Lens Holder Driving Device with Suspension Wire Fracture Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lens holder driving devices for miniature cameras face challenges in stabilizing images without increasing size or complexity, particularly in miniaturizing image stabilizers that can effectively counter camera shake while maintaining impact resistance and preventing suspension wire fractures.
Innovation Solution
A lens holder driving device with an auto-focusing lens holder driving portion and an image stabilizer portion that uses suspension wires to swingably support the lens holder in orthogonal directions, incorporating a fracture preventing member to avoid wire fractures and enhance impact resistance, while optimizing the placement of permanent magnets and coils for improved sensitivity and assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If suspension wires are used to swingably support the lens holder for image stabilization, then image stabilization is achieved, but the suspension wires may fracture under impact
Solution Approach 1:
The patent introduces a buffer member that absorbs impact energy before it reaches the suspension wires. This cushioning element is positioned to receive impacts in the optical axis direction and prevent the transmission of excessive forces that would cause wire fracture, thereby protecting the image stabilization mechanism while maintaining its functionality.
2Volume of moving object
If the image stabilizer is miniaturized for mobile terminals, then device size is reduced, but sensitivity of driving force decreases
Solution Approach 1:
The patent strategically positions the permanent magnet and coil at specific locations within the miniaturized image stabilizer structure. The coil is disposed to face the permanent magnet with optimized spacing, creating a concentrated magnetic field interaction zone that maximizes driving force sensitivity despite the reduced overall size of the image stabilizer.
Solution Approach 2:
The patent optimizes physical parameters such as the spacing between the coil and permanent magnet, the dimensions of these components, and the magnetic field strength to enhance driving force sensitivity. By carefully adjusting these parameters, the system achieves high sensitivity in a miniaturized configuration suitable for mobile terminals.
3Force
If permanent magnets and coils are positioned for optimal sensitivity, then driving force sensitivity improves, but device complexity increases
Solution Approach 1:
The patent integrates the permanent magnet and coil into a unified image stabilizer assembly where these components work together as a single functional unit. This merging of elements simplifies the overall structure by eliminating the need for separate mounting mechanisms and reduces the number of discrete parts, thereby decreasing device complexity while maintaining optimal sensitivity.
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 device effectively stabilizes images without increasing size, enhances impact resistance by preventing wire fractures, and improves sensitivity of the driving force for orthogonal movements, addressing the limitations of previous miniaturization efforts.
Implementation Method 1
a plurality of suspension wires having first end portions fixed to the fixed portion and having second end portions fixed to the auto-focusing lens holder driving portion, and swingably supporting the auto-focusing lens holder driving portion
Implementation Method 2
a fracture preventing member preventing the plurality of suspension wires from fracturing
Implementation Method 3
optimizing the placement of permanent magnets and coils for improved sensitivity and assembly efficiency
Data Source
AI summary
A lens holder driving device includes an auto-focusing lens holder driving portion moving a lens holder holding a lens barrel along an optical axis, and an image stabilizer portion stabilizing image blurred by moving the auto-focusing lens holder driving portion in first and second directions which are orthogonal to the optical axis and which are perpendicular to each other. The image stabilizer portion includes: a fixed portion disposed apart from the auto-focusing lens holder driving portion in the direction of the optical axis; a plurality of suspension wires having first end portions fixed to the fixed portion at outer regions thereof, extending along the optical axis, having second end portions fixed to the auto-focusing lens holder driving portion, and swingably supporting the auto-focusing lens holder driving portion in the first direction and the second direction; and a fracture preventing member preventing the suspension wires from fracturing.