# US 7,609,956 B2 · Compact camera module

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- Number: US 7,609,956 B2
- Document ID: US7609956B2
- Status: Granted
- Kind: B2
- Application number: 11/656,493
- Filed: 2007-01-23
- Published: 2007-09-13
- Granted: 2009-10-27
- Earliest claimed: 2006-03-08
- Assignees: ASUSTeK COMPUTER INC.
- Inventors: Huei-Min Huang; Wei-Pang Lee
- Web page: https://patentgrep.com/patent/US7609956B2

## CPC

- G03B 9/08: Shutters
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)

## Abstract

A compact camera module includes multiple hollow cylinders, a voice coil motor and a torsion spring. An intervening cylinder is mounted on a base. An upright rail is disposed on the intervening cylinder and perpendicular to a support plane of the base. An inner cylinder has a zoom lens inside and at least one moving component, wherein the inner cylinder is disposed in a hollow space of the intervening cylinder and the moving component slides within the upright rail. An outer cylinder is disposed around the intervening cylinder. The outer cylinder has a sloping rotational rail supporting the moving component. A wire coil is secured around the outer cylinder. A torsion spring encircles the outer cylinder and is secured to the base and the wire coil at two ends. A magnet-generating device is disposed around the wire coil and secured on the base.

## Claims

### Claim 1

A compact camera module, comprising:
a base, having an intervening cylinder;
at least one upright rail, disposed on the intervening cylinder and perpendicular to a support plane of the base;
an inner cylinder, having a zoom lens inside and at least one moving component, wherein the inner cylinder is disposed in a hollow space of the intervening cylinder and the moving component slides within the upright rail;
a hollow outer cylinder, disposed around the intervening cylinder, the hollow outer cylinder having a sloping rotation rail applied to the moving component for sliding;
at least one wire coil, secured around the outer cylinder;
at least one torsion spring, encircling the outer cylinder and secured to the base and the wire coil at two ends; and
a magnet-generating device, disposed around the wire coil and secured on the base,
when the wire coil is electrified, an interaction between the magnetic field of the wire coil and the magnetic field of the magnet-generating device rotates the outer cylinder, the sloping rotation rail raises or lowers the moving component along the upright rail so as to raise or lower the inner cylinder and the zoom lens inside thereof, the rotated outer cylinder deforms the torsion spring,
when the wire coil is not electrified, the deformed torsion spring drives the outer cylinder to rotate to an original position.

### Claim 2 (depends on 1)

The compact camera module of claim 1, wherein the upright rail is a strip-shaped cutout of the intervening cylinder.

### Claim 3 (depends on 1)

The compact camera module of claim 1, wherein the rotation rail is a strip-shaped cutout of the outer cylinder.

### Claim 4 (depends on 1)

The compact camera module of claim 1, further comprising a cover disposed on top of the base and exposing the zoom lens.

### Claim 5 (depends on 1)

The compact camera module of claim 1, wherein the magnet-generating device includes a hollow cylinder-shaped yoke and at least one magnet, the magnet is attached on an inner wall of the hollow cylinder-shaped yoke.

### Claim 6 (depends on 1)

The compact camera module of claim 1, wherein the wire coil is electrified by the power through the torsion spring.

### Claim 7

A compact camera module, comprising:
a base, having an intervening cylinder;
at least one upright rail, disposed on the intervening cylinder and perpendicular to a support plane of the base;
an inner cylinder, having a zoom lens inside and at least one moving component, wherein the inner cylinder is disposed in a hollow space of the intervening cylinder and the moving component slides within the upright rail;
a hollow outer cylinder, disposed around the intervening cylinder, the hollow outer cylinder has a sloping rotation rail applied to the moving component for sliding;
at least one magnet, secured around the outer cylinder;
at least one torsion spring, encircling the outer cylinder and secured to the base and the wire coil at two ends;
a hollow cylinder-shaped yoke, secured on the base; and
at least one wire coil, disposed around the magnet and secured on the hollow cylinder-shaped yoke,
when the wire coil is electrified, an interaction between the magnetic field of the wire coil and the magnetic field of the magnet rotates the outer cylinder, the sloping rotation rail raises or lowers the moving component along the upright rail so as to raise or lower the inner cylinder and the zoom lens inside thereof, the rotated outer cylinder deforming the torsion spring,
when the wire coil is not electrified, the deformed torsion spring drives the outer cylinder to rotate to a original position.

### Claim 8 (depends on 7)

The compact camera module of claim 7, wherein the upright rail is a strip-shaped cutout of the intervening cylinder.

### Claim 9 (depends on 7)

The compact camera module of claim 7, wherein the rotation rail is a strip-shaped shaped cutout of the outer cylinder.

### Claim 10 (depends on 7)

The compact camera module of claim 7, further comprising a cover disposed on top of the base and exposing the camera.