Patent ID: 7893571

Claim:
A stepping motor comprising: a bracket including a first supporting unit and a third supporting unit; a housing including a first portion coupled to the third supporting unit, a second portion connected to the first portion, and a third portion integrally formed on the second portion; a stator including a first stator faced with the first portion of the housing and a second stator faced with the second portion of the housing, wherein the stator is disposed in the housing to form an electric field; a magnet faced with the stator and configured to provide a magnetic field; a shaft having a lead screw and rotating with the magnet, wherein the shaft is rotatably supported by the first supporting unit; a second supporting unit disposed in the third portion of the housing; and a stopper coupled to the third portion of the housing and configured to elastically support the shaft together with the second supporting unit and to prevent the second supporting unit from being removed out from the third portion of the housing, wherein an inner surface of the stopper is contacted with an outer surface of the third portion of the housing, wherein the stopper is overlapped with the third portion of the housing in a radial direction and the stopper is not overlapped with the first and second portion of the housing in the radial direction.