| 摘要 |
<p>PURPOSE:To disengage a centrifugal clutch reliably by connecting terminals of a DC motor upon interruption of power supply thereto thereby braking the DC motor and stopping the drive side of the centrifugal clutch and causing relative shift between the drive side and the driven side. CONSTITUTION:A circuit A connects the terminals of a motor 11 and brakes the motor during an interval after interruption of power to the motor 11 before movement of a nut member 14 to limit position P1 or P2 through coasting of a screw bolt 13. When a door lock is locked, power supply to the motor 11 is interrupted through a midway position P2-2 and upon arrival to a midway position P2-1, a movable contact board 31 connects fixed contact boards 32C, 32D. Consequently, both terminals of the motor 11 are connected through a switch SW and a diode D3 thus braking the motor 11. As a result, a clutch is braked on the drive side to cause a relative shift between the drive side and the coating driven side thus disengaging the centrifugal clutch reliably.</p> |
