Electric Hair-Like Body Cutter With Reversible Inner-Blade Modes
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Solution Overview
Problem
Existing electric cutters for hair-like bodies, such as electric shavers and lint removers, often compromise between cutting quality and minimizing damage to the base portion, such as skin or fabric, with existing solutions failing to provide satisfactory results in both modes.
Innovation Solution
An electric cutter with an inner blade that can rotate in both forward and rearward directions, featuring different blade edges and rotation speeds for modes that prioritize either cutting quality or minimizing base portion damage, utilizing specific rake angles and rotation speed adjustments to optimize performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the inner blade is rotated in the forward rotation direction with a smaller rake angle to improve cutting quality, then the cutting quality is improved, but the damage to the base portion increases
Solution Approach 1:
The inner blade is configured to rotate in both forward and rearward directions, allowing dynamic switching between cutting modes. The rotation direction can be changed based on the desired outcome: forward rotation for superior cutting quality or rearward rotation for reduced base portion damage, while maintaining effective cutting performance in both modes
Solution Approach 2:
The patent utilizes different rake angles on opposite sides of the inner blade. The first blade edge has a smaller rake angle optimized for cutting quality, while the second blade edge has a larger rake angle optimized for reducing base portion damage. By changing the rotation direction, the appropriate blade edge is presented to the hair-like body, effectively changing the cutting parameter
2Manufacturing precision
If the rotation speed of the inner blade is increased to improve cutting quality, then the cutting quality is improved, but the damage to the base portion increases
Solution Approach 1:
The system dynamically adjusts rotation speed based on the desired cutting mode. Higher rotation speeds are employed during forward rotation to maximize cutting quality, while lower rotation speeds are used during rearward rotation to minimize base portion damage. This dynamic speed adjustment allows optimization of both contradictory requirements
Data Source
Figure 1
Figure 2~3
Figure 4A~4B
AI summary
An electric cutter (1) of a hair-like body according to the present invention includes an inner blade (42) that is rotatable in a forward/rearward direction. The inner blade (42) has a plurality of small blades (42A) in which a first blade edge (42a) is formed on a forward rotation side and a second blade edge (42b) is formed on a rearward rotation side. The electric cutter (1) further includes switching means for switching rotation directions of the inner blade (42) to switch between a first mode in which a hair-like body (X) is cut by the first blade edge (42a) and a second mode in which the hair-like body (X) is cut by the second blade edge (42b). A rotation speed of the inner blade (42) in the second mode is set to be higher than a rotation speed of the inner blade (42) in the first mode.