Quartz Crystal Pedestal Fixation Layout for Frequency Stability
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Solution Overview
Problem
Existing quartz crystal devices face challenges in achieving improved frequency stability, vibration resistance, and impact resistance due to inadequate fixation of the pedestal with respect to the container, as the specific arrangement of fixation points is not clearly defined in previous solutions.
Innovation Solution
The quartz crystal device incorporates a pedestal configured with a crystal, fixed to the container at three specific positions - the inner center, outer center, or gravity center of a triangle formed by these points, ensuring optimal alignment and reducing stress on the quartz-crystal vibrating piece.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pedestal is fixed to the container at three places, then the stress on the quartz-crystal vibrating piece is reduced, but the fixation position arrangement is not clearly defined leading to inadequate performance
Solution Approach 1:
The fixation structure is segmented into three specific fixation points arranged in a triangular pattern on the pedestal. This segmentation allows each fixation point to be optimally positioned to minimize stress on the quartz-crystal vibrating piece while maintaining manufacturing simplicity through the regular triangular geometry.
Solution Approach 2:
The pedestal design preliminarily determines the optimal fixation positions by arranging three fixation points in a triangular pattern before actual assembly. This preliminary arrangement ensures that stress is evenly distributed and minimized on the quartz-crystal vibrating piece, achieving frequency stability without requiring complex post-assembly adjustments.
2Reliability
If the pedestal and container are made of identical material, then stress reduction is achieved, but heat conduction and temperature compensation requirements become more critical
Solution Approach 1:
The pedestal is designed with specific local properties: it is configured with a crystal structure and has three fixation points arranged in a triangular pattern. This local quality optimization allows the pedestal to provide both mechanical support for vibration resistance and thermal management pathways for temperature compensation, resolving the contradiction between material uniformity and thermal performance.
Solution Approach 2:
The pedestal acts as an intermediary component between the quartz-crystal vibrating piece and the container. By positioning the three fixation points in a triangular arrangement on the pedestal, it mediates both mechanical stress reduction and thermal conduction, enabling the system to achieve vibration resistance while facilitating temperature compensation through its structured configuration.
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 arrangement enhances the device's stability and resistance to vibrations and impacts by minimizing stress on the quartz-crystal vibrating piece, while also facilitating effective heat conduction and temperature compensation, leading to improved performance in frequency control and oscillator applications.
Implementation Method 1
The pedestal is located between the quartz-crystal vibrating piece and the container for connecting and fixing the quartz-crystal vibrating piece to the container
Data Source
AI summary
A quartz crystal device includes a quartz-crystal vibrating piece, a container, and a pedestal. The container houses the quartz-crystal vibrating piece. The pedestal is located between the quartz-crystal vibrating piece and the container for connecting and fixing the quartz-crystal vibrating piece to the container. The pedestal is configured with a crystal. The pedestal is fixed to the container at three places of a first fixation point, a second fixation point, and a third fixation point in a plan view. The first fixation point, the second fixation point, and the third fixation point are configured so as to become positions where an inner center, an outer center, or a gravity center of a triangle formed by connection of the first, second and third fixation points and a gravity center of the pedestal match.