Optical unit with shake correction function

Patent metadata

Field	Value
Publication number	US-12096123-B2
Application number	US-202318152763-A
Country	US
Kind code	B2
Filing date	Jan 11, 2023
Priority date	Jan 13, 2022
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

In an optical unit with a shake correction function, a frame-shaped holder to which a camera module is fixed to an inner periphery being structured of a metal portion formed of a metal material, and a resin portion formed of a resin material and integrated with the metal portion by insert molding. The metal portion includes magnet fixing portions formed of a magnetic material and to which a driving magnet is fixed, and spherical body contact portions in contact with a spherical body made of metal and serving as a fulcrum for pivotal movement of the holder.

First claim

What is claimed is:

1. An optical unit with a shake correction function, comprising:
a movable body including a camera module;
an intermediate member, configured to hold the movable body to be pivotally movable;
a fixed body, configured to hold the intermediate member to be pivotally movable;
a magnet drive mechanism, configured to pivotally move the movable body with respect to the fixed body, so that an optical axis of the camera module is inclined in any direction;
a first fulcrum portion, configured to serve as a fulcrum for pivotal movement of the movable body with respect to the intermediate member; and
a second fulcrum portion, configured to serve as a fulcrum for pivotal movement of the intermediate member with respect to the fixed body,
wherein the movable body is configured to be pivotally movable with respect to the intermediate member around a first crossing direction intersecting an optical axis of the camera module, as an axis direction in pivotal movement;
the intermediate member is configured to be pivotally movable with respect to the fixed body around a second crossing direction intersecting the first crossing direction and intersecting an optical axis of the camera module, as an axis direction in pivotal movement;
the first fulcrum portion is disposed at both ends of the intermediate member in the first crossing direction;
the movable body including a frame-shaped holder to which the camera module is fixed on an inner periphery;
the intermediate member including two arm portions constituting end portions of the intermediate member in the first crossing direction;
the magnet drive mechanism including a driving magnet being fixed to the holder and a driving coil being fixed to the fixed body;
the first fulcrum portion including a spherical body disposed between the arm portion and the holder;
the holder is structured of a metal portion formed of a metal material, and a resin portion formed of a resin material being integrated with the metal portion by insert molding; and
the metal portion including: a magnet fixing portion formed of a magnetic material, to which the driving magnet is fixed, and a spherical body contact portion in contact with the spherical body.

2. The optical unit with a shake correction function according to claim 1 , wherein
both ends of the resin portion in an optical axis direction being a direction of an optical axis of the camera module are disposed outside in the optical axis direction with respect to both ends of the metal portion in the optical axis direction.

3. The optical unit with a shake correction function according to claim 1 , wherein
an outer end of the resin portion in a radial direction of the holder orthogonal to an optical axis direction being a direction of an optical axis of the camera module is disposed outside of the holder in the radial direction, with respect to an outer end of the metal portion in the radial direction of the holder.

4. The optical unit with a shake correction function according to claim 1 , wherein
an outer shape of the holder, when viewed from an optical axis direction being a direction of an optical axis of the camera module, is a square shape or a rectangular shape,
the magnet fixing portion includes two magnet fixing portions disposed on two adjacent sides of four sides of the holder whose outer shape is a square shape or a rectangular shape when viewed from the optical axis direction, and
the spherical body contact portion includes two spherical body contact portions disposed at two corner portions disposed on one of diagonal lines among four corner portions of the holder whose outer shape is a square shape or a rectangular shape when viewed from the optical axis direction.

5. The optical unit with a shake correction function according to claim 4 , wherein
one of the two spherical body contact portions is disposed between the two magnet fixing portions in a peripheral direction of the holder, and is formed integrally with the two magnet fixing portions.

6. The optical unit with a shake correction function according to claim 4 , wherein
the intermediate member is a plate spring,
the arm portion is disposed on an inner periphery of the holder, and configured to urge the spherical body toward the holder,
the holder is structured of a first holder portion and a second holder portion being divided on the other diagonal line where the spherical body contact portion is not disposed, when viewed from the optical axis direction, and
the first holder portion and the second holder portion being formed separately are fixed to each other.

Assignees

• Nidec Sankyo Corp

Inventors

• Minamisawa Shinji
• Arai Tsutomu
• Sue Takeshi

Classifications

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title

• H04N23/54

  Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils · CPC title

• H02K41/0354

  Lorentz force motors, e.g. voice coil motors · CPC title

• H04N23/687 Primary

  by shifting the lens or sensor position · CPC title

• G03B2205/0007

  Movement of one or more optical elements for control of motion blur · CPC title