| 摘要 |
On one end, in the space between a first yoke (2) and a second yoke (3), a stationary element (4) is provided, and on the other end, a permanent magnet (1) is provided. The permanent magnet (1) has a circular columnar shape and one side in the radial direction is magnetized to be the N-pole and the other side is magnetized to be the S-pole. The stationary element (4) is provided so that, in a state where the position of the axial center (O) is constrained, the stationary element is movable in the axial direction. By rotating the permanent magnet (1) the distribution of the amount of magnetic flux (6-1) provided from the permanent magnet (1) to the stationary element (4) and the amount of magnetic flux (6-2) not provided from the permanent magnet (1) to the stationary element (4) are changed, causing the characteristics of a spring to change. This configuration enables the characteristics of the spring to be changed freely and maintained, without the need for continuous power consumption. |
