Compact Lens Drive Layout for Dead Space Reduction
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Solution Overview
Problem
Existing lens driving apparatuses face challenges in minimizing dead space, which is essential for fabricating compact camera-equipped electronic devices.
Innovation Solution
The lens driving apparatus incorporates a base, housing, yoke, bobbin, coil, and magnets, with a spring mechanism to minimize dead space and enable compact design, allowing for efficient movement of the lens module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the lens driving apparatus uses conventional structural components and arrangements, then the device can be manufactured with standard processes, but the dead space is not minimized and the overall size is larger
Solution Approach 1:
The patent merges the coil and magnet components into a closely integrated electromagnetic driving unit, reducing the gap between them and minimizing dead space. The coil is positioned to closely surround the magnet assembly, eliminating unnecessary structural gaps while maintaining functional independence of each component.
Solution Approach 2:
The patent implements a nested arrangement where the coil is positioned to closely surround the magnet and bobbin assembly. The bobbin is nested within the coil structure, and the magnet is positioned within the bobbin assembly, creating a compact nested configuration that minimizes dead space while maintaining functional integrity.
2Volume of moving object
If the lens driving apparatus is designed for compact size, then electronic devices can be made smaller, but the manufacturing precision requirements increase
Solution Approach 1:
The patent divides the lens driving apparatus into distinct modular segments: base, housing, yoke, bobbin, coil, magnet, and spring components. Each segment is designed and manufactured separately with standardized interfaces, allowing for precise assembly while maintaining overall compact dimensions. The modular segmentation enables independent optimization of each component's manufacturing precision.
Solution Approach 2:
The patent applies different precision requirements to different regions of the apparatus. Critical interfaces such as the coil-magnet gap and bobbin-yoke connections require high manufacturing precision, while non-critical areas use standard tolerances. This localized quality approach minimizes overall manufacturing complexity while ensuring precise component alignment where needed.
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 design allows for the fabrication of a lens driving apparatus in a small size with minimized dead space, effectively addressing the need for compact camera systems in electronic devices.
Implementation Method 1
a coil fixedly disposed around the bobbin; a plurality of magnets provided at the vertical plate of the yoke to face the coil
Implementation Method 2
a spring installed on at least one of upper and lower portions of the yoke to return the bobbin, which has moved up due to interaction between the magnet and the coil, to its initial position
Data Source
AI summary
Disclosed is a lens driving apparatus. The lens driving apparatus includes a base formed at a center thereof with a first opening; a housing coupled with the base and having a second opening corresponding to the first opening; a yoke installed on the base and including a horizontal plate having a third opening corresponding to the first opening and a vertical plate protruding upward from the horizontal plate; a bobbin movably installed in the yoke and coupled with a lens module; a coil fixedly disposed around the bobbin; a plurality of magnets provided at the vertical plate of the yoke to face the coil; and a spring installed on at least one of upper and lower portions of the yoke to return the bobbin, which has moved up due to interaction between the magnet and the coil, to its initial position.