Driving device and image forming apparatus

摘要

A clutch mechanism used in a system in which first and second driven members are driven using one driving source. The mechanism includes a driving member, a driving side engaging member, an idler side engaging member, an urging unit, a releasing member provided with a cam surface configured to cause the driving side engaging member to move axially, and to perform engagement or release of the driving side engaging member with or from the idler side engaging member, and a cam member provided with a cam surface configured to engage with the cam surface of the releasing member. In at least one of the releasing member and the cam member, at least a portion where collision occurs when the releasing member has moved in an axial direction to approach the cam member, is formed of an elastic member.

主权项

1. A clutch mechanism used in a system in which a driving source rotationally drives a first driven member and a second driven member, and configured to couple or release a drive to the second driven member, the clutch mechanism comprising:
a driving member configured to transmit a drive from the driving source to a rotating shaft on an idler side; a driving side engaging member configured to rotate in synchronization with the driving member, and to be movable in an axial direction; an idler side engaging member fixed to a rotating shaft on an idler side, and configured to engage with the driving side engaging member; an urging unit configured to urge the driving side engaging member in a direction in which the driving side engaging member meshes with the idler side engaging member; a releasing member provided with a cam surface configured to cause the driving side engaging member to move axially, and to perform engagement or release of the driving side engaging member with or from the idler side engaging member; and a cam member provided with a cam surface configured to engage with the cam surface of the releasing member, an elastic member provided at least at a portion where collision occurs when the releasing member has moved in an axis direction to approach the cam member, in at least one of the releasing member and the cam member.