# US 12,181,806 B2 · Developing cartridge

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- Number: US 12,181,806 B2
- Document ID: US12181806B2
- Status: Granted
- Kind: B2
- Application number: 18/057,292
- Filed: 2022-11-21
- Published: 2023-03-16
- Granted: 2024-12-31
- Earliest claimed: 2019-03-26
- Assignees: Brother Kogyo Kabushiki Kaisha
- Applicants: Brother Kogyo Kabushiki Kaisha
- Inventors: Nao Itabashi
- Web page: https://patentgrep.com/patent/US12181806B2

## CPC

- G03G 15/0865: {Arrangements for supplying new developer}
- G03G 21/1821: {means for connecting the different parts of the process cartridge, e.g. attachment, positioning of parts with each other, pressure/distance regulation (G03G21/1825 takes precedence)}
- G03G 15/0808: {characterised by the developer supplying means, e.g. structure of developer supply roller}
- G03G 15/0889: {for agitation or stirring}
- G03G 21/1676: {for the developer unit}
- G03G 21/1842: {for guiding and mounting the process cartridge, positioning, alignment, locks (G03G21/1864 and G03G21/1871 take precedence)}
- G03G 21/1867: {for electrically connecting the process cartridge to the apparatus, electrical connectors, power supply}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A developing cartridge may include a developing roller, a casing capable of containing a developer therein, a developing electrode movable with the casing and the developing roller and pivotable about a developing roller shaft of the developing roller in a direction, a first lever movable relative to the casing, and a holder configured to hold the first lever relative to the casing, in case where the developing electrode pivots from one side of the direction to an other side of the direction, the first lever stops the pivotable movement of the developing electrode from one side of the direction to the other side of the direction and the holder prevents the first lever from coming off the holder from the one side of the direction to the other side of the direction.

## Claims

### Claim 1

A developing cartridge comprising:
a developing roller rotatable about an axis extending in a first direction;
a casing capable of containing a developer material, the developing roller being located at one end of the casing in a second direction that crosses the first direction; and
a first lever movable relative to the casing between a first position and a second position, the first lever including one end portion that functions as the point of effort, an other end portion that functions as the point of application, and a cam surface that is located between the one end portion and the other end portion and that functions as a pivot point,
wherein when the first lever moves around the cam surface serving as a central point from the first position to the second position in response to movement of the one end portion, the other end portion movable with the casing,
wherein the developing cartridge further comprises:
a holder configured to hold the first lever relative to the casing, and
wherein, the holder prevents the first lever from coming off the holder.

### Claim 2 (depends on 1)

The developing cartridge according to claim 1,
wherein the first lever is movable in a third direction, and
wherein the holder stops the movement of the first lever from one side of the third direction to an other side of the third direction.

### Claim 3 (depends on 2)

The developing cartridge according to claim 2,
wherein the one end portion of the first lever is far away from the other end portion of the first lever in the third direction,
wherein the one end portion of the first lever includes a first convex portion protruding in the first direction, and
wherein the holder stops movement of the first lever from the one side of the third direction to the other side of the third direction by contacting the holder with the first convex portion.

### Claim 4 (depends on 1)

The developing cartridge according to claim 1,
wherein the first lever is movable in a third direction,
wherein the first lever includes:
one end portion; and
an other end portion being far away from the one end portion in the third direction,
wherein the one end portion of the first lever includes a first convex portion protruding in the first direction, and
wherein the holder stops movement of the first lever from the one side of the third direction to the other side of the third direction by contacting the holder with the first convex portion.

### Claim 5 (depends on 1)

The developing cartridge according to claim 1,
wherein the developing cartridge is in connection with a drum cartridge including a photosensitive drum.