Elastic Damping Member for Optical Apparatus Vibration Control
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Solution Overview
Problem
Actuator-driven optical units in optical apparatuses, such as electromagnetic diaphragm units, cause vibrations and noise due to frictional contact with damper members, which can hinder smooth movement and prevent effective vibration damping.
Innovation Solution
An optical apparatus with an elastic member that contacts the holder and optical unit via specific contacting and connecting portions, providing spaced contacts to absorb vibrations and reduce noise transmission, utilizing damping rubbers with leg-shaped contacting portions and a beam-shaped flexible member to absorb vibrations effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a damper member always contacts the surface of the light-shielding blade with friction, then vibrations are restrained, but the movement of the light-shielding blade becomes rough and not smooth
Solution Approach 1:
The elastic member serves as an intermediary between the holder and the optical unit (light-shielding blade). It contacts both components but remains spaced from them at certain portions, mediating the vibration transmission while allowing smooth relative movement. The elastic material absorbs vibrations through deformation rather than through frictional contact.
Solution Approach 2:
The patent changes the physical state and configuration of the damping component by using an elastic member with specific geometric features (spaced portions) rather than a continuous contact damper. This parameter change allows the member to provide vibration damping through elastic deformation while maintaining smooth movement capability.
2Object-affected harmful factors
If an elastic member contacts both the holder and optical unit continuously, then vibrations are absorbed, but the optical unit's movement is restricted and operation becomes rough
Solution Approach 1:
The elastic member is segmented into different functional portions: contacting portions that attach to the holder and optical unit, and spaced portions that remain detached. This segmentation allows different regions of the same component to perform different functions - attachment and vibration absorption versus movement freedom.
Solution Approach 2:
The elastic member dynamically adapts its contact state with the optical unit during operation. The spaced portions allow the member to flex and move with the optical unit during normal operation, while still providing vibration damping when needed, making the system adaptable rather than rigid.
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 attenuates vibrations and noise, achieving a high damping effect while maintaining smooth operation of the optical unit, as demonstrated by reduced resonance magnification and noise reduction across sensitive frequency ranges.
Implementation Method 1
an elastic member that contacts a holder via a first contacting portion and a second contacting portion, and contacts the optical unit via a connecting portion provided between the first contacting portion and the second contacting portion
Implementation Method 2
The solution effectively attenuates vibrations and noise, achieving a high damping effect while maintaining smooth operation of the optical unit
Data Source
AI summary
An optical apparatus includes an optical unit driven by an actuator, a holder configured to hold the optical unit, and an elastic member that contacts the holder via a first contacting portion and a second contacting portion, and contacts the optical unit via a connecting portion provided between the first contacting portion and the second contacting portion. The elastic member is spaced from the holder between the first contacting portion and the second contacting portion, and spaced from the optical unit between the first contacting portion and the connecting portion and between the connecting portion and the second contacting portion. Part of the elastic member opposite to the connecting portion that contacts the optical unit is spaced from the holder.