Lens Barrel Folded-Substrate Structure for Shake Isolation
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Solution Overview
Problem
Conventional lens barrels face issues with low space efficiency and direct transmission of shake to the shake detector, which affects image stabilizing performance.
Innovation Solution
A lens barrel design that includes a first substrate positioned by multiple elastic members orthogonal to the optical axis, a second elastic member between the substrate and the barrel, and a folded portion in the flexible printed circuit board to suppress shake transmission, allowing for high space efficiency and stable substrate holding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If at least three elastic members are used to hold the substrate, then the substrate can be positioned and held, but three holes or notches are needed which reduces space efficiency and prevents mounting electrical components
Solution Approach 1:
The patent merges the substrate holding function and electrical connection function into a single integrated structure. The elastic member simultaneously holds the substrate and serves as an electrical connection path, eliminating the need for separate holes or notches and allowing space for mounting electrical components.
Solution Approach 2:
The elastic member is designed to perform multiple functions: it positions and holds the substrate while also serving as an electrical connection path. This multi-functional design eliminates the need for separate structural and electrical elements, improving space efficiency.
2Volume of moving object
If the substrate is positioned near the mount, then the structure is compact, but shake is directly transmitted to the substrate via the mount which deteriorates image stabilizing performance
Solution Approach 1:
The elastic member acts as an intermediary between the mount and the substrate. It transmits necessary forces while absorbing and isolating shake vibrations, preventing direct transmission of harmful vibrations to the substrate and improving image stabilizing performance.
Solution Approach 2:
The elastic member provides beforehand cushioning by absorbing vibrations and shocks before they can reach the substrate. This preemptive vibration isolation protects the substrate from harmful vibrations while maintaining the compact structure.
3Reliability
If holes or notches are provided in the substrate for elastic members, then the substrate can be held, but electrical wires or electrical components cannot be mounted around these features
Solution Approach 1:
The elastic member integrates both mechanical holding and electrical connection functions. By eliminating separate holes or notches, the substrate surface remains intact and available for mounting electrical components, while the elastic member itself provides the electrical connection path.
Solution Approach 2:
The patent extracts the electrical connection function from separate wires or traces and incorporates it directly into the elastic member structure. This eliminates the need for holes or notches and frees up substrate space for electrical component mounting.
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 design achieves high space efficiency and effectively suppresses shake transmission to the shake detector, enhancing image stabilization performance.
Implementation Method 1
a plurality of first elastic members held by the fixed barrel and configured to position and hold the first substrate in a direction orthogonal to an optical axis
Implementation Method 2
a second elastic member held by the fixed barrel and disposed between the fixed barrel and the first substrate
Implementation Method 3
The first substrate is urged toward the fixed barrel in the optical axis direction by a force from the folded portion
Data Source
AI summary
A lens barrel includes an electric contact fixed to a mount, a first substrate disposed between a fixed barrel and the mount, a second substrate connected to the first substrate and the electric contact while forming a folded portion, and disposed so as to overlap the first substrate when viewed from an optical axis direction, a plurality of first elastic members held by the fixed barrel and configured to position and hold the first substrate in a direction orthogonal to an optical axis, and a second elastic member held by the fixed barrel and disposed between the fixed barrel and the first substrate. The first substrate is urged toward the fixed barrel in the optical axis direction by a force from the folded portion, and contacts the second elastic member on a surface on a side of the fixed barrel of the first substrate.