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US 10,310,412 B2Granted
Developing apparatus, cartridge, and image forming apparatus for suppressing developer leakage of a frame
AssigneeCanon Kabushiki Kaisha
InventorsMakoto Fukatsu, Yuta Isobe, Shunsuke Mizukoshi
Life of this patent
Estimating the term…
Abstract
A developing apparatus, a cartridge, and an image forming apparatus in which, in a longitudinal direction, an edge portion of a carrying portion is disposed so as to be positioned outside an inner edge portion of an edge portion sealing member, and inside an outer edge portion of the edge portion sealing member. An edge portion of the restricting member is disposed so as to be positioned outside the edge portion of the carrying portion, and inside the outer edge portion of the edge portion sealing member.
Claims45
A developing apparatus comprising:
- a developer carrying member that includes a carrying portion that carries developer;
- a developing frame that stores the developer carried by the developer carrying member, the developing frame rotatably supporting the developer carrying member at an edge portion of the developer carrying member in a longitudinal direction;
- a restricting member disposed in the longitudinal direction, the restricting member restricting a thickness of the developer carried on the carrying portion,
- wherein the restricting member includes a supporting member, and an elastic member attached to the supporting member, and
- wherein the elastic member restricts the thickness of the developer carried on the carrying portion by abutting against the carrying portion;
- and
- an edge portion sealing member disposed between the edge portion of the developer carrying member and an edge portion of the developing frame that supports the edge portion of the developer carrying member, the edge portion sealing member restricting leakage of the developer in the edge portion of the developing frame,
- wherein in the longitudinal direction, an edge portion of the carrying portion is disposed so as to be positioned outside an inner edge portion of the edge portion sealing member, and inside an outer edge portion of the edge portion sealing member, and
- wherein an edge portion of the restricting member is disposed so as to be positioned outside the edge portion of the carrying portion, and inside the outer edge portion of the edge portion sealing member.
6 more elements
A developing apparatus comprising:
- a developer carrying member that includes a carrying portion that carries developer;
- a developing frame that stores the developer carried by the developer carrying member, the developing frame rotatably supporting the developer carrying member at an edge portion of the developer carrying member in a longitudinal direction;
- a restricting member disposed in the longitudinal direction, the restricting member restricting a thickness of the developer carried on the carrying portion,
- and
- an edge portion sealing member disposed between the edge portion of the developer carrying member and an edge portion of the developing frame that supports the edge portion of the developer carrying member, the edge portion sealing member restricting leakage of the developer in the edge portion of the developing frame,
- wherein in the longitudinal direction, an edge portion of the carrying portion is disposed so as to be positioned outside an inner edge portion of the edge portion sealing member, and inside an outer edge portion of the edge portion sealing member,
- wherein an edge portion of the restricting member is disposed so as to be positioned outside the edge portion of the carrying portion, and inside the outer edge portion of the edge portion sealing member,
- wherein the restricting member includes a fixed end fixed to the developing frame, and a free end capable of abutting against the carrying portion,
- wherein in a rotation direction of the developer carrying member, an edge face of the free end is disposed upstream of a contact position in which the restricting member and the carrying portion abut against each other,
- wherein the restricting member includes
- a first portion that has a first length in an orthogonal direction that is orthogonal to the longitudinal direction, the first portion being positioned on an edge portion side in the longitudinal direction, and
- a second portion that has a second length in the orthogonal direction longer than the first length, the second portion being positioned inside with respect to the edge portion side in the longitudinal direction,
- wherein the edge portion sealing member is in contact with the first portion of the restricting member, and is not in contact with the second portion, and
- wherein in the longitudinal direction, an edge portion corresponding to the first portion of the restricting member is disposed so as to be positioned outside of the edge portion of the carrying portion and inside the outer edge portion of the edge portion sealing member.
11 more elements
A developing apparatus comprising:
- a developer carrying member that includes a carrying portion that carries developer;
- a developing frame that stores the developer carried by the developer carrying member, the developing frame rotatably supporting the developer carrying member at an edge portion of the developer carrying member in a longitudinal direction;
- a restricting member disposed in the longitudinal direction, the restricting member restricting a thickness of the developer carried on the carrying portion, and
- an edge portion sealing member disposed between the edge portion of the developer carrying member and an edge portion of the developing frame that supports the edge portion of the developer carrying member, the edge portion sealing member restricting leakage of the developer in the edge portion of the developing frame,
- wherein in the longitudinal direction, an edge portion of the carrying portion is disposed so as to be positioned outside an inner edge portion of the edge portion sealing member, and inside an outer edge portion of the edge portion sealing member,
- wherein an edge portion of the restricting member is disposed so as to be positioned outside the edge portion of the carrying portion, and inside the outer edge portion of the edge portion sealing member,
- wherein the developer carrying member includes a cylindrical base,
- wherein the carrying portion is provided on an outer peripheral surface of the base, and is formed of a carrying layer capable of carrying the developer, and
- wherein the developer carrying member includes a magnet roller inserted in the base.
6 more elements
A cartridge comprising:
- an image carrying member on which an electrostatic latent image is formed;
- and
- a developing apparatus that develops the electrostatic latent image formed on the image carrying member including,
- a developer carrying member that includes a carrying portion that carries developer,
- a developing frame that stores the developer carried by the developer carrying member, the developing frame rotatably supporting the developer carrying member at an edge portion of the developer carrying member in a longitudinal direction,
- a restricting member disposed in the longitudinal direction, the restricting member restricting a thickness of the developer carried on the carrying portion,
- wherein the restricting member includes a supporting member, and an elastic member attached to the supporting member, and
- wherein the elastic member restricts the thickness of the developer carried on the carrying portion by abutting against the carrying portion;
- and
- an edge portion sealing member disposed between the edge portion of the developer carrying member and an edge portion of the developing frame that supports the edge portion of the developer carrying member, the edge portion sealing member restricting leakage of the developer in the edge portion of the developing frame,
- wherein in the longitudinal direction, an edge portion of the carrying portion is disposed so as to be positioned outside an inner edge portion of the edge portion sealing member, and inside an outer edge portion of the edge portion sealing member, and
- wherein an edge portion of the restricting member is disposed so as to be positioned outside the edge portion of the carrying portion, and inside the outer edge portion of the edge portion sealing member.
9 more elements
An image forming apparatus comprising:
- an image carrying member on which an electrostatic latent image is formed;
- and
- a developing apparatus that develops the electrostatic latent image formed on the image carrying member including,
- a developer carrying member that includes a carrying portion that carries developer,
- a developing frame that stores the developer carried by the developer carrying member, the developing frame rotatably supporting the developer carrying member at an edge portion of the developer carrying member in a longitudinal direction,
- a restricting member disposed in the longitudinal direction, the restricting member restricting a thickness of the developer carried on the carrying portion,
- wherein the restricting member includes a supporting member, and an elastic member attached to the supporting member, and
- wherein the elastic member restricts the thickness of the developer carried on the carrying portion by abutting against the carrying portion;
- and
- an edge portion sealing member disposed between the edge portion of the developer carrying member and an edge portion of the developing frame that supports the edge portion of the developer carrying member, the edge portion sealing member restricting leakage of the developer in the edge portion of the developing frame,
- wherein in the longitudinal direction, an edge portion of the carrying portion is disposed so as to be positioned outside an inner edge portion of the edge portion sealing member, and inside an outer edge portion of the edge portion sealing member, and
- wherein an edge portion of the restricting member is disposed so as to be positioned outside the edge portion of the carrying portion, and inside the outer edge portion of the edge portion sealing member.
9 more elements
Dependencies are inferred from the claim text.