| 摘要 |
An electric cycling exerciser includes a housing with a rotatable shaft, two pedals attached to the shaft, a gear mounted on the shaft, and a motor for driving the gear. A safety member is fixed to the shaft and received in the gear. The gear includes at least one groove for receiving an elastic element and an insert. The safety member includes at least one insertion groove for receiving the insert. The insert is biased by the elastic element into the groove, allowing the gear and the shaft to turn jointly. When a user's foot is stuck between a respective pedal and the housing or the respective pedal is subject to a force greater than an engaging force between the insertion groove and the insert, the insert is disengaged from the insertion groove such that the shaft and the safety member are not turned while the gear is being turned.
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