Patent ID: 8737882
Filing Date: 2014-05-27
Classification: F16D,G03G

Abstract:
1. A driving force transmission mechanism, comprising a photosensitive drum driving member, wherein the photosensitive drum driving member engaged with an image forming apparatus driving member to transmit the driving force; the image forming apparatus comprising: a triangular groove having a triangular cross-section and driving force transmission portion disposed in three vertex angles of the triangular groove; the photosensitive drum driving member comprising a non-distorting protrusion axially extended from the end face of a drum shaft and engaged with the groove on the image forming apparatus driving member; the protrusion having a position-limiting mechanism and a stressed mechanism; wherein the position-limiting mechanism and the stressed mechanism are disposed at different positions; and wherein a projecting tooth obliquely disposed on the non-distorting protrusion is taken as the stressed mechanism; and the projecting tooth also having a mating surface engaged with the driving force transmission portion to transmit the driving force; wherein a supporting disc and two protruding columns are disposed on the protrusion; the protruding columns are symmetrically distributed on both sides of the protrusion; a first protruding column is a projecting tooth engaged with the driving force transmission component; a second protruding column makes contact with an inner wall of the groove; the first protruding column is taken as the stressed mechanism; and the position-limiting mechanism comprises the supporting disc and the second protruding column.