CN102989061A - Disposable syringe - Google Patents
Disposable syringe Download PDFInfo
- Publication number
- CN102989061A CN102989061A CN2012105095564A CN201210509556A CN102989061A CN 102989061 A CN102989061 A CN 102989061A CN 2012105095564 A CN2012105095564 A CN 2012105095564A CN 201210509556 A CN201210509556 A CN 201210509556A CN 102989061 A CN102989061 A CN 102989061A
- Authority
- CN
- China
- Prior art keywords
- syringe
- rubber plug
- seal rubber
- push rod
- cell wall
- 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.)
- Pending
Links
Images
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a disposable syringe comprising a needle cylinder, a push rod and a needle head, wherein the push rod is arranged in the needle cylinder, and a sealing rubber plug is sheathed at the front end of the push rod. The disposable syringe is characterized in that a limiting groove is formed in the tail end of the needle cylinder close to the tail end; the rear groove wall of the limiting groove, corresponding to the cylinder opening side, is higher than the front groove wall on the other side by 0.1mm-0.35mm; the external edge of the sealing rubber plug is provided with at least one sealing rib and a bottom punching edge; the punching edge is in interference fit with the rear groove wall, and the magnitude of interference is 0.1-0.3mm; the sealing rib is in interference fit with the front groove wall, and the magnitude of interference is 0.1mm-0.3mm; and the width of the limiting groove is more than or equal to the distance from the punching edge to the sealing rib, and the shore hardness of the sealing rubber plug is 40 degrees-100 degrees. According to the disposable syringe, the matching between the sealing rubber plug and the limiting groove is utilized to replace the conventional limiting structure, so that the structure is simplified, the disposable safe use of the syringe is realized, and the syringe is easy to assemble.
Description
Technical field
The present invention relates to a kind of medical apparatus and instruments, relate in particular to a kind of disposable syringe.
?
Background technology
Growing along with medical industry, hygienic requirements to medical apparatus and instruments is also more and more higher, syringe has accounted for a very large part in medical apparatus and instruments, for avoiding to the input of the mankind or animal or cross infection occuring when taking out medium, disposable syringe already is widely used at modern medicine as the medical apparatus and instruments of routine, namely processes as hospital refuse after using.
Syringe usually by a hollow barrel, be installed in push rod in the hollow barrel, the syringe needle of deciding the journey piston and being positioned at the push rod front end that is fitted in the syringe forms, syringe inwall and piston interference fit form enclosed space, liquid are sucked or releases syringe.In the prior art, extract piston out syringe when pulling back for anti-throw-out lever, back end of syringe (with respect to syringe needle) inwall is provided with annular groove, the both sides of annular groove form spacing preiection, the height of projection of described both sides spacing preiection is identical, the push rod front end is provided with the limited step corresponding with spacing preiection, and when push rod was pulled back, limited step was limited after falling in the annular groove.
Although it is limited that limited step falls into behind the annular groove, just under larger pulling force, can be drawn out, therefore can not realize disposable use fully, occur for fear of this type of situation, the snap close blade construction has appearred, replace in the past simple limited step structure, the snap close blade is by upper, lower blade forms, as shown in Figure 1, on, lower blade is arranged symmetrically with, the opposing bending of blade when blade enters annular groove, launches blade and props up up and down the annular groove wall like this, namely lock push rod, general pulling force all can't be pulled out push rod, both has been to apply larger pulling force, has pulled out push rod, the reverse stressed bending of snap close blade, just can fracture, so pull out push rod and also can't re-use, guarantee the disposable use of syringe.
Yet above-mentioned snap close blade construction can be guaranteed the safety in utilization of " disposable ", but when syringe production and assembling, difficulty all occurred.Molding snap close blade construction will inevitably increase mould, improves production cost; Simultaneously, when assembling, push rod inserts in the process of syringe, owing to have certain magnitude of interference between snap close blade and the syringe inwall, the assembling difficulty is increased, and easily produces blade and fractures when assembling, and percent defective is higher, wastes larger.
?
Summary of the invention
The object of the invention provides a kind of disposable syringe, and the improvement by structure simplifies the structure, and has reduced production cost, is easy to assembling, reduces the generation of defective products.
For achieving the above object, the technical solution used in the present invention is: a kind of disposable syringe, comprise syringe, push rod and syringe needle, described push rod is arranged in the syringe, the push rod front end sleeve is provided with seal rubber plug, it is characterized in that: described syringe is provided with limited impression near tail end, and the rear cell wall of the corresponding nozzle side of this limited impression is higher than front cell wall 0.1 ㎜ of opposite side～0.35 ㎜; Described seal rubber plug outer edge surface is provided with the die-cut limit of at least one sealed muscle and bottom, described die-cut limit and described rear cell wall are interference fit, the magnitude of interference is 0.1 ㎜～0.3 ㎜, the width of described limited impression is more than or equal to the distance of described die-cut limit to described sealed muscle, and the shore hardness of described seal rubber plug is between 40 degree～100 degree.
In the technique scheme, described seal rubber plug has 1～2 sealed muscle usually, and sealed muscle is used for and the syringe inner wall sealing, prevents the seepage of medicinal liquid.In the present invention, seal rubber plug adopts shore hardness rubber between 40 degree～100 degree to consist of, the seal rubber plug bottom is die-cut limit, cell wall interference fit behind die-cut limit and the limited impression, pull back during push rod when injection is complete, seal rubber plug is through limited impression, and die-cut checkpost is on rear cell wall, fall within the limited impression, can't be pulled out again; Again because of seal rubber plug sealed muscle and described syringe inner wall sealing, thus the inevitable internal diameter greater than front cell wall place of the external diameter of sealed muscle, when seal rubber plug falls into limited impression, also just can not be pushed into, make push rod stuck in limited impression.Utilize the structure of seal rubber plug replacement limit rib in the past and so on, simplified the structure of syringe, reduced production cost; Simultaneously, seal rubber plug has certain elasticity, in when assembling, but fills in after the crimp in syringe, restores to the original state after entering syringe, forms sealing, has avoided the in the past problem that fractures of blade construction, improves yield rate, cuts the waste.
In the technique scheme, described syringe inwall is provided with concave slideway and cannelure, be provided with limited step between described concave slideway and the cannelure, slidely connect an outer sleeve in the described concave slideway, be provided with an inner sleeve in the described cannelure, gap between described outer sleeve and the described inner sleeve consists of described limited impression, the inner edge surface of described outer sleeve is a conical surface, and corresponding to the interior Zhou Jing of the described inner sleeve side interior Zhou Jing less than described inner sleeve, consist of described rear cell wall, described inner sleeve consists of described front cell wall with respect to the end face of outer sleeve side.
Further technical scheme is, described inner sleeve is provided with guiding surface with respect to the other end inwall of outer sleeve, and this guiding surface is connected with described syringe inwall.
In the technique scheme, consist of the forward and backward cell wall of limited impression by inner and outer sleeves, utilize the conical surface on the outer sleeve inner edge surface, when the assembling push rod, for seal rubber plug provides guiding, outer sleeve slides along the concave slideway, and seal rubber plug is pushed to the inner sleeve place, make the seal rubber plug state that remains retracted, avoid being stuck in the limited impression; And when push rod is pulled back, seal rubber plug is by inner sleeve the time, by the guiding surface on the inner sleeve, pass through inner sleeve, behind seal rubber plug process inner sleeve, because outer sleeve is corresponding to the interior Zhou Jing of the described inner sleeve side interior Zhou Jing less than described inner sleeve, the internal diameter of syringe that can see the push rod process as is reduced, therefore the die-cut limit of seal rubber plug bottom is butted on the outer sleeve end face, drive outer sleeve and move to syringe tail end open side along the concave slideway, thereby in, form the gap between the outer sleeve and consist of described limited impression, seal rubber plug falls within this limited impression, and be original deployed condition, sealed muscle is butted on the inner sleeve end face, and the lower surface on die-cut limit is butted on the outer sleeve end face, and outer sleeve is after moving to the concave ways-end, be butted on the concave ways-end wall, can't deviate from syringe, therefore, push rod enters stuck state, the operation that can't push away or draw, " disposable " that consist of syringe uses.
In the technique scheme, described seal rubber plug outer edge surface top is provided with the first sealed muscle, and the centre is the second sealed muscle, and the bottom is die-cut limit, and the width of described limited impression matches with the distance of described die-cut limit to described the first sealed muscle.
Preferred technical scheme is, the shore hardness of described seal rubber plug is between 50 degree～70 degree, and the sealing when so both having guaranteed injection has guaranteed that also push rod pulls back Shi Buhui because of too soft and be out of shape excessively, directly pulls out syringe.
Because technique scheme is used, the present invention compared with prior art has following advantages:
1, on the syringe limited impression is set among the present invention, after seal rubber plug fell into limited impression, die-cut limit was butted on the rear cell wall, and sealed muscle is butted on the front cell wall, formation is spacing to the front and back of push rod, replace limit rib structure in the past, utilize simultaneously the difference in height of forward and backward cell wall, make seal rubber plug be easy to assembling and push, can not be drawn out with same power, thereby stopped the possibility that syringe reuses, guaranteed syringe " disposable " safety in utilization, effectively avoided cross infection;
2, in the syringe inner and outer sleeves is set, consist of respectively the forward and backward cell wall of limited impression, during assembling, by the slip of outer sleeve in the syringe slideway, and the guiding of guiding surface on the inner sleeve, to the pushing and pull out and tighten up of seal rubber plug, the seal rubber plug distortion is shunk, avoid stuck, and in use, seal rubber plug launches, and falls in the gap between outer sleeve and the inner sleeve, spacing accurate, compare with structure in the past, utilize the elasticity of seal rubber plug, make easy to assembly, avoid the generation of scrap, reduce production costs;
3, among the present invention, the shore hardness of seal rubber plug is between 40 degree～100 degree, and the sealing when both having guaranteed injection has guaranteed that also push rod pulls back Shi Buhui because too soft and be out of shape excessively, directly pulls out syringe.
?
Description of drawings
Fig. 1 is the structural representation in the embodiment of the invention one;
Fig. 2 is the partial enlarged drawing of Fig. 1;
Fig. 3 is the syringe cylinder structure sketch map in the embodiment of the invention one;
Fig. 4 is the partial enlarged drawing of Fig. 3;
Fig. 5 is the structural representation in the embodiment of the invention two;
Fig. 6 is the user mode structural representation in the embodiment of the invention two;
Fig. 7 is the partial enlarged drawing of Fig. 6;
Fig. 8 is the syringe cylinder structure sketch map in the embodiment of the invention two;
Fig. 9 is the partial enlarged drawing of Fig. 8.
Wherein: 1, syringe; 2, push rod; 3, syringe needle; 4, seal rubber plug; 5, limited impression; 6, rear cell wall; 7, front cell wall; 8, the first sealed muscle; 9, the second sealed muscle; 10, die-cut limit; 11, concave slideway; 12, cannelure; 13, limited step; 14, outer sleeve; 15, inner sleeve; 16, the conical surface; 17, guiding surface.
?
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples:
Embodiment one: shown in Fig. 1～4, a kind of disposable syringe, comprise syringe 1, push rod 2 and syringe needle 3, described push rod 2 is arranged in the syringe 1, push rod 2 front end sleeves are provided with seal rubber plug 4, described syringe 1 is provided with limited impression 5 near tail end, and the front cell wall 7 that the rear cell wall 6 of the corresponding nozzle side of this limited impression 5 is higher than opposite side has 0.2 ㎜; Described seal rubber plug 4 outer edge surface tops are provided with the first sealed muscle 8, the centre is the second sealed muscle 9, the bottom is die-cut limit 10, the width of described limited impression 5 matches with the distance of described die-cut limit 10 to described the first sealed muscle 8, described die-cut limit 10 is 0.1 ㎜ with described rear cell wall 6 for the monolateral magnitude of interference of interference fit, and described seal rubber plug 4 adopts the rubber of shore hardness 45 degree to consist of.
When syringe is assembled, utilize the elasticity of seal rubber plug 4, distortion is shunk, and enters syringe 1 rear expansion, and the first sealed muscle 8, the second sealed muscle 9 and syringe 1 inner wall sealing are finished assembling.To be injected complete after, push rod 2 is pulled back, the die-cut limit 10 of seal rubber plug 4 bottoms is through front cell wall 7, seal rubber plug 4 contraction distortions, when arriving rear cell wall 6, because the height of rear cell wall 6 is greater than front cell wall 7, thereby the barrel dliameter that hollow syringe 1 is strutted can't satisfy die-cut limit 10 by the needs of rear cell wall 6, and seal rubber plug 4 just is stuck, and falls in the limited impression 5,10 lower surfaces, die-cut limit are butted on the upper surface of rear cell wall 6, seal rubber plug 4 launches, and the first sealed muscle 8 is butted on the lower surface of front cell wall 7, can not continue to pull back, can not promote forward, push rod 2 is locked spacing.
Embodiment two: shown in Fig. 5～9, a kind of disposable syringe, comprise syringe 1, push rod 2 and syringe needle 3, described push rod 2 is arranged in the syringe 1, push rod 2 front end sleeves are provided with seal rubber plug 4, described syringe 1 is provided with limited impression 5 near tail end, and the rear cell wall of the corresponding nozzle side of this limited impression 5 is higher than front cell wall 0.3 ㎜ of opposite side; Described seal rubber plug 4 outer edge surface tops are provided with the first sealed muscle 8, the centre is the second sealed muscle 9, the bottom is die-cut limit 10, the width of described limited impression 5 matches with the distance of described die-cut limit 10 to described the second sealed muscle 9, described die-cut limit 10 is that the monolateral magnitude of interference of interference fit is 0.3 ㎜ with described rear cell wall, and described seal rubber plug 4 adopts the rubber-moulding of shore hardness 60 degree to consist of; Described syringe 1 inwall is provided with concave slideway 11 and cannelure 12, be provided with limited step 13 between described concave slideway 11 and the cannelure 12, slidely connect an outer sleeve 14 in the described concave slideway 11, be provided with an inner sleeve 15 in the described cannelure 12, gap between described outer sleeve 14 and the described inner sleeve 15 consists of described limited impression 5, the inner edge surface of described outer sleeve 14 is a conical surface 16, and corresponding to the interior Zhou Jing of the described inner sleeve 15 sides interior Zhou Jing less than described inner sleeve 15, consist of described rear cell wall, described inner sleeve 15 consists of described front cell wall with respect to the end face of outer sleeve 14 sides, described inner sleeve 15 is provided with guiding surface 17 with respect to the other end inwall of outer sleeve 14, this guiding surface 17 is connected with described syringe 1 inwall, is convenient to seal rubber plug 4 and passes through inner sleeve 15 when retracting.
During assembling, when push rod 2 pushed fast, outer sleeve 14 slided along concave slideway 11, and seal rubber plug 4 is pushed to inner sleeve 15 places, made seal rubber plug 4 state that remains retracted, and avoided being stuck in the limited impression 5; And when push rod 2 is pulled back, seal rubber plug 4 is by inner sleeve 15 time, by the guiding surface 17 on the inner sleeve 15, by inner sleeve 15, behind seal rubber plug 4 process inner sleeves 15, because outer sleeve 14 is corresponding to the interior Zhou Jing of the described inner sleeve 15 sides interior Zhou Jing less than described inner sleeve, the internal diameter of syringe 1 that can see push rod 2 processes as is reduced, therefore seal rubber plug 4 outside upper die-cut limits 10 are butted on outer sleeve 14 end faces, 1 tail end open side moves along concave slideway 11 to syringe to drive outer sleeve 14, thereby inner sleeve 15, form the gap between the outer sleeve 14 and consist of described limited impression 5, die-cut limit 10 and the second sealed muscle 9 fall into inner sleeve 15, in the gap between the outer sleeve 14, the second sealed muscle 9 upper surfaces are butted on inner sleeve 15 end faces, the lower surface on die-cut limit 10 is butted on outer sleeve 14 end faces, and outer sleeve 14 is after moving to concave slideway 11 ends, be butted on concave slideway 11 end wall, can't deviate from syringe 1, therefore, when seal rubber plug 4 fall into limited impression 5 interior after, just push rod 2 has been carried out stuck, the operation that can't push away again or draw
Claims (5)
1.
A kind of disposable syringe, comprise syringe, push rod and syringe needle, described push rod is arranged in the syringe, the push rod front end sleeve is provided with seal rubber plug, it is characterized in that: described syringe is provided with limited impression near tail end, and the rear cell wall of the corresponding nozzle side of this limited impression is higher than front cell wall 0.1 ㎜ of opposite side～0.35 ㎜; Described seal rubber plug outer edge surface is provided with the die-cut limit of at least one sealed muscle and bottom, described die-cut limit and described rear cell wall are interference fit, the magnitude of interference is 0.1 ㎜～0.3 ㎜, the width of described limited impression is more than or equal to the distance of described die-cut limit to described sealed muscle, and the shore hardness of described seal rubber plug is between 40 degree～100 degree.
2.
Disposable syringe according to claim 1, it is characterized in that: described syringe inwall is provided with concave slideway and cannelure, be provided with limited step between described concave slideway and the cannelure, slidely connect an outer sleeve in the described concave slideway, be provided with an inner sleeve in the described cannelure, gap between described outer sleeve and the described inner sleeve consists of described limited impression, the inner edge surface of described outer sleeve is a conical surface, and corresponding to the interior Zhou Jing of the described inner sleeve side interior Zhou Jing less than described inner sleeve, consist of described rear cell wall, described inner sleeve consists of described front cell wall with respect to the end face of outer sleeve side.
3.
Disposable syringe according to claim 2 is characterized in that: described inner sleeve is provided with guiding surface with respect to the other end inwall of outer sleeve, and this guiding surface is connected with described syringe inwall.
4.
Disposable syringe according to claim 1 and 2, it is characterized in that: described seal rubber plug outer edge surface top is provided with the first sealed muscle, the centre is the second sealed muscle, and the bottom is die-cut limit, and the width of described limited impression matches with the distance of described die-cut limit to described the first sealed muscle.
5.
Disposable syringe according to claim 4 is characterized in that: the shore hardness of described seal rubber plug is between 50 degree～70 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105095564A CN102989061A (en) | 2012-12-04 | 2012-12-04 | Disposable syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105095564A CN102989061A (en) | 2012-12-04 | 2012-12-04 | Disposable syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102989061A true CN102989061A (en) | 2013-03-27 |
Family
ID=47918485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105095564A Pending CN102989061A (en) | 2012-12-04 | 2012-12-04 | Disposable syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102989061A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103751885A (en) * | 2014-01-14 | 2014-04-30 | 苏州市雅思精密模具有限公司 | Disposable syringe |
| CN106730316A (en) * | 2016-12-28 | 2017-05-31 | 苏州科技城医院 | The transfusion many siphunculus of counterflow-preventing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1150980A (en) * | 1966-08-19 | 1969-05-07 | Sven Husted-Andersen | Disposable Syringe |
| US4790822A (en) * | 1987-12-11 | 1988-12-13 | Haining Michael L | Retractable hypodermic safety syringe |
| EP0409134B1 (en) * | 1989-07-17 | 1994-02-02 | Comercial Mariae, S.L. | A non-reusable syringe |
| WO2002032485A1 (en) * | 2000-10-19 | 2002-04-25 | Ali Kamagate | Secure syringe |
| CN2507476Y (en) * | 2001-11-20 | 2002-08-28 | 陆爱平 | Disposable syringe |
-
2012
- 2012-12-04 CN CN2012105095564A patent/CN102989061A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1150980A (en) * | 1966-08-19 | 1969-05-07 | Sven Husted-Andersen | Disposable Syringe |
| US4790822A (en) * | 1987-12-11 | 1988-12-13 | Haining Michael L | Retractable hypodermic safety syringe |
| EP0409134B1 (en) * | 1989-07-17 | 1994-02-02 | Comercial Mariae, S.L. | A non-reusable syringe |
| WO2002032485A1 (en) * | 2000-10-19 | 2002-04-25 | Ali Kamagate | Secure syringe |
| CN2507476Y (en) * | 2001-11-20 | 2002-08-28 | 陆爱平 | Disposable syringe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103751885A (en) * | 2014-01-14 | 2014-04-30 | 苏州市雅思精密模具有限公司 | Disposable syringe |
| CN106730316A (en) * | 2016-12-28 | 2017-05-31 | 苏州科技城医院 | The transfusion many siphunculus of counterflow-preventing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202105269U (en) | Inner needle base structure for safe self-destruction syringe | |
| CN202105275U (en) | Safe self-destruction syringe | |
| CN203043163U (en) | Disposable syringe | |
| CN102989061A (en) | Disposable syringe | |
| CN202761828U (en) | Novel low resistance injector | |
| CN105709310B (en) | Low-resistance syringe | |
| CN202982831U (en) | Disposable self-destruction syringe | |
| CN204840538U (en) | Injection with low resistance | |
| CN203694264U (en) | Safety syringe | |
| CN203196088U (en) | Vacuum retracting type safety injection syringe with multiple chambers | |
| CN100558421C (en) | The disposable syringe of a kind of safety self-destructing | |
| CN103721320A (en) | Safe injector | |
| CN205133608U (en) | Automatic pop out formula transfering loop | |
| CN201481919U (en) | Non-residual self-destruction type disposable syringe | |
| CN100479874C (en) | Disposable safety self-breaking injector | |
| CN204564732U (en) | Syringe needle retracting device and needle holder assembly and recovery tube assembly | |
| CN103656799A (en) | Prefilling injector | |
| CN203123206U (en) | Simple disposable anti-pollution sterile injection syringe | |
| CN203089146U (en) | Composite cap stopper for blood sampling tube and with improved structure | |
| CN202538079U (en) | Injector with thrust brake | |
| CN205494565U (en) | Low remaining syringe that dispenses of liquid medicine | |
| CN209827825U (en) | Safety self-destruction syringe | |
| CN211975865U (en) | High-performance waterproof silica gel plug device | |
| CN202426980U (en) | Outer end structure of syringe needle | |
| CN205041906U (en) | Auto -disable syringe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130327 |