CN112621821A - Heating razor blades using radio frequency energy - Google Patents
Heating razor blades using radio frequency energy Download PDFInfo
- Publication number
- CN112621821A CN112621821A CN202010044256.8A CN202010044256A CN112621821A CN 112621821 A CN112621821 A CN 112621821A CN 202010044256 A CN202010044256 A CN 202010044256A CN 112621821 A CN112621821 A CN 112621821A
- Authority
- CN
- China
- Prior art keywords
- blade
- radio frequency
- high frequency
- frequency energy
- razor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 33
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000008859 change Effects 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 10
- 230000004044 response Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 239000004020 conductor Substances 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 229910052733 gallium Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000002470 thermal conductor Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
- B26B21/40—Details or accessories
- B26B21/405—Electric features; Charging; Computing devices
- B26B21/4056—Sensors or controlling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
- B26B21/08—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor involving changeable blades
- B26B21/14—Safety razors with one or more blades arranged transversely to the handle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
- B26B21/40—Details or accessories
- B26B21/4012—Housing details, e.g. for cartridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
- B26B21/40—Details or accessories
- B26B21/405—Electric features; Charging; Computing devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
- B26B21/40—Details or accessories
- B26B21/48—Heating means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
- B26B21/40—Details or accessories
- B26B21/52—Handles, e.g. tiltable, flexible
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
- B26B21/54—Razor-blades
Abstract
The razor includes one or more blades that are heated directly or indirectly by radio frequency energy. The control circuit is coupled to and operates a high frequency generator and a High Frequency Power Amplifier (HFPA) to generate Radio Frequency (RF) energy throughout a range of controllable power levels. The generated radio frequency energy is guided by a waveguide from the high frequency power amplifier to a resonant cavity (i.e., a bandpass filter cavity). Radio frequency energy radiates from the resonant cavity to one or more blades, which absorb the radio frequency energy, causing the temperature of the blades to increase. The energy source provides the current required to operate the control circuit, the high frequency generator and the high frequency power amplifier. In another embodiment, radio frequency energy is radiated from the resonant cavity to a heating element that increases in temperature and heats the blade by thermal conduction.
Description
Technical Field
The present invention relates generally to razors for shaving, and more particularly, to a razor with one or more blades that are heated by radio frequency energy.
Background
It is well known that when the cutting edge of a razor blade is warm or hot, the cutting edge cuts hair more effectively. It is common practice to place razor blades in hot water to heat the blades before flicking the blades across the skin to shave off hair. However, the thermal cutting performance of the blades lasts only a short time at the beginning of the shaving process. Within a few seconds, the temperature of the skin surface, hair and blades rapidly decreases due to exposure to the air environment. Ideally, it is desirable to keep the blades, including the cutting edges of the blades, heated to a warm temperature throughout shaving to achieve better performance and increased shaving comfort.
One typical prior art technique for blade heating: U.S. patent 6,817,101B1 to Bohmer provides a razor with a blade that is continuously heated throughout the shaving process. In the Bohmer patent, the blade is heated by applying a certain amount of current to the blade through conductors attached to both sides of the blade holder and extending in contact at the junction of the blade holder and the razor handle. The current is supplied by a primary battery housed in a battery compartment in the razor handle. The current passing through the blade generates heat in the blade. The magnitude of the heat can be adjusted by a resistor in series with the blade and the tool holder. A switch closes the circuit to allow current to flow through the blade.
Patrick, U.S. Pat. No.6,836,966, discloses a heated razor having a heating element bonded to the bottom of the razor blade. The heating element is activated by an electric current and generates heat which is transferred to the blade by thermal conduction. Patrick requires an electrical connection between a battery power source in the handle of the razor and the heating element connected to the blade by a wire conductor.
The present invention eliminates the need to have an electrical connection between the battery power source in the handle of the razor and the heating element, which may be disposed in contact with or near the blade. In particular, the present invention uses radio frequency energy generated by a High Frequency (HF) generator. The generated radio frequency energy is amplified by a high frequency power amplifier. Radio frequency energy is directed from the high frequency power amplifier to the resonant cavity through the waveguide. The resonant cavity is configured to radiate radio frequency energy to a blade of the razor to heat the blade. Or radiating rf energy onto one or more heating elements in direct contact with the blade to transfer the thermal energy directly to the blade. The present invention therefore overcomes the problems and disadvantages associated with the need to have an electrical connection between a power source in a razor handle and a heating element on the blade or blade carrier.
Disclosure of Invention
The present invention relates to a razor comprising one or more blades that are directly or indirectly heated by radio frequency energy. A control circuit in the razor handle operates a High Frequency (HF) generator and a High Frequency Power Amplifier (HFPA) for generating Radio Frequency (RF) energy throughout a range of controllable power levels. The energy source provides the current required to operate the control circuit, the high frequency generator and the high frequency power amplifier. The energy source comprises one or more batteries in the handle of the razor. The battery source in the razor handle may be rechargeable.
In one embodiment, radio frequency energy is directed from a high frequency power amplifier into a resonant cavity (i.e., a bandpass filter cavity) via a waveguide and radiates from the resonant cavity toward a blade made of a material having a known curie temperature. The control circuit measures the Standing Wave Ratio (SWR) and constantly monitors the change in the standing wave ratio. As the blades absorb high frequency energy, they heat up. As the blade temperature approaches the curie temperature of the blade material, the electromagnetic properties change, thus changing the high frequency energy absorption rate, which is in turn indicated by a change in the standing wave ratio. In response, the control circuit reduces the power of the generated rf energy. As the blade cools, further away from the curie temperature. The high frequency energy absorption rate is continuously improved, which can be represented by the change of the standing wave ratio. In response, the control circuit increases the power of the generated RF energy to maintain the blade at the desired temperature
In another embodiment, high frequency energy is directed from a high frequency power amplifier into a resonant cavity via a waveguide and radiated from the resonant cavity toward one or more heating elements made of a material with a known curie temperature. The one or more heating elements are thermally coupled to the blade by direct contact or by thermal conductors attached to the one or more heating elements and the blade. The change in standing wave ratio is monitored.
When one or more heating elements absorb high frequency energy, it heats up. As the temperature of the heating element approaches the curie temperature of the blade material, the electromagnetic properties change, thereby changing the absorption rate of the high frequency energy. The high frequency energy absorption is indicated by a changed standing wave ratio. In response, the control circuit reduces the power of the generated rf energy. As the heating element cools, and thus moves further away from the curie temperature, the rate of absorption of high frequency energy increases, which in turn is reflected by a change in the standing wave ratio. In response, the control circuit increases the power of the generated RF energy to maintain the heating element and thus the blade within a desired temperature range.
Objects and advantages of the invention
In view of the prior art, it is a primary object of the present invention to provide a wet shaving razor for shaving comprising one or more blades that are heated by radio frequency energy without the need for wire conductors or other physical connections between the handle power supply and the razor cartridge.
It is a further object of the present invention to provide a wet razor having one or more blades that are directly heated to a desired temperature range by radio frequency energy without the need for wire conductors or other electrical contacts between the handle power supply and the razor cartridge for heating.
It is a further object of the present invention to provide a wet razor having one or more blades that are indirectly heated to a desired temperature range by radio frequency energy without the need for wire conductors or other electrical contacts between the handle power supply and the razor cartridge for heating.
It is a further object of the invention to provide a wet shaving razor for shaving comprising one or more blades which are heated directly or indirectly by radio frequency energy and which includes a control circuit to monitor the blade temperature (or the temperature of the heating element) and to control the generation and amplification of the radio frequency energy to bring the blades to a suitable temperature.
It is a further object of the present invention to provide a wet shaver for shaving comprising one or more blades heated by radio frequency energy and wherein the shaver comprises a control circuit and an energy storage source and wherein the control circuit monitors the level of energy provided by the energy storage source to estimate a disposable power limit.
Drawings
These and other objects and advantages of the present invention will become more apparent with reference to the following detailed description and the accompanying drawings.
Brief description of the drawingsfor a fuller understanding of the nature of the present invention, reference should be made to the following detailed description taken together with the accompanying figures.
Wherein:
fig. 1 is a schematic view of a razor according to one embodiment of the invention, and shows the major components therein.
Fig. 2 is a schematic view of the razor of fig. 1, further illustrating internal components thereof.
FIG. 3 is an isolated perspective top view of the resonant cavity of a razor of the present invention, an
Fig. 4 is a schematic view of a razor according to another embodiment of the invention, and showing the major components.
Like reference numerals refer to like components and parts throughout the several views of the drawings.
Detailed Description
First, fig. 1 shows a first embodiment of the present invention. The embodiment of fig. 1 is directed to a razor 10A having one or more blades 40, the blades 40 being directly heated by radio frequency energy. Razor 10A includes a housing 20, the housing 20 being formed and configured to provide a handle 22 and an integral neck 24. Attached to the distal end of the neck 24 is a blade holder 30 having one or more blades 40. As shown in fig. 1, a control circuit 101 in the housing 20 of the razor is directly or bidirectionally indirectly coupled to a High Frequency (HF) generator 102 and a High Frequency Power Amplifier (HFPA) 104.
The control circuit 101 operates a high frequency generator 102 that generates RF energy. The control circuit 101 also operates a high frequency power amplifier 104, which high frequency power amplifier 104 amplifies radio frequency energy over a range of controllable power levels. More specifically, the control circuit 101 provides a plurality of control signals required to operate the high-frequency generator 102 and the high-frequency power amplifier 104. These control signals include, but are not limited to, signals that control the following functions: enable, power limit and modulation frequency. In turn, the control circuit 101 obtains a plurality of status signals from the high frequency generator 102 and the high frequency power amplifier 104. These status signals include, but are not limited to, signals indicating: a locked phase-locked loop (PLL), a measured Standing Wave Ratio (SWR), power consumption, and tuning coefficients. The energy storage source 100 provides the current required to operate the control circuit 101, the high frequency generator 102 and the high frequency power amplifier 104. In a preferred embodiment, the energy source 100 includes one or more
A battery contained in the razor handle. The one or more batteries may be rechargeable.
Referring to fig. 1-2, RF energy is directed from the high frequency power amplifier 104 into the resonant cavity 110 (i.e., the band pass filter cavity) via the waveguide 106 and radiates from the resonant cavity toward the blade 40, which is made of a material having a known curie temperature. In at least one embodiment, the radio frequency energy directed into the resonant cavity 110 has a frequency range between 12MHz and 15 MHz. The control circuit 101 measures the Standing Wave Ratio (SWR) and continuously monitors the change in the standing wave ratio. The standing-wave ratio is determined according to the following formula:
pr is the reflected radio frequency power-a measure of the power of the reflected (i.e., from the cavity) radio frequency signal.
Pf is the forward rf power-the power measurement of the forward (i.e., into the cavity) rf signal.
As the blades 40 absorb the high frequency energy, they heat up. As the blade temperature approaches the curie temperature of the blade material, the electromagnetic properties change, changing the high frequency energy absorption rate, which is in turn indicated by the change in the standing wave ratio. In response, the control circuit 101 reduces the power of the generated radio frequency energy. As the blade 40 cools, further away from the curie temperature, the rate of high frequency energy absorption increases, which in turn is indicated by a changing standing wave ratio. In response, the control circuit increases the power of the generated rf energy to maintain the blade 40 at the desired temperature. For example, when water, skin, and/or other elements come into contact with the blade 40, the temperature of the blade 40 inherently deviates from the preset curie temperature, which in turn increases the measured standing wave ratio, which instructs the control circuit 101 to increase the power limit to the high frequency power amplifier 104 to raise the temperature of the blade 40 closer to the curie temperature, at which point the process is repeated. The control circuit 101 additionally monitors the energy level provided by the power supply 100 in order to estimate the power limit available for treatment.
Fig. 2 shows a second embodiment of the invention for a razor 10 having one or more blades 40, the blades 40 being indirectly heated by radio frequency energy. The resonant cavity 110 directs the radiated radio frequency energy onto one or more heating elements 50 spaced apart from the resonant cavity 110. The one or more heating elements 50 have a preset or known curie temperature. The one or more heating elements 50 are thermally coupled to the one or more blades 40 to transfer thermal energy directly to the blades 40 of the razor.
The stored energy source provides the current required to operate the control circuit 101, the high frequency generator 102 and the high frequency power amplifier 104. Changes in standing wave ratio are monitored. When one or more of the heating elements 50 absorbs high frequency energy, the heating elements heat up. When the temperature of the one or more heating elements 50 approaches the curie temperature of the blade material,
the electromagnetic properties change, thereby changing the high frequency energy absorption rate, which is in turn represented by a changing standing wave ratio. In response, the control circuit 101 reduces the power of the generated radio frequency energy. As the one or more heating elements 50 cool, further away from the curie temperature, the high frequency energy absorption rate increases, which is in turn represented by a changing standing wave ratio. In response, the control circuit increases the power of the generated rf energy to maintain the heating element and, to an extent, the blade at a desired temperature.
In another embodiment of the present invention, the blade 40 may include a ceramic material on at least one surface of the blade (e.g., on the bottom surface) to enhance the absorption and heating of the blade to radio frequency energy. An example of a ceramic material is a gallium-based (Ga) ceramic, which may include gallium and arsenic (GaAs) or gallium and indium (GaIn). While the invention has been shown and described in terms of several preferred and practical embodiments, it should be recognized that departures can be made therefrom within the spirit and scope of the invention, which is to be limited only by the claims which follow, and the doctrine of equivalents should be construed as broadly as possible.
Claims (5)
1. A razor, comprising:
a housing including a handle and a neck.
A blade holder attached to the neck and including at least one blade; a control circuit contained within the housing;
a high frequency generator housed within the housing and operated by the control circuit to generate radio frequency energy;
a high frequency power amplifier contained within the housing and operated by the control circuit and configured to receive radio frequency energy from the high frequency generator and amplify the radio frequency energy over a range of controllable power levels;
a waveguide for receiving the generated and amplified radio frequency energy; and
a resonant cavity for receiving the amplified radio frequency from the waveguide and located in the neck of the razor housing and spaced from the blade holder and the at least one blade, and further configured for directing application of the amplified radio frequency energy to the at least one blade to raise the temperature of the at least one blade.
2. A razor as claimed in claim 1, wherein the control circuit is constructed and arranged to monitor the temperature of the at least one blade, and when the temperature of at least one blade drifts below a predetermined temperature, the control circuit is further constructed and arranged to increase the power limit to the high frequency generator and the high frequency power amplifier to trigger the high frequency power amplifier to generate a higher power level of radio frequency energy that is emitted from the resonant cavity to effectively increase the temperature of the at least one blade to maintain the temperature of the at least one blade within a desired temperature range.
3. The razor of claim 2, wherein the razor comprises a plurality of blades.
4. The razor of claim 3, wherein the resonant cavity is configured to direct amplified radiofrequency energy onto the plurality of blades to cause a temperature increase of the plurality of blades.
5. A razor, comprising:
a housing including a handle and a neck.
A blade holder attached to the neck and including at least one blade;
at least one heating element thermally coupled to at least one blade;
a control circuit contained within the housing;
a high frequency generator contained within the housing and operated by the control circuit to generate radio frequency energy;
a high frequency power amplifier contained within the housing and operated by the control circuit and configured to receive the radio frequency energy from the high frequency generator and amplify the radio frequency energy over a range of controllable power levels;
a waveguide for receiving the generated and amplified radio frequency energy; and
a resonant cavity for receiving the amplified radio frequency from the waveguide, the resonant cavity being located in the neck of the razor housing and spaced from the blade holder and the at least one blade, and being further constructed and arranged for directing the amplified radio frequency energy onto at least one heating element to cause a temperature increase of the at least one heating element and, by thermal coupling with the at least one heating element, the temperature of the at least one blade.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16/580,740 | 2019-09-24 | ||
| US16/580,740 US11052557B2 (en) | 2016-11-04 | 2019-09-24 | Heating blades of razor using RF energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112621821A true CN112621821A (en) | 2021-04-09 |
Family
ID=69626243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010044256.8A Pending CN112621821A (en) | 2019-09-24 | 2020-01-15 | Heating razor blades using radio frequency energy |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20210036286A (en) |
| CN (1) | CN112621821A (en) |
| DE (1) | DE102020200407A1 (en) |
| GB (1) | GB2587441B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133576A (en) * | 1993-09-22 | 1996-10-16 | 吉莱特公司 | Method of applying polymers to razor blade cutting edges |
| US20060026841A1 (en) * | 2004-08-09 | 2006-02-09 | Dirk Freund | Razors |
| US20110167640A1 (en) * | 2010-01-08 | 2011-07-14 | Lion Flyash | Skin-heating shaving apparatus and method |
| US20180126572A1 (en) * | 2016-11-04 | 2018-05-10 | Heated Blades Holding Company, Llc | Heating blades of razor using rf energy |
| WO2018136284A1 (en) * | 2017-01-20 | 2018-07-26 | The Gillette Company Llc | Heating delivery element for a shaving razor |
| CN109352688A (en) * | 2018-10-25 | 2019-02-19 | 谢乒 | A kind of shaver of heating |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3351359B1 (en) * | 2017-01-20 | 2021-06-16 | The Gillette Company LLC | Heating member for a shaving razor |
-
2020
- 2020-01-14 DE DE102020200407.2A patent/DE102020200407A1/en active Pending
- 2020-01-14 GB GB2000510.4A patent/GB2587441B/en active Active
- 2020-01-15 CN CN202010044256.8A patent/CN112621821A/en active Pending
- 2020-09-23 KR KR1020200123354A patent/KR20210036286A/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133576A (en) * | 1993-09-22 | 1996-10-16 | 吉莱特公司 | Method of applying polymers to razor blade cutting edges |
| US20060026841A1 (en) * | 2004-08-09 | 2006-02-09 | Dirk Freund | Razors |
| US20110167640A1 (en) * | 2010-01-08 | 2011-07-14 | Lion Flyash | Skin-heating shaving apparatus and method |
| US20180126572A1 (en) * | 2016-11-04 | 2018-05-10 | Heated Blades Holding Company, Llc | Heating blades of razor using rf energy |
| WO2018136284A1 (en) * | 2017-01-20 | 2018-07-26 | The Gillette Company Llc | Heating delivery element for a shaving razor |
| CN109352688A (en) * | 2018-10-25 | 2019-02-19 | 谢乒 | A kind of shaver of heating |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102020200407A1 (en) | 2021-03-25 |
| GB202000510D0 (en) | 2020-02-26 |
| GB2587441A (en) | 2021-03-31 |
| KR20210036286A (en) | 2021-04-02 |
| GB2587441B (en) | 2023-10-11 |
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