Patent ID: 8827897
Filing Date: 2014-09-09
Classification: A61B,G02B

Abstract:
1. An endoscope comprising: an insertion portion which includes a curving portion configured to curve in a first curving direction and in a second curving direction opposite to the first curving direction; an operation portion provided proximally of the insertion portion, the operation portion including an operation portion main body, and a curving operation portion which is configured to perform a curving operation of the curving portion by rotating around a pivot shaft in a first rotation direction and in a second rotation direction opposite to the first rotation direction relative to the operation portion main body from a neutral position where the curving portion is in a non-curved neutral state; two draw-wires including: two operation wires including: a movement regulating portion which is provided within the operation portion and which is fixed relative to the operation main body, the movement regulating portion being configured to prevent the wire crossing portion in the second extended condition from moving distally toward the insertion portion such that the wire crossing portion is prevented from moving into the insertion portion, wherein the operation portion includes a medical treatment instrument insertion portion in which a medical treatment instrument insertion path is formed, the medical treatment instrument insertion path being in communication with a medical treatment instrument insertion channel provided within the insertion portion, and the block includes a coupling member which is provided in the medical treatment instrument insertion portion and in which the medical treatment instrument insertion path is provided at a distance from the first inner peripheral surface portion and the second inner peripheral surface portion.