Brush Head Flow Path Structure for Cleaner Composition Dispensing
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Solution Overview
Problem
Cosmetic and shave brushes made of natural hair bristles often produce unpleasant odors and entrain product, leading to inefficiencies and bacterial buildup, while existing dispensing containers with brushes struggle with product distribution, resulting in unsatisfactory application and waste.
Innovation Solution
A brush head design with a base and bristles where the distal end has a higher bristle density than the proximal end, forming a flow path from the distal end towards the proximal end, and incorporating a dispensing tube and region of low bristle population to facilitate efficient composition transport and reduce messiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If natural hair bristles are used in brushes, then the brush can effectively apply and froth compositions, but the brush produces unpleasant odors and creates bacterial buildup
Solution Approach 1:
The patent employs synthetic bristles that are non-absorbent and resistant to bacterial growth, effectively creating a disposable-like experience where the brush head can be easily replaced. This eliminates the odor and bacterial buildup issues associated with natural hair bristles while maintaining effective composition application.
2Productivity
If natural hair bristles are used, then the brush can entrain air within compositions to create froth, but the brush also entrains product, leading to waste and unsatisfactory application
Solution Approach 1:
The patent implements a gradient bristle density structure where the distal end has higher bristle density and the proximal end has lower bristle density. This local variation in bristle properties allows the brush to effectively entrain air for froth creation at the distal end while minimizing product entrapment, thereby reducing product waste and improving application quality.
3Ease of operation
If plastic or rubber dispensing channels are used to direct composition to the brush, then the composition can be delivered to the brush, but the composition spreads within the brush and may not reach the tip where it is most needed
Solution Approach 1:
The patent removes the traditional plastic or rubber dispensing channel from the brush structure. Instead, the composition is delivered directly to the brush bristles through a controlled opening in the container, eliminating the spreading issue and ensuring precise composition placement at the brush tip where it is most needed.
4Ease of manufacture
If uniform bristle density is used throughout the brush, then the brush structure is simple to manufacture, but the composition does not flow efficiently through the brush to the skin contacting region
Solution Approach 1:
The patent implements a gradient bristle density structure where the distal end has higher bristle density and the proximal end has lower bristle density. This local variation creates natural flow paths that guide composition from the base toward the skin contacting region, improving composition flow efficiency while maintaining manufacturability through a systematic gradient design.
Data Source
AI summary
A brush for providing a composition to a surface. The brush includes a base and a plurality of bristles. The plurality of bristles have a distal end and a proximal end. The distal end is functionally attached to the base and the distal end has a greater bristle density than the proximal end. The plurality of bristles forms at least one flow path from the distal end towards the proximal end.