Slit Blade Block Comb with Multi-Shape Protrusions
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Solution Overview
Problem
Conventional slit blade blocks face challenges in efficiently scooping long facial hair due to single-shaped protruding portions on the comb, leading to incomplete shaving and increased skin irritation when trying to improve hair introducibility.
Innovation Solution
A slit blade block design featuring a comb with multiple types of protruding portions of different shapes and dimensions, which are strategically arranged to enhance hair scooping and reduce skin irritation, while maintaining the structural integrity of the outer blade.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the interval between outer blade pieces of the slit outer blade is increased to improve the introducibility of hair, then the ease of taking in hair is improved, but the irritation to the skin is increased
Solution Approach 1:
The comb is introduced as an intermediary component between the skin and the slit outer blade. The comb's protruding portions lift and guide facial hair into the blade gaps, enabling effective shaving with larger intervals between outer blade pieces without direct skin contact issues. This mediator resolves the contradiction by decoupling the hair-cutting function from skin contact.
2Ease of operation
If the width of a crosspiece between the outer blade pieces is made thin to improve the introducibility of hair, then the ease of taking in hair is improved, but the strength of the slit outer blade is deteriorated
Solution Approach 1:
The comb acts as a mediator that compensates for the weakened structure. By using a thinner crosspiece to improve hair introducibility, the comb's protruding portions provide the additional support and guidance needed, allowing the crosspiece to be thinner without compromising overall system performance. The comb compensates for the structural weakness.
3Device complexity
If the protruding portions on the comb have a single shape, then the structure is simple, but not all the long facial hair can be introduced into the slit blade block
Solution Approach 1:
The comb incorporates protruding portions with different shapes (first, second, and third shapes) at different locations to match different hair characteristics. This local differentiation allows the comb to effectively guide various types of facial hair into the blade, improving shaving completeness without excessive complexity.
Solution Approach 2:
The comb's protruding portions are segmented into multiple shape types rather than using a uniform design. This segmentation allows each portion to be optimized for specific hair types or locations, enabling more comprehensive hair capture and guidance into the blade block.
Data Source
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AI summary
Slit blade block (30) of an electric shaver of the present disclosure includes a slit outer blade having a plurality of outer blade pieces, a slit inner blade having a plurality of inner blade pieces, and comb (72) provided outside the slit outer blade. Comb (72) has a plurality of protruding portions (72B) protruding in a direction away from the slit outer blade. The plurality of protruding portions (72B) includes a plurality of types of protruding portions (72B) having different shapes. The present disclosure can provide a slit blade block having a comb that scoops lying long facial hair more easily, and an electric shaver provided with the slit blade block.