Panel Speaker Diaphragm with Reinforcement for Low F0
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Solution Overview
Problem
Traditional panel speakers with high F0 and prone to deformation pose challenges for consistent sound quality and production in active noise reduction Bluetooth headphones.
Innovation Solution
A vibration system with a diaphragm body comprising laminated vocalization films, reinforcement structures, and a steel sheet to enhance rigidity and strength, along with a guide tube structure to reduce F0 and improve low-frequency energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If traditional panel speakers are used, then large effective vibration area and wide frequency response range are achieved, but diaphragm deformation and high F0 occur resulting in poor product consistency
Solution Approach 1:
The patent applies local quality by differentiating the diaphragm structure into two distinct zones: the vocalization area maintains film-only construction for optimal vibration and sound quality, while other positions incorporate solid members (steel sheets) and reinforcement structures to prevent deformation and reduce F0. This localized differentiation allows each area to serve its specific function without compromising overall product consistency.
Solution Approach 2:
The patent employs composite materials by combining different materials in the diaphragm structure: vocalization films (for vibration), solid members such as steel sheets (for strength and F0 reduction), and reinforcement structures. This composite approach integrates the advantages of each material - the flexibility and acoustic properties of films with the rigidity and stability of solid members - to simultaneously achieve large effective vibration area and high product consistency.
2Speed
If traditional panel speakers are used, then fast transient response is achieved, but diaphragm deformation occurs leading to sound distortion
Solution Approach 1:
The patent applies local quality by differentiating the diaphragm structure into two distinct zones: the vocalization area maintains film-only construction for optimal vibration and sound quality, while other positions incorporate solid members (steel sheets) and reinforcement structures to prevent deformation and reduce F0. This localized differentiation allows each area to serve its specific function without compromising overall product consistency.
Solution Approach 2:
The patent introduces curvature by designing the diaphragm with an arc-shaped cross-section rather than a completely flat structure. This arc-shaped design provides structural support to maintain diaphragm flatness in the vocalization area while preventing deformation, thereby reducing sound distortion and improving transient response without sacrificing acoustic performance.
3Manufacturing precision
If diaphragm strength is increased to prevent deformation, then product consistency improves, but F0 increases and low-frequency energy decreases
Solution Approach 1:
The patent applies local quality by differentiating the diaphragm structure into two distinct zones: the vocalization area maintains film-only construction for optimal vibration and sound quality, while other positions incorporate solid members (steel sheets) and reinforcement structures to prevent deformation and reduce F0. This localized differentiation allows each area to serve its specific function without compromising overall product consistency.
Solution Approach 2:
The patent transitions from a two-dimensional flat diaphragm to a three-dimensional structure by incorporating solid members and reinforcement structures that extend in multiple dimensions. This dimensional change provides structural support and F0 reduction without significantly increasing the surface area or mass of the vocalization films, thereby maintaining low-frequency response while improving product consistency.
4Stability of the object's composition
If vocalization film thickness is increased to prevent wrinkling, then diaphragm stability improves, but F0 increases and compliance decreases
Solution Approach 1:
The patent applies local quality by differentiating the diaphragm structure into two distinct zones: the vocalization area maintains film-only construction for optimal vibration and sound quality, while other positions incorporate solid members (steel sheets) and reinforcement structures to prevent deformation and reduce F0. This localized differentiation allows each area to serve its specific function without compromising overall product consistency.
Solution Approach 2:
The patent introduces curvature by designing the diaphragm with an arc-shaped cross-section rather than a completely flat structure. This arc-shaped design provides structural support to maintain diaphragm flatness in the vocalization area while preventing deformation, thereby reducing sound distortion and improving transient response without sacrificing acoustic performance.
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 effectively prevents diaphragm wrinkling, reduces distortion, and enhances product consistency and production yield while lowering the resonant frequency, thereby improving sound quality and energy response in active noise reduction earphones.
Implementation Method 1
a reinforcement structure provided at the vocalization area of the vocalization film to make the vocalization film remain flat at the vocalization area
Implementation Method 2
a solid member provided at other positions of the vocalization film except the vocalization area to increase strength of the diaphragm body
Implementation Method 3
a plurality of vocalization films are laminated in a thickness direction, and the plurality of vocalization films include a first film and at least one second film provided on each side of the first film
Implementation Method 4
two adjacent vocalization films are bonded and fixed through damping glue, and the vocalization film and the reinforcement structure are bonded and fixed through damping glue
Data Source
AI summary
Disclosed are a vibration system, a panel speaker and an active noise reduction wearable electronic device. The vibration system includes a diaphragm body. The diaphragm body includes at least one vocalization film having a vocalization area, a reinforcement structure and a solid member. The vocalization film realizes vibration vocalization function. The reinforcement structure is provided at the vocalization area of the vocalization film to make the vocalization film remain flat at the vocalization area. The solid member is provided at other positions of the vocalization film except the vocalization area to increase strength of the diaphragm body.