Lens driving mechanism and electronic device having the same

Patent metadata

Field	Value
Publication number	US-10816874-B2
Application number	US-201916534265-A
Country	US
Kind code	B2
Filing date	Aug 7, 2019
Priority date	Jul 18, 2016
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A lens driving mechanism is provided for moving a lens unit along a light axis, including a frame, a base, a lens holder, and a driving assembly. The frame has plastic material and forms an opening. The base is in contact with and fixed to the frame, wherein a space is formed between the base and the frame. The lens holder is movably disposed in the space for holding the lens unit, wherein an external light enters the space through the opening to the lens unit. The driving assembly is disposed in the space and is connected to the lens holder and the frame, to impel the lens unit to move along the light axis.

First claim

What is claimed is:

1. A driving mechanism for moving an optical element, comprising:
a fixed part, having a frame and a base affixed to the frame, wherein the frame has a top surface and four side surfaces extending from the top surface toward the base;
a movable part for holding the optical element that defines an light axis, wherein the movable part is movable relative to the fixed part, and the frame is shaped in a rectangle when viewed along the light axis;
a driving assembly for driving the movable part to move relative to the fixed part, wherein the driving assembly has a first magnetic element; and
a relative movement restricting means formed on the movable part and the fixed part, to restrict movement of the movable part relative to the fixed part,
wherein the relative movement restricting means has a first structure formed on the movable part and a second structure integrally formed on an inner surface of the frame, and the first structure is concealed by the second structure in a radial direction of the optical element that is perpendicular to the light axis.

2. The driving mechanism as claimed in claim 1 , wherein the fixed part comprises plastic material.

3. The driving mechanism as claimed in claim 1 , wherein the relative movement restricting means restricts movement of the movable part relative to the fixed part in a direction perpendicular to the light axis.

4. The driving mechanism as claimed in claim 1 , wherein the relative movement restricting means restricts rotation of the movable part relative to the fixed part around the light axis.

5. The driving mechanism as claimed in claim 1 , wherein the second structure is shaped corresponding to the first structure.

6. The driving mechanism as claimed in claim 5 , wherein the first structure has a convex shape, and the second structure has a concave shape corresponding to the convex shape of the first structure.

7. The driving mechanism as claimed in claim 6 , wherein the first structure is movably received in the second structure.

8. The driving mechanism as claimed in claim 6 , wherein when viewed in a direction perpendicular to the light axis, the first structure at least partially overlap the second structure.

9. The driving mechanism as claimed in claim 1 , wherein when viewed in a direction parallel to the light axis, the first magnetic element does not overlap the movable part.

10. The driving mechanism as claimed in claim 1 , wherein the fixed part has a holding portion protruding from the inner surface of the fixed part for holding the first magnetic element, and the first magnetic element and the holding portion respectively have a first end surface and a second end surface facing a light emitting end of the driving mechanism, wherein the first and second end surfaces are located at different heights along the light axis.

11. The driving mechanism as claimed in claim 10 , wherein the first end surface of the first magnetic element is closer to the light emitting end than the second end surface of the holding portion.

12. The driving mechanism as claimed in claim 1 , further comprising a first resilient member and a second resilient member respectively connected to opposite sides of the movable part, wherein the first and second resilient members respectively have a first portion and a second portion affixed to the fixed part, and the first and second portions do not overlap when viewed along the light axis.

13. The driving mechanism as claimed in claim 1 , wherein the first structure comprises a slider protruding from the movable part and slidable received in the second structure to restrict movement of the movable part relative to the fixed part.

14. The driving mechanism as claimed in claim 13 , wherein the second structure has two restricting portions protruding from the inner surface of the fixed part, and a recess is formed between the two restricting portions and extended along the light axis, wherein the width of the recess exceeds that of the slider.

15. The driving mechanism as claimed in claim 1 , wherein the driving assembly further has a second magnetic element, and the first and second magnetic elements are respectively disposed on the fixed part and the movable part.

16. The driving mechanism as claimed in claim 15 , wherein the first magnetic element comprises a magnet, and the second magnetic element comprises a coil.

17. The driving mechanism as claimed in claim 15 , wherein the fixed part comprises plastic material.

18. The driving mechanism as claimed in claim 15 , wherein the movable part is received in a space formed between the base and the frame.

19. The driving mechanism as claimed in claim 18 , wherein the frame has an opening, and an external light enters the space through the opening to the optical element.

20. The driving mechanism as claimed in claim 1 , further comprising a conductive wire directly formed on/in the fixed part by Molded Interconnect Device (MID) technology.

Assignees

• Tdk Taiwan Corp

Inventors

• Hsu Shang-Yu
• Liu Shou-Jen
• Hsu Chia-Pin

Classifications

• H04N23/69

  Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming · CPC title

• H04N23/55

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

• G03B3/10 Primary

  Power-operated focusing · CPC title

• G03B7/08

  Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device · CPC title

• G03B29/00

  Combinations of cameras, projectors or photographic printing apparatus with non-photographic non-optical apparatus, e.g. clocks or weapons; Cameras having the shape of other objects (combinations with flash apparatus G03B15/03) · CPC title