Camera module

Patent metadata

Field	Value
Publication number	US-10845569-B2
Application number	US-201816051771-A
Country	US
Kind code	B2
Filing date	Aug 1, 2018
Priority date	Sep 11, 2017
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

Disclosed is a camera module that comprises a lens assembly that includes a lens base and a lens tube integrated with the lens base for receiving at least one lens; and a voice coil motor assembly for driving the lens assembly, comprising a base, two leaf springs, at least two coils, and at least two magnets. The coils are respectively fixed on two opposite sides of the base, the magnets are fixed on two opposite sides of the lens assembly respectively, and the magnets are located by inner sides of the coils respectively, the lens assembly is clamped by the leaf springs and supported on the base, the coils drive the magnets and the lens assembly to move after being energized. The camera module is simply structured, easy to assembly, less bulky and fit for the demand of thin products.

First claim

What is claimed is:

1. A camera module, comprising:
a lens assembly that includes a lens base and a lens tube integrated with the lens base for receiving at least one lens; and
a voice coil motor assembly for driving the lens assembly that includes a base, an upper leaf spring, a lower leaf spring, at least a first coil and a second coil, and at least a first magnet and a second magnet;
wherein the first and second coils are respectively fixed on two opposite sides of the base, the first and second magnets are fixed on two opposite sides of the lens assembly, and the first and second magnets are located by inner sides of the first and second coils respectively, the lens assembly is clamped by the upper and lower leaf springs and supported on the base, the first and second coils drive the first and second magnets and the lens assembly to move after being energized, and an end of the first coil and an end of the second coil are respectively welded to pins of two of a plurality of fixed columns protruding from a surface of the base.

2. The camera module according to claim 1 , wherein each of the coils bridges over two of the plurality of fixed columns and is located at an outer side of the two fixed columns.

3. The camera module according to claim 2 , wherein magnet accommodating portions are configured on the two opposite outer sides of the lens base for accommodating the magnets respectively, an accommodating room is formed between the two fixed columns on each of the opposite sides of the lens base, the magnet located on the same side is accommodated in the magnet accommodating portion and adjacent to the coil on the side.

4. The camera module according to claim 2 , wherein a first end of the first coil is connected to a first end of the second coil via a wire, a groove is disposed on the base, the wire is embedded in the groove of the base.

5. The camera module according to claim 4 , wherein a step portion and a sunken portion are formed on the base, the plurality of fixed columns are secured on the step portion, and the groove is disposed on the sunken portion.

6. The camera module according to claim 1 , wherein a protrusion is disposed on each of the plurality of fixed columns, the upper leaf spring is arranged on an upper surface of the lens assembly and connected to the protrusions, and the upper leaf spring lies on the upper surfaces of the magnets partly.

7. The camera module according to claim 1 , wherein the second end of the first coil and the end of the second coil are welded on the lateral surfaces of the two fixed columns via the pins and one end of each one of the pins protrudes through the base outwardly.

8. The camera module according to claim 1 , wherein the lower leaf spring is arranged on an upper surface of the base.

9. The camera module according to claim 1 , wherein a step portion and a sunken portion are formed on the base and the plurality of fixed columns are secured on the step portion.

10. The camera module according to claim 1 , wherein the camera module further comprises a housing that covers the lens assembly and the voice coil motor assembly.

Assignees

• Sae Magnetics Hk Ltd

Inventors

• Ho Yiu Sing
• Gao Shou Sheng
• Shi Zong Qin

Classifications

• H04N23/54

  Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils · CPC title

• H04N23/55

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

• H02K41/00

  Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path {(electromagnetic launchers F41B6/00)} · CPC title

• H02K41/0356

  moving along a straight path · CPC title

• G02B7/08

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