Partially Strengthened Loudspeaker Cone for Split Vibration Control
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Solution Overview
Problem
Existing loudspeaker vibrating cones fail to achieve a balance between minimizing weight and reducing split vibration, especially at medium and high frequencies.
Innovation Solution
A partially strengthened vibrating cone design where the diaphragm is reinforced only in the region adjacent to the voice coil, using a combination of first and second diaphragm sheets in a truncated cone shape, with the second diaphragm sheet being bonded to the first sheet to enhance strength without significantly increasing weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the vibrating diaphragm is made lighter, then the weight of the vibrating cone is reduced, but split vibration increases at medium and high frequencies
Solution Approach 1:
The patent applies local quality by making the first diaphragm sheet thicker only in the first region (adjacent to voice coil) while keeping the second region thinner. This localized thickness variation strengthens the area needing support without adding excessive weight to the entire diaphragm, thereby reducing split vibration while maintaining light weight.
Solution Approach 2:
The vibrating diaphragm is segmented into multiple regions (first region and second region) with different structural characteristics. The first region has enhanced strength through the first diaphragm sheet, while the second region remains lighter. This segmentation allows different parts of the diaphragm to have optimized properties for their specific functional requirements.
2Stability of the object's composition
If the vibrating diaphragm is strengthened to reduce split vibration, then split vibration decreases, but the weight of the vibrating cone increases
Solution Approach 1:
Instead of uniformly strengthening the entire diaphragm, the patent applies strengthening only where needed (first region adjacent to voice coil). The first diaphragm sheet provides enhanced strength locally, while the rest of the diaphragm remains lightweight, achieving vibration control without excessive weight gain.
Solution Approach 2:
The patent uses a composite structure consisting of a first diaphragm sheet (providing strength) and a second diaphragm sheet (providing light weight). This composite approach combines materials or structures with different properties to achieve both strength and light weight simultaneously in different regions of the diaphragm.
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 reduces split vibration at medium and high frequencies while maintaining a lightweight design, as evidenced by superior Sound Pressure Levels (SPL) compared to prior art.
Implementation Method 1
The second diaphragm sheet is bonded to the second diaphragm sheet portion of the first diaphragm sheet
Implementation Method 2
When the loudspeaker works, the voice coil vibrates in a magnetic gap, driving the vibrating diaphragm to vibrate to make a sound
Data Source
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AI summary
The present utility model provides a loudspeaker-purpose vibrating cone and a loudspeaker. The loudspeaker-purpose vibrating cone comprises a vibrating diaphragm arranged to be connected with a voice coil of the loudspeaker at a connecting position, the vibrating diaphragm comprises a first portion adjacent to the connecting position and a second portion far away from the connecting position, and the strength of the first portion of the vibrating diaphragm is greater than the strength of the second portion of the vibrating diaphragm.