| 摘要 |
<p>A resistance mechanism for an exercising device includes a frame, a bi-directional electric motor installed on the frame and provided with an output axle, a pulley fixedly mounted on the output axle and formed with two parallel circular grooves, an idle wheel rotatably arranged on the frame, a first belt having one end connected with one of the grooves of the pulley and wound thereon in a direction, a second belt having one end connected with another one of the grooves of the pulley and wound thereon in an opposite direction and engaged with the idle wheel, and an oscillating arm having one end pivotally connected with the axle of the exericsing device and another end fixedly connected with another end of the first belt and another end of the second belt, whereby a resistance force will be applied to the axle when theelectric bi-directional motor is turned on. <IMAGE></p> |
