CN203507240U - Safety type injector - Google Patents
Safety type injector Download PDFInfo
- Publication number
- CN203507240U CN203507240U CN201320481643.3U CN201320481643U CN203507240U CN 203507240 U CN203507240 U CN 203507240U CN 201320481643 U CN201320481643 U CN 201320481643U CN 203507240 U CN203507240 U CN 203507240U
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- China
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- connector
- needle stand
- groove
- overcoat
- degree
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- Expired - Lifetime
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a safety type injector which is composed of an outer sleeve, a core rod, a rubber plug, a connecting part, a seal ring and a needle base. The safety type injector is characterized in that outer sleeve grooves are evenly formed in the front of the inner wall of the outer sleeve, needle base bosses are evenly distributed on the outer surface of the needle base and used for being matched with the outer sleeve grooves, and needle base elastic clamping claws are machined on the inner side of a needle base conical head and used for being matched with the core rod; connecting part bosses are arranged on the outer surface of the connecting part and used for being matched with the outer sleeve grooves. Connecting part elastic clamping claws are machined at the inner wall of the top of the connecting part and used for being matched with the core rod. A front tower-shaped reverse hook and a rear tower-shaped reverse hook are additionally arranged at the top end of the core rod and used for being matched with the needle base elastic clamping claws and the connecting part elastic clamping claws respectively. After the product is used, the core rod is pulled back to drive the whole injector to retract into the outer sleeve of the injector, the core rod is clamped in the outer sleeve, so that the injector does not enter or exit from the two ends of the outer sleeve, medical staff do not need to pull the injector out, and the situation that the medical staff selves or others are punctured is prevented or reduced.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments of injection, especially relates to a kind of safety injector.
Background technology
At present, the syringe that medical field is conventional is substantially all by being that overcoat, plug and core bar form.Plug is enclosed within core bar head and forms push rod, and push rod packs overcoat inner chamber into.Medical personnel before use, screw the needle stand conehead of entry needle and syringe, and after suction, liquid medicine injection are finished using, in order to prevent that medical supplies cleaning personnel are by pricking wound, medical personnel need entry needle is separated with syringe, processing.Yet in medical personnel's separation process, its used exposed entry needle very easily injures own or other personnel, causes infected.
Summary of the invention
The purpose of this utility model be to provide a kind of prevention and reduce medical worker oneself or other people can not be wounded by stabbing, safety injector easy to use, simple in structure.
The purpose of this utility model is achieved in that
A kind of safety injector, by overcoat, core bar, plug, connector, sealing ring and needle stand, formed, entry needle screws and is connected with needle stand conehead on needle stand, feature is: in the front portion of outer casing inner wall, be evenly provided with 2～4 overcoat grooves for coordinating with needle stand and connector, outer surface at needle stand is uniformly distributed 2-4 the needle stand boss for matching with overcoat groove, in the middle part of needle stand, be processed with for the o-ring groove of sealing ring, annular is installed, in the inner side of needle stand conehead, be processed with the needle stand elastic card claw for coordinating with core bar; At the outer surface of connector, there is 2-4 for the connector boss with overcoat groove fit, in the top inner wall of connector, be processed with the connector elastic card claw for coordinating with core bar; On the top of core bar, be added with two and be respectively used to the front tower-like barb and the rear tower-like barb that coordinate with needle stand elastic card claw and connector elastic card claw, to guarantee that front tower-like barb and rear tower-like barb, respectively by after needle stand elastic card claw and connector elastic card claw, can not pull in the other direction.
Groove at outer casing inner wall is provided with groove buckle, is processed with the connector buckle matching with groove buckle on connector boss.
At outer casing inner wall, be evenly coated with the silicone oil of lubricate.
This utility model forms stopping mechanism jointly by groove buckle and connector buckle, by the front tower-like barb of core bar, rear tower-like barb and needle stand elastic card claw, connector elastic card claw, jointly forms pumpback mechanism.This utility model in use, than the many steps of traditional injector for medical purpose operating procedure, exactly after product is finished using, core bar is pulled back, driven whole injection needle restoring to the overcoat of syringe, and core bar is stuck in overcoat, makes the entry needle can not be from two turnover of overcoat, medical personnel are without extracting entry needle again, prevent and reduced own or other people can not be wounded by stabbing.
This utility model in use, first screws the conehead of adaptive entry needle and syringe, takes out the protective sleeve of entry needle.Entry needle is inserted in medical liquid container, and the mode by pull push rod is drawn into medicinal liquid in syringe.This is all the same with traditional injector operations, key is between needle stand, connector and overcoat, to form a stopping mechanism, in puncture, needle stand is subject to the impact resistance F of moment, this impact resistance is to become 30 degree angle faces to be communicated on the inclined-plane of connector with centrage, due to force resolution, the power acting on the inclined-plane of connector only has F*sin30
.=0.5F, because inclined-plane resolves into two power F1 and F2 that become 90 degree right angles by the power of inclined-plane vertical direction after stressed, yet wherein needle stand presses down the power F1=0.5F*0.5F=0.25F=1/4F of connector, press down direction and have connector buckle and groove buckle, so slackening gradually of power has again the cooperation of connector buckle and groove buckle to stop simultaneously, so needle stand is difficult to move down, thereby reached the object that prevents the stressed rollback of needle stand.After puncture completes, the front tower-like barb of core bar and rear tower-like barb place coordinate with needle stand elastic card claw and connector elastic card claw respectively, after guaranteeing that front tower-like barb and rear tower-like barb are by needle stand elastic card claw and connector elastic card claw, can not pull in the other direction.When pumpback core bar, because connector and groove buckle are also into 30 degree angles, and now connector is not subject to the effect of needle stand power, so connector is under the effect of core bar back-suction, along with the angular turn of groove buckle finally departs from connector buckle easily.During core bar pumpback 2mm stroke, needle stand is subject to the back-suction of core bar, owing to now there is no the obstruction of connector, so needle stand is also pulled very easily, reaches entry needle and retracts in syringe jacket completely.
Product is after finishing using, and medical personnel pull back core bar, has driven whole injection needle restoring to overcoat, and core bar is stuck in overcoat, make the entry needle can not be from two turnover of overcoat, medical personnel be without extracting entry needle again, prevent and reduced own or other people can not be wounded by stabbing.
Therefore, the utlity model has entry needle all can be retracted in overcoat, prevention and reduce medical worker oneself or other people can not be wounded by stabbing, prevent the advantage of malpractice.
Accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present utility model;
Fig. 2 is the sectional structure schematic diagram of overcoat;
Fig. 3 is the sectional structure schematic diagram of core bar
Fig. 4 is the structural representation of connector;
Fig. 5 is the sectional structure schematic diagram of connector;
Fig. 6 is the structural representation of needle stand;
Fig. 7 is the sectional structure schematic diagram of needle stand;
Fig. 8 is the force analysis schematic diagram of needle stand and connector.
The specific embodiment
Below in conjunction with embodiment and contrast accompanying drawing this utility model is described in further detail.
A kind of safety injector, by overcoat 1, core bar 2, plug 3, connector 4, sealing ring 5 and needle stand 6, formed, entry needle 7 screws and is connected with needle stand conehead 64 on needle stand 6, in the front portion of outer casing inner wall 12, be evenly provided with 2～4 overcoat grooves 11, for with the coordinating of needle stand 6 and connector 4, play retaining effect; Outer surface at needle stand 6 is uniformly distributed 2-4 the needle stand boss 61 for matching with overcoat groove 11, in the middle part of needle stand 6, be processed with for the o-ring groove 62 of sealing ring 5, annular is installed, sealing ring 5 coordinates sealing, the without leakage effect played with outer casing inner wall 11, be processed with the needle stand elastic card claw 63 for coordinating with core bar 2 in the inner side of needle stand conehead 64; Outer surface at connector 4 has 2-4 the connector boss 41 for coordinating with overcoat groove 11,, in the top inner wall of connector 4, be processed with the connector elastic card claw 42 for coordinating with core bar 2; On the top of core bar 2, be added with two and be respectively used to the front tower-like barb 21 and the rear tower-like barb 22 that coordinate with needle stand elastic card claw 63 and connector elastic card claw 42, to guarantee that front tower-like barb 21 and rear tower-like barb 22, respectively by after needle stand elastic card claw 63 and connector elastic card claw 42, can not pull in the other direction.
In overcoat groove 11, be provided with groove buckle 13, on connector boss 41, be processed with the connector buckle 43 matching with groove buckle 13.
At outer casing inner wall 12, be evenly coated with the silicone oil of lubricate.
The osculum width of overcoat groove 11 is 1-1.5mm, and a large mouthful width is 2-3mm, groove depth 1mm; The width of o-ring groove 62 is 1.5mm, degree of depth 0.9mm.
The degree of depth 0.3mm of groove buckle 13, angle 30-45 degree, the degree of depth 0.25mm of connector buckle 43, angle 30-45 degree.
The width of needle stand boss 61 is 1.5mm, thickness 0.9-1mm, and angle becomes 30-45 degree with centrage; The width of connector boss 41 is 0.9-1mm, angle 30-45.
The thickness of needle stand elastic card claw 62 is 0.3-0.5mm, the thickness 0.3-0.5mm of connector elastic card claw 42.
The front tower-like barb 21 at core bar 2 tops and the diameter 1.5-2mm of rear tower-like barb 22, angle 30-50 degree.
The angle 160-170 degree at plug 3 tops.
Concrete mechanism is as follows:
1, retaining: needle stand 6 is prepared to sealing ring 5, pushed in outer casing inner wall 12 by needle stand 6, needle stand boss 61 enters in overcoat groove 11, by the top of overcoat groove 11, needle stand 6 is spacing, is pushed directly to the end.Then connector 4 is pushed to outer casing inner wall 12, connector boss 41 enters overcoat groove 11, collide with the inclined-plane of needle stand boss 61 simultaneously, when being pushed to the end, connector 4 can rotate the angle of about 10 degree under the guiding of the inclined-plane of needle stand boss 61, groove buckle 13 matches with connector buckle 43, now can hear clear and melodious sound, sound shows that connector 4 and coordinating of overcoat 1 put in place, needle stand 6 is fixed on to the centre of connector 4 and overcoat 1 simultaneously, rollback while preventing that the top of needle stand 6 is stressed, by connector 4, needle stand 6, cooperation between overcoat 1 this three, form a reliable stopping mechanism, thereby guaranteed that syringe is in piercing process, entry needle and needle stand can rollbacks, prevent malpractice.
2, pumpback: when core bar 2 pushes liquid medicine injection forward gradually in overcoat inner chamber, the front tower-like barb 21 of core bar 2 front ends is first by the connector elastic card claw 42 at connector 4 tops, then by the needle stand elastic card claw 62 in needle stand conehead 64, now the rear tower-like barb 22 of core bar 2 front ends is just by connector elastic card claw 42.When safety injector has been injected medicinal liquid, core bar 2 pumpbacks, the rear tower-like barb 22 of core bar 2 first touches connector 4, make connector 4 along with core bar 2 together pumpback, because connector 4 now is not subject to the power that needle stand 6 transmits, so under the back-suction effect of core bar 2, connector buckle 43 is easy to just be separated from, connector 4 departs from overcoat 1.When pumpback 2mm, the front tower-like barb 21 of core bar 2 touches needle stand 6, drive needle stand 6 pumpback backward, at this moment needle stand 6 and entry needle 7 are along with rollback together with core bar 2, until entry needle 7 all retracts in overcoat, and core bar 2 is stuck in overcoat 1, makes the entry needle 7 can not be from two turnover of overcoat 1, medical personnel are without extracting entry needle 7 again, prevent and reduced own or other people can not be wounded by stabbing.
Claims (9)
1. a safety injector, by overcoat, core bar, plug, connector, sealing ring and needle stand, formed, entry needle screws and is connected with needle stand conehead on needle stand, it is characterized in that: in the front portion of outer casing inner wall, be evenly provided with 2～4 overcoat grooves for coordinating with needle stand and connector, outer surface at needle stand is uniformly distributed 2-4 the needle stand boss for matching with overcoat groove, in the middle part of needle stand, be processed with for the o-ring groove of sealing ring, annular is installed, in the inner side of needle stand conehead, be processed with the needle stand elastic card claw for coordinating with core bar; At the outer surface of connector, there is 2-4 for the connector boss with overcoat groove fit, in the top inner wall of connector, be processed with the connector elastic card claw for coordinating with core bar; On the top of core bar, be added with two and be respectively used to the front tower-like barb and the rear tower-like barb that coordinate with needle stand elastic card claw and connector elastic card claw.
2. safety injector according to claim 1, is characterized in that: the groove at outer casing inner wall is provided with groove buckle, is processed with the connector buckle matching with groove buckle on connector boss.
3. safety injector according to claim 1 and 2, is characterized in that: the silicone oil that is evenly coated with lubricate at outer casing inner wall.
4. safety injector according to claim 2, is characterized in that: the degree of depth 0.3mm of groove buckle, angle 30-45 degree, the degree of depth 0.25mm of connector buckle, angle 30-45 degree.
5. safety injector according to claim 1, is characterized in that: the osculum width of overcoat groove is 1-1.5mm, and a large mouthful width is 2-3mm, groove depth 1mm; The width of o-ring groove is 1.5mm, degree of depth 0.9mm.
6. safety injector according to claim 1, is characterized in that: the width of needle stand boss is 1.5mm, thickness 0.9-1mm, and angle becomes 30-45 degree with centrage; The width of connector boss is 0.9-1mm, angle 30-45.
7. safety injector according to claim 1, is characterized in that: the thickness of needle stand elastic card claw is 0.3-0.5mm the thickness 0.3-0.5mm of connector elastic card claw.
8. safety injector according to claim 1, is characterized in that: the front tower-like barb at core bar top and the diameter 1.5-2mm of rear tower-like barb, angle 30-50 degree.
9. safety injector according to claim 1, is characterized in that: the angle 160-170 degree at plug top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320481643.3U CN203507240U (en) | 2013-08-08 | 2013-08-08 | Safety type injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320481643.3U CN203507240U (en) | 2013-08-08 | 2013-08-08 | Safety type injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203507240U true CN203507240U (en) | 2014-04-02 |
Family
ID=50366227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320481643.3U Expired - Lifetime CN203507240U (en) | 2013-08-08 | 2013-08-08 | Safety type injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203507240U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103386158A (en) * | 2013-08-08 | 2013-11-13 | 江西洪达医疗器械集团有限公司 | Safety syringe |
| US11147959B1 (en) | 2021-03-31 | 2021-10-19 | Jason Lakis | Syringe apparatus for disinfection of central line port needleless connector and method of disinfecting a central line port needleless connector |
-
2013
- 2013-08-08 CN CN201320481643.3U patent/CN203507240U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103386158A (en) * | 2013-08-08 | 2013-11-13 | 江西洪达医疗器械集团有限公司 | Safety syringe |
| US11147959B1 (en) | 2021-03-31 | 2021-10-19 | Jason Lakis | Syringe apparatus for disinfection of central line port needleless connector and method of disinfecting a central line port needleless connector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140402 |