Patent ID: 8279553
Filing Date: 2012-10-02
Classification: F16C,G11B

Abstract:
1. A rolling bearing of an information recording and reproducing device, comprising: an inner ring and an outer ring which are arranged concentrically; a plurality of rolling bodies held between the inner ring and the outer ring in a rotatable manner; and an annular shield plate engageable with an engaging groove portion which is formed on an inner peripheral surface of the outer ring along the circumferential direction and opens toward an inner peripheral surface side and an open end side and closes a circular annular space defined between the outer ring and the inner ring; wherein the shield plate comprises: an annular shield body having an inner peripheral portion that surrounds the inner ring from the outside in the radial direction and an outer peripheral portion that faces the outer ring; and a plurality of engaging projections which are arranged along the outer peripheral portion of the shield body, project outwardly in the radial direction from the outer peripheral portion in an inclined state, and are engageable with the engaging groove portion, and wherein each of the engaging projections is deformable by bending in the orthogonal direction orthogonal to the in-plane direction of the shield body using a connecting portion of each of the engaging projections connected with the outer peripheral portion of the shield body as a start point, and is formed such that a projecting length of each of the engaging projections from the outer peripheral portion at both end portions in the circumferential direction is set shorter than the projecting length of each of the engaging projections from the outer peripheral portion at a center portion in the circumferential direction.