Converging Hair Cutting Device Arms for Precision Eyelash Trimming
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Solution Overview
Problem
There is a need for a precise hair cutting device that can safely and accurately trim hairs in delicate and hard-to-access areas, such as eyelashes and eyebrow hairs, as existing solutions are inadequate for these applications.
Innovation Solution
A hair cutting device with a first arm and an opposed second arm, featuring a cutting surface and a cutting blade that converges to provide a sharp cutting edge, allowing for precise engagement and cutting of hairs in tight spaces, with the second arm's width being narrower than the first arm's width in the converging sections to facilitate effective cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional scissors or clippers are used to trim eyelashes and eyebrow hairs, then the device can reach the area, but it cannot provide precise control and safety for trimming delicate hairs
Solution Approach 1:
The device divides the cutting function into two separate arms (first arm with cutting surface and second arm with cutting blade) that can be independently positioned and controlled. This segmentation allows each arm to be optimized for its specific function and enables precise control over the cutting action, reducing the risk of injury while improving trimming precision for delicate hairs like eyelashes and eyebrows.
2Ease of manufacture
If the device structure is simplified for ease of manufacture, then manufacturing cost decreases, but the ability to precisely position and control the cutting elements is reduced
Solution Approach 1:
The device applies local quality by giving each arm specific geometric characteristics optimized for its function. The first arm has a cutting surface with specific orientation and the second arm has a cutting blade with complementary geometry. These localized geometric features are designed to work together to achieve precise positioning and controlled cutting, while the overall structure remains relatively simple for manufacturing.
3Productivity
If the cutting blade engages the cutting surface abruptly, then the cutting action is quick, but it causes sudden movement that reduces precision and increases safety risk
Solution Approach 1:
The device employs dynamics by designing the cutting blade and cutting surface to engage progressively rather than abruptly. The geometric relationship between the converging sections allows the cutting blade to gradually contact the cutting surface, creating a controlled, progressive cutting action. This dynamic engagement maintains cutting efficiency while improving precision and reducing safety risks associated with sudden movements.
Data Source
AI summary
A hair cutting device (10) comprises a first arm (12) having (i) a first arm proximal end (20), (ii) a first arm distal end (22), (iii) a first arm connected section (24), (iv) a first arm diverging section (26), (v) a first arm converging section (28), (vi) a cutting surface (52), and (vii) a first arm width (12W); and an opposed second arm (14) having (i) a second arm proximal end (38), (ii) a second arm distal end (40), (iii) a second arm connected section (42), (iv) a second arm diverging section (44), (v) a second arm converging section (46), (vi) a cutting blade (54), and (vii) a second arm width (14W). The second arm width (14W) is narrower than the first arm width (12W) through a substantial entirety of the second arm converging section (46) and the first arm converging section (28).