Electric steering lock device
AssigneeAlpha Corporation
InventorKazuhisa Yabumoto
Life of this patent
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Abstract
An electric steering lock device includes an operation relay for operating an electric motor, a pair of switching relays for switching the rotating direction of the electric motor, and diodes for energizing each relay connected to a port of a control unit respectively. A steering shaft is unlocked by providing the operation relay in an ON status to allow the electric motor to displace the locking rod in the unlocking direction. The steering shaft is locked by providing the operation relay and the pair of switching relays in an ON status respectively to allow the electric motor to displace the steering rod in the locking direction.
Claims2
An electric steering lock device, comprising:
- an electric motor;
- an electric motor control circuit including
- an operation relay for operating the electric motor, and
- a pair of rotating direction switching relays for switching a rotating direction of the electric motor;
- and
- a locking rod that is displaced by driving of the electric motor, the locking rod being displaced between a lock position at which a steering shaft is locked to prevent rotation and an unlock position at which the steering shaft is unlocked to allow rotation,
- wherein:
- when the steering shaft is to be unlocked, the electric motor displaces the locking rod to the unlock position by energizing the operation relay in an ON status, and
- when the steering shaft is to be locked, the electric motor displaces the locking rod to the lock position by energizing the operation relay and the pair of switching relays in an ON status respectively.
Dependencies are inferred from the claim text.