Motor mit Umwandlung einer Drehbewegung in eine Hin- und Herbewegung

摘要

A rotation-reciprocation converting motor comprises: a rotor (32) which is rotatable in a forward direction and in a reverse direction; and a motor shaft (33) which is slidably guided by a bushing (41), and which is engaged with the rotor (32) to convert the rotating motion of the rotor into a reciprocating motion. The motor shaft (33) includes: a threaded portion (33a) which is engaged with the rotor; and the rotation regulating portion (33b) which is fitted in a bushing (41), the rotation regulating portion (33b) having an abutting portion (33c) which is abutted against a rotational position determining stopper portion (32b) which is formed at an end of the rotor. This feature makes it possible to reduce the number of portions which should be high in accuracy from three to two, which contributes to an improvement in accuracy of the motor.