Speaker Frame Gap Design for Dust Ejection
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Solution Overview
Problem
Existing speaker apparatuses are insufficient in preventing dust, particularly iron sand, from entering the magnetic gap, especially in dusty environments, leading to potential drive failure.
Innovation Solution
The speaker apparatus incorporates a magnetic circuit, frame, and case design with strategically positioned holes and gaps that direct dust away from the magnetic gap, utilizing a coupling portion and a case that covers the magnetic circuit and frame, with a gap formed between the case's edge end and the frame, causing dust to travel opposite to the sound radiation direction, adhering to the magnetic circuit, and providing an accommodation portion to suppress entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a through-hole is formed in the magnetic circuit to allow dust passage, then dust protection is improved, but structural integrity and magnetic performance deteriorate
Solution Approach 1:
The dust protection function is segmented from the magnetic circuit by introducing a separate frame structure with through-holes. The frame acts as an independent dust management component, allowing dust to pass through the frame without compromising the magnetic circuit's integrity. This segmentation resolves the contradiction by assigning dust protection to the frame while preserving the magnetic circuit's structural strength.
Solution Approach 2:
The frame serves as an intermediary structure between the external environment and the magnetic circuit. It provides a controlled pathway for dust to exit the speaker unit through frame through-holes, preventing direct contact between dust and the magnetic circuit. This intermediary approach protects the magnetic circuit while still addressing dust accumulation issues.
2Stability of the object's composition
If the case tightly covers the frame, then structural stability is improved, but dust entry paths are blocked causing dust to accumulate and enter the magnetic gap
Solution Approach 1:
The gap between the case and frame is strategically positioned at specific locations to serve local dust ejection functions. Rather than uniformly sealing the case, localized gaps are created where dust can be effectively redirected. This local quality approach maintains overall structural stability while providing targeted dust protection at critical locations.
Solution Approach 2:
Instead of trying to completely seal the case to prevent dust entry, the design inverts the approach by creating controlled gaps that actively eject dust away from the magnetic gap. The gaps allow dust to escape and be redirected outward, using the case-frame interface as an active dust management feature rather than a passive sealing boundary.
3Reliability
If holes are added to the frame for dust passage, then dust protection is improved, but structural strength and airtightness deteriorate
Solution Approach 1:
The frame is designed to serve multiple functions simultaneously: it provides structural support, creates acoustic pathways, and manages dust ejection. The frame through-holes are integrated into this multi-functional design, allowing dust to pass through while maintaining the frame's overall structural role. This universality approach balances dust protection with structural requirements.
Solution Approach 2:
The frame is designed with flexible positioning capabilities, allowing slight adjustments in the gap between the case and frame. This flexibility enables optimization of dust ejection efficiency while maintaining adequate structural strength. The frame can be positioned to create the optimal balance between dust protection and structural integrity.
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
Effectively prevents dust from entering the magnetic gap by redirecting it away from the magnetic circuit and adhering it to the frame, significantly reducing the risk of drive failure due to dust ingress.
Implementation Method 1
a magnetic circuit; a frame... adhering it to the frame
Data Source
AI summary
A frame is coupled to a magnetic circuit. The frame includes a plurality of holes which are formed outside the coupling portion and opened toward the magnetic circuit. A case covers the magnetic circuit and the frame, and is opened on a sound radiation direction side. An outer circumferential portion of the case is located on the sound radiation direction side beyond the plurality of holes and forms a first gap with respect to the frame. The first gap is communicated with an opening of the case.