Lens Barrel Diaphragm Isolation for Low-Noise Imaging
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Solution Overview
Problem
Existing lens barrels face challenges in reducing noise generated by the vibration of diaphragm blades due to direct transmission between the diaphragm device and the fixed barrel, which is exacerbated by the use of rubber buffer members that deform and lose positioning accuracy.
Innovation Solution
Employing engineering plastic or super engineering plastic buffer members to position the diaphragm device relative to the fixed barrel, ensuring minimal contact and using slits to absorb vibrations, thereby preventing direct vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If rubber buffer members are used to position the diaphragm device, then vibration transmission is reduced, but positioning accuracy deteriorates due to deformation
Solution Approach 1:
The patent changes the material parameter of the buffer member from rubber to engineering plastic or super engineering plastic. This material substitution maintains the vibration absorption function while eliminating the deformation issue, thereby preserving positioning accuracy. The engineering plastics provide sufficient rigidity to maintain dimensional stability under operational conditions.
Solution Approach 2:
The patent employs engineering plastic or super engineering plastic materials that combine the necessary vibration damping properties with high rigidity and dimensional stability. These materials represent a composite approach to achieving both vibration reduction and positioning accuracy by selecting materials with optimized physical properties.
2Device complexity
If the diaphragm device is directly attached to the fixed barrel, then positioning is simplified, but noise increases due to direct vibration transmission
Solution Approach 1:
The patent introduces an intermediary component - the buffer member made of engineering plastic or super engineering plastic - between the diaphragm device and the fixed barrel. This intermediary maintains a non-contact relationship while providing vibration isolation, thereby reducing noise without requiring complex attachment structures.
3Object-affected harmful factors
If rubber buffer members are used, then vibration absorption is achieved, but positioning stability deteriorates due to deformation
Solution Approach 1:
The patent changes the material parameters by selecting engineering plastic or super engineering plastic over rubber. These materials possess higher rigidity and lower deformation characteristics, ensuring that the buffer member maintains its shape and positioning stability even under the mechanical stresses of operation, while still providing adequate vibration absorption.
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 solution effectively reduces noise in the lens barrel by maintaining precise positioning and absorbing vibrations, ensuring the diaphragm device and fixed barrel remain non-contact and minimizing vibration transmission.
Implementation Method 1
a plurality of buffer members 40 disposed between the opening member 31 and the plurality of facing portions 223, respectively, wherein the plurality of buffer members 40 position the opening member 31 with respect to the fixed barrel 22
Data Source
AI summary
In order to reduce the noise of a lens barrel, the lens barrel includes a plurality of diaphragm blades, a driver driving the plurality of diaphragm blades, a first opening member that holds the driver, a second opening member including a plurality of facing portions opposed to the first opening member in an optical axis direction, and a plurality of buffer members disposed between the first opening member and the plurality of facing portions, respectively, wherein the plurality of buffer members position the first opening member with respect to the second opening member.