Patent ID: 7428087

Claim:
A weight-balancing structure for rotary polygon mirror in color laser printer, comprising: a stator set; a rotary set having a loading disc, a motor housing located underneath said loading disc and disposed to enclose said stator set, and a permanent magnet disposed on an inner periphery of said motor housing to correspond to said stator set; and a rotary polygon mirror disposed on top of said loading disc and fixed to said loading disc with a spring member to synchronously rotate therewith; wherein a plurality of spring paws are disposed around a circumference of said spring member and extended obliquely in a downward direction, at least two spring paws are integrally formed with a ring portion, said ring portion is located around an outer circumference of said plural spring paws and formed in an upwardly curled manner, so that a weight block is stuck on an inner periphery of said ring portion by an adhesive-applying means.