Acoustic Transducer Installation Structure for Dimensional Change
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Solution Overview
Problem
Acoustic transducers in musical instruments face operational failures due to dimensional changes in the vibrated body, leading to interference between the vibrating unit and magnetic-path forming portion, which disrupts electromagnetic coupling and sound generation.
Innovation Solution
An installation structure with a magnetic-path forming portion, a vibrating unit, and a connecting member with joint portions that allow for inclination, ensuring proper alignment and vibration transmission despite horizontal displacements of the vibrated body, maintaining electromagnetic coupling and sound generation over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vibrated body is fixed rigidly to maintain stable electromagnetic coupling, then electromagnetic coupling is maintained, but the structure cannot accommodate dimensional changes due to temperature and humidity, leading to operational failure over time
Solution Approach 1:
The connecting member is designed to be flexible rather than rigid, allowing it to dynamically adjust to dimensional changes in the vibrated body while maintaining electromagnetic coupling. The flexibility enables the system to adapt to thermal expansion and humidity-induced deformation without compromising the stability of the electromagnetic coupling between the vibrating unit and magnetic-path forming portion.
2Stability of the object's composition
If the connecting member is made rigid to ensure stable vibration transmission, then vibration transmission is stable, but horizontal displacement of the vibrated body causes interference between the vibrating unit and magnetic-path forming portion
Solution Approach 1:
The connecting member exhibits different mechanical properties at different locations: it is rigid in the vertical direction to ensure stable vibration transmission from the vibrating unit to the vibrated body, while being flexible in the horizontal direction to accommodate dimensional changes and prevent interference. This anisotropic design allows the same component to simultaneously achieve stable vibration transmission and tolerance to horizontal displacement.
3Reliability
If the flange is fixed to the soundboard to maintain acoustic transducer function, then sound generation is maintained, but dimensional change of the soundboard causes displacement of the vibrating unit leading to operational failure
Solution Approach 1:
The flexible connecting member acts as a cushioning element that anticipates and absorbs dimensional changes in the soundboard before they can cause harmful displacement of the vibrating unit. By being installed beforehand with flexible properties, it prevents the soundboard's thermal expansion and humidity-induced deformation from disrupting the electromagnetic coupling, thereby extending the operational lifespan of the acoustic transducer.
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 effectively maintains the vibrating function of acoustic transducers by absorbing horizontal displacements of the vibrated body, ensuring continuous electromagnetic coupling and sound production even with dimensional changes, thus extending the operational lifespan of the transducers.
Implementation Method 1
a vibrating unit (200) having an electromagnetic coupling portion (EM) electromagnetically coupled to the magnetic-path forming portion, the vibrating unit being configured to vibrate in the first direction when the electromagnetic coupling portion is driven by the magnetic-path forming portion
Implementation Method 2
a connecting member (R; R1; R3) disposed between (a) a part of the vibrated body or a fixed portion (111; 1111; 311) fixed to the vibrated body and (b) the vibrating unit, the connecting member transmitting vibration of the vibrating unit to the vibrated body
Data Source
AI summary
An installation structure for an acoustic transducer that operates in accordance with an audio signal to vibrate a vibrated body in a first direction for permitting the vibrated body to generate sounds, including: a magnetic-path forming portion; a vibrating unit configured to vibrate in the first direction; a connecting member disposed between: a part of the vibrated body or a fixed portion fixed to the vibrated body; and the vibrating unit, for transmitting vibration of the vibrating unit to the vibrated body; a first joint portion that connects a first end portion of the connecting member to the vibrating unit for enabling the connecting member to be inclined with respect to an axis extending in the first direction; and a second joint portion that connects a second end portion of the connecting member to the fixed portion for enabling the connecting member to be inclined with respect to the axis.