CN2605859Y

CN2605859Y - Self-destorying slide locking syringes

Info

Publication number: CN2605859Y
Application number: CNU032243480U
Authority: CN
Inventors: 武青峰; 伍南
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-03-12
Filing date: 2003-03-12
Publication date: 2004-03-10
Anticipated expiration: 2013-03-12
Also published as: WO2004080513A1; AU2003261575A1

Abstract

A sliding lock self-destruction syringe comprises an outer cover (1), a core rod (2), and a self-locking piece (3). The self-locking piece (3) has a barb (31) on one side; the part of the self-locking piece (3) that is below the barb (31) is bended as a prop foot (32); the core rod (2) is axially provided with a sliding chute (21) whose width is slightly larger than the thickness of the self-locking piece (3); at least a convex shoulder (211) is arranged on the internal side of the sliding chute (21). In assembly, the self-locking piece (3) is embedded in one end of the sliding chute (21), far from the pinhead; the barb (31) of the self-locking piece (3) extends from the sliding chute (21); the outer cover is nested outside the core rod (2) and the self-locking piece (3). Compared with the prior art, the utility model has the following advantages: the self-locking piece is of simple structure, easy manufacturing and assembly and low cost; the self-destruction function of the utility model is achieved by puncturing the outer cover, thus having practical significance for the fixed pinhead vaccine syringe.

Description

Sealed self-destruction syringe slides

Technical field this utility model relates to technical field of medical instruments, particularly relates to the sealed self-destruction syringe that slides.

Background technology self-destruction syringe of the prior art is for fear of self-desttruction equipment interlock self-destruction in advance in assembling and transportation mostly; need be provided with on the core bar protection bolt with fixing core bar with respect to the position of overcoat back cover; core bar can not be assembled at the end; causing taking out medicine has residual air in the syringe before, the sealed self-destruction syringe complex structure of such slip, use inconvenience.In order to overcome above-mentioned shortcoming, the Chinese patent 01258513 of the applicant's application has proposed a kind of easy to use, and can the system of puncturing makes the self-destruction syringe of standard component.Though above-mentioned self-destruction syringe has many advantages, but still there are complex structure, the more high weak point of cost.

The summary of the invention the technical problems to be solved in the utility model is to avoid above-mentioned the deficiencies in the prior art part and proposes a kind of structure and assemble the sealed self-destruction syringe of slip simple, that cost is low.

Technical problem to be solved in the utility model can be by solving by the following technical solutions:

Design, make the sealed self-destruction syringe of a kind of slips, comprise overcoat, core bar and from locking plate, on one side described have agnail from locking plate, described is the top foot from locking plate in the following position bending of described agnail; Described core bar has chute vertically, and the width of this chute is a bit larger tham the thickness from locking plate, and described chute inboard is provided with at least one convex shoulder; During assembling, describedly embed the end of described chute away from needle point from locking plate, described agnail from locking plate stretches out described chute.Described overcoat is enclosed within described core bar and outside locking plate.

This utility model compared with prior art has following technique effect:

1. self-locking chip architecture is simple, making, easy to assembly, with low cost;

2. its self-destroying function is to realize that by puncturing overcoat after overcoat punctured, syringe needle was scrapped thereupon, and avoiding syringe to reuse mainly is to avoid syringe needle to reuse, so the vaccine syringe for fixed needle has more practical significance;

3. describedly embed in the chute of chip, belong to concealed design, the not influence of outward appearance of syringe from locking plate.

Description of drawings

Fig. 1 is the slide overcoat sketch map of sealed self-destruction syringe of this utility model;

Fig. 2 is the core bar sketch map of described syringe;

Fig. 3 is the A-A profile of Fig. 2;

Fig. 4 is that the master from locking plate 3 of described syringe looks sketch map;

Fig. 5 is that sketch map is looked on the described right side from locking plate;

Fig. 6 is that described syringe assembles the front schematic view when finishing;

Fig. 7 is that described syringe assembles the side schematic view when finishing;

Fig. 8 is the sketch map of described syringe when taking out medicine and finishing;

Fig. 9 is the sketch map of described injector to inject when finishing.

The specific embodiment is described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing.

The sealed self-destruction syringe of a kind of slip, shown in Fig. 1 to 6, comprise overcoat 1, core bar 2 and from locking plate 3, Yi Bian described have agnail 31 from locking plate 3, describedly be top foot 32 in the 31 following positions bendings of described agnail, describedly make from locking plate 3 usefulness elastic sheet metals from locking plate 3.Described core bar 2 has chute 21 vertically, and the width of this chute 21 is a bit larger tham the thickness from locking plate 3, and described chute 21 inboards are provided with at least one convex shoulder 211.During assembling, described from the end of the described chute 21 of locking plate 3 embeddings away from needle point, described agnail 31 from locking plate 3 stretches out described chute 21.Described overcoat 1 is enclosed within described core bar 2 and outside locking plate 3.

Take out the moment of medicine, described core bar 2 relative overcoats 1 pull back, and as Fig. 6, shown in Figure 7, describedly thrust the inwall of described overcoat 1 from the agnail 31 of locking plate 3, drive described from chute 21 slides forwards of locking plate 3 at core bar 2.As shown in Figure 8, when taking out medicine and finish, the described front that slides into the convex shoulder 211 of described chute 21 from locking plate 3.

During injection, promote described core bar 2 and travel forward, the convex shoulders 211 in the described chute 21 withstand described from the top of locking plate 3 foot 32, drive describedly to travel forward together from locking plate 3.When injection finishes, as shown in Figure 9, the back cover 11 of the adjacent overcoat 1 of described core bar 2.At this moment, described overcoat 1 and core bar 2 be relative motion again, and this utility model syringe has been realized self-locking.When attempting to take out medicine once more, pull back core bar 2, the described inwall that thrusts overcoat 1 from the agnail 31 of locking plate 3, described top foot 32 is withstood by described convex shoulder 211, described core bar 2 overcoat 1 relatively moves backward and takes out and do not add medicine to, if pull back core bar 2 by force, thereby describedly will puncture overcoat 1 from locking plate 3 and make it to damage, core bar 2 may be damaged simultaneously.

In order to reduce described resistance when locking plate 3 slides in described chute 21, described 33 liang of angles, front portion from locking plate 3 all are certain circular arc chamfering.In order to adapt to multiple requirement of taking out dose, also can only take out half as both taking out to expire, a plurality of convex shoulders 211 can be set, each convex shoulder 211 uniform distribution in the chute 21 of this utility model setting; This purpose also can be controlled from the length of locking plate 3 by adjusting.

Claims

1. the sealed self-destruction syringe that slides comprises overcoat (1) and core bar (2), it is characterized in that:

Also comprise from locking plate (3), described from locking plate (3) one side agnail (31) arranged, describedly be top foot (32) in described agnail (31) following position bending from locking plate (3);

Described core bar (2) has chute (21) vertically, and the width of this chute (21) is a bit larger tham the thickness from locking plate (3), and described chute (21) is Yi Bian be provided with at least one convex shoulder (211);

During assembling, describedly embed the end of the chute (21) of described core bar (2) away from needle point from locking plate (3), described agnail from locking plate (3) (31) stretches out described chute (21), and described overcoat (1) is enclosed within described core bar (2) and outside locking plate (3).

2. the sealed self-destruction syringe of slip as claimed in claim 1 is characterized in that: described front portion from locking plate (3) is a circular arc chamfering for (33) two jiaos.

3. the sealed self-destruction syringe of slip as claimed in claim 1 or 2 is characterized in that: described convex shoulder (211) is one when above, each convex shoulder (211) uniform distribution.

4. the sealed self-destruction syringe of slip as claimed in claim 1 is characterized in that: describedly make with elastic sheet metal from locking plate (3).