Contact pressure type disposable hemostix with spring guide structure

Abstract

The invention discloses a contact pressure type disposable hemostix with a spring guide structure, which comprises a blood sampling barrel, a puncture structure, a guide structure and a contact pressure structure, a plurality of through grooves are sequentially formed in the side wall of a guide barrel in the direction away from an opening of the blood sampling barrel, a baffle movably penetrates through any through groove, an extrusion cylinder is movably arranged on the outer side of the guide cylinder in a sleeving mode, and presses the baffles into the guide cylinder and blocks an ejection spring, and extending grooves matched with the baffle is formed in the side wall of the extrusion cylinder. In use, the contact pressure type disposable hemostix realizes the segmented release of the ejection spring through the arrangement of the baffles, the guide cylinder and the extrusion cylinder, so that the ejection spring is released more uniformly and controllably, the extension length of the ejection spring is controlled by selecting different adjusting holes, and different puncture depths can be adjusted according to personal needs, so that the applicability of the whole device is wider.

Description

technical field [0001] The invention relates to the technical field of blood collection instruments, in particular to a pressure-touch disposable blood collection device with a spring guiding structure. Background technique [0002] The shooting and puncturing function is the primary condition to measure the quality of a blood collection device, and the vibration of the needle tip when it punctures the human skin is one of the important indicators. There are many factors that affect needle tip vibration, such as needle core shooting guide structure, needle core trigger mechanism, spring performance and so on. At present, the most considered in the existing design is to guide the shooting of the needle core, and generally adopt the method of opening a guide chute to guide the shooting movement of the needle core. [0003] In the prior art, the application number is "201710376831.2", a touch-type disposable blood collection device with a spring guiding structure, including a ...

AI Technical Summary

Problems solved by technology

[0004] However, the existing technology still has many defects, such as: after the spring is compressed, the middle part bulges and bends laterally, and is released as a whole under a large elastic tension, so that the spring has problems such as unstable release direction and unstable release speed during the release process. , while the existing technology only limits the release direction of the spring by setting the guide bar, and when only the guide bar is used to guide the spring that is released as a whole, the spring and the guide bar are in extrusion contact, consuming the elastic potential energy of the spring, Make the spring's ejection force weakened

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