| 摘要 |
<p>This device comprises a pair of pressure plates and a spring section (2), which is disposed between the pressure plates and comprises a plurality of springs (20). The springs (20) comprise: an approximately arc-shaped curved central section (21), the profile of which protrudes in a direction perpendicular to the expansion/contraction direction; a pair of nearly arc-shaped curved edge sections (22) which protrude, at the continuations of both edges of the curved central section (21), in the opposite direction to the curved central section (21); and base sections (23), which extend the edges of the curved edge section (22) almost in parallel to the direction perpendicular to the expansion/contraction direction, and in the same direction as that in which the curved central section (21) protrudes. The springs are arranged between the pair of pressure plates by fixing each base section (23) to the pressure plates. It is preferable that the springs (20), when naturally extended, are provided with a linear straight section (24) in between the curved central section (21) and the curved edge section (22).</p> |
