Vibrating Member With Through Holes For Air Pressure Balance
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Solution Overview
Problem
Micro speakers face challenges in balancing air pressure within the cavity during diaphragm vibration, affecting their performance.
Innovation Solution
Incorporating an elastic member with through holes between the diaphragm and voice coil to facilitate air pressure balance by allowing air compression and leakage, ensuring consistent sound production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a micro speaker uses a sealed cavity structure, then the device complexity is reduced and manufacturing is easier, but the air pressure cannot be balanced during diaphragm vibration leading to poor performance
Solution Approach 1:
The patent introduces a porous elastic member with through-holes that allows air to pass through while maintaining structural integrity. This porous structure enables air pressure balancing during diaphragm vibration without requiring complex valve mechanisms or additional moving parts, thus improving performance while keeping the device relatively simple to manufacture.
Solution Approach 2:
The patent changes the physical state of the elastic member by introducing through-holes, transforming it from a completely sealed structure to a permeable one. This parameter change allows air to flow through the elastic member during vibration cycles, balancing pressure differences and improving sound quality without significantly increasing manufacturing complexity.
2Reliability
If through holes are added to the elastic member, then air pressure balance is improved, but the device complexity increases
Solution Approach 1:
The patent merges the function of air pressure balancing with the existing elastic member structure. By integrating through-holes directly into the elastic member, the patent combines the sealing function and the pressure balancing function into a single component, avoiding the need for separate valves or channels and thus minimizing the increase in device complexity.
Solution Approach 2:
The elastic member serves multiple functions: it provides structural support, seals the cavity, and enables air pressure balancing through its through-holes. This multi-functionality reduces the need for additional dedicated components for pressure balancing, thereby limiting the increase in device complexity while improving performance.
3Reliability
If the elastic member is made more flexible to allow air compression and leakage, then air pressure balance is improved, but the strength of the elastic member decreases
Solution Approach 1:
The patent uses a porous elastic member where the through-holes are distributed throughout the material structure. This porous configuration allows air to pass through and balance pressure while the overall material retains sufficient strength and elasticity for its mechanical function, as the through-holes do not compromise the structural integrity of the elastic member.
Solution Approach 2:
The elastic member can be constructed from composite materials or specially engineered polymers that provide both flexibility for pressure balancing and sufficient strength for mechanical support. The composite structure allows the material to exhibit both compliant and strong characteristics simultaneously.
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 solution enhances the performance of micro speakers by maintaining balanced air pressure, thereby improving sound quality and reliability.
Implementation Method 1
When alternating currents go through the voice coil, the magnet will drive the voice coil to vibrate
Implementation Method 2
the magnet will drive the voice coil to vibrate and the diaphragm will also vibrate with the voice coil accordingly
Implementation Method 3
When the diaphragm vibrates, the air below the diaphragm will be compressed and then leaks outside via the through hole
Implementation Method 4
balances the air pressures between the air below the diaphragm and the air out of the diaphragm
Implementation Method 5
the diaphragm will also vibrate with the voice coil accordingly, which converts the currents into sound waves
Implementation Method 6
Sound which can be heard by a person's auditory sense is transmitted in the form of waves
Data Source
AI summary
An electroacoustic transducer includes a frame defining a hollow space, and an elastic member mounted on the frame. The elastic member includes a circular plane lamina and a plurality of elastic arms extending outwardly from a circumference of the circular plane lamina. A diaphragm includes a vibrating film mounted with the circular plane lamina, and an edge damper integrally formed with an outer periphery of the vibrating film. A voice coil is attached below the vibrating film and electrically connected to the circular plane lamina. At least two through holes are formed between an outer periphery of the circular plane lamina and an inner side of the voice coil for balancing the air pressure of the air below the diaphragm.