Dual-Sided Cosmetic Brush with Segmented Bristle Properties

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Solution Overview

Problem

Conventional cosmetic brushes are limited to single-function designs, requiring multiple brushes for various makeup applications, whereas dual-purpose brushes with bristles projecting sideways are not suitable for many cosmetic uses where endway bristles are preferred.

Innovation Solution

A brush with a head comprising bristles extending in the same direction, featuring two sides with different properties, such as stiffness, thickness, material, or color, allowing for distinct functions like application and blending of cosmetics without cross-contamination.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single brush is used for multiple functions, then the number of brushes needed is reduced, but the brush structure becomes more complex

Engineering Contradiction:

Improvebrush functionVSAvoidbrush structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The brush head is divided into two distinct sides, each with different bristle properties (one side with stiffer bristles for application, one side with softer bristles for blending). This segmentation allows a single brush to perform multiple functions while maintaining simple individual components.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the brush head have different bristle characteristics - one side uses stiffer bristles suitable for product application, while the other side uses softer bristles suitable for blending. This local differentiation enables multi-functionality without requiring a complex overall structure.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If bristles project sideways from the handle in opposite directions, then either set of bristles can be used independently, but the brush is unsuitable for many cosmetic applications where endway bristles are preferred

Engineering Contradiction:

Improvebrush functionVSAvoidcosmetic application suitability

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

Instead of projecting bristles sideways from the handle as in conventional multi-function brushes, this invention extends bristles endways from the brush head, inverting the conventional approach. This allows the brush to maintain proper cosmetic applicator geometry while achieving multi-functionality through the two-sided head design.

Inventive Principle:

Principle #13The other way round (Inversion)

3Adaptability or versatility

If different sides of the brush head have different properties, then distinct functions like application and blending are enabled, but the manufacturing process becomes more complex

Engineering Contradiction:

Improvebrush functionVSAvoidbrush head production

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The brush head is manufactured as two separate halves, each containing bristles with the required specific properties. This segmentation simplifies the manufacturing process by allowing each half to be produced independently with standardized procedures, then assembled together to form the complete multi-functional brush head.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS8256058B2Dual sided cosmetics brush

Publication Date: 2012.09.04 ANISA INTERNATIONAL INC

AI summary

One embodiment of a cosmetic applicator brush comprises a handle and a brush head. The head is in two halves made of different bristles.