Integral Shaving Razor Blade with Bent Support
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Solution Overview
Problem
Conventional shaving razors require additional bent metal supports for blade stability, increasing component count and costs, while existing razor blades lack sufficient rigidity and ductility for optimal performance.
Innovation Solution
A cutting member for shaving razors featuring an elongated blade portion, an integral base portion, and a bent portion with reduced thickness, formed from high-carbon steel with specific alloy composition, providing enhanced rigidity and ductility, allowing for direct affixation to the razor cartridge without additional supports and enabling efficient cutting edge performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional razor blades are made thin for flexibility, then ease of operation is improved, but rigidity and stability deteriorate, requiring additional bent metal supports
Solution Approach 1:
The patent changes the material parameters by using a specific steel alloy composition (0.35-0.43% carbon, 0.90-1.35% molybdenum, 0.40-0.90% manganese, 13-14% chromium) and applies heat treatment to achieve optimal balance between flexibility and rigidity in a single-piece blade design
Solution Approach 2:
The patent merges the blade and support functions into a single integral piece of metal, eliminating the need for separate bent metal supports by creating a monolithic structure that provides both cutting functionality and structural stability
2Strength
If conventional razor blades use additional bent metal supports for stability, then rigidity is improved, but device complexity and manufacturing costs increase
Solution Approach 1:
The patent combines multiple functions (blade, support, mounting structure) into a single integral piece of metal, reducing component count and simplifying manufacturing while maintaining structural stability
Solution Approach 2:
The single-piece blade structure performs multiple functions simultaneously: it provides the cutting edge, structural support, rigidity, and mounting capability, eliminating the need for separate specialized components
3Strength
If conventional razor blades are made with high carbon content for hardness, then cutting edge performance is improved, but ductility and resistance to fracturing deteriorate
Solution Approach 1:
The patent optimizes the material parameters by specifying a precise alloy composition (0.35-0.43% carbon, 0.90-1.35% molybdenum, 0.40-0.90% manganese, 13-14% chromium) and applying heat treatment to achieve the desired balance between hardness and ductility
Solution Approach 2:
The patent uses a composite alloy material combining multiple elements (carbon, molybdenum, manganese, chromium, silicon) in specific proportions to achieve superior mechanical properties that balance hardness for cutting with ductility for fracture resistance
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 cutting member offers improved rigidity and comfort during use, reduces component complexity and costs, and maintains the ability to cut hair effectively without fracturing, through its unique structural design and material composition.
Implementation Method 1
The hardening operation utilizes a high temperature furnace, where the metal may be exposed to temperatures greater than 1145° C. for up to 18 seconds, followed by quenching
Implementation Method 2
a bent portion, intermediate the blade portion and the base portion
Data Source
AI summary
A cutting member for a shaving razor includes an elongated blade portion that tapers to a cutting edge, an elongated base portion that is integral with the blade portion, and a bent portion, intermediate the blade portion and the base portion. In some implementations, at least part of the cutting member has a thickness of at least about 0.005 inch (0.127 millimeter).