Camera actuator, camera module, and camera mount device

Patent metadata

Field	Value
Publication number	US-12055839-B2
Application number	US-201917289325-A
Country	US
Kind code	B2
Filing date	Oct 25, 2019
Priority date	Nov 2, 2018
Publication date	Aug 6, 2024
Grant date	Aug 6, 2024

Abstract

This camera actuator is provided with a stationary-side member, a movable-side member which is provided to the stationary-side member in a displaceable manner and which holds a lens section, and a drive section which displaces the movable-side member in a plane including a first direction and a second direction which is perpendicular to the first direction. The movable-side member has a magnet affixation section for affixing a magnet section thereto such that the magnet section faces the stationary-side member, the magnet section being used for detecting the position of the movable-side member in either the first direction or the second direction. The surface of the magnet affixation section, to which the magnet section is mounted, is formed from metal.

First claim

What is claimed is:

1. A camera actuator, comprising:
a fixed-side member;
a movable-side member provided so as to be displaceable with respect to the fixed-side member and holding a lens part; and
a driving section that displaces the movable-side member in at least one direction of a first direction and a second direction orthogonal to the first direction, wherein:
the driving section includes a driving magnet and a position detecting magnet which is used to detect the position of the movable-side member in the one direction;
the movable-side member includes a first magnet fixing part and a second magnet fixing part that fixe the driving magnet and the position detecting magnet such that the driving magnet part and the position detecting magnet each faces the fixed-side member;
the first magnet fixing part and the second magnet fixing part are made of different metal members;
the first magnet fixing part is configured of a shield plate made of a magnetic metal; and
the second magnet fixing part is configured of a fixing plate made of a non-magnetic metal.

2. The camera actuator according to claim 1 , wherein:
the first magnet fixing part and the second magnet fixing part fixe the driving magnet and the position detecting magnet such that the driving magnet and the position detecting magnet are separated from the fixed-side member in an up-down direction orthogonal to a plane including the first direction and the second direction and a lower surface of the driving magnet and the position detecting magnet faces the fixed-side member, and
the first magnet fixing part and the second magnet fixing part respectively face upper surfaces of the driving magnet and the position detecting magnet.

3. The camera actuator according to claim 1 , wherein:
the movable-side member includes a body made of a resin, and
the first magnet fixing part and the second magnet fixing part are fixed to the body.

4. The camera actuator according to claim 3 , wherein
the first magnet fixing part and the second magnet fixing part each has a plate shape.

5. The camera actuator according to claim 4 , wherein
the first magnet fixing part and the second magnet fixing part each includes a locking part locked to the body.

6. The camera actuator according to claim 5 , wherein
the first magnet fixing part and the second magnet fixing part is each bonded to the body.

7. A camera module, comprising:
the camera actuator according to claim 1 ; and
an imaging element arranged at a stage subsequent to the lens part.

8. A camera mount device, comprising:
the camera module according to claim 7 ; and
a control section that controls the camera module.

9. A camera actuator, comprising:
a fixed-side member;
a movable-side member provided so as to be displaceable with respect to the fixed-side member and holding a lens part; and
a driving section that displaces the movable-side member within a plane including a first direction and a second direction orthogonal to the first direction, wherein:
the movable-side member includes a magnet fixing part that fixes a magnet part such that the magnet part faces the fixed-side member, the magnet part being used to detect a position of the movable-side member in one of the first direction and the second direction, and
the magnet fixing part includes an attachment surface made of a metal, the attachment surface being a surface to which the magnet part is attached, and
wherein:
the movable-side member includes a body made of a resin, and
the magnet fixing part is fixed to the body.

10. The camera actuator according to claim 9 , wherein:
the magnet fixing part fixes the magnet part such that the magnet part is separated from the fixed-side member in an up-down direction orthogonal to the plane and a lower surface of the magnet part faces the fixed-side member, and
the attachment surface faces an upper surface of the magnet part.

11. The camera actuator according to claim 9 , wherein
the attachment surface is made of a non-magnetic metal.

12. The camera actuator according to claim 9 , wherein
the magnet fixing part has a plate shape.

13. The camera actuator according to claim 12 , wherein
the magnet fixing part includes a locking part locked to the body.

14. The camera actuator according to claim 13 , wherein
the magnet fixing part is bonded to the body.

15. A camera module, comprising:
the camera actuator according to claim 9 ; and
an imaging element arranged at a stage subsequent to the lens part.

16. A camera mount device, comprising:
the camera module according to claim 15 ; and
a control section that controls the camera module.

Assignees

• Saito Masahiro
• Mitsumi Electric Co Ltd

Inventors

• Saito Masahiro

Classifications

• H04N23/50

  Constructional details · CPC title

• G02B7/09

  adapted for automatic focusing or varying magnification · CPC title

• G03B30/00

  Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles · CPC title

• G03B3/10

  Power-operated focusing · CPC title

• G03B2205/0007

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