CN105214181A - Safety injector and needle body needle stand pumpback device thereof - Google Patents
Safety injector and needle body needle stand pumpback device thereof Download PDFInfo
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- CN105214181A CN105214181A CN201410316830.5A CN201410316830A CN105214181A CN 105214181 A CN105214181 A CN 105214181A CN 201410316830 A CN201410316830 A CN 201410316830A CN 105214181 A CN105214181 A CN 105214181A
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- needle stand
- airtight
- plug
- needle
- ring
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- 238000009434 installation Methods 0.000 claims abstract description 20
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 239000003814 drug Substances 0.000 claims description 59
- 230000000903 blocking effect Effects 0.000 claims description 20
- 230000015572 biosynthetic process Effects 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 13
- 239000007799 cork Substances 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 125000003003 spiro group Chemical group 0.000 claims description 5
- 229940079593 drug Drugs 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 208000012266 Needlestick injury Diseases 0.000 description 1
- 238000001467 acupuncture Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 210000000873 fovea centralis Anatomy 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The present invention discloses a kind of safety injector and needle body needle stand pumpback device thereof, and safety injector mainly includes a cylindrical shell, a pushing piece, a pumpback part and a syringe needle group; This cylindrical shell is hollow cylindrical body and has a syringe needle group installation end and an operation holding end respectively, and form a chamber in this inner barrel, be arranged at this intracavity this pushing piece pullable, and form a push rod chamber in the inside of this pushing piece, this pumpback part airtightly can be arranged at this push rod chamber slippingly, and this syringe needle group correspondence is arranged at this syringe needle group installation end; The present invention can make the inside of this pushing piece form vacuum state by this pumpback part, and after injection completes, discarded syringe needle group pumpback after using is entered this push rod intracavity, to reach the object of this syringe of safe disposal by the pull of vacuum by this pushing piece inside.
Description
Technical field
The present invention relates to a kind of medical supplies, particularly relate to a kind of safety injector.
Background technology
Used syringe has the careless contaminated needle sticks of healthcare givers often at time trocar lid clinically, and the thunder bolt causing pinprick to infect, syringe is usually after use, after needle body all must return trocar lid, and lose into collecting vessel according to regulation or concentrate destruction, again occur to avoid similar situation.
In order to improve the safety problem that existing syringe uses, inventor's hammer away has also applied for variation and the injector designed innovated, by the structure of inner barrel, used needle body pumpback can be entered after injection to inner barrel and receive and keep, reduce user and touch the chance polluting needle body, and then it is frightened to reduce the psychology of medical personnel when using syringe.
But, inventor does not still meet the utilization of prior art, still continue to exert one's heart and strength to the utmost to be devoted to that safety injector is technical to progress greatly, and developmental research can simplify internal structure and technique with great concentration, and increase the innovative techniques of safety in utilization, stability, smoothness, and then medical skill is made to be promoted to higher boundary.
Summary of the invention
The present invention more simplifies to propose internal structure, and be easy to manufacture process and operate the medical syringe used, and main purpose of the present invention is to provide a kind of safety injector and needle body needle stand pumpback device thereof, it causes the pushing piece being positioned at inner barrel can form low pressure space, pole by pumpback part, the effect of being transmitted by external atmospheric pressure is drawn needle head group back and forth, promotes the safety of use and reaches the object of simplifying structure and manufacturing simultaneously.
The technological means that the present invention uses is to provide a kind of safety injector, comprising:
One cylindrical shell, it is a hollow cylindrical body, and there is a Large Diameter Pipeline section and be positioned at this Large Diameter Pipeline section front end and the pipe with small pipe diameter section forming gradually-reducing shape, the one end connecting this pipe with small pipe diameter section in the Large Diameter Pipeline section of this cylindrical shell is defined as a syringe needle group installation end, and be oppositely defined as an operation holding end away from one end of this syringe needle group installation end, then form a chamber in the inside of this Large Diameter Pipeline section, the ring wall projection being adjacent to this syringe needle group installation end in this intracavity is formed with a blocking bulge loop;
One pushing piece, it airtightly can be arranged at the cylinder chamber of this cylindrical shell slippingly, and includes:
One movable push bar, its have a hollow push rod chamber, one can slippage in this intracavity and interior caliber pushes end and in the medicament slightly reducing shape extend to operating side outside this chamber;
Airtight gear plug in one, it is equipped in the push rod intracavity that this medicament pushes end airtightly;
One exogenous QI crammed plug, itself and the medicament of this movable push bar push hold and this interior airtight keep off filling in mutually airtightly to engage, and can slippage airtightly in this intracavity;
One end cap, it is fastened in the operating side of this movable push bar, and have one run through by end cap central shield and sustain pipe;
One pumpback part, it airtightly can be arranged at the push rod chamber of this movable push bar slippingly, this pumpback part includes a pull bar and an airtight plug sleeve, this draws and passes outside this push rod chamber with a holding end by the pipe of shielding and sustain of this end cap, and engage this airtight plug sleeve with a reverse block end and stretch into this push rod intracavity, make this airtight plug sleeve fit in this interior airtight gear plug;
One syringe needle group, its correspondence is installed on the syringe needle group installation end of this cylindrical shell, and include a needle body, needle stand and be sheathed on outside this needle body and be sheathed on needle stand retainer ring outside this needle stand, this needle stand is arranged at the cylinder intracavity of this syringe needle group installation end, and shielded and sustain in this pipe with small pipe diameter section with front end, this needle stand retainer ring is sticked in the blocking bulge loop in this Large Diameter Pipeline section, the rearward end of this needle stand forms a fitting portion, and this needle stand is with this fitting portion correspondence and concavo-convex blocking is incorporated into airtight gear plug in this pushing piece;
This this pull bar of pumpback part mat pulls back displacement airtightly in this movable push bar, this airtight plug sleeve of mat removes the air of this push rod intracavity, and be equipped in the rear end of this movable push bar, this movable push bar inside is made to form a low pressure space, pole, and after drug injection completes, the needle stand retainer ring of this this syringe needle group of pushing piece driven forward of mat, this needle stand retainer ring is made to depart from the blocking bulge loop of this needle stand and this cylindrical shell, make in this needle stand and this movable push bar of the synchronous immigration of this interior airtight gear plug, and by the atmospheric pressure in the external world, this interior airtight gear plug is pushed in this movable push bar in conjunction with this needle stand and this needle body, use generation safety, the effect of automatic drawing back needling body.
The technological means that the present invention uses is the needle body needle stand pumpback device providing a kind of safety injector, comprising:
One pushing piece, it airtightly can be arranged at an intracavity of a cylindrical shell of a syringe slippingly, and includes airtight gear plug, an exogenous QI crammed plug and an end cap in a movable push bar; Wherein, this movable push bar have a hollow push rod chamber, one can slippage in this intracavity and interior caliber pushes end and in the medicament slightly reducing shape extend to operating side outside this chamber, this interior airtight gear plug is equipped in the push rod intracavity that this medicament pushes end airtightly, this exogenous QI crammed plug and the medicament of this movable push bar push hold and this interior airtight keep off filling in mutually airtightly to engage, and can slippage airtightly in this intracavity, this end cap is fastened in the operating side of this movable push bar, and have one run through by end cap central shield and sustain pipe;
One pumpback part, it airtightly can be arranged at the push rod chamber of this movable push bar slippingly, this pumpback part includes a pull bar and an airtight plug sleeve, this pull bar passes outside this push rod chamber with a holding end by the pipe of shielding and sustain of this end cap, and engage this airtight plug sleeve with a reverse block end and stretch into this push rod intracavity, make this airtight plug sleeve fit in this interior airtight gear plug.
Aforesaid safety injector and needle body needle stand pumpback device thereof, wherein the front end face of this interior airtight gear plug is hollowly formed with the needle stand connecting portion that is groove body pattern, and the fitting portion of this needle stand is step shape and be formed at the rearward end of this needle stand, and this fitting portion is to should needle stand connecting portion and in the hitching post build formula protruded.
Aforesaid safety injector and needle body needle stand pumpback device thereof, wherein the front end face of this interior airtight gear plug protrudes out forward and is formed with the needle stand connecting portion that is circle hitching post build formula, and the fitting portion of this needle stand corresponds to this needle stand connecting portion and formed in groove body in rearward end.
Aforesaid safety injector, wherein the interior needle body being through to the cylinder chamber of this Large Diameter Pipeline section that formed of the pipe with small pipe diameter section of this cylindrical shell stretches out hole, and form a diameter in the rear ring wall that this needle body stretches out hole and be greater than the needle stand that this needle body stretches out hole and shield and sustain hole, and in this needle body stretch out hole and this needle stand shield and sustain the adjacent ring wall in hole be formed one can for this needle stand front-end edge against against terrace edge.
Aforesaid safety injector, wherein this needle stand is shielded and sustain contiguous this in front end, hole and is formed with one for the drag reduction spacing of this needle stand displacement against terrace edge.
Aforesaid safety injector and needle body needle stand pumpback device thereof, wherein this push rod intracavity is formed with one first snap ring on the ring wall of contiguous this medicament propelling movement end.
Aforesaid safety injector and needle body needle stand pumpback device thereof, wherein this push rod intracavity is formed with one second snap ring on the ring wall of this operating side contiguous.
Aforesaid safety injector and needle body needle stand pumpback device thereof, wherein this interior airtight gear plug is the post block of step shape and has a protuberance, one plugs together portion and draws the cork groove, before this protuberance and this portion of plugging together lay respectively at this interior airtight gear plug, back segment, the diameter of this protuberance is less than the diameter that this plugs together portion, this needle stand connecting portion is formed at the front end face centre of this protuberance, this geosynclinal concave of drawing the cork falls into and is formed at the rear end face centre that this plugs together portion, this periphery wall plugging together portion is around being arranged with an annular groove, this plugs together portion is equipped in this movable push bar the first snap ring with this annular groove correspondence, this protuberance is airtight is sticked in the internal perisporium that this medicament pushes end.
Aforesaid safety injector and needle body needle stand pumpback device thereof, wherein the medicament of this movable push bar pushes end formation one ring sleeve portion, this exogenous QI crammed plug is corresponding airtight be sleeved on this ring sleeve portion and this interior airtight gear plug protuberance and can airtight slippage in the cylinder intracavity of this cylindrical shell, and can against the rear end face of needle stand retainer ring fitting in this syringe needle group.
Aforesaid safety injector and needle body needle stand pumpback device thereof, wherein exogenous QI crammed plug and this medicament of this pushing piece push and hold airtight joint and be correspondingly airtightly sleeved on this and interiorly airtightly keep off the protuberance filled in, and can slippage airtightly in the cylinder intracavity of this cylindrical shell.
Aforesaid safety injector and needle body needle stand pumpback device thereof, wherein the medicament of this movable push bar pushes end formation one screw part, and this exogenous QI crammed plug and this screw part are airtight screws togather and be correspondingly airtightly sticked in this and interiorly airtightly keep off the protuberance filled in, and can slippage airtightly in the cylinder intracavity of this cylindrical shell.
Aforesaid safety injector and needle body needle stand pumpback device thereof, wherein, the internal perisporium of end is pushed around being convexly equipped with an internal ring in this medicament, the periphery wall of the protuberance of this interior airtight gear plug is around being provided with a concave ring groove, and this protuberance is with this concave ring groove correspondence and airtight this medicament being sticked in this movable push bar pushes the internal ring held.
Aforesaid safety injector and needle body needle stand pumpback device thereof, wherein the medicament of this movable push bar pushes end formation one screw part, and this exogenous QI crammed plug and this medicament push to hold and airtightly screw togather and be correspondingly airtightly sticked in this and interiorly airtightly keep off the protuberance filled in, and can slippage airtightly in the cylinder intracavity of this cylindrical shell, and the protuberance of this interior airtight gear plug and this plug together portion and can be decomposed into a convex section and the section of plugging together, and mutually can screw togather and be integrated and form this interior airtight gear plug, exogenous QI crammed plug is airtight engages for periphery wall and this of this convex section, and its front end face forms this needle stand connecting portion, thereafter end face forms a screw part, this section of plugging together front end face to should convex section screw part and form a spiro union portion, and can be integrated with the tight spiral shell of this screw part, its periphery wall is around being arranged with an annular groove, and this section of plugging together is with corresponding airtight the first snap ring being equipped in this push rod chamber of this annular groove.
Aforesaid safety injector and needle body needle stand pumpback device thereof, wherein the pull bar of this pumpback part is the stock body that periphery is formed with multiple rib, its two ends are respectively this block end and this holding end, this block end is positioned at the front end of this pull bar and is provided with multiple interval and arranges and the fixing bulge loop being surrounded on this pull bar, this holding end is positioned at the rear end of this pull bar and passes this end cap, this pull bar is equipped with a depression breach at this fixing bulge loop rear contiguous, and this depression breach forms the point of application that this pull bar fractures.
Aforesaid safety injector and needle body needle stand pumpback device thereof, wherein be equipped with a clamping ring edge in overhead kick shape between the fixing bulge loop of this pull bar and this depression breach, and forming a locking edge in the port ring wall of shielding and sustain pipe of this end cap, the clamping ring edge of this pull bar correspondence can be snapped in this locking edge.
Aforesaid safety injector and needle body needle stand pumpback device thereof, wherein this this pull bar block end of pumpback part mat engages this airtight plug sleeve, and pulled back by this holding end and move this pumpback part, make the clamping ring edge of this pull bar be locked to the locking edge of this end cap, and produce the vacuum attraction energy in a low pressure space, pole in this push rod intracavity.
Aforesaid safety injector and needle body needle stand pumpback device thereof, wherein this this pull bar block end of pumpback part mat engages this airtight plug sleeve, and pulled back by this holding end and move this pumpback part, make this airtight plug sleeve be equipped in the second snap ring of this push rod cavity rear end, and produce the vacuum attraction energy in a low pressure space, pole in this push rod intracavity.
The present invention moves displacement by pumpback part in the movable push bar pulled rearward of pushing piece, the air of push rod intracavity is removed by pumpback part, and be equipped in the rear end of pushing piece, movable push bar inside is made to form a low pressure space, pole, and form a pull of vacuum prestored, and medicament in cylindrical shell pushed after injection completes by pushing piece, the needle stand retainer ring of further driven forward syringe needle group, needle stand retainer ring is made to depart from the blocking bulge loop of needle stand and cylindrical shell, needle stand is made to be sticked in interior airtight gear plug and synchronization-sliding enters push rod intracavity, and the atmospheric pressure outside mat push rod chamber promotes, make the needle body of needle stand and set merge this interior airtight gear plug and synchronously enter push rod intracavity, to use to produce, the automatic pumpback of the needle body polluted is to the effect in movable push bar, reach the object of prevention acupuncture, and, closed by the easy structure of concavo-convex relative blocking between each component and reach effect that is chimeric and that be separated, the structure of substantial simplifications syringe inside, and also simplify the flow process manufactured, quite there is practical value.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Accompanying drawing explanation
The schematic appearance of Fig. 1 the first preferred embodiment of the present invention;
The decomposing schematic representation of Fig. 2 the first preferred embodiment of the present invention;
The using state figure pulling pull bar of Fig. 3 A the first preferred embodiment of the present invention;
The using state figure of the pull bar that fractures of Fig. 3 B the first preferred embodiment of the present invention;
The pushing piece that utilizes of Fig. 4 A the first preferred embodiment of the present invention extracts the using state figure of medicinal liquid;
The using state figure utilizing pushing piece liquid medicine injection of Fig. 4 B the first preferred embodiment of the present invention;
The pushing pushing piece of Fig. 5 A the first preferred embodiment of the present invention also promotes the using state figure of needle stand retainer ring;
The using state figure that the needle stand of Fig. 5 B the first preferred embodiment of the present invention and all blockings of needle stand retainer ring are removed;
The needle body of Fig. 6 the first preferred embodiment of the present invention, needle stand and interior airtight gear plug are moved to the using state figure in push rod chamber by external atmospheric pressure;
The decomposing schematic representation of Fig. 7 the second preferred embodiment of the present invention;
The schematic appearance of Fig. 8 the 3rd preferred embodiment of the present invention;
The schematic appearance of Fig. 9 the 4th preferred embodiment of the present invention;
The schematic appearance of Figure 10 the 5th preferred embodiment of the present invention;
The schematic appearance of Figure 11 the 6th preferred embodiment of the present invention;
Schematic appearance after Figure 12 the 6th preferred embodiment of the present invention uses.
Wherein, Reference numeral
10 cylindrical shell 101 Large Diameter Pipeline sections
102 pipe with small pipe diameter section 11 syringe needle group installation ends
110 needle bodies stretch out hole 111 drag reduction spacing
112 against terrace edge 113 rib
Hole shielded and sustain by 114 needle stands
12 operation holding end 120 hand grip portions
1201 label hole 121 upstream ends
122 bulge loop 13 chambeies
130 blocking bulge loop 131 needle stand positioning sections
132 active segments
20,20A pushing piece 21 movable push bar
210 push rod chamber 211 first snap rings
212 outer ring edge 213 ring sleeve portions
214 engaging edge 215 internal ring
216 medicaments push end 217 operating side
218 second snap rings
22,22E exogenous QI crammed plug 221 plugs together hole
Airtight gear plug in 222 circular grooves 23,23A, 23D, 23E
231 protuberance 2311 concave ring grooves
232 plug together portion 2321 annular groove
233,233A needle stand connecting portion 234 is drawn the cork groove
235 gas-tight ring 231E convex sections
The 2311E screw part 232E section of plugging together
2321E spiro union portion 2322E annular groove
24 end cap 241 lid bodies
242 cover groove 243 covers the end
244 shield and sustain pipe 2440 engages edge
30 pumpback part 31 pull bars
311 block ends 3110 fix bulge loop
3111 clamping ring edge 312 holding ends
3120 grooves 313 cave in breach
32 airtight plug sleeve 321 holding sections
322 slot 3220 fastening ring edge
323 ring draw-in grooves
40,40A syringe needle group 41 needle body
42,42A needle stand 421 needle body fixing hole
422,422A fitting portion 4220 profile groove
423 relief edge 43 needle stand retainer rings
431 abutment face 432 blocking annular grooves
433 needle stand airtight fixing hole 50 pin lid
60 medicaments
A, B, C, D, E safety injector
Detailed description of the invention
In order to technical characteristic of the present invention and practical effect can be understood in detail, and can implement according to the content of description, further with preferred embodiment as shown in drawings, be described in detail as follows:
A kind of safety injector of the present invention, refers to first preferred embodiment of Fig. 1 to Fig. 4, and it is about the safety injector A of 3CC for injection volume, and includes cylindrical shell 10, pushing piece 20, pumpback part 30, syringe needle group 40 and a pin lid 50.
As shown in Figures 1 and 2, and the left and right direction of predefined Fig. 1, Fig. 2 is the front and rear direction of description.This cylindrical shell 10 is the hollow cylindrical bodies extended along front and rear direction, and there is a Large Diameter Pipeline section 101 and be positioned at this Large Diameter Pipeline section 101 front end and form the pipe with small pipe diameter section 102 of gradually-reducing shape, the one end being connected to this pipe with small pipe diameter section 102 in the Large Diameter Pipeline section 101 of this cylindrical shell 10 is defined as a syringe needle group installation end 11, and be oppositely defined as an operation holding end 12 away from one end of this syringe needle group installation end 11, then form a chamber 13 in the inside of this Large Diameter Pipeline section 101, can store for suction medicament and inject.
Wherein, form a needle body being through to this chamber 13 in this pipe with small pipe diameter section 102 and stretch out hole 110, and form a diameter in the rear ring wall that this needle body stretches out hole 110 and be greater than the needle stand that this needle body stretches out hole 110 and shield and sustain hole 114, and form one against terrace edge 112 in the adjacent ring wall that hole 114 shielded and sustain by this needle stand and this needle body stretches out hole 110, the rear end ring wall of shielding and sustain hole 114 at this needle stand is then equipped with multiple rib 113, this each rib 113 is for assisting the structure shielding and sustain this syringe needle group 40, this needle stand is shielded and sustain contiguous this in front end, hole 114 and is formed with against terrace edge 112 the drag reduction spacing 111 that supplies this syringe needle group 40 displacement, this needle stand shield and sustain hole 114 respectively help bar 113 to coordinate with this this syringe needle group installation end 11 is collaborative shields and sustain, locate this syringe needle group 40.
In the periphery wall of the operation holding end 12 of this cylindrical shell 10 around forming the radial hand grip portion 120 protruded outwardly, multiple label hole 1201 of installing for label or famous brand is offered in this hand grip portion 120, and form an open upstream end 121 backwards in the rear end of this operation holding end 12, form the bulge loop 122 around projection at the internal ring wall of this cylindrical shell 10 this operation holding end 12 contiguous; The ring wall ring being adjacent to this syringe needle group installation end 11 in this chamber 13 establishes formation one blocking bulge loop 130, this blocking bulge loop 130 place internal diameter reduces, and the needle stand positioning section 131 and this chamber 13 being separated formation one this syringe needle group installation end 11 contiguous is positioned at reciprocal active segment 132.
This pushing piece 20 airtightly can be arranged at the cylinder chamber 13 of this cylindrical shell 10 slippingly, and includes airtight gear plug 23 and an end cap 24 in movable push bar 21, exogenous QI crammed plug 22, wherein, this movable push bar 21 is that caliber is roughly the same and front, the straight pipe of hollow through afterwards, and include adjacent front end edge and the medicament that internal diameter slightly reduces pushes end 216 and the operating side 217 of oppositely stretching out outside this chamber 13, this movable push bar 21 pushes the annoying close active segment 132 being arranged at this chamber 13 with displacement of end 216 with this medicament, a push rod chamber 210 is formed in the inside of this movable push bar 21, and inwall this medicament contiguous respectively in this push rod chamber 210 pushes end 216 around being convexly equipped with one first snap ring 211, and second snap ring 218 near this operating side, and in this movable push bar 21 this operating side 217 periphery wall contiguous around formation one outer ring edge 212, this movable push bar 21 is equipped in the bulge loop 122 of this cylindrical shell 10 with this outer ring edge 212 correspondence, make this movable push bar 21 after drug injection completes, can not easily depart from this chamber 13 by inlay card, push end 216 end at the medicament of this movable push bar 21 and form the ring sleeve portion 213 that is step shape, then around being convexly equipped with an engaging edge 214 outside the rear end perisporium of this movable push bar 21, at the internal perisporium of this ring sleeve portion 213 around being convexly equipped with an internal ring 215.
This exogenous QI crammed plug 22 correspondence is sleeved on the ring sleeve portion 213 of this movable push bar 21, is formed forward and backwardly through plug together hole 221 in the central authorities of this exogenous QI crammed plug 22, and formed in this inwall plugging together hole 221 can for the circular groove 222 being fastened on this ring sleeve portion 213.
This interior airtight gear plug 23 airtightly can be equipped in the internal perisporium of the medicament propelling movement end 216 of this movable push bar 21, and be airtightly sleeved on this exogenous QI crammed plug 22, this interior airtight gear plug 23 is the post block of step shape and has a protuberance 231, one plugs together portion 232, one needle stand connecting portion 233 and one is drawn the cork groove 234, this protuberance 231 and this plug together before portion 232 lays respectively at this interior airtight gear plug 23, back segment, the diameter of this protuberance 231 is less than the diameter that this plugs together portion 232, wherein, the periphery wall of this protuberance 231 is around being provided with a concave ring groove 2311, what this protuberance 231 correspondence penetrated this exogenous QI crammed plug 22 airtightly plugs together hole 221, and with this concave ring groove 2311 corresponding the and airtight internal ring 215 being sticked in this ring sleeve portion 213, this periphery wall plugging together portion 232 is around being arranged with an annular groove 2321, it is corresponding and be equipped in the first snap ring 211 place of this movable push bar 21 airtightly with this annular groove 2321 that this plugs together portion 232, make this interior airtight gear plug 23 can be fixed on this movable push bar 21 and be airtightly sleeved on this exogenous QI crammed plug 22, this needle stand connecting portion 233 is the pattern of groove and canyon topography is formed in the front end face centre of this protuberance 231, and this groove 234 of drawing the cork is recessed to form and plugs together the rear end face centre in portion 232 in this.
This end cap 24 correspondence is sticked in the operating side 217 of this movable push bar 21, this end cap 24 have a lid body 241, be cylindrically formed in lid body 241 internal ring wall cover groove 242, to close at the bottom of the lid of this lid body 241 Single port 243, one be formed at 243 central authorities at the bottom of this lid and with this lid body 241 concentrically cylinder and front and back through shield and sustain pipe 244, this is shielded and sustain pipe 244 and is convexly equipped with a locking edge 2440 towards this equidirectional Single port inner edge of lid body 241 opening.
This pumpback part 30 airtightly can be arranged at the push rod chamber 210 of this movable push bar 21 slippingly, this pumpback part 30 includes pull bar 31 and an airtight plug sleeve 32, the stock body of this pull bar 31 multiple rib for periphery is formed, and there is block end 311 and a holding end 312 respectively, this pull bar 31 passes outside this push rod chamber 210 with this holding end 312 end by the pipe 244 of shielding and sustain of this end cap 24, and engage this airtight plug sleeve 32 with this reverse block end 311 and stretch in this push rod chamber 210, this airtight plug sleeve 32 is fitted this interior airtight gear plug 23, this block end 311 is positioned at the front end of this pull bar 31 and is provided with multiple interval and arranges and the fixing bulge loop 3110 being surrounded on this pull bar 31, this pull bar 31 is convexly equipped with at the rear side of each fixing bulge loop 3110 the clamping ring edge 3111 that is overhead kick shape, this pull bar 31 forms an annular depression breach 313 at the rear side of this clamping ring edge 3111 contiguous, and this depression breach 313 becomes the point of application that this pull bar 31 fractures, this pull bar 31 can be fractureed by being provided with this depression breach 313, this holding end 312 is positioned at the rear end of this pull bar 31 and passes this end cap 24, and form multiple interval and arrange and be surrounded on the groove 3120 of this pull bar 31, this pull bar 31 is enable to increase frictional force when pulling by the setting of each groove 3120.
This airtight plug sleeve 32 is incorporated into the block end 311 of this pull bar 31, and the holding section 321 corresponding to this groove 234 shape of drawing the cork is formed in the front end of this airtight plug sleeve 32, and be provided with a slot 322 at the rear end fovea centralis of this airtight plug sleeve 32, in the internal face of this slot 322 then around the fastening ring edge 3220 being provided with an internal diameter and being greater than the internal diameter of this slot 322, this airtight plug sleeve 32 is fastened on the fixing bulge loop 3110 of this block end 311 with fastening ring edge 3220 correspondence of this slot 322, and then reach preferably fixed effect, in the circumferential lateral surface of this airtight plug sleeve 32 around the ring draw-in groove 323 of formation one recess, the shape of this ring draw-in groove 323 is the shapes corresponding to this second snap ring 218, make this airtight plug sleeve 32 that this ring draw-in groove 323 correspondence can be utilized to be fastened in this second snap ring 218 place.
This syringe needle group 40 correspondence is installed on the syringe needle group installation end 11 of this cylindrical shell 10, and include a needle body 41, one is sheathed on needle stand outside this needle body 41 42 and is sheathed on needle stand retainer ring 43 outside this needle stand 42, this needle stand 42 in a cylindric and needle body fixing hole 421 with the center of being formed at for sticking together this needle body 41 of fixing, and this needle stand 42 is shielded and sustain with front end and is shielded and sustain between hole 114 and this each rib 113 in this needle stand, and and this is against this drag reduction spacing 111 of terrace edge 112 interval, rearward end in this needle stand 42 forms a fitting portion 422, this fitting portion 422 is the round bolt shape cylinder pattern protruded, and shape corresponds to the needle stand connecting portion 233 of this interior airtight gear plug 23, and may correspond to and be fastened in needle stand connecting portion 233, the profile groove 4220 of this needle body fixing hole 421 of one connection is provided with in this fitting portion 422, this profile groove 4220 can be used as the medicament of discharging this cylindrical shell 10 inside, in the outside of this needle stand 42 outer peripheral face of this fitting portion 422 contiguous then ring establish formation one relief edge 423.
This needle stand retainer ring 43 is in hollow cylindrical elastomer, the rear end face of this needle stand retainer ring 43 forms an abutment face 431, the outer shroud side face of this needle stand retainer ring 43 is equipped with a correspondence and the airtight blocking annular groove 432 being fastened in this blocking bulge loop 130, inner peripheral in this needle stand retainer ring 43 forms the relief edge 423 corresponding to this needle stand 42 and the airtight fixing hole 433 of needle stand in penetration state, this needle stand retainer ring 43 is linked in this relief edge 423 so that this needle stand airtight fixing hole 433 is corresponding airtight, and fixes this needle stand 42.
This pin lid 50 correspondence is linked in the syringe needle group installation end 11 of this cylindrical shell 10, and is covered on the periphery of the needle body 41 of this syringe needle group 40, to avoid this needle body 41 of the careless false touch of medical personnel.
The occupation mode of present pre-ferred embodiments as shown in Figures 3 to 6, first, please refer to the action signal of Fig. 3, one user can pull back the pull bar 31 of this pumpback part 30, make this pull bar 31 and this airtight plug sleeve 32 by external force at push rod chamber 210 intrinsic displacement of this movable push bar 21, and this airtight plug sleeve 32 of mat removes the air in this push rod chamber 210, until the rear end of this movable push bar 21 moved to by this airtight plug sleeve 32, and the locking edge 2440 of this end cap 24 is sticked in clamping ring edge 3111 correspondence of this pull bar 31, this pull bar 31 is made to be fixed on this end cap 24, now this depression breach 313 of this pull bar 31 just can close to the trailing edge of this end cap 24, user is more firmly by this pull bar 31 laterally switch out, the block end 311 of this pull bar 31 and this airtight plug sleeve 32 will be made to be fixed on the rear end in this push rod chamber 210, and make the inside of this movable push bar 21 form a low pressure space, pole.
As shown in Figure 4, this user can unload pin lid 50 (scheming not shown), and comply with the medicament 60 in the identical operation technique extraction solution medicinal cupping of known syringe with this needle body 41, and by promoting this pushing piece 20, this medicament 60 is injected in human body forward, and by this needle stand retainer ring 43 and this exogenous QI crammed plug 22, and this needle stand 42 and the mutual corresponding airtight laminating of this interior airtight gear plug 23, can by the complete injection of this medicament 60 rarely medicament remain in syringe.
As shown in Figure 5, after this medicament 60 is injected completely, the front end face of this pushing piece 20 will be pushed to the rear end face of the needle stand retainer ring 43 being urgently fitted in this syringe needle group 40, and the fitting portion 422 of this needle stand 42 also corresponding needle stand linking part 233 being closely embedded in this interior airtight gear plug 23, now this user promotes this pushing piece 20 further, this needle stand 42 front-end edge is made to be pushed into this drag reduction spacing 111, and be locked to this against terrace edge 112, simultaneously and drive this needle stand retainer ring 43 to form with this blocking bulge loop 130 fixing state of dissociating, when this pushing piece 20 continues to push ahead, this needle stand retainer ring 43 will be pushed in the needle stand positioning section 131 in this chamber 13, and to dissociate airtight fit state with this needle stand 42, simultaneously, the airtight blocking state that interior airtight gear plug 23 and this medicament of this pushing piece 20 push end 216 is also synchronously dissociated, until this pushing piece 20 is subject to this end cap 24 and this upstream end 121 restriction against each other, this needle stand 42 is fitting to connection and is pushed in this push rod chamber 210 in pole low pressure state in this interior airtight gear plug 23 part, now as shown in Figure 6, the pole low pressure spatiality prestored because of this inside, push rod chamber 210 will cause extraneous larger atmospheric pressure synchronously to push in this push rod chamber 210 by the needle stand 42 of this interior airtight gear plug and this fitting connection and this needle body 41, and produce the effect of this needle body 41 and the automatic pumpback of this needle stand 42.
Thus, the design in the inner instant low pressure space, pole formed of this pushing piece 20 is made by the operation of pumpback part 30 of the present invention, after completing drug injection program, this pushing piece 20 is only needed to continue to advance, this needle body 41 and this needle stand 42 just can be allowed to be recycled to push rod chamber 210 because of the transmission effect of pressure, use intuition very, and effectively simplify the process manufactured, the demand reduced costs can be reached, user does not need to emit again has the risk touching this needle body 41 to carry out reclaiming or destroying, and quite has practical value.
As shown in Figure 7, it is roughly the same with the first preferred embodiment of the present invention in second preferred embodiment of the present invention, and difference is the needle stand 42A of the interior airtight gear plug 23A and this syringe needle group 40A of this pushing piece 20A; Wherein, the needle stand linking part 233A of this interior airtight gear plug 23A protrudes out the pattern forming cylinder bolt shape forward, the fitting portion 422A of this needle stand 42A then corresponds to the round bolt shape cell body of this needle stand linking part 233A formation in depression, this needle stand linking part 233A can to should fitting portion 422A, other structure and using state are all identical with the first preferred embodiment, are not described at this.
As shown in Figure 8, it is roughly the same with first and second preferred embodiment of the present invention in 3rd preferred embodiment of the present invention, and Fig. 8 discloses the safety injector B that injection capacity is about 5CC, other structure and occupation mode, all roughly the same with the first preferred embodiment.
4th preferred embodiment of the present invention as shown in Figure 9, it is roughly the same with the first preferred embodiment of the present invention, Fig. 9 discloses the safety injector C that injection capacity is about 1CC, this exogenous QI crammed plug 22 this medicament that is tightly connected pushes end 216 and is sleeved on the protuberance 231 of this interior airtight gear plug 23 airtightly, other structure and occupation mode, all roughly the same with the first preferred embodiment.
5th preferred embodiment of the present invention as shown in Figure 10, it is roughly the same with the first preferred embodiment of the present invention, Figure 10 discloses the safety injector D that injection capacity is about 0.5CC, wherein, because the cylindrical shell caliber of 0.5CC is less, the inwall airtight joint of multiple gas-tight ring 235 and this movable push bar 21D is arranged with outside the portion that plugs together 232 of this interior airtight gear plug 23D, and this interior airtight gear plug 23D is reached can the effect of airtight movement, the inwall airtight joint of the airtight plug sleeve 32D being positioned at this pull bar 31D front end also kenel and this movable push bar 21D in the form of a ring, other structure and occupation mode, all roughly the same with the first preferred embodiment.
6th preferred embodiment of the present invention is as Figure 11, shown in Figure 12, it is roughly the same with the first preferred embodiment of the present invention, the interior airtight gear plug 23E of the safety injector E only disclosed by Figure 11 can be respectively a convex section 231E by the component of two decomposition and the section of a plugging together 232E is assembled in a screw connection manner, exogenous QI crammed plug 22E and this medicament of this pushing piece 20 push that end 216 is airtight to be screwed togather and be correspondingly sticked in this and interiorly airtightly keep off the convex section 231E filling in 23E, and can slippage airtightly in this chamber 13, the periphery wall of this convex section 231E engages with this exogenous QI crammed plug 22E is airtight, and its front end face forms this needle stand linking part 233, thereafter end face forms a screw part 2311E, this section of plugging together 232E front end face to should convex section 231E screw part 2311E and form a spiro union portion 2321E, and closely can screw togather with this screw part 2311E and be integrated, its periphery wall is around being arranged with an annular groove 2322E, this section of plugging together 232E is with corresponding airtight the first snap ring 211 be equipped in this movable push bar 21 of this annular groove 2322E, other structure and occupation mode, all roughly the same with the first preferred embodiment.
The present invention is provided with pumpback part in the inside of pushing piece, the manually mode of pull pumpback part, make the instantaneity landform poling low pressure space, inside of pushing piece, and the pull of vacuum that prestores, again by pushing piece being pushed to appropriate location in injection process, the atmospheric pressure making needle body and needle stand be linked to interior airtight gear plug and the synchronous mat external world pushes and enters to push rod intracavity, reach automatic and the effect of the needle body that bounces back safely, and, closed by the easy structure of concavo-convex relative blocking to reach effect that is chimeric and that be separated between each component, the structure of substantial simplifications syringe inside, and also simplify the flow process of production and technique, and then produce the effect reducing manufacturing cost, quite there is practical value.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.
Claims (32)
1. a safety injector, is characterized in that, comprising:
One cylindrical shell, it is a hollow cylindrical body, and there is a Large Diameter Pipeline section and be positioned at this Large Diameter Pipeline section front end and the pipe with small pipe diameter section forming gradually-reducing shape, the one end connecting this pipe with small pipe diameter section in the Large Diameter Pipeline section of this cylindrical shell is defined as a syringe needle group installation end, and be oppositely defined as an operation holding end away from one end of this syringe needle group installation end, then form a chamber in the inside of this Large Diameter Pipeline section, the ring wall projection being adjacent to this syringe needle group installation end in this intracavity is formed with a blocking bulge loop;
One pushing piece, it airtightly can be arranged at the cylinder chamber of this cylindrical shell slippingly, and includes:
One movable push bar, its have a hollow push rod chamber, one can slippage in this intracavity and interior caliber pushes end and in the medicament slightly reducing shape extend to operating side outside this chamber;
Airtight gear plug in one, it is equipped in the push rod intracavity that this medicament pushes end airtightly;
One exogenous QI crammed plug, itself and the medicament of this movable push bar push hold and this interior airtight keep off filling in mutually airtightly to engage, and can slippage airtightly in this intracavity;
One end cap, it is fastened in the operating side of this movable push bar, and have one run through by end cap central shield and sustain pipe;
One pumpback part, it airtightly can be arranged at the push rod chamber of this movable push bar slippingly, this pumpback part includes a pull bar and an airtight plug sleeve, this pull bar passes outside this push rod chamber with a holding end by the pipe of shielding and sustain of this end cap, and engage this airtight plug sleeve with a reverse block end and stretch into this push rod intracavity, this airtight plug sleeve is fitted this interior airtight gear plug;
One syringe needle group, its correspondence is installed on the syringe needle group installation end of this cylindrical shell, and include a needle body, needle stand and be sheathed on outside this needle body and be sheathed on needle stand retainer ring outside this needle stand, this needle stand is arranged at the cylinder intracavity of this syringe needle group installation end, and shielded and sustain in this pipe with small pipe diameter section with front end, this needle stand retainer ring is sticked in the blocking bulge loop in this Large Diameter Pipeline section, the rearward end of this needle stand forms a fitting portion, and this needle stand is with this fitting portion correspondence and concavo-convex blocking is incorporated into airtight gear plug in this pushing piece;
This this pull bar of pumpback part mat pulls back displacement airtightly in this movable push bar, this airtight plug sleeve of mat removes the air of this push rod intracavity, and be equipped in the rear end of this movable push bar, this movable push bar inside is made to form a low pressure space, pole, and after drug injection completes, the needle stand retainer ring of this this syringe needle group of pushing piece driven forward of mat, this needle stand retainer ring is made to depart from the blocking bulge loop of this needle stand and this cylindrical shell, this needle stand is made to link in this movable push bar of the synchronous immigration of this interior airtight gear plug, and by the atmospheric pressure in the external world, this interior airtight gear plug is pushed in this movable push bar in conjunction with this needle stand and this needle body, use generation safety, the effect of automatic drawing back needling body.
2. safety injector according to claim 1, it is characterized in that, the front end face of this interior airtight gear plug is hollowly formed with the needle stand connecting portion that is groove body pattern, and the fitting portion of this needle stand is step shape and be formed at the rearward end of this needle stand, and this fitting portion is to should needle stand connecting portion and in the hitching post build formula protruded.
3. safety injector according to claim 1, it is characterized in that, the front end face of this interior airtight gear plug protrudes out forward and is formed with the needle stand connecting portion that is circle hitching post build formula, and the fitting portion of this needle stand corresponds to this needle stand connecting portion and formed in groove body in rearward end.
4. safety injector according to claim 1, it is characterized in that, form a needle body being through to the cylinder chamber of this Large Diameter Pipeline section in the pipe with small pipe diameter section of this cylindrical shell and stretch out hole, and form a diameter in the rear ring wall that this needle body stretches out hole and be greater than the needle stand that this needle body stretches out hole and shield and sustain hole, and in this needle body stretch out hole and this needle stand shield and sustain the adjacent ring wall in hole be formed one can for this needle stand front-end edge against against terrace edge.
5. safety injector according to claim 4, is characterized in that, this needle stand is shielded and sustain contiguous this in front end, hole and is formed with against terrace edge the drag reduction spacing that supplies this needle stand displacement.
6. safety injector according to any one of claim 1 to 5, is characterized in that, this push rod intracavity pushes on the ring wall of end in this medicament contiguous and is formed with one first snap ring.
7. according to the safety injector described in claim 6, it is characterized in that, this push rod intracavity is formed with one second snap ring on the ring wall of this operating side contiguous.
8. according to the safety injector described in claim 6, it is characterized in that, this interior airtight gear plug is the post block of step shape and has a protuberance, one plugs together portion and draws the cork groove, before this protuberance and this portion of plugging together lay respectively at this interior airtight gear plug, back segment, the diameter of this protuberance is less than the diameter that this plugs together portion, this needle stand connecting portion is formed at the front end face centre of this protuberance, this geosynclinal concave of drawing the cork falls into and is formed at the rear end face centre that this plugs together portion, this periphery wall plugging together portion is around being arranged with an annular groove, this plugs together portion is equipped in this movable push bar the first snap ring with this annular groove correspondence, this protuberance is airtight is sticked in the internal perisporium that this medicament pushes end.
9. safety injector according to claim 8, it is characterized in that, the medicament of this movable push bar pushes end formation one ring sleeve portion, this exogenous QI crammed plug is corresponding airtight be sleeved on this ring sleeve portion and this interior airtight gear plug protuberance and can airtight slippage in the cylinder intracavity of this cylindrical shell, and can against the rear end face of needle stand retainer ring fitting in this syringe needle group.
10. the safety injector according to Claim 8 described in item, is characterized in that, exogenous QI crammed plug and this medicament of this pushing piece push to be held airtight joint and is correspondingly airtightly sleeved on this and interiorly airtightly keeps off the protuberance filled in, and can slippage airtightly in the cylinder intracavity of this cylindrical shell.
11. safety injectors according to Claim 8 described in item, it is characterized in that, the medicament of this movable push bar pushes end formation one screw part, and this exogenous QI crammed plug and this screw part are airtight screws togather and be correspondingly airtightly sticked in this and interiorly airtightly keep off the protuberance filled in, and can slippage airtightly in the cylinder intracavity of this cylindrical shell.
12. safety injectors according to claim 8, it is characterized in that, the internal perisporium of end is pushed around being convexly equipped with an internal ring in this medicament, the periphery wall of the protuberance of this interior airtight gear plug is around being provided with a concave ring groove, and this protuberance is with this concave ring groove correspondence and airtight this medicament being sticked in this movable push bar pushes the internal ring held.
13. according to the safety injector described in claim 12, it is characterized in that, the protuberance of this interior airtight gear plug and this plug together portion and can be decomposed into a convex section and the section of plugging together, and mutually can screw togather and be integrated and form this interior airtight gear plug, exogenous QI crammed plug is airtight engages for periphery wall and this of this convex section, and its front end face forms this needle stand connecting portion, end face forms a screw part thereafter; This section of plugging together front end face to should convex section screw part and form a spiro union portion, and can be integrated with the tight spiral shell of this screw part, its periphery wall is around being arranged with an annular groove, and this section of plugging together is with corresponding airtight the first snap ring being equipped in this push rod chamber of this annular groove.
14. safety injectors according to claim 6, it is characterized in that, the pull bar of this pumpback part is the stock body that periphery is formed with multiple rib, its two ends are respectively this block end and this holding end, this block end is positioned at the front end of this pull bar and is provided with multiple interval and arranges and the fixing bulge loop being surrounded on this pull bar, this holding end is positioned at the rear end of this pull bar and passes this end cap, and this pull bar is provided with a depression breach at this fixing bulge loop rear contiguous, and this depression breach forms the point of application that this pull bar fractures.
15. safety injectors according to claim 14, it is characterized in that, the clamping ring edge that one is overhead kick shape is equipped with between the fixing bulge loop of this pull bar and this depression breach, and forming a locking edge in the port ring wall of shielding and sustain pipe of this end cap, the clamping ring edge of this pull bar correspondence can be snapped in this locking edge.
16. safety injectors according to claim 15, it is characterized in that, this this pull bar block end of pumpback part mat engages this airtight plug sleeve, and pulled back by this holding end and move this pumpback part, make the clamping ring edge of this pull bar be locked to the locking edge of this end cap, and produce the vacuum attraction energy in a low pressure space, pole in this push rod intracavity.
17. safety injectors according to claim 14, it is characterized in that, this this pull bar block end of pumpback part mat engages this airtight plug sleeve, and pulled back by this holding end and move this pumpback part, make this airtight plug sleeve be equipped in the second snap ring of this push rod cavity rear end, and produce the vacuum attraction energy in a low pressure space, pole in this push rod intracavity.
The needle body needle stand pumpback device of 18. 1 kinds of safety injectors, is characterized in that, comprising:
One pushing piece, it airtightly can be arranged at an intracavity of a cylindrical shell of a syringe slippingly, and includes airtight gear plug, an exogenous QI crammed plug and an end cap in a movable push bar; Wherein, this movable push bar have a hollow push rod chamber, one can slippage in this intracavity and interior caliber pushes end and in the medicament slightly reducing shape extend to operating side outside this chamber, this interior airtight gear plug is equipped in the push rod intracavity that this medicament pushes end airtightly, this exogenous QI crammed plug and the medicament of this movable push bar push hold and this interior airtight keep off filling in mutually airtightly to engage, and can slippage airtightly in this intracavity, this end cap is fastened in the operating side of this movable push bar, and have one run through by end cap central shield and sustain pipe;
One pumpback part, it airtightly can be arranged at the push rod chamber of this movable push bar slippingly, this pumpback part includes a pull bar and an airtight plug sleeve, this pull bar passes outside this push rod chamber with a holding end by the pipe of shielding and sustain of this end cap, and engage this airtight plug sleeve with a reverse block end and stretch into this push rod intracavity, make this airtight plug sleeve fit in this interior airtight gear plug.
The needle body needle stand pumpback device of 19. safety injectors according to claim 18, it is characterized in that, the front end face of this interior airtight gear plug is hollowly formed with the needle stand connecting portion that is groove body pattern, and the fitting portion of this needle stand is step shape and be formed at the rearward end of this needle stand, and this fitting portion is to should needle stand connecting portion and in the hitching post build formula protruded.
The needle body needle stand pumpback device of 20. safety injectors according to claim 18, it is characterized in that, the front end face of this interior airtight gear plug protrudes out forward and is formed with the needle stand connecting portion that is circle hitching post build formula, and the fitting portion of this needle stand corresponds to this needle stand connecting portion and formed in groove body in rearward end.
21., according to claim 18 to the needle body needle stand pumpback device of the safety injector according to any one of 20, is characterized in that, this push rod intracavity pushes on the ring wall of end in this medicament contiguous and is formed with one first snap ring.
22. according to the needle body needle stand pumpback device of the safety injector described in claim 21, and it is characterized in that, this push rod intracavity is formed with one second snap ring on the ring wall of this operating side contiguous.
23. according to the needle body needle stand pumpback device of the safety injector described in claim 21, it is characterized in that, this interior airtight gear plug is the post block of step shape and has a protuberance, one plugs together portion and draws the cork groove, before this protuberance and this portion of plugging together lay respectively at this interior airtight gear plug, back segment, the diameter of this protuberance is less than the diameter that this plugs together portion, this needle stand connecting portion is formed at the front end face centre of this protuberance, this geosynclinal concave of drawing the cork falls into and is formed at the rear end face centre that this plugs together portion, this periphery wall plugging together portion is around being arranged with an annular groove, this plugs together portion is equipped in this movable push bar the first snap ring with this annular groove correspondence, this protuberance is airtight is sticked in the internal perisporium that this medicament pushes end.
The needle body needle stand pumpback device of 24. safety injectors according to claim 23, it is characterized in that, the medicament of this movable push bar pushes end formation one ring sleeve portion, this exogenous QI crammed plug is corresponding airtight be sleeved on this ring sleeve portion and this interior airtight gear plug protuberance and can airtight slippage in the cylinder intracavity of this cylindrical shell.
25. according to the needle body needle stand pumpback device of the safety injector described in claim 23, it is characterized in that, exogenous QI crammed plug and this medicament of this pushing piece push to be held airtight joint and is correspondingly sleeved on this and interiorly airtightly keeps off the protuberance filled in, and can slippage airtightly in the cylinder intracavity of this cylindrical shell.
The needle body needle stand pumpback device of 26. safety injectors according to claim 23, it is characterized in that, medicament in this movable push bar pushes the internal perisporium of end around being convexly equipped with an internal ring, the periphery wall of the protuberance of this interior airtight gear plug is around being provided with a concave ring groove, and this protuberance is with this concave ring groove correspondence and airtight this medicament being sticked in this movable push bar pushes the internal ring held.
27. according to the needle body needle stand pumpback device of the safety injector described in claim 23, it is characterized in that, the medicament of this movable push bar pushes end formation one screw part, and this exogenous QI crammed plug and this medicament push to hold and airtightly screw togather and be correspondingly sticked in this and interiorly airtightly keep off the protuberance filled in, and can slippage airtightly in the cylinder intracavity of this cylindrical shell.
28. according to the needle body needle stand pumpback device of the safety injector described in claim 27, it is characterized in that, the protuberance of this interior airtight gear plug and this plug together portion and can be decomposed into a convex section and the section of plugging together, and mutually can screw togather and be integrated and form this interior airtight gear plug, exogenous QI crammed plug is airtight engages for periphery wall and this of this convex section, and its front end face forms this needle stand connecting portion, end face forms a screw part thereafter; This section of plugging together front end to should convex section screw part and form a spiro union portion, and closely can screw togather with this screw part and be integrated, its periphery wall is around being arranged with an annular groove, and this section of plugging together is with corresponding airtight the first snap ring being equipped in this push rod chamber of this annular groove.
The needle body needle stand pumpback device of 29. safety injectors according to claim 21, it is characterized in that, the pull bar of this pumpback part is the stock body that periphery is formed with multiple rib, its two ends are respectively this block end and this holding end, this block end is positioned at the front end of this pull bar and is provided with multiple interval and arranges and the fixing bulge loop being surrounded on this pull bar, this holding end is positioned at the rear end of this pull bar and passes this end cap, this pull bar is provided with a depression breach at this fixing bulge loop rear contiguous, and this depression breach forms the point of application that this pull bar fractures.
The needle body needle stand pumpback device of 30. safety injectors according to claim 29, it is characterized in that, the clamping ring edge that one is overhead kick shape is equipped with between the fixing bulge loop of this pull bar and this depression breach, and forming a locking edge in the Single port ring wall of shielding and sustain pipe of this end cap, the clamping ring edge of this pull bar correspondence can be snapped in this locking edge.
The needle body needle stand pumpback device of 31. safety injectors according to claim 30, it is characterized in that, this this pull bar block end of pumpback part mat engages this airtight plug sleeve, and pulled back by this holding end and move this pumpback part, make the clamping ring edge of this pull bar be locked to the locking edge of this end cap, and produce the vacuum attraction energy in a low pressure space, pole in this push rod intracavity.
The needle body needle stand pumpback device of 32. safety injectors according to claim 29, it is characterized in that, this this pull bar block end of pumpback part mat engages this airtight plug sleeve, and pulled back by this holding end and move this pumpback part, make this airtight plug sleeve be equipped in the second snap ring of this push rod cavity rear end, and produce the vacuum attraction energy in a low pressure space, pole in this push rod intracavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410316830.5A CN105214181B (en) | 2014-07-04 | 2014-07-04 | Safety injector and its needle body needle stand pumpback device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410316830.5A CN105214181B (en) | 2014-07-04 | 2014-07-04 | Safety injector and its needle body needle stand pumpback device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105214181A true CN105214181A (en) | 2016-01-06 |
| CN105214181B CN105214181B (en) | 2018-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410316830.5A Expired - Fee Related CN105214181B (en) | 2014-07-04 | 2014-07-04 | Safety injector and its needle body needle stand pumpback device |
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| Country | Link |
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| CN (1) | CN105214181B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092803A (en) * | 2021-05-19 | 2021-07-09 | 青岛瑞斯凯尔生物科技有限公司 | Special device and method for accurate anti-bubble analysis instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1199344A (en) * | 1995-08-22 | 1998-11-18 | Mdc投资控股公司 | Pre-filled retractable needle injection ampoules |
| CN1244811A (en) * | 1996-11-15 | 2000-02-16 | 阿登文泰克公司 | Syringe with retractable needle assembly |
| US6186980B1 (en) * | 1999-10-07 | 2001-02-13 | Sanofi-Synthelabo | Single-use device for injection |
| CN1421248A (en) * | 2001-11-28 | 2003-06-04 | 萨克哈拉姆D.马赫卡 | Disposible safety syringe with improved retractable needle |
| CN101088570A (en) * | 2006-06-13 | 2007-12-19 | 许明正 | Disposable injector |
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2014
- 2014-07-04 CN CN201410316830.5A patent/CN105214181B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1199344A (en) * | 1995-08-22 | 1998-11-18 | Mdc投资控股公司 | Pre-filled retractable needle injection ampoules |
| CN1244811A (en) * | 1996-11-15 | 2000-02-16 | 阿登文泰克公司 | Syringe with retractable needle assembly |
| US6186980B1 (en) * | 1999-10-07 | 2001-02-13 | Sanofi-Synthelabo | Single-use device for injection |
| CN1421248A (en) * | 2001-11-28 | 2003-06-04 | 萨克哈拉姆D.马赫卡 | Disposible safety syringe with improved retractable needle |
| CN101088570A (en) * | 2006-06-13 | 2007-12-19 | 许明正 | Disposable injector |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092803A (en) * | 2021-05-19 | 2021-07-09 | 青岛瑞斯凯尔生物科技有限公司 | Special device and method for accurate anti-bubble analysis instrument |
| CN113092803B (en) * | 2021-05-19 | 2022-11-29 | 青岛瑞斯凯尔生物科技有限公司 | Special device and method for accurate anti-bubble analysis instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105214181B (en) | 2018-06-26 |
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