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US 12,129,137 B2Granted
Webbing winding device
AssigneeKabushiki Kaisha Tokai Rika Denki Seisakusho
InventorsTakamasa Sato, Motoki Sugiyama
Life of this patent
Estimating the term…
Abstract
In the webbing winding device, the rotation of the output shaft of the motor is transmitted to the spool via the first gear train. In this state, when the rotation speed of the spool decreases and the rotation of the slider base of the first clutch decreases, the coupling pawl of the second clutch is pressed by the slider provided on the slider base to mesh with the ratchet gear, and the rotation of the output shaft of the motor is transmitted to the spool via the second gear train.
Claims3
A webbing winding device comprising:
- a spool to which a longitudinal proximal end of a long belt-shaped webbing is locked and which winds the webbing from a longitudinal proximal end side of the webbing by rotation in a winding direction;
- a drive unit that is driven to rotate an output shaft;
- a first rotation transmission unit that is coupled to the output shaft, receives input due to rotation of the output shaft, transmits the rotation of the output shaft in a predetermined direction to the spool in a state in which the rotation is transmissible to the spool, and rotates the spool in a winding direction;
- a second rotation transmission unit that is coupled to the output shaft, receives input due to rotation of the output shaft, sets a reduction ratio of rotation of the output shaft from the output shaft to the spool to be larger than a reduction ratio of the first rotation transmission unit, transmits the rotation of the output shaft to the spool in a state in which the rotation is allowed to be transmitted to the spool, and rotates the spool in a winding direction;
- and
- a switching unit that switches a transmission path of rotation from the output shaft to the spool from the first rotation transmission unit to the second rotation transmission unit in a case in which, in a state in which the rotation of the output shaft of the drive unit in the predetermined direction is transmitted to the spool via the first rotation transmission unit, a rotation speed of the spool due to transmission of rotation via the first rotation transmission unit is lower than a rotation speed of the spool when the rotation is transmitted to the spool via the second rotation transmission unit.
3 more elements
Dependencies are inferred from the claim text.