Developing cartridge

A developing cartridge for developing a latent image formed on a photosensitive member, wherein said developing cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus, said developing cartridge comprising:

• a cartridge frame;
• a developing roller for developing, with toner, the latent image formed on the photosensitive member of the main assembly of the apparatus, when said cartridge is mounted to the main assembly of the electrophotographic image forming apparatus;
• a first projected portion outwardly projected from said cartridge frame portion adjacent one longitudinal end of said developing roller, wherein said first projected portion is supported by a first supporting member provided in the main assembly of the apparatus when said cartridge is mounted to the main assembly;
• a second projected portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing roller, wherein said second projected portion is supported by a second supporting member provided in the main assembly of the apparatus when said cartridge is mounted to the main assembly;
• a first urging force receptor portion outwardly projected from said cartridge frame portion adjacent said one longitudinal end of said developing roller, wherein said first urging force receptor portion receives an urging force by a first elastic member provided in the main assembly when said cartridge is mounted to the main assembly;
• a second urging force receptor portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing roller, wherein said second urging force receptor portion receives an urging force by a second elastic member provided in the main assembly when said cartridge is mounted to the main assembly;
• a first contact portion outwardly projected from said cartridge frame portion adjacent said one longitudinal end of said developing roller, wherein said first contact portion contacts a first fixed portion provided in the main assembly when said cartridge is mounted to the main assembly;
• a second contact portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing roller, wherein said second contact portion contacts a second fixed portion provided in the main assembly when said cartridge is mounted to the main assembly;
• and
• a driving force receptor member for receiving, from the main assembly, a driving force for rotating said developing roller when said cartridge is mounted to the main assembly, wherein said driving force receptor member is exposed from said cartridge frame portion adjacent one longitudinal end of said developing roller,
• wherein as seen in the longitudinal direction of said developing roller, said first urging force receptor portion is disposed such that an angle formed between a first line connecting a center of rotation of said developing roller and a center of rotation of a driving force reception member and a second line connecting a portion of said first urging force receptor portion and the center of rotation of said driving force reception member, is 100-130 degrees, and said driving force reception member receives a driving force for rotating said developing roller when said developing cartridge is mounted to the main assembly, said second urging force receptor portion is disposed such that an angle formed between a first line connecting a center of rotation of said developing roller and a center of rotation of a driving force reception member and a line connecting a portion of said second urging force receptor portion and the center of rotation of said driving force reception member, is 100-130 degrees, and said driving force reception member receives a driving force for rotating said developing roller when said developing cartridge is mounted to the main assembly.

A developing cartridge for developing a latent image formed on a photosensitive member, wherein said developing cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus, said developing cartridge comprising:

• a cartridge frame;
• a developing roller for developing, with toner, the latent image formed on the photosensitive member of the main assembly of the apparatus, when said cartridge is mounted to the main assembly of the electrophotographic image forming apparatus;
• a first projected portion outwardly projected from said cartridge frame portion adjacent one longitudinal end of said developing roller, wherein said first projected portion is supported by a first supporting member provided in the main assembly of the apparatus when said cartridge is mounted to the main assembly;
• a second projected portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing means, wherein said second projected portion is supported by a second supporting member provided in the main assembly of the apparatus when said cartridge is mounted to the main assembly;
• a first urging force receptor portion outwardly projected from said cartridge frame portion adjacent one longitudinal end of said developing roller, wherein said first urging force receptor portion receives an urging force by a first elastic member provided in the main assembly when said cartridge is mounted to the main assembly, and wherein said first urging force receptor portion is integrally molded with a first frame member constituting said cartridge frame;
• a second urging force receptor portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing roller, wherein said second urging force receptor portion receives an urging force by a second elastic member provided in the main assembly when said cartridge is mounted to the main assembly, and wherein said second urging force receptor portion is integrally molded with a second frame member constituting said cartridge frame;
• a first contact portion outwardly projected from said cartridge frame portion adjacent said one longitudinal end of said developing roller, wherein said first contact portion contacts a first fixed portion provided in the main assembly when said cartridge is mounted to the main assembly, wherein said first contact portion is integrally molded with the first frame member constituting said cartridge frame;
• a second contact portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing roller, wherein said second contact portion contacts a second fixed portion provided in the main assembly when said cartridge is mounted to the main assembly, and when said second contact portion is integrally molded with the second frame member constituting said cartridge frame;
• a driving force receptor member for receiving, from the main assembly, a driving force for rotating said developing roller when said cartridge is mounted to the main assembly, wherein said driving force receptor member is exposed from said cartridge frame portion adjacent one longitudinal end of said developing roller,
• wherein as seen in a longitudinal direction of said developing roller, each of said first and second urging force receptor portions is disposed such that an angle formed between a first line connecting a center of rotation of said developing roller and a center of rotation of a driving force reception member and a second line connecting a portion of said first or second urging force receptor portion and the center of rotation of said driving force reception member, is 100-130 degrees, and said driving force reception member receives a driving force for rotating said developing roller when said developing cartridge is mounted to the main assembly, and wherein as seen in the longitudinal direction of said developing roller each of said first and second contact portions is disposed such that an angle formed between said first line and a third line connecting a center of said first or second contact portion and a center of rotation of said driving force reception member, is 130-150 degrees.

An electrophotographic image forming apparatus for forming an image on a recording material, comprising:

• a. an electrophotographic photosensitive member;
• b. a first supporting member;
• c. a second supporting member;
• d. a first elastic member;
• e. a second elastic member;
• f. a first fixed portion;
• g. a second fixed portion;
• h. a mounting member for detachably mounting a developing cartridge;
• said developing cartridge comprising:
• developing means for developing, with toner, the latent image formed on the photosensitive member of the main assembly of the apparatus, when said cartridge is mounted to the main assembly of the electrophotographic image forming apparatus;
• a first projected portion outwardly projected from said cartridge frame portion adjacent one longitudinal end of said developing means, wherein said first projected portion is supported by a first supporting member provided in the main assembly of the apparatus when said cartridge is mounted to the main assembly;
• a second projected portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing means, wherein said second projected portion is supported by a second supporting member provided in the main assembly of the apparatus when said cartridge is mounted to the main assembly;
• a first urging force receptor portion outwardly projected from said cartridge frame portion adjacent said one longitudinal end of said developing means, wherein said first urging force receptor portion receives an urging force by a first elastic member provided in the main assembly when said cartridge is mounted to the main assembly;
• a second urging force receptor portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing means, wherein said second urging force receptor portion receives an urging force by a second elastic member provided in the main assembly when said cartridge is mounted to the main assembly;
• a first contact portion outwardly projected from said cartridge frame portion adjacent said one longitudinal end of said developing means, wherein said first contact portion contacts a first fixed portion provided in the main assembly when said cartridge is mounted to the main assembly;
• a second contact portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing means, wherein said second contact portion contacts a second fixed portion provided in the main assembly when said cartridge is mounted to the main assembly;
• and
• i. a driving force transmission member for transmitting a driving force to said developing cartridge mounted to said mounting member.

An electrographic image forming apparatus for forming an image on a recording material, comprising:

• a. an electrophotographic photosensitive member;
• b. a first supporting member;
• c. a second supporting member;
• d. a first elastic member;
• e. a second elastic member;
• f. a first fixed portion;
• g. a second fixed portion;
• h. a mounting member for detachably mounting a developing cartridge, said developing cartridge comprising:
• a developing roller for developing, with toner, the latent image formed on the photosensitive member of the main assembly of the apparatus, when said cartridge is mounted to the main assembly of the electrophotographic image forming apparatus;
• a first projected portion outwardly projected from said cartridge frame portion adjacent one longitudinal end of said developing roller, wherein said first projected portion is supported by a first supporting member provided in the main assembly of the apparatus when said cartridge is mounted to the main assembly;
• a second projected portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing roller, wherein said second projected portion is supported by a second supporting member provided in the main assembly of the apparatus when said cartridge is mounted to the main assembly;
• a first urging force receptor portion outwardly projected from said cartridge frame portion adjacent said one longitudinal end of said developing roller, wherein said first urging force receptor portion receives an urging force by a first elastic member provided in the main assembly when said cartridge is mounted to the main assembly;
• a second urging force receptor portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing roller, wherein said second urging force receptor portion receives an urging force by a second elastic member provided in the main assembly when said cartridge is mounted to the main assembly;
• a first contact portion outwardly projected from said cartridge frame portion adjacent said one longitudinal end of said developing roller, wherein said first contact portion contacts a first fixed portion provided in the main assembly when said cartridge is mounted to the main assembly;
• a second contact portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing roller, wherein said second contact portion contacts a second fixed portion provided in the main assembly when said cartridge is mounted to the main assembly;
• a driving force receptor member for receiving, from the main assembly, a driving force for rotating said developing roller when said cartridge is mounted to the main assembly, wherein said driving force receptor member is exposed from said cartridge frame portion adjacent one longitudinal end of said developing roller;
• wherein as seen in the longitudinal direction of said developing roller, said first urging force receptor portion is disposed such that an angle formed between a first line connecting a center of rotation of said developing roller and a center of rotation of a driving force reception member and a second line connecting a portion of said first urging force receptor portion and the center of rotation of said driving force reception member, is 100-130 degrees, and said driving force reception member receives a driving force for rotating said developing roller when said developing cartridge is mounted to the main assembly, said second urging force receptor portion is disposed such that an angle formed between a first line connecting a center of rotation of said developing roller and a center of rotation of a driving force reception member and a line connecting a portion of siad second urging force reception member is 100-130 degrees, and said driving force reception member receives a driving force for rotating said developing roller when said developing cartridge is mounted to the main assembly;
• and
• i. a driving force transmission member for transmitting a driving force to said driving force receptor member of said developing cartridge when said cartridge is mounted to said mounting member.

An electrophotographic image forming apparatus for forming an image on a recording material, comprising:

• a. an electrophotographic photosensitive member;
• b. a first supporting member;
• c. a second supporting member;
• d. a first elastic member;
• e. a second elastic member;
• f. a first fixed portion;
• g. a second fixed portion;
• h. a mounting member for detachably mounting a developing cartridge, said developing cartridge comprising:
• a developing roller for developing, with toner, the latent image formed on the photosensitive member of the main assembly of the apparatus, when said cartridge is mounted to the main assembly of the electrophotographic image forming apparatus;
• a first projected portion outwardly projected from said cartridge frame portion adjacent one longitudinal end of said developing roller, wherein said first projected portion is supported by a first supporting member provided in the main assembly of the apparatus when said cartridge is mounted to the main assembly;
• a second projected portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing roller, wherein said second projected portion is supported by a second supporting member provided in the main assembly of the apparatus when said cartridge is mounted to the main assembly;
• a first urging force receptor portion outwardly projected from said cartridge frame portion adjacent said one longitudinal end of said developing roller, wherein said first urging force receptor portion receives an urging force by a first elastic member provided in the main assembly when said cartridge is mounted to the main assembly, and wherein said first urging force receptor portion is integrally molded with a first frame member constituting said cartridge frame;
• a second urging force receptor portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing roller, wherein said second urging force receptor portion receives an urging force by a second elastic member provided in the main assembly when said cartridge is mounted to the main assembly, and wherein said second urging force receptor portion is integrally molded with a second frame member constituting said cartridge frame;
• a first contact portion outwardly projected from said cartridge frame portion adjacent said one longitudinal end of said developing roller, wherein said first contact portion contacts a first fixed portion provided in the main assembly when said cartridge is mounted to the main assembly, wherein said first contact portion is integrally molded with the first frame member constituting said cartridge frame;
• a second contact portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing roller, wherein said second contact portion contacts a second fixed portion provided in the main assembly when said cartridge is mounted to the main assembly, and wherein said second contact portion is integrally molded with the second frame member constituting said cartridge frame;
• a driving force receptor member for receiving, from the main assembly, a driving force for rotating said developing roller when said cartridge is mounted to the main assembly, wherein said driving force receptor member is exposed from said cartridge frame portion adjacent one longitudinal end of said developing roller;
• wherein as seen in the longitudinal direction of said developing roller, each of said first and second urging force receptor portions is disposed such that an angle formed between a first line connecting a center of rotation of said developing roller and a center of rotation of a driving force reception member and a second line connecting a portion of said first or second urging force receptor portion and the center of rotation of said driving force reception member, is 100-130 degrees, and said driving force reception member receives a driving force for rotating said developing roller when said developing cartridge is mounted to the main assembly, and wherein as seen in the longitudinal direction of said developing roller each of said first and second contact portions is disposed such that an angle formed between said first line and a third line connecting a center of said first or second contact portion and a center of rotation of said driving force reception member, is 130-150 degrees;
• and
• j. a driving force transmission member for transmitting a driving force to said driving force receptor member of the developing cartridge when said cartridge is mounted to said mounting member.

A developing cartridge for developing a latent image formed on a photosensitive member, wherein said developing cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus, said developing cartridge comprising:

• a cartridge frame;
• a developing member for developing, with the toner, the latent image formed on the photosensitive member of the main assembly of the apparatus, when said cartridge is mounted to the main assembly of the electrophotographic image forming apparatus;
• a first projected portion outwardly projected from said cartridge frame portion adjacent one longitudinal end of said developing member, wherein said first projected portion is supported by a first supporting member provided in the main assembly of the apparatus when said cartridge is mounted to the main assembly;
• a second projected portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing member, wherein said first projected portion is supported by a second supporting member provided in the main assembly of the apparatus when said cartridge is mounted to the main assembly;
• an urging force receptor portion outwardly projected from said cartridge frame portion adjacent said one longitudinal end of said developing member, wherein said urging force receptor portion receives an urging force by an elastic member provided in the main assembly when said cartridge is mounted to the main assembly;
• and
• a contact portion outwardly projected from said cartridge frame portion adjacent said one longitudinal end of said developing member, wherein said contact portion contacts a fixed portion provided in the main assembly when said cartridge is mounted to the main assembly.

A developing cartridge for developing a latent image formed on a photosensitive member, wherein said developing cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus, said developing cartridge comprising:

• a cartridge frame;
• developing member for developing, with the toner, the latent image formed on the photosensitive member of the main assembly of the apparatus, when said developing cartridge is mounted to the main assembly of the electrophotographic image forming apparatus;
• a first projected portion outwardly projected from said cartridge frame portion adjacent one longitudinal end of said developing member, wherein said first projected portion is supported by a first supporting member provided in the main assembly of the apparatus when said developing cartridge is mounted to the main assembly;
• a second projected portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing member, wherein said second projected portion is supported by a second supporting member provided in the main assembly of the apparatus when said developing cartridge is mounted to the main assembly;
• an urging force receptor portion outwardly projected from said cartridge frame portion in a longitudinal direction of said cartridge frame, wherein said urging force receptor portion receives an urging force by an elastic member provided in the main assembly when said developing cartridge is mounted to the main assembly;
• and
• a contact portion outwardly projected from said cartridge frame portion in a longitudinal direction of said cartridge frame, wherein said contact portion contacts a fixed portion provided in the main assembly when said developing cartridge is mounted to the main assembly.

An electrographic image forming apparatus for forming an image on a recording material, comprising:

• a. an electrophotographic photosensitive member;
• b. a first supporting member;
• c. a second supporting member;
• d. an elastic member;
• e. a fixed portion;
• f. a mounting member for detachably mounting a developing cartridge, said developing cartridge comprising:
• a developing member for developing, with toner, the latent image formed on the photosensitive member of the main assembly of the apparatus, when said cartridge is mounted to the main assembly of the electrophotographic image forming apparatus;
• a first projected portion outwardly projected from said cartridge frame portion adjacent one longitudinal end of said developing member, wherein said first projected portion is supported by a first supporting member provided in the main assembly of the apparatus when said cartridge is mounted to the main assembly;
• a second projected portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing member, wherein said second projected portion is supported by the second supporting member provided in the main assembly of the apparatus when said cartridge is mounted to the main assembly;
• an urging force receptor portion outwardly projected from said cartridge frame portion adjacent said one longitudinal end of said developing member, wherein said urging force receptor portion receives an urging force by the elastic member provided in the main assembly when said cartridge is mounted to the main assembly;
• and
• a contact portion outwardly projected from said cartridge frame portion adjacent said one longitudinal end of said developing member, wherein said contact portion contacts the fixed portion provided in the main assembly when said cartridge is mounted to the main assembly;
• and
• g. a driving force transmission member for transmitting a driving force to said developing cartridge mounted to said mounting member.

An electrographic image forming apparatus for forming an image on a recording material, comprising:

• a. an electrophotographic photosensitive member;
• b. a first supporting member;
• c. a second supporting member;
• d. an elastic member;
• e. a fixed portion;
• f. a mounting member for detachably mounting a developing cartridge, said developing cartridge comprising:
• a developing member for developing, with toner, the latent image formed on the photosensitive member of the main assembly of the apparatus, when said developing cartridge is mounted to the main assembly of the electrophotographic image forming apparatus;
• a first projected portion outwardly projected from said cartridge frame portion adjacent one longitudinal end of said developing member, wherein said first projected portion is supported by the first supporting member provided in the main assembly of the apparatus when said developing cartridge is mounted to the main assembly;
• a second projected portion outwardly projected from said cartridge frame portion adjacent the other longitudinal end of said developing member, wherein said second projected portion is supported by the second supporting member provided in the main assembly of the apparatus when said developing cartridge is mounted to the main assembly;
• an urging force receptor portion outwardly projected from said cartridge frame in a longitudinal direction of said cartridge frame, wherein said urging force receptor portion receives an urging force by the elastic member provided in the main assembly when said developing cartridge is mounted to the main assembly;
• and
• a contact portion outwardly projected from said cartridge frame portion in a longitudinal direction of said cartridge frame, wherein said contact portion contacts the fixed portion provided in the main assembly when said developing cartridge is mounted to the main assembly;
• and
• g. a driving force transmission member for transmitting a driving force to said developing cartridge mounted to said mounting member.