Slit Blade Block Comb Teeth Projections for Electric Razor Whisker Lifting
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Solution Overview
Problem
Conventional slit blade blocks in electric razors have difficulty lifting and shortening long whiskers due to the distance between the comb teeth and the skin, resulting in incomplete hair cutting.
Innovation Solution
A slit blade block design with comb teeth that have projections with peaks closer to the skin, allowing the comb teeth to effectively lift and cut long whiskers, where the outer blade pieces and inner blade pieces are aligned to facilitate hair cutting, and the comb component is designed to guide hair into the slit outer blade for efficient cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the comb teeth are positioned at a relatively large distance from the skin, then the structure maintains a comfortable skin tactile feel, but the comb teeth cannot effectively lift up long whiskers lying on the skin
Solution Approach 1:
The comb tooth is given a projection that extends in the depth direction (toward the skin), creating a three-dimensional structure. The peak of this projection reaches close to the skin surface while the base remains positioned to maintain tactile comfort. This dimensional extension allows the comb tooth to perform both functions: maintaining comfortable distance from skin while still being able to lift long whiskers effectively.
2Productivity
If the peaks of the comb teeth are located close to the skin, then the comb teeth can lift up long whiskers effectively, but the structure may compromise skin tactile comfort
Solution Approach 1:
The comb tooth structure is segmented into two functional parts: the main body that maintains distance from the skin for tactile comfort, and the projection with peak that extends toward the skin for effective hair lifting. This segmentation allows each part to fulfill its specific function without compromising the other.
3Productivity
If the width of comb teeth is increased to cover more area, then more hair can be processed, but the comb teeth may interfere with the outer blade pieces
Solution Approach 1:
The comb tooth has non-uniform width distribution: it is narrower at the base (adjacent to outer blade pieces) to avoid interference, and wider at the peak region to increase hair processing capacity. This local variation in width allows the comb tooth to maximize its functional area while maintaining proper clearance from the blade pieces.
Data Source
AI summary
This slit blade block includes multiple comb teeth adjacent to multiple outer blade pieces. Each comb tooth has a leading end surface, and a protruding part protruding in a direction away from the outer blade pieces. The protruding parts include an apical part that is the outermost end in said direction away from the outer blade pieces. The leading end surfaces of the protruding parts are positioned between the leading end surfaces and the base end surfaces of the adjacent outer blade pieces. Length L1 in the height direction, defined by the apical part of the protruding parts and the leading end surfaces of the protruding parts, is less than or equal to thickness L2 of the outer blade pieces, defined by the leading end surface and the base end surface of the outer blade pieces.