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US 8,783,725 B2Granted
Restraint device
AssigneeTakata Corporation
InventorHideyuki Tombe
Life of this patent
Estimating the term…
Abstract
When releasing a connection between a motor and a spool, the value of a drive voltage is increased at start-up of the motor. After the rotating shaft of the motor starts rotating, the value of the drive voltage is set to a minimum value necessary to maintain the rotation of the rotating shaft. By this means, it is possible to prevent the number of revolutions of the rotating shaft of the motor from increasing unnecessarily and reduce the sound produced from the motor.
Claims9
A restraint device for restraining an occupant seated in a seat, comprising:
- a spool that winds up a belt for restraining the occupant;
- a motor that rotates the spool;
- a gear unit that is connected to the spool and the motor so as to transmit a rotation power of the motor to the spool, the gear unit comprising a plurality of gears;
- a clutch that locks or releases one of the plurality of gears of the gear unit through the rotation power of the motor, wherein the clutch locks said one of the plurality of gears when the clutch transmits the rotation power of the motor to the spool, and the clutch releases said one of the plurality of gears when the clutch does not transmit the rotation power of the motor to the spool;
- and
- a supply unit that supplies an electric power to the motor, wherein when the clutch releases said one of the plurality of gears, the supply unit supplies a first electric power to the motor at start-up of the motor and supplies a second electric power to the motor after the motor starts, the first electric power being greater than the second electric power.
3 more elements
Dependencies are inferred from the claim text.