APPARATUS FOR DETECTING THE ANGULAR POSITION AND ANGULAR VELOCITY OF A ROTATABLE MEMBER AND A METHOD OF ASSEMBLING THE APPARATUS

摘要

An apparatus for detecting the angular position and angular velocity of a rotatable member such as a rotatable part of a steering system mounted in a vehicle and a method of assembling the apparatus. The apparatus includes a disc (14) secured on the outer periphery of a steering shaft (12), and a sensor (16) mounted on a steering column tube (18). The sensor (16) has projecting portions in which a light emitting element (160) and a light receiving element (162) are provided, respectively. The projecting portions are designed not to contact the disc (14) to avoid damaging the disc during assembly.