CN202191298U

CN202191298U - Sample injection needle capable of preventing stabbing seal gasket

Info

Publication number: CN202191298U
Application number: CN201120304126XU
Authority: CN
Inventors: 宋涛; 戴文东; 李志才; 邓东卫; 赵建平; 陈琦
Original assignee: SHANGHAI HUIZHONG MEDICAL TECHNOLOGY Co Ltd
Current assignee: Shanghai Huachen Biological Reagent Co., Ltd.
Priority date: 2011-08-19
Filing date: 2011-08-19
Publication date: 2012-04-18
Anticipated expiration: 2021-08-19

Abstract

A sample injection needle capable of preventing stabbing a seal gasket comprises a main needle and an auxiliary needle, the inner diameter of the main needle is substantially the same as the outer diameter of the auxiliary needle, the main needle and the auxiliary needle are welded or adhered together at a tip of the sample injection needle, the bottom of the main needle is completely or substantially level to that of the auxiliary needle, a rounded corner is arranged at the tip of the main needle, and the radius of the rounded corner is slightly smaller than or equal to the wall thickness of the main needle preferentially. The proper rounded corner is arranged at the tip of the sample injection needle, so that the original sharper tip is smoothened, the sample injection needle is prevented from stabbing the seal gasket when lifted up, the service life of the seal gasket is prolonged, and operating efficiency of instruments is improved.

Description

A kind of sample introduction needle that prevents to stab sealing gasket

Technical field

This utility model relates to the sample introduction needle that the medical field blood gas analyzer uses.

Background technology

In blood gas analyzer, when needs are measured sample, sample introduction needle is lifted through programme-control, as shown in Figure 1, among the figure, sample introduction needle 1, sealing gasket 2, sealing shroud 3, sample introduction needle guard 4, sealing ring 5 and sealing ring 6.This moment, sample introduction needle 1 passed sealing gasket 2.Sample gets into blood gas analyzer from sample introduction needle, and after sample introduction was accomplished, sample introduction needle was regained as shown in Figure 2, became the part of blood gas analyzer internal duct.

When sample introduction needle passes sealing gasket because sample introduction needle pin mouth is comparatively sharp, as shown in Figure 3, stab sealing gasket easily, cause sample introduction needle to be regained after, internal duct gas leakage influences the operate as normal of instrument.

Summary of the invention

This utility model is exactly in order to overcome the deficiency of above-mentioned prior art, provides a kind of simple in structure and can prevent to stab the sample introduction needle of sealing gasket.

It is a kind of simple in structure and can prevent to stab the sample introduction needle of sealing gasket that this utility model provides; Comprise the auxilliary pin 8 of sample introduction needle master pin 7 and sample introduction needle; The external diameter size of the auxilliary pin of the internal diameter of said sample introduction needle master's pin and sample introduction needle is basic identical, at sample introduction needle pin mouth place with two pins through welding or bond together, sample introduction needle master's pin is concordant or concordant basically bottom the auxilliary pin of sample introduction needle; At sample introduction needle master pin pin mouth a fillet is arranged, radius of corner preferably is slightly less than or equals the wall thickness of sample introduction needle master pin.

The beneficial effect of this utility model is:

This utility model welds together two pins, has strengthened the intensity of sample introduction needle, at sample introduction needle master pin pin mouth a fillet is arranged; The pin mouth is seamlessly transitted; Prevented that sample introduction needle from stabbing sealing gasket when lifting, improved the service life of sealing gasket, improved the work efficiency of instrument.

Description of drawings

Fig. 1 sample introduction needle is lifted structural representation.

Fig. 2 sample introduction needle is regained the back structural representation.

Fig. 3 improves preceding sample introduction needle pin mouth sketch map.

Fig. 4 this utility model improves back sample introduction needle pin mouth sketch map.

Among the figure: 1, sample introduction needle 2, sealing gasket 3, sealing shroud 4, sample introduction needle guard 5, sealing ring 6, sealing ring 7, sample introduction needle master's pin 8, the auxilliary pin of sample introduction needle.

The specific embodiment

Embodiment

As shown in Figure 4; Sample introduction needle is made up of the auxilliary pin 8 of sample introduction needle master pin 7 and sample introduction needle; The external diameter size of the auxilliary pin of the internal diameter of sample introduction needle master's pin and sample introduction needle is basic identical, and the auxilliary pin of sample introduction needle master's pin and sample introduction needle is through welding or bonding together, and the bottom of sample introduction needle master's pin is concordant or concordant basically with the bottom of the auxilliary pin of sample introduction needle; At sample introduction needle master pin pin mouth a fillet is arranged, radius of corner is slightly less than or equals the wall thickness of sample introduction needle master pin.Sample introduction needle master's pin thickness can be identical with the auxilliary pin thickness of sample introduction needle, also can be different, generally be preferably the auxilliary pin thickness of sample introduction needle less than sample introduction needle master pin thickness.

Owing to a suitable fillet is arranged at sample introduction needle pin mouth, original comparatively sharp pin mouth is become seamlessly transit, prevented that sample introduction needle from stabbing sealing gasket when lifting, improved the service life of sealing gasket, improve the work efficiency of instrument.

Claims

1. sample introduction needle that prevents to stab sealing gasket; It is characterized in that comprise the auxilliary pin (8) of sample introduction needle master pin (7) and sample introduction needle, the external diameter size of the auxilliary pin of the internal diameter of said sample introduction needle master's pin and sample introduction needle is basic identical; Weld or bond together at the main pin in sample introduction needle pin mouth place (7) and auxilliary pin (8); Sample introduction needle master's pin is concordant or concordant basically with the auxilliary pin of sample introduction needle bottom, at sample introduction needle master pin pin mouth a fillet is arranged, and radius of corner preferably is slightly less than or equals the wall thickness of sample introduction needle master pin.