Abstract: A power supply member 50 is provided with a convex part 60 that fits into either of a pair of cutout parts provided in a gear case, thereby positioning a connector connecting part 52 with respect to the gear case and a motor yoke along a circumferential direction of a rotating body. Thus, with a single power supply member 50 it is possible to form a seat motor with various specifications (disposition mode A and disposition mode B) wherein the protrusion direction of the connector connecting part 52 differs. Accordingly, the layout property can be improved, versatility can be increased, and yield can be improved.

Abstract: A seat 1 has a seat cushion 2 and a seat back 3 and is mounted on a vehicle such as a car. A reclining mechanism 4 capable of adjusting the tilt angle of the seat back 3 is provided between the seat cushion 2 and the seat back 3. The reclining mechanism 4 has a seat driving device 21 provided with an electric motor 22 and a speed reduction mechanism 23. The speed reduction mechanism 23 has a worm shaft 45 connected to a motor shaft 34 of the motor 22 and a worm wheel 47 meshed with a worm 46 of the worm shaft 45. The worm 46 is a multi-thread worm having two or more threads.

Abstract: A seat 1 has a seat cushion 2 and a seat back 3 and is mounted on a vehicle such as a car. A reclining mechanism 4 capable of adjusting the tilt angle of the seat back 3 is provided between the seat cushion 2 and the seat back 3. The reclining mechanism 4 has a seat driving device 21 provided with an electric motor 22 and a speed reduction mechanism 23. The speed reduction mechanism 23 has a worm shaft 45 connected to a motor shaft 34 of the motor 22 and a worm wheel 47 meshed with a worm 46 of the worm shaft 45. The worm 46 is a multi-thread worm having two or more threads.

Abstract: A power supply member 50 is provided with a convex part 60 that fits into either of a pair of cutout parts provided in a gear case, thereby positioning a connector connecting part 52 with respect to the gear case and a motor yoke along a circumferential direction of a rotating body. Thus, with a single power supply member 50 it is possible to form a seat motor with various specifications (disposition mode A and disposition mode B) wherein the protrusion direction of the connector connecting part 52 differs. Accordingly, the layout property can be improved, versatility can be increased, and yield can be improved.