Integrated Ceramic Razor Blade with Horizontal Contact Geometry
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Solution Overview
Problem
Conventional razor blades cause skin damage due to diagonal linear contact and inconsistent assembly, leading to cuts and bacterial growth, and are prone to oxidation and rust, requiring frequent replacement.
Innovation Solution
An integrated multiple razor blade design featuring a frame portion with separated intervals and integrally formed razor blades, including main and precise blades with angled and flat contact portions, made of ceramic material to prevent skin damage and corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If razor blades are individually manufactured and assembled, then manufacturing flexibility is improved, but assembly precision and blade interval consistency deteriorate
Solution Approach 1:
The patent merges multiple razor blades and the frame into a single integrally formed unit. The frame portion and multiple blade portions are formed as one piece through injection molding, eliminating separate assembly steps. This ensures consistent blade intervals and heights while maintaining manufacturing efficiency through single-step production.
2Area of stationary object
If razor blade end portions are designed for linear contact with skin, then shaving coverage is improved, but skin damage risk increases
Solution Approach 1:
The patent applies curvature to the blade end portions by designing rounded contact surfaces instead of sharp linear edges. The first, second, and third face contact portions are formed with curved geometries that distribute pressure and guide the blade to contact skin horizontally, reducing cutting risks while maintaining effective shaving coverage.
3Strength
If steel razor blades are used, then blade strength is improved, but oxidation resistance and corrosion resistance deteriorate
Solution Approach 1:
The patent changes the material parameter from steel to ceramic. Ceramic materials provide comparable or superior strength while offering inherent resistance to oxidation and corrosion. This material substitution eliminates rust issues and reduces the need for frequent blade replacement while maintaining cutting performance.
4Device complexity
If multiple razor blades are assembled separately, then device complexity is reduced, but blade height consistency and shaving performance deteriorate
Solution Approach 1:
The patent combines multiple blades and the frame into a single integrally formed structure. Injection molding produces the frame portion and multiple blade portions as one piece, ensuring uniform blade heights and precise interval spacing. This eliminates assembly variability while keeping the device structure simple and manufacturable.
Data Source
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AI summary
The present invention relates to an integrated multiple razor blade capable of effectively reducing skin damage caused by the blade, and a manufacturing method thereof. The integrated multiple razor blade according to an embodiment of the invention includes a frame portion and a razor blade portion. Herein, the frame portion has a predetermined length, and is formed to be separated at predetermined intervals along one direction. The razor blade portion is formed integrally with the frame portion, and has a plurality of razor blades formed perpendicularly to the frame portion.