Multi-Layer Erodible Razor Strip for Wear Status
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing razor cartridges lack an effective indication for when they are nearing the end of their optimal shave performance, with two-color lubrication strips only providing a distinction between optimal and sub-optimal performance, failing to alert users before the cartridge's performance significantly declines.
Innovation Solution
A skin engaging member with multiple erodible layers of different colors, where each layer contains varying amounts of lubricious water-soluble polymer, allowing for sequential exposure as the user shaves, providing a color change indication that the cartridge is approaching or has reached the end of its optimal performance life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a two-color lubrication strip is used to indicate cartridge wear, then the user can distinguish between optimal and sub-optimal performance, but the user cannot receive advance notification that the cartridge is approaching the end of optimal performance
Solution Approach 1:
The lubrication strip is divided into three distinct colored layers (first color, second color, third color) arranged in sequence. As the strip erodes during use, each layer is exposed in turn, providing segmented information about the cartridge's performance status: optimal performance, approaching end of optimal performance, and end of optimal performance reached.
Solution Approach 2:
The third color layer is positioned beneath the first and second color layers to provide advance notification before the cartridge reaches the end of its optimal performance. This preliminary indication allows the user to prepare for replacement in advance, rather than waiting until performance has already degraded.
2Reliability
If the lubrication strip provides only end-of-life indication, then the user knows when to replace, but the user cannot prepare in advance for replacement
Solution Approach 1:
The third color layer serves as a preliminary warning signal that appears before the cartridge reaches the end of its optimal performance. This allows the user to initiate the replacement process in advance, ensuring continuous availability of optimal performance cartridges without interruption.
Solution Approach 2:
The multi-color strip provides continuous visual feedback about the cartridge's performance status throughout its lifecycle. The sequential disclosure of different colors gives the user real-time information about when to plan for replacement, enabling proactive rather than reactive cartridge management.
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 sequential color change from green to yellow and then red provides the user with timely notification to replace the razor cartridge, ensuring continued optimal shaving performance and preventing sub-optimal results.
Implementation Method 1
Upon exposure to water, the water-soluble shaving aid leaches from the skin engaging member onto the skin
Implementation Method 2
The second layer is adapted to wear at a faster rate than the first layer during shaving
Implementation Method 3
As the user shaves the lubrication member wears away
Data Source
Figure 1~4
Figure 5~7
AI summary
The present invention is directed to a skin engaging member in the form of a narrow elongated strip of dimensions suitable for placement on a razor cartridge. The skin engaging member includes a first uppermost erodible layer, a second erodible layer positioned below the first layer and a third erodible layer positioned below the second layer. The first layer has a first color and includes a lubricious water-soluble polymer. The second layer has a second color different from said the color and includes a greater amount of lubricous water-soluble polymer, in percent by weight, than the first layer. The third layer has a third color different from the first color and the second layer and has a third thickness dimension.