Twisted Cosmetic Applicator for Progressive Curling

Solution Overview

Problem

Existing mascara applicators lack progressive curving power and uniform product distribution, leading to uneven loading of product on eyelashes and eyebrows, which limits effective makeup application.

Innovation Solution

A twisted applicator with a varying cross-sectional profile and angular offset between its ends, allowing for gradual curvature and enhanced product distribution, featuring a twisted core with bristles that can be twisted over part or all of its length, and a wiping mechanism to manage excess product.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If a straight-edged brush is used, then the brush structure is simple, but the curving power is limited and product distribution is uniform without privileged zones

Engineering Contradiction:

Core Design Contradiction:

ShapeVSDevice complexity

Solution Approach 1:

The brush is given a twisted shape with a small angular offset (less than 90 degrees) between its ends, creating a progressive curvature that enables natural curling of eyelashes while maintaining a relatively simple brush structure

Inventive Principle:

Principle #14Spheroidality (Curvature)

2Shape

If a helical brush with large angular offset is used, then the curving power is enhanced, but the resistance during wiping increases and product distribution becomes less controlled

Engineering Contradiction:

Core Design Contradiction:

ShapeVSObject-affected harmful factors

Solution Approach 1:

The angular offset parameter is optimized to be less than 90 degrees (preferably between 20-60 degrees), which provides sufficient curving power for natural lash curling while minimizing resistance during the wiping operation

Inventive Principle:

Principle #35Parameter changes

3Shape

If the brush is twisted over its entire length, then the curving effect is maximized, but the manufacturing complexity and material usage increase

Engineering Contradiction:

Core Design Contradiction:

ShapeVSEase of manufacture

Solution Approach 1:

The brush is twisted only over a portion of its length rather than the entire length, segmenting the twisted and non-twisted regions to achieve the necessary curving effect while simplifying manufacturing and reducing material consumption

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP2229840B1Applicator for applying a cosmetic, makeup or care product, and method for making the same

Publication Date: 2015.06.17

Figure 1~5
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AI summary

The present invention relates to an applicator (3) comprising a rod (5) and an application member (8) at the end of this rod, the application member comprising: - a core, - projecting elements extending from the core, the application member comprising a twisted portion of a flattened cross-section envelope surface, with the largest cross-sectional dimension between 8 and 16 mm.