Radio frequency power control device of radio frequency skin therapeutic apparatus and radio frequency skin therapeutic apparatus

Abstract

The utility model discloses a radio frequency power control device of a radio frequency skin therapeutic apparatus and the radio frequency skin therapeutic apparatus. The radio frequency power control device comprises a radio frequency pulse signal sampling unit, a radio frequency pulse signal processing unit and a control unit, wherein the radio frequency pulse signal sampling unit is used for collecting a first radio frequency positive pulse signal and / or a first radio frequency negative pulse signal; the radio frequency pulse signal processing unit is used for receiving and processing the first radio frequency positive pulse signal and / or the first radio frequency negative pulse signal, and outputting a processed radio frequency voltage signal; the control unit is used for outputting a radio-frequency power control signal according to the processed radio-frequency voltage signal to adjust the radio-frequency transmitting power of the radio-frequency skin therapeutic apparatus, so that on the basis of not influencing the skin treatment effect of a curer, the safety protection effect is effectively achieved, the safety of the curer is guaranteed, better skin treatment experience is brought to the user, and the user experience is improved. And the system has relatively high intelligence.

Description

Technical Field

[0001] The utility model relates to the field of radio frequency skin therapeutic apparatus, in particular to a radio frequency power control device of the radio frequency skin therapeutic apparatus and the radio frequency skin therapeutic apparatus. Background Art

[0002] With the development of society and the improvement of living standards, people are paying more and more attention to skin beauty and treatment. Radiofrequency skin therapy devices can treat skin sagging, reduce skin wrinkles, shrink pores, tighten / lift skin tissue, or treat acne, scars, or reduce fat (fat softening or decomposition).

[0003] Radiofrequency skin therapy devices include desktop radiofrequency skin therapy devices or handheld radiofrequency skin therapy devices, which use monopolar treatment or multipolar treatment modes. Radiofrequency signals of specific frequencies (usually 2 to 5.5 MHz) act on human tissues to produce thermal effects, thereby heating the collagen fibers in the dermis within a certain temperature range through electromagnetic waves, and using thermal denaturation to shrink the collagen fibers, thereby tightening the skin, promoting blood circulation, accelerating metabolism, and improving skin elasticity.

[0004] In the prior art, the RF power detection and control circuit of the RF skin therapy device uses the working power supply and the standby power supply after load detection to realize the dual power supply switching of the RF skin therapy device. It is unable to adjust the output power of the RF skin therapy device according to different load impedances, and is unable to intelligently compare the output power of the RF skin therapy device with the target power through software algorithms for control, resulting in low safety and intelligence levels. Utility Model Content

[0005] The utility model aims to solve at least one of the above-mentioned technical problems existing in the prior art.

[0006] In order to solve the above problems, the utility model proposes a radio frequency power control device for a radio frequency skin therapy instrument, comprising: a radio frequency pulse signal sampling unit, a radio frequency pulse signal processing unit and a control unit; wherein the radio frequency pulse signal sampling unit is connected to the rated load of the radio frequency skin therapy instrument, and is used to collect a first radio frequency positive pulse signal, and / or a first radio frequency negative pulse signal; the radio frequency pulse signal processing unit is connected to the radio frequency pulse signal sampling unit, and is used to receive the first radio frequency positive pulse signal, and / or the first radio frequency negative pulse signal, and process the first radio frequency positive pulse signal, and / or the first radio frequency negative pulse signal, and output a processed radio frequency voltage signal; the control unit is connected to the radio frequency pulse signal processing unit, and is used to output a radio frequency power control signal according to the processed radio frequency voltage signal, so as to adjust the radio frequency transmission power of the radio frequency skin therapy instrument.

[0007] According to the RF power control device of the RF skin therapy instrument of the embodiment of the utility model, by setting a RF pulse signal sampling unit, a RF pulse signal processing unit and a control unit, when the RF skin therapy instrument is turned on, the control unit can output a RF power control signal according to the processed RF voltage signal to control the RF transmission power of the RF skin therapy instrument, thereby effectively playing a safety protection role and ensuring the safety of the therapist without affecting the skin treatment effect of the therapist, bringing the user a better skin treatment experience, and having high intelligence.

[0008] In addition, the radio frequency power control device of the radio frequency skin treatment device according to the embodiment of the utility model may also have the following additional technical features:

[0009] In some examples, the RF pulse signal processing unit includes: a first capacitor and / or a second capacitor, wherein the first capacitor is connected to the first RF positive pulse signal, and is used to extract the AC component in the first RF positive pulse signal, and output the extracted second RF positive pulse signal; the second capacitor is connected to the first RF negative pulse signal, and is used to extract the AC component in the first RF negative pulse signal, and output the extracted second RF negative pulse signal.

[0010] In some examples, the RF pulse signal processing unit includes: a first diode and / or a second diode, wherein the anode of the first diode is connected to the first RF forward pulse signal, the first diode is used to receive the first RF forward pulse signal, and output the positive half-wave periodic signal of the RF voltage signal; the anode of the second diode is connected to the first RF negative pulse signal, and is used to receive the first RF negative pulse signal and output the negative half-wave periodic signal of the RF voltage signal.

[0011] In some examples, the RF pulse signal processing unit includes: a voltage divider and current limiting module, one end of the voltage divider and current limiting module is connected to the RF pulse signal sampling unit, and the other end of the voltage divider and current limiting module is connected to the control unit, and the voltage divider and current limiting module is used to perform voltage divider and current limiting on the first RF positive pulse signal and / or the first RF negative pulse signal.

[0012] In some examples, the voltage divider and current limiting module includes: a first resistor and a second resistor, one end of the first resistor is connected to the first RF positive pulse signal, the other end of the first resistor is connected to the control unit, one end of the second resistor is connected to the control unit, and the other end of the second resistor is grounded; and / or a third resistor and a fourth resistor, one end of the third resistor is connected to the first RF negative pulse signal, the other end of the third resistor is connected to the control unit, one end of the fourth resistor is connected to the control unit, and the other end of the fourth resistor is grounded.

[0013] In some examples, the RF pulse signal processing unit includes: a filtering module, one end of the filtering module is connected to the RF pulse signal sampling unit, and the other end of the filtering module is connected to the control unit, and the filtering module is used to filter out interference signals in the first RF positive pulse signal and / or the first RF negative pulse signal.

[0014] In some examples, the filtering module includes: an RC filtering module, one end of the RC filtering module is connected to the first RF positive pulse signal and / or the first RF negative pulse signal, and the other end of the RC filtering module is connected to the control unit, and the RC filtering module is used to filter out the first interference signal in the first RF positive pulse signal and / or the first RF negative pulse signal.

[0015] In some examples, the filtering module also includes: a second interference signal filtering module, one end of the second interference signal filtering module is connected to the first RF positive pulse signal, and / or the first RF negative pulse signal, and the other end of the second interference signal filtering module is connected to the RC filtering module; wherein the second interference signal filtering module includes an LC filtering module, and / or a common mode inductor filtering module.

[0016] In response to the above-mentioned problems, the present invention also proposes a radio frequency skin therapeutic device, which includes a radio frequency power amplifier and a radio frequency power control device of the radio frequency skin therapeutic device as described in any of the above embodiments of the present invention; wherein the radio frequency power amplifier is used to receive a driving radio frequency signal and amplify the radio frequency signal; the input end of the radio frequency power control device of the radio frequency skin therapeutic device is connected to the output end of the radio frequency power amplifier, and the output end of the radio frequency power control device of the radio frequency skin therapeutic device is connected to the control unit.

[0017] In some examples, the RF skin therapy device further includes: a buffer protection circuit and / or an impedance matching circuit; wherein the buffer protection circuit is connected to the RF power amplifier, and the buffer protection circuit is used to perform isolation protection when the RF skin therapy device is not in contact with the human body; the impedance matching circuit is connected to the RF power amplifier, and the impedance matching circuit includes a rated load, and the impedance matching circuit is used to match different human body impedances and output RF signals to the human body.

[0018] Furthermore, a buffer protection circuit can be set up to protect the internal circuit of the RF module and avoid strong discomfort caused by the human body when the RF skin therapy device is not in contact with the human body; at the same time, an impedance matching circuit can be set up to adapt to different therapists and achieve better treatment effects.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a schematic block diagram of a radio frequency power control device of a radio frequency skin treatment device according to an embodiment of the utility model;

[0022] Figure 2 It is a circuit schematic diagram of a radio frequency power control device of a radio frequency skin treatment device according to an embodiment of the utility model;

[0023] Figure 3 is a circuit schematic diagram of a radio frequency power control device of a radio frequency skin treatment device according to another embodiment of the utility model;

[0024] Figure 4 It is a circuit schematic diagram of a radio frequency power control device of a radio frequency skin treatment device according to another embodiment of the utility model.

[0025] Reference numerals:

[0026] A radio frequency power control device-100 of a radio frequency skin therapeutic device; a radio frequency pulse signal sampling unit-110; a radio frequency pulse signal processing unit-120; a control unit-130; a voltage dividing and current limiting module-121; a filtering module-122; an RC filtering module-1221; and a second interference signal filtering module-1222. DETAILED DESCRIPTION

[0027] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0028] Reference below Figure 1-Figure 4 The invention describes a radio frequency power control device of a radio frequency skin treatment apparatus and a radio frequency skin treatment apparatus according to an embodiment of the invention.

[0029] Figure 1 FIG. 1 is a schematic block diagram of a radio frequency power control device 100 of a radio frequency skin treatment device according to an embodiment of the present invention. Figure 1 As shown, the radio frequency power control device 100 of the radio frequency skin treatment device includes: a radio frequency pulse signal sampling unit 110, a radio frequency pulse signal processing unit 120 and a control unit 130.

[0030] Specifically, the radio frequency pulse signal sampling unit 110 is connected to the rated load of the radio frequency skin treatment device, and is used to collect the first radio frequency positive pulse signal and / or the first radio frequency negative pulse signal.

[0031] Specifically, combined Figure 1-Figure 4 As shown, the RF pulse signal sampling unit 110 includes sampling terminals VH and VL, wherein the sampling terminal VH is connected to the positive pole of the rated load of the RF skin therapeutic apparatus for collecting the first RF positive pulse signal, and the sampling terminal VL is connected to the negative pole of the rated load of the RF skin therapeutic apparatus for collecting the first RF negative pulse signal. It can be understood that during the operation of the RF skin therapeutic apparatus, the RF pulse signal sampling unit 110 is connected to the rated load of the RF skin therapeutic apparatus, and can be used to collect the first RF positive pulse signal or the first RF negative pulse signal, or can collect the first RF positive pulse signal and the first RF negative pulse signal at the same time.

[0032] In a specific embodiment, the rated load may be a non-inductive resistor with a resistance value of 200Ω.

[0033] The RF pulse signal processing unit 120 is connected to the RF pulse signal sampling unit 110, and is used to receive the first RF positive pulse signal and / or the first RF negative pulse signal, and process the first RF positive pulse signal and / or the first RF negative pulse signal, and output the processed RF voltage signal.

[0034] Specifically, the RF pulse signal processing unit 120 can receive the first RF positive pulse signal or the first RF negative pulse signal collected by the RF pulse signal sampling unit 110, or simultaneously receive the first RF positive pulse signal and the first RF negative pulse signal, by connecting to the RF pulse signal sampling unit 110. Furthermore, since the first RF positive pulse signal and the first RF negative pulse signal are AC signals, there may be interference signals when sampling by the RF pulse signal sampling unit 110. In order to make the collected first RF positive pulse signal and the first RF negative pulse signal more accurate, the received first RF positive pulse signal and the first RF negative pulse signal can be processed, and the processed RF voltage signal can be output. The processing process includes but is not limited to filtering, voltage division and current limiting, etc.

[0035] The control unit 130 is connected to the RF pulse signal processing unit 120 and is used to output a RF power control signal according to the processed RF voltage signal to adjust the RF transmission power of the RF skin treatment device.

[0036] Specifically, the control unit 130 receives the processed RF voltage signal in real time through the connection with the RF pulse signal processing unit 120, and generates a corresponding RF power control signal according to the processed RF voltage signal, and outputs it to the RF skin therapy device, so as to realize accurate and dynamic adjustment of the RF transmission power of the RF skin therapy device, ensure the safety and effectiveness during the treatment, and improve the treatment effect and the comfort of the patient.

[0037] Thus, the RF power control device 100 of the above-mentioned RF skin therapy instrument, by setting the RF pulse signal sampling unit 110, the RF pulse signal processing unit 120 and the control unit 130, when the RF skin therapy instrument is turned on, the control unit 130 can output the RF power control signal according to the processed RF sampling signal (voltage signal), so as to control the RF transmission power of the RF skin therapy instrument according to the first RF positive pulse signal and / or the first RF negative pulse signal, thereby effectively playing a safety protection role and ensuring the safety of the therapist without affecting the skin treatment effect of the therapist, bringing the user a better skin treatment experience, and having high intelligence.

[0038] In one embodiment of the present invention, Figure 2 , Figure 3 and Figure 4As shown, the RF pulse signal processing unit 120 includes: a first capacitor C9 and / or a second capacitor C10, wherein the first capacitor C9 is connected to the first RF positive pulse signal, and is used to extract the AC component in the first RF positive pulse signal, and output the extracted second RF positive pulse signal; the second capacitor C10 is connected to the first RF negative pulse signal, and is used to extract the AC component in the first RF negative pulse signal, and output the extracted second RF negative pulse signal.

[0039] Specifically, the RF pulse signal processing unit 120 may include the first capacitor C9 or the second capacitor C10 alone, or include the first capacitor C9 and the second capacitor C10 at the same time. Among them, the first capacitor C9 is connected to the first RF positive pulse signal to extract the AC component from the first RF positive pulse signal, that is, the first RF positive pulse signal is processed and converted into the extracted second RF positive pulse signal; the second capacitor C10 is connected to the first RF negative pulse signal to extract the AC component from the first RF negative pulse signal, that is, the first RF negative pulse signal is processed and converted into the extracted second RF negative pulse signal. It can be understood that in the RF pulse signal processing unit 120, the first capacitor C9 and the second capacitor C10 have the characteristics of isolating DC and passing AC, and can be used as a filter to filter out the DC component of the RF pulse signal and only allow the AC component to pass, thereby extracting the AC component in the RF pulse signal.

[0040] In one embodiment of the present invention, Figure 2 , Figure 3 and Figure 4 As shown, the RF pulse signal processing unit 120 includes: a first diode D1 and / or a second diode D2, wherein the anode of the first diode D1 is connected to the first RF forward pulse signal, the first diode D1 is used to receive the first RF forward pulse signal, and output a positive half-wave periodic signal of the RF voltage signal; the anode of the second diode D2 is connected to the first RF negative pulse signal, and is used to receive the first RF negative pulse signal, and output a negative half-wave periodic signal of the RF voltage signal.

[0041] Specifically, the RF pulse signal processing unit 120 includes a first diode D1 or a second diode D2, or includes both the first diode D1 and the second diode D2. Among them, the anode of the first diode D1 is connected to the first RF forward pulse signal. When the first RF forward pulse signal passes through the anode of the first diode D1, due to the forward conduction characteristic of the diode, only forward flow is allowed. After processing, only the positive half-wave periodic signal of the RF voltage signal will be output; the anode of the second diode D2 is connected to the first RF negative pulse signal. When the first RF negative pulse signal passes through the anode of the second diode D2, due to the forward conduction characteristic of the diode, only forward flow is allowed. After processing, only the negative half-wave periodic signal of the RF voltage signal will be output. In summary, by utilizing the rectification characteristics of the first diode D1 and the second diode D2, the RF pulse signal processing unit 120 can extract the positive half-wave periodic signal and / or the negative half-wave periodic signal of the RF voltage signal from the first RF forward pulse signal and / or the negative pulse signal, so that the positive half-wave periodic signal and the negative half-wave periodic signal of the RF voltage signal do not interfere with each other.

[0042] In one embodiment of the present invention, Figure 2 , Figure 3 and Figure 4 As shown, the RF pulse signal processing unit 120 includes: a voltage divider and current limiting module 121, one end of the voltage divider and current limiting module 121 is connected to the RF pulse signal sampling unit 110, and the other end of the voltage divider and current limiting module 121 is connected to the control unit 130, and the voltage divider and current limiting module 121 is used to perform voltage divider and current limiting on the first RF positive pulse signal and / or the first RF negative pulse signal.

[0043] Specifically, the RF pulse signal processing unit 120 further includes a voltage-dividing and current-limiting module 121. One end of the voltage-dividing and current-limiting module 121 receives a first RF positive pulse signal (such as Figure 2 as shown) or the first RF negative pulse signal (as shown Figure 3 ), or simultaneously receiving a first radio frequency positive pulse signal and a first radio frequency negative pulse signal (as shown in Figure 4As shown), voltage division and current limiting processing is performed, and the other end of the voltage division and current limiting module 121 is connected to the control unit 130, and the processed RF pulse signal is transmitted to the control unit 130. Specifically, since the voltage of the RF pulse signal collected by the RF pulse signal sampling unit 110 is relatively high, the rear-end control unit 130 cannot withstand it. Therefore, when the RF pulse signal processing unit 120 receives the RF pulse signal, the voltage division and current limiting module 121 can adjust the voltage and current of the RF pulse signal according to preset parameters, so that the voltage of the collected RF pulse signal is reduced to an appropriate range, and the current of the RF pulse signal is limited to a certain range, so that the control unit 130 obtains a stable and reliable RF pulse signal, thereby enhancing the stability and reliability of the RF skin therapy device.

[0044] In one embodiment of the present invention, Figure 2 , Figure 3 and Figure 4 As shown, the voltage-dividing and current-limiting module 121 includes: a first resistor R7 and a second resistor R8, one end of the first resistor R7 is connected to the first RF positive pulse signal, the other end of the first resistor R7 is connected to the control unit 130, one end of the second resistor R8 is connected to the control unit 130, and the other end of the second resistor R8 is grounded; and / or a third resistor R10 and a fourth resistor R9, one end of the third resistor R10 is connected to the first RF negative pulse signal, the other end of the third resistor R10 is connected to the control unit 130, one end of the fourth resistor R9 is connected to the control unit 130, and the other end of the fourth resistor R9 is grounded.

[0045] Specifically, the voltage-dividing and current-limiting module 121 may include a first resistor R7 and a second resistor R8 (eg Figure 2 ), or separately including the third resistor R10 and the fourth resistor R9 (as shown Figure 3 As shown), or including a first resistor R7, a second resistor R8, a third resistor R10 and a fourth resistor R9 (as shown) Figure 4As shown). Among them, one end of the first resistor R7 is connected to the first RF positive pulse signal for receiving this signal, and the other end of the first resistor R7 is connected to the control unit 130 for transmitting the processed signal to the control unit 130. At the same time, one end of the second resistor R8 is connected to the control unit 130, and together with the first resistor R7, it forms a voltage divider to achieve a voltage divider function. The other end of the second resistor R8 is grounded, and the current is controlled by increasing or decreasing the resistance value, and it is limited to a suitable range to achieve a current limiting function. Similarly, one end of the third resistor R10 is connected to the first RF negative pulse signal for receiving this signal, and the other end of the third resistor R10 is connected to the control unit 130 for transmitting the processed signal to the control unit 130. At the same time, one end of the fourth resistor R9 is connected to the control unit 130, and together with the third resistor R10, it forms a voltage divider to achieve a voltage divider function. The other end of the fourth resistor R9 is grounded, and the current is controlled by increasing or decreasing the resistance value, and it is limited to a suitable range to achieve a current limiting function.

[0046] In a specific embodiment, one end of the second resistor R8 is connected to the control unit 130, and together with the first resistor R7, it forms a voltage divider. The voltage after voltage division is VH*R8 / (R7+R8). The other end of the second resistor R8 is grounded to realize the current limiting function. The current after current limiting is VH / (R7+R8); one end of the fourth resistor R9 is connected to the control unit 130, and together with the third resistor R10, it forms a voltage divider. The voltage after voltage division is VL*R9 / (R9+R10). The other end of the fourth resistor R9 is grounded to realize the current limiting function. The current after current limiting is VL / (R9+R10).

[0047] In one embodiment of the present invention, Figure 2 , Figure 3 and Figure 4 As shown, the RF pulse signal processing unit 120 includes: a filtering module 122, one end of the filtering module 122 is connected to the RF pulse signal sampling unit 110, and the other end of the filtering module 122 is connected to the control unit 130, and the filtering module 122 is used to filter out interference signals in the first RF positive pulse signal and / or the first RF negative pulse signal.

[0048] Specifically, the RF pulse signal processing unit 120 further includes a filter module 122 for filtering out interference signals in the RF pulse signal, including but not limited to electromagnetic interference or noise generated inside the circuit. One end of the filter module 122 is connected to the RF pulse signal sampling unit 110 for receiving a first RF positive pulse signal (such as Figure 2 As shown) or the first RF negative pulse signal (as shown Figure 3 ), or simultaneously receiving a first radio frequency positive pulse signal and a first radio frequency negative pulse signal (as shown in Figure 4 As shown), the other end of the filter module 122 is connected to the control unit 130, which is used to transmit the processed RF pulse signal to the control unit 130, so that the control unit 130 generates a corresponding RF power control signal according to the processed RF pulse signal to adjust the RF transmission power of the RF skin therapy device.

[0049] In one embodiment of the present invention, Figure 2 , Figure 3 and Figure 4 As shown, the filtering module 122 includes: an RC filtering module 1221, one end of the RC filtering module 1221 is connected to the first RF positive pulse signal, and / or the first RF negative pulse signal, the other end of the RC filtering module 1221 is connected to the control unit 130, and the RC filtering module 1221 is used to filter out the first interference signal in the first RF positive pulse signal and / or the first RF negative pulse signal.

[0050] Specifically, the filter module 122 includes an RC filter module 1221, which is used to filter out the first interference signal in the RF pulse signal, such as noise inside the circuit or electromagnetic interference from the external environment. Specifically, one end of the RC filter module 1221 can be connected to the first RF positive pulse signal (such as Figure 2 As shown) or the first RF negative pulse signal (as shown Figure 3 ), or simultaneously connect the first RF positive pulse signal and the first RF negative pulse signal (as shown in Figure 4 As shown), it is used to receive the radio frequency pulse signal. The other end of the RC filter module 1221 is connected to the control unit 130, which is used to transmit the signal processed by the RC filter module 1221 to the control unit 130.

[0051] In one embodiment of the present invention, Figure 2 , Figure 3 and Figure 4 As shown, the filtering module also includes: a second interference signal filtering module 1222, one end of the second interference signal filtering module 1222 is connected to the first RF positive pulse signal, and / or the first RF negative pulse signal, and the other end of the second interference signal filtering module 1222 is connected to the RC filtering module 1221; wherein the second interference signal filtering module 1222 includes an LC filtering module, and / or a common mode inductor filtering module L3.

[0052] Specifically, the filtering module 122 may further include a second interference signal filtering module 1222 for filtering out noise inside the circuit or electromagnetic interference from the external environment. Specifically, one end of the second interference signal filtering module 1222 may be connected to the first RF forward pulse signal (eg Figure 2 As shown) or the first RF negative pulse signal (as shown Figure 3), or simultaneously connect the first RF positive pulse signal and the first RF negative pulse signal (as shown in Figure 4 ), for receiving RF pulse signals, the other end of the second interference signal filtering module 1222 is connected to the RC filtering module 1221, and the RF pulse signal after filtering out the interference components is transmitted to the RC filtering module 1221 for further filtering processing. Among them, the second interference signal filtering module 1222 may include an LC filtering module or a common mode inductor filtering module L3, or include both an LC filtering module and a common mode inductor filtering module L3.

[0053] It should be noted that the RC filter module 1221 and the capacitor C1 next to the ADC sampling of the control unit 130 can be set according to actual conditions, and the LC filter module and the common-mode inductor filter module L3 can be set by either one or both, or the LC filter module and the common-mode inductor filter module L3 can be set.

[0054] In summary, the RF power control device 100 of the RF skin therapy device of the utility model, by setting the RF pulse signal sampling unit 110, the RF pulse signal processing unit 120 and the control unit 130, when the RF skin therapy device is turned on, the control unit 130 can output the RF power control signal according to the processed RF voltage signal, so as to control the RF transmission power of the RF skin therapy device according to the first RF positive pulse signal and / or the first RF negative pulse signal, thereby effectively playing a safety protection role and ensuring the safety of the therapist without affecting the skin treatment effect of the therapist, bringing the user a better skin treatment experience, and having high intelligence.

[0055] A further embodiment of the present invention also discloses a radio frequency skin therapeutic device, which includes a radio frequency power amplifier and a radio frequency power control device 100 of the radio frequency skin therapeutic device as described in any of the above embodiments of the present invention. The present invention can be applied to both desktop radio frequency skin therapeutic devices and handheld radio frequency skin therapeutic devices.

[0056] Among them, the RF power amplifier is used to receive the driving RF signal and amplify the RF signal; the input end of the RF power control device 100 of the RF skin therapy instrument is connected to the output end of the RF power amplifier, and the output end of the RF power control device 100 of the RF skin therapy instrument is connected to the control unit 130.

[0057] Specifically, the radio frequency skin treatment device includes a radio frequency power amplifier, which is used to receive a driving radio frequency signal and amplify the radio frequency signal so that the radio frequency signal is output at a higher voltage. Specifically, the input end of the radio frequency power control device 100 of the radio frequency skin treatment device is connected to the output end of the radio frequency power amplifier. When the radio frequency signal is input to the input end of the radio frequency power amplifier, the radio frequency power amplifier starts to work and amplifies the signal to reach the voltage level required for treatment; the output end of the radio frequency power control device 100 of the radio frequency skin treatment device is connected to the control unit 130, so that the output end of the radio frequency power control device can feed back a signal to the input end of the radio frequency power amplifier, thereby ensuring accurate control of the radio frequency power during treatment.

[0058] In one embodiment of the utility model, the radio frequency skin therapy device also includes: a buffer protection circuit and / or an impedance matching circuit; wherein the buffer protection circuit is connected to the radio frequency power amplifier, and the buffer protection circuit is used to perform isolation protection when the radio frequency skin therapy device is not in contact with the human body; the impedance matching circuit is connected to the radio frequency power amplifier, and the impedance matching circuit includes a rated load, and the impedance matching circuit is used to match different human body impedances and output radio frequency signals to the human body.

[0059] Specifically, the radio frequency skin therapy device may also include a buffer protection circuit or an impedance matching circuit, or may include both a buffer protection circuit and an impedance matching circuit. Among them, the buffer protection circuit is connected to the radio frequency power amplifier. When the radio frequency probe of the radio frequency skin therapy device does not touch the human body, the radio frequency skin therapy device is unloaded at this time. In order to protect the internal circuit of the radio frequency skin therapy device and the strong discomfort caused by unloaded contact with the human body, a buffer protection circuit can be added to automatically cut off or reduce the output of the radio frequency power amplifier to achieve isolation protection; the impedance matching circuit is connected to the radio frequency power amplifier to match different human body impedances and output radio frequency signals to the human body. It is understandable that during radio frequency treatment, due to differences in human body impedance, different patients have different impedances. Adding an impedance matching circuit can match different human body impedances to ensure that the radio frequency signal can be transmitted to the human body with maximum efficiency.

[0060] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A radio frequency power control device for a radio frequency skin treatment device, characterized in that: include: RF pulse signal sampling unit, RF pulse signal processing unit and control unit; wherein, The radio frequency pulse signal sampling unit is connected to the rated load of the radio frequency skin treatment device and is used to collect the first radio frequency positive pulse signal and / or the first radio frequency negative pulse signal; The RF pulse signal processing unit is connected to the RF pulse signal sampling unit, and is used to receive the first RF positive pulse signal and / or the first RF negative pulse signal, and process the first RF positive pulse signal and / or the first RF negative pulse signal, and output the processed RF voltage signal; The control unit is connected to the radio frequency pulse signal processing unit and is used to output a radio frequency power control signal according to the processed radio frequency voltage signal to adjust the radio frequency transmission power of the radio frequency skin treatment device.

2. The radio frequency power control device of the radio frequency skin treatment device according to claim 1, characterized in that: The radio frequency pulse signal processing unit comprises: a first capacitor and / or a second capacitor, wherein the first capacitor is connected to the first RF positive pulse signal, and is used to extract the AC component in the first RF positive pulse signal, and output the extracted second RF positive pulse signal; and the second capacitor is connected to the first RF negative pulse signal, and is used to extract the AC component in the first RF negative pulse signal, and output the extracted second RF negative pulse signal.

3. The radio frequency power control device of the radio frequency skin treatment device according to claim 1, characterized in that: The radio frequency pulse signal processing unit comprises: the first diode and / or the second diode, Among them, the anode of the first diode is connected to the first RF forward pulse signal, and the first diode is used to receive the first RF forward pulse signal and output the positive half-wave periodic signal of the RF voltage signal; the anode of the second diode is connected to the first RF negative pulse signal, and is used to receive the first RF negative pulse signal and output the negative half-wave periodic signal of the RF voltage signal.

4. The radio frequency power control device of the radio frequency skin treatment device according to claim 1, characterized in that: The radio frequency pulse signal processing unit comprises: A voltage divider and current limiting module, one end of which is connected to the RF pulse signal sampling unit, and the other end of which is connected to the control unit, and the voltage divider and current limiting module is used to perform voltage divider and current limiting on the first RF positive pulse signal and / or the first RF negative pulse signal.

5. The radio frequency power control device of the radio frequency skin treatment device according to claim 4, characterized in that: The voltage-dividing and current-limiting module comprises: a first resistor and a second resistor, one end of the first resistor is connected to the first RF forward pulse signal, the other end of the first resistor is connected to the control unit, one end of the second resistor is connected to the control unit, and the other end of the second resistor is grounded; and / or A third resistor and a fourth resistor, one end of the third resistor is connected to the first RF negative pulse signal, the other end of the third resistor is connected to the control unit, one end of the fourth resistor is connected to the control unit, and the other end of the fourth resistor is grounded.

6. The radio frequency power control device of the radio frequency skin treatment device according to any one of claims 1 to 5, characterized in that: The radio frequency pulse signal processing unit comprises: A filtering module, one end of which is connected to the RF pulse signal sampling unit, and the other end of which is connected to the control unit, and the filtering module is used to filter out interference signals in the first RF positive pulse signal and / or the first RF negative pulse signal.

7. The radio frequency power control device of the radio frequency skin treatment device according to claim 6, characterized in that: The filtering module includes: an RC filtering module, one end of the RC filtering module is connected to the first RF positive pulse signal and / or the first RF negative pulse signal, the other end of the RC filtering module is connected to the control unit, and the RC filtering module is used to filter out the first interference signal in the first RF positive pulse signal and / or the first RF negative pulse signal.

8. The radio frequency power control device of the radio frequency skin treatment device according to claim 7, characterized in that: The filtering module further includes: A second interference signal filtering module, one end of the second interference signal filtering module is connected to the first RF positive pulse signal, and / or the first RF negative pulse signal, and the other end of the second interference signal filtering module is connected to the RC filtering module; wherein the second interference signal filtering module includes an LC filtering module, and / or a common mode inductor filtering module.

9. A radio frequency skin treatment device, characterized in that: The radio frequency skin treatment apparatus comprises a radio frequency power amplifier, and a radio frequency power control device of the radio frequency skin treatment apparatus according to any one of claims 1 to 8; The RF power amplifier is used to receive a driven RF signal and amplify the RF signal; The input end of the radio frequency power control device of the radio frequency skin treatment instrument is connected to the output end of the radio frequency power amplifier, and the output end of the radio frequency power control device of the radio frequency skin treatment instrument is connected to the control unit.

10. The radio frequency skin treatment device according to claim 9, characterized in that: The radio frequency skin treatment device further includes: a buffer protection circuit and / or an impedance matching circuit; wherein, The buffer protection circuit is connected to the RF power amplifier, and the buffer protection circuit is used to perform isolation protection when the RF skin therapy device is not in contact with the human body; the impedance matching circuit is connected to the RF power amplifier, and the impedance matching circuit includes a rated load. The impedance matching circuit is used to match different human body impedances and output RF signals to the human body.

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