AN ACTUATING DEVICE

摘要

An actuating device comprises a fixed circular or part circular gear (10), a holder (13) mounted for angular movement about the axis of the fixed gear, a movable part circular gear (14) slidably supported by the holder for movement into and out of engagement with the fixed gear, a spring (22) urging the movable gear into engagement with the fixed gear, and at least one operating member (24, 25) supported by the holder and movable relative thereto in one direction to initially disengage the movable gear from the fixed gear and to then angularly displace the holder relative to the fixed gear.