Image forming apparatus and image reading apparatus

摘要

A rotation stabilizing device (11) comprises a rotary member (12) rotated around a rotating center axis; an inertia member (13) vibrating in accordance with change of rotating speed of the rotary member; and a viscoelastic connector (24) for detachably connecting the inertia member to the rotary member, wherein the viscoelastic connector has viscosity and elasticity so as to change form in accordance with vibration of the inertia member. The inertia member is connected to at least one of an outer side and an inner side of the rotary member at a same phase in a direction of the rotating center axis of the rotary member by the viscoelastic connector.