Electric steering wheel lock device

摘要

An electric steering wheel lock device includes a control circuit that starts and stops supplying power to a motor that actuates a lock mechanism to lock and unlock a movable member of a vehicle steering mechanism. The control circuit changes contact states of first and second relays to switch a supplying direction of the power. A drive restriction unit stops and starts supplying power to a drive circuit for the motor. The control circuit changes contact states of the first and second relays when the drive restriction unit stops supplying power to the drive circuit.

主权项

1. An electric steering wheel lock device comprising:
a control circuit that starts and stops supplying power to a motor that actuates a lock mechanism to lock and unlock a movable member of a vehicle steering mechanism, wherein the control circuit changes contact states of first and second relays to switch a supplying direction of the power; and a drive restriction unit that stops and starts supplying power to a drive circuit for the motor; wherein the control circuit changes contact states of the first and second relays when the drive restriction unit stops supplying power to the drive circuit, the drive circuit is connected to a high potential power supply and a low potential power supply, and in a state in which the drive restriction unit stops supplying power to the drive circuit, the control circuit first connects the first and second relays to the high potential power supply and then supplies power to the drive circuit before changing a contact state of one of the first and second relays in accordance with a direction in which the motor produces rotation.