Actuator Motion Control Mechanism for Miniature Camera Shock Resistance
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Solution Overview
Problem
Miniature cameras in electronic devices face challenges in reducing size while maintaining shock resistance, as smaller components are more delicate and prone to damage from rough handling.
Innovation Solution
A motion control mechanism is integrated within the actuator device to allow precise movement of optical elements, such as lenses, along a desired axis while inhibiting rotation and lateral motion, using MEMS actuators and advanced fabrication techniques like etching and micromachining, enhancing the camera's structural integrity and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of miniature cameras is reduced, then the size of electronic devices is reduced, but the shock resistance deteriorates
Solution Approach 1:
The actuator is integrated within the motion control mechanism housing, combining multiple functions (actuation, motion control, and shock protection) into a single compact unit. This merging eliminates the need for separate protective structures while maintaining shock resistance through the inherent rigidity of the integrated design.
Solution Approach 2:
The actuator is contained within the motion control mechanism, which itself is part of the camera assembly. This nested arrangement allows compact packaging where smaller components are housed within larger structures, achieving miniaturization without compromising the protective function of outer housings against shock.
2Volume of moving object
If the size of miniature cameras is reduced, then the size of electronic devices is reduced, but the component delicacy increases
Solution Approach 1:
Multiple functional components are merged into integrated assemblies, reducing the number of separate delicate parts. The motion control mechanism integrates the actuator, platform, and guiding structures into a single robust unit, minimizing component count and potential failure points.
Solution Approach 2:
The motion control mechanism employs precise mechanical constraints and guiding structures that provide rigid support to delicate optical components while maintaining overall compactness. The platform and actuator housing form protective enclosures that shield internal components from external shocks.
3Manufacturing precision
If motion control precision is improved, then optical element alignment is improved, but device complexity increases
Solution Approach 1:
The patent employs a voice coil actuator that uses electromagnetic fields to achieve precise motion control, replacing complex mechanical positioning systems with multi-stage gears and linkages. This electromagnetic actuation method provides fine positional control through electrical signal modulation while maintaining a relatively simple mechanical structure.
Solution Approach 2:
The motion control mechanism is designed to perform multiple functions: the voice coil actuator provides both coarse and fine positioning, the platform serves as both a mounting surface and a motion constraint structure, and the housing provides both structural support and shock protection. This multi-functionality reduces the need for dedicated components for each function.
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
This solution enables the creation of smaller, more robust miniature cameras with improved shock resistance and reliability, suitable for various electronic devices, by ensuring precise motion control and alignment of optical components, thus addressing the size and durability concerns.
Implementation Method 1
Such actuators typically comprise voice coils that are used to move a lens for focusing, zooming, or optical image stabilization
Data Source
AI summary
A device can comprise an outer frame, a platform, and a motion control mechanism. The motion control mechanism can be adapted to permit movement of the platform in a desired direction with respect to the outer frame and inhibit rotation of the platform with respect to the outer frame. An actuator can be contained at least partially within the motion control mechanism.