One-piece welded fixed disposable blood collection needle

Abstract

A one-piece welded and fixed disposable blood collection needle, comprising a lower casing, an upper casing and a connecting belt, the lower casing and the upper casing are connected as a whole through the connecting belt, and the connecting belt is located between the lower casing and the upper casing One end of the spring clamping slot, the upper shell is flipped 180 degrees to cover the upper end of the lower shell, and the joint surface of the two is fixedly connected by welding with the same material. The invention is simple and quick to operate during the assembly process of the product, saves labor and improves The rate of qualified products is high, the welding deformation and residual stress are small, and the product is extremely firm, which can guarantee a 5-year shelf life of the product, and the appearance is more beautiful.

Description

【Technical field】 [0001] The invention relates to a medical device, in particular to a disposable blood collection needle. 【Background technique】 [0002] There are many kinds of existing disposable blood collection needle products, for example, Chinese patents CN1011190129B and CN1961828B are two of them. These disposable blood collection needles have complex structures, poor production processability, and assembly is mainly carried out by hand. Included in these products are lower and upper shells with slideways, which must be die-cast and trimmed separately, then glued, aligned and bonded. There is no correlation between the upper shell and the lower shell, and there is no positioning structure for closing the cover. The two must be fixed together by glue bonding. In the traditional assembly production process, the upper shell and the lower shell The die-casting, alignment, gluing and bonding between them are completely manual, which not only complicates the operation, b...

AI Technical Summary

Problems solved by technology

There is no correlation between the upper shell and the lower shell, and there is no positioning structure for closing the cover. The two must be fixed together by glue bonding. In the traditional assembly production process, the upper shell and the lower shell The die-casting, alignment, gluing and bonding between them are completely manual, which not only complicates the operation, but also requires high technical requirements, and the alignment accuracy between the upper shell and the lower shell is not high, and it must take 5 minutes after gluing It takes about time to dry and solidify before pressing and bonding. If the glue is unevenly applied, too much or too little glue will affect the bonding strength, and it is difficult to improve production efficiency.

Through user return visits and tests, the applicant found that the structure of this type of blood collection needle is unreasonable, there is no positioning structure for easy assembly between the upper shell and the lower shell, and it is easy to merge and bond between the upper shell and the lower shell. Misplacement or dislocation occurs. At the same time, glue is used to bond the upper shell and the lower shell. Not only is the production efficiency low, the cost is high, and the assembly quality is difficult to guarantee

Gluing requires a lot of manpower, material resources and working hours. After the glue is applied, it takes a long time to wait for the glue to solidify. Usually, the number of manual assembly by one worker is only 2,000. The labor cost is too high and the production efficiency is too low.

In terms of the firmness of the connection between the upper shell and the lower shell, the firmness of the glue after solidification is not stable enough, and the strength is not high. The bonding strength will also be reduced accordingly, and the 5-year shelf life requirement cannot be met

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