ROTARY OPERATION DEVICE

PROBLEM TO BE SOLVED: To provide a rotary operation device for being easily assembled without having wrong detection of rotation displacement of a rotating gear accompanying the applied rotation operation. SOLUTION: In the operation device in which rotation displacement of a gear 14a is obtained by rotating a gear 15a supported in free rotation by a second support part 10b engaging with rotation of a gear 14a supported in free rotation by a first rotation support part 10a, then detecting a rotation displacement of the gear 15a by a rotation detecting sensor 21, the gears 14a, 15a with positioning carried out of each center of a rotation region of the gear 15a for detecting the rotation detecting sensor 21 and a region for rotating the gear 14a are attached to and detached from the first and the second support part 10a, 10b in a restrained state by inserting a pin 18 into overlapped through-holes 14d, 15c to restrain as rotation unable. COPYRIGHT: (C)2010,JPO&INPIT