Earphone Speaker Unit with Yoke Pressure Equalization
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Solution Overview
Problem
Conventional earphones with speaker units and nozzles require large internal spaces for air pressure equalization, leading to increased size and complexity.
Innovation Solution
A speaker unit design featuring a frame with strategically positioned holes and a yoke that connects these holes, allowing for air pressure equalization and sound emission without additional structures, while maintaining a compact size by aligning speaker portions perpendicular to the nozzle direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional structures are added to implement air pressure equalization, then air pressure equalization function is improved, but the size of the earphone increases
Solution Approach 1:
The patent combines the air pressure equalization function with the existing speaker unit structure by integrating passages directly into the yoke component. The yoke serves dual purposes: as a magnetic circuit component and as a pressure equalization channel, eliminating the need for separate equalization structures and thereby reducing overall earphone size while maintaining the equalization function.
Solution Approach 2:
The yoke is designed to perform multiple functions simultaneously: it acts as a magnetic conductor for the speaker unit and as a passageway for air pressure equalization. This multi-functionality allows the earphone to achieve pressure equalization without adding dedicated equalization structures, thus avoiding size increase.
2Power
If speaker unit emits sound from both front and rear, then sound emission capability is improved, but the space requirement inside housing increases
Solution Approach 1:
The patent utilizes the vertical dimension by having the yoke extend in the front-to-rear direction with passages formed within it. This allows air pressure equalization to occur along the length of the yoke rather than requiring additional horizontal space, enabling compact housing design while maintaining dual-directional sound emission capability.
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 reduces the earphone's size while ensuring effective air pressure equalization and sound emission, allowing for efficient tuning of both high and low-frequency sounds without additional configurations.
Implementation Method 1
a coil fixed to the first diaphragm; a second coil fixed to the second diaphragm
Data Source
AI summary
A speaker unit for an earphone is provided. The speaker unit for an earphone includes a frame including a first hole in a front thereof and a second hole in a rear thereof; a yoke disposed on the frame and elongated along a front-to-rear direction; a first magnet disposed on one side of the yoke; a first plate disposed on one side of the first magnet; a first diaphragm disposed on one side of the first plate; a second magnet disposed on the other side of the yoke; a second plate disposed on the other side of the second magnet; and a second diaphragm disposed on the other side of the second plate, wherein the first magnet and the second magnet are together in contact with the yoke, and the yoke includes a first passage that connects the first hole and the second hole.