Patent ID: 9176435
Filing Date: 2015-11-03
Classification: G03G

Abstract:
1. A belt unit used for an image forming apparatus, the belt unit comprising: a rotatable endless belt; a drive roller; an urging member; a tension roller that is one of a plurality of rollers to stretch the belt and is pressed from an inner periphery to an outer periphery side of the belt by the urging member and configured to apply tension to the belt, wherein the tension roller is a roller disposed at a farthest position from the drive roller among the plurality of rollers; and a contact and separation unit configured to switch a position of the tension roller to a contact position to come into contact with the inner surface of the belt, or a separate position for separating from the inner surface of the belt, wherein, the contact and separation unit comprises a shock-absorbing member and a regulating member configured to regulate the position of the tension roller in an urged direction, and wherein, in a case where moving a position of the tension roller from the separation position to the contact position, the regulating member moves and the shock-absorbing member reduces the movement speed of the regulating member by making contact with the regulating member.