ILLUMINATING DEVICE, IMAGE READING DEVICE, AND IMAGE FORMING DEVICE INCLUDING THE ILLUMINATING DEVICE AND THE IMAGE READING DEVICE

摘要

In an image forming device, a light-guiding member includes an integrated ridge extending in the longitudinal direction of the light-guiding member. The light-guiding member further includes a protrusion on the ridge. The illuminating device includes an attachment recess that holds the light-guiding member and a holder member that has a fit portion to which a protrusion is fitted. The protrusion is disposed at a position decentered to one end portion of the light-guiding member in the longitudinal direction of the light-guiding member.

主权项

1. An illuminating device, comprising:
a light-emitting device that emits light; and a light-guiding member that is adjacent to the light-emitting device and guides the light from the light-emitting device to a light emerging surface from which the light is projected on a subject; wherein the light emerging surface extends in a longitudinal direction of the light-guiding member; and the light-guiding member includes a ridge which is integrally provided together with the light-guiding member as a single monolithic element.