Variable Pitch Mascara Brush Zoned Application
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Solution Overview
Problem
Conventional mascara brushes lack versatility in application surfaces and product retention, leading to insufficient mascara delivery, clumping, and contamination issues due to uniform bristle distributions and fixed application profiles.
Innovation Solution
A mascara brush with a molded plastic body featuring a cylindrical core and helically arranged coating surfaces with varying axial distances and bristle distributions, allowing for adjustable product retention and application to different lash areas, providing multiple makeup effects in a single use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional twisted wire brushes with uniformly distributed bristles are used, then the brush structure is simple and easy to manufacture, but the application versatility is limited and product retention is insufficient
Solution Approach 1:
The brush is divided into multiple distinct zones along its length, each zone having different bristle characteristics (density, length, direction). This segmentation allows each zone to perform specific functions (root application, mid-lash coating, tip definition) while maintaining a relatively simple overall brush structure that can still be manufactured using conventional techniques.
Solution Approach 2:
Different regions of the brush are given different local qualities through variations in bristle density, length, and orientation. The proximal zone has denser bristles for product pickup, the intermediate zone has medium density for application, and the distal zone has sparser bristles for definition, allowing the single brush to provide multiple application effects.
2Quantity of substance
If uniform bristle distribution is used, then the brush is easy to manufacture, but product retention is insufficient leading to repeated container insertions
Solution Approach 1:
The brush structure is segmented into zones with different bristle densities, creating natural product reservoirs in the denser proximal and intermediate zones. This segmentation increases product retention capacity without requiring additional manufacturing steps or complex assembly processes.
3Quantity of substance
If excessive mascara is loaded on the brush, then sufficient product is available for application, but clumping occurs and separation ability is reduced
Solution Approach 1:
Product is segmented and distributed across multiple zones along the brush length, with each zone holding a controlled amount. This prevents excessive product concentration in one location, reducing clumping while ensuring sufficient product availability throughout the brush for complete lash coverage.
Solution Approach 2:
Different zones have different product retention capacities matched to their application functions. The denser proximal zone holds more product for initial loading, while the sparser distal zone holds less product for precise tip work, creating local quality variations that prevent overwhelming product application and clumping.
4Quantity of substance
If repeated container insertions are made to load more product, then sufficient mascara is applied, but container contamination increases
Solution Approach 1:
The brush is segmented into multiple product-retaining zones that collectively hold sufficient mascara for complete application. This eliminates the need for repeated container insertions, as all necessary product is retained on the brush in a single loading action, thereby preventing contamination.
5Adaptability or versatility
If a single brush profile is used, then the brush structure is simple, but multiple application effects (thickening, lengthening, separation) cannot be achieved
Solution Approach 1:
The brush is segmented into functional zones that can be used in different sequences or combinations to achieve various makeup effects. For thickening, the proximal zone is used first; for lengthening, the intermediate zone is emphasized; for separation, the distal zone is utilized, all from a single brush structure.
Solution Approach 2:
The single brush is designed to perform multiple functions through its zoned structure. The same brush can provide thickening, lengthening, and separation effects by utilizing different zones, eliminating the need for multiple specialized brushes while maintaining structural simplicity.
Data Source
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AI summary
A brush for applying mascara or the like, comprising an elongated core and a plurality of coating surfaces axially spaced along the elongated core, distributed around the core over a substantial portion of the length of the core extending from the distal end thereof. The coating surfaces are arranged in a plurality of rows forming turns of at least one helix extending lengthwise of the core and spaced laterally around the core periphery. The axial distance between consecutive rows of coating surfaces varies longitudinally along the core.