Loudspeaker Module With Open Acoustic Cavities For Thin Devices
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Solution Overview
Problem
Conventional loudspeaker modules in thin electronic devices face limitations in size and acoustical performance due to insufficient utilization of internal space, leading to compromised sound radiation and output power.
Innovation Solution
A loudspeaker module design featuring a module housing with open upper and lower ends of acoustic cavities, sealed by sealing cushions, and sound outlet holes on the sidewall, allowing for increased cavity size and unit dimensions, enhancing acoustical performance by fully utilizing internal spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the loudspeaker module is made thin to meet consumer requirements for thin-type portable electronic devices, then the thickness of the loudspeaker module is reduced, but the size of the loudspeaker unit and acoustic cavity are greatly limited, affecting acoustical performance and output power
Solution Approach 1:
The patent changes the dimensional configuration of the acoustic cavity by making the front and rear acoustic cavities communicate with each other through a communication hole in the voice coil assembly. This allows the cavities to extend in the thickness direction while maintaining a compact overall structure, effectively utilizing the limited space within the thin module housing to achieve sufficient acoustic cavity volume without increasing the module's external dimensions.
Solution Approach 2:
The patent implements nesting by placing the front acoustic cavity within the rear acoustic cavity structure. The voice coil assembly acts as a partition that divides the internal space, with the front acoustic cavity positioned in front of the voice coil and the rear acoustic cavity behind it. This nested arrangement allows both cavities to coexist within the limited thickness of the module, maximizing space utilization while maintaining acoustic performance.
2Length of stationary object
If the loudspeaker module is made thin, then the thickness constraint is satisfied, but the space inside the electronic device is not utilized sufficiently, limiting acoustical performance
Solution Approach 1:
The patent makes the loudspeaker module adaptable to different electronic device configurations by designing a universal mounting structure. The module housing can be hermetically combined with either the housing or circuit board of various electronic devices, allowing the same loudspeaker module design to be adapted across different device types and form factors. This multi-functionality enables sufficient space utilization regardless of the specific electronic device application.
3Ease of manufacture
If conventional loudspeaker modules are used with simple locational installation, then manufacturing is simple, but the space inside the electronic device is not utilized sufficiently
Solution Approach 1:
The patent merges the loudspeaker unit with the module housing into an integrated assembly. The voice coil assembly is positioned within the module housing and electrically connected to terminal electrodes on the housing, creating a unified structure. This merging allows the loudspeaker module to be installed as a single component in the electronic device, maintaining ease of manufacture while maximizing space utilization through the integrated design that fully utilizes the available internal space.
Data Source
AI summary
A loudspeaker module comprises a loudspeaker unit and a module housing. A front acoustic cavity and a rear acoustic cavity are formed between the module housing and the loudspeaker unit. The upper and lower ends of the front acoustic cavity and the rear acoustic cavity are open. The upper and lower end surfaces of the module housing are combined with a terminal electronic device through sealing cushions. An electronic device is also disclosed. The upper and lower surfaces of the module housing are combined with the circuit board or the device housing through sealing cushions. Such a structure fully utilizes the spaces of the loudspeaker module and the electronic device, expands the internal space of the loudspeaker module, increases the sizes of the loudspeaker unit and the sound cavities, and accordingly improves the acoustical performance of the product.