Developing cartridge including first and second cams connected by connection member and movable relative to casing

A developing cartridge comprising:

• a casing configured to accommodate developing agent therein, the casing including one end portion and another end portion spaced apart from the one end portion in a first direction;
• a developing roller rotatable about a developing roller axis extending in the first direction;
• a first cam positioned at the one end portion of the casing, the first cam being movable relative to the casing and the developing roller in the first direction between a first position and a second position, the first cam in the second position being positioned closer to the another end portion of the casing in the first direction than the first cam in the first position is to the another end portion of the casing;
• a second cam positioned at the another end portion of the casing, the second cam being movable relative to the casing and the developing roller in the first direction between a third position and a fourth position, the second cam in the fourth position being positioned closer to the another end portion of the casing in the first direction than the second cam in the third position is to the another end portion of the casing;
• and
• a connection member connecting the first cam and the second cam to each other,
• wherein the second cam is movable from the third position to the fourth position due to a tensile force of the connection member in accordance with movement of the first cam from the first position to the second position.