| 摘要 |
A member tilting mechanism (12) includes a housing rear (3) having a concave spherical portion (3a), a cap support (5) having a convex spherical portion (5a), a plate pivot (4) having a pivot portion (4a), which is a tubular portion with an arc-like cross section, a spring plate (6) which presses against the cap support towards the housing rear in such a manner that the plate pivot is allowed to tilt in such a state that the pivot portion is held by the concave spherical portion and the convex spherical portion, a tapping screw (7) for fixing the spring plate to the housing rear, and a stopper (8) that is fixed to the housing rear for restricting the deformation of the spring plate in an anti-pressing direction. According to this structure, the stopper restricts the deflection of the spring plate in the anti-pressing direction so as to prevent the excessive tilt of the plate pivot. |
