Developer storage case having a discharge opening of a flat shape

1. A developer storage case comprising:

a storage case that includes a discharge opening formed in the horizontal direction side surface thereof, that is formed in a flat shape having a horizontal direction width of larger than the vertical direction height thereof, and that stores a developer therein;

a delivery member that has a center of rotation disposed shifted to the discharge opening, that is rotatably supported on one end wall of the storage case, and that delivers the developer stored within the storage case; and

a drive transmission member that is supported on an end portion of the delivery member, and that drives and rotates the delivery member,

wherein

the storage case defines an opening on an end side thereof opposite to an end side of the one end wall thereof, and

another end side support member closes the opening, and rotatably supports another end portion of the delivery member.

2. The developer storage case as claimed in claim 1 , wherein the discharge opening is formed in the vicinity of the drive transmission member.

3. The developer storage case as claimed in claim 1 , wherein the delivery member includes a rotation shaft and a flexible delivery member main body rotatable in contact with the inner peripheral surface of the storage case.

4. An image forming apparatus comprising:

an image holder;

a developing device that develops a latent image on the surface of the image holder into a visible image;

a developer storage case according to claim 1 , the developer storage storing therein a new developer to be supplied to the developing device;

a transfer device that transfers the visible image developed by the developing device to a medium; and

a fixing device that fixes the visible image transferred to the medium.