CN103083767A - Improved-type positive-pressure-retraction-type safe injector - Google Patents
Improved-type positive-pressure-retraction-type safe injector Download PDFInfo
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- CN103083767A CN103083767A CN 201310057218 CN201310057218A CN103083767A CN 103083767 A CN103083767 A CN 103083767A CN 201310057218 CN201310057218 CN 201310057218 CN 201310057218 A CN201310057218 A CN 201310057218A CN 103083767 A CN103083767 A CN 103083767A
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Abstract
Disclosed is an improved-type positive-pressure-retraction-type safe injector. The improved-type positive-pressure-retraction-type safe injector is composed of a guard sleeve, a sealing gasket, a needle tubing, a needle seat, a damping ring, a piston, a pushing rod and an outer barrel. The sealing gasket ensures that an air-tight seal is formed between the connection portion of the front segment and the middle segment of the needle seat and an inner hole of a cone head of the outer barrel. The inner diameter of the damping ring is slightly smaller than the outer diameter of the rear segment of the needle seat but is larger than the outer diameter of the middle segment of the needle seat. The damping ring is sleeved on the bottom of the lower end of the needle seat and then is arranged inside the front end of the outer barrel to ensure that air-liquid seal is formed among the needle seat, the damping ring and the outer barrel. An annular groove is arranged on the surface of the piston. The diameter of the piston is slightly larger than the inner diameter of the outer barrel. The piston and the pushing rod are arranged inside the inner cavity of the outer barrel and are tightly matched with the inner wall of the outer barrel in a sliding mode. After injection is conducted, a user continues squeezing the pushing rod; the surface of the piston can be cut into a window by a sharp skirt edge of the lower end of the needle seat and a sharp edge of an inner hole of the pushing rod; the pushing rod ensures that the damping ring moves forwards to compress air in the inner cavity of the front segment of the outer barrel; when the damping ring moves forwards to the middle segment of the needle seat, the needle seat is released, compressed air ejects the needle seat needle into the inner cavity of the pushing rod, the window of the piston is recovered to ensure that the needle is shielded and can not be exposed outwards. The improved-type positive-pressure-retraction-type safe injector has the advantages of being simple, practical, low in cost, safe and reliable.
Description
(1), technical field
The present invention relates to a kind of medical apparatus and instruments, be used for specifically to the piercing process of tissue and after puncture to organizing inner injecting and administering or extracting the modified model malleation retractable safety injector of tissue specimen.
(2), background technology
Chinese patent application numbers 201210221311.1 has been announced vapour-pressure type retraction self-destroyed syringe, comprise injection tube, the hollow injection rod of tubular, needle stand, sealing gasket, piston and seal nipple, the central authorities of needle stand are provided with syringe needle, needle stand is arranged on the front end of injection tube by the sealing gasket that is sleeved on its lower end, piston bush is located at the outside of injection rod front end, seal nipple is arranged on the interior survey of injection rod front end, seal nipple and needle stand are provided with the syndeton of working in coordination, it is characterized in that: when described injection rod is pushed into the front end of described injection tube, the outer wall hermetic seal of the inwall of injection tube front end and needle stand front end, be provided with prevention seal nipple and needle stand on the injection rod inwall from the stopping means of injection rod lower end ejaculation, the injection rod lower end is provided with the steam vent of linking up injection rod inner chamber and the external world.The bottom of described needle stand outwards convexes to form limit base, and sealing gasket is sleeved on limit base and makes the needle stand outer wall and the hermetic seal of injection tube inwall; Described stopping means has two, is separately positioned on injection rod middle part and bottom, and stopping means is exactly three road convex tendons on the injection rod inwall.
though this technical scheme mechanical force (spring force or artificial pulling force) of utilizing more in the past has than much progress self-destruction or the safety injector of needle stand and needle tubing retraction, but still have the following disadvantages: 1., needle stand front end and injection tube front end rely on the inclined-plane and are when injection rod is pushed into the injection tube front end, utilize injection rod to the pressure of needle stand and outer cylinder front end inwall, make and both form sealing, the method is in moulding in enormous quantities carries out the process of suitability for industrialized production, there is the mutual error of part dimension, above-mentioned sealing is existed uncertain, it is not exclusively reliable that sealing becomes, the air compressing degree of injection tube front end inner chamber is reduced, atmospheric pressure reduces, can not realize that needle stand is launched retraction, 2., in this scheme, what the needle stand lower lobes formed is limit base, is only to coordinate with sealing gasket, completes the hermetic seal between needle stand and injection tube inwall, spacing needle stand, make its can not after move.There is no explanation in literary composition: limit base will have certain length, make sealing gasket under the surface of limit base can the extruding at injection rod, during slipper seal, the reach certain distance, complete the seal compression to injection tube front end inner chamber air, generation makes needle stand and seal nipple launch needed certain pressure intensity (kinetic energy) to the push rod inner chamber.So, the description of technique scheme, only in the middle part of sealing gasket is advanced to needle stand from limit base, this distance is difficult to realize needed pressure to the compression of injection tube front end inner chamber air, especially the syringe of small dimension (less than 1.0ml), its injection tube intracavity diameter is less than 4.0mm, and general sealing gasket thickness is 2-3.0mm approximately; Compression distance so, atmospheric pressure is extremely faint, is the needs that can not realize such scheme described needle stand retraction; 3., because this scheme has been utilized needle stand lower end endoporus and the interconnective structure of seal nipple front end plug, the side makes and both drives needle tubing and bounce back together and enter the injection rod inner chamber; Due to the connection space that exists between needle stand endoporus and seal nipple, make drug residue increase, especially valuable drug, can cause drug waste and curative effect to reduce; 4., because this scheme is to utilize the interaction of the three road convex tendons at middle part and bottom in the bottom margin of seal nipple and injection rod, realize spacing to syringe needle it being penetrated from the injection rod lower end, simultaneously can not be by exposing in the injection rod upper end hole.Above-mentioned the 1. because this scheme exists, the 2. deficiency or defective, make its retraction uncertain, especially during the small dimension injection tube, retraction not just; So syringe needle, needle stand and seal nipple together bounce back (ejaculation) may: not exclusively enter the injection rod inner chamber, be that syringe needle and needle stand and seal nipple fail to be penetrated, retract between two stopping means by enough compressed airs, so, needle point just can not enter the injection rod inner chamber fully, and continue to expose, there is the risk of needle stick injury.
(3), summary of the invention
In order to overcome the deficiency of such scheme, the object of the present invention is to provide the structure after improvement simpler, cost is lower, safe and reliable, practicality is good, can realize that automatization produces in enormous quantities, and be the modified model malleation retractable safety injector that numerous medical personnel accept.
To achieve these goals, technical scheme of the present invention is such: modified model malleation retractable safety injector is made of jointly sheath, sealing gasket, needle tubing, needle stand, damped ring, piston, push rod, urceolus; It is characterized in that: be provided with sealing gasket between the appearance of needle stand leading portion and urceolus leading portion conehead endoporus, make needle stand leading portion and junction, stage casing and urceolus conehead endoporus form hermetic seal; Damped ring is sleeved on the lower end of needle stand back segment and the sharp keen shirt rim that the flare of its bottom is expanded is wrapped up fully, then together is arranged in the front end inner chamber of urceolus, makes between needle stand, damped ring, urceolus and forms gas-liquid sealing; The space of urceolus leading portion is sealed fully; Piston is cap-like structure, and its upper end face has a ring-shaped groove, and there are two annular protrusions its side, the slightly larger in diameter of annular protrusion is in the internal diameter of urceolus, piston is arranged on the front end outside of push rod, and push rod and piston are arranged on outer tube inner chamber, and being between piston and outer tube inner wall slides closely cooperates.
The leading portion external diameter of needle stand is slightly less than outer cylinder front end conehead diameter of bore; Needle stand stage casing external diameter is greater than the internal diameter of outer cylinder front end taper hole, needle stand back segment external diameter is greater than the external diameter in needle stand stage casing, the length of needle stand back segment is more than 2 times of damped ring thickness, the bottom of needle stand back segment is horn-like expansion and forms sharp keen shirt rim, and the diameter of described sharp keen shirt rim equals the diameter of piston face ring-shaped groove; One side of described sharp keen shirt rim is cut, and the action (D-R) that is cut part equals or be slightly larger than the thickness of piston face.
Push rod is the hollow stem structure, its upper end endoporus perisporium is sharpened edge ringwise, and its slightly larger in diameter is in the diameter of the ring-shaped groove of piston upper end face, in the outside of push rod upper end, 1-2 annular protrusion is arranged, can be with piston and closely cooperate, the degree of depth of push rod inner chamber is greater than the summation of needle stand and needle tubing length; The expansion of push rod lower end is tabular, and its central authorities have aperture and upper end endoporus to connect.
Described urceolus is hollow structure, and its front end has the conehead that dwindles, and there is taper hole in its central authorities, and the leading portion internal diameter of urceolus is slightly less than the internal diameter of urceolus posterior segment; Urceolus leading portion and intersection, stage casing are slightly larger than the summation of needle stand back segment and middle segment length to the distance of outer cylinder front end taper hole inwall; The length of urceolus leading portion equals or is slightly larger than the summation of segment length and damped ring thickness after needle stand.
Needle stand is arranged in the front end inner chamber of urceolus, and needle stand stage casing and hypomere junction are to the distance P of the outer cylinder front end inwall thickness greater than damped ring; The length of needle stand back segment is more than 2 times of damped ring thickness.
Damped ring is the ring of being made by elastic plastic material, its internal diameter be slightly less than the needle stand back segment external diameter but greater than the external diameter in needle stand stage casing; The external diameter of damped ring is slightly larger than the internal diameter of urceolus leading portion.The needle stand back segment is inlaid in the endoporus of damped ring, and damped ring forms sealing and build-in between outer tube inner wall and needle stand appearance, and this build-in force (frictional resistance) is greater than 10N, to satisfy the non-return power requirement to entry needle; The thickness of damped ring is more than 2.0mm, and its internal diameter is slightly less than the external diameter of needle stand back segment, but greater than the external diameter in needle stand stage casing, the external diameter of damped ring is slightly larger than the internal diameter of urceolus leading portion.
The present invention has following technical characterictic and technological progress:
Because the present invention has adopted after liquid medicine injection is complete, continue pressure-ram and make damped ring section surface reach after needle stand, compression urceolus leading portion inner chamber air, and at the whole latter end of compression, make damped ring be advanced to needle stand stage casing (because of its diameter less than the damped ring internal diameter), the sudden outburst needle stand makes it under compressed-air actuated effect, rapidly directive push rod inner chamber; Make the technical program utilize spring and the scheme such as manually pull back, have characteristics simple in structure, with low cost, easy to manufacture.
because the present invention adopts the sharp keen shirt rim of needle stand bottom expansion and the ring-shaped groove that push rod endoporus front end sharpened edge is interacting at piston face, and because the sharp edge shirt rim of needle stand bottom is cut a part, above effect can cut at the ring-shaped groove place of piston face one can opening and closing window, needle stand is under the push rod effect, pass and window, and under the compressed air effect, the needle stand needle tubing is launched into rapidly the push rod inner chamber, then after the air pressure balance, the piston nature of windowing recovers closed condition, needle tubing is closed in the push rod inner chamber, it can not be exposed again.Make the present invention have retraction reliably, definite, the simple in structure characteristics of shielding needle tubing.
The piston of the technical program and needle stand, damped ring are in plane contact, no longer need seal nipple and needle stand to link, and the structure of tractive needle stand makes this programme have simple in structure, and the characteristics that the liquor residue amount is few make the medicinal liquid utilization rate improve, and curative effect increases.
The technical program is easy to manufacture, and is safe and reliable, implement simply, widely applicable, is beneficial to universal.After use, can realize that the device pin unmakes, the needle point shielding, eliminate needle stick injury, avoid medical personnel and other staff are infected and spread disease by pricking wound.
(4), description of drawings
Fig. 1 is that the integral body of modified model malleation retractable safety injector of the present invention consists of decomposing schematic representation;
Fig. 2 is the structural representation of the needle stand of modified model malleation retractable safety injector of the present invention;
Fig. 3 is the structural representation of the piston of modified model malleation retractable safety injector of the present invention;
Fig. 4 is the structural representation of the push rod of modified model malleation retractable safety injector of the present invention;
Fig. 5 is the structural representation of the urceolus of modified model malleation retractable safety injector of the present invention;
Fig. 6 is the overall structure schematic diagram of modified model malleation retractable safety injector of the present invention;
Fig. 7 is that modified model malleation retractable safety injector of the present invention is complete in injection, and continuation pressure-ram, needle stand enter the push rod inner chamber, and cut formation of piston windowed, the damped ring reach, and the outer cylinder front end air is compressed, the structural representation when needle stand is about to discharge;
Fig. 8 is modified model malleation retractable safety injector of the present invention after compressed air discharges, and makes needle stand, needle tubing be fired to the push rod inner chamber, and piston is windowed and recovered needle tubing restriction, the shielding structural representation at the push rod inner chamber.
(5), specific embodiment
As shown in Figure 1, modified model malleation retractable safety injector of the present invention by: sheath 0, sealing gasket 01, needle tubing 1, needle stand 2, damped ring 3, piston 4, push rod 5, urceolus 6 form jointly.Sheath 0 can be sleeved on the conehead appearance of urceolus 6 front ends, is not damaged with the cutting edge that protects needle tubing; Needle tubing 1 is the tubular structure that stainless steel material is made, one end has sharp cutting edge 11, sealing gasket 01 is the packing ring that elastomeric material is made, damped ring 3 is cycle objects of being made by elastic plastic material, needle stand 2 is column structures, there is through hole in central authorities, piston 4 be plastic material make have certain elastic cap-like structure; Push rod 5 is hollow tubular structures, and urceolus 6 is hollow tubular.
Fig. 2 is the structural representation of the needle stand of modified model malleation retractable safety injector of the present invention; Referring to Fig. 2-1. with Fig. 2-2., needle stand 2 is column structures, there is through hole 20 in central authorities, and leading portion 21 external diameters of needle stand 2 are slightly less than urceolus 6 front end taper hole 61 internal diameters; Stage casing 22 external diameters of needle stand 2 are greater than the external diameter of needle stand leading portion 21, and back segment 23 external diameters of needle stand 2 are greater than the external diameter in needle stand stage casing 22.The bottom of needle stand back segment 23 outwards is horn-like expansion and forms sharp keen shirt rim 24, and the diameter D of shirt rim 24 equals the diameter W of the ring-shaped groove of piston face.One side of sharp keen shirt rim 24 is cut, and the action (D-R) that is cut part equals or be slightly larger than the thickness of piston 4 upper end faces.
Fig. 3 is the structural representation of the piston of modified model malleation retractable safety injector of the present invention; As seen from the figure, piston 4 be plastic material make have certain elastic cap-like structure, upper end face at piston, one ring-shaped groove 41 is arranged, its diameter W equals the diameter D that needle stand 2 back segments bottoms are the sharp keen shirt rim 24 of loudspeaker expansion, 2 annular protrusions 42 are arranged in the outside of piston 4, and its external diameter is slightly larger than the internal diameter of urceolus 6.
Fig. 4 is the structural representation of the push rod of modified model malleation retractable safety injector of the present invention; As seen from the figure, push rod 5 is a hollow structure, and its upper end appearance has two annular protrusions 52, can match chimeric with piston 4 endoporus; In the inside attenuation 51 in edge of the front end perforate of push rod 5, comparatively sharp keen, the peritreme slightly larger in diameter of formation is the diameter of the sharp keen shirt rim 24 of horn-like expansion in needle stand back segment 23 bottoms.The degree of depth of push rod endoporus 53 is greater than the summation of needle stand and needle tubing length; The push rod lower end has an aperture 55 and push rod upper end endoporus to connect, and the push rod lower end is expanded in the form of sheets, becomes and injects handle 54.
Fig. 5 is the outer tube structure schematic diagram of modified model malleation retractable safety injector of the present invention; As seen from the figure, urceolus 6 is hollow structure, and its front end has a conehead 62, has taper hole 61 and urceolus 6 inner chambers to connect at the front end of conehead; The internal diameter of the leading portion 63 of urceolus is slightly less than the internal diameter of urceolus 6 stage casings and back segment, and urceolus leading portion and junction, stage casing 64 equal or be slightly larger than the summation of needle stand stage casing 22 and needle stand back segment 23 length to the length of urceolus conehead endoporus; The length of urceolus leading portion 63 is equal to or greater than the summation of needle stand back segment 23 and damped ring 3 length, should be more than 3 times of damped ring 3 thickness at least.The internal diameter of the posterior segment inner chamber 65 of urceolus 6 is slightly less than the external diameter of piston 4; The curling operating grip 66 that becomes of back segment outer wall expansion of urceolus 6.
Fig. 6 is the overall structure schematic diagram after modified model malleation retractable safety injector assembling of the present invention; As seen from the figure, needle tubing 1 is bonded in the front end endoporus 20 of needle stand 2, and sealing gasket 01 is sleeved between leading portion 21 appearances and urceolus 6 front end conehead endoporus 61 of needle stand 2, makes between the leading portion of needle stand 2 and junction, stage casing and urceolus taper hole 61 and forms hermetic seal.Damped ring 3 is sleeved on the back segment 23 bottom appearances of needle stand 2, and also parcel fully of the sharp keen shirt rim 24 that needle stand 2 bases are horn-like expansion, then together be arranged on the junction 64 in urceolus 6 leading portions and stage casing with needle stand 2, make needle stand 2 back segments, damped ring 3 and urceolus 6 posterior segments formation gas-liquid sealings; Equally, urceolus 6 leading portion 63 inner chambers, namely the space of the leading portion appearance 21 of outer cylinder front end inwall and needle stand 2 and 23 formation of back segment appearance is in complete sealing state; Piston 4 is sleeved on the front end appearance of push rod 5, then is installed in urceolus 6 inner chambers.Needle stand 2 is arranged in the inner chamber of urceolus 6 leading portions 63, and the distance P of urceolus leading portion inwall front end is arrived greater than the thickness of damped ring 3 in the junction of needle stand stage casing 22 and back segment 23; The length N of needle stand back segment 23 is more than 2 times of damped ring thickness.Needle stand back segment 23 is inlaid in the endoporus of damped ring 3, and damped ring 3 forms sealing and build-in between urceolus 6 inwalls and needle stand back segment 23 appearances, and this build-in force (frictional resistance) is greater than 10N, to satisfy the non-return power requirement to injection needle 2.Urceolus leading portion and intersection, stage casing are slightly larger than the summation of needle stand back segment and middle segment length to the distance of outer cylinder front end taper hole inwall; The length of urceolus leading portion 63 is slightly larger than the summation of needle stand back segment 23 length N and damped ring 3 thickness.
In use, conventional according to injection, after local tissue disinfection, extract medicinal liquid, after deaeration, puncture in local organization in accordance with doctor's advice, mutual pressure-ram and urceolus handle, liquid medicine injection is until injecting liquid drug is complete.
referring to Fig. 7 and Fig. 8, when modified model malleation retractable safety injector of the present invention the injection complete after, continue pressure-ram 5, the sharp keen shirt rim 24 of needle stand back segment and push rod front end endoporus sharp edge 51 are interacting at the ring-shaped groove 41 of piston 4 upper surfaces, can be with piston 4 cut the splitting in ring-shaped groove 41 places, because the tubaeform sharp keen shirt rim 24 on needle stand 2 bases has a side to be cut disappearance, 41 to keep a place cut at the ring-shaped groove place will to make piston 4, ring-shaped groove is cut into window 42, needle stand 2 passes to window and 42 enters push rod 5 front end inner chambers, damped ring 3 is in the reach of the surface of needle stand 2 back segments 23 simultaneously, the urceolus 6 interior air of leading portion 63 are compressed, along with the continuation of push rod 5 extruding, damped ring 3 reaches, needle stand back segment 23 enters push rod endoporus 53, and piston is windowed and is translated into push rod endoporus depths in 42 places, and needle stand 2 is not reconstructed obstruction, when damped ring 3 was expressed to the stage casing 22 of needle stand 2 fully, due to the external diameter in needle stand stage casing 22 internal diameter less than damped ring 3, needle stand 2 had lost the fixing and constraint of damped ring 3 to it.Referring to Fig. 8, under the urceolus 6 compressed-air actuated effects of leading portion inner chamber 63, needle stand 2 and needle tubing 1 discharge rapidly, are fired to the depths 53 of push rod 5 inner chambers, needle stand 2 and needle tubing 1 enter push rod inner chamber 53 fully, at this moment, due to 42 effects that lost air pressure and needle stand 2 of windowing of piston 4, the inherent character of its elastomeric material, 42 parts of windowing are recovered naturally near original state, can stop needle tubing and can not again expose, needle tubing is shielded in push rod inner chamber 53, having eliminated the risk of needle stick injury.
Technical scheme described in the invention by any similar distortion that distortion can realize, all will fall into technology category of the present invention at those skilled in the art.
Claims (6)
1. modified model malleation retractable safety injector, be made of jointly sheath (0), sealing gasket (01), needle tubing (1), needle stand (2), damped ring (3), piston (4), push rod (5), urceolus (6); It is characterized in that: be provided with sealing gasket (01) between the appearance of needle stand (2) leading portion (21) and urceolus (6) front end conehead endoporus (61), make needle stand leading portion (21) and (22) junction, stage casing and urceolus (6) front end conehead endoporus (61) form hermetic seal; Damped ring (3) is sleeved on the lower end of needle stand (2) back segment and the sharp keen shirt rim (24) that the flare of its bottom is expanded is wrapped up fully, then together be arranged in the front end inner chamber (63) of urceolus (6), make needle stand (2), damped ring (3), urceolus form gas-liquid sealing between (6), the space of urceolus leading portion (63) is sealed fully; Piston (4) is cap-like structure, its upper end face has a ring-shaped groove (41), there are two annular protrusions (42) its side, the slightly larger in diameter of annular protrusion (42) is in the internal diameter of urceolus (6), piston (4) is arranged on the front end outside of push rod (5), push rod (5) and piston (4) are arranged on urceolus (5) inner chamber, and being between piston (4) and urceolus (6) inwall slides closely cooperates.
2. modified model malleation retractable safety injector according to claim 1, it is characterized in that: epimere (21) external diameter of needle stand (2) is slightly less than outer cylinder front end conehead endoporus (61) diameter; Needle stand stage casing (22) external diameter is greater than the internal diameter of outer cylinder front end taper hole, needle stand back segment (23) external diameter is greater than the external diameter in needle stand stage casing (22), the length of needle stand back segment (23) is more than 2 times of damped ring (3) thickness, the bottom of needle stand back segment (23) is horn-like expansion and forms sharp keen shirt rim (24), and the diameter (24) of described sharp keen shirt rim (24) equals the diameter of the surperficial ring-shaped groove of piston (4) (41); One side of described sharp keen shirt rim (24) is cut, and the action (D-R) that is cut part equals or be slightly larger than the thickness of piston (4) upper end face.
3. modified model malleation retractable safety injector according to claim 1, it is characterized in that: described push rod (5) is the hollow stem structure, its upper end endoporus perisporium is sharpened edge (51) ringwise, its slightly larger in diameter is in the diameter of the ring-shaped groove (41) of piston (4) upper end face, there is 1-2 annular protrusion (52) in the outside in push rod (5) upper end, can be with piston (4) and closely cooperate, the degree of depth of push rod (5) inner chamber is greater than the summation of needle stand (2) with needle tubing (1) length; The expansion of push rod lower end is tabular (54), and its central authorities have aperture (55) and push rod endoporus to connect.
4. modified model malleation retractable safety injector according to claim 1, it is characterized in that: described urceolus (6) is hollow structure, its front end has the conehead (62) that dwindles, there is taper hole (61) in its central authorities, and leading portion (63) internal diameter of urceolus (6) is slightly less than the internal diameter of urceolus posterior segment (65); Urceolus leading portion and intersection, stage casing (64) are slightly larger than the summation of needle stand (2) back segment (23) and stage casing (22) length to the distance of outer cylinder front end taper hole (61) inwall; The length of urceolus leading portion (63) equals or is slightly larger than the summation of needle stand back segment (23) length and damped ring (3) thickness.
5. modified model malleation retractable safety injector according to claim 1, it is characterized in that: needle stand is arranged in the front end inner chamber of urceolus, and needle stand stage casing and hypomere junction are to the distance P of the outer cylinder front end inwall thickness greater than damped ring (3); The length of needle stand back segment (23) is more than 2 times of damped ring (3) thickness.
6. modified model malleation retractable safety injector according to claim 1, it is characterized in that: damped ring (3) is the ring of being made by elastic plastic material, the thickness of damped ring (3) is 2, more than 0mm, its internal diameter is slightly less than the external diameter of needle stand back segment (23), but greater than the external diameter in needle stand stage casing (22), the external diameter of damped ring (3) is slightly larger than the internal diameter of urceolus (6) leading portion (63); Needle stand back segment (23) is inlaid in the endoporus of damped ring (3), damped ring (3) forms sealing and build-in between urceolus (6) inwall and needle stand (2) appearance, this build-in force (frictional resistance) is greater than 10N, to satisfy the non-return power requirement to entry needle.
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| CN 201310057218 CN103083767A (en) | 2013-02-21 | 2013-02-21 | Improved-type positive-pressure-retraction-type safe injector |
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| CN 201310057218 CN103083767A (en) | 2013-02-21 | 2013-02-21 | Improved-type positive-pressure-retraction-type safe injector |
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| CN103285457A (en) * | 2013-05-28 | 2013-09-11 | 江波 | Air compression core bar structure of self-destroying syringe |
| CN111565776A (en) * | 2018-01-26 | 2020-08-21 | 贝克顿·迪金森公司 | Flushing syringe with turnover cap |
| WO2021147840A1 (en) * | 2020-01-21 | 2021-07-29 | 贝普医疗科技有限公司 | Spring-back syringe having shielding needle eccentric baffle |
| CN113504082A (en) * | 2021-09-13 | 2021-10-15 | 南京阳图医疗科技有限公司 | Sampling device for detecting quality spectrum of hormones and vitamins in blood |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103285457A (en) * | 2013-05-28 | 2013-09-11 | 江波 | Air compression core bar structure of self-destroying syringe |
| CN111565776A (en) * | 2018-01-26 | 2020-08-21 | 贝克顿·迪金森公司 | Flushing syringe with turnover cap |
| US11944792B2 (en) | 2018-01-26 | 2024-04-02 | Becton, Dickinson And Company | Flush syringe with flip cap |
| US12076522B2 (en) | 2018-04-10 | 2024-09-03 | Becton, Dickinson And Company | Universal single-use cap for male and female connectors |
| US11975168B2 (en) | 2019-11-18 | 2024-05-07 | Becton, Dickinson And Company | Disinfectant cap |
| US11890445B2 (en) | 2019-12-23 | 2024-02-06 | Becton, Dickinson And Company | Universal disinfection cap |
| WO2021147840A1 (en) * | 2020-01-21 | 2021-07-29 | 贝普医疗科技有限公司 | Spring-back syringe having shielding needle eccentric baffle |
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Application publication date: 20130508 |