Developing cartridge including holder cover that covers holder holding electrical contact surface

1. A developing cartridge comprising:

a casing configured to accommodate toner therein;

a developing roller rotatable about a first axis extending in a first direction, the developing roller being positioned at one end portion of the casing in a second direction;

a storage medium having an electrical contact surface;

a holder positioned at one end of the casing in the first direction, the holder holding the electrical contact surface, the holder having:

a first outer surface positioned at one end portion of the holder in a third direction crossing the electrical contact surface, the first outer surface holding the electrical contact surface;

a second outer surface positioned at another end portion of the holder in the third direction, the second outer surface being spaced away from the first outer surface in the third direction; and

a resilient member positioned between the first outer surface and the second outer surface, the resilient member being configured to expand and contract in the third direction, the resilient member being connected to the first outer surface and to the second outer surface, a distance between the first outer surface and the second outer surface in the third direction being configured to change by the expansion and contraction of the resilient member; and

a holder cover configured to be attached to the holder to cover at least a portion of the holder, the holder cover being configured to urge the first outer surface toward the second outer surface and to urge the second outer surface toward the first outer surface in a state where the holder cover is attached to the holder,

the resilient member having a first length in the third direction in a state where the holder cover is detached from the holder, the resilient member having a second length in the third direction smaller than the first length in a state where the holder cover is attached to the holder.

2. The developing cartridge according to claim 1 , wherein the holder cover covers an entirety of the electrical contact surface in a state where the holder cover is attached to the holder.

3. The developing cartridge according to claim 2 , wherein the holder cover has an inner surface, and

wherein, in a state where the holder cover is attached to the holder, the electrical contact surface faces the inner surface in the third direction and is spaced away from the inner surface in the third direction.

4. A process cartridge comprising:

a developing cartridge comprising:

a casing configured to accommodate toner therein;

a developing roller rotatable about a first axis extending in a first direction, the developing roller being positioned at one end portion of the casing in a second direction;

a storage medium having an electrical contact surface;

a holder positioned at one end of the casing in the first direction, the holder holding the electric contact surface, the holder having:

a first outer surface positioned at one end portion of the holder in a third direction crossing the electrical contact surface, the first outer surface holding the electrical contact surface;

a second outer surface positioned at another end portion of the holder in the third direction, the second outer surface being spaced away from the first outer surface in the third direction; and

a resilient member positioned between the first outer surface and the second outer surface, the resilient member being configured to expand and contract in the third direction, the resilient member being connected to the first outer surface and to the second outer surface, a distance between the first outer surface and the second outer surface in the third direction being configured to change by the expansion and contraction of the resilient member; and

a holder cover configured to be attached to the holder to cover at least a portion of the holder, the holder cover being configured to urge the first outer surface toward the second outer surface and to urge the second outer surface toward the first outer surface in a state where the holder cover is attached to the holder,

the resilient member having a first length in the third direction in a state where the holder cover is detached from the holder, the resilient member having a second length in the third direction smaller than the first length in a state where the holder cover is attached to the holder; and

a drum cartridge to which the developing cartridge is attachable, the drum cartridge comprising:

a photosensitive drum rotatable about a second axis extending in the first direction; and

a drum coupling positioned at one end portion of the photosensitive drum in the first direction, the holder cover being configured to cover the drum coupling of the drum cartridge in a state where the holder cover is attached to the holder of the developing cartridge that has been attached to the drum cartridge.

5. The process cartridge according to claim 4 , wherein the developing cartridge further comprises a developing coupling positioned at one side of the developing roller in the first direction, and

wherein the holder cover is configured to cover the developing coupling in a state where the holder cover is attached to the holder of the developing cartridge that has been attached to the drum cartridge.

6. An image forming apparatus to which the developing cartridge according to claim 1 is attachable, the image forming apparatus comprising:

an electrical contact configured to be in contact with the electrical contact surface in a state where the developing cartridge in which the holder cover is not attached to the holder is attached to the image forming apparatus, the electrical contact being configured to be spaced away from the electrical contact surface in the third direction in a state where the developing cartridge in which the holder cover is attached to the holder is attached to the image forming apparatus.

7. An image forming apparatus comprising:

a developing cartridge comprising:

a casing configured to accommodate toner therein;

a developing roller rotatable about a first axis extending in a first direction, the developing roller being positioned at one end portion of the casing in a second direction;

a storage medium having an electrical contact surface;

a holder positioned at one end of the casing in the first direction, the holder holding the electric contact surface, the holder having:

a first outer surface positioned at one end portion of the holder in a third direction crossing the electrical contact surface, the first outer surface holding the electrical contact surface;

a second outer surface positioned at another end portion of the holder in the third direction, the second outer surface being spaced away from the first outer surface in the third direction; and

a resilient member positioned between the first outer surface and the second outer surface, the resilient member being configured to expand and contract in the third direction, the resilient member being connected to the first outer surface and to the second outer surface, a distance between the first outer surface and the second outer surface in the third direction being configured to change by the expansion and contraction of the resilient member; and

a holder cover configured to be attached to the holder to cover at least a portion of the holder, the holder cover being configured to urge the first outer surface toward the second outer surface and to urge the second outer surface toward the first outer surface in a state where the holder cover is attached to the holder,

the resilient member having a first length in the third direction in a state where the holder cover is detached from the holder, the resilient member having a second length in the third direction smaller than the first length in a state where the holder cover is attached to the holder;

a cartridge holding portion to which the developing cartridge is attachable; and

an electrical contact configured to be in contact with the electrical contact surface in a state where the developing cartridge in which the holder cover is not attached to the holder is attached to the cartridge holding portion, the electrical contact being configured to be spaced away from the electrical contact surface in the third direction in a state where the developing cartridge in which the holder cover is attached to the holder is attached to the cartridge holding portion.