Speaker Yoke Sidewall Magnetic Gap Design
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Solution Overview
Problem
Conventional speakers with a flat-plate yoke structure lack magnetic conduction in the short-axis direction, limiting their performance by preventing vibration units from receiving magnetic conduction in this direction.
Innovation Solution
A speaker design with a hollow rectangular holder and a magnetic circuit unit that includes a yoke with sidewalls extending from the bottom wall, forming second magnetic gaps perpendicular to the main magnet, allowing for magnetic conduction in both the long and short axis directions, thereby enabling effective vibration in both directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the yoke uses a flat-plate structure with auxiliary magnet only in the long axis direction, then the structure is simple, but magnetic conduction in the short axis direction is lost
Solution Approach 1:
The patent extends the auxiliary magnet from a single-direction (long axis) arrangement to a multi-directional arrangement by adding a second auxiliary magnet in the short axis direction, creating magnetic gaps in both directions. This dimensional expansion of the magnetic circuit structure enables magnetic conduction in multiple axes simultaneously, resolving the contradiction between structural simplicity and magnetic conduction reliability.
2Ease of manufacture
If the auxiliary magnet is provided only in the long axis direction, then the manufacturing process is simple, but the speaker performance is limited
Solution Approach 1:
The yoke structure is designed to serve multiple functions: it provides magnetic conduction in both the long axis direction (original function) and the short axis direction (new function). By making the magnetic circuit multi-functional, the speaker can utilize magnetic fields from multiple directions to drive the vibration unit, thereby improving overall performance while maintaining ease of manufacture through the integrated yoke design.
3Device complexity
If magnetic conduction is provided only in the long axis direction, then the magnetic circuit structure is simple, but the response speed and amplitude are limited
Solution Approach 1:
The magnetic circuit is segmented into multiple independent magnetic gaps: a first magnetic gap in the long axis direction and a second magnetic gap in the short axis direction. Each gap can independently contribute to driving the vibration unit, allowing the system to achieve faster response speeds and greater amplitude through combined multi-directional magnetic forces, while keeping each individual magnetic gap structurally simple.
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 enhances the response speed and amplitude of the speaker, improving its overall performance by providing magnetic conduction in both axis directions, thus addressing the limitations of conventional speakers.
Implementation Method 1
The magnetic circuit unit is configured to drive the vibration unit to vibrate and sound. The magnetic circuit unit includes a yoke, a main magnet and an auxiliary magnet that are fixed on the yoke. The main magnet and the auxiliary magnet are spaced apart to form a magnetic gap.
Implementation Method 2
it is impossible to provide the vibration unit with magnetic conduction to in the short-axis direction of the yoke, thereby affecting a performance of the speaker
Data Source
AI summary
The present invention discloses a speaker, including a holder, a vibration unit and a magnetic circuit unit that are fixed to the holder. The magnetic circuit unit includes a yoke fixed to the holder, a main magnet and an auxiliary magnet that are assembled on the yoke. The main magnet is spaced apart from the auxiliary magnet to form a first magnetic gap. The yoke includes a bottom wall and a sidewall formed by extending from a periphery of the bottom wall while being bent. The main magnet and the auxiliary magnet are assembled on the bottom wall. The auxiliary magnet is provided along a long axis direction of the bottom wall. The sidewall is located in a short axis direction of the bottom wall, and the sidewall is spaced apart from the main magnet to form a second magnetic gap.