Speaker Diaphragm Bonding via Stepped Multi-Level Structure
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Solution Overview
Problem
Conventional speakers in mobile electronic devices face challenges in achieving optimal waterproof performance and sensitivity due to inadequate bonding strength between the diaphragm, front cover, and frame, which affects both bonding strength and effective radiation area.
Innovation Solution
The speaker design includes a housing with a magnetic circuit system and a vibration system featuring a diaphragm with a dome portion, suspension, and fixing portions, along with a frame and front cover configuration that increases the contact area through inclined surfaces, enhancing bonding strength and waterproof performance while maintaining a larger effective radiation area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the width of the gluing surface is increased to improve bonding strength and waterproof performance, then the bonding strength and waterproof performance are improved, but the effective radiation area of the speaker vibration system is reduced and sensitivity is lowered
Solution Approach 1:
The patent transitions from a traditional planar gluing surface to a three-dimensional stepped structure with multiple levels. The first fixing portion is positioned at a first height and the second fixing portion at a second height, creating a multi-level engagement structure that increases bonding area without extending the horizontal width, thus preserving the effective radiation area while improving waterproof performance
Solution Approach 2:
The fixing portion is divided into multiple segments (first fixing portion and second fixing portion) at different heights. This segmentation allows the glue to be applied to multiple surfaces vertically stacked, increasing the total bonding area without requiring a wider horizontal gluing surface, thereby resolving the contradiction between bonding strength and effective radiation area
2Strength
If the width of the gluing surface is increased to improve bonding strength, then the bonding strength is improved, but the effective radiation area is reduced
Solution Approach 1:
The patent utilizes the vertical dimension by creating a stepped structure with fixing portions at different heights. This allows the bonding area to be increased through vertical stacking rather than horizontal expansion, thereby improving bonding strength while maintaining the effective radiation area in the horizontal plane
Solution Approach 2:
The fixing portion is segmented into multiple levels (first and second fixing portions) that can be bonded separately. This segmentation enables the total bonding area to be distributed across multiple surfaces at different heights, increasing overall bonding strength without requiring a single wide gluing surface that would encroach on the effective radiation area
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
This configuration improves the bonding strength, waterproof performance, and sensitivity of the speaker by increasing the contact area between the diaphragm, frame, and front cover, preventing moisture ingress and enhancing acoustic performance.
Implementation Method 1
a magnetic circuit system in the accommodating space; a vibration system in the accommodating space, including a diaphragm assembled with the housing and a voice coil connected with the diaphragm for driving the diaphragm to vibrate
Data Source
AI summary
The invention discloses a speaker. The speaker includes a housing, a magnetic circuit system and a vibration system. The vibration system has a diaphragm and a voice coil. The housing includes a front cover and a frame. The diaphragm has a dome, a suspension and a fixing portion. The frame includes a first connecting wall and a second connecting wall extending from the first connecting wall. The front cover includes a third connecting wall and a fourth connecting wall. The fixing part includes a first fixing portion sandwiched between the first connecting wall and the third connecting wall and a second fixing part sandwiched between the second connecting wall and the fourth connecting wall. By virtue of the configuration, the speaker is provided with better waterproof performance and higher sensitivity.