Compact Camera Module Hollow Cylinder Guide Structure
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Solution Overview
Problem
Conventional compact camera modules with voice coil motors and guide structures made of spring or metal wire are prone to malfunction and lens tilt upon impact due to their fragile nature.
Innovation Solution
A compact camera module design utilizing multiple hollow cylinders, a voice coil motor, and a torsion spring, where the hollow cylinders guide the zoom lens, and the torsion spring provides recovery force, with a magnet-generating device interacting with the wire coil to adjust the lens position and return to original position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a guide structure made of spring or metal wire is used to guide the zoom lens, then the lens can be adjusted, but the structure becomes fragile and prone to malfunction upon impact
Solution Approach 1:
The guide structure is divided into multiple hollow cylinders (first hollow cylinder, second hollow cylinder, third hollow cylinder) that guide the zoom lens at different levels. This segmentation distributes the mechanical stress and provides multiple independent guidance paths, preventing single-point failure upon impact while maintaining lens adjustment capability.
Solution Approach 2:
The guide structure combines multiple hollow cylinders with different functions: the first hollow cylinder provides primary guidance, the second hollow cylinder provides additional support, and the third hollow cylinder offers further stabilization. This composite structural approach creates a robust guide system that resists impact forces while enabling smooth lens movement.
2Measurement precision
If a voice coil motor is used to drive the zoom lens, then precise lens adjustment is achieved, but the device complexity increases
Solution Approach 1:
The voice coil motor components (magnet, coil, yoke) are merged into a compact integrated assembly that directly couples with the hollow cylinder structure. The magnet is positioned within the hollow cylinder, the coil wraps around it, and the yoke provides structural support, creating a space-efficient motor unit that reduces overall device complexity while maintaining precise lens positioning capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the durability and functionality of the camera module by providing a robust guide structure that maintains lens adjustment and recovery capabilities, reducing the risk of malfunction upon impact.
Implementation Method 1
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 causes the outer cylinder to rotate
Implementation Method 2
The rotated outer cylinder further 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
Data Source
AI summary
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.