CN2363724Y

CN2363724Y - Continuous syringe

Info

Publication number: CN2363724Y
Application number: CN 99206816
Authority: CN
Inventors: 曹孟君
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-03-31
Filing date: 1999-03-31
Publication date: 2000-02-16
Anticipated expiration: 2009-03-31

Abstract

The utility model provides a continuous syringe, which comprises a syringe 1, a three-way structure 2 and a physic liquor drawing tube 3, wherein, the first end 201 of the three-way structure 2 is suitable for being connected with a needle head, the second end 202 is suitable for being connected with the physic liquor drawing tube, and the third end 203 is suitable for being connected with the syringe; a first non-return valve 206 is arranged at the inner part of the first end 201 of the three-way structure 2, and the first non-return valve 206 allows physic liquor to flow from the syringe to the needle head in a single direction; a second non-return valve 212 is arranged at the inner part of the second end 202, the second non-return valve 212 allows the physic liquor to flow from the physic liquor drawing tube to the syringe in a single direction. By using the utility model, operators' labor intensity can be reduced, the injection time can be shortened, and injected persons' pain can be reduced.

Description

Continuous injector

This utility model relates to a kind of syringe, the especially a kind of syringe that can inject big medicine amount liquid continuously.

In medical practice, need a large amount of medicinal liquid of a shot sometimes.As in liposuction, need inject thousands of milliliters inflation fluid to the person's of undergoing surgery the zone of having an operation.If adopt 10 milliliters or 20 milliliters of syringes of prior art, just need to change the multiple injection device, all will extract former syringe needle and syringe at every turn, insert new syringe needle again and be full of the syringe of medicinal liquid, operating process is loaded down with trivial details and caused the person's of undergoing surgery misery.In the prior art, also the someone adopts a kind of continuous injector, the three-port structure of reversal valve is housed, the first termination syringe needle of three-port structure, the second termination medicine Liquid extracting tube, the 3rd termination syringe in increasing by one.Pull reversal valve, messenger drug Liquid extracting tube and syringe are connected, and can extract medicinal liquid, pull reversal valve again, and syringe needle and syringe are connected, and can inject.But, owing to need to operate by hand, use still very inconveniently to reversal valve, and prolonged inject time.

The purpose of this utility model is to overcome the deficiencies in the prior art part, and provides a kind of simple to operate, continuously the syringe of liquid medicine injection.

The purpose of this utility model is achieved in that a kind of continuous injector of structure, comprises syringe, three-port structure and medicine Liquid extracting tube, and first end of described three-port structure is suitable for connecing syringe needle, and second end is suitable for connecing the medicine Liquid extracting tube, and the 3rd end is suitable for connecing syringe.

Continuous injector of the present utility model is characterized in that, in first end of described three-port structure first non-return valve is housed, first non-return valve allow medicinal liquid from syringe to the syringe needle one-way flow; Second non-return valve is housed in second end, second non-return valve allow medicinal liquid from the medicine Liquid extracting tube to the syringe one-way flow.

Continuous injector of the present utility model is characterized in that, the fuse outside of described syringe is with a compression spring, and described compression spring is stuck between the fuse end and injector syringe end of syringe.

In use, take out at first continuously and press the syringe fuse, gas in the absolute removal system makes medicinal liquid be full of whole inner chamber; Push injection device fuse, pressure is transmitted to medicinal liquid, and when medicinal liquid pressure during greater than atmospheric pressure, medicinal liquid promotes second non-return valve, makes it to seal feeding opening, and simultaneously, medicinal liquid is washed first non-return valve open, and injecting by syringe needle must the injection site.After injecting liquid drug in the syringe is intact, unclamp the syringe fuse, because the effect of compression spring, the syringe fuse is ejected automatically, when medicinal liquid pressure during less than atmospheric pressure, first non-return valve is sealed the passage of first end of three-port structure, medicinal liquid can't enter syringe needle, and simultaneously, outside medicinal liquid is washed second non-return valve open, enter and be full of syringe, finish extraction medicinal liquid.

Implement continuous injector of the present utility model, control the flow direction of medicinal liquid by the non-return valve of three-port structure, only need the operating syringe fuse, just can realize continuous injection and Automatic Extraction to medicinal liquid, significantly reduced operator's labor intensity, also shorten inject time, reduced the misery of accepting the injector.

Below in conjunction with drawings and Examples, further specify the structure and the characteristics of continuous injector of the present utility model, in the accompanying drawing:

Fig. 1 is the sketch map of an embodiment of continuous injector of the present utility model;

Fig. 2 is the partial enlarged drawing of first non-return valve in the continuous injector shown in Figure 1;

Fig. 3 is that the A-A of first non-return valve shown in Figure 2 is to view;

Fig. 4 is the partial enlarged drawing of second non-return valve in the continuous injector shown in Figure 1;

Fig. 5 is that the B-B of second non-return valve shown in Figure 4 is to view.

As shown in Figure 1, in an embodiment of continuous injector of the present utility model, continuous injector comprises syringe 1, three-port structure 2 and medicine Liquid extracting tube 3, first end 201 of described three-port structure 2 is suitable for connecing syringe needle, second end 202 is suitable for connecing the medicine Liquid extracting tube, the 3rd end 203 is suitable for connecing syringe, generally is to connect 10 milliliters disposable syringe.Be provided with first valve cavity 205 of slightly larger in diameter on the medicine liquid channel 204 in first end 201 of described three-port structure 2 in medicine liquid channel 204 internal diameters, a cross valve plug 206 is housed, referring to figs. 2 and 3 more clearly understanding its construction features in first valve cavity 205.The cock cap 207 of described cross valve plug 206 front ends is stuck in first valve cavity 205, can seal medicine liquid channel 204, be with a little spring 209 outside the stopper rod 208 of cross valve plug 206, one end of described little spring 209 is stuck in the tailing edge of the cock cap 207 of cross valve plug, and the other end is stuck in first valve cavity 205.Be provided with second valve cavity 211 of slightly larger in diameter on the medicine liquid channel 210 in second end 202 of described three-port structure 2 in medicine liquid channel 210 internal diameters, a gaily decorated basket valve 212 is housed in second valve cavity 211, can more clearly understands its construction features with reference to figure 4 and Fig. 5.Gaily decorated basket valve 212 is stuck in second valve cavity 211, and the cock cap 213 of its front end can be sealed medicine liquid channel 210.Described cross valve plug 206 or gaily decorated basket valve 212 also can replace with the non-return valve of other types such as ball valve, but cross valve plug and gaily decorated basket valve have the advantage of good leak tightness.Described three-port structure 2 can use plastic material (PS) injection molded, and cross valve plug 206 or gaily decorated basket valve 212 can be made of elastomeric material, and little spring 209 needs to form through machined.

As shown in Figure 1, outside syringe fuse 101, be with a compression spring 102, described compression spring 102 is stuck between syringe fuse end 104 and the injector syringe end 105, the natural length of described compression spring 102 should guarantee that syringe fuse 101 is unlikely to eject in injector syringe 103, when shifting the top onto (as shown in Figure 1) as getting syringe fuse 104, the length between syringe fuse end 104 and the syringe end 105.

In use, take out at first continuously and press syringe fuse 104, gas in the absolute removal system makes medicinal liquid be full of whole inner chamber.Artificial push injection device fuse 104, compression spring 102 is compressed, and pressure is transmitted to medicinal liquid, and medicinal liquid promotes gaily decorated basket valve 212, makes it to seal feeding opening 210; Simultaneously, medicinal liquid promotes cross valve plug 206, compresses little spring 209, and cross valve plug 206 is released, and produces the space between the medicine liquid channel 204, so medicinal liquid injects the palpus injection site by syringe needle.After injecting liquid drug in the syringe is intact, unclamp syringe fuse 104, because the elastic force effect of compression spring 102, syringe fuse 104 is ejected, medicinal liquid pressure is less than atmospheric pressure, add the elastic force effect of little spring 209, the cock cap 207 of cross valve plug is tightly sealed the medicine liquid channel 204 of first end, and medicinal liquid can't enter syringe needle; Simultaneously, outside medicinal liquid is washed gaily decorated basket valve 212 open, enters and is full of syringe, finishes the extraction to medicinal liquid, thereby can begin to carry out next infusion cycles.

Claims

1, a kind of continuous injector, comprise syringe (1), three-port structure (2) and medicine Liquid extracting tube (3), first end (201) of described three-port structure (2) is suitable for connecing syringe needle, and second end (202) is suitable for connecing the medicine Liquid extracting tube, and the 3rd end (203) is suitable for connecing syringe; It is characterized in that, in first end (201) of described three-port structure (2) first non-return valve (206) is housed, first non-return valve (206) allow medicinal liquid from syringe to the syringe needle one-way flow; Second non-return valve (212) is housed in second end (202), second non-return valve (212) allow medicinal liquid from the medicine Liquid extracting tube to the syringe one-way flow.

2, continuous injector according to claim 1 is characterized in that, also comprises a compression spring (102), and described compression spring (102) is enclosed within outside the syringe fuse (101), is stuck between syringe fuse end (104) and the injector syringe end (105).

3, continuous injector according to claim 1 and 2 is characterized in that, described first non-return valve is cross valve plug (206); Be provided with first valve cavity (205) on the medicine liquid channel (204) in first end (201) of described three-port structure (2), described cross valve plug (206) is located in first valve cavity (205); The stopper rod (208) of described cross valve plug (206) is outer to be with a little spring (209), and an end of described little spring (209) is stuck in cock cap (207) tailing edge of cross valve plug, and the other end is stuck in first valve cavity (205).

4, continuous injector according to claim 1 and 2 is characterized in that, described second non-return valve is gaily decorated basket valve (212); Be provided with second valve cavity (211) on the medicine liquid channel (210) in second end (202) of described three-port structure (2), described gaily decorated basket valve (212) is located in second valve cavity (211).

5, continuous injector according to claim 1 and 2 is characterized in that, described three-port structure (2) adopts plastic material to make.

6, continuous injector according to claim 3 is characterized in that, described cross valve plug (206) adopts elastomeric material to make.

7, continuous injector according to claim 4 is characterized in that, described gaily decorated basket valve (212) adopts elastomeric material to make.