Buckling Tuning Fork Vibration Device for Camera Lens
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Solution Overview
Problem
Conventional camera systems with raindrop removal functions face challenges in effectively removing water droplets and other substances from the lens cover due to vibration inhibition caused by strengthened joint seals, which compromise the reliability of the camera body and the efficiency of water droplet removal.
Innovation Solution
A vibration device comprising a buckling tuning fork vibrator with a support body that positions the first and second vibration elements at the node of their vibration, allowing them to vibrate with opposite phases, thereby enhancing the sealability and effectiveness of water droplet removal without reducing the amplitude of vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the width of the joint portion between the lens cover and cylindrical tube portion is increased to improve sealability and reliability, then the reliability of the camera body is improved, but the vibration for removing water droplets is inhibited
Solution Approach 1:
The vibration device is divided into two separate vibration elements (first vibration element on lens cover, second vibration element on cylindrical tube portion) that vibrate in opposite phases. This segmentation allows each element to be optimized for its specific function while maintaining overall system performance, resolving the contradiction between sealability and vibration effectiveness.
Solution Approach 2:
The patent employs mechanical vibration through piezoelectric vibrators to achieve water droplet removal. The buckling tuning fork vibrator generates controlled vibrations that effectively remove water droplets without requiring an increased joint portion width, thus maintaining both reliability and productivity.
2Strength
If the width of the joint portion is increased to enhance the strength of the junction, then the reliability of the camera body is improved, but the amplitude of vibration is reduced
Solution Approach 1:
By segmenting the vibration function into two separate elements vibrating in opposite phases, the system maintains high vibration amplitude at the working surfaces while using a narrow joint portion for sealing, thus preserving both junction strength and vibration effectiveness.
Solution Approach 2:
The patent changes the vibration parameters by introducing opposite-phase vibration from two elements, which allows the system to achieve effective water droplet removal with reduced joint portion width, thereby maintaining both strength and vibration amplitude.
3Device complexity
If a single piezoelectric vibrator is used on the cylindrical tube portion, then the structure is simple, but the water droplets and other substances cannot be sufficiently removed
Solution Approach 1:
The vibration function is segmented into two elements positioned at different locations (lens cover and cylindrical tube portion) that vibrate in opposite phases. This segmentation dramatically improves water droplet removal effectiveness compared to a single vibrator, while adding only moderate complexity to the system.
Solution Approach 2:
The patent uses mechanical vibration from two piezoelectric vibrators operating in opposite phases to achieve superior water droplet and substance removal. The opposite-phase vibration creates enhanced mechanical action that is much more effective than a single vibrator, justifying the increased device complexity.
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 improves the reliability of the camera body by effectively removing water droplets and other substances from the lens cover while maintaining the seal integrity, ensuring clear visibility and efficient operation.
Implementation Method 1
a piezoelectric vibrator provided on the second vibration body
Implementation Method 2
the first vibration element and the second vibration element vibrate with mutually opposite phases
Implementation Method 3
the first vibration element, the second vibration element, and the support body define a buckling tuning fork vibrator
Data Source
AI summary
A vibration device includes a support body that includes first and second principal surfaces and a through hole penetrating through the support body to open at the first and second principal surfaces, a first vibration element on the side of the first principal surface of the support body, and a second vibration element on the side of the second principal surface of the support body. The first vibration element includes a first vibration body that is translucent. The second vibration element includes a second vibration body and a second piezoelectric vibrator provided on the second vibration body.