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. The control circuit of the beauty instrument comprises a light-emitting unit, a contact detection unit and a control unit. The contact detection unit is connected with the contact electrode, so that the contact condition of the contact electrode and the skin can be detected, and a corresponding contact detection electric signal is output according to the contact condition. As the contact detection electric signal can represent the contact condition of the contact electrode and the skin, the control unit can be utilized to output the corresponding first power control signal to the light emitting unit according to the contact detection electric signal, and then the light emitting unit is controlled to output corresponding light energy through the light emitting part. Therefore, when the beauty instrument is started and the user does not use the beauty instrument, the temperature of the light emitting part is prevented from rising due to the fact that the beauty instrument outputs large light energy, the instant burning feeling generated when the user uses the beauty instrument after the beauty instrument is started for a period of time is avoided, the use experience of the user is improved, and the use viscosity of the user is enhanced.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of beauty instruments, and particularly relates to a beauty instrument and a control circuit thereof. BACKGROUND

[0002] At present, a beauty instrument on the market can output physical energy to skin, so as to play a role in beauty care of the skin. For example, the beauty instrument can output light energy, and irradiate the skin through the light energy, so as to play a role in beauty care of the skin.

[0003] However, when the beauty instrument is powered on and not used by a user, the light energy output by the beauty instrument is continuously output through the light output part, so that the light output part continuously absorbs light energy heat, resulting in an increase in the temperature of the light output part. When the user uses it, an instantaneous burning sensation is easily generated, which affects the user experience. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a beauty instrument and a control circuit thereof, and aims to solve the problem of poor user experience of the above beauty instrument.

[0005] The first aspect of the application embodiment provides a control circuit of a beauty instrument, wherein the beauty instrument is configured with a light output part and a contact electrode arranged at intervals, and the control circuit comprises:

[0006] A light emitting unit for outputting light energy through the light output part;

[0007] A contact detection unit connected with the contact electrode, the contact detection unit being configured to detect a contact condition of the contact electrode and the skin, and output a corresponding contact detection electrical signal according to the contact condition;

[0008] A control unit connected with the light emitting unit and the contact detection unit respectively, the control unit being configured to receive the contact detection electrical signal, and output a first power control signal to the light emitting unit according to the contact detection electrical signal.

[0009] The second aspect of the application embodiment provides a beauty instrument comprising the control circuit of the beauty instrument provided in the first aspect.

[0010] The beneficial effects of the embodiment of the utility model compared with prior art are that: the control circuit of the above-mentioned beauty instrument is configured in the beauty instrument, wherein, the beauty instrument is configured with a light emitting part and a contact electrode arranged at intervals, the control circuit comprises: a light emitting unit, a contact detection unit and a control unit, the light emitting unit is used for outputting light energy through the light emitting part, the contact detection unit is connected with the contact electrode and is used for detecting the contact condition of the contact electrode and the skin and outputting corresponding contact detection electric signals according to the contact condition, the control unit is connected with the light emitting unit and the contact detection unit respectively, the control unit is used for receiving the contact detection electric signals and outputting first power control signals to the light emitting unit according to the contact detection electric signals, the above-mentioned scheme, the contact detection unit is connected with the contact electrode, the contact condition of the contact electrode and the skin can be detected, and corresponding contact detection electric signals are outputted according to the contact condition, since the contact detection electric signals can represent the contact condition of the contact electrode and the skin, the control unit can output corresponding first power control signals to the light emitting unit according to the contact detection electric signals, and then the light emitting unit outputs corresponding light energy through the light emitting part, thereby preventing the temperature of the light emitting part from rising due to the large light energy outputted by the beauty instrument when the beauty instrument is started and the user does not use it, avoiding the instantaneous burning sensation of the user when using the beauty instrument after the beauty instrument is started for a period of time, improving the user experience and being beneficial to enhancing the user stickiness. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 A structure schematic view of a control circuit of a beauty instrument is provided for the embodiment of the application;

[0012] Figure 2 A structure schematic view of a control circuit of a beauty instrument is provided for another embodiment of the application;

[0013] Figure 3 A specific structure schematic view of a control circuit of a beauty instrument is provided for the embodiment of the application;

[0014] Figure 4 A specific structure schematic view of a contact detection unit in a control circuit of a beauty instrument is provided for the embodiment of the application Figure 1 ;

[0015] Figure 5 A specific structure schematic view of a contact detection unit in a control circuit of a beauty instrument is provided for the embodiment of the application Figure 2 ;

[0016] Figure 6 A specific structure schematic view of a contact detection unit in a control circuit of a beauty instrument is provided for the embodiment of the application Figure 3 ;

[0017] Figure 7The specific circuit of the sampling branch and the comparison branch in the skin contact detection circuit of the beauty instrument provided by the embodiment of the present application Figure 1 ;

[0018] Figure 8 The specific circuit of the sampling branch and the comparison branch in the skin contact detection circuit of the beauty instrument provided by the embodiment of the present application Figure 2 ;

[0019] Figure 9 The structural schematic diagram of the beauty instrument provided by the embodiment of the present application. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved in the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0021] 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.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0024] At present, the beauty instrument on the market can output physical energy to the skin, thereby playing a role in beauty and maintenance of the skin. For example, the beauty instrument can output light energy, and irradiate the skin by the light energy, thereby playing a role in maintaining the skin.

[0025] However, when the cosmetic instrument is turned on and not used by the user, the light energy output by the cosmetic instrument continues to be output through the light output part, causing the light output part to continuously absorb light energy heat, resulting in an increase in the temperature of the light output part, which can easily cause a momentary burning sensation when the user uses it, affecting the user experience.

[0026] It is easy to understand that when the cosmetic instrument is used, the skin is irradiated with light energy, and at the same time, because the light output part is in contact with the skin, the skin can absorb the heat of the light output part. If the cosmetic instrument is turned on and not used by the user, the light energy output by the cosmetic instrument continues to be output through the light output part, and the light output part does not contact the skin for a long time to conduct heat, so that the heat of the light output part continues to rise. For example, when the temperature of the light output part rises to 40℃, the user uses the cosmetic instrument by attaching the light output part to the skin at this time, which can cause a momentary burning sensation of the skin, thereby affecting the user experience.

[0027] To solve the above technical problems, the embodiments of the present application provide a cosmetic instrument and a control circuit thereof. The control circuit of the cosmetic instrument is configured in the cosmetic instrument. The cosmetic instrument is configured with a light output part and a contact electrode arranged at intervals. The control circuit comprises a light emitting unit, a contact detection unit and a control unit. The light emitting unit is used to output light energy through the light output part. The contact detection unit is connected with the contact electrode and is used to detect the contact condition of the contact electrode and the skin and output a corresponding contact detection electrical signal according to the contact condition. The control unit is connected with the light emitting unit and the contact detection unit respectively. The control unit is used to receive the contact detection electrical signal and output a first power control signal to the light emitting unit according to the contact detection electrical signal.

[0028] The above scheme uses the contact detection unit connected with the contact electrode to detect the contact condition of the contact electrode and the skin and output a corresponding contact detection electrical signal according to the contact condition. Since the contact detection electrical signal can represent the contact condition of the contact electrode and the skin, the control unit can output a corresponding first power control signal to the light emitting unit according to the contact detection electrical signal, and then control the light emitting unit to output corresponding light energy through the light output part. Thus, when the cosmetic instrument is turned on and not used by the user, the temperature of the light output part is prevented from rising due to the output of large light energy by the cosmetic instrument, avoiding a momentary burning sensation when the user uses the cosmetic instrument after the cosmetic instrument has been turned on for a period of time, improving the user experience and enhancing the user's use stickiness.

[0029] Reference Figure 1 , Figure 1 The structure of the control circuit of the cosmetic instrument provided by the embodiments of the present application is shown. For ease of illustration, only the parts related to the present embodiment are shown, which are described in detail as follows:

[0030] In Figure 1In the embodiment, the cosmetic instrument is configured with a light emitting part 110 and a contact electrode 120 arranged at intervals. The control circuit 100 of the cosmetic instrument comprises a light emitting unit 10, a contact detecting unit 20 and a control unit 30. As shown in the figure, the light emitting unit 10 is used to output light energy through the light emitting part 110. The contact detecting unit 20 is connected with the contact electrode 120. The contact detecting unit 20 is used to detect the contact condition of the contact electrode 120 with the skin and output a corresponding contact detecting electric signal according to the contact condition. The control unit 30 is connected with the light emitting unit 10 and the contact detecting unit 20 respectively. The control unit 30 is used to receive the contact detecting electric signal and output a first power control signal to the light emitting unit 10 according to the contact detecting electric signal. Figure 1

[0031] It is easy to understand that the light emitting unit 10 is controlled by the control unit 30. The control unit 30 can control the output power of the light emitting unit 10 by outputting a power control signal to the light emitting unit 10. Based on this, by controlling the output power of the light emitting unit 10, the degree of heat accumulation inside the cosmetic instrument and / or the temperature rising rate of the light emitting part 110 in the process of the light emitting unit 10 outputting light energy can be indirectly controlled.

[0032] In the embodiment, the contact detecting unit 20 is connected with the contact electrode 120, and the contact condition of the skin can be detected by the electric signal feedback of the contact electrode 120, and then a corresponding contact detecting electric signal is output according to the contact condition. The control unit 30 can output a corresponding first power control signal according to the contact detecting electric signal, and then control the power of the light emitting unit 10. Here, the first power control signal generally refers to the control signal output by the control unit 30 according to the contact condition, which is used to adjust / control the working power / output power of the light emitting unit 10.

[0033] For example, when the contact electrode 120 is in contact with the skin, the contact detecting unit 20 outputs a corresponding contact detecting electric signal, such as a high level or a low level, according to the electric signal feedback of the contact electrode 120. At this time, the control unit 30 outputs a first first power control signal according to the contact detecting electric signal. When the contact electrode 120 is not in contact with the skin, the contact detecting unit 20 outputs a corresponding contact detecting electric signal, such as a low level or a high level, according to the electric signal feedback of the contact electrode 120. At this time, the control unit 30 outputs a second first power control signal according to the contact detecting electric signal.

[0034] ​In the above example, the light emitting unit 10 can work in a normal or higher power state according to the first power control signal of the first type, i.e. output normal or higher energy light energy through the light emitting part 110, and can work in a lower power state according to the first power control signal of the second type, i.e. output lower energy light energy through the light emitting part 110. Thus, the running power of the light emitting unit 10 and / or the degree of heat accumulation in the beauty instrument during the output of light energy and / or the temperature rising rate of the light emitting part 110 can be adaptively adjusted according to the contact between the contact electrode 120 and the skin.

[0035] In specific implementation, the light emitting unit 10 can specifically include any known circuit implementation of a beauty instrument light source. For example, the light emitting unit 10 can include a circuit of an LED light source. For another example, the light emitting unit 10 can include a circuit of a milk light source and / or a circuit of a near-infrared light source, etc., which is not limited here.

[0036] It is easy to understand that in specific use, after the light emitting part 110 of the beauty instrument contacts the skin, the light energy output by the light emitting unit 10 can act on the skin through the light emitting part 110. Based on this, in specific implementation, the contact electrode 120 can be arranged around the light emitting part 110, so that the contact between the light emitting part 110 and the skin can be detected.

[0037] As an example, the contact electrode 120 can be arranged around the light emitting part 110. For example, the contact electrode 120 can specifically be two or more contact electrodes, and the two or more contact electrodes are arranged around the light emitting part 110.

[0038] In specific implementation, the contact detection unit 20 can specifically include a sampling circuit and / or an amplification circuit. For example, the contact detection unit 20 includes a sampling circuit, which can sample the current and / or voltage of the contact electrode 120, and take the sampled current and / or voltage as the contact detection electrical signal. For another example, the contact detection unit 20 includes a sampling circuit and an amplification circuit, which uses the sampling circuit to sample the current and / or voltage of the contact electrode 120, uses the amplification circuit to amplify the sampled current and / or voltage, and then takes the amplified current and / or voltage as the contact detection electrical signal.

[0039] It is easy to understand that, since the contact detection electrical signal can indicate or represent the contact condition of the contact electrode and the skin, the contact detection unit 20 outputs the corresponding contact detection electrical signal to the control unit 30 according to the contact condition. Here, the control unit 30 can be realized by a control circuit including a processor. In a specific implementation, the processor can take the contact detection electrical signal as an input signal and take the first power control signal as an output signal, that is, the processor outputs the corresponding first power control signal to the light emitting unit according to the contact condition of the contact electrode and the skin indicated or represented by the contact detection electrical signal.

[0040] In combination with the above examples, in one example, the contact detection electrical signal is high or low when the contact electrode 120 is in contact with the skin. When the contact electrode 120 is in contact with the skin, the contact detection unit 20 outputs high or low to the processor in the control unit 30. The processor in the control unit 30 outputs the first first power control signal to the light emitting unit 10 according to the high or low. Here, the light emitting unit 10 works in a normal or higher power state according to the first first power control signal, that is, outputs normal or higher energy light energy through the light emitting part 110.

[0041] In combination with the above examples, in another example, the contact detection electrical signal is low or high when the contact electrode 120 is not in contact with the skin. When the contact electrode 120 is not in contact with the skin, the contact detection unit 20 outputs low or high to the processor in the control unit 30. The processor in the control unit 30 outputs the second first power control signal to the light emitting unit 10 according to the low or high. Here, the light emitting unit 10 works in a lower power state or 0 power state according to the second first power control signal, that is, outputs lower energy light energy through the light emitting part 110 or the light emitting part 110 does not output light energy.

[0042] In some embodiments, the contact detection electrical signal is output only when the contact electrode 120 is in contact with the skin, i.e., the contact detection electrical signal is only used to represent that the contact electrode 120 is in contact with the skin. Correspondingly, when the processor in the control unit 30 receives the contact detection electrical signal, the processor outputs a first power control signal to the light emitting unit 10, and the first power control signal can control the light emitting unit 10 to work at a high power or a normal power. Accordingly, when the contact electrode 120 is not in contact with the skin, the contact detection unit 20 can not output any electrical signal to the processor in the control unit 30. The processor in the control unit 30 can control the light emitting unit 10 to stop working, i.e., stop outputting light energy. In this way, it is ensured that the light emitting unit 10 is controlled to work at a high power or a normal power when the contact electrode 120 is in contact with the skin. Moreover, the light emitting unit 10 can be controlled to stop working when the contact electrode 120 is not in contact with the skin, so as to avoid heat accumulation in the beauty instrument and / or temperature rise of the light emitting part during operation of the light emitting unit 10 and / or output of light energy.

[0043] The above scheme uses the contact detection unit connected with the contact electrode to detect the contact between the contact electrode and the skin, and output a corresponding contact detection electrical signal according to the contact. Since the contact detection electrical signal can represent the contact between the contact electrode and the skin, the control unit can output a corresponding first power control signal to the light emitting unit according to the contact detection electrical signal, and then control the light emitting unit to output corresponding light energy through the light emitting part. That is, the output power of the light emitting unit can be adaptively adjusted according to the contact between the contact electrode and the skin, so as to adjust the heat accumulation in the beauty instrument and / or the temperature rise rate of the light emitting part during operation of the light emitting unit and / or output of light energy. Thus, the temperature rise of the light emitting part due to the output of large light energy by the beauty instrument when the beauty instrument is turned on and not used by the user is prevented, the instantaneous burning sensation of the user when using the beauty instrument after the beauty instrument is turned on for a period of time is avoided, the user experience is improved, and the user's use adherence is enhanced.

[0044] Figure 2 A structure diagram of a control circuit of a beauty instrument is shown. The control circuit of the beauty instrument shown in the structure diagram is different from the control circuit of the beauty instrument shown in the structure diagram of FIG. 1 in that, Figure 1 The control circuit 100 of the beauty instrument shown in the structure diagram is different from the control circuit of the beauty instrument shown in the structure diagram of FIG. 1 in that, Figure 2 The control circuit 100 of the beauty instrument shown in the structure diagram further includes a movement detection unit 40. Specifically,

[0045] As shown in FIG. 4, the movement detection unit 40 includes a movement detection electrode 41 and a movement detection electrode 42. Figure 2As shown, the movement detection unit 40 is connected with the control unit 30. The movement detection unit 40 is configured to detect the movement of the beauty instrument, and output a corresponding movement detection electrical signal according to the movement. Correspondingly, the control unit 30 is also configured to receive the movement detection electrical signal, and output a second power control signal to the light emitting unit 10 according to the movement detection electrical signal.

[0046] In this embodiment, the movement detection unit 40 is connected with the control unit 30. The movement detection unit 40 can monitor the movement of the beauty instrument in actual use in real time, and output a corresponding movement detection electrical signal to the control unit 30. The movement detection electrical signal refers to the electrical signal output by the movement detection unit 40 to the control unit 30. The second power control signal refers to the control signal output by the control unit 30 to the light emitting unit 10 according to the movement detection electrical signal. Here, the second power control signal is similar to the first power control signal, and can be used to adjust / control the working power / output power of the light emitting unit 10.

[0047] In specific implementation, the movement detection unit 40 can be implemented by using a movement sensor, a gyroscope sensor, etc. By connecting the movement sensor and / or the gyroscope sensor with the signal input end of the control unit 30, the movement sensor and / or the gyroscope sensor can generate a corresponding electrical signal according to the movement of the beauty instrument during use of the beauty instrument, and transmit the electrical signal to the control unit 30 as the movement detection electrical signal.

[0048] As an example, the movement detection unit 40 includes an accelerometer and / or a gyroscope. The accelerometer is connected with the control unit, and is configured to detect the acceleration component of the beauty instrument as the movement detection electrical signal. The gyroscope is connected with the control unit, and is configured to detect the angle change information of the beauty instrument as the movement detection electrical signal.

[0049] It is easy to understand that, when the movement detection unit 40 includes the accelerometer, since the accelerometer can detect the acceleration component of the beauty instrument, when the accelerometer detects the acceleration component of the beauty instrument, a corresponding electrical signal can be generated according to the acceleration component, and the electrical signal is used as the movement detection electrical signal. Similarly, when the movement detection unit 40 includes the gyroscope, since the gyroscope can detect the angle change information of the beauty instrument, when the gyroscope detects the angle change of the beauty instrument, a corresponding electrical signal can be generated according to the angle change, and the electrical signal is used as the movement detection electrical signal.

[0050] In specific implementation, the movement detection unit 40 can detect the acceleration component and / or the angle change information of the beauty instrument as the movement detection electrical signal when the light emitting unit 10 is working at the first power.

[0051] As an example, the moving detection unit 40 outputs a moving detection electrical signal as a high level when the cosmetic instrument is moved in actual use. When the moving detection unit 40 detects that the cosmetic instrument is moved, it outputs a corresponding high level signal as the moving detection electrical signal. Correspondingly, the control unit 30 receives the high level signal and outputs a second power control signal to the light emitting unit 10.

[0052] As an example, when the contact electrode 120 is in contact with the skin, the contact detection unit 20 outputs a contact detection electrical signal, such as a first high level, to the control unit 30. The control unit 30 outputs a first power control signal of a first kind to the light emitting unit 10 according to the first high level. Here, the light emitting unit 10 works in a normal or higher power state according to the first power control signal of the first kind, i.e. outputs normal or higher energy light energy through the light emitting part 110. At this time, when the moving detection unit 40 detects that the cosmetic instrument is not moved, it outputs a corresponding moving detection electrical signal, such as a first low level. Correspondingly, the control unit 30 outputs a second power control signal to the light emitting unit 10 according to the first low level. Here, the light emitting unit 10 switches from the normal or higher power state to a lower power state according to the second power control signal, i.e. outputs lower energy light energy or stops outputting light energy through the light emitting part 110.

[0053] As an example, when the contact electrode 120 is not in contact with the skin, the contact detection unit 20 outputs a contact detection electrical signal, such as a second low level, to the control unit 30. The control unit 30 outputs a first power control signal of a second kind to the light emitting unit 10 according to the second low level. Here, the light emitting unit 10 works in a lower power state or 0 power state according to the first power control signal of the second kind, i.e. outputs lower energy light energy or stops outputting light energy through the light emitting part 110. At this time, the moving detection unit 40 does not work.

[0054] For example, the moving detection unit 40 can be powered by the control unit 30, and when the contact electrode 120 is not in contact with the skin, the control unit 30 can stop supplying power to the moving detection unit 40, so that the moving detection unit 40 does not work.

[0055] For another example, the control unit 30 is also connected to the enable end of the moving detection unit 40, and when the contact electrode 120 is not in contact with the skin, the control unit 30 can pull down the voltage of the enable end of the moving detection unit 40, so that the moving detection unit 40 does not work.

[0056] The above scheme, the movement detection unit 40 is connected with the control unit 30, the movement of the beauty instrument is detected by the movement detection unit 40, and the corresponding movement detection signal is output according to the movement. And use the control unit 30 according to the movement detection signal to the light emitting unit 10 output second power control signal. According to the movement of the beauty instrument, the working power of the light emitting unit 10 and / or the intensity of the output light energy are adjusted, which can avoid the user from moving position when using the beauty instrument, resulting in excessive output of light energy or causing burning sensation to the same area of skin. It can further improve the user experience and improve the user stickiness.

[0057] Figure 3 The specific structure of the control circuit of the beauty instrument provided by the embodiment of the application is shown. As shown in Figure 3 The light emitting unit 10 is configured with a light source 11. The light emitting unit 10 is specifically used for controlling the light source 11 to output light energy according to the first power control signal according to the first power, and controlling the light source 11 to output light energy according to the second power control signal according to the second power, wherein the first power is equal to less than the second power.

[0058] In this embodiment, the light source 11 generally refers to the light source circuit which outputs light energy through the light emitting part 110. For example, the light source 11 can be at least one of LED light source circuit, halogen lamp light source circuit, laser light source circuit and near infrared light source circuit.

[0059] In specific implementation, the light emitting unit 10 can also be configured with energy storage circuit or power supply circuit corresponding to the light source 11, for providing corresponding electric energy for the light source 11.

[0060] For example, the light emitting unit 10 can also include at least one of voltage conversion circuit, current source and energy storage device.

[0061] As an example, the light emitting unit 10 can also be configured with voltage conversion circuit, which converts direct current to output electric energy suitable for the light source 11. And / or, the light emitting unit 10 can also be configured with current source, which is used to provide suitable working current for the light source 11. And / or, the light emitting unit 10 can also be configured with energy storage device, which is used to provide suitable working voltage for the light source 11.

[0062] As one embodiment, the light-emitting unit 10 controls the light source 11 to output light energy at a first power according to a first power control signal. Here, when the contact electrode 120 is in contact with the skin, the light-emitting unit 10 controls the light source 11 to output light energy at the first power, specifically, it can control the light source 11 to operate in a normal power state or a higher power state. In this case, the output power of the light source 11 can be represented by P1. When the contact electrode 120 is not in contact with the skin, the light-emitting unit 10 controls the light source 11 to output light energy at the first power, specifically, it can control the light source 11 to operate in a lower power state or a 0 power state. In this case, the output power of the light source 11 can be represented by P1', where P1' < P1.

[0063] In the above embodiment, the light-emitting unit 10 controls the light source 11 to output light energy at the second power according to the second power control signal. Here, when the beauty device is moved during use, the light-emitting unit 10 controls the light source 11 to output light energy at the second power, specifically, it can control the light source 11 to work in a normal power state or a higher power state. At this time, the output power of the light source 11 can be represented by P2. When the beauty device is not moved during use, the light-emitting unit 10 controls the light source 11 to output light energy at the second power, specifically, it can control the light source 11 to work in a lower power state or a 0 power state. At this time, the output power of the light source 11 can be represented by P2', where P2' < P2.

[0064] Based on this, during the process of the light-emitting unit 10 controlling the light source 11 to output light energy according to the power control signal, the first power (P1, P1') is equal to or less than the second power (P2, P2'). That is, the light-emitting unit 10 controls the light source 11 to output light energy according to the power control signal, satisfying P1'<P1≤P2'<P2.

[0065] Understandably, in practical implementation, the light source 11 is controlled to output light energy at different power levels according to different power control signals. Specifically, this can be achieved by controlling the current and / or voltage of the light source 11 according to different power control signals. In actual implementation, a corresponding control circuit or power supply circuit can be configured for the light source 11 according to the implementation requirements of the beauty device's control circuit, so as to provide suitable electrical energy to the light source 11. Based on this, the power control of the light source 11 when outputting light energy can be achieved by controlling the output current and / or voltage of the control circuit or power supply circuit.

[0066] Figure 4 This application illustrates the specific structure of the contact detection unit in the control circuit of a beauty device according to an embodiment of the present application. Figure 1 .like Figure 4As shown, in one embodiment, the contact electrode 120 includes a first contact electrode 121 and a second contact electrode 122. The contact detection unit includes a current output unit 21 and a detection unit 22.

[0067] like Figure 4 As shown, in this embodiment, the current output unit 21 is configured with a first output node 211, a second output node 212, and a loop node 213. The first output node 211 is connected to the first contact electrode 121, the second output node 212 is connected to the second contact electrode 122, and the loop node 213 is coupled to ground. The current output unit 21 is also connected to the control unit 30. The current output unit 21 is used to output current pulses, which are applied to the skin through the first contact electrode 121 and the second contact electrode 122. The current pulses serve as a contact detection electrical signal.

[0068] exist Figure 4 In this circuit, the detection unit 22 is coupled between the loop node 213 and ground, and is also connected to the control unit 30. The detection unit 22 is used to sample the voltage of the loop node 213, send the sampled voltage value as a contact detection electrical signal to the control unit 30, or compare the sampled voltage value with a threshold and output a contact detection electrical signal based on the comparison result.

[0069] In this embodiment, the first output node 211 of the current output unit 21 can also be regarded as the first output terminal of the current output unit 21. Similarly, the second output node 212 of the current output unit 21 can also be regarded as the second output terminal of the current output unit 21. The loop node 213 can be regarded as the ground connection terminal or loop connection terminal of the current output unit 21, used for coupling to ground.

[0070] In a practical implementation, the current output unit 21 can be a circuit unit composed of at least two switching circuits, or a chip unit including at least two switching circuits. Correspondingly, the first output node 211 and the second output node 212 can be solder joints of the current output unit 21 on the circuit board, or two pins of the current output unit 21. Through internal wiring within the beauty device, they can be connected to the first contact electrode 121 and the second contact electrode 122. Similarly, since the loop node 213 can be considered as the ground connection terminal or loop connection terminal of the current output unit 21, in a practical implementation, the loop node 213 can also be a ground solder joint of the current output unit 21 on the circuit board, or a ground pin of the current output unit 21.

[0071] It can be understood that the current output unit 21 can be an EMS output unit, when the first contact electrode 121 and the second contact electrode 122 contact the skin, the current output unit 21 can provide the generated current pulse as an EMS pulse according to the PWM signal provided by the control unit 30. In addition, the current output unit 21 can also be a radio frequency output unit for outputting radio frequency current to the skin.

[0072] For example, the current pulse generally refers to a pulse current of 1 Hz to 1500 Hz, and when acting on the skin through the first contact electrode 121 and the second contact electrode 122, the pulse current can be two groups of pulse currents with opposite flow directions that appear alternately.

[0073] For example, the flow direction of the first pulse current is from the first contact electrode 121, through the skin to the second contact electrode 122, and the flow direction of the second pulse current is from the second contact electrode 122, through the skin to the first contact electrode 121.

[0074] For example, the flow direction of the first pulse current is from the second contact electrode 122, through the skin to the first contact electrode 121, and the flow direction of the second pulse current is from the first contact electrode 121, through the skin to the second contact electrode 122.

[0075] Here, the specific frequency parameter range of the current pulse can also be configured according to actual needs. For example, according to different working modes or gears, etc., the frequency range of the current pulse is configured. For example, in the first gear working mode, the frequency range of the current pulse can be 1 Hz to 5 Hz. In the second gear working mode, the frequency range of the current pulse can be 10 Hz to 15 Hz. In the third working mode, the frequency range of the current pulse can be 20 Hz to 25 Hz, etc.

[0076] It can be understood that the first contact electrode 121 and the second contact electrode 122 can be connected with the loop node 213 through internal wiring, internal branch or internal device in the current output unit 21 respectively. Based on this, when the first contact electrode 121 and the second contact electrode 122 contact the skin at the same time, the skin can be used as a conductor between the first contact electrode 121 and the second contact electrode 122, so that the first contact electrode 121 and the second contact electrode 122 are connected to form a closed loop with the first output node 211, the second output node 212 and the loop node 213 in the current output unit 21. Since the detection unit 22 is connected with the loop node 213, when the alternating current pulses are output through the first output node 211 and the second output node 212 and act on the skin through the first contact electrode 121 and the second contact electrode 122, the detection unit 22 can sample the corresponding voltage value. Based on this, when the sampling voltage value is equal to or greater than a threshold value, the detection unit 22 can output a first electrical signal for indicating that the first contact electrode 121 and the second contact electrode 122 contact the skin.

[0077] As an example, since the first electrical signal output by the detection unit 22 is used to indicate that the first contact electrode 121 and the second contact electrode 122 contact the skin, in actual application, the detection unit 22 can be connected with the control unit 30, and after the control unit 30 receives the first electrical signal, the working mode of the beauty instrument can be adjusted according to the preset control strategy, or the intensity of the current pulses output by the current output unit 21 can be adjusted.

[0078] The above scheme uses the first output node of the current output unit to connect the first contact electrode, and uses the second output node to connect the second contact electrode. When the first contact electrode and the second contact electrode contact the skin, the first output node, the second output node and the loop node of the current output unit can form a closed loop. Under the action of the current pulse, the detection unit can sample a voltage value equal to or greater than a threshold value at the loop node, and then output a first electrical signal for indicating that the first contact electrode and the second contact electrode contact the skin. This implementation can realize skin contact detection without using a sensor, which not only does not need to reserve a large sensor configuration space, but also does not need to perform additional configuration at the software level, and can reduce the implementation cost of skin contact detection.

[0079] Figure 5 A specific structure of a contact detection unit in a control circuit of a beauty instrument is shown Figure 2 As shown in Figure 5 , as an example, the contact detection unit 20 further includes a power supply unit 23.

[0080] In Figure 5In this configuration, the power supply unit 23 is connected to the current output unit 21. The power supply unit 23 is used to provide operating power to the current output unit 21.

[0081] In this embodiment, the power supply unit 23 provides electrical energy to the current output unit 21, specifically by providing direct current (DC) power. Therefore, the power supply unit 23 can also be considered the power source inside the beauty device. The current output unit 21 can generate current pulses using the DC power under the action of the PWM signal pair provided by the control unit 30.

[0082] In a practical implementation, the power supply unit 23 can be configured in the main body of the beauty device along with the contact detection unit 20, or it can be configured in the power adapter connected to the main body. Here, the power supply unit 23 can be connected to a power source, which can be AC ​​or DC power, without limitation.

[0083] As an example, taking AC power as the power source, the power supply unit 23 can convert the AC power output from the AC power source into DC power, then perform voltage conversion on the DC power, and then output the corresponding DC power to the current output unit 21.

[0084] It is easy to understand that, in practical implementation, the power supply unit 23 can be configured with an AC / DC conversion circuit to convert AC power into DC power, and can also be configured with a DC voltage conversion circuit to convert the AC power into DC power. Of course, the power supply unit 23 can also be configured with multi-stage voltage conversion units to convert the DC power into DC power, and then output DC power with different voltage values ​​as working power for use by various units.

[0085] Based on the above example, a DC voltage conversion unit, such as a DC-DC voltage conversion circuit, can also be configured at the output end of the power supply unit 23. Based on the electrical energy output by the power supply unit 23, the voltage can be boosted or bucked to provide the power supply voltage for specific components in the circuit. For example, it can be a DC voltage with a voltage value in the range of 5 to 3.3V.

[0086] It is understandable that since AC / DC conversion and DC voltage transformation can both be achieved using existing conversion or transformation circuits, they will not be elaborated upon here.

[0087] Figure 6 This application illustrates the specific structure of the contact detection unit in the control circuit of a beauty device according to an embodiment of the present application. Figure 3 .like Figure 6 As shown, in one embodiment, the current output unit 21 includes a first bridge branch 101 and a second bridge branch 102. In this embodiment, the PWM signal pair includes a first PWM signal provided by the control unit and a second PWM signal provided by the control unit.

[0088] The first bridge branch 101 is configured with a first voltage terminal 1011, a first controlled terminal 1012, a second controlled terminal 1013, and a first loop terminal 1014. The second bridge branch 102 is configured with a second voltage terminal 1021, a third controlled terminal 1022, a fourth controlled terminal 1023, and a second loop terminal 1024.

[0089] The first voltage terminal 1011 is connected with the second voltage terminal 1021 to form a first node P1 for inputting working power. The first controlled terminal 1012 and the fourth controlled terminal 1023 are both used for inputting a first PWM signal provided by a control unit, and the second controlled terminal 1013 and the third controlled terminal 1022 are both used for inputting a second PWM signal provided by the control unit. The first loop terminal 1014 is connected with the second loop terminal 1024 to form a second node P2 as a loop node 213.

[0090] For example, in a specific implementation, the first bridge branch 101 and the second bridge branch 102 can have the same structure. In some embodiments, the first bridge branch 101 and the second bridge branch 102 can be connected through a loop resistance 14. That is, the first bridge branch 101 and the second bridge branch 102 can specifically be a circuit symmetrical about the central axis of the loop resistance 14.

[0091] In a specific implementation, the first bridge branch 101 and the second bridge branch 102 can both be a switching path composed of electronic switches or switching tubes. The PWM signal pair includes the first PWM signal and the second PWM signal, and the first PWM signal and the second PWM signal are a signal pair of staggered peaks or a signal pair of complementary frequencies. That is, in a unit cycle, at one time, when the first PWM signal is high, the second PWM signal is low, and when the first PWM signal is low, the second PWM signal is high. That is, the first PWM signal and the second PWM signal are both opposite level signals at a certain time.

[0092] Based on this, taking the complementary signal pair of the first PWM signal and the second PWM signal as an example, the first PWM signal can be high at the first time in the unit cycle, and the second PWM signal can be high at the second time in the unit cycle. For example, in the case where the first controlled end 1012 of the first bridge branch 101 and the fourth controlled end 1023 of the second bridge branch 102 are both used to input the first PWM signal, it can be determined that the controlled frequencies of the first controlled end 1012 and the fourth controlled end 1023 are the same. Therefore, under the action of the first PWM signal, at the first time in the unit cycle, the first bridge branch 101 and the second bridge branch 102 can be conducted through the first output node 211, the loop resistance 14 and the second output node 212. Similarly, since the second controlled end 1013 of the first bridge branch 101 and the third controlled end 1022 of the second bridge branch 102 are both used to input the second PWM signal, that is, the controlled frequencies of the second controlled end 1013 and the third controlled end 1022 are the same, therefore, under the action of the second PWM signal, at the second time in the unit cycle, the first bridge branch 101 and the second bridge branch 102 can be conducted through the first output node 211, the loop resistance 14 and the second output node 212.

[0093] In the present example, when the first contact electrode 121 and the second contact electrode 122 contact the skin, since there are two conduction circuits between the first bridge branch 101 and the second bridge branch 102 in the unit cycle, at least two current pulse actions can be applied to the skin in the unit cycle, thereby effectively increasing the action density of the current pulse and improving the overall utilization rate of the beauty instrument.

[0094] It can be understood that in specific implementation, the current output unit 21 can be implemented by an H-bridge EMS circuit composed of electronic switches. Specifically, the nodes in the H-bridge EMS circuit can be correspondingly configured with the first output node 211, the second output node 212 and the loop node 213 in the present embodiment, and the specific circuit of the current output unit 21 will not be described here.

[0095] As an embodiment, the detection unit 22 includes a sampling branch. The sampling end of the sampling branch is connected with the loop node, and the output end of the sampling branch is connected with the control unit. The sampling branch is used for voltage sampling of the loop node and outputs the sampled voltage value.

[0096] As Figure 6As shown in the illustration, in one embodiment, the detection unit 22 includes a sampling branch 221 and a comparison branch 222. The sampling end of the sampling branch 221 is connected to the loop node 213, and the output end of the sampling branch 221 is connected to the comparison branch 222. The sampling branch 221 is used to sample the voltage of the loop node 213 and output the sampled voltage value. The comparison branch 222 is connected to the control unit 30 and is used to compare the sampled voltage value with a threshold value and output a contact detection electrical signal based on the comparison result.

[0097] In this embodiment, sampling branch 221 can sample the voltage of loop node 213 and transmit the sampled voltage value to comparison branch 222 as an electrical signal. Comparison branch 222 can output a contact detection electrical signal representing the comparison result by comparing the electrical signal with a voltage representing a threshold.

[0098] In a specific implementation, sampling branch 221 can be a sampling circuit including a sampling resistor, and comparison branch 222 can include a comparator. The sampling circuit can sample the voltage of loop node 213 and then input it to the input of the comparator. The comparator compares the sampled voltage with a threshold voltage, thereby achieving the comparison between the sampled voltage value and the threshold.

[0099] It is understandable that, in specific implementations, sampling branch 221 can also be implemented by voltage division of loop node 213 by other voltage sampling circuits. Correspondingly, comparison branch 222 can also be implemented using other existing circuits with comparison functions, which will not be elaborated here.

[0100] Figure 7 This application illustrates the specific circuitry of the sampling branch and comparison branch in the skin contact detection circuit of a beauty device according to an embodiment of this application. Figure 1 .like Figure 7 As shown, in one embodiment, the sampling branch 221 includes: a first sampling resistor R11, a second sampling resistor R12, a diode D1, and an RC filter branch 2211.

[0101] The first terminal of the first sampling resistor R11 serves as the sampling terminal. The second terminal of the first sampling resistor R11 is connected to the first terminal of the second sampling resistor R12, forming the first output node Pout. The second terminal of the second sampling resistor R12 is grounded. The first output node Pout is connected to the first terminal of the RC filter branch 2211. The second terminal of the RC filter branch 2211 serves as the output terminal of the sampling branch 221. The cathode of diode D1 is connected to the output terminal of the sampling branch 221, and the anode of diode D1 is grounded.

[0102] In the embodiment, the first sampling resistor R11 and the second sampling resistor R12 are connected in series, which can play a role of limiting the current of the loop node 213. The RC filtering branch 2211 is connected to the first node P1, which can filter the noise of the sampled voltage. Since the forward conduction voltage and the reverse cut-off voltage of the diode D1 are fixed, the output voltage range of the circuit can be limited. Therefore, the cathode of the diode D1 is connected to the output end of the sampling branch 221, and the anode of the diode D1 is grounded, which can play a role of limiting the voltage of the output end of the sampling branch 221.

[0103] In a specific implementation, the RC filtering branch 2211 can be a filtering circuit composed of a plurality of capacitors and resistors.

[0104] As shown in FIG. 6, as an example, a resistor R can be coupled between the circuits of the at least two capacitors (C1, C2) in parallel to form a π-shaped RC filtering circuit. The first end of the resistor R is coupled to the ground through a capacitor C1, the second end of the resistor R is coupled to the ground through another capacitor C2, and the diode D1 is connected in parallel with the other capacitor C2. That is, the first end of the resistor R is used as the first end of the RC filtering branch 2211, and the second end of the resistor R is used as the second end of the RC filtering branch 2211. Figure 7 As shown in FIG. 6, as an example, a resistor R can be coupled between the circuits of the at least two capacitors (C1, C2) in parallel to form a π-shaped RC filtering circuit. The first end of the resistor R is coupled to the ground through a capacitor C1, the second end of the resistor R is coupled to the ground through another capacitor C2, and the diode D1 is connected in parallel with the other capacitor C2. That is, the first end of the resistor R is used as the first end of the RC filtering branch 2211, and the second end of the resistor R is used as the second end of the RC filtering branch 2211.

[0105] Figure 7 As shown in FIG. 6, as an example, a resistor R can be coupled between the circuits of the at least two capacitors (C1, C2) in parallel to form a π-shaped RC filtering circuit. The first end of the resistor R is coupled to the ground through a capacitor C1, the second end of the resistor R is coupled to the ground through another capacitor C2, and the diode D1 is connected in parallel with the other capacitor C2. That is, the first end of the resistor R is used as the first end of the RC filtering branch 2211, and the second end of the resistor R is used as the second end of the RC filtering branch 2211.

[0106] Here, the inverting input end of the comparator U1 inputs the preset reference voltage Vref, which is used to describe the threshold value. The comparator U1 compares the sampling voltage value at the non-inverting input end with the threshold value, and outputs the corresponding electrical signal as the comparison result of the sampling voltage value and the threshold value through the output end OUT, that is, the contact detection electrical signal.

[0107] For example, when the sampled voltage value is equal to or greater than the preset reference voltage Vref, it indicates that the sampled voltage value is equal to or greater than the threshold value, and the first contact detection electrical signal indicating that the first contact electrode and the second contact electrode are in contact with the skin is output through the output end OUT.

[0108] For another example, when the sampled voltage value is less than the preset reference voltage Vref, it indicates that the sampled voltage value is less than the threshold value, and the second contact detection electrical signal indicating that the first contact electrode and the second contact electrode are not in contact with the skin is output through the output end OUT.

[0109] Figure 8 ​This application illustrates the specific circuitry of the sampling branch and comparison branch in the skin contact detection circuit of a beauty device according to an embodiment of this application. Figure 2 As an example, with Figure 7 In comparison, Figure 8 In the embodiment shown, the sampling branch 221 further includes: a third sampling resistor R13, a fourth sampling resistor R14, and a sampling switch Q11.

[0110] The first end of the third sampling resistor R13 is connected to the cathode of diode D1, the second end of the third sampling resistor R13 is connected to the controlled end of sampling switch Q11, the high potential end of sampling switch Q11 is connected to the preset power supply VIO, the low potential end of sampling switch Q11 and the first end of the fourth sampling resistor R14 are connected to the cathode of diode D1, and the second end of the fourth sampling resistor R14 is grounded.

[0111] In this embodiment, the sampling branch 221 also has another output terminal 2213. For example... Figure 7 As shown, specifically, the third sampling resistor R13 is connected between the controlled terminal of the sampling switch Q11 and the cathode of the diode D1, and the high-potential terminal of the sampling switch Q11 is connected to the preset power supply VIO. Here, since the cathode of the diode D1 is connected to the output terminal 2212 of the sampling branch 221, the third sampling resistor R13 is equivalent to being connected between the controlled terminal of the sampling switch Q11 and the output terminal 2213 of the sampling branch 221. The low-potential terminal of the sampling switch Q11 and the first terminal of the fourth sampling resistor R14 are connected to the output terminal of the sampling branch 221, forming the output node Pout. When the output terminal 2212 of the sampling branch 221 outputs a sampling voltage, the sampling switch Q11 conducts under the sampling voltage and the voltage provided by the preset power supply VIO. The voltage at the output node Pout is affected by the sampling voltage and the current after the sampling switch Q11 is turned on, and a corresponding electrical signal is output through the other output terminal of the sampling branch 221.

[0112] In this embodiment, by Figure 8 By adding a third sampling resistor R13, a fourth sampling resistor R14, and a sampling switch Q11 to the sampling branch 221 shown, another output branch can be constructed. A corresponding electrical signal can then be output through the other output terminal 2213 of the sampling branch 221. In practical applications, the other output terminal 2213 of the sampling branch 221 can be connected to a processor or other detection unit to obtain the actual operating status of the current output unit, or to perform corresponding control operations based on this actual operating status, providing a basis for expanding the functionality of the beauty device.

[0113] Figure 9 A schematic diagram of the structure of a beauty device provided in an embodiment of this application is shown. Figure 9As shown, the cosmetic instrument 200 includes the control circuit 100 of the cosmetic instrument provided in any of the embodiments of the present application.

[0114] It can be understood that, in Figure 9 the embodiments shown, due to the improvement points and specific implementation manners related to the present application, which have been described in detail in the corresponding embodiments, and therefore will not be repeated here. Figures 1 to 8 the embodiments shown, due to the improvement points and specific implementation manners related to the present application, which have been described in detail in the corresponding embodiments, and therefore will not be repeated here.

[0115] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of software functional unit.

[0116] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A control circuit of a cosmetic apparatus, characterized by, The cosmetic instrument is configured with a light output part and a contact electrode arranged at intervals, and the control circuit comprises: a light emitting unit for outputting light energy through the light output part; a contact detection unit connected with the contact electrode, the contact detection unit being configured to detect a contact condition of the contact electrode with the skin and output a corresponding contact detection electrical signal according to the contact condition; a control unit connected with the light emitting unit and the contact detection unit respectively, the control unit being configured to receive the contact detection electrical signal and output a first power control signal to the light emitting unit according to the contact detection electrical signal.

2. The control circuit of a cosmetic apparatus according to claim 1, characterized in that, Further comprising: a movement detection unit connected with the control unit, the movement detection unit being configured to detect a movement condition of the cosmetic instrument and output a corresponding movement detection electrical signal according to the movement condition; the control unit being further configured to receive the movement detection electrical signal and output a second power control signal to the light emitting unit according to the movement detection electrical signal.

3. The control circuit of a cosmetic device according to claim 2, wherein The light emitting unit is configured with a light source, and the light emitting unit is specifically configured to control the light source to output light energy at a first power according to the first power control signal and control the light source to output light energy at a second power according to the second power control signal, wherein the first power is equal to or less than the second power.

4. The control circuit of the cosmetic apparatus according to claim 1 or 2, characterized in that, The contact electrode comprises a first contact electrode and a second contact electrode; The contact detection unit comprises a current output unit and a detection unit; The current output unit is configured with a first output node, a second output node and a loop node, the first output node is connected with the first contact electrode, the second output node is connected with the second contact electrode, and the loop node is coupled with the ground; The current output unit is further connected with the control unit, and the current output unit is configured to output a current pulse, the current pulse acting on the skin through the first contact electrode and the second contact electrode, wherein the current pulse serves as the contact detection electrical signal; The detection unit is coupled between the loop node and the ground, and the detection unit is further connected with the control unit, and the detection unit is configured to sample a voltage value of the loop node, send the sampled voltage value to the control unit as the contact detection electrical signal, or compare the sampled voltage value with a threshold value and output the contact detection electrical signal according to the comparison result.

5. The control circuit of the cosmetic apparatus according to claim 4, characterized by, The contact detection unit further comprises: a power supply unit connected with the current output unit, the power supply unit being configured to provide working power for the current output unit.

6. The control circuit of the cosmetic apparatus according to claim 4, wherein The current output unit comprises a first bridge branch and a second bridge branch; The first bridge branch is configured with a first voltage end, a first controlled end, a second controlled end and a first loop end; and the second bridge branch is configured with a second voltage end, a third controlled end, a fourth controlled end and a second loop end; The first voltage end and the second voltage end are connected to form a first node for inputting working power; The first controlled end and the fourth controlled end are configured to input a first PWM signal provided by the control unit, and the second controlled end and the third controlled end are configured to input a second PWM signal provided by the control unit. The first loop end and the second loop end are connected to form a second node as the loop node.

7. The control circuit of the cosmetic apparatus according to claim 4, wherein The detection unit comprises a sampling branch. The sampling end of the sampling branch is connected to the loop node, and the output end of the sampling branch is connected to the control unit. The sampling branch is configured to sample a voltage of the loop node and output a sampled voltage value; or The detection unit comprises a sampling branch and a comparison branch. The sampling end of the sampling branch is connected to the loop node, and the output end of the sampling branch is connected to the comparison branch. The sampling branch is configured to sample a voltage of the loop node and output a sampled voltage value. The comparison branch is connected to the control unit, and the comparison branch is configured to compare the sampled voltage value with a threshold value and output the contact detection electrical signal according to a comparison result.

8. The control circuit of a cosmetic device according to claim 7, characterized in that, The sampling branch comprises a first sampling resistor, a second sampling resistor, a diode, and an RC filter branch. The first end of the first sampling resistor serves as the sampling end, the second end of the first sampling resistor is connected to the first end of the second sampling resistor to form a first output node, the second end of the second sampling resistor is grounded, the first output node is connected to the first end of the RC filter branch, the second end of the RC filter branch serves as the output end of the sampling branch, the cathode end of the diode is connected to the output end of the sampling branch, and the anode end of the diode is grounded.

9. The control circuit of a cosmetic device according to claim 8, characterized in that, The comparison branch comprises a comparator. The inverting input end of the comparator is configured to input a preset reference voltage, the non-inverting input end of the comparator is configured to be connected to the output end of the sampling branch, and the output end of the comparator serves as the output end of the comparison branch.

10. The control circuit of the cosmetic apparatus according to claim 2, wherein The movement detection unit comprises: an accelerometer connected to the control unit, the accelerometer being configured to detect an acceleration component of the beauty instrument as the movement detection electrical signal; and / or a gyroscope connected to the control unit, the gyroscope being configured to detect angle change information of the beauty instrument as the movement detection electrical signal.

11. A cosmetic device, characterized by, A control circuit of the beauty instrument according to any one of claims 1 to 10.

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