CN2636878Y

CN2636878Y - Automatic destroying type syringe

Info

Publication number: CN2636878Y
Application number: CN 03254409
Authority: CN
Inventors: 陈绍红
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-06-10
Filing date: 2003-06-10
Publication date: 2004-09-01
Anticipated expiration: 2013-06-10

Abstract

The utility model discloses a self-destructive syringe, which includes a needle tube, a propulsion axis and a rubber cap. The head part of the propulsion axis is designed to a cavity cylindrical body, and the end surface of the cavity cylindrical body is opened with a through hole. A connection pipe which is provided with a convex tray is designed in the inner cavity of the rubber cap, the convex tray end of the connection pipe is embedded in a groove of the inner cavity of the rubber cap, the end part of the pipe body of the connection pipe is inserted into the through hole of the cavity cylindrical body of the propulsion axis with the loose fit or transition fit. A fixed bolt which is provided with a flange is designed in the pipe cavity of the connection pipe, the flange end of the fixed bolt is embedded at the end part of the pipe body of the connection pipe with the interference fit, so as to expand the end part of the pipe body of the connection pipe to firmly connect with the through hole of the cavity cylindrical body of the propulsion axis into a whole body. The end part of the rod body of the fixed bolt is protrusive out of the convex tray end of the connection pipe. The utility model has simple structure and low cost. The syringe can lose the function of re-use without other tools and operations after being used for one time, thus, the utility model is convenient to be used and the destruct is complete, which can save a great deal of manpower and material resources.

Description

Automatically ruin the type syringe

Technical field

This utility model relates to medical instruments syringe commonly used, refers to a kind of type syringe of ruining automatically particularly.

Background technology

Syringe is that hospital is the indispensable medical apparatus of treatment operations such as patient infusion, blood drawing, drawing liquid.At present, most hospitals are widely used to be disposable syringe, be patient infusion once after, this syringe has just abandoned.Can prevent with the syringe to be the medium cross infection like this, avoid spreading and propagating of disease.But minority medical institutions and private clinic be only from self economic interests, with used syringe again row come into operation, serious harm patient's body health.In order to stop this type of malfeasant generation, people often use the back that it is destroyed at syringe, but existing artificial destroying method and machine are destroyed mode the type of ruining device structure complexity is arranged all, destroy inconvenience, not thorough, human and material resources is wasted defectives such as big.

Summary of the invention

The purpose of this utility model to provide exactly a kind of simple in structure, easy to use, with low cost, ruin type and ruin the type syringe completely automatically.

For realizing this purpose, this utility model is designed ruins the type syringe automatically, comprises needle tubing, is installed in cardan shaft in the needle lumen and the rubber cap that is installed in the cardan shaft head.The head design of cardan shaft is a cavity cylinder, and the cylindrical end face of cavity has a through hole.Design has the connection tube with protruding dish in the inner chamber of rubber cap, and the protruding dish end of connection tube is nested in the lumen channels of rubber cap, and the body end of connection tube is inserted in the cavity cylinder through hole of cardan shaft, is loose fit or interference fits with it.In the tube chamber of connection tube also design one flanged gim peg is arranged, the flange end embedding of gim peg is pressed in the body end of connection tube, is interference fit with it, thereby is expanded in the body end of connection tube and firmly be connected as a single entity with the cavity cylinder through hole of cardan shaft.The body of rod end nipple of gim peg is for the protruding dish end of connection tube.Its operation principle is such: take out medicine or drawing liquid when mobile backward when cardan shaft, because the squeezing action of gim peg flange end fits tightly in the cavity cylinder through hole of cardan shaft connection tube body end, cardan shaft can not disconnect with rubber cap; And when the cardan shaft injection moves forward to the syringe intracavity end, because being compressed axially in advance, gim peg body of rod end moves backward with respect to connection tube, make the gim peg flange end deviate from connection tube, radial pressure between the cavity cylinder through hole of connection tube body end and cardan shaft disappears, rubber cap and cardan shaft disconnect and stay syringe tip, syringe function forfeiture.

Advantage of the present utility model is: the designed type syringe of ruining is automatically compared with existing disposable syringe, its member and profile are constant substantially, just increased and ruined type assembly connection tube and gim peg between rubber cap and the cardan shaft, it is simple in structure, with low cost.And after once using, need not other instruments and operation, syringe has just lost the function that re-uses, and is easy to use, and it is thorough to ruin type, can save a large amount of manpower and materials.

Description of drawings

Fig. 1 is a kind of structural representation of ruining the type syringe automatically;

Fig. 2 ruins the type principle schematic for syringe shown in Figure 1;

Fig. 3 is the structural representation behind the type of ruining of syringe shown in Figure 1.

The specific embodiment

Below in conjunction with accompanying drawing a kind of specific embodiment of the present utility model is described in further detail:

Automatically ruin the type syringe shown in the figure, have a needle tubing 2, be provided with cardan shaft 3 in needle tubing 2 intracavity, cardan shaft 3 heads are provided with rubber cap 1.The head of cardan shaft 3 is a cavity cylinder, and the cylindrical end face of this cavity has a through hole.Be provided with a connection tube 4 with protruding dish in the inner chamber of rubber cap 1, the protruding dish end of connection tube 4 is nested in the lumen channels of rubber cap 1; The body end of connection tube 4 is inserted in the cavity cylinder through hole of cardan shaft 3, and its body outer end diameter is consistent with through-hole diameter, is loose fit or interference fits.Also be provided with a flanged gim peg 5 in the tube chamber of connection tube 4, the flange end embedding of gim peg 5 is pressed in the body end of connection tube 4, and the flange end diameter of gim peg 5 is the interference fit of appropriateness than the big 0.5～1mm of body inner end diameter of connection tube 4 with it.The body of rod end nipple of gim peg 5 is for the protruding dish end 3～5mm of connection tube 4.Thereby expand in the body end that both can make connection tube 4 with the cavity cylinder through hole close and firm of cardan shaft 3 be connected as a single entity, gim peg 5 is easily deviate from from the body end of connection tube 4 under the effect of axial compression power, cause rubber cap 1 and cardan shaft 3 to separate, reach the purpose that syringe is ruined type automatically.An end that matches with rubber cap 1 conical surface in above-mentioned needle tubing 2 inner chambers can design and be planar shaped, and the body of rod end that can guarantee gim peg 5 so always touches needle tubing 2 inner chamber end planes in advance and moves backward, and it is effective to guarantee that used syringe is ruined type.

When this utility model uses, with cardan shaft 3 pumpback backward, make needle tubing 2 inner chambers be full of medicinal liquid, this moment, rubber cap 1 was connected as a single entity with cardan shaft 3 under the effect of connection tube 4 and gim peg 5, can not separate; And when cardan shaft 3 moves forward to needle tubing 2 inner chamber end planes, this end plane reacts on gim peg 5 across rubber cap 1, it is moved backward and disengaging connection tube 4, become loose fit or interference fits between the cavity cylinder through hole of connection tube 4 and cardan shaft 3 at this moment, lose the effect of being connected and fixed; With cardan shaft 3 backward during pumpback, rubber cap 1 disconnects with cardan shaft 3 under the effect of needle tubing 2 inwall frictional force, stays in the needle tubing 2 once more, and syringe is ruined type automatically.

Claims

1. ruin the type syringe automatically for one kind, the rubber cap (1) that comprises needle tubing (2), is installed in the cardan shaft (3) of needle tubing (2) intracavity and is installed in cardan shaft (3) head, it is characterized in that: the head of cardan shaft (3) is a cavity cylinder, and the cylindrical end face of cavity has a through hole; Be provided with a connection tube with protruding dish (4) in the inner chamber of rubber cap (1), the protruding dish end of connection tube (4) is nested in the lumen channels of rubber cap (1), the body end of connection tube (4) is inserted in the cavity cylinder through hole of cardan shaft (3), is loose fit or interference fits with it; Also be provided with a flanged gim peg (5) in the tube chamber of connection tube (4), the flange end embedding of gim peg (5) is pressed in the body end of connection tube (4), be interference fit with it, cavity cylinder through hole thereby expand in the body end that makes connection tube (4) with cardan shaft (3) firmly is connected as a single entity, and the body of rod end nipple of gim peg (5) is for the protruding dish end of connection tube (4).

2. the type syringe of ruining automatically according to claim 1 is characterized in that: an end that matches with rubber cap (1) conical surface in said needle tubing (2) inner chamber is planar shaped.

3. the type syringe of ruining automatically according to claim 1 and 2, it is characterized in that: the flange end diameter of said gim peg (5) is than the big 0.5～1mm of body inner end diameter of connection tube (4), and the body of rod end nipple of gim peg (5) is for the protruding dish end 3～5mm of connection tube (4).