Optical Focus Lens Holding Mechanism With Two-Direction Biasing
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Solution Overview
Problem
Existing optical apparatuses, such as digital and video cameras, face challenges in improving portability while maintaining lens holding accuracy and image quality due to limitations in biasing the focus lens holding frame in both parallel and orthogonal directions to the optical axis.
Innovation Solution
An optical apparatus with a holding member, drive unit, intermediate members, and biasing members that stabilize the focus lens position and orientation, ensuring accurate movement and reduced overall length through a retractable structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the focus lens holding frame is biased only in a direction parallel to the optical axis, then the overall length can be reduced in retracted state, but the lens holding accuracy deteriorates due to inability to bias in planar direction orthogonal to optical axis
Solution Approach 1:
The patent introduces biasing in a second direction orthogonal to the first direction (parallel to optical axis), transitioning from one-dimensional to two-dimensional biasing control. This allows simultaneous control of the holding frame in both axial and radial directions, resolving the contradiction between length reduction and holding accuracy.
Solution Approach 2:
The patent introduces an intermediate member (rack holder) that mediates between the drive unit and the holding frame. This intermediate member receives drive force and transmits it while maintaining stable positioning, enabling accurate lens holding without increasing overall length.
2Length of moving object
If the moving range of the holding frame is narrowed to reduce overall length, then portability is improved, but the lens holding accuracy and image quality may deteriorate
Solution Approach 1:
The patent employs dynamic biasing control where the biasing force is actively managed through the drive unit and intermediate member system. This allows the holding frame to maintain stable positioning within a narrowed moving range, ensuring image quality is not compromised despite reduced overall length.
Solution Approach 2:
The intermediate member acts as a mediator that ensures stable force transmission and positioning within the constrained moving range. This mediation allows the system to achieve reliable lens holding accuracy even with limited movement space, maintaining image quality while improving portability.
3Length of moving object
If a retractable structure is used to reduce overall length, then portability is enhanced, but the complexity of the drive mechanism increases
Solution Approach 1:
The patent segments the drive mechanism into distinct functional components: a drive unit and an intermediate member (rack holder). This segmentation allows each component to perform its specific function efficiently, managing the complexity of the retractable structure through modular design.
Solution Approach 2:
The intermediate member serves as a mediator that simplifies the overall drive mechanism by providing a clear interface between the drive unit and the holding frame. This mediation reduces complexity by establishing a straightforward force transmission path in the retractable structure.
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 portability and maintains high lens holding accuracy and image quality by stabilizing the focus lens position and orientation, even under varying conditions, reducing the risk of impact-induced damage and improving responsiveness.
Implementation Method 1
a first biasing member configured to bias the first intermediate member toward the drive unit and bias the second intermediate member toward the holding member
Data Source
AI summary
An optical apparatus includes a holding member configured to hold an optical system, a drive unit configured to move the holding member, an intermediate member including a first intermediate member in contact with the drive unit, and a second intermediate member in contact with the first intermediate member and the holding member, the intermediate member being configured to transmit a drive force of the drive unit to the holding member, and a first biasing member configured to bias the first intermediate member toward the drive unit and bias the second intermediate member toward the holding member.