To prevent increase of impact noise generated by a one-way clutch when a reversible drive motor starts or a driving force is switched for the rotational direction of the drive motor.
This driving force switching device 30A includes: the reversible drive motor 51; first and second rotating shafts 31A and 41A rotatably connected to the drive motor 51 through a transmission mechanism; a first one-way clutch 52 which transmits the rotational force of the drive motor 51 to rotationally drive the first rotating shaft 31A only when the drive motor 51 rotates forwardly; and a second one-way clutch 58 which transmits the rotational force of the drive motor 51 to rotationally drive the second rotating shaft 41A only when the drive motor 51 rotates reversely. In the driving force switching device 30A, the first and second one-way clutches 52 and 58 are fitted into the motor shaft 51a of the drive motor 51 which is axially shorter than the first and second rotating shafts 31A and 41A.
Masakazu Ito
Shunichi Takahashi
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