Oval Cosmetic Brush with Segmented Bristles for Streak-Free Application
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Solution Overview
Problem
Conventional brushes fail to efficiently apply cosmetic formulas to both large and small facial areas simultaneously, often resulting in uneven make-up finishes with streaks.
Innovation Solution
A brush with a base and a bundle of bristles forming an oval virtual plane, allowing for both wide and narrow applications by utilizing end regions for small areas and central regions for large areas, and featuring a hexagonal top surface and oval bottom with recessed side surfaces for improved grip and usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a wide brush is used to apply cosmetic formula to large areas, then application speed and coverage are improved, but precision for small areas deteriorates
Solution Approach 1:
The brush head is segmented into multiple bristle bundles of different lengths arranged in a specific pattern. The long bristles provide wide coverage for large areas, while short bristles at specific positions enable precise application for small areas like eyes and nose, allowing a single brush to replace multiple brushes.
Solution Approach 2:
Different regions of the brush head have different bristle lengths and densities tailored to specific application needs. The local quality of each bristle group is optimized for its intended use, with longer bristles for coverage and shorter bristles for precision, enabling the brush to perform both functions simultaneously.
2Measurement precision
If a narrow brush is used to apply cosmetic formula to small areas, then application precision is improved, but coverage area and speed deteriorate
Solution Approach 1:
The brush head is segmented into multiple bristle bundles of different lengths arranged in a specific pattern. The long bristles provide wide coverage for large areas, while short bristles at specific positions enable precise application for small areas like eyes and nose, allowing a single brush to replace multiple brushes.
Solution Approach 2:
The brush is designed to be universal, serving both as a wide brush for large areas and a narrow brush for small areas. The multi-functional brush head with varied bristle lengths enables the user to quickly cover large areas while maintaining the ability to precisely apply formula to small areas, eliminating the need to switch between different brush types.
3Device complexity
If conventional brushes are used for cosmetic application, then simplicity of design is maintained, but make-up finish quality deteriorates due to streaks
Solution Approach 1:
Different regions of the brush head have different bristle lengths and densities tailored to specific application needs. The local quality of each bristle group is optimized for its intended use, with longer bristles for coverage and shorter bristles for precision, enabling the brush to perform both functions simultaneously.
Solution Approach 2:
The brush allows dynamic adaptation of application technique based on the target area. Users can employ sweeping motions for large areas with long bristles and more controlled, precise movements for small areas with short bristles, enabling streak-free application across different facial regions.
Data Source
AI summary
An application brush for a cosmetic formula comprising: i) a base having a central axis and including a top surface that is perpendicular or substantially perpendicular to the central axis and a bottom that is spaced apart from the top surface along the central axis; and ii) a bundle of bristles that is mounted on the bottom of the base. Tips of bristles forming the bundle of bristles cooperate to define a virtual plane that is perpendicular or substantially perpendicular to the central axis, and the virtual plane has an oval shape.