Developing cartridge for supplying power to a developer roller shaft when coupled to an image forming apparatus

A developing cartridge comprising:

• a case including a first sidewall and a second sidewall opposite to the first sidewall;
• a developing roller disposed between the first sidewall and the second sidewall, the developing roller including a developing roller shaft configured to rotate and a developing roller member configured to carry a developing agent thereon, the developing roller member being provided around the developing roller shaft, the developing roller shaft rotating about a first axis line;
• an electrode disposed on the first sidewall adjacent to the developing roller shaft, the electrode being electrically connected to the developing roller member;
• and
• a driven coupling disposed on the second sidewall, the driven coupling being configured to rotate about a second axis line,
• wherein at least a part of the electrode is disposed to intersect with the second axis line,
• wherein the electrode includes a portion attached to the first sidewall with a fixing member,
• wherein the fixing member includes a portion configured to prevent the electrode from separating from the first sidewall,
• wherein an end face of the portion of the electrode faces an end face of the portion of the fixing member, and
• wherein the first sidewall includes a receiving portion configured to allow the portion of the electrode to surround the receiving portion and to allow the fixing member to be inserted into the receiving portion, and an end face of the receiving portion is configured to protrude away from the end face of the portion of the electrode to contact the end face of the portion of the fixing member.

A developing cartridge, comprising:

• a case including a first sidewall and a second sidewall opposite to the first sidewall;
• a developing roller disposed between the first sidewall and the second sidewall, the developing roller including a developing roller shaft configured to rotate and a developing roller member configured to carry a developing agent thereon, the developing roller member being provided around the developing roller shaft, the developing roller shaft rotating about a first axis line;
• an electrode disposed on the first sidewall adjacent to the developing roller shaft, the electrode being electrically connected to the developing roller member;
• and
• a driven coupling disposed on the second sidewall, the driven coupling configured to rotate about a second axis line;
• and
• a supply roller configured to supply the developing agent to the developing roller, the supply roller being disposed parallel to the developing roller,
• wherein the supply roller includes a supply roller shaft configured to rotate, a supply roller member configured to supply the developing agent to the developing roller, the supply roller member being provided around the supply roller shaft, and a supply roller gear connected so as to rotate together with the supply roller shaft,
• wherein the electrode is electrically to the supply roller shaft,
• wherein the electrode has a first portion configured to surround a circumferential portion of the developing roller shaft and a second potion configured to surround a circumferential portion of the supply roller shaft,
• wherein the electrode has a contact portion disposed above the first portion and the second portion, and
• wherein
• a first line extends perpendicular to the first axis line and intersects at least a part of the driven coupling and the second axis line, and
• a second line extends perpendicular to the first axis line and intersects at least a part of the electrode and the second axis line.

A developing cartridge comprising:

• a case including a first sidewall and a second sidewall opposite to the first sidewall;
• a developing roller disposed between the first sidewall and the second sidewall, the developing roller including a developing roller shaft configured to rotate and a developing roller member configured to carry a developing agent thereon, the developing roller member being provided around the developing roller shaft, the developing roller shaft rotating about a first axis line;
• an electrode disposed on the first sidewall adjacent to the developing roller shaft, the electrode being electrically connected to the developing roller member;
• a driven coupling disposed on the second sidewall, the driven coupling configured to rotate about a second axis line,
• wherein
• a first line extends perpendicular to the first axis line and intersects at least a part of the driven coupling and the second axis line, and
• a second line extends perpendicular to the first axis line and intersects at least a part of the electrode and the second axis line,
• wherein the electrode includes a portion attached to the first sidewall with a fixing member,
• wherein the fixing member includes a portion configured to prevent the electrode from separating from the first sidewall, and
• wherein an end face of the portion of the electrode faces an end face of the portion of the fixing member, and
• wherein the first sidewall includes a receiving portion configured to allow the portion of the electrode to surround the receiving portion and to allow the fixing member to be inserted into the receiving portion, and an end face of the receiving portion is configured to protrude away from the end face of the portion of the electrode to contact the end face of the portion of the fixing member.

A developing cartridge, comprising:

• a case including a first sidewall and a second sidewall opposite to the first sidewall;
• a developing roller disposed between the first sidewall and the second sidewall, the developing roller including a developing roller shaft configured to rotate and a developing roller member configured to carry a developing agent thereon, the developing roller member being provided around the developing roller shaft;
• an electrode disposed on the first sidewall adjacent to the developing roller shaft, the electrode being electrically connected to the developing roller member;
• and
• a driven coupling disposed on the second sidewall;
• and
• a supply roller configured to supply the developing agent to the developing roller, the to the developing roller,
• wherein the supply roller includes a supply roller shaft rotate, a supply roller member configured to supply the developing agent to the developing roller, the supply roller member being provided around the supply roller shaft, and a supply roller gear connected so as to rotate together with the supply roller shaft,
• wherein the electrode is electrically connected to the supply roller shaft,
• wherein the electrode has a first portion configured to surround a circumferential portion of the developing roller shaft and a second portion configured to surround a circumferential portion of the supply roller shaft,
• wherein the electrode has a contact portion disposed above the first portion and the second portion, and
• wherein an area defined by a projection of the driven coupling on the first side wall encompasses at least a part of the electrode.

A developing cartridge comprising:

• a case including a first sidewall and a second sidewall opposite to the first sidewall;
• a developing roller disposed between the first sidewall and the second sidewall, the developing roller including a developing roller shaft configured to rotate and a developing roller member configured to carry a developing agent thereon, the developing roller member being provided around the developing roller shaft;
• an electrode disposed on the first sidewall adjacent to the developing roller shaft, the electrode being electrically connected to the developing roller member;
• and
• a driven coupling disposed on the second sidewall,
• wherein the electrode includes a portion attached to the first sidewall with a fixing member,
• wherein the fixing member includes a portion configured to prevent the electrode from separating from the first sidewall,
• wherein an end face of the portion of the electrode faces an end face of the portion of the fixing member,
• wherein the first sidewall includes a receiving portion configured to allow the portion of the electrode to surround the receiving portion and to allow the fixing member to be inserted into the receiving portion, and an end face of the receiving portion is configured to protrude away from the end face of the portion of the electrode to contact the end face of the portion of the fixing member.

A developing cartridge comprising:

• a case including a first sidewall and a second sidewall opposite to the first sidewall;
• a developing roller disposed between the first sidewall and the second sidewall, the developing roller including a developing roller shaft configured to rotate and a developing roller member configured to carry a developing agent thereon, the developing roller member being provided around the developing roller shaft;
• and
• an electrode disposed on the first sidewall adjacent to the developing roller shaft, the electrode being electrically connected to the developing roller member, the electrode including
• a portion attached to the first sidewall with a fixing member, wherein the fixing member includes a portion configured to prevent the electrode from separating from the first sidewall, and wherein an end face of the portion of the electrode faces an end face of the portion of the fixing member,
• wherein the first sidewall includes a receiving portion configured to allow the portion of the electrode to surround the receiving portion and to allow the fixing member to be inserted into the receiving portion, and an end face of the receiving portion is configured to protrude away from the end face of the portion of the electrode to contact the end face of the portion of the fixing member.