JP2023522494A - ultrasonic drive circuit - Google Patents

Abstract

The ultrasonic drive circuit applied to the skin scriber disclosed in the embodiments of the present application includes a power circuit, a main control circuit electrically connected to the power circuit, and electrically connected to the main control circuit and the power circuit. a drive switch circuit connected to the power supply circuit, a voltage conversion circuit electrically connected to the power supply circuit and the drive switch circuit, and a drive signal output interface electrically connected to the voltage conversion circuit; , the main control circuit outputs a drive signal having a target frequency and a target duty ratio to the drive switch circuit, and the drive switch circuit controls the voltage conversion circuit based on the drive signal output from the main control circuit, A target drive voltage is obtained by performing voltage conversion on the power supply voltage supplied from the power supply circuit, and the voltage conversion circuit outputs the target drive voltage to the ultrasonic peeling head via the drive signal output interface, and outputs the target drive voltage to the ultrasonic peeling head. to vibrate.

Description

The present application relates to the field of ultrasound technology, and more particularly to ultrasound drive circuits.

Today, people are using devices such as skin scribers to exfoliate and lift skin. Typically, a skin scriber generally includes an ultrasonic drive circuit and an ultrasonic peeling head, and the existing ultrasonic drive circuit outputs a drive signal of a predetermined frequency to perform peeling. By driving the head to generate high-frequency vibration and adjusting the frequency of the drive signal, the intensity of vibration of the peeling head is adjusted. However, in the process of use, the vibrating skin scriber has a poor silent effect, which greatly affects the user experience.

For at least some deficiencies and shortcomings in the above related art, the embodiments of the present application propose an ultrasonic driving circuit to improve the silent effect of the skin scriber and enhance the user experience.

In one aspect, an ultrasonic drive circuit applied to a skin scriber according to an embodiment of the present application is a main control circuit comprising a power supply circuit, a microcontroller, a capacitor and a buzzer, wherein the microcontroller controls the capacitor and the microcontroller is electrically connected to a main control circuit, which is further electrically connected to the power supply circuit, and to the microcontroller and the power supply circuit. and a primary coil and a secondary coil, wherein both ends of the primary coil are electrically connected to the power supply circuit and the drive switch circuit, respectively. a voltage conversion circuit; a drive signal output interface electrically connected to the secondary coil of the voltage conversion circuit; a switch circuit electrically connected to the power supply circuit and the microcontroller; an ion motion control circuit electrically connected to a controller, the power supply circuit and the drive signal output interface, the drive switch circuit comprising a field effect transistor comprising a source electrode, a gate electrode and a drain electrode; , a first resistor, a second resistor, a third resistor, and a fourth resistor, wherein the source electrode is grounded through the first resistor, and the gate electrode is connected to the second resistor and the drain electrode is electrically connected to one end of the primary coil of the voltage conversion circuit, and the field effect transistor is further connected to a third resistor. and the field effect transistor is further electrically connected to the microcontroller via a fourth resistor and the second resistor, the microcontroller comprising: A drive signal having a target frequency and a target duty ratio is output to the field effect transistor, and the field effect transistor controls the voltage conversion circuit based on the drive signal output from the main control circuit, and the power supply circuit voltage conversion is performed on the supplied power supply voltage to obtain a target drive voltage, and the voltage conversion circuit outputs the target drive voltage to the ultrasonic peeling head of the skin scriber through the drive signal output interface, The ultrasonic peeling head is driven to vibrate, the target frequency range is 24.5 to 25.5 kHz, the target duty ratio range is 37% ± 2%, and the target drive voltage The range is 2.7-4.2V.

In another aspect, an ultrasonic driving circuit applied to a skin scriber according to an embodiment of the present application includes a power circuit, a main control circuit electrically connected to the power circuit, the main control circuit and the a drive switch circuit electrically connected to a power supply circuit; a voltage conversion circuit electrically connected to the power supply circuit and the drive switch circuit; and a voltage conversion circuit electrically connected to the voltage conversion circuit. a drive signal output interface, wherein the power supply circuit supplies a power supply voltage, the main control circuit outputs a drive signal having a target frequency and a target duty ratio to the drive switch circuit, and the drive switch circuit: controlling the voltage conversion circuit based on the drive signal output from the main control circuit to perform voltage conversion on the power supply voltage supplied from the power supply circuit to obtain a target drive voltage; The target driving voltage is output to the ultrasonic peeling head of the skin scriber through the driving signal output interface to drive and vibrate the ultrasonic peeling head.

In an embodiment according to the present application, the target frequency range is 24.5 to 25.5 KHz, the target duty ratio range is 37%±2%, and the target drive voltage range is 2. 7 to 4.2V.

In an embodiment according to the present application, said main control circuit comprises a microcontroller, said microcontroller being electrically connected to said power supply circuit and said drive switch circuit.

In an embodiment according to the present application, the drive switch circuit includes a field effect transistor having a source electrode, a gate electrode, and a drain electrode, a first resistor, a second resistor, a third resistor, and a fourth resistor. The source electrode is grounded via the first resistor, the gate electrode is electrically connected to the main control circuit via the second resistor, and the drain electrode is connected to the The field effect transistor is electrically connected to the voltage conversion circuit, the field effect transistor is further electrically connected to the main control circuit via a third resistor, the field effect transistor is further connected to the fourth resistor, the It is electrically connected to the main control circuit via a second resistor.

In an embodiment according to the present application, the voltage conversion circuit comprises a transformer comprising a primary coil and a secondary coil, the primary coil being electrically connected to the drive switch circuit and the power supply circuit. and the secondary coil is electrically connected to the drive signal output interface.

In an embodiment according to the present application, the ultrasonic drive circuit further comprises an ion motion control circuit, the ion motion control circuit comprising a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a 9 resistors, a 10th resistor, an 11th resistor, a 12th resistor, a 13th resistor, a first bipolar transistor, a second bipolar transistor, a third bipolar transistor, a fourth bipolar transistor, and a handle a hand-held conductive strip connection interface for electrically connecting a conductive strip and a peeling head metal strip connection interface for electrically connecting a peeling head metal strip, the base of the first bipolar transistor comprising: electrically connected to the main control circuit through the fifth resistor, the emitter of the first bipolar transistor is grounded, and the collector of the first bipolar transistor is connected through the sixth resistor electrically connected to the peeling head metal strip connection interface, wherein the drive signal output interface is further electrically connected between the sixth resistor and the peeling head metal strip connection interface; The bases of two bipolar transistors are electrically connected to the main control circuit through the seventh resistor, the emitters of the second bipolar transistors are grounded, and the collectors of the second bipolar transistors are: electrically connected to the hand conductive strip connection interface through the thirteenth resistor, the collector of the third bipolar transistor is electrically connected to the collector of the second bipolar transistor, and the The emitter of the third bipolar transistor is electrically connected to the power supply circuit via the eighth resistor, and the base of the third bipolar transistor is connected to the collector of the fourth bipolar transistor via the tenth resistor. one end of the ninth resistor is electrically connected between the base of the third bipolar transistor and the tenth resistor, and the other end of the ninth resistor is: The eighth resistor is electrically connected between the emitter of the fourth bipolar transistor and the eleventh resistor is electrically connected between the base of the fourth bipolar transistor and the emitter. One end of the twelfth resistor is electrically connected to the base of the fourth bipolar transistor, and the other end of the twelfth resistor is connected between the thirteenth resistor and the collector of the second bipolar transistor. and the collector of the fourth bipolar transistor is further electrically connected between the sixth resistor and the collector of the first bipolar transistor, the first bipolar transistor and the second bipolar transistor are NPN bipolar transistors, and the third and fourth bipolar transistors are PNP bipolar transistors.

In an embodiment according to the present application, the ultrasonic driving circuit further comprises a switch control circuit, the switch control circuit comprising a control switch, a first indicator, a second indicator, a third indicator, and a third indicator. 14 resistors, a 15th resistor, and a 16th resistor, one end of the control switch is grounded through the 14th resistor, and the other end of the control switch is electrically connected to the main control circuit. the other end of the control switch is further electrically connected to the main control circuit and the power supply circuit via a second indicator lamp and a fifteenth resistor; One end of the second indicator is electrically connected between the second indicator and the fifteenth resistor, the other end of the first indicator is electrically connected to the main control circuit, and the One end of the third indicator light is electrically connected to the other end of the first indicator light, and the other end of the third indicator light is connected to the main control circuit and the power supply via the sixteenth resistor. electrically connected to the circuit.

In an embodiment according to the present application, the power supply circuit includes a first interface, a charging circuit, a battery interface, a booster circuit, and a constant voltage circuit, and the first interface is a power supply for connecting a power supply. a pin group, wherein the power pin group is electrically connected to the battery interface and the booster circuit via the charging circuit, and the booster circuit includes the constant voltage circuit, the main control circuit, the voltage It is electrically connected to a conversion circuit, and the constant voltage circuit is electrically connected to the main control circuit.

In yet another aspect, the ultrasonic driving circuit according to the embodiments of the present application includes a power circuit, a main control circuit electrically connected to the power circuit, and a main control circuit electrically connected to the main control circuit and the power circuit. a drive switch circuit connected to the power supply circuit and the drive switch circuit; a voltage conversion circuit electrically connected to the power supply circuit and the drive switch circuit; a drive signal output interface electrically connected to the voltage conversion circuit; wherein the main control circuit outputs a drive signal having a target frequency and a target duty ratio to the drive switch circuit, and the drive switch circuit operates the voltage conversion circuit based on the drive signal output from the main control circuit to convert the power supply voltage supplied from the power supply circuit to obtain a target drive voltage, and the voltage conversion circuit outputs the target drive voltage to the ultrasonic transducer via the drive signal output interface. The ultrasonic transducer converts the target drive voltage into ultrasonic waves and outputs them, the range of the target frequency is 24.5 to 25.5 KHz, and the range of the target duty ratio is 37% ±2%, and the range of the target drive voltage is 2.7-4.2V.

The above technical configurations of the present application have one or more advantageous effects as follows. The ultrasonic drive circuit according to the embodiment of the present application outputs a drive signal having a target frequency and a target duty ratio to the drive switch circuit via the main control circuit, and the drive switch circuit operates based on the drive signal output from the main control circuit. Then, the voltage conversion circuit is controlled to perform voltage conversion on the power supply voltage supplied from the power supply circuit to obtain the target drive voltage, and the obtained target drive voltage is sent to the ultrasonic peeling head via the drive signal output interface. When output, the ultrasonic peeling head is driven and vibrated to achieve silent effect, improve product quality and user experience. By providing an ion movement control circuit, a pattern that combines multiple functions of ion introduction, ion extraction and ultrasonic vibration can be realized to provide users with more choices, improve user experience, and improve product quality. coverage can also be improved. By providing a booster circuit in the power supply circuit, the power supply voltage input from the battery is boosted twice, which is advantageous in realizing better control of the voltage required for ultrasonic vibration.

The drawings described herein are for further understanding of the present application and form part of the present application, and the exemplary embodiments of the present application and their descriptions are for the purpose of interpreting the present application, and are not intended to mislead the present application. It's not meant to be limiting.
1 is a circuit diagram of an ultrasonic drive circuit according to an embodiment of the present application; FIG. 2 is a diagram showing a connection relationship between a main control circuit, a drive switch circuit, and a voltage conversion circuit in FIG. 1; FIG. FIG. 4 is another circuit diagram of an ultrasonic driving circuit according to an embodiment of the present application; 4 is a circuit diagram of the ion motion control circuit in FIG. 3; FIG. 4 is a circuit diagram of a switch control circuit in FIG. 3; FIG. 2 is a diagram showing a configuration of a power supply circuit in FIG. 1; FIG. FIG. 7 is a diagram showing a connection relationship between a first interface, a charging circuit, and a battery interface in FIG. 6; FIG. 7 is a circuit diagram of a booster circuit in FIG. 6; FIG. 7 is a circuit diagram of a constant voltage circuit in FIG. 6;

Also, unless contradicted, the examples in this application and the features in the examples can be combined with each other. Hereinafter, embodiments of the present application will be described with reference to the drawings.

For better understanding of the technical solution of the present application by those skilled in the art, the embodiments of the present application will be clearly and completely described in combination with the drawings and the embodiments of the present application. Moreover, the described embodiments are only some embodiments, but not all embodiments, of the present application. Other embodiments that a person skilled in the art can obtain from the embodiments in the present application without giving creative labor should also fall within the protection scope of the present application.

Terms such as "first" and "second" used in the specification, claims, and drawings of the present application are used to distinguish objects that are similar to each other. It is not meant to explain the order of things. Also, the terms so used may be used interchangeably where appropriate such that the embodiments of the application described herein may be performed in an order other than that illustrated or described. . Also, the terms "include," "comprise," and modifications to any of these are meant to cover non-exclusive inclusion. For example, a process, method, system, product or apparatus that includes a series of steps or units is not limited to steps or units that are specifically listed, or that are not specifically listed, or that these processes, Additional steps or units specific to the method, article of manufacture or device may also be included.

In addition, the term "and/or" in the text describes the relationship between related objects, and can indicate that there are three relationships. For example, A and/or B can indicate three cases, such as the sole presence of A, the simultaneous presence of A and B, and the sole presence of B. In addition, the symbol "/" in the text generally indicates that the object of the contextual relation is the relation of "or".

It should be noted that the division into a plurality of embodiments in the present application is for convenience of explanation and does not constitute a special limitation. be able to.

Referring to FIG. 1, the present application provides an ultrasonic driving circuit. The ultrasonic driving circuit in the embodiments of the present application can be applied to, for example, facial beauty equipment such as a skin scriber, and can also be applied to other equipment that employs ultrasonic driving (e.g., ultrasonic cleaning equipment). can. A skin scriber, for example, includes an ultrasonic drive circuit and an ultrasonic peeling head connected to the ultrasonic drive circuit. An ultrasonic drive circuit is connected to the ultrasonic drive circuit by generating a target frequency, a target duty ratio, and a drive signal that generates a target drive voltage based on the target frequency and the target duty ratio. It drives an ultrasonic peeling head to generate vibrations, and finally cleans the user's skin by removing aged keratin and the like.

Specifically, as shown in FIG. 1, the ultrasonic drive circuit 10 according to the embodiment of the present application includes, for example, a power supply circuit 110, a main control circuit 120, a drive switch circuit 130, and a power conversion circuit 140. , and a drive signal output interface 150 . A main control circuit 120 is electrically connected to the power supply circuit 110 . The drive switch circuit 130 is electrically connected to the main control circuit 120 and the power supply circuit 110 . A power conversion circuit 140 is electrically connected to the power supply circuit 110 and the drive switch circuit 130 . The driving signal output interface 150 is electrically connected to the power conversion circuit 140 to drive the ultrasonic peeling head of the skin scriber. The power supply circuit 110 is for supplying a power supply voltage, and the main control circuit 120 is for outputting a drive signal (for example, a pulse signal) having a target frequency and a target duty ratio to the drive switch circuit 130. The drive switch circuit 130 controls the voltage conversion circuit 140 based on a drive signal (for example, a pulse signal) output from the main control circuit 120 to convert the power supply voltage supplied from the power supply circuit 110. The voltage conversion circuit 140 outputs the target drive voltage to the ultrasonic peeling head via the drive signal output interface 150 to obtain a target drive voltage. It is for driving and vibrating the ultrasonic peeling head.

Specifically, the power supply circuit 110 is for supplying power to all circuits of the ultrasonic drive circuit 10 . The power supply circuit 110 can adopt existing mature power supply technology, for example. The main control circuit 120 is for outputting a drive signal having a frequency range of 24.5 to 25.5 KHz and a duty ratio of 37%±2%, and the drive signal may be, for example, a pulse signal. can. Based on the pulse signal output from the main control circuit 120, the drive switch circuit 130 controls the voltage conversion circuit 140 to perform voltage conversion (for example, step-up operation) on the power supply voltage supplied from the power supply circuit 110. The target drive voltage obtained by is output via the drive signal output interface 150 to drive the ultrasonic peeling head, where the voltage range of the target drive voltage is 2.7 to 4.2V.

The ultrasonic drive circuit 10 according to the embodiment of the present application outputs a drive signal having a target frequency and a target duty ratio to the drive switch circuit 130 via the main control circuit 120, and the drive switch circuit 130 outputs the signal from the main control circuit 120. Based on the drive signal, the voltage conversion circuit 140 is controlled to convert the power supply voltage supplied from the power supply circuit 110 to obtain a target drive voltage. output to the ultrasonic peeling head through the ultrasonic peeling head to drive the ultrasonic peeling head to vibrate, achieve a silent effect, improve product quality and user experience.

Further, as shown in FIG. 2, the main control circuit 120 comprises a microcontroller U2, which is connected to the power supply circuit 110 and the drive switch circuit . The microcontroller U2, which can be, for example, an MCU, is output from the P17 pin (see FIG. 2) to the drive switch circuit 130, with a frequency range of 24.5-25.5 KHz and a duty ratio of 37%±2%. It is for generating a certain drive signal. 2, the main control circuit 120 further comprises a buzzer BZ and a capacitor C5, the microcontroller U2 is electrically connected to one end of the buzzer BZ via the capacitor C5, The other end of the buzzer BZ is grounded.

2, the drive switch circuit 130 includes a field effect transistor Q2, a resistor R4 (corresponding to the first resistor), a resistor R9 (corresponding to the second resistor), and a resistor R11 (corresponding to the third resistor). resistor) and a resistor R10 (corresponding to the fourth resistor). The field effect transistor Q2 includes a source electrode S, a gate electrode G, and a drain electrode D, for example. A model number of the field effect transistor Q2 may be AO4430.

Also, as shown in FIG. 2, the voltage conversion circuit 140 includes, for example, a transformer T1, and the transformer T1 includes a primary coil T12 and a secondary coil T13.

As shown in FIG. 2, the source electrode S of the field effect transistor Q2 is grounded via a resistor R4, and the gate electrode G is connected via a resistor R9 to the main control circuit 120 (microcontroller U2 of the main control circuit 120). ), and the drain electrode D is electrically connected to one end of the primary coil T12 of the transformer T1 of the voltage conversion circuit 140. As shown in FIG. The field effect transistor Q2 is further electrically connected to (the microcontroller U2 of) the main control circuit 120 through a resistor R11, and the field effect transistor Q2 is further electrically connected to the main control circuit 120 through a resistor R10 and a resistor R9. It is electrically connected to the P17 pin of (microcontroller U2 of) main control circuit 120 . Also, as shown in FIG. 2, the other end of the primary coil T12 is electrically connected to the power supply circuit 110 to obtain the voltage V+ supplied by the power supply circuit 110, and the secondary coil T13. Both ends are electrically connected to two pins (ie, pins 2 and 3 of the CN1 terminal in FIG. 2) of the drive signal output interface 150 (ie, CN1 in FIG. 2), respectively.

Also, as shown in FIG. 3, the ultrasonic drive circuit 10 further comprises an ion motion control circuit 160 . The ion movement control circuit 160 is electrically connected to the main control circuit 120, the power supply circuit 110, and the drive signal output interface 150 to introduce ions (eg, potassium ions) into skin care products and into the body. It is for controlling the derivation of charged contamination (also called contamination ions).

Further, as shown in FIG. 4, the ion motion control circuit 160 includes, for example, a resistor R12 (corresponding to the fifth resistor), a resistor R18 (corresponding to the sixth resistor), and a resistor R19 (corresponding to the seventh resistor). ), a resistor R20 (corresponding to the eighth resistor), a resistor R14 (corresponding to the ninth resistor), a resistor R13 (corresponding to the tenth resistor), a resistor R15 (corresponding to the eleventh resistor), and a resistor R16 ( 12th resistor), resistor R17 (13th resistor), bipolar transistor Q6 (first bipolar transistor), bipolar transistor Q4 (second bipolar transistor), and bipolar transistor Q5 (second bipolar transistor). 3 bipolar transistor), a bipolar transistor Q3 (corresponding to the fourth bipolar transistor), a hand conductive strip connection interface CON1 for electrically connecting the hand conductive strip M, and the peeling head metal piece FA. and a peeling head metal strip connection interface CON3 for connecting to the same. The peeling head metal piece FA is a metal piece provided on the ultrasonic peeling head for removing stains on the skin, and the hand conductive strip M is a conductive member provided on the skin scriber. is. For example, when the user holds the skin scriber to apply beauty treatment to the facial skin, if the skin of the palm touches the conductive strip M of the hand and the skin of the face touches the peeling head metal piece FA, ion motion control is performed. The circuit 160, the palm and the skin of the face form a micro-current circuit, which can achieve the functions of introducing nutrient ions into skin care products, removing impurities from the body, and lifting the skin.

Specifically, as shown in FIG. 4, the base of the bipolar transistor Q6 is electrically connected to the U2-1 pin of (the microcontroller U2 of) the main control circuit 120 via a resistor R12. , the emitter of the bipolar transistor Q6 is grounded, the collector of the bipolar transistor Q6 is electrically connected to the peeling head metal strip connection interface CON3 through a resistor R18, and the drive signal output interface 150 is: Further, it is electrically connected between the resistor R18 and the peeling head metal strip connection interface CON3. The base of the bipolar transistor Q4 is electrically connected to the U2-3 pin of (the microcontroller U2 of) the main control circuit 120 through the resistor R19, and the emitter of the bipolar transistor Q4 is grounded. , the collector of the bipolar transistor Q4 is electrically connected to the hand conductive strip connection interface CON1 through a resistor R17. The collector of bipolar transistor Q5 is electrically connected to the collector of bipolar transistor Q4, and the emitter of bipolar transistor Q5 is electrically connected to (the power supply terminal V+ of) power supply circuit 110 via resistor R20. The base of bipolar transistor Q5 is electrically connected to the collector of bipolar transistor Q3 via resistor R13, and one end of resistor R14 is electrically connected between the base of bipolar transistor Q5 and resistor R13. , and the other end of resistor R14 is electrically connected between resistor R20 and the emitter of bipolar transistor Q3. A resistor R15 is electrically connected between the base of bipolar transistor Q3 and the emitter. One end of the resistor R16 is electrically connected to the base of the bipolar transistor Q3, and the other end of the resistor R16 is electrically connected between the resistor R17 and the collector of the bipolar transistor Q4. is also electrically connected between resistor R18 and the collector of bipolar transistor Q6.

More specifically, bipolar transistor Q6 and bipolar transistor Q4 are NPN bipolar transistors, and bipolar transistor Q5 and bipolar transistor Q3 are PNP bipolar transistors.

The working principle of the ion motion control circuit 160 is as follows. If the voltage output from the U2-1 pin of the microcontroller U2 = 1 (or high level) and the voltage output from the U2-3 pin of the microcontroller U2 = 0 (or low level), then the bipolar Transistor Q6 is turned on and divided by resistors R14 and R13 to lower the voltage at the base of bipolar transistor Q5 and turn on bipolar transistor Q5, while the hand conductive strip connecting hand conductive strip M. The voltage of the connection interface CON1 becomes +, and the voltage of the peeling head metal piece connection interface CON3 that connects the peeling head FA becomes -, and the skin scriber at this time exhibits an iontophoretic function, that is, the skin scriber in the skin care product. Nutrient ions (eg, potassium ions) are introduced into the skin. If the voltage output from U2-3 pin=1 (or high level) and the voltage output from U2-1 pin=0 (or low level), then bipolar transistor Q4 is conducting and resistor R15. and the resistor R16, the voltage at the base of the bipolar transistor Q3 is lowered to render the bipolar transistor Q3 conductive. , the voltage of the peeling head metal piece connection interface CON3 that connects the peeling head FA becomes +, and the skin scriber at this time exhibits an ion derivation function, that is, removes dirt ions (e.g., charged dirt) from the body. It is drawn out of the skin and removed by the peeling head FA.

In another embodiment of the present application, the ultrasonic drive circuit 10 further comprises a switch control circuit 170, which is connected to the power supply circuit 110 and the main control circuit 120, as shown in FIG. electrically connected. The switch control circuit 170 is used for function selection and control of the skin scriber, such as turn on, turn off, vibration + ion extraction, vibration + iontophoresis, and the like.

Specifically, as shown in FIG. 5, the switch control circuit 170 includes, for example, a control switch S1, a first indicator LD1, a second indicator LD2, a third indicator LD3, and a resistor R5. (corresponding to the 14th resistor), a resistor R7 (corresponding to the 15th resistor), and a resistor R8 (corresponding to the 16th resistor). One end of the control switch S1 is grounded through a resistor R5, and the other end of the control switch S1 is electrically connected to the KEY2 pin of (the microcontroller U2 of) the main control circuit 120, The other end of the control switch S1 is further electrically connected to the LED2 pin of (the microcontroller U2 of) the main control circuit 120 and the power supply circuit 110 via a second indicator light LD2 and a resistor R7. One end of the first indicator light LD1 is electrically connected between the second indicator light LD2 and a resistor R7, and the other end of the first indicator light LD1 is connected to the main control circuit 120 (the microcontroller of the main control circuit 120). It is electrically connected to the KEY1 pin of the controller U2). One end of the third indicator light LD3 is electrically connected to the other end of the first indicator light LD1, and the other end of the third indicator light LD3 is connected to the main control circuit via the resistor R8. It is electrically connected to the LED1 pin of the microcontroller U2 of 120 and to the power circuit 110 .

Specifically, the manufacturing process of the switch control circuit 170 is as follows, for example. It is turned on when the user presses the control switch S1 for 2 seconds. After being turned on, the skin scriber is in the first-class work mode, the first indicator light LD1 is turned on, the ultrasonic driving circuit 10 continuously outputs ultrasonic waves to perform cleaning work, The main control circuit 120 controls the ion movement control circuit 160 to achieve the function of deriving positive ions, and when the user presses the control switch S1 again, the skin scriber enters the second-class work mode, and the second The indicator light LD2 is turned on, the ultrasonic driving circuit 10 intermittently outputs ultrasonic waves, the main control circuit 120 controls the ion movement control circuit 160 to achieve the function of iontophoresis, and the user operates the control switch. When S1 is pressed again, the skin scriber enters the third class work mode, the third indicator light LD3 lights up, the ultrasonic drive circuit 10 intermittently outputs ultrasonic waves, and the main control circuit 120 The ion movement control circuit 160 is controlled to achieve the functions of ion introduction, skin lifting, etc. When the user presses the control switch S1 again, the skin scriber is restored to the first-class work mode, and the first The indicator lamp LD1 is lit, the ultrasonic drive circuit 10 continuously outputs ultrasonic waves to perform cleaning work, and the main control circuit 120 controls the ion movement control circuit 160 to realize the function of deriving positive ions, , and so on. It is turned off when the user presses the control switch S1 for 2 seconds. Also, when the microcontroller U2 detects that the skin scriber is in a charging state, it is forced to turn off, and it cannot be turned on at this time, and the three indicator lights LD1 to LD3 are in a charging state with slow flashing. When the skin scriber is fully charged, the three indicator lights LD1-LD3 are lit for a long time.

In yet another embodiment of the present application, as shown in FIG. 6, the power circuit includes, for example, a first interface 111, a charging circuit 112, a battery interface 113, a boost circuit 114, a constant voltage circuit 115, Prepare. The first interface 111 is electrically connected to the battery interface 113 and the booster circuit 114 via the charging circuit 112. The booster circuit 114 includes the constant voltage circuit 115, the main control circuit 120, The voltage conversion circuit 140 is electrically connected, the constant voltage circuit 115 is electrically connected to the main control circuit 120, and the charging circuit 112 is further connected to the main control circuit 120 and the switch. It is electrically connected to the control circuit 170 .

Specifically, as shown in FIG. 7, the first interface 111 (ie, INUSB in FIG. 7) can be, for example, a USB interface, and includes a power supply pin group (eg, VBUS pin and thus AGND pin). , for connecting the power supply. The power pin group is electrically connected to the battery interface 113 and the boost circuit 114 via the charging circuit 112 .

The charging circuit 112 comprises, for example, a power management chip U3, and the model number of the power management chip U3 can be TP4057. The VCC pin of the power management chip U3 is connected to the VBUS pin of the first interface 111 (ie INUSB in FIG. 7) to obtain power. The STDBY pin of power management chip U3 is connected to the LED1 pin of microcontroller U2 through resistor R04. The GHRG pin of power management chip U3 is connected to the LED2 pin of microcontroller U2 through resistor R05. The BAT pin of the power management chip U3 is connected as a voltage output pin to the battery interface 113 (i.e. the CON2 interface in FIG. 7), which in turn is connected to the skin scriber's battery (e.g. storage battery) or the like. to store electrical energy. The charging circuit 112 may further comprise other electrical components, such as capacitors C01 and C02 and resistor R02, to jointly implement the battery charging function. The charging circuit 112 is not limited to this, as it may be realized with another charging circuit in existing technology.

In addition, as shown in FIG. 7, the first interface 111 further comprises a data write pin group (eg, D- pin and D+ pin) electrically connected to the main control circuit 1120, such as D The − pin is connected to the ISPDAT pin, and the D+ pin is connected to the ISPCK pin, so that data can be written to the microcontroller U2 of the main control circuit 120 to realize program writing and simulation debugging of the microcontroller U2. can.

Furthermore, as shown in FIG. 7, the above-described ultrasonic wave driving circuit 10 further includes a second interface ISP, which electrically connects the main control circuit 120 and the first interface 111. It is for writing data to the main control circuit. Specifically, one pin of the second interface ISP is connected between the D− pin of the first interface 111 and the ISPDAT pin of the microcontroller U2, and another pin of the second interface ISP is connected to the D+ pin of the first interface 111. It can also be connected between the pin and the ISPCK pin of the microcontroller U2 to write data to the microcontroller U2 by the second interface ISP to realize program writing and simulation debugging of the microcontroller U2. In this way, the user can realize programming and simulation debugging of the microcontroller U2 through the first interface 111 or the second interface ISP.

Also, as shown in FIG. 8, the booster circuit 114 includes, for example, a booster chip U4. The boosting chip U4 is, for example, an MT3608 chip, and can boost the DC power supply voltage. The voltage input terminal of the boost circuit 114 is B+, which is connected to the charging circuit 112 and the main control circuit 120; It is connected to the. Of course, the boost circuit 114 may also include other electrical components, such as resistors R1, R2, R3, capacitors C1 and C3, inductor L1, etc. in FIG. 8, to jointly implement the function of boosting the power supply voltage. However, it may be implemented by a booster circuit in existing technology, so it is not limited to this.

Also, as shown in FIG. 9, the constant voltage circuit 115 includes, for example, a constant voltage chip U1, a capacitor C7, and a capacitor C8. The constant voltage chip U1 has an input terminal pin Vin, an output terminal pin Vout, and a ground terminal pin GND. The capacitor C7 is connected between the input terminal pin Vin and the ground terminal pin GND, and the capacitor C8 is connected between the output terminal pin Vout and the ground terminal pin GND. The input terminal pin Vin is connected to the voltage output terminal V+ of the booster circuit 114, and the output terminal pin Vout is connected to the main control circuit 120 (microcontroller U2 thereof). Of course, the constant voltage circuit 115 may be realized by a constant voltage circuit in existing technology, so it is not limited to this.

The fabrication process of the ultrasonic drive circuit 10 according to another embodiment of the present application can also be as follows. After the user selects the work mode, the main control circuit (the microcontroller U2 of the main control circuit) sends an enable signal to the boost enable pin of the boost chip U4 of the boost circuit, so that the battery input through the battery interface 113 After the voltage is first boosted, the boosted voltage is output to the voltage conversion circuit 140, then the P17 pin of U2 has a frequency range of 24.5-25.5KHz and a duty ratio of 37%±2%. A drive signal (for example, a PWM signal) is output to the drive switch circuit 130, and the drive switch circuit 130 drives the transformer T1 of the drive conversion circuit 140 to re-boost the voltage initially boosted by the power supply circuit 110. to obtain a target drive voltage in the range of 2.7 to 4.2 V, and the obtained target drive voltage is output to the ultrasonic peeling head via the drive signal output interface 150 to drive the ultrasonic peeling head and perform ultrasonic Realize sonic vibration.

Also, in another embodiment of the present application, the ultrasonic driving circuit described above can be applied to an ultrasonic washing machine, an ultrasonic glasses washing machine, or other equipment. Specifically, an apparatus such as an ultrasonic cleaning machine is provided with an ultrasonic transducer connected to the ultrasonic driving circuit in addition to the ultrasonic driving circuit described above. The main control circuit in the ultrasonic drive circuit outputs a drive signal having a target frequency and a target duty ratio to the drive switch circuit, and the drive switch circuit outputs the voltage based on the drive signal output from the main control circuit. A conversion circuit is driven to perform voltage conversion on the power supply voltage supplied from the power supply circuit to obtain a target drive voltage, and the voltage conversion circuit exceeds the target drive voltage via the drive signal output interface. output to a sonic transducer, the ultrasonic transducer converts the target driving voltage into ultrasonic waves and outputs them, finally realizing the cleaning function with ultrasonic waves. Here, the range of the target frequency is 24.5-25.5 KHz, the range of the target duty ratio is 37%±2%, and the range of the target drive voltage is 2.7-4. 2V.

As described above, the ultrasonic drive circuit 10 according to the embodiment of the present application outputs a drive signal having a target frequency and a target duty ratio to the drive switch circuit 130 via the main control circuit 120, and the drive switch circuit 130 , based on the drive signal output from the main control circuit 120, the voltage conversion circuit is controlled to convert the power supply voltage supplied from the power supply circuit 110 to obtain a target drive voltage, and the obtained target drive voltage is , is output to the ultrasonic peeling head through the driving signal output interface 150 to drive and vibrate the ultrasonic peeling head to achieve a silent effect, improve product quality and user experience. By providing an ion movement control circuit, a pattern that combines multiple functions of ion introduction, ion extraction and ultrasonic vibration can be realized to provide users with more choices, improve user experience, and improve product quality. coverage can also be improved. By providing a booster circuit in the power supply circuit, the power supply voltage input from the battery is boosted twice, which is advantageous in realizing better control of the voltage required for ultrasonic vibration.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes can be made to the present application by those skilled in the art. Any modification, equivalent replacement or improvement within the spirit and principle of the present application shall fall within the protection scope of the present application.

Claims (10)

An ultrasonic drive circuit applied to a skin scriber,
a power circuit;
A main control circuit comprising a microcontroller, a capacitor, and a buzzer, wherein the microcontroller is electrically connected to the buzzer through the capacitor, and the microcontroller is further connected to the power supply circuit. a main control circuit electrically connected;
a drive switch circuit electrically connected to the microcontroller and the power supply circuit;
a voltage conversion circuit comprising a primary coil and a secondary coil, wherein both ends of the primary coil are electrically connected to the power supply circuit and the drive switch circuit, respectively;
a drive signal output interface electrically connected to the secondary coil of the voltage conversion circuit;
a switch circuit electrically connected to the power supply circuit and the microcontroller;
an ion motion control circuit electrically connected to the microcontroller, the power supply circuit, and the drive signal output interface;
The drive switch circuit includes a field effect transistor having a source electrode, a gate electrode, and a drain electrode, a first resistor, a second resistor, a third resistor, and a fourth resistor, the source electrode comprising: grounded through the first resistor, the gate electrode electrically connected to the microcontroller through the second resistor, and the drain electrode connected to the primary coil of the voltage conversion circuit. The field effect transistor is further electrically connected to the microcontroller through a third resistor, the field effect transistor is further electrically connected to a fourth resistor, the second electrically connected to the microcontroller through a resistor;
The microcontroller outputs a drive signal having a target frequency and a target duty ratio to the field effect transistor, and the field effect transistor controls the voltage conversion circuit based on the drive signal output from the main control circuit. a target drive voltage is obtained by performing voltage conversion on the power supply voltage supplied from the power supply circuit, and the voltage conversion circuit converts the target drive voltage to the ultrasonic peeling head of the skin scriber through the drive signal output interface; to drive and vibrate the ultrasonic peeling head, the target frequency range is 24.5 to 25.5 KHz, the target duty ratio range is 37% ± 2%, The ultrasonic drive circuit, wherein the range of the target drive voltage is 2.7 to 4.2V. An ultrasonic drive circuit applied to a skin scriber,
a power circuit;
a main control circuit electrically connected to the power supply circuit;
a drive switch circuit electrically connected to the main control circuit and the power supply circuit;
a voltage conversion circuit electrically connected to the power supply circuit and the drive switch circuit;
a drive signal output interface electrically connected to the voltage conversion circuit;
The power supply circuit supplies a power supply voltage, the main control circuit outputs a drive signal having a target frequency and a target duty ratio to the drive switch circuit, and the drive switch circuit outputs the drive output from the main control circuit. The voltage conversion circuit is controlled based on the signal to perform voltage conversion on the power supply voltage supplied from the power supply circuit to obtain a target drive voltage, and the voltage conversion circuit outputs the target drive voltage through the drive signal output interface. An ultrasonic drive circuit, wherein a target drive voltage is output to an ultrasonic peeling head of the skin scriber to drive and vibrate the ultrasonic peeling head. The target frequency range is 24.5-25.5 KHz, the target duty ratio range is 37%±2%, and the target drive voltage range is 2.7-4.2V. 3. The ultrasonic drive circuit according to claim 2, wherein: 3. The ultrasonic drive circuit of claim 2, wherein said main control circuit comprises a microcontroller, said microcontroller being electrically connected to said power supply circuit and said drive switch circuit. The drive switch circuit includes a field effect transistor having a source electrode, a gate electrode, and a drain electrode, a first resistor, a second resistor, a third resistor, and a fourth resistor, the source electrode comprising: The gate electrode is electrically connected to the main control circuit via the second resistance, and the drain electrode is electrically connected to the voltage conversion circuit. The field effect transistor is further electrically connected to the main control circuit via a third resistor, and the field effect transistor is further electrically connected to the main control circuit via a fourth resistor and the second resistor. 3. The ultrasonic drive circuit of claim 2, electrically connected to the main control circuit. The voltage conversion circuit includes a transformer including a primary coil and a secondary coil, the primary coil being electrically connected to the drive switch circuit and the power supply circuit, and the secondary coil being , is electrically connected to the drive signal output interface. The ultrasonic drive circuit further comprises an ion motion control circuit, the ion motion control circuit comprising a fifth resistance, a sixth resistance, a seventh resistance, an eighth resistance, a ninth resistance and a tenth resistance. , the eleventh resistor, the twelfth resistor, the thirteenth resistor, the first bipolar transistor, the second bipolar transistor, the third bipolar transistor, the fourth bipolar transistor, and the hand conductive strip. and a peeling head metal strip connection interface for electrically connecting a peeling head metal strip, wherein the base of the first bipolar transistor is connected through the fifth resistor to electrically connected to the main control circuit, the emitter of the first bipolar transistor is grounded, and the collector of the first bipolar transistor is connected to the peeling head metal strip connection interface through the sixth resistor; and the drive signal output interface is further electrically connected between the sixth resistor and the peeling head metal strip connection interface, the base of the second bipolar transistor comprising: It is electrically connected to the main control circuit through the seventh resistor, the emitter of the second bipolar transistor is grounded, and the collector of the second bipolar transistor is connected through the thirteenth resistor. electrically connected to the hand conductive strip connection interface, the collector of the third bipolar transistor is electrically connected to the collector of the second bipolar transistor, and the emitter of the third bipolar transistor is , is electrically connected to the power supply circuit through the eighth resistor, and the base of the third bipolar transistor is electrically connected to the collector of the fourth bipolar transistor through the tenth resistor. , one end of the ninth resistor is electrically connected between the base of the third bipolar transistor and the tenth resistor, and the other end of the ninth resistor is connected between the eighth resistor and the tenth resistor. 4 The 11th resistor is electrically connected between the base and the emitter of the 4th bipolar transistor, and the 12th resistor is electrically connected between the emitter of the 4th bipolar transistor. One end is electrically connected to the base of the fourth bipolar transistor, and the other end of the twelfth resistor is electrically connected between the thirteenth resistor and the collector of the second bipolar transistor. the collector of the fourth bipolar transistor is further electrically connected between the sixth resistor and the collector of the first bipolar transistor;
3. The apparatus according to claim 2, wherein said first bipolar transistor and said second bipolar transistor are NPN bipolar transistors, and said third bipolar transistor and said fourth bipolar transistor are PNP bipolar transistors. ultrasonic drive circuit. The ultrasonic drive circuit further includes a switch control circuit, the switch control circuit including a control switch, a first indicator, a second indicator, a third indicator, a fourteenth resistor, and a fifteenth resistor. and a sixteenth resistor, one end of the control switch is grounded via the fourteenth resistor, and the other end of the control switch is electrically connected to the main control circuit, The other end of the control switch is further electrically connected to the main control circuit and the power supply circuit via a second indicator lamp and a fifteenth resistor, and one end of the first indicator lamp is connected to the second An indicator light is electrically connected between the fifteenth resistor, the other end of the first indicator light is electrically connected to the main control circuit, and one end of the third indicator light is electrically connected to the main control circuit. , and the other end of the third indicator is electrically connected to the main control circuit and the power supply circuit via the sixteenth resistor. 3. The ultrasonic driving circuit according to claim 2, characterized in that: The power supply circuit includes a first interface, a charging circuit, a battery interface, a booster circuit, and a constant voltage circuit, the first interface includes a power supply pin group for connecting a power supply, and the power supply The pin group is electrically connected to the battery interface and the booster circuit via the charging circuit, and the booster circuit is electrically connected to the constant voltage circuit, the main control circuit, and the voltage conversion circuit. The constant voltage circuit is electrically connected to the main control circuit, and the booster circuit is further electrically connected to the main control circuit and the switch control circuit. 3. The ultrasonic drive circuit according to claim 2. a power circuit;
a main control circuit electrically connected to the power supply circuit;
a drive switch circuit electrically connected to the main control circuit and the power supply circuit;
a voltage conversion circuit electrically connected to the power supply circuit and the drive switch circuit;
a drive signal output interface electrically connected to the voltage conversion circuit;
The main control circuit outputs a drive signal having a target frequency and a target duty ratio to the drive switch circuit, and the drive switch circuit drives the voltage conversion circuit based on the drive signal output from the main control circuit. a target drive voltage is obtained by performing voltage conversion on the power supply voltage supplied from the power supply circuit, the voltage conversion circuit outputting the target drive voltage to the ultrasonic transducer via the drive signal output interface; The ultrasonic transducer converts the target drive voltage into ultrasonic waves and outputs them,
The target frequency range is 24.5-25.5 KHz, the target duty ratio range is 37%±2%, and the target drive voltage range is 2.7-4.2V. An ultrasonic drive circuit characterized by:

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