Razor Cartridge With Embedded Blades And Raised Ridges
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional razors fail to maintain consistent facial hair length, leading to discomfort and inefficiency in shaving stubble or scruff, as they often cause pinching, tugging, and uneven cuts due to gaps between blades and guards, and are not designed for travel or dry shaving.
Innovation Solution
A razor assembly with a cartridge housing blades without gaps, featuring raised ridges and angled blades embedded within a single injection-molded unit, ensuring even cutting and comfort by eliminating hair snagging and allowing for efficient hair removal without traditional shaving aids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional razors with gaps between blades and guards are used, then manufacturing is simpler, but hair pinching and tugging occurs causing discomfort
Solution Approach 1:
The patent merges the blade assembly and guard into a single integrated cartridge unit where the guard continuously contacts the skin surface without gaps. This integration eliminates the separation between cutting elements and protective guard, preventing hair from being pinched or caught while maintaining structural coherence through single-shot injection molding or assembly of interconnected components.
Solution Approach 2:
The patent applies local quality by creating a continuous guard surface that selectively contacts the skin only in specific areas where needed for protection, while leaving other areas open for blade access. The guard's geometry is locally optimized to provide protection precisely where hair pinching occurs without interfering with the cutting function.
2Ease of operation
If raised guards are used to maintain hair length, then hair length control is improved, but hair shafts get caught between guard and blade
Solution Approach 1:
The patent merges the guard and blade assembly into a unified structure where the guard continuously contacts the skin surface, eliminating the gap that previously caused hair to be caught. This integration ensures that the guard and blade work as a coordinated system, with the guard's continuous surface preventing hair shafts from being snagged while maintaining precise hair length control.
Solution Approach 2:
Instead of having the blade protrude beyond the guard as in traditional razors, the patent inverts the arrangement by having the guard continuously contact the skin surface with the blade positioned to cut without creating gaps. This inversion of the traditional guard-blade spatial relationship eliminates the mechanism that causes hair snagging.
3Ease of operation
If manual razors are used for stubble maintenance, then cost is lower, but consistent hair length cannot be maintained
Solution Approach 1:
The patent applies dynamics by designing the cartridge with a continuous guard surface that dynamically adapts to the skin contour during shaving. The guard's geometry allows it to maintain consistent contact pressure and spacing across varying skin surfaces, ensuring uniform hair length control. The blade arrangement also incorporates angular orientations that dynamically engage with hairs at different angles for consistent cutting.
Solution Approach 2:
The patent creates a universal cartridge design that can maintain consistent hair length across different facial areas and hair growth patterns. The continuous guard surface and multi-angled blade configuration provide a multi-functional solution that works effectively whether shaving stubble, scruff, or maintaining a 5 o'clock shadow, making the device universally applicable to various facial hair maintenance needs.
4Ease of operation
If electric razors are used for stubble, then consistent hair length is maintained, but device bulk and cost increase
Solution Approach 1:
The patent employs the disposable cartridge concept where the entire blade assembly and guard are integrated into a single replaceable unit. This allows the complex, precision-engineered continuous guard structure to be manufactured economically as a disposable component, eliminating the need for expensive, heavy electric motor mechanisms while achieving similar hair length consistency through clever mechanical design.
Solution Approach 2:
The patent extracts the essential function of maintaining consistent hair length from the complex electric motor system and achieves it through a simplified mechanical approach. By removing the motor, battery, and electronic controls, the invention retains only the critical blade and guard geometry needed for consistent cutting, dramatically reducing weight while preserving the hair length control function.
Data Source
AI summary
A razor assembly includes a cartridge assembly with a plurality of raised ridges that slide against the surface of a user's skin and offset a distance relative to the surface of the user's skin at which one or more blades cut hair.