Facial Cleansing Brushhead With Segmented Outer and Inner Portions
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Solution Overview
Problem
Existing skin cleansing brushheads often fail to efficiently direct and remove cleansing fluid to and from the active cleaning areas, leading to inadequate cleansing and residue trapping.
Innovation Solution
A brushhead design featuring a fixed outer brush portion with elastomeric fingers and oscillating inner brush portion with non-circular concentric rows of tufts, allowing fluid flow to the active area and facilitating its removal, while the counter-rotating effect enhances cleansing efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional brushhead design is used, then the structure is simple, but the fluid flow to and from the active portion is inefficient
Solution Approach 1:
The brushhead is divided into multiple functional segments: a stationary outer brush portion and a rotating inner brush portion, each with distinct bristle patterns and functions. This segmentation allows optimized fluid flow paths while maintaining manageable structural complexity
Solution Approach 2:
The design incorporates radial and axial variations in bristle length, density, and orientation across different portions of the brushhead. This multi-dimensional arrangement creates effective fluid flow channels without requiring complex mechanical structures
2Productivity
If the entire brushhead oscillates, then the cleansing coverage is increased, but the control and precision are reduced
Solution Approach 1:
The brushhead separates oscillating and stationary functional zones, allowing the inner portion to rotate for enhanced cleansing coverage while the outer portion remains stationary for stable positioning and precise control during application
Solution Approach 2:
The design merges two different motion states (rotating and stationary) within a single brushhead assembly, combining the benefits of both dynamic cleansing action and stable, controlled application in one integrated structure
3Productivity
If dense bristle arrangement is used, then the cleansing effectiveness is improved, but the fluid flow and residue removal are hindered
Solution Approach 1:
Different portions of the brushhead have locally optimized bristle characteristics: the inner rotating portion has denser bristles for intensive cleansing, while the outer stationary portion has sparser arrangement to facilitate fluid flow and residue removal
Solution Approach 2:
The bristle arrangement varies in multiple dimensions including radial density, axial length, and angular orientation, creating pathways for fluid flow while maintaining effective cleansing contact with the skin surface
Data Source
AI summary
The brushhead includes an outer brushhead which is fixed in operation when the brushhead is attached to a skin brush appliance and an inner brushhead which oscillates in operation. The outer brushhead includes three spaced sections of elastomeric fingers and three spaced sections of tufts positioned, respectively, between the elastomeric finger sections. The inner brushhead includes a plurality of non-circular concentric rows of tufts.