Patent ID: 7941072
Filing Date: 2011-05-10
Classification: G03G,Y10T

Abstract:
1. A cartridge comprising: a casing; a first gear rotatably provided at the casing; a second gear including a toothed portion and a toothless portion, the toothed portion being provided on a part of an outer periphery of the second gear and configured to mesh with the first gear, and the toothless portion being provided on a remaining part of the outer periphery of the second gear and configured to be free from meshing with the first gear; and a storing portion formed at the casing and configured to store the second gear, the storing portion including an inner peripheral surface that faces the second gear, wherein the second gear comprises an arm that is flexible and extends substantially along a peripheral direction of the second gear, wherein the inner peripheral surface includes a bulging portion that bulges inward in a radial direction of the second gear and is allowed to contact an end portion of the arm, wherein the bulging portion has a peak portion that is closest to a rotation center of the second gear, wherein the arm moves in association with a rotation of the second gear in one direction and is deflected while the arm contacts the bulging portion, wherein a change tendency of deflection amounts of the arm is changed from an increasing tendency to a decreasing tendency at the peak portion as a base point, and wherein the toothed portion of the second gear is separated from the first gear when the end portion of the arm has crossed over the peak portion of the bulging portion in the one direction.