Cartridge having agitator and rotary member with detected portion

1. A cartridge comprising:

a housing configured to accommodate developer therein;

an agitator positioned in the housing and rotatable relative to the housing about an axis defining an axial direction;

a first rotary member having a detected portion and a first abutment portion and rotatable relative to the housing; and

a second rotary member rotatable relative to the housing and having a second abutment portion abuttable on the first abutment portion, the second rotary member being configured to transmit a driving force to the first rotary member, the first rotary member being configured to move from a first position spaced apart from the second rotary member to a second position contacting the second rotary member to receive the driving force from the second rotary member,

the agitator comprising:

a rotation shaft extending in the axial direction and having an axial end portion at which the second rotary member is supported; and

an agitation blade supported to the rotation shaft and resiliently deformable, the agitation blade being in contact with and spaced away from the housing in accordance with the rotation of the rotation shaft, and

the second rotary member being configured such that while the agitation blade is spaced apart from the housing, the second abutment portion contacts the first abutment portion in accordance with rotation of the second rotary member to move the first rotary member from the first position to the second position, thereby transmitting the driving force from the second rotary member to the first rotary member.

2. The cartridge as claimed in claim 1 , wherein the rotation shaft has a reference portion that is a reference for relative positioning between the agitation blade and the second rotary member in a rotational direction of the agitator.

3. The cartridge as claimed in claim 2 , wherein the reference portion is positioned at the end portion of the rotation shaft in the axial direction, and has a generally D-shape, when viewed in the axial direction, in which a peripheral surface of the rotation shaft is partially cut away, the second rotary member being attached to the reference portion.

4. The cartridge as claimed in claim 1 , wherein the agitation blade is disposed within an angular range of 180 degrees in a rotational range of 360 degrees of the agitator.

5. The cartridge as claimed in claim 1 , wherein the housing has a wall portion at which the first rotary member and the second rotary member are provided, and

wherein the second rotary member comprises a first gear portion and a second gear portion, the first gear portion and the second gear position arrayed in the axial direction, the second gear portion being positioned farther away from the wall portion than the first gear portion from the wall portion, and the second gear portion being in contact with the first rotary member to transmit the driving force to the first rotary member.

6. The cartridge as claimed in claim 1 , further comprising a cover member covering the first rotary member and the second rotary member, the cover member being spaced apart from the second rotary member in the axial direction.

7. The cartridge as claimed in claim 1 , further comprising a shutter disposed in the housing and configured to restrict movement of the developer,

wherein the housing comprises:

a first accommodating chamber configured to accommodate therein the developer, and in which the agitator is disposed;

a second accommodating chamber positioned adjacent to the first accommodating chamber; and

an opening portion providing communication between the first accommodating chamber and the second accommodating chamber,

wherein the shutter is configured to move between an open position opening the opening portion and a closed position closing the opening portion in interlocking relation with the rotation of the agitator such that the shutter is at the open position when the agitation blade is moved past the opening portion, and

the second rotary member being configured such that the second rotary member is brought into contact with the first rotary member while the agitation blade is moving past the opening portion and is spaced apart from the shutter.

8. The cartridge as claimed in claim 1 , wherein the second rotary member comprises a gear wheel, and

wherein the first rotary member comprises:

a gear teeth portion configured to engage the gear wheel to receive the driving force when the first rotary member is at the second position; and

a tooth lacking portion configured to face the second rotary member when the first rotary member is at the first position to avoid engagement with the gear wheel.