ACTUATOR IN POWER ANTENNA DEVICE

摘要

As the first aspect of the invention, an actuator in a power antenna device includes a worm provided on a shaft of the motor; a first gear unit integrally including a worm wheel and a small intermediate gear; a second gear unit integrally including a large internal gear and a part of a clutch device; reduction gears including first reducing gears (a pair of the worm gear and the worm wheel) and second reducing gears (a pair of the small intermediate gear and the large internal gear); and a support board made of a hard material such as metal and integrally fixed to a casing for the actuator, and which rotatably supports the first and second gear units on the side where the small intermediate gear and the large internal gear engage. As the second aspect of the invention, the actuator comprises: a cord case for housing a drive cord; first reducing gears placed close to one side of the cord case and inside an imaginary cylinder defined by the extended outer periphery of the cord case; a clutch device arranged in an opposite side of the cord case and inside the internal periphery of the cord case; and second reducing gears arranged inside the internal periphery of the cord case.