Twisted Wire Cosmetic Brush with Segmented Bristle Fingers
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Solution Overview
Problem
Existing eyelash brush designs either distribute mascara evenly between lashes or lengthen lashes, but not both effectively, requiring the use of multiple brushes, which is cumbersome.
Innovation Solution
A cosmetic brush unit with a bristle carrier formed by twisted wires holding filaments that form radially extending bristles, where the bristles are divided into multiple fingers at the ends to penetrate between lashes and straighten them when pressed against the eyelid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If bristles are made thin and soft to distribute mascara evenly between lashes, then mascara distribution is improved, but the ability to straighten and lengthen lashes deteriorates
Solution Approach 1:
Each bristle is divided into multiple bristle fingers at its free end, creating segmented structures that can independently penetrate between lashes while the main bristle body provides stiffness for straightening. This segmentation allows simultaneous achievement of even mascara distribution and lash straightening.
Solution Approach 2:
The bristle structure has different properties at different locations: the main body maintains sufficient diameter and stiffness for straightening, while the free ends are divided into thinner bristle fingers for penetrating between lashes and distributing mascara evenly. This local quality variation resolves the contradiction.
2Ease of operation
If bristles are made stiffer and fewer to straighten and lengthen lashes, then lash straightening is improved, but mascara distribution between lashes deteriorates
Solution Approach 1:
The division of bristle ends into multiple fingers creates thinner penetration elements that can reach between lashes, compensating for the overall bristle stiffness and enabling effective mascara distribution while maintaining the straightening function of the main bristle body.
Solution Approach 2:
The bristle structure transitions from a stiffer main body (for straightening) to thinner bristle fingers at the free ends (for mascara distribution), allowing each region to perform its optimal function and resolving the contradiction between straightening and distribution capabilities.
3Device complexity
If a single brush unit is designed to perform both even mascara distribution and lash straightening, then device complexity is reduced, but manufacturing precision of the bristle structure deteriorates
Solution Approach 1:
The systematic division of each bristle into multiple fingers creates a standardized structure that can be manufactured with consistent precision across all bristles, enabling reliable performance of both functions in a single brush unit without excessive complexity.
Solution Approach 2:
The patent combines multiple functions (lash straightening and mascara distribution) into a single brush unit by integrating differently structured elements (main bristle body and bristle fingers) into one unified component, reducing device complexity while maintaining manufacturing precision through standardized design.
Data Source
AI summary
The invention relates to a cosmetic brush unit (1) comprising a bristle carrier (2) in the form of at least two twisted wires (3) holding a plurality of filaments (4) clamped so that each filament (4) forms outwardly extending bristles (4) constituting a brush, characterised in that the bristles (4) preferably have a diameter in the range 0.076 mm to 0.3556 mm and wherein the bristles (4) are divided into several preferably at least four bristle fingers (5) in the region of their free distal ends.