Patent ID: 6779725
Filing Date: 2004-08-24
Classification: H04N

Abstract:
An image reader comprising:a light source configured to illuminate an original; an optical guide system configured to guide a light beam reflected from the original and to convey information about an image on the original; a light-receiving unit configured to receive the light beam guided by the optical guide system and to convert the information about the image into electric signals; a stay member holding the light-receiving unit; a balance weight configured to act on the stay member and to reduce oscillation of the light-receiving unit; and a balance-weight holding structure configured to hold the balance weight in an unrestrained state relative to the stay member, the balance-weight holding structure comprising pins disposed in holes defined by the balance weight, lengths of the pins being greater than a thickness of the balance weight to provide a first air gap between the stay member and the balance weight, and diameters of the pins being less than diameters of the holes to provide second air gaps between the pins and inner faces of the holes.