Optical apparatus with movable member for shake correction

摘要

An image shake correction device capable of reducing a sliding friction force occurring with movement of a movable member, thereby reducing load on a drive unit for driving the movable member and improving the positioning accuracy of the movable member. The movable member of the correction device is supported to be movable in a yaw direction and supported to be pivotable in a pitch direction, and a ball is held between the movable member and a guide groove formed in a stationary member and extending in the yaw direction. When the movable member moves in the yaw direction, the ball rolls along the guide groove. When the movable member pivots in the pitch direction, a contact point where the movable member contacts with the ball functions as a pivotal fulcrum for the movable member.

主权项

1. An image shake correction device comprising:
a stationary member; a movable member configured to be moveable linearly in a first direction relative to the stationary member and rotatable relative to the stationary member in a second direction different from the first direction; a first guide groove having inclined surfaces that are not parallel to each other and extending in the first direction provided in one of the stationary member or the movable member; a receiving portion provided in one of the stationary member or the movable member; a first rolling member held between the stationary member and the moveable member on the first guide groove; a second rolling member held between the stationary member and the movable member on the receiving portion; and a drive unit configured to drive said movable member in the first and second directions, wherein the first rolling member is in contact at each of the inclined surfaces, wherein the first rolling member is in contact at one point with the other of the stationary member or the movable member, wherein in a case where the movable member moves linearly in the first direction, the first rolling member rolls along the first guide groove and the second rolling member rolls on the receiving portion, and wherein in a case where the movable member rotates in the second direction, the first rolling member functions as a pivotal fulcrum for the movable member and the second rolling member rolls on the receiving portion.