Driving circuit, reminding device and beauty equipment

Abstract

The utility model discloses a driving circuit, a reminding device and beauty equipment, the driving circuit is used for driving a buzzer, and the driving circuit comprises a tone adjusting circuit module, a chord sound generating circuit module and a chord sound control circuit unit; the tone adjusting circuit module is connected with the first end of the buzzer and is used for adjusting the tone of the buzzer; the chord sound generating circuit module is connected with the second end of the buzzer; the chord sound generation circuit module comprises a first switch tube, the first end of the first switch tube is connected with the second end of the buzzer, and the second end of the first switch tube is connected with a preset power supply; and the chord sound control circuit unit is connected with the control end of the first switch tube and is used for controlling the first switch tube to maintain an amplification state of a preset duration when the first switch tube is switched on or switched off, so that the buzzer generates chord sound. The circuit and the device provided by the utility model can realize accurate control on the tone of the buzzer and the chord sound, solve the problems that the chord sound volume is small and the instantaneous volume reaches the maximum value in the prior art, improve the sound effect expression capability of the buzzer, and enable the buzzer to provide more flexible and diversified audio effects.

Description

Technical Field

[0001] The utility model relates to the field of electronic technology, in particular to a driving circuit, a reminding device and a beauty device. Background Art

[0002] In the prior art, the driving circuit of the buzzer uses a capacitor element to store energy and is controlled by a switch element to produce a chord sound effect when the switch element is turned off. However, this design has some problems in volume control. The current is limited by the small energy storage capacity of the capacitor, resulting in a short time for the chord sound to pass through the buzzer, resulting in a weaker presentation of the chord sound. In addition, due to the working mode of the switch element, the buzzer is directly powered on when it is turned on, causing the instantaneous volume of the chord sound to reach the maximum value, and there is a lack of a gradual increase in volume, which affects the layering and expressiveness of the buzzer sound effect. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to propose a driving circuit, which can realize accurate control of the tone and chord sound generation of the buzzer, solve the problem of low chord sound volume and instantaneous maximum volume in the prior art, improve the sound effect performance of the buzzer, and enable the buzzer to provide more flexible and diversified audio effects.

[0004] The second purpose of the utility model is to provide a reminder device.

[0005] The third purpose of the present invention is to provide a beauty device.

[0006] In order to achieve the above-mentioned purpose, the driving circuit of the first aspect of the present invention is used to drive a buzzer, and the driving circuit includes: a tone adjustment circuit module, which is connected to the first end of the buzzer and is used to adjust the tone of the buzzer; a chord sound generating circuit module, which is connected to the second end of the buzzer; the chord sound generating circuit module includes: a first switch tube, the first end of the first switch tube is connected to the second end of the buzzer, and the second end of the first switch tube is connected to a preset power supply; a chord sound control circuit unit, the chord sound control circuit unit is connected to the control end of the first switch tube, and is used to control the first switch tube to maintain an amplification state of a preset time length when it is turned on or off, so that the buzzer produces a chord sound.

[0007] According to the driving circuit of the utility model, by adjusting the parameters of components such as resistors and switch tubes in the circuit, the output frequency of the tone adjustment circuit module can be accurately controlled by the control unit, thereby affecting the tone of the sound emitted by the buzzer, and by controlling the first switch tube to switch between the off and on states, and controlling the preset power supply to power the buzzer, the generation of chord sounds can be achieved. In addition, the chord sound control circuit unit can control the first switch tube to maintain an amplification state of a preset time length when it is turned on or off by controlling the charging and discharging of the capacitor, so that the buzzer generates chord sounds. Therefore, through the synergistic effect of the tone adjustment circuit module, the chord sound generation circuit module and the chord sound control circuit unit, the driving circuit of the utility model realizes precise control of the buzzer tone and chord sound generation, which solves the problem of small chord sound volume and instantaneous maximum volume in the prior art, and improves the sound performance ability of the buzzer. Such a design provides a more flexible and adjustable tone effect, so that the buzzer can adapt to different music needs and usage scenarios.

[0008] In some embodiments, the chord tone control circuit unit includes: a first charging and discharging electronic unit, a first end of the first charging and discharging electronic unit is suitable for receiving a chord tone enable signal, a second end of the first charging and discharging electronic unit is grounded, and is used for charging when the chord tone enable signal is a first enable signal, and discharging when the chord tone enable signal is a second enable signal; a second switch tube, a control end of the second switch tube is connected to a third end of the first charging and discharging electronic unit, a first end of the second switch tube is grounded, and the second switch tube is used to gradually turn on according to a charging state when the first charging and discharging electronic unit is charged and to turn off when the first charging and discharging electronic unit is discharged; a second charging and discharging electronic unit, a first end of the second charging and discharging electronic unit is connected to a second end of the second switch tube, a second end of the second charging and discharging electronic unit is connected to a preset power supply, a third end of the second charging and discharging electronic unit is connected to the control end of the first switch tube, and a fourth end of the second charging and discharging electronic unit is grounded, and is used for discharging when the second opening tube is turned on, and charging when the second switch tube is turned off.

[0009] In some embodiments, the first charging and discharging electronic unit includes: a first diode, the cathode of the first diode is suitable for connecting to the control unit of the buzzer to receive the chord tone enable signal; a first capacitor, the first end of the first capacitor is respectively connected to the anode of the first diode and the control end of the second switch tube, and the second end of the first capacitor is grounded.

[0010] In some embodiments, the first charging and discharging electronic unit also includes: a first resistor, a first end of the first resistor is suitable for connecting to the control unit of the buzzer, and a second end of the first resistor is connected to the cathode of the first diode; a second resistor, a first end of the second resistor is connected to the second end of the first resistor and the cathode of the first diode, and a second end of the second resistor is connected to the anode of the first diode, the first end of the first capacitor and the control end of the second switch tube; a third resistor, a first end of the third resistor is connected to the second end of the second resistor, the anode of the first diode, the first end of the first capacitor and the control end of the second switch tube, and a second end of the third resistor is grounded.

[0011] In some embodiments, the second charging and discharging electronic unit includes: a second capacitor, a first end of the second capacitor is suitable for connecting to the preset power supply, the control end of the first switch tube and the second end of the second switch tube, and a second end of the second capacitor is grounded.

[0012] In some embodiments, the second charging and discharging electronic unit further includes: a fourth resistor, a first end of the fourth resistor is connected to the second end of the second switch tube, and a second end of the fourth resistor is connected to the first end of the second capacitor and the control end of the first switch tube; a fifth resistor, a first end of the fifth resistor is connected to the preset power supply, and a second end of the fifth resistor is connected to the second end of the fourth resistor, the control end of the first switch tube and the first end of the second capacitor.

[0013] In some embodiments, a sixth resistor is further provided between the first end of the first switch tube and the second end of the buzzer.

[0014] In some embodiments, the tone adjustment circuit module includes: a third switch tube, the control end of the third switch tube is suitable for connecting to the control unit of the buzzer to receive a driving signal, the first end of the third switch tube is connected to the first end of the buzzer, and the second end of the third switch tube is grounded.

[0015] In some embodiments, the tone adjustment circuit module also includes: a seventh resistor, a first end of the seventh resistor is connected to the control unit of the buzzer, and a second end of the seventh resistor is connected to the control end of the third switch tube; an eighth resistor, a first end of the eighth resistor is connected to the second end of the seventh resistor and the control end of the third switch tube, and a second end of the eighth resistor is grounded.

[0016] In some embodiments, the driving circuit further includes: a filtering module, a first end of the filtering module is connected to the preset power supply, and a second end of the filtering module is grounded.

[0017] In some embodiments, the filtering module includes: a third capacitor, a first end of the third capacitor is connected to the preset power supply, and a second end of the third resistor is grounded; a fourth capacitor, a first end of the fourth resistor is connected to the preset power supply, and a second end of the fourth resistor is grounded.

[0018] In some embodiments, the driving circuit further includes a second diode, an anode of the second diode is connected to the first end of the buzzer, and a cathode of the second diode is connected to the second end of the buzzer.

[0019] In order to achieve the above-mentioned purpose, the reminder device of the second aspect of the utility model includes: a buzzer; a driving circuit as described in the above embodiment, the driving circuit is connected to the buzzer; a control unit, the control unit is connected to the driving circuit to send a driving signal and a chord tone enable signal to the buzzer.

[0020] According to the reminder device of the utility model, the control unit realizes precise control of the tone adjustment circuit module, the chord tone generating circuit module and the chord tone control circuit unit by sending the buzzer driving signal and the chord tone enable signal to the driving circuit, thereby effectively solving the problems of low chord tone volume and instantaneous maximum volume in the prior art, improving the sound effect performance capability of the buzzer, and enabling the buzzer to provide more flexible and diverse audio effects to meet different scenarios and user needs.

[0021] In order to achieve the above-mentioned purpose, the beauty device of the third embodiment of the utility model includes: the reminder device described in the above embodiment.

[0022] According to the beauty device of the utility model, by adopting the reminder device described in the above embodiment, it is possible to achieve precise control of the tone of the buzzer and the generation of chord sounds, thereby solving the problems of low chord sound volume and instantaneous maximum volume in the prior art, improving the sound effect performance capability of the buzzer, and allowing the beauty device to provide more flexible and diverse audio effects during use to meet the user's personalized needs, thereby enhancing the user experience of the beauty device.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 is a schematic diagram of a driving circuit according to an embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of a buzzer sound volume change curve according to an embodiment of the utility model;

[0027] Figure 3 is a block diagram of a reminder device according to an embodiment of the utility model;

[0028] Figure 4 is a block diagram of a beauty device according to an embodiment of the present utility model.

[0029] Reference numerals:

[0030] Beauty equipment 100;

[0031] Reminding device 1;

[0032] Driving circuit 10; buzzer 20;

[0033] Tone adjustment circuit module 11; chord tone generation circuit module 12; chord tone control circuit unit 13; filter module 14; sixth resistor 15; second diode 16;

[0034] The third switch tube 110; the seventh resistor 111; the eighth resistor 112; the first switch tube 121; the first charge-discharge electronic unit 131; the second switch tube 132; the second charge-discharge electronic unit 133; the third capacitor 141; the fourth capacitor 142;

[0035] The first diode 1311 , the first capacitor 1312 , the first resistor 1313 , the second resistor 1314 , the third resistor 1315 , the second capacitor 1331 , the fourth resistor 1332 , and the fifth resistor 1333 . DETAILED DESCRIPTION

[0036] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0037] Reference below Figure 1 A driving circuit according to an embodiment of the present invention is described.

[0038] Figure 1 is a schematic diagram of a driving circuit according to an embodiment of the utility model, such as Figure 1 As shown, the driving circuit 10 includes: a tone adjustment circuit module 11, a chord tone generation circuit module 12 and a chord tone control circuit unit 13.

[0039] In some embodiments, the driving circuit 10 can be an analog driving circuit 10, which can use analog signals to adjust the tone and duration of the buzzer 20, which can be controlled by components such as resistors, capacitors, amplifiers, and switches in the circuit. The function of the driving circuit 10 is to control the way the buzzer 20 sounds and the tone generation to produce a specific sound effect. In addition, it can not only simply drive the buzzer 20 to sound, but also provide users with a variety of functions, such as alarms, reminders, or music performances.

[0040] In some embodiments, Figure 1 As shown, the tone adjustment circuit module 11 is connected to the first end of the buzzer 20, and is used to adjust the tone of the buzzer 20. Among them, the tone adjustment circuit module 11 can be a circuit module using PFM (Pulse Frequency Modulation) technology. PFM can control different frequencies of the output signal by changing the frequency and width of the PFM signal. This technology is usually used in DCDC (Direct Current-Direct Current) circuits, buzzers 20, etc. to achieve precise control of their power and operating status.

[0041] In the driving circuit 10 of the embodiment of the utility model, PFM can be used to adjust the frequency and tone of the buzzer 20. By adjusting the frequency of the PFM signal, the frequency of the buzzer 20 can be changed, thereby achieving the generation of different tones. This technology is widely used in electronic devices to achieve control and adjustment of audio output.

[0042] Specifically, PFM can be used to control the operating frequency and tone of the buzzer 20. By adjusting the width and frequency of the pulse, the tone and volume of the sound generated by the buzzer 20 can be changed. PFM mainly achieves this adjustment by adjusting the working time of switching elements such as MOSFET (Metal Oxide Semiconductor Field Effect Transistor). When the MOSFET is in the on state, current flows through the buzzer 20 and generates sound; when the MOSFET is in the off state, the buzzer 20 stops sounding. By changing the on time and off time of the MOSFET, the sound characteristics of the buzzer 20 can be adjusted, thereby achieving the adjustment of the tone.

[0043] In some embodiments, the chord tone generating circuit module 12 is connected to the second end of the buzzer 20. The main function of the circuit module is to generate a signal with a specific frequency and timing to drive the buzzer 20 to emit a chord tone. Figure 1As shown, the chord tone generating circuit module 12 includes a first switch tube 121. The first switch tube 121 can be a transistor or a field effect tube, such as a MOSFET. The first switch tube 121 can be switched between on and off under the action of a control signal. The switch tube has a high switching speed and reliability and is suitable for driving the buzzer 20.

[0044] In some embodiments, the first end of the first switch tube 121 is connected to the second end of the buzzer 20, and the second end of the first switch tube 121 is connected to the preset power supply ( Figure 1 Specifically, by controlling the on and off states of the first switch tube 121, the connection between the preset power supply and the buzzer 20 can be controlled, thereby controlling the working state of the buzzer 20 to produce a chord sound effect. When the first switch tube 121 is in the on state, the preset power supply is connected to the buzzer 20, and the current flows through the buzzer 20, and the buzzer 20 works and produces sound. When the first switch tube 121 is in the off state, the preset power supply is disconnected from the buzzer 20, the current stops flowing, and the buzzer 20 stops sounding. By controlling the on and off states of the first switch tube 121, the sound generation and stopping of the buzzer 20 can be realized, thereby realizing the generation of chord sounds.

[0045] In some embodiments, the chord tone control circuit unit 13 may be a circuit module including components such as capacitors, resistors, diodes, and switches. The chord tone control circuit unit 13 is connected to the control end of the first switch tube 121, and is used to control the first switch tube 121 to maintain an amplification state of a preset duration when it is turned on or off, so that the buzzer 20 generates chord tones.

[0046] In some embodiments, the switch state of the first switch tube 121 maintaining a preset time length when it is turned on or off may refer to the first switch tube 121 being able to maintain a preset time in the on or off state to achieve the desired chord sound effect. The switch state here does not refer to the working state of the first switch tube 121 (such as on or off), but refers to maintaining a period of time in the on state and then switching to the off state, or maintaining a period of time in the off state and then switching to the on state. Therefore, this process can be regarded as the state in which the first switch tube 121 maintains the amplification mode for a certain period of time.

[0047] In some embodiments, the chord tone control circuit unit 13 controls the first switch tube 121 to be turned on or off to maintain the amplification state for a preset time period, which may involve controlling the charging and discharging rate of the capacitor, thereby affecting the working state of the first switch tube 121. When the charging or discharging rate of the capacitor is controlled, the on or off time of the first switch tube 121 can be precisely controlled, thereby achieving the effect of the buzzer generating chord tones.

[0048] In some embodiments, the rate of charging and discharging of the capacitor is closely related to the design of the chord tone control circuit unit 13. Therefore, the hardware structure of the chord tone control circuit unit 13 directly affects the duration of the chord tone generated by the buzzer 20. By selecting various components in the chord tone control circuit unit 13, the preset duration of the first switch tube 121 being turned on or off can be controlled, that is, the duration of the chord tone generated by the buzzer 20 can be accurately controlled by selecting hardware components to achieve the desired chord tone effect.

[0049] According to the driving circuit 10 of the utility model, by adjusting the parameters of the components such as the resistor and the switch tube in the circuit, the output frequency of the tone adjustment circuit module 11 can be accurately controlled by the control unit 30, thereby affecting the tone of the sound emitted by the buzzer 20, and by controlling the first switch tube 121 to switch between the off and on states, and controlling the preset power supply to power the buzzer 20, the generation of chord sound can be achieved. In addition, the chord sound control circuit unit 13 can control the first switch tube 121 to maintain a preset time length when it is turned on or off by controlling the charging and discharging of the capacitor. Amplification state, so that the buzzer 20 produces chord sound, therefore, through the coordinated action of the tone adjustment circuit module 11, the chord sound generating circuit module 12 and the chord sound control circuit unit 13, the driving circuit 10 of the utility model realizes the precise control of the tone and chord sound generation of the buzzer 20, which solves the problem of small chord sound volume and instantaneous maximum volume in the prior art, improves the sound effect performance ability of the buzzer 20, and such a design provides a more flexible and adjustable tone effect, so that the buzzer 20 can adapt to different music needs and usage scenarios.

[0050] like Figure 1 As shown, the chord tone control circuit unit 13 includes: a first charging and discharging electronic unit 131 , a second switch tube 132 and a third charging and discharging electronic unit 133 .

[0051] In some embodiments, the first charge-discharge electronic unit 131 may be an RC (resistance-capacitance) circuit, which is used to control the charging and discharging process of the capacitor according to the change of the chord tone enable signal (EN). The first end of the first charge-discharge electronic unit 131 is suitable for receiving the chord tone enable signal, and the second end of the first charge-discharge electronic unit 131 is grounded, and is used to charge when the chord tone enable signal is a first enable signal, and discharge when the chord tone enable signal is a second enable signal.

[0052] In some embodiments, the chord tone enable signal can be used to control the tone playback duration of the buzzer 20. It can be a signal from the external control unit 30 or a signal generated by an internal circuit. The first enable signal can refer to the signal state when the chord tone enable signal is in a high potential state. When the chord tone enable signal is in a high potential state, the first charge and discharge electronic unit 131 starts charging. The second enable signal can refer to the signal state when the chord tone enable signal is in a low potential state. When the chord tone enable signal is in a low potential state, the first charge and discharge electronic unit 131 starts discharging. Such a charging and discharging process controls the operating state of the subsequent circuit, thereby affecting the duration of the tone playback of the buzzer 20.

[0053] In some embodiments, the second switch tube 132 can be a field effect transistor such as a MOSFET, and the second switch tube 132 can adjust its on or off state according to the change of the control signal. The control end of the second switch tube 132 is connected to the third end of the first charge and discharge electronic unit 131, and the first end of the second switch tube 132 is grounded. The second switch tube 132 is used to gradually turn on according to the charging state when the first charge and discharge electronic unit 131 is charging, and gradually turn off when the first charge and discharge electronic unit 131 is discharging.

[0054] Specifically, when the first charge-discharge electronic unit 131 is in a charging state, the voltage gradually increases, causing the gate voltage of the second switch tube 132 to gradually reach its conduction threshold, thereby gradually turning on the second switch tube 132. When the first charge-discharge electronic unit 131 is in a discharging state, the voltage gradually decreases, causing the gate voltage of the second switch tube 132 to gradually be lower than its conduction threshold, thereby gradually turning off the second switch tube 132.

[0055] In some embodiments, the second charge-discharge electronic unit 133 may be another RC (resistance-capacitance) circuit in the string sound duration adjustment circuit unit. The first end of the second charge-discharge electronic unit 133 is connected to the second end of the second switch tube 132, the second end of the second charge-discharge electronic unit 133 is connected to a preset power supply, the third end of the second charge-discharge electronic unit 133 is connected to the control end of the first switch tube 121, and the fourth end of the second charge-discharge electronic unit 133 is grounded, which is used to discharge when the second opening tube is turned on, and to charge when the second switch tube 132 is turned off. Therefore, such a charging and discharging process is controlled by the state of the first switch tube 121, and then affected by the change of the chord tone enable signal.

[0056] Specifically, when the chord tone enable signal is the first enable signal, the first charge-discharge electronic unit 131 starts to charge, causing the second switch tube 132 to gradually turn on, so that the second charge-discharge electronic unit 133 discharges. When the chord tone enable signal is the second enable signal, the first charge-discharge electronic unit 131 starts to discharge, causing the second switch tube 132 to turn off, so that the second charge-discharge electronic unit 133 starts to charge. In this process, by controlling the conduction and closing of the second switch tube 132, the control of the charge and discharge process of the second charge-discharge electronic unit 133 is achieved, thereby achieving the adjustment of the playback time of the chord tone.

[0057] In some embodiments, the chord tone may refer to a time period in which the volume gradually changes when a certain tone starts to be played and ends to be played. Figure 2 Schematic diagram of a buzzer sound volume change curve according to an embodiment of the utility model, such as Figure 2 As shown, the first stage is the time period when the buzzer does not play any sound, the second stage is when the buzzer receives the chord tone enable signal EN, the buzzer plays a rising chord tone, the third stage is the time period when the buzzer plays the sound normally, and the fourth stage is when the chord tone enable signal EN is disabled, the buzzer plays a falling chord tone. Therefore, the chord tone control circuit unit 13 can accurately control each component in the circuit according to the state of the input enable signal, thereby realizing the control of the buzzer 20 to generate chord tone.

[0058] like Figure 1 As shown, the first charge-discharge electronic unit 131 includes: a first diode 1311 and a first capacitor 1312. The first diode 1311 can be a common signal diode, such as a commonly used silicon diode or a fast recovery diode. These diodes have fast response and low conduction voltage drop, and the chord tone when rising and the chord tone when falling can be configured through different electronic components, so that the duration of the chord tone when rising and falling is different.

[0059] In some embodiments, the cathode of the first diode 1311 is suitable for connecting to the control unit 30 of the buzzer 20 to receive a chord tone enable signal. The purpose of receiving the chord tone enable signal is to control the working state of subsequent circuit elements. When the chord tone enable signal is a first enable signal, the first capacitor 1312 starts to charge. When the chord tone enable signal is a second enable signal, the first capacitor 1312 starts to discharge. Such changes affect the working state of subsequent circuit elements, thereby controlling the buzzer 20 to generate chord tones.

[0060] In some embodiments, the first capacitor 1312 can store charge and adjust the voltage and current in the circuit. The first end of the first capacitor 1312 is connected to the anode of the first diode 1311 and the control end of the second switch tube 132, respectively, and the second end of the first capacitor 1312 is grounded. The purpose of this connection design is to increase the duration of the chord tone.

[0061] In some embodiments, Figure 1 As shown, the first charge and discharge electronic unit 131 also includes: a first resistor 1313, a second resistor 1314 and a third resistor 1315. Among them, the first end of the first resistor 1313 is suitable for connecting to the control unit 30 of the buzzer 20, and the second end of the first resistor 1313 is connected to the cathode of the first diode 1311. The function of the first resistor 1313 is to limit and adjust the current of the signal transmitted to the cathode of the first diode 1311. By adjusting the resistance value of the first resistor 1313, the amplitude of the signal can be controlled and adjusted, thereby affecting the working state of the subsequent components.

[0062] In some embodiments, the first end of the second resistor 1314 is connected to the second end of the first resistor 1313 and the cathode of the first diode 1311, and the second end of the second resistor 1314 is connected to the anode of the first diode 1311, the first end of the first capacitor 1312, and the control end of the second switch tube 132. The second resistor 1314 can be used to limit current, adjust voltage distribution, etc. in the control and regulation circuit to ensure that subsequent components work normally. It can adjust the current and voltage in the circuit to make the working state of the circuit more stable and reliable.

[0063] In some embodiments, a first end of the third resistor 1315 is connected to a second end of the second resistor 1314, an anode of the first diode 1311, a first end of the first capacitor 1312, and a control end of the second switch tube 132, and a second end of the third resistor 1315 is grounded. The third resistor 1315 is used to distribute current and adjust voltage in the circuit to stabilize and control the working state of the circuit.

[0064] In general, the existence and connection of these resistors are to achieve precise control of the duration and frequency of the chord sound produced by the buzzer 20 in the driving circuit 10, ensuring that the current and voltage in the circuit remain within a suitable range, thereby ensuring the normal operation of the entire circuit.

[0065] like Figure 1As shown, the second charge and discharge electronic unit 133 includes a second capacitor 1331. Among them, the first end of the second capacitor 1331 is suitable for connecting to a preset power supply, a control end of the first switch tube 121 and a second end of the second switch tube 132 to receive a control signal. The second end of the second capacitor 1331 is grounded to ensure the balance of charge and the stability of the circuit. The role of the second capacitor 1331 here is to store charge and release the charge when necessary to control the working state of the first switch tube 121. By adjusting the capacity of the second capacitor 1331, the response speed and stability of the circuit can be affected, thereby achieving precise control of the buzzer 20.

[0066] Specifically, when the second switch tube 132 is gradually turned on, the second capacitor 1331 is discharged through the second switch tube 132, causing the gate voltage of the first switch tube 121 to gradually decrease, and the first switch tube 121 is turned on. In this process, the first switch tube 121 will be in an amplified state for a short time (about 100ms). When the second switch tube 132 is turned off, the second capacitor 1331 is gradually charged through the resistor, so that the gate voltage of the first switch tube 121 is gradually increased, causing the first switch tube 121 to be turned off. In this process, the first switch tube 121 will also be in an amplified state for a short time (about 100ms). Therefore, the charging and discharging process of the second capacitor 1331 affects the working state of the first switch tube 121 and the second switch tube 132, and then affects the working state of the buzzer 20, thereby realizing the adjustment of the tone playing duration and frequency of the chord sound emitted by the buzzer 20.

[0067] In some embodiments, when the first switch tube 121 is in the amplified state, the buzzer 20 will experience a voltage change, thereby generating a chord sound. By selecting the first capacitor 1312, the tone playing time of the chord sound when the first switch tube 121 and the second switch tube 132 are turned on can be adjusted. By selecting the second capacitor 1331, the tone playing time of the chord sound when the first switch tube 121 and the second switch tube 132 are turned off can be adjusted.

[0068] In some embodiments, the capacity of the second capacitor 1331 can be selected according to the requirements of the buzzer 20 and the design of the driving circuit 10. A larger capacity can lead to a longer charging and discharging time, thereby affecting the duration of the sound of the buzzer 20. A smaller capacity may lead to a faster response speed. Therefore, when designing the driving circuit 10, it is necessary to select a suitable capacity of the second capacitor 1331 according to specific application requirements and performance requirements.

[0069] like Figure 1As shown, the second charge and discharge electronic unit 133 also includes: a fourth resistor 1332 and a fifth resistor 1333. Among them, the first end of the fourth resistor 1332 is connected to the second end of the second switch tube 132, and the second end of the fourth resistor 1332 is connected to the first end of the second capacitor 1331 and the control end of the first switch tube 121. The function of the fourth resistor 1332 is to limit the flow of current, affect the charging and discharging process of the second capacitor 1331, and thus indirectly adjust the working state of the first switch tube 121. By adjusting the resistance value of the fourth resistor 1332, the charging and discharging rate of the second capacitor 1331 can be affected, thereby affecting the duration and frequency of the sound of the buzzer 20.

[0070] In some embodiments, the first end of the fifth resistor 1333 is connected to a preset power supply, and the second end of the fifth resistor 1333 is connected to the second end of the fourth resistor 1332, the control end of the first switch tube 121, and the first end of the second capacitor 1331. The function of the fifth resistor 1333 is to limit the flow of current and provide a stable voltage to the first switch tube 121 and the second capacitor 1331. When the second capacitor 1331 needs to be charged, the fifth resistor 1333 can limit the flow of current, so that the charging process of the capacitor is more stable and slow. This can ensure that the process of capacitor charging is gradual and progressive, rather than sudden or too fast. This design can ensure the stability of the circuit and avoid sudden voltage changes or current surges. By adjusting the resistance value of the fifth resistor 1333, the charging rate of the second capacitor 1331 can be controlled, thereby affecting the sounding duration and frequency of the buzzer 20.

[0071] In some embodiments, the values ​​of the fourth resistor 1332 and the fifth resistor 1333 can be selected according to the requirements of the buzzer 20 and the design of the driving circuit 10. Different resistance values ​​can affect the response speed and stability of the circuit and the working state of the buzzer 20.

[0072] In some embodiments, a sixth resistor 15 is further provided between the first end of the first switch tube 121 and the second end of the buzzer 20. The sixth resistor 15 can play a protective role to a certain extent, preventing excessive current from damaging the function of the buzzer 20. By limiting the flow of current, the sixth resistor 15 can ensure operation within a normal operating range and avoid overloading and damage to the buzzer 20.

[0073] In some embodiments, the resistance of the sixth resistor 15 can be selected according to the requirements of the buzzer 20 and the design of the driving circuit 10. A smaller resistance can cause a larger current to flow through the buzzer 20, while a larger resistance can limit the current. Therefore, when designing the driving circuit 10, it is necessary to select a suitable resistance of the sixth resistor 15 according to the specific application requirements and the characteristics of the buzzer 20.

[0074] like Figure 1 As shown, the tone adjustment circuit module 11 includes a third switch tube 110. The third switch tube 110 can be a field effect transistor (such as a MOSFET), and its function is to adjust its on-off state according to the change of the driving signal, so as to control the working state of the buzzer 20. The control end of the third switch tube 110 is suitable for connecting to the control unit 30 of the buzzer 20 to receive the driving signal, and the first end of the third switch tube 110 is connected to the first end of the buzzer 20, so that the third switch tube 110 can directly control the working state of the buzzer 20. The second end of the third switch tube 110 is grounded, which helps to maintain the level balance and stability of the circuit.

[0075] Specifically, when the control unit 30 of the buzzer 20 sends different driving signals to the third switch tube 110, the working state of the third switch tube 110 can be adjusted accordingly. By controlling the conduction and cutoff of the third switch tube 110, the working state of the buzzer 20 can be changed, thereby adjusting the pitch and achieving precise control of the buzzer 20. This design allows the user to adjust the pitch of the sound generated by the buzzer 20 as needed, thereby increasing the flexibility of the drive circuit 10.

[0076] like Figure 1 As shown, the tone adjustment circuit module 11 also includes: a seventh resistor 1111 and an eighth resistor 112. Among them, the first end of the seventh resistor 1111 is connected to the control unit 30 of the buzzer 20, and the second end of the seventh resistor 1111 is connected to the control end of the third switch tube 110. This connection mode enables the seventh resistor 1111 to adjust the working state of the third switch tube 110, thereby affecting the working state of the buzzer 20. The seventh resistor 1111 plays an important role in adjusting the tone. It can adjust the resistance voltage division of the control signal according to the requirements of the control unit 30, thereby affecting the working state of the third switch tube 110.

[0077] In some embodiments, a first end of the eighth resistor 112 is connected to a second end of the seventh resistor 1111 and a control end of the third switch tube 110, and a second end of the eighth resistor 112 is grounded. The eighth resistor 112 is used to ensure the stability and safety of the circuit, and can provide additional resistance to adjust the voltage of the control end of the third switch tube 110, so that the third switch tube 110 works more reliably and stably.

[0078] In some embodiments, the driving circuit 10 further includes a filtering module 14. The filtering module 14 can be used to process the power supply in the circuit to ensure a stable power supply and reduce noise interference. In the driving circuit 10, the first end of the filtering module 14 is connected to a preset power supply, so that current can be directly obtained from the preset power supply. The second end of the filtering module 14 is grounded, which helps to filter out high-frequency noise and interference signals in the power supply, ensure the stability and purity of the power supply signal, and thus provide a reliable power supply to the entire circuit.

[0079] In some embodiments, the filter module 14 can be in various forms, such as capacitor filtering, inductor filtering, and combined filtering of capacitors and inductors. These filters can achieve the effect of filtering out noise and interference in different frequency ranges by selecting appropriate component parameters, such as capacitance value, inductance value, and frequency response. At the same time, the design of the filter module 14 also needs to take into account factors such as circuit power consumption and space limitations to ensure the performance and stability of the entire drive circuit 10.

[0080] In the driving circuit 10 of the present utility model, as Figure 1 As shown, the filtering module 14 includes: a third capacitor 141 and a fourth capacitor 142. The third capacitor 141 and the fourth capacitor 142 are used to perform filtering to ensure that the current provided from the preset power supply to the driving circuit 10 is stable and clear. The two capacitors can work together to smooth the current fluctuations in the preset power supply by storing and releasing charges.

[0081] In some embodiments, the first ends of the third capacitor 141 and the fourth capacitor 142 are respectively connected to a preset power source to receive current. In this way, they can act as energy storage devices to stabilize the current provided by the preset power source by absorbing and releasing charge. The second ends of the third capacitor 141 and the fourth capacitor 142 are grounded, which helps to guide stray signals and noise in the circuit to the ground, thereby maintaining the stability and reliability of the circuit.

[0082] In some embodiments, the selection of the third capacitor 141 and the fourth capacitor 142 may take into account factors such as the power consumption of the circuit, the power supply noise level, and the stability requirements. Generally, a capacitor with a larger capacity can provide a better filtering effect, but it will also increase the cost and occupy space. Therefore, when designing the driving circuit 10, it is necessary to select a suitable capacitor capacity according to the specific application scenario and performance requirements.

[0083] like Figure 1As shown, the driving circuit 10 also includes a second diode 16, which is connected to the buzzer 20 to control the flow direction of the current. The anode of the second diode 16 is connected to the first end of the buzzer 20, and the cathode of the second diode 16 is connected to the second end of the buzzer 20. When the buzzer 20 generates current, the second diode 16 ensures that the current can only flow from the first end of the buzzer 20 to the second end, and cannot flow in the opposite direction. Through this connection method, the second diode 16 can effectively protect the driving circuit 10 and the buzzer 20 from the reverse effect of the voltage, preventing damage or interference caused thereby.

[0084] In practical applications, the second diode 16 is usually selected to have a higher rated reverse voltage and a larger rated reverse current to ensure that the circuit components can be effectively protected. In addition, the selection of the second diode 16 also needs to consider its reverse leakage current, forward voltage drop and other parameters to meet the requirements of circuit design.

[0085] Reference below Figure 3 The reminder device according to the embodiment of the utility model is described.

[0086] Figure 3 is a block diagram of a reminder device according to an embodiment of the present utility model, such as Figure 3 As shown, the reminder device 1 includes: a buzzer 20, a driving circuit 10 and a control unit.

[0087] In some embodiments, the buzzer 20 can be an electronic sound device for making sounds to remind or warn the user. It can be composed of a diaphragm, an oscillator, and a vibration chamber, and when energy is transmitted by electric current, the diaphragm can vibrate and generate sound.

[0088] In some embodiments, the driving circuit 10 is responsible for controlling the working state of the buzzer 20 to produce the desired sound effect. The driving circuit 10 includes various components, such as diodes, capacitors, resistors, switches, etc., which are used to adjust current and voltage to control parameters such as the sound frequency and tone playing time of the buzzer 20.

[0089] In some embodiments, the control unit is the control center of the reminder device 1, which is connected to the driving circuit 10 and is responsible for generating and sending the driving signal and the chord tone enable signal to the driving circuit 10. The driving signal is a signal that controls the operation of the buzzer 20, and different signals are sent as needed to trigger the sound of the buzzer 20. The chord tone enable signal is used to adjust the working mode of the reminder device 1 or produce a specific chord tone effect.

[0090] In some embodiments, the control unit can be a microcontroller, a single-chip microcomputer or other control chip, and the program controls the driving circuit 10 to send appropriate signals to realize the reminder function. For example, according to the time setting or external event trigger, a driving signal can be sent to control the buzzer 20 to sound, and the buzzer 20 can be controlled to produce different sound modes or tones through the chord tone enable signal. In addition, the control unit can also communicate with other devices or systems to realize intelligent reminder functions, such as integration with mobile phone applications or smart home systems to realize remote monitoring and control. Such a design can make the reminder device 1 have more flexible and diversified reminder methods to meet the use requirements of different scenarios and needs.

[0091] According to the reminder device 1 of the utility model, the control unit realizes precise control of the tone adjustment circuit module 11, the chord tone generation circuit module 12 and the chord tone control circuit unit 13 by sending the driving signal of the buzzer 20 and the chord tone enable signal to the driving circuit 10, effectively solving the problems of low chord tone volume and instantaneous maximum volume in the prior art, improving the sound effect performance capability of the buzzer 20, and enabling the buzzer 20 to provide more flexible and diversified audio effects to meet different scenarios and user needs.

[0092] Reference below Figure 4 A beauty device according to an embodiment of the present invention is described.

[0093] Figure 4 is a block diagram of a beauty device according to an embodiment of the present utility model, such as Figure 4 As shown, the beauty device 100 includes the reminder device 1 described in the above embodiment.

[0094] In some embodiments, the beauty device 100 can be any device used for beauty care or beauty maintenance, such as a beauty instrument, a massager, a cleaning instrument, etc. Its functions can cover skin care, facial massage, beauty care, etc., aiming to help users maintain or improve the health and beauty of their skin.

[0095] In some embodiments, the beauty device 100 is integrated with a reminder device 1, which can play a variety of roles when the user performs beauty care, such as time reminder. When the user uses the beauty device 100, the reminder device 1 can issue a sound prompt to remind the user to end or switch operations. For example, function reminders. According to different beauty modes or functions, the reminder device 1 can issue different sound prompts to help the user confirm the function or operation currently being used. Another example is an error reminder. If the user operates improperly or the device fails, the reminder device 1 can issue an alarm to remind the user to stop operating or check the device.

[0096] According to the beauty device 100 of the utility model, by adopting the reminder device 1 described in the above embodiment, it is possible to achieve precise control of the tone and chord sound generation of the buzzer 20, solve the problems of low chord sound volume and instantaneous volume reaching the maximum value in the prior art, improve the sound effect performance capability of the buzzer 20, and enable the beauty device 100 to provide more flexible and diverse audio effects during use to meet the personalized needs of users, thereby enhancing the user experience of the beauty device 100.

[0097] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0098] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A driving circuit, characterized in that: Used to drive a buzzer, the driving circuit comprises: A tone adjustment circuit module, the tone adjustment circuit module is connected to the first end of the buzzer and is used to adjust the tone of the buzzer; A chord tone generating circuit module, wherein the chord tone generating circuit module is connected to the second end of the buzzer; The chord tone generating circuit module comprises: A first switch tube, wherein a first end of the first switch tube is connected to a second end of the buzzer, and a second end of the first switch tube is connected to a preset power supply; A chord sound control circuit unit is connected to the control end of the first switch tube and is used to control the first switch tube to maintain an amplification state of a preset time length when it is turned on or off, so that the buzzer produces a chord sound.

2. The driving circuit according to claim 1, characterized in that: The chord tone control circuit unit comprises: a first charging and discharging electronic unit, wherein a first end of the first charging and discharging electronic unit is adapted to receive a chord tone enable signal, a second end of the first charging and discharging electronic unit is grounded, and is used for charging when the chord tone enable signal is a first enable signal, and discharging when the chord tone enable signal is a second enable signal; a second switch tube, wherein the control end of the second switch tube is connected to the third end of the first charge-discharge electronic unit, the first end of the second switch tube is grounded, and the second switch tube is used to gradually turn on according to the charging state when the first charge-discharge electronic unit is charging and to turn off when the first charge-discharge electronic unit is discharging; A second charging and discharging electronic unit, wherein a first end of the second charging and discharging electronic unit is connected to a second end of the second switch tube, a second end of the second charging and discharging electronic unit is connected to a preset power supply, a third end of the second charging and discharging electronic unit is connected to a control end of the first switch tube, and a fourth end of the second charging and discharging electronic unit is grounded, for discharging when the second switch tube is turned on, and charging when the second switch tube is turned off.

3. The driving circuit according to claim 2, characterized in that: The first charging and discharging electronic unit comprises: a first diode, wherein a cathode of the first diode is adapted to be connected to a control unit of the buzzer to receive the chord tone enabling signal; A first capacitor, wherein a first end of the first capacitor is connected to the anode of the first diode and the control end of the second switch tube respectively, and a second end of the first capacitor is grounded.

4. The driving circuit according to claim 3, characterized in that: The first charge-discharge electronic unit further includes: a first resistor, wherein a first end of the first resistor is suitable for being connected to a control unit of the buzzer, and a second end of the first resistor is connected to a cathode of the first diode; a second resistor, wherein a first end of the second resistor is connected to a second end of the first resistor and a cathode of the first diode, and a second end of the second resistor is connected to an anode of the first diode, a first end of the first capacitor and a control end of the second switch tube; A third resistor, wherein a first end of the third resistor is connected to the second end of the second resistor, the anode of the first diode, the first end of the first capacitor and the control end of the second switch tube, and a second end of the third resistor is grounded.

5. The driving circuit according to claim 2, characterized in that: The second charge-discharge electronic unit comprises: A second capacitor, wherein a first end of the second capacitor is suitable for being connected to the preset power supply, the control end of the first switch tube and the second end of the second switch tube, and a second end of the second capacitor is grounded.

6. The driving circuit according to claim 5, characterized in that: The second charge-discharge electronic unit further includes: a fourth resistor, wherein a first end of the fourth resistor is connected to the second end of the second switch tube, and a second end of the fourth resistor is connected to the first end of the second capacitor and the control end of the first switch tube; A fifth resistor, wherein a first end of the fifth resistor is connected to the preset power supply, and a second end of the fifth resistor is connected to the second end of the fourth resistor, the control end of the first switch tube, and the first end of the second capacitor.

7. The driving circuit according to claim 1, characterized in that: A sixth resistor is further provided between the first end of the first switch tube and the second end of the buzzer.

8. The driving circuit according to claim 1, characterized in that: The tone adjustment circuit module comprises: A third switch tube, wherein the control end of the third switch tube is suitable for being connected to the control unit of the buzzer to receive a driving signal, the first end of the third switch tube is connected to the first end of the buzzer, and the second end of the third switch tube is grounded.

9. The driving circuit according to claim 8, characterized in that: The tone adjustment circuit module also includes: a seventh resistor, wherein a first end of the seventh resistor is connected to the control unit of the buzzer, and a second end of the seventh resistor is connected to the control end of the third switch tube; An eighth resistor, wherein a first end of the eighth resistor is connected to the second end of the seventh resistor and the control end of the third switch tube, and a second end of the eighth resistor is grounded.

10. The driving circuit according to claim 1, characterized in that: The driving circuit further includes: A filter module, wherein a first end of the filter module is connected to the preset power supply, and a second end of the filter module is grounded.

11. The driving circuit according to claim 10, characterized in that: The filtering module comprises: A third capacitor, a first end of the third capacitor is connected to the preset power supply, and a second end of the third capacitor is grounded; A fourth capacitor, wherein a first end of the fourth capacitor is connected to the preset power supply, and a second end of the fourth capacitor is grounded.

12. The driving circuit according to any one of claims 1 to 11, characterized in that: The driving circuit further includes a second diode, an anode of the second diode is connected to the first end of the buzzer, and a cathode of the second diode is connected to the second end of the buzzer.

13. A reminder device, characterized in that: include: buzzer; The driving circuit according to any one of claims 1 to 12, wherein the driving circuit is connected to the buzzer; A control unit is connected to the driving circuit to send a driving signal and a chord tone enabling signal to the buzzer.

14. A beauty device, characterized in that: Includes the reminder device as claimed in claim 13.

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