Lower trigger safety hemostix capable of achieving percussion and perception functions and blind assembling

Abstract

A lower trigger safety hemostix capable of achieving percussion and perception functions and blind assembling comprises a jacket, a percussion cover, a blood taking needle and an upper cover. The upper cover is fixedly assembled at the upper end of the jacket; an inner cavity of the jacket is a straight light through surface cavity, and a pair or two pairs of percussion and perception unlocking holes with the included angle being 90 degrees are formed in the side wall of the jacket; the upper section of the percussion cover and the inner cavity of the jacket are in sliding fit in the vertical direction and limited in the peripheral direction, the lower section of the percussion cover is in free plug-in mounting fit with a percussion cover stretching hole in the bottom of the jacket, the percussion cover is an elastic opening cover, and a pair of unlocking protrusions are arranged on the percussion cover; a pair of guiding protrusions are arranged on the outer side face of a needle handle of the blood taking needle, and an elastic percussion component is connected between the needle handle and an upper cover; when the blood taking needle is in the percussion state, the two unlocking protrusions move upwards to slide into the two percussion and perception unlocking holes, the percussion cover is expanded and reset, and the blood taking needle moves in the direction of a needle outlet along the percussion cover. The hemostix has the percussion and perception functions and can achieve blind assembling.

Description

technical field [0001] The invention relates to the field of medical instruments for clinical blood collection and testing, in particular to a lower trigger safety blood collection device with trigger sensing function and blind installation. Background technique [0002] "Disposable safety blood collection device", also known as "disposable safety blood collection needle", is the main blood collection device used in the medical sciences of various countries in the world for clinical final blood collection tests. Because it has the advantages of easy portability, convenient operation, thorough disinfection, strong sterility, and avoidance of iatrogenic cross-infection, it has been widely welcomed by both doctors and patients since it came out. However, as mainstream products, all kinds of "down-trigger disposable safety blood collection devices" can better complete the first element of blood collection, and all have their own advantages and specialties. This is why each produ...

AI Technical Summary

Problems solved by technology

It has excellent vibration damping and sound absorption for the vibration and sound during firing, so the firing that occurs in the inner cavity of the jacket is difficult to be clearly transmitted to the blood collection needle jacket, so it is not easy to be detected by the finger pulp skin of the medical staff. Accurately perceived

[0008] 2) Due to the firing method of the lower trigger safety blood collection device, it is not like the upper trigger safety blood collection device, which is fired by directly pressing down on the trigger upper cover of the upper trigger safety blood collection device with the finger pulp of the medical staff, nor is it like the side trigger safety blood collection device. The blood collection device is fired through the finger pulp of the medical staff, and directly presses the trigger button of the safety blood collection device next to it.

Although these two firing methods are different, they can pass the slight vibration generated directly to the sensory nerve endings of the finger pulp of the medical staff through the trigger cover or the trigger button when directly triggered, so that the fingers of the medical staff can accurately and directly perceive , unlike the firing method of the lower trigger safety blood collection device, the vibration caused by the firing method is completely indirect, which leads to difficulty in perception

[0009] 2. As a mainstream product, the "lower trigger type disposable safety blood collection device" generally has the disadvantage of high manufacturing cost, mainly because the product is mostly a labor-intensive enterprise characterized by manual assembly, and the assembly is labor-intensive. , while significantly increasing the assembly cost

Although this structure ensures the accuracy requirements of the firing function, it brings a lot of trouble and difficulty to the assembly process, resulting in the slideway limit groove and slideway limit rib (equivalent to the dovetail and dovetail groove of traditional machinery) Realize one-time rapid alignment, the end result is to reduce the assembly efficiency and increase the assembly cost

[0012] 3) In particular, a product developed by Tianjin Huahong is even more prominent (see CN201210080546.3, this product is a secondary development based on my original patent, see patent number CN201010574540.2 for details). Close to realize the locking and firing function of the blood collection needle handle, because the inner cavity space of the upper half of the blood collection device cover is obviously larger than the inner cavity space of the lower half of the blood collection device cover, so when assembling, there is a problem that the firing sleeve is inserted first When the jacket is on the upper part, because the gap between the firing sleeve and the inner cavity of the blood collection device jacket is too large, the firing sleeve has uncontrolled free swing and displacement, and the firing sleeve cannot be accurately inserted into the lower half of the blood collection device jacket. The two pairs of limit ribs or limit platforms in the road type bring difficulties to quick assembly, which leads to a significant increase in assembly man-hours, which in turn increases assembly costs and makes the total manufacturing cost too high

In the long run, products that cannot be assembled automatically are absolutely lifeless, and cannot participate in fierce market competition at all.

[0015] 3. The current safety blood collection device products, including upper trigger safety blood collection devices, lower trigger safety blood collection devices and side trigger safety blood collection devices, can only reduce the pain of needle insertion to varying degrees during actual blood collection, but it is difficult to achieve real painless blood collection

However, in order to realize truly humanized and painless blood collection, many R&D personnel in the industry need to work hard.

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