Developing roller assembly

The utility model discloses a developing roller assembly and relates to the technical field of developing rollers. The developing roller assembly comprises a developing roller body, a groove is formed in one side of the developing roller body, an extension rod is slidably connected to the inner wall of the groove, two openings are formed in the upper side of the extension rod, first springs are arranged on the lower sides of inner cavities of the two openings, and clamping blocks are connected to the upper ends of the two first springs. The end, close to the extension rod, of the developing roller body is lifted, the left clamping block is pressed down, the extension rod is not limited by the clamping block any more, the extension rod is pulled out, in the pulling-out process, the right clamping block can be clamped into the clamping groove and limit the extension rod, at the moment, part of the extension rod extends out of the groove, and the extension rod can be held to take up the developing roller body. O