| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical scanner in which the deviation of beam spot array is prevented by suppressing a thermal deformation of the base member of a light source apparatus due to the thermal expansion of a housing, and to provide an image forming apparatus equipped with the optical scanner. SOLUTION: Columnar bosses 50a and 50b are erected on the bottom face of a housing 100 of the optical scanner, a first and a second screw holes 51 and 52 are formed for fixing a base member 30 with screws. The base member 30 is formed as a unit in an L-shape viewed from the side composed of a flat plate part 30a and an upright part 30b. On the back face of the flat plate part 30a, a ring-shaped engaging part 53 is projectingly provided to be engaged with the boss 50a. When the engaging part 53 and the boss 50a are engaged, a first opening hole 54 having the same diameter as that of the first screw hole 51 is formed at the position at which the engaging part and the first screw hole 51 are superimposed, and a long second opening hole 55 is formed at the position at which the engaging part and the second screw hole 52 are superimposed. The second opening hole 55 composes a link mechanism when the base member 30 is fixed with screws. COPYRIGHT: (C)2007,JPO&INPIT
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