Patent ID: 7485073

Claim:
A muscle exerciser, comprising: an upper cover; a controller disposed substantially at a middle of the upper cover; two sliders disposed at two sides of the upper cover; a base connected to the upper cover; and an internal transmission mechanism disposed between the base and the upper cover, wherein the internal transmission mechanism comprises: a motor serving as a driving device and having a motor shaft; a first pulley mounted on the motor shaft; a second pulley, which is connected to the first pulley through a transmission belt and mounted on a pulley shaft; two transmission wheels mounted on two ends of the pulley shaft two transmission links respectively connected to the transmission wheels; two sliding seats respectively connected to the transmission links; sliding tracks respectively passing through bottoms of the two sliding seats; and fixing members for respectively fixing the sliding tracks, wherein the two transmission wheels and the two transmission links are respectively connected together oppositely such that the motor drives the two transmission wheels to move the two sliding seats oppositely and synchronously and thus to open and close hands/feet.