Developing Apparatus, Process Cartridge, and Image Forming Apparatus

A process cartridge comprising an image carrier on which an electrostatic latent image is formed on a surface, and a developing apparatus that uses a developer to make visible the electrostatic latent image formed on the image carrier,

• the developing apparatus containing:
• a housing having an opening that opens towards an image carrier on which an electrostatic latent image is formed, and a developer storing unit in which a developer is stored;
• a developer carrier that carries the developer stored in the developer storing unit and transports the developer to a developing region in opposition to the image carrier;
• a partitioning frame arranged in a groove formed between the developer carrier and the developer storing unit of the housing, that is provided with a connecting hole which enables connect between the developer storing unit and the opening;
• a partition arranged on a side surface of the partitioning frame;
• and
• a closely contact section that causes the partitioning frame to closely contact to the groove.

An image forming apparatus comprising a developing apparatus, a latent image forming unit that forms an electrostatic latent image on an image carrier, and a transfer unit that transfers a toner image obtained using the developing apparatus to make the electrostatic latent image visible, to a recording medium,

• the developing apparatus containing:
• a housing having an opening that opens towards an image carrier on which an electrostatic latent image is formed, and a developer storing unit in which a developer is stored;
• a developer carrier that carries the developer stored in the developer storing unit and transports the developer to a developing region in opposition to the image carrier;
• a partitioning frame arranged in a groove formed between the developer carrier and the developer storing unit of the housing, that is provided with a connecting hole which enables connect between the developer storing unit and the opening;
• a partition arranged on a side surface of the partitioning frame;
• and
• a closely contact section that causes the partitioning frame to closely contact to the groove.