CN103285465A - Core rod structure for pullback-type safe self-destructive syringe - Google Patents
Core rod structure for pullback-type safe self-destructive syringe Download PDFInfo
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- CN103285465A CN103285465A CN2012100496277A CN201210049627A CN103285465A CN 103285465 A CN103285465 A CN 103285465A CN 2012100496277 A CN2012100496277 A CN 2012100496277A CN 201210049627 A CN201210049627 A CN 201210049627A CN 103285465 A CN103285465 A CN 103285465A
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- core bar
- folding arm
- type safety
- bar structure
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Abstract
The invention discloses a core rod structure for a pullback-type safe self-destructive syringe. An asymmetrical elastic locking and pullback component is arranged on the end part of a rod body, wherein the pullback component takes a symmetrical central line of a core rod as a central axis; a clamping and locking part is arranged on each of the two sides of the central axis; and the clamping and locking parts on the two sides are asymmetrical. One or both of the clamping and locking parts are elastic, an elastic function ensures that the clamping and locking parts can be smoothly inserted into the inner cavity of a needle seat, and through elastic expansion force, asymmetrical clamping parts on the two sides can be clamped and locked with the clamping and locking parts in the inner cavity of the needle seat; and after the needle seat is pulled back into a syringe cylinder, in a stressing environment of an asymmetric force, the needle seat can automatically deflect towards one side, and an injection needle falls towards one side of the inner wall of the cylinder in the nearly 45-degree angle direction and is locked by the neck part of the cylinder, so that the injection needle and the needle seat cannot be pushed out of the neck part of the cylinder again, secondary damage or cross infection caused by pushing a needle head out of the cylinder again after use is effectively prevented.
Description
Technical field
The present invention relates to technical field of medical, specifically a kind of core bar structure for the haulback type safety self-destructing syringe, particularly its mechanical connecting structure.
Background technology
Documents one, the patent No.: ZL200710047077.4, the applying date: 2007.10.16, notification number: CN101411908, 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 described core bar end is provided with horizontal cut, vertical breach at horizontal cut and body of rod place, core bar end links, horizontal cut matches with vertical breach, 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, 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, the core bar body of rod herein has certain elasticity, 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 herein, horizontal cut can be high outside and low outside shape, it is circular-arc that the core bar end becomes, last needle stand becomes bar shape, last needle stand outer wall epimere is provided with the reinforcement fin, last needle stand outer wall hypomere is provided with fixedly bulge loop of needle stand, last needle stand fixedly the overall diameter of bulge loop greater than last needle stand outer diameter 0.05mm-0.3mm, described 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 following needle holder annular fixed groove upper chamber 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, the tube neck inwall place of described cylindrical shell is provided with a neck upper limit ring and tube neck lower limit ring respectively, distance between tube 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, the spacing muscle of cylindrical shell can be linear annular muscle, many the annular muscle that perpendicular muscle constitutes,, a perpendicular muscle, the annular muscle that a plurality of raised points constitute, 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 the 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.
Documents two, the patent No.: ZL200720067715.4, the applying date: 2007.03.08, notification number: CN201076648, patentee: Shanghai DingJianTang biochemistry Science Co., Ltd, this case discloses " a kind of core bar that has the Metallic hook structure ", comprise the core bar body, the upper end of core bar body is provided with the column fastener, and column fastener place is socketed with plug, it is characterized in that: described plug place is provided with installing hole, is provided with barbed body in the installing hole.
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 released again causes user by the risk of secondary damage.
In sum, still need the core bar structure of existing barb haulback type syringe is further improved, 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 object of the present invention is to provide a kind of core bar structure for the haulback type safety self-destructing syringe, its body of rod end is provided with the asymmetric locking piece of band spring function, this locking piece can lock by engaging mode mutually with the syringe needle inner chamber, and, after needle stand is pulled back to the injector cartridge, under the 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 again thus, prevent that effectively syringe needle is pushed out the secondary damage that causes, realize the safety self-destruct operation of syringe, overcome the shortcoming and defect that exists in the prior art.
To achieve these goals, technical scheme of the present invention is: a kind of core bar structure for the haulback type safety self-destructing syringe, it comprises the body of rod, the body of rod forms the spacing department of assembly of plug near the place, end, place, the spacing department of assembly of plug is socketed with plug, it is characterized in that: described body of rod end is provided with the asymmetric elastic locking part of pulling back.
The invention discloses a kind of core bar structure for the haulback type safety self-destructing syringe, the end of this core bar is provided with the asymmetric locking piece of pulling back of band spring function.Cooperate the spring function design with unsymmetric structure, guarantee that this locking piece can insert the needle stand inner chamber smoothly, and utilize the effect of elastic dilatation power, the interior cavity wall holding section of realization asymmetric holding section, both sides and needle stand engages and locks.After needle stand is pulled back to the injector cartridge, being subjected under the force environment of asymmetric active force, needle stand can form deflection from trend one side, 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 again thus, prevent that effectively syringe needle is pushed out the secondary damage that causes, really realize the safety self-destruct operation of syringe.When the present invention specifically implements, 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, use specific angle and size design, make the barb body possess the elastic buffer lock function, in addition, pull back locking piece and core bar of above-mentioned asymmetric elasticity is into a single integrated structure, global facility adopts a die sinking molding, need not processing or follow-up assembling separately, effectively reduce manufacturing cost, simplified assembly technology, 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 structural representation of the present invention.
Fig. 2 is plastics barbed body structural representation of the present invention.
Fig. 3 is Fig. 2 vertical view.
Fig. 4 is Fig. 2 side view.
Fig. 5 is user mode figure of the present invention.
The specific embodiment
With reference to the accompanying drawings, the present invention further is described.
The present invention is a kind of core bar structure for the haulback type safety self-destructing syringe, it comprises the body of rod 1, the body of rod 1 forms the spacing department of assembly 2 of plug near the place, end, 2 places, the spacing department of assembly of plug are socketed with plug 16, and it is different from prior art and is: the described body of rod 1 end is provided with the asymmetric elastic locking part of pulling back.This asymmetric elastic locking part of pulling back is axis with the symmetrical center line of core bar, and the both sides of its axis respectively form a snap-in lock bonding part, and the snap-in lock bonding part of both sides is asymmetric shape.Simultaneously, the snap-in lock bonding part of one or both sides has elastic construction, can enter the syringe needle inner chamber smoothly to guarantee this locking part of pulling back, and tight snap lock with it.
In the specific implementation, a described side snap-in lock bonding part is higher or lower than opposite side snap-in lock bonding part.The width of a described side snap-in lock bonding part is greater than or less than opposite side snap-in lock bonding part, and thus, the snap-in lock bonding part of both sides is asymmetric shape and distributes.
In the specific implementation, the distance between the symmetrical center line of the snap-in lock bonding part outer ledge of a described side and the body of rod is 1mm-20mm.
In the specific embodiment of the invention, the described asymmetric elastic locking part of pulling back is a barbed body 3, described barbed body 3 is plastic material, and it is into a single integrated structure with the body of rod 1, a die sinking molding, the overall stability of the unified performance boost core bar of material, integral structure can reduce manufacturing cost, improves and produces and efficiency of assembling.
In concrete another embodiment of the present invention, the described asymmetric elastic locking part of pulling back is a barbed body 3, and described barbed body 3 is plastic material, and with 1 one-tenth split type assembly structure of the body of rod.
In the specific implementation, described barbed body lower end forms base portion 4, first folding arm 5 that changes to a lateral deviation is formed at base portion 4 tops, the lateral wall, junction of first folding arm 5 and base portion 4 forms arc chord angle 8 or the knuckle of inner concavity, the radian of this arc chord angle 8 is that 45 degree are to 179 degree, the lower end of first folding arm 5 is connected with the upper end of base portion 4, the upper end of first folding arm 5 is connected with second folding arm, 6 one ends, second folding arm, 6 other ends are unsettled, the outside of first folding arm 5 and second folding arm, 6 junctions forms arc surface 7, the inboard of first folding arm 5 and second folding arm, 6 junctions forms the interior angle 11 of 2 degree-90 degree, the width that forms opening between the free end of second folding arm 6 and first folding arm 5 is 0.5mm-40mm, this width can guarantee to form between first folding arm and second folding arm elastic telescopic performance, barbed body is exactly to change to take advantage of a situation by the elasticity of angle between first folding arm and second folding arm to slip into the needle stand inner chamber, and under the effect of the expansionary force that resets with the tight snap lock of needle stand inner chamber.The length of described first folding arm 5 is 0.5mm-50mm, and the length of described second folding arm 6 is 0.5mm-60mm.The free end of described second folding arm 6 forms thorn point 15, and the free end of second folding arm 6 protrudes from base portion 4 outer ledges.
In the specific implementation, the described body of rod 1 place forms the reinforcement 12 that four angles such as cross distribute, and reinforcement 12 outer edge are provided with spacing tabs 13.Be connected by at least two contacts 14 between described spacing tabs 13 and the reinforcement 12.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention does, can not assert that the present invention is concrete to implement to be confined to above-mentioned these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (16)
1. core bar structure that is used for the haulback type safety self-destructing syringe, it comprises the body of rod (1), the body of rod (1) forms the spacing department of assembly of plug (2) near the place, end, the spacing department of assembly of plug (2) locates to be socketed with plug (16), it is characterized in that: the described body of rod (1) end is provided with the asymmetric elastic locking part of pulling back.
2. a kind of core bar structure for the haulback type safety self-destructing syringe according to claim 1, it is characterized in that: the described asymmetric elastic locking part of pulling back is axis with the symmetrical center line of core bar, the both sides of its axis respectively form a snap-in lock bonding part, and the snap-in lock bonding part of both sides is asymmetric shape.
3. a kind of core bar structure for the haulback type safety self-destructing syringe according to claim 2, it is characterized in that: a described side snap-in lock bonding part is higher or lower than opposite side snap-in lock bonding part.
4. a kind of core bar structure for the haulback type safety self-destructing syringe according to claim 2, it is characterized in that: the width of a described side snap-in lock bonding part is greater than or less than opposite side snap-in lock bonding part.
5. a kind of core bar structure for the haulback type safety self-destructing syringe according to claim 2, it is characterized in that: the snap-in lock bonding part of described one or both sides has elastic construction.
6. a kind of core bar structure for the haulback type safety self-destructing syringe according to claim 1, it is characterized in that: the distance between the snap-in lock bonding part outer ledge of a described side and the symmetrical center line of the body of rod is 1mm-20mm.
7. a kind of core bar structure for the haulback type safety self-destructing syringe according to claim 1, it is characterized in that: the described asymmetric elastic locking part of pulling back is a barbed body (3), described barbed body (3) is plastic material, and into a single integrated structure with the body of rod (1), a die sinking molding.
8. a kind of core bar structure for the haulback type safety self-destructing syringe according to claim 1, it is characterized in that: the described asymmetric elastic locking part of pulling back is a barbed body, described barbed body is plastic material, and becomes split type assembly structure with the body of rod (1).
9. a kind of core bar structure for the haulback type safety self-destructing syringe according to claim 7 is characterized in that: described barbed body lower end formation base portion (4).
10. a kind of core bar structure for the haulback type safety self-destructing syringe according to claim 9, it is characterized in that: first folding arm (5) that changes to a lateral deviation is formed at described base portion (4) top, the lateral wall, junction of first folding arm (5) and base portion (4) forms arc chord angle (8) or the knuckle of inner concavity, the radian of this arc chord angle 8 is that 45 degree are to 179 degree, the lower end of first folding arm (5) is connected with the upper end of base portion (4), the upper end of first folding arm (5) is connected with second folding arm (6) one ends, second folding arm (6) other end is unsettled, first folding arm (5) forms arc surface (7) with the outside of second folding arm (6) junction, first folding arm (5) forms 2 degree to the interior angle (11) of 90 degree with the inboard of second folding arm (6) junction, and the width that forms opening between the free end of second folding arm (6) and first folding arm (5) is 0.5mm-40mm.
11. a kind of core bar structure for the haulback type safety self-destructing syringe according to claim 10 is characterized in that: the length of described first folding arm (5) is 0.5mm-50mm.
12. a kind of core bar structure for the haulback type safety self-destructing syringe according to claim 10 is characterized in that: the length of described second folding arm (6) is 0.5mm-60mm.
13. a kind of core bar structure for the haulback type safety self-destructing syringe according to claim 1, it is characterized in that: the described body of rod (1) is located to form the reinforcement (12) that four angles such as cross distribute, and reinforcement (12) outer edge is provided with spacing tabs (13).
14. a kind of core bar structure for the haulback type safety self-destructing syringe according to claim 13 is characterized in that: be connected by at least two contacts (14) between described spacing tabs (13) and the reinforcement (12).
15. a kind of core bar structure for the haulback type safety self-destructing syringe according to claim 10 is characterized in that: the free end of described second folding arm (6) forms thorn point (15).
16. a kind of core bar structure for the haulback type safety self-destructing syringe according to claim 10 is characterized in that: the free end of described second folding arm (6) protrudes from base portion (4) outer ledge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100496277A CN103285465A (en) | 2012-02-29 | 2012-02-29 | Core rod structure for pullback-type safe self-destructive syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100496277A CN103285465A (en) | 2012-02-29 | 2012-02-29 | Core rod structure for pullback-type safe self-destructive syringe |
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| Publication Number | Publication Date |
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| CN103285465A true CN103285465A (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100496277A Pending CN103285465A (en) | 2012-02-29 | 2012-02-29 | Core rod structure for pullback-type safe self-destructive syringe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106955399A (en) * | 2016-01-08 | 2017-07-18 | 吕文进 | Safety injector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201061649Y (en) * | 2007-07-10 | 2008-05-21 | 沈海忠 | Core lever for disposal safety type syringe |
| CN101428162A (en) * | 2008-12-09 | 2009-05-13 | 宣庆弟 | Disposable syringe |
| CN202105275U (en) * | 2011-06-07 | 2012-01-11 | 倍安德普医疗科技（上海）有限公司 | Safe self-destruction syringe |
| CN202105269U (en) * | 2011-06-07 | 2012-01-11 | 倍安德普医疗科技（上海）有限公司 | Inner needle base structure for safe self-destruction syringe |
-
2012
- 2012-02-29 CN CN2012100496277A patent/CN103285465A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201061649Y (en) * | 2007-07-10 | 2008-05-21 | 沈海忠 | Core lever for disposal safety type syringe |
| CN101428162A (en) * | 2008-12-09 | 2009-05-13 | 宣庆弟 | Disposable syringe |
| CN202105275U (en) * | 2011-06-07 | 2012-01-11 | 倍安德普医疗科技（上海）有限公司 | Safe self-destruction syringe |
| CN202105269U (en) * | 2011-06-07 | 2012-01-11 | 倍安德普医疗科技（上海）有限公司 | Inner needle base structure for safe self-destruction syringe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106955399A (en) * | 2016-01-08 | 2017-07-18 | 吕文进 | Safety injector |
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Application publication date: 20130911 |
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