Piezoelectric Vibrator Support Arm Bonding for Spurious Vibration
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Solution Overview
Problem
Existing piezoelectric vibrator devices cannot effectively suppress unwanted spurious vibration, which occurs near primary vibration, despite efforts to manage support stress.
Innovation Solution
A vibrator device design featuring a rectangular vibrator section with a linkage arm and a support arm, where the adhesive member covers at least 20% of the support arm's area, providing a damping effect to attenuate spurious vibrations, and includes electrically conductive adhesives for secure bonding to a container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a piezoelectric vibrator element with linkage section and support section is used, then the effect of support stress on primary vibration is suppressed, but unwanted spurious vibration cannot be suppressed
Solution Approach 1:
The patent applies local quality by bonding the adhesive member only to a specific region of the support arm (the region shifted from the linkage arm in the second direction), rather than bonding the entire support arm. This localized bonding approach allows the adhesive to suppress spurious vibration in specific areas while maintaining the overall structural integrity and primary vibration characteristics of the vibrator element.
Solution Approach 2:
The adhesive member acts as an intermediary between the support arm and the container. It provides a damping effect that attenuates spurious vibration without directly constraining the vibrator element's primary vibration. The adhesive member mediates between the rigid support arm and the container, absorbing vibrational energy in the spurious frequency range while allowing primary vibration to proceed unaffected.
2Object-generated harmful factors
If adhesive member is bonded to support arm, then spurious vibration is suppressed through damping effect, but stress transmission to vibrator section may occur
Solution Approach 1:
By bonding the adhesive member to a specific region of the support arm (shifted from the linkage arm), the patent creates a localized damping zone that suppresses spurious vibration without creating stress concentration points that could transmit stress to the vibrator section. The selective bonding location optimizes vibration suppression while minimizing stress transmission pathways.
3Object-generated harmful factors
If adhesive area is increased to suppress spurious vibration, then damping effect is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies that the adhesive member should be bonded to a region of the support arm with an area of 20% or more of the total support arm area. This quantitative specification provides clear manufacturing guidelines that balance effective spurious vibration suppression with achievable manufacturing precision. The 20% threshold ensures sufficient damping effect while allowing for reasonable tolerances in adhesive application.
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 significantly reduces spurious vibration by enhancing the damping effect, ensuring stable vibration characteristics while preventing stress transmission and maintaining adhesive strength.
Implementation Method 1
an adhesive member that is shifted from the linkage arm in the second direction, is bonded to the support arm of the vibrator element, and bonds the vibrator element to the container
Implementation Method 2
providing a damping effect to attenuate spurious vibrations
Data Source
AI summary
A vibrator device includes a vibrator element including a vibrator section having a rectangular shape in a plan view, a linkage arm extending from a corner portion of the vibrator section in a first direction, and a support arm extending from the linkage arm in a second direction that intersects with the first direction, a container that houses the vibrator element, and an adhesive member that is shifted from the linkage arm in the second direction, is bonded to the support arm of the vibrator element, and bonds the vibrator element to the container, and an adhesive area of the region where the adhesive member is bonded to the support arm is greater than or equal to 20% of the area of the support arm in the plan view.