| 主权项 |
1. A developing cartridge comprising:
a developing roller having an axis extending in an axial direction; a first frame including a toner accommodating portion and a developing roller support portion, the toner accommodating portion having an edge portion extending in a first direction perpendicular to the axial direction, the developing roller support portion supporting the developing roller and being in communication with the toner accommodating portion, the first frame comprising:
a first melt-bonding surface extending along the edge portion of the toner accommodating portion; anda second melt-bonding surface positioned closer to the developing roller than the first melt-bonding surface to the developing roller, the second melt-bonding surface forming an obtuse angle with the first melt-bonding surface, the obtuse angle being equal to or greater than 120° and smaller than 180°; and a second frame covering the toner accommodating portion and the developing roller support portion and melt-bonded to the first frame, the second frame comprising:
a first wall having a third melt-bonding surface melt-bonded to the first melt-bonding surface, the third melt-bonding surface extending in parallel to the first melt-bonding surface;a second wall having a fourth melt-bonding surface melt-boned to the second melt-bonding surface, the fourth melt-bonding surface extending in parallel to the second melt-bonding surface; anda protruding portion having a surface intersecting the fourth melt-bonding surface, the protruding portion protruding in the first direction from the second wall toward the developing roller. |
