| 摘要 |
A base for exercise devices is composed of a first rod member, a second rod member, a retaining mechanism, and a resilient member. The first rod member has two plates provided with a plurality of slots symmetrically. The second rod member is fastened pivotally with the two plates. The retaining mechanism is mounted on the second rod member and composed of a retaining member capable of a translational motion along the second rod member. The resilient member has an elastic force enabling the retaining member to undertake the translational motion so as to be releasably retained in the plates of the first rod member at such time when the second rod member is turned in relation to the first rod member to be coincident with any one of the slots of the two plates. The retaining member is released by the plates of the first rod member when the retaining member is exerted on by an external force greater than the elastic force of the resilient member.
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