13 through an oil hose 81 for transmitting the motion of the lever 12L by hydraulic pressure. Front suspensions 8 and 8 are supported by the under bracket 6 and the upper bracket 7. More specifically, the front suspensions 8 and 8, constituted by a pair of right and left suspensions, have upper portions to be inserted through right and left ends of the under bracket 6 and the upper bracket 7, and the front suspensions 8, 8 are supported by these right and left ends. The front wheel 3 is disposed between the front suspensions 8 and 8, and the lower ends 8a and 8a of the suspensions 8 and 8 support the axle of the front wheel 3 (refer to FIG. 1). The handlebar 9 rotates to the right and left about the steering shaft 5 together with the upper bracket 7, the under bracket 6, the front suspensions 8 and 8, and the front wheel 3 (refer to FIG. 1 or 4). As shown in FIG. 3, a plurality of electrical components are disposed above the steering head 21. More specifically, the right switch unit 42, the left switch unit 43 and the instrument unit 41 are disposed above the steering head 21. The right switch unit 42 is disposed on the right side of the handlebar 9 and includes, for example, a starter switch for operating a starter motor that actuates the engine 2, and a switch for turning on/off the headlight 30. The left switch unit 43 is disposed on the left side of the handlebar 9 and includes a switch for changing the illuminating direction of the headlight 30 vertically, a switch for switching on/off flashers 44, 44 and the like (refer to FIG. 2). As shown in FIG. 3 or 4, the instrument unit 41 includes a speed meter for indicating a vehicle speed and a tachometer for indicating the engine speed. In a front view of a vehicle body, the instrument unit 41 is interposed between the right switch unit 42 and the left switch unit 43 and disposed in front of the middle portion of the handlebar 9. Moreover, in a side view of a vehicle, the instrument unit 41 is positioned obliquely upward with respect to the steering head 21. As shown in FIG. 1 or 2, a plurality of electrical components is also disposed behind the right switch unit 42, the left switch unit 43 and the instrument unit 41. More specifically, a battery 49 that stores the electric power supplied to the electrical components is disposed below a front end of a seat 11 to be seated by the rider. Moreover, relay units 46 and 48 are disposed below the seat 11 for switching on/off the electrical power supply to the electrical components such as the headlight 30 and the flashers 44 and 44. A harness (the rear lead wire) 79 including lead wires connected to the relay units 46 and 48 is provided to extend in the forward direction of the vehicle body along the main tube 22. A front end of the harness 79 is positioned on the lateral side of the gusset 28 (refer to Fig. 4). FIGs. 5 and 6 are side views of the headlight 30. In FIG. 6, a side portion 33 of the headlight 30 is partially cut off to show its inner portion. FIG. 7 is a rear view of the headlight 30. As shown in FIG. 6, the headlight 30 is disposed ahead of the steering head 21. The headlight 30 includes a bulb 31 positioned ahead of the steering head 21 and a reflector 32 in the shape of a forwardly opening bowl in which the bulb 31 is disposed. The bulb 31 illuminates by the electric power supplied from the battery 49 through the relay unit 46, and the reflector 32 reflects the light from the bulb 31 in the forward direction. The bulb 31 is inserted in a rear end of the reflector 32 (a bottom of the bowl-shaped reflector 32) where a bulb holding portion 32e for holding a basal portion of the bulb 31 is provided. As shown in FIG. 5 or 7, the headlight 30 includes the side portions 33 and 33 and an upper portion 34. The side portions 33 and 33 are positioned on the lateral sides of the reflector 32 to cover the reflector 32 from the lateral sides. The upper portion 34 is positioned on an upper portion of the reflector 32 to cover the reflector 32 from the upper side. A mounting portion 33a is provided on an upper portion of the side portion 33, a mounting hole 33b is formed below the mounting portion 33a, and a mounting portion 33c is provided below the mounting hole 33b. The flashers 44 and 44 are disposed on both lateral sides of the headlight 30 (refer to FIG. 2), and a basal portion of the flasher 44 is inserted in the mounting hole 33b. This arrangement allows the flasher 44 to be supported on the lateral side of the headlight 30. Moreover, mounting potions 32b and 32b are formed on the reflector 32. The mounting portion 33c of the side portion 33 is fixed to the mounting portion 32b by a bolt 36. Moreover, the mounting portions 32a and 32a are formed on the reflector 32. The mounting portion 33a of the side portion 33 is fixed to the harness stay 60 by a bolt 37 together with the mounting portion 32a. The harness stay 60 will be described later in detail. As shown in FIG. 3, lead wires are connected to each of the plural electrical components disposed above the steering head 21. More specifically, a switch lead wire 72 is connected to the right switch unit 42. The switch lead wire 72 includes a plurality of lead wires connected to various kinds of switches provided on the right switch unit 42. A switch lead wire 73 is connected to the left switch unit 43. The switch lead wire 73 includes lead wires connected to various kinds of switches provided on the left switch unit 43. Moreover, an instrument lead wire 71 includes lead wires connected to instruments (such as the speed meter and the tachometer) provided in the instrument unit 41, and is connected to a rear surface of the instrument unit 41. A connecting position of the instrument lead wire 71 is on the lateral side of the steering head 21 (the left side in the embodiment) . Additionally, while positions on which the lead wires are provided and the support configurations of the lead wires are explained with an example of the switch lead wires 72 and 73 and the instrument lead wire 71 in this embodiment, the kind of the lead wires are not limited to these. For example, the levers 12L and 12R may include switches to be switched on/off in accordance with the operation of the levers 12L and 12R, and the lead wires may be connected to these switches. FIGs. 8 and 9 are front views of the harness stay 60 for supporting the above lead wires 71, 72 and 73. FIGs. 10 and 11 are side views of the harness stay 60. In FIGs. 9 and 11, in addition to the harness stay 60, a plurality of lead wires connected to the electrical components are also shown. The lead wires 71, 72 and 73 are provided to extend in a downward direction on both lateral sides of the bulb 31 provided to the headlight 30, and are bent in the rearward direction below the bulb 31. More specifically, as shown in FIG. 3 or 9, the switch lead wire 72 extends slightly to the center in the width direction of the vehicle from the right switch unit 42 and curves in the downward direction in front of the handlebar 9. Then, the switch lead wire 72 extends substantially straight in the downward direction not only on the right side of the bulb 31 but also on the inner side (the center side of the width direction of the vehicle) of the right front suspension 8 and the side portion 33 of the headlight 30 (refer to FIGs. 5 and 6) to be positioned ahead of the under bracket 6. In a similar manner, the switch lead wire 73 extends slightly to the center in the width direction of the vehicle from the left switch unit 43 and curves in the downward direction in front of the handlebar 9. Then, the switch lead wire 73 extends substantially straight in the downward direction not only on the left side of the bulb 31 but also on the inner side of the left front suspension 8 and the side portion 33 of the headlight 30 to be positioned ahead of the under bracket 6. The instrument lead wire 71 extends in the downward direction from the connecting position with the instrument unit 41 on the left side of the bulb 31 and curves to the center in the width direction of the vehicle. The instrument lead wire 71, the lead wire 75 connected to the bulb 31, and the lead wires 74 and 74 connected to the flashers 44 and 44 are bundled together below the bulb 31. A harness 70 is constituted by the instrument lead wire 71 and the lead wires 74, 74 and 75. The switch lead wire 72, the switch lead wire 73, and the harness 70, which extend in the downward direction in the above manner, are bent in the rearward direction after reaching ahead of the under bracket 6 to extend downward in a position below the under bracket 6 and the steering head 21 (refer to FIG. 4). As shown in FIG. 4, the harness 70 and lead wires 72 and 73 are connected to the harness 79 behind the steering head 21. More specifically, the harness 70 and lead wires 72 and 73 have rear ends each provided with couplers 70a, 72a and 73a respectively. The couplers 70a, 72a and 73a are positioned behind the steering head 21 and covered with a cover 82 fixed to the gusset 28. Moreover, the couplers 70a, 72a and 73a are connected to couplers 79a, 79a and 79a provided on a front end of the harness 79. The harness 79 is provided to extend in the rearward direction on the opposite side of the couplers 70a, 72a and 73a across the main tube 22. As shown in FIG. 3, a plurality of wires 76 and 77 (two wires in the embodiment) are connected to the right side of the handlebar 9. For example, the wire 76 is a choke wire, which has a front end connected to a choke lever 45 provided adjacent to the right switch unit 42 on the handlebar 9. The throttle body 14 is provided with a choke (not shown) for regulating the amount of air supplied to the engine 2, and a rear end of the wire 76 is connected to the choke. As described above, for example, the wire 77 is a clutch wire, which has a front end connected to the lever 12R and a rear end connected to the clutch 2a. As shown in FIG. 9, the wires 76 and 77 extend slightly to the center in the width direction of the vehicle from respective connecting positions with the choke lever 45 and the lever 12R, are bent in the downward direction, and extend downward with the switch lead wire 72. Thereafter, the wires 76 and 77 are bent in the rearward direction between the steering head 21 and the right side of front suspension 8 and extend in the rearward direction along the gusset 28 (refer to FIG. 3 or 4) . As shown in FIG. 3, a wire 78 and the oil hose 81 are connected to the left side of the handlebar 9. For example, the wire 78 is a throttle wire, which has a front end connected to a throttle housed in the grip 9L and a rear end connected to the throttle body 14 positioned behind the handlebar 9. Similarly to the wires 76 and 77, the wire 78 is provided to extend to the center in the width direction of the vehicle from a connecting position with the grip 9L and then to extend downward with the switch lead wire 73 (refer to FIG. 9). Thereafter, the wire 78 is bent in the rearward direction between the steering head 21 and the left front suspension 8 and extends in the rearward direction along the gusset 28. As described above, the front wheel brake 13 is a hydraulic brake, and an upper end of the oil hose 81 is connected to a cylinder 9a provided on a basal portion of the lever 12L. The oil hose 81 extends to the center in the width direction of the vehicle from a connecting position with the cylinder 9a, and extends downward with the switch lead wire 73 (refer to FIG. 9). Then, the oil hose 81 extends in the downward direction, passes in front of the under bracket 6 (refer to FIG. 3), and is connected to the front wheel brake 13 (refer to FIG. 1). The harness stay 60 is a member for holding the switch lead wires 72, 73 and the instrument lead wire 71 capable of extending in the downward direction on lateral sides of the bulb 31, and supporting the headlight 30 ahead of the steering head 21. Hereinafter, the harness stay 60 will be explained in detail. As shown in FIG. 8 or 10, the harness stay 60 includes a right and left pair of frame portions 61 and 61 extending vertically, an upper plate 62, and a lower plate 63 disposed across the frame portions 61 and 61 behind the headlight 30. The harness stay 60 is supported by the upper bracket 7 and the under bracket 6. More specifically, as shown in FIG. 10, inserting portions 61a and 61a extending upward are provided on upper portions of the frame portions 61 and 61. Holes are formed in a bottom surface of the upper bracket 7, and the inserting portions 61a and 61a are inserted in the holes of the upper bracket 7. Meanwhile, the lower plate 63 is fixed to a front surface of the under bracket 6 by a bolt (not shown) in a state that the inserting portions 61a and 61a are inserted in the holes of the upper bracket 7 from the lower side. The harness stay 60 supports the headlight 30 in addition to the lead wires 71, 72, and 73. More specifically, as shown in FIG. 8, flared portions 61c and 61c swelling to the outside in the width direction of the vehicle are provided on a halfway position of the frame portions 61 and 61. Moreover, brackets 61b and 61b projecting forward are provided on the flared portions 61c and 61c (refer to FIG. 10) . The bracket 61b is positioned on the inner side (the center side of the width direction of the vehicle) of the side portion 33 of the headlight 30, and fixed to the mounting portions 32a and 33a provided on the headlight 30 (refer to FIG. 7). Incidentally, the headlight 30 is configured so that its posture with respect to the harness stay 60 can be changed. More specifically, as shown in FIG. 8 or 10, a bracket 61d is provided below the bracket 61b on the frame portion 61. A bracket 32d is provided on a rear surface of the headlight 30 (refer to FIG. 7), and the bracket 32d is fixed to the bracket 61d by a bolt 69. A bolt attaching hole 32f formed in the bracket 32d is an elongated hole in the forward and rearward direction, and the bracket 32d is relatively movable with respect to the bracket 61d. This allows the headlight 30 to move vertically setting the bolt that fixes the mounting portion 32a to the bracket 61b as a supporting point. Moreover, a plurality of clamps is provided on the frame portions 61 and 61. Each clamp supports the lead wires 71, 72 and 73 capable of extending vertically on both lateral sides of the bulb 31. More specifically, as shown in FIG. 8 or 10, a right and left pair of first clamps 64 and 64 and a right and left pair of second clamps 65 and 65 is provided on the frame portions 61 and 61. Moreover, the frame portions 61 and 61 are provided with a third clamp 66 positioned below the second clamps 65 and 65 and disposed across the right and left frame portions 61 and 61, and a fourth clamp 67 disposed below the third clamp 66. The first clamps 64 and 64 extend to the lateral sides from the frame portions 61 and 61 above the bulb 31. The first clamps 64 and 64 hold the switch lead wires 72 and 73 provided on the lateral sides of the frame portions 61 and 61 (refer to FIGs. 9 and 11). Additionally, the first clamps 64 and 64 are wire members that are bent at several portions to hold the switch lead wires 72 and 73. The second clamps 65 and 65 are disposed below the first clamps 64 and 64 and closer to the center in the width direction of the vehicle than the first clamps 64 and 64. The second clamps 65 and 65 extend in the rearward direction from the frame portions 61 and 61. The left second clamp 65 holds the instrument lead wire 71 as well as the switch lead wire 73 positioned behind the frame portion 61, and the right second clamp 65 holds the switch lead wire 72 positioned behind the frame portion 61. Additionally, the second clamps 65 and 65 are disposed below the bulb 31. The second clamps 65 and 65 are wire members that are bent at several portions to hold the switch lead wires 72 and 73 and the instrument lead wire 71. Holding by the first clamp 64 and the second clamp 65 enables the switch lead wires 72 and 73 to be provided substantially straight between the clamps 64 and 65. As shown in FIG. 9, the left first clamp 64 holds the oil hose 81 and the wire 78 in addition to the switch lead wire 73. This allows the oil hose 81 to be supported to extend in the downward direction on the left side of the bulb 31. The right first clamp 64 holds the wires 7 6 and 77 as well as the switch lead wire 72. The wires 76 and 77 are bent in the rearward direction between the first clamp 64 and the second clamp 65 (refer to FIG. 11) . Moreover, the left second clamp 65 holds the lead wire 74 connected to the left flasher 44 and the lead wire 75 connected to the bulb 31. The right second clamp 65 holds the lead wire 7 4 connected to the right flasher 44. The third clamp 66 is disposed below the second clamps 65 and 65 and positioned below the bulb 31. The third clamp 66 holds the instrument lead wire 71, the lead wire 74, and the lead wire 75 between the frame portions 61 and 61. Additionally, the third clamp 66 is a wire member that is bent at several portions to hold the instrument lead wire 71 and the lead wires 74 and 75. The fourth clamp 67 is positioned below the third clamp 66 to hold the harness 70 and the switch lead wires 72 and 73 not only ahead of but also below the under bracket 6 in order to bend the harness 70 and the switch lead wires 72 and 73 in the rearward direction. More specifically, as shown in FIG. 9 or 11, the fourth clamp 67 includes a front holding portion 67a and a rear holding portion 67b. The front holding portion 67a is positioned ahead of the under bracket 6 for supporting the switch lead wires 72 and 73 and the harness 70 at that position. The fourth clamp 67 is also positioned below the under bracket 6 for supporting the switch lead wires 72 and 73 and the harness 70 at that position. In this way, the switch lead wires 72 and 73 and the harness 70 are bent in the rearward direction since they are held not only ahead of but also below the under bracket 6. Thereafter, the switch lead wires 72 and 73 and the harness 70 extend in the rearward direction along the gusset 28 to be connected to the harness 79 by the couplers 72a, 73a and 70a adjacent to the gusset 28 as described above. Moreover, the harness stay 60 supports the instrument unit 41 since the upper plate 62 is fixed to a rear surface of the instrument unit 41 by a plurality of bolts 93. More specifically, as shown in FIG. 8, a plurality of mounting holes (three in the embodiment) 62a, 62a and 62a are formed on the edge of the upper plate 62. The mounting hole 62a is fixed to the rear surface of the instrument unit 41 via a cylindrical damper 92 whose lateral ends are flared like a flange (refer to FIG. 11) . In other words, the damper 92 is fitted on an inner side of the mounting hole 62a and the flange-shaped lateral ends of the damper 92 are interposed not only between the edge of the mounting hole 62a, and the rear surface of the instrument unit 41 but also between a head portion of the bolt 93 and a bottom surface of the upper plate 62. Then, the bolt 93 passes through the damper 92 fitted on the inner side of the mounting hole 62a and is fixed to the rear surface of the instrument unit 41. In the motorcycle 1 described above, each of the switch lead wires 72 and 73 and the instrument lead wire 71 is provided to extend in the downward direction from the switch units 42 and 43 and the instrument unit 41 respectively on both lateral sides of the bulb 31 and then in the rearward direction. This allows the headlight 30 to be disposed adjacent to the steering head 21 compared to a case where the lead wires are provided in the housing that covers the headlight 30 from behind. As a result, the force required for steering can be reduced, which improves the operability of the handlebar 9. Moreover, the motorcycle 1 includes the right switch unit 42 disposed on the right side of the handlebar 9, and the left switch unit 43 disposed on the left side of the handlebar 9. In addition, the switch lead wire 72 connected to the right switch unit 42 is provided to extend in the downward direction on the right side of the bulb 31, and the switch lead wire 73 connected to the left switch unit 43 is provided to extend in the downward direction on the left side of the bulb 31. This simplifies the installation route of the lead wires 72 and 73. Moreover, the motorcycle 1 includes the instrument unit 41 disposed between the right switch unit 42 and the left switch unit 43. In addition, the instrument lead wire 71 connected to the instrument unit 41 is supported together with the switch lead wire 73 connected to the left switch unit 43. This prevents the instrument lead wire 71 from swinging due to the rotation of the handlebar 9 to the right and left. Additionally, the instrument lead wire 71 may be bundled with the switch lead wire 72. Moreover, the motorcycle 1 includes the harness 79 that bundles the lead wires connected to the plurality of electrical components (the battery 49 and the relay units 46 and 48 in this embodiment) disposed behind the switch units 42 and 43 or the instrument unit 41 disposed above the steering head 21. The switch lead wires 72 and 73 and the instrument lead wire 71 are provided to extend in the downward direction on both lateral sides of the bulb 31 and then in the rearward direction. Then, they are connected to the lead wires included in the harness 79 by the couplers 72a, 73a and 70a behind the steering head 21. This allows the couplers 72a, 73a and 70a to be provided behind the steering head 21, which simplifies the installation of the lead wires 71, 72 and 73 around the steering head 21 and the headlight 30. Moreover, the couplers 72a, 73a and 70a are covered with the cover 82. This allows for the protection of the couplers 72a, 73a and 70a. Moreover, the motorcycle 1 includes the harness stay 60 having the right and left pair of frame portions 61 and 61 extending vertically behind the headlight 30, and the pair of first clamps 64 and 64 each provided on the pair of frame portions 61 and 61 respectively for supporting the lead wires 72 and 73 capable of extending vertically on both lateral sides of the bulb 31. This makes it possible to stably support the lead wires 72 and 73 provided on both lateral sides of the bulb 31. Moreover, the harness stay 60 includes the second clamps 65 and 65 for supporting the lead wires 71, 72 and 73 below and away from the first clamps 64 and 64. This makes it possible to support the lead wires 71, 72 and 73 provided on both lateral sides of the bulb 31 more stably. Moreover, in the motorcycle 1, the harness stay 60 not only holds the lead wires 71, 72 and 73 capable of extending on both lateral sides of the bulb 31 but also supports the headlight 30. Accordingly, the headlight 30 is also supported by the harness stay 60 while the lead wires 71, 72 and 73 are prevented from swinging due to the rotation of the handlebar 9 to the right and left. As a result, the increase in the number of components can be prevented. Moreover, the harness stay 60 includes the right and left pair of frame portions 61 and 61 extending vertically behind the headlight 30, and the brackets 61b and 61b each extending from the right and left pair of frame portions 61 and 61 respectively for supporting headlight 30. The right and left pair of frame portions 61 and 61 include, on a halfway position thereof, flared portions 61c and 61c swelling to the lateral side, and the brackets 61b and 61b are provided on the flared portions 61c and 61c. This allows for the stable support of the headlight 30 that is wider than an interval between the frame portions 61 and 61. Moreover, the motorcycle 1 includes the wires 76, 77 and 78 provided from the handlebar 9 disposed above the steering head 21 to be directed to the components behind the handlebar 9 (the clutch 2a, the throttle body 14, and the choke in the above description). The harness stay 60 holds the switch lead wires 72 and 73 in addition to the wires 76, 77 and 78. Accordingly, the wires 76, 77 and 78 are also supported by the harness stay 60 while the lead wires 72 and 73 and the wires 76, 77 and 78 are prevented from swinging due to the rotation of the handlebar 9 to the right and left. As a result, the increase in the number of components can be prevented. Moreover, the motorcycle 1 includes the oil hose 81 that extends downward from the handlebar 9 positioned above the steering head 21. In addition, the harness stay 60 holds the switch lead wire 73 as well as the oil hose 81. Accordingly, the oil hose 81 is supported by the harness stay 60 supporting the lead wire 73 while the lead wire 73 is prevented from swinging due to the rotation of the handlebar 9 to the right and left. As a result, the increase in the number of components can be prevented. Incidentally, the present invention is not limited to the motorcycle 1 described above, and various changes may be included. For example, the switch lead wires 72 and 73 and the instrument lead wire 71 extend on the both lateral sides of the bulb 31 in the above description. However, when the levers 12L and 12R include switches to be on/off in accordance with the operation of the levers 12L and 12R (for example, a stop switch or a clutch switch), the lead wires connected to these switches may extend downward on the both lateral sides of the bulb 31. Moreover, while the battery 49 and the relay units 46 and 48 are exemplified as electrical components disposed behind the handlebar 9, the electrical components disposed behind the handlebar 9 are not limited to these. For example, a CPU (Central processing unit) may be provided below the seat 11, and a control circuit for controlling the entire vehicle may be disposed. Moreover, the lead wires connected to various kinds of electrical components provided on the handlebar 9 may be connected to the control circuit. WE CLAIM: 1. A motorcycle comprising: a steering head for supporting a steering shaft capable of rotating; a headlight having a bulb positioned ahead of the steering head; and lead wires connected to a plurality of electrical components disposed above the steering head, wherein the lead wires are provided to extend in a downward direction on both lateral sides of the bulb from the plurality of electrical components and then in a rearward direction. 2. The motorcycle as claimed in Claim 1, wherein: the plurality of electrical components include a right electrical component disposed on the right side of a handlebar positioned above the steering head and a left electrical component disposed on the left side of the handlebar; the lead wire connected to the right electrical component is provided to extend in the downward direction on the right side of the bulb; and the lead wire connected to the left electrical component is provided to extend in the downward direction on the left side of the bulb. 3. The motorcycle as claimed in Claim 2, wherein: the plurality of electrical components include an instrument disposed between the right electrical component and the left electrical component; and the lead wire connected to the instrument is supported with at least one of the lead wire connected to the right electrical component and the lead wire connected to the left electrical component. 4. The motorcycle as claimed in Claim 1, further comprising a rear lead wire connected to an electrical component disposed behind the plurality of electrical components disposed above the steering head, wherein the lead wires are provided to extend in the downward direction on both lateral sides of the bulb from the plurality of electrical components disposed above the steering head and then in the rearward direction, and thereafter, they are connected to the rear lead wire by a coupler behind the steering head. 5. The motorcycle as claimed in Claim 4, wherein the coupler is covered with a cover. 6. The motorcycle as claimed in Claim 1, further comprising: a supporting member including a right and left pair of frame portions extending vertically behind the headlight; and a pair of holding portions each provided on the right and left pair of frame portions for holding the lead wires capable of extending on both lateral sides of the bulb. 7. The motorcycle as claimed in Claim 6, wherein the supporting member includes at least one lower holding portion for holding the lead wires in a position down below the pair of holding portions. 8. The motorcycle as claimed in Claim 1, further comprising: a supporting member for holding the lead wires capable of extending on both lateral sides of the bulb and for supporting the headlight. 9. The motorcycle as claimed in Claim 8, wherein: the supporting member includes a right and left pair of frame portions extending vertically behind the headlight and a bracket extending from each of the right and left pair of frame portions for supporting the headlight; and the right and left pair of frame portions include a flared portion swelling to the lateral side on a halfway position of the frame portions and the bracket is provided on the flared portion. 10. The motorcycle as claimed in Claim 1, further comprising: a wire provided to extend from a handlebar positioned above the steering head to an apparatus positioned behind the handlebar; and a supporting member for supporting at least one of the lead wires with the wire. 11. The motorcycle as claimed in Claim 1, further comprising: a brake hose extending in the downward direction from a handlebar positioned above the steering head; and a supporting member for supporting at least one of the lead wires with the brake hose. The motorcycle includes: a steering head for supporting a steering shaft capable of rotating; a headlight having a bulb positioned ahead of the steering head; and lead wires connected to switch units and an instrument unit disposed above the steering head. The lead wires are provided to extend in a downward direction from the switch units and the instrument unit on both lateral sides of the bulb and then in a rearward direction.

Full Text

MOTORCYCLE
This application claims priority from Japanese Patent Application No. 2007-341396 filed on December 28, 2007.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a motorcycle in which lead wires connected to electrical components are provided behind a headlight.
2. Description of the Related Art
There has been proposed a motorcycle having a headlight disposed ahead of a steering head that supports a steering shaft capable of rotating. Generally, in this kind of motorcycle, a housing that covers the headlight from behind is provided for housing collected ends of lead wires connected to electrical components disposed above the steering head (for example, a speed meter, a switch provided on lateral sides of a handlebar, and the like) . Moreover, these lead wires are coupled to lead wires connected to a battery, a relay and the like disposed at a rear portion of a vehicle body in the housing.
Also, in a motorcycle disclosed in JP-A-6-115473, a box separated from a headlight is disposed behind the

headlight, and in this box, lead wires connected to electrical components disposed above a steering head are coupled to lead wires connected to electrical components disposed at a rear portion of a vehicle body.
However, in the related motorcycle as described above, in order to secure a space for the housing or the box that houses the lead wires, it is required to dispose the headlight away in front of the steering head. This results in the headlight being disposed away from its rotational center by operation of the handlebar, that is, the steering shaft. Thus, the force required for the steering increases compared to a case where the headlight is disposed adjacent to the steering shaft.
SUMMARY OF THE INVENTION
The present invention is made considering the above problem, and an object of the present invention is to provide a motorcycle which has lead wires provided behind a headlight and in which the headlight can be disposed adjacent to a steering head.
In order to solve the above problem, a motorcycle according to the present invention includes: a steering head for supproting a steering shaft capable of rotating; a headlight having a bulb positioned ahead of the steering head; and lead wires connected to a plurality of

electrical components disposed above the steering head. In addition, the lead wires are provided to extend in a downward direction on both lateral sides of the bulb from the plurality of electrical components and then extend in a rearward direction.
According to the invention, the headlight can be disposed adjacent to the steering head compared to a case where the lead wires are housed in the housing or the box disposed behind the headlight, so that the operability of the handlebar can be improved.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view of a motorcycle according to an embodiment of the present invention;
FIG. 2 is a front view of a portion on which a headlight is mounted in the motorcycle;
FIG. 3 is a front view of an upper portion of the motorcycle in a state that the headlight is removed;
FIG. 4 is a side view of a front portion of the motorcycle in a state that the headlight is removed;
FIG. 5 is a side view of the headlight;
FIG. 6 is a side view of the headlight in which its side portion is partially cut off to show a bulb holding portion positioned in the headlight;
FIG. 7 is a rear view of the headlight;

FIG. 8 is a front view of a harness stay; FIG. 9 is a front view of the harness stay in which lead wires supported by the harness stay is shown in addition to the harness stay;
FIG. 10 is a side view of the harness stay; and FIG. 11 is a side view of the harness stay in which lead wires are shown in addition to the harness stay.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be explained with reference to the drawings. FIG, 1 is a side view of a motorcycle 1 according to the embodiment of the present invention, and FIG. 2 is a front view of a portion where a headlight 30 is attached in the motorcycle 1. Moreover, FIG, 3 is a front view of an upper portion of the motorcycle 1 in a state that the headlight 30 is removed, and FIG, 4 is a side view of a front portion of the motorcycle 1 in a state that the headlight 30 is removed. As shown in FIG, 1 or 3, the motorcycle 1 includes an engine 2, a front wheel 3, a rear wheel 4, a vehicle body frame 20, the headlight 30, an instrument unit 41, a right switch unit 42, a left switch unit 43, and a harness stay 60. The vehicle body frame 20 includes a steering head 21, a main tube 22 and a down tube 23.

As shown in FIG. 1, the steering head 21 is connected to a front end of the main tube 22 and an upper end (front end) of the down tube 23. The main tube 22 extends in a rearward direction from the steering head 21 and suspends the engine 2 disposed below the main tube 22. The down tube 23 extends obliquely downwardly from the steering head 21 and supports the engine 2 positioned behind the down tube 23. A gusset 28 substantially in the shape of triangle is provided between the front end of the main tube 22 and the upper end of the down tube 23 for reinforcement of the main tube 22 and the down tube 23.
The engine 2 has therein a clutch 2a for transmitting or cutting off the driving force of the engine 2. Moreover, a throttle body 14 for controlling the amount of air to be provided to the engine 2 is connected to the engine 2. The rear wheel 4 is disposed behind the engine 2, and the driving force output from the engine 2 is transmitted to the rear wheel 4 through a chain, a belt, etc. which are unillustrated.
As shown in FIG. 4, the steering head 21 supports a steering shaft 5 rotatably inserted through the steering head 21. An upper end and a lower end of the steering shaft 5 are fixed to an upper bracket 7 and an under bracket 6 respectively. A handle holder 7a is provided

on an upper surface of the upper bracket 7. The handle holder 7a is provided so that it stands on the upper surface of the upper bracket 7, and supports a handlebar 9 disposed above the steering head 21.
As shown in FIG. 3, grips 9R and 9L, and levers 12R and 12L are provided on lateral ends of the handlebar 9. The lever 12R is positioned ahead of the grip 9R, and the lever 12L is positioned ahead of the grip 9L. For example, the lever 12R is a clutch lever, which is connected to the clutch 2a positioned behind the handlebar 9 (refer to FIG. 1) through a wire 77. For example, the lever 12L is a front wheel brake lever, which actuates a front wheel brake 13 in accordance with an operation of a rider (refer to FIG. 1) . In this embodiment, the front wheel brake 13 is a hydraulic brake, and the lever 12L is connected to the front wheel brake 13 through an oil hose 81 for transmitting the motion of the lever 12L by hydraulic pressure.
Front suspensions 8 and 8 are supported by the under bracket 6 and the upper bracket 7. More specifically, the front suspensions 8 and 8, constituted by a pair of right and left suspensions, have upper portions to be inserted through right and left ends of the under bracket 6 and the upper bracket 7, and the front suspensions 8, 8 are supported by these right and left ends. The front

wheel 3 is disposed between the front suspensions 8 and 8, and the lower ends 8a and 8a of the suspensions 8 and 8 support the axle of the front wheel 3 (refer to FIG. 1). The handlebar 9 rotates to the right and left about the steering shaft 5 together with the upper bracket 7, the under bracket 6, the front suspensions 8 and 8, and the front wheel 3 (refer to FIG. 1 or 4).
As shown in FIG. 3, a plurality of electrical components are disposed above the steering head 21. More specifically, the right switch unit 42, the left switch unit 43 and the instrument unit 41 are disposed above the steering head 21. The right switch unit 42 is disposed on the right side of the handlebar 9 and includes, for example, a starter switch for operating a starter motor that actuates the engine 2, and a switch for turning on/off the headlight 30. The left switch unit 43 is disposed on the left side of the handlebar 9 and includes a switch for changing the illuminating direction of the headlight 30 vertically, a switch for switching on/off flashers 44, 44 and the like (refer to FIG. 2).
As shown in FIG. 3 or 4, the instrument unit 41 includes a speed meter for indicating a vehicle speed and a tachometer for indicating the engine speed. In a front view of a vehicle body, the instrument unit 41 is interposed between the right switch unit 42 and the left

switch unit 43 and disposed in front of the middle portion of the handlebar 9. Moreover, in a side view of a vehicle, the instrument unit 41 is positioned obliquely upward with respect to the steering head 21.
As shown in FIG. 1 or 2, a plurality of electrical components is also disposed behind the right switch unit 42, the left switch unit 43 and the instrument unit 41. More specifically, a battery 49 that stores the electric power supplied to the electrical components is disposed below a front end of a seat 11 to be seated by the rider. Moreover, relay units 46 and 48 are disposed below the seat 11 for switching on/off the electrical power supply to the electrical components such as the headlight 30 and the flashers 44 and 44. A harness (the rear lead wire) 79 including lead wires connected to the relay units 46 and 48 is provided to extend in the forward direction of the vehicle body along the main tube 22. A front end of the harness 79 is positioned on the lateral side of the gusset 28 (refer to Fig. 4).
FIGs. 5 and 6 are side views of the headlight 30. In FIG. 6, a side portion 33 of the headlight 30 is partially cut off to show its inner portion. FIG. 7 is a rear view of the headlight 30.
As shown in FIG. 6, the headlight 30 is disposed ahead of the steering head 21. The headlight 30 includes

a bulb 31 positioned ahead of the steering head 21 and a reflector 32 in the shape of a forwardly opening bowl in which the bulb 31 is disposed. The bulb 31 illuminates by the electric power supplied from the battery 49 through the relay unit 46, and the reflector 32 reflects the light from the bulb 31 in the forward direction.
The bulb 31 is inserted in a rear end of the reflector 32 (a bottom of the bowl-shaped reflector 32) where a bulb holding portion 32e for holding a basal portion of the bulb 31 is provided.
As shown in FIG. 5 or 7, the headlight 30 includes the side portions 33 and 33 and an upper portion 34. The side portions 33 and 33 are positioned on the lateral sides of the reflector 32 to cover the reflector 32 from the lateral sides. The upper portion 34 is positioned on an upper portion of the reflector 32 to cover the reflector 32 from the upper side.
A mounting portion 33a is provided on an upper portion of the side portion 33, a mounting hole 33b is formed below the mounting portion 33a, and a mounting portion 33c is provided below the mounting hole 33b. The flashers 44 and 44 are disposed on both lateral sides of the headlight 30 (refer to FIG. 2), and a basal portion of the flasher 44 is inserted in the mounting hole 33b. This arrangement allows the flasher 44 to be supported on

the lateral side of the headlight 30. Moreover, mounting potions 32b and 32b are formed on the reflector 32. The mounting portion 33c of the side portion 33 is fixed to the mounting portion 32b by a bolt 36.
Moreover, the mounting portions 32a and 32a are formed on the reflector 32. The mounting portion 33a of the side portion 33 is fixed to the harness stay 60 by a bolt 37 together with the mounting portion 32a. The harness stay 60 will be described later in detail.
As shown in FIG. 3, lead wires are connected to each of the plural electrical components disposed above the steering head 21. More specifically, a switch lead wire 72 is connected to the right switch unit 42. The switch lead wire 72 includes a plurality of lead wires connected to various kinds of switches provided on the right switch unit 42. A switch lead wire 73 is connected to the left switch unit 43. The switch lead wire 73 includes lead wires connected to various kinds of switches provided on the left switch unit 43. Moreover, an instrument lead wire 71 includes lead wires connected to instruments (such as the speed meter and the tachometer) provided in the instrument unit 41, and is connected to a rear surface of the instrument unit 41. A connecting position of the instrument lead wire 71 is on the lateral side of the steering head 21 (the left side in the embodiment) .

Additionally, while positions on which the lead wires are provided and the support configurations of the lead wires are explained with an example of the switch lead wires 72 and 73 and the instrument lead wire 71 in this embodiment, the kind of the lead wires are not limited to these. For example, the levers 12L and 12R may include switches to be switched on/off in accordance with the operation of the levers 12L and 12R, and the lead wires may be connected to these switches.
FIGs. 8 and 9 are front views of the harness stay 60 for supporting the above lead wires 71, 72 and 73. FIGs. 10 and 11 are side views of the harness stay 60. In FIGs. 9 and 11, in addition to the harness stay 60, a plurality of lead wires connected to the electrical components are also shown.
The lead wires 71, 72 and 73 are provided to extend in a downward direction on both lateral sides of the bulb 31 provided to the headlight 30, and are bent in the rearward direction below the bulb 31. More specifically, as shown in FIG. 3 or 9, the switch lead wire 72 extends slightly to the center in the width direction of the vehicle from the right switch unit 42 and curves in the downward direction in front of the handlebar 9. Then, the switch lead wire 72 extends substantially straight in the downward direction not only on the right side of the

bulb 31 but also on the inner side (the center side of the width direction of the vehicle) of the right front suspension 8 and the side portion 33 of the headlight 30 (refer to FIGs. 5 and 6) to be positioned ahead of the under bracket 6.
In a similar manner, the switch lead wire 73 extends slightly to the center in the width direction of the vehicle from the left switch unit 43 and curves in the downward direction in front of the handlebar 9. Then, the switch lead wire 73 extends substantially straight in the downward direction not only on the left side of the bulb 31 but also on the inner side of the left front suspension 8 and the side portion 33 of the headlight 30 to be positioned ahead of the under bracket 6.
The instrument lead wire 71 extends in the downward direction from the connecting position with the instrument unit 41 on the left side of the bulb 31 and curves to the center in the width direction of the vehicle. The instrument lead wire 71, the lead wire 75 connected to the bulb 31, and the lead wires 74 and 74 connected to the flashers 44 and 44 are bundled together below the bulb 31. A harness 70 is constituted by the instrument lead wire 71 and the lead wires 74, 74 and 75.
The switch lead wire 72, the switch lead wire 73, and the harness 70, which extend in the downward direction in

the above manner, are bent in the rearward direction after reaching ahead of the under bracket 6 to extend downward in a position below the under bracket 6 and the steering head 21 (refer to FIG. 4).
As shown in FIG. 4, the harness 70 and lead wires 72 and 73 are connected to the harness 79 behind the steering head 21. More specifically, the harness 70 and lead wires 72 and 73 have rear ends each provided with couplers 70a, 72a and 73a respectively. The couplers 70a, 72a and 73a are positioned behind the steering head 21 and covered with a cover 82 fixed to the gusset 28. Moreover, the couplers 70a, 72a and 73a are connected to couplers 79a, 79a and 79a provided on a front end of the harness 79. The harness 79 is provided to extend in the rearward direction on the opposite side of the couplers 70a, 72a and 73a across the main tube 22.
As shown in FIG. 3, a plurality of wires 76 and 77 (two wires in the embodiment) are connected to the right side of the handlebar 9. For example, the wire 76 is a choke wire, which has a front end connected to a choke lever 45 provided adjacent to the right switch unit 42 on the handlebar 9. The throttle body 14 is provided with a choke (not shown) for regulating the amount of air supplied to the engine 2, and a rear end of the wire 76 is connected to the choke. As described above, for

example, the wire 77 is a clutch wire, which has a front end connected to the lever 12R and a rear end connected to the clutch 2a.
As shown in FIG. 9, the wires 76 and 77 extend slightly to the center in the width direction of the vehicle from respective connecting positions with the choke lever 45 and the lever 12R, are bent in the downward direction, and extend downward with the switch lead wire 72. Thereafter, the wires 76 and 77 are bent in the rearward direction between the steering head 21 and the right side of front suspension 8 and extend in the rearward direction along the gusset 28 (refer to FIG. 3 or 4) .
As shown in FIG. 3, a wire 78 and the oil hose 81 are connected to the left side of the handlebar 9. For example, the wire 78 is a throttle wire, which has a front end connected to a throttle housed in the grip 9L and a rear end connected to the throttle body 14 positioned behind the handlebar 9. Similarly to the wires 76 and 77, the wire 78 is provided to extend to the center in the width direction of the vehicle from a connecting position with the grip 9L and then to extend downward with the switch lead wire 73 (refer to FIG. 9). Thereafter, the wire 78 is bent in the rearward direction between the steering head 21 and the left front

suspension 8 and extends in the rearward direction along the gusset 28.
As described above, the front wheel brake 13 is a hydraulic brake, and an upper end of the oil hose 81 is connected to a cylinder 9a provided on a basal portion of the lever 12L. The oil hose 81 extends to the center in the width direction of the vehicle from a connecting position with the cylinder 9a, and extends downward with the switch lead wire 73 (refer to FIG. 9). Then, the oil hose 81 extends in the downward direction, passes in front of the under bracket 6 (refer to FIG. 3), and is connected to the front wheel brake 13 (refer to FIG. 1).
The harness stay 60 is a member for holding the switch lead wires 72, 73 and the instrument lead wire 71 capable of extending in the downward direction on lateral sides of the bulb 31, and supporting the headlight 30 ahead of the steering head 21. Hereinafter, the harness stay 60 will be explained in detail.
As shown in FIG. 8 or 10, the harness stay 60 includes
a right and left pair of frame portions 61 and 61 extending vertically, an upper plate 62, and a lower plate 63 disposed across the frame portions 61 and 61 behind the headlight 30.
The harness stay 60 is supported by the upper bracket

7 and the under bracket 6. More specifically, as shown in FIG. 10, inserting portions 61a and 61a extending upward are provided on upper portions of the frame portions 61 and 61. Holes are formed in a bottom surface of the upper bracket 7, and the inserting portions 61a and 61a are inserted in the holes of the upper bracket 7. Meanwhile, the lower plate 63 is fixed to a front surface of the under bracket 6 by a bolt (not shown) in a state that the inserting portions 61a and 61a are inserted in the holes of the upper bracket 7 from the lower side.
The harness stay 60 supports the headlight 30 in addition to the lead wires 71, 72, and 73. More specifically, as shown in FIG. 8, flared portions 61c and 61c swelling to the outside in the width direction of the vehicle are provided on a halfway position of the frame portions 61 and 61. Moreover, brackets 61b and 61b projecting forward are provided on the flared portions 61c and 61c (refer to FIG. 10) . The bracket 61b is positioned on the inner side (the center side of the width direction of the vehicle) of the side portion 33 of the headlight 30, and fixed to the mounting portions 32a and 33a provided on the headlight 30 (refer to FIG. 7).
Incidentally, the headlight 30 is configured so that its posture with respect to the harness stay 60 can be changed. More specifically, as shown in FIG. 8 or 10, a

bracket 61d is provided below the bracket 61b on the frame portion 61. A bracket 32d is provided on a rear surface of the headlight 30 (refer to FIG. 7), and the bracket 32d is fixed to the bracket 61d by a bolt 69. A bolt attaching hole 32f formed in the bracket 32d is an elongated hole in the forward and rearward direction, and the bracket 32d is relatively movable with respect to the bracket 61d. This allows the headlight 30 to move vertically setting the bolt that fixes the mounting portion 32a to the bracket 61b as a supporting point.
Moreover, a plurality of clamps is provided on the frame portions 61 and 61. Each clamp supports the lead wires 71, 72 and 73 capable of extending vertically on both lateral sides of the bulb 31. More specifically, as shown in FIG. 8 or 10, a right and left pair of first clamps 64 and 64 and a right and left pair of second clamps 65 and 65 is provided on the frame portions 61 and 61. Moreover, the frame portions 61 and 61 are provided with a third clamp 66 positioned below the second clamps 65 and 65 and disposed across the right and left frame portions 61 and 61, and a fourth clamp 67 disposed below the third clamp 66.
The first clamps 64 and 64 extend to the lateral sides from the frame portions 61 and 61 above the bulb 31. The first clamps 64 and 64 hold the switch lead wires 72

and 73 provided on the lateral sides of the frame portions 61 and 61 (refer to FIGs. 9 and 11). Additionally, the first clamps 64 and 64 are wire members that are bent at several portions to hold the switch lead wires 72 and 73.
The second clamps 65 and 65 are disposed below the first clamps 64 and 64 and closer to the center in the width direction of the vehicle than the first clamps 64 and 64. The second clamps 65 and 65 extend in the rearward direction from the frame portions 61 and 61. The left second clamp 65 holds the instrument lead wire 71 as well as the switch lead wire 73 positioned behind the frame portion 61, and the right second clamp 65 holds the switch lead wire 72 positioned behind the frame portion 61.
Additionally, the second clamps 65 and 65 are disposed below the bulb 31. The second clamps 65 and 65 are wire members that are bent at several portions to hold the switch lead wires 72 and 73 and the instrument lead wire 71. Holding by the first clamp 64 and the second clamp 65 enables the switch lead wires 72 and 73 to be provided substantially straight between the clamps 64 and 65.
As shown in FIG. 9, the left first clamp 64 holds the oil hose 81 and the wire 78 in addition to the switch

lead wire 73. This allows the oil hose 81 to be supported to extend in the downward direction on the left side of the bulb 31. The right first clamp 64 holds the wires 7 6 and 77 as well as the switch lead wire 72. The wires 76 and 77 are bent in the rearward direction between the first clamp 64 and the second clamp 65 (refer to FIG. 11) . Moreover, the left second clamp 65 holds the lead wire 74 connected to the left flasher 44 and the lead wire 75 connected to the bulb 31. The right second clamp 65 holds the lead wire 7 4 connected to the right flasher 44.
The third clamp 66 is disposed below the second clamps 65 and 65 and positioned below the bulb 31. The third clamp 66 holds the instrument lead wire 71, the lead wire 74, and the lead wire 75 between the frame portions 61 and 61. Additionally, the third clamp 66 is a wire member that is bent at several portions to hold the instrument lead wire 71 and the lead wires 74 and 75.
The fourth clamp 67 is positioned below the third clamp 66 to hold the harness 70 and the switch lead wires 72 and 73 not only ahead of but also below the under bracket 6 in order to bend the harness 70 and the switch lead wires 72 and 73 in the rearward direction.
More specifically, as shown in FIG. 9 or 11, the fourth clamp 67 includes a front holding portion 67a and

a rear holding portion 67b. The front holding portion 67a is positioned ahead of the under bracket 6 for supporting the switch lead wires 72 and 73 and the harness 70 at that position. The fourth clamp 67 is also positioned below the under bracket 6 for supporting the switch lead wires 72 and 73 and the harness 70 at that position. In this way, the switch lead wires 72 and 73 and the harness 70 are bent in the rearward direction since they are held not only ahead of but also below the under bracket 6. Thereafter, the switch lead wires 72 and 73 and the harness 70 extend in the rearward direction along the gusset 28 to be connected to the harness 79 by the couplers 72a, 73a and 70a adjacent to the gusset 28 as described above.
Moreover, the harness stay 60 supports the instrument unit 41 since the upper plate 62 is fixed to a rear surface of the instrument unit 41 by a plurality of bolts 93. More specifically, as shown in FIG. 8, a plurality of mounting holes (three in the embodiment) 62a, 62a and 62a are formed on the edge of the upper plate 62. The mounting hole 62a is fixed to the rear surface of the instrument unit 41 via a cylindrical damper 92 whose lateral ends are flared like a flange (refer to FIG. 11) . In other words, the damper 92 is fitted on an inner side of the mounting hole 62a and the flange-shaped lateral

ends of the damper 92 are interposed not only between the edge of the mounting hole 62a, and the rear surface of the instrument unit 41 but also between a head portion of the bolt 93 and a bottom surface of the upper plate 62. Then, the bolt 93 passes through the damper 92 fitted on the inner side of the mounting hole 62a and is fixed to the rear surface of the instrument unit 41.
In the motorcycle 1 described above, each of the switch lead wires 72 and 73 and the instrument lead wire 71 is provided to extend in the downward direction from the switch units 42 and 43 and the instrument unit 41 respectively on both lateral sides of the bulb 31 and then in the rearward direction. This allows the headlight 30 to be disposed adjacent to the steering head 21 compared to a case where the lead wires are provided in the housing that covers the headlight 30 from behind. As a result, the force required for steering can be reduced, which improves the operability of the handlebar 9.
Moreover, the motorcycle 1 includes the right switch unit 42 disposed on the right side of the handlebar 9, and the left switch unit 43 disposed on the left side of the handlebar 9. In addition, the switch lead wire 72 connected to the right switch unit 42 is provided to extend in the downward direction on the right side of the

bulb 31, and the switch lead wire 73 connected to the left switch unit 43 is provided to extend in the downward direction on the left side of the bulb 31. This simplifies the installation route of the lead wires 72 and 73.
Moreover, the motorcycle 1 includes the instrument unit 41 disposed between the right switch unit 42 and the left switch unit 43. In addition, the instrument lead wire 71 connected to the instrument unit 41 is supported together with the switch lead wire 73 connected to the left switch unit 43. This prevents the instrument lead wire 71 from swinging due to the rotation of the handlebar 9 to the right and left. Additionally, the instrument lead wire 71 may be bundled with the switch lead wire 72.
Moreover, the motorcycle 1 includes the harness 79 that bundles the lead wires connected to the plurality of electrical components (the battery 49 and the relay units 46 and 48 in this embodiment) disposed behind the switch units 42 and 43 or the instrument unit 41 disposed above the steering head 21. The switch lead wires 72 and 73 and the instrument lead wire 71 are provided to extend in the downward direction on both lateral sides of the bulb 31 and then in the rearward direction. Then, they are connected to the lead wires included in the harness 79 by

the couplers 72a, 73a and 70a behind the steering head 21. This allows the couplers 72a, 73a and 70a to be provided behind the steering head 21, which simplifies the installation of the lead wires 71, 72 and 73 around the steering head 21 and the headlight 30.
Moreover, the couplers 72a, 73a and 70a are covered with the cover 82. This allows for the protection of the couplers 72a, 73a and 70a.
Moreover, the motorcycle 1 includes the harness stay 60 having the right and left pair of frame portions 61 and 61 extending vertically behind the headlight 30, and the pair of first clamps 64 and 64 each provided on the pair of frame portions 61 and 61 respectively for supporting the lead wires 72 and 73 capable of extending vertically on both lateral sides of the bulb 31. This makes it possible to stably support the lead wires 72 and 73 provided on both lateral sides of the bulb 31.
Moreover, the harness stay 60 includes the second clamps 65 and 65 for supporting the lead wires 71, 72 and 73 below and away from the first clamps 64 and 64. This makes it possible to support the lead wires 71, 72 and 73 provided on both lateral sides of the bulb 31 more stably.
Moreover, in the motorcycle 1, the harness stay 60 not only holds the lead wires 71, 72 and 73 capable of extending on both lateral sides of the bulb 31 but also

supports the headlight 30. Accordingly, the headlight 30 is also supported by the harness stay 60 while the lead wires 71, 72 and 73 are prevented from swinging due to the rotation of the handlebar 9 to the right and left. As a result, the increase in the number of components can be prevented.
Moreover, the harness stay 60 includes the right and left pair of frame portions 61 and 61 extending vertically behind the headlight 30, and the brackets 61b and 61b each extending from the right and left pair of frame portions 61 and 61 respectively for supporting headlight 30. The right and left pair of frame portions 61 and 61 include, on a halfway position thereof, flared portions 61c and 61c swelling to the lateral side, and the brackets 61b and 61b are provided on the flared portions 61c and 61c. This allows for the stable support of the headlight 30 that is wider than an interval between the frame portions 61 and 61.
Moreover, the motorcycle 1 includes the wires 76, 77 and 78 provided from the handlebar 9 disposed above the steering head 21 to be directed to the components behind the handlebar 9 (the clutch 2a, the throttle body 14, and the choke in the above description). The harness stay 60 holds the switch lead wires 72 and 73 in addition to the wires 76, 77 and 78. Accordingly, the wires 76, 77 and

78 are also supported by the harness stay 60 while the lead wires 72 and 73 and the wires 76, 77 and 78 are prevented from swinging due to the rotation of the handlebar 9 to the right and left. As a result, the increase in the number of components can be prevented.
Moreover, the motorcycle 1 includes the oil hose 81 that extends downward from the handlebar 9 positioned above the steering head 21. In addition, the harness stay 60 holds the switch lead wire 73 as well as the oil hose 81. Accordingly, the oil hose 81 is supported by the harness stay 60 supporting the lead wire 73 while the lead wire 73 is prevented from swinging due to the rotation of the handlebar 9 to the right and left. As a result, the increase in the number of components can be prevented.
Incidentally, the present invention is not limited to the motorcycle 1 described above, and various changes may be included. For example, the switch lead wires 72 and 73 and the instrument lead wire 71 extend on the both lateral sides of the bulb 31 in the above description. However, when the levers 12L and 12R include switches to be on/off in accordance with the operation of the levers 12L and 12R (for example, a stop switch or a clutch switch), the lead wires connected to these switches may extend downward on the both lateral sides of the bulb 31.

Moreover, while the battery 49 and the relay units 46 and 48 are exemplified as electrical components disposed behind the handlebar 9, the electrical components disposed behind the handlebar 9 are not limited to these. For example, a CPU (Central processing unit) may be provided below the seat 11, and a control circuit for controlling the entire vehicle may be disposed. Moreover, the lead wires connected to various kinds of electrical components provided on the handlebar 9 may be connected to the control circuit.

WE CLAIM:
1. A motorcycle comprising:
a steering head for supporting a steering shaft capable of rotating;
a headlight having a bulb positioned ahead of the steering head; and
lead wires connected to a plurality of electrical components disposed above the steering head,
wherein the lead wires are provided to extend in a downward direction on both lateral sides of the bulb from the plurality of electrical components and then in a rearward direction.
2. The motorcycle as claimed in Claim 1, wherein:
the plurality of electrical components include a
right electrical component disposed on the right side of
a handlebar positioned above the steering head and a left
electrical component disposed on the left side of the
handlebar;
the lead wire connected to the right electrical
component is provided to extend in the downward direction
on the right side of the bulb; and
the lead wire connected to the left electrical
component is provided to extend in the downward direction
on the left side of the bulb.

3. The motorcycle as claimed in Claim 2, wherein:
the plurality of electrical components include an instrument disposed between the right electrical component and the left electrical component; and
the lead wire connected to the instrument is supported with at least one of the lead wire connected to the right electrical component and the lead wire connected to the left electrical component.
4. The motorcycle as claimed in Claim 1, further
comprising a rear lead wire connected to an electrical
component disposed behind the plurality of electrical
components disposed above the steering head,
wherein the lead wires are provided to extend in the downward direction on both lateral sides of the bulb from the plurality of electrical components disposed above the steering head and then in the rearward direction, and thereafter, they are connected to the rear lead wire by a coupler behind the steering head.
5. The motorcycle as claimed in Claim 4, wherein the coupler is covered with a cover.
6. The motorcycle as claimed in Claim 1, further

comprising:
a supporting member including a right and left pair of frame portions extending vertically behind the headlight; and
a pair of holding portions each provided on the right and left pair of frame portions for holding the lead wires capable of extending on both lateral sides of the bulb.
7. The motorcycle as claimed in Claim 6, wherein the supporting member includes at least one lower holding portion for holding the lead wires in a position down below the pair of holding portions.
8. The motorcycle as claimed in Claim 1, further comprising:
a supporting member for holding the lead wires capable of extending on both lateral sides of the bulb and for supporting the headlight.
9. The motorcycle as claimed in Claim 8, wherein:
the supporting member includes a right and left pair of frame portions extending vertically behind the headlight and a bracket extending from each of the right and left pair of frame portions for supporting the

headlight; and
the right and left pair of frame portions include a flared portion swelling to the lateral side on a halfway position of the frame portions and the bracket is provided on the flared portion.
10. The motorcycle as claimed in Claim 1, further
comprising:
a wire provided to extend from a handlebar positioned above the steering head to an apparatus positioned behind the handlebar; and
a supporting member for supporting at least one of the lead wires with the wire.
11. The motorcycle as claimed in Claim 1, further
comprising:
a brake hose extending in the downward direction from a handlebar positioned above the steering head; and
a supporting member for supporting at least one of the lead wires with the brake hose.

The motorcycle includes: a steering head for supporting a steering shaft capable of rotating; a headlight having a bulb positioned ahead of the steering head; and lead wires connected to switch units and an instrument unit disposed above the steering head. The lead wires are provided to extend in a downward direction from the switch units and the instrument unit on both lateral sides of the bulb and then in a rearward direction.

Documents:

http://ipindiaonline.gov.in/patentsearch/GrantedSearch/viewdoc.aspx?id=5BJKVouDoLgPHIo4vGQMLQ==&loc=wDBSZCsAt7zoiVrqcFJsRw==

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Patent Number

271528

Indian Patent Application Number

2008/KOL/2008

PG Journal Number

09/2016

Publication Date

26-Feb-2016

Grant Date

24-Feb-2016

Date of Filing

17-Nov-2008

Name of Patentee

YAMAHA HATSUDOKI KABUSHIKI KAISHA

Applicant Address

2500 SHINGAI, IWATA-SHI, SHIZUOKA

Inventors:

#	Inventor's Name	Inventor's Address
1	MIKIO AOYAGI	C/O YAMAHA HATSUDOKI KABUSHIKI KAISHA 2500 SHINGAI, IWATA-SHI, SHIZUOKA

PCT International Classification Number

B62K11/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	2007-341396	2007-12-28	Japan