| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of parts by providing light guide members having the same shape so that each surface may fit the radius of curvature of each operation button surface at light guide member fitting holes to be fitted to the plural operation buttons and arranged to constitute substantially one radius of curvature with the whole of the surface shapes. SOLUTION: Light guide members 7 are respectively fitted into light guide member fitting holes 71 formed at operation buttons 1-3. In the holes 71, their front surface side dimensions (d, f) are larger than their rear surface side dimensions (c, e) so that a large pull-out inclination for molding is formed. The hole 71 is inclined outside by an angle (a) at the middle operation button 3 with respect to an axis 70 being a reference in the outside operation button 1, and in the inner operation button 3 there is outward inclination by an angle (b) larger than the angle (a). Accordingly, when the member 7 is fitted into the hole 71, the surface of the member 7 fits the radius of curvature of the operation button.
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