Portable Electroacoustic Device Frameless Vibration Coupling
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Solution Overview
Problem
The existing portable electroacoustic devices are limited in size due to their frame structure, which hinders the development of small form factor portable electronic devices, and there is a need for improved low frequency sound performance.
Innovation Solution
A portable electroacoustic device design that eliminates the frame by integrating a vibrating system and magnetic circuit system within a shell, using a coupling part made of soft silica gel or foam to enhance vibration transmission and reduce energy losses, allowing the device to generate low frequency sounds while minimizing thickness and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a frame structure is used in electroacoustic devices, then structural stability is improved, but device size increases and portability is reduced
Solution Approach 1:
The patent removes the frame structure from the electroacoustic device, extracting only the essential functional components (magnetic circuit system, vibrating system, and coupling part) to achieve compact size while maintaining stability through direct integration of these components
Solution Approach 2:
The patent merges the magnetic circuit system, vibrating system, and coupling part into an integrated assembly that is directly mounted on the external medium, eliminating the need for a separate frame structure and reducing overall device volume
2Loss of energy
If a coupling part made of soft material is used, then vibration transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies soft material properties locally at the coupling part where vibration transmission occurs, while keeping other components simple and rigid, thus improving vibration transmission efficiency without significantly increasing overall device complexity
Solution Approach 2:
The coupling part is made of soft silica gel or foam material that provides effective vibration transmission and energy loss reduction, creating a composite structure that balances performance and simplicity
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 enables a compact, cost-effective, and efficient low frequency sound production in portable devices, simplifying the structure and reducing installation space, suitable for applications in devices like cell phones and laptops.
Implementation Method 1
a coupling part (214) sandwiched between the vibrating unit (2) and the external medium (3)... the vibrating plate (211) engages with the desk to form a coupling and the voice coil (212) is electrified and drives the vibrating plate (211) to vibrate which produces resonance with the desk
Implementation Method 2
the vibrating plate (211) engages with the desk to form a coupling and the voice coil (212) is electrified and drives the vibrating plate (211) to vibrate which produces resonance with the desk and then generates low frequency sound
Implementation Method 3
The magnetic circuit system (22) comprises a yoke (223), a main magnet (221) accommodated in the yoke (223), and an auxiliary magnet (222) surrounding the main magnet (221)... one end of the voice coil (212) is positioned in the magnetic gap and driven by the magnetic circuit system (22)
Data Source
AI summary
Disclosed is a portable electroacoustic device. The device includes a shell having a receiving space; a fixing part received in the receiving part and connected with the shell, and a vibrating unit positioned in the receiving space. The vibrating unit includes a vibrating system and a magnetic circuit system fixed with the fixing part for driving the vibrating system. The magnetic circuit system has a magnetic gap. The vibrating system includes a vibrating plate for driving an external medium to generate resonate, and a voice coil inserted in the magnetic gap for driving the vibrating plate. The shell includes a lower plate having a through hole, the vibrating plate connects with the lower plate and is accommodated in the through hole.