Vehicle seat belt apparatus
First Claim
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1. A vehicle seat belt apparatus comprising:
- a reel to wind and store a seat belt;
a motor to control a belt tension of the seat belt by rotating the reel;
a lock section to allow rotation of the reel in a normal state, and to prevent rotation of the reel in a belt extracting direction in an actuated state; and
a control section to restrict a lock operation of the lock section by rotating the motor in a belt retracting direction when the belt tension is controlled by the motor.
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Abstract
A vehicle seat belt apparatus includes a reel to wind a seat belt, a motor to control a belt tension of the seat belt by rotating the reel, and a lock section to allow rotation of the reel in a normal state, and to prevent rotation of the reel in a belt extracting direction in an actuated state. A control section is provided to restrict a lock operation of the lock section by rotating the motor in a belt retracting direction when the belt tension is controlled by the motor.
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Citations
22 Claims
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1. A vehicle seat belt apparatus comprising:
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a reel to wind and store a seat belt;
a motor to control a belt tension of the seat belt by rotating the reel;
a lock section to allow rotation of the reel in a normal state, and to prevent rotation of the reel in a belt extracting direction in an actuated state; and
a control section to restrict a lock operation of the lock section by rotating the motor in a belt retracting direction when the belt tension is controlled by the motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A vehicle seat belt apparatus comprising:
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a reel to wind and store a seat belt;
a motor to control a belt tension of the seat belt by rotating the reel;
a lock section having an unlocked state to allow rotation of the reel and a lock state to prevent rotation of the reel in a belt extracting direction; and
a control section including, a sensor section to detect a vehicle state requiring restraint of an occupant in a vehicle, and a controller to retract the seat belt automatically by supplying a motor current at a belt retracting current level to the motor when the vehicle state requiring the restraint of the occupant is detected, and to continue supplying the motor current to the motor in a belt retracting direction by decreasing the motor current from the belt retracting current level to a belt tension holding current level to hold the belt tension.
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21. A vehicle seat belt tension control method comprising:
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detecting a vehicle state requiring restraint of an occupant in a vehicle;
performing an automatic belt retracting operation to retract a seat belt to restrain the occupant when the vehicle state requiring the restraint of the occupant is detected; and
holding a belt tension of the seat belt after the belt retracting operation by applying a force to the seat belt to retract the seat belt.
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22. A vehicle seat belt apparatus comprising:
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means for performing an automatic belt retracting operation by controlling a motor in a belt retracting mode to retract a seat belt automatically when a possibility of an impact is detected; and
means for holding a belt tension of the seat belt after the belt retracting operation by controlling the motor in a belt tension holding mode.
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Specification