CN102949767A - Syringe and core rod locking structure of safety injector with telescopic tip - Google Patents
Syringe and core rod locking structure of safety injector with telescopic tip Download PDFInfo
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- CN102949767A CN102949767A CN2011102399135A CN201110239913A CN102949767A CN 102949767 A CN102949767 A CN 102949767A CN 2011102399135 A CN2011102399135 A CN 2011102399135A CN 201110239913 A CN201110239913 A CN 201110239913A CN 102949767 A CN102949767 A CN 102949767A
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- syringe
- core bar
- bulge loop
- flange
- lower flange
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- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
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Abstract
The invention discloses a syringe and core rod locking structure of a safety injector with a telescopic tip. The syringe and core rod locking structure comprises a syringe and a core rod. An upper bulge loop and a lower bulge loop are arranged at the tail of an inner hole of the syringe, and a fastening slot is formed between the upper bulge loop and the lower bulge loop. An upper flange and a lower flange which are adjacently oppositely arranged are arranged on the core rod body, the diameter of each of the upper flange and the lower flange is larger than the inner diameter of each of the upper bulge loop and the lower bulge loop while being matched with the hole diameter of the inner hole of the syringe, the upper flange faces towards the head of the core rod, and the lower flange faces towards the tail of the core rod. The upper flange and the lower flange pulled to the tail of the inner hole of the syringe from the core rod can be deformed to overpass the upper bulge loop on the syringe to be locked into the fastening slot.
Description
Technical field
The present invention relates to the retractable safety injector of a kind of needle point, but particularly a kind of syringe of needle point retrieving safety injector and core bar latching structure.
Background technology
In the middle of disposible safety syringe, a kind of safe self-breaking syringe is wherein arranged, the retraction of its needle point is realized by manpower manual post-tensioning core bar, at this, for realizing effective self-destruction of syringe, avoiding overexerting core bar pulled out from syringe causes syringe needle to expose, and also for avoiding after the self-destruction core bar to push back the needle pierces syringe is exposed simultaneously, generally all is provided with latching structure between syringe endoporus afterbody and core bar.
At present, existing latching structure generally comprises an engaging bulge loop, two snap flange on the core bar and the collar of auxiliary assembling usefulness of syringe endoporus afterbody.Wherein said engaging bulge loop both sides are right-angle structure, and described two snap flange in opposite directions interval arrange, and interval slot that formation is set can engage the bulge loop engaging with described between the two.
Above structure setting, although can realize well that the screens behind the core bar retraction is locked, but because being subject to structural design defect, so that in the assembling process of core bar and syringe, the engaging bulge loop that two snap flange on the core bar can't directly be crossed on the syringe directly assembles, must just can finish by means of a collar, the outside that can split be movably arranged on two snap flange on the core bar at this collar, also can be arranged on the outside of engaging protrusion on the syringe, but no matter the sort of set-up mode all will increase an accessory to syringe, and this not only causes the increase of manufacturing cost on the one hand, simultaneously also can so that assemble complicatedly, greatly reduce the efficiency of assembling of core bar and syringe.
Summary of the invention
For the problems referred to above, but the invention provides a kind of syringe and core bar latching structure of needle point retrieving safety injector, it is when guaranteeing the latching structure locking effect, removed the collar of assembling usefulness, reduced accessory, simplify installation step, can promote to a certain extent the efficiency of assembling of core bar and syringe.
For achieving the above object, the present invention is by the following technical solutions:
But a kind of syringe of needle point retrieving safety injector and core bar latching structure comprise syringe and core bar, it is characterized in that: described syringe endoporus is provided with up and down two bulge loops at afterbody, forms a slot between the upper lower convex ring; Be provided with up and down two flanges that external diameter matches with syringe endoporus aperture greater than lower convex ring internal diameter on the syringe on the described core bar body, two flanges are adjacent and arrange dorsad up and down, and upper flange is towards the core bar head, and lower flange is towards the core bar afterbody; The deformable when the core bar post-tensioning arrives syringe endoporus afterbody of two flanges is crossed bulge loop on the described syringe and to snap in described slot locked up and down.
Further, the upper side of above-mentioned upper bulge loop is the inclined-plane of a from top to bottom oblique interior setting, and the downside of upper bulge loop arranges with the syringe inner hole wall is vertical.
Further, the upper side of above-mentioned lower convex ring arranges with the syringe inner hole wall is vertical, the inclined-plane of oblique outer setting down on the downside of lower convex ring is served as reasons.
Further, above-mentioned core bar upper flange is that a sheet type falls beveled structure.
Further, above-mentioned core bar lower flange is that a sheet type falls beveled structure.
Further, above-mentioned core bar lower flange is some elasticity support claw structures that arrange around core bar.
Further, above-mentioned lower flange bottom is towards being arranged with some screens projections, and the relative core bar of each screens projection is around the aperture of the position diameter that arranges less than two bulge loops about the syringe.
Further, on the above-mentioned core bar near on the downside of lower flange be provided with easy fracture.
Latching structure of the present invention only comprises up and down two bulge loops on the syringe and up and down two flanges on the core bar, has not had to cooperate the thimble structure of assembling usefulness, has reduced accessory, has reduced production cost.
When assembling, at first utilize the ramp structure of syringe lower convex ring downside, upper lower flange on the core bar is out of shape gradually inside contract and gos deep into the lower convex ring endoporus, then promote fast core bar, utilize the inertia of core bar, make also lower flange on the core bar that does not recover fully, successfully cross slot and upper bulge loop endoporus and enter syringe endoporus front portion and finish assembling, whole assembling process fast makes things convenient for, and can promote exponentially efficiency of assembling.
And in the self-destruction process, when the core bar post-tensioning, lower flange at first is out of shape under the ramp structure effect of bulge loop upper side on the syringe and inside contracts on the core bar, and cross smoothly the bulge loop endoporus and enter in the slot between the lower convex ring, at this moment, the distortion of upper lower flange recovers fully, wherein the right angle downside of bulge loop is stuck on upper flange and the syringe, bulge loop is stuck on the right angle of lower flange and lower convex ring, do not destroying lower flange, in the situation of upper lower convex ring self structure, core bar can't post-tensioning also can't on push away, then core bar is fractureed from easy incision position and can realize the self-destruction of syringe.
At this, the excessive lower flange structure of destroying of exerting oneself when avoiding the core bar post-tensioning causes that core bar is whole pulls out, the present invention is arranged with some screens projections in lower flange bottom court, this screens projection enters the endoporus of lower convex ring and offsets with inner hole wall when the core bar post-tensioning puts in place, this structure can effectively be avoided the destructive deformation counter-rotating of lower flange, stops core bar because of excessive being drawn out of exerting oneself.
To sum up, the present invention in the latching structure locking effect, has omitted the collar of assembling usefulness between assurance core bar and syringe, reduced accessory, has reduced production cost, has simplified installation step, can promote to a great extent the efficiency of assembling of core bar and syringe.
Description of drawings
The structural representation of Fig. 1, core bar of the present invention;
The enlarged drawing of A section among Fig. 2, Fig. 1 of the present invention;
The structural representation of Fig. 3, syringe of the present invention;
The enlarged drawing of B section among Fig. 4, Fig. 2 of the present invention;
Cooperation sketch map before Fig. 5, syringe of the present invention and the core bar self-destruction;
The cooperation sketch map of Fig. 6, syringe of the present invention and core bar self-destruction engaging;
The partial enlarged drawing of C section among Fig. 7, Fig. 6 of the present invention;
Fig. 8, syringe of the present invention are from after the meeting structural representation.
The specific embodiment
Shown in Fig. 1-8, but a kind of syringe of needle point retrieving safety injector and core bar latching structure comprise syringe 1 and core bar 2.
The endoporus of described syringe 1 is provided with up and down two bulge loops 11,12 at afterbody.The upper side 111 of wherein going up bulge loop 11 is the inclined-plane of a from top to bottom oblique interior setting, and the downside 112 of upper bulge loop 11 arranges with the syringe inner hole wall is vertical.The upper side 121 of lower convex ring 12 arranges with the syringe inner hole wall is vertical, the inclined-plane of oblique outer setting down on the downside 122 of lower convex ring 12 is served as reasons.Form a slot 13 between the upper lower convex ring 11,12.
Be provided with up and down two flanges 21,22 that external diameter matches with syringe 1 endoporus aperture greater than lower convex ring on the syringe 11,12 internal diameters on described core bar 2 bodies, up and down two flanges 21,22 adjacent and arrange dorsad.Upper flange 21 is towards core bar 1 head, is that a sheet type falls beveled structure.Lower flange 22 is towards core bar 2 afterbodys, and lower flange 22 can be arranged to a sheet type and fall beveled structure, also can be arranged to some elasticity support claw structures around core bar, adopts the latter in the present embodiment.Two flanges 21,22 deformable when core bar 2 post-tensionings arrive syringe 1 endoporus afterbody is crossed bulge loop 11 on the described syringe and to snap in described slot 13 locked up and down.Simultaneously on the core bar 2 near on lower flange 21,22 downside be provided with easy fracture 23.
Latching structure of the present invention only comprise up and down two bulge loops 11 on the syringe 1,12 and core bar 2 on up and down two flanges 21,22, do not had to cooperate the thimble structure of assembling usefulness, reduced accessory, reduced production cost.
When assembling, at first utilize the ramp structure of syringe lower convex ring downside 122, upper lower flange 21,22 on the core bar 2 is out of shape gradually inside contract and gos deep into lower convex ring 12 endoporus, then promote fast core bar 2, utilize the inertia of core bar 2, make also lower flange 21,22 on the core bar that does not recover fully, successfully cross slot 13 and upper bulge loop 11 endoporus and enter syringe 1 endoporus front portion and finish assembling, whole assembling process fast makes things convenient for, and can promote exponentially efficiency of assembling.
And in the self-destruction process, when core bar 2 post-tensioning, lower flange 21 on the core bar, 22 at first are out of shape under the ramp structure effect of bulge loop upper side 111 on the syringe 1 and inside contract, and cross smoothly bulge loop 11 endoporus and enter lower convex ring 11, in the slot 13 between 12, at this moment, upper lower flange 21,22 distortion recovers fully, wherein the right angle downside 112 of bulge loop 11 is stuck on upper flange 21 and the syringe, bulge loop 121 is stuck on the right angle of lower flange 22 and lower convex ring 12, do not destroying lower flange 21,22, upper lower convex ring 11, in the situation of 12 self structure, core bar 2 can't post-tensioning also can't on push away, then core bar 2 is fractureed from easy fracture 23 and can realize the self-destruction of syringe.
At this, excessive lower flange 22 structures of destroying of exerting oneself when avoiding core bar 2 post-tensioning cause core bar 2 whole pulling out, the present invention in lower flange 22 bottoms towards being arranged with some screens projections 221, each screens projection 221 relative core bar 2 around the position diameter that arranges less than two bulge loops 11 about the syringe, 12 aperture.This screens projection 221 enters the endoporus of lower convex ring 12 and offsets with its inner hole wall when core bar 2 post-tensionings put in place, this structure can effectively be avoided the destructive deformation counter-rotating of lower flange 22, stops core bar 2 because of excessive being drawn out of exerting oneself.
To sum up, the present invention in the latching structure locking effect, has omitted the collar of assembling usefulness between assurance core bar and syringe, reduced accessory, has reduced production cost, has simplified installation step, can promote to a great extent the efficiency of assembling of core bar and syringe.
The above, it only is preferred embodiments of the present invention, be not that any pro forma restriction is done in invention, every foundation know-why of the present invention still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations or modification that above embodiment does.
Claims (8)
1. but the syringe of a needle point retrieving safety injector and core bar latching structure comprise syringe and core bar, it is characterized in that: described syringe endoporus is provided with up and down two bulge loops at afterbody, forms a slot between the upper lower convex ring; Be provided with up and down two flanges that external diameter matches with syringe endoporus aperture greater than lower convex ring internal diameter on the syringe on the described core bar body, two flanges are adjacent and arrange dorsad up and down, and upper flange is towards the core bar head, and lower flange is towards the core bar afterbody; The deformable when the core bar post-tensioning arrives syringe endoporus afterbody of two flanges is crossed bulge loop on the described syringe and to snap in described slot locked up and down.
2. latching structure as claimed in claim 1, it is characterized in that: the upper side of described upper bulge loop is the inclined-plane of a from top to bottom oblique interior setting, the downside of upper bulge loop arranges with the syringe inner hole wall is vertical.
3. latching structure as claimed in claim 1, it is characterized in that: the upper side of described lower convex ring arranges with the syringe inner hole wall is vertical, the inclined-plane of oblique outer setting down on the downside of lower convex ring is served as reasons.
4. latching structure as claimed in claim 1 is characterized in that: described core bar upper flange is that a sheet type falls beveled structure.
5. latching structure as claimed in claim 1 is characterized in that: described core bar lower flange is that a sheet type falls beveled structure.
6. latching structure as claimed in claim 1 is characterized in that: described core bar lower flange is some elasticity support claw structures that arrange around core bar.
7. such as claim 1, the described latching structure of 5 and 6 arbitrary claims, it is characterized in that: described lower flange bottom is towards being arranged with some screens projections, and the relative core bar of each screens projection is around the aperture of the position diameter that arranges less than two bulge loops about the syringe.
8. latching structure as claimed in claim 1 is characterized in that: on the described core bar near on the downside of lower flange be provided with easy fracture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110239913.5A CN102949767B (en) | 2011-08-22 | 2011-08-22 | A kind of needle point can the syringe of retrieving safety injector and core bar latching structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110239913.5A CN102949767B (en) | 2011-08-22 | 2011-08-22 | A kind of needle point can the syringe of retrieving safety injector and core bar latching structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102949767A true CN102949767A (en) | 2013-03-06 |
| CN102949767B CN102949767B (en) | 2015-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110239913.5A Active CN102949767B (en) | 2011-08-22 | 2011-08-22 | A kind of needle point can the syringe of retrieving safety injector and core bar latching structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102949767B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112423815A (en) * | 2018-06-14 | 2021-02-26 | 杨森制药公司 | Pharmaceutical product preparation device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2706180Y (en) * | 2004-04-19 | 2005-06-29 | 刘蓉娥 | Jacket control type safety injector |
| CN201267664Y (en) * | 2008-10-22 | 2009-07-08 | 朱贤嫒 | Disposable syringe |
| CN201492777U (en) * | 2009-09-22 | 2010-06-02 | 江振标 | Needle cylinder and core rod clamping and locking structure of safety syringe with retractable needle point |
| CN202211912U (en) * | 2011-08-22 | 2012-05-09 | 陈巧玲 | Needle cylinder and core rod clamping structure of safety syringe with retractable needle tip |
-
2011
- 2011-08-22 CN CN201110239913.5A patent/CN102949767B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2706180Y (en) * | 2004-04-19 | 2005-06-29 | 刘蓉娥 | Jacket control type safety injector |
| CN201267664Y (en) * | 2008-10-22 | 2009-07-08 | 朱贤嫒 | Disposable syringe |
| CN201492777U (en) * | 2009-09-22 | 2010-06-02 | 江振标 | Needle cylinder and core rod clamping and locking structure of safety syringe with retractable needle point |
| CN202211912U (en) * | 2011-08-22 | 2012-05-09 | 陈巧玲 | Needle cylinder and core rod clamping structure of safety syringe with retractable needle tip |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112423815A (en) * | 2018-06-14 | 2021-02-26 | 杨森制药公司 | Pharmaceutical product preparation device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102949767B (en) | 2015-10-21 |
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Effective date of registration: 20160303 Address after: 214400 Jiangsu city of Jiangyin Province Hua Zhenlong sand Industrial Park (Shu Village) Patentee after: JIANGYIN CAINA TECHNOLOGY CO., LTD. Address before: Taizhou City, Zhejiang province 317500 Wenling City Hongxing Village LuoHeng town A District No. 120 Patentee before: Chen Qiaoling |
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| CP03 | Change of name, title or address |
Address after: 214400 Jiangsu city of Wuxi province Jiangyin City Hua Zhenlong sand Industrial Park (Shu Village) Patentee after: Adoption of Polytron Technologies Inc Address before: 214400 Jiangsu city of Jiangyin Province Hua Zhenlong sand Industrial Park (Shu Village) Patentee before: JIANGYIN CAINA TECHNOLOGY CO., LTD. |
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