| 摘要 |
A door lock is provided to secure a normal operation of a MICOM by stabilizing a rated voltage outputted in a voltage control part of a door lock. A door lock has a motor driving part for driving a dead bolt driving motor. The door lock includes a MICOM, a battery(11), a first condenser, a first diode, a voltage control part(30), a second condenser of large-capacity, and a third condenser of small-capacity. The MICOM outputs a motor driving signal which controls the motor driving part. The battery has a cathode terminal connected to a ground and an anode terminal which outputs a fixed voltage. The first condenser charges an output voltage of the battery in order to supply the driving voltage to the motor driving part. The first diode is connected to an anode of the first condenser. The input terminal is connected to the cathode of the first diode. The output terminal supplies a rated voltage to the MICOM. The second condenser is connected between the input terminal of the voltage control part and the ground. The third condenser is parallel connected to the second condenser.
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