Safe blood taking needle

Abstract

The invention discloses a safe blood taking needle, which is characterized in that the upper part of a barrel body is a cone; the cone is provided with a press key; a strip-shaped gap is formed on the barrel body wall on the lower part of the press key; the barrel body on the upper part of the cone is cylindrical; a cylinder is formed in the center of a needle bed; a spring assembling platform is formed on the bottom of the cylinder; a spacing ring body is formed on the surface of the spring assembling platform; an annular step is formed on the edge of the spring assembling platform on the outer side of the spacing ring body; a notch is formed on the spring assembling platform; and an elastic stator is formed in the notch. According to the safe blood taking needle, an individual built-in spring is adopted, the integral retraction of the needle bed part is realized by the expansion force of the spring, the static locking structure of the needle bed is damaged in a pressing mode, and the safe blood taking needle can be operated with one hand. The inside of the barrel body is provided with a needle bed locking mechanism which can be used for spacing and fixing the retracted needle bed so as to realize the safe operation of the blood taking needle. The product has the advantages of reasonable integral design and artful concept, each component is precisely cooperated, automatic assembling in one time can be realized, and the safe blood taking needle has a good practicality.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a safety blood collection needle, and in particular to its mechanical connection structure. Background technique [0002] Reference document, application number: 201010622685.5, applicant: Zhang Yaping, application date: 2010.12.27, this case discloses a new type of pen-type safety blood collection needle, which consists of a needle tube, a spring, a needle seat, a blood-blocking sleeve, an outer cylinder, a button and a sheath Composition; its features are: the center of the needle holder has a hole in which the needle tube is bonded, the lower part of the needle holder has a spring support platform, and its outer circumference is covered with springs. Near the middle of the support platform, there is a vertically upward inner circle and outer square pillar platform, and the inner circle The aperture is slightly larger than the outer diameter of the spring, and the middl...

AI Technical Summary

Problems solved by technology

[0003] A pen-type safety blood collection needle is disclosed in the above reference document. It is not difficult to see from the above disclosure that the structure of this safety blood collection needle is relatively complicated, and the built-in spring requires secondary assembly, which is not conducive to the automatic assembly of the product.

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