| 摘要 |
A height adjusting device includes two lifting arms pivotally mounted to a main frame of a treadmill. Each lifting arm has a first end pivotally mounted to the main frame and a second end upwardly extending therefrom. The second end of each of the two lifting arms is pivotally connected to two opposite sides of the platform. A lateral rod has two opposite ends respectively secured on the two lifting arms such that the two lifting arms are synchronously operated and a pivot seat formed on a middle section of the lateral rod. A telescopic rod has a first end pivotally connected to the pivot seat and a second end pivotally mounted to a bottom of the platform for reciprocally driving the lateral rod and the two lifting arms to adjust a height of the platform.
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