Motor-Integrated Acoustic Output Module for Mobile Terminals
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Solution Overview
Problem
Conventional mobile terminals face challenges in securing a sufficient resonance space for audio output modules, leading to inadequate sound quality due to the integration of multiple components like speakers, motors, and magnets, which occupy valuable internal space and complicate manufacturing.
Innovation Solution
A motor-integrated audio output module is designed, incorporating a speaker frame with a diaphragm, a yoke, a motor, a voice coil, and outer magnets, where the motor is positioned to generate vibrations that enhance sound quality, and the module is integrated with the display unit to transmit vibrations, reducing the number of components and simplifying manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple components (speaker, motor, magnet) are integrated into a single audio output module, then device size is reduced and manufacturing is simplified, but the resonance space for the audio output module becomes insufficient, degrading sound quality
Solution Approach 1:
The patent combines the speaker, motor, and magnet into a single integrated audio output module. The motor is positioned within the speaker frame structure, and the magnet is integrated into the motor assembly, creating a compact unified component that reduces overall device size while maintaining acoustic performance through optimized internal geometry.
Solution Approach 2:
The patent utilizes the z-direction (thickness direction) to create resonance spaces. By designing resonance cavities that extend in the thickness direction of the display unit and speaker frame, the invention effectively increases the resonance volume without increasing the planar footprint, thus resolving the contradiction between compact size and adequate resonance space.
2Ease of manufacture
If multiple components are integrated into a single audio output module, then the number of parts is reduced and manufacturing is simplified, but the resonance space becomes insufficient, leading to inadequate sound quality
Solution Approach 1:
The integrated design consolidates multiple components into a single module that can be manufactured as one unit or pre-assembled assembly. The speaker frame, motor, and magnet are configured to work together in a unified structure, reducing the number of separate manufacturing steps and assembly operations while maintaining acoustic performance through carefully designed internal resonance cavities.
3Area of stationary object
If the audio output module components are integrated, then mounting space is reduced, but the resonance space for sound quality becomes insufficient
Solution Approach 1:
The patent creates resonance spaces that extend primarily in the z-direction (thickness direction) rather than requiring large planar areas. The resonance cavities are formed within the volume of the speaker frame and display unit structure, utilizing the third dimension to provide adequate resonance volume while maintaining a compact footprint suitable for mobile terminal integration.
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 solution reduces the mounting space required for audio output functions, simplifies the manufacturing process, and enhances sound quality by utilizing the display unit for sound transmission, resulting in improved audio output without increasing the device's size.
Implementation Method 1
a voice coil located around the motor, wherein the voice coil vibrates in directions of one surface and the other surface to generate a vibration of the diaphragm
Implementation Method 2
a motor coupled to the yoke and at least partially positioned inside the speaker frame... the motor includes a motor coil fixed to the motor frame, an elastic portion having one side coupled to the motor frame, and a motor magnet coupled to the other side of the elastic portion
Implementation Method 3
capable of strengthening a weak point of a conventional audio output module by utilizing not only a diaphragm of the audio output module, but also a display unit of the mobile terminal
Data Source
AI summary
A motor-integrated acoustic output unit, comprising: a speaker frame of which one surface and the other surface are open; a diaphragm covering an opening part of the one surface of the speaker frame and being coupled to the speaker frame; a yoke covering the other surface of the speaker frame; a motor unit which is coupled to the yoke and which has at least a portion positioned inside the speaker frame; a voice coil positioned on the circumference of the motor unit, vibrating in the directions of the one surface and the other surface, and causing the diaphragm to vibrate; and an outer magnet positioned outside the voice coil, wherein the motor unit comprises: a motor frame coupled to the yoke; a motor coil fixed to the motor frame; an elastic part of which one side is coupled to the motor frame; and a motor magnet coupled to the other side of the elastic part, implements speaker, receiver, and motor functions with one module so as to reduce a mounting space, thereby reducing the number of components such that a manufacturing process is simplified and manufacturing costs can be reduced.