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 speed reducer (32) including a gear case (33) is attached in an electric motor, and a pinion is provided to an output shaft (35) protruding from the gear case (33). A base portion (33a) protruding in a diametrical direction is provided to the gear case (33) and a support shaft is mounted to the base portion (33b). A sector gear (42) is fixed to a base end of a lift arm (24), and the sector gear (42) is swingably supported by the support shaft and meshed with the pinion. In addition, a groove portion (42c) in a circular arc shape is provided to the sector gear (42), and a gear cover (51) is fixed to the gear case (33) by a bolt (58) penetrating the groove portion (42c) and a bolt (54) disposed on an outer periphery side than the sector gear (42), and the gear cover (51) covers a mesh portion of the pinion and the sector gear (42) and presses the sector gear (42) toward the gear case (33).

Abstract: A speed reducer (32) including a gear case (33) is attached in an electric motor, and a pinion is provided to an output shaft (35) protruding from the gear case (33). A base portion (33a) protruding in a diametrical direction is provided to the gear case (33) and a support shaft is mounted to the base portion (33b). A sector gear (42) is fixed to a base end of a lift arm (24), and the sector gear (42) is swingably supported by the support shaft and meshed with the pinion. In addition, a groove portion (42c) in a circular arc shape is provided to the sector gear (42), and a gear cover (51) is fixed to the gear case (33) by a bolt (58) penetrating the groove portion (42c) and a bolt (54) disposed on an outer periphery side than the sector gear (42), and the gear cover (51) covers a mesh portion of the pinion and the sector gear (42) and presses the sector gear (42) toward the gear case (33).

Abstract: An automatic opening and closing device including: a trunk lid; a drive unit which generates drive force for operating the opening and closing member; a hinge arm which is mounted between a rear fender and wheel house inner panel and the trunk lid; and a first link and a second link which transmit the drive force of the drive unit to the trunk lid. The drive unit is fitted to an edge portion of a trunk room aperture portion, and the first and second link are provided so as to straddle the hinge arm.

Abstract: Provided is a power actuator system for actuating a closure member (1) such as a trunk lid which is compact in size and has a minimized protrusion. A first link (8) is connected to an output shaft of a powered actuator (7), and a free end of the first link is connected to an end of a second link (9). The other end of the second link is pivotally connected to a hinge arm (4) which is fixedly attached to a closure member and pivotally supports the closure member to a fixed part such as a vehicle body. The first link is adapted to extend substantially from the output shaft towards the closure member as the first link swing around the output shaft, and the second link extends substantially perpendicularly with respect to the center line.

Abstract: An automatic opening and closing device including: a trunk lid; a drive unit which generates drive force for operating the opening and closing member; a hinge arm which is mounted between a rear fender and wheel house inner panel and the trunk lid; and a first link and a second link which transmit the drive force of the drive unit to the trunk lid. The drive unit is fitted to an edge portion of a trunk room aperture portion, and the first and second link are provided so as to straddle the hinge arm.

Abstract: Provided is a power actuator system for actuating a closure member (1) such as a trunk lid which is compact in size and has a minimized protrusion. A first link (8) is connected to an output shaft of a powered actuator (7), and a free end of the first link is connected to an end of a second link (9). The other end of the second link is pivotally connected to a hinge arm (4) which is fixedly attached to a closure member and pivotally supports the closure member to a fixed part such as a vehicle body. The first link is adapted to extend substantially from the output shaft towards the closure member as the first link swing around the output shaft, and the second link extends substantially perpendicularly with respect to the center line.