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 arranged to be movable 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 driving direction of the movable part; a coil provided on the other one of the fixed part and the movable part and arranged to be opposed to the magnet; and an elongated narrow magnetic material which is arranged to the other one of the fixed part and the movable part and is arranged to be opposed to the magnet with the coil inserted between the magnetic material and the magnet so as to form, in combination with the magnet, a magnetic spring, wherein the elongated narrow magnetic material is arranged so as to satisfy: (1) a condition that a longitudinal direction of the magnetic material is an array direction of magnetic poles of the magnet and is a direction along the driving direction of the movable part driven by the magnet and the coil; and (2) a condition that a length the magnetic material along the longitudinal direction is longer than a width of the coil in the driving direction and is shorter than the width of the coil in a direction perpendicular to the driving direction.