Interdental Cleaning Tool Shaft Composite Material Design
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Solution Overview
Problem
Conventional interdental cleaning tools with composite materials face fractures under bending loads due to insufficient flexibility and toughness, despite enhanced buckling strength from reinforcement materials.
Innovation Solution
A composite material comprising a synthetic resin, a reinforcement material, and a low-hardness resin with a lower hardness than the synthetic resin is used to form the shaft, enhancing both buckling strength and flexibility, preventing fractures under bending loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforcement material is added to synthetic resin to enhance buckling strength, then the buckling load of the shaft is greatly enhanced, but the shaft becomes relatively likely to be fractured when bending load acts on it
Solution Approach 1:
The patent uses a composite material consisting of synthetic resin and elastomer particles dispersed within it. This composite structure combines the high strength and stiffness of the synthetic resin with the flexibility and toughness of the elastomer particles, achieving both high buckling load and fracture resistance simultaneously. The elastomer particles act as stress concentrators that prevent crack propagation, while the synthetic resin matrix provides the structural framework for buckling resistance.
Solution Approach 2:
The invention applies local quality by distributing elastomer particles throughout the synthetic resin matrix in a non-uniform manner. The elastomer particles are dispersed to create localized regions of enhanced toughness and flexibility within the overall rigid structure, allowing the shaft to withstand bending loads without fracture while maintaining high buckling strength in the axial direction.
2Strength
If reinforcement material is added to synthetic resin, then the buckling strength is enhanced, but the flexibility of the shaft is reduced
Solution Approach 1:
The composite material combines synthetic resin providing structural integrity and buckling strength with elastomer particles providing flexibility and shock absorption. This dual-phase composite enables the shaft to maintain high buckling strength while achieving the flexibility needed for ease of operation during interdental cleaning.
Solution Approach 2:
The invention changes the material parameters by selecting specific ratios of synthetic resin to elastomer particles, and by controlling the size and distribution of elastomer particles. This parameter optimization allows the shaft to achieve the desired balance between buckling strength and flexibility for effective interdental cleaning operation.
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 interdental cleaning tool maintains buckling strength while securing flexibility, ensuring effective cleaning without shaft fracture, as demonstrated by improved flexibility and buckling load tests.
Implementation Method 1
a low-hardness resin having a lower hardness than a hardness of the synthetic resin
Data Source
AI summary
An interdental cleaning tool (1) comprises a base (10) having a shaft (20) that has a shape to be inserted into an interdental space, wherein the base (10) is formed of a composite material comprising a synthetic resin, a reinforcement material and a low-hardness resin having a lower hardness than the hardness of the synthetic resin.