| 摘要 |
A mouse includes a main body, a scroll-wheel ring, an embedded shaft, a ball, and an elastic member. The scroll-wheel ring is rotatably disposed in the main body and has a ring-shaped gear portion. The ring-shaped gear portion has a plurality of gear teeth and tooth spaces alternately formed thereon. The embedded shaft is fixed to the main body and embedded into the scroll-wheel ring. The embedded shaft has a containing space opening toward the ring-shaped gear portion. The ball is disposed in the containing space and contacts the ring-shaped gear portion. The elastic member is disposed in the containing space. Two ends of the elastic member abut against an inner wall of the containing space and the ball respectively. When the scroll-wheel ring is rotated, the gear teeth and the elastic member drive the ball to switch between different tooth spaces with rotation of the scroll-wheel ring. |
