| 摘要 |
A total length of members (11, 13, 15, 17, 19, 21, 23, 25) formed in an X-axis direction of a spring (1) is larger than a spring length of the spring (1) and larger than a total length of members (12, 14, 16, 18, 20, 22, 24) formed in a Y-axis direction. With this arrangement, spring constants of respective axes can be increased, and a spring constant in a direction R can be set appropriately and freely within a wider range.
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