Eyelash Perm Rod with Segmented Curvature for Variable Curl Shapes
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Solution Overview
Problem
Existing methods for curling eyelashes, such as using an eyelash curler or artificial eyelashes, are either temporary, inconvenient, or expensive, and there is a need for a more effective and long-lasting solution for permanently curling eyelashes.
Innovation Solution
A rod for perming eyelashes is designed with a plate-shaped base and guide convex portions in a comb pattern, allowing for the grouping and curling of multiple eyelashes at equal intervals and enabling the selection of different curl angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single cylindrical rod is used for perming eyelashes, then the structure is simple, but only a single type of curled shape can be made
Solution Approach 1:
The rod is divided into multiple guide convex portions (first, second, third guide convex portions) with different curvature radii arranged along the longitudinal direction. Each guide convex portion corresponds to a different curled shape, allowing users to select different curling effects by positioning eyelashes at different locations on the rod.
Solution Approach 2:
Different sections of the rod have different local properties - specifically, different curvature radii at different positions. The first guide convex portion has a first curvature radius, the second has a second curvature radius, and the third has a third curvature radius, creating locally differentiated curling capabilities within a single rod structure.
2Adaptability or versatility
If multiple rods with different sizes are used to provide different curled shapes, then curling shape variety is achieved, but device complexity and number of components increase
Solution Approach 1:
Multiple rods with different curvature radii are merged into a single rod structure. The first, second, and third guide convex portions with different curvature radii are integrated along the longitudinal direction of one rod, allowing users to access multiple curling shapes without needing multiple separate rods.
Solution Approach 2:
The single rod is designed to perform multiple functions by incorporating guide convex portions with different curvature radii. This multi-functional rod can create different curled shapes (first curled shape, second curled shape, third curled shape) depending on which guide convex portion is used, replacing the need for multiple specialized rods.
3Manufacturing precision
If eyelashes are curled without grouping, then the process is simple, but adjacent eyelashes are not curled at equal intervals reducing aesthetic effect
Solution Approach 1:
The rod surface is segmented into multiple guide convex portions with preset intervals between them. This segmentation provides natural spacing guides that help users position and group adjacent eyelashes at equal intervals, ensuring uniform curling spacing without requiring complex measurement or positioning mechanisms.
Data Source
AI summary
The present device provides a rod for perming eyelashes, the rod including a base formed in a plate shape having a length corresponding to a width of an eye, and a width corresponding to a length of an eyelash, the base having an upper surface formed curvedly, and a plurality of guide convex portions each formed in a rod shape perpendicular to a longitudinal direction and disposed in parallel on the upper surface of the base so as to be spaced apart from one another at preset intervals, in which the base is formed such that a cross-section perpendicular to the longitudinal direction has an semi-elliptical shape, and one side horizontal surface and the other side horizontal surface have different curvatures.