| 摘要 |
<p>A lifting device (100) adapted to bear an object is provided. The lifting device includes a body (110), a sliding member (120), an elastic member (130), an adjusting member (140) and a connecting member (150). The sliding member is slidably disposed at the body moves along a first axis (A1) and stays at any position between a highest position (P1) and a lowest position (P2). A first end of the elastic member is disposed at the body. The adjusting member is pivotally disposed at the body and linked up to the elastic member. The connecting member is disposed between the adjusting member and the sliding member. Wherever the sliding member is located, total torques generated by a force provided by the elastic member, gravity of the object and the sliding member, friction forces between the body, the sliding member, the elastic member, a fixed pulley and the connecting member are substantially zero.</p> |
