Lens Driving Device Middle Portion Elastic Support
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Solution Overview
Problem
Conventional lens driving devices face challenges in prolonging the driving stroke of the movable portion without increasing stress on components, which can lead to deformation or damage.
Innovation Solution
The lens driving device incorporates a middle portion between the fixed and movable portions, supported by first and second elastic support members, allowing for extended driving strokes while distributing stress effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the driving stroke of the movable portion is increased, then the range of motion is improved, but the stress on components increases leading to deformation or damage
Solution Approach 1:
The support structure is divided into three segments: a fixed portion, a movable portion, and a middle portion connecting them. This segmentation allows the driving stroke to be extended by moving the middle portion, while each segment bears controlled stress, preventing component deformation or damage.
2Adaptability or versatility
If the driving stroke is prolonged, then the operational range is improved, but the risk of component deformation or damage increases
Solution Approach 1:
The middle portion is designed to be movable relative to both the fixed and movable portions, allowing dynamic adjustment during operation. This dynamic structure enables prolonged driving strokes while distributing stress dynamically across multiple components, maintaining reliability.
3Device complexity
If a single support member is used, then the device complexity is reduced, but the driving stroke cannot be prolonged without increasing stress
Solution Approach 1:
A middle portion is introduced as an intermediary element between the fixed and movable portions. This intermediate structure enables extended driving strokes by providing an additional degree of freedom, while the increased complexity is localized only to this middle section rather than the entire device.
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 configuration enables longer drive strokes without increasing stress on components, reducing the likelihood of deformation or breakage, and maintaining mechanical strength.
Implementation Method 1
a first elastic support member movably supporting a front portion of the middle portion in a direction orthogonal to an optical axis of the lens body with respect to the fixed portion
Implementation Method 2
a second elastic support member movably supporting the movable portion in a direction orthogonal to the optical axis of the lens body with respect to a rear portion of the middle portion
Data Source
AI summary
A lens driving device includes: a fixed portion; a movable portion including a lens carrier that holds a lens body; a middle portion provided between the fixed portion and the movable portion; a first elastic support member movably supporting a front portion of the middle portion with respect to the fixed portion in a direction orthogonal to an optical axis of the lens body; and a second elastic support member movably supporting the movable portion with respect to a rear portion of the middle portion in a direction orthogonal to the optical axis of the lens body.