Speaker Vibration Transmission via Elastic Mediator
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Solution Overview
Problem
Conventional speaker devices experience reduced sound transmission efficiency due to unwanted vibrations generated when coupled to a radiation plate, as no measures are taken to block motions other than the operation direction of the drive shaft.
Innovation Solution
A speaker device design where a vibration device is integrated with a diaphragm and a frame body, using an elastic body to block unwanted motions and apply an urging force in the drive shaft direction, ensuring efficient vibration transmission and clear sound production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the vibration device is coupled to the radiation plate to obtain sound volume, then sound output is improved, but unwanted vibrations in directions other than the drive shaft direction are generated, reducing sound transmission efficiency
Solution Approach 1:
The elastic body serves as an intermediary between the vibration device and the frame body, selectively transmitting vibrations. It allows drive shaft direction vibrations to pass through while blocking unwanted vibrations in other directions, thus improving sound transmission efficiency while maintaining sound output volume.
Solution Approach 2:
The elastic body provides direction-dependent vibration transmission properties. It is designed to be compliant in the drive shaft direction to transmit useful vibrations, while being restrictive in radial directions to block unwanted vibrations, creating local quality differences in different spatial directions.
2Reliability
If the elastic body is made stiffer to block unwanted motions more effectively, then vibration blocking performance is improved, but the urging force in the drive shaft direction may be reduced
Solution Approach 1:
The elastic body exhibits different mechanical properties in different directions: it is designed to be stiffer in radial directions to block unwanted motions effectively, while maintaining compliance in the drive shaft direction to preserve urging force and enable efficient vibration transmission.
3Device complexity
If the gap between the frame body and vibration device is reduced to improve integration, then structural compactness is improved, but the elastic body cannot effectively block unwanted motions
Solution Approach 1:
The elastic body is positioned as an intermediary component within the gap between the frame body and vibration device. This gap is essential for the elastic body to function as a mediator that selectively transmits and blocks vibrations in different directions, maintaining both structural integration and motion blocking effectiveness.
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 efficiently transmits vibrations from the vibration device to the diaphragm, securing sound volume and producing clear sound with a wide range, while preventing distortion and ensuring continuous vibration transmission.
Implementation Method 1
an elastic body provided facing the flat surface of the diaphragm with the frame body and the vibration device interposed therebetween... the elastic body blocks the motion of the vibration device in the directions the elastic body is provided together with the vibration device and the frame body
Implementation Method 2
the elastic body blocks the motion of the vibration device in the directions the elastic body is provided together with the vibration device and the frame body, and adds an urging force in the drive shaft direction of the vibration device to the vibration device
Data Source
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AI summary
An object is to provide a speaker device in which vibrations generated from a vibration device can be efficiently transmitted to a diaphragm, and thus sound volume can be secured and clear sound with a wide range can be produced. A speaker device 1 is a device in which a vibration device 3 is brought into contact with one flat surface of a diaphragm 2, and the device emits vibrations transmitted through the vibration device 3 from the diaphragm 2 as sound. The speaker device 1 includes: the diaphragm 2; the vibration device 3; a frame body 4 provided to the diaphragm 2 so as to surround the vibration device 3; and an elastic body 5 provided facing the flat surface of the diaphragm 2 with the frame body 4 and the vibration device 3 interposed therebetween. The frame body 4 is provided with a gap interposed between itself and an outer circumference of the vibration device 3. The elastic body 5 is laid across the frame body 4 and the vibration device 3, and fastened to the frame body 4 and the vibration device 3. The frame body 4, the vibration device 3, and the elastic body 5 are integrated with each other.