| 摘要 |
PURPOSE:To enlarge the range of the setting of frictional force, and to elongate the life of the device by forming a projecting section to a rotating direction regulating plate, contacting the projecting section with the end surface of a gear to be driven and operating the rotating direction regulating plate through frictional combination between the end surface of the gear and the projecting section. CONSTITUTION:Connecting projecting pieces 10 are mounted to a rotor 2 of the small- sized synchronous motor 1 while the projecting pieces are rubbed and connected to the gear to be driven 8 in order to prevent the revolution of the rotor 2 in the reverse direction, and the rotating direction regulating plate 11 is mounted rotatably. The projecting section 14 is formed previously at the proper position of the rotating direction regulating plate 11 through an elastic piece 16 at that time, and the projecting section 14 is rubbed and connected to the end surface of the gear to be driven 8. When the rotor 2 is reversed, the rotating direction regulating plate 11 is turned together with the gear to be driven 8, a nose section 11a is connected to the connecting projecting pieces 10, and stops revolution. When the rotor is turned in the forward direction, the regulating plate is retreated in the direction that is not connected to the connecting projecting pieces 10, and does not prevent revolution. |
