摘要:
A drive transmission mechanism transmits a drive force to a processing unit that is in contact with an image bearing member to work on the image bearing member. The mechanism includes a supporting member that supports the processing unit. The supporting member is pivotally movable. The mechanism further includes a driving force receiving portion provided on the supporting member for receiving a driving force for reciprocating the processing unit in a longitudinal direction of the image bearing member, from a driving force imparting member, and a regulating member that regulates the pivotal movement of the supporting member.