Electromagnetic Optical Drive With Plastic Magnetic Element
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Solution Overview
Problem
The challenge in electronic devices, such as cameras, is to miniaturize the shutter or aperture mechanism while maintaining functionality and reliability, as existing solutions struggle to efficiently drive optical elements in a compact form.
Innovation Solution
A driving mechanism comprising a base, a movable unit with a magnetic element made of plastic, and a driving assembly with coils, which uses magnetic fields to move the optical element relative to the base, enhancing connection strength and magnetic field efficiency for miniaturization and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional shutter or aperture mechanisms are used, then the camera module can function properly, but the size of the mechanism becomes large and difficult to miniaturize
Solution Approach 1:
The patent replaces traditional mechanical shutter or aperture mechanisms with a magnetic field-driven system. A magnetic element is actuated by electromagnetic coils to move an optical element (shutter blade or aperture diaphragm) without complex mechanical linkages, achieving miniaturization while maintaining reliability through non-contact actuation
Solution Approach 2:
The patent changes the actuation method from mechanical to electromagnetic, utilizing magnetic field strength as the control parameter. By adjusting the current applied to the coils, the magnetic element's position is precisely controlled, enabling compact design with reliable optical element positioning
2Volume of moving object
If the driving mechanism is miniaturized, then the camera module size is reduced, but the magnetic field strength and connection strength may be compromised
Solution Approach 1:
The patent employs composite material strategies by integrating the magnetic element directly into the movable unit structure. The magnetic element is positioned to maximize magnetic field efficiency within the compact volume, and the connection portion is designed to optimize both mechanical strength and magnetic coupling, achieving high magnetic field strength in a miniaturized configuration
Solution Approach 2:
The patent applies local quality optimization by concentrating magnetic material strategically within the magnetic element and positioning it close to the optical element. The connection portion is designed with specific geometry to localize and intensify the magnetic field interaction zone, maximizing force generation within the constrained volume of the miniaturized driving mechanism
3Ease of manufacture
If the magnetic element is made of plastic material, then manufacturing complexity is reduced and connection strength is improved, but magnetic field efficiency may be affected
Solution Approach 1:
The patent uses composite materials by embedding magnetic particles or powder within a plastic matrix to create the magnetic element. This composite structure combines the manufacturing advantages of plastic (injection molding capability, structural integration) with the magnetic properties needed for actuation, achieving both ease of manufacture and adequate magnetic field efficiency
Solution Approach 2:
The patent optimizes the magnetic properties of the plastic magnetic element by adjusting parameters such as magnetic particle concentration, particle size distribution, and orientation during molding. These parameter changes enable the plastic magnetic element to generate sufficient magnetic field interaction force while maintaining the manufacturing simplicity and structural integration advantages of plastic material
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
The solution effectively miniaturizes the driving mechanism, improves reliability, and enhances the magnetic field strength, allowing for efficient movement of optical elements while preventing structural damage from external impacts, thus addressing the challenge of compact camera module design.
Implementation Method 1
the driving assembly has a coil, and the magnetic element and the movable unit move relative to the base when an electrical current is applied to the coil
Implementation Method 2
the driving assembly is configured to drive the movable unit to move relative to the base, wherein the driving assembly has a coil, and the magnetic element and the movable unit move relative to the base when an electrical current is applied to the coil
Data Source
AI summary
A driving mechanism is provided, including a base, a movable unit, a magnetic element, and a driving assembly. The movable unit is movably disposed on the base. The magnetic element is disposed on the movable unit and has plastic material. The driving assembly is configured to drive the movable unit to move relative to the base, wherein the driving assembly has a coil, and the magnetic element and the movable unit move relative to the base when an electrical current is applied to the coil.