Hair Clipper Cutting Head with Modular Tines
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Solution Overview
Problem
Existing hair clippers and shavers struggle to effectively capture and cut short or flat-lying hairs, which can lead to an incomplete shave, despite advancements in cutting head design.
Innovation Solution
The cutting head incorporates tines with different geometries and materials, such as thermoplastics or ceramics, that are added as separate threading or positioning elements to the existing flat cutting unit, allowing for enhanced hair capture and cutting without increasing production costs. These tines are designed to protrude above the contact surface and are movably coupled to the lower blade for improved oscillation, ensuring effective hair removal without colliding with the upper blade.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the upper blade is designed with free-standing web ends to capture short or flat-lying hairs, then the closeness of the shave is improved, but the manufacturing complexity increases
Solution Approach 1:
The invention divides the upper blade into modular components: standard webs with slots and additional free-standing threading elements (prongs) that can be separately manufactured and then attached to the blade structure. This segmentation allows the complex threading function to be added without redesigning the entire blade, maintaining manufacturing simplicity while improving shave closeness.
Solution Approach 2:
The invention combines two different blade design approaches into a single hybrid structure: the traditional stamped/etched metal sheet with slots, and the free-standing threading elements with complex geometries. By merging these approaches, the blade achieves both the manufacturing efficiency of stamped metal and the enhanced hair-capturing capability of complex 3D threading elements.
2Manufacturing precision
If complex threading elements with different geometries are manufactured directly into the upper blade, then the hair capture capability is improved, but the production costs increase
Solution Approach 1:
The invention separates the threading elements from the main blade body, allowing them to be manufactured independently using optimized processes (such as injection molding for plastic prongs or precision machining for metal tips). These separate components are then attached to the stamped metal blade, avoiding the need to manufacture the entire blade with complex geometries, thereby reducing production costs while maintaining superior hair capture capability.
Solution Approach 2:
The invention introduces an intermediary attachment mechanism (such as adhesive bonding, mechanical interlocking, or ultrasonic welding) that connects the separately manufactured threading elements to the main blade structure. This intermediary approach enables the use of different manufacturing processes for different components, optimizing both cost and performance without requiring a single complex manufacturing process for the entire blade.
3Manufacturing precision
If prongs are added to the cutting head to enhance threading functionality, then the hair raising effect is improved, but the device complexity increases
Solution Approach 1:
The invention applies local quality enhancement by adding threading prongs only in specific locations where hair capture is most needed, rather than uniformly modifying the entire blade. The prongs are strategically positioned to target short or flat-lying hairs in critical areas, providing localized improvement in hair raising effect while minimizing the overall structural complexity of the cutting head.
Solution Approach 2:
The invention designs the prongs to serve multiple functions: they act as threading elements to raise hairs, provide structural support in the cutting head assembly, and can be integrated with the oscillation mechanism. This multi-functionality reduces the need for separate components, thereby improving hair raising capability without proportionally increasing device complexity.
Data Source
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AI summary
In a cutting head (1) for hair clippers having an upper cutter (5) formed by a plurality of bars (6, 7) and slots (13) between the bars (6, 7), said bars (6, 7) forming a contact face (8) for contact with the skin and a shear face opposite the contact face (8), and having a lower cutter (21) that has a multiplicity of cutting blades (20), is able to be driven in an oscillating movement relative to the upper cutter (5) and is guided in abutment with the shear face of the upper cutter (5), wherein at least one of the bars (6, 7) of the upper cutter (5) is formed with a free end (9) in the plane of the contact face (8), and a tooth (11) different from the upper cutter (5) adjoins the at least one bar (6) having a free end (9).