Patent ID: 8693066

Claim:
An image reading device, comprising: an optical part, comprises: a linear light source, extending long in a first direction; and a lens array, enabling light to converge on the light receiving component; a case having an accommodating portion for accommodating the optical part, the accommodating portion comprises: a lens accommodating portion for accommodating the lens array; and a light source accommodating portion for accommodating the linear light source, the light source accommodating portion comprises: a strip-shaped bottom surface overlapping with the linear light source when viewed from a third direction orthogonal to the first direction and a second direction; and a strip-shaped plane adjacent to the strip-shaped bottom surface in the second direction and not overlapping with the linear light source when view from the third direction; and a light receiving component accommodated in the case; wherein the optical part is fixed in the accommodating portion through a first adhesive and a second adhesive, a hardening time of the second adhesive is longer than a hardening time of the first adhesive, the strip-shaped s lane is coated with the first adhesive, and the strip-shaped bottom surface is coated with the second adhesive.