JP2011158924A5 - - Google Patents

Claims (8)

An image stabilization lens,
A movable member that holds the shake correction lens and is movable relative to the fixed member in a plane perpendicular to the optical axis;
A guide member that is movable in a plane perpendicular to the optical axis with respect to the fixed member and guides the movable member so as not to rotate in a plane perpendicular to the optical axis;
Three first rolling balls sandwiched between the fixing member and the guide member so as to be able to roll;
Two second rolling balls sandwiched between the guide member and the movable member in a rollable manner;
One third rolling ball sandwiched between the fixed member and the movable member so as to be capable of rolling;
A shake correction device having drive means for driving the movable member in a direction perpendicular to the optical axis with respect to the fixed member,
Two of the three first rolling balls can roll only in a first direction perpendicular to the optical axis,
The two second rolling balls can roll only in a second direction different from the first direction in a direction perpendicular to the optical axis,
It said one of the third rolling ball, Ri freely rollably der in a direction perpendicular to the optical axis,
When viewed from a direction perpendicular to the optical axis, the third rolling ball and the first rolling ball are arranged so that at least a part thereof overlaps,
A shake correction apparatus characterized by that. When viewed from a direction perpendicular to the optical axis, the third rolling ball and said second rolling balls are disposed so that they at least partially overlap, that in claim 1, wherein The shake correction apparatus described. A line connecting the contact points of the two second rolling balls with the guide member and a triangle connecting the contact points of the three first rolling balls with the guide member are an optical axis. 3. The shake correction apparatus according to claim 1, wherein the shake correction apparatus is configured to intersect at two points in a state of being projected onto a plane perpendicular to. The second rolling ball and the third rolling ball are arranged at equal intervals in the rotation direction around the optical axis,
Contact portions of the first rolling ball and the second rolling ball to the guide member are arranged at different positions in the rotation direction around the optical axis,
The contact portion of the guide member and the fixing member with the first rolling ball that can roll only in the first direction is constituted by a guide groove extending in the first direction,
A contact portion of the movable member and the fixed member with the second rolling ball is constituted by a guide groove extending in the second direction.
Shake correcting device according to any one of claims 1 to 3, characterized in that. The driving means is composed of a yoke which is a magnetic body magnetically coupled to a magnet, and is fixed integrally with the fixing member,
Contact portions of the third rolling ball and at least two of the first rolling balls to the fixing member are constituted by the yoke.
Shake correcting device according to any one of claims 1 to 4, characterized in that. Urging means for urging the movable member in the direction of the fixed member;
The biasing means is disposed so as to be at the same position in the rotation direction around the optical axis as the second rolling ball and the third rolling ball.
The shake correction apparatus according to claim 5 , wherein: The first rolling ball, the second rolling ball, the first rolling ball, the third rolling ball with respect to the rotation direction about the optical axis in a state projected onto a plane perpendicular to the optical axis, 6. The shake correction apparatus according to claim 5 , wherein the first rolling ball and the second rolling ball are arranged in this order. Optical apparatus having a shake correction device according to any one of claims 1 to 7.