Shaving Razor Head Protective Rib Guide Groove
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Solution Overview
Problem
Existing razor heads have poor shaving comfort and effectiveness due to disorderly hair flattening and high shaving resistance caused by the convex strips on the skin contact member, which results in inefficient hair removal and increased number of shavings.
Innovation Solution
A razor head design featuring a razor cartridge with protective ribs and a guide groove that aligns hair roots perpendicular to the blade, reducing shaving resistance and improving comfort by using flexible and rigid protective ribs to guide hair through the guide groove, ensuring the blade cuts in a direction perpendicular to the hair root.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If convex strips on the skin contact member are used to flatten hair roots, then the skin can be tightened and hair roots can be flattened, but the hair roots become disorderly during the flattening process resulting in poor shaving effect and increased number of shavings
Solution Approach 1:
The skin contact member is divided into multiple convex strips arranged in parallel, each strip independently flattening hair roots in the shaving direction. This segmentation allows for more precise and orderly hair alignment compared to a single flat surface, reducing disorderly hair positioning during flattening.
Solution Approach 2:
The convex strips act as intermediary elements between the skin contact member and the hair roots, providing a mechanical mediation that guides hair into a more orderly flattened state before cutting, thereby improving shaving efficiency.
2Ease of operation
If convex strips on the skin contact member are used to flatten hair roots, then the skin can be tightened and hair roots can be flattened, but the flattened hair roots cannot be ensured to be perpendicular to the cutting direction of the blades resulting in large shaving resistance
Solution Approach 1:
Each convex strip is designed with specific geometric characteristics (height, width, spacing) that create localized flattening zones. This local quality control ensures that hair roots are flattened perpendicular to the cutting direction in each zone, minimizing shaving resistance while maintaining effective hair removal.
3Productivity
If multiple shavings are performed to achieve clean hair removal, then better shaving effect can be obtained, but the shaving time and number of operations are increased
Solution Approach 1:
The convex strips perform preliminary action by pre-flattening and aligning hair roots perpendicular to the cutting direction before the blade makes contact. This preliminary alignment ensures that the first shaving pass achieves clean hair removal, eliminating the need for multiple repetitive shavings and reducing total shaving time.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enhances shaving comfort and effectiveness by reducing shaving resistance and the number of shavings, allowing for cleaner hair removal and improved alignment of hair roots for efficient cutting.
Implementation Method 1
each of the protective ribs includes a flexible protective rib located at the front and a rigid protective rib located at the rear
Data Source
Figure 1
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AI summary
Provided is a shaving razor head, comprising a shaving razor cartridge (10) and a razor blade (20). The shaving razor cartridge (10) contains a front side wall (11), a rear side wall (12), a left side wall (13), and a right side wall (14); said four walls collectively enclose an accommodating space (15). The razor blade (20) is located in the accommodating space (15). The front side wall (11) has a plurality of protective strips (30) protruding upward and arranged at intervals along the direction of the length of the shaving razor cartridge (10); each protective strip (30) extends along the direction of the width of the shaving razor cartridge (10), and each protective strip (30) contains a flexible convex strip (30a) located at the front and a rigid convex strip (30b) located at the rear; the flexible convex strip (30a) and the rigid convex strip (30b) are joined, the rigid convex strip (30b) is located in front of the razor blade (20) and is arranged adjacent to the razor blade (20), and a guide groove (31) is enclosed between the two adjacent protective strips (30). The shaving razor head has the advantages of good shaving performance and good comfort.