Razor Cartridge with Variable Blade Angles and Gap Configuration
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Solution Overview
Problem
Conventional razor cartridges often face a trade-off between achieving a clean shave and minimizing skin irritation, as varying shave angles of the blades can either lead to effective hair cutting but increased irritation or reduced irritation with less effective cutting.
Innovation Solution
The razor cartridge design incorporates blades with different shave angles, where the first blade has a smaller angle to reduce initial irritation and the subsequent blades have larger angles to ensure a clean cut, along with a unique gap configuration between the blades to enhance shaving performance and reduce irritation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If blades with larger shave angles are used, then hair cutting effectiveness is improved, but skin irritation increases
Solution Approach 1:
The razor cartridge divides the shaving function into multiple blades with different shave angles. The first blade has a smaller shave angle (first angle) to reduce skin irritation during initial contact, while subsequent blades have larger shave angles (second angle greater than first angle) to effectively cut remaining hair. This segmentation allows each blade to perform its specific function optimally without causing excessive irritation.
Solution Approach 2:
Each blade is designed with a specific local quality in terms of shave angle. The first blade has a smaller angle suited for gentle initial shaving, while the second and subsequent blades have larger angles optimized for effective hair cutting. This local differentiation of blade angles allows the system to address both skin protection and cutting effectiveness in different zones of the shaving process.
2Object-affected harmful factors
If blades with smaller shave angles are used, then skin irritation is reduced, but hair cutting effectiveness decreases
Solution Approach 1:
The shaving task is segmented across multiple blades with progressively different angles. The first blade uses a smaller angle to minimize irritation on sensitive skin areas, while the second blade with a larger angle compensates for reduced cutting effectiveness by cleanly removing remaining hair. This segmentation ensures both skin protection and complete hair removal are achieved.
Solution Approach 2:
The first blade performs a preliminary shaving action with a smaller angle to reduce skin irritation and prepare the surface. This preliminary action softens and partially removes hair, allowing subsequent blades with larger angles to complete the cut more effectively without causing excessive irritation during the initial contact phase.
3Device complexity
If uniform blade configuration is used, then device complexity is reduced, but shaving performance is compromised
Solution Approach 1:
Rather than using uniform blades throughout, the invention applies local quality by giving each blade a specific angle configuration suited to its position and function. The first blade has a smaller angle for gentle contact, while subsequent blades have larger angles for effective cutting. This localized differentiation maintains relatively simple overall device structure while significantly improving shaving performance.
Data Source
AI summary
A razor cartridge is proposed. The cartridge may include a first blade including a first base portion and a first edge portion forming a predetermined angle with the first base portion and having a first cutting edge. The cartridge may also include a second blade located adjacent to the rear of the first blade, the second blade including a second base portion and a second edge portion forming a predetermined angle with the second base portion and having a second cutting edge. The cartridge may further include a blade housing accommodating the first blade and the second blade. A first gap, between the first cutting edge and the second cutting edge, is greater than a second gap between the first base portion and the second base portion, measured along a direction parallel to a virtual straight line passing through the first cutting edge and the second cutting edge.