Micro Speaker Unit Waterproofing via Chamber Isolation
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Solution Overview
Problem
Conventional micro speaker units face compromised waterproofing due to inadvertent assembly or damage to the waterproof ring during installation, leading to reduced lifespan.
Innovation Solution
A micro speaker unit design featuring an outer casing with interconnected sound holes, a vibrating diaphragm assembly, and a magnetic assembly, where an elastic connector separates the internal space into a front and rear chamber, using an elastic latching member and connecting member to maintain a non-connected state and prevent moisture ingress, with components formed from silicon injection molding for enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a waterproof ring is installed between the micro speaker and the casing to prevent moisture ingress, then the waterproof effect is improved, but the reliability deteriorates due to inadvertent assembly or damage during installation
Solution Approach 1:
The patent removes the separate waterproof ring component from the assembly and integrates the waterproof sealing function directly into the vibrating diaphragm assembly structure. The waterproof sealing is achieved through the integrated design of the vibrating diaphragm, frame, and surrounding sealing structures, eliminating the need for additional waterproof rings that require manual installation and are prone to damage or improper assembly.
2Reliability
If a waterproof ring is used to block moisture, then the waterproof effect is improved, but the device complexity increases due to additional components
Solution Approach 1:
The patent merges the waterproof sealing function with the vibrating diaphragm assembly by integrating the sealing structures directly into the diaphragm, frame, and surrounding components. This consolidation eliminates the need for separate waterproof rings and reduces the total number of components while maintaining effective moisture protection.
3Reliability
If the accommodation space is separated into front and rear chambers, then the waterproof effect is improved by isolating moisture, but the device complexity increases due to additional sealing structures
Solution Approach 1:
The patent designs the vibrating diaphragm assembly and its surrounding structures to serve multiple functions simultaneously: the frame and connecting members not only support the vibrating diaphragm for sound production but also create the separation between front and rear chambers and provide waterproof sealing. This multi-functionality achieves chamber isolation and moisture protection without requiring additional dedicated sealing components.
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 design effectively maintains a good waterproof effect, reduces noise interference, and extends the micro speaker unit's lifespan by isolating the front and rear chambers, ensuring water vapor is kept out while allowing sound to be transmitted through the sound holes.
Implementation Method 1
an elastic connector that is formed among the vibrating diaphragm, the frame and the outer casing. The elastic connector is provided with an elastic supporting member which is disposed between the vibrating diaphragm and the frame
Implementation Method 2
a voice coil that is connected with the vibrating diaphragm and is extended toward the magnetic assembly
Implementation Method 3
a magnetic assembly that is disposed in the rear chamber and inter-assembled with the vibrating diaphragm assembly
Data Source
AI summary
The present invention discloses a micro speaker unit with a waterproof effect, including an outer casing which is provided with an accommodation space and a sound hole, and a micro speaker which is installed in the accommodation space. The micro speaker is assembled from a vibrating diaphragm assembly and a magnetic assembly which is inter-assembled with the vibrating diaphragm assembly. The vibrating diaphragm assembly separates the accommodation space into a front chamber and a rear chamber which are not interconnected; whereas, the front chamber is connected with the sound hole. Therefore, water vapor outside the micro speaker unit can be prevented from entering into the rear chamber and the micro speaker by the vibrating diaphragm assembly, thereby improving the waterproof effect of the entire micro speaker unit.