Piezoelectric Oscillator Double-Lid Seal Thermal Stability
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Solution Overview
Problem
Existing piezoelectric oscillators face challenges in maintaining stable frequency output due to temperature changes, as hermetically sealed structures can be compromised by warping or deformation of metal components, leading to inadequate heat insulation and sealability.
Innovation Solution
A piezoelectric oscillator design featuring a base member with two lid members, where the first lid member seals the piezoelectric resonator and the second lid member seals the first lid member, both joined to the base member, creating a double-sealed structure that prevents heat dissipation and maintains hermetic sealing even under thermal stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a hermetically sealed structure with metal plates is used to insulate heat, then heat insulation ability is improved, but sealability deteriorates due to warping or deformation of metal members
Solution Approach 1:
The single sealed space is divided into two separate sealed spaces: a first sealed space accommodating the piezoelectric resonator and a second sealed space accommodating the heater. Each space has its own lid member sealed to the base member, preventing deformation-induced sealing failures while maintaining heat insulation effectiveness.
Solution Approach 2:
The first lid member sealing the piezoelectric resonator is nested within the second lid member that seals the heater. This nested configuration allows both sealed spaces to maintain hermetic sealing independently while working together to provide comprehensive heat insulation for the piezoelectric resonator.
2Loss of energy
If the second lid member is joined to the first lid member, then heat insulation is improved, but joint failure occurs due to thermal deformation
Solution Approach 1:
Instead of joining the second lid member to the first lid member, the invention segments the sealing structure by having both lid members independently sealed to the base member. This eliminates the joint between lid members that would be subject to thermal stress and deformation.
Solution Approach 2:
The base member serves as an intermediary structure that both lid members are sealed to independently. This mediator approach avoids direct joining between the first and second lid members, preventing joint failure while maintaining the heat insulation barrier.
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 enhances sealability and heat insulation for the piezoelectric resonator, preventing joint failures and maintaining stable frequency output by ensuring reliable sealing and reduced heat dissipation, even when components deform due to temperature changes.
Implementation Method 1
a piezoelectric resonator mounted on a base member
Implementation Method 2
the output frequency of a piezoelectric resonator is stabilized by performing temperature control to keep the temperature of the piezoelectric resonator at a desirable temperature by using a heater
Implementation Method 3
suppress dissipation of heat from the inside to the outside of the inner space accommodating the piezoelectric resonator
Data Source
AI summary
A piezoelectric oscillator includes a base member on which a piezoelectric resonator is mounted, a first lid member that seals the piezoelectric resonator on the base member, and a second lid member that seals the first lid member on the base member. The first lid member and the second lid member are each joined to the base member.