Patent ID: 9618885
Date: 2017-04-11
CPC Classifications: F16C,G03G

Claim:
1. A fixing device, comprising: a housing; a rotary member in the form of a cylinder including an outer circumferential portion, and an inner circumferential portion made of a metal; a shaft secured to the housing and having an axis of rotation of the rotary member; a heat source configured to generate heat to be transmitted to the rotary member; a bearing including an inner race supporting the shaft, and an outer race radially spaced from the inner race and supporting the inner circumferential portion of the rotary member, the outer race being rotatable relatively to the inner race; and a ring member fitted on the shaft adjacently to the bearing, and including a circumferential surface in contact with the inner circumferential portion of the rotary member from radially inside, and a side surface in contact with the inner race and the outer race of the bearing in an axial direction, wherein the ring member is in contact with the inner race and the outer race of the bearing at least at three positions spaced apart in a circumferential direction.