Transfer belt unit and image forming apparatus having the same

摘要

A transfer belt unit and an image forming apparatus having the same are provided. The transfer belt unit includes a transfer belt circulating and traveling and transferring a toner image formed on a photosensitive body onto a printable medium. A plurality of support rollers support an inner circumference of the transfer belt. A pair of belt guides respectively attached to both edges of the inner circumference of the transfer belt are engaged with a regulating portion disposed in the support rollers to allow the transfer belt to travel in a substantially straight line and each having a joint portion. The joint portion comprises first and second ends separated from each other to be substantially parallel to each other when inclined with respect to a traveling direction of the transfer belt. The second end is located in a posterior position of the first end with respect to the traveling direction of the transfer belt and an external edge of the second end is chamfered.