Title of Invention

BLOOD SAMPLING DEVICE

Abstract

A blood sampling device includes a barrel having a cylindrical body defining a longitudinally extended receiving hole, a needle receiving opening and a tube receiving opening, a sliding portion, a stop portion, and a spring bias portion. A control part has a .~ sliding portion slidably inserted in the sliding portion of the barrel, an engage hole, a spring which is biased on the spring bias portion- of the barrel, and a finger pressing portion. A needle set has a holder body, an insert portion, a constraint portion which can be locked and unlocked by the engage hole of the control part, a needle which has a first needle tip and a second needle tip. And an ejecting set being disposed inside the receiving hole of the barrel, the ejecting set has a needle stop portion providing insertion and stop of the insert portion of the needle set, and an ejecting spring.

Full Text

GROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to medical devices, and more particularly to a blood sampling device which easy to mount a needle set and enables the needle set ejective. 2. Description of the Related Art The prior blood sampling devices usually have a simple design, in use, the needle set cannot dispart from the barrel, and must use a new one blood sampling device, therefore increase the cost and a lot of garbage. There are many type of blood sampling devices which needle set can be dispart from the barrel by finger snap, but the hand of the user will touch the needle set, then result the needle stick or finger touch the blood often. Those better improving blood sampling devices which can eject the needle set, but the operating are more difficult, and will not work exactly or cannot eject, and the cost higher. Therefore, it is desirable to provide a blood sampling device that eliminates the aforesaid drawbacks. SUMMARY OF THE INVENTION The present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide a blood sampling device, which enables the needle set ejected automatically by a simple finger operation after the service of the device. It is another object of the present invention to provide a blood sampling device, which can conveniently be operated to control engaging/disengaging of the needle set with the barrel. It is still another object of the present invention to provide a blood sampling device, which has a simple structure for easy assemble and cheaper. To achieve these and other objects of the present invention, the blood sampling device includes a barrel having a cylindrical body defining a longitudinally extended receiving hole, a needle receiving opening and a tube receiving opening formed on each side of the receiving hole, a sliding portion, a stop portion, and a spring bias portion. A control part has a sliding portion slidably inserted in the sliding portion of the barrel, an engage hole, a spring which is biased on the spring bias portion of the barrel, and a finger pressing portion. A needle set has a holder body, an insert portion, a constraint portion which can be locked and unlocked by the engage hole of the control part, a needle which has a first needle tip and a second needle tip directing to the inside and outside of the barrel respectively. And an ejecting set being disposed inside the receiving hole of the barrel, the ejecting set has a needle stop portion providing insertion and stop of the insert portion of the needle set, and an ejecting spring. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional assembly view of a blood sampling device according to one embodiment of the present invention. FIG. 2 is a sectional depart view of the embodiment shown in FIG. 1. FIG 3 is an upper sectional view of the barrel of the embodiment. FIG. 4 is a side view of the barrel of the embodiment. FIG. 5 is a left side view of the control part of the embodiment. FIG. 6 is similar to FIG. 1 but showing the needle set disengaged from the constraint of the barrel. PIG. 7 is similar to FIG. 6 but showing the needle set assembled status. FIG 8 is similar to FIG. 7 and showing the blood collection tube inserted into barrel. FIG 9 is similar to FIG 7 and showing the needle set ejected. FIG. 10 is an end view of another barrel of the present invention. FIG. 11 is a side view of another control part of the present invention. FIG 12 is a sectional view of another embodiment of the present invention, showing a protective cover. FIG. 13 is a left side view of the FIG 12. DETAILED DESCRIPTION OF THE INVENTION Referring to FIGS. 1 -9, a blood sampling device according to the first embodiment of the present invention can be inserted by a blood collection tube 8 for collecting blood, the blood sampling device comprises a barrel 10, a control part 20, a needle set 30, and an ejecting set 40. The barrel 10 has a cylindrical body 11 defining a longitudinally extended receiving hole 12, a needle receiving opening 13 and a tube receiving opening 14 formed on each side of the receiving hole 12, a first position portion 15 and a second position portion 16 being formed inside the receiving hole 12, a sliding portion 17, a stop portion 18, and a spring bias portion 19. The control part 20 has a sliding portion 21 slidably inserted in the sliding portion 17 of the barrel 10, a finger pressing portion 22, an engage hole 23 which formed by a first hole 231 and a second hole 232 and for lock and release the needle set 30, a conical stop flange 233 formed outwardly on the peripheral of the second hole 232, a spring bias portion 24, an ending stop 25 for stopped by the stop portion 18 of the barrel 10, a spring 29 which is a compression spring and fit on the spring bias portion 24 and to spring the spring bias portion 19 of the barrel 10. The needle set 30 has a holder body 31, an insert portion 32 formed of conical shape, a constraint portion 33 formed of a neck shape, a needle 35 which has a first needle tip 351 and a second needle tip 352 directing to the inside and outside of the barrel 10 respectively. And a rubber horse 37 fit on the second needle tip 352 of the needle 35. The ejecting set 40 has a fixation seat 41 which has a seat body 42 disposed inside the receiving hole 12 of the barrel 10, a stop flange 43 stopped on the second position portion 16 of the barrel 10, and insert hole 44; a needle ejector 45 which has an ejector body 46, a needle through hole 47 and a needle stop portion 48 for insert and stop the needle set 30 respectively; and an ejecting spring 49 which is a compression spring positioned between the fixation seat 41 and the needle ejector 45. The operation of the present invention is outlined hereinafter. First, put the ejecting set 40 inside the receiving hole 12 of the barrel 10, that is, the fixation seat 41 of the ejecting set 40 is positioned by the second position portion 16 of the barrel 10; and put the control part 20 into the barrel 10, that is, the engage hole 23 of the control part 20 is stopped by the needle set 30 and moving a little upper position; and formed a combination of the blood sampling device. In use, put the needle set 30 on, that is let the second needle tip 352 of the needle set 30 directing to the needle through hole 47 of the ejecting set 40, and push the needle set 30 inwards and let the constraint portion 33 of the needle set 30 to push the needle stop portion 48 of the ejecting set 40 and the ejecting spring 49 is compressed; at the same time, the engage hole 23 of the control part 20 can be moved diametrically pushed by the axially moving of the needle set 30, when the constraint portion 33 of the needle set 30 moved to the engage hole 23 of the control part 20, the spring 29 then spring back the control part 20 and let the second hole 232 lock the constraint portion 33 of the needle set 30. In use, insert the blood collection tube 8 to the receiving hole 12 of the barrel 10, and penetrated by the second needle tip 352 of the needle set 30, then the first needle tip 351 can insert the vein to collect blood. After use, the needle set 30 can be dispart from the barrel 10 and control part 20 by steps below; wherein push the finger pressing portion 22 of the control part 20, then the control part 20 compressed the spring 29 and move downwardly, in the mean time, the constraint portion 33 of the needle set 30 is positioned to the first hole 231 of the engage hole 23 of the control part 20, the needle set 30 then did not constraint by the control part 20 and ejected by the ejecting spring 49 of the ejecting set 40, as show in Fig. 9. The blood sampling device recited in this embodiment which can be operated easily and convineament, and ejected the needle set 30 exactly and quickly, the structure is simple, which can achieve the objects of the present invention. As show in Fig. 10, another barrel 10A of the present invention which has a different needle receiving opening 13A and stop portion 18A. As show in Fig. 11, another spring 29A of the control part 2OA is an elastic bendable plate integral with the sliding portion. Further, as show in Figs. 11-12, another embodiment of the present invention further comprises a protective cover 50, wherein: The barrel 10B further has two sliding grooves 19B. The protective cover 50 have a cover body 51, two sliding bar 53 formed on each side of the cover body 51, a stop flange 55 for stopped by the finger pressing portion 22 of the control part 20. Therefore, the protective cover 50 is provided slidably covering the control part 20 to avoid mis-press of finger and more safe. As indicated above, the invention has the following characteristics: 1. The ejecting set of the blood sampling device enables the needle set ejected automatically by a simple finger operation on the control part after the service of the device. 2. The control part of the blood sampling device provided convenient operation to control engaging/disengaging of the needle set with the barrel. 3. The combination of the blood sampling device has a simple structure for easy assemble and cheaper, and more safety for preventing needle stick. I claim: 1. A blood sampling device comprising: a barrel(lO) having a cylindrical body defining a longitudinally extended receiving hole, a needle receiving opening and a tube receiving opening formed on each side of said receiving hole, a sliding portion, a stop portion, and a spring bias portion; a control part(2O) having a sliding portion slidably inserted in said sliding portion of said barrel, an engage hole, a spring which is biased on said spring bias portion of said barrel, and a finger pressing portion; a needle set(3O) having a holder body, an insert portion, a constraint portion capable of being locked and unlocked by said engage hole of said control part, a needle which has a first needle tip and a second needle tip directing to the inside and outside of said barrel respectively; and an ejecting set(4O) being disposed inside said receiving hole of said barrel, said ejecting set having a needle stop portion providing insertion and stop of said insert portion of said needle set, and an ejecting spring. 2. The blood sampling device as claimed in claim 1, wherein said control part further has an ending stop, said barrel further has a stop portion for stop said ending stop of said control part. 3. The blood sampling device as claimed in claim 1, wherein said spring of said control part is a detachable compression spring. 4. The blood sampling device as claimed in claim 1, wherein said spring of said control part is an integral elastic bendable plate. 5. The blood sampling device as claimed in claim 1, wherein said barrel further has a first position portion and a second position portion being formed inside said receiving hole, and said ejecting set is fitted therebetween. 6. The blood sampling device as claimed in claim 1, wherein said control part further has a conical stop flange formed outwardly on an opening of said engage hole. 7. The blood sampling device as claimed in claim 1, wherein said insert portion of said needle set is formed forwardly of a conical shape. 8. The blood sampling device as claimed in claim 1, wherein said ejecting spring of said ejecting set is a compression spring. 9. The blood sampling device as claimed in claim 1, wherein said ejecting set further has a needle ejector which is pushed by said ejecting spring and said needle stop portion is formed thereon. 10. The blood sampling device as claimed in claim 1, including a protective cover to slidably cover said control part.

Documents:

038-che-2004-abstract.pdf

038-che-2004-claims filed.pdf

038-che-2004-claims granted.pdf

038-che-2004-correspondnece-others.pdf

038-che-2004-correspondnece-po.pdf

038-che-2004-description(complete)filed.pdf

038-che-2004-description(complete)granted.pdf

038-che-2004-drawings.pdf

038-che-2004-form 1.pdf

038-che-2004-form 26.pdf

038-che-2004-form 3.pdf

038-che-2004-form 5.pdf

038-che-2004-other documents.pdf