| 摘要 |
PURPOSE:To provide an optimum load supporting spring by detecting electrically the displacement of a load so that a damping force can be at will adjusted by adjustably varying at will the repulsion and polarity of an electromagnet. CONSTITUTION:An electromagnet winding 2 is fixedly mounted on a support bottom plate 1 and a cap-like body 3 formed of elastic material like rubber is mounted to cover the upper portion of said winding 2. An enclosed empty chamber 4 is formed in the cap-like body 3 and a permanent magnet plate 5 is mounted on the top of said chamber 4. Limit switches 9, 10 corresponding to a support top plate 6 mounted on said body 3 are provided to control the polarity of said winding 2 by the signals of switches 9, 10, and constituted such that attraction or repulsion is generated between said winding 2 and the permanent magnet plate 5. |
