Shake correction device

摘要

The present invention provides a shake correction device which can not generate the hysteresis phenomenon and can suppress unnecessary resonance and improve endurance with respect to drop impact. In this shake correction device, the eddy current induction plate 16a of +Z side is opposite to and has a gap with the surface (14a) of the +Z side of the permanent magnet (14) which is arranged to wind around the optical axis at an interval of 90 degree in the Z direction, the eddy current induction plate 16b of radial direction is opposite to and has a space with the surface (14b) of the outside in the radial direction, and the eddy current induction plate 16c of the periphery direction is opposite to and has a gap with the surface (14c) in the periphery direction.

主权项

1. A shake correction device, comprising a plurality of rectangle board-shaped permanent magnets, when a direction toward a photographed object is set as a positive direction of an optical axis, a surface of each of the permanent magnets faces a lens and the permanent magnets are disposed around the optical axis at an interval of 90 degrees, and the permanent magnets and the lens are swung along a direction perpendicular to the optical axis, wherein the shake correction device further includes:
a brake member, formed by a non-magnetic conductor, and at least one eddy current induction plate arranged on the brake member, wherein, the at least one eddy current induction plate is arranged to be opposite to and has a gap with a surface on an outer periphery side of the permanent magnets, a surface on the positive direction of the optical axis, and a surface adjacent to the surface on the outer periphery side and the surface on the positive direction of the optical axis, and the at least one eddy current induction plate generates eddy currents in response to a magnetic field caused by the shift of the permanent magnets.