Continuous Zoom Lens Barrel Drive With Segmented Coil-Magnet Layout
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Solution Overview
Problem
Existing continuous zoom camera apparatuses face issues with non-uniform coil and magnet sizes and distances, leading to degraded driving force and inefficiencies due to varying distances between coils and magnets, which affect image quality and noise.
Innovation Solution
A camera apparatus design featuring symmetrical and uniformly sized coils and magnets, with consistent gaps and ratios, ensuring efficient driving force by optimizing the alignment and spacing of coils and magnets to improve driving sequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If non-uniform coils and magnets are used to achieve long driving distance, then the driving distance is extended, but the driving force is degraded due to non-uniform distances between coils and magnets
Solution Approach 1:
The coil assembly is divided into multiple coils arranged in series along the optical axis, and the magnet assembly is divided into multiple magnets corresponding to each coil. This segmentation allows each coil-magnet pair to maintain uniform distance and size relationships, preserving driving force while achieving extended driving distance through the cumulative effect of multiple segments.
Solution Approach 2:
Each coil-magnet pair is designed with locally uniform properties (equal sizes, equal distances) to optimize local driving force, while the overall system achieves long driving distance through the sequential arrangement of these locally optimized units. The bilateral symmetrical structure ensures consistent magnetic and electromagnetic interactions at each position.
2Length of moving object
If multiple pairs of coils and magnets are used to extend driving distance, then the driving distance increases, but the device complexity increases
Solution Approach 1:
The patent employs bilateral symmetrical structures for both the coil assembly and magnet assembly, where each half is a mirror image of the other. This symmetry simplifies manufacturing and alignment by reducing the number of unique components and tolerances, thereby managing complexity while achieving extended driving distance through the symmetrical arrangement.
Solution Approach 2:
Multiple coils are electrically connected in series within a single coil assembly, and multiple magnets are mechanically integrated into a unified magnet assembly. This merging approach reduces the number of independent control systems and simplifies the overall structure while maintaining the extended driving distance through the combined effect of multiple coil-magnet interactions.
3Length of moving object
If non-uniform coil and magnet configurations are used, then the driving distance is extended, but power consumption increases due to degraded driving force efficiency
Solution Approach 1:
The multiple coil-magnet pairs are arranged to provide continuous and uniform driving force throughout the entire driving distance. By maintaining equal distances and uniform sizes across all pairs, the system ensures continuous efficient energy conversion from electrical to mechanical energy, preventing energy losses that would occur with non-uniform configurations, thereby reducing overall power consumption while achieving long driving distance.
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 driving force efficiency, reduces power consumption, and maintains image quality by ensuring uniform coil and magnet configurations, thereby improving the overall performance of the camera apparatus.
Implementation Method 1
driving force may be determined by a distance between coils and a size of the coils and magnets
Data Source
AI summary
A camera apparatus including a housing; a first lens barrel and a second lens barrel movable in an optical axis direction; first magnet segment regions disposed on a first side of the first lens barrel and second magnet segment regions disposed on a second side of the second lens barrel; and a plurality of first driving coils disposed on a first side of the housing and a plurality of second driving coils disposed on a second side of the housing. A width of one of the first driving coils or one of the second driving coils along the optical axis direction is greater than or equal to a width of one of the first magnet segment regions or the second magnet segment regions along the optical axis direction.