Non-Uniform Spike Applicator for Keratin-Fiber Disentangling
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Solution Overview
Problem
Existing applicator devices for fluid or pasty products on keratin fibers, such as mascara brushes, lack optimal application and disentangling efficiency due to uniform spike distribution and arrangement.
Innovation Solution
The applicator device features a core with spikes having non-uniformly distributed, staggered, and varied spike arrangements, with each spike comprising a first and second stage defined by a complex surface generated by a generatrix, allowing for a chaotic distribution of spike ends for improved application and disentangling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform spike distribution and arrangement are used, then manufacturing simplicity is maintained, but application optimization and disentangling efficiency deteriorate
Solution Approach 1:
The patent applies asymmetry by defining spikes with non-uniform characteristics: each spike has a first stage with radius R1 and a second stage with radius R2 where R1 ≠ R2, creating asymmetric profiles that optimize product application while maintaining manufacturability through standardized geometric parameters
Solution Approach 2:
The patent implements local quality by varying the spike parameters (radii R1 and R2, heights H1 and H2) at different locations along the core. The joint face position and stage dimensions are locally optimized to enhance disentangling efficiency and product distribution specific to each region of the applicator
2Stability of the object's composition
If uniform spike arrangement is used, then structural regularity is maintained, but product application and fiber disentangling efficiency deteriorate
Solution Approach 1:
The patent applies parameter changes by systematically varying the geometric parameters of spikes (radii R1 and R2, heights H1 and H2, and joint face positions) along the core length. This creates controlled irregularity in spike arrangement that enhances disentangling efficiency while maintaining overall structural stability through consistent parameter variation patterns
3Productivity
If complex non-uniform spike distribution is used, then application efficiency is optimized, but manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing each spike into distinct stages (first stage with radius R1 and second stage with radius R2) separated by a joint face. This segmentation allows complex non-uniform distributions to be achieved through modular geometric elements that can be manufactured using standardized processes while maintaining application efficiency
Data Source
AI summary
An application device for applying a fluid product to keratin fibres includes a plurality of spikes that are distributed over an elongate core extending along a longitudinal axis X. Each spike has a first stage that extends from an anchoring end in the core towards an intermediate section, a second stage that extends from the intermediate section towards a free end, and a joint face parallel to the longitudinal axis X. Each spike has an intermediate point and an apical point.