Patent ID: 9291993
Filing Date: 2016-03-22
CPC Classification: G03G

Claim Text:
1. A drive transmission mechanism comprising: a driving side coupling member for transmitting a rotational force; and a holder member for holding said driving side coupling member, said driving side coupling member being provided with a first engaging portion, said holder member being provided with a second engaging portion which is capable of engaging with said first engaging portion when said driving side coupling member is in a first rotation angular position relative to said holder member, said driving side coupling member being further provided with a first operating portion, said holder member being further provided with a second operating portion for rotating said driving side coupling member when contacting said first operating portion, said driving side coupling member being movable along a rotational axial direction thereof between (1) a projected position projected from said holder member, (2) a retracted position retracted toward said holder member and (3) a middle position between the projected position and the retracted position, wherein when said first engaging portion and said second engaging portion are engaged with each other, said driving side coupling member is held in the middle position to be prevented from moving from the middle position to the projected position, wherein when said driving side coupling member is moved from the middle position toward the retracted position, the first operating portion and the second operating portion contact each other so that said driving side coupling member rotates relative to said holder member to a second rotation angular position where said first engaging portion and said second engaging portion are disengaged from each other, and wherein by said driving side coupling member rotating from the first rotation angular position to the second rotation angular position, said driving side coupling member is enabled to move to the projected position.