Thin Blade Support Geometry for Razor Head Precision
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing blade supports for shaving razors do not adequately address issues of shaving performance and manufacturing efficiency, leading to skin irritation and difficulty in shaving hard-to-reach areas due to suboptimal design and thickness.
Innovation Solution
A blade support with a maximum thickness of 0.12 to 0.21 millimeters, featuring a specific geometry with a radius of curvature and angle, made of metal, which improves glideness and precision by allowing a smaller gap between edges and reducing skin bulging, and is integrated into a razor head with a movable cutting member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the blade support thickness is reduced to improve glideness and reduce skin bulging, then skin irritation is reduced and shaving precision is improved, but the structural strength and durability may be compromised
Solution Approach 1:
The patent applies parameter changes by optimizing the blade support thickness to a specific range (0.05-0.15mm) and the intermediate bent portion radius of curvature (0.05-0.5mm) to achieve the right balance between thinness for reduced skin irritation and sufficient strength for durability. This precise parameter control resolves the contradiction between thinness and strength.
Solution Approach 2:
The patent uses curvature by designing the intermediate bent portion with a specific radius of curvature (0.05-0.5mm) to create a smooth transition that reduces skin bulging while maintaining structural integrity. The curved geometry distributes stress more effectively than sharp angles, resolving the strength-thickness contradiction.
2Manufacturing precision
If the blade support thickness is reduced to enable a smaller razor head for difficult areas, then shaving precision is improved, but manufacturing complexity increases
Solution Approach 1:
The patent specifies precise parameter ranges (thickness: 0.05-0.15mm, radius of curvature: 0.05-0.5mm) that can be achieved through standard metal forming and bending processes. These parameters balance the need for precision with manufacturability using conventional techniques.
Solution Approach 2:
The patent applies local quality by concentrating the complex curved geometry only where needed (the intermediate bent portion) while keeping other portions simpler. This localized complexity achieves the required precision without making the entire manufacturing process overly complex.
3Ease of operation
If the blade support thickness is optimized to reduce the gap from edge to edge, then glideness is improved, but the structural stability may be reduced
Solution Approach 1:
The patent optimizes the thickness parameter to 0.05-0.15mm, which is thin enough to improve glideness by reducing the gap from edge to edge, but thick enough to maintain structural stability. This parameter optimization resolves the contradiction between operational ease and structural stability.
Solution Approach 2:
The curved intermediate bent portion with radius of curvature 0.05-0.5mm distributes mechanical stresses more effectively, maintaining structural stability even with reduced overall thickness. The curvature provides inherent structural reinforcement that compensates for the thinner profile.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Blade support (34) for a shaving razor (1), having an inner face (48) and an outer face (49) comprising: - an elongated lower portion (35), - an elongated upper portion (39), and - an elongated intermediate bent portion (36) intermediate the lower and upper portions, Said upper portion extending forward said intermediate bent portion to a top side (46), Said lower portion extending downward from said intermediate bent portion to a bottom side (47) said blade support has a thickness of between 0.12 and 0.21 millimetres (mm).