Lens-driving device, camera module, and camera mount device

Patent metadata

Field	Value
Publication number	US-10684532-B2
Application number	US-201515539761-A
Country	US
Kind code	B2
Filing date	Dec 24, 2015
Priority date	Dec 26, 2014
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

This lens-driving device is provided with: a shake correction drive unit which, utilizing the drive power of a voice coil motor, causes a moveable shake correction unit that includes a shake correction magnet unit to oscillate within a plane orthogonal to the optical axis with respect to a stationary shake correction unit that includes a shake correction magnet unit, in order to carry out shake correction; and a plurality of suspension wires for supporting the moveable shake correction unit with respect to the stationary shake correction unit. The moveable shake correction unit has a retaining member for retaining the shake correction magnet unit, and the retaining member has a wire passage part recessed inwardly in the diametrical direction and formed to have an inside diameter at the bottom which is larger than the inside diameter at the top, a suspension wire being arranged in the retaining member.

First claim

The invention claimed is:

1. A lens driving device comprising:
a shake-correcting driving part including a shake-correcting magnet part disposed at a periphery of a lens part, and a shake-correcting coil part disposed separately from the shake-correcting magnet part in a light axis direction, the shake-correcting driving part being configured to perform shake correction by swaying a shake correction movable part including the shake-correcting magnet part with respect to a shake correction fixing part including the shake-correcting coil part in a plane orthogonal to the light axis direction by use of a driving force of a voice coil motor composed of the shake-correcting coil part and the shake-correcting magnet part; and
a plurality of suspension wires configured to support the shake correction movable part with respect to the shake correction fixing part, wherein:
the shake correction movable part includes a holding member configured to hold the shake-correcting magnet part,
the holding member includes, on an outer periphery thereof, a wire insertion part where the suspension wire is disposed, the wire insertion part being recessed inward in a radial direction such that an internal diameter of a lower portion is larger than an internal diameter of an upper portion,
the shake correction movable part includes an auto-focusing driving part including an auto-focusing coil part disposed at a periphery of the lens part, and an auto-focusing magnet part disposed separately from the auto-focusing coil part in the radial direction, the auto-focusing driving part being configured to perform automatic focusing by moving, with respect to an auto focus fixing part including one of the auto-focusing coil part and the auto-focusing magnet part, an auto focus movable part including the other of the auto-focusing coil part and the auto-focusing magnet part in the light axis direction by use of a driving force of a voice coil motor composed of the auto-focusing coil part and auto-focusing magnet part,
the shake correction movable part includes an elastic supporting member having a rectangular shape in plan view, the elastic supporting member being configured to support the auto focus movable part such that the auto focus movable part is separated from the auto focus fixing part in a direction orthogonal to the light axis direction,
the elastic supporting member includes:
a first link part extending from a supporting member main body toward an apex of a corner of the rectangular shape of the elastic supporting member;
a wire connecting part where an end portion of the suspension wire is connected, the wire connecting part being disposed at an inner position in the radial direction with respect to the apex of the corner; and
a second link part extending inward in the radial direction from an end portion of the first link part to be connected to the wire connecting part at an inner end of the second link part in the radial direction,

the holding member has a rectangular shape in its plan view, and
the outer periphery of the holding member comprises:
a first substantially-flat face extending along each side of the rectangular shape of the holding member;
a semi-conical face formed as the wire insertion part at each corner of the rectangular shape of the holding member; and
a second substantially-flat face extending between an edge of the first substantially-flat face and an edge of the semi-conical face in a direction transverse to both the first substantially-flat face and the semi-conical face, wherein
a lower side of the second substantially-flat face is narrower than an upper side of the second substantially-flat face.

2. The lens driving device according to claim 1 , wherein the wire insertion part has a truncated cone shape whose internal diameter gradually changes.

3. The lens driving device according to claim 1 , wherein the wire insertion part has a multistep shape whose internal diameter changes stepwise.

4. The lens driving device according to claim 1 , wherein:
the first link part extends to reach the apex of the corner of the rectangular shape of the elastic supporting member, and
the second link part extends inward in the radial direction from the end portion of the first link part, the end portion of the first link part being positioned at the apex of the corner of the rectangular shape of the elastic supporting member.

5. The lens driving device according to claim 1 , wherein:
the first link part extends not to reach the apex of the corner of the rectangular shape of the elastic supporting member, and
the second link part extends to be bent inward in the radial direction from the end portion of the first link part.

6. A camera module comprising:
the lens driving device according to claim 1 ;
a lens part that is mounted at to the shake correction movable part; and
an image capturing part configured to capture a subject image imaged with the lens part.

7. A camera mounting device that is an information apparatus or a transport apparatus, the camera mounting device comprising the camera module according to claim 6 .

Assignees

• Kudo Shota
• Mitsumi Electric Co Ltd

Inventors

• Kudo Shota

Classifications

• H04N23/60

  Control of cameras or camera modules · CPC title

• G02B7/08 Primary

  adapted to co-operate with a remote control mechanism · CPC title

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• H04N23/57

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

• H04N23/687

  by shifting the lens or sensor position · CPC title