Optical element driving mechanism

Patent metadata

Field	Value
Publication number	US-11678036-B2
Application number	US-202016845520-A
Country	US
Kind code	B2
Filing date	Apr 10, 2020
Priority date	Jun 14, 2019
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

An optical element driving mechanism is provided, including a fixed portion, a movable portion, a driving assembly, and a stopping assembly. The movable portion is movably connected to the fixed portion, wherein the movable portion is used for connecting to an optical element having a main axis. The driving assembly is disposed on the fixed portion or the movable portion, and the driving assembly is used for driving the movable portion to move relative to the fixed portion. The stopping assembly is connected to the movable portion and the fixed portion.

First claim

What is claimed is:

1. An optical element driving mechanism, comprising:
a fixed portion;
a movable portion movably connected to the fixed portion, wherein the movable portion is used for connecting to an optical element having a main axis; and
a driving assembly disposed on the fixed portion or the movable portion, and the driving assembly is used for driving the movable portion to move relative to the fixed portion, wherein the driving assembly comprises:
two first magnetic elements disposed on the movable portion; and
two second magnetic elements disposed on the fixed portion and corresponding to the first magnetic elements,

wherein the fixed portion comprises a case comprising a main body and a stopping portion, the stopping portion extends from the main body to the movable portion, and the stopping portion has a shape that is symmetrical relative to the main axis.

2. The optical element driving mechanism as claimed in claim 1 , wherein the material of the stopping portion comprises soft material, and the stopping portion is separated from the main body.

3. The optical element driving mechanism as claimed in claim 1 , wherein the material of the stopping portion comprises metal, and the stopping portion and the main body are formed as one piece.

4. The optical element driving mechanism as claimed in claim 1 , wherein the stopping portion has a circular shape.

5. The optical element driving mechanism as claimed in claim 1 , wherein the material of the movable portion comprises metal.

6. The optical element driving mechanism as claimed in claim 1 , wherein the movable portion comprises:
an arm portion extending away from the main axis; and
a contact element disposed on the arm portion.

7. The optical element driving mechanism as claimed in claim 6 , wherein the arm portion and the contact element are formed as one piece.

8. The optical element driving mechanism as claimed in claim 6 , wherein the arm portion and the contact element are formed separately.

9. The optical element driving mechanism as claimed in claim 6 , wherein the arm portion comprises a surface, a normal direction of the surface is parallel to the main axis, and the contact element is in direct contact with the surface.

10. The optical element driving mechanism as claimed in claim 1 , further comprising a first circuit board disposed on the fixed portion, wherein the first circuit board does not overlap the optical element when viewed along the main axis.

11. The optical element driving mechanism as claimed in claim 10 , further comprising a second circuit board disposed on the fixed portion, wherein the first circuit board does not overlap the second circuit board when viewed along the main axis.

12. The optical element driving mechanism as claimed in claim 11 , further comprising another optical element that does not overlap the first circuit board or the second circuit board in a direction that is parallel to the main axis.

13. The optical element driving mechanism as claimed in claim 10 , wherein the first circuit board overlaps the movable portion in a direction that is perpendicular to the main axis.

14. The optical element driving mechanism as claimed in claim 1 , wherein the driving assembly and the optical element are disposed on the movable portion, and the driving assembly, the optical element, and the movable portion overlap each other in a direction that is perpendicular to the main axis.

15. The optical element driving mechanism as claimed in claim 1 , further comprising an optical module, wherein the optical module comprises a driving component, the driving assembly and the driving component are disposed on opposite sides of the main axis, and the optical element is disposed in the optical module.

16. The optical element driving mechanism as claimed in claim 1 , further comprising a connecting element, wherein the connecting element comprises four extending portions and four connecting portions disposed on the extending portions, two of the connecting portions are connected to the movable portion, and the other two connecting portions are connected to the fixed portion.

17. The optical element driving mechanism as claimed in claim 16 , wherein the connecting portions connected to the movable portion are disposed on opposite sides of the main axis, and the connecting portions connected to the fixed portion are disposed on opposite sides of the main axis.

18. The optical element driving mechanism as claimed in claim 1 , wherein the movable portion comprises an accommodating portion, and the driving assembly is at least partially disposed in the accommodating portion.

Assignees

• Tdk Taiwan Corp

Inventors

• Hu Chao-Chang
• Chen Shu-Shan
• Fan Chen-Hsien
• Lee Yueh-Lin
• Lo Yu-Chiao
• Tsai Sung-Mao
• Chen Shang-Hung

Classifications

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• G03B13/36

  Autofocus systems · CPC title

• G03B2205/0069

  using electromagnetic actuators, e.g. voice coils · CPC title

• G02B7/026

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

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title