CN214970375U - Injection device with self-destruction function - Google Patents
Injection device with self-destruction function Download PDFInfo
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- CN214970375U CN214970375U CN202120662177.3U CN202120662177U CN214970375U CN 214970375 U CN214970375 U CN 214970375U CN 202120662177 U CN202120662177 U CN 202120662177U CN 214970375 U CN214970375 U CN 214970375U
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- outer sleeve
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Abstract
The utility model relates to an injection device with self-destruction function belongs to aseptic medical instrument field. The injection needle comprises a core bar, wherein the core bar is sleeved with an outer sleeve, the end part of the core bar is provided with a piston, the injection needle penetrates through the bottom of the outer sleeve, and the bottom of an inner cavity of the outer sleeve is provided with a locking sealing mechanism; the locking sealing mechanism comprises a circular truncated cone, a positioning structure which is mutually matched with the bottom of the outer sleeve is arranged on the outer circumference of the circular truncated cone and the bottom of the outer sleeve, a sealing surface is arranged at the first end of the circular truncated cone in an outward inclined mode, a clamping groove is formed in the second end of the circular truncated cone in an inward contracting mode, an elastic buckle is arranged at the front end of the clamping groove, the circular truncated cone, the elastic buckle and the clamping groove are axially divided into at least 2 components, and a liquid passage is formed in the middle of each component; the bottom of the outer sleeve is provided with a sealing platform corresponding to the sealing surface, and a clamping platform corresponding to the elastic buckle. The utility model is simple in operation, the more safe and reliable of self-destruction function.
Description
Technical Field
The utility model relates to an injection device with self-destruction function belongs to aseptic medical instrument field.
Background
The invention relates to an injector with self-destruction function in the field of sterile medical instruments, which is widely used in China at present and can be repeatedly used after being used, cross infection is easy to generate, and the injector is newly designed to avoid the use condition from the source without additional action after injection, so that the injector can automatically realize the self-destruction function and prevent repeated use.
The existing common self-destruction syringes have complex structures and certain limitations on reliability. Utility patent CN2770678Y discloses an anchor piston syringe needle formula safety syringe that contracts, have syringe needle seat, syringe needle, push rod, overcoat, the syringe needle setting is on syringe needle seat top, syringe needle and syringe needle seat fixed connection, the push rod setting is in the overcoat, the push rod front end is provided with the arris recess, the overcoat head is equipped with the barrel neck, syringe needle seat sets up in the barrel neck, syringe needle seat outer lane is provided with protruding annular driving fit circle, syringe needle seat and barrel neck pass through protruding annular driving fit circle driving fit and are connected, syringe needle seat lower part is provided with the anchor head. The needle seat and the cylinder neck are closely connected through a convex ring-shaped sealing ring, and the needle seat and the cylinder neck are fixed only through the friction force of the convex ring-shaped sealing ring and the cylinder neck. If the friction force is too small, the needle head seat and the cylinder neck are easy to move; and the friction force is increased, the needle head seat is difficult to pull by using the anchor-shaped movable head, or the anchor-shaped movable head is broken so that the needle head cannot retract and is self-destructed.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: overcomes the defects of the prior art, provides an injection device with a self-destruction function, and has simple operation and safer and more reliable self-destruction function.
The utility model discloses an injection device with self-destruction function, which comprises a core bar, wherein the core bar is sleeved with an outer sleeve, the end part of the core bar is provided with a piston, an injection needle is arranged through the bottom of the outer sleeve, and the bottom of the inner cavity of the outer sleeve is provided with a locking sealing mechanism;
the locking sealing mechanism comprises a circular truncated cone, a positioning structure which is mutually matched with the bottom of the outer sleeve is arranged on the outer circumference of the circular truncated cone and the bottom of the outer sleeve, a sealing surface is arranged at the first end of the circular truncated cone in an outward inclined mode, a clamping groove is formed in the second end of the circular truncated cone in an inward contracting mode, an elastic buckle is arranged at the front end of the clamping groove, the circular truncated cone, the elastic buckle and the clamping groove are axially divided into at least 2 components, and a liquid passage is formed in the middle of each component;
the bottom of the outer sleeve is provided with a sealing platform corresponding to the sealing surface, and a clamping platform corresponding to the elastic buckle.
The working process or principle;
extracting liquid medicine: the plunger piston is formed by the core rod and the piston, the plunger piston moves backwards, liquid medicine is extracted under the action of negative pressure, passes through the injection needle and enters the liquid passage, the liquid passage is arranged at the middle position, the liquid medicine enters from the upper end, then flows between the sealing surface and the sealing platform, and finally flows out of the sealing surface and enters the outer sleeve.
Self-destruction: the plunger pushes the injection forward, then, the plunger promotes the antedisplacement of locking sealing mechanism, and elasticity buckle block ka tai, sealed face compresses tightly the sealing platform, and the liquid passage is sealed, and the liquid medicine can not pass through, realizes self-destruction. Through adopting sealed liquid path way to realize self-destruction, when the plunger suction, liquid path is blockked up unable suction, reaches the effect of product self-destruction, has solved the problem that protruding annular driving fit circle friction dynamics is difficult to control, and self-destruction function is safe and reliable more.
Preferably, the elastic buckle is provided with a first guide inclined plane from front to back.
Preferably, the rear end of the clamping table is provided with a second guide inclined surface corresponding to the elastic buckle.
Preferably, the split bodies are uniformly arranged around the central shaft of the circular truncated cone. When two groups of split bodies are arranged, the elastic buckles are of symmetrical structures.
Preferably, the positioning structure comprises positioning grooves formed in the circular truncated cone inwards, and positioning tables protruding outwards are correspondingly arranged on the outer sleeve 4, and the number of the positioning grooves is larger than that of the positioning tables by one group.
Preferably, the sealing surface is an annular sealing surface or a convex sealing surface.
Preferably, the locking and sealing mechanism is integrally injection molded.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a set up locking sealing mechanism in the overcoat, through setting up elasticity buckle, liquid passage and sealed face, the plunger is constituteed to core bar and piston, the plunger pushes away the bottom injection back that finishes, locking seal structure card bottom in the overcoat, the ka tai cooperation chucking of elasticity buckle and overcoat, the sealed platform cooperation laminating of sealed face and overcoat is sealed, unable normal suction, the self-destruction function starts, the problem that protruding annular driving fit circle friction dynamics is difficult to control has been solved, the self-destruction function is safe and reliable more.
2. The self-destruction is realized through the sealing liquid channel, when the core rod and the piston are sucked, the liquid channel is blocked and can not be sucked, the self-destruction effect of the product is achieved, and the self-destruction function is safer and more reliable.
3. The locking sealing mechanism is arranged in the inner cavity of the outer sleeve, is not influenced by acting force in other directions in the injection process, can move only when being acted by the pressure of the plunger, and pushes the locking sealing mechanism to be clamped into the bottom of the outer sleeve to realize self-destruction. No extra action is needed, and the self-destruction function is safe and reliable to use.
Drawings
FIG. 1: the structure diagram of the initial state of the embodiment of the utility model,
FIG. 2: the structure of the utility model is shown schematically in an embodiment of the utility model after the injection needle is removed in the liquid medicine sucking state,
FIG. 3: the structure of the self-destruction state of the utility model is shown schematically after the injection needle is removed,
FIG. 4: the schematic structure at a in figure 3 is shown,
FIG. 5: the locking and sealing mechanism has a schematic three-dimensional structure,
FIG. 6: a front view structure schematic diagram of the locking sealing mechanism,
FIG. 7: the left view structure schematic diagram of the locking sealing mechanism.
In the figure: 1. the injection needle 2, the locking and sealing mechanism 3, the piston 4, the outer sleeve 5 and the core rod;
2.1, an elastic buckle 2.2, a liquid passage 2.3, a clamping groove 2.4, a first positioning groove 2.5, a second positioning groove 2.6, a sealing surface 2.7, a first guide inclined surface 2.8, a circular truncated cone 2.9 and a split body;
4.1, a clamping table 4.2, a positioning table 4.3, a sealing table 4.4 and a second guide inclined plane.
Detailed Description
The technical solution in the embodiment of the present invention will be further clearly and completely described below with reference to the embodiment of the present invention and the accompanying drawings:
example 1
As shown in fig. 1 to 7, the injection device with self-destruction function of the present invention comprises a core bar 5, a sheath 4 is sleeved outside the core bar 5, a piston 3 is arranged at the end of the core bar 5, an injection needle 1 is arranged through the bottom of the sheath, and a locking sealing mechanism 2 is arranged at the bottom of the inner cavity of the sheath 4;
the locking sealing mechanism comprises a circular truncated cone 2.8, the bottom of the circular truncated cone 2.8 and the bottom of the outer sleeve 4 are provided with positioning structures which are matched with each other on the outer circumference, a sealing surface 2.6 is obliquely arranged at the first end of the circular truncated cone 2.8 outwards, a clamping groove 2.3 is arranged at the second end of the circular truncated cone 2.8 in a shrinking mode inwards, an elastic buckle 2.1 is arranged at the front end of the clamping groove 2.3, the circular truncated cone 2.8, the elastic buckle 2.1 and the clamping groove 2.3 are axially divided into at least 2 groups of parts 2.9, and a liquid passage 2.2 is formed in the middle of each part 2.9; the liquid passage is opened to the top end of the sealing surface. The split body 2.9 comprises a whole body consisting of a circular truncated cone 2.8, an elastic buckle 2.1 and a clamping groove 2.3, and the bottoms of the split bodies 2.9 are connected into a whole body through a sealing surface. The middle part of each body 2.9 is the liquid passage 2.2.
The bottom of the outer sleeve 4 is provided with a sealing platform 4.3 corresponding to the sealing surface 2.6, and a clamping platform 4.1 corresponding to the elastic buckle 2.1.
The elastic buckle 2.1 is provided with a first guide inclined plane 2.7 from the front to the back.
The back end of the clamping table 4.1 is provided with a second guide inclined surface 4.4 corresponding to the elastic buckle 2.1.
The split bodies 2.9 are uniformly arranged around the central shaft of the circular truncated cone 2.8.
The positioning structure comprises positioning grooves which are formed in the circular truncated cones 2.8 inwards, and positioning tables which are outwards protruded are correspondingly arranged on the outer sleeves 4, and the number of the positioning grooves is larger than that of the positioning tables by one group. Typically, the detents are provided in two sets, as shown in fig. 5, the detents comprising a first detent 2.4 and a second detent 2.5, and the detent table is provided in one set. The locking positioning mechanism is in an initial state, and the first positioning groove 2.4 and the positioning table 4.2 are matched to fix and lock the locking mechanism; the core rod and the piston push the locking sealing mechanism to move, liquid medicine is injected, when the liquid medicine is injected, the second positioning groove 2.5 of the locking sealing mechanism is matched and fixed with the positioning table to lock the locking sealing mechanism, the locking sealing mechanism cannot move, the sealing surface is matched and sealed with the sealing table, the liquid passage is sealed, the liquid medicine cannot be sucked, and self-destruction is realized. The specific quantity that sets up of constant head tank can set up according to actual demand.
The sealing surface 2.6 is an annular sealing surface or a convex sealing surface.
The locking and sealing mechanism is integrally formed by injection molding.
Working process or working principle:
when the product is in an initial state, the first positioning groove of the locking sealing mechanism is matched with the positioning table of the outer sleeve to be clamped and fixed, and the piston is arranged above the locking sealing mechanism but not contacted with the locking sealing mechanism.
Pumping liquid: the locking sealing mechanism realizes the positioning with the outer sleeve through the first positioning groove and the positioning table without influencing the normal use, and the liquid medicine enters from the conical head end, enters along the liquid passage of the locking sealing mechanism and flows out of the sealing surface to enter the outer sleeve.
The end of the outer sleeve connected with the injection needle is a conical head end.
Self-destruction: when the injection is finished soon, the piston contacts with the locking sealing mechanism firstly, when the piston pushes the bottom to finish the injection, the locking sealing mechanism is pushed by the thrust of the piston to move towards the inside, after the elastic buckle of the locking sealing mechanism is stressed, the two groups of elastic buckles contract inwards, the first guide inclined plane of the elastic buckle moves along the second guide inclined plane of the outer sleeve, until the elastic buckle crosses the clamping table, the elastic buckle clamps the clamping table to be fixed, at the moment, the second positioning groove and the positioning table are clamped and fixed, the sealing surface of the locking sealing mechanism is in sealing contact with the sealing table on the inner cavity surface of the outer sleeve, when liquid is sucked, the liquid cannot pass through, the injector cannot be reused, and the self-destruction function is realized.
The utility model discloses in to the direction of structure and the description of relative position relation, it is right not to constitute like the description from top to bottom all around the utility model discloses a restriction only is the description convenient.
Claims (7)
1. An injection device with a self-destruction function is characterized by comprising a core rod (5), wherein an outer sleeve (4) is sleeved outside the core rod (5), a piston (3) is arranged at the end part of the core rod (5), an injection needle (1) penetrates through the bottom of the outer sleeve, and a locking sealing mechanism (2) is arranged at the bottom of an inner cavity of the outer sleeve (4);
the locking sealing mechanism comprises a circular truncated cone (2.8), the bottoms of the circular truncated cone (2.8) and the outer sleeve (4) are provided with positioning structures which are matched with each other on the outer circumference, the first end of the circular truncated cone (2.8) is outwards obliquely provided with a sealing surface (2.6), the second end of the circular truncated cone (2.8) is inwards contracted to be provided with a clamping groove (2.3), the front end of the clamping groove (2.3) is provided with an elastic buckle (2.1), the circular truncated cone (2.8), the elastic buckle (2.1) and the clamping groove (2.3) are axially divided into at least 2 groups of components (2.9) to be arranged, and the middle part of the component (2.9) forms a liquid passage (2.2);
the bottom of the outer sleeve (4) is provided with a sealing platform (4.3) corresponding to the sealing surface (2.6), and a clamping platform (4.1) corresponding to the elastic buckle (2.1).
2. An injection device with self-destruction function according to claim 1, characterized in that the elastic catch (2.1) is provided with a first guiding bevel (2.7) from front to back.
3. The injection device with self-destruction function according to claim 2, characterized in that the rear end of the clamping platform (4.1) is provided with a second guiding bevel (4.4) corresponding to the elastic buckle (2.1).
4. The injection device with self-destruction function according to claim 1, wherein the split bodies (2.9) are uniformly arranged around the central axis of the circular truncated cone (2.8).
5. The injection device with the self-destruction function according to claim 1, wherein the positioning structure comprises positioning grooves formed in the circular truncated cone (2.8) and positioning platforms correspondingly provided with outward protrusions, and the number of the positioning grooves is one group greater than that of the positioning platforms.
6. Injection device with self-destruct function according to any of claims 1 to 5, characterized in that the sealing surface (2.6) is an annular sealing surface or a convex sealing surface.
7. The self-destruct injection device of claim 6, wherein the locking seal is integrally injection molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120662177.3U CN214970375U (en) | 2021-03-31 | 2021-03-31 | Injection device with self-destruction function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120662177.3U CN214970375U (en) | 2021-03-31 | 2021-03-31 | Injection device with self-destruction function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214970375U true CN214970375U (en) | 2021-12-03 |
Family
ID=79095808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120662177.3U Active CN214970375U (en) | 2021-03-31 | 2021-03-31 | Injection device with self-destruction function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214970375U (en) |
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2021
- 2021-03-31 CN CN202120662177.3U patent/CN214970375U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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| CP03 | Change of name, title or address |
Address after: 255086 No. 999, Zunxian Road, high tech Zone, Zibo City, Shandong Province Patentee after: Shandong ande medical supplies Co.,Ltd. Address before: No.77, North Road, development zone, high tech Zone, Zibo City, Shandong Province Patentee before: SHINVA ANDE HEALTHCARE APPARATUS Co.,Ltd. |