| CPC G03G 15/0806 (2013.01) [G03G 15/0808 (2013.01)] | 9 Claims |
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1. A developing unit comprising:
a developing roller;
a frame body of which a longitudinal direction is a rotation axis direction of the developing roller;
a bearing member attached to an end portion of the frame body in the rotation axis direction, the bearing member rotatably supporting an end portion of the developing roller in the rotation axis direction; and
an end portion member attached to the end portion of the frame body outside the bearing member in the rotation axis direction to sandwich the bearing member together with the frame body;
wherein one of the frame body and the end portion member includes a hole portion that is depressed in the rotation axis direction on a facing surface that faces the bearing member, and the other of the frame body and the end portion member includes a protruding portion that is inserted into the hole portion and extends in the rotation axis direction,
the protruding portion includes a first region and a second region that is provided at a position closer to a tip of the protruding portion than the first region is, the first region of the protruding portion being press-fitted into the hole portion, the second region being inserted into the hole portion with a gap between an outer peripheral surface of the protruding portion and an inner peripheral surface of the hole portion,
the frame body includes a communication hole that extends in a direction intersecting the rotation axis direction such that the gap leads to an outside of the frame body through the communication hole, and
at least a part of the communication hole and the gap are filled with an adhesive.
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