Speaker Stacked Cavities Area Reduction
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Solution Overview
Problem
Conventional mobile phone speakers occupy a large area due to the side-by-side arrangement of front and rear cavities, limiting space utilization and audio quality due to resonance issues and inadequate heat dissipation.
Innovation Solution
The speaker design stacks the front and rear cavities along the thickness direction of the kernel, with a thermally conductive spacer and sound-absorbing particles, and uses a breathable film to balance air pressure and prevent water ingress, enhancing heat dissipation and sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the front cavity and rear cavity are arranged side by side, then the speaker structure is simple, but the area occupied by the speaker is large
Solution Approach 1:
The patent transitions from a planar side-by-side arrangement of front and rear cavities to a three-dimensional stacked configuration. The front cavity is positioned above the rear cavity in the thickness direction, utilizing vertical space rather than horizontal space. This dimensional change reduces the speaker's footprint area while maintaining the necessary cavity volumes for acoustic performance.
2Reliability
If the rear cavity has a specific volume to meet performance indicators, then the audio quality is improved, but the area occupied by the speaker increases
Solution Approach 1:
The patent achieves the required rear cavity volume for audio quality by extending the cavity in the thickness direction rather than expanding it in the planar area. The rear cavity is formed between the lower cover and the kernel, utilizing the vertical space available in the speaker assembly, thereby maintaining small footprint area while ensuring sufficient cavity volume for acoustic performance.
3Ease of manufacture
If the front cavity and rear cavity are arranged side by side, then the manufacturing is easy, but the heat dissipation is inadequate
Solution Approach 1:
The stacked arrangement of front and rear cavities in the thickness direction creates improved thermal management characteristics. The vertical separation and the breathability membrane between cavities facilitate heat dissipation pathways, allowing heat generated by the kernel to escape more effectively than in a compact side-by-side configuration where heat would be trapped in a confined planar space.
4Device complexity
If the side-by-side arrangement is used, then the device assembly is simple, but the resonance issues increase
Solution Approach 1:
The patent positions the front and rear cavities at different vertical levels in the thickness direction, with the breathability membrane separating them. This spatial separation in the vertical dimension reduces acoustic coupling between the cavities, thereby minimizing resonance and vibration issues that would occur in a side-by-side arrangement where the cavities are in closer proximity and more prone to interacting acoustically.
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 design reduces the speaker's area occupancy, improves space utilization, and enhances sound quality and heat dissipation, minimizing resonance-induced noise and power consumption.
Implementation Method 1
a breathability film is disposed on the first through hole, to allow air to be in communication between the front cavity and the rear cavity, and prevent water from entering the rear cavity
Implementation Method 2
a thermally conductive spacer is disposed in the housing, the kernel and the spacer are stacked in a thickness direction of the kernel
Implementation Method 3
with a thermally conductive spacer and sound-absorbing particles
Data Source
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AI summary
This application provides a speaker and a mobile terminal. The speaker includes a housing and a kernel located in the housing, where there is a front cavity and a rear cavity in the housing, the front cavity is in communication with the outside, and the rear cavity is an isolated cavity. In addition, to reduce a space area occupied by the entire speaker, the front cavity and the rear cavity are disposed in a stacked manner when being disposed. Specifically, the front cavity and the rear cavity are at least partially stacked along a thickness direction of the kernel. Therefore, the rear cavity is disposed in space of the entire speaker in the thickness direction of the kernel, to reduce an area occupied by the entire speaker in the mobile terminal on the premise that a size of the rear cavity meets a requirement.