Bone Conduction Laminated Transducer for Stronger Signal Pickup
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Solution Overview
Problem
Existing bone conduction sound transmission devices are complex and have insufficient connection strength among components, leading to reliability issues.
Innovation Solution
A laminated structure comprising a vibration unit and an acoustic transducer unit, with a base structure that vibrates to deform the vibration unit, generating an electrical signal through the deformation of the acoustic transducer unit, which includes layers such as elastic, piezoelectric, and electrode layers, and a suspension membrane structure for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing bone conduction sound transmission devices are used, then they can receive bone conduction acoustic signals, but the structure is too complex and manufacturing process requirements are high
Solution Approach 1:
The patent integrates the vibration unit and acoustic transducer unit into a single laminated structure where multiple functional layers (piezoelectric layer, elastic layer, electrode layers) are combined in one compact assembly. This merging reduces the number of separate components and simplifies the overall device structure while maintaining reliable connections between functional elements.
Solution Approach 2:
The laminated structure employs composite material layers including piezoelectric materials, elastic materials, and conductive electrode materials stacked together. This composite approach enables multiple functions (vibration sensing, signal generation, mechanical support) within a single integrated structure, reducing complexity while improving connection strength and reliability.
2Reliability
If existing bone conduction sound transmission devices are used, then they can convert bone vibration signals to electrical signals, but the connection strength among components is insufficient
Solution Approach 1:
The patent integrates the vibration unit and acoustic transducer unit into a single laminated structure where multiple functional layers (piezoelectric layer, elastic layer, electrode layers) are combined in one compact assembly. This merging reduces the number of separate components and simplifies the overall device structure while maintaining reliable connections between functional elements.
Solution Approach 2:
The patent optimizes parameters such as the thickness of each layer in the laminated structure, the material composition ratios, and the geometric dimensions of the vibration unit to achieve reliable connections without requiring high-precision manufacturing processes. By carefully selecting these parameters, the device achieves robust connections with standard manufacturing capabilities.
3Device complexity
If a laminated structure with multiple layers is used, then the structure becomes simpler and more stable, but the manufacturing process may become more challenging
Solution Approach 1:
The patent optimizes parameters such as the thickness of each layer in the laminated structure, the material composition ratios, and the geometric dimensions of the vibration unit to achieve reliable connections without requiring high-precision manufacturing processes. By carefully selecting these parameters, the device achieves robust connections with standard manufacturing capabilities.
Solution Approach 2:
The laminated structure is divided into distinct functional layers (piezoelectric layer, elastic layer, first electrode layer, second electrode layer) that can be manufactured and assembled separately. This segmentation allows each layer to be optimized independently and assembled using standard lamination techniques, reducing manufacturing difficulty while maintaining structural simplicity.
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 solution provides a simpler structure with improved stability and reliability, effectively converting bone conduction vibrations into electrical signals with a resonant frequency range of 1 kHz-5 kHz, enhancing noise immunity and signal quality.
Implementation Method 1
the acoustic transducer unit may include at least a first electrode layer, a piezoelectric layer, and a second electrode layer arranged in sequence from top to bottom
Data Source
AI summary
The present disclosure is of a bone conduction sound transmission device. The bone conduction sound transmission device includes of a laminated structure and a base structure. The laminated structure is formed by a vibration unit and an acoustic transducer unit. The base structure is configured to load the laminated structure. At least one side of the laminated structure is physically connected to the base structure. The base structure vibrates based on an external vibration signal, and the vibration unit deforms in response to the vibration of the base structure; and the acoustic transducer unit generates an electrical signal based on the deformation of the vibration unit.