Razor Cartridge Blade Spacing for Lower Skin Pressure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional razors face challenges in providing improved shaving performance within a compact structure, often resulting in increased size or complex designs that compromise user comfort and efficiency.
Innovation Solution
A razor assembly with a razor cartridge and handle that incorporates an interposed element between the blades, forming noncutting areas on the shaving plane to reduce pressure and enhance comfort, while maintaining a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional razors use multiple blades arranged closely together to improve shaving coverage, then the shaving plane area increases, but the skin pressure increases causing wounds and cuts
Solution Approach 1:
The shaving plane is segmented into multiple independent blade units arranged in series. Each blade processes a portion of the hair, and the interposed elements create spacing between blade groups. This segmentation allows the large shaving plane area to be divided into smaller pressure zones, reducing the cumulative skin pressure while maintaining comprehensive hair coverage.
Solution Approach 2:
Interposed elements are introduced as intermediary components between the blade groups. These elements physically separate the cutting edges, creating noncutting areas that allow skin relief zones. The intermediaries transfer and distribute the contact pressure, preventing concentration of force on single skin areas while maintaining overall shaving effectiveness.
2Productivity
If razors add more blades or larger blade area to improve shaving performance, then the cutting capacity increases, but the device size increases
Solution Approach 1:
The blade assembly is segmented into multiple small blade units rather than using fewer large blades. This segmentation allows the cutting capacity to be distributed across several compact elements arranged in a space-efficient configuration, maintaining high productivity within a compact cartridge volume.
Solution Approach 2:
The blades are arranged in a multi-dimensional configuration within the cartridge, utilizing longitudinal, transverse, and vertical spacing. The interposed elements are positioned at specific heights to create three-dimensional spacing, allowing maximum cutting capacity within minimal cartridge footprint by efficiently utilizing available space in multiple dimensions.
3Volume of moving object
If razors use closely spaced blades to maintain compact size, then the device remains compact, but the shaving quality deteriorates due to increased skin pressure
Solution Approach 1:
The compact blade assembly is segmented into groups with interposed elements creating internal spacing. This segmentation maintains the compact external dimensions while creating pressure relief zones internally, allowing skin to be released from continuous blade pressure even though the overall cartridge remains compact.
Solution Approach 2:
Interposed elements serve as mediators between the closely spaced blades and the skin. These elements are positioned to create noncutting areas that provide skin relief while maintaining the compact blade arrangement. The intermediaries ensure that close blade spacing does not directly translate to continuous skin contact, preserving shaving quality within compact dimensions.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Disclosed are a razor assembly 10, and a razor handle 100 and a razor cartridge 200 which are applied to the razor assembly, the razor assembly including: a razor cartridge including a plurality of blades 220 including cutting edges 223, and a blade housing 210 accommodating the plurality of blades in a longitudinal direction; and a handle coupling with the razor cartridge, and including a head 120, an interposed element 122 provided at a first side of the head, and a grip extended from a second side of the head, the interposed element being accommodated inside the razor cartridge and interposed between the plurality of blades.