| 摘要 |
<p>The present invention addresses the problem of providing a spiral spring configured so that the maximum value of stress is small and so that a variation in a stress distribution is small. A spiral spring (1) can be elastically deformed from a minimally deformed state to a maximally deformed state. In the maximally deformed state, the spiral spring (1) has a non-contact section in which at least a part of each of the portions of a spring material (S), which are radially adjacent to each other, is not in contact with each other, and the spiral spring (1) also has a contact section (C) in which the entire portions of the spring material (S), which are radially adjacent to each other, are in contact with each other. In the maximally deformed state, if the line which connects the center (O) of the spiral shape of a spiral section (21) and an outer contact section (B) where an outer end section (22) and an outer partner object (4) are in contact with each other is referred to as a reference line (L), an inner reference section (A) is disposed on the inside radially of the spiral section (21), in a sector formed by a central angle of from 80° to 160°, inclusive, measured about the center (O) of the spiral shape from the reference line (L) along the direction in which the spiral section (21) extends. The contact section (C) is disposed on the outside radially of the inner reference section (A).</p> |
