Image-capturing unit and image-capturing apparatus

An image-capturing unit for capturing image information from documents on an image-capturing platen, the image-capturing unit comprising:

• a light source for irradiating documents with light;
• a mirror group composed of a plurality of mirrors, for reflecting light reflected from a document;
• a final mirror for reflecting light reflected by said mirror group;
• a lens for condensing light incident on said lens via the final mirror;
• an image sensor for photoelectrically converting light condensed on said sensor by said lens;
• a sensor board on which said image sensor is mounted;
• and
• a synthetic-resin frame into which said light source, said mirror group, said lens, and said sensor board are mounted;
• wherein
• said frame includes
• a first frame having a plate and sidewalls extending from said plate, said first frame having a space inside surrounded by said plate and sidewalls and whose side opposite said plate is open, and
• a second frame for covering the side of said first frame opposite said plate;
• a light-source anchoring portion is formed on a document side of said plate of said first frame, for anchoring said light source, and said light source is anchored along the document side of said first-frame plate to said light-source anchoring portion;
• a lens support member supporting said lens, said lens as supported by said lens support member, and said sensor board on which said image sensor is mounted are each mounted on the side of said first-frame plate reverse from the document side;
• said light source is disposed along one edge of said first frame with respect to said lens, and said sensor board is disposed on an opposite edge of said first frame with respect to said lens;
• and
• a mirror support member, formed either on the reverse side of said plate, or on one of said sidewalls, of said first frame, for supporting said mirror group from more toward said second frame than is said lens.