RETENTION MECHANISM, DRIVING APPARATUS, AND BLUR CORRECTION APPARATUS

摘要

A retention mechanism includes a fixed part including a magnet, and a movable part opposed to the fixed part. A plurality of rolling elements are provided between the fixed part and the movable part, and the movable part is movable in a plane direction. A magnetic material which forms, in combination with the magnet, a magnetic spring is provided on the movable part. The magnetic spring generates a magnetic attraction force which attracts the movable part to the fixed part. The magnetic material is extended along a direction in which magnetic poles of the magnet are arrayed.

主权项

1. A retention mechanism comprising:
a fixed part; a movable part arrayed to be opposed to the fixed part; a plurality of rolling elements which are arranged between the fixed part and the movable part and support the movable part to be movable in relation to the fixed part along a plane perpendicular to an array direction of the movable part in relation to the fixed part; a magnet provided on one of the fixed part and the movable part and having magnetic poles arrayed in a first direction perpendicular to the array direction; and a magnetic material which is provided on the other one of the fixed part and the movable part, and opposed to the magnet so as to form, in combination with the magnet, a magnetic spring, the magnetic material being extended in the first direction in which the magnetic poles of the magnet are arrayed, wherein the magnetic material is an elongated narrow plate member which is extended in the first direction along the perpendicular plane, and wherein the magnetic material is positioned to be opposed to the magnet in a positional relationship in which area sizes of two areas of the magnetic material respectively projected onto the magnetic poles of the magnet are equal to each other.