Dynamic Magnet Loudspeaker Wall Vibration Volume Reduction

Solution Overview

Problem

Conventional loudspeakers in handheld devices face challenges in reducing spatial volume and weight while maintaining sound quality and directivity, leading to limited acoustic volume and directional sound issues.

Innovation Solution

A dynamic magnet loudspeaker design that eliminates the need for a diaphragm, frame, and damping membrane by using a hollow tube with a coil unit and a permanent magnetic element, where the coil's magnetic lines interact with the magnetic element to cause reciprocal vibration of the housing member's wall, producing sound without directional limitations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional loudspeaker components (frame, diaphragm, damping membrane) are used, then sound quality and directional control are improved, but spatial volume and weight increase significantly

Engineering Contradiction:

Improvesound qualityVSAvoidspatial volume

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The patent extracts and eliminates the frame, diaphragm, and damping membrane components from the conventional loudspeaker structure. By removing these unnecessary components, the invention achieves significant volume reduction while maintaining sound reproduction functionality through the direct vibration of the housing member wall.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent merges the housing member wall with the vibration source function. Instead of having a separate diaphragm component, the housing member wall itself serves as the vibrating element that produces sound, thereby reducing the number of parts and overall volume.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If conventional loudspeaker components (frame, diaphragm, damping membrane) are used, then sound quality and directional control are improved, but weight increases significantly

Engineering Contradiction:

Improvesound qualityVSAvoidweight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The patent extracts and eliminates the frame, diaphragm, and damping membrane components from the conventional loudspeaker structure. By removing these unnecessary components, the invention achieves significant volume reduction while maintaining sound reproduction functionality through the direct vibration of the housing member wall.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent merges the housing member wall with the vibration source function. Instead of having a separate diaphragm component, the housing member wall itself serves as the vibrating element that produces sound, thereby reducing the number of parts and overall weight.

Inventive Principle:

Principle #5Merging (Combining)

3Ease of operation

If conventional loudspeaker design is used, then directional sound control is improved, but sound clarity for users beside the device deteriorates

Engineering Contradiction:

Improvedirectional sound controlVSAvoidsound clarity

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

Instead of designing the loudspeaker to project sound directionally toward the front, the patent inverts the approach by allowing the housing member wall to vibrate in all directions. This inversion of the traditional directional projection concept enables sound to be heard clearly by users positioned at various angles, including beside the device.

Inventive Principle:

Principle #13The other way round (Inversion)

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 significantly reduces the spatial volume and weight of loudspeakers, enabling clear sound reproduction with low directivity, allowing users to hear the sound equally from the front and side, and enhances the competitiveness of handheld devices by improving sound quality and reducing manufacturing costs.

Implementation Method 1

When a current flows through and thereby magnetizes the coil unit, the magnetic lines generated by the coil unit and the magnetic lines generated by the magnetic element cause attraction or repulsion that drives the magnetic element to vibrate reciprocally

Methodology Applied

Scientific EffectElectromagnetic effect: Electromagnetic Induction

Implementation Method 2

the wall of the housing member vibrates synchronously with the magnetic element to make sound

Methodology Applied

Scientific EffectVibration: Vibration

Data Source

PatentUS8472645B2Device with dynamic magnet loudspeaker

Publication Date: 2013.06.25 THE WEATHER CHANNEL LLC

AI summary

The present invention is to provide a device with dynamic magnet speaker, which comprises a first housing member having a wall and a first magnetic element fixed on an inner surface of the wall; a seat having a first side connected to the first housing member to define a first receiving space between the first housing member and the first side of the seat; and a hollow tube fixedly provided on the seat and corresponding in position to the first magnetic element, wherein a first coil unit is fixedly mounted around the hollow tube, and the hollow tube extends toward the first magnetic element and is either mounted around an outer periphery of the first magnetic element or inserted in a first central hole of the first magnetic element, so as to not only reduce the weight and spatial volume thereof, but also substantially lower the directivity of sound produced.