A kind of retraction type safe blood-taking needleTechnical field
The present invention relates to a kind of retraction type blood taking needle, belong to technical field of medical instruments.
Background technology
Blood taking needle is one of medical device product of current global sales maximum. But, it is worth noting annual the generation millions of times of blood collection needles human injury's accident that at present countries in the world hospital causes because of syringe needle fracture or medical personnel's misoperation. The statistics that American Medical Association announces shows, only the U.S. approximately occurs that 1,000,000 person-times of medical personnel are unexpected is stabbed accident by blood taking needle, the hepatitis B, hepatitis C virus and the AIDS viral infection that wherein have at least over thousands of people on syringe needle, to be adhered to every year. At every turn because the rupture medical personnel that stabbed and the emergency treatment expense of patient's generation of blood collection needles is 3000 dollars per capita.
The medical-risk that common blood taking needle causes can be lower than the medical-risk of syringe, and we can see in the near future to the beautiful method of safety blood taking. 2000, the former presidential Clinton of the U.S. signed a legal document<federal safety injector method>. This bill regulation, U.S.'s clinical medicine circle should adopt safety injector to replace the ordinary syringe product that has potential safety hazard as far as possible from now on.
Company drops into the research and development of safety blood taking medical equipment in succession energetically both at home and abroad, and safe blood-taking needle is in the market very many, and the situation of safety blood taking is opened, and has a Duan Henchang road to walk but will promote safety blood taking completely. These safety in the market just instrument for blood collection have a lot of deficiencies, and first production cost is very high; It two is complex manufacturing; Its three be the quality of production be difficult to ensure; It four is medical personnel's complex operations; Its 5 o'clock security functions are difficult to ensure.
Summary of the invention
The object of the invention is to for above-mentioned existing problems and deficiency, provide a kind of simple in structure, manufacture easily, production cost is low, the retraction type safe blood-taking needle that medical personnel are simple to operate, safe.
Technical scheme of the present invention is achieved in that
Retraction type safe blood-taking needle of the present invention, its feature is to comprise syringe needle and needle tubing, expansion sleeve pipe and core cylinder, wherein syringe needle is individually fixed in the front-end and back-end of core cylinder with needle tubing and is communicated with the core hole of core cylinder, described core cylinder is placed on slidably and expands in sleeve pipe, and core cylinder rear portion is provided with the elastic fastening plate with draw-in groove that can match with the buckle that expands sleeve pipe rear portion, core cylinder is fixed on to expand in sleeve pipe and syringe needle is stretched out in the snapping that expands sleeve pipe rear portion buckle by the draw-in groove of this elastic fastening plate and expands sleeve pipe front end.
Preferably, above-mentioned core cylinder external diameter is that the circle that matches or ellipse or bottom are that plane top is the combination shape of arc surface with expanding internal surface of sleeve pipe.
Preferably, more reliable during for further guarantee core cylinder and expansion sleeve pipe snapping, the anterior upper side wall of above-mentioned core cylinder is provided with the auxiliary cramp that can match with expansion sleeve pipe rear portion buckle, described core cylinder front end is provided with bulge loop, above-mentioned expansion sleeve pipe open rearward end portion is provided with indent stop block, by cooperation and bulge loop and the cooperation of stop block of described auxiliary cramp and buckle can make core cylinder in fallback procedures not can with expand sleeve pipe and separate.
Preferably, above-mentioned expansion sleeve pipe rear portion is the semi-circular cross-section that upper and lower length is different, and wherein above-mentioned buckle is arranged at the rear end of the semi-circular cross-section of growing on top, and above-mentioned indent stop block is arranged at the tail end of the shorter semi-circular cross-section in bottom.
Preferably, the anterior upper side wall of above-mentioned core cylinder is provided with the two auxiliary cramp that can match with expansion sleeve pipe rear portion buckle, and between two auxiliary cramps, be provided with the draw-in groove that can holding expands the buckle of sleeve pipe rear end, by described draw-in groove and the cooperation of buckle can make core cylinder in the process retreating not can with expand sleeve pipe and separate.
Preferably, on above-mentioned core drum outer wall, at least one side is provided with locating slot, expand internal surface of sleeve pipe correspondence and be provided with location card convex, by making this location card convex and coordinating of locating slot core cylinder steadily, reliable sliding sleeve, in expanding sleeve pipe, can not cause puncture failure because of the swing of syringe needle in blood collection procedure.
Preferably, the front-end and back-end of above-mentioned core cylinder are integrally formed with respectively connector, and above-mentioned needle apparatus is on the connector of core cylinder front end, and needle tube device is on core tube rear end connector.
Preferably, for being more conducive to medical personnel's operation, above-mentioned expansion outside of sleeve wall is provided with for operating and expand the handle of sleeve pipe for medical personnel, and this handle and buckle be not in same side direction.
The present invention is owing to adopting core cylinder and expanding the structure that sleeve pipe combines, medical personnel are in blood collection procedure, only the core wound packages that syringe needle is housed need to be placed in to expansion sleeve pipe, and make syringe needle stretch out in expansion sleeve pipe front end, and be fixed on reliably in expansion sleeve pipe with making core cylinder coordinating of expansion sleeve pipe buckle by the draw-in groove of core cylinder elastic fastening plate, being convenient to medical personnel takes a blood sample, and after blood sampling, the buckle that another hand departs from expansion sleeve pipe the draw-in groove on elastic fastening plate by the elastic fastening plate of depressing core cylinder rear portion just can safely and reliably and skid off core cylinder and syringe needle swimmingly backward, and coordinating of auxiliary cramp by core cylinder front portion and buckle and coordinating of core cylinder front end bulge loop and expansion sleeve pipe rear end indent stop block, thereby the syringe needle after blood sampling is hidden in reliably and is expanded in sleeve pipe, can facilitate and safely syringe needle after blood sampling be abandoned in garbage can, not only prevented that blood taking needle from stabbing medical personnel but also having prevented that blood taking needle from being utilized the object that reaches aseptic safety blood taking again, and the present invention is simple in structure, manufacture easily, production cost is low.
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Brief description of the drawings
Fig. 1 is state one structural representation of embodiment of the present invention I.
Fig. 2 is state two structural representations of embodiment of the present invention I.
Fig. 3 is the decomposition texture schematic diagram of embodiment of the present invention I.
Fig. 4 is the sectional structure schematic diagram of the state one of embodiment of the present invention I.
Fig. 5 is the sectional structure schematic diagram of the state two of embodiment of the present invention I.
Fig. 6 is state one structural representation of embodiment of the present invention II.
Fig. 7 is state two structural representations of embodiment of the present invention II.
Fig. 8 is the decomposition texture schematic diagram of embodiment of the present invention II.
Fig. 9 is the sectional structure schematic diagram of the state one of embodiment of the present invention II.
Figure 10 is the sectional structure schematic diagram of the state two of embodiment of the present invention II.
Figure 11 is the cross section structure schematic diagram of embodiment of the present invention II.
Figure 12 is state one structural representation of embodiment of the present invention III.
Figure 13 is state two structural representations of embodiment of the present invention III.
Figure 14 is the decomposition texture schematic diagram of embodiment of the present invention III.
Figure 15 is the sectional structure schematic diagram of the state one of embodiment of the present invention III.
Figure 16 is the sectional structure schematic diagram of the state two of embodiment of the present invention III.
Figure 17 is the cross section structure schematic diagram of embodiment of the present invention III.
Detailed description of the invention
As shown in Fig. 1-Figure 17, retraction type safe blood-taking needle of the present invention, comprise syringe needle 1 and needle tubing 2, expand sleeve pipe 3 and core cylinder 4, wherein syringe needle 1 is individually fixed in the front-end and back-end of core cylinder 4 with needle tubing 2 and is communicated with the core hole of core cylinder 4, described core cylinder 4 is placed on slidably and expands in sleeve pipe 3, and core cylinder 4 rear portions are provided with the elastic fastening plate with draw-in groove 42 41 that can match with the buckle 31 that expands sleeve pipe 3 rear portions, core cylinder 4 is fixed on to expand in sleeve pipe 3 and syringe needle 1 is stretched out in the snapping that expands sleeve pipe 3 rear portion buckles 31 by the draw-in groove 42 of this elastic fastening plate 41 and expands sleeve pipe 3 front ends. Preferably, above-mentioned core cylinder 4 external diameters are that the circle that matches or ellipse or bottom are that plane top is the combination shape of arc surface with expanding sleeve pipe 3 inwalls.
More reliable during for further guarantee core cylinder and expansion sleeve pipe snapping, the anterior upper side wall of above-mentioned core cylinder 4 is provided with the auxiliary cramp 43 that can match with expansion sleeve pipe 3 rear portion buckles 31, described core cylinder 4 front ends are provided with bulge loop 44, above-mentioned expansion sleeve pipe 3 open rearward end portions are provided with indent stop block 32, can make core cylinder 4 can not separate with expansion sleeve pipe 3 in fallback procedures by described auxiliary cramp 41 with the cooperation of buckle 31 with bulge loop 44 and the cooperation of stop block 32. Above-mentioned expansion sleeve pipe 3 can be both the smooth structure of end face as shown in Figures 1 to 5, also can be the structure differing in the upper and lower end face as shown in Fig. 6 to Figure 11, now, above-mentioned expansion sleeve pipe 3 rear portions are the semi-circular cross-section that upper and lower length is different, wherein above-mentioned buckle 31 is arranged at the rear end of the semi-circular cross-section of growing on top, and above-mentioned indent stop block 32 is arranged at the tail end of the shorter semi-circular cross-section in bottom.
Preferably, as shown in Figure 12-Figure 17, the anterior upper side wall of above-mentioned core cylinder 4 is provided with the two auxiliary cramp 43 that can match with expansion sleeve pipe 3 rear portion buckles 31, and between two auxiliary cramps, be provided with the draw-in groove 46 that can holding expands the buckle 31 of sleeve pipe 3 rear ends, by described draw-in groove 46 and the cooperation of buckle 31 can make core cylinder 4 in the process retreating not can with expand sleeve pipe 3 and separate. Preferably, on above-mentioned core cylinder 4 outer walls, at least one side is provided with locating slot 47, expand sleeve pipe 3 inwall correspondences and be provided with location card convex 35, by making this location card convex 35 and coordinating of locating slot core cylinder 4 steadily, reliable sliding sleeve, in expanding sleeve pipe 3, can not cause puncture failure because of the swing of syringe needle in blood collection procedure.
The front-end and back-end of above-mentioned core cylinder 4 are integrally formed with respectively connector 45, and above-mentioned syringe needle 1 is installed on the connector 45 of core cylinder 4 front ends, and needle tubing 2 is installed on the rear end connection 45 of core cylinder 4. For being more conducive to medical personnel's operation, above-mentioned expansion sleeve pipe 3 lateral walls are provided with for operating for medical personnel and expand the handle 33 of sleeve pipe 3, and this handle 33 with buckle 31 not in same side direction.
The present invention is owing to adopting core cylinder 4 and expanding the structure that sleeve pipe 3 combines, medical personnel are in blood collection procedure, only the core cylinder 4 that syringe needle 1 is housed need to be installed on and expand sleeve pipe 3, and make syringe needle 1 stretch out in expansion sleeve pipe 3 front ends, and draw-in groove 42 by core cylinder 4 elastic fastening plates 41 core cylinder 4 is fixed on reliably and expands in sleeve pipe 3 with expanding coordinating of sleeve pipe 3 buckles 31, being convenient to medical personnel takes a blood sample, and after blood sampling, the buckle 31 that another hand departs from expansion sleeve pipe 3 draw-in groove 42 on elastic fastening plate 41 by the elastic fastening plate 41 of depressing core cylinder 4 rear portions just can safely and reliably and skid off core cylinder 4 and syringe needle 1 swimmingly backward, and coordinating of auxiliary cramp 43 by core cylinder 4 front portions and buckle 31 and coordinating of core cylinder 4 front end bulge loops 44 and expansion sleeve pipe 3 rear end indent stop blocks 32, thereby the syringe needle 1 after blood sampling is hidden in reliably and is expanded in sleeve pipe 3, can facilitate and safely syringe needle 1 after blood sampling be abandoned in garbage can, not only prevented that blood taking needle from stabbing medical personnel but also having prevented that blood taking needle from being utilized the object that reaches aseptic safety blood taking again, and the present invention is simple in structure, manufacture easily, production cost is low.
The present invention describes by embodiment, but the present invention is not construed as limiting, with reference to description of the invention, other variations of the disclosed embodiments, as the professional person for this area easily expects, within such variation should belong to the scope of the claims in the present invention restriction.