Starter with pinion rotation restricting member

摘要

A resilient restricting member (61) of a rotation restricting member (6) which restricts a pinion moving body (4) from rotating is accommodated in a frame of a restricting member holder (62) under a flexed and loaded state so that the rotation restricting member (6) has a sufficient rotation-restricting function as long as the rotary force of the pinion moving body (4) does not exceed the load acting thereon at the time of engagement and restriction of rotation. When a pinion gear (30) abuts the end face of a ring gear (29) and the pinion moving body (4) is restricted from moving forward, the entire rotary force of an output shaft (3) acts on the pinion moving body (4). The resilient restricting member (61) flexes further in the restricting member holder (62) to allow rotation of the pinion moving body (4), thus enabling the pinion gear (30) to mesh the ring gear (29). Thus, the rotary force of the output shaft (3) is converted to the advancing force of the pinion moving body (4) surely even when the spiraling of the helical spline is not so large. <IMAGE>