| 摘要 |
<p>A plate (5) secured by staking to a D-cut section (3c) of a rotation shaft (3) is provided with an engagement hole (5b). A positioning projection (4c) engaging with the engagement hole (5b) is formed on a plate spring (4) sandwiched between the rotation shaft (3) and the plate (5). The tilt (?1) of the plate spring (4) due to the amount (B) of a gap between the positioning projection (4c) and the engagement hole (5b) located far from the rotation center axis (X) is less than the tilt (?2) due to the amount (A) of a gap between a straight section (4d) and the D-cut section (3c) located close to the rotation center axis (X). As a result, the presence of the positioning projection (4c) and the engagement hole (5b) reduces play of the plate spring (4) in the direction of rotation thereof.</p> |
