Operating mechanism for bendable section of endoscope

Details Operating mechanism for bendable section of endoscope Operating mechanism for bendable section of endoscope

1987-01-16

1988-01-12

Grieb, William H.

Surgery

Truss

Perineal

138118, A61B 100

Patent

active

047184078

ABSTRACT:
An endoscope comprises an operating body and an inserting portion extending therefrom. A distal end section of the inserting portion is formed into a resiliently bendable section. An angularly movable member is mounted within the operating body for angular movement around a center of rotation. The bendable section is operatively connected to the angularly movable member through a pair of operating wire sections. An operating member located exteriorly of the operating body is operatively connected to the angularly movable member. A biasing mechanism is associated with the operating body and includes a spring spirally wound within a casing. One end of the spring drawn out of the casing applies a spring force to a point of action on the angularly movable member spaced from the center of rotation thereof. When the bendable section extends straight, the spring force of the spring passes through the center of rotation so as to apply substantially no moment of rotation to the angularly movable member, and when the bendable section is bent, the spring force of the spring applies moment of rotation to the angularly movable member.

REFERENCES:
patent: 4499895 (1985-02-01), Takayama
patent: 4503842 (1985-03-01), Takayama
patent: 4559928 (1985-12-01), Takayama
patent: 4617914 (1986-10-01), Ueda
patent: 4655257 (1987-04-01), Iwashita
patent: 4659195 (1987-04-01), D'Amelio et al.

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