Arc-Shaped Blade Eyebrow Trimmer Head for Precision Shaping
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Solution Overview
Problem
Existing eyebrow trimmers, both rotary electric and hand-shaving types, face challenges in safety, ease of use, and efficiency due to straight blade designs that are difficult to control and prone to cutting the skin, with rotary trimmers experiencing poor hair feeding efficiency and straight razors lacking precision and safety.
Innovation Solution
A pen-shaped trimmer head with a cylindrical body featuring an arc-shaped blade that can extend and retract, having an arc-shaped cutting edge inclined relative to the axis, combined with a handle, allowing for precise control and safety during eyebrow trimming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a straight blade is used for eyebrow trimming, then the structure is simple, but the safety is poor and it is easy to cut the skin
Solution Approach 1:
The blade is designed with an arc-shaped structure instead of a straight blade. The arc-shaped blade edge follows the natural curvature of the eyebrow area, allowing it to conform to the skin contour and avoid cutting the skin while maintaining simplicity in the overall blade design.
2Manufacturing precision
If a wide and long blade is used, then the structure is simple, but the precision is poor and it is not easy to shape eyebrows
Solution Approach 1:
The arc-shaped blade design allows for precise contouring of eyebrows by following the natural curvature of the brow area. The curved edge provides better control and precision compared to a straight blade, enabling detailed shaping work.
3Manufacturing precision
If the blade is made very small, then the precision is improved, but the safety is poor as it is easy to insert into the skin
Solution Approach 1:
The arc-shaped blade with its curved edge distributes the contact area along the eyebrow contour, preventing concentrated pressure points that could penetrate the skin. The curvature naturally follows the skin surface, making it safer than a small sharp point while maintaining precision.
4Productivity
If a straight groove structure is used in the trimmer head cover, then the manufacturing is easier, but the hair feeding efficiency is poor
Solution Approach 1:
The trimmer head cover incorporates an arc-shaped groove structure that matches the curvature of the blade and eyebrow area. This curved groove design improves hair feeding efficiency by guiding hairs along the natural contour toward the blade, while remaining straightforward to manufacture through standard molding processes.
Data Source
AI summary
A trimmer head for pen-shaped eyebrow trimmer, including a cylindrical trimmer head body, the trimmer head body is provided with a blade, the trimmer head and handle can form an eyebrow trimmer with a pen-shaped structure. The blade is a curved arc-shaped structure, and blade edge at the upper end is arc-shaped; by placing the upper end of blade on upper end face of trimmer head body, the trimmer head can move perpendicular to the skin or inclined at a certain angle with the direction perpendicular to the skin when shaving, combined with the inclined setting of the blade relative to axis L of the trimmer head body to form an inclined cutting angle to ensure sharpness of cutting. To improve the flexibility and controllability of eyebrow trimming, the blade with arc-shaped structure can effectively control the shaving of concave and convex parts, as to accurately trim and shape eyebrows.