| 摘要 |
A reciprocal device for exercise machines includes a base having a plurality of positioning rods and stop members on a top surface thereof and each positioning rod has a spring mounted thereto. A movable member has a plurality of sockets which are mounted to the springs and the positioning rods. A cover is mounted to the movable member. The base and the movable member each have a sensing rod and the two sensing rods are located in alignment with each other so that when the movable member is stepped downward, the two sensing rods contact and send a signal to allow the exercise machine to proceed a function.
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