Bone Conduction Receiver Sealed Structure and Magnetic Amplification
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Solution Overview
Problem
Conventional bone conduction receivers suffer from low magnetic field intensity and adverse effects of ambient noise, which hinder efficient sound transmission.
Innovation Solution
A bone conduction receiver design featuring a sealed structure with a washer to amplify magnetic induction, a coil surrounding the magnet and washer, and a filter circuit to reduce noise, enhancing acoustic performance and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional solid-medium conduction receiver is used, then the structure is simple, but the magnetic field intensity is low and ambient noise adversely affects sound transmission
Solution Approach 1:
The receiver is divided into multiple functional modules: a sealed receiving space containing the vibration reed, a separate magnet assembly with holder, a coil assembly, and a filter circuit. This segmentation allows each component to be optimized independently for its specific function while improving overall sound transmission quality.
Solution Approach 2:
A holder is introduced as an intermediary component to position and secure the magnet at a specific distance from the vibration reed. This intermediary structure enables precise control of the magnetic field intensity and provides stable mechanical support, resolving the issue of low magnetic field strength in conventional designs.
2Use of energy by moving object
If the magnet is positioned close to the vibration reed to increase magnetic field intensity, then magnetic utilization improves, but the risk of ambient noise interference increases
Solution Approach 1:
The holder pre-positiones the magnet at an optimized distance from the vibration reed before operation, establishing the ideal magnetic field intensity while maintaining sufficient spacing to reduce ambient noise interference. This preliminary positioning prevents both excessive proximity (noise interference) and excessive distance (weak magnetic field).
Solution Approach 2:
The holder acts as a sacrificial or replaceable component that can be easily adjusted or replaced to optimize magnet positioning. This allows for precise control of magnetic field parameters without permanently fixing the magnet-reed distance, enabling optimization of magnetic utilization while maintaining noise resistance.
3Object-affected harmful factors
If a sealed structure is implemented to prevent ambient noise, then noise resistance improves, but manufacturing complexity increases
Solution Approach 1:
The sealed structure is achieved by dividing the receiver into a sealed receiving space and an external environment, with the lid serving as the seal boundary. This segmentation approach creates noise isolation without requiring complex manufacturing, as the seal is formed by simple joining of the lid to the receiver body.
Solution Approach 2:
The lid serves multiple functions: it seals the receiving space to prevent ambient noise entry, provides mounting surfaces for the coil and filter circuit, and structurally supports the internal components. This multi-functionality reduces the need for additional separate components, simplifying manufacturing despite the sealed design.
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 improves magnetic utilization, acoustic performance, and noise filtration, resulting in more efficient sound transmission and user experience by ensuring a waterproof seal and reducing operational noise.
Implementation Method 1
The bone conduction receiver includes an outer casing, a vibration reed, a magnet, a washer, a coil, and a lid... A first end of the coil is fixed to an inner surface of the lid, and a second end of the coil extends into the first receiving space and coils around the magnet and the washer
Implementation Method 2
Sound travels easily through solid matter such as metal or bone. The conduction of sound in a solid medium is by converting sound to mechanical vibration with different frequencies, and such vibrations or waves can be transmitted through the skull, bony labyrinths, linner ear lymphs, Corti's organ, and the auditory hub
Implementation Method 3
The washer is arranged at a side of the magnet away from the vibration reed... The coil surrounds the magnet and the washer
Data Source
AI summary
A conduction receiver utilizing sound transmission through a solid medium includes an outer casing, a vibration reed, a magnet, a washer, a coil, and a lid. The lid covers surfaces of the outer casing to form a sealed first receiving space. The vibration reed, the magnet, the washer, and the coil are all arranged in the first receiving space. A peripheral surface of the vibration reed is coupled to the outer casing. The magnet is arranged at a side of the vibration reed away from a bottom of the outer casing. The washer is arranged at a side of the magnet away from the vibration reed. A first end of the coil is fixed to an inner surface of the lid, and a second end of the coil extends into the first receiving space and is coiled around the magnet and the washer. An electronic device is also provided.