Quartz Vibrator Weight Structure for Stable Frequency Vibration
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Solution Overview
Problem
Existing vibrator elements face instability and frequency variation due to the inertia of weight sections, particularly when the weight section is thick at the tip portion of the vibrating arm, leading to unsynchronized vibration with the arm section, and gradual widening of the weight section degrades frequency stability.
Innovation Solution
A vibrator element design featuring an intermediate weight section with a larger arm width than the vibrating arm section and a tip weight section with an even larger arm width, along with gradual widening sections between them, to ensure synchronized vibration and frequency stability, and to mitigate asymmetry issues caused by material anisotropy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a weight section with rapidly increasing arm width is formed at the tip portion of the vibrating arm section, then the vibration stability and frequency stability are improved, but the weight section fails to follow the vibration of the vibrating arm section due to inertia, causing vibration instability and frequency variation
Solution Approach 1:
The weight section is divided into multiple segments along the longitudinal direction of the vibrating arm section. Each segment has a different arm width, creating a stepped configuration that reduces the overall mass while maintaining the stabilizing effect on vibration and frequency
Solution Approach 2:
Different portions of the weight section have different arm widths tailored to specific locations. The arm width increases stepwise from the base toward the tip, with each local section optimized to follow the vibration characteristics of that particular region of the vibrating arm section
2Reliability
If a weight section with gradually increasing arm width is formed from the tip portion of the vibrating arm section, then the vibration of the vibrating arm section is stabilized, but the frequency reduction effect is degraded
Solution Approach 1:
The gradual width increase is segmented into discrete steps rather than being continuous. This segmentation allows for optimized mass distribution that maintains vibration stability while preserving the frequency reduction effect through controlled mass addition at specific locations
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 design stabilizes the vibration and frequency of the vibrating arm section, maintains balance between the arm sections, and achieves a frequency reduction effect, resulting in superior oscillation characteristics and high reliability in electronic devices.
Implementation Method 1
there is a case in which the weight section is difficult to follow the vibration (the amplitude) of the vibrating arm section, and if the weight section having a width rapidly increasing to be large (thick) is formed at the tip portion of the vibrating arm section, there arises a problem that the weight section fails to follow the vibration (the amplitude) of the vibrating arm section to thereby vibrate differently from the vibration of the vibrating arm section due to the inertia
Data Source
AI summary
A quartz crystal vibrator element having the weight section is provided with the intermediate weight section formed to have an arm width W1 larger (thicker) than the arm width W of the vibrating arm section and smaller (thinner) than the arm width W2 of the tip weight section, thereby making the intermediate weight section follow the vibration (the amplitude) of the vibrating arm section. Further, the tip weight section formed to have an arm width W2 larger (thicker) than the arm width W1 of the intermediate weight section is provided, thereby making the tip weight section follow the vibration (the amplitude) of the vibrating arm section and the intermediate weight section. Therefore, the vibration characteristics of the vibrating arm section can be stabilized.