Twisted Eyelash Brush with Inclined Facets for Product Loading
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Solution Overview
Problem
Conventional mascara brushes with uniform bristle lengths and cylindrical shapes are inefficient for loading and separating eyelashes, particularly at the corner of the eye, and require numerous tests to achieve optimal makeup results, while also being difficult to manufacture quickly and easily.
Innovation Solution
A brush with a twisted core and bristles featuring an envelope surface with inclined facets that increase in width towards the distal end, providing a more complex shape for precise makeup application and improved product loading, along with a manufacturing method using a cutting tool to define the facet length and distance from the core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the brush has a cylindrical envelope surface with uniform bristle length, then the brush is easy to manufacture, but the brush has limited effectiveness in loading eyelashes with product and separating them
Solution Approach 1:
The envelope surface is segmented into multiple zones with different bristle lengths (first zone with longer bristles for product loading, second zone with shorter bristles for separation). This segmentation allows different portions of the brush to perform different functions, resolving the contradiction between manufacturing simplicity and application effectiveness.
Solution Approach 2:
Different regions of the brush envelope surface are given different local qualities through varying bristle lengths. The first zone has longer bristles optimized for loading product onto eyelashes, while the second zone has shorter bristles optimized for separating eyelashes. This local differentiation enables the brush to perform multiple functions effectively.
2Reliability
If the envelope surface has a complex shape with zones of different product loading, then the brush can properly load and separate eyelashes, but numerous tests are required to find the optimal shape
Solution Approach 1:
The envelope surface is divided into a predetermined number of zones (first zone for loading, second zone for separation) with clearly defined boundaries and characteristics. This segmentation provides a structured approach to brush design that reduces the need for extensive testing compared to optimizing a completely complex shape.
Solution Approach 2:
The brush is designed with predetermined zone configurations that are established during the design phase. The first zone is configured with longer bristles for product loading and the second zone with shorter bristles for separation, allowing the optimal configuration to be predetermined rather than requiring numerous tests to discover.
3Reliability
If the brush has an envelope surface with zones for product loading and separation, then makeup application is improved, but the brush structure becomes more complex
Solution Approach 1:
The envelope surface is segmented into distinct zones with different bristle lengths, creating a multi-functional brush structure. The first zone with longer bristles handles product loading while the second zone with shorter bristles handles separation, enabling improved makeup application through functional segmentation.
Solution Approach 2:
The brush design adds dimensional variation to the envelope surface by creating zones at different radial distances from the core. The first zone extends to a first radial distance with longer bristles, while the second zone extends to a second radial distance with shorter bristles, utilizing spatial dimensionality to create functional zones.
Data Source
AI summary
The present invention relates to a brush for applying a product to the eyelashes and/or eyebrows, that includes a core that extends along a longitudinal axis, and bristles held by the core, the core comprising a bristle-carrying portion with a proximal end, intended to be fixed to a stem, and a distal end, the bristles having free ends defining an envelope surface, the envelope surface having at least one cross section with a not entirely polygonal shape, the envelope surface defining at least one facet which extends longitudinally and is inclined with respect to the longitudinal axis of the core in the direction of the distal end, the facet having a width which increases in the direction towards the distal end of the bristle-carrying portion of the core, over at least a portion of the length of the facet.