| 摘要 |
A trampoline contains a flexible jumping bed enclosed by a closed frame 51,53 supported by a number of legs 57 on the ground. A cushion element 58 such as a spring, a rubber block, or a hydraulic or air buffering device is provided at each connection 52 between the frame and the legs. The cushion element 58 absorbs part of the downward force exerted on the frame and the legs so that an extended operation life of the trampoline is achieved. |
