Linear Motor Fixed-Carrier Audio Design for Compact Bass Output
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Solution Overview
Problem
Existing audio devices face challenges in producing low-frequency sound in a compact form factor due to structural requirements such as acoustic cavity size, diaphragm design, sealing, ventilation, and heat dissipation, which limit their performance and space efficiency.
Innovation Solution
An audio device utilizing a linear motor within an enclosure connected to a rigid carrier via a fixed structure, transmitting vibrations to create resonance and output low-frequency sound, with features like square-shaped components and suction cups for attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional speaker design is used for low-frequency output, then sound quality can be maintained, but the device size and weight increase significantly
Solution Approach 1:
The patent combines the speaker unit and vibration feedback unit into a single integrated device housing. The speaker diaphragm serves dual functions: audio output and vibration feedback carrier. This merging eliminates the need for separate bass radiators or vibration motors, significantly reducing device weight while maintaining low-frequency output capability.
Solution Approach 2:
The speaker diaphragm is designed to perform multiple functions simultaneously: it acts as both the audio output element for low-frequency sound and the vibration feedback element for tactile responses. The housing structure also serves multiple purposes: acoustic enclosure, vibration transmission medium, and attachment interface for rigid carriers. This multi-functionality reduces the number of components and overall device weight.
2Power
If traditional subwoofer design is used, then bass performance is improved, but the acoustic cavity size requirement increases device volume
Solution Approach 1:
The patent transitions from traditional three-dimensional acoustic cavity requirements to a two-dimensional vibration transmission approach. Instead of relying on large enclosed volumes for bass resonance, the system uses the housing surface as a vibration transmission plane that couples with rigid carriers. This dimensional shift allows effective low-frequency output in a compact form factor.
Solution Approach 2:
The patent replaces the traditional acoustic resonance mechanism (relying on enclosed cavity volume) with a mechanical vibration transmission mechanism. The speaker diaphragm directly transmits vibrations through the housing to the rigid carrier, eliminating the need for large acoustic cavities while maintaining bass performance.
3Productivity
If rigid connection to carrier is implemented, then vibration transmission efficiency increases, but device complexity increases
Solution Approach 1:
The housing itself serves as the vibration transmission element, eliminating the need for separate vibration transmission components. The structural elements of the housing (walls, panels) directly conduct vibrations to the rigid carrier, making the connection structure self-serving rather than requiring additional dedicated components. This reduces device complexity while maintaining efficient vibration transmission.
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
Enables high-power low-frequency sound output in a compact form, facilitating applications in small speakers and gaming feedback devices with simplified production and quick attachment to rigid surfaces.
Implementation Method 1
the vibrations generated by the linear motor are transmitted through the fixed connecting structure to the rigid carrier, creating resonance and further inducing air vibration to output low-frequency signals
Implementation Method 2
A linear motor located within the enclosure and connected to the circuit board
Data Source
AI summary
This invention presents audio device that generates low-frequency sound through a fixed carrier linkage, featuring a housing with a circuit board and an attached linear motor. Inside the housing, a fixed surface with a connection structure for hard surfaces is present. The linear motor vibrates perpendicular to this fixed surface, receiving low-frequency signals from the circuit board, generating vibrations transmitted to the hard surface through the connection structure, resulting in resonance vibrations and low-frequency sound in the air.By utilizing a linear motor for low-frequency signal generation, this innovation achieves a compact size with substantial power output. Furthermore, the fixed connection between the housing and hard surface enhances vibration transmission, yielding even greater power output. This technology has versatile applications, including MINI speakers, mobile gaming feedback, resonating speakers, and similar products.