CN212699940U - Rotary retraction type puncture-proof syringe - Google Patents
Rotary retraction type puncture-proof syringe Download PDFInfo
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- CN212699940U CN212699940U CN202021954254.4U CN202021954254U CN212699940U CN 212699940 U CN212699940 U CN 212699940U CN 202021954254 U CN202021954254 U CN 202021954254U CN 212699940 U CN212699940 U CN 212699940U
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- retraction
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Abstract
The utility model discloses a rotary retraction type puncture-proof injector, which comprises a needle cylinder, a push rod and an injection needle, wherein the end part of the push rod in the needle cylinder is provided with a piston and a connecting rod rotating nut, and is respectively provided with a through hole and an unlocking rotating groove in the piston and the connecting rod rotating nut; the retractable rod is sleeved with a spring, the end part of the retractable rod is connected with a positioning lock nut, a plurality of positioning lock platforms which are used for positioning the positioning lock nuts and overcoming the elasticity of the spring to enable the positioning lock platforms to be in a compressed state are arranged in the retractable hole, an unlocking gap is formed between every two positioning lock platforms, and a positioning lock groove is formed in each positioning lock platform. The utility model provides stability around the function of stabbing is prevented in the high syringe resilience, convenient operation, use are also reliable, effectively guarantee to cause the condition of stabbing to the human body after the syringe uses, improve the security of using.
Description
Technical Field
The utility model relates to the technical field of syringes, concretely relates to rotatory formula of contracting prevents stinging syringe.
Background
The injector is a common medical appliance, and an injection needle on the injector is an important part in the injection and medicine preparation process; before injection, dispensing and using, the injection needle of the injector is generally provided with a protective cap for protection, and when the injection needle is not used, the needle body is positioned in the protective cap and cannot cause puncture injury to medical staff; after the injection needle is used, the medical staff usually cannot sleeve the protective cap on the needle again due to large workload and working strength of the medical staff, so that the exposed sharp needle is easy to stab the medical staff, and the exposed needle cannot stab the staff in the centralized placing and recycling process; the liquid medicine and germs used for injection are mostly remained on the used injection needle and the needle head, and the risk of germ infection is easily caused by puncture wound under any condition.
Therefore, the retractable syringe in the market can retract the needle body of the injection needle into the retractable syringe, and most of the retraction structures in the existing market adopt the structure matching of a spring and a sliding rod to pull the needle body of the injection needle back into the syringe; in the existing structure, a convex rib is mainly adopted to position the end part of a sliding rod before injection, so that a spring on the sliding rod is kept compressed, the structure of the convex rib is stiff and has poor elasticity, and the following binary contradictory conditions are satisfied at the position, namely the spring can resist the counterforce of the spring, the force of the spring cannot be small, otherwise a needle head cannot be effectively pulled back, the force of the spring is large, the rib must be inwards convex enough, otherwise the counterforce of the spring cannot be resisted; the size of the inward convex rib is influenced by the forced demolding of the mold, and the size of the convex rib is also influenced by the assembly, so that the size adjustment is limited; therefore, the existing structure causes the phenomenon that the installation and the positioning of the spring and the sliding rod are not stable enough, the retraction can not be realized frequently, and the use is influenced.
Disclosure of Invention
The utility model aims at solving the problem in the prior art and providing a rotary retractable anti-puncture syringe.
In order to achieve the above purpose, the technical scheme of the utility model is that: a rotary retraction type puncture-proof injector comprises a needle cylinder, a push rod and an injection needle, wherein a piston and a connecting rod rotating nut are arranged on the end part of the push rod, which is positioned in the needle cylinder, a through hole and an unlocking rotating groove are respectively arranged in the piston and the connecting rod rotating nut, a retraction hole is arranged in the push rod, a retraction rod is connected in the retraction hole, and a rotary convex column which is correspondingly matched with the unlocking rotating groove is arranged on the retraction rod; the telescopic rod is sleeved with a spring, one end of the telescopic rod penetrates through the unlocking rotating groove and the through hole, the other end of the telescopic rod is fixedly connected with a positioning lock nut, a plurality of positioning lock platforms which are used for positioning the positioning lock nuts and overcoming the elastic force of the spring to enable the telescopic rod to be in a compressed state are arranged in the telescopic hole, an unlocking gap is formed between every two positioning lock platforms, a positioning lock groove is formed in each positioning lock platform, and a positioning lock column which corresponds to the positioning lock platforms respectively and can be positioned in the positioning lock groove is arranged on each positioning lock nut.
The injection needle comprises an outer needle seat, an inner needle seat, a positioning switch and a needle body, wherein the needle body is connected with the inner needle seat, the inner needle seat is arranged in the outer needle seat and is positioned through the positioning switch, the inner needle seat is respectively provided with a positioning step and an unlocking step, and the circumference of the end part of the positioning switch is uniformly provided with a plurality of elastic positioning claws; the end part of the retraction rod is provided with a hanging buckle hole, a hanging buckle boss is arranged in the hanging buckle hole, and the retraction rod can release the positioning of the positioning switch on the inner needle base and can form a buckle with the inner needle base to carry out synchronous motion.
The number of the positioning lock columns corresponds to the number of the positioning lock platforms.
The retraction hole is internally provided with a retraction stop boss, and the positioning lock nut is provided with a plurality of stop bosses which can form positioning support with the retraction stop boss.
The maximum diameter of the inner needle base is smaller than the diameters of the through hole, the unlocking rotating groove and the retraction hole, and the diameter formed by the rotating convex column on the retraction rod is smaller than the inner diameter of the spring.
A plurality of thinning cavities are arranged in the piston.
The number of the rotary convex columns corresponds to the number of the unlocking rotary grooves in the connecting rod rotary nut.
The end part of the push rod is provided with an installation groove, and the connecting rod rotating nut is fixedly installed at the end part of the push rod in a propping and pressing mode through a piston.
The positioning lock nut is provided with a retraction rod connecting hole which is triangular, and the part of the retraction rod connected in the retraction rod connecting hole is also triangular.
And a fixing boss for forming positioning and clamping fixation on the positioning switch is arranged in the outer needle base.
Adopt above technical scheme, the utility model discloses following beneficial effect has:
compared with the prior art, after the injection use, the utility model continues to apply force to push the push rod, so that the retraction rod at the end part of the push rod extends into the positioning switch, the positioning effect of the positioning switch on the inner needle base is relieved, and meanwhile, the buckling connection is formed between the retraction rod and the inner needle base; when the end part of the retraction rod abuts against the inner needle seat, the force application reaction of the push rod acts on the retraction rod at the moment, the retraction rod rotates and moves along the unlocking rotating groove through the rotating convex column and drives the positioning lock nut at the end part to rotate at the same time, the positioning lock nut slightly rotates to slide out from the positioning lock groove on the positioning lock platform, the positioning lock cylinder on the positioning lock nut synchronously rotates to correspond to the unlocking gap and slides out under the elastic action of the spring, so that the positioning action of the positioning lock nut disappears, the elastic force of the spring is released, and the retraction rod, the inner needle seat and the needle body are moved into the push rod in a rebounding manner.
The utility model discloses redesign the location of retraction rod and the motion mode that contracts, not only improve the spring and contract the stability before the retraction rod uses, in addition use the back as long as continue the application of force a little can fix a position the unblock, make the spring force release with the needle body pull of syringe needle to the push rod in can through the rotatory movement that contracts the rod conversion, both convenient operation, use also reliable, effectively guarantee to cause the condition of stabbing to the human body after the syringe uses, improve the security of using.
Drawings
FIG. 1 is a cross-sectional view of the present invention (with the positioning switch unlocked by the retraction lever after injection);
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is an enlarged view of portion B of FIG. 1;
fig. 4 is an exploded perspective view of the present invention;
FIG. 5 is a perspective sectional view of the push rod of the present invention;
fig. 6 is a sectional view of the present invention (in the state of entering the puncture-proof state after use).
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 to 6, the utility model provides a rotatory formula of retracting prevents stabbing syringe, including cylinder 1, push rod 2, syringe needle, push rod 2 is provided with piston 3 and connecting rod swivel nut 4 on being in the tip of cylinder 1 and is provided with through-hole 5, unblock swivelling chute 6 respectively in both, wherein is provided with mounting groove 7 at push rod 2 tip, piston 3 and push rod 2 fixed connection and support pressure fixed mounting in the mounting groove 7 of push rod 2 with connecting rod swivel nut 4.
A retraction hole 8 is formed in the push rod, a retraction rod 9 is connected in the retraction hole 8, one end of the retraction rod 9 penetrates through the unlocking rotating groove 6 and the through hole 5, and the other end of the retraction rod 9 is relatively and fixedly connected with a positioning lock nut 10, wherein a spring 11 is sleeved on the retraction rod 9, one end of the spring 11 abuts against the connecting rod rotating nut 4, one end of the spring 11 abuts against the positioning lock nut 10 on the retraction rod 9, a plurality of positioning lock platforms 12 which position the positioning lock nuts 10 are arranged in the retraction hole 8, and the positioning force of the positioning lock platforms 12 for positioning the positioning lock nuts 10 is larger than the elastic force of the spring 11, so that the retraction rod 9 is positioned in the retraction hole 8, and the spring 11 is in a compressed state; the injection needle comprises an outer needle base 13, an inner needle base 14, a positioning switch 15 and a needle body 16, wherein the needle body 16 is connected with the inner needle base 14, the inner needle base 14 is arranged in the outer needle base 13, a fixing boss 17 which forms positioning clamping fixation on the positioning switch 15 is arranged in the outer needle base 13, so that the positioning switch 15 is positioned, a positioning step 18 and an unlocking step 19 are respectively arranged on the inner needle base 14, a plurality of elastic positioning claws 20 are uniformly arranged on the circumference of the end part of the positioning switch 15, and the inner needle base is abutted against the positioning step 18 by the elastic positioning claws 20 to form positioning installation; the end part of the retraction rod 9 is provided with a hanging and buckling hole 21, and a hanging and buckling boss 22 is arranged in the hanging and buckling hole 21.
The retractable rod 9 is provided with rotary protruding columns 23 corresponding to the unlocking rotary grooves 6, the number of the rotary protruding columns 23 corresponds to the number of the unlocking rotary grooves 6 in the connecting rod rotary nut 4, an unlocking gap 24 is formed between every two of the positioning lock platforms 12, the positioning lock platforms 12 are provided with positioning lock grooves 25, the positioning lock nuts 10 are provided with positioning lock columns 26 corresponding to the positioning lock platforms 12 respectively and capable of being positioned in the positioning lock grooves 25, and the number of the positioning lock columns 26 corresponds to the number of the positioning lock platforms 12.
After the injection use is finished, the force is continuously applied to the push rod 2, the end piston 3 is compressed under the pressure, the piston 3 is compressed to enable the push rod 2 to drive the retraction rod 9 at the end part to continuously move, the end part of the retraction rod 9 props up the elastic positioning claw 20 on the positioning switch 15, so that the positioning of the positioning switch 15 on the inner needle base 14 is released, and the inner needle base 14 can form a buckle through the buckle boss 22 in the buckle hole 21 at the end part to carry out synchronous motion; on the rear force application reaction retraction rod 9 after the positioning of the inner needle base 14 is released, the rotary convex column 23 on the retraction rod 9 enters the unlocking rotary groove 6 of the connecting rod rotary nut 4 to rotate, the positioning lock nut 10 is provided with a retraction rod connecting hole 27, the retraction rod connecting hole 27 is triangular, the part of the retraction rod 9 connected in the retraction rod connecting hole 27 is also triangular, so that the retraction rod 9 and the positioning lock nut 10 are fixedly connected relatively, and the positioning lock nut 10 and the retraction rod 9 synchronously rotate; when the retraction rod 9 rotates and moves, the positioning lock nut 10 rotates at the same time, after the positioning lock nut 10 rotates and moves to correspond to the unlocking gap 24, the positioning lock platform 12 in the retraction hole 8 loses the positioning effect on the positioning lock nut 10, at the moment, the elastic force of the spring 11 is released, the positioning lock nut 10 is propped against under the elastic force of the spring 11 and drives the retraction rod 9 to move, so that the inner needle seat 14 buckled with the retraction rod 9 at the moment and the needle body 16 fixed with the inner needle seat 14 are brought into the retraction hole 8 of the push rod 2, and the needle body is effectively prevented from stabbing a human body after injection use.
Further, the maximum diameter of the inner needle seat 14 is smaller than the diameters of the through hole 5, the unlocking rotating groove 6 and the retraction hole 8, so that the inner needle seat 14 and the retraction rod 9 cannot be influenced to synchronously move into the retraction hole 8, and the diameter formed by the rotating convex column 23 on the retraction rod 9 is smaller than the inner diameter of the spring 11, so that the retraction rod cannot be influenced to pass through and move from the inside of the spring; a retraction stop boss 28 is arranged in the retraction hole 8, and a plurality of stop bosses 29 which can form positioning support with the retraction stop boss 28 are arranged on the positioning lock nut 10, so that the positioning lock nut 10 is limited when the spring 11 retracts and moves, and all parts are prevented from popping out of the retraction hole 8 of the push rod 2 under the action of the spring 11; of course, other limiting means can be adopted on the push rod.
Furthermore, a plurality of thinning cavities 30 are arranged in the piston 3, so that the piston is more labor-saving to be thinned, and the retraction rod at the end part of the push rod is easier to remove the positioning effect of the positioning switch on the inner needle base.
The rotary retractable anti-puncture syringe provided by the embodiment of the present invention is described in detail above, and the principle and the implementation of the present invention are explained by applying specific examples, and the description of the above embodiments is only used to help understanding the technical solution disclosed by the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (10)
1. The utility model provides a rotatory formula of contracting prevents stabbing syringe, includes cylinder, push rod, syringe needle, its characterized in that: the end part of the push rod in the needle cylinder is provided with a piston and a connecting rod rotating nut, and a through hole and an unlocking rotating groove are respectively arranged in the piston and the connecting rod rotating nut; the telescopic rod is sleeved with a spring, one end of the telescopic rod penetrates through the unlocking rotating groove and the through hole, the other end of the telescopic rod is fixedly connected with a positioning lock nut, a plurality of positioning lock platforms which are used for positioning the positioning lock nuts and overcoming the elastic force of the spring to enable the telescopic rod to be in a compressed state are arranged in the telescopic hole, an unlocking gap is formed between every two positioning lock platforms, a positioning lock groove is formed in each positioning lock platform, and a positioning lock column which corresponds to the positioning lock platforms respectively and can be positioned in the positioning lock groove is arranged on each positioning lock nut.
2. A rotary retractable anti-stab syringe as in claim 1, wherein: the injection needle comprises an outer needle seat, an inner needle seat, a positioning switch and a needle body, wherein the needle body is connected with the inner needle seat, the inner needle seat is arranged in the outer needle seat and is positioned through the positioning switch, the inner needle seat is respectively provided with a positioning step and an unlocking step, and the circumference of the end part of the positioning switch is uniformly provided with a plurality of elastic positioning claws; the end part of the retraction rod is provided with a hanging buckle hole, a hanging buckle boss is arranged in the hanging buckle hole, and the retraction rod can release the positioning of the positioning switch on the inner needle base and can form a buckle with the inner needle base to carry out synchronous motion.
3. A rotary retractable anti-stab syringe as in claim 1, wherein: the number of the positioning lock columns corresponds to the number of the positioning lock platforms.
4. A rotary retractable anti-stab syringe as in claim 1, wherein: the retraction hole is internally provided with a retraction stop boss, and the positioning lock nut is provided with a plurality of stop bosses which can form positioning support with the retraction stop boss.
5. A rotary retractable anti-stab syringe as in claim 2, wherein: the maximum diameter of the inner needle base is smaller than the diameters of the through hole, the unlocking rotating groove and the retraction hole, and the diameter formed by the rotating convex column on the retraction rod is smaller than the inner diameter of the spring.
6. A rotary retractable anti-stab syringe as in claim 1, wherein: a plurality of thinning cavities are arranged in the piston.
7. A rotary retractable anti-stab syringe as in claim 1, wherein: the number of the rotary convex columns corresponds to the number of the unlocking rotary grooves in the connecting rod rotary nut.
8. A rotary retractable anti-stab syringe as in claim 1, wherein: the end part of the push rod is provided with an installation groove, and the connecting rod rotating nut is fixedly installed at the end part of the push rod in a propping and pressing mode through a piston.
9. A rotary retractable anti-stab syringe as in claim 1, wherein: the positioning lock nut is provided with a retraction rod connecting hole which is triangular, and the part of the retraction rod connected in the retraction rod connecting hole is also triangular.
10. A rotary retractable anti-stab syringe as in claim 2, wherein: and a fixing boss for forming positioning and clamping fixation on the positioning switch is arranged in the outer needle base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021954254.4U CN212699940U (en) | 2020-09-09 | 2020-09-09 | Rotary retraction type puncture-proof syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021954254.4U CN212699940U (en) | 2020-09-09 | 2020-09-09 | Rotary retraction type puncture-proof syringe |
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| Publication Number | Publication Date |
|---|---|
| CN212699940U true CN212699940U (en) | 2021-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021954254.4U Active CN212699940U (en) | 2020-09-09 | 2020-09-09 | Rotary retraction type puncture-proof syringe |
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| CN (1) | CN212699940U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111973840A (en) * | 2020-09-09 | 2020-11-24 | 浙江康康医疗器械股份有限公司 | Rotary retraction type puncture-proof syringe |
| CN113730731A (en) * | 2021-09-01 | 2021-12-03 | 江苏治宇医疗器材有限公司 | Anti-needle-stick safety device for injection device |
-
2020
- 2020-09-09 CN CN202021954254.4U patent/CN212699940U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111973840A (en) * | 2020-09-09 | 2020-11-24 | 浙江康康医疗器械股份有限公司 | Rotary retraction type puncture-proof syringe |
| CN113730731A (en) * | 2021-09-01 | 2021-12-03 | 江苏治宇医疗器材有限公司 | Anti-needle-stick safety device for injection device |
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