Irregular Mascara Brush Column Layout for Uniform Smearing
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Solution Overview
Problem
Conventional mascara brushes have uniform bristle alignment, limiting the application of mascara liquid and resulting in inferior make-up performance due to insufficient smearing, and are limited in design variations.
Innovation Solution
A cosmetic applicator brush with irregularly aligned columns of bristles or combs, allowing for varied spacing, shapes, and materials, enhancing performance capabilities through improved alignment and manufacturing methods such as plastic injection molding and ultrasonic welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional injection-molded mascara brushes are used with uniform bristle alignment, then the manufacturing process is simple and consistent, but the mascara liquid does not smear on the brush sufficiently, resulting in inferior make-up performance
Solution Approach 1:
The patent applies asymmetry by intentionally creating non-uniform bristle alignment patterns in the mascara brush. The bristles are arranged with varying lengths, angles, and spacing rather than uniform alignment, which allows the mascara liquid to smear more effectively across the brush while maintaining manufacturing feasibility through modified injection molding techniques.
2Ease of manufacture
If conventional mascara brushes with even number of bristles in horizontal and vertical directions are used, then the manufacturing method is consistent and simple, but the alignment of bristles is limited and mascara liquid does not smear sufficiently
Solution Approach 1:
The patent applies dynamics by enabling variable bristle configurations that can adapt to different makeup needs. The manufacturing process is designed to accommodate varying numbers of bristles in horizontal and vertical directions, allowing the same base structure to produce different brush patterns (e.g., more bristles horizontally for volume, vertically for length) through parameter adjustments in the injection molding process rather than requiring entirely different manufacturing methods.
3Shape
If disc brush manufacturing with angular offset discs is used, then a desired bristle arrangement can be created, but a keyed system is required with keys offset relative to bristles differently for each disc, increasing device complexity
Solution Approach 1:
The patent extracts and eliminates the complex keyed system from the disc brush manufacturing approach. Instead of using multiple discs with angular offsets requiring precisely keyed shafts and discs, the invention achieves the desired bristle arrangement patterns by modifying the injection molding process to directly create varied bristle configurations in a single integrated brush structure, removing the need for multiple precision-machined components and their interlocking keying systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The irregular alignment of bristles and combs ensures uniform application of mascara liquid and allows for diverse designs, improving make-up performance and customer satisfaction with customizable features.
Implementation Method 1
manufacturing methods such as plastic injection molding and ultrasonic welding
Data Source
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AI summary
The present invention is directed to a cosmetic applicator brush comprising a plurality of columns, and a shaft. The shaft comprises a plurality of opening parts around a circumference of the shaft, and the plurality of opening parts are spaced around the circumference in a radial direction of the shaft. Each of the plurality of columns comprises bristles or combs. Each of bristles or combs has a projecting part, which are inserted into the plurality of columns with an equal distance or different distances among them. A number of the plurality of opening parts around the circumference of the shaft is both even and odd number. The plurality of columns are inserted into the opening parts of the shaft irregularly to show the zigzag effect of the cosmetic applicator brush.