Patent ID: 11898635
Assignee: DAIDO KOGYO CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 3:
4. The tensioner of claim 3, further comprising:
a radial-contraction restriction member supported so as to be capable of rotating with respect to the fixed section about an axis running along a coil axis direction of the flat spiral spring, and engaged with another-end portion of the ring-shaped portion; and
a rotation limiting section configured to permit the radial-contraction restriction member to rotate in one direction about the axis with respect to the fixed section interlocked to radial enlargement of the ring-shaped portion, and to limit the radial-contraction restriction member from rotating in another direction about the axis with respect to the fixed section interlocked to radial contraction of the ring-shaped portion.