Illuminating device, image reading apparatus and image forming apparatus

摘要

An illuminating device (210) according to an embodiment of the invention included in an image reading apparatus (100) and an image forming apparatus (D) includes light source portions (211a1), (211b1), (211a2) and (211b2), light-guiding members (213a) and (213b) for illuminating an illumination target (G) from an elongated light emitting face (M) that extends in a longitudinal direction (Y), by guiding light from the light source portions, and holding members (216a) and (216b) for holding the light-guiding members. The holding members include holding portions (2161a) and (2161b) for removably holding the light-guiding members, and tilted portions (2162a) and (2162b) that reflect light emitted from the light emitting face (M), the tilted portions extending from a front end on the light emitting face (M) side of the holding portions, obliquely widening with increasing distance from the light-guiding members.

主权项

1. An illuminating device comprising:
a light-emitting element; a substrate on which the light-emitting element is mounted; and a light-guiding member which guides light from the light-emitting element via a longitudinal end face of the light-guiding member and thereby illuminates an illumination target from a light emitting face that extends in a longitudinal direction of the light-guiding member, wherein the illuminating device further comprises:
a first radiator member arranged so as to be opposite to a light-emitting element-mounted surface side of the substrate; anda second radiator member arranged in contact with a surface opposite to the light-emitting element-mounted surface of the substrate and the first radiator member, wherein the first radiator member is provided with a through hole for passing the light from the light-emitting element to the end face of the light-guiding member.