RF-Heated Razor Blades Without Electrical Contacts
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Solution Overview
Problem
Existing razor blade heating methods require electrical connections between the handle and blades, limiting their ability to maintain consistent heat throughout the shaving process.
Innovation Solution
A razor that uses RF energy to heat blades directly or indirectly, controlled by a circuit that monitors temperature and adjusts power levels to maintain a desired temperature range without physical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If electrical connections are used to heat blades continuously, then blade temperature can be maintained, but device complexity increases due to required conductors and electrical contacts
Solution Approach 1:
The patent extracts the heating function from the electrical connection system by using RF energy that can penetrate through the handle housing and directly heat the blades without requiring physical electrical contacts between the handle and blade cartridge. This separates the power transmission function from the heating function.
Solution Approach 2:
The patent introduces RF energy as an intermediary medium to transfer energy from the power source to the blades. The RF energy acts as a mediator that can pass through the handle housing and heating elements without requiring direct electrical contact, solving the complexity issue while maintaining heating capability.
2Device complexity
If RF energy is used to heat blades without electrical connections, then device complexity is reduced, but temperature control precision may be affected
Solution Approach 1:
The patent implements a feedback control system where a sensor detects the temperature of the blades or heating elements and provides feedback to the control circuit. The control circuit adjusts the RF power level based on this feedback to maintain the desired temperature, ensuring precise temperature control despite the wireless heating method.
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
Maintains blade temperature consistently, enhancing shaving performance and comfort by eliminating the need for electrical connections and allowing continuous heating.
Implementation Method 1
uses RF energy generated by a high frequency (HF) generator. The generated RF energy is amplified by a high frequency power amplifier
Implementation Method 2
The RF energy is radiated towards one or more heating elements that are in direct contact with the blades for transferring heat energy directly to the blades
Implementation Method 3
The RF energy is guided from the HF power amplifier to a resonance chamber by a wave guide. The resonance chamber is structured to radiate the RF energy towards the blades of the razor to heat the blades
Data Source
AI summary
A razor includes one or more blades that are directly or indirectly heated by RF energy. A control circuit is connected to and operates a high frequency (HF) generator and a HF power amplifier (HFPA) for generating radio frequency (RF) energy throughout a range of controllable power levels. The generated RF energy is guided by a wave guide from the HFPA to a resonance chamber (i.e., band pass filter cavity). The RF energy is radiated from the resonance chamber towards the one or more blades which absorb the RF energy, thereby causing the temperature of the blades to increase. An energy source provides the electric current required for operating the control circuit, the HF generator and the HFPA. In another embodiment, the RF energy is radiated from the resonance chamber towards a heating element that increases in temperature and heats the blades by thermal conduction.