CN203408310U - Inner needle seat structure for retractable safety auto-disable syringe - Google Patents
Inner needle seat structure for retractable safety auto-disable syringe Download PDFInfo
- Publication number
- CN203408310U CN203408310U CN201320532454.4U CN201320532454U CN203408310U CN 203408310 U CN203408310 U CN 203408310U CN 201320532454 U CN201320532454 U CN 201320532454U CN 203408310 U CN203408310 U CN 203408310U
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- Prior art keywords
- needle stand
- annular
- needle
- needle seat
- wall
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- Expired - Lifetime
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- 238000007789 sealing Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 4
- 208000027418 Wounds and injury Diseases 0.000 abstract 1
- 208000014674 injury Diseases 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 6
- 210000003205 muscle Anatomy 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 229960005486 vaccine Drugs 0.000 description 1
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Abstract
The utility model discloses an inner needle seat structure for a retractable safety auto-disable syringe. The inner needle seat structure comprises a needle seat body, wherein an opening is formed in the lower end of the needle seat body; an inner sleeve type retractable locking component is arranged in the needle seat body; a needle tube is arranged at the upper end of the needle seat body; an annular elastic sealed limiting part is formed on a part, which is close to the upper part, of an outer wall of the needle seat body; an annular buffer gap is formed in the inner side of the annular elastic sealed limiting part; a sealed clamping part is formed on an outer wall of the annular elastic sealed limiting part; an annular recessed part is formed on the outer wall of the annular elastic sealed limiting part on the lower part of the sealed clamping part; an annular clamping groove is formed in the upper part of the clamped locking part. When the inner needle seat is pulled back into a syringe barrel, the needle seat deflects to one side in a stress environment with asymmetric acting force at the end of a core rod, the entry needle swings to one side of an inner wall of the barrel in a direction of an angle about 45 degrees and is locked by the neck of the barrel. Therefore, the entry needle and the needle seat cannot be pushed out of the neck of the barrel, the needle is effectively prevented from being pushed out so as not to cause secondary injury, and safety auto-disable operation of the syringe is really realized.
Description
Technical field
This utility model relates to the technical field of medical apparatus and instruments, specifically a kind of interior needle stand structure for haulback type safety self-destructing syringe, particularly its mechanical connecting structure.
Background technology
Documents one, the patent No.: ZL200710047077.4, the applying date: 2007.10.16, notification number: CN101411908, patentee: Shanghai DingJianTang biochemistry Science Co., Ltd, this case discloses " a kind of safe self-destruction type vaccine injector ", comprise cylindrical shell, in cylindrical shell, be provided with core bar, core bar is provided with plug near end, in the cylinder neck of cylindrical shell, be provided with syringe needle, syringe needle place is provided with needle tubing, it is characterized in that: the body of rod sidewall of described core bar end is provided with horizontal cut, longitudinal breach at horizontal cut and body of rod place, core bar end is connected, horizontal cut matches with longitudinal breach, syringe needle is socketed to form by upper needle stand and lower needle stand, lower needle stand inner chamber hollow, lower needle stand becomes tubular structure, lower needle stand is provided with lower needle holder convex tendon with respect to the other end opening part inwall of installing needle holder, core bar end is provided with the elastomer being formed with longitudinal breach UNICOM by horizontal cut, the core bar body of rod herein has certain elasticity, wherein longitudinally breach is up-narrow and down-wide shape, and horizontal cut outside opening place upper core club shaft outer wall protrudes from lower core club shaft outer wall herein, horizontal cut can be high outside and low outside shape, it is circular-arc that core bar end becomes, upper needle stand becomes bar shape, upper needle stand outer wall epimere is provided with reinforcement fin, upper needle stand outer wall hypomere is provided with fixedly bulge loop of needle stand, the upper needle stand fixedly overall diameter of bulge loop is greater than needle stand outer diameter 0.05mm-0.3mm, described lower needle stand becomes bar shape, its inner chamber hollow, lower needle stand cavity inner wall place is provided with lower needle holder annular fixed groove, lower needle holder annular fixed groove can with upper needle stand fixedly bulge loop match, the internal diameter of lower needle holder annular fixed groove upper chamber is less than the fixedly external wall external diameter of bulge loop upper bar 0.1mm-0.35mm of needle stand, internal diameter≤upper the needle stand of lower needle holder annular fixed groove lower cavity is the external wall external diameter of bulge loop lower pole fixedly, lower needle stand is provided with lower needle holder annular convex rib with respect to the other end outer wall end of lower needle holder bulge loop, the cylinder neck inwall place of described cylindrical shell is respectively equipped with a neck upper limit ring and cylinder neck lower limit ring, distance between cylinder neck upper limit ring and cylinder neck lower limit ring is 0.3mm-1.5mm, cylinder neck upper limit ring protrudes from inwall 0.1mm-0.6mm between a neck upper limit ring and cylinder neck lower limit ring, cylinder neck lower limit ring protrudes from inwall 0.02mm-0.25mm between a neck upper limit ring and cylinder neck lower limit ring, the internal diameter of cylinder lumen between internal diameter >=cylinder neck upper limit ring of cylinder neck upper limit ring top cylinder lumen and cylinder neck lower limit ring, the internal diameter of internal diameter≤cylinder neck lower limit ring bottom cylinder lumen of cylinder lumen between cylinder neck upper limit ring and cylinder neck lower limit ring, between cylinder neck upper limit ring and cylinder neck lower limit ring, the internal diameter of cylinder lumen is less than lower needle holder annular convex rib external diameter 0.1mm-0.5mm, cylinder lumen is provided with cylindrical shell limit rib with respect to the other end inwall place of cylinder neck, cylindrical shell limit rib can be linear annular muscle, many the annular muscle that perpendicular muscle forms, , a perpendicular muscle, the annular muscle that a plurality of raised points form, the cylinder inboard wall place of cylindrical shell limit rib bottom is provided with cylindrical shell inner convex rib, the thickness of the distance >=annular stop sheet between cylindrical shell limit rib and cylindrical shell inner convex rib, the internal diameter at cylindrical shell limit rib place is less than the diameter of annular stop sheet.
In existing safety injector structure, there is the function of utilizing barbed body to realize needle retractable, realize safety injection.General barbed body is metalwork or working of plastics.Metalwork need to be processed and coordinates with core bar or assemble, complex manufacturing technology, difficulty is large and stability is not good, has not only increased manufacturing procedure and manufacturing cost, and metalwork itself and assembling process thereof can increase the uncertainties such as hidden danger of product aspect safety and product quality.Structurally still there is defect or have incomplete place in existing plastics barb member, therefore causes product in use to have potential safety hazard or security breaches.The design of existing plastics back-off part, though can realize the syringe needle function of pulling back, in use, syringe needle is still in normal trace after being pulled back, syringe needle is likely again released and is caused user by the risk of secondary damage.
In addition, all there is a same difficult problem in existing single needle seat pumpback formula safety self-destructing syringe or safety injector, is exactly how to solve to engage between interior needle stand and cylindrical shell stablize and reach certain intensity to meet stability requirement; Meanwhile, when pumpback needle stand, required pulling force can not be too greatly to facilitate use.Although rigid fit structure can reach interior needle stand and the stable locking effect of cylinder inboard wall, be difficult to or even cannot reach the convenient demand of using simultaneously.The unstability that plastic material itself exists and the characteristic that is subject to variation of ambient temperature can cause the product stability extreme difference of hard fit structure, and in production process, quality and precision are all difficult to control, and almost cannot realize batch production.
In sum, still need the latch-up structure between the core bar structure of existing pulling type syringe and interior needle stand and cylindrical shell to further improve, further to improve product safety and stability in use, reach simplification manufacturing procedure simultaneously, reduce the object of manufacturing cost.
Summary of the invention
The purpose of this utility model is to provide a kind of interior needle stand structure for haulback type safety self-destructing syringe.Between this interior needle stand and injector cartridge, by elastic buffering mechanism, mutually lock, utilize the distortion of buffer gap to produce expansionary force, realize both lockings and depart from effect, this elastic buffering mechanism can be arranged at interior needle stand place, also can be arranged at cylinder inboard wall place, simultaneously, interior needle stand and cylindrical shell place all form the elastic buffer snap fastener that can cooperatively interact, its core bar end is provided with the asymmetric locking piece with spring function, this locking piece can lock by engaging mode mutually with syringe needle inner chamber, and, when needle stand is pulled back to after in injector cartridge, under the strength effect of Asymmetric Elasticity structure, needle stand can stressed taking advantage of a situation turn to a lateral deviation, therefore entry needle can swing to cylinder inboard wall one side with nearly 45 angular direction, and locked by cylindrical shell cervical region, cause thus entry needle and needle stand again to be released cylindrical shell cervical region, effectively prevent that syringe needle from being released the secondary damage cause again, realize the safety self-destruct operation of syringe, overcome the shortcoming and defect existing in prior art.
To achieve these goals, the first technical scheme of the present utility model is: a kind of interior needle stand structure for haulback type safety self-destructing syringe, it comprises needle stand body, it is characterized in that: described needle stand body bottom forms opening, in needle stand body, be provided with the inner cased type locked component of pulling back, needle stand body upper end is provided with needle tubing, needle stand body outer wall forms annular resilient seal limiting section near place, top, annular resilient seal limiting section inner side forms loop buffer gap, annular resilient seal limiting section outer wall place forms sealing holding section, the annular resilient seal limiting section outer wall place of sealing engaging subordinate portion forms annular recess portion, the inner cased type locked component of pulling back is provided with the snap-in lock bonding part of annular projection near the inwall place of lower ending opening, annular engaging groove is formed at this top, snap-in lock bonding part, needle stand body forms ring-shaped step between upper and lower, above-mentioned needle tubing is arranged at needle stand body top.
The utility model discloses a kind of interior needle stand structure for haulback type safety self-destructing syringe, the end of the syringe core rod being mated is provided with the asymmetric locking piece of pulling back with spring function, this unsymmetric structure coordinates spring function design to guarantee that this locking piece can insert interior needle stand cavity smoothly, and utilize the effect of elastic dilatation power, realizing asymmetric holding section, both sides and the inner cased type of the needle stand inner chamber locked component holding section of pulling back engages and locks, because the pull back snap-in lock bonding part of locked component card inner chamber of inner cased type also has elastic buffer characteristic, therefore with the asymmetric locking piece of pulling back when advanced state is touched, both meetings produce buffering distortion relatively, be convenient to locking piece and snap in the inner cased type locked component inner chamber of pulling back, and when locking piece pumpback and the inner cased type locked component of pulling back mutually lock, when needle stand is pulled back to after in injector cartridge, under the force environment of asymmetric active force, needle stand can form deflection to a side, therefore entry needle can swing to cylinder inboard wall one side with nearly 45 angular direction, and locked by cylindrical shell cervical region, cause thus entry needle and needle stand again to be released cylindrical shell cervical region, effectively prevent that syringe needle from again being released and causing secondary damage, really realize the safety self-destruct operation of syringe.Product reasonable integral structure, is skillfully constructed, and is easy to apply, and compares existing product design and technology, has significant technical breakthrough in design, and has outstanding safety and practicality feature.
Accompanying drawing explanation
Fig. 1 is this utility model needle stand body construction schematic diagram.
Fig. 2 is this utility model inner cased type locked component structural representation of pulling back.
Fig. 3 is this utility model using state figure.
The specific embodiment
With reference to the accompanying drawings, this utility model is further described.
This utility model is a kind of interior needle stand structure for haulback type safety self-destructing syringe, it comprises needle stand body 1, it is different from prior art and is: described needle stand body 1 bottom forms opening 2, in needle stand body 1, be provided with the inner cased type locked component 3 of pulling back, needle stand body 1 upper end is provided with needle tubing 4, needle stand body 1 outer wall forms annular resilient seal limiting section 5 near place, top, annular resilient seal limiting section 5 inner sides form loop buffer gap 6, annular resilient seal limiting section 5 outer wall places form sealing holding section 7, the annular resilient seal limiting section 5 outer wall places of sealing 7 bottoms, holding section form annular recess portion 8, the inner cased type locked component 3 of pulling back is provided with the snap-in lock bonding part 9 of annular projection near the inwall place of lower ending opening, annular engaging groove 10 is formed at these 9 tops, snap-in lock bonding part, needle stand body forms ring-shaped step 14 between 1 upper and lower, above-mentioned needle tubing 4 is arranged at needle stand body 1 top.
In the specific implementation, described needle stand body 1 inner chamber place is provided with annular stop groove 11, and the inner cased type locked component 3 outer wall places that pull back form the annular stop flange 12 match with annular stop groove 11.
In the specific implementation, fillet surface 13 in annular is formed at 9 bottoms, described snap-in lock bonding part.
In the specific implementation, the narrow shape of width is presented in the cross section of described annular engaging groove 10.
In the specific implementation, the degree of depth in described loop buffer gap 6 is 0.01mm-35mm, and the width in loop buffer gap 6 is 0.01mm-35mm, and the wall thickness of the annular resilient seal limiting section 5 in 6 outsides, described loop buffer gap is 0.01mm-35mm.
In the specific implementation, the upper end of described annular resilient seal limiting section 5 flushes with ring-shaped step 14 or lower than ring-shaped step 14.
In the specific implementation, described needle stand body 1 and inner cased type are pulled back between locked component 3 as split type assembly structure or integrated formed structure.
In the specific implementation, needle stand body 1 is integral molding structure or split type assembly structure with annular resilient seal limiting section 5.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that the concrete enforcement of this utility model is confined to above-mentioned these explanations.For this utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (8)
1. the interior needle stand structure for haulback type safety self-destructing syringe, it comprises needle stand body (1), it is characterized in that: described needle stand body (1) bottom forms opening (2), in needle stand body (1), be provided with the inner cased type locked component (3) of pulling back, needle stand body (1) upper end is provided with needle tubing (4), needle stand body (1) outer wall forms annular resilient seal limiting section (5) near place, top, annular resilient seal limiting section (5) inner side forms loop buffer gap (6), annular resilient seal limiting section (5) outer wall place forms sealing holding section (7), annular resilient seal limiting section (5) the outer wall place of sealing bottom, holding section (7) forms annular recess portion (8), the inner cased type locked component (3) of pulling back is provided with the snap-in lock bonding part (9) of annular projection near the inwall place of lower ending opening, annular engaging groove (10) is formed at this top, snap-in lock bonding part (9), needle stand body (1) forms ring-shaped step (14) between upper and lower, above-mentioned needle tubing (4) is arranged at needle stand body (1) top.
2. a kind of interior needle stand structure for haulback type safety self-destructing syringe according to claim 1, it is characterized in that: described needle stand body (1) inner chamber place is provided with annular stop groove (11), inner cased type locked component (3) the outer wall place that pulls back forms the annular stop flange (12) match with annular stop groove (11).
3. a kind of interior needle stand structure for haulback type safety self-destructing syringe according to claim 1, is characterized in that: fillet surface (13) in annular is formed at bottom, described snap-in lock bonding part (9).
4. a kind of interior needle stand structure for haulback type safety self-destructing syringe according to claim 1, is characterized in that: the narrow shape of width is presented in the cross section of described annular engaging groove (10).
5. a kind of interior needle stand structure for haulback type safety self-destructing syringe according to claim 1, it is characterized in that: the degree of depth in described loop buffer gap (6) is 0.01mm-35mm, the width in loop buffer gap (6) is 0.01mm-35mm, and the wall thickness of the annular resilient seal limiting section (5) in outside, described loop buffer gap (6) is 0.01mm-35mm.
6. a kind of interior needle stand structure for haulback type safety self-destructing syringe according to claim 1, is characterized in that: the upper end of described annular resilient seal limiting section (5) flushes with ring-shaped step (14) or lower than ring-shaped step (14).
7. a kind of interior needle stand structure for haulback type safety self-destructing syringe according to claim 1, is characterized in that: it is split type assembly structure or integrated formed structure that described needle stand body (1) and inner cased type are pulled back between locked component (3).
8. a kind of interior needle stand structure for haulback type safety self-destructing syringe according to claim 1, is characterized in that: described needle stand body (1) is integral molding structure or split type assembly structure with annular resilient seal limiting section (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320532454.4U CN203408310U (en) | 2013-08-29 | 2013-08-29 | Inner needle seat structure for retractable safety auto-disable syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320532454.4U CN203408310U (en) | 2013-08-29 | 2013-08-29 | Inner needle seat structure for retractable safety auto-disable syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203408310U true CN203408310U (en) | 2014-01-29 |
Family
ID=49971238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320532454.4U Expired - Lifetime CN203408310U (en) | 2013-08-29 | 2013-08-29 | Inner needle seat structure for retractable safety auto-disable syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203408310U (en) |
-
2013
- 2013-08-29 CN CN201320532454.4U patent/CN203408310U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220425 Address after: 401346 1-1 and 1-2, building 1, No. 16, Shigui Avenue, Jieshi Town, Banan District, Chongqing Patentee after: Chongqing pharmaceutical group Weixun Medical Technology Co.,Ltd. Address before: 200336 Room 301, No. 25, Lane 99, huangjincheng Road, Changning District, Shanghai Patentee before: Wang Zuyang |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140129 |