BENDING OPERATION APPARATUS OF ENDOSCOPE, AND ENDOSCOPE

摘要

A brake adjustment body is disposed in a direction orthogonal to turning shafts between a bending drive shaft and a lock operation shaft. The brake adjustment body is configured by including an intermediate member that abuts a cam portion of the lock operation shaft, and a brake member that applies to the bending drive shaft a pressure according to displacement of the intermediate member. The intermediate member has a shaft body portion and a cylindrical sliding portion screwed together, and by rotating the sliding portion in a state where the shaft body portion and the sliding portion are screwed together, the distance between a proximal end portion and a distal end portion of the intermediate member may be adjusted, and when fixing force on the bending drive shaft is reduced, the distance may be re-adjusted to restore the fixing force.

主权项

1. A bending operation apparatus of an endoscope including an insertion section having a bendable bending portion and an operation section consecutively provided on a proximal end side of the insertion section, the bending operation apparatus comprising:
a base member disposed in the operation section; a first rotation shaft rotatably held by the base member and configured to rotate by a bending operation on the bending portion by an operator; a second rotation shaft provided side by side with the first rotation shaft and rotatably held by the base member; a cam portion provided in the second rotation shaft, configured to rotate in coordination with rotation of the second rotation shaft, and including an acting surface on an outer circumference; and a brake adjustment body formed to be adjustable in length from a proximal end portion to a distal end portion, the brake adjustment body being disposed between the acting surface of the cam portion and an outer circumferential portion of the first rotation shaft by adjusting the length, the distal end portion being configured to press against the outer circumferential portion of the first rotation shaft according to a rotation radius of the acting surface at a time of rotation of the cam portion.