Speaker Frame Rib Height Variation for Stress Distribution
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Solution Overview
Problem
Conventional speaker device frames experience stress concentration at connecting parts between the outer peripheral wall of the magnetic circuit housing unit and arm parts, leading to inefficient material usage and increased weight due to uniform rib heights across all parts.
Innovation Solution
A speaker device frame design where the rib height is varied, with a larger height at connecting parts between the arm and rib to enhance strength and a smaller height elsewhere to reduce material usage and weight, allowing for a lighter frame without compromising strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform rib height is used across all parts of the frame, then manufacturing is simplified, but material usage increases and weight increases
Solution Approach 1:
The patent applies local quality by varying the rib height according to the specific functional requirements of different frame regions. Connecting parts have larger rib heights to provide structural support and stress distribution, while non-connecting parts have smaller rib heights to reduce material usage. This localized differentiation optimizes the frame weight without compromising manufacturing feasibility.
2Ease of manufacture
If uniform rib height is used across all parts of the frame, then manufacturing is simplified, but material usage increases
Solution Approach 1:
The patent implements local quality by differentiating rib heights based on structural needs. Connecting parts require larger ribs for strength and stress distribution, while non-connecting parts use smaller ribs to minimize material consumption. This approach significantly reduces overall material usage while maintaining manufacturing simplicity through a standardized varying-height rib design.
3Strength
If larger rib height is used at connecting parts, then strength is improved, but material usage increases
Solution Approach 1:
The patent applies local quality by concentrating larger rib heights specifically at connecting parts where stress concentration occurs during speaker operation. This localized reinforcement improves the strength of critical joints between the magnetic circuit housing unit and arm parts, while non-connecting parts use smaller ribs to minimize material usage. The design optimizes material distribution according to actual stress requirements.
Data Source
AI summary
A speaker device includes a magnetic circuit system and a vibration system including a frame. The frame has a magnetic circuit housing unit housing the magnetic circuit, an outer peripheral portion arranged on an outer side thereof and having an annular shape, and plural arm parts connecting the magnetic circuit housing unit and the outer peripheral portion. A damper mounting part on which an outer peripheral portion of a damper is mounted is formed at the outer peripheral portion of the magnetic circuit housing unit. A rib upwardly standing is provided at the outer peripheral portion of an upper surface of the damper mounting part. The height of the vicinity of the connecting part between the rib and the arm part is set larger than the height of the rib corresponding to an area other than the vicinity, and thus the height of the rib is partly different. By reflecting this, the part of the rib corresponding to the connecting part between the rib and the arm part is formed to have a mountain shape when observed from the side. The height of the rib corresponding to the connecting part between the rib and the arm part is set to the height capable of withstanding the stress operating on the connecting part between the rib and the arm part at the time of the driving of the speaker device, and the height capable of regulating the position of the damper when the damper is mounted on the damper mounting part.