CN2820208Y - Safety syringe - Google Patents
Safety syringe Download PDFInfo
- Publication number
- CN2820208Y CN2820208Y CN 200520086865 CN200520086865U CN2820208Y CN 2820208 Y CN2820208 Y CN 2820208Y CN 200520086865 CN200520086865 CN 200520086865 CN 200520086865 U CN200520086865 U CN 200520086865U CN 2820208 Y CN2820208 Y CN 2820208Y
- Authority
- CN
- China
- Prior art keywords
- core
- needle holder
- ring
- core bar
- rear portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000013016 damping Methods 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 230000008961 swelling Effects 0.000 claims description 7
- 238000002347 injection Methods 0.000 abstract description 14
- 239000007924 injection Substances 0.000 abstract description 14
- 230000006378 damage Effects 0.000 abstract description 3
- 210000000078 claw Anatomy 0.000 abstract 1
- 206010042674 Swelling Diseases 0.000 description 6
- 206010011409 Cross infection Diseases 0.000 description 3
- 206010029803 Nosocomial infection Diseases 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model relates to a safety syringe which comprises an outer sleeve, a needle head seat, a sealing ring, a piston and a core rod, wherein the needle head seat is movably arranged in a cylindrical hole at the front part of the outer sleeve, the back part of the needle head seat is provided with a hollow cavity, an expanding core is arranged in the hollow cavity, the middle of the expanding core is provided with an elastic damping claw, the front part of the core rod penetrates through the piston and the exposed part is matched with the expanding core. The outer part of the outer sleeve is provided with a locking ring, the outer wall of the locking ring is provided with a retreat stopping boss, the inner wall is provided with a positioning groove, the inner wall of the outer sleeve is correspondingly provided with a retreat stopping boss and the core rod is provided with a positioning boss matched with the positioning groove. After injection, the front part of the core rod is fixed in the hollow cavity of the expanding core, the core rod is drawn to drive the expanding core, the needle head seat, etc. to backwards move, the expanding core, the needle head seat, etc. are drawn in the outer sleeve, the core rod is locked by the locking ring so that the expanding core, the needle head seat, etc. can not be forwards moved and can not be backwards drawn. The utility model has the advantages of simple structure, convenient use, good safety performance and self destruction after one-time injection.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, specifically a kind of safety injector.
Background technology
We know that syringe is a kind of medical apparatus commonly used.It generally comprises syringe, piston, push rod, syringe needle.In order to prevent cross infection, disposable use more and more is subject to people's attention.But present widely used disposable syringe belongs to managerial notion, is not " disposable " on the serviceability, can repeated multiple times use, and leaves hidden danger to cross infection, and propagation tends to produce the disease of.In addition, injection finishes in processing procedure subsequently, because outside syringe needle was exposed to mostly, very easily thorn scratched hospitalized patients, causes new cross infection.Patent 00205827.8 discloses a kind of safety injector, by syringe, needle holder, sealing ring, rubber piston and push rod are formed, the syringe front end has cylindrical hole, needle holder is to slide and packs in the syringe cylindrical hole, realize airtight by sealing ring, the needle holder rear end is the puncture cone of band handle, be easy to wear out the rubber piston thin film region at the injection terminal point, agree with the collet of push rod front end in the piston, needle holder is drawn in the syringe together with injection needle, can realize disposable use self-destruction like this, but because that syringe and needle holder are provided with step is spacing, design, it is reasonable inadequately to connect, and needle holder is easily rotated, and syringe needle can not be changed, the assembling difficulty, to the strictness of sealing ring dimensional requirement, serviceability is stable inadequately, and the debris surplus is many.Patent 01243599.6 provides a kind of disposable syringe safe in utilization, it is axially arranged with some strip bulges at overcoat nose circle post hole inwall, the sealing ring front portion correspondingly is axially arranged with some strip grooves on the needle holder outer wall, during use, needle holder can not rotated, after injection finished, the overcoat rear end also was provided with piston and push pedal locking mechanism, but this mechanism retaining performance is stable inadequately.
Summary of the invention
Technical problem to be solved in the utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of simple structure is provided, and is easy to use, stable, the retaining dependable performance, and security performance is good, is the safety injector of self-destruction after the shot.
The technical scheme in the invention for solving the above technical problem is: a kind of safety injector, it comprises overcoat, needle holder, sealing ring, piston, core bar, there is cylindrical hole the overcoat front portion, during needle holder is movably arranged in the anterior cylindrical hole of overcoat, which is provided with O-ring seal, piston is fixed on the core bar front portion, it is characterized in that: the needle holder rear portion is provided with cavity, one bloated core is installed in it, the tight swelling of crown ring-like projection at bloated core rear portion is at needle holder cavity rear portion, be axially arranged with the elastic damping pawl on the bloated intermediary ring groove wall of core, piston is passed in the core bar front portion, the shape of exposed portions serve is consistent with the cavity of bloated core, and the core bar front end is provided with boss, matches with elastic damping pawl in the bloated core; The overcoat rear portion is equipped with locking ring, locking ring rear portion circumference door is provided with cross core bar gathering sill, be axially arranged with open slot on the anterior circumferential wall, the intermediate circumference outer wall is provided with the retaining boss of band tapering, correspondingly be provided with a retaining boss that is mated on the outer casing inner wall circumference, also be provided with detent on the locking ring inwall circumference, correspondingly be provided with a positioning boss that is mated on the core bar.
Bloated core described in the utility model rear and front end is provided with ring-like projection, and the centre is ring groove, and needle holder cavity inboard correspondingly is provided with positive stop lug boss, and expand core and needle holder draw-in groove are fixed.
Needle holder rear outside described in the utility model is provided with the ring-type positioning convex, the ring-like locating slot that the rear end of the anterior cylindrical hole of overcoat is provided with, and the two is connected.
The bloated core lateral symmetry of elastic damping pawl on the bloated core described in the utility model is provided with, and is flat, and the crown ring-like projection at tail end and bloated core rear portion fuses, and front end tilts to the inside.
Bloated core described in the utility model is provided with the consistent concave cone face of tapering with needle holder cavity rear portion, and the piston front portion correspondingly is provided with the convex cone face of tapering unanimity.
Needle holder described in the utility model rear portion is provided with break slot.
Also be provided with the elasticity limiting plate on the cross gusset of core bar described in the utility model, elasticity limiting plate and core bar integrative-structure, the rear portion links to each other with the notch rear portion that the cross gusset of core bar is provided with, and the front portion is provided with a boss.
Core bar described in the utility model is provided with a frangibility weak area.
Positioning boss on the core bar described in the utility model is between push pedal and weak area.
The rear portion of push pedal has radian on the core bar described in the utility model, the corresponding cancave cambered surface that is provided with of locking ring front inner wall circumference.
This utility model needle holder rear portion is installed and to be connected with bloated core, connects core bar by the elastic damping ZHUANLIAN of the core that expands; The overcoat rear end is mounted with locking ring, and adopts locking ring locking core bar, piston etc.Against existing technologies, after injection finished, the core bar front portion was fixed in the core cavity that expands, and the pulling core bar can drive bloated core, needle holder etc. and move backward, and they are drawn in the overcoat; Then, they can not be moved forward, can not pull back by locking ring locking core bar, and the core bar that can fracture by the weak area on the core bar.Can realize self-destruction after the shot, the damage reliable in function, this utility model simple structure, easy to use, stable, security performance is good.
Description of drawings
Below in conjunction with drawings and Examples this utility model is further specified.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of this utility model overcoat;
Fig. 3 is the structural representation of this utility model core bar;
Fig. 4 is that the A-A of Fig. 3 is to sketch map;
Fig. 5 is the structural representation of this utility model needle holder;
Fig. 6 is the structural representation of the bloated core of this utility model;
Fig. 7 is that the B-B of Fig. 6 is to sketch map;
Fig. 8 is the structural representation of this utility model locking ring;
Fig. 9 is that the C of Fig. 8 is to sketch map.
1. needle holder among the figure, 2. sealing ring, core, 4. piston, 5. overcoat, 6. core bar, 7. locking ring 3. expand.
The specific embodiment
As can be seen from Figure 1, a kind of safety injector of this utility model, it comprises needle holder 1, sealing ring 2, piston 4, overcoat 5, core bar 6 etc.There is cylindrical hole overcoat 5 front portions, and needle holder 1 is used for installing and connects injection needle, and it is movably arranged in the overcoat 5 forward cylindrical holes, and are airtight by sealing ring 2 realizations, to prevent the liquid outflow.Piston 5 is better elastic bodies, and it is fixed on core bar 6 front portions, and its front end shape is consistent with overcoat inner chamber front end shape, can reduce the residual liquid amount of injection so effectively.The above-mentioned The Nomenclature Composition and Structure of Complexes prior art of this utility model is basic identical, is not giving unnecessary details.
As can be seen, needle holder 1 rear portion is provided with a cavity 11 from Fig. 1, Fig. 5, Fig. 6, Fig. 7, and the penetrating bloated core 3 of a hollow is installed in it, and core 3 external forms that expand are consistent with needle holder 1 cavity 11.Bloated core 3 rear and front ends are provided with ring-like protruding 31,34, the centre is ring groove 32, and needle holder 1 cavity inboard correspondingly is provided with positioning boss 12, and the core 3 that expands is fixed with needle holder 1 draw-in groove, ring-like protruding 34 of core 3 front ends that promptly expand are crossed positioning boss 12, and draw-in groove cooperates fixing mutually.The crown ring-like protruding 31 tight swellings at bloated core 3 rear portions are at needle holder 1 cavity rear portion.Needle holder described in the utility model 1 rear portion is provided with break slot 15, can make it possess sufficient elasticity like this, and after bloated core 3 crown ring-like protruding 31 swellings, needle holder 1 is fixed in the overcoat 2 forward cylindrical holes reliably.Be axially arranged with two elastic damping pawls 33 on core 3 intermediary ring groove 32 circumferential wall that expand, be provided with in bloated core lateral symmetry, be flat, crown ring-like protruding 31 of tail end and bloated core 3 rear portions fuse, and front end tilts to the inside.Elastic damping pawl 33 is flat, has good elasticity, and tilts to the inside, and it agrees with swelling in needle holder 1 rear cavity together with crown ring-like protruding 31 on the one hand, and needle holder 1 closely is fixed in overcoat 2 front portions; On the other hand, its can with boss 61 engagement connections of core bar 6 front ends, can drive interlock by core bar 6.
Bloated core 3 described in the utility model is provided with the consistent concave cone face 35 of tapering with needle holder 1 cavity rear portion, and piston 4 front portions correspondingly are provided with the convex cone face 41 of tapering unanimity.As shown in Figure 1.Like this, can reduce medicinal liquid residual quantity after the injection effectively.
Among Fig. 1, Fig. 2, Fig. 5, needle holder 1 rear outside is provided with ring-type positioning convex 13, the ring-like locating slot 21 that the rear end of overcoat 2 anterior cylindrical holes is provided with, and the two is fixedly connected.Also can be to be provided with positioning convex on overcoat 2 inwall circumference, needle holder 1 rear outside correspondingly be provided with locating slot, and the two cooperates fixing.
By it can also be seen that among Fig. 1, Fig. 3, piston 4 is passed in core bar 6 front portions, and the part of exposing is consistent with the cavity of bloated core 3, and core bar 6 front ends are provided with boss 61, matches engagement connection, spacing, interlock with elastic damping pawl 33 in the bloated core 3.Core bar 6 moves after can driving the core 3 that expands, move behind the elastic damping pawl 33 and crown ring-like protruding 31 and break away from needle holder 1 rear cavity, no longer swelling is in needle holder 1 rear cavity, and then cooperate with the positioning boss 12 of needle holder 1 by ring-like protruding 34 of core 3 front ends that expand, move after driving whole needle holder 1, break away from overcoat 5 forward cylindrical holes, enter in the overcoat.
By it can also be seen that among Fig. 1, Fig. 8, Fig. 9, this utility model overcoat 5 rear ends also are equipped with locking ring 7.Locking ring 7 rear portion circumference doors 71 are provided with cross core bar gathering sill 72, rear portion circumference door 71 rearward end are the expansion of certain taper, and be provided with dovetail boss 75, this dovetail boss is fastened on the rear port of overcoat 5, with guarantee locking ring 7 can not before move up in the overcoat 2.Be axially arranged with open slot 73 on the locking ring 7 anterior circumferential wall, the intermediate circumference outer wall is provided with the retaining boss 74 of band tapering, correspondingly is provided with a retaining boss 22 that is mated on the outer casing inner wall circumference, as shown in Figure 2.The retaining boss 22 of outer casing inner wall is between retaining boss 74 and dovetail boss 75, and they cooperatively interact, and installs and fixes locking ring 7, and locking ring 7 can not be moved forward, and can not retreat.Consider the needs of installation, locking ring 7 adopts two semi-circular structures of split, and its rear end is provided with cross gathering sill 72, and the cross gusset on the core bar 6 can move along its axis.
Also be provided with detent 76 on this utility model locking ring 7 inwall circumference, correspondingly be provided with a positioning boss that is mated 63 on the core bar 6, as shown in Figure 3.This positioning boss 63 is between push pedal 62 and weak area 64.
Core bar described in the utility model is provided with a frangibility weak area 64.It is the weak area 64 that is provided with at push pedal 62 rear portions in the connection, damages so that separate.
Among Fig. 1, Fig. 3, Fig. 4, also be provided with elasticity limiting plate 65 on the cross gusset of core bar 6.Elasticity limiting plate 65 and core bar 6 integrative-structures, the cross gusset of core bar 6 is provided with a notch, and elasticity limiting plate 65 rear portions link to each other with the gusset at notch rear portion, add man-hour, make connecting portion have certain elasticity.Elasticity limiting plate 65 front portions are provided with a boss, and the short place of boss height flushes with gusset, and projection may be stuck on the locking ring 7 rear portion circumference doors 71.When producing assembling, elasticity limiting plate 65 is used for limiting core bar 6 and enters position in the overcoat 5, and core bar 6 front ends touch the core 3 that expands when avoiding assembling, and cause maloperation; During injection, utilize the elasticity of itself, upwards or lift elasticity limiting plate 65 backward, its restriction is disengaged, and just can realize injecting normally having used.
When this utility model uses injection, promote core bar 6 forward, utilize piston 4 better elastic, promotion, injecting fluid, injection is last, the part that core bar 6 exposes just in time is filled in the cavity of the core 3 that expands, and the boss 61 on the core bar 6 is crossed elastic damping pawl 33, and just in time is fastened on the front portion of elastic damping pawl 33.The core bar front portion just is locked in the core cavity that expands like this.After injection finishes, pull back core bar 6, can drive the core 3 that expands moves backward, ring-like protruding 34 of core 3 front ends that expand cooperate with the positioning boss 12 of needle holder 1, drive the ring-like locating slots 21 of disengaging such as whole needle holder, whole needle holder 1 moves backward, is drawn in the overcoat 2, continue to pull back core bar 6, when pulling back core bar 6 to certain position, the positioning boss 63 of core bar 6 tightly is fastened in the detent 76 of locking ring 7, at this moment, push pedal 62 just in time enters the locking ring front port, like this, the expansion of locking ring 7 open slots 73 front ends, more stably lock piston and core bar and own in overcoat, they can not be moved forward, can not pull back.At this moment, can realize separating self-destruction by the weak area on the core bar 6 64 core bar that fractures, whole needle holder etc. are enclosed in the overcoat.Can realize self-destruction after the shot, realize real disposable use.
Claims (10)
1. safety injector, it comprises overcoat, needle holder, sealing ring, piston, core bar, there is cylindrical hole the overcoat front portion, during needle holder is movably arranged in the anterior cylindrical hole of overcoat, which is provided with O-ring seal, piston is fixed on the core bar front portion, it is characterized in that: the needle holder rear portion is provided with cavity, one bloated core is installed in it, and the tight swelling of crown ring-like projection at the core rear portion of expanding is axially arranged with the elastic damping pawl at needle holder cavity rear portion on the intermediary ring groove wall of core that expands, piston is passed in the core bar front portion, the shape of exposed portions serve is consistent with the cavity of bloated core, and the core bar front end is provided with boss, matches with elastic damping pawl in the bloated core; The overcoat rear portion is equipped with locking ring, locking ring rear portion circumference door is provided with cross core bar gathering sill, be axially arranged with open slot on the anterior circumferential wall, the intermediate circumference outer wall is provided with the retaining boss of band tapering, correspondingly be provided with a retaining boss that is mated on the outer casing inner wall circumference, also be provided with detent on the locking ring inwall circumference, correspondingly be provided with a positioning boss that is mated on the core bar.
2. safety injector according to claim 1 is characterized in that: described bloated core rear and front end is provided with ring-like projection, and the centre is ring groove, and needle holder cavity inboard correspondingly is provided with positive stop lug boss, and expand core and needle holder draw-in groove are fixed.
3. safety injector according to claim 1 is characterized in that: described needle holder rear outside is provided with the ring-type positioning convex, the ring-like locating slot that the rear end of the anterior cylindrical hole of overcoat is provided with, and the two is connected.
4. safety injector according to claim 1 is characterized in that: the bloated core lateral symmetry of the elastic damping pawl on the described bloated core is provided with, and is flat, and the crown ring-like projection at tail end and bloated core rear portion fuses, and front end tilts to the inside.
5. safety injector according to claim 1 is characterized in that: described bloated core is provided with the consistent concave cone face of tapering with needle holder cavity rear portion, and the piston front portion correspondingly is provided with the convex cone face of tapering unanimity.
6. safety injector according to claim 1 is characterized in that: described needle holder rear portion is provided with break slot.
7. safety injector according to claim 1 is characterized in that: also be provided with the elasticity limiting plate on the cross gusset of described core bar.
8. safety injector according to claim 1 is characterized in that: described core bar is provided with a frangibility weak area.
9. safety injector according to claim 1 is characterized in that: the positioning boss on the described core bar is between push pedal and weak area.
10. safety injector according to claim 1 is characterized in that: the rear portion of push pedal has radian on the described core bar, the corresponding cancave cambered surface that is provided with of locking ring front inner wall circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520086865 CN2820208Y (en) | 2005-09-09 | 2005-09-09 | Safety syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520086865 CN2820208Y (en) | 2005-09-09 | 2005-09-09 | Safety syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2820208Y true CN2820208Y (en) | 2006-09-27 |
Family
ID=37016757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520086865 Expired - Lifetime CN2820208Y (en) | 2005-09-09 | 2005-09-09 | Safety syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2820208Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009097742A1 (en) * | 2008-02-04 | 2009-08-13 | Dongsen Fang | Safe injector |
| WO2009097743A1 (en) * | 2008-02-04 | 2009-08-13 | Dongsen Fang | Core rod locking device for safety syringe |
| WO2009100644A1 (en) * | 2008-02-04 | 2009-08-20 | Dongsen Fang | Automatic retracting safe injector |
| WO2009140801A1 (en) * | 2008-05-22 | 2009-11-26 | Lin Zuoqian | New safe latching type self-destroying syringe |
| CN101628139B (en) * | 2009-08-19 | 2012-03-14 | 江振标 | Lock structure of safety self-destruction injector |
-
2005
- 2005-09-09 CN CN 200520086865 patent/CN2820208Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009097742A1 (en) * | 2008-02-04 | 2009-08-13 | Dongsen Fang | Safe injector |
| WO2009097743A1 (en) * | 2008-02-04 | 2009-08-13 | Dongsen Fang | Core rod locking device for safety syringe |
| WO2009100644A1 (en) * | 2008-02-04 | 2009-08-20 | Dongsen Fang | Automatic retracting safe injector |
| CN101249291B (en) * | 2008-02-04 | 2010-06-09 | 房东森 | Safety syringe |
| WO2009140801A1 (en) * | 2008-05-22 | 2009-11-26 | Lin Zuoqian | New safe latching type self-destroying syringe |
| EP2279771A1 (en) * | 2008-05-22 | 2011-02-02 | Sol-Millennium Medical Products Co., Ltd. | New safe latching type self-destroying syringe |
| EP2279771A4 (en) * | 2008-05-22 | 2013-05-22 | Sol Millennium Medical Products Co Ltd | New safe latching type self-destroying syringe |
| US8608694B2 (en) | 2008-05-22 | 2013-12-17 | Sol-Millennium Medical Products Co., Ltd | Self-locking self-destroying safety syringe |
| CN101628139B (en) * | 2009-08-19 | 2012-03-14 | 江振标 | Lock structure of safety self-destruction injector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150909 Granted publication date: 20060927 |
|
| EXPY | Termination of patent right or utility model |