Coaxial Speaker Shared Magnetic Circuit Height Reduction
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Solution Overview
Problem
Conventional coaxial speakers have complex structures with separate treble and bass units, leading to increased height, installation difficulties, higher production costs, and reduced market competitiveness, limiting their applicability and sound quality.
Innovation Solution
A coaxial speaker design featuring a compact structure with a magnetic circuit system and two coaxially aligned vibration systems, where the first vibration system generates treble sound and the second generates bass sound, sharing a common magnetic circuit system to reduce height and cost while enhancing sound quality, with the treble system capable of functioning as a receiver and the bass system as an anti-phase noise cancellation device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the treble unit and bass unit each include independent vibration systems and independent magnetic circuit systems, then the sound quality can be maintained, but the structure becomes complex and the overall height increases
Solution Approach 1:
The patent combines the treble magnetic circuit and bass magnetic circuit into a single shared magnetic circuit system. The magnetic circuit includes a magnetic ring with first and second magnetic poles, where the first voice coil is disposed in the first magnetic gap corresponding to the first magnetic pole, and the second voice coil is disposed in the second magnetic gap corresponding to the second magnetic pole. This merging of magnetic circuits reduces structural complexity and decreases the overall height of the speaker while maintaining independent vibration systems for treble and bass units.
2Ease of manufacture
If the treble unit and bass unit each include independent magnetic circuit systems, then the magnetic performance can be optimized, but the production cost increases
Solution Approach 1:
The patent merges two magnetic circuit systems into one shared magnetic circuit, reducing the quantity of magnetic materials and components required. The single magnetic ring serves both treble and bass units, thereby reducing production costs while maintaining optimized magnetic performance through dedicated magnetic gaps and poles for each voice coil.
Solution Approach 2:
The shared magnetic circuit system performs multiple functions: it provides magnetic field for the first voice coil (treble unit) and magnetic field for the second voice coil (bass unit) simultaneously. The magnetic ring structure serves as a universal magnetic path that supports both vibration systems, reducing overall manufacturing cost while maintaining reliable magnetic performance for both frequency ranges.
3Adaptability or versatility
If the overall height of the coaxial speaker is increased, then the installation space can be accommodated, but the applicability reduces
Solution Approach 1:
By merging the magnetic circuits of the treble and bass units into a single shared magnetic circuit system, the patent reduces the overall height of the coaxial speaker. The compact design with the first and second voice coils disposed in different magnetic gaps of the same magnetic ring allows the speaker to fit into smaller installation spaces, thereby expanding its applicability across various devices and scenarios.
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 achieves a compact, high-quality sound output with reduced production costs, improved installation convenience, and expanded application scenarios by integrating treble and bass sound generation within a shared magnetic circuit, while allowing the treble system to function as a receiver and the bass system to enhance noise cancellation.
Implementation Method 1
a first voice coil and a second voice coil, the first voice coil at least partially locates into the first magnetic gap, and the second voice coil at least partially locates into the second magnetic gap
Implementation Method 2
The magnetic circuit system includes a magnetic guiding plate, a first magnet disposed on a side of the magnetic guiding plate proximal to the first diaphragm
Data Source
AI summary
The present invention provides a coaxial speaker including a frame, a magnetic circuit system, a first vibration system, and a second vibration system. The second vibration system locates coaxially with the first vibration system. The first vibration system includes a first diaphragm and a first voice coil, the second vibration system includes a second diaphragm and a second voice coil. The magnetic circuit system includes a magnetic guiding plate, a first magnet, a second magnet forming a first magnetic gap with the first magnet, a third magnet, and a forth magnet. The forth magnet, the magnetic guiding plate, and the second magnet stack in sequence and form a second magnetic gap with the third magnet. The coaxial speaker has a common magnetic circuit system for sounding on the front and back sides, which can not only form a full-range speaker, but also can function as a receiver.