Handle for pipes

Abstract

The invention provides a handle for pipes, wherein an operation part can be easily stopped at any radial position, the operation force of the operation part can be in fine adjustment, and the ageing of fastening force is little changed once the fastening force is set. The handle for pipes has: a handle body (24); an button for operation (22) having a medial axle part (28) moved along the axial direction and freely installed in the axle hole of the handle body (24); a front end cover (44) positioned at the periphery of the medial axle part (28), freely moved along the axial direction, and rotationally bolt-jointed with the far end of the handle body (24) surrounding the axle core; an annular elastic component (42) between the far end of the handle body (24) and the far end of the front end cover (44) and positioned at the inner periphery of the front end cover (44) and the outer periphery of the medial axle part (28), in which the fastening force at the outer periphery of the medial axle part (28) is changed according to the axial bolt-jointed position relative to the front end cover (44) of the handle body (24); and ratchet feel endowing mechanisms (50, 54) installed between the front end cover (44) and the handle body (24) and endowing the ratchet feel according to the rotational pitch angle (theta).

Description

technical field [0001] The present invention relates to a catheter handle, and more particularly relates to a catheter handle capable of finely adjusting the operating force of an operation unit. Background technique [0002] Various catheters have been proposed as medical catheters. A handle for the catheter is usually provided on the proximal end side of the catheter. Various catheter handles have been proposed depending on the type of catheter. [0003] For example, the operation portion of the catheter handle may be manipulated, and the distal end portion of the catheter may be bent or stretched when the catheter is intended to be bent. [0004] As a catheter handle used in this case, for example, as shown in Patent Document 1 below, a handle having a piston structure in which a driving member is incorporated in a long tube has been proposed. In this conventional handle, by moving the piston in the axial direction relative to the cylinder, the distal end portion of th...

AI Technical Summary

Problems solved by technology

[0006] However, in the existing handle, in order to improve the braking performance, if the fastening force of the annular elastic member is to be enhanced, the movement operation of the operating part of the handle becomes heavy from the beginning, and the operation is difficult.

In addition, if the operability is to be improved, the fastening force of the ring-shaped elastic member is reduced, and the braking performance is reduced, and it is difficult to finely adjust the fastening strength.

[0007] In addition, after setting the fastening strength of the ring-shaped elastic member to an appropriate value in the existing handle, there is a risk that the fastening strength will change over time due to the elasticity of the elastic member.

In order to prevent aging changes, it is also considered to fix the threaded position of the threaded part with an adhesive, but in this case, after that, the fastening strength of the ring-shaped elastic part cannot be finely adjusted

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