Lens driving mechanism and electronic device having the same

Patent metadata

Field	Value
Publication number	US-10416533-B2
Application number	US-201715590395-A
Country	US
Kind code	B2
Filing date	May 9, 2017
Priority date	Jul 18, 2016
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

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 lens driving mechanism for moving a lens unit along a light axis, comprising:
a frame, comprising plastic and having an opening and a holding portion integrally formed on an inner surface of the frame, wherein the holding portion has a U-shaped structure and forms two sidewalls extending along the light axis;
a base, fixed to and in contact with the frame, wherein a space is formed between the base and the frame;
a lens holder, movably disposed in the space for holding the lens unit, wherein an external light enters the space through the opening to the lens unit; and
a driving assembly, including a first magnetic element and a second magnetic element respectively disposed on the frame and the lens holder, to impel the lens unit and the lens holder to move along the light axis, wherein the holding portion holds the first magnetic element in a predetermined position on the inner surface of the frame, and the first magnetic element is located between the two sidewalls.

2. The lens driving mechanism as claimed in claim 1 , wherein the frame further has a protrusion, a top surface, and a side surface extended from an edge of the top surface and toward the base, wherein the protrusion protrudes from an inner surface of the frame and is located corresponding to an adjoining area between the top and side surfaces, to enhance the structural strength of the frame.

3. The lens driving mechanism as claimed in claim 2 , wherein the top surface has a quadrangular shape.

4. The lens driving mechanism as claimed in claim 1 , wherein the frame comprises metal.

5. The lens driving mechanism as claimed in claim 1 , further comprising a conductive wire directly formed on or in the frame by Molded Interconnect Device (MID) technology.

6. The lens driving mechanism as claimed in claim 1 , wherein the holding portion forms a U-shaped structure with the first magnetic element received therein.

7. The lens driving mechanism as claimed in claim 1 , wherein the first magnetic element comprises a magnet, and the second magnetic element comprises a coil with an electrical current applied thereto.

8. The lens driving mechanism as claimed in claim 7 , wherein the first magnetic element comprises a multipolar magnet.

9. The lens driving mechanism as claimed in claim 1 , wherein the lens holder has a protruding slider, and the frame further has a restricting structure with the slider received therein to restrict movement of the slider.

10. The lens driving mechanism as claimed in claim 9 , wherein the restricting structure has two restricting portions protruding from an inner surface of the frame, 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.

11. The lens driving mechanism as claimed in claim 9 , wherein the lens driving mechanism has a substantially polygonal structure and further comprises two driving assemblies disposed on two opposite sides thereof to move the lens unit along the light axis, wherein the slider and the restricting structure are situated on a side of the lens driving mechanism different from the two opposite sides where the driving assemblies are disposed.

12. The lens driving mechanism as claimed in claim 1 , wherein the frame forms a quadrangular shape and further has a plastic main body and a metal plate, the opening is formed on the main body, and the metal plate is disposed on a side of the main body.

13. The lens driving mechanism as claimed in claim 12 , wherein the metal plate forms a plurality of holes, and the main body forms a plurality of protruding portions engaged in the holes.

14. An electronic device, comprising:
the lens driving mechanism as claimed in claim 1 ;
a housing; and
a wireless communicating element, wherein the lens driving mechanism has a substantially polygonal structure, and the lens driving mechanism and the wireless communicating element are disposed in the housing, wherein the driving assembly is adjacent to a first side of the lens driving mechanism, and the wireless communicating element is adjacent to a second side of the lens driving mechanism different from the first side.

Assignees

• Tdk Taiwan Corp

Inventors

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

Classifications

• G03B2205/0053

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

• G03B17/12

  with means for supporting objectives, supplementary lenses, filters, masks, or turrets · CPC title

• G03B3/10 Primary

  Power-operated focusing · CPC title

• 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