Patent ID: 7929900

Claim:
A waste toner cartridge comprising: a housing having a first lateral wall, a second lateral wall adjoined with the first lateral wall, a bottom wall recessed from the first lateral wall and adjoined with the second lateral wall, and a periphery wall integrally connected with the first lateral wall and the bottom wall so as to define an accommodation recess between the bottom wall and the periphery wall; said periphery wall having a flange protruding toward the accommodation recess and provided with an arc section and two restricting sections respectively extending from two ends of the arc section; and a plug having a head portion, a body portion axially extending from the head portion and received in the accommodation recess of the housing and located near the arc section of the flange of the periphery wall of the housing, and an anchor portion axially extending from a distal end of the body portion; wherein the body portion of the plug has an outer diameter larger than a distance defined between the restricting sections of the flange of the periphery wall of the housing, and the anchor portion of the plug has a radius larger than a radius of curvature of the arc section of the flange of the periphery wall of the housing.