| 摘要 |
PROBLEM TO BE SOLVED: To reduce play of an adjustment lever by adapting an engagement state between an engagement protrusion and a long hole having a partial circular arc shape centered about a tilt shaft, and to allow the engagement protrusion to be smoothly displaced upward inside the long hole.SOLUTION: One outer edge of both outer edges in a front-rear direction of an engagement protrusion 33a is brought into abutment with one inner edge of both inner edges in the front-rear direction of a long hole 17a at an upper end part of the one outer edge, in a state where moment centered about a rod member for tilt acts on a portion provided with the engagement protrusion 33a. At the same time, a lower end part of the other outer edge is brought into abutment with the other inner edge. Furthermore, displacement along the front-rear both inner edges of the long hole 17a is smoothly performed. For this purpose, a front outer edge 34a of the engagement protrusion 33a has such a shape that vertical both end parts protrude forward beyond an intermediate part in the vertical direction and have no sharp corners. |
