Loudspeaker Frame Varying Thickness Weight Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a demand for further weight reduction in in-vehicle loudspeaker units to improve automobile energy consumption, and existing loudspeaker designs do not adequately achieve this while maintaining structural integrity and performance.
Innovation Solution
A loudspeaker unit design featuring a frame with a first support part, a second support part, a pedestal part, and reinforcement parts, where the reinforcement parts have varying heights to optimize weight reduction while maintaining rigidity and air-tightness, using resin molding for ease of production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the frame is made lighter to reduce overall weight, then weight reduction is achieved, but structural strength and rigidity deteriorate
Solution Approach 1:
The frame employs varying thickness design where different regions have different thickness values. The first region (supporting the diaphragm) has a first thickness, while the second region (supporting the magnetic circuit) has a second thickness different from the first. This local variation in thickness allows the frame to maintain sufficient strength and rigidity at critical load-bearing areas while reducing overall weight by thinning non-critical regions.
2Strength
If reinforcement ribs are added to strengthen the frame, then strength and rigidity are improved, but weight increases
Solution Approach 1:
The invention changes the geometric parameters of the frame by implementing varying thickness regions instead of uniform thickness or traditional reinforcement ribs. By optimizing the thickness distribution across different regions, the frame achieves the necessary strength and rigidity without adding excess weight through traditional reinforcement methods.
3Weight of moving object
If the frame structure is simplified to reduce weight, then weight reduction is achieved, but air-tightness and water-tightness deteriorate
Solution Approach 1:
The frame design applies local quality optimization by varying thickness in specific regions while maintaining the overall integrated structure. The first region with first thickness and second region with second thickness are designed to preserve sealing surfaces and structural continuity, ensuring air-tightness and water-tightness are maintained even with reduced overall material usage.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A loudspeaker unit includes a frame, a diaphragm having an inner periphery and an outer periphery, and a magnetic circuit coupled to the frame. The frame includes a first support part, a second support part, a pedestal part, and a plurality of reinforcement parts. The first support part supports the outer periphery of the diaphragm, and the second support part supports the magnetic circuit. The pedestal part spreads outward from the outer periphery of the first support part. The plurality of reinforcement parts are disposed side by side along the periphery of the pedestal part and fixed to the outer periphery of the first support part and the pedestal part. Each of the plurality of reinforcement parts includes a first portion having a first height relative to the pedestal part, and a second portion having a second height lower than the first height.