Patent ID: 8244159

Claim:
An image forming apparatus, comprising: a main body; a driving unit mounted to the main body, the driving unit comprising a driving shaft and a driving coupler connected to the driving shaft, the driving coupler having arranged thereon a plurality of driving tips; and a consumable unit detachably received in the main body, the consumable unit comprising a rotating body configured to rotate with a driven shaft and a passive coupler connected to the driven shaft, the passive coupler having arranged thereon a plurality of passive tips, corresponding ones of the plurality of driving tips and the plurality of passive tips coming into engaging contact with each other when the consumable unit is operably received in the main body, and the corresponding ones of the plurality of driving tips and the plurality of passive tips maintaining the engaging contact with each other to drive the driven shaft by driving the driving shaft when respective rotational axes of the driving shaft and the driven shaft intersect each other at a non-zero angle.