Steering lock driving circuit and steering lock device

A steering lock device comprising:

• a microcomputer that, on the basis of a detected condition of a vehicle, outputs
• one of a lock command for restricting rotation of a steering shaft to carry out steering lock and an unlock command for releasing the steering lock;
• an unlock sensor that detects that a lock member is located in an unlock position at which the steering lock is released, wherein the lock member restricts rotation of the steering shaft when the lock member is located in a lock position;
• a latch circuit that, when an unlock signal indicating that the lock member is located in the unlock position is input from the unlock sensor to the latch circuit, holds the unlock signal;
• an OR circuit to which a logical NOT signal of a signal output from the latch circuit and a parking signal indicating that a shift position is a parking position are input;
• an AND circuit to which one of the lock command and the unlock command, an OR signal output from the OR circuit and a condition coincidence signal generated when information detected from the vehicle satisfies a predetermined condition are input;
• a NOT circuit that inverts the signal output from the latch circuit and outputs the inverted signal to the OR circuit as the logical NOT signal of the signal output from the latch circuit;
• a motor that drives the lock member;
• a motor driving circuit that outputs current to the motor on the basis of a drive permission signal output from the AND circuit;
• and
• a motor control unit that controls rotation of the motor.