Cosmetic instrument and control circuit thereof

Abstract

The utility model relates to the field of beauty instruments, and provides a beauty instrument and a control circuit thereof. According to the control circuit of the beauty instrument, a contact electrode is connected with a heating unit to form a load node, a control unit is used for outputting a power supply instruction to a voltage conversion unit, the voltage conversion unit is controlled to carry out voltage conversion on electric energy provided by a power supply, and then target electric energy is output to a micro-current output unit. The micro-current output unit outputs the working electricity to the load node based on the target electric energy, so that the contact electrode and the power generation unit can work together according to the working electricity transmitted by the load node. Under the condition that a driving circuit, an interface or other wires do not need to be additionally arranged for the heating unit, heat output by the heating unit can be communicated with micro-current through the contact electrode to jointly act on the skin, and the control circuit of the beauty instrument is lower in implementation cost and simpler in wiring structure.

Description

Technical Field

[0001] The present application belongs to the field of beauty instruments, and in particular, relates to a beauty instrument and a control circuit of the beauty instrument. Background Art

[0002] At present, most beauty devices on the market are equipped with contact electrodes that are in contact with the skin, which are used to output microcurrent to act on the skin. In order to improve the effect of beauty devices on the skin, or to enrich the functions of beauty devices, a heating unit can be installed on the beauty device and used in combination with the contact electrodes to act on the skin together.

[0003] However, if a heating unit is installed on a beauty instrument that already has contact electrodes, it is necessary to configure a corresponding driving circuit, configuration interface, and circuit routing for the heating unit, which not only leads to excessively high implementation costs, but also increases the complexity of the internal routing of the beauty instrument. Utility Model Content

[0004] The purpose of the present application is to provide a control circuit of a beauty instrument and a beauty instrument, aiming to solve the problem that the cost of the above beauty instruments is too high due to the addition of functional units, and the complexity of the internal wiring of the beauty instruments increases.

[0005] A first aspect of an embodiment of the present application provides a control circuit of a beauty instrument, connected to a power supply, the control circuit comprising:

[0006] A contact electrode is used to contact the skin and output a microcurrent to the skin according to the working electricity;

[0007] The heating unit is connected to the contact electrode to form a load node; the heating unit is used to work according to the working electricity and output heat to the contact electrode;

[0008] A voltage conversion unit, used to convert the voltage of the electric energy provided by the power supply according to the power supply instruction and output the target electric energy;

[0009] A control unit, connected to the voltage conversion unit, and configured to output a power supply instruction to the voltage conversion unit;

[0010] The micro-current output unit is connected to the voltage conversion unit and the control unit respectively, and is used to output working electricity to the load node based on the target electric energy.

[0011] A second aspect of an embodiment of the present application provides a beauty instrument, which is used to carry the control circuit of the beauty instrument provided by the first aspect.

[0012] The beauty instrument includes:

[0013] The host is configured with a power supply terminal; the host is at least used to set a voltage conversion unit, a control unit and a micro-current output unit;

[0014] The beauty accessory is detachably connected to the host, and is provided with a connection terminal, the connection terminal is connected to the load node, and the beauty accessory is at least used to set the contact electrode and the heating unit;

[0015] When the beauty accessory is installed on the host, the power supply terminal cooperates with the connection terminal to form a conductive path.

[0016] Compared with the prior art, the embodiment of the utility model has the following beneficial effects: the control circuit of the beauty instrument is connected to the power supply, and the control circuit includes: a contact electrode, a heating unit, a voltage conversion unit, a control unit and a microcurrent output unit. The contact electrode is connected to the heating unit to form a load node. The control unit is connected to the voltage conversion unit to output a power supply instruction to the voltage conversion unit. The voltage conversion unit can convert the electric energy provided by the power supply into voltage according to the power supply instruction, and output the target electric energy to the microcurrent output unit. The microcurrent output unit outputs the working electricity to the load node based on the target electric energy, so that the contact electrode and the power generation unit can work together according to the working electricity transmitted by the load node. At this time, the heating unit outputs heat to the contact electrode, and the contact electrode can also transfer heat to the skin while contacting the skin and outputting microcurrent to the skin. The above scheme forms a load node by connecting the contact electrode to the heating unit, and uses the control unit to output a power supply instruction to the voltage conversion unit, and controls the voltage conversion unit to convert the electric energy provided by the power supply into voltage, and then outputs the target electric energy to the microcurrent output unit. The microcurrent output unit is used to output working electricity to the load node based on the target electric energy, so that the contact electrode and the power generation unit can work together according to the working electricity transmitted by the load node. Without the need to configure a driving circuit, interface or other wiring for the heating unit, the heat output by the heating unit can also be connected to the microcurrent through the contact electrode to act on the skin together, providing a control circuit of a beauty instrument with lower cost and simpler wiring structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a control circuit of a beauty instrument provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the structure of a control circuit of a beauty instrument provided in another embodiment of the present application;

[0019] Figure 3 A schematic diagram of the structure of a control circuit of a beauty instrument provided in yet another embodiment of the present application;

[0020] Figure 4 The specific structure of the heating unit in the control circuit of the beauty instrument provided in the embodiment of the present application is shown in FIG. Figure 1 ;

[0021] Figure 5 The specific structure of the heating unit in the control circuit of the beauty instrument provided in the embodiment of the present application is shown in FIG. Figure 2 ;

[0022] Figure 6 A schematic diagram of the specific structure of a micro-current output unit in the control circuit of a beauty instrument provided in an embodiment of the present application;

[0023] Figure 7 A schematic diagram of the structure of a beauty instrument provided in an embodiment of the present application;

[0024] Figure 8 A schematic diagram of the structure of a beauty instrument provided in another embodiment of the present application;

[0025] Fig. 9 This is a schematic diagram of the structure of a beauty instrument provided in yet another embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] At present, most beauty devices on the market are equipped with contact electrodes that are in contact with the skin, which are used to output microcurrent to act on the skin. In order to improve the effect of beauty devices on the skin, or to enrich the functions of beauty devices, a heating unit can be installed on the beauty device and used in combination with the contact electrodes to act on the skin together.

[0031] However, if a heating unit is installed on a beauty instrument that already has contact electrodes, it is necessary to configure a corresponding driving circuit, configuration interface, and circuit routing for the heating unit, which not only leads to excessively high implementation costs, but also increases the complexity of the internal routing of the beauty instrument.

[0032] In order to solve the above technical problems, an embodiment of the present application provides a control circuit of a beauty instrument, which is connected to a power supply, and the control circuit includes: a contact electrode, a heating unit, a voltage conversion unit, a control unit and a microcurrent output unit. The contact electrode is connected to the heating unit to form a load node. The control unit is connected to the voltage conversion unit, and is used to output a power supply instruction to the voltage conversion unit. The voltage conversion unit can convert the voltage of the electric energy provided by the power supply according to the power supply instruction, and output the target electric energy to the microcurrent output unit. The microcurrent output unit outputs working electricity to the load node based on the target electric energy, so that the contact electrode and the power generation unit can work together according to the working electricity transmitted by the load node. At this time, the heating unit outputs heat to the contact electrode, and the contact electrode can transfer heat to the skin while contacting the skin and outputting microcurrent to the skin.

[0033] The above scheme forms a load node by connecting the contact electrode to the heating unit, and uses the control unit to output a power supply instruction to the voltage conversion unit, which controls the voltage conversion unit to convert the electric energy provided by the power supply into voltage, and then outputs the target electric energy to the microcurrent output unit. The microcurrent output unit outputs working electricity to the load node based on the target electric energy, so that the contact electrode and the power generation unit can work together according to the working electricity transmitted by the load node. Without the need to configure a driving circuit, interface or other wiring for the heating unit, the heat output by the heating unit can also be connected to the microcurrent through the contact electrode to act on the skin together, providing a control circuit for a beauty instrument with lower implementation cost and simpler wiring structure.

[0034] See also Figure 1 , Figure 1 The structure diagram of the control circuit of the beauty instrument provided in the embodiment of the present application is shown. For the convenience of explanation, only the part related to the present embodiment is shown, which is described in detail as follows:

[0035] exist Figure 1In the embodiment, the control circuit 100 of the beauty instrument is connected to the power supply. The control circuit 100 of the beauty instrument includes: a contact electrode 10, a heating unit 20, a voltage conversion unit 30, a control unit 40 and a micro-current output unit 50. Specifically:

[0036] The contact electrode 10 is used to contact the skin and output microcurrent to the skin according to the working power. The heating unit 20 is connected to the contact electrode 10 to form a load node P21. The heating unit 20 is used to work according to the working power and output heat to the contact electrode 10. The voltage conversion unit 30 is used to convert the electric energy provided by the power supply 110 into voltage according to the power supply instruction and output the target electric energy. The control unit 40 is connected to the voltage conversion unit 30 and is used to output the power supply instruction to the voltage conversion unit 30. The microcurrent output unit 50 is connected to the voltage conversion unit 30 and the control unit 40 respectively, and is used to output the working power to the load node P21 based on the target electric energy. It can be understood that the target electric energy can be direct current electric energy or alternating current electric energy, and the circuit is configured to output direct current electric energy or alternating current electric energy according to the actual application. The present application is explained by taking the target electric energy as direct current as an example, hereinafter referred to as target direct current.

[0037] In this embodiment, the control circuit 100 of the beauty instrument is connected to the power supply 110 through the voltage conversion unit 30, and the control unit 40 is used to control the voltage conversion unit 30 to convert the electric energy provided by the power supply 110 into voltage, and then output multiple direct currents with different voltages to meet the power requirements of each unit in the control circuit 100.

[0038] In a specific implementation, the power supply 110 can be a battery or a power adapter connected to the beauty instrument. Here, when the power supply 110 is a battery, it can directly output direct current to the voltage conversion unit 30. When the power supply 110 is an adapter, when the adapter is connected to alternating current, the voltage conversion circuit in the adapter can convert the alternating current into direct current, and then output electrical energy to the voltage conversion unit 30. The control unit 40 can output a power supply instruction to the voltage conversion unit 30, thereby controlling the voltage conversion unit 30 to perform voltage conversion according to the electrical energy provided by the power supply 110 and output the target direct current.

[0039] Exemplarily, the voltage conversion unit 30 may be implemented using a DC voltage conversion chip. It is understandable that, in order to meet the power demand of each unit in the control circuit 100 of the beauty instrument, when the voltage conversion chip is used to convert the DC power, the voltage conversion chip takes the power provided by the power supply 110 as input, and after converting the DC power, outputs multiple target DC power with different voltages.

[0040] In this embodiment, since the microcurrent acting on the skin is specifically a microcurrent with a DC bias, when the voltage conversion unit 30 is used to convert the electric energy provided by the power supply 110 according to the power supply instruction and output the target DC power, the target DC power cannot directly act on the skin through the contact electrode 10, so the microcurrent output unit 50 is used to output the microcurrent based on the target DC power, that is, the working power. The working power is then applied to the contact electrode 10 through the load node P21, so that the contact electrode 10 can output an appropriate microcurrent to the skin. Here, the target DC power generally refers to the DC bias voltage output by the voltage conversion unit 30 to the microcurrent output unit 50. In a specific implementation, the voltage conversion unit 30 can output DC bias voltages with different voltage values, and accordingly, the microcurrent output unit 50 can output working power with different voltage amplitude ranges based on DC bias voltages with different voltage values. Since the contact electrode 10 is connected to the heating unit 20 to form a load node P21, when the working electricity is applied to the contact electrode 10 through the load node P21, the heating unit 20 can output heat to the contact electrode 10 under the action of the working electricity, so that the contact electrode 10 can act or transfer heat to the skin while outputting microcurrent to the skin, which can improve the skin care efficiency of the beauty instrument to a certain extent. For example, when using a beauty instrument to promote the skin to absorb essence, while applying microcurrent to the skin through the contact electrode 10, outputting a certain amount of heat can improve the efficiency of the skin to absorb essence.

[0041] In a specific implementation, the contact electrode 10 may include a plurality of electrode sheets, wherein the plurality of electrode sheets may form a regular electrode matrix. Here, when the contact electrode 10 contacts the skin, a closed loop of microcurrent may be formed due to the contact between the human body and the beauty instrument. When the contact electrode 10 contacts the skin, the microcurrent may continue to act on the skin based on the closed loop.

[0042] It can be understood that the micro-current output unit 50 outputs working power to the load node P21 based on the target direct current, and the working power can be regarded as direct current.

[0043] In a specific implementation, the microcurrent output unit 50 may be a microcurrent source, which takes the target direct current as input, outputs periodic high and low level microcurrents as working power, and acts on the contact electrode 10 and the heating unit 20 through the load node P21.

[0044] Exemplarily, the heating unit 20 may be a unit composed of components that generate heat using direct current. For example, the heating unit 20 may be implemented using electric heating devices such as a heating film and a PTC heating sheet. Here, since the heating unit 20 only needs to output heat to the contact electrode 10, and the heat is applied to the skin through the contact electrode 10, in a specific implementation, the heating unit 20 may be connected in series between the load node P21 and the ground to form another closed loop of working electricity.

[0045] See also Figure 2 , Figure 2 FIG. 2 shows a schematic diagram of a control circuit of a beauty instrument provided by another embodiment of the present application. Figure 2 As shown, as an embodiment, the control circuit 100 of the beauty instrument further includes:

[0046] The switch unit 60 is coupled between the micro-current output unit 50 and the load node P21. The switch unit 60 is used to connect the path between the micro-current output unit 50 and the load node P21 according to the first switch control signal, and disconnect the path between the micro-current output unit 50 and the load node P21 according to the second switch control signal.

[0047] The control unit 40 is connected to the switch unit 60 , and the control unit 40 is further configured to output a first switch control signal to the switch unit 60 according to an enable instruction, and output a second switch control signal to the switch unit 60 according to a disable instruction.

[0048] In this embodiment, since the switch unit 60 is coupled between the microcurrent output unit 50 and the load node P21, the control unit 40 can be used to control the switch unit 60 to be turned on and off, thereby realizing the on-off control of the path between the microcurrent output unit 50 and the load node P21. That is, when the switch unit 60 turns on the path between the microcurrent output unit 50 and the load node P21 according to the first switch control signal, the working electricity output by the microcurrent output unit 50 can act on the load node P21, and at this time, the heating unit 20 can output heat to the contact electrode 10, and the contact electrode 10 can output a microcurrent based on the working electricity. When the switch unit 60 disconnects the path between the microcurrent output unit 50 and the load node P21 according to the second switch control signal, the working electricity output by the microcurrent output unit 50 cannot act on the load node P21, and at this time, the heating unit 20 and the contact electrode 10 stop working.

[0049] In a specific implementation, the switch unit 60 can be implemented by an electrically controlled switch circuit composed of at least one of a switch tube, an electronic switch and an optical coupler. At a moment, the control unit 40 can output a first switch control signal to the switch unit 60 according to an enable instruction, or output a second switch control signal to the switch unit 60 according to a disable instruction. Here, the first switch control signal and the second switch control signal are control signals output by the control unit 40 to the switch unit 60. For example, the user can trigger an enable instruction to instruct the control unit 40 to output the first switch control signal to the switch unit 60. Among them, the enable instruction can specifically be a power-on instruction of the beauty instrument, or a beauty function switching instruction of the beauty instrument, which is not limited here. Accordingly, the control unit 40 can be instructed to output a second switch control signal to the switch unit 60 by triggering a disable instruction. Among them, the disable instruction can be a shutdown instruction automatically triggered by the beauty instrument in the standby state, or a shutdown instruction manually triggered by the user, or a standby instruction of the beauty instrument, which is not limited here.

[0050] See also Figure 3 , Figure 3 FIG. 2 shows a schematic diagram of a control circuit of a beauty instrument provided in another embodiment of the present application. Figure 3 As shown, as an embodiment, the control circuit 100 of the beauty instrument further includes:

[0051] The handle electrode 70 exposed on the surface of the beauty instrument is connected to the micro-current output unit 50, and is used to form a conductive loop with the human body when the contact electrode 10 outputs micro-current to the skin according to the working electricity.

[0052] In this embodiment, the handle electrode 70 is exposed and arranged on the surface of the beauty instrument. When the user holds the beauty instrument, the contact electrode 10, the human body and the handle electrode 70 form a conductive path. The working electricity output by the microcurrent output unit 50 acts on the contact electrode 10 via the switch unit 60 and the load node P21, and then flows back to the microcurrent output unit 50 through the human body and the handle electrode 70.

[0053] In a specific implementation, the handle electrode 70 can be implemented by using an existing metal electrode, and connected to the ground terminal of the micro-current output unit 50 through an internal wiring.

[0054] As an example, the heating unit 20 can be coupled between the load node P21 and the ground terminal of the switch unit 60. That is, when the working power output by the micro-current output unit 50 acts on the heating unit 20 via the switch unit 60 and the load node P21, a current loop can be formed through the internal wiring.

[0055] As another example, the heating unit 20 can also be coupled between the load node P21 and the ground terminal of the micro-current output unit 50. That is, when the working power output by the micro-current output unit 50 acts on the heating unit 20 via the switch unit 60 and the load node P21, a current loop can be formed through the internal wiring.

[0056] See also Figure 4 , Figure 4 The specific structure of the heating unit in the control circuit of the beauty instrument provided in the embodiment of the present application is shown. Figure 1 .like Figure 4 As shown, as an embodiment, the heating unit 20 includes:

[0057] The heating film 21 is attached to the inner side of the contact electrode 10 , and is used to output heat to the contact electrode 10 according to working electricity.

[0058] In this embodiment, the heating film 21 is attached to the inner side of the contact electrode 10, and the heating film 21 and the contact electrode 10 both input working power through the load node P21. In specific implementation, the heating film 21 and the contact electrode 10 can be connected in parallel, or through different branches to form different current loops.

[0059] For example, one end of the heating film 21 is used to connect to the load node P21, and the other end is used to connect to the switch unit 60 to form a current loop, or to connect to the microcurrent output unit 50 to form a current loop. The contact electrode 10 can form a current loop through the human body and the surface electrode of the beauty instrument.

[0060] See also Figure 5 , Figure 5 The specific structure of the heating unit in the control circuit of the beauty instrument provided in the embodiment of the present application is shown. Figure 2 .like Figure 5 As shown, as an embodiment, the heating unit 20 further includes:

[0061] The thermostatic switch 22 is connected in series with the heating film 21. The thermostatic switch 22 is used to detect the temperature of the heating film 21, and when the temperature is equal to or greater than the temperature threshold, the passage between the heating film 21 and the load node P21 is disconnected, and when the temperature is less than the temperature threshold, the passage between the heating film 21 and the load node P21 is opened.

[0062] The load resistor 23 is connected in parallel with the thermostatic switch 22. The load resistor 23 is used to form a series branch with the heating film 21 when the thermostatic switch 22 is turned off.

[0063] In this embodiment, the thermostatic switch 22 can be connected in series between the load node P21 and the heating film 21. Specifically, the first end of the thermostatic switch 22 is connected to the load node P21, and the second end of the thermostatic switch 22 is connected to the heating film 21 to form a node P22. One end of the load resistor 23 is connected to the load node P21, and the other end is connected to the node P22, and then connected in parallel with the thermostatic switch 22. When the thermostatic switch 22 is disconnected, the load resistor 23 and the heating film 21 form a series branch.

[0064] In this embodiment, the thermostatic switch 22 is used to control the on / off of the conductive path between the heating film 21 and the load node P21 according to the temperature of the heating film 21 .

[0065] For example, assuming that the temperature threshold is 44 degrees Celsius or 45 degrees Celsius, when the thermostatic switch 22 detects that the temperature of the heating film 21 is 46 degrees Celsius, the heating film 21 can be powered off by disconnecting the path between the heating film 21 and the load node P21. Accordingly, when the thermostatic switch 22 detects that the temperature of the heating film 21 is less than 44 degrees Celsius or 45 degrees Celsius, the path between the heating film 21 and the load node P21 is turned on again, so that the heating film 21 can work according to the working power and output heat to the contact electrode 10.

[0066] It should be noted that the heating film 21 and the thermostatic switch 22 are connected in series to form a series branch, and the load resistor 23 is connected in parallel with the heating film 21. When the thermostatic switch 22 is turned on, the load resistor 23 forms a series branch with the heating film 21, so that the load resistor 23 is short-circuited. When the thermostatic switch 22 is turned off, the load resistor 23 forms a series branch with the heating film 21.

[0067] For example, when the thermostatic switch 22 is turned on, since the resistance of the load resistor 23 is relatively large, the load resistor 23 is equivalent to a short circuit, and the current flows to the heating film 21 through the thermostatic switch 22. When the thermostatic switch 22 is turned off, the working electricity acting on the load node P21 flows through the load resistor 23 and the heating film 21, and finally flows to the ground end to form a loop. At this time, since the resistance of the load resistor 23 is relatively large, the current flowing through the heating film 21 is relatively small, and the heating film 21 cannot output heat normally due to the small current.

[0068] See also Figure 6 , Figure 6 The specific structural diagram of the micro-current output unit in the control circuit of the beauty instrument provided in the embodiment of the present application is shown. Figure 6 As shown, as an embodiment, the micro-current output unit 50 includes:

[0069] The bias voltage output unit 51 is connected to the voltage conversion unit 30, and is used to output the bias voltage according to the target DC power; the operational amplifier unit 52 includes a positive input terminal 521 and a negative input terminal 522, the positive input terminal 521 is connected to the bias voltage output unit 51, and the negative input terminal 522 is connected to the control unit 40; the control unit 40 is also used to output a PWM signal to the operational amplifier unit 52; the operational amplifier unit 52 is used to output working power to the load node P21 according to the PWM signal and the bias voltage.

[0070] In this embodiment, since the waveform of the PWM signal is related to its duty cycle, the degree to which the operational amplifier unit 52 raises the voltage amplitude range of the PWM signal according to the bias voltage is related to the voltage value of the bias voltage, so the control unit 40 can be used to output PWM signals with multiple duty cycles. In addition, the bias voltage output unit 51 is used to output bias voltages with multiple voltage values ​​to adjust the frequency and / or voltage amplitude of the working power, providing a basis for providing multiple types of working power to the load node P21.

[0071] In a specific implementation, the bias voltage output unit 51 may be a voltage source circuit or a DC voltage conversion circuit, etc. For example, the bias voltage output unit 51 may specifically include a plurality of voltage source circuits, and may output a corresponding DC bias voltage by selecting different voltage source circuits to work. For another example, the bias voltage output unit 51 may specifically include a DC voltage conversion circuit, and the DC voltage conversion circuit may perform voltage conversion according to a preset power supply, that is, may perform multiple levels of conversion on the preset power supply, and then output bias voltages of multiple voltage values.

[0072] It should be noted that the PWM signal output by the control unit 40 to the negative input terminal 522 of the operational amplifier unit 52 can be regarded as a sinusoidal electrical signal, that is, the PWM signal has a high-level part and a low-level part. The bias voltage output unit 51 is used to output a corresponding bias voltage to the positive input terminal 521 of the operational amplifier unit 52. Under the action of the DC bias voltage, the operational amplifier unit 52 can raise the voltage amplitude range of the PWM signal to a corresponding degree, that is, raise the voltage values ​​of the high and low levels of the PWM signal. In a specific implementation, the operational amplifier unit 52 can be an operational amplifier circuit built based on an operational amplifier, and the positive input terminal of the operational amplifier circuit is used to access the DC bias voltage, the negative input terminal is used to access the PWM signal, and the output terminal is coupled to the contact electrode 10.

[0073] As an example, assume that the voltage value of the high level part of the PWM signal is 3.3V, and the voltage value of the low level part is 0V. By inputting the PWM signal to the negative input terminal 522 of the operational amplifier unit 52 and inputting a DC bias voltage to the positive input terminal 521 of the operational amplifier unit 52, the voltage amplitude range of the PWM signal can be raised. For example, the high level and low level of the PWM signal are raised by 2V, that is, the amplitude range of the micro-current output by the operational amplifier unit 52 can be 2V to 5.3V. Here, the high level voltage of the working electricity is 5.3V, the low level voltage is 2V, and the voltage difference between the high and low levels of the working electricity is 5.3V-2V=3.3V, and the voltage difference between the high and low levels of the PWM signal is 3.3V-0V=3.3V, and the high and low voltage differences of the two are both 3.3V. Based on this, by raising the voltage values ​​of the high and low levels of the PWM signal, the waveform of the output working power is made similar to the waveform of the PWM signal. By adjusting the waveform of the PWM signal and / or adjusting the bias voltage, the working power output by the operational amplifier unit 52 can be adjusted accordingly.

[0074] As an embodiment, the micro-current output unit 50 further includes: a current enhancement unit connected between the operational amplifier unit 52 and the load node P21, and used to amplify the current of the working power.

[0075] In specific implementation, the current enhancement unit can be implemented by using a preset power supply and a switch tube to form an emitter follower circuit. For example, the negative terminal of the preset power supply is grounded, the positive terminal is connected to the high potential end of the switch tube, the controlled end of the switch tube is connected to the output end of the operational amplifier unit 52, and the low potential end of the switch tube is used to couple with the contact electrode 10. Here, the switch tube can be a triode, a MOS tube, or an IGBT tube, etc., which is not limited here.

[0076] The preset power supply and the switching tube form an emitter follower circuit. The low potential end of the switching tube can follow the working power output by the operational amplifier unit 52, that is, the low potential end of the switching tube can output a waveform signal corresponding to the working power, and can also amplify the current for the working power. By coupling with the contact electrode 10, the amplified working power can be transmitted to the contact electrode 10, which can improve the load-carrying capacity of the control circuit 100 of the beauty instrument for the contact electrode 10.

[0077] The above scheme forms a load node by connecting the contact electrode to the heating unit, and uses the control unit to output a power supply instruction to the voltage conversion unit, which controls the voltage conversion unit to convert the electric energy provided by the power supply into voltage, and then outputs the target direct current to the microcurrent output unit. The microcurrent output unit outputs working electricity to the load node based on the target direct current, so that the contact electrode and the power generation unit can work together according to the working electricity transmitted by the load node. Without the need to configure a driving circuit, interface or other wiring for the heating unit, the heat output by the heating unit can also be connected to the microcurrent through the contact electrode to act on the skin together, providing a control circuit for a beauty instrument with lower implementation cost and simpler wiring structure.

[0078] Figure 7 The structure diagram of the beauty instrument provided in the embodiment of the present application is shown. Figure 7 As shown, the beauty instrument 200 provided in this embodiment is used to carry the control circuit 100 of the beauty instrument provided in the above embodiment. Figure 7 In the embodiment, the beauty instrument 200 includes a main unit 101 and beauty accessories 102. Specifically:

[0079] The host 101 is configured with a power supply terminal 1011. The host 101 is at least used to set a voltage conversion unit 30, a control unit 40 and a microcurrent output unit 50. The beauty accessory 102 detachably connected to the host 101 is configured with a connection terminal 1021, and the connection terminal 1021 is connected to the load node P21. The beauty accessory 102 is at least used to set a contact electrode 10 and a heating unit 20. When the beauty accessory 102 is installed on the host 101, the power supply terminal 1011 cooperates with the connection terminal 1021 to form a conductive path.

[0080] In this embodiment, the host 101 and the beauty accessory 102 are detachably connected. By configuring the power supply terminal 1011 on the host 101 and configuring the connection terminal 1021 on the beauty accessory 102, when the beauty accessory 102 is mounted on the host 101, the power supply terminal 1011 and the connection terminal 1021 cooperate to form a conductive path. Based on this, the working electricity output by the current output unit 50 can be output to the load node P21 in the beauty accessory 102 through the conductive path formed by the power supply terminal 1011 and the connection terminal 1021 when the beauty accessory 102 is mounted on the host 101. That is, the contact electrode 10 and the heating unit 20 can work according to the working electricity.

[0081] In a specific implementation, the power supply terminal 1011 can be exposed on the surface of the host 101, and the connection terminal 1021 can be embedded in the groove of the beauty accessory 102. For example, the host 101 can be provided with a raised second connection part, that is, a male connector, in the structure, and the power supply terminal 1011 is exposed in the connection part. Correspondingly, the beauty accessory 102 can be provided with a second connection part with a groove, that is, a female connector, and the connection terminal 1021 is embedded in the groove of the second connection part. Then, when the beauty accessory 102 is installed on the host 101, the first connection part and the second connection part are engaged, and at the same time, the power supply terminal 1011 and the connection terminal 1021 are in contact with each other, and cooperate to form a conductive path.

[0082] Figure 8 FIG. 2 shows a schematic diagram of the structure of a beauty instrument provided by another embodiment of the present application. Figure 8 As shown, as an embodiment, the beauty instrument 200 further includes:

[0083] The switch unit 60 is configured on the host 101 and coupled between the micro-current output unit 50 and the power supply terminal 1011. The switch unit 60 is used to connect the path between the micro-current output unit 50 and the power supply terminal 1011 according to the first switch control signal, and disconnect the path between the micro-current output unit 50 and the power supply terminal 1011 according to the second switch control signal.

[0084] The control unit 40 is connected to the switch unit 60 , and the control unit 40 is further configured to output a first switch control signal to the switch unit according to an enable instruction, and output a second switch control signal to the switch unit 60 according to a disable instruction.

[0085] It is easy to understand that the switch unit 60 in this embodiment is coupled to the micro-current output unit 50 and the power supply terminal 1011, and is controlled by the control unit 40. Since the specific working principle and implementation method of the switch unit 60 have been received in the embodiment of the above control circuit 100, they are not repeated here.

[0086] Fig. 9 FIG. 2 shows a schematic diagram of the structure of a beauty instrument provided by another embodiment of the present application. Fig. 9 As shown, as an embodiment, the beauty instrument 200 further includes:

[0087] The handle electrode 70 exposed on the surface of the main unit is connected to the micro-current output unit 50, and is used to form a conductive loop with the human body when the contact electrode 10 outputs micro-current to the skin according to the working electricity.

[0088] The voltage detection unit 80 is configured on the host and connected between the control unit 40 and the power supply terminal 1011. It is used to detect the voltage of the power supply terminal 1011, and when the voltage is less than the voltage threshold, send an enable instruction to the control unit 40, and when the voltage is equal to or greater than the voltage threshold, send a disable instruction to the control unit 40.

[0089] It is easy to understand that since the specific working principle and implementation method of the handle electrode 70 have been received in the embodiment of the above-mentioned control circuit 100, they will not be repeated here.

[0090] exist Fig. 9 In this embodiment, the voltage detection unit 80 is connected to the power supply terminal 1011, and can sample the voltage of the power supply terminal 1011, thereby obtaining a corresponding sampled voltage and feeding it back to the control unit 40. The control unit 40 determines whether the power supply terminal 1011 is connected to the connection terminal 1021 according to the voltage change of the power supply terminal 1011, that is, determines whether the beauty accessory 102 is mounted on the host 101.

[0091] In a specific implementation, the power supply terminal 1011 may include two power supply electrodes disposed at intervals, and correspondingly, the connection terminal 1021 may also include two connection electrodes disposed at intervals.

[0092] Combination Figures 7 to 9 As an example, the power supply terminal 1011 may include a first power supply electrode 10111 and a second power supply electrode 10112, and the connection terminal 1021 includes a first connection electrode 10211 and a second connection electrode 10212. When the beauty accessory 102 is mounted on the host 101, the first power supply electrode 10111 and the first connection electrode 10211 are electrically connected to each other, and the second power supply electrode 10112 and the second connection electrode 10212 are electrically connected to each other. When the host 101 outputs working power to the beauty accessory 102, the current may be transmitted to the load node P21 through the first power supply electrode 10111 and the first connection electrode 10211, and then transmitted to the second connection electrode 10212 through the heating unit 20, and finally flow back to the micro-current output unit 50 in the host 101 or the ground terminal of the host 101 through the second power supply electrode 10112.

[0093] When the voltage detection unit 80 is used to detect the voltage of the power supply terminal 1011, specifically, the voltage of the first power supply electrode 10111 can be detected. For example, when the host 101 is not equipped with the beauty accessory 102, the voltage of the first power supply electrode 10111 is at a high level. When the beauty accessory 102 is installed on the host 101, the power supply circuit of the heating unit 20 in the beauty accessory 102 is turned on, and the voltage of the first power supply electrode 10111 is pulled down. At this time, according to the voltage being less than the voltage threshold, that is, according to the collected low level, it is determined that the beauty accessory 102 is installed on the host 101, and then an activation instruction is sent to the control unit 40. When the user removes the beauty accessory 102 from the host 101, the voltage of the first power supply electrode 10111 changes again, and then when the voltage is equal to or greater than the voltage threshold, a deactivation instruction is sent to the control unit 40.

[0094] The above scheme, by configuring a voltage detection unit in the host, can feedback the loading status of the beauty accessories and the host in the form of voltage, so that the control unit can respond to different control instructions according to the loading status, realize the intelligent activation and shutdown functions of the beauty instrument, and improve the intelligence level of the beauty instrument.

[0095] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units.

[0096] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A control circuit of a beauty instrument, characterized in that: Connected to a power source, the control circuit comprises: A contact electrode is used to contact the skin and output a microcurrent to the skin according to the working electricity; A heating unit is connected to the contact electrode to form a load node; the heating unit is used to work according to the working electricity and output heat to the contact electrode; A voltage conversion unit, used to convert the voltage of the electric energy provided by the power supply according to the power supply instruction, and output the target electric energy; a control unit, connected to the voltage conversion unit, and configured to output the power supply instruction to the voltage conversion unit; A micro-current output unit is connected to the voltage conversion unit and the control unit respectively, and is used to output the working power to the load node based on the target electric energy.

2. The control circuit according to claim 1, characterized in that: Also includes: a switch unit, coupled between the micro-current output unit and the load node, the switch unit being used to connect the path between the micro-current output unit and the load node according to a first switch control signal, and disconnect the path between the micro-current output unit and the load node according to a second switch control signal; The control unit is connected to the switch unit, and the control unit is further configured to output the first switch control signal to the switch unit according to an enable instruction, and output the second switch control signal to the switch unit according to a disable instruction.

3. The control circuit according to claim 2, characterized in that: Also includes: The handle electrode exposed on the surface of the beauty instrument is connected to the microcurrent output unit, and is used to form a conductive loop with the human body when the contact electrode outputs microcurrent to the skin according to the working electricity.

4. The control circuit according to claim 1, characterized in that: The heating unit comprises: A heating film is attached to the inner side of the contact electrode, and the heating film is used to output heat to the contact electrode according to the working electricity.

5. The control circuit according to claim 4, characterized in that: The heating unit further comprises: a thermostatic switch connected in series with the heating film, the thermostatic switch being used to detect the temperature of the heating film, and disconnecting the passage between the heating film and the load node when the temperature is equal to or greater than a temperature threshold, and connecting the passage between the heating film and the load node when the temperature is less than the temperature threshold; A load resistor is connected in parallel with the thermostatic switch, and the load resistor is used to form a series branch with the heating film when the thermostatic switch is disconnected.

6. The control circuit according to claim 1, characterized in that: The micro-current output unit comprises: a bias voltage output unit, connected to the voltage conversion unit, and configured to output a bias voltage according to the target electric energy; an operational amplifier unit, comprising a positive input terminal and a negative input terminal, wherein the positive input terminal is connected to the bias voltage output unit, and the negative input terminal is connected to the control unit; The control unit is further used to output a PWM signal to the operational amplifier unit; The operational amplifier unit is used to output the working power to the load node according to the PWM signal and the bias voltage.

7. The control circuit according to claim 6, characterized in that: The micro-current output unit also includes: The current enhancement unit is connected between the operational amplifier unit and the load node, and is used to amplify the current of the working electricity.

8. A beauty instrument, characterized in that: A control circuit for carrying the beauty instrument according to any one of claims 1, 4 to 7, the beauty instrument comprising: A host is configured with a power supply terminal; the host is at least used to set the voltage conversion unit, the control unit and the micro-current output unit; A beauty accessory detachably connected to the host is configured with a connection terminal, the connection terminal is connected to the load node, and the beauty accessory is at least used to set the contact electrode and the heating unit; Wherein, when the beauty accessory is installed on the host, the power supply terminal cooperates with the connection terminal to form a conductive path.

9. The beauty instrument according to claim 8, characterized in that: Also includes: a switch unit, configured on the host and coupled between the micro-current output unit and the power supply terminal, the switch unit being used to connect the path between the micro-current output unit and the power supply terminal according to a first switch control signal, and disconnect the path between the micro-current output unit and the power supply terminal according to a second switch control signal; The control unit is connected to the switch unit, and the control unit is further configured to output the first switch control signal to the switch unit according to an enable instruction, and output the second switch control signal to the switch unit according to a disable instruction.

10. The beauty instrument according to claim 9, characterized in that: Also includes: The handle electrode exposed on the surface of the host is connected to the micro-current output unit, and is used to form a conductive loop with the human body when the contact electrode outputs micro-current to the skin according to the working electricity; A voltage detection unit is configured on the host and connected between the control unit and the power supply terminal, and is used to detect the voltage of the power supply terminal, and when the voltage is less than a voltage threshold, sends the enable instruction to the control unit, and when the voltage is equal to or greater than the voltage threshold, sends the disable instruction to the control unit.

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