Speaker Diaphragm Fixing Portion for Miniaturization
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Solution Overview
Problem
Conventional speakers in portable electronic devices face challenges in miniaturization due to the diaphragm occupying outer space, which affects the size and reliability of the terminal product.
Innovation Solution
The speaker design includes a diaphragm with bending fixing portions that extend along the vibrating direction and attach to the inner peripheral side of the frame, improving bonding strength and controlling the appearance size, featuring a ring-shaped suspension structure and reinforcing portions to enhance fixing and acoustic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rubber edge is provided on the outer side of the frame to increase bonding force, then the bonding strength between rubber and frame is improved, but the outer peripheral size of the speaker increases
Solution Approach 1:
The fixing portion extends in the vertical direction (along the vibrating direction) rather than only in the horizontal plane, attaching to the inner peripheral side of the frame. This dimensional change allows the bonding interface to utilize the frame's height, providing sufficient bonding strength without increasing the outer peripheral footprint of the speaker.
Solution Approach 2:
Instead of extending the bonding structure outward from the outer side of the frame, the fixing portion is designed to extend inward and attach to the inner peripheral side of the frame. This inverted approach maintains bonding strength while avoiding the space occupation problem on the outer side.
2Strength
If the diaphragm occupies the space on the outer peripheral side of the frame, then the bonding area is increased, but the size of the speaker increases
Solution Approach 1:
The bonding area is increased by utilizing the vertical dimension through the extending fixing portion that attaches to the inner peripheral side of the frame, rather than expanding the bonding area in the horizontal plane. This allows sufficient bonding area without increasing the speaker's outer peripheral size.
3Volume of stationary object
If a thin steel ring is used for the frame to make full use of internal space, then the volume of the speaker is reduced, but the reliability is compromised
Solution Approach 1:
The fixing portion is designed with a bent curvature extending from the diaphragm's outer periphery. This curved structure efficiently utilizes the limited internal space while providing sufficient bonding length and mechanical strength, maintaining reliability within the compact thin steel ring frame structure.
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 design effectively miniaturizes the speaker by improving the bonding strength between the frame and diaphragm, maintaining acoustic performance while reducing the outer size, facilitating the miniaturization of portable electronic devices.
Implementation Method 1
a voice coil inserted in the magnetic gap to drive the diaphragm to vibrate
Implementation Method 2
drive the diaphragm to vibrate and produce sound
Data Source
AI summary
Provided is a speaker, including a frame; a vibration unit fixed to the frame; and a magnetic circuit unit driving the vibration unit to vibrate and provided with a magnetic gap. The vibration unit includes a diaphragm fixed to the frame and a voice coil inserted in the magnetic gap to drive the diaphragm to vibrate and produce sound; an outer periphery of the diaphragm bends and extends to form at least one fixing portion; and the at least one fixing portion extends along a vibrating direction of the diaphragm and is attached to an inner peripheral side of the frame. With this structure, the bonding strength of the frame and the diaphragm is improved, the diaphragm does not occupy an outer space of the frame, and an appearance size of the speaker is effectively controlled, thereby facilitating the miniaturization design.