Lens driving device

• US 10,444,465 B2
• Filed: 01/31/2018
• Issued: 10/15/2019
• Est. Priority Date: 12/30/2015
• Status: Active Grant

• Current Assignee: Changzhou Raytech Optronics Co., Ltd.
• Original Assignee: AAC Technologies Pte Limited (AAC Technologies Holdings Inc.)
• Inventors: Yan, Xudong, Wang, Jing
• Primary Examiner(s): Choi, William
• Application Number:
  US15/884,453
• Publication Number:
  US 20180149825A1
• Time in Patent Office: 622 Days
• Field of Search: 359822-826
• CPC Class Codes: G02B 7/023 permitting adjustment
• CPC Class Codes: G02B 7/08 adapted to co-operate with a remote control mechanism
• CPC Class Codes: G11B 7/0908 for focusing only G11B7/0925, G11B7/094, G11B7/0941, G11B7/0943, G11B7/0945, G11B7/0946, G11B7/0948 take precedence
• CPC Class Codes: G11B 7/0927 for focusing only G11B7/0937 takes precedence

Abstract

A lens driving device includes a housing with an accommodation space, a barrel accommodated in the housing, a coil wound around the barrel and a magnet fixed to the housing. The lens driving device further includes a spring piece at least partially made of amorphous alloy materials, and the spring piece support the described barrel to perform the to-and-fro motion along the axis. Comparing to the relevant technologies, the lens driving device has good performance and high reliability.

Claims

1. A lens driving device, comprising:

a housing with an accommodation space;

a barrel accommodated in the housing;

a coil wound around the barrel;

a magnet fixed to the housing; and

a spring piece made of amorphous alloy materials for supporting the barrel in the housing;

wherein the spring includes an upper spring piece and a lower spring piece made of amorphous material, and the upper spring piece fixes and supports the upper end of the barrel in the barrel, and the lower spring piece fixes and supports the lower end of the barrel in the barrel;

wherein the lower spring piece includes a first lower spring piece and a second lower spring piece;

the first lower spring piece and the second lower spring piece are located coplanar with each other and insulated from each other.

2. The lens driving device as described in claim 1, wherein the amorphous alloy material is Zr—

Al—

Ni—

Cu—

Y or Zr—

Al—

Ni—

Cu—

Be.

3. The lens driving device as described in claim 1, wherein the amorphous alloy material is an amorphous coating layer or a physical vapor deposition layer.

4. The lens driving device as described in claim 1, wherein the upper spring piece includes an internal fixing arm fixing to the upper end of the barrel, an external fixing arm fixed to the housing, and a plurality of spring arms connecting the internal fixing arm to the external fixing arm.

5. The lens driving device as described in claim 4, wherein the spring arm has a wavy shape.

6. The lens driving device as described in claim 1, wherein the lower spring piece is made of amorphous alloy material.