CN217409571U - Radio frequency circuit applied to constant power of beauty instrument - Google Patents
Radio frequency circuit applied to constant power of beauty instrument Download PDFInfo
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- CN217409571U CN217409571U CN202120245649.5U CN202120245649U CN217409571U CN 217409571 U CN217409571 U CN 217409571U CN 202120245649 U CN202120245649 U CN 202120245649U CN 217409571 U CN217409571 U CN 217409571U
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Abstract
The utility model relates to an electronic circuit technical field especially relates to a be applied to cosmetic appearance constant power's radio frequency circuit, including radio frequency circuit supply circuit, radio frequency power drive circuit and radio frequency selection circuit and impedance matching circuit, radio frequency circuit supply circuit's output is connected with radio frequency power drive circuit, and radio frequency power drive circuit's output is connected with radio frequency selection circuit and impedance matching circuit. The utility model provides a be applied to beauty instrument constant power's radio frequency circuit comes the output of automatically regulated RF radio frequency ripples according to the skin state of difference, effectively avoids the difference on the use impression that human skin impedance difference brought, improves the uniformity of using the impression, reduces uncomfortable sense, brings better cosmetic effect for the user of different skin types.
Description
Technical Field
The utility model relates to an electronic circuit technical field especially relates to a be applied to cosmetic appearance constant power's radio frequency circuit.
Background
At present, more and more beauty products are on the market, wherein the radio frequency beauty instrument belongs to one type of small beauty instruments, the radio frequency beauty instrument can improve and tighten skin, remove wrinkles and thin face, and improve and tighten drooping or loose skin, the radio frequency beauty instrument replaces beauty modes such as laser, IPL and the like in many aspects, and can be applied to aspects such as stretching skin wrinkles, fading scars, recovering skin elasticity and luster, dissolving fat, slimming and the like based on radio frequency technology.
The radio frequency beauty instrument works by generating RF (radio frequency) radio waves to penetrate the skin and act on subcutaneous tissues. The radio frequency microwave generated by the RF circuit can make cell molecules generate strong resonance motion to generate heat energy, so that the purposes of heating subcutaneous collagen tissues and fat cells are achieved, the temperature of the bottom layer of the skin is gradually increased, and the dermis layer is stimulated to generate the principle of collagen tightening and regeneration. The radio frequency beauty instrument is abstracted into a circuit, skin and subcutaneous tissues are loads of the RF circuit, the power loaded on the loads is higher, the generated heat energy speed is higher, the temperature is higher, and the beauty effect is more obvious.
Because the human body is a conductor model with large difference, and the skin surface is often influenced by temperature and environment, the humidity degree also has large difference, even if the same person, the human body impedance also has large difference at different times, and by combining the working mode of the radio frequency beauty instrument, different people can have large difference for the same radio frequency beauty instrument, for example, the temperature rises slowly or even feels nothing, or the temperature rises quickly or even gets overheated to cause burn. Even the same person, the skin used or applied to different places at different times feels very different. The radio frequency beauty instruments in the market basically do not consider the matching problem of different human body impedances.
To this problem, the utility model provides a be applied to radio frequency circuit of beauty instrument constant power comes the output of automatically regulated RF radio frequency wave according to the skin condition of difference, effectively avoids the difference on the use impression that human skin impedance difference brought, improves the uniformity of using the impression, reduces uncomfortable sense, brings better cosmetic effect for the user of different skin qualities.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a be applied to cosmetic instrument constant power's radio frequency circuit.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a radio frequency circuit applied to constant power of a beauty instrument comprises a radio frequency circuit power supply circuit, a radio frequency power driving circuit, a radio frequency selection circuit and an impedance matching circuit, wherein the output end of the radio frequency circuit power supply circuit is connected with the radio frequency power driving circuit, and the output end of the radio frequency power driving circuit is connected with the radio frequency selection circuit and the impedance matching circuit;
the radio frequency circuit power supply circuit consists of a power supply V2, an inductor L12 and a capacitor C24;
the radio frequency power driving circuit is composed of a capacitor C9, a capacitor C10, a capacitor C21, a capacitor C22, a diode D7, a diode D8, a resistor R57, a resistor R58, a resistor R59, a resistor R60, a resistor R61, a resistor R71, a MOS tube M3, a MOS tube M4 and a transformer K1;
the radio frequency selection circuit and the impedance matching circuit are composed of a capacitor C20, an inductor L8, an inductor L13, a resistor R73 and a resistor R74.
Preferably, in the radio frequency power driving circuit, an output end of a positive electrode of a power supply V2 is connected with an inductor L12, an output end of L12 is connected with a capacitor C24 to form an LC circuit for suppressing interference of radio frequency to the power supply, output ends of the capacitor C9 and the capacitor C10 are respectively connected with a MOS transistor M3 and a MOS transistor M4, and a resistor R58, a resistor R57, a resistor R59 and a resistor R60.
Preferably, in the radio frequency power driving circuit, one end of the resistor R58 is connected to the positive electrode VCC of the power supply, the resistor R57 and the diode D7 are connected in parallel to the negative electrode GND of the power supply, one end of the resistor R59 is connected to the positive electrode VCC of the power supply, the resistor R60 and the diode D8 are connected in parallel to the negative electrode GND of the power supply, and the MOS transistor M3 and the MOS transistor M4 are connected.
Preferably, in the radio frequency power driving circuit, the diode D7 and the diode D8 are schottky diodes, the drains of the MOS transistor M3 and the MOS transistor M4 are connected to the primary winding of the transformer K1, and the MOS transistor M3 and the MOS transistor M4 are N-channel MOSFETs.
Preferably, in the radio frequency power driving circuit 2, the capacitor C9 and the capacitor C10 play a role of blocking dc in the radio frequency power driving circuit, the resistor R57, the resistor R58, the diode D7, the resistor R59, the resistor R60, and the diode D8 form a DR network to improve the driving capability of driving the gates of the MOS transistor M3 and the MOS transistor M4, the resistor R61, the capacitor C21, the resistor R71, and the capacitor C22 form an RC spike absorption circuit, and the single chip outputs radio frequency PWM pulses to control the push-pull radio frequency driving circuit formed by the MOS transistor M3, the MOS transistor M4, and the transformer.
Preferably, in the radio frequency selective circuit and the impedance matching circuit, a secondary output pin of the transformer is connected to the capacitor C20, and an output end of the capacitor C20 is connected to the inductor L8.
Preferably, in the radio frequency selective circuit and the impedance matching circuit, the inductor L8 is connected to a resistor R73 to the secondary input pin of the transformer, and is connected to a resistor R74.
Preferably, in the radio frequency selection circuit and the impedance matching circuit, an output terminal of the resistor R74 is connected with a point inductor L13 to a secondary input pin of the transformer.
Preferably, in the radio frequency selection circuit and the impedance matching circuit, the capacitor C20, the inductor L8 and the resistor R73 form an LCR series resonant circuit, the inductor L13 and the human body equivalent impedance human body form a parallel resonant circuit, and the power of the transformer K1 is output to the human skin equivalent load and power adjustment is performed with respect to different human body loads.
The utility model discloses possess following beneficial effect at least:
the utility model discloses a low-cost circuit carries out the circuit matching with the impedance of radio frequency circuit and skin for the radio frequency power automatically regulated who acts on skin, under the human skin impedance condition of difference, the radio frequency energy of output constant power, to the user, no matter its skin is moist dry, no matter also man and woman old and young, the homoenergetic obtains unanimous use impression and experience.
The utility model discloses a be applied to radio frequency circuit of beauty instrument constant power realizes the output power who comes the automatically regulated RF radio frequency ripples to the skin state of difference, compares the radio frequency beauty instrument on the market, brings better cosmetic effect for the user of different skin types. Can effectively match different human body surface impedances and has wide adaptability.
The utility model discloses a be applied to cosmetic appearance constant power's radio frequency circuit has very big cost advantage owing to used MOS pipe, diode, resistance, electric capacity, inductance, transformer and simple electronic component.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.
Fig. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a schematic diagram of a simulated waveform of RF output power for simulating a dry condition of a human skin load;
fig. 3 is a schematic diagram of a simulated waveform of the radio frequency output power under the condition of simulating the human skin load in the wet condition.
In the figure: 1. a radio frequency circuit power supply circuit; 2. a radio frequency power drive circuit; 3. a radio frequency selection circuit and an impedance matching circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-3, a radio frequency circuit applied to constant power of a beauty instrument comprises a radio frequency circuit power supply circuit 1, a radio frequency power driving circuit 2, a radio frequency selection circuit and an impedance matching circuit 3, wherein the output end of the radio frequency circuit power supply circuit 1 is connected with the radio frequency power driving circuit 2, and the output end of the radio frequency power driving circuit 2 is connected with the radio frequency selection circuit and the impedance matching circuit 3;
the radio frequency circuit power supply circuit 1 comprises a power supply V2, an inductor L12 and a capacitor C24;
the radio frequency power driving circuit 2 is composed of a capacitor C9, a capacitor C10, a capacitor C21, a capacitor C22, a diode D7, a diode D8, a resistor R57, a resistor R58, a resistor R59, a resistor R60, a resistor R61, a resistor R71, a MOS tube M3, a MOS tube M4 and a transformer K1;
the radio frequency selection circuit and the impedance matching circuit 3 are composed of a capacitor C20, an inductor L8, an inductor L13, a resistor R73 and a resistor R74.
The scheme has the following working processes:
the single chip microcomputer outputs radio frequency PWM signals, the driving capability is increased through an inductance L8DR circuit after the radio frequency PWM signals pass through blocking capacitors C9 and C10, a push-pull type radio frequency driving circuit formed by M3 and M4 and a primary side of a transformer is controlled, after the energy conversion of the transformer, radio frequency energy output by a secondary side of the transformer passes through a frequency selection circuit and an impedance matching circuit formed by an inductance L13LCR series resonance circuit, the radio frequency energy is output to a human skin equivalent model, and power distribution is carried out according to different equivalent impedances, so that the output power is kept constant, the cost is low, and the wide adaptability is realized;
wherein, fig. 2 and fig. 3 are simulation graphs of the radio frequency circuit applied to the constant power of the beauty instrument; wherein, fig. 2 shows that the total power of the human body is measured as the following figure 2 under the condition that the skin load of the simulated human body is dry: w (R66) + W (R72); wherein, fig. 3 shows that the total power of the human body is measured as fig. 3 when the skin load of the simulated human body is dry: w (R66) + W (R72), the total power is basically equal and meets the requirement.
According to the working process, the following steps are known:
the radio frequency driving circuit 2 is mainly characterized in that a capacitor C9 and a capacitor C10 play a blocking role, a resistor R57, a resistor R58, a diode D7, a resistor R59, a resistor R60 and a diode D8 form a DR network to improve the driving capability of driving M3 and a grid electrode of M4, a resistor R61 and a capacitor C21, a resistor R71 and a capacitor C22 form an RC peak absorption circuit, and a single chip microcomputer outputs radio frequency PWM (pulse width modulation) pulses to control a push-pull type radio frequency driving circuit formed by an MOS (metal oxide semiconductor field effect transistor) M3, an MOS M4 and a transformer.
Further, in the rf power driving circuit 2, an output end of a positive electrode of the power supply V2 is connected with an inductor L12, an output end of L12 is connected with a capacitor C24, which forms an LC circuit for suppressing interference of rf to the power supply, and output ends of the capacitor C9 and the capacitor C10 are connected with a MOS transistor M3 and a MOS transistor M4, and are connected with a resistor R58, a resistor R57, a resistor R59, and a resistor R60, respectively.
Furthermore, in the rf power driving circuit 2, one end of the resistor R58 is connected to the power supply anode VCC, the resistor R57 and the diode D7 are connected in parallel to the power supply cathode GND, one end of the resistor R59 is connected to the power supply anode VCC, and the resistor R60 and the diode D8 are connected in parallel to the power supply cathode GND, and are connected to the MOS transistor M3 and the MOS transistor M4.
Further, in the rf power driving circuit 2, the diode D7 and the diode D8 are schottky diodes, the drains of the MOS transistor M3 and the MOS transistor M4 are connected to the primary winding of the transformer K1, and the MOS transistor M3 and the MOS transistor M4 are N-channel MOSFETs.
Further, in the radio frequency power driving circuit 2, the capacitor C9 and the capacitor C10 play a role in blocking dc, the resistor R57, the resistor R58, the diode D7, the resistor R59, the resistor R60, and the diode D8 form a DR network to improve the driving capability of driving the gates of the MOS transistor M3 and the MOS transistor M4, the resistor R61, the capacitor C21, the resistor R71, and the capacitor C22 form an RC spike absorption circuit, and the single chip outputs radio frequency PWM pulses to control the push-pull type radio frequency driving circuit formed by the MOS transistor M3, the MOS transistor M4, and the transformer.
Further, in the radio frequency selective circuit and the impedance matching circuit 3, a secondary output pin of the transformer is connected to the capacitor C20, and an output end of the capacitor C20 is connected to the inductor L8.
Further, in the rf frequency-selective circuit and the impedance matching circuit 3, the inductor L8 is connected to a resistor R73 to the secondary input pin of the transformer, and is connected to a resistor R74.
Furthermore, in the radio frequency selection circuit and the impedance matching circuit 3, the output end of the resistor R74 is connected with a point inductor L13 to the secondary input pin of the transformer.
Further, in the radio frequency selection circuit and impedance matching circuit 3, the capacitor C20, the inductor L8 and the resistor R73 form an LCR series resonance circuit, the inductor L13 and the human body equivalent impedance human body form a parallel resonance circuit, and the power of the transformer K1 is output to the human skin equivalent load and power adjustment is performed with respect to different human body loads.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A radio frequency circuit applied to constant power of a beauty instrument comprises a radio frequency circuit power supply circuit (1), a radio frequency power driving circuit (2), a radio frequency selection circuit and an impedance matching circuit (3), and is characterized in that the output end of the radio frequency circuit power supply circuit (1) is connected with the radio frequency power driving circuit (2), and the output end of the radio frequency power driving circuit (2) is connected with the radio frequency selection circuit and the impedance matching circuit (3);
the radio frequency circuit power supply circuit (1) consists of a power supply V2, an inductor L12 and a capacitor C24;
the radio frequency power driving circuit (2) is composed of a capacitor C9, a capacitor C10, a capacitor C21, a capacitor C22, a diode D7, a diode D8, a resistor R57, a resistor R58, a resistor R59, a resistor R60, a resistor R61, a resistor R71, an MOS tube M3, an MOS tube M4 and a transformer K1;
the radio frequency selection circuit and the impedance matching circuit (3) are composed of a capacitor C20, an inductor L8, an inductor L13, a resistor R73 and a resistor R74.
2. The radio frequency circuit for constant power of beauty instrument according to claim 1, characterized in that in said radio frequency power driving circuit (2), the output terminal of the positive pole of the power source V2 is connected with the inductor L12, and the output terminal of L12 is connected with a capacitor C24, forming an LC circuit for suppressing the interference of radio frequency to the power source, the output terminals of the capacitor C9 and the capacitor C10 are connected with the MOS transistor M3 and the MOS transistor M4, respectively, and the resistor R58, the resistor R57, the resistor R59 and the resistor R60.
3. The radio frequency circuit for constant power of beauty instrument according to claim 1, wherein in the radio frequency power driving circuit (2), a resistor R58 is connected to the positive power supply electrode VCC at one end, a resistor R57 is connected to the negative power supply electrode GND in parallel with a diode D7, a resistor R59 is connected to the positive power supply electrode VCC at one end, a resistor R60 is connected to the negative power supply electrode GND in parallel with a diode D8, and a MOS transistor M3 and a MOS transistor M4 are connected.
4. The radio frequency circuit for constant power of beauty instrument according to claim 1, wherein in said radio frequency power driving circuit (2), diode D7 and diode D8 are schottky diodes, the drains of MOS transistor M3 and MOS transistor M4 are connected to the primary winding of transformer K1, and MOS transistor M3 and MOS transistor M4 are N-channel MOSFETs.
5. The radio frequency circuit with constant power applied to the beauty instrument as claimed in claim 1, wherein in the radio frequency power driving circuit (2), the capacitor C9 and the capacitor C10 play a role of blocking direct current, the resistor R57, the resistor R58, the diode D7, the resistor R59, the resistor R60, and the diode D8 constitute a DR network to improve the driving capability of driving the gates of the MOS transistor M3 and the MOS transistor M4, the resistor R61, the capacitor C21, the resistor R71, and the capacitor C22 constitute a peak RC absorption circuit, and the single chip outputs radio frequency PWM pulse to control a push-pull type radio frequency driving circuit composed of the MOS transistor M3, the MOS transistor M4, and the transformer.
6. The radio frequency circuit with constant power for beauty instrument according to claim 1, wherein the secondary output pin of the transformer is connected to the capacitor C20, and the output terminal of the capacitor C20 is connected to the inductor L8 in the radio frequency selection circuit and impedance matching circuit (3).
7. The rf circuit for constant power of beauty instrument according to claim 1, wherein the rf frequency-selecting circuit and impedance matching circuit (3) has an inductor L8 connected with a resistor R73 to the secondary input pin of the transformer and a resistor R74.
8. The radio frequency circuit for constant power of beauty instrument according to claim 1, wherein in the radio frequency circuit and impedance matching circuit (3), the output terminal of the electric group R74 is connected with a point inductance L13 to the secondary input pin of the transformer.
9. The radio frequency circuit applied to the constant power of the beauty instrument is characterized in that in the radio frequency selection circuit and the impedance matching circuit (3), a capacitor C20, an inductor L8 and a resistor R73 form an LCR series resonance circuit, an inductor L13 and a human body equivalent impedance human body form a parallel resonance circuit, and the power of a transformer K1 is output to human body skin equivalent loads and is adjusted relative to different human body loads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120245649.5U CN217409571U (en) | 2021-01-28 | 2021-01-28 | Radio frequency circuit applied to constant power of beauty instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120245649.5U CN217409571U (en) | 2021-01-28 | 2021-01-28 | Radio frequency circuit applied to constant power of beauty instrument |
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| CN217409571U true CN217409571U (en) | 2022-09-13 |
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| CN202120245649.5U Active CN217409571U (en) | 2021-01-28 | 2021-01-28 | Radio frequency circuit applied to constant power of beauty instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117045962A (en) * | 2023-10-11 | 2023-11-14 | 泉州艾奇科技有限公司 | Micro-electric radio frequency control circuit and beauty instrument |
-
2021
- 2021-01-28 CN CN202120245649.5U patent/CN217409571U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117045962A (en) * | 2023-10-11 | 2023-11-14 | 泉州艾奇科技有限公司 | Micro-electric radio frequency control circuit and beauty instrument |
| CN117045962B (en) * | 2023-10-11 | 2024-01-30 | 泉州艾奇科技有限公司 | Micro-electric radio frequency control circuit and beauty instrument |
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