Motor retractor
AssigneeKabushiki Kaisha Tokai Rika Denki Seisakusho
InventorsTakuhiro Saito, Seiji Ikeda
Life of this patent
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Abstract
A motor retractor, comprising: a winding shaft which winds up a webbing for restraining a vehicle passenger; a motor which rotates the winding shaft in a webbing winding-up direction; and a control portion which, after release of the webbing wearing state of the passenger: drives the motor to cause the webbing to be wound up around the winding shaft; stops the motor when an overload on the motor is detected during the winding-up; redrives the motor after a predetermined time having elapsed after the motor is stopped due to detection of the overland, and adjusts, at the time of the redriving, a driving state of the motor according to the time of driving the motor that has elapsed before the overload detection, is provided.
Claims6
A motor retractor, comprising:
- a winding shaft which winds up a webbing for restraining a vehicle passenger;
- a motor which rotates the winding shaft in a webbing winding-up direction;
- and
- a control portion which, after release of the webbing wearing state of the passenger:
- drives the motor to cause the webbing to be wound up around the winding shaft;
- stops the motor when an overload on the motor is detected during the winding-up;
- redrives the motor after a predetermined time having elapsed after the motor is stopped due to detection of the overload, and
- adjusts, at the time of the redriving, a driving state of the motor according to the time of driving the motor that has elapsed before the overload detection,
- wherein, when the time of driving the motor that has elapsed before the overload detection is equal to or longer than a preset time, the control portion lowers the magnitude of a supply current to the motor at the time of the redriving.
A motor retractor comprising:
- a winding shaft which winds up a webbing for restraining a vehicle passenger;
- a motor which rotates the winding shaft in a webbing winding-up direction;
- and
- a control portion which, after release of a webbing wearing state of the passenger:
- feeds power to the motor to cause the webbing to be wound up around the winding shaft;
- interrupts the power feeding to the motor when an overload on the motor is detected during the winding;
- and
- gradually increases the magnitude of a current to resume the power feeding to the motor after a predetermined time has elapsed after the interruption of power feeding to the motor,
- wherein the control portion decreases the magnitude of a stationary current for the motor after the resumption of the power feeding to a value that is smaller than the magnitude of the stationary current for the motor before the overload detection.
Dependencies are inferred from the claim text.