CN201492777U - Needle cylinder and core rod clamping and locking structure of safety syringe with retractable needle point - Google Patents
Needle cylinder and core rod clamping and locking structure of safety syringe with retractable needle point Download PDFInfo
- Publication number
- CN201492777U CN201492777U CN2009203110173U CN200920311017U CN201492777U CN 201492777 U CN201492777 U CN 201492777U CN 2009203110173 U CN2009203110173 U CN 2009203110173U CN 200920311017 U CN200920311017 U CN 200920311017U CN 201492777 U CN201492777 U CN 201492777U
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- China
- Prior art keywords
- syringe
- core bar
- needle cylinder
- endoporus
- engaging
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- Expired - Fee Related
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Abstract
The utility model discloses a needle cylinder and core rod clamping and locking structure of a safety syringe with a retractable needle point. The needle cylinder and core rod clamping and locking structure includes a needle cylinder and a core rod, a clamping projection ring is arranged at the tail part of the inner hole of the needle cylinder, and upper and the lower side surfaces of the clamping projection ring are perpendicular to the wall of the inner hole of the needle cylinder; and an upper annular flange and a lower annular flange with the external diameters larger than the inner diameter of a clamping convex ring of the needle cylinder are arranged at intervals and matched with the aperture of the inner hole of the needle cylinder, wherein the lower flange can be deformed and penetrate the clamping convex ring when the core rod is pulled to the tail part of the inner hole of the needle cylinder, and the upper flange is tightly clamped with the upper side surface of clamping projection ring. The utility model overcomes the defect that the present needle cylinder and core rod clamping and locking structure of the safety syringe with the retractable needle pin cannot be clamped tightly, endows the clamping and locking structure with good locking effect, basically puts an end to the problem that the needle tip is exposed outside when the core rod is pulled out or pushed into the inner hole of the needle cylinder again, avoids the repeated use by a lawbreaker, and solves the safe hazards brought by waste disposal.
Description
Technical field
This utility model relates to needle point retractable safety injector, particularly needle point can the bounce back syringe and the core bar latching structure of safety injector.
Background technology
In the middle of disposible safety syringe, a kind of safety injector is wherein arranged, the retraction of its needle point is to realize by the manual post-tensioning of core bar, at this, for avoiding overexerting core bar pulled out from syringe and to cause syringe needle to expose, also push back simultaneously and make the needle pierces syringe and expose, generally all between syringe endoporus afterbody and core bar, be provided with latching structure for fear of core bar.
At present, existing latching structure generally is at syringe endoporus afterbody slot to be set, when the plug of interference cooperation is stretched to the slot position, plug distortion resets and enters slot and realize the locking of core bar, this latching structure is in the effect of to a certain degree having played the locking core bar, but because of plug is yielding structure, cause this locking effect very bad, in case core bar pulling force or thrust surpass to a certain degree, core bar can be drawn out in the same old way or be pushed syringe again, thereby causes needle point to expose, i.e. syringe self-destruction failure, not only bring potential safety hazard, also be easy to be reused simultaneously by the lawless person to offal treatment.
The utility model content
At the problems referred to above, syringe and core bar latching structure that this utility model provides needle point can bounce back safety injector, its latching structure has good locking effect, has fundamentally stopped the problem that core bar was drawn out or was pushed again the syringe endoporus.
For achieving the above object, this utility model is by the following technical solutions:
A kind of needle point can the bounce back syringe and the core bar latching structure of safety injector comprise syringe and core bar, and it is characterized in that: described syringe endoporus is provided with the prominent ring of an engaging at afterbody, and upper side, the downside of the prominent ring of engaging all are provided with the syringe inner hole wall is vertical; Be arranged at intervals with annular upper flange and lower flange that external diameter matches with syringe endoporus aperture greater than syringe engaging bulge loop internal diameter on the described core bar body, wherein described engaging bulge loop is crossed in lower flange deformable when the core bar post-tensioning arrives syringe endoporus afterbody, upper flange then with engage that prominent to encircle upper side stuck.
Above-mentioned upper flange lateral surface is a from top to bottom oblique outer ramp structure.
Above-mentioned lower flange lateral surface is a from top to bottom oblique interior ramp structure.
Be provided with a little rounding between the upper side of above-mentioned engaging bulge loop and its medial surface.
The upper surface arranged outside of above-mentioned lower flange has the engaging bead that is higher than end face.
Above-mentioned core bar body is made up of the upper body and the following body of engagement connection, and described upper flange is arranged on the upper body, and described lower flange is arranged on down on the body.
Above-mentioned latching structure also comprises a funneling assembling circle, the assembling circle is made up of our department that is connected with syringe and base plate, wherein our department's external diameter engages the syringe endoporus cooperation of bulge loop bottom with syringe, our department's endoporus epimere is the equal aperture section, its aperture engages the internal diameter of bulge loop etc. with syringe big, our department's endoporus hypomere be the aperture progressively increase face big chamfering directly.
Above-mentioned core bar body afterbody tight fit is provided with an injection pressing board, and wherein the body afterbody is used and the endoporus epimere of the connecting portion external diameter that is connected pressing board less than the equal aperture of assembling circle.
The upper side of the prominent ring of engaging of the present utility model, downside all is provided with the syringe inner hole wall is vertical, core bar upper flange and lower flange external diameter are greater than syringe engaging bulge loop internal diameter, and be a from top to bottom oblique outer ramp structure in conjunction with the upper flange lateral surface, the lower flange lateral surface is a from top to bottom oblique interior ramp structure, when making the core bar post-tensioning, the inverted cone face structure that the lower flange lateral surface forms can make its distortion cross the engaging bulge loop and reset stuck with the downside that engages bulge loop smoothly, and meanwhile, the positive taper surface structure that the upper flange lateral surface forms then can't be out of shape, it is with to engage the bulge loop upper side stuck, promptly engage bulge loop by last, lower flange is stuck fully, do not destroying upper flange, under the situation of lower flange and engaging bulge loop self structure, core bar can't post-tensioning also can't on push away, this structural design efficiently solves existing safety injector core bar and the unstable defective of syringe engaging self-destruction, fundamentally stopped to expose phenomenon because of dealing with the needle point that causes improperly, guaranteed the self-destruction effect, not only bring convenience, also can't be reused simultaneously by the lawless person to offal treatment.
At this, lower flange can be crossed the engaging bulge loop smoothly when guaranteeing the core bar post-tensioning, and engaging bulge loop of the present utility model is provided with a little rounding between side and the medial surface thereon.For strengthening the deformation performance of lower flange, the upper surface arranged outside of this utility model lower flange has the engaging bead that is higher than end face simultaneously, this structural design can effectively strengthen lower flange in the ability that contracts.In addition, outstanding engaging bead structure give add man-hour upper flange and lower flange between the demoulding brought difficulty, at this situation, this utility model is arranged to two-part structure to the core bar body, promptly form by the upper body and the following body of engagement connection, and upper flange is arranged on the upper body, and lower flange is arranged on down on the body, makes that adding the release problems in man-hour has obtained good solution.
Above structure can be good at realizing that the self-destruction of core bar and syringe is locked, but bring difficulty also for simultaneously the assembling of core bar and syringe, if both directly install, when core bar inserts syringe, the engaging bulge loop is crossed in the deformable of core bar upper flange, it is stuck but lower flange can not be out of shape with the downside of engaging bulge loop, at this situation, this utility model has designed funneling assembling circle, when mounted, at first our department of assembling circle is inserted the syringe afterbody, then core bar is faced directly the big chamfering from assembling circle our department and clamp-oned, the upper flange of core bar and lower flange are out of shape simultaneously and enter assembling circle our department endoporus equal diameter epimere, and then enter engaging bulge loop endoporus, and finally enter inner realization of syringe smoothly and install, at this moment, unload the pressing board that is provided with core bar body afterbody and its tight fit, just can take out the assembling circle and realize recycling, then the pressing board peace is gone back just to have finished whole assembling process.
Description of drawings
The structural representation of Fig. 1, this utility model syringe;
The structural representation of Fig. 2, this utility model core bar;
The enlarged drawing of A portion among Fig. 3, this utility model Fig. 1;
The enlarged drawing of B portion among Fig. 4, this utility model Fig. 2;
Cooperation sketch map before Fig. 5, this utility model syringe and the core bar self-destruction;
The cooperation sketch map of Fig. 6, this utility model syringe and core bar self-destruction engaging;
The partial enlarged drawing of C portion among Fig. 7, this utility model Fig. 6;
The structural representation of Fig. 8, this utility model core bar split-type design;
The sketch map that cooperates of Fig. 9, the funneling assembling circle of this utility model and syringe;
The local enlarged diagram of D portion among Figure 10, this utility model Fig. 5.
The specific embodiment
Shown in Fig. 1-7, a kind of needle point can the bounce back syringe and the core bar latching structure of safety injector comprise syringe 1 and core bar 2
As shown in figs. 1 and 3, described syringe 1 endoporus is provided with the prominent ring 11 of an engaging at afterbody, the upper side 111 of the prominent ring 11 of engaging, downside 112 all with the 12 vertical settings of syringe inner hole wall.
Shown in Fig. 2 and 4, be arranged at intervals with annular upper flange 21 and lower flange 22 that external diameter matches with syringe endoporus 13 apertures greater than syringe engaging bulge loop 11 internal diameters on described core bar 2 bodies, wherein described engaging bulge loop 11 is crossed in lower flange 22 deformable when the core bar post-tensioning arrives syringe endoporus 13 afterbodys, and upper flange 21 then dashes forward that to encircle upper side 111 stuck with engage.At this, upper flange 21 can be out of shape and cross engaging bulge loop 11 smoothly when guaranteeing that core bar 2 and syringe 1 are installed, and in the present embodiment, the lateral surface 211 of upper flange 21 is set to a from top to bottom oblique outer ramp structure.Lower flange 22 can be out of shape and cross engaging bulge loop 11 smoothly when guaranteeing self-destruction simultaneously, and in the present embodiment, the lateral surface 221 of lower flange 22 is set to a ramp structure in from top to bottom oblique.
The upper side 111 of the prominent ring 11 of engaging of the present utility model, downside 112 all with the 12 vertical settings of syringe inner hole wall, core bar upper flange 21 and lower flange 22 external diameters are greater than syringe engaging bulge loop 11 internal diameters, and be a from top to bottom oblique outer ramp structure in conjunction with upper flange lateral surface 211, lower flange lateral surface 221 is a from top to bottom oblique interior ramp structure, when making core bar 2 post-tensionings, the inverted cone face that lower flange lateral surface 221 structures form can make its distortion cross engaging bulge loop 11 and reset stuck with the downside 112 that engages bulge loop smoothly, and meanwhile, the positive taper surface that upper flange lateral surface 211 structures form then can't be out of shape, it is with to engage bulge loop upper side 111 stuck, promptly engage bulge loop 11 by last, lower flange 21,22 is locked fully, its structure is shown in Fig. 6 and 7, do not destroying upper flange 21, under the situation of lower flange 22 and engaging bulge loop 11 self structure, core bar 2 can't post-tensioning also can't on push away, this structural design efficiently solves existing safety injector core bar and the unstable defective of syringe engaging self-destruction, fundamentally stopped to expose phenomenon because of dealing with the needle point that causes improperly, guaranteed the self-destruction effect, not only bring convenience, also can't be reused simultaneously by the lawless person to offal treatment.
At this, lower flange 22 can be crossed engaging bulge loop 11 smoothly when guaranteeing core bar 2 post-tensionings, and engaging bulge loop 11 of the present utility model is provided with a little rounding structure 114 between side 111 and the medial surface 113 thereon, and its structure as shown in Figure 3.For strengthening the deformation performance of core bar lower flange 22, this utility model lower flange upper surface arranged outside has the engaging bead 222 that is higher than end face simultaneously, this structural design can effectively strengthen lower flange 22 in the ability that contracts, its structure is as shown in Figure 4.In addition, outstanding engaging bead 222 structures give add man-hour upper flange 21 and lower flange 22 between the demoulding brought difficulty, at this situation, this utility model is arranged to two-part structure to the core bar body, its structure as shown in Figure 8, be core bar by the upper body 2 of engagement connection ' and following body 2 " form; and upper flange 21 be arranged on upper body 2 ' on; lower flange 22 is arranged on down body 2 " on, upper body 2 ' " separate machined is ressembled again, makes that adding the release problems in man-hour has obtained good solution with following body 2.
Above structure can be good at realizing that the self-destruction of core bar 2 and syringe 1 is locked, but bring difficulty also for simultaneously the assembling of core bar 2 and syringe 1, if both directly install, when core bar 2 inserts syringe 1, engaging bulge loop 11 is crossed in 21 deformables of core bar upper flange, stuck with the downside 112 of engaging bulge loop but lower flange 22 can not be out of shape, at this situation, this utility model has designed funneling assembling circle 3.
As shown in Figure 9, assembling circle 3 is made up of our department 31 that is connected with syringe and base plate 32, wherein our department's 31 external diameters engage syringe endoporus 13 cooperations of bulge loop 11 bottoms with syringe, our department's endoporus epimere 33 is the equal aperture section, its aperture engages with syringe that the internal diameter of bulge loop 11 etc. is big, and our department endoporus hypomere 34 apertures progressively increase faces big chamfering directly.
When mounted, at first our department 31 of assembling circle 3 is inserted syringe 1 afterbody, then core bar 2 is faced directly the big chamfering from assembling circle our department endoporus hypomere 34 and clamp-oned, the upper flange 21 of core bar and lower flange 22 are out of shape simultaneously and enter assembling circle our department endoporus equal diameter epimere 33, and then enter engaging bulge loop 11 endoporus, and finally enter syringe endoporus 13 smoothly and realize installing, at this, for removing assembling circle 3, core bar 2 body afterbody tight fits of the present utility model are provided with an injection pressing board 23, its structure chart is shown in Figure 10, the body afterbody use with connecting portion 231 external diameters that are connected pressing board less than the endoporus epimere 33 of the equal aperture of assembling circle in use, unload the pressing board 23 that is provided with core bar body afterbody and its tight fit, just can take out assembling circle 3 and realize recycling, then pressing board 23 peaces are gone back just to have finished whole assembling process.
In sum, this utility model is can the bounce back syringe and the core bar latching structure of safety injector of needle point, its latching structure has good locking effect, fundamentally stop core bar and be drawn out or pushed again the problem that the overcoat endoporus causes needle point to expose, avoid the lawless person to reuse, solved the potential safety hazard that offal treatment brings.
The above, it only is better embodiment of the present utility model, be not that utility model is done any pro forma restriction, every foundation know-why of the present utility model still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations or modification that above embodiment did.
Claims (8)
1. the needle point syringe and the core bar latching structure of safety injector that can bounce back comprises syringe and core bar, and it is characterized in that: described syringe endoporus is provided with the prominent ring of an engaging at afterbody, and upper side, the downside of the prominent ring of engaging all are provided with the syringe inner hole wall is vertical; Be arranged at intervals with annular upper flange and lower flange that external diameter matches with syringe endoporus aperture greater than syringe engaging bulge loop internal diameter on the described core bar body, wherein described engaging bulge loop is crossed in lower flange deformable when the core bar post-tensioning arrives syringe endoporus afterbody, upper flange then with engage that prominent to encircle upper side stuck.
2. syringe as claimed in claim 1 and core bar latching structure is characterized in that: described lower flange lateral surface is a from top to bottom oblique interior ramp structure.
3. syringe as claimed in claim 1 or 2 and core bar latching structure is characterized in that: described upper flange lateral surface is a from top to bottom oblique outer ramp structure.
4. syringe as claimed in claim 1 or 2 and core bar latching structure is characterized in that: be provided with a little rounding between the upper side of described engaging bulge loop and its medial surface.
5. syringe as claimed in claim 1 or 2 and core bar latching structure is characterized in that: the upper surface arranged outside of described lower flange has the engaging bead that is higher than end face.
6. syringe as claimed in claim 5 and core bar latching structure is characterized in that: described core bar body is made up of the upper body and the following body of engagement connection, and described upper flange is arranged on the upper body, and described lower flange is arranged on down on the body.
7. syringe as claimed in claim 1 or 2 and core bar latching structure, it is characterized in that: described latching structure also comprises a funneling assembling circle, the assembling circle is made up of our department that is connected with syringe and base plate, wherein our department's external diameter engages the syringe endoporus cooperation of bulge loop bottom with syringe, our department's endoporus epimere is the equal aperture section, its aperture engages the internal diameter of bulge loop etc. with syringe big, our department's endoporus hypomere be the aperture progressively increase face big chamfering directly.
8. syringe as claimed in claim 7 and core bar latching structure is characterized in that: described core bar body afterbody tight fit is provided with an injection pressing board, and wherein the body afterbody is used and the endoporus epimere of the connecting portion external diameter that is connected pressing board less than the equal aperture of assembling circle.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203110173U CN201492777U (en) | 2009-09-22 | 2009-09-22 | Needle cylinder and core rod clamping and locking structure of safety syringe with retractable needle point |
| CN2010900011463U CN202844269U (en) | 2009-09-10 | 2010-04-16 | Disposable safety syringe having retractable needle point |
| US13/395,402 US20120172799A1 (en) | 2009-09-10 | 2010-04-16 | Disposable safety syringe with retractable needle tip |
| PCT/CN2010/000520 WO2011029264A1 (en) | 2009-09-10 | 2010-04-16 | Disposable safety injector with retractable needle |
| AU2010292789A AU2010292789A1 (en) | 2009-09-10 | 2010-04-16 | Disposable safety injector with retractable needle |
| RU2012113827/14A RU2012113827A (en) | 2009-09-10 | 2010-04-16 | DISPOSABLE SAFE SYRINGE WITH TAKING-OFF TIP NEEDLE |
| BR112012005102A BR112012005102A2 (en) | 2009-09-10 | 2010-04-16 | retractable safety syringe with retractable needle tip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203110173U CN201492777U (en) | 2009-09-22 | 2009-09-22 | Needle cylinder and core rod clamping and locking structure of safety syringe with retractable needle point |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201492777U true CN201492777U (en) | 2010-06-02 |
Family
ID=42435987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203110173U Expired - Fee Related CN201492777U (en) | 2009-09-10 | 2009-09-22 | Needle cylinder and core rod clamping and locking structure of safety syringe with retractable needle point |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201492777U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012126342A1 (en) * | 2011-03-18 | 2012-09-27 | 常州和康医疗器材有限公司 | Structure for use in disposable injector and disposable injector |
| CN102949767A (en) * | 2011-08-22 | 2013-03-06 | 陈巧玲 | Syringe and core rod locking structure of safety injector with telescopic tip |
-
2009
- 2009-09-22 CN CN2009203110173U patent/CN201492777U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012126342A1 (en) * | 2011-03-18 | 2012-09-27 | 常州和康医疗器材有限公司 | Structure for use in disposable injector and disposable injector |
| CN102949767A (en) * | 2011-08-22 | 2013-03-06 | 陈巧玲 | Syringe and core rod locking structure of safety injector with telescopic tip |
| CN102949767B (en) * | 2011-08-22 | 2015-10-21 | 陈巧玲 | A kind of needle point can the syringe of retrieving safety injector and core bar latching structure |
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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: 20100602 Termination date: 20150922 |
|
| EXPY | Termination of patent right or utility model |