| 摘要 |
The present invention relates to an electric conduction device which is placed between a conductive rotator and a stator which is arranged having a constant air gap between the stator and the rotator. The electric conduction device comprises; a ball-shaped conductive brush which is in rolling-contact with the rotator; a conductive brush bracket which allows the brush to be mounted thereon with a rotary material and is supported to the stator; and a terminal which is connected with the other end of an elastic piece of which one end is connected to the brush bracket. An indented part is formed along the outer surface of the rotator so that the brush is partially inserted and performs a rolling operation while the brush is in contact with the rotator linearly. The brush bracket is formed into a shape which surrounds the upper half part of the brush. The brush is formed into a ball shape by the electric conduction device in which multiple conductive balls are placed between the brush bracket and the brush. The multiple balls are inserted into the brush bracket and are mounted with the rotary material to perform the rolling operation while being in contact on the rotator linearly. Therefore, the noise is reduced by reducing contact sounds and the abrasion is suppressed by reducing friction resistance, and the lifespan of the brush is extended. |
