Speaker Module Rear Sound Exit and Chamfered Sidewall Design
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Solution Overview
Problem
Current loudspeaker modules are too large to fit in lightweight, thinner, and compact portable electronic terminals without compromising acoustic performance.
Innovation Solution
A loudspeaker module design that eliminates the rear acoustic cavity by using rear sound exit holes on the outer casing to communicate with the electronic terminal's internal space, combined with chamfered planes on the sidewalls to enhance air circulation and a frame structure to reduce volume, while maintaining acoustic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rear acoustic cavity is provided in the loudspeaker module to boost low-frequency performance and prevent acoustic short-circuiting, then acoustic performance is improved, but the volume of the loudspeaker module increases
Solution Approach 1:
The patent extracts the rear acoustic cavity from the internal structure of the loudspeaker module and relocates it to the external space of the electronic terminal. The rear sound exit hole communicates with the terminal's internal space, which serves as the rear acoustic cavity, thereby eliminating the need for internal cavity volume while maintaining acoustic performance.
Solution Approach 2:
The invention transitions the rear acoustic cavity from a three-dimensional internal volume to a two-dimensional surface opening (rear sound exit hole) that accesses external space. This dimensional change allows the module to utilize the terminal's internal space rather than requiring dedicated internal volume.
2Adaptability or versatility
If the volume of the loudspeaker module is reduced to fit in compact electronic terminals, then adaptability to portable devices is improved, but acoustic performance may be compromised
Solution Approach 1:
The patent makes the electronic terminal's internal space serve multiple functions: it acts as the rear acoustic cavity for low-frequency enhancement, provides acoustic isolation to prevent short-circuiting, and offers heat dissipation space. This multi-functionality allows the loudspeaker module to achieve acoustic performance without increasing its own volume.
Data Source
Figure 1
Figure 2~4
AI summary
The present disclosure discloses a loudspeaker module and relates to the technical field of electroacoustic products. The loudspeaker module is installed in an interior of an electronic terminal and comprises an outer casing in which a vibration system and a magnetic circuit system are received, the magnetic circuit system comprises a basin-like stand fixed on the outer casing, a magnet and a washer are fixed in turn in the basin-like stand, a position of the outer casing corresponding to a sidewall of the basin-like stand is provided with a rear sound exit hole, the rear sound exit hole is communicated with an inner cavity of the module and an inner cavity of the electronic terminal; a chamfered plane is disposed at an upper end of a sidewall of the basin-like stand corresponding to the rear sound exit hole, and the chamfered plane is disposed on a side of the sidewall of the basin-like stand adjacent to the rear sound exit hole. The loudspeaker module according to the present disclosure solves technical problems in the prior art such as large volume and likely low-frequency distortion of the loudspeaker module. The loudspeaker module of the present disclosure minimizes the volume while ensuring the acoustic performance of the loudspeaker modules, meets the needs of light weighted, thinner and slimmer electronic terminals, and exhibits high stability and long service life.