Speaker Module Plate Structure for Moisture Discharge
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Solution Overview
Problem
Speaker modules in electronic devices face issues with moisture ingress through the acoustic outlet, leading to degraded acoustic output due to limited space for moisture discharge between the diaphragm and the plate.
Innovation Solution
The speaker module design includes a second plate with a portion having a reduced thickness, creating a wider gap between the diaphragm and the plate to facilitate smooth discharge and removal of moisture through the acoustic outlet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the plate is formed with uniform thickness, then the structural strength is maintained, but the space for moisture discharge is limited
Solution Approach 1:
The plate is designed with non-uniform thickness, where a first portion has reduced thickness to create a first gap for moisture discharge, while a second portion maintains greater thickness for structural support. This local differentiation allows the plate to simultaneously provide adequate moisture discharge pathways and maintain necessary structural strength.
2Reliability
If the gap between diaphragm and plate is increased, then moisture discharge is facilitated, but the acoustic output may be degraded
Solution Approach 1:
The gap between the diaphragm and plate is localized to specific regions where moisture accumulation occurs, rather than increasing the gap uniformly across the entire acoustic outlet. This allows effective moisture discharge in critical areas while preserving acoustic performance in sound-critical regions.
Solution Approach 2:
The acoustic outlet is segmented into different functional zones: one portion with increased gap for moisture discharge and another portion with optimized gap for acoustic output. This segmentation allows each zone to perform its specific function without compromising the other.
Data Source
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Figure 2B
AI summary
An electronic device according to various embodiments of the present invention comprises: a housing including a front plate, a rear plate facing the opposite direction of the front plate, and a side member, which surrounds the space between the front plate and the rear plate and includes a speaker hole; a display disposed in a first direction of the housing; and a speaker module disposed inside the housing so as to correspond to the speaker hole, wherein the speaker module includes: a first plate disposed in a second direction opposite to the display; a speaker disposed in the second direction of the first plate; a diaphragm disposed in the second direction of the speaker; a second plate spaced apart from the diaphragm and disposed in the first direction of the rear plate; and an acoustic emission port formed between the diaphragm and the second plate, the second plate includes: a first portion having a first distance from the diaphragm; and a second portion having a second distance from the diaphragm, and the first portion can be thinner than the second portion.