Frame, cartridge, image forming apparatus, and method for manufacturing frame
AssigneeCanon Kabushiki Kaisha
InventorsDaisuke Makiguchi, Naoki Matsumaru, Go Torii
Life of this patent
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Abstract
A first supporting member includes a first engaging portion and a second engaging portion that respectively engage with a first engaged portion and a second engaged portion that are provided in a second supporting member. The first engaging portion and the second engaging portion are configured to apply force in directions opposite to the directions in which the first engaged portion and the second engaged portion move when an opening opens.
Claims12
A frame of a cartridge that is detachably attached to an apparatus body of an image forming apparatus, the frame comprising:
- a bearing having an inner surface, by which a roller is to be rotatably supported, and an outer surface opposite to the inner surface, the bearing having a first engaging portion and a second engaging portion that protrude from the outer surface;
- and
- a bearing supporter including a hole into which the bearing is fitted, the hole having a break from which the outer surface is partially exposed, the bearing supporter including a first engaged portion and a second engaged portion that engage with the first engaging portion and the second engaging portion, respectively, wherein the first engaged portion and the second engaged portion are arranged opposite to each other across a virtual straight line crossing both a center of rotation of the roller and a midpoint of the break in a rotating direction of the roller when viewed in an axial direction of the roller.
A method for manufacturing a frame of a cartridge that is detachably attached to an apparatus body of an image forming apparatus, the frame including a bearing having an inner surface, by which a roller is to be rotatably supported, and an outer surface opposite to the inner surface, and a bearing supporter including a hole, into which the bearing is fitted, with a break, the bearing supporter including a first engaged portion and a second engaged portion, wherein the first engaged portion and the second engaged portion are arranged opposite to each other across a virtual straight line crossing both a center of rotation of the roller and a midpoint of the break in a rotating direction of the roller when viewed in an axial direction of the roller, the method comprising:
- a first step of preparing the bearing supporter;
- a second step of bringing a mold into contact with the bearing supporter and injecting a molten resin into a space formed between the bearing supporter and the mold to form the bearing,
- wherein, in the second step, the bearing is formed so that the outer surface of the bearing is exposed partially from the break of the bearing supporter, and
- wherein, in the second step, a first engaging portion, which protrudes from the outer surface of the bearing portion and engages with the first engaged portion, is formed of a resin injected into a space formed between the first engaged portion and the mold, and a second engaging portion, which protrudes from the outer surface of the bearing portion and engages with the second engaged portion, is formed of a resin injected into a space formed between the second engaged portion and the mold.
Dependencies are inferred from the claim text.