Air-Conducting Earphone Loudspeaker Layout for Compact Shells
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Solution Overview
Problem
Existing air-conducting earphones require larger shell assemblies due to their sound path design, which increases overall size and affects user experience.
Innovation Solution
The earphone design includes an air-conducting loudspeaker with a magnetic circuit assembly and vibration diaphragm, where the annular flange and vibration diaphragm are positioned away from the sound outlet hole, allowing for a compact shell assembly by arranging larger structures away from the sound outlet and smaller structures closer to it, optimizing the sound path and reducing the shell's dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the air-conducting loudspeaker uses a traditional structure with the vibration diaphragm facing the sound outlet hole, then the sound transmission path is optimized, but the shell assembly size increases significantly
Solution Approach 1:
The patent inverts the traditional loudspeaker structure by positioning the vibration diaphragm away from the sound outlet hole and placing the annular flange at the open end of the shield protruding from the outer periphery. This inversion allows the sound transmission path to be optimized while significantly reducing the shell assembly size, directly resolving the technical contradiction between sound quality and compactness.
Solution Approach 2:
The patent changes the spatial arrangement from a traditional one-dimensional alignment (diaphragm facing outlet) to a three-dimensional configuration where the diaphragm is positioned on the shield back side and the flange extends outward. This dimensional reorganization enables compact shell design while maintaining acoustic performance.
2Reliability
If the shell assembly is enlarged to accommodate the air-conducting loudspeaker, then the sound path can be optimized, but the overall earphone size increases affecting user experience
Solution Approach 1:
By inverting the loudspeaker structure so the vibration diaphragm faces away from the sound outlet hole, the patent enables sound path optimization within a compact shell assembly, thereby improving user experience without sacrificing acoustic performance.
3Reliability
If the vibration diaphragm is positioned closer to the sound outlet hole, then sound transmission is improved, but the magnetic circuit assembly requires more space
Solution Approach 1:
The patent positions the vibration diaphragm on the shield back side away from the sound outlet hole, and places the annular flange at the open end of the shield. This inverted arrangement allows the magnetic circuit assembly to be compact while maintaining efficient sound transmission through the diaphragm's vibration.
Solution Approach 2:
The vibration diaphragm covers the open end of the shield and is fixed to the annular flange, creating a nested configuration where the diaphragm integrates with the magnetic circuit assembly structure, reducing overall space requirements while maintaining transmission efficiency.
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 configuration results in a more compact shell assembly, improved spatial utilization, and enhanced sound quality by reducing the shell's volume and optimizing the sound path.
Implementation Method 1
the voice coil being connected to the vibration diaphragm
Implementation Method 2
the vibration diaphragm covering the open end of the shield
Data Source
AI summary
The present disclosure relates to an earphone (100), comprising a shell assembly (10) and an air-conducting loudspeaker (12). The shell assembly (10) is provided with an accommodation cavity (1001 and 1002) and a sound outlet hole (1080) for connecting the accommodation cavity (1001 and 1002) to an external environment. The air-conducting loudspeaker (12) includes a magnetic circuit assembly (120), a voice coil (122), and a vibration diaphragm (123). The magnetic circuit assembly (120) includes a shield (121) having an open end (1211), and an annular flange (1212) that is disposed at the open end (1211) of the shield (121) and protrudes from an outer periphery surface of the shield (121). A rim of the vibration diaphragm (123) is fixed to the annular flange (1212) and the vibration diaphragm (123) covers the open end (1211) of the shield (12). The voice coil (122) is connected to the vibration diaphragm (123), and the vibration diaphragm (123) is disposed on a side of the shield (121) away from the sound outlet hole (1080). Through the above design, the present disclosure can effectively improve the spatial utilization of the shell assembly (10), reduce the overall volume of the entire shell assembly (10), and also effectively enhance the sound quality.