Developing cartridge including developing roller capable of moving relative to frame

1. A developing cartridge detachably attachable to an image forming apparatus, the developing cartridge comprising:

a frame;

a toner-accommodating section for accommodating toner;

a developing roller for carrying toner;

a thickness-regulating blade for regulating thickness of toner carried on the developing roller;

a pivoting member having a first end portion and a second end portion, the first end portion of the pivoting member being pivotably coupled to the frame; and

an urging spring disposed between the frame and the pivoting member, the urging spring being configured to urge the pivoting member in a direction that the second end portion of the pivoting member moves away from the frame.

2. The developing cartridge according to claim 1 ,

wherein, in a state where the developing cartridge is attached to the image forming apparatus, the urging spring urges the pivoting member and the developing cartridge is urged in a direction in which the developing roller is contact to a photosensitive drum of the image forming apparatus.

3. The developing cartridge according to claim 1 ,

wherein, in a state where the developing cartridge is attached to the image forming apparatus, the developing roller is positioned above the urging spring.

4. The developing cartridge according to claim 1 ,

wherein, in a state where the developing cartridge is attached to the image forming apparatus, the toner-accommodating section is disposed below the developing roller.

5. The developing cartridge according to claim 1 , further comprising a supply roller for supplying toner to the developing roller;

wherein, in a state where the developing cartridge is attached to the image forming apparatus, the toner-accommodating section is disposed below the supply roller.

6. The developing cartridge according to claim 1 ,

wherein the urging spring is a coil spring.