Compressed Graphite Heat Dispersion Layer for Shaving Razor Face Plate
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Solution Overview
Problem
Existing heated razors for wet shaving have inefficient heat delivery due to minimal skin contact area, leading to safety concerns such as burning or discomfort.
Innovation Solution
A heat delivery element for shaving razors featuring a face plate with a heater track positioned between dielectric layers, a heat dispersion layer, and a compressible thermal insulation layer, which enhances heat distribution and minimizes heat loss, ensuring efficient and safe heating during shaving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heated blades are used in a razor cartridge, then the blade can deliver heat to the skin during shaving, but the minimal surface area in contact with the user's skin results in inefficient heating and safety concerns such as burning or discomfort
Solution Approach 1:
The patent transitions from linear heating (blade edge) to planar heating (face plate surface). The face plate is positioned in substantial contact with the user's skin during shaving, providing a two-dimensional heating surface that dramatically increases the effective heating area compared to the one-dimensional blade edge contact.
Solution Approach 2:
The patent introduces a face plate as an intermediary between the heating element and the user's skin. The face plate acts as a heat transfer medium that distributes heat evenly across a larger surface area, preventing concentrated heat points that could cause burning while maintaining effective heat delivery to the skin.
2Productivity
If more heat is delivered to the skin, then heating efficiency improves, but safety concerns such as burning or discomfort increase
Solution Approach 1:
The patent applies different thermal properties to different regions of the heating system. The face plate has high thermal conductivity for efficient heat delivery, while the dielectric layers provide thermal insulation where needed. This spatial variation in thermal properties allows efficient heating in contact areas while preventing heat loss and overheating in non-contact areas.
Solution Approach 2:
The patent uses a composite structure combining materials with different thermal properties: a conductive face plate for heat delivery, dielectric layers for insulation and electrical isolation, and adhesive layers for bonding. This composite approach enables simultaneous achievement of high heating efficiency and safety by directing heat where needed while blocking it where harmful.
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 solution provides a more efficient and safe heating mechanism, ensuring comfortable shaving with even heat distribution and reduced risk of burns, by maximizing heat transfer to the skin while minimizing heat loss and stray particulates.
Implementation Method 1
a heater having a heater track positioned between an upper dielectric layer and a lower dielectric layer
Implementation Method 2
A heat dispersion layer having a lower surface directly contacts the inner surface of the face plate. An upper surface of the heat dispersion layer directly contacts the lower dielectric layer of the heater
Implementation Method 3
a heater having a heater track positioned between an upper dielectric layer and a lower dielectric layer
Data Source
AI summary
A heat delivery element for a shaving razor with a face plate having a skin contacting surface and an opposing inner surface. A heater having a heater track is positioned between an upper dielectric layer and a lower dielectric layer. A heat dispersion layer having a lower surface directly contacts the inner surface of the face plate. An upper surface of the heat dispersion layer directly contacts the lower dielectric layer of the heater. The heat dispersion layer has graphite foil compressed by 20% to 50% of an original thickness.