Hair Clipper Blade Nodes for Hair Retention and Audible Feedback
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Solution Overview
Problem
Conventional hair clippers lack sufficient auditory feedback and struggle with hair strands escaping the cutting zone, leading to inefficiencies in cutting performance and user discomfort.
Innovation Solution
The hair clipper blade features teeth with laterally projecting nodes and scalloped side faces, providing distinct rake angles and improved auditory feedback, while retaining hair within the cutting zone to enhance cutting efficiency and prevent bundling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional clipper blades with box-like teeth are used, then the structure is simple and easy to manufacture, but auditory feedback is insufficient and hair strands escape the cutting zone
Solution Approach 1:
The tooth structure is divided into multiple zones with different rake angles: a first zone with a first rake angle for initial hair engagement, and a second zone with a second rake angle for cutting. This local differentiation of geometric properties optimizes cutting performance at different stages of the cutting process, allowing the blade to provide better auditory feedback and prevent hair escape while maintaining manufacturing feasibility through standardized tooth geometries.
Solution Approach 2:
Each tooth is segmented into multiple functional zones along its length, with distinct rake angles in different segments. The first zone extends from the tooth root to a first node, and the second zone extends from the first node to the tooth tip. This segmentation allows each zone to perform a specific function in the cutting sequence, improving overall cutting reliability without requiring entirely new tooth designs.
2Reliability
If conventional single-rake-angle teeth are used, then manufacturing is simple, but hair retention in cutting zone is poor leading to fly aways
Solution Approach 1:
The tooth geometry incorporates local quality variations through different rake angles in different zones. The first zone has a shallower rake angle optimized for hair engagement and retention, while the second zone has a steeper rake angle optimized for cutting. This localized geometric optimization improves hair retention in the cutting zone and prevents fly aways, while the overall tooth structure remains compatible with conventional manufacturing processes.
3Reliability
If conventional blade teeth are used, then the structure is straightforward, but no auditory feedback is provided during cutting
Solution Approach 1:
The dual-zone rake angle structure creates distinct acoustic characteristics during operation. The first zone with its specific rake angle produces audible feedback when engaging and guiding hair into the cutting zone, while the second zone produces characteristic sounds during the actual cutting action. This local geometric differentiation enables auditory feedback without requiring complex additional components, as the feedback arises naturally from the optimized tooth-zone interactions with hair.
Data Source
AI summary
A bladeset operationally connected to a hair clipper is provided, the bladeset including a stationary blade and a moving blade configured for reciprocating laterally relative to the stationary blade, where at least one of the stationary blade and the moving blade including a base and a plurality of teeth extending from the base. Each tooth includes a root where the tooth connects to the base, a tip on an opposite side of the tooth from the root, a rear face, and two side faces, each side face including a first projection and a second projection extending from the rear face, the first projection being closer to the tip than the second projection.