Speaker Bobbin Radial Extension Reduces Adhesive
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Solution Overview
Problem
Conventional speaker designs face issues with sound clarity due to the need for large amounts of adhesive, which can lead to detachment of bonded components and degradation in sound reproduction capabilities.
Innovation Solution
A speaker design featuring a bobbin extension portion bonded to the vibrating unit, reducing the required adhesive amount and incorporating a honeycomb core with aluminum films to suppress standing waves, ensuring improved sound reproduction and clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a line contact bonding structure is used to connect the vibrating sheet and bobbin, then bonding strength can be sufficient, but a large amount of adhesive agent is required which degrades sound clarity
Solution Approach 1:
The invention transitions from line contact bonding (one-dimensional contact) to surface contact bonding (two-dimensional contact) by extending the bobbin's outer circumferential face in the radial direction. This dimensional change allows for adequate bonding strength with reduced adhesive agent quantity, as the adhesive is distributed over a larger surface area rather than being concentrated along a line.
2Reliability
If a large amount of adhesive agent is applied to ensure bonding strength, then components remain attached, but sound clarity deteriorates
Solution Approach 1:
By extending the bobbin's outer circumferential face radially to create a surface contact structure, the invention reduces the required adhesive agent amount while maintaining reliable component attachment. This dimensional change allows the adhesive to be spread over a larger area, ensuring sufficient bonding strength with minimal adhesive usage, thereby preventing sound clarity degradation.
3Power
If the bobbin is housed within the magnetic gap with coil wound around one end, then electromagnetic function is achieved, but the bonding structure to vibrating unit requires excessive adhesive
Solution Approach 1:
The invention extends the bobbin's outer circumferential face in the radial direction to create a surface contact bonding structure. This modification allows the bobbin to maintain its electromagnetic function (with coil wound around one end housed within the magnetic gap) while reducing the adhesive agent amount required for bonding to the vibrating unit, as the extended surface area distributes the bonding load more efficiently.
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 provides enhanced sound reproduction capabilities with reduced adhesive usage and improved sound clarity by preventing detachment and minimizing standing wave interference.
Implementation Method 1
a magnetic circuit having a magnetic gap, and held in the cavity side such that the magnetic gap faces the vibrating unit; and a bobbin having one end around which a coil is wound and which is housed within the magnetic gap
Implementation Method 2
incorporating a honeycomb core with aluminum films to suppress standing waves
Data Source
Figure 1(A)~1(B)
Figure 2
Figure 3
AI summary
It is a purpose of the present invention to provide a hearing-impaired person assistance speaker that emits sound waves having an increased sound pressure level so as to provide improved original sound production capabilities. The inner circumferential face of a coupler 199 is bonded to one end of a bobbin 124 that is the other end thereof around which a coil 148 is wound. A portion of the coupler 199 configured so that it extends outward is bonded to a vibrating unit 121. As described above, the bobbin 124 and the vibrating unit 121 are coupled with each other via the coupler 199, instead of a line-contact connection structure that connects them. This reduces an amount of adhesive agent that can lead to degradation in the sound clarity. Thus, the present embodiment provides improved sound clarity of the sound to be received by a hearing-impaired person.