| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify a device to be simply fitted to a normal door lock by providing a transistor circuit setting the voltage of a motor drive section lower than the voltage of a starter battery at the time of an emergency operation. SOLUTION: The emergency operation power supply 19 of an emergency operation unit 17 is independently arranged between a starter motor and a door lock motor drive section 16. A transistor circuit setting the voltage of the motor drive section 16 lower than the voltage of the starter battery in an emergency operation is provided, and the voltage of the motor drive section 16 is set to 6V when the voltage of the starter battery is 9-20V, for example. A transistor 20 is located outside a controller of pulse lead wires, and a so- called electronic charge control section 22 opens or closes the transistor 20 so that the emergency power supply 19 has the constant voltage of 6V. The door lock can be designed with the relatively small motor drive section 16 having a small structure and a narrow tolerance on voltage according to this voltage limit, and an emergency operation device can be simplified.</p> |
