Lens drive device, and imaging device and electronic apparatus provided with same

Patent metadata

Field	Value
Publication number	US-10209479-B2
Application number	US-201615580203-A
Country	US
Kind code	B2
Filing date	Jun 7, 2016
Priority date	Jun 12, 2015
Publication date	Feb 19, 2019
Grant date	Feb 19, 2019

Abstract

A lens driving device having a leaf spring; a suspension wire, having one end thereof joined to the leaf spring; a supporting plate to which the other end portion of the suspension wire is joined; a lens retaining portion that is supported by the leaf spring and the suspension wire; and a driving portion for driving the lens retaining portion in a direction that is perpendicular to the optical axial direction of the lens. The leaf spring and/or the supporting plate is joined to the suspending wire through a joining material that is provided on a primary face, where the wettability of the primary face in respect to the joining material is greater than the wettability, in respect to the joining material, of the face on the opposite side from the primary face.

First claim

The invention claimed is:

1. A lens driving device comprising:
a leaf spring;
a suspension wire, wherein one end portion is joined to the leaf spring;
a supporting plate to which the other end portion of the suspension wire is joined;
a lens retaining portion for holding the lens, supported by the leaf spring and the suspension wire; and
a driver driving the lens retaining portion in a direction that is perpendicular to the optical axial direction of the lens,
wherein at least one of the leaf spring and the supporting plate is joined to the suspension wire through a joining material that is provided on a primary face; and
wherein the wettability of the primary face in respect to the joining material is higher than the wettability, in respect to the joining material, of the face that is on the opposite side from the primary face.

2. The lens driving device as set forth in claim 1 , wherein:
at least one of the leaf spring and the supporting plate has a through hole;
the suspension wire is inserted into the through hole; and
the primary face, on which the joining material is provided, is the face on the opposite side of the faces wherein the leaf spring and the supporting plate face each other.

3. The lens driving device as set forth in claim 1 , wherein:
the joining material is solder.

4. The lens driving device as set forth in claim 1 , further comprising:
a frame enclosing the lens retaining portion, wherein the lens retaining portion is supported by the leaf spring and the suspension wire through the frame.

5. The lens driving device as set forth in claim 1 , wherein:
the surface of the primary face of the joining material has, as a main component, gold, silver, tin, or copper; and
the surface of the face on the side that is opposite from the primary face has, as a main component, nickel or zinc.

6. The lens driving device as set forth in claim 1 , wherein:
at least one of the supporting plate and/or the leaf spring has at least one layer that is gold plating, silver plating, tin plating, solder plating, copper plating, zinc plating, and nickel plating.

7. The lens driving device as set forth in claim 1 , wherein:
the leaf spring, the suspension wire, and the supporting plate are electrically conductive.

8. The lens driving device as set forth in claim 1 , wherein the leaf spring comprises:
a joining portion that has the primary face that is joined to the suspension wire through the joining material, and that is provided with the joining material;
a connecting portion that protrudes from the outer edge of the joining portion;
an outer peripheral portion that surrounds the joining portion and the connecting portion, and to which one end of the connecting portion is joined; and
an arm portion that has a prescribed modulus of elasticity.

9. The lens driving device as set forth in claim 8 , wherein: the position, in the circumferential direction of the outer peripheral portion, wherein the connecting portion is joined to the outer peripheral portion, is the position that is furthest from the position to which the arm portion is joined to the outer peripheral portion.

10. The lens driving device as set forth in claim 8 , wherein: the modulus of elasticity of the connecting portion is greater than the prescribed modulus of elasticity of the arm portion.

11. The lens driving device as set forth in claim 8 , wherein:
the joining portion has a through hole into which the suspension wire is inserted.

12. The imaging device comprising a lens driving device as set forth in claim 1 .

13. The electronic device comprising a lens driving device as set forth in claim 1 .

Assignees

• Nidec Copal Corp

Inventors

• Matsuhisa Haruka
• Imai Kenzo

Classifications

• G03B2205/0015

  by displacing one or more optical elements normal to the optical axis · CPC title

• G02B27/646

  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 title

• G02B7/026 Primary

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

• G02B7/08

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

• G03B5/00

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