Electronic Thermometer Buzzer Fixing Mechanism
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Solution Overview
Problem
Conventional electronic thermometers face challenges in achieving accurate fixation of the buzzer's vibration plate, leading to insufficient resonance and sound volume due to dimensional and assembly accuracy issues, which increase manufacturing costs.
Innovation Solution
The electronic thermometer employs a pressing member with plasticity that flexes to press the vibration plate against a supporting portion, absorbing dimensional errors and ensuring accurate fixation, even with reduced accuracy, using a mechanism that presses the periphery of the vibration plate with an elastic reaction force, enhancing resonance and sound volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional rigid buzzer fixing structure is used, then the structure is simple and easy to manufacture, but the vibration plate cannot be fixed accurately at the desired position due to dimensional and assembly accuracy issues
Solution Approach 1:
The pressing member is changed from a rigid structure to a flexible structure with elastic properties. This parameter change allows the pressing member to deform elastically during assembly, automatically compensating for dimensional variations and ensuring accurate positioning of the vibration plate without requiring high-precision manufacturing of the entire fixing structure.
Solution Approach 2:
The elastic pressing member provides beforehand cushioning by absorbing dimensional errors and assembly variations through its elastic deformation. This cushioning effect occurs during the assembly process itself, ensuring that the vibration plate is always pressed accurately against the supporting portion regardless of manufacturing tolerances of other components.
2Manufacturing precision
If high dimensional accuracy and assembly accuracy are required for the buzzer fixing structure, then the vibration plate can be fixed accurately, but the manufacturing cost increases
Solution Approach 1:
By changing the parameter of the pressing member from rigid to flexible with elastic properties, the system can tolerate larger dimensional variations in other components. This reduces the required dimensional accuracy and assembly accuracy of the overall structure, thereby lowering manufacturing costs while maintaining accurate vibration plate positioning.
Solution Approach 2:
The pressing member is designed as a flexible component that can elastically deform to accommodate dimensional variations. This flexible structure replaces the need for high-precision rigid components and tight assembly tolerances, making the overall device easier and cheaper to manufacture while achieving the required positioning accuracy.
3Ease of manufacture
If the vibration plate is not fixed accurately at the desired position, then the manufacturing cost is reduced, but the resonance action and sympathetic vibration action become insufficient
Solution Approach 1:
The elastic pressing member maintains the critical parameter of vibration plate positioning accuracy while allowing other dimensions to vary within broader tolerances. This ensures that the resonance and sympathetic vibration actions remain effective without requiring high-precision manufacturing of all components, thus maintaining reliability while reducing manufacturing cost.
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 solution allows for accurate fixation of the buzzer's vibration plate, resulting in a larger sound volume even with reduced dimensional and assembly accuracy, thereby reducing manufacturing costs and maintaining effective resonance and sympathetic vibration actions.
Implementation Method 1
a mechanism which presses the vicinity of the center of the pressing member on an opposite side to a side provided with the vibration plate in the pressing member so as to flex the pressing member, thereby pressing the vicinity of the periphery on the other face of the vibration plate with elastic reaction force of the pressing member
Implementation Method 2
resonant space R is formed in a region surrounded by the buzzer 280 and the inner case 220. Then, when the resonant space R resonates with vibration sound of the vibration plate of the buzzer 280 so that the inner case 220 vibrates sympathetically with vibration of the vibration plate 220
Data Source
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AI summary
The electronic thermometer of this invention includes a supporting portion which supports the vicinity of the periphery on one face of a vibration plate, and a buzzer cover having plasticity of pressing the vibration plate against the supporting portion by pressing the vicinity of the periphery of the other face of the vibration plate and further includes a mechanism which presses the vicinity of the center of the buzzer cover on an opposite side to a side provided with the vibration plate in the buzzer cover so as to flex the buzzer cover, thereby pressing the vicinity of the periphery on the other face of the vibration plate with elastic reaction force of the buzzer cover.