Micro Speaker Yoke Plate Stepped Structure for Backward Sound Emission
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Solution Overview
Problem
Conventional micro speakers in miniaturized electronic devices face performance degradation due to insufficient space for backward sound emission, leading to compromised sound quality and durability issues.
Innovation Solution
A micro speaker design featuring a stepped structure around the hole of the yoke plate to secure space for backward sound resonance and heat emission, enhancing sound output performance and device durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional micro speaker is used in a miniaturized electronic device, then the device size is reduced, but the backward sound emission space becomes insufficient
Solution Approach 1:
The patent introduces a stepped structure that creates vertical height differences on the yoke plate surface. This dimensional change from a flat 2D surface to a 3D stepped structure allows backward sound to be emitted through multiple height levels, effectively increasing the emission space without expanding the horizontal footprint of the device.
Solution Approach 2:
The yoke plate surface is segmented into multiple stepped levels with different heights. This segmentation creates distinct regions that guide and emit backward sound through various height zones, maximizing the utilization of limited space within the miniaturized device structure.
2Length of stationary object
If the electronic device is made thinner, then the device profile is improved, but the space for backward sound emission is compromised
Solution Approach 1:
By creating vertical stepped levels on the yoke plate, the patent transforms the limited horizontal space into a multi-level vertical structure. This allows the device to maintain a thin profile while providing sufficient backward sound emission space through the height variations of the stepped structure.
3Ease of manufacture
If conventional micro speaker design is used, then manufacturing is simple, but sound pressure and durability are reduced
Solution Approach 1:
The stepped structure is applied locally to specific regions of the yoke plate rather than requiring complete redesign of the entire speaker assembly. This localized modification maintains manufacturing simplicity while significantly improving sound pressure and durability through enhanced backward sound emission in the modified regions.
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 stepped structure improves sound pressure and durability by ensuring efficient backward sound emission and heat dissipation, maintaining sound quality in compact electronic devices.
Implementation Method 1
at least one coil coupled with the diaphragm, a magnet configured to interact with a magnetic field induced by the at least one coil
Implementation Method 2
An area, adjacent to the hole, of a lower surface of the yoke plate has a height difference relative to another area of the lower surface of the yoke plate
Data Source
AI summary
A micro speaker is provided. The micro speaker includes a diaphragm, at least one coil coupled with the diaphragm, a magnet configured to interact with a magnetic field induced by the at least one coil, and a yoke plate located on a bottom of the magnet to support the magnet and including a hole therein, top and bottom ends of the hole being opened. An area, adjacent to the hole, of a lower surface of the yoke plate has a height difference relative to another area of the lower surface of the yoke plate.