Flexible Cutting Blade Recessed Guard for Dry Shaving
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Solution Overview
Problem
Conventional safety razors require shaving cream for dry shaving, leading to issues like razor burn and difficulty in accessing hard-to-reach areas without assistance, and they often have rigid cutting blades that can cause accidental cutting or nicking.
Innovation Solution
A safety razor design with a cutting blade that is recessed within a deep void and supported by an inner guard, allowing for flexibility and reduced exposure, enabling dry shaving without lubricant and minimizing friction for a safer, closer shave.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the cutting blade is rigidly anchored in place, then the shaving precision and closeness are improved, but the risk of accidental cutting and nicking increases
Solution Approach 1:
The cutting blade is made flexible rather than rigid, allowing it to dynamically adapt to skin contours. The blade can flex and bend to follow the curvature of the skin surface, maintaining consistent contact and cutting precision while reducing the risk of accidental nicking on uneven surfaces.
Solution Approach 2:
The rigidity parameter of the cutting blade is changed to flexibility. By transforming the blade from a rigid structure to a flexible one, the system achieves both close shaving precision and safety by allowing the blade to conform to skin variations without causing accidental cuts.
2Manufacturing precision
If the cutting blade is exposed to cut hair as close as possible to the skin, then the shaving closeness is improved, but the need for shaving cream as lubricant increases
Solution Approach 1:
The flexible cutting blade automatically conforms to the skin surface contours through its own flexibility, eliminating the need for external lubricants like shaving cream. The blade's adaptive nature provides natural protection and smooth gliding without requiring additional substances.
3Adaptability or versatility
If the safety razor housing adjusts to contour challenging surfaces, then the adaptability is improved, but the cutting blade exposure increases
Solution Approach 1:
Instead of adjusting the housing to contour surfaces, the cutting blade itself is made dynamic and flexible to adapt to skin contours. This approach provides surface contouring capability while maintaining controlled blade exposure, as the flexible blade can conform without requiring the housing to extend or expose the blade further.
Data Source
AI summary
A safety razor removes hair from skin using the cutting blade comprising a sharp edge along an elongated side of a planar surface. An outer comb has a row of outer teeth running along the planar surface on an outside of the cutting blade, each outer tooth is substantially perpendicular to the sharp edge and spaced with a gap between the row of the outer teeth and the planar surface of the cutting blade. Ends of the row of outer teeth comprise outer teeth tips. An inner guard runs along the planar surface on an inside of the cutting blade. The sharp edge of cutting blade is recessed up to a skin surface contour, the skin surface contour defined by the outer teeth tips and an edge of the inner guard. The sharp edge of cutting blade longitudinally bends to cause further recess relative to the skin surface contour.