Image reading apparatus, and its manufacturing method

An image reader comprising:

• a light source;
• a light guide member elongated in a primary scanning direction for directing light from the light source to an object to be read as linear light extending in the primary scanning direction;
• a first and a second reflectors elongated in the primary scanning direction and sandwiching the light guide member;
• a plurality of light receiving elements arranged in the primary scanning direction for receiving light reflected by the object to be read;
• and
• a case formed with an opening for inserting the light guide member and the first and the second reflectors in an insertion direction which is perpendicular to both of the primary scanning direction and a secondary scanning direction;
• wherein the first reflector is located deeper in the case in the insertion direction than the second reflector is, with the light guide member intervening between the first and the second reflectors;
• and
• the image reader further comprising:
• a first fitting contrivance for positioning the first reflector relative to the case by inserting the first reflector into the case in the insertion direction;
• a second fitting contrivance for positioning the light guide member relative to the case by inserting the light guide member into the case in the insertion direction;
• and
• a third fitting contrivance for positioning the second reflector relative to the case by inserting the second reflector into the case in the insertion direction.