Speaker Box Covering Shell Rear Cavity Design
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Solution Overview
Problem
Existing speaker boxes have a complex and unstable support and mesh structure, limiting the area for sound-absorbing particles and complicating the fixing method, which affects the acoustic performance and stability of the device.
Innovation Solution
A speaker box design featuring a housing with a sound hole, a vibration system, and a magnetic circuit system, where the covering shell divides the rear cavity into two sections, with sound-absorbing particles in the outer section, and a recessing portion on the side wall that communicates between the two cavities, allowing for improved acoustic performance and a simpler, more stable structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a support and mesh assembly are provided to fix the sound-generating unit, then the structure becomes stable, but the fixing method becomes complicated and the filling area for sound-absorbing particles is limited
Solution Approach 1:
The invention extracts the support function from a separate support component and integrates it into the covering shell itself. The covering shell directly supports the sound-generating unit through its structural design, eliminating the need for a separate support assembly and mesh, thereby simplifying the fixing method while maintaining structural stability
Solution Approach 2:
The invention merges the support function and the enclosing function into a single covering shell component. The covering shell both supports the sound-generating unit and encloses the rear cavity, combining multiple functions into one element to reduce overall device complexity
2Stability of the object's composition
If a support and mesh assembly are provided to fix the sound-generating unit, then the structure becomes stable, but the filling area for sound-absorbing particles is limited
Solution Approach 1:
By removing the support assembly and mesh from the design, the invention extracts the obstacles that were limiting the filling area. This allows the rear cavity to be fully available for filling with sound-absorbing particles, maximizing the quantity of sound-absorbing material that can be used
Solution Approach 2:
The invention segments the rear cavity into a first rear cavity (inside the speaker) and a second rear cavity (outside the speaker) using the covering shell. This segmentation allows sound-absorbing particles to be filled in the second rear cavity, increasing the overall filling area while maintaining proper acoustic separation
3Stability of the object's composition
If a mesh assembly is provided, then the rear cavity can be fully enclosed, but the fixing method becomes complicated and unstable
Solution Approach 1:
The invention removes the mesh assembly entirely and replaces it with a covering shell that provides structural enclosure. The covering shell's rigid structure inherently provides stable enclosure of the rear cavity without requiring additional fixing mechanisms, thereby improving fixing reliability
Solution Approach 2:
The covering shell merges the enclosure function and support function into a single integrated component. This unified structure provides both stable rear cavity enclosure and reliable support for the sound-generating unit through its inherent structural design, eliminating the instability associated with separate mesh and support assemblies
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
The design enhances acoustic performance and stability while simplifying the manufacturing process and reducing costs, with the recessing portion providing effective sound absorption and leakage structure through efficient stamping methods.
Implementation Method 1
A plurality of sound-absorbing particles is filled in the second rear cavity
Data Source
AI summary
The present invention provides a speaker box including a housing with a sound hole and a speaker therein. The speaker includes a frame, a vibration system, a magnetic circuit system, and a covering shell. The vibration system includes a diaphragm dividing a receiving room of the housing into a front cavity communicating with the sound hole and a rear cavity, a voice coil assembly. The magnetic circuit system includes a yoke. The covering shell divides the rear cavity into a first rear cavity inside the speaker and a second rear cavity outside the speaker. The covering shell includes a bottom wall and a side wall. A recessing portion formed on the side wall, and the recessing portion communicates the first rear cavity with the second rear cavity.