Induction Heating Razor Cartridge Eliminates Wet Corrosion

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing razors face safety and malfunction risks due to electric heating in wet conditions, as they often require direct electrical connections that can lead to corrosion and leakage.

Innovation Solution

A razor assembly with an induction heating system that uses a handle-mounted induction coil to heat the razor cartridge non-contactually, eliminating direct electrical connections and reducing exposure to water, thereby enhancing safety and durability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If direct electrical connection is used for heating the razor cartridge, then heating function is achieved, but safety risk increases due to electric shock and corrosion in wet conditions

Engineering Contradiction:

Improvecartridge heating temperatureVSAvoidsafety in wet conditions

Core Design Contradiction:

TemperatureVSReliability

Solution Approach 1:

The patent replaces the direct electrical contact heating system with an induction heating system that uses electromagnetic fields to heat the cartridge. The induction coil generates a magnetic field that induces eddy currents in the conductive cartridge, producing heat without direct electrical connection, thereby eliminating corrosion and electric shock risks while maintaining effective heating capability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an induction coil as an intermediary between the power source and the cartridge. The coil converts electrical energy to electromagnetic energy, which then induces currents in the cartridge for heating. This intermediary mechanism allows energy transfer without direct electrical contact, solving the safety issue in wet environments

Inventive Principle:

Principle #24Intermediary (Mediator)

2Temperature

If direct electrical connection is used for heating, then heating function is achieved, but device durability decreases due to corrosion and leakage

Engineering Contradiction:

Improvecartridge heating temperatureVSAvoiddevice durability

Core Design Contradiction:

TemperatureVSDuration of action of stationary object

Solution Approach 1:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent extracts the electrical connection interface from the heating system by using induction heating. By removing the direct electrical contact between the handle and cartridge, the system eliminates the corrosion pathway that would otherwise degrade the device over time in wet shaving conditions

Inventive Principle:

Principle #2Taking out (Extraction)

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 induction heating system effectively heats the razor cartridge to a comfortable temperature for shaving, maintaining stability and safety by avoiding direct electrical connections and potential corrosion, ensuring a durable and safe shaving experience.

Implementation Method 1

at least one induction coil coupled to the PCB, wherein the at least one induction coil is configured to cause at least a portion of the cartridge to be heated in a non-contact manner

Methodology Applied

Scientific EffectInduction heating: Induction Heating

Implementation Method 2

at least one induction coil electrically coupled to the electric power source, wherein the at least one induction coil is configured to generate a magnetic force for heating at least a portion of the razor cartridge by induction heating

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentEP3792020B1Razor assembly for razor with induction heating system

Publication Date: 2023.07.26 DORCO CO LTD

Figure 1A
Figure 1B
Figure 2A

AI summary

Provided is a razor assembly including a cartridge including at least one blade and a handle assembly including an electric power source, a printed circuit board (PCB) electrically coupled to the electric power source, and at least one induction coil coupled to the PCB, wherein the at least one induction coil is configured to cause at least a portion of the cartridge to be heated in a non-contact manner, wherein the cartridge is detachably coupled to the handle assembly.