Patent ID: 7945193

Claim:
An image forming apparatus comprising: an image bearing member for carrying a latent image; a developing device including: i. a rotatable developer carrying member for carrying a developer and for supplying the developer to said image bearing member; ii. a developer feeding member, provided rotatably in a developing container containing the developer, for feeding the developer; iii. a first driving force receiving member, provided at one end portion of said developer carrying member with respect to a rotational axis direction of said developer carrying member, for receiving a driving force for driving said developer carrying member; iv. a second driving force receiving member, provided at the other end portion of said developer carrying member with respect to the rotational axis direction of said developer carrying member, for receiving a driving force for driving said developer feeding member; v. abutment members provided at respective end portions of said developer carrying member to determine a gap between said image bearing member and said developer carrying member by being abutted to respective end portions of said image bearing member; a supporting mechanism for supporting said developing device rotatably relative to a main assembly of said apparatus; a first drive inputting member, provided in said main assembly side of the apparatus, for directly inputting the driving force to said first driving force receiving member; and a second drive inputting member, provided in said main assembly side of the apparatus, for directly inputting the driving force to said second driving force receiving member, wherein said first driving force receiving member and said second driving force receiving member are provided such that directions of components, in directions toward and away from said image bearing member, of forces applied to said abutment members are the same at the time when the driving forces are inputted to said first driving force receiving member and said second driving force receiving member, respectively.