CN211068492U

CN211068492U - Disposable self-destruction syringe

Info

Publication number: CN211068492U
Application number: CN201921539094.4U
Authority: CN
Inventors: 徐伟; 徐爱萍
Original assignee: Changzhou Shuangma Medical Devices Co ltd
Current assignee: Changzhou Shuangma Medical Devices Co ltd
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-07-24
Anticipated expiration: 2029-09-16

Abstract

The utility model relates to the technical field of syringes, in particular to a disposable self-destruction syringe, which comprises a needle cylinder, a core rod, a piston and a needle head, wherein the piston is arranged in an injection cavity in a sliding way, a limit groove is sunken on the outer peripheral surface of the piston, a limit strip matched with the limit groove is protruded on the inner wall of the injection cavity, the limit strip is positioned in the limit groove, a cavity is arranged on the upper end surface of the piston downwards, the core rod is in threaded connection with the cavity of the piston, a channel with an upward opening is arranged in the core rod, and a conical tip part is arranged at the bottom end of the core rod. The injector is self-destroyed, the injector is prevented from being reused, and the injector has simple structure and convenient operation.

Description

Disposable self-destruction syringe

Technical Field

The utility model relates to the technical field of syringes, in particular to a disposable self-destruction syringe.

Background

The injector is a medical apparatus with wide application, and is used for subcutaneous injection, intramuscular injection, intravenous injection and the like, the structure of the traditional injector mainly comprises a needle cylinder, a piston, a core bar and a needle head, and when the injector is used, the liquid medicine in the needle cylinder is ejected from the needle head by pushing the core bar and utilizing the piston on the core bar; at present, the injector can be used continuously after being used once, and medical care personnel can easily pick up the used injector by lawbreakers for reuse after discarding the used injector once, so that cross infection is easy to occur, and particularly, the situations of spreading hepatitis and AIDS and the like can occur.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to solve the problem that the injector in the prior art is easy to be picked up by lawbreakers for reuse after being used and discarded, a disposable self-destruction injector is provided.

The utility model provides a technical scheme that its technical problem adopted is: a disposable self-destruction injector comprises a needle cylinder, a core rod, a piston and a needle head, wherein the needle head is fixed at the bottom end of the needle cylinder, an injection cavity with an upward opening is formed in the top end of the needle cylinder and communicated with the needle head, the piston is arranged in the injection cavity in a sliding mode, a limiting groove is formed in the outer peripheral face of the piston in a concave mode, a limiting strip matched with the limiting groove protrudes out of the inner wall of the injection cavity and is located in the limiting groove, a cavity is formed in the upper end face of the piston in a downward mode, a puncturing part is arranged between the cavity bottom of the cavity and the lower end face of the piston on the piston, the core rod is in threaded connection with the cavity of the piston, a channel with the upward opening is formed in the core rod and communicated with the cavity, and a conical tip portion is formed in the bottom end.

The cooperation of ingenious utilization spacing groove and spacing in this scheme makes piston circumference location in the injection chamber to combine core bar and piston threaded connection, can realize the fixed connection of piston and core bar on the one hand, on the other hand can be after the syringe uses, only need rotate the core bar, alright puncture the portion of punctureing on the piston by the toper point on the core bar to this is the syringe self-destruction, prevents that the syringe from by reuse, and simple structure, the simple operation.

Furthermore, an upper pressing ring and a lower pressing ring are respectively arranged at the upper end and the lower end of the piston, the upper pressing ring is in contact with the upper end face of the piston, a connecting ring extends downwards from the middle of the upper pressing ring, the outer peripheral surface of the connecting ring is in contact with the inner wall of the cavity, and the core rod is in threaded connection with the inner peripheral surface of the connecting ring;

lower clamping ring and the lower terminal surface contact of piston down, it has the connecting rod to push down to extend upwards, the connecting rod passes piston and last clamping ring in proper order, threaded connection has the nut on the connecting rod, the lower terminal surface of nut and the up end contact of last clamping ring, the hole of clamping ring and the portion of breaching of piston are just right down.

Furthermore, a through hole communicated with the channel is formed in the outer wall of the conical tip portion, and the through hole is communicated with the concave cavity.

The utility model has the advantages that: the utility model discloses ingenious utilization spacing groove of disposable self-destruction formula syringe and spacing cooperation make piston circumference location in the injection chamber to combine core bar and piston threaded connection, can realize the fixed connection of piston and core bar on the one hand, on the other hand can use the back at the syringe, only need rotate the core bar, alright puncture the portion of punctureing on with the piston by the toper point on the core bar, with this with the syringe self-destruction, prevent that the syringe from by reuse, and simple structure, the simple operation.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic view of the disposable self-destruction syringe of the present invention;

FIG. 2 is an enlarged partial schematic view of A of FIG. 1;

fig. 3 is a partially enlarged schematic view of B in fig. 1.

In the figure: 1. the injection device comprises a needle cylinder, 1-1 parts of an injection cavity, 1-11 parts of a limiting strip, 2 parts of a core rod, 2-1 parts of a channel, 2-2 parts of a conical tip part, 2-3 parts of a conducting hole, 3 parts of a piston, 3-1 parts of a limiting groove, 3-2 parts of a concave cavity, 3-3 parts of a puncturing part, 4 parts of a needle head, 5 parts of an upper pressing ring, 5-1 parts of a connecting ring, 6 parts of a lower pressing ring, 6-1 parts of a connecting rod, 6-2 parts of a nut, 6-3 parts of an inner hole.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings, which illustrate the basic structure of the invention only in a schematic way, and thus show only the components that are relevant to the invention, and the directions and references (e.g., upper, lower, left, right, etc.) may be used only to help describe the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.

Example 1

As shown in fig. 1-3, a disposable self-destruction injector comprises a needle cylinder 1, a core rod 2, a piston 3 and a needle 4, wherein the needle 4 is fixed at the bottom end of the needle cylinder 1, the top end of the needle cylinder 1 is provided with an injection cavity 1-1 with an upward opening, the injection cavity 1-1 is communicated with the needle 4, the piston 3 is slidably arranged in the injection cavity 1-1, the outer peripheral surface of the piston 3 is recessed with a limiting groove 3-1, the inner wall of the injection cavity 1-1 is protruded with a limiting strip 1-11 matched with the limiting groove 3-1, the limiting strip 1-11 is positioned in the limiting groove 3-1, the upper end surface of the piston 3 is provided with a concave cavity 3-2 downwards, the part of the piston 3 between the cavity bottom of the concave cavity 3-2 and the lower end surface of the piston 3 is a puncture part 3-3, the core rod 2 is in threaded connection with a cavity 3-2 of the piston 3, a channel 2-1 with an upward opening is formed in the core rod 2, the channel 2-1 is communicated with the cavity 3-2, and the bottom end of the core rod 2 is provided with a conical tip 2-2.

Furthermore, an upper pressing ring 5 and a lower pressing ring 6 are respectively arranged at the upper end and the lower end of the piston 3, the upper pressing ring 5 is in contact with the upper end face of the piston 3, a connecting ring 5-1 extends downwards from the middle of the upper pressing ring 5, the outer peripheral surface of the connecting ring 5-1 is in contact with the inner wall of the cavity 3-2, and the core rod 2 is in threaded connection with the inner peripheral surface of the connecting ring 5-1;

the lower compression ring 6 is in contact with the lower end face of the piston 3, a connecting rod 6-1 extends upwards from the lower compression ring 6, the connecting rod 6-1 sequentially penetrates through the piston 3 and the upper compression ring 5, a nut 6-2 is connected to the connecting rod 6-1 in a threaded manner, the lower end face of the nut 6-2 is in contact with the upper end face of the upper compression ring 5, and an inner hole 6-3 of the lower compression ring 6 is opposite to a puncture part 3-3 of the piston 3; when the nut 6-2 is screwed down, the piston 3 can be clamped tightly by the upper pressure ring 5 and the lower pressure ring 6, the strength of the piston 3 is improved, the piston is not easy to deform, the outer peripheral surface of the piston 3 can be arched outwards, so that reliable sealing is formed between the piston and the inner wall of the injection cavity 1-1, and the connecting ring 5-1 in the concave cavity 3-2 is in threaded connection with the core rod 2, so that the core rod 2 can move downwards to puncture the puncture part 3-3 of the piston 3 when the core rod 2 rotates.

The outer wall of the conical tip part 2-2 is provided with a through hole 2-3 communicated with the channel 2-1, and the through hole 2-3 is communicated with the concave cavity 3-2.

The working principle of the disposable self-destruction syringe of the embodiment is as follows:

the piston 3 can only do reciprocating motion along the axial direction under the matching of the limiting groove 3-1 and the limiting strip 1-11 in the injection cavity 1-1, so that when the core rod 2 is rotated, the piston 3 cannot rotate along with the core rod 2, after the injector is used, the core rod 2 can move downwards to the conical tip part 2-2 to puncture the weak puncture part 3-3 on the piston 3 by rotating the core rod 2, then the part of the injection cavity 1-1, which is positioned below the piston 3, can be communicated with the cavity 3-2 and is communicated with the outside through the through hole 2-3 and the channel 2-1 on the core rod 2, thereby realizing the self-destruction of the injector and effectively preventing the injector from being picked up and reused.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A disposable self-destruction syringe comprises a needle cylinder (1), a core rod (2), a piston (3) and a needle (4), wherein the needle (4) is fixed at the bottom end of the needle cylinder (1), the top end of the needle cylinder (1) is provided with an injection cavity (1-1) with an upward opening, the injection cavity (1-1) is communicated with the needle (4), and the disposable self-destruction syringe is characterized in that: the piston (3) is arranged in the injection cavity (1-1) in a sliding manner, a limiting groove (3-1) is recessed on the outer peripheral surface of the piston (3), a limiting strip (1-11) matched with the limiting groove (3-1) is protruded on the inner wall of the injection cavity (1-1), the limiting strip (1-11) is positioned in the limiting groove (3-1), a concave cavity (3-2) is formed in the upper end surface of the piston (3) in a downward manner, a piercing part (3-3) is arranged at a position between the bottom of the concave cavity (3-2) and the lower end surface of the piston (3) on the piston (3), the core rod (2) is in threaded connection with the concave cavity (3-2) of the piston (3), a channel (2-1) with an upward opening is formed in the core rod (2), and the channel (2-1) is communicated with the concave cavity (3-2), the bottom end of the core rod (2) is provided with a conical tip part (2-2).

2. The single use self-destructing syringe according to claim 1, characterized in that: an upper pressing ring (5) and a lower pressing ring (6) are respectively arranged at the upper end and the lower end of the piston (3), the upper pressing ring (5) is in contact with the upper end face of the piston (3), a connecting ring (5-1) extends downwards from the middle of the upper pressing ring (5), the outer peripheral face of the connecting ring (5-1) is in contact with the inner wall of the cavity (3-2), and the core rod (2) is in threaded connection with the inner peripheral face of the connecting ring (5-1);

lower terminal surface contact of clamping ring (6) and piston (3) down, clamping ring (6) upwards extend down has connecting rod (6-1), connecting rod (6-1) pass piston (3) and last clamping ring (5) in proper order, threaded connection has nut (6-2) on connecting rod (6-1), the lower terminal surface of nut (6-2) contacts with the up end of last clamping ring (5), hole (6-3) of clamping ring (6) and the portion (3-3) of punctureing of piston (3) are just right down.

3. The single use self-destructing syringe according to claim 1, characterized in that: the outer wall of the conical tip (2-2) is provided with a through hole (2-3) communicated with the channel (2-1), and the through hole (2-3) is communicated with the concave cavity (3-2).