Developer container for detecting developer amount based on capacitance, developing apparatus, process cartridge, and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsTaku Watanabe, Masahito Kato, Go Shindo, Atsushi Toda, Katsuichi Abe, Motonari Ito, Akira Suzuki, Junichi Matsumura, Naoki Matsumaru
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Abstract
A developer container including a frame configured to define a developer containing portion, a first electrode, and a second electrode arranged on a surface of the frame and having a surface opposed to the first electrode, a developer amount in the developer containing portion being detected based on a capacitance between the first electrode and the second electrode.
Claims17
A developer container configured to contain a developer, the developer container comprising an antenna member configured to detect a developer amount by use of a capacitance, wherein the antenna member comprises a conductive resin member having a resistance of 103Ω or more and 105Ω or less.
A developer container, comprising:
- a frame configured to define a developer containing portion;
- a first electrode;
- and
- a second electrode which is arranged on a surface of the frame and which has a surface opposed to the first electrode,
- wherein a developer amount in the developer containing portion is detected based on a capacitance between the first electrode and the second electrode,
- the second electrode is constituted by a conductive resin member,
- a closest point, in which the second electrode is closest to the first electrode, on the second electrode is located in a position other than an end portion of the second electrode as viewed along an axial direction of the first electrode,
- the second electrode has at least one convex portion protruding toward the first electrode, and
- the closest point is located on the at least one convex portion.
Dependencies are inferred from the claim text.