Random-Polymer Rubber Diaphragm for Low-Frequency THD Reduction
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Solution Overview
Problem
Existing rubber diaphragms in sound devices struggle to effectively reduce distortion (THD) in the low-frequency band while maintaining performance and keeping production costs low.
Innovation Solution
A rubber diaphragm incorporating a distortion improving agent, a random linear polymer with specific monomer components and chemical reaction crosslinking points, is prepared via a one-step method, enhancing distortion performance without increasing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional rubber diaphragm materials are used, then production cost is kept low, but distortion (THD) in the low-frequency band cannot be effectively reduced
Solution Approach 1:
The patent changes the chemical composition parameters of the rubber diaphragm by incorporating specific polymer additives (polyester polyol, polyether polyol, or poly silicone oxide) with controlled molecular weights and ratios. These parameter changes in material composition enable distortion reduction while maintaining cost-effectiveness through standardized polymer materials
Solution Approach 2:
The patent creates a composite rubber diaphragm material combining conventional rubber with specific polymer additives (polyester polyol, polyether polyol, poly silicone oxide) in defined proportions. This composite approach leverages the beneficial properties of each component to reduce distortion while controlling production costs through the use of relatively simple polymer materials
2Object-affected harmful factors
If complex multi-step synthesis methods are used to improve distortion performance, then distortion characteristics improve, but preparation complexity and production cost increase
Solution Approach 1:
The patent segments the distortion improvement function into separate polymer additive components (polyester polyol, polyether polyol, poly silicone oxide) that can be independently selected and combined. This segmentation allows for simplified preparation by choosing pre-synthesized polymer materials rather than creating complex polymers through multi-step processes
Solution Approach 2:
The patent uses readily available polymer additives (polyester polyol, polyether polyol, poly silicone oxide) that can be easily procured and incorporated into the rubber diaphragm formulation. These are simple, commercially available materials rather than complex custom-synthesized polymers, enabling cost-effective distortion reduction
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 rubber diaphragm significantly reduces THD in sound devices, improving acoustic quality without affecting original performance or increasing production costs, and is applicable in various electronic devices.
Implementation Method 1
the distortion improving agent is a random linear polymer with more than two monomer components randomly arranged on a main chain
Implementation Method 2
an end group and/or a side group, and a side chain of the distortion improving agent include special chemical reaction crosslinking point
Data Source
AI summary
Rubber diaphragm, sound device and application thereof are provided; rubber diaphragm includes distortion improving agent with mass percentage of 0.5-50%; distortion improving agent is random linear polymer with more than two monomer components randomly arranged on main chain, and distortion performance is synergistically regulated by monomer components; end group and/or side group and side chain of distortion improving agent includes special chemical reaction crosslinking points with mass percentage of 0.01-20, and number average molecular weight of distortion improving agent is 500-1200000; and distortion improving agent or main chain thereof is prepared by one-step method. Rubber diaphragm includes distortion improving agent, which is random linear polymer that components are randomly arranged on main chain. Sound device of rubber diaphragm is used to reduce distortion of low-frequency band obviously while maintaining good frequency response characteristics; and preparation method of distortion improving agent is simple, low in cost and has wide application.