Air-Conducting Earphone Loudspeaker With Inverted Diaphragm Layout
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Solution Overview
Problem
Existing air-conducting earphones require larger shell assemblies due to traditional loudspeaker designs, which increase the overall size and affect user experience.
Innovation Solution
The earphone design incorporates an air-conducting loudspeaker with an annular flange and vibration diaphragm arrangement that positions structures away from the sound outlet hole, allowing for a compact shell assembly by optimizing the sound path and reducing the radial dimension near the outlet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional air-conducting loudspeaker structures are used, then sound quality is maintained, but the shell assembly size increases
Solution Approach 1:
The patent inverts the traditional loudspeaker structure by positioning the vibration diaphragm away from the sound outlet hole, with the magnetic circuit assembly located between the vibration diaphragm and the sound outlet hole. This inverted arrangement allows the radial dimension near the sound outlet to be reduced while maintaining the acoustic performance, thereby resolving the contradiction between sound quality and compact size.
Solution Approach 2:
The patent changes the spatial arrangement from the traditional radial configuration to an axial configuration. The vibration diaphragm is positioned at the rear end of the accommodation cavity rather than at the front near the sound outlet, and the magnetic circuit assembly is arranged axially between them. This dimensional reorganization reduces the radial footprint while preserving the acoustic path length, achieving both compact size and high sound quality.
2Speed
If the vibration diaphragm is positioned near the sound outlet hole, then sound transmission is direct, but the radial dimension increases
Solution Approach 1:
Instead of placing the vibration diaphragm near the sound outlet as in traditional designs, the patent inverts this arrangement by positioning it at the rear end away from the outlet. The magnetic circuit assembly is then placed in the space between the diaphragm and outlet, creating a compact axial arrangement that reduces radial dimension while maintaining efficient sound transmission through the optimized acoustic path.
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 minimizing interference between loudspeakers, while maintaining high sound quality.
Implementation Method 1
a voice coil, and a vibration diaphragm, the magnetic circuit assembly including a shield having an open end
Implementation Method 2
the vibration diaphragm covers the open end of the shield, the voice coil being connected to the vibration diaphragm
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.