Lens Driving Device Elastic Segmentation for Overweight Lenses
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Solution Overview
Problem
Conventional lens driving devices lack sufficient driving force to handle overweight lenses, leading to compromised elastic coefficient and position accuracy due to the need for thickened elastic arms and increased space occupation.
Innovation Solution
A lens driving device featuring a housing, spacer, lens supporting body, coil, magnet, and at least three elastic pieces that connect the base and spacer with the lens supporting body, enhancing posture and position accuracy while enabling the driving of overweight lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the elastic arms are thickened to ensure linear movement of the lens, then the driving force is improved, but the elastic coefficient is affected and the length must be increased which occupies space
Solution Approach 1:
The single elastic member is segmented into multiple elastic pieces (at least three) that are distributed around the lens supporting body. This segmentation allows the elastic force to be distributed across multiple smaller components rather than requiring one thick elastic arm, thereby reducing space occupation while maintaining sufficient driving force.
Solution Approach 2:
Multiple elastic pieces are combined to work together as a unified support system. The cumulative effect of multiple thin elastic pieces provides the necessary driving force equivalent to or greater than a single thick elastic arm, while occupying less total space and maintaining better elastic coefficients.
2Force
If the elastic arms are thickened to ensure linear movement of the lens, then the driving force is improved, but the position accuracy of the lens support is deteriorated
Solution Approach 1:
By dividing the support structure into multiple thin elastic pieces rather than one thick arm, the system achieves better position accuracy. Each thin elastic piece can deform more precisely and predictably, allowing for more accurate lens positioning while collectively providing sufficient driving force.
Solution Approach 2:
The elastic pieces are strategically positioned at specific locations around the lens supporting body to optimize both force generation and position accuracy. This localized arrangement allows different regions to serve different functions - some areas provide primary driving force while others maintain positional precision.
3Reliability
If the length of elastic arms is increased to ensure certain range of elastic coefficient, then the elastic coefficient is improved, but the space occupation is increased
Solution Approach 1:
Multiple shorter elastic pieces are combined to achieve the cumulative elastic effect that would otherwise require a single long elastic arm. The combined elastic coefficients of multiple pieces provide the necessary reliability and elastic coefficient range while occupying significantly less space than one extended arm.
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 achieves improved posture and position accuracy for the lens supporting body, allowing it to effectively drive overweight lenses with enhanced driving force without compromising space or accuracy.
Implementation Method 1
a coil, a magnet
Implementation Method 2
at least three elastic pieces are respectively disposed on the base and the spacer and connect the base and the spacer with the lens supporting body
Data Source
AI summary
A lens driving device is described that includes a housing, a spacer, a lens supporting body, a coil, a magnet, and a base. The lens supporting body is disposed on the base, the spacer is disposed within the housing, and the housing covers the spacer, the lens supporting body, the coil and the magnet, and is connected to the base. The lens driving device further includes at least three elastic pieces. The at least three elastic pieces are respectively disposed on the base and the spacer and are connected to the base and the lens supporting body.