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 control unit, a power supply unit, a first power supply branch, a second power supply branch, an inversion unit and an ultrasonic transducer. The power supply unit is used for processing electric energy provided by the power supply and outputting first direct current. The first power supply branch and the second power supply branch are respectively connected with the power supply unit, so that the first power supply branch supplies power to the control unit, and the second power supply branch outputs target voltage to the inversion unit. And outputting alternating current according to the target voltage by using the inversion unit. Therefore, under the condition that the first direct current is provided, small direct current can be output to supply power to the control unit, alternating current can be provided for the ultrasonic transducer, various and multi-path power utilization requirements can be met at the same time, and a new scheme capable of meeting different power utilization requirements is provided for the beauty instrument.

Description

Technical Field

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

[0002] As people's demand for skin care grows, users are also demanding more and more functional beauty devices. Existing beauty devices can be differentiated by the physical energy they use to act on the skin. For example, there are light-transmitting beauty devices that output light energy, and electrode-type beauty devices that output microcurrent. Currently, some related beauty device solutions can trigger light energy, microcurrent, and even ultrasonic energy to act on the skin. Based on this, in order for beauty devices to output ultrasonic energy, they must provide an appropriate AC power supply to the ultrasonic transducer.

[0003] However, since the other power-consuming units in the beauty device all use direct current (DC), which is different from the alternating current (AC) used by the ultrasonic transducer, meeting the varying power requirements of the different units in the beauty device is an urgent issue. Utility Model Content

[0004] The purpose of this application is to provide a beauty instrument and its control circuit, providing a new solution that can meet different power requirements.

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

[0006] control unit;

[0007] a power supply unit, configured to be connected to a power source and output a first direct current based on power provided by the power source;

[0008] a first power supply branch connected to the power supply unit and the control unit, respectively, the first power supply branch being configured to supply power to the control unit according to the first direct current; wherein a voltage supplied to the control unit is lower than a voltage of the first direct current;

[0009] a second power supply branch, connected to the power supply unit and the control unit respectively, and configured to step down the first DC power and output a target voltage;

[0010] an inverter unit connected to the second power supply branch, and configured to output corresponding alternating current according to a target voltage;

[0011] The ultrasonic transducer is connected to the inverter unit, and the ultrasonic transducer is used to work according to alternating current.

[0012] In one possible implementation, the control circuit further includes:

[0013] A driving unit connected to the control unit, the driving unit is used to be controlled by the control unit and drive the ultrasonic transducer to move;

[0014] The third power supply branch is connected to the power supply unit and the drive unit respectively, and is used to supply power to the drive unit according to the first direct current; the voltage supplied to the drive unit is lower than the voltage of the first direct current.

[0015] In one possible implementation, the driving unit includes a first motor and a second motor;

[0016] The first motor is connected to the third power supply branch and is in transmission connection with the ultrasonic transducer, and the first motor is used to drive the ultrasonic transducer to move in a first manner;

[0017] The second motor is connected to the third power supply branch and is transmission-connected to the ultrasonic transducer. The second motor is used to drive the ultrasonic transducer to move in a second manner.

[0018] In one possible implementation, the third power supply branch includes:

[0019] A voltage conversion unit is connected to the power supply unit, and the voltage conversion unit includes a first power supply end;

[0020] The filter unit is connected to the first power supply end of the voltage conversion unit, and the output end of the filter unit is used to connect the power input end of the first motor and the power input end of the second motor.

[0021] In one possible implementation, the voltage conversion unit includes at least a first conversion chip;

[0022] The filtering unit at least includes a first inductor and a first capacitor;

[0023] The input end of the first conversion chip is connected to the power supply unit, the output end of the first conversion chip is connected to the first end of the first inductor, the second end of the first inductor is connected to the first end of the first capacitor to form a voltage output node, which serves as the output end of the filtering unit, and the second end of the first capacitor is grounded.

[0024] In one possible implementation, the first power supply branch includes:

[0025] a first step-down unit connected to the power supply unit, configured to output a second direct current according to the first direct current; the voltage of the second direct current being lower than the voltage of the first direct current;

[0026] The second step-down unit is connected between the first step-down unit and the control unit. The second step-down unit is used to output a third DC power according to the second DC power as working power for the control unit. The voltage of the third DC power is lower than the voltage of the second DC power.

[0027] In one possible implementation, the first step-down unit includes at least a second conversion chip, a second inductor, and a second capacitor;

[0028] An input end of the second conversion chip is connected to the power supply unit, an output end of the second conversion chip is connected to a first end of a second inductor, a second end of the second inductor is connected to a first end of a second capacitor to form a first node, and a second end of the first capacitor is grounded;

[0029] The second step-down unit at least includes a third conversion chip and a third capacitor;

[0030] The input end of the third conversion chip is connected to the first node, the output end of the third conversion chip is connected to the first end of the third capacitor to form a second node, the second node is used to connect to the control unit, and the second end of the third capacitor is grounded.

[0031] In one possible implementation, the second power supply branch includes a voltage regulating unit, which includes a voltage output terminal; the inverter unit includes a transformer;

[0032] The middle tap of the primary coil of the transformer is connected to the voltage output terminal of the voltage regulating unit;

[0033] The voltage regulating unit is controlled by the control unit, and is used for outputting a target voltage to the inverter unit according to the first direct current.

[0034] In one possible implementation, the inverter unit includes a push-pull inverter circuit, a full-bridge inverter circuit, or a half-bridge inverter circuit.

[0035] In one possible implementation, the control circuit further includes: a matching unit connected between the inverter unit and the ultrasonic transducer.

[0036] In a possible implementation, the control circuit further includes: a first sampling unit connected to the second power supply branch.

[0037] In one possible implementation, the control circuit further includes: a second sampling unit connected between the inversion unit and the ultrasonic transducer.

[0038] In a possible implementation, the control circuit further includes: a third sampling unit connected to the third power supply branch.

[0039] A second aspect of an embodiment of the present application provides a beauty instrument, comprising a control circuit of a beauty instrument provided by the first aspect above.

[0040] Compared with the prior art, the present invention has the following advantages: The control circuit of the beauty instrument includes a control unit, a power supply unit, a first power supply branch, a second power supply branch, an inverter unit, and an ultrasonic transducer. The power supply unit is connected to a power supply to output a first direct current based on the power provided by the power supply. The first power supply branch and the second power supply branch are respectively connected to the power supply unit, and the first power supply branch supplies power to the control unit based on the first direct current. By connecting the control unit to the second power supply unit, the control unit can control the voltage reduction of the second power supply unit. That is, the control unit controls the second power supply unit to reduce the voltage of the first direct current and output a target voltage. Since the inverter unit is connected to the second power supply branch and is also connected to the ultrasonic transducer, the inverter unit can output a corresponding alternating current based on the target voltage as the operating power for the ultrasonic transducer, allowing the ultrasonic transducer to operate based on the alternating current and thereby output ultrasonic energy. In the above solution, the power supply unit processes the power provided by the power supply and outputs the first direct current. By connecting the first and second power supply branches to the power supply unit, the first power supply branch supplies power to the control unit, while the second power supply branch outputs a target voltage to the inverter unit. The inverter unit then outputs AC power according to the target voltage. This allows the device to simultaneously supply both the first DC power and a smaller DC power source to power the control unit and AC power to the ultrasonic transducer, meeting multiple power requirements simultaneously and providing a new solution for beauty devices that can meet diverse power needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of the structure of the control circuit of the beauty instrument provided in an embodiment of the present application;

[0042] Figure 2 A schematic structural diagram of a control circuit of a beauty instrument provided in another embodiment of the present application;

[0043] Figure 3 This is a schematic diagram of the specific structure of the third power supply branch and the drive unit in the embodiment of the present application;

[0044] Figure 4 This is a specific circuit diagram of the third power supply branch in an embodiment of the present application;

[0045] Figure 5 This is a schematic diagram of the specific structure of the first power supply branch in an embodiment of the present application;

[0046] Figure 6 This is a specific circuit diagram of the first power supply branch in an embodiment of the present application;

[0047] Figure 7 Schematic diagram of the specific structure of the second power supply branch and the inverter unit in the embodiment of the present application;

[0048] Figure 8 A schematic structural diagram of a control circuit of a beauty instrument provided in yet another embodiment of the present application;

[0049] Figure 9 A schematic structural diagram of a control circuit of a beauty instrument provided in yet another embodiment of the present application;

[0050] Figure 10 A schematic structural diagram of a control circuit of a beauty instrument provided in another embodiment of the present application;

[0051] Figure 11 This is a schematic diagram of a specific circuit of the inverter unit and the matching unit in the embodiment of the present application;

[0052] Figure 12 The specific circuit diagram of the sampling unit in the embodiment of the present application is as follows Figure 1 ;

[0053] Figure 13 The specific circuit diagram of the sampling unit in the embodiment of the present application is as follows Figure 2 ;

[0054] Figure 14 A schematic diagram of the structure of the beauty instrument provided in an embodiment of the present application;

[0055] Figure 15 This is a schematic cross-sectional view of the length direction of the beauty instrument provided in an embodiment of the present application. DETAILED DESCRIPTION

[0056] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0057] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may 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 may be directly connected to the other element or indirectly connected to the other element.

[0058] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this 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 cannot be understood as a limitation on this application.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0060] As people's demand for skin care grows, users are also demanding more and more functional beauty devices. Existing beauty devices can be differentiated by the physical energy they use to act on the skin. For example, there are light-transmitting beauty devices that output light energy, and electrode-type beauty devices that output microcurrent. Currently, some related beauty device solutions can trigger light energy, microcurrent, and even ultrasonic energy to act on the skin. Based on this, in order for beauty devices to output ultrasonic energy, they must provide an appropriate AC power supply to the ultrasonic transducer.

[0061] However, since the other power-consuming units in the beauty device all use direct current (DC), which is different from the alternating current (AC) used by the ultrasonic transducer, meeting the varying power requirements of the different units in the beauty device is an urgent issue.

[0062] In order to solve the above technical problems, an embodiment of the present application provides a beauty instrument and a control circuit thereof. The control circuit of the beauty instrument includes: a control unit, a power supply unit, a first power supply branch, a second power supply branch, an inverter unit, and an ultrasonic transducer. By connecting the power supply to the power supply, a first direct current can be output based on the electric energy provided by the power supply. The first power supply branch and the second power supply branch are respectively connected to the power supply unit, and the first power supply branch is used to supply power to the control unit according to the first direct current. By connecting the control unit to the second power supply unit, the control unit can perform voltage reduction control on the second power supply unit. That is, the second power supply unit is controlled by the control unit to reduce the voltage of the first direct current and output the target voltage. Since the inverter unit is connected to the second power supply branch, and the inverter unit is also connected to the ultrasonic transducer, the inverter unit can output corresponding alternating current according to the target voltage as the working power of the ultrasonic transducer, so that the ultrasonic transducer can work according to the alternating current and output ultrasonic energy.

[0063] In the above solution, the power supply unit processes the electrical energy provided by the power supply and outputs a first direct current. By connecting the first and second power supply branches to the power supply unit, respectively, the first power supply branch supplies power to the control unit, and the second power supply branch outputs a target voltage to the inverter unit. The inverter unit then outputs alternating current according to the target voltage. This allows, while providing the first direct current, to output a smaller direct current to power the control unit and also provide alternating current to the ultrasonic transducer. This allows for simultaneous satisfaction of multiple power requirements and provides a new solution for beauty devices that can meet diverse power needs.

[0064] See Figure 1 , Figure 1 The following is a schematic diagram showing the structure of a control circuit of a beauty instrument provided by an embodiment of the present application. For ease of explanation, only the parts related to this embodiment are shown, which are described in detail as follows:

[0065] exist Figure 2 In the embodiment, the control circuit 100 of the beauty instrument includes: a control unit 10, a power supply unit 20, a first power supply branch 30, a second power supply branch 40, an inverter unit 50 and an ultrasonic transducer 60. Specifically:

[0066] The power supply unit 20 is connected to the power supply 200 and outputs a first direct current based on the power provided by the power supply. The first power supply branch 30 is connected to the power supply unit 20 and the control unit 10, respectively. The first power supply branch 30 is used to supply power to the control unit 10 based on the first direct current. The voltage supplied to the control unit 10 is lower than the voltage of the first direct current. The second power supply branch 40 is connected to the power supply unit 20 and the control unit 10, respectively, and is used to step down the first direct current and output a target voltage. The inverter unit 50 is connected to the second power supply branch 40. The inverter unit 50 is used to output a corresponding alternating current based on the target voltage. The ultrasonic transducer 60 is connected to the inverter unit 50. The ultrasonic transducer 60 is used to operate based on the alternating current.

[0067] In this embodiment, the power supply unit 20 is connected to the power source 200 to convert the electrical energy provided by the unit 110 into a first direct current. Here, the power source 200 can be a battery included in the beauty instrument or an external power source connected to the beauty instrument, such as mains electricity. The first direct current generally refers to the power required for normal operation of the control circuit 100 of the beauty instrument.

[0068] As an example, in a specific implementation, the power supply unit 20 may include at least a voltage conversion circuit. For example, if the power supply 200 is a battery in a beauty device, the power provided by the battery is direct current (DC). Based on this, the voltage conversion circuit in the power supply unit 20 can perform voltage conversion, such as stepping up or stepping down, on the DC power provided by the battery to generate the first DC power.

[0069] As another example, in a specific implementation, power supply unit 20 may include at least a rectifier circuit. For example, when power supply 200 is powered by mains electricity, the power provided by power supply 200 is AC power. Based on this, power supply unit 20 may use the rectifying circuit to rectify the AC power to obtain the first DC power.

[0070] Based on the above example, in a specific implementation, the power supply unit 20 may include a rectifier circuit and a voltage conversion circuit. For example, if the power source 200 is AC power, the power supply unit 20 may use the rectifier circuit to convert the AC power output from the AC power into DC power, then use the voltage conversion circuit to convert the DC power into a voltage, and then output the first DC power to the first power supply branch 30 and the second power supply branch 40, respectively.

[0071] In a specific implementation, the control unit 10 can specifically be a control unit of a beauty instrument, such as a controller, processor, etc. in a beauty instrument. That is, the actual operating voltage of the control unit 10 is relatively small compared to the voltage of the first direct current. Based on this, in all embodiments of the present application, a first power supply branch 30 is connected between the power supply unit 20 and the control unit 10, so that the first direct current output by the power supply unit 20 can be transmitted to the first power supply branch 30, and then the first direct current is processed by the first power supply branch 30 to supply power to the control unit 10. Here, the voltage supplied to the control unit 10 is lower than the voltage of the first direct current. That is, the voltage input to the first power supply branch 30 is greater than the voltage output by the first power supply branch 30.

[0072] In a specific implementation, the first power supply branch 30 processes the first DC power, which at least includes stepping down the voltage of the first DC power. It may also include filtering the first DC power, or filtering the stepped-down first DC power. In practical applications, the voltage output by the first power supply branch 30 can also be used as operating power for other specific electronic components in the control circuit 100 of the beauty instrument. Based on this, the DC power output by the first power supply branch 30 can be converted into low-voltage DC power to power various components in the circuit. For example, the voltage of the first DC power can be 12V, and the first power supply branch 30 can step down the first DC power to obtain a DC power of 5.5V to 3.3V to power the control unit 10.

[0073] It is easy to understand that since the control unit 10 is also connected to the second power supply branch 40 and the inverter unit 50, the control unit 10 can enter the operating state after receiving power from the first power supply branch 30, thereby controlling the operation of the second power supply branch 40 and / or the inverter unit 50. Since the DC power output by the first power supply branch 30 is low-voltage DC power, and this low-voltage DC power is used to power the control unit 10, in order to ensure its power supply stability, the DC power output by the first power supply branch 30 is not used for inverter processing.

[0074] In this embodiment, the second power supply branch 40 is connected between the power supply unit 20 and the inverter unit 50 and is controlled by the control unit 10. The first DC power output by the power supply unit 20 serves as input power for the second power supply branch 40. The second power supply branch 40 steps down the first DC power to obtain a target voltage suitable for the inverter unit 50. Here, the target voltage output by the second power supply branch 40 is greater than the voltage provided by the first power supply branch 30.

[0075] It should be noted that the target voltage output by the second power supply branch 40 generally refers to the voltage provided to the inverter unit 50 by the second power supply branch 40. When a higher-voltage AC power output by the inverter unit 50 is required, the AC power voltage can be controlled by controlling the target voltage output by the second power supply branch 40.

[0076] In a specific implementation, the second power supply branch 40 may include a voltage conversion circuit, and the control unit 10 may output a voltage control signal to the second power supply branch 40, thereby controlling the extent to which the second power supply branch 40 reduces the voltage of the first DC power. For example, if the first DC power voltage is 12V, the control unit 10 may control the target voltage output by the second power supply branch 40 to be within a range of 6V to 11V by outputting a voltage control signal to the second power supply branch 40. In other words, the second power supply branch 40 may reduce the voltage of the first DC power to output a target voltage of 6V, 7V, 8V, 9V, 10V, or 11V.

[0077] In this embodiment, the inverter unit 50 is connected between the second power supply branch 40 and the ultrasonic transducer 60 and is controlled by the control unit 10. The inverter unit 50 inverts the target voltage provided by the second power supply branch 40 and outputs a corresponding alternating current. This alternating current activates the ultrasonic transducer 60, thereby outputting the corresponding ultrasonic energy.

[0078] It should be noted that the AC power output by the inverter unit 50 can be AC ​​power with adjustable frequency and voltage. When the inverter unit 50 is required to output AC power with a higher frequency, the control unit 10 can output a corresponding inverter control signal to the inverter unit 50 to control the AC power frequency.

[0079] As an embodiment, the inverter unit 50 may include an inverter circuit, such as a push-pull inverter circuit, a full-bridge inverter circuit, or a half-bridge inverter circuit. In a specific implementation, the control unit 10 may output an inverter control signal to the inverter circuit to control the on / off frequency of the switches in the inverter circuit, thereby controlling the frequency of the AC power.

[0080] It can be understood that, in a specific implementation, the inverter unit 50 includes an inverter circuit, which can be specifically constructed by a number of switching tubes and a transformer, such as a push-pull inverter circuit, a full-bridge inverter circuit or a half-bridge inverter circuit, so it will not be repeated here.

[0081] In the above solution, the power supply unit processes the electrical energy provided by the power supply and outputs a first direct current. By connecting the first and second power supply branches to the power supply unit, respectively, the first power supply branch supplies power to the control unit, and the second power supply branch outputs a target voltage to the inverter unit. The inverter unit then outputs alternating current according to the target voltage. This allows, while providing the first direct current, to output a smaller direct current to power the control unit and also provide alternating current to the ultrasonic transducer. This allows for simultaneous satisfaction of multiple power requirements and provides a new solution for beauty devices that can meet diverse power needs.

[0082] Figure 2 FIG. 1 shows a schematic diagram of a control circuit of a beauty instrument provided by another embodiment of the present invention. As an embodiment, Figure 1 The difference is that Figure 2 The control circuit 100 of the beauty instrument shown further includes a driving unit 70 and a third power supply branch 80. Specifically:

[0083] The driving unit 70 is connected to the control unit 10 . The driving unit 70 is configured to be controlled by the control unit 10 and drive the ultrasonic transducer 60 to move.

[0084] The third power supply branch 80 is connected to the power supply unit 20 and the drive unit 70 respectively, and is used to supply power to the drive unit 70 according to the first DC power. The voltage supplied by the third power supply branch 80 to the drive unit 70 is lower than the voltage of the first DC power.

[0085] In this embodiment, the drive unit 70 is controlled by the control unit 10. That is, the control unit 10 can drive the drive unit 70 to operate, causing the drive unit 70 to drive the ultrasonic transducer 60 to move. Here, the drive unit 70 drives the ultrasonic transducer 60 to move, specifically driving the ultrasonic transducer 60 to move within a movable range. For example, the ultrasonic transducer 60 can be driven to move in a horizontal plane or to reciprocate in a certain direction.

[0086] It is easy to understand that the inverter unit 50 inverts the target voltage provided by the second power supply branch 40 and outputs corresponding alternating current. This alternating current is used to power the ultrasonic transducer 60, thereby outputting corresponding ultrasonic energy. To prevent the ultrasonic transducer 60 from operating in an optimal state or at an optimal operating frequency due to the reuse of this alternating current, this embodiment adds a third power supply branch 80 connected to the power supply unit 20. This third power supply branch 80 is used to power the drive unit 70 based on the first direct current. This ensures the normal power supply of other branches and improves the stability of the power supply to the drive unit 70.

[0087] Figure 3 FIG. 1 shows a schematic diagram of the specific structure of the third power supply branch and the drive unit in the embodiment of the present application. As an embodiment, Figure 3 In the embodiment, the driving unit 70 includes a first motor 71 and a second motor 72. Figure 2 and Figure 3 Specifically:

[0088] The first motor 71 is connected to the third power supply branch 80 and is in transmission connection with the ultrasonic transducer 60. The first motor 71 is used to drive the ultrasonic transducer 60 to move in a first manner. The second motor 72 is connected to the third power supply branch 80 and is in transmission connection with the ultrasonic transducer 60. The second motor 72 is used to drive the ultrasonic transducer 60 to move in a second manner.

[0089] In this embodiment, the first motor 71 and the second motor 72 are both in transmission connection with the ultrasonic transducer 60. For example, the first motor 71 and / or the second motor 72 are in transmission connection with the ultrasonic transducer 60 via a transmission member.

[0090] Figure 15 Schematic diagram of the cross section of the beauty instrument provided in the embodiment of the present application in the longitudinal direction. Figure 15 Taking the schematic diagram shown as an example, in the control circuit 100 of the beauty instrument provided in the embodiment of the present application, the specific electronic components can be set on the circuit board 110. The first motor 71 and the second motor 72 in the driving unit 70 can be connected to the circuit board 110 through a connection line.

[0091] For example, Figure 15 The beauty device shown is an example. In a specific implementation, the beauty device further comprises an active surface 301, a dielectric cavity 302, and a sound outlet region 303 disposed on the active surface 301 and corresponding to the dielectric cavity 302. A solution is disposed within the dielectric cavity 302, and an ultrasonic transducer 60 is movably disposed within the dielectric cavity 302. The ultrasonic focus of the ultrasonic transducer 60 passes through the sound outlet region 303 for irradiation into the skin to be treated. Thus, by driving the ultrasonic transducer 60 to move within the dielectric cavity 302, the active depth and / or the planar active position can be adjusted.

[0092] Optionally, the beauty instrument further includes a first motor 71 and a transmission member 305 in transmission connection with the first motor 71. In actual implementation, the first motor 71 can also be replaced with a hydraulic pump or a pneumatic pump. In some embodiments, the first motor 71 can be disposed outside the dielectric cavity 302, with one end of the transmission member 305 extending into the dielectric cavity 302 to be in transmission connection with the ultrasonic transducer 60, thereby driving the ultrasonic transducer 60.

[0093] The second motor 72 may be disposed in the dielectric cavity 302 to drive the ultrasonic transducer 60 to move.

[0094] It should be noted that, in other embodiments, only the first motor 71 or the second motor 72 may be provided. In some embodiments, the ultrasonic transducer 60 may also be fixedly installed in the beauty instrument.

[0095] In this embodiment, a first motor 71 and a second motor 72 can be provided simultaneously to respectively drive different movements of the ultrasonic transducer 60. For example, the first motor 71 can drive the ultrasonic transducer 60 to move in a first manner to move the ultrasonic focus of the ultrasonic transducer 60 within a plane, thereby achieving adjustable planar action position. The second motor 72 can drive the ultrasonic transducer 60 to move in a second manner (e.g., moving away from or toward the sound output area 303), thereby moving the ultrasonic focus of the ultrasonic transducer 60 in the direction of the action depth, thereby achieving adjustable action depth.

[0096] like Figure 3 As shown, as an embodiment, the third power supply branch 80 includes: a voltage conversion unit 81 and a filtering unit 82. Specifically:

[0097] The voltage conversion unit 81 is connected to the power supply unit 20. The voltage conversion unit 81 includes a first power supply terminal 811. The filter unit 82 is connected to the first power supply terminal 811 of the voltage conversion unit 81. The output terminal 821 of the filter unit 82 is used to connect the power input terminal of the first motor 71 and the power input terminal of the second motor 72.

[0098] In this embodiment, the voltage conversion unit 81 is used to reduce the voltage of the first DC power. The filtering unit 82 is used to filter the reduced DC power and use the filtered DC power as the operating power for the drive unit 70. Here, the voltage of the filtered DC power is lower than the voltage of the first DC power.

[0099] In practice, using the third power supply branch 80 to power the first and second motors 71 and 72 avoids sharing the same power supply branch with other power-consuming units or components in the control circuit 100, thereby improving the overall power supply stability of the circuit. Using the first and second motors 71 and 72 to drive the ultrasonic transducer 60 makes the range of ultrasonic energy more flexible and controllable, allowing users to achieve appropriate skin care effects without relying too much on manual movements when using the beauty device.

[0100] Figure 4 FIG. 8 is a schematic diagram of a specific circuit of the third power supply branch in an embodiment of the present application. As an embodiment, the voltage conversion unit 81 includes at least a first conversion chip U1. The filtering unit 82 includes at least a first inductor L1 and a first capacitor C1.

[0101] Combine Figure 2 、 Figure 3 as well as Figure 4 The input terminal V_IN1 of the first conversion chip U1 is connected to the power supply unit 20, the output terminal V_OUT1 of the first conversion chip U1 is connected to the first end of the first inductor L1, the second end of the first inductor L1 is connected to the first end of the first capacitor C1 to form a voltage output node, which serves as the output terminal 821 of the filtering unit, and the second end of the first capacitor C1 is grounded.

[0102] It is easy to understand that in this embodiment, the first conversion chip U1 can specifically be a DC-DC conversion chip. After the first DC power output by the power supply unit 20 undergoes voltage conversion via the first conversion chip U1, the LC circuit composed of the first inductor L1 and the first capacitor C1 is used to filter the first DC power after voltage conversion. Taking the first DC power as a 12V DC power as an example, the first DC power can be stepped down by the first conversion chip U1. For example, the first DC power of 12V can be stepped down by the first conversion chip U1 to obtain 5V DC power. The 5V DC power is then filtered using the LC circuit to obtain a purer 5V DC power for use by the first motor 71 and the second motor 72.

[0103] Figure 5 FIG. 1 shows a schematic diagram of the specific structure of the first power supply branch in an embodiment of the present application. Figure 5 As shown in FIG. 1 , as an embodiment, the first power supply branch 30 includes: a first step-down unit 31 and a second step-down unit 32. Figure 1 、 Figure 2 as well as Figure 5 The first step-down unit 31 is connected to the power supply unit 20 , and the second step-down unit 32 is connected between the first step-down unit 31 and the control unit 10 .

[0104] In this embodiment, the first step-down unit 31 is configured to output a second DC power from the first DC power. Here, the voltage of the second DC power is lower than the voltage of the first DC power. The second step-down unit 32 is configured to output a third DC power from the second DC power, which serves as operating power for the control unit 10. Here, the voltage of the third DC power is lower than the voltage of the second DC power.

[0105] For example, taking the first DC power voltage as 12V, the first step-down unit 31 receives the 12V first DC power as input, steps it down, and outputs a second DC power. The voltage of the second DC power can be 6V or 5.5V. The second step-down unit 32 receives the second DC power as input, steps it down, and outputs a third DC power. The voltage of the third DC power can be 3.3V or 3V.

[0106] It is easy to understand that, in a specific implementation, the voltage reduction unit can be implemented using an existing DC-DC voltage conversion circuit. The specific voltage reduction strategies of the first voltage reduction unit 31 and the second voltage reduction unit 32 can also be configured according to the actual power demand of the control unit 10.

[0107] Figure 6 FIG. 1 shows a specific circuit diagram of the first power supply branch in an embodiment of the present application. Figure 6 As shown, as an embodiment, the first step-down unit 31 includes at least a second conversion chip U2, a second inductor L2, and a second capacitor C2. The second step-down unit 32 includes at least a third conversion chip U3 and a third capacitor C3.

[0108] Combine Figure 5 and Figure 6 In this embodiment, the input terminal V_IN2 of the second conversion chip U2 is connected to the power supply unit 20. The output terminal V_OUT2 of the second conversion chip U2 is connected to the first end of the second inductor L2. The second end of the second inductor L2 is connected to the first end of the second capacitor C2 to form a first node P1. The second end of the second capacitor C2 is grounded. The input terminal V_IN3 of the third conversion chip U3 is connected to the first node P1. The output terminal V_OUT3 of the third conversion chip U3 is connected to the first end of the third capacitor C3 to form a second node P2. The second node P2 is used to connect to the control unit 10. The second end of the third capacitor C3 is grounded.

[0109] In this embodiment, both the second conversion chip U2 and the third conversion chip U3 can be DC-DC conversion chips. After the first DC power output by the power supply unit 20 undergoes voltage conversion via the second conversion chip U2, the LC circuit composed of the second inductor L2 and the second capacitor C2 is used to filter the first DC power after voltage conversion. Taking the first DC power of 12V as an example, the second conversion chip U2 can reduce the voltage of the first DC power. For example, the first conversion chip U1 reduces the voltage of the first DC point of 12V to obtain a DC power of 6V or 5.5V. The LC circuit is then used to filter the 6V or 5.5V DC power to obtain a purer DC power of 6V or 5.5V. Similar to the second conversion chip U2, the third conversion chip U3 further converts the 6V or 5.5V DC power to obtain a third DC power of 3.3V or 3V, which serves as the working power of the control unit 10.

[0110] It is easy to understand that the third DC power outputted from the second node P2 can also be used by other electronic devices or chips in the control circuit, thereby forming a physical distinction between the second power supply branch 40 and the third power supply branch 80 .

[0111] Figure 7 FIG. 1 shows a schematic diagram of the specific structure of the second power supply branch and the inverter unit in the embodiment of the present application. Figure 7 As shown, as an embodiment, the second power supply branch 40 includes a voltage regulating unit 41, which includes a voltage output terminal 411. The inverter unit 50 includes a transformer T1. The center tap of the primary winding of the transformer T1 is connected to the voltage output terminal 411 of the voltage regulating unit 41.

[0112] In this embodiment, the voltage regulating unit 41 is controlled by the control unit 10. The voltage regulating unit 41 is configured to output a target voltage to the inverter unit 50 according to the first direct current.

[0113] In a specific implementation, the voltage regulating unit 41 can be a voltage conversion circuit capable of outputting multiple voltages, or a voltage source capable of outputting multiple voltages based on the first DC power. Since the control unit 10 is connected to the voltage regulating unit 41 and the inverter unit 50, the control unit 10 can be used to control the voltage regulating unit 41 to output a specific target voltage. Furthermore, the control unit 10 can also output an inverter control signal to the inverter unit 50, controlling the frequency of the AC power output by the inverter unit 50 based on the target voltage.

[0114] Exemplarily, in a specific implementation, the control unit 10 can output a frequency-complementary signal pair to the inverter unit 50. For example, the control unit 10 outputs a first frequency signal and a second frequency signal to the inverter unit 50, wherein the first frequency signal and the second frequency signal are complementary in frequency, and the frequency range of the two is 3MHz to 4MHz. Here, the switch tube in the inverter unit 50 can be turned on and off under the action of the first frequency signal and the second frequency signal, and alternately turned on and off. Based on this, currents in opposite directions are alternately generated on the primary side of the transformer T1, thereby outputting corresponding alternating current through the secondary side of the transformer T1.

[0115] Figure 8 FIG. 1 shows a structural diagram of a control circuit of a beauty instrument provided in another embodiment of the present application. Figure 2 The difference between the embodiments is that Figure 8 In the example shown, the control circuit 100 of the beauty instrument further includes a matching unit 90 . The matching unit 90 is connected between the inverter unit 50 and the ultrasonic transducer 60 .

[0116] In this embodiment, the ultrasonic transducer 60 can be considered as a load, and the matching unit 90 is connected between the inverter unit 50 and the ultrasonic transducer 60 to achieve impedance matching between the inverter unit 50 and the ultrasonic transducer 60. In this way, the transmission power of the AC power output by the inverter unit 50 can be maximized, which helps to improve the energy conversion performance of the ultrasonic transducer 60.

[0117] In a specific implementation, the matching unit 90 may be an LC circuit composed of an inductor and a capacitor. Figure 11 As shown, the matching unit 90 includes at least an inductor L11 and a capacitor C11. The first end of the inductor L11 is connected to the first end of the secondary coil of the transformer T1, and the second end of the inductor L11 is connected to the first end of the capacitor C11 to form a node P3. The second end of the capacitor C11 is connected to the second end of the secondary coil of the transformer T1 to form a node P4. The ultrasonic transducer 60 is connected to the matching unit 90 via nodes P3 and P4.

[0118] For example, Figure 11 The specific circuit diagram of the inverter unit and the matching unit is shown. Figure 7 and Figure 11 , the inverter unit 50 specifically includes a push-pull inverter circuit. Figure 11 As shown, the push-pull inverter circuit includes a first drive branch, a second drive branch and a transformer T1. Here, the first drive branch and the second drive branch can be drive branches with the same structure. Figure 11In the embodiment, the driving branch includes a switch Q1, a capacitor C21, and a resistor R11. The controlled terminal of the switch Q1 is used to input a frequency signal, the high-potential terminal of the switch Q1 is used to connect to the primary winding of the transformer T1, and the low-potential terminal of the switch Q1 is grounded. Specifically, in the first driving branch, the controlled terminal of the switch Q1 is used to input a first frequency signal, and the high-potential terminal of the switch Q1 is connected to the first terminal of the primary winding of the transformer T1. The capacitor C21 and the resistor R11 are connected in series, respectively, between the high-potential terminal and the low-potential terminal of the switch Q1. In the second driving branch, the controlled terminal of the switch Q1 is used to input a second frequency signal, and the high-potential terminal of the switch Q1 is connected to the second terminal of the primary winding of the transformer T1. The capacitor C21 and the resistor R11 are connected in series, respectively, between the high-potential terminal and the low-potential terminal of the switch Q1.

[0119] In all embodiments of the present application, a sampling unit may be further configured in the control circuit 100 of the beauty instrument to sample electrical signals from each power supply branch or power transmission branch. The sampled data is then sent to the control unit, which adaptively adjusts its output control signal based on the sampling results.

[0120] For example, the sampling circuit may sample the electrical signal of the second power supply branch, and the control unit may adjust the magnitude of the target voltage output by the second power supply branch according to the sampling result.

[0121] For another example, the sampling circuit can sample the electrical signal of the inverter unit, and the control unit can adjust the frequency of the AC power output by the inverter unit according to the sampling result.

[0122] Figure 9 FIG. 1 shows a structural diagram of a control circuit of a beauty instrument provided in another embodiment of the present application. Figure 2 The difference between the embodiments is that Figure 9 In the illustrated example, the beauty instrument's control circuit 100 further includes a first sampling unit 101. As an embodiment, the first sampling unit 101 is connected to the second power supply branch 40. Since the second power supply branch 40 is used to step down the first DC power to output a target voltage, the first sampling unit 101 can be used to sample the target voltage and transmit the sampling results to the control unit 10. Accordingly, the control unit 10 can adjust the target voltage based on the sampling results.

[0123] like Figure 9As shown, as an embodiment, the second sampling unit 102 is connected between the inverter unit 50 and the ultrasonic transducer 60. Here, the inverter unit 50 outputs alternating current to the ultrasonic transducer 60, causing the ultrasonic transducer 60 to operate and output ultrasonic energy. Accordingly, the second sampling unit 102 can sample the alternating current output by the inverter unit 50 and send the sampling results to the control unit 10. Accordingly, the control unit 10 can adjust the driving frequency of the inverter unit 50 based on the sampling results. For example, the frequencies of the first and second frequency signals can be adjusted.

[0124] like Figure 9 As shown, as an embodiment, the third sampling unit 103 is connected to the third power supply branch 80. Here, the third power supply branch 80 is used to supply power to the drive unit 70 based on the first direct current. Accordingly, the third sampling unit 103 can sample the operating power consumption of the drive unit 70 and send the sampling results to the control unit 10. Accordingly, the control unit 10 can determine whether the drive unit 70 has failed based on the sampling results. For example, if the sampled current is large, such as greater than a current threshold, it can be determined that the motor in the drive unit 70 has failed.

[0125] Figure 10 FIG. 1 shows a structural diagram of a control circuit of a beauty instrument provided by another embodiment of the present application. Figure 9 The difference between the embodiments is that Figure 10 In the example shown, the control circuit 100 of the beauty instrument further includes a matching unit 90. Accordingly, the second sampling unit 102 can be connected to the matching unit 90. That is, the electrical signal of a node in the matching unit 90 is used as a parameter representing the alternating current.

[0126] In a specific implementation, the first sampling unit 101 , the second sampling unit 102 and the third sampling unit 103 may be implemented using the same sampling circuit.

[0127] Figure 12 The specific circuit diagram of the sampling unit in the embodiment of the present application is shown Figure 1 .like Figure 12 As shown, the sampling circuit includes: a first sampling resistor R1, a second sampling resistor R2, a third sampling resistor R3, a first sampling capacitor C5, an operational amplifier U4 and an output resistor Rout.

[0128] Combine Figure 9 、 Figure 10 as well as Figure 12 The first end of the first sampling resistor R1 is connected to the first end of the third sampling resistor R3 to form a first sampling node, which can be used as a sampling terminal PX to connect to a sampled unit, such as the second power supply branch 40, the third power supply branch 80, the inverter unit 50, or the matching unit 90.

[0129] exist Figure 12 In the embodiment, the second end of the first sampling resistor R1 is connected to the first end of the second sampling resistor R2, the second end of the second sampling resistor R2 is connected to the first end of the first sampling capacitor C5, and the second end of the third sampling resistor R3 and the second end of the first sampling capacitor C5 are connected to an operational amplifier U4. The negative input terminal IN- of the operational amplifier U4 is connected to the second end of the first sampling capacitor C5, and the positive input terminal IN+ of the operational amplifier U4 is connected to the first end of the first sampling capacitor C5. The output terminal OUT of the operational amplifier U4 is connected to the first end of the output resistor Rout, and the second end of the output resistor Rout is connected to the control unit 10.

[0130] It will be readily understood that in this embodiment, the sampling resistor and the sampling capacitor can be used to sample the electrical signal of the sampled unit, and the operational amplifier can be used to measure and calculate the sampled content. For example, if the sampled electrical signal is a voltage, the operational amplifier can calculate it to obtain the corresponding sampled current. Based on this, the sampled current is sent to the control unit, allowing the control unit to perform corresponding adjustments and controls based on the sampled current.

[0131] Figure 13 The specific circuit diagram of the sampling unit in the embodiment of the present application is shown Figure 2 .like Figure 13 As shown, the sampling circuit includes: a first diode D1, a fourth sampling resistor R4, a fifth sampling resistor R5, a second sampling capacitor C6 and a third sampling capacitor C7.

[0132] Combine Figure 9 、 Figure 10 as well as Figure 13 The anode end of the first diode D1 serves as the sampling end PX, which is used to connect to the sampled unit, such as the second power supply branch 40 , the third power supply branch 80 , the inverter unit 50 or the matching unit 90 .

[0133] exist Figure 13 In the circuit, the cathode terminal of the first diode D1 is connected to the first end of the fourth sampling resistor R4. The second end of the fourth sampling resistor R4 and the first end of the fifth sampling resistor R5 are connected to the first end of the second sampling capacitor C6. The second end of the fifth sampling resistor R5 is connected to the first end of the third sampling capacitor C7. The feedback node formed is used to connect to the control unit 10. The second ends of the second sampling capacitor C6 and the third sampling capacitor C7 are commonly grounded. Here, the sampling circuit can collect the sampled current of the sampled unit. Based on this, the sampled current is sent to the control unit, which can facilitate the control unit to perform corresponding adjustments and controls based on the sampled current.

[0134] For example, combined Figure 7 、 Figure 12 as well as Figure 13 When sampling the electrical signal of the second power supply branch 40 , the sampling terminal PX in the sampling circuit can be connected to the voltage output terminal 411 of the voltage regulating unit 41 in the second power supply branch 40 .

[0135] For example, combined Figure 4 、 Figure 12 as well as Figure 13 When sampling the electrical signal of the third power supply branch 80 , the sampling terminal PX in the sampling circuit can be connected to the output terminal 821 of the filter unit 82 in the third power supply branch 80 .

[0136] For example, combined Figure 8 、 Figure 12 as well as Figure 13 When sampling the electrical signal of the matching unit 90 , the sampling terminal PX in the sampling circuit can be connected to the node P3 in the matching unit 90 .

[0137] The above scheme uses the sampling unit to sample the second power supply branch, the third power supply branch and / or the matching unit in the control circuit of the beauty instrument, which can provide a basis for the control unit to perform adaptive adjustments according to the sampling results, which is conducive to improving the intelligence level of the beauty instrument.

[0138] Figure 14 A structural schematic diagram of a beauty instrument provided in an embodiment of the present application is shown. Figure 15 Schematic diagram of the cross section of the beauty instrument provided in the embodiment of the present application in the longitudinal direction is shown. Figure 14 As shown, the beauty instrument 300 includes the control circuit 100 of the beauty instrument provided by any embodiment of the present application.

[0139] It is easy to understand that, in a specific implementation, when a battery can be configured in the beauty instrument 300 , the power supply 200 in the above embodiment can also be included in the beauty instrument 300 .

[0140] It is understandable that in Figure 14 and Figure 15 In the embodiment shown, due to the improvements and specific implementation methods related to this application, Figures 1 to 13 The corresponding embodiments are described in detail, so they will not be described again here.

[0141] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by 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 units can be implemented in the form of hardware or in the form of software functional units.

[0142] The above-described embodiments 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, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A control circuit of a beauty instrument, characterized in that: include: control unit; a power supply unit, configured to connect to a power source and output a first direct current based on power provided by the power source; a first power supply branch, connected to the power supply unit and the control unit respectively, the first power supply branch being configured to supply power to the control unit according to the first direct current; wherein a voltage supplied to the control unit is lower than a voltage of the first direct current; a second power supply branch, connected to the power supply unit and the control unit respectively, and configured to step down the first DC power to output a target voltage; an inverter unit connected to the second power supply branch, the inverter unit being configured to output corresponding alternating current according to the target voltage; An ultrasonic transducer is connected to the inverter unit, and the ultrasonic transducer is used to work according to the alternating current.

2. The control circuit according to claim 1, wherein: The control circuit further includes: a driving unit connected to the control unit, the driving unit being configured to be controlled by the control unit and drive the ultrasonic transducer to move; A third power supply branch is connected to the power supply unit and the drive unit respectively, and the third power supply branch is used to supply power to the drive unit according to the first direct current; the voltage supplied to the drive unit is lower than the voltage of the first direct current.

3. The control circuit according to claim 2, wherein: The driving unit includes a first motor and a second motor; The first motor is connected to the third power supply branch and is in transmission connection with the ultrasonic transducer, and the first motor is used to drive the ultrasonic transducer to move in a first manner; The second motor is connected to the third power supply branch and is in transmission connection with the ultrasonic transducer. The second motor is used to drive the ultrasonic transducer to move in a second manner.

4. The control circuit according to claim 3, wherein: The third power supply branch includes: a voltage conversion unit connected to the power supply unit, wherein the voltage conversion unit includes a first power supply terminal; The filter unit is connected to the first power supply end of the voltage conversion unit, and the output end of the filter unit is used to connect the power input end of the first motor and the power input end of the second motor.

5. The control circuit according to claim 4, wherein: The voltage conversion unit includes at least a first conversion chip; The filtering unit at least includes a first inductor and a first capacitor; The input end of the first conversion chip is connected to the power supply unit, the output end of the first conversion chip is connected to the first end of the first inductor, the second end of the first inductor is connected to the first end of the first capacitor to form a voltage output node, which serves as the output end of the filtering unit, and the second end of the first capacitor is grounded.

6. The control circuit according to claim 1, wherein: The first power supply branch includes: a first step-down unit connected to the power supply unit, configured to output a second direct current according to the first direct current; the voltage of the second direct current being lower than the voltage of the first direct current; The second step-down unit is connected between the first step-down unit and the control unit. The second step-down unit is used to output a third direct current based on the second direct current as working power for the control unit. The voltage of the third direct current is lower than the voltage of the second direct current.

7. The control circuit according to claim 6, wherein: The first step-down unit at least includes a second conversion chip, a second inductor and a second capacitor; The input end of the second conversion chip is connected to the power supply unit, the output end of the second conversion chip is connected to the first end of the second inductor, the second end of the second inductor is connected to the first end of the second capacitor to form a first node, and the second end of the second capacitor is grounded; The second step-down unit at least includes a third conversion chip and a third capacitor; The input end of the third conversion chip is connected to the first node, the output end of the third conversion chip is connected to the first end of the third capacitor to form a second node, the second node is used to connect to the control unit, and the second end of the third capacitor is grounded.

8. The control circuit according to claim 1, wherein: The second power supply branch includes a voltage regulating unit, and the voltage regulating unit includes a voltage output terminal; the inverter unit includes a transformer; The middle tap of the primary coil of the transformer is connected to the voltage output end of the voltage regulating unit; The voltage regulating unit is controlled by the control unit, and is configured to output the target voltage to the inverter unit according to the first direct current.

9. The control circuit according to claim 2, wherein: The inverter unit includes: a push-pull inverter circuit, a full-bridge inverter circuit or a half-bridge inverter circuit; and / or The control circuit further includes: a matching unit connected between the inversion unit and the ultrasonic transducer; and / or a first sampling unit connected to the second power supply branch; and / or a second sampling unit connected between the inversion unit and the ultrasonic transducer; and / or The third sampling unit is connected to the third power supply branch.

10. A beauty instrument, characterized in that: A control circuit comprising the beauty instrument according to any one of claims 1 to 9.

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