Miniature Speaker Hearing-Aid Coil Relocation
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Solution Overview
Problem
Miniature speakers with hearing-aid voice coils suffer from higher harmonic distortion and lead wire breakage due to collisions between the vibrating voice coil and the hearing-aid voice coil, resulting in noise and reduced acoustic performance.
Innovation Solution
The hearing-aid voice coil is fixed on the upper housing with a stepped structure and an annular groove, preventing collisions by increasing the space beneath the vibrating diaphragm and enhancing the magnetic circuit system, while pads for electrical connections are strategically placed to avoid wire contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hearing-aid voice coil is fixed on the lower housing surrounding the magnetic circuit system, then the hearing-aid effect is achieved, but the space beneath the vibrating diaphragm becomes very small causing lead wire collisions
Solution Approach 1:
The patent relocates the hearing-aid voice coil from the lower housing to the upper housing, changing its spatial position from below to above the magnetic circuit system. This dimensional relocation creates sufficient space beneath the vibrating diaphragm for lead wire movement while maintaining the hearing-aid function through the upper housing's magnetic field
2Force
If the hearing-aid voice coil is positioned close to the magnetic circuit system on the lower housing, then the magnetic field strength is sufficient, but the vibrating voice coil lead wire contacts the hearing-aid voice coil during vibration
Solution Approach 1:
The patent extracts the hearing-aid voice coil from its traditional position surrounding the magnetic circuit system on the lower housing, and relocates it to the upper housing. This separation removes the harmful collision factor while preserving the magnetic field generation capability through the upper housing's magnetic circuit structure
3Reliability
If the lead wire of the vibrating voice coil has sufficient movement space, then the acoustic performance is good, but the hearing-aid voice coil cannot be properly positioned
Solution Approach 1:
The patent resolves the positioning difficulty by moving the hearing-aid voice coil to the upper housing, a different spatial dimension relative to the vibrating diaphragm. This relocation provides ample space for lead wire movement below the diaphragm while establishing a clear, fixed mounting position for the hearing-aid voice coil on the upper housing structure
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 improves acoustic performance, prolongs the speaker's service life, and enhances the hearing-aid effect by preventing collisions and increasing the magnetic field strength detected by hearing aids.
Implementation Method 1
audio electric signal is transformed into electromagnetic field through the hearing-aid voice coil, the hearing aid may be switched to such a mode, in which mode the signal is collected by an induction coil in the hearing aid
Implementation Method 2
the vibrating voice coil is subjected to the acting force of the electromagnetic field and moves up and down according to the polarities of the audio electric signal, thereby enabling the vibrating diaphragm to generate sounds
Data Source
AI summary
The present invention relates to the technical field of electroacoustic products. Disclosed is a miniature speaker. The miniature speaker comprises an upper housing and a lower housing combined together. A vibration system and a magnetic circuit system are accommodated in the space defined by the upper housing and the lower housing. The upper housing is disposed close to the vibration system. The miniature speaker also comprises a hearing-aid voice coil. The hearing-aid voice coil is fixed to the upper housing and is located at the inner side of the upper housing. The miniature speaker of the present invention solves the problem of poor acoustics caused by collision of a lead wire of a vibrating voice coil with a hearing-aid voice coil of a miniature speaker in the prior art, and the miniature speaker of the present invention has good acoustic performance and a better hearing-aid effect.