Developing cartridge and method for manufacturing the same

摘要

A developing cartridge is provided. The developing cartridge includes a first frame and a second frame and a layer thickness regulating member. The first frame and the second frame include a first welding surface formed at a periphery of the developer accommodating part correspondingly to a developer accommodating part; and a second welding surface extending continuously from the first welding surface correspondingly to a roller support part. The first welding surface extends in a direction orthogonal to an overlapping direction of the first frame and the second frame. The second welding surface extends to be inclined toward a side of the first frame in the overlapping direction as extending toward the developing roller. The layer thickness regulating member is provided to cover the second welding surface from a side of the second frame in the overlapping direction.

主权项

1. A developing cartridge comprising:
a developing roller having a shaft extending in a first direction; a supply roller; a developing roller layer thickness regulating member including:
a blade member extending in the first direction and a second direction that is orthogonal to the first direction, a first end portion of the blade member in the second direction being in contact with a surface of the developing roller; anda support member supporting the blade member, the support member including a first support portion extending in the second direction and supporting a second end portion of the blade member in the second direction, and a second support portion extending in a third direction that is orthogonal to the first direction and the second direction; a first frame including:
a pair of first welding surfaces; anda pair second welding surfaces, one of the pair of second welding surfaces extending from one of the pair of first welding surfaces and inclined downwardly with respect to the one of the pair of first welding surfaces in the third direction, the one of the pair of second welding surfaces being positioned between the first support portion and the one of the pair of first welding surfaces in the third direction, other of the pair of second welding surfaces extending from other of the pair of first welding surfaces and inclined downwardly with respect to the other of the pair of first welding surfaces in the third direction, the other of the pair of second welding surfaces being positioned between the first support portion and the other of the pair of first welding surfaces in the third direction, and each of the pair of second welding surfaces extending toward the surface of the developing roller; and a second frame including:
a air of welding surfaces, one of the pair of third welding surfaces being welded with one of the pair of first welding, and the other of the pair of third welding surfaces being welded with the other of the pair of first welding surfaces; anda pair of fourth welding surfaces, one of the pair of fourth welding surfaces being welded with one of the pair of second welding surfaces and the one of the pair of fourth welding surfaces inclined downwardly with respect to one of the pair of third welding surfaces in the third direction, the other of the pair of fourth welding surfaces being welded with the other of the second welding surfaces, and the other of the pair of fourth welding surfaces inclined downwardly with respect to the other of the pair of third welding surfaces in the third direction, the one of the pair of fourth welding surfaces being positioned between the first support portion and the one of the pair of third welding surfaces in the third direction, the other of the pair of fourth welding surfaces being positioned between the first support portion and the other of the pair of third welding surfaces in the third direction, each of the pair of fourth welding surfaces extending toward the surface of the developing roller, wherein the second supporting portion extends from the first supporting portion toward the pair of fourth welding surfaces, wherein the pair of second welding surfaces is inclined downward toward a rear of the developing cartridge, wherein, from a side view of the developing cartridge in the first direction, the one of the pair of second welding surfaces begins to incline downwardly from the one of the pair of first welding surfaces at a position not above the supply roller in the third direction and the one of the pair of second welding surfaces ends at the developing roller layer thickness regulating member above the supply roller in the third direction, wherein, from a side view of the developing cartridge in the first direction, the other of the pair of second welding surfaces begins to incline downwardly from the other of the pair of first welding surfaces at position not above the supply roller in the third direction and the other of the pair of second welding surfaces ends at the developing roller layer thickness regulating member above the supply roller in the third direction, wherein the one of the pair of fourth welding surfaces ends at the developing roller layer thickness regulating member, and wherein the other of pair of fourth welding surfaces ends at the developing roller layer thickness regulating member.