Point Vibration Speaker Using Shaft to Eliminate Plate
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Solution Overview
Problem
Conventional speakers require a large volume due to the need for a vibration plate to propagate sound energy, leading to inefficiencies and inconvenience in use.
Innovation Solution
A point vibration speaker design that eliminates the vibration plate by using a magnetic circuit module, voice coil unit, and excitation module with a shaft and supporter to directly contact and excite a vibration object, allowing for miniaturization and control of sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vibration plate is used to propagate sound energy, then sound can be generated, but the speaker volume becomes large
Solution Approach 1:
The patent removes the vibration plate from the conventional speaker structure and replaces it with a shaft that directly contacts the vibration object. This extraction of the vibration plate eliminates the need for a large box-shaped case, thereby reducing speaker volume while maintaining sound generation capability through direct contact vibration transmission.
Solution Approach 2:
The shaft acts as an intermediary element between the voice coil unit and the vibration object. Instead of using a vibration plate to propagate sound energy, the shaft directly transmits vibration to the vibration object, enabling sound generation without requiring a large volume for the vibration plate and case structure.
2Reliability
If a vibration plate is used to propagate sound energy, then sound can be generated, but energy is offset and dissipated
Solution Approach 1:
By removing the vibration plate and its associated phase cancellation problems, the patent eliminates energy offset and dissipation. The shaft directly transmits vibration to the vibration object without the phase opposition that occurs when sound waves propagate forward and backward from a vibration plate, thereby reducing energy loss.
3Reliability
If a vibration plate is used to propagate sound energy, then sound can be generated, but the speaker structure becomes complex
Solution Approach 1:
The patent simplifies the speaker structure by removing the vibration plate and case structure. The shaft directly contacts the vibration object to generate sound, eliminating the need for complex vibration plate mounting structures, case reinforcements, and air resonance management, thereby reducing overall structural complexity.
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 minimizes speaker size, enables selection of desired sound quality based on the vibration object's characteristics, and enhances sound performance by eliminating energy dissipation and air resistance.
Implementation Method 1
a voice coil vertically vibrates with an electromagnetic force generated by an interaction between a magnetic force of a magnetic circuit and a magnetic field of the voice coil
Implementation Method 2
an elastic member connected to the frame and the voice coil unit. Moreover, the elastic member is a plate spring
Data Source
AI summary
The present invention comprises: a magnetic circuit module forming a magnetic gap; a voice coil part which is disposed in the magnetic gap and vibrates along a vibration axis; and an excitation module which is connected to the voice coil part and includes a shaft extending along the vibration axis, wherein the volume of a speaker is minimized and the position relative to a vibrated object can be changed to select the desired sound quality.