Electric Shaver Hair Lifting Frames Between Outer Blades
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Solution Overview
Problem
Conventional electric shavers face difficulties in efficiently lifting body hair at small hair rising angles without damaging the skin, as they often have regions with high and low skin adhesion, leading to potential skin damage when hair lifting portions are provided in high adhesion areas.
Innovation Solution
The electric shaver design includes hair lifting frames positioned between the top portions of the first and second outer blades in the traveling direction, allowing efficient hair lifting while minimizing skin contact and preventing damage by avoiding hair lifting frames in high adhesion regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hair lifting portions are provided in regions with high skin adhesion, then body hair at small hair rising angles can be lifted efficiently, but the skin surface may be damaged
Solution Approach 1:
The patent applies local quality by providing hair lifting portions only in specific regions (regions with small skin adhesion) rather than uniformly across all outer blades. This allows the shaver to have different functional characteristics in different locations - hair lifting capability where skin adhesion is low, and no hair lifting portions where skin adhesion is high - thus resolving the contradiction between hair lifting efficiency and skin protection
Solution Approach 2:
The patent segments the outer blades into multiple regions based on skin adhesion characteristics. By dividing the blade surface into regions with high adhesion and regions with small adhesion, and selectively placing hair lifting portions only in the latter, the system achieves both effective hair lifting and skin protection
Data Source
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AI summary
Hair lifting frames 33 are provided in a range X between a top Y of a first outer blade 17 located on one side in the traveling direction and a top Y of a second outer blade 19 located on the other side in the traveling direction in the use of a shaver main body 3 (an electric shaver 1). Accordingly, the hair lifting frames 33 can efficiently lift body hair up, and at the same time, an influence (damage) on a skin surface 37 can be prevented.