Contact image sensor unit including a detachable light guide supporting member and image reading apparatus using the same

An image reading apparatus comprising:

• a casing;
• and
• a contact image sensor unit;
• wherein said contact image sensor unit includes, a light source configured to illuminate an original, a rod-like light guide configured to guide light from said light source to the original, an imaging element configured to form reflected light from the original on a plurality of photoelectric conversion elements, a sensor substrate on which said plurality of photoelectric conversion elements are mounted, a frame to which said light source, said light guide, said imaging element, and said sensor substrate are attached and which has a positioning part for attaching said light guide thereto, and a plurality of supporting members which attachably/detachably and slidably support said light guide and are attachably/detachably attached to said positioning part, said plurality of supporting members supporting said light guide and said light guide being slidable in a main-scan direction.

A contact image sensor unit, comprising:

• a light source configured to illuminate an original;
• a rod-like light guide configured to guide light from said light source to the original;
• an imaging element configured to form reflected light from the original on a plurality of photoelectric conversion elements;
• a sensor substrate on which said plurality of photoelectric conversion elements are mounted;
• a frame to which said light source, said light guide, said imaging element, and said sensor substrate are attached and which has a positioning part for attaching said light guide thereto;
• and
• a plurality of supporting members which attachably/detachably and slidably support a portion in a longitudinal direction of said light guide and are attachably/detachably attached to said positioning part, said plurality of supporting members supporting said light guide and said light guide being slidable in a main-scan direction.