CN202569091U - Sleeve-type pullback locking assembly for pullback safety self-destruction syringe - Google Patents
Sleeve-type pullback locking assembly for pullback safety self-destruction syringe Download PDFInfo
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- CN202569091U CN202569091U CN 201220071156 CN201220071156U CN202569091U CN 202569091 U CN202569091 U CN 202569091U CN 201220071156 CN201220071156 CN 201220071156 CN 201220071156 U CN201220071156 U CN 201220071156U CN 202569091 U CN202569091 U CN 202569091U
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Abstract
The utility model discloses a sleeve-type pullback locking assembly for a pullback safety self-destruction syringe. The sleeve-type pullback locking assembly comprises a sleeve-type pullback locking assembly body and is characterized in that a fixed clamping part is arranged on the outer wall or the inner wall of the sleeve-type pullback locking assembly body, and an annular clamping locking part is formed close to the lower end in the inner cavity of the sleeve-type pullback locking assembly body. The assembly is matched with a needle file in the syringe and locked with the needle file through the fixed clamping structure. The annular clamping locking part is arranged in the assembly, has a certain buffering elasticity and can be matched with an elastic locking pullback piece at the end of a core rod, so that a clamping blocking effect of the clamping locking part and the pullback piece is achieved; and the sleeve-type pullback locking assembly is a transition fitting for locking the elastic locking pullback piece at the end of the core rod and the needle file in the syringe.
Description
Technical field
This utility model relates to technical field of medical, a kind of specifically shell type that is used for the haulback type safe self-breaking syringe pull back locked component, particularly its mechanical connecting structure.
Background technology
Documents one, the patent No.: ZL200710047077.4, the applying date: 2007.10.16; Notification number: CN101411908, the patentee: Shanghai DingJianTang biochemistry Science Co., Ltd, this case discloses " a kind of safe self-destruction type vaccine injector "; Comprise cylindrical shell, be provided with core bar in the cylindrical shell, core bar is provided with plug near the place, end; Be provided with syringe needle in the tube neck of cylindrical shell, the syringe needle place is provided with needle tubing, it is characterized in that: the body of rod sidewall of said core bar end is provided with horizontal cut; Vertical breach at horizontal cut and body of rod place, core bar end links, and horizontal cut matches with vertical breach, and syringe needle is socketed to form by last needle stand and following needle stand; Following needle stand inner chamber hollow, following needle stand becomes tubular structure, and following needle stand is provided with down the needle holder convex tendon with respect to the other end opening part inwall of installing needle holder; The core bar end is provided with the elastomer that is formed with vertical breach UNICOM by horizontal cut, and the core bar body of rod here has certain elasticity, and wherein vertically 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 here, and horizontal cut can be high outside and low outside shape, and it is circular-arc that the core bar end becomes; Last needle stand becomes bar shape, and last needle stand outer wall epimere is provided with the reinforcement fin, and last needle stand outer wall hypomere is provided with fixedly bulge loop of needle stand; Fixedly the overall diameter of bulge loop is greater than last needle stand outer diameter 0.05mm-0.3mm for last needle stand, and said needle stand down becomes bar shape, its inner chamber hollow; Following needle stand cavity inner wall place is provided with down needle holder annular fixed groove, following needle holder annular fixed groove can with last needle stand fixedly bulge loop match, the internal diameter of the annular fixed groove upper chamber of following needle holder is less than the fixing external wall external diameter of the bulge loop upper bar 0.1mm-0.35mm of last needle stand; Internal diameter≤last the needle stand of following needle holder annular fixed groove lower cavity is the external wall external diameter of bulge loop lower pole fixedly; Following needle stand is provided with down the needle holder annular convex rib with respect to the place, other end outer wall end of following needle holder bulge loop, and the tube neck inwall place of said cylindrical shell is provided with a neck upper limit ring and a tube neck lower limit ring respectively, and the distance between a neck upper limit ring and the tube neck lower limit ring is 0.3mm-1.5mm; Tube neck upper limit ring protrudes from inwall 0.1mm-0.6mm between a neck upper limit ring and the tube neck lower limit ring; Tube neck lower limit ring protrudes from inwall 0.02mm-0.25mm between a neck upper limit ring and the tube neck lower limit ring, the internal diameter of cylinder lumen between the internal diameter>=tube neck upper limit ring of tube neck upper limit ring top cylinder lumen and the tube neck lower limit ring, the internal diameter of the internal diameter≤tube neck lower limit ring bottom cylinder lumen of cylinder lumen between tube neck upper limit ring and the tube neck lower limit ring; The internal diameter of cylinder lumen is less than following needle holder annular convex rib external diameter 0.1mm-0.5mm between tube neck upper limit ring and the tube neck lower limit ring; Cylinder lumen is provided with the spacing muscle of cylindrical shell with respect to the other end inwall place of tube neck, and the spacing muscle of cylindrical shell can be linear annular muscle, many annular muscle, annular muscle that perpendicular muscle, a plurality of raised points constitute that perpendicular muscle constitutes, and the cylinder inboard wall place of the spacing muscle of cylindrical shell bottom is provided with the cylindrical shell inner convex rib; The thickness of the distance between spacing muscle of cylindrical shell and the cylindrical shell inner convex rib>=annular stop sheet, the internal diameter at the spacing muscle of cylindrical shell place is less than the diameter of annular stop sheet.
The function of utilizing barbed body to realize needle retractable is arranged in the existing safety injector structure, realize safety injection, general barbed body is metalwork or working of plastics.Metalwork need be processed and cooperate with core bar or assemble; Complex manufacturing technology; Difficulty is big 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.Existing plastics barb member structurally still exists defective or incomplete place and therefore causes product in use to have potential safety hazard or security breaches.The design of existing plastics back-off spare though can realize the syringe needle function of pulling back, in use, still is in normal trace after syringe needle is pulled back, and syringe needle might be caused user by the risk of secondary damage by release once more.
In addition, all there are a same difficult problem in existing single needle seat pumpback formula safety self-destructing syringe or safety injector, are exactly engage between needle stand and the cylindrical shell in how solving to stablize and reach certain intensity to meet stability requirement; Simultaneously, required pulling force can not use with convenient too greatly when the pumpback needle stand.Though rigid fit structure can reach the stable locking effect of interior needle stand and cylinder inboard wall, be difficult to or even can't reach simultaneously the demand of convenient use.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 quality and precision all are difficult to control in the production process, almost can't realize batch process.
In sum; Still need further improve the core bar structure of existing haulback type syringe and the latch-up structure between interior needle stand and the cylindrical shell; Further to improve product safety and stability in use, reach the simplification manufacturing procedure simultaneously, reduce the purpose of manufacturing cost.
Summary of the invention
The purpose of this utility model is to provide a kind of shell type that is used for haulback type safe self-breaking syringe locked component of pulling back.Its with syringe in needle stand match, be assemblied in the syringe needle stand inner chamber or be socketed on its outer wall, and with syringe in needle stand lock through engaging mode.The pull back inner chamber of locked component of shell type forms the elasticity holding section, can match with the elastic locking of the piston boom end part of pulling back, and realizes the mutual locking of needle section and core bar.Both bite all have spring function, and the resilient engagement structure is convenient to the elastic locking insertion shell type of the part locked component inner chamber of pulling back of pulling back.Lock each other through elastic buffering mechanism between needle stand and the injector cartridge in the syringe, utilize the distortion of buffer gap to produce expansionary force, realize both lockings and break away from effect.This elastic buffering mechanism can be arranged at interior needle stand place, also can be arranged at the cylinder inboard wall place, and simultaneously, interior needle stand and cylindrical shell place all form the elastic buffer snap fastener that can cooperatively interact.The core bar end is provided with the asymmetric locking piece of band spring function, and this locking piece can lock through engaging mode with the syringe needle inner chamber each other.After needle stand was pulled back to the injector cartridge, under the strength effect of asymmetric elastic construction, needle stand can stressed taking advantage of a situation change to a lateral deviation; Therefore entry needle can swing to cylinder inboard wall one side with nearly 45 angular direction; And locked by the cylindrical shell cervical region; Cause entry needle and needle stand to be released the cylindrical shell cervical region once more thus; Prevent that effectively syringe needle from being released the secondary damage cause once more, realize the safety self-destruct operation of syringe, overcome the shortcoming and defect that exists in the prior art.
To achieve these goals; The technical scheme of this utility model is: a kind of shell type that is used for haulback type safe self-breaking syringe locked component of pulling back; It comprises the shell type locked component body of pulling back; It is characterized in that: the pull back outer wall or the inwall place of locked component body of said shell type is provided with fixedly holding section, and the shell type locked component chamber body of pulling back forms ring-type snap-in lock bonding part near lower end.
The utility model discloses a kind of shell type that is used for haulback type safe self-breaking syringe locked component of pulling back.Needle stand matches in this assembly and the syringe, and both lock through fixing snap-in structure each other.The inside of this assembly is provided with ring-type snap-in lock bonding part; This ring-type snap-in lock bonding part possesses certain cushion characteristic; Can match with the elastic locking of the core bar end part of pulling back; Realize both snap lock effects, this shell type is pulled back, and locked component is real to be the core bar end elastic locking transition accessory that part and the interior needle stand of syringe lock each other of pulling back.The end of described syringe core rod is provided with the asymmetric locking piece of pulling back of band spring function; Unsymmetric structure cooperates the spring function design can guarantee that this locking piece can insert the needle stand inner chamber smoothly, and utilizes the function of its elastic dilatation, realizes that the asymmetric holding section, both sides and the shell type of the needle stand inner chamber locked component holding section of pulling back engages and locks.The annular groove of locked component card inner chamber also has the elastic buffer characteristic because shell type is pulled back; So and the asymmetric locking piece of pulling back is when advanced state is touched; Both meetings produce the buffering distortion relatively; Be convenient to locking piece and snap in the shell type locked component inner chamber of pulling back, and when the locking piece pumpback and the shell type locked component of pulling back lock each other.After needle stand is pulled back to the injector cartridge; Receiving under the force environment of asymmetric active force, needle stand can form deflection to a side, and therefore entry needle can swing to cylinder inboard wall one side with nearly 45 angular direction; And locked by the cylindrical shell cervical region; Cause entry needle and needle stand to be released the cylindrical shell cervical region once more thus, prevent effectively that syringe needle from being released once more to cause secondary damage, really realize the safety self-destruct operation of syringe.When this utility model practical implementation, the described asymmetric elasticity locking piece of pulling back is a plastics barbed body.This plastics barbed body adopts the design principle of asymmetry and the ingenious cooperation of elastomer structure, uses specific angle and size design, makes the barb body possess the elastic buffer lock function.Pull back locking piece and core bar of above-mentioned asymmetric elasticity is into a single integrated structure, and global facility adopts a die sinking molding, need not processing or follow-up assembling separately, effectively reduces manufacturing cost, has simplified assembly technology, has reduced assembly process.Product uses simple to operate, stable working state.The pull back snap lock effect of part and needle stand inner chamber of the asymmetric elasticity of core bar end is splendid; The product reasonable integral structure; Be skillfully constructed, be easy to apply, compare existing product design and technology; Have significant technical breakthrough in the design, and have outstanding safety and practicality characteristics.
Description of drawings
Fig. 1 is this utility model first example structure sketch map.
Fig. 2 is this utility model second example structure sketch map.
Fig. 3 is this utility model first embodiment and interior needle stand assembly structure sketch map.
Fig. 4 is this utility model second embodiment and needle stand assembly structure sketch map.
Fig. 5 is this utility model first embodiment user mode figure.
Fig. 6 is this utility model second embodiment user mode figure.
The specific embodiment
With reference to the accompanying drawings, this utility model is further described.
This utility model is a kind of shell type that is used for haulback type safe self-breaking syringe locked component of pulling back; It comprises the shell type locked component body 1 of pulling back; It is different from prior art and is: the pull back outer wall or the inwall place of locked component body 1 of said shell type is provided with fixedly holding section 2, and the shell type locked component chamber body of pulling back forms ring-type snap-in lock bonding part 3 near lower end.
In the specific implementation, annular groove 4 is formed at the top of said ring-type snap-in lock bonding part 3, and the thickness of annular groove 4 medial walls 5 is 0.01mm-3mm, and annular groove 4 medial walls and annular groove 4 lateral walls 6 form 2 degree to 90 degree angles.Above-mentioned technical parameter has guaranteed that the ring body of medial wall 5 formation possesses the elastic buffer structure of contractility; When touching with the asymmetric locking piece of pulling back of piston boom end; Relative strain all can take place in both; Be convenient to the asymmetric locking piece of pulling back and insert in locked component body 1 cavity of pulling back, in core bar was pulled back process, the side of the above-mentioned asymmetric locking piece of pulling back can snap in the annular groove 4; Realize the pull back mutual locking of locked component body and core bar of shell type, core bar also just locks needle stand in the syringe thus.
In the specific implementation, the interior diameter of said annular groove 4 medial wall upper ends formation is 1mm-80mm.
In the specific implementation, the width of rebate of said annular groove 4 is greater than the bottom land width.
In the specific implementation, the pull back outer wall place of locked component body 1 of said shell type forms annular stop step 7, and needle stand inner chamber annular reverse step cooperates the realization limit function in this annular stop step 7 and the syringe.
Above content is the further explain that combines concrete preferred implementation that this utility model is done, and can not assert that this utility model practical implementation is confined to above-mentioned these explanations.For the those of ordinary skill of technical field under this utility model, under the prerequisite that does not break away from this utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the protection domain of this utility model.
Claims (5)
1. a shell type that is used for haulback type safe self-breaking syringe locked component of pulling back; It comprises the shell type locked component body (1) of pulling back; It is characterized in that: the pull back outer wall or the inwall place of locked component body (1) of said shell type is provided with fixedly holding section (2), and the shell type locked component chamber body of pulling back forms ring-type snap-in lock bonding part (3) near lower end.
2. a kind of shell type that is used for the haulback type safe self-breaking syringe according to claim 1 locked component of pulling back; It is characterized in that: annular groove (4) is formed at the top of said ring-type snap-in lock bonding part (3); The thickness of annular groove (4) medial wall (5) is 0.01mm-3mm, and annular groove (4) medial wall and annular groove (4) lateral wall (6) form 2 degree to 90 degree angles.
3. a kind of shell type that is used for the haulback type safe self-breaking syringe according to claim 1 locked component of pulling back is characterized in that: the interior diameter that said annular groove (4) medial wall upper end forms is 1mm-80mm.
4. a kind of shell type that is used for the haulback type safe self-breaking syringe according to claim 1 locked component of pulling back, it is characterized in that: the width of rebate of said annular groove (4) is greater than the bottom land width.
5. a kind of shell type that is used for the haulback type safe self-breaking syringe according to claim 1 locked component of pulling back is characterized in that: the pull back outer wall place of locked component body (1) of said shell type forms annular stop step (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220071156 CN202569091U (en) | 2012-02-29 | 2012-02-29 | Sleeve-type pullback locking assembly for pullback safety self-destruction syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220071156 CN202569091U (en) | 2012-02-29 | 2012-02-29 | Sleeve-type pullback locking assembly for pullback safety self-destruction syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202569091U true CN202569091U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220071156 Expired - Fee Related CN202569091U (en) | 2012-02-29 | 2012-02-29 | Sleeve-type pullback locking assembly for pullback safety self-destruction syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202569091U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013127261A1 (en) * | 2012-02-29 | 2013-09-06 | Wang Zuyang | Needle base structure for use in safe self-destructing syringe |
| WO2014056290A1 (en) * | 2012-10-11 | 2014-04-17 | Wang Zuyang | Safe self-destructing injector with pull-back type needle |
| WO2015070523A1 (en) * | 2013-10-18 | 2015-05-21 | 王祖扬 | Pulled-back fixed-needle safe self-destroying syringe |
| WO2015070525A1 (en) * | 2013-10-18 | 2015-05-21 | 王祖扬 | Needle base structure for pulled-back fixed-needle safe self-destroying syringe |
| CN112999468A (en) * | 2021-02-09 | 2021-06-22 | 上海康德莱医疗器械股份有限公司 | Safety syringe |
-
2012
- 2012-02-29 CN CN 201220071156 patent/CN202569091U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013127261A1 (en) * | 2012-02-29 | 2013-09-06 | Wang Zuyang | Needle base structure for use in safe self-destructing syringe |
| WO2014056290A1 (en) * | 2012-10-11 | 2014-04-17 | Wang Zuyang | Safe self-destructing injector with pull-back type needle |
| WO2015070523A1 (en) * | 2013-10-18 | 2015-05-21 | 王祖扬 | Pulled-back fixed-needle safe self-destroying syringe |
| WO2015070525A1 (en) * | 2013-10-18 | 2015-05-21 | 王祖扬 | Needle base structure for pulled-back fixed-needle safe self-destroying syringe |
| CN112999468A (en) * | 2021-02-09 | 2021-06-22 | 上海康德莱医疗器械股份有限公司 | Safety syringe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20150229 |
|
| EXPY | Termination of patent right or utility model |