Razor Guard Bar Groove Segmentation for Shaving Aid Distribution
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Solution Overview
Problem
Razor heads with guard bars having perpendicular grooves do not provide even distribution of shaving aid and proper hair alignment, resulting in suboptimal shaving properties.
Innovation Solution
A razor head design featuring a guard bar with grooves that include a deep section, a shallow section, and a sloped section, connected by rounded portions, which helps in even distribution of shaving aid and improves hair alignment by guiding hairs to the blade edge, while the sloped section facilitates water flow and reduces hair bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a guard bar with perpendicular grooves is used, then the structure is simple, but the shaving aid distribution is uneven and hair alignment is poor
Solution Approach 1:
The guard bar groove is divided into three distinct sections: a deep section at the front end, a shallow section at the rear end, and a sloped section connecting them. This segmentation allows each section to perform a specific function - the deep section captures and distributes shaving aid, the shallow section guides hairs, and the sloped section facilitates water flow and transition, thereby improving overall shaving comfort without requiring multiple separate components
Solution Approach 2:
Different sections of the groove have different depths and geometries tailored to specific local functions. The deep section has greater depth for shaving aid reservoir, the shallow section has reduced depth for hair guidance, and the sloped section has a specific inclination angle (10-45 degrees) for water flow. This local differentiation of groove properties optimizes each region's performance for its specific task
2Ease of operation
If a uniform groove depth is used, then the manufacturing is simple, but the shaving aid distribution and water flow are suboptimal
Solution Approach 1:
The groove geometry transitions dynamically from the deep section through the sloped section to the shallow section, creating a gradient structure that adapts to different functional requirements along the groove length. This dynamic geometric variation optimizes both shaving aid distribution at the front and water flow toward the blade, while the continuous sloped transition between sections facilitates manufacturability
3Ease of operation
If the guard bar is positioned forward of the blade edge, then hair alignment is improved, but the groove design becomes more complex
Solution Approach 1:
The guard bar with its three-section groove structure serves multiple functions simultaneously: it distributes shaving aid through the deep section, aligns and guides hairs through the shallow section, and facilitates water flow through the sloped section. This multi-functionality is achieved within a single integrated guard bar structure, avoiding the need for additional separate components while improving hair alignment
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 by ensuring even distribution of shaving aid, reducing hair pulling, and improving control during shaving, leading to a more consistent and comfortable shave with better rinsability.
Implementation Method 1
a sloped section connecting the deep section to the shallow section... the sloped section facilitates water flow
Data Source
AI summary
A razor head is provided that includes a main frame member, at least one blade member mounted on the main frame member, having a blade edge extending along a transversal axis, and a guard bar having a plurality of grooves extending along a longitudinal axis. Each groove includes a deep section located next to the groove front end, a shallow section located next to the groove rear end, and a sloped section connecting the deep section to the shallow section.