Patent ID: 6859629

Claim:
A developer container for accommodating a developer used for developing an electrostatic latent image formed on an electrophotographic photosensitive member by means of a developing member for developing the electrostatic latent image, said developer container comprising: a first light-transmitting window configured and positioned to guide detection light emitted from a light emitting member provided in a main body of an image forming apparatus into said developer container, in order to detect a remaining amount of the developer accommodated within said developer container when said developer container is mounted in the main body of the image forming apparatus; a second light-transmitting window configured and positioned to guide the detection light, entering from said first light-transmitting window and passing through said developer container, to a photosensing member provided in the main body of the image forming apparatus, in order to detect the remaining amount of the developer accommodated within said developer container when said developer container is mounted in the main body of the image forming apparatus; and a rotatable feeding member comprising a stirring blade configured and positioned to feed the developer within said developer container toward the developing member when rotating, and to remove particles of the developer adhering to said first light-transmitting window and said second light-transmitting window by contacting said first light-transmitting window and said second light-transmitting window, wherein at least one of the respective inner surfaces of said first light-transmitting window and said second light-transmitting window facing the inside of said developer container has an inner inclined portion having a circular convex portion whose central portion is raised from both end sides in the longitudinal direction of said rotatable feeding member, wherein said inner inclined portion is inclined in a direction crossing the longitudinal direction of said rotatable feeding member, and wherein when said rotatable feeding member rotates, said stirring blade slidingly contacts said circular convex portion along said inner inclined portion to remove developer from said inner inclined portion.