Steering mechanism with self-locking function, operation method thereof and anastomat

Abstract

The invention discloses a steering mechanism with a self-locking function, an operation method thereof and an anastomat. The steering mechanism comprises a steering button, a rotating stop block, a rotating block and a steering rotating shaft; the rotating stop block comprises a stop block body and at least one blocking elastic sheet; at least one end part of the blocking elastic sheet is clamped in a groove; the steering button is further provided with at least one first push block which is adjacent to the blocking elastic sheet; and, when the steering button rotates, the first push blocks rotate synchronously to push the blocking elastic sheet to deform so as to switch the groove where the end part is clamped currently. According to the invention, locking of the steering rotating shaft is achieved through clamping and limiting of the blocking elastic sheet and the groove of an upper rotating block; when the steering button rotates, locking can be relieved and the groove where the blocking elastic sheet is clamped can be switched through the pushing effect of the first push block; when steering operation is stopped, the blocking elastic sheet falls into the currently-aligned groove of the upper rotating block, so that locking on the steering rotating shaft is achieved; and the resistance transmitted from the far end of the anastomat to the rotating shaft does not influence the angle of the steering button.

Description

technical field [0001] The invention belongs to the field of medical instruments, and relates to a large-rotation-angle stapler, in particular to a steering mechanism with a self-locking function, its operating method and a stapler. Background technique [0002] A stapler is a device used in medicine to replace manual suturing. A stapler is generally composed of an actuator, a cutting knife, and an instrument gun. The actuator is located at the front end of the instrument gun. During the operation, the steering needs to be turned according to the specific situation. Therefore, a steering mechanism needs to be provided in the stapler. Generally speaking, this kind of mechanism should be able to drive the device to reach the desired steering angle easily and smoothly on the one hand, and on the other hand, the angle should be able to be maintained stably after reaching. That is to say, by turning a rotary knob, a series of subsequent link mechanisms possessed by the instru...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing steering mechanism cannot precisely locate the rotation angle, and the reaction force from the clamped object may reversely drive the steering knob to rotate. An original steering mechanism is designed, and the steering knob can freely rotate to drive the actuator to reach Expected angle, then enters self-locking state, will not be affected by the reaction force from the clamping object

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