Hydrochromic Shaving Cartridge Adaptor for Dryness Indication
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Solution Overview
Problem
Existing razors face issues with residual water leading to unwanted effects such as leaching of shaving aids, rust development, and bacterial/mold growth, which affect shaving performance and hygiene, and require a solution to indicate when the razor is dry for safe storage.
Innovation Solution
An adaptor for a shaving cartridge featuring a frame with a hydrochromic material layer that changes appearance in the presence of water and a hydrophobic layer to reduce water absorption, indicating dryness for safe storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the razor is stored wet, then the user can conveniently store the razor immediately after use, but this leads to rust development, bacterial growth, and degradation of shaving performance
Solution Approach 1:
The adaptor incorporates a hydrochromic material that changes color from blue (indicating wet state) to green (indicating dry state), providing visual feedback to users about the razor's moisture status and guiding proper storage timing
Solution Approach 2:
The hydrochromic material provides real-time feedback to users about the razor's moisture condition, enabling informed decisions about when to store the razor to maintain both convenience and hygiene
2Loss of information
If a hydrochromic layer is added to indicate moisture status, then the user is informed about dryness for safe storage, but the device complexity increases
Solution Approach 1:
The hydrochromic material provides moisture status information through color change (blue to green) without requiring electronic sensors, displays, or complex control systems
Solution Approach 2:
The hydrochromic material automatically indicates the razor's moisture state without user intervention or external power sources, providing self-monitoring functionality
3Device complexity
If the hydrochromic layer is made thin for minimal complexity, then the adaptor remains simple, but the water indication response time is slow
Solution Approach 1:
The adaptor combines a thin hydrochromic polymer layer with a hydrophobic coating, creating a composite structure that maintains simplicity while optimizing water detection responsiveness through the synergistic properties of the material combination
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 adaptor quickly indicates when the razor is dry, preventing rust and bacterial growth, enhancing shaving performance and hygiene by ensuring proper storage.
Implementation Method 1
a first layer (32) comprising a hydrochromic material, located on top of the upper surface (5) of the frame (3), wherein the first layer (32) reversibly changes appearance from a first state in the absence of water to a second state in the presence of water
Implementation Method 2
a second layer (33) comprising a hydrophobic material, located on top of the first layer (32)
Data Source
Figure 1~2
AI summary
The present invention relates to an adaptor (1) for a shaving cartridge (2) comprising a frame (3) configured to surround a shaving cartridge (2) having at least one shaving blade (4) being provided with a cutting edge (4a), the adaptor (1) being mountable on the shaving cartridge (2), wherein the frame (3) has an upper surface (5), and the adaptor (1) further comprising: a first layer (32) comprising a hydrochromic material, located on top of the upper surface (5) of the frame (3), wherein the first layer (32) reversibly changes appearance from a first state in the absence of water to a second state in the presence of water; and a second layer (33) comprising a hydrophobic material, located on top of the first layer (32). The present invention further relates to a shaving assembly comprising said adaptor, to a razor and to a kit of parts. The present invention further relates to a method for manufacturing the adaptor (1).