Optical image stabilizer and lens driving apparatus

• US 8,730,595 B2
• Filed: 12/26/2012
• Issued: 05/20/2014
• Est. Priority Date: 12/27/2011
• Status: Active Grant

• Current Assignee: Nidec Copal Corporation (Nidec Corporation)
• Original Assignee: Nidec Copal Corporation (Nidec Corporation)
• Inventors: Shikama, Kazuo, Machida, Takuya, Mandai, Haruhiko, Watanabe, Hiroyuki
• Primary Examiner(s): HASAN, MOHAMMED A
• Application Number:
  US13/726,982
• Publication Number:
  US 20130162851A1
• Time in Patent Office: 510 Days
• Field of Search: 359694-704, 359811-830, 348/335, 348/345, 348/349, 348/357, 396/55, 396/133, 396/144, 310/12.02, 310/12.27, 310/13, 310/15, 310/49, 310/32
• US Class Current: 359/813
• CPC Class Codes: G03B 2205/0015 by displacing one or more optical elements normal to the optical axis
• CPC Class Codes: G03B 2205/0069 using electromagnetic actuators, e.g. voice coils
• CPC Class Codes: G03B 5/00 Adjustment of optical system relative to image or object surface other than for focusing
• CPC Class Codes: H04N 23/55 Optical parts specially adapted for electronic image sensors; Mounting thereof
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position

Abstract

An optical image stabilizer includes a base member, a movable member that is disposed at the base member and moves along a plane orthogonal to an optical axis, a movable-member driving portion that is disposed at the base member and the movable member, and moves the movable member in a direction orthogonal to the optical axis, and a regulator that regulates a movement of the movable member along the plane orthogonal to the optical axis. The regulator regulates the movement of the movable member with two movement paths, which are a linear movement path along which the movable member moves in a direction orthogonal to the optical axis and a rotation path along which the movable member rotates around a point on the linear movement path.

Claims

1. An optical image stabilizer comprising:

a base member;

a movable member that is disposed at the base member and moves along a plane orthogonal to an optical axis;

a movable-member driving portion that is disposed at the base member and the movable member, and moves the movable member in a direction orthogonal to the optical axis; and

a regulator that regulates a movement of the movable member along the plane orthogonal to the optical axis,

wherein the regulator regulates the movement of the movable member with two movement paths, which are a linear movement path along which the movable member moves in a direction orthogonal to the optical axis and a rotation path along which the movable member rotates around a point on the linear movement path.

2. The optical image stabilizer according to claim 1,

wherein the regulator includes

one of a cut portion and a through hole, which is formed in one of the base member and the movable member, and extends along the linear movement path, and

one of a pin portion and a spherical portion, which is inserted into one of the cut portion and the through hole, and provided on the other one of the base member and the movable member.

3. The optical image stabilizer according to claim 2,

wherein one of the cut portion and the through hole has a pair of opposing side walls that are parallel to the linear movement path, and

wherein the pin portion slides along the pair of side walls.

4. The optical image stabilizer according to claim 2,

wherein one of the cut portion and the through hole has a pair of inclined surfaces that are parallel to the linear movement path and form a V-shape,

wherein one of the pin portion and the spherical portion slides along the pair of inclined surfaces.

5. The optical image stabilizer according to claim 2,

wherein one of the cut portion and the through hole has a pair of opposing side walls that are parallel to the linear movement path, and

wherein the spherical portion slides along opening-side edge portions of the pair of side walls.

6. The optical image stabilizer according to claim 1,

wherein the regulator includes

a regulating surface that is provided on one of the base member and the movable member, and extends along the linear movement path, and

a sliding portion that is provided on the other one of the base member and the movable member, and is in contact with the regulating surface.

7. The optical image stabilizer according to claim 6,

wherein a part of the sliding portion that is in contact with the regulating surface has a circular shape in a plane orthogonal to the optical axis.

8. The optical image stabilizer according to claim 6,

wherein the regulating surface is provided on one of a cut portion and a through hole, which extends along the linear movement path, and

wherein the sliding portion is one of a pin portion and a spherical portion, which is inserted into one of the cut portion and the through hole.

9. The optical image stabilizer according to claim 6,

wherein the regulating surface is parallel to the linear movement path and includes one of a pair of opposing side walls and a pair of inclined surfaces, which form a V-shape.

10. A lens driving apparatus comprising:

an optical image stabilizer that comprises;

a base member;

a movable member that is disposed at the base member and moves along a plane orthogonal to an optical axis;

a movable-member driving portion that is disposed at the base member and the movable member, and moves the movable member in a direction orthogonal to the optical axis; and

a regulator that regulates the movement of the movable member along the plane orthogonal to the optical axis,

wherein the regulator regulates the movement of the movable member with two movement paths, which are a linear movement path along which the movable member moves in a direction orthogonal to the optical axis and a rotation path along which the movable member rotates around a point on the linear movement path;

a lens frame that is disposed at the movable member, retains a lens, and moves in a direction of the optical axis; and

a lens-driving portion that is disposed at the movable member and the lens frame, and moves the lens in the direction of the optical axis.