| 摘要 |
An exercise wheel includes a housing, a chassis housed by the housing and including a compartment, a pair of rollers rotatably mounted in the compartment of the chassis and connected by a shaft, a main gear rotatably mounted in the compartment of the chassis, and a transmission gear for providing transmission between the shaft of the rollers and the main gear. Two torsion springs are respectively mounted to two sides of the main gear and each has a first end and a second end. The first end of each torsion spring is attached to an associated side of the main gear. The second end of each torsion spring is attached to the chassis. Each of the torsion springs is deformed to store resilience when the main gear is turned, thereby returning the main gear. Two grip rods are secured to the two sides of the housing, respectively. A universal caster is mounted to an underside of the chassis, thereby allowing the user to change moving direction of the exercise wheel.
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