US Patent 7874537 Swivel device and video display apparatus equipped with swivel device

A swivel device includes a motor as a driving source, gears for transmitting a driving force of the motor, a ring member to which the driving force of the motor is transmitted, and a disk member made of a metal sheet to which the driving force of the motor is transmitted via the ring member. This disk member is integrally provided with eight boss portions that are arranged with equal spaces in the swivel direction. The ring member is integrally provided with a groove portion in a circular pattern into which the boss portions are inserted. In addition, the boss portions of the disk member are inserted in the groove portion of the ring member in a slidable manner.