| 摘要 |
PROBLEM TO BE SOLVED: To prevent the whole of an optical box from being deformed due to distortion generated in an installation area with heat generated in driving means.SOLUTION: An optical box 201 which houses light source units 202Y, 202M, 202C and 202Bk, a polygon mirror 203, and a motor 203m includes a connection area 201J formed between a second side wall 62 and an installation area S, and areas 201m, 201n adjacent to the connection area 201J and different in height. The connection area 201 includes a recess 201Ja. |
