linear cutting stapler

Abstract

The invention discloses a straight cutting stapler. The straight cutting stapler comprises an upper forceps holder, a lower forceps holder and a reset spring, wherein the upper forceps holder comprises a nail bin support and a first handle pivoted and positioned on the nail bin support, the first handle comprises a fixed holding portion which can be matched with the nail bin support, the reset spring comprises a first end fixed on the first handle, a second end opposite to the first end and a first abutting portion formed between the first end and the second end, the reset spring of the above structure is used for supplying acting force for the first handle to pivot in a preset range distant from the nail bin support, and when the fixed holding portion is matched with the nail bin support, the second end of the reset spring is abutted with the first abutting portion and the nail bin support. When the reset spring bounces off the first handle, an extra support point is provided by the first abutting portion, and the support point is more distant from a pivoting shaft, pivoting around the nail bin support, of the first handle, so that bouncing force needing to be supplied by the reset spring can be reduced.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a linear cutting stapler. Background technique [0002] Linear cutting staplers are widely used in surgical operations for wound suturing, internal tissue suturing and cutting, etc. A typical linear cutting stapler has two functions of suturing and cutting, and excess tissue is removed while suturing the wound. ginseng Figure 4 , this type of linear cutting stapler 100' generally includes upper and lower jaws 10', 20' that can be closed or opened to each other; The staple cartridge 12' and the first handle 13' pivotally positioned with the staple cartridge support 11', the first handle 13' includes a holding portion that can cooperate with the staple cartridge support 11', and the lower jaw 20' includes an anvil 21 ' and the second handle 22' mounted on the anvil 21'. [0003] When the upper and lower jaws 10', 20' need to be closed, the upper jaw 10' is in...

AI Technical Summary

Problems solved by technology

During this process, the end of the reset elastic piece 30 ′ matched with the staple cartridge bracket serves as a support point. Under the condition of the same spring-off moment, the closer the support point is to the pivot axis, the greater the force required. In order to ensure that the reset elastic piece 30 ′ The "energy storage" is sufficient, and it is necessary to ensure a certain length of the reset shrapnel, which in turn causes the support point to be too close to the pivot axis, making it even more difficult for the reset shrapnel 30' to bounce off the first handle 13'

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