| 摘要 |
PROBLEM TO BE SOLVED: To suppress operation failure of a transmission member which is caused by a viscous material.SOLUTION: In a drive transmission device, a transmission member 55 moves along rotation axis direction of an input member 54, capable of moving to a position for engagement with an output member 53 and to a position for no engagement. While the input member 54 is rotating in a first direction, the transmission member 55 engages with the output member 53 to rotate the output member 53. While the input member 54 is rotating in a second direction opposite to the first direction, the transmission member 55 does not engage with the output member 53. Between the output member 53 and the transmission member 55, there is provided a gap in which a viscous material 73 is packed, and the output member 53 is provided with a hole 74 which communicates with the gap. |
