| 摘要 |
A driving device is mounted in the frame of a leg exercise machine and is formed of a motor having a spindle on which a transmission gear is mounted to impart the motion to a sprocket wheel via a chain. Two locating seats are movably disposed on the chain which is actuated to move along two guide slots of the seat of the leg exercise machine. Each of the locating seats are provided with a leg rod capable of a reciprocating motion along with the locating seat. The guide slots are provided with a switch to control the rotational direction of the motor.
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