Patent ID: 6119823
Filing Date: 2000-09-19
Classification: G11B

Abstract:
A brake mechanism for a rotator comprising:a brake member rotatably supported and including a contact portion which comes into contact with an outer surface of the rotator to stop rotation of the rotator;an elastic member for exerting force to said brake member in a direction in which the contact portion is brought into contact with the rotator; anda restriction member for restricting a range of the rotation of said brake member;wherein the brake mechanism for the rotator is assembled in such a way that, when the rotator rotates in a first direction, in which force for causing said brake member to be brought toward said restriction member is exerted to said brake member of which the contact portion is in contact with the outer surface of the rotator, an automatic biting condition is satisfied at a rotation braking start point which is a moment the contact portion is brought into contact with the outer surface of the rotator, and subsequently a relieving condition is satisfied when said brake member comes into contact with said restriction member; and on the other hand, when the rotator rotates in a second direction, in which force against the force exerted to said brake member by said elastic member is extended to said brake member of which the contact portion is in contact with the outer surface of the rotator, which is opposite to the first direction, said relieving condition is satisfied at the rotation braking start point, and then said relieving condition is also satisfied when the rotator stops rotating.