Ear Cup Structure with Guide Channel for Balanced Air Discharge
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Solution Overview
Problem
Conventional ear cup structures for earphones often have differences in air discharge amounts between left and right ear cups due to varying numbers of opening holes, leading to disparities in resonance frequency and ventilation, resulting in unequal sound quality and sound curves.
Innovation Solution
An ear cup structure featuring a guide channel and discharge hole between the ear cup shell and cover, which balances air pressure by directing airflow from the rear chamber to the external environment, and adjustable acoustic resistance through varying guide channel lengths to equalize sound characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional ear cup shells have different numbers of opening holes for buttons or terminals, then design flexibility is improved, but air discharge amount difference between left and right ear cups increases
Solution Approach 1:
The patent introduces a ventilation hole as an intermediary component between the ear cup shell and the external environment. This ventilation hole is specifically designed to compensate for the air discharge amount differences caused by varying numbers of opening holes in different ear cup shells, thereby maintaining air discharge consistency between left and right ear cups while preserving design flexibility for buttons and terminals.
2Adaptability or versatility
If opening holes are added to ear cup shells for buttons or terminals, then functionality is improved, but resonance frequency and ventilation characteristics become inconsistent between ear cups
Solution Approach 1:
The patent employs parameter changes by adjusting the ventilation hole's dimensions, position, or shape to compensate for the effects of opening holes. By modifying the ventilation hole parameters, the system maintains consistent resonance frequency and ventilation characteristics between left and right ear cups, ensuring sound quality consistency while allowing functional additions like buttons and terminals.
3Ease of operation
If ear cup shells have asymmetric opening hole configurations, then ease of operation is improved, but sound curve differences between channels increase
Solution Approach 1:
The ventilation hole serves as a compensatory intermediary that balances the acoustic impact of asymmetric opening hole configurations. By strategically positioning and dimensioning the ventilation hole, the system maintains consistent sound curves between left and right channels while preserving ease of operation for buttons and terminals on the ear cup shells.
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 solution effectively balances air discharge between ear cups, improving sound quality and frequency consistency by adjusting acoustic resistance, thereby addressing the disparities in sound output between left and right ear cups.
Implementation Method 1
an airflow produced by the speaker in the rear chamber flows through the guide channel and is discharged to an external environment from the discharge hole
Implementation Method 2
an airflow produced by the speaker in the rear chamber
Data Source
AI summary
An ear cup structure including an ear cup shell, a cover, a discharge hole, a speaker, and a guide channel is provided. The ear cup shell has at least a first accommodating space and a second accommodating space spaced from each other, and the second accommodating space has a second opening. The cover covers the second opening of the second accommodating space. The discharge hole is formed between the ear cup shell and the cover. The speaker is disposed in the second accommodating space, thereby dividing the second accommodating space into a front chamber and a rear chamber. The guide channel is communicated with a peripheral side of the rear chamber and is disposed between the rear chamber and the discharge hole. An airflow produced by the speaker in the rear chamber flows through the guide channel and is discharged to an external environment from the discharge hole.