Shaving Cap Annular Corrugations Reduce Pressure Peaks
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Solution Overview
Problem
Conventional shaving apparatus caps do not adequately address user comfort during shaving, as they often result in pressure peaks and discomfort due to their design, particularly when moving over the skin.
Innovation Solution
A cap with a skin-contacting surface featuring at least two annular corrugations, where the central surface of the outmost corrugation significantly deviates from an imaginary smooth plane, creating a drooping configuration that reduces pressure peaks and enhances comfort by providing a smoother skin contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cap has a conventional smooth or uniformly corrugated surface, then the structure is simple and easy to manufacture, but pressure peaks occur during shaving causing user discomfort
Solution Approach 1:
The cap surface is divided into multiple annular corrugations with different local geometries. Each corrugation has a specific profile (convex, concave, or flat) that creates localized pressure distribution characteristics. This local quality variation allows the cap to reduce pressure peaks at specific contact points while maintaining overall structural simplicity and manufacturability.
2Ease of operation
If the cap surface is made complex with multiple corrugation patterns, then pressure distribution is improved and user comfort increases, but manufacturing complexity and cost increase
Solution Approach 1:
The cap incorporates annular corrugations with specific curvature profiles (convex, concave, or flat sections) that optimize pressure distribution across the skin contact surface. These curved geometric features are designed to guide the cap's movement over skin contours, reducing friction and pressure peaks while remaining compatible with standard manufacturing processes for plastic injection molding or similar cap fabrication methods.
Data Source
AI summary
A cap for a shaving head of a shaving apparatus has a skin contacting surface including at least two annular corrugations. The shape of the skin contacting surface of the cap is adapted to realizing a high feeling of comfort for a user of the shaving apparatus. A factor contributing to the feeling of comfort is that an annular central surface of an outermost corrugation has an orientation that is out of line with an expected course of an imaginary smooth flowing plane following a central surface of an adjacent corrugation, where a drooping configuration of the central surface of the outermost corrugation with respect to the central surface of the adjacent corrugation is realized.