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

• US 10,451,956 B2
• Filed: 12/24/2015
• Issued: 10/22/2019
• Est. Priority Date: 12/26/2014
• Status: Active Grant

• Current Assignee: Mitsumi Electric Co., Ltd. (MinebeaMitsumi Inc.)
• Original Assignee: Mitsumi Electric Co., Ltd. (MinebeaMitsumi Inc.)
• Inventors: Kudo, Shota
• Primary Examiner(s): Nguyen, Thong Q
• Application Number:
  US15/539,409
• Publication Number:
  US 20170351158A1
• Time in Patent Office: 1,398 Days
• CPC Class Codes: G02B 27/646 compensating for small deviations, e.g. due to vibration or shake movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68
• CPC Class Codes: G02B 7/02 for lenses supports for magnifying lenses G02B25/002
• CPC Class Codes: G02B 7/04 with mechanism for focusing or varying magnification
• CPC Class Codes: G02B 7/08 adapted to co-operate with a remote control mechanism
• CPC Class Codes: G02B 7/09 adapted for automatic focusing or varying magnification
• CPC Class Codes: G03B 13/36 Autofocus systems
• CPC Class Codes: G03B 17/02 Bodies
• 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: G03B 5/04 Vertical adjustment of lens; Rising fronts
• CPC Class Codes: H02K 41/0356 moving along a straight path

Abstract

A lens driving device is provided with: a driving part including a movable part and a fixing part, a base member having a rectangular shape in plan view, wherein a shield cover is attached at a peripheral portion of the base member, and a side surface of the peripheral portion and a lower inner peripheral surface of the shield cover are bonded to each other, and a ground terminal part disposed in the base member. The base member includes at a first side of the peripheral portion a plurality of terminal housing parts recessed from the side surface. The ground terminal part includes a first ground terminal part integrally attached to the first side, and the first ground terminal part includes a plurality of ground terminals having different lengths, the ground terminals being respectively disposed in the plurality of terminal housing parts to be separated from the side surface.

Claims

1. A lens driving device comprising:

a driving part including a movable part comprising a lens holder and a fixing part where the movable part is fixed;

a base member having a rectangular shape in plan view, wherein a shield cover is attached at a peripheral portion of the base member, and a side surface of the peripheral portion and a lower inner peripheral surface of the shield cover are bonded to each other with an adhesive agent; and

a ground terminal part, wherein;

the base member includes at a first side of the peripheral portion a plurality of first terminal housing parts recessed from the side surface,

the ground terminal part includes a plurality of first ground terminal parts each of which is integrally attached to the first side and contacts the shield cover such that the ground terminal part and the shield cover are electrically connected, the plurality of first ground terminal parts being different from each other in length, and

each first ground terminal part disposed in a corresponding first terminal housing part of the plurality of first terminal housing parts such that a gap is formed to receive the adhesive agent between each first ground terminal part and the corresponding first terminal housing part in a direction of the length.

2. The lens driving device according to claim 1, wherein:

the base member includes at a second side opposite to the first side a plurality of second terminal housing parts recessed from the side surface;

the ground terminal part includes a plurality of second ground terminal parts each of which is integrally attached to the second side and contacts the shield cover such that the ground terminal part and the shield cover are electrically connected, the plurality of second ground terminal parts being different from each other in length; and

each second ground terminal part disposed in a corresponding second terminal housing part of the plurality of second terminal housing parts such that a gap is formed to receive the adhesive agent between each second ground terminal part and the corresponding second terminal housing part in a direction of the length.

3. The lens driving device according to claim 1, wherein the driving part includes an auto-focusing driving part including an auto-focusing coil part disposed at a periphery of the lens holder, and an auto-focusing magnet part disposed separately from the auto-focusing coil part in a radial direction, the auto-focusing driving part being configured to perform automatic focusing by moving, with respect to the fixing part including one of the auto-focusing coil part and the auto-focusing magnet part, the movable part including the other of the auto-focusing coil part and the auto-focusing magnet part in a light axis direction by use of a driving force of a voice coil motor composed of the auto-focusing coil part and the auto-focusing magnet part.

4. The lens driving device according to claim 1, wherein the driving part includes a shake-correcting driving part including a shake-correcting magnet part disposed in the movable part and a shake-correcting coil part disposed in the fixing part, the shake-correcting driving part being configured to perform shake correction by swaying the movable part with respect to the fixing part in a plane orthogonal to a 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.

5. A camera module configured to capture a subject image, the camera module comprising:

the lens driving device according to claim 1; and

the shield cover.

6. A camera mounting device that is an information apparatus or a transport apparatus, the camera mounting device comprising the camera module according to claim 5.