Multifunctional switching circuit and massager

Abstract

Embodiments of the present invention relate to the technical field of switching circuits and disclose a multifunctional switching circuit and massager. The multifunctional switching circuit, by providing a switching circuit, achieves reasonable switching between the EMS / RF function and the skin testing function, enabling coordination and coexistence between the various functions, reducing device complexity, and avoiding the mutual independence of multiple functions. Furthermore, the controller controls the EMS / RF control circuit by obtaining a first detection signal, achieving precise scheduling of functions and avoiding power waste and harm to the human body.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of switching circuits, and in particular to a multifunctional switching circuit and a massager. Background Art

[0002] With the rapid development of technology and the continuous improvement of life, more and more women have a strong pursuit of beauty. To meet this demand, some have invented ultrasonic beauty devices for body shaping, while others have invented dynamic light beauty devices for acne treatment, whitening, and wrinkle removal. Some have designed RF radio frequency devices to stimulate the regeneration of collagen in the underlying skin, achieving skin tightening effects.

[0003] During the research process, the inventors of the present application found that the existing multi-functional beauty devices have relatively single functions. When users use them, they often need to use a combination of multiple devices, which is relatively costly and inconvenient to carry. Summary of the Invention

[0004] In view of the above problems, an embodiment of the present invention provides a multifunctional switching circuit and a massager, which are used to solve the problem in the prior art that multiple devices need to be used in combination.

[0005] According to one aspect of an embodiment of the present invention, there is provided a multifunctional switching circuit, the multifunctional switching circuit comprising: a controller, a switching circuit, an EMS / RF control circuit, a skin detection circuit, a first contact point and a second contact point;

[0006] 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 and the skin detection circuit respectively under the control of the controller;

[0007] One end of the first contact point is connected to the switch circuit, and the other end is used to contact the human body;

[0008] One end of the second contact point is connected to the switch circuit, and the other end is used to contact the human body;

[0009] The EMS / RF control circuit is electrically connected to the controller and sends an EMS signal or an RF signal under the control of the controller; the EMS / RF control circuit is further configured to send a first detection signal flowing through the second contact point to the controller 100;

[0010] When the controller controls the switch circuit to electrically connect the first contact point and the second contact point to the EMS / RF control circuit, the controller receives the first detection signal and adjusts the EMS / RF control circuit according to the first detection signal;

[0011] When the controller controls the switch circuit to electrically connect the first contact point and the second contact point to the skin detection circuit, the controller controls the skin detection circuit.

[0012] According to another aspect of an embodiment of the present invention, a massager is provided, comprising the multifunctional switching circuit described in the above embodiment.

[0013] As can be seen from the above embodiments, the multifunctional switching circuit, by providing a switch circuit, achieves reasonable switching between the EMS / RF function and the skin testing function, achieving coordination and coexistence between the various functions, reducing the complexity of the device and avoiding the mutual independence of multiple functions. Furthermore, the controller controls the EMS / RF control circuit by obtaining the first and second detection signals, achieving precise scheduling of functions and avoiding power waste and harm to the human body.

[0014] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0016] Figure 1 shows a functional framework diagram of a multifunctional switching circuit provided by an embodiment of the present invention;

[0017] Figure 2 shows a functional framework diagram of another multi-function switching circuit provided by an embodiment of the present invention;

[0018] Figure 3 A circuit diagram of a multifunctional switching circuit provided by an embodiment of the present invention is shown;

[0019] Figure 4 shows a functional framework diagram of another multi-function switching circuit provided by an embodiment of the present invention;

[0020] Figure 5A shows a circuit diagram of a controller provided by an embodiment of the present invention;

[0021] Figure 5B shows a voltage stabilizing circuit diagram provided by an embodiment of the present invention;

[0022] Figure 6 FIG2 shows an EMS / RF control circuit diagram provided by an embodiment of the present invention;

[0023] Figure 7A FIG1 shows a skin detection circuit diagram provided by an embodiment of the present invention;

[0024] Figure 7B shows a simulation diagram of the output of a skin detection circuit provided by an embodiment of the present invention;

[0025] Figure 7C Shows the moisture value curve of the skin test results provided by an embodiment of the present invention;

[0026] Figure 7D A water-oil curve diagram of the skin test results provided by an embodiment of the present invention is shown;

[0027] Figure 8 The second loop detection circuit diagram provided by the embodiment of the present invention is shown;

[0028] Figure 9 Shows a first loop detection circuit and a third loop detection circuit provided by an embodiment of the present invention;

[0029] Figure 10 shows a photon driving circuit diagram provided by an embodiment of the present invention;

[0030] Figure 11 shows a Peltier driving circuit diagram provided by an embodiment of the present invention;

[0031] Figure 12A shows a motor driving circuit diagram provided by an embodiment of the present invention;

[0032] Figure 12B The figure shows a buzzer circuit diagram provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following 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 are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0034] See also Figure 1 , Figure 1 The functional framework diagram of the multifunctional switching circuit proposed in an embodiment of the present invention is shown. The multifunctional switching circuit includes: a controller 100, a switching circuit 200, an EMS / RF control circuit 300, a skin detection circuit 400, a first contact point TB1 and a second contact point P2.

[0035] 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 that switches 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 respectively contact the skin through the first contact point TB1 and the second contact point P2.

[0036] One end of the first contact point TB1 is connected to the switching circuit 200, and the other end is used to contact the human body. The first contact point TB1 is an exposed electrode; one end of the second contact point P2 is connected to the switching circuit 200, and the other end is used to contact the human body. The second contact point P2 is also an exposed electrode.

[0037] The EMS / RF control circuit 300 is electrically connected to the controller 100 and, under the control of the controller 100, emits an EMS signal or an RF signal. The EMS / RF control circuit 300 is also configured to transmit a first detection signal flowing through the second contact point P2 to the controller 100. Because the second contact point P2 is in contact with the human body at one end and connected to the switch circuit 200 at the other end, when the switch circuit 200 connects the second contact point P2 to the EMS / RF circuit, the EMS / RF circuit detects the electrical signal flowing through the second contact point P2 and generates a first detection signal.

[0038] 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 based on the first detection signal. At this point, the controller 100 controls the EMS / RF circuit to operate. The first detection signal changes in real time with the magnitude of facial impedance, and this change can also reflect the degree of contact 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 RF function based on the first detection signal to treat the skin with optimal power.

[0039] 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, thereby activating the skin detection circuit 400 for skin testing. Due to the control of the switch circuit 200, the skin detection circuit 400 and the EMS / RF circuit can only be activated separately, thus avoiding conflicts between the skin detection circuit 400 and the EMS / RF circuit.

[0040] As can be seen from the above embodiment, the multi-function switching circuit, by providing a switch circuit 200, achieves proper switching between the EMS / RF function and the skin testing function, enabling coordination and coexistence between the various functions, reducing device complexity, and avoiding the mutual independence of multiple functions. Furthermore, the controller 100 controls the EMS / RF control circuit 300 by acquiring the first and second detection signals, achieving precise scheduling of functions and avoiding power waste and harm to the human body.

[0041] Furthermore, the embodiments of the present application are Figure 1 Based on this, we further added the control of the third load circuit, please refer to Figure 2 , Figure 2 FIG. 2 shows a functional framework diagram of a multifunctional switching circuit according to an embodiment of the present invention. The multifunctional switching circuit includes a controller 100, a switching 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.

[0042] 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 that switches 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 respectively contact the skin through the first contact point TB1 and the second contact point P2.

[0043] 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 is in contact with 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.

[0044] The EMS / RF control circuit 300 is electrically connected to the controller 100 and, under the control of the controller 100, emits an EMS signal or an RF signal. The EMS / RF control circuit 300 is also configured to transmit a first detection signal flowing through the second contact point P2 to the controller 100. Because the second contact point P2 is in contact with the human body at one end and connected to the switch circuit 200 at the other end, when the switch circuit 200 connects the second contact point P2 to the EMS / RF circuit, the EMS / RF circuit detects the electrical signal flowing through the second contact point P2 and generates a first detection signal.

[0045] 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 based on the first detection signal. At this point, the controller 100 controls the EMS / RF circuit to operate. The first detection signal changes in real time with the magnitude of facial impedance, and this change can also reflect the degree of contact 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 RF function based on the first detection signal to treat the skin with optimal power.

[0046] 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, thereby activating the skin detection circuit 400 for skin testing. Due to the control of the switch circuit 200, the skin detection circuit 400 and the EMS / RF circuit can only be activated separately, thus avoiding conflicts between the skin detection circuit 400 and the EMS / RF circuit.

[0047] When the controller 100 controls the switch circuit 200 to be disconnected, the controller 100 activates the first loop detection circuit 500, obtains a third detection signal, and controls the third load circuit based on the third detection signal. When the third contact point P1 contacts the skin, the third loop detection circuit 700 obtains the third detection signal flowing through the third contact point P1, and determines whether contact with the skin is made based on the third detection signal. If contact is made, the controller 100 activates the third load circuit. This avoids activating other functions when there is no contact with the skin, which would waste power and cause harm to the human body.

[0048] As can be seen from the above embodiment, the multifunctional switching circuit, by providing a switch circuit 200, achieves reasonable switching between the EMS / RF function, the skin test function, and the third-party load function, achieving coordination and coexistence between the various functions, reducing the complexity of the device and avoiding the mutual independence of multiple functions. Simultaneously, the controller 100 controls the EMS / RF control circuit 300 and the third load circuit respectively by obtaining the first and third detection signals, achieving precise scheduling of functions and avoiding power waste and harm to the human body.

[0049] Further, such as Figure 1 and Figure 2As shown, the EMS / RF control circuit 300 includes two functions: EMS and RF. The RF function is a crucial component of the electromagnetic spectrum. Both radio and microwave energy fall within the category of electromagnetic radiation, commonly referred to as radio frequency. Radio frequency is measured in frequency, ranging from hundreds of kHz to hundreds of MHz. When radio frequency is activated, it can change the polarity of the electric field within biological tissue millions of times per second. Charged tissue particles within the electric field change their polarity at a constant frequency. The natural impedance of the dermis resists the movement of electrons, generating heat. The friction caused by this electron movement creates a columnar heating effect deep within the skin. This thermal effect initially alters collagen, causing it to contract, which in turn leads to the regeneration of new collagen, leading to dermal reconstruction and thickening. The EMS function stands for Electrical Muscle Stimulation, or muscle current stimulation in Chinese. Its principle is to directly stimulate motor nerves with an external electric current, inducing muscle contraction, thereby directly and effectively achieving muscle growth or body shaping. Low-frequency currents can effectively and continuously activate muscles. If the frequency is higher than a certain level, muscle tension begins to decrease. Muscles cannot meet their neurophysiological requirements, and the desired training effect cannot be achieved. Furthermore, muscles use energy and consume oxygen during exercise.

[0050] Therefore, it can be seen from the above that when the EMS / RF control circuit operates in EMS mode, the input circuit frequency is relatively low, and errors often occur when measuring the electrical signal passing through the second contact point P2, resulting in inaccurate measurement and an inability to accurately control the EMS / RF control circuit 300. The present embodiment further proposes providing a second loop detection circuit 600; the second loop detection circuit 600 is electrically connected to the second contact point P2 and detects the electrical signal passing 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 based on the second detection signal. The second loop detection circuit 600 more sensitively detects the electrical signal passing through the second contact point P2, enabling more accurate determination of the contact status between the second contact point P2 and the skin. The controller 100 more accurately controls the EMS / RF control circuit 300 based on the second detection signal.

[0051] like Figure 3 As shown, the embodiment of the present invention provides a more detailed description of the multifunctional switching circuit. Figure 3As shown, the switching circuit 200 is an electrically controlled double-pole double-throw switch, wherein the middle point of one path of the double-pole double-throw switch is connected to the first contact point TB1, and the middle point 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 switching 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 at the same time, and cannot be connected at the same time.

[0052] One end of the first contact point TB1 is connected to one of the paths 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 and off of the first thyristor through the control electrode, and thereby controls the on and off of the first loop detection circuit 500. When the multi-function switching circuit needs to start the third load circuit, the controller 100 controls the switch circuit 200 to disconnect the first contact point TB1 and the second contact point P2 from the EMS / RF control circuit 300 and the skin detection circuit 400, and opens 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 and provides power to 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. 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.

[0053] The controller 100 receives the first detection signal through the port CKECK P2, receives the second detection signal through the port CHECK P1, receives the third detection signal through the port CHECK S, and 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, such as Figure 4 shown.

[0054] like Figure 4 As shown, the multifunctional switching circuit includes not only the EMS / RF control circuit 300 and the skin detection circuit 400, but also the third load circuit comprising a massage circuit comprising a motor drive circuit 800 and a buzzer 900, a cooling and heating circuit comprising a Peltier drive circuit 1000, and a photon whitening circuit comprising a photon drive circuit 1100. These various functional modules form a fully functional massager. All of these functional modules are combined through the multifunctional switching circuit, cleverly enabling the switching and combination of various functions. This simplifies the massager's structure and integrates multiple independent devices into a single, fully functional device.

[0055] In order to explain the multifunctional switching circuit in more detail, the implementation of the EMS / RF control circuit 300, the skin detection circuit 400, the photon driving circuit 1100, the Peltier circuit and the massage circuit will be described below respectively.

[0056] like Figure 5A As shown in FIG. 1 , a circuit diagram of a controller 100 provided in an embodiment of the present invention is provided. The controller 100 may be a commonly used programmable controller 100 such as a PLC, a digital processing chip DSP, or a single chip microcomputer. In this embodiment, an STM32F030R8T6 programmable control chip is used as the controller 100. The specific pins are as follows: Figure 5AAs shown, it includes signal input pins, signal output pins, and input and output pins, etc., for example: DCDC EN pin: the controller 100 acts as an enable terminal to enable each control unit; RF-PWM pin: as an RF control signal output terminal, connected to the EMS / RF control circuit 300; EMS-PWM pin: as an EMS control signal output terminal, connected to the EMS / RF control circuit 300; DR-PWM pin: used to output a control signal to the first loop detection circuit 500; HZ pin: used to output a control signal to the skin detection circuit 400; KG1 and KG2 pins: used to output a control signal to the switch circuit 200; KG3 pin: used to control the on and off of the thyristor; CHECK P1 pin: used to receive the second detection signal; CHECK P2 pin: used to receive the first detection signal; CHECK S Pin: for receiving the third detection signal; Motor pin: for outputting a control signal to the motor drive circuit 800; BUZZER pin: for outputting a control signal to the buzzer 900; PET+ and PET- pins: for outputting temperature control signals to the Peltier circuit; CHECK WEN pin: for detecting the Peltier current; NTC1 and NTC2 pins: for detecting temperature information; etc. More specific and detailed descriptions of the chip pins are not given here. Those skilled in the art can select appropriate pins for control as needed. Hereinafter, when specific pins are used, their pin names will be directly referenced, and can be directly understood as being connected to the pins of the controller 100. The corresponding relationship between these pins and the controller 100 will not be explained.

[0057] like Figure 5B As shown in FIG. 1 , a voltage stabilization circuit diagram provided in an embodiment of the present invention uses wireless charging to provide power to the multi-function switching circuit. The wireless charging circuit is designed using the DS_JDS9002, a three-in-one chip integrating wireless reception, lithium battery protection chip, and charging management. It has a maximum charging current of 450mA and a dedicated communication protocol. The voltage stabilization chip is designed using the XC6206P33 chip, which outputs a stable 3.3V and has a minimum leakage current of 7uA.

[0058] In the multifunctional switching circuit, the control of the EMS / RF control circuit 300 and the skin detection circuit 400 is very important, and the two cannot be turned on at the same time. The detailed switching control circuit diagram is shown in Figure 6, which will be described in detail below.

[0059] Figure 6The EMS / RF control circuit diagram provided in the embodiment of the present invention is composed of a transformer, a MOS tube driving circuit and a boost circuit. The controller 100 outputs waveforms of different frequencies through the EMS-PWM pin to drive the MOS tube to work. When the controller 100 sends a 1MHz carrier through the EMS-PWM pin, it drives the MOS tube to work, and the transformer outputs a high-voltage sine wave signal to generate a high-frequency signal. The high-frequency signal acts on the skin to produce a warming effect, thereby promoting the regeneration of collagen in the underlying skin. When the controller 100 sends a 33Hz carrier through the EMS-PWM pin, it drives the MOS tube to work, and the transformer outputs a low-frequency AC signal. When it acts on the skin, it will produce an electrical stimulation feeling, achieving the effect of skin tightening.

[0060] Specifically, such as Figure 6 As shown, the EMS / RF control circuit 300 includes an EMS / RF power supply circuit, a transformer L4, an N-MOS transistor Q15 and a transistor Q17. Figure 6 As can be seen, the EMS / RF power supply circuit includes transistor Q5, PMOS transistor U7, and boost module U6. The voltage regulator circuit provides voltage to the EMS / RF power supply circuit via the VBAT pin, which is connected to the PMOS transistor U7. The gate G of the PMOS transistor U7 is connected to the enable terminal DCDC-EN of the controller 100 via transistor Q5. The enable terminal DCDC-EN is connected to the base of the transistor Q5 via a current-limiting resistor R38. The gate G of the PMOS transistor U7 is connected to the collector of the transistor Q5, and the emitter of the transistor Q5 is grounded. The controller 100 controls the conduction and disconnection of the PMOS transistor U7 by controlling the transistor Q5. The PMOS transistor U7 serves as a protective device, protecting the boost module U6 from damage. The drain D of the PMOS tube U7 is connected to the boost module U6 through the current limiting resistor R47, and the current is limited to I = 0.3 / R47 = 0.3 / 0.2 = 1.5A. EC1 and C29 are filter capacitors. After passing through the boost module U6, the output voltage VOUT = 1.25(1+R35 / R44) = 13.75V. The VOUT is connected to the tap 8 of the transformer L4 to provide input voltage to the transformer.

[0061] The primary coil of transformer L4 includes taps 6, 8, and 10. The output terminal VOUT of boost module U6 is connected to tap 8, and tap 10 of transformer L4 is grounded. Tap 6 of transformer L4 is connected to N-MOS transistor Q15. The secondary coil of transformer L4 includes taps 3 and 6. Tap 3 is connected to a first contact point TB1, and tap 6 is connected to a second contact point P2 for contact with the human body.

[0062] The controller 100 is connected to the gate of an N-MOS transistor Q15 via an EMS-PWM pin, configured to output carrier signals of varying frequencies to the transformer L4 via 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 via a current-limiting resistor R31. The N-MOS transistor is an N-channel MOS transistor.

[0063] When the controller 100 transmits a 33Hz low-frequency signal through the EMS-PWM pin, the transformer L4 outputs a low-frequency AC signal. When applied to the skin, this produces a sensation of electrical stimulation, achieving a skin-tightening effect. When the controller 100 transmits a 1MHz carrier through the EMS-PWM pin, it drives the MOS transistor, causing the transformer to output a high-voltage sine wave signal, generating a high-frequency signal. This high-frequency signal creates a warming effect on the skin, promoting collagen regeneration in the underlying skin.

[0064] Furthermore, to further enhance the effectiveness of the controller 100 in transmitting carrier signals, an embodiment of the present invention adds an NPN transistor Q17 to the EMS / RF control circuit 300. The controller 100 is connected to the base of the transistor Q17 via the RF-PWM pin and to the collector of the transistor Q17 via the tap 10 of the transformer L4. The emitter of the transistor Q17 is grounded. The controller 100 can alternately transmit AC carrier signals to the transformer via the EMS-PWM and RF-PWM pins, thereby enhancing the transformer's operating efficiency. Furthermore, since the transformer generates reverse voltage during operation, which is very likely to cause breakdown of the MOS transistor, to further protect the MOS transistor, an embodiment of the present invention includes a diode D8 at the tap 10 of the transformer L4. The cathode of the diode D8 is connected to the tap 10 of the transformer L4, and the positive electrode is grounded. When the transformer generates a negative voltage, the diode D8 is turned on and the tap 10 of the transformer is grounded, thereby preventing the N-MOS transistor Q15 from being broken down due to the negative voltage, thereby protecting the N-MOS transistor Q15.

[0065] Furthermore, to more accurately control the transmit power of the EMS / RF control circuit 300 and dynamically adjust the transmit power based on the contact between the first contact point TB1 and the second contact point P2 and the skin, an embodiment of the present invention further provides a monitoring point S1 at the source of the N-MOS transistor Q15 as a first detection signal output terminal, which is connected 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 a first detection signal. When the controller 100 obtains a null first detection signal, it indicates that the second contact point P2 is not in contact with the skin; when the first detection signal is too large, it indicates that the second contact point P2 is in little contact with the skin, and the transmit power needs to be increased; when the first detection signal is too small, it indicates that the second contact point P2 is in much contact with the skin, and the transmit power needs to be reduced. Of course, the above control process can also be set in the opposite manner, and the specifics are not limited.

[0066] Therefore, it can be seen from the above that the EMS / RF control circuit 300 provided in the embodiment of the present invention realizes the sharing of EMS function and RF function by transmitting different frequency signals through the controller 100, thereby 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 breakdown, which plays a good protective role.

[0067] Figure 7A A circuit diagram of a skin detection circuit 400 according to an embodiment of the present invention is shown. This circuit is primarily used to measure human skin moisture, identifying skin conditions and adjusting the EMS / RF function or other third-party load functions accordingly. The circuit includes a voltage follower circuit, skin contact points, and an AD detection circuit.

[0068] The skin contact points are first contact point TB1 and second contact point P2. The skin detection circuit 400 is connected to the second contact point P2 via contact point 4, and to the first contact point TB1 via contact point 5. It contacts the skin via the first contact point TB1 and second contact point P2. Contact point 4 is the input of the AD detection circuit, and contact point 5 is the output of the voltage follower circuit.

[0069] The circuit structure of the voltage follower circuit is as follows: Figure 7AAs shown, the voltage follower circuit includes a current-limiting resistor R62 and a single op amp U9A. The square wave signal is input to the single op amp U9A through the current-limiting resistor R62. The output of the single op amp U9A is connected to the first contact point TB1. When the controller 100 outputs a carrier signal through the HZ pin, it passes through the voltage follower circuit and outputs a signal of the same waveform at the first contact point TB1, reaching the skin.

[0070] The AD detection circuit includes an isolation capacitor C24, a filter capacitor C26 and a diode D11. The second contact point P2 is connected to one end of 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 the filter circuit composed of resistors R63 and C26, and is connected to the FZ_AD pin of the controller 100, outputting the skin detection results to the controller 100.

[0071] The specific skin testing 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. The output signal is applied to the contacted skin. Due to the capacitive reactance characteristics of the skin, a sharp waveform is formed at the second contact point. After the waveform passes through the AD detection circuit, a stable FZ_AD signal is output. The simulation effect is as follows: Figure 7B As shown in FIG, the simulation waveform shows that the 4KHZ square wave signal finally outputs a DC signal after passing through the detection circuit and human skin. Different human body impedances result in different output voltages.

[0072] In the actual skin measurement process, since the electrical impedance characteristics of human tissue are much more complicated than those of general objects, the most obvious feature is that the value of the electrical impedance will change with the change of the measurement frequency. Because the liquid tissue in human cells does not simply show the characteristics of resistance, the interaction between the water in the cells and the cell membrane exists more as the characteristics of capacitance. In order to analyze more skin characteristics and obtain multi-frequency information, the embodiment of the present invention uses a square wave pulse signal as the excitation source, which is easy to implement in combination with a digital circuit and has a wider spectrum. As shown in 7C, it is a curve of moisture corresponding to the collected AD value, which shows the corresponding relationship between voltage value and moisture content. As shown in FIG. Figure 7D The following figure shows a water-oil comparison curve obtained through AD testing. By applying an algorithm based on this curve, we can measure the water-oil properties of human skin, thereby reflecting skin characteristics such as oiliness, dryness, and combination. By activating different levels of function based on different skin characteristics, we can achieve better skin improvement results.

[0073] Therefore, it can be seen from the above that the skin detection circuit 400 proposed in the embodiment 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. The AD detection circuit detects the signal generated by the human skin, accurately reflecting the condition of the human skin, so that the controller 100 can adjust the EMS / RF control circuit 300 or other third-party load circuit according to the detection results, and can implement skin care more accurately.

[0074] Furthermore, since in actual applications, the EMS / RF function and the skin detection function need to be separated and cannot be turned on at the same time, how to coordinate the use time between the two is a very important issue, and it is necessary to effectively prevent users from damaging their skin due to misoperation. Figure 6 and Figure 7A As shown, in order to coordinate the EMS / RF function and the skin detection function, the embodiment of the present invention provides a switch circuit 200. The switch circuit 200 is an electrically controlled double-pole double-throw switch, in which the middle point 3 of one switch is connected to the first contact point TB1, and the middle point 6 of the other switch is connected to the second contact point P2. One throw of the switch circuit 200 includes contact points 2 and 7; the other throw includes contact points 5 and 4. The controller 100 is connected to the switch controller 100YX-JDQ via pins KG1 and KG2. When KG1 = 0 and KG2 = 1, pins 2 and 3 of the double-pole double-throw switch are connected, and pin 7 and pin 6 are connected. The first contact point TB1 and the second contact point P2 contact the two sides of the human skin, turning on the EMS / RF control circuit 300 and disconnecting the skin detection circuit 400. When KG1 = 1 and KG2 = 0, pins 5 and 3 of the double-pole double-throw switch are connected, and pins 4 and 6 are connected. The first contact point TB1 and the second contact point P2 contact the human skin, turning on the skin detection circuit 400 and disconnecting the EMS / RF control circuit 300, enabling the skin detection function. Of course, the double-pole double-throw switch can be implemented as a relay or other electrical switch, and this is not limited here.

[0075] As can be seen from the above, the embodiment of the present invention conveniently realizes the scheduling of the EMS / RF control circuit 300 and the skin detection circuit 400 by setting the switch circuit 200, preventing the simultaneous activation due to user error operation, thereby preventing damage to the skin.

[0076] Furthermore, based on the above-mentioned EMS / RF control circuit 300, the embodiment of the present invention further proposes another circuit structure, such as Figure 6 and Figure 8 As shown, in Figure 6In the embodiment shown, the controller 100 obtains the first detection signal by setting the first detection signal output terminal, thereby obtaining the contact status between the second contact point P2 and the skin, and then adjusting the transmission power of the EMS / RF control circuit 300. The applicant found in further research that when using the EMS function, the controller 100 sends a carrier signal with a frequency of 33Hz, which has relatively low power. The electrical signal flowing through the second contact point P2 is often relatively weak, and the accurate first detection signal cannot be effectively obtained through the first detection signal output terminal. Based on this, the present application further adds a second loop detection circuit 600 on the basis of the above embodiment, such as Figure 8 shown.

[0077] exist Figure 8 In the embodiment, the second loop detection circuit 600 includes a PNP transistor Q18 and an NPN transistor Q19 to form a detection circuit, which detects the electrical signal flowing through the second contact point and outputs a second detection signal to improve the detection sensitivity of the second contact point P2. Figure 8 In the embodiment, 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 via a 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 via a current-limiting resistor R50 and a pull-up resistor R53. To prevent current backflow from breaking down the PNP transistor Q18, a diode D9 is further provided at the collector of the PNP transistor Q18 in this embodiment of the present invention. The cathode of the second diode D9 is connected to the collector of the PNP transistor Q18, and the positive electrode is grounded. When the controller 100 issues an enable signal via the DCDC EN port through the second loop detection circuit 600, the NPN transistor Q19 turns on. When no electrical signal passes through the second contact point P2, the PNP transistor Q18 is off. When current passes through the second contact point P2, even a weak signal, as long as the trigger condition of the emitter of the PNP transistor Q18 is met, the PNP transistor Q18 turns on, and the second detection signal output terminal outputs a second detection signal to the CHECK P1 port of the controller 100.

[0078] 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, a current signal is generated at the second contact point P2. The sensitivity of the current flowing through the second contact point P2 is adjusted through the second detection signal to improve the detection sensitivity and output the second detection signal, so that the controller 100 can more accurately know the contact status of the first contact point TB1 and the second contact point P2 with the skin.

[0079] As can be seen from the above, by providing the second loop detection circuit 600, the problem of inaccurate detection caused by too small current under the EMS function is solved, so that the controller 100 can more accurately grasp the contact status 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 and other third load circuits.

[0080] Furthermore, when the EMS / RF control circuit 300 function is turned off, the controller 100 needs to activate a third-party load function, such as the photon detection function, and also needs 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 when there is no contact with the skin, 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 shown in FIG. Figure 9 As shown, a first loop detection circuit 500 and a third loop detection circuit are shown, which are used to detect whether the contact point is in contact with the skin.

[0081] like Figure 9As 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 via a current-limiting resistor R39 for receiving control signals from 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 via 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 via 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 simultaneously controls the thyristor PCR606 to be turned on through the KG3 port, the PNP transistor Q13 and the NPN transistor Q16 in the first loop detection circuit 500 are turned on, providing a voltage signal for the first contact point TB1.

[0082] 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.

[0083] When controller 100 needs to activate the photon function, it outputs a control signal through the DR-PWM port. As shown in the figure above, the first contact point TB1 touches the face, and the third contact point P1 is the hand electrode pad (the hand holding end). DR-PWM controls the conduction and cutoff of NPN transistor Q16. Q13 is a PNP transistor. When DR-PWM is high, Q16 and Q13 are turned on simultaneously. R1 is a current-limiting resistor and a voltage divider. PCR606 is a unidirectional thyristor. When KG3 is high, the thyristor turns on, and voltage reaches the face. When the hand touches the P1 electrode, CHECK-S is approximately 1.65V. The system determines that both the hand and face are in contact with the skin and turns on the corresponding load. This activates the photon driver circuit 1100, preventing direct eye damage when the photon is on. Alternatively, it activates the vibration massage function, giving a sense of intelligence. Alternatively, it can activate Peltier kinetic energy. The first loop detection circuit 500 and the third loop detection circuit 700 are used to enable other functions, which has higher security and prevents false triggering.

[0084] exist Figure 10Figure 1 shows a photon drive circuit 1100, which includes NPN transistors Q8 and Q9, a red LED LED-R, and a yellow LED LED-Y. JP1 is a driver board. The driver board is connected to a 3.3V voltage. The base of transistor Q8 is connected to LED-R via resistor R19, driving the LED. The collector is connected to driver board JP1, and the emitter is grounded via resistor R23. The base of transistor Q9 is connected to LED-Y via resistor R20, driving the LED. The collector is connected to driver board JP1, and the emitter is grounded via resistor R20. Therefore, the embodiment of the present invention combines the first loop detection circuit 500, the third loop detection circuit 700 and the photon driving circuit 1100. Before starting the photon driving circuit 1100, the first loop detection circuit 500 and the third loop detection circuit 700 are first used to determine whether the first contact point TB1 and the third contact point P1 are in contact with human skin. Only when they are in contact with human skin is the photon driving circuit 1100 started, thereby avoiding harm to the human body.

[0085] Furthermore, the multifunctional switching circuit further includes a Peltier driving circuit 1000, such as Figure 10 and Figure 11 As shown, Figure 11 is a Peltier driving circuit 1000, Figure 10 The Peltier driving circuit 1000 is used to heat or cool the human skin, which helps to enlarge or shrink the pores of the skin and has a good effect of tightening the skin.

[0086] like Figure 11 As 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. These transistors Q1, Q2, Q10, and Q11 form a bridge drive circuit. The controller 100 controls the Peltier drive circuit 1000 via the PET+ and PET- ports. J12PIN is a cooling plate, which is a thermocouple. When current passes through the thermocouple, one junction dissipates heat while the other absorbs heat, achieving both heating and cooling effects.

[0087] PET+ and PET- are applied to both sides of the cooling plate, respectively, producing cooling and heating effects. PWM waveforms control PET+ and PET-, as well as the temperature sensors at both ends of the Peltier transistor, to achieve precise temperature control. The base of the NPN transistor Q3 is connected to the controller, and its collector 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 cooling plate. The drain of the N-channel MOS transistor Q10 is connected to the cooling plate, and its gate is connected to the controller. The base of the NPN transistor Q4 is connected to the controller, and its collector 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 cooling plate. The drain of the N-channel MOS transistor Q11 is connected to the cooling plate, and its gate 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 is grounded via a current detection resistor R13 .

[0088] When the controller 100 outputs a control signal to the NPN transistor Q3 via resistor R7 through output terminal PET-, and also outputs a control signal to the N-MOS transistor Q10 via output terminal PET-, Q3, Q2, and Q10 are turned on. PET- acts on one side of the cooling plate, thereby cooling one side of J12PIN, achieving a cooling effect. When the controller 100 outputs a control signal to the NPN transistor Q4 via resistor R9 through output terminal PET+, and also outputs a control signal to the N-MOS transistor Q11 via output terminal PET+, Q4, Q1, and Q11 are turned on. PET+ acts on the other side of the cooling plate, thereby heating J12PIN, achieving a heating effect. Alternatively, PET+ can be applied to the cooling side and PET- to the heating side, resulting in either cooling or heating effects on the cooling plate.

[0089] Furthermore, to more accurately regulate the temperature, an embodiment of the present invention provides a current sensing resistor R13 between the sources of Q11 and Q10. A temperature sensing point is provided between R13 and the source and connected to the CHECKWEN pin of the controller 100. The controller 100 can detect the Peltier drive current by detecting the voltage of CHECKWEN. When controlling the temperature, accurate temperature measurement can be achieved by adjusting the duty cycle of the PET+ / PET- PWM waveform in combination with the detected current.

[0090] At the same time, in order to further protect the Peltier circuit, the embodiment of the present invention also adds an NTC protection function, which stops heating when the temperature is too high. Figure 10 As shown, the embodiment of the present invention is 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.

[0091] like Figure 10 As shown, thermistors R17 and R18 are typically provided together with the Peltier circuit to measure the temperature of the Peltier circuit. One end of thermistor R17 is connected to the driver board JP1, and the other end is grounded via capacitor C6. A temperature output point is provided between R17 and C6 and connected to the NTC1 pin of the controller 100. One end of thermistor R18 is connected to the driver board JP1, and the other end is grounded via capacitor C5. A temperature output point is provided between R18 and C7 and connected to the NTC2 pin of the controller 100. NTC1 and NTC2 are provided on opposite sides of the refrigeration plate to collect the temperature of the refrigeration plate.

[0092] Therefore, in summary, the Peltier driver circuit 1000 proposed in this embodiment of the present invention, by combining the first loop detection circuit 500 and the third loop detection circuit 700, activates the Peltier circuit to heat or cool the skin only when the controller 100 detects contact between the first contact point TB1 and the third contact point P1 and the human body, thereby avoiding wasted work and saving power. Simultaneously, the temperature detection points are set, enabling precise temperature control of the Peltier driver circuit 1000. Furthermore, the provision of an NTC detection circuit prevents overheating of the Peltier circuit.

[0093] Further, such as Figure 12A and 12B As 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.

[0094] Specifically, the motor drive circuit 800 is as follows: Figure 12A As shown, it includes an NPN transistor Q6 and a motor DJ1. The base of the transistor Q6 is connected to the Motor pin of the controller 100 through a current limiting resistor R12, and the collector of the transistor Q6 is connected to the motor DJ1 to drive the motor to vibrate and stop. The buzzer 900 circuit is as shown in FIG. Figure 12BAs 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.

[0095] Therefore, in summary, the motor drive circuit 800 and the buzzer circuit proposed in the embodiment of the present invention are combined with the first detection circuit and the third loop detection circuit 700. Only when the controller 100 detects that the first contact point TB1 and the third contact point P1 are in contact with the human body, the drive circuit and the buzzer 900 are started to massage the skin, thereby avoiding useless work and saving power.

[0096] Furthermore, an embodiment of the present invention also provides a massager, which adopts one or more multifunctional switching circuits mentioned in the above embodiments. The specific multifunctional switching circuit is consistent with the above description and will not be repeated here.

[0097] It should be noted that, unless otherwise specified, technical terms or scientific terms used in the embodiments of the present invention should have the common meanings understood by those skilled in the art to which the embodiments of the present invention belong.

[0098] In the description of the embodiments of the present invention, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention.

[0099] In addition, the technical terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly indicate the number of the technical features indicated. In the description of the embodiments of the present invention, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0100] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0101] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0102] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A multifunctional switching circuit, characterized in that: include: A controller, a switching circuit, an EMS / RF control circuit, a skin detection circuit, a first contact point, a second contact point, a first loop detection circuit, a third contact point, a third loop detection circuit, and a third load circuit; 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 and the skin detection circuit respectively under the control of the controller; When the controller controls the switch circuit to be disconnected, the controller starts the first loop detection circuit, obtains a third detection signal, and controls the third load circuit according to the third detection signal; One end of the first contact point is connected to the switch circuit, and the other end is used to contact the human body; One end of the second contact point is connected to the switch circuit, and the other end is used to contact the human body; The EMS / RF control circuit is electrically connected to the controller and sends an EMS signal or an RF signal under the control of the controller; the EMS / RF control circuit is also used to send a first detection signal flowing through the second contact point to the controller (100); When the controller controls the switch circuit to electrically connect the first contact point and the second contact point to the EMS / RF control circuit, the controller receives the first detection signal and adjusts the EMS / RF control circuit according to the first detection signal; When the controller controls the switch circuit to electrically connect the first contact point and the second contact point to the skin detection circuit, the controller controls the skin detection circuit.

2. The multifunctional switching circuit according to claim 1, wherein: The switch circuit includes a double-throw switch, wherein one end of one path of the double-throw switch is connected to the first contact point; and another end of the double-throw switch is electrically connected to the second contact point.

3. The multifunctional switching circuit according to claim 1, wherein: further comprising a second loop detection circuit; The second loop detection circuit includes a PNP transistor Q18 and an NPN transistor Q19; The emitter of the PNP transistor Q18 is connected to the second contact point, the base of the PNP transistor Q18 is electrically connected to the collector of the NPN transistor Q19, and the collector of the PNP transistor Q18 is connected to the controller for outputting a second detection signal to the controller; The base of the NPN transistor Q19 is electrically connected to the enable terminal of the controller; The controller sends an enable signal to the NPN transistor Q19. When an electrical signal passes through the second contact point, the PNP transistor Q18 is triggered to send a second detection signal to the controller.

4. The multifunctional switching circuit according to claim 1, wherein: The EMS / RF control circuit includes an N-channel MOS transistor Q15; The base 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 electrical signal flowing through the second contact point and outputting a first detection signal to the controller; The controller controls the signal power sent to the base of the N-channel MOS transistor Q15 according to the first detection signal.

5. The multifunctional switching circuit according to claim 4, wherein: 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 cathode of the diode D8.

6. The multifunctional switching circuit according to claim 5, wherein: The EMS / RF control circuit includes an NPN transistor Q17; The collector of the NPN transistor Q17 is connected to the tap 10 of the transformer L4, and the base of the NPN transistor Q17 is electrically connected to the controller; The controller is used to send control signals to the base of the N-channel MOS transistor Q15 and the base of the NPN transistor Q17 respectively.

7. The multifunctional switching circuit according to claim 1, wherein: 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 and off of the PMOS transistor U7; The drain of the PMOS tube U7 is electrically connected to the boost module U6.

8. The multifunctional switching circuit according to claim 1, wherein: The skin detection circuit comprises: Voltage follower circuit and AD detection circuit; One end of the voltage follower circuit is electrically connected to the controller, and the other end is electrically connected to the switch circuit, and is electrically connected to the first contact point through the switch circuit; One end of the AD detection circuit is electrically connected to the controller, and the other end is electrically connected to the switch circuit, and is electrically connected to the second contact point through the switch circuit.

9. The multifunctional switching circuit according to claim 8, wherein: The voltage follower circuit includes a current limiting resistor R62 and a single operational amplifier U9A; One end of the current limiting resistor is electrically connected to the controller, and the other end is connected to the single operational amplifier U9A, and is used to follow the signal waveform input by the controller.

10. A massager, characterized in that: The invention comprises a multifunctional switching circuit as described in any one of claims 1 to 9.

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