Light-guide plate, area light source apparatus, and image reading apparatus

摘要

An LED module is mounted on a case frame by fitting three pins formed at a concave portion of the case frame, into holes in the LED module corresponding to the pins. A light-guide plate is fitted into the case frame formed integrally with a bottom cover in a descending direction. The light-guide plate is fixed by a hook provided for the case frame. A space between the light-guide plate and the LED module is prevented by pressing the light-guide plate to the LED module with a pressing spring. Since the light-guide plate is fitted into the case frame in the descending direction and a light scattering sheet is adhered to an outer end surface of the case frame in the descending direction, it is not necessary to reverse the worked product and so the number and time of working processes can be saved.