Coaxial Loudspeaker Dust-Proof Ring Sealing
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Solution Overview
Problem
Coaxial loudspeakers face issues with dust and water ingress through the voice coil, reducing their service life, especially in applications like car audio where sealing and waterproofing are critical.
Innovation Solution
A rubber dust-proof ring is installed between the voice coil of the bass unit and the top end portion of the cabin, bonded to both, with a design that includes semi-circular arcs to minimize interference with the speaker's operation and visibility, using a bolt connector for secure mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the high-pitched unit is mounted on the T-iron of the bass unit through a frame passing through the voice coil of the bass unit, then the frequency width of single speaker is increased, but water and sundries can enter the magnetic system through the voice coil interior, greatly reducing the service life of the loudspeaker unit
Solution Approach 1:
A dust-proof ring is introduced as an intermediary component between the voice coil and the magnetic circuit system. This dust-proof ring effectively blocks water and sundries from entering the magnetic system through the voice coil interior, while allowing the frame structure to pass through and support the high-pitched unit, thus maintaining the frequency width advantage
Solution Approach 2:
The dust-proof ring is made of rubber material, which forms a flexible sealing barrier. This flexible membrane structure prevents harmful substances from penetrating into the magnetic system while accommodating the structural requirements of the coaxial speaker assembly
2Adaptability or versatility
If the high-pitched unit is mounted on the T-iron of the bass unit through a frame passing through the voice coil of the bass unit, then the frequency width of single speaker is increased, but the dust-proof cover cannot be installed on the bass unit, reducing sealing and waterproof performance
Solution Approach 1:
The dust-proof ring serves as a mediator that provides sealing functionality without interfering with the frame structure that passes through the voice coil. This allows both the high-pitched unit mounting and the dust-proof cover installation to coexist, maintaining both frequency width and waterproof performance
Solution Approach 2:
The dust-proof ring is nested within the voice coil structure, forming a layered protection system. The dust-proof cover can be installed on the bass unit while the dust-proof ring provides additional sealing at the voice coil level, creating a nested defense against water and dust ingress
Data Source
Figure 1
Figure 2~3
AI summary
The present invention relates to a coaxial speaker, which has better dust-proof and water-proof performance. The coaxial loudspeaker comprises a bass unit 1 and a high-pitched unit 2 coaxially arranged, the bass unit 1 comprises a T-iron 14, a diaphragm 12 and a voice coil 13 connected to the diaphragm 12. The coaxial loudspeaker further comprises a cabin 3 fixed on the T-iron 14, a lower portion 32 of the cabin 3 passes through the voice coil13 to connect with the T-iron 14, a top end portion 31 of the cabin 3 is located above the diaphragm 12, the high-pitched unit 2 is arranged on the top end portion 31 of the cabin 3, and the coaxial loudspeaker further comprises a dust-proof ring 5 having an upper edge connected with the top end portion 31 of the cabin 3 and a lower edge connected with the upper portion of the voice coil 13.