Speaker Edge Dome Adhesive Structure for Larger Vibrating Area
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Solution Overview
Problem
Conventional speaker diaphragm structures result in a significant loss of effective vibration area due to the edge dome's outermost structure design, leading to reduced sound pressure and limitations in thin-walled speaker applications.
Innovation Solution
A novel adhesive structure is introduced for the edge dome of the diaphragm, with a first adhesive portion extending outward and a complementary second adhesive portion on an adhesion target member, forming an adhered portion with a thickness of 0.2 mm or less from the outermost point to the edge dome start, and an angle of 30 to 90° between the first adhesive portion and the horizontal plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the edge dome is designed with a horizontal outermost surface contacting the ring, then the structure is simple and stable, but the effective vibration area is reduced due to the lost portion
Solution Approach 1:
The adhesive portion is segmented into a first adhesive portion on the edge dome and a second adhesive portion on the adhesion target member, allowing independent optimization of each segment's geometry and material properties to maximize vibration area while maintaining structural stability
Solution Approach 2:
The adhesive portion is designed with a downward inclination at 30-90 degrees, transitioning from a horizontal 2D contact to a tilted 3D surface, which extends the adhesive contact area and eliminates the lost portion while maintaining stable fixation
2Area of moving object
If the adhesive portion thickness is reduced to 0.2 mm or less, then the effective vibration area is maximized, but the stability and durability may be compromised
Solution Approach 1:
The adhesive portion is designed with specific geometric parameters including a downward inclination angle of 30-90 degrees and a thickness of 0.2 mm or less, which optimizes the balance between vibration area maximization and structural reliability through precise parameter control
Solution Approach 2:
The adhesive portion utilizes adhesive materials with optimized properties that provide sufficient bonding strength and durability despite the reduced thickness, achieving reliable fixation while minimizing the lost portion and maximizing vibration area
3Strength
If the diaphragm plate thickness is increased to exceed 100 μm, then the structural strength is improved, but it does not fit TWS application requirements
Solution Approach 1:
The diaphragm plate thickness is optimized to 100 μm or less, and the adhesive portion thickness is reduced to 0.2 mm or less, achieving the necessary thinness for TWS applications while maintaining sufficient structural strength through improved material properties and geometric design
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 maximizes the effective vibration area, enhances magnetic flux density, increases coil length, and improves sound pressure level, while maintaining stability and durability, suitable for ultra-small speakers.
Implementation Method 1
an adhered portion is formed by adhesion between the first and second adhesive portions
Data Source
AI summary
The present invention provides a structure maximizing an effective vibration area in a speaker. The structure includes the first adhesive portion of the edge dome of a diaphragm, and an adhesion target member having a second adhesive portion configured to be adhered to the first adhesive portion. An adhered portion is formed by adhesion between the first and second adhesive portions. The thickness from the outermost point of the structure to the point where the edge dome starts, excluding the portion where the adhered portion is formed in the edge dome, is 0.2 mm or less.