DEVELOPING DEVICE, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS

摘要

A developing device includes: a developer carrying member; a developer container including a developer accommodating portion, a developing opening and a developing chamber; and a developer supplying member including a shaft member and a feeding member. The feeding member includes a first feeding portion having a length L1 and a radius R1, and includes a second feeding portion having a length L2 and a radius R2. When a length of the developing opening is L3, a shortest length from the developing opening to the rotation center of the shaft member is L4, and a length from the developer carrying member to the rotation center of the shaft member is L5, the following relationships are satisfied:;L1

主权项

1. A developing device comprising:
a developer carrying member for developing an electrostatic image with a developer; a developer container including a developer accommodating portion for accommodating the developer, a developing opening and a developing chamber; and a developer supplying member for supplying the developer to the developing chamber through the developing opening, wherein said developer supplying member includes a shaft member rotatably supported by the developer accommodating portion and a feeding member, wherein the feeding member includes a first feeding portion which has a length L1 measured in an axial direction of said developer carrying member and a radius R1 measured from a rotation center of the shaft member, and includes a second feeding portion which has a length L2 measured in the axial direction of said developer carrying member and a radius R2 measured from the rotation center of the shaft member, and wherein when a length of the developing opening with respect to the axial direction of said developer carrying member is L3, a shortest length from the developing opening to the rotation center of the shaft member is L4, and a length from said developer carrying member to the rotation center of the shaft member is L5, the following relationships are satisfied:
L1