Lens drive apparatus

Patent metadata

Field	Value
Publication number	US-9804354-B2
Application number	US-201314655411-A
Country	US
Kind code	B2
Filing date	Oct 1, 2013
Priority date	Dec 26, 2012
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A part ( 91, 92 ) of a lower plate spring ( 9 ) of a lens driving device ( 1 ) includes a base-fixed section ( 911, 921 ) fixed to a base ( 11 ), a lens holder fixing section ( 912, 922 ) fixed to a lens holder ( 8 ), and an arm section ( 913, 923 ) connecting the base-fixed section ( 911, 921 ) and the lens holder fixing section ( 912, 922 ) to each other, the base-fixed section ( 911, 921 ) including a terminal connection section ( 911 b, 921 b ) near which an elastic section ( 911 c, 921 c ) is provided.

First claim

The invention claimed is:

1. A lens driving device comprising:
a movable body configured to hold a lens and to move along an optical axis of the lens;
a driving mechanism configured to drive the movable body along the optical axis;
a plate spring configured to support the movable body in such a manner that the movable body is movable along the optical axis; and
a base section to which the plate spring is attached,
the driving mechanism including a driving coil to be attached to the movable body,
the base section comprising a terminal attached thereto for supplying electric current to the driving coil,
the plate spring including:
a movable-body-fixed section fixed to the movable body and having a connection section electrically connected to the driving coil;
a base-section-fixed section fixed to the base section, the base-section-fixed section including a first portion and a second portion;
an arm section configured to connect the movable-body-fixed section and the base-section-fixed section to each other;
a terminal connection section electrically connected to the terminal;
an elastic section connecting the base-section-fixed section and the terminal connection section to each other and urging the terminal connection section to the terminal, the elastic section including (i) a first elastic portion connecting the first portion of the base-section-fixed section and the terminal connection section to each other and (ii) a second elastic portion connecting the second portion of the base-section-fixed section and the terminal connection section to each other.

2. The lens driving device as set forth in claim 1 , wherein the terminal (i) comprises a portion connected to the terminal connection section which portion is in a plate shape.

3. The lens driving device as set forth in claim 1 , wherein the terminal connection section and the terminal are connected to each other by laser welding.

4. The lens driving device as set forth in claim 1 , wherein:
the base section includes (i) the plurality of spring fixing sections each comprising an upper portion to which the base-section-fixed section is fixed and (ii) a terminal fixing section comprising an upper portion to which the terminal is attached;
the terminal includes a plate spring connection section comprising an upper portion to which the terminal connection section is fixed; and
in a state in which the terminal is attached to the terminal fixing section, a sum, at the plate spring connection section, of a thickness of the terminal and a height of the terminal fixing section is larger than a height of the plate spring fixing section.

Assignees

• Sharp Kk

Inventors

• Kasuga Kyoji

Classifications

• G02B7/026 Primary

  using retaining rings or springs (G02B7/027 takes precedence) · CPC title

• G03B5/00

  Adjustment of optical system relative to image or object surface other than for focusing · CPC title

• H02K41/0356

  moving along a straight path · CPC title

• G03B2205/0053

  Driving means for the movement of one or more optical element · CPC title

• G02B7/08

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