CN215585081U

CN215585081U - Syringe combination of easily assembling syringe needle seat

Info

Publication number: CN215585081U
Application number: CN202120518495.2U
Authority: CN
Inventors: 江瑞洋
Original assignee: Hubei Kelaide Medical Instrument Co Ltd
Current assignee: Hubei Kelaide Medical Instrument Co Ltd
Priority date: 2021-03-11
Filing date: 2021-03-11
Publication date: 2022-01-21
Anticipated expiration: 2031-03-11

Abstract

The utility model discloses a needle cylinder combination easy to assemble a needle head seat, and belongs to the technical field of syringe accessories. The syringe comprises a syringe body and a needle head seat arranged in the syringe body, wherein the syringe body is vertically arranged, a position limiting part is arranged on a convex shoulder of the syringe body along the vertical direction, and a propping part is arranged at the lower part of the needle head seat; the abutting part is of a tapered structure gradually enlarged from top to bottom; the limiting part is positioned at the outer side of the abutting part, the lower part of the inner side of the limiting part is inclined outwards from top to bottom to form a guiding conical surface, and the inner side of the convex shoulder is inclined inwards from bottom to top from the upper end of the inner side of the limiting part to form a abdicating conical surface matched with the abutting part; when the needle head seat is inserted into the top of the needle cylinder, the abutting part is embedded into the abdicating conical surface, and the limiting part can be bent inwards and abutted against the bottom of the needle head seat. The needle seat is easy to enter the needle cylinder, the yield is improved, and the assembly difficulty is reduced.

Description

Syringe combination of easily assembling syringe needle seat

Technical Field

The utility model belongs to the technical field of syringe accessories, and particularly relates to a syringe assembly easy for assembling a needle seat.

Background

Currently, syringes are the most commonly used, and are one of the largest volume medical devices used. In recent years, disposable sterile syringes have become popular for the control of iatrogenic infectious diseases and to avoid cross-contamination and other adverse effects. However, the existing disposable syringes have the defects of intact use, reusability, no safety device, exposed needle after injection and the like. On one hand, the disposable syringe is easy to be utilized by the heart molecules, and the disposable syringe which is discarded after being used is reused, so that the transmission and cross infection of viruses are easily caused; on the other hand, the needle after injection is still remained outside, which not only brings inconvenience to the carrying and destroying of the garbage in the injector relative to the sharpness degree of the needle, but also often happens that the needle tip is exposed to injure the user carelessly. Many countries have passed legislation that emphasizes the necessity of using safe self-destructive syringes.

The patent with application number CN201510039595.6 discloses a stop gear of needle head seat in retraction formula safety syringe, including setting up the spacing unit one that is used for restricting syringe needle seat rebound between cylinder and syringe needle seat and setting up the spacing unit two that is used for restricting syringe needle seat rebound between cylinder and syringe needle seat, the cylinder inside wall on have a convex shoulder, the convex shoulder downside has the spacing portion that stretches out downwards, spacing unit two including spacing portion and the stopper ring that is located the cylinder, the stopper ring on have and be annular expansion portion, the expansion portion be located between spacing portion and the cylinder lateral wall, the expansion portion supports and leans on the spacing portion, spacing portion inwards buckle and support and lean on the syringe needle seat, the expansion portion supports and leans on the cylinder inside wall, interference fit between spacing portion, expansion portion and the cylinder.

Referring to fig. 1-4, the existing syringe includes a vertically arranged syringe and a needle seat in the syringe, etc., a position-limiting part is arranged on a shoulder of the syringe along the vertical direction, a propping part is arranged on the lower part of the needle seat, the position-limiting part is a vertically arranged straight cylinder structure, and the propping part is a vertically arranged cylindrical structure (the upper part and the lower part have the same diameter). As shown in fig. 3 and 4, in the prior art, there are at least two kinds of scenes of wrong combination, and there are problems of collision caused by shaking of the needle head base and collision of the limiting portion caused by shaking of the needle head base, and further the limiting portion cannot be smoothly assembled or damaged, and finally the raw material loss and the assembly cost are increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, embodiments of the present invention provide a syringe assembly easy to assemble a needle base, and a guiding conical surface and a abdicating conical surface are added on the basis of the prior art, so that the needle base can easily enter the syringe, the yield is improved, and the assembly difficulty is reduced. The technical scheme is as follows:

the embodiment of the utility model provides a needle cylinder combination easy for assembling a needle head seat, which comprises a vertically arranged needle cylinder 1 and a needle head seat 2 in the needle cylinder 1, wherein a convex shoulder 3 of the needle cylinder 1 is provided with a limiting part 4 along the vertical direction, and the lower part of the needle head seat 2 is provided with an abutting part 5; the abutting part 5 is a conical structure gradually enlarged from top to bottom; the limiting part 4 is positioned on the outer side of the abutting part 5, the lower part of the inner side of the limiting part is inclined outwards from top to bottom to form a guiding conical surface 6, and the inner side of the convex shoulder 3 is inclined inwards from bottom to top from the upper end of the inner side of the limiting part 4 to form a abdicating conical surface 7 matched with the abutting part 5; when the needle head seat 2 is inserted into the top of the needle cylinder 1, the abutting part 5 is embedded into the abdicating conical surface 7, and the limiting part 4 can be bent inwards and abuts against the bottom of the needle head seat 2.

In the embodiment of the present invention, the upper portion of the inner side of the limiting portion 4 is vertically disposed, and the outer side thereof is obliquely disposed from top to bottom.

Specifically, the inclination angle of the guiding conical surface 6 in the embodiment of the utility model is 20-40 °, and the inclination angle of the abdicating conical surface 7 is 5-15 °.

Specifically, the inclination angle of the abutting part 5 in the embodiment of the utility model is the same as that of the abdicating conical surface 7, and the outer diameter of the abutting part is smaller than the inner diameter of the abdicating conical surface 7; the bottom of the needle head seat 2 is positioned above the upper end of the inner side of the limiting part 4.

The technical scheme provided by the embodiment of the utility model has the following beneficial effects: the embodiment of the utility model provides a syringe combination easy for assembling a needle seat, and the syringe combination is additionally provided with a guiding conical surface and a yielding conical surface on the basis of the prior art, so that the needle seat can easily enter the syringe, the yield is improved, and the assembling difficulty is reduced. Meanwhile, the yielding conical surface can also reduce the bending angle of the limiting part.

Drawings

FIG. 1 is a schematic structural view of a prior art syringe and a needle base before assembly;

FIG. 2 is a schematic view of an assembled syringe and needle holder of the prior art;

FIG. 3 is a schematic view of a prior art syringe and needle mount in an incorrect assembly;

FIG. 4 is a schematic view of another prior art misassembly of a barrel and needle mount;

FIG. 5 is a schematic structural view of a syringe assembly provided by an embodiment of the present invention for easy assembling of a needle base;

FIG. 6 is a schematic structural view of FIG. 5 when the needle base does not pass through the limiting portion;

FIG. 7 is a schematic structural view of the needle mount of FIG. 5 as it passes through the limiting portion;

FIG. 8 is a schematic view of the structure of a syringe provided in accordance with an embodiment of the present invention;

fig. 9 is a schematic structural view of a needle holder provided by an embodiment of the present invention.

In the figure: 1 syringe, 2 syringe needle seat, 3 shoulder, 4 spacing portion, 5 butt portions, 6 guide conical surfaces, 7 abdication conical surfaces.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 5-9, the embodiment of the present invention provides a syringe assembly easy to assemble a needle base, including a vertically arranged syringe 1 and a needle base 2 inside (at the top) the syringe 1, a shoulder 3 of the syringe 1 is provided with a limiting portion 4 along the vertical direction (to cooperate with a stop collar (part 3 in the prior art) to fix the needle base 2 at the top of the syringe 1), and the lower portion of the needle base 2 is provided with an abutting portion 5 (to cooperate with the inward bent limiting portion 4 to fix the needle base 2 at the top of the syringe 1). The structure is basically the same as that of the prior syringe, and the difference is that: the abutting portion 5 in this embodiment is a tapered structure (a truncated cone structure, the outer diameter of which is gradually enlarged from top to bottom, and the outer diameter of the bottom of which is larger than the outer diameter of the upper portion of the needle base 2) which is gradually enlarged from top to bottom. The limiting part 4 is located at the outer side (when coaxial) of the abutting part 5 to allow the needle cylinder 1 to pass through and the lower part of the inner side of the limiting part to be inclined outwards from top to bottom to form a guide conical surface 6 (the distance between the guide conical surface and the needle head seat 2 (when the guide conical surface passes through) is gradually increased from top to bottom to form a conical hole structure with a small top and a large bottom) so as to allow the needle head seat 2 to pass through, and the inner side of the shoulder 3 is inclined inwards from bottom to top to form a abdicating conical surface 7 (the inner diameter is gradually reduced from bottom to top to form a conical hole matched with the abutting part 5) so as to allow the needle head seat 2 to be inserted into the inner side of the limiting part 4. When the needle head seat 2 is inserted into the top of the needle cylinder 1, the leaning part 5 is embedded into the abdicating conical surface 7, and the limiting part 4 can be bent inwards and lean against the bottom of the needle head seat 2. In this patent, the abdicating conical surface 7 also has the effect that the combination of the needle head seat 2 and the needle cylinder 1 is more stable, and the limiting part 4 can fix the needle head seat 2 by bending inwards by a smaller angle relative to the prior art. Wherein, the stop collar in this embodiment is designed by matching with the limit part 4.

Referring to fig. 5-8, in the embodiment of the present invention, the upper portion of the inner side of the limiting portion 4 is vertically disposed, and the outer side thereof is obliquely disposed from top to bottom.

Specifically, the inclination angle of the guiding conical surface 6 in the embodiment of the utility model is 20-40 degrees, and the inclination angle of the abdicating conical surface 7 is 5-15 degrees.

Specifically, referring to fig. 5, the inclination angle of the abutting portion 5 in the embodiment of the present invention is the same as the inclination angle of the abdicating conical surface 7, and the outer diameter thereof is smaller (slightly smaller, for example, by 0.2 mm) than the inner diameter of the abdicating conical surface 7. The bottom of the needle head seat 2 is positioned above the upper end of the inner side of the limiting part 4.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A needle cylinder combination easy to assemble a needle head seat comprises a vertically arranged needle cylinder (1) and a needle head seat (2) in the needle cylinder (1), wherein a limiting part (4) is arranged on a convex shoulder (3) of the needle cylinder (1) along the vertical direction, and a leaning part (5) is arranged at the lower part of the needle head seat (2); the supporting part (5) is a tapered structure gradually enlarged from top to bottom; the limiting part (4) is positioned on the outer side of the abutting part (5), the lower part of the inner side of the limiting part is inclined outwards from top to bottom to form a guiding conical surface (6), and the inner side of the convex shoulder (3) is inclined inwards from bottom to top from the upper end of the inner side of the limiting part (4) to form a yielding conical surface (7) matched with the abutting part (5); when the needle head seat (2) is inserted into the top of the needle cylinder (1), the abutting part (5) is embedded into the abdicating conical surface (7), and the limiting part (4) can be bent inwards and abuts against the bottom of the needle head seat (2).

2. Needle cylinder combination easy to assemble needle holder according to claim 1, characterized in that the upper inside of the stop (4) is vertically arranged and the outside thereof is obliquely arranged from top to bottom.

3. Needle cylinder combination for easy assembly of a needle base according to claim 1, characterized in that the angle of inclination of the guiding cone (6) is 20-40 ° and the angle of inclination of the abdicating cone (7) is 5-15 °.

4. Needle cylinder combination easy to assemble needle holder according to claim 3, characterized in that the inclination of the abutment (5) is the same as the inclination of the abdicating cone (7), its outer diameter being smaller than the inner diameter of the abdicating cone (7); the bottom of the needle head seat (2) is positioned above the upper end of the inner side of the limiting part (4).