Compact Bidirectional Sound Production Apparatus for Portable Terminals
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Solution Overview
Problem
Existing sound production apparatuses capable of bidirectional sound production are typically large in size, making them difficult to apply widely, especially in narrow mounting spaces of portable terminals.
Innovation Solution
A sound production apparatus comprising a first vibration system, a second vibration system, and a magnetic circuit system, where the first vibration system includes a diaphragm and a voice coil, and the second vibration system includes a diaphragm with a reinforcement portion that extends and is fixed to the first diaphragm, allowing for bidirectional sound production with a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two sets of voice coil and magnetic circuit systems are employed to achieve bidirectional sound production, then bidirectional sound production capability is improved, but device size increases
Solution Approach 1:
The patent merges two independent vibration systems into a shared structure where a single voice coil and magnetic circuit system serves both diaphragms. The first and second diaphragms share common mounting structures including the reinforcement portion, extension portion, and magnetic circuit components, allowing bidirectional sound production without duplicating the entire electromechanical system.
Solution Approach 2:
The single voice coil and magnetic circuit system performs multiple functions by driving both the first diaphragm (for forward sound) and the second diaphragm (for backward sound). The reinforcement portion with extension portion acts as a universal mounting structure that enables both diaphragms to be driven by the same electromagnetic actuator, achieving multi-functionality with reduced component count.
2Volume of moving object
If a compact structure is adopted to reduce device size, then volume is reduced, but structural complexity increases
Solution Approach 1:
The patent segments the mounting structure into distinct functional portions: the reinforcement portion attached to the second diaphragm, the extension portion connecting to the first diaphragm, and the avoidance portion in the magnetic circuit system. This segmentation allows each component to be optimized independently while maintaining overall compactness, reducing the need for complex integrated designs.
Solution Approach 2:
The extension portion extends in a direction perpendicular to the plane of the second diaphragm, utilizing the vertical dimension to connect to the first diaphragm. This dimensional approach allows the compact structure to accommodate both diaphragms in a limited space without requiring complex lateral arrangements, simplifying the overall structural design.
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 apparatus achieves bidirectional sound production with a compact structure, facilitating its wide application in portable terminals by using a single voice coil and magnetic circuit system to drive both diaphragms simultaneously, thus occupying a small volume.
Implementation Method 1
a first vibration system, a second vibration system and a magnetic circuit system, wherein the first vibration system comprises a first diaphragm and a voice coil arranged on the side, facing the magnetic circuit system, of the first diaphragm
Implementation Method 2
the reinforcement portion is provided with an extension portion extending along a direction close to the first diaphragm, and a position, corresponding to the extension portion, in the magnetic circuit system is provided with an avoidance portion; and the extension portion is capable of passing through the avoidance portion, and is fixed to the first diaphragm
Data Source
AI summary
The present invention discloses a sound production apparatus, comprising a first vibration system, a second vibration system and a magnetic circuit system, wherein the first vibration system comprises a first diaphragm and a voice coil arranged on a side, facing the magnetic circuit system, of the first diaphragm; the second vibration system comprises a second diaphragm arranged opposite to the first diaphragm, and a middle position of the second diaphragm is combined with a reinforcement portion; the reinforcement portion is provided with an extension portion extending along a direction close to the first diaphragm, and a position, corresponding to the extension portion, in the magnetic circuit system is provided with an avoidance portion; and the extension portion is capable of passing through the avoidance portion, and is fixed to the first diaphragm. The sound production apparatus of the present invention is configured with two sets of vibration systems but only adopts one set of a voice coil and magnetic circuit system, so as to realize a structure for synchronized bidirectional sound production, occupying a small volume, facilitating its wide application to portable terminals.