EMS and RF Function Switching Circuit and Massager

Abstract

An embodiment of the present invention relates to the technical field of switching circuits, and discloses an EMS and RF function switching circuit and a massager. The EMS and RF function switching circuit sends first frequency signals and second frequency signals with different frequencies to the EMS / RF control circuit through a controller, so as to realize flexible switching between the EMS function and the RF function. At the same time, by acquiring a first detection signal flowing through the second contact point, the controller can timely adjust the transmission power of the EMS / RF circuit according to the skin contact situation, saving power and improving the effect of the user using the EMS function and the RF function.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of switching circuits, and more particularly to an EMS and RF function switching circuit and a massager. Background Art

[0002] With the rapid development of technology and the increasing improvement of life, more and more women have a strong desire to pursue beauty. To meet this need, some people have invented ultrasonic beauty devices that can shape the body, and some have invented dynamic light beauty devices that can remove acne, whiten the skin, and remove wrinkles. Some people have designed RF radio frequency devices to stimulate the regeneration of collagen in the bottom layer of the skin to achieve the effect of skin tightening.

[0003] The inventors of the present application found during the research process that the existing beauty devices with multiple functions are relatively single in function. When users use them, they often need to use multiple devices in combination, which is relatively costly and inconvenient to carry. Summary of the Invention

[0004] In view of the above problems, the embodiments of the present invention provide an EMS and RF function switching circuit to solve the problem of the need to use multiple devices in combination in the prior art.

[0005] According to one aspect of the embodiments of the present invention, an EMS and RF function switching circuit is provided, including: a controller, a switching circuit, an EMS / RF control circuit, a first contact point, and a second contact point;

[0006] One end of the switching circuit is electrically connected to the first contact point and the second contact point respectively, and the other end is electrically connected to the EMS / RF control circuit under the control of the controller;

[0007] The first contact point and the second contact point are used to contact the human body;

[0008] The EMS / RF control circuit is electrically connected to the controller, and is used to receive the first frequency signal sent by the controller and start the EMS function according to the first frequency signal; the EMS / RF control circuit is also used to receive the second frequency signal sent by the controller and start the RF function according to the second frequency signal;

[0009] The controller is used to obtain the first detection signal flowing through the second contact point, and adjust the transmission power of the first frequency signal and the second frequency signal according to the first detection signal.

[0010] According to another aspect of the embodiments of the present invention, a massager is provided, and the massager includes the EMS and RF function switching circuit described in the above embodiments.

[0011] As can be seen from the above embodiments, in the embodiments of the present invention, the controller sends a first frequency signal and a second frequency signal with different frequencies to the EMS / RF control circuit, so as to flexibly switch between the EMS function and the RF function.

[0012] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the description. And in order to make the above and other objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are specifically exemplified below. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0014] Figure 1 The functional block diagram of the EMS and RF function switching circuit provided by the embodiment of the present invention is shown;

[0015] Figure 2 Another functional block diagram of the EMS and RF function switching circuit provided by the embodiment of the present invention is shown;

[0016] Figure 3 The circuit diagram of the EMS and RF function switching circuit provided by the embodiment of the present invention is shown;

[0017] Figure 4A The circuit diagram of the controller provided by the embodiment of the present invention is shown;

[0018] Figure 4B The voltage stabilizing circuit diagram provided by the embodiment of the present invention is shown;

[0019] Figure 5 The EMS / RF control circuit diagram provided by the embodiment of the present invention is shown;

[0020] Figure 6 Another EMS / RF control circuit diagram provided by the embodiment of the present invention is shown;

[0021] Figure 7 The second loop detection circuit diagram provided by the embodiment of the present invention is shown

[0022] Figure 8 The functional architecture diagram of the massager provided by the embodiment of the present invention is shown;

[0023] Figure 9 The functional circuit diagram of the massager provided by the embodiment of the present invention is shown;

[0024] Figure 10A Shows the skin detection circuit diagram provided by the embodiment of the present invention;

[0025] Figure 10B Shows the output simulation diagram of the skin detection circuit provided by the embodiment of the present invention;

[0026] Figure 10C Shows the moisture value curve of the skin detection result provided by the embodiment of the present invention;

[0027] Figure 10D Shows the water-oil curve diagram of the skin detection result provided by the embodiment of the present invention;

[0028] Figure 11 Shows the first loop detection circuit and the third loop detection circuit diagram provided by the embodiment of the present invention;

[0029] Figure 12 Shows the photon drive circuit diagram provided by the embodiment of the present invention;

[0030] Figure 13 Shows the Peltier drive circuit diagram provided by the embodiment of the present invention;

[0031] Figure 14A Shows the motor drive circuit diagram provided by the embodiment of the present invention;

[0032] Figure 14B Shows the buzzer circuit diagram provided by the embodiment of the present invention. Detailed implementation manners

[0033] Hereinafter, embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and thus are only examples and cannot be used to limit the protection scope of the present invention.

[0034] Please refer to Figure 1 , Figure 1 Shows the functional framework diagram of the EMS and RF function switching circuit proposed by the embodiment of the present invention, including: a controller 100, a switch circuit 200, an EMS / RF control circuit 300, a first contact point TB1, and a second contact point P2; one end of the switch circuit 200 is electrically connected to the first contact point TB1 and the second contact point P2 respectively, and the other end is electrically connected to the EMS / RF control circuit 300 under the control of the controller 100; the first contact point TB1 and the second contact point P2 are used to contact the human body.

[0035] The EMS / RF control circuit 300 is electrically connected to the controller 100 and is configured to receive a first frequency signal sent by the controller 100 and activate the EMS function according to the first frequency signal; the EMS / RF control circuit 300 is further configured to receive a second frequency signal sent by the controller 100 and activate the RF function according to the second frequency signal. The controller 100 is configured to obtain a first detection signal flowing through the second contact point and adjust the transmission powers of the first frequency signal and the second frequency signal according to the first detection signal.

[0036] As Figure 1 shown, for the EMS / RF control circuit, it includes two functions, namely the EMS function and the RF function. Among them, the RF function is a very important part of the electromagnetic spectrum. The energy of radio and microwave both belongs to the category of electromagnetic radiation energy, and they are collectively referred to as radio frequency. Radio frequency is measured in frequency and can range from several hundred KHZ to several hundred MHZ. When radio frequency starts to work, it can change the electrode polarity of the electric field in biological tissue millions of times within 1 second. The charged tissue particles in the electric field change their polarity at the frame frequency. The natural impedance of the dermal tissue acts on the movement of electrons to generate heat. This friction caused by the movement of electrons causes a columnar heating effect in the deep layer of the skin. This thermal effect will initially change the collagen, resulting in collagen contraction, and then new collagen is regenerated, leading to dermal reconstruction and thickening. The full name of the EMS function is Electrical Muscle Stimulation, and its Chinese name is muscle current stimulation technology. Its principle is to directly stimulate the motor nerve through an external current, triggering muscle contraction movement, so as to directly and effectively achieve the purpose of muscle building or shaping. The low-frequency current frequency can continuously and effectively move the muscle frequency. If the frequency used is higher than a certain frequency, the muscle tension will start to decline. The muscle cannot meet its neurophysiological conditions, so it cannot obtain an ideal exercise effect. In addition, the muscle uses energy and consumes oxygen during exercise. Therefore, in the embodiment of the present invention, the controller sends first frequency signals and second frequency signals with different frequencies to the EMS / RF control circuit to realize flexible switching between the EMS function and the RF function.

[0037] Meanwhile, since the areas of skin contact when people use the EMS function and the RF function are different, the effects will also be different. Therefore, in a further embodiment of the present invention, the controller obtains a first control signal flowing through the second contact point at the first control signal output end, and adjusts the output power of the first frequency signal or the second frequency signal according to the first control signal. When the first contact point and the second contact point have more skin contact, the facial impedance is larger, and the value of the first detection signal is lower. At this time, the controller reduces the transmission power of the first frequency signal or the second frequency signal. When the first contact point and the second contact point have less skin contact, since the resistance value generated by the skin is smaller, the value of the first detection signal is higher. At this time, the controller increases the transmission power of the first frequency signal or the second frequency signal to produce a better effect.

[0038] Therefore, as can be seen from the above, in the embodiment of the present invention, the controller sends the first frequency signal and the second frequency signal of different frequencies to the EMS / RF control circuit to realize the flexible switching between the EMS function and the RF function. Meanwhile, by obtaining the first detection signal flowing through the second contact point, the controller can timely adjust the transmission power of the EMS / RF circuit according to the skin contact situation, saving power and improving the effects of the user using the EMS function and the RF function.

[0039] Furthermore, when the EMS / RF control circuit operates in the EMS mode, the frequency of the output carrier signal of the controller is relatively low. When measuring the electrical signal passing through the second contact point P2, there are often errors, resulting in inaccurate measurement and unable to precisely control the EMS / RF control circuit 300. In an embodiment of the present application, a second loop detection circuit 600 is further proposed, as Figure 2 shown, the second loop detection circuit 600 is electrically connected to the second contact point P2, detects the electrical signal flowing through the second contact point P2, and outputs a second detection signal to the controller 100. The controller 100 controls the EMS / RF control circuit 300 according to the second detection signal. The second loop detection circuit 600 detects the electrical signal flowing through the second contact point P2 more sensitively, can more accurately obtain the contact situation between the second contact point P2 and the skin, and the controller 100 adjusts the transmission power of the first frequency signal and the second frequency signal according to the second detection signal.

[0040] Figure 3 is a schematic diagram of the EMS and RF function switching circuit. The switch circuit 200 is an electrically controlled double-pole switch. One path is connected to the first contact point TB1, and the other path is connected to the second contact point P2. The first contact point TB1 and the second contact point P2 are used to contact the skin.

[0041] The controller 100 receives the first detection signal through the port CHECK P2, receives the second detection signal through the port CHECK P1, controls the EMS function of the EMS / RF control circuit 300 through the EMS-PWM port, and controls the RF function of the EMS / RF control circuit 300 through the RF-PWM port.

[0042] To describe the above EMS and RF function switching circuits in more detail, the implementation manners of the EMS / RF control circuit 300 and the controller 100 circuit will be described separately below.

[0043] As Figure 4A shown, it is the circuit diagram of the controller 100 provided by the embodiment of the present invention. The controller 100 can adopt common programmable controller components such as PLC, digital processing chip DSP or single-chip microcomputer, etc. In this embodiment, we exemplarily adopt the STM32F030R8T6 programmable control chip as the controller 100. The specific pins are as Figure 4A shown, including signal input pins, signal output pins, and input and output pins, etc. For example: DCDC EN pin: The controller 100 serves as an enabling end to enable each control unit; RF-PWM pin: Serves as an RF control signal output end and is connected to the EMS / RF control circuit 300; EMS-PWM pin: Serves as an EMS control signal output end and is connected to the EMS / RF control circuit 300; KG1 and KG2 pins: Used to output control signals to the switch circuit 200; CHECK P1 pin: Used to receive the second detection signal; CHECK P2 pin: Used to receive the first detection signal. More specific and detailed descriptions of the chip pins will not be elaborated here. Those of ordinary skill in the art can select appropriate pins for control according to needs. In the following text, when specific pins are used, their pin names will be directly cited, and it can be directly understood as being connected to the pins of the controller 100, and the corresponding relationship with the controller 100 will not be described anymore.

[0044] As Figure 4B shown, it is the voltage stabilization circuit diagram provided by the embodiment of the present invention. The embodiment of the present invention uses wireless charging to provide power for the EMS and RF function switching circuits. The wireless charging circuit is designed with DS_JDS9002, which is a three-in-one chip integrating wireless reception, lithium battery protection chip, and charging management. The maximum charging current is 450 mA, and it has a dedicated communication protocol; the voltage stabilization chip is designed with the XC6206P33 chip, outputting a stable 3.3 V with a minimum leakage current of 7 μA.

[0045] Figure 5This is the EMS / RF control circuit diagram provided by the embodiments of the present invention. The EMS / RF control circuit diagram is composed of a transformer, a MOS tube drive circuit, a boost circuit, etc. The controller 100 outputs waveforms of different frequencies through the EMS-PWM pin to drive the MOS tube to work. When the controller 100 emits a carrier wave of 1 MHz through the EMS-PWM pin, it drives the MOS tube to work. The transformer outputs a high-voltage sine wave signal to generate a high-frequency signal. When the high-frequency signal acts on the skin, it will produce a warming effect, thereby promoting the regeneration of collagen in the bottom layer of the skin. When the controller 100 emits a carrier wave of 33 Hz through the EMS-PWM pin, it drives the MOS tube to work. The transformer outputs a low-frequency alternating current signal. When it acts on the skin, it will produce an electric stimulation feeling, achieving the effect of skin tightening.

[0046] Specifically, as Figure 5 shown, the EMS / RF control circuit 300 includes an EMS / RF power supply circuit, a transformer L4, an N-MOS tube Q15, and a triode Q17. It can be seen from Figure 5 that the EMS / RF power supply circuit includes an NPN-type triode Q5, a PMOS tube U7, a boost module U6, etc. The above-mentioned voltage stabilizing circuit provides voltage for the EMS / RF power supply circuit through the VBAT pin and is connected to the PMOS tube U7. The gate G of the PMOS tube U7 is connected to the enable terminal DCDC-EN of the controller 100 through the NPN-type triode Q5. The enable terminal DCDC-EN is connected to the base of the triode Q5 through a current-limiting resistor R38. The gate G of the PMOS tube U7 is connected to the collector of the triode Q5, and the emitter of the triode Q5 is grounded; the controller 100 controls the conduction and disconnection of the PMOS tube U7 by controlling the triode Q5. The PMOS tube U7 is used for protection and can protect the boost module U6 from being damaged. The drain D of the PMOS tube U7 is connected to the boost module U6 through a current-limiting resistor R47. The current is limited to I = 0.3 / R47 = 0.3 / 0.2 = 1.5 A. EC1 and C29 are filter capacitors. After passing through the boost module U6, the output voltage VOUT = 1.25(1 + R35 / R44) = 13.75 V. The VOUT is connected to the tap 8 of the transformer L4 to provide input voltage for the transformer.

[0047] The primary coil of the transformer L4 includes taps 6, 8, and 10. The output terminal VOUT of the boost module U6 is connected to the tap 8. The tap 10 of the transformer L4 is grounded. The tap 6 of the transformer L4 is connected to the N-MOS tube Q15; the secondary coil of the transformer L4 includes taps 3 and 6. The tap 3 is connected to the first contact point TB1, and the tap 6 is connected to the second contact point P2 for contacting the human body.

[0048] The controller 100 is connected to the gate of the N-MOS transistor Q15 through the EMS-PWM pin, and is used to output carrier signals with different frequencies to the transformer L4 through the N-MOS transistor Q15. The drain of the N-MOS transistor Q15 is connected to the tap 6 of the transformer L4, and the source of the N-MOS transistor Q15 is grounded through the current-limiting resistor R31. The N-MOS transistor is an N-channel MOS transistor.

[0049] In order to more accurately control the transmission power of the EMS / RF control circuit 300 so that it can dynamically adjust the transmission power according to the contact conditions of the first contact point TB1 and the second contact point P2 with the skin, an embodiment of the present invention further sets a detection point S1 at the source of the N-MOS transistor Q15 as the first detection signal output terminal and connects it to the CHECK P2 pin of the controller 100. The controller 100 can detect the electrical signal flowing through the second contact point P2 through CHECK P2, thereby obtaining the first detection signal. When the first detection signal obtained by the controller 100 is empty, it means that the second contact point P2 is not in contact with the skin; when the first detection signal is too large, it means that the second contact point P2 has less contact with the skin, and the transmission power needs to be increased; when the first detection signal is too small, it means that the second contact point P2 has more contact with the skin, and the transmission power needs to be decreased. Of course, the above control process can also be set in the opposite way, and specific settings are not limited.

[0050] Furthermore, since a reverse voltage is generated during the operation of the transformer, it is very easy to break down the MOS transistor. To further protect the MOS transistor, an embodiment of the present invention sets a diode D8 at the tap 10 of the transformer L4. The negative pole of the diode D8 is connected to the tap 10 of the transformer L4, and the positive pole is grounded. When the transformer generates a negative voltage, the diode D8 conducts, grounding the tap 10 of the transformer, avoiding the breakdown of the N-MOS transistor Q15 caused by the generation of negative voltage, thereby protecting the N-MOS transistor Q15.

[0051] When the controller 100 emits a low-frequency signal of 33HZ through the EMS-PWM pin, the transformer L4 outputs a low-frequency alternating current signal. When it acts on the skin, it will produce an electric stimulation feeling, achieving the effect of skin tightening. When the controller 100 emits a carrier wave of 1MHz through the EMS-PWM pin, it drives the MOS transistor to work, and the transformer outputs a high-voltage sine wave signal, generating a high-frequency signal. The high-frequency signal acting on the skin will produce a warming effect, thereby promoting the regeneration of collagen at the bottom layer of the skin.

[0052] Further, in order to further improve the effect of the controller 100 in transmitting the carrier signal, an NPN transistor Q17 is further added to the EMS / RF control circuit 300 in the embodiment of the present invention. As Figure 6 shown, the controller 100 is connected to the base of the NPN transistor Q17 through the pin RF-PWM, and is connected to the collector of the transistor Q17 through the tap 10 of the transformer L4. The emitter of the transistor Q17 is grounded. The controller 100 can alternately send a first frequency signal or a second frequency signal to the gate of the N-channel MOS transistor Q15 and the base of the NPN transistor Q17 at intervals through two pins, EMS-PWM and RF-PWM, so that the transformer has higher working efficiency.

[0053] Therefore, as can be seen from the above, the EMS / RF control circuit 300 provided by the embodiment of the present invention realizes the sharing of the EMS function and the RF function by the controller 100 transmitting different frequency signals, simplifying the circuit; at the same time, by setting the detection point S1, the controller 100 can obtain the contact degree between the second contact point P2 and the skin in real time, and thus can accurately adjust the transmission power; further, by setting a diode at the tap 10 of the transformer, the N-MOS is protected from being broken down, playing a very good protective role. Further, in order to make the transformer work efficiently, by setting two symmetrical carrier signal transmitting ends to transmit the carrier signal at intervals, the transformer has higher working efficiency.

[0054] Further, since the frequency of the carrier signal transmitted by the controller is relatively low during the EMS function, the electric signal flowing through the second contact point generated on the skin surface is relatively low, and the accuracy is often insufficient when detected through the first detection signal terminal. Therefore, the embodiment of the present invention further adds a second loop detection circuit. In Figure 7 it, the second loop detection circuit 600 includes a detection circuit composed of a PNP transistor Q18 and an NPN transistor Q19 to detect the electric signal flowing through the second contact point and output a second detection signal to improve the detection sensitivity of the second contact point P2. In Figure 7Among them, the second contact point P2 is electrically connected to the emitter of the PNP transistor Q18. The collector of the PNP transistor Q18 outputs a second detection signal to the controller 100 through the resistor R50. The base of the PNP transistor Q18 is connected to the collector of the NPN transistor Q19. The base of the NPN transistor Q19 is connected to the enable terminal DCDC EN of the controller 100. The emitter of the NPN transistor Q19 is grounded; the collector of the PNP transistor Q18 is connected to the CHECK P1 port of the controller 100 through the current-limiting resistor R50 and the pull-up resistor R53. At the same time, in order to prevent the current from flowing back and breaking down the PNP transistor Q18, the embodiment of the present invention also sets a diode D9 at the collector of the PNP transistor Q18. The negative electrode of the second diode D9 is connected to the collector of the PNP transistor Q18, and the positive electrode is grounded. Through the second loop detection circuit 600, when the controller 100 issues an enable signal through the DCDC EN port, the NPN transistor Q19 is turned on. When no electrical signal passes through the second contact point P2, the PNP transistor Q18 is in the cut-off state; when there is a current passing through the second contact point P2, even if it is a very weak signal, as long as the trigger condition of the emitter of the PNP transistor Q18 is satisfied, the PNP transistor Q18 will be turned on, and the second detection signal output terminal will output a second detection signal to the CHECK P1 port of the controller 100.

[0055] Through the above-mentioned second loop detection circuit 600, when the EMS / RF control circuit 300 is in the EMS mode, since the current flowing through the second contact point P2 is relatively weak, at this time, a current signal is generated at the second contact point P2. The current flowing through the second contact point P2 is adjusted for sensitivity through the second detection signal, the detection sensitivity is improved, and the second detection signal is output, so that the controller 100 can more accurately know the contact conditions of the first contact point TB1 and the second contact point P2 with the skin.

[0056] As can be seen from the above, by setting the second loop detection circuit 600, the problem that the current is too small under the EMS function and the detection is inaccurate is solved, so that the controller 100 can more accurately master the contact conditions of the first contact point TB1 and the second contact point P2 with the skin, and can more accurately control the EMS / RF control circuit 300.

[0057] Furthermore, the embodiment of the present invention also proposes a massager, which includes the EMS and RF function switching circuit proposed in the above embodiment. The specific structure diagram of the massager is as Figure 8As shown, based on the EMS function and RF function, the massager further adds a skin detection function, a vibration massage function, a cooling and heating function, and a photon function. Specifically, the massager includes: a controller 100, a switch circuit 200, an EMS / RF control circuit 300, a skin detection circuit 400, a first contact point TB1, a first loop detection circuit 500, a second contact point P2, a third contact point P1, a third loop detection circuit 700, and a third load circuit. The third load circuit includes a motor drive circuit 800, a buzzer 900, a Peltier drive circuit 1000, and a photon drive circuit 1100.

[0058] One end of the switch circuit 200 is electrically connected to the first contact point TB1 and the second contact point P2 respectively, and the other end is electrically connected to the EMS / RF control circuit 300 and the skin detection circuit 400 respectively under the control of the controller 100. The switch circuit 200 is an electrically controlled switch circuit 200, which is switched under the control of the controller 100. The switch circuit 200 can connect the first contact point TB1 and the second contact point P2 to the EMS / RF control circuit 300, or can electrically connect the first contact point TB1 and the second contact point P2 to the skin detection circuit 400, so that the EMS / RF control circuit 300 and the skin detection circuit 400 are in contact with the skin through the first contact point TB1 and the second contact point P2 respectively.

[0059] One end of the first contact point TB1 is connected to the switch circuit 200, and the other end is used to contact the human body and is connected to the first loop detection circuit 500. The first contact point TB1 is an exposed electrode, that is, the first loop detection circuit 500 can contact the human body through the first contact point TB1; the first loop detection circuit 500 is started or disconnected under the control of the controller 100, and is used to detect whether the first contact point TB1 contacts the human body; one end of the second contact point P2 is connected to the switch circuit 200, and the other end is used to contact the human body. The second contact point P2 is also an exposed electrode; the third contact point P1 is used to contact the human body and is connected to the third loop detection circuit 700. The third loop detection circuit 700 is electrically connected to the controller 100, and is used to detect a third detection signal between the first contact point TB1 and the third contact point P1, and send the third detection signal to the controller 100. The controller 100 controls the motor drive circuit 800, the buzzer 900, the Peltier drive circuit 1000, the photon drive circuit 1100, etc. according to the third detection signal.

[0060] The EMS / RF control circuit 300 is electrically connected to the controller 100, and emits an EMS signal or an RF signal under the control of the controller 100; the EMS / RF control circuit 300 is further configured to send a first detection signal flowing through the second contact point P2 to the controller 100. Since one end of the second contact point P2 is in contact with the human body and the other end is connected to the switch circuit 200, when the switch circuit 200 connects the second contact point P2 to the EMS / RF circuit, the EMS / RF circuit can detect the electrical signal flowing through the second contact point P2 and generate a first detection signal.

[0061] When the controller 100 controls the switch circuit 200 to electrically connect the first contact point TB1 and the second contact point P2 to the EMS / RF control circuit 300, the controller 100 receives the first detection signal and adjusts the EMS / RF control circuit 300 according to the first detection signal, that is, at this time, the controller 100 controls the EMS / RF circuit to operate. The first detection signal changes in real time with the magnitude of the facial impedance, and the change can also reflect the contact degree between the first contact point TB1 and the second contact point P2 and the skin, as well as the firmness of the skin. The EMS / RF control circuit 300 adjusts the transmission power of the EMS function or the RF function according to the first detection signal to process the skin with the optimal power.

[0062] When the controller 100 controls the switch circuit 200 to electrically connect the first contact point TB1 and the second contact point P2 to the skin detection circuit 400, the controller 100 controls the skin detection circuit 400, that is, the skin detection circuit 400 can be started to detect the skin. Due to the control of the switch circuit 200, the skin detection circuit 400 and the EMS / RF circuit can only be started separately, avoiding the conflict between the skin detection circuit 400 and the EMS / RF function.

[0063] When the controller 100 controls the switch circuit 200 to disconnect, the controller 100 starts the first loop detection circuit 500, obtains a third detection signal, and controls the third load circuit according to the third detection signal. When the third contact point P1 is in contact with the skin, the third loop detection circuit 700 obtains a third detection signal flowing through the third contact point P1, and judges whether there is contact with the skin through the third detection signal. When there is contact, the controller 100 starts the third load circuit. In this way, it is avoided that other functions are started without contacting the skin, wasting power and causing damage to the human body at the same time.

[0064] As can be seen from the above embodiments, the massager realizes the reasonable switching of the EMS / RF function, the skin detection function, and the third-party load function by setting the switch circuit 200, realizes the coordination and coexistence among various functions, reduces the complexity of the device, and avoids the mutual independence among multiple functions. At the same time, the controller 100 controls the EMS / RF control circuit 300 and the third load circuit respectively by obtaining the first detection signal and the third detection signal, realizes the precise scheduling of functions, and avoids power waste and damage to the human body.

[0065] As Figure 9 shown, the embodiments of the present invention will describe the massager in more detail. As Figure 9 shown, the switch circuit 200 is an electrically controlled double-pole double-throw switch. The midpoint of one path of the double-pole double-throw switch is connected to the first contact point TB1, and the midpoint of the other path is connected to the second contact point P2. At the same time, one throw of the double-pole double-throw switch is electrically connected to the EMS / RF control circuit 300, and the other throw is electrically connected to the skin detection circuit 400. That is, under the control of the controller 100, the switch circuit 200 can electrically connect the first contact point TB1 and the second contact point P2 to the EMS / RF control circuit 300, or can electrically connect the first contact point TB1 and the second contact point P2 to the skin detection circuit 400. Since it is a double-throw switch, the first contact point TB1 and the second contact point P2 can only be electrically connected to the EMS / RF control circuit 300 and the skin detection circuit 400 alternatively, and cannot be connected simultaneously.

[0066] One end of the first contact point TB1 is connected to one path of the double-pole double-throw switch, and the other end is connected to the first loop detection circuit 500 through the thyristor PCR606. The control electrode of the thyristor PCR606 is connected to the KG3 port of the controller 100 through the resistor R43. The controller 100 controls the on / off of the first thyristor through the control electrode, and thus can control the on / off of the first loop detection circuit 500. When the massager needs to start the third load circuit, the controller 100 controls the switch circuit 200 to disconnect the connections between the first contact point TB1 and the second contact point P2 and the EMS / RF control circuit 300 and the skin detection circuit 400, and turns on the thyristor PCR606 through the KG3 port. Then, the first loop detection circuit 500 is connected to the first contact point TB1. The controller 100 starts the first loop detection circuit 500 through the DR-PWM port to provide power for the first contact point TB1, so that an electrical signal can be formed between the first contact point TB1 and the third contact point P1, and the electrical signal between the first contact point TB1 and the third contact point P1 is detected to generate a third detection signal. The controller 100 receives the third detection signal through the CHECK S port and controls the third load circuit according to the third detection signal.

[0067] The controller 100 receives the first detection signal through the port CKECH P2, receives the second detection signal through the CHECK P1 port, receives the third detection signal through the CHECK S port, controls the EMS function of the EMS / RF control circuit 300 through the EMS-PWM port, controls the RF function of the EMS / RF control circuit 300 through the RF-PWM port, and controls the skin detection circuit 400 through the HZ port. The third load circuit includes circuits with various other functions.

[0068] It can be seen from Figure 8 this that in addition to the EMS and RF functions, the massager also includes functions such as skin detection, vibration massage, cooling and heating, and photon functions. The above-mentioned multiple functional modules form a massager with complete functions, cleverly realizing the switching and combination of various functions, simplifying the structure of the massager, and integrating the original multiple independent devices into a device with complete functions. The skin detection function, vibration massage function, cooling and heating function, and photon function will be described in detail below.

[0069] Figure 10AThe circuit diagram of the skin detection circuit 400 proposed by the embodiment of the present invention is shown. The skin detection circuit 400 is mainly used for measuring the moisture of human skin, can obtain the condition of the skin, and then adjust the EMS / RF function or other third-party load functions according to the skin condition. The skin detection circuit 400 includes a voltage follower circuit, a skin contact point, and an AD detection circuit.

[0070] The skin contact points are the first contact point TB1 and the second contact point P2; the skin detection circuit 400 is connected through the contact point 4 and the second contact point P2, connected to the first contact point TB1 through the contact point 5, and contacts the skin through the first contact point TB1 and the second contact point P2. The contact point 4 is the input end of the AD detection circuit, and the contact point 5 is the output end of the voltage follower circuit.

[0071] The circuit structure of the voltage follower circuit is as Figure 10A shown. The voltage follower circuit includes a current limiting resistor R62 and a single operational amplifier U9A. The square wave signal is input to the single operational amplifier U9A through the current limiting resistor R62. The output end of the single operational amplifier U9A is connected to the first contact point TB1. When the controller 100 outputs a carrier signal through the HZ pin, after passing through the voltage follower circuit, a signal with the same waveform is output at the first contact point TB1 and reaches the skin.

[0072] The AD detection circuit includes an isolation capacitor C24, a filter capacitor C26, and a diode D11. One end of the second contact point P2 is connected to the isolation capacitor C24. The other end of the isolation capacitor C24 is connected to the positive electrode of the diode D11. The negative electrode of the diode D11 is connected to a filter circuit composed of a resistor R63 and C26 and is connected to the FZ_AD pin of the controller 100 to output a skin detection result to the controller 100.

[0073] The specific skin detection process is as follows: the controller 100 outputs a 4KHZ square wave to the voltage follower circuit through the HZ pin. The voltage follower circuit generates a signal with the same waveform as the input signal at the first contact point TB1, and applies the output signal to the contacted skin. Due to the capacitive reactance characteristic of the skin, a sharp waveform will be formed at the second contact point. After this waveform passes through the AD detection circuit, a stable FZ_AD signal is output. The simulation effect is as Figure 10B shown. This simulation waveform shows that the 4KHZ square wave signal passes through the detection circuit and the human skin and finally outputs a DC signal, and the output voltages obtained for different human impedances are different.

[0074] In the actual skin measurement process, due to the fact that the impedance characteristics of human tissues are much more complex than those of general objects, the most obvious feature is that the impedance value changes with the measurement frequency. Because the intracellular fluid tissue of human cells does not simply exhibit the characteristics of resistance, the interaction between intracellular water and cell membranes exists more in the form of capacitance characteristics. In order to analyze more skin characteristics and obtain multi-frequency point information, the embodiments of the present invention adopt a square wave pulse signal as the excitation source, which is easy to combine with digital circuits and has a relatively wide frequency spectrum. As shown in Figure 10C, it is the curve of moisture corresponding to the AD value collected, showing the corresponding relationship between the voltage value and the moisture content. As Figure 10D shown, it is the water-oil comparison curve obtained through AD detection. By performing corresponding algorithms based on the curve, the water-oil characteristics of human skin can be measured, thereby reflecting skin characteristics such as oily, dry, and combination skin of the human body. Different gear functions are enabled according to different skin characteristics, so as to better achieve the effect of improving the skin.

[0075] Therefore, as can be seen from the above, the skin measurement circuit 400 proposed in the embodiments of the present invention, by setting a voltage follower circuit and an AD detection circuit, the controller 100 transmits a square wave signal to the voltage follower circuit, which is applied to the human skin, and the AD detection circuit detects the signal generated by the human skin, accurately reflecting the condition of the human skin, enabling the controller 100 to adjust the EMS / RF control circuit 300 or other third-party load circuits according to the detection results, and being able to implement skin care more precisely.

[0076] Furthermore, in actual applications, the EMS / RF function and the skin measurement function need to be separated and cannot be turned on simultaneously. How to coordinate the usage time between the two is a very important issue, and it is necessary to effectively prevent damage to the skin caused by users' incorrect operations. As Figure 10AAs shown, in the embodiment of the present invention, a switch circuit 200 is provided to coordinate the EMS / RF function and the skin detection function. The switch circuit 200 is an electrically controlled double-pole double-throw switch. The midpoint 3 of one switch path is connected to the first contact point TB1, and the midpoint 6 of the other switch path is connected to the second contact point P2. One throw of the switch circuit 200 includes contact point 2 and contact point 7; the other throw includes contact point 5 and contact point 4. The controller 100 is connected to the switch controller 100YX-JDQ through pins KG1 and KG2. When KG1 = 0 and KG2 = 1, the 2nd pin and the 3rd pin of the double-pole double-throw switch are connected, and the 7th pin and the 6th pin are connected. The first contact point TB1 and the second contact point P2 contact both sides of the human skin, conducting the EMS / RF control circuit 300. At the same time, the skin detection circuit 400 is disconnected. When KG1 = 1 and KG2 = 0, the 5th pin and the 3rd pin of the double-pole double-throw switch are connected, and the 4th pin and the 6th pin are connected. The first contact point TB1 and the second contact point P2 contact both sides of the human skin, conducting the skin detection circuit 400. At the same time, the EMS / RF control circuit 300 is disconnected, enabling the skin detection function. Of course, the double-pole double-throw switch can appear in the form of a relay or be operated in other electrical switch manners, which are not limited here.

[0077] As can be seen from the above, in the embodiment of the present invention, by setting the switch circuit 200, the scheduling of the EMS / RF control circuit 300 and the skin detection circuit 400 is conveniently realized, preventing simultaneous activation caused by user misoperation and thus avoiding harm to the skin.

[0078] Furthermore, when the EMS / RF control circuit 300 function is turned off and the controller 100 needs to activate a third-party load function, such as the photon detection function, it is also necessary to detect whether the first contact point TB1 or the second contact point P2 is in contact with the human skin. If other third-party load functions are activated without skin contact, it may cause harm to the human body. Therefore, the embodiment of the present invention further proposes a circuit structure diagram of a skin contact judgment circuit, as Figure 11 shown, showing the first loop detection circuit 500 and the third loop detection circuit 700 diagrams for detecting whether the contact points are in contact with the skin.

[0079] As Figure 11As shown, the skin contact determination circuit includes a first loop detection circuit 500 and a third loop detection circuit 700. The first loop detection circuit 500 includes a PNP transistor Q13, an NPN transistor Q16, and a thyristor PCR606. The base of the NPN transistor Q16 is connected to the DR-PWM pin of the controller 100 through a current-limiting resistor R39 for receiving the control signal of the controller 100. The emitter of the NPN transistor Q16 is grounded, and the collector is connected to the base of the PNP transistor Q13 through a resistor R36. The emitter of the PNP transistor Q13 is connected to a 3.3V voltage, and the collector is connected to one end of the thyristor PCR606 through a resistor R17. The other end of the thyristor PCR606 is connected to the first contact point TB1 and one end is connected to the collector of the PNP transistor Q13. The control electrode of the thyristor is electrically connected to the KG3 port of the controller 100. When the controller 100 sends a high-level signal through the DR-PWM port and at the same time controls the thyristor PCR606 to conduct through the KG3 port, the PNP transistor Q13 and the NPN transistor Q16 in the first loop detection circuit 500 conduct, providing a voltage signal for the first contact point TB1.

[0080] The third loop detection circuit 700 includes a third contact point P1, a pull-up resistor R60, and a capacitor C7. The CHECK S port of the controller 100 is directly connected to the third contact point P1 for receiving a third detection signal.

[0081] When the controller 100 needs to activate the photon function, the controller 100 outputs a control signal through the DR-PWM port. As shown in the figure above, the first contact point TB1 touches the human face, the third contact point P1 is the hand electrode piece for the hand-held end. DR-PWM controls the conduction and cut-off of the NPN transistor Q16. Q13 is a PNP transistor. When DR-PWM is at a high level, the Q16 transistor conducts, and at the same time the Q13 transistor conducts. R1 is a current-limiting resistor and a voltage-dividing resistor. PCR606 is a unidirectional thyristor. When KG3 is at a high level, the thyristor conducts, and the voltage reaches the face. When the hand touches the P1 electrode piece, the CHECK-S has a voltage of about 1.65V. The system then determines that the hand and the face are in contact with the skin at the same time, and at this time, the corresponding load is turned on. Thereby, the photon drive circuit 1100 is activated to prevent direct eye damage when the photon is turned on; or the vibration massage function is activated to give a sense of intelligence; the Peltier kinetic energy can also be activated. Other functions are enabled through the first loop detection circuit 500 and the third loop detection circuit 700, which has higher safety and anti-mis-trigger functions.

[0082] In Figure 12Among them, it is the photon drive circuit 1100. The photon drive circuit 1100 includes NPN transistors Q8, Q9, a red LED lamp LED-R, and a yellow LED lamp LED-Y. The JP1 is the drive board. The drive board is connected to a 3.3V voltage. The base of the transistor Q8 is connected to the LED-R through a resistor R19 for driving the LED lamp. The collector is connected to the drive board JP1, and the emitter is grounded through a resistor R23. The base of the transistor Q9 is connected to the LED-Y through a resistor R20 for driving the LED lamp. The collector is connected to the drive board JP1, and the emitter is grounded through a resistor R20. Therefore, in the embodiment of the present invention, by combining the first loop detection circuit 500, the third loop detection circuit 700, and the photon drive circuit 1100, before starting the photon drive circuit 1100, first, the first loop detection circuit 500 and the third loop detection circuit 700 are used to determine whether the first contact point TB1 and the third contact point P1 are in contact with the human skin. Only when in contact with the human skin, the photon drive circuit 1100 is started, avoiding harm to the human body.

[0083] Further, the massager further includes a Peltier drive circuit 1000, as Figure 12 and Figure 13 shown, Figure 13 is the Peltier drive circuit 1000, Figure 12 which includes an NTC detection circuit. The Peltier drive circuit 1000 is used to warm or cool the human skin, which helps to enlarge and contract the pores of the skin and can play a very good role in tightening the skin.

[0084] As Figure 13 shown, the Peltier circuit is a bridge drive circuit, including NPN transistors Q3 and Q4, P-MOS transistors Q1 and Q2, and N-MOS transistors Q10 and Q11. The Q1, Q2, Q10, and Q11 form a bridge drive circuit. The controller 100 controls the Peltier drive circuit 1000 through the PET+ and PET- ports. Among them, J12PIN is the thermoelectric cooler. The thermoelectric cooler is a thermocouple. When current passes through the thermocouple, one node dissipates heat while the other node absorbs heat. Therefore, heating and cooling effects can be achieved.

[0085] PET+ and PET- are respectively applied to both sides of the thermoelectric cooler to produce the effects of refrigeration and heating. By controlling PET+ and PET- and the temperature sensors at both ends of the Peltier through the PWM waveform, the effect of precise temperature control is achieved. The base of the NPN transistor Q3 is connected to the controller, and the collector of the NPN transistor Q3 is connected to the gate of the P-channel MOS transistor Q2; the drain of the P-channel MOS transistor Q2 is connected to the thermoelectric cooler; the drain of the N-channel MOS transistor Q10 is connected to the thermoelectric cooler, and the gate of the N-channel MOS transistor Q10 is connected to the controller. The base of the NPN transistor Q4 is connected to the controller, and the collector of the NPN transistor Q4 is connected to the gate of the P-channel MOS transistor Q1; the drain of the P-channel MOS transistor Q1 is connected to the thermoelectric cooler; the drain of the N-channel MOS transistor Q11 is connected to the thermoelectric cooler, and the gate of the N-channel MOS transistor Q11 is connected to the controller. The source of the N-channel MOS transistor Q11 is connected to the source of the N-channel MOS transistor Q10 and grounded through the current detection resistor R13.

[0086] When the controller 100 outputs a control signal to the NPN transistor Q3 through the resistor R7 at the output terminal PET-, and outputs a control signal to the N-MOS transistor Q10 at the output terminal PET-, Q3, Q2, and Q10 are turned on, and PET- acts on one side of the thermoelectric cooler, thereby cooling one side of J12PIN and achieving the refrigeration effect. When the controller 100 outputs a control signal to the NPN transistor Q4 through the resistor R9 at the output terminal PET+, and outputs a control signal to the N-MOS transistor Q11 at the output terminal PET+, Q4, Q1, and Q11 are turned on, and PET+ acts on the other side of the thermoelectric cooler, thereby heating J12PIN and achieving the heating effect. Of course, it is also possible to apply PET+ to the refrigeration side and PET- to the heating side, both of which can make the thermoelectric cooler produce the refrigeration or heating effect.

[0087] Furthermore, in order to adjust the temperature more accurately, in the embodiment of the present invention, a current detection resistor R13 is provided between the sources of Q11 and Q10, and a temperature detection point is provided between R13 and the source and connected to the CHECKWEN pin of the controller 100. The controller 100 can detect the current driven by the Peltier by detecting the voltage of CHECKWEN. When controlling the temperature, precise temperature measurement can be achieved by adjusting the duty cycle of the PWM waveform of PET+ / PET- in combination with the detected current.

[0088] At the same time, in order to further protect the Peltier circuit, the embodiment of the present invention also adds an NTC protection function. When the temperature is too high, heating is stopped. As Figure 12As shown, embodiments of the present invention are provided with thermistors R17 and R18 to detect the temperature of the Peltier circuit. When the temperature is too high, the controller 100 adjusts the Peltier circuit.

[0089] As Figure 12 shown, the thermistors R17 and R18 are usually arranged together with the Peltier circuit to measure the temperature of the Peltier circuit. One end of the thermistor R17 is connected to the drive board JP1, and the other end is grounded through the capacitor C6. A temperature output point is set between the R17 and C6 and connected to the NTC1 pin of the controller 100. One end of the thermistor R18 is connected to the drive board JP1, and the other end is grounded through the capacitor C5. A temperature output point is set between the R18 and C7 and connected to the NTC2 pin of the controller 100. The NTC1 and NTC2 are respectively arranged on both sides of the refrigeration chip to collect the temperature of the refrigeration chip.

[0090] Therefore, in summary, the Peltier drive circuit 1000 proposed in the embodiments of the present invention, in combination with the first loop detection circuit 500 and the third loop detection circuit 700, only starts the Peltier circuit to heat or cool the skin when the controller 100 detects that the first contact point TB1 and the third contact point P1 are in contact with the human body, avoiding useless work and saving power. At the same time, temperature detection points are set to achieve precise control of the temperature of the Peltier drive circuit 1000. Further, by setting the NTC detection circuit, the problem of overheating of the Peltier circuit is avoided.

[0091] Further, as Figure 14A and 14B shown, the present invention also provides a massage function. The massage module includes a motor drive circuit 800 and a buzzer circuit. The motor drive circuit 800 and the buzzer circuit cooperate with the first loop detection circuit 500 and the third loop detection circuit 700. When the controller 100 determines that the first contact point TB1 and the third contact point P1 are in contact with the human body, the motor drive circuit 800 and the buzzer circuit can be started.

[0092] Specifically, the motor drive circuit 800 is as Figure 14A shown and includes an NPN-type triode Q6 and a motor DJ1. The base of the triode Q6 is connected to the Motor pin of the controller 100 through a current-limiting resistor R12. The collector of the triode Q6 is connected to the motor DJ1 to drive the motor to vibrate and stop. The buzzer 900 circuit is as Figure 14BAs shown, it includes an NPN transistor Q7 and a buzzer BUZ1. The base of the NPN transistor Q7 is connected to the BUZZER pin of the controller 100 through a current-limiting resistor R14, and the collector is connected to the buzzer BUZ1. The controller 100 outputs a 4KHz waveform to drive the buzzer 900 to operate.

[0093] Therefore, in summary, the motor drive circuit 800 and the buzzer circuit proposed in the embodiments of the present invention, in combination with the first detection circuit and the third loop detection circuit 700, only start the drive circuit and the buzzer 900 to massage the skin when the controller 100 detects that the first contact point TB1 and the third contact point P1 are in contact with the human body, avoiding useless work and saving power.

[0094] It should be noted that unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present invention should have the ordinary meaning understood by those skilled in the art to which the embodiments of the present invention belong.

[0095] In the description of the embodiments of the present invention, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present invention.

[0096] In addition, technical terms such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the embodiments of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0097] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0098] In the description of the embodiments of the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely means that the horizontal height of the first feature is less than that of the second feature.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An EMS and RF function switching circuit, characterized in that, Comprising: A controller, a switch circuit, an EMS / RF control circuit, a first contact point, and a second contact point; One end of the switch circuit is electrically connected to the first contact point and the second contact point respectively, and the other end is electrically connected to the EMS / RF control circuit under the control of the controller; the switch circuit is an electrically controlled double-pole switch; The first contact point and the second contact point are used to contact the human body; The EMS / RF control circuit is electrically connected to the controller, and is used to receive the first frequency signal sent by the controller and start the EMS function according to the first frequency signal; the EMS / RF control circuit is also used to receive the second frequency signal sent by the controller and start the RF function according to the second frequency signal; The controller is used to obtain a first detection signal flowing through the second contact point, and adjust the transmission power of the first frequency signal and the second frequency signal according to the first detection signal.

2. The EMS and RF function switching circuit according to claim 1, characterized in that, Further comprising a second loop detection circuit; The second loop detection circuit is electrically connected to the second contact point, detects the current signal flowing through the second contact point, and outputs a second detection signal to the controller; The controller adjusts the transmission power of the first frequency signal and the second frequency signal according to the second detection signal.

3. The EMS and RF function switching circuit according to claim 2, characterized in that, The second loop detection circuit includes a PNP type triode Q18 and an NPN type triode Q19; The emitter of the PNP type triode Q18 is connected to the second contact point, the base of the PNP type triode Q18 is electrically connected to the collector of the NPN type triode Q19, and the collector of the PNP type triode Q18 is connected to the controller for outputting a second detection signal to the controller; The base of the NPN type triode Q19 is electrically connected to the enable terminal of the controller; The controller sends an enable signal to the NPN type triode Q19. When an electric signal passes through the second contact point, the PNP type triode Q18 is triggered and sends a second detection signal to the controller.

4. The EMS and RF function switching circuit according to claim 1, characterized in that, The EMS / RF control circuit includes an N-channel MOS transistor, and a first detection signal output terminal is provided at the source of the N-channel MOS transistor; The controller is used to obtain a first detection signal flowing through the second contact point through the first detection signal output terminal.

5. The EMS and RF function switching circuit according to claim 4, characterized in that, The EMS / RF control circuit includes an N-channel MOS transistor Q15; The gate of the N-channel MOS transistor Q15 is electrically connected to the controller; The source of the N-channel MOS transistor Q15 is provided with a first detection signal output terminal for detecting the electric signal flowing through the second contact point; The controller obtains a first detection signal through the first detection signal output terminal, and controls the transmission power of the first frequency signal and the second frequency signal sent to the gate of the N-channel MOS transistor Q15 according to the first detection signal.

6. The EMS and RF function switching circuit according to claim 5, characterized in that, The EMS / RF control circuit includes a transformer L4; The tap 6 of the primary coil of the transformer L4 is connected to the drain of the N-channel MOS transistor Q15; the tap 10 of the primary coil of the transformer L4 is connected to the negative electrode of the diode D8.

7. The EMS and RF function switching circuit according to claim 6, characterized in that, The EMS / RF control circuit includes an NPN transistor Q17; The collector of the NPN transistor Q17 is connected to tap 10 of the transformer L4, and the base of the NPN transistor Q17 is electrically connected to the controller; The controller is configured to send the first frequency signal or the second frequency signal to the gate of the N-channel MOS transistor Q15 and the base of the NPN transistor Q17, respectively.

8. The EMS and RF function switching circuit according to claim 7, characterized in that, The controller intermittently sends the first frequency signal or the second frequency signal to the gate of the N-channel MOS transistor Q15 and the base of the NPN transistor Q17.

9. The EMS and RF function switching circuit according to claim 1, characterized in that, The EMS / RF control circuit includes an NPN transistor Q5, a PMOS transistor U7, and a boost module U6; The base of the NPN transistor Q5 is electrically connected to the enable terminal of the controller, the collector of the NPN transistor Q5 is electrically connected to the gate of the PMOS transistor U7, and the NPN transistor Q5 is used to control the on / off of the PMOS transistor U7; The drain of the PMOS transistor U7 is electrically connected to the boost module U6.

10. A massager, characterized in that, It includes the EMS and RF function switching circuit according to any one of claims 1-9.

Images