Mode switching circuit and oral irrigator

Abstract

The utility model discloses a mode switching circuit and an oral irrigator, and relates to the technical field of oral irrigators, the mode switching circuit is applied to the oral irrigator, the oral irrigator comprises a motor, the mode switching circuit comprises a main control circuit, a switching circuit and a driving circuit, the main control circuit is provided with a plurality of preset control signals, and the switching circuit is connected with the motor. Each preset control signal corresponds to a working mode, and the main control circuit is used for outputting one of the plurality of preset control signals; the switching circuit is electrically connected with the main control circuit, the switching circuit is used for generating a corresponding switching signal according to the trigger signal, and the main control circuit switches an output preset control signal according to the switching signal; the driving circuit is electrically connected with the main control circuit and is connected with the motor, and the driving circuit is used for driving the motor according to the control signal, so that the oral irrigator works in a corresponding working mode. The mode switching circuit provided by the utility model aims to improve the use convenience of the oral irrigator.

Description

Technical Field

[0001] The utility model relates to the technical field of oral irrigators, and particularly relates to a mode switching circuit and an oral irrigator. Background Art

[0002] With the improvement of living quality, oral irrigators are more and more popular among users. Oral irrigators mainly use the impact of pulsed water flow to clean teeth and dental floss. Oral irrigators mainly use the impact force of high-speed water jets ejected under a certain pressure to achieve the cleaning effect.

[0003] At present, the adjustable range of the duty cycle of the oral irrigator is small, and the usability is low. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a mode switching circuit and an oral irrigator, aiming to improve the usability of the oral irrigator.

[0005] To achieve the above purpose, the mode switching circuit proposed by the utility model is applied to an oral irrigator. The oral irrigator includes a motor. The mode switching circuit includes:

[0006] A main control circuit having a plurality of preset control signals, each of the preset control signals corresponding to a working mode, and the main control circuit is used to output one of the plurality of preset control signals;

[0007] A switching circuit electrically connected to the main control circuit. The switching circuit is used to generate a corresponding switching signal according to a trigger signal, and the main control circuit switches the preset control signal output according to the switching signal;

[0008] A driving circuit electrically connected to the main control circuit and connected to the motor. The driving circuit is used to drive the motor according to the preset control signal so that the oral irrigator works in the corresponding working mode.

[0009] Optionally, the oral irrigator has a first working mode, a second working mode, and a third working mode. The main control circuit has a first preset PWM value, a second preset PWM value, a third preset PWM value, and corresponding first preset control signal, second preset control signal, and third preset control signal;

[0010] When the main control circuit outputs the first preset control signal, the driving circuit drives the motor to work at the first preset PWM value so that the oral irrigator works in the first working mode;

[0011] When the main control circuit outputs the second preset control signal, the driving circuit drives the motor to work at the second preset PWM value so that the oral irrigator works in the second working mode;

[0012] When the main control circuit outputs a third preset control signal, the drive circuit drives the motor to operate at a third preset PWM value so that the flusher operates in a third operating mode;

[0013] The first preset PWM value corresponds to a first duty cycle, and the second preset PWM value corresponds to a second duty cycle; the third preset PWM value corresponds to a third duty cycle, and the third duty cycle alternates between the first duty cycle and the second duty cycle at a preset frequency.

[0014] Optionally, the switching circuit has a power supply terminal and a plurality of diodes. The number of diodes is the same as the number of preset control signals. One ends of the plurality of diodes are connected to the power supply terminal, and the other ends are connected to the main control circuit.

[0015] Optionally, the dental irrigator has a first operating mode, a second operating mode, and a third operating mode, and the main control circuit has corresponding first control signal, second control signal, and third control signal;

[0016] The main control circuit outputs a corresponding one of the first control signal, the second control signal, and the third control signal according to the trigger signal of the switching circuit so that the dental irrigator operates in a corresponding one of the first operating mode, the second operating mode, and the third operating mode.

[0017] Optionally, the mode switching circuit includes a power supply terminal, and the switching circuit includes a first diode, a second diode, a third diode, a first resistor, a second resistor, and a third resistor;

[0018] The power supply terminal is connected to one ends of the first resistor, the second resistor, and the third resistor; the other end of the first resistor is connected to the anode of the first diode, and the cathode of the first diode is connected to the main control circuit; the other end of the second resistor is connected to the anode of the second diode, and the cathode of the second diode is connected to the main control circuit; the other end of the third resistor is connected to the anode of the third diode, and the cathode of the third diode is connected to the main control circuit;

[0019] When the first diode conducts, the main control circuit generates the first control signal so that the dental irrigator operates in the first operating mode; when the second diode conducts, the main control circuit generates the second control signal so that the dental irrigator operates in the second operating mode; when the third diode conducts, the main control circuit generates the third control signal so that the dental irrigator operates in the third operating mode.

[0020] Optionally, the mode switching circuit further includes a signal trigger circuit for obtaining the trigger signal.

[0021] Optionally, the mode switching circuit includes a power supply terminal; the signal triggering circuit includes a switch control, a switching control, a fourth resistor, and a fifth resistor;

[0022] One end of the fourth resistor and the fifth resistor is connected to the power supply terminal, the other end of the fourth resistor is connected to the switch control and the main control circuit, and the other end of the fifth resistor is connected to the switching control and the main control circuit; the other ends of the switch control and the switching control are grounded together.

[0023] Optionally, the mode switching circuit further includes a filtering circuit.

[0024] Optionally, the mode switching circuit further includes a power supply terminal, and the filtering circuit includes a sixth resistor, a seventh resistor, an eighth resistor, a first capacitor, and a second capacitor;

[0025] One end of the sixth resistor and the seventh resistor is connected to the power supply terminal; the other end of the sixth resistor is connected to the first capacitor and the main control circuit, and the other end of the first capacitor is grounded; the other end of the seventh resistor is connected to the second capacitor, the eighth resistor, and the main control circuit, and the other ends of the second capacitor and the eighth resistor are grounded together.

[0026] The present utility model further provides a dental irrigator, which includes a motor and the mode switching circuit described in any one of the above; the mode switching circuit is used to control the motor so that the dental irrigator operates in a corresponding working mode.

[0027] The technical solution of the present utility model adopts a mode switching circuit. The user inputs an operation instruction into the mode switching circuit in the form of a trigger signal through the switching circuit. When the switching circuit receives the trigger signal, it will generate a corresponding switching signal to cause the main control circuit to switch the preset control signal output. After the preset control signal is transmitted to the driving circuit, the dental irrigator can operate in a corresponding working mode; thus, the user can make the dental irrigator switch modes by applying the operation instruction multiple times. Different modes have different duty cycle regulation ranges. By adding up multiple modes, the adjustable range of the duty cycle of the dental irrigator can be increased, thereby improving the convenience of using the dental irrigator. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0029] Figure 1 Schematic diagram of a structure of an embodiment of the mode switching circuit provided by the present utility model;

[0030] Figure 2 Schematic diagram of a structure of another embodiment of the mode switching circuit provided by the present utility model.

[0031] Explanation of the reference numerals in the drawings:

[0032] 100, mode switching circuit; 1, main control circuit; 2, switching circuit; 3, driving circuit; 4, power supply terminal; 5, signal triggering circuit; 6, filtering circuit.

[0033] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0036] With the improvement of the quality of life, the oral irrigator is more and more popular among users. The oral irrigator mainly uses the way of pulsed water flow impact to clean teeth and dental floss. The oral irrigator mainly uses the impact force of the high-speed water column ejected under a certain pressure to achieve the cleaning effect. At present, the adjustable range of the duty cycle of the oral irrigator is small, and the use convenience is low.

[0037] In order to improve the use convenience of the oral irrigator, the present utility model proposes a mode switching circuit 100, as Figure 1As shown, the mode switching circuit 100 is applied to a dental irrigator, which includes a motor for controlling the water pressure of the dental irrigator, that is, controlling the duty cycle of the dental irrigator. The mode switching circuit 100 includes a main control circuit 1, a switching circuit 2, and a driving circuit 3.

[0038] In this embodiment, the main control circuit 1 has multiple preset control signals, and each preset control signal corresponds to a working mode. The main control circuit 1 is used to output one of the multiple preset control signals. It can be understood that each preset control signal of the main control circuit 1 represents each working mode. When the main control circuit 1 issues a preset control signal, the dental irrigator will work in the corresponding working mode.

[0039] Optionally, the main control circuit 1 is implemented by a main controller, such as an MCU (Microcontroller Unit), a DSP (Digital Signal Process), an FPGA (Field Programmable Gate Array), an SOC (System On Chip), etc.

[0040] In this embodiment, the switching circuit 2 is electrically connected to the main control circuit 1. The switching circuit 2 is used to generate a corresponding switching signal according to a trigger signal, and the main control circuit 1 switches the preset control signal output according to the switching signal. It can be understood that the trigger signal is a signal applied to this circuit, which can be a physical button, a sound sensor, software control, etc. Each time the switching circuit receives this trigger signal, it will generate a corresponding switching signal. The main control circuit 1 receives this switching signal to change the preset control signal output. For example, the dental irrigator has a gentle mode, a standard mode, and a pulse mode. The initial mode is the gentle mode. Receiving a switching signal will switch to the standard mode, receiving another switching signal will switch to the pulse mode, and receiving another switching signal will return to the standard mode for mode switching. Therefore, the mode switching circuit 100 enables the dental irrigator to have multiple working modes, and each working mode has a different duty cycle, thereby increasing the convenience of use of this dental irrigator.

[0041] In this embodiment, the driving circuit 3 is electrically connected to the main control circuit 1 and is connected to the motor. The driving circuit 3 is used to drive the motor according to the preset control signal so that the dental irrigator works in the corresponding working mode.

[0042] Optionally, the driving circuit 3 may further include a protection circuit to ensure the stability of the output power of the dental irrigator or to ensure the safety of the operation of the dental irrigator.

[0043] Specifically, multiple PWM values can be set in the main control circuit 1. Each PWM value corresponds to a water pressure duty ratio, and each preset control signal corresponds to a PWM value, so that the oral irrigator operates at the water pressure duty ratio corresponding to the PWM value. It can be understood that PWM controls the average voltage of the motor by periodically sending high-level and low-level signals. In a complete PWM cycle, the proportion of the duration of the high level is called the duty ratio. If the duty ratio is 50%, it means that the signal is high level in half of the cycle and low level in the other half of the cycle. By changing the duty ratio, the average power of the motor can be changed, thereby controlling the water pressure of the oral irrigator. Therefore, PWM is used in the oral irrigator to control the pressure and flow of the water column. For example, the low water pressure mode may correspond to a lower PWM duty ratio, generating a weaker water flow; the standard water pressure mode may correspond to a medium PWM duty ratio, providing a moderate water flow; the pulsed water pressure mode can correspond to the alternating switching of a lower PWM duty ratio and a medium PWM duty ratio. In this way, when the user sends a mode switching command to the main control circuit 1 through the operation interface, the main control circuit 1 will select a suitable PWM value from the preset PWM value list according to the user's selection, and then convert it into an actual motor control signal through the drive circuit 3. In this way, the rotation speed and water pressure of the motor will be adjusted to the level matching the selected mode, thus realizing the seamless switching of the working mode of the oral irrigator.

[0044] In summary, the technical solution of the present utility model adopts the mode switching circuit 100. The user inputs an operation instruction into the mode switching circuit 100 in the form of a trigger signal through the switching circuit 2. When the switching circuit 2 receives the trigger signal, it will generate a corresponding switching signal to cause the main control circuit 1 to switch the output preset control signal. After the preset control signal is transmitted to the drive circuit 3, the oral irrigator can operate in the corresponding working mode; in this way, the user can make the oral irrigator switch modes by applying the operation instruction multiple times. Different modes have different duty ratio regulation ranges. By accumulating multiple modes, the adjustable range of the duty ratio of the oral irrigator can be increased, thereby improving the convenience of using the oral irrigator.

[0045] In this embodiment, the oral irrigator has a first working mode, a second working mode, and a third working mode. The main control circuit 1 has a first preset PWM value, a second preset PWM value, a third preset PWM value, and corresponding first preset control signals, second preset control signals, and third preset control signals. When the main control circuit 1 outputs the first preset control signal, the drive circuit 3 drives the motor to work at the first preset PWM value, so that the oral irrigator works in the first working mode. When the main control circuit 1 outputs the second preset control signal, the drive circuit 3 drives the motor to work at the second preset PWM value, so that the oral irrigator works in the second working mode. When the main control circuit 1 outputs the third preset control signal, the drive circuit 3 drives the motor to work at the third preset PWM value, so that the oral irrigator works in the third working mode. The first preset PWM value corresponds to a first duty cycle, the second preset PWM value corresponds to a second duty cycle, and the third preset PWM value corresponds to a third duty cycle. The third duty cycle alternates between the first duty cycle and the second duty cycle at a preset frequency.

[0046] Optionally, the first working mode is the standard mode, the second working mode is the gentle mode, and the third working mode is the pulse mode.

[0047] Optionally, in the first working mode (standard mode), it corresponds to the first preset PWM value. The voltage and duty cycle are in the first gear, corresponding as follows: 4.2V voltage corresponds to 72.8% duty cycle; 4.1V voltage corresponds to 73.8% duty cycle; 4V voltage corresponds to 74.8% duty cycle; 3.9V voltage corresponds to 76.5% duty cycle; 3.8V voltage corresponds to 78.8% duty cycle; 3.7V voltage corresponds to 79.8% duty cycle; 3.6V voltage corresponds to 81% duty cycle; 3.5V voltage corresponds to 82.4% duty cycle; 3.4V voltage corresponds to 83.4% duty cycle; 3.3V voltage corresponds to 85.2% duty cycle; 3.2V voltage corresponds to 87.5% duty cycle; 3.1V voltage corresponds to 99.8% duty cycle; 3V or lower voltage corresponds to 100% duty cycle.

[0048] Optionally, in the second working mode (gentle mode), it corresponds to the second preset PWM value; the voltage and duty cycle have two gears, corresponding as follows: 4.2V voltage corresponds to 56% duty cycle; 4.1V voltage corresponds to 57.4% duty cycle; 4V voltage corresponds to 59% duty cycle; 3.9V voltage corresponds to 60.6% duty cycle; 3.8V voltage corresponds to 61.5% duty cycle; 3.7V voltage corresponds to 63% duty cycle; 3.6V voltage corresponds to 64% duty cycle; 3.5V voltage corresponds to 65% duty cycle; 3.4V voltage corresponds to 66.5% duty cycle; 3.3V voltage corresponds to 68.5% duty cycle; 3.2V voltage corresponds to 70.8% duty cycle; 3.1V voltage corresponds to 73% duty cycle; 3V voltage corresponds to 75% duty cycle; 2.9V voltage corresponds to 76.8% duty cycle.

[0049] Optionally, in the third working mode (pulse mode), it corresponds to the third preset PWM value; the voltage and duty cycle have three gears, and the three gears continuously switch between the above-mentioned first gear and second gear, for example, switching back and forth twice within one second, and the number of times is not limited here. That is, for example, when working at 3.5V voltage, the duty cycle of the oral irrigator switches back and forth between 82.4% and 65% within a certain period of time, which can be a transient switch (directly switching from 82.4% to 65%), or a gradually continuous switch (starting from 82.4% and continuously decreasing until 65%; or starting from 65% and continuously increasing until 82.4%).

[0050] It should be explained that the above working modes are only the solutions adopted in this embodiment. In other embodiments, there may also be more than or less than three working modes, or more than or less than three preset PWM values.

[0051] Optionally, the switching circuit 2 has a power supply terminal 4 and a plurality of diodes. The number of the diodes is the same as the number of the preset control signals. One ends of the plurality of diodes are connected to the power supply terminal 4, and the other ends are connected to the main control circuit 1.

[0052] It can be understood that each diode corresponds to a working mode. In the switching circuit 2, one end (anode) of multiple diodes is connected to the power supply terminal 4, while the other end (cathode) is connected to different input ports of the main control circuit 1. Each diode represents a preset control signal, that is, a specific working mode. Specifically, the user selects different working modes by operating a certain user interface (such as a button, a touch screen or a knob). When the user selects a mode, it is actually closing a related switch or contact, which guides the current to the diode associated with the selected mode. When the switch corresponding to the mode selected by the user is closed, the current starts to flow from the power supply terminal 4 to the diode of that mode; due to the characteristics of the diode, only the diode corresponding to the selected mode will be turned on, while the other unselected diodes remain off because they do not have enough forward voltage. Once the diode of the selected mode is turned on, the current will pass through the diode to the corresponding input port of the main control circuit 1. The main control circuit 1 detects the signal change on this input port, analyzes the working mode selected by the user, and thus issues a signal corresponding to this working mode among multiple preset control signals and outputs it to the drive circuit 3, so as to drive the motor to operate according to the requirements of the selected mode. In this way, the diode realizes the signal conversion from the working mode selected by the user to the main control circuit 1, and then completes the switching of the working mode of the dental irrigator. The design is simple and effective, which can ensure that only one working mode is activated each time, avoid signal conflicts, and at the same time provide clear operation feedback.

[0053] In this embodiment, the dental irrigator has a first working mode, a second working mode and a third working mode, and the main control circuit 1 has corresponding first control signal, second control signal and third control signal; the main control circuit 1 outputs a corresponding one of the first control signal, the second control signal and the third control signal according to the trigger signal of the switching circuit 2, so that the dental irrigator works in a corresponding one of the first working mode, the second working mode and the third working mode. In this way, through the intelligent control of the main control circuit 1 and the user interaction of the switching circuit 2, the dental irrigator can flexibly switch between multiple working modes to meet the cleaning needs of different users in different situations.

[0054] In this embodiment, as Figure 2As shown, the mode switching circuit 100 includes a power supply terminal 4, and the switching circuit 2 includes a first diode, a second diode Q2, a third diode Q3, a first resistor R1, a second resistor R2, and a third resistor R3; the power supply terminal 4 is connected to one ends of the first resistor R1, the second resistor R2, and the third resistor R3; the other end of the first resistor R1 is connected to the anode of the first diode Q1, and the cathode of the first diode Q1 is connected to the main control circuit 1; the other end of the second resistor R2 is connected to the anode of the second diode Q2, and the cathode of the second diode Q2 is connected to the main control circuit 1; the other end of the third resistor R3 is connected to the anode of the third diode Q3, and the cathode of the third diode Q3 is connected to the main control circuit 1; when the first diode Q1 is turned on, the main control circuit 1 generates the first control signal to make the oral irrigator operate in the first working mode; when the second diode Q2 is turned on, the main control circuit 1 generates the second control signal to make the oral irrigator operate in the second working mode; when the third diode Q3 is turned on, the main control circuit 1 generates the third control signal to make the oral irrigator operate in the third working mode.

[0055] It should be noted that the first resistor R1, the second resistor R2, and the third resistor R3 are between the power supply and the corresponding diodes. Their main function is to limit the current to prevent excessive current from damaging the diodes or the main control circuit 1. At the same time, they also affect the conduction conditions of the diodes, ensuring that only when the correct voltage is applied, a specific diode will conduct. The first diode Q1, the second diode Q2, and the third diode Q3 have unidirectional conductivity, which means that current can only flow from the anode to the cathode. Each diode is respectively connected to different input terminals of the main control circuit 1. When the diode is turned on, the main control circuit 1 will detect a signal, thereby identifying the mode selected by the user.

[0056] The working principle of the switching circuit 2: When the user selects a working mode in a certain way (such as a physical button or a touch screen), the corresponding part in the circuit will be activated. For example, if the user selects the first working mode, then the path related to the first diode Q1 in the circuit will be activated. The power supply reaches the anode of the first diode Q1 through the first resistor R1 and then reaches the corresponding input terminal of the main control circuit 1. At this time, the corresponding input port of the main control circuit 1 detects the conduction signal from the first diode Q1 and generates the first control signal, which will start the first working mode of the oral irrigator. The same logic applies to the second diode Q2 and the third diode Q3. That is, when the first diode Q1 is turned on, the main control circuit 1 generates the first control signal, and the oral irrigator operates in the first working mode. When the second diode Q2 is turned on, the main control circuit 1 generates the second control signal, and the oral irrigator operates in the second working mode. When the third diode Q3 is turned on, the main control circuit 1 generates the third control signal, and the oral irrigator operates in the third working mode.

[0057] In this embodiment, as Figure 2 shown, the mode switching circuit 100 further includes a signal triggering circuit 5, and the signal triggering circuit 5 is used to obtain the triggering signal, so as to ensure that the main control circuit 1 can accurately receive and execute the user's instructions, thereby providing the required cleaning mode.

[0058] Optionally, the mode switching circuit 100 includes a power supply terminal 4; the signal triggering circuit 5 includes a switch control S1, a switching control S2, a fourth resistor R4, and a fifth resistor R5; one end of the fourth resistor R4 and the fifth resistor R5 is connected to the power supply terminal 4, the other end of the fourth resistor R4 is connected to the switch control S1 and the main control circuit 1, and the other end of the fifth resistor R5 is connected to the switching control S2 and the main control circuit 1; the other ends of the switch control S1 and the switching control S2 are grounded together.

[0059] It can be understood that the switch button is used to initialize or reset the system, corresponding to the on / off function of the oral irrigator. The switching button is used to select between different working modes, which may be a rotary switch, a toggle switch, or a part of a touch panel. The fourth resistor R4 and the fifth resistor R5 are connected between the power supply terminal 4 and the switch button, playing a current limiting role to protect the circuit from overcurrent, and at the same time ensuring that the switch button can provide a stable low-impedance path when closed.

[0060] The working principle of the signal triggering circuit 5: When the switch button is pressed, a path is formed from the power supply terminal 4 through the fourth resistor R4 to the ground. This causes the main control circuit 1 to receive a signal indicating that the oral irrigator should be started or turned off. Similarly, when the switching button is operated, it forms a path from the power supply terminal 4 through the fifth resistor R5 to the ground. This sends a different signal to the main control circuit 1, indicating that the oral irrigator should switch to another working mode. In this way, the user can select between predefined working modes, such as a pulse mode, a strong mode, or a gentle mode, etc., to adapt to personal oral health needs or preferences.

[0061] In this embodiment, as Figure 2 shown, the mode switching circuit 100 further includes a filtering circuit 6. Its main purpose is to improve the signal quality and power supply stability, reduce noise and interference, and ensure that the main control circuit 1 receives a clean signal and a stable power supply. Applied to the oral irrigator, it can ensure the stability of the oral irrigator's operation and contribute to achieving a constant water pressure.

[0062] Optionally, the mode switching circuit 100 further includes a power supply terminal 4. The filtering circuit 6 includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first capacitor C1, and a second capacitor C2. One end of the sixth resistor R6 and the seventh resistor R7 is connected to the power supply terminal 4. The other end of the sixth resistor R6 is connected to the first capacitor C1 and the main control circuit 1, and the other end of the first capacitor C1 is grounded. The other end of the seventh resistor R7 is connected to the second capacitor C2, the eighth resistor R8, and the main control circuit 1, and the other ends of the second capacitor C2 and the eighth resistor R8 are grounded together.

[0063] It should be noted that the sixth resistor R6 and the seventh resistor R7 form a simple voltage dividing network to help stabilize the voltage input to the main control circuit 1 and prevent voltage mutations from damaging the circuit. The eighth resistor R8, as an additional voltage stabilization measure, works together with the seventh resistor R7 to further refine voltage control. The first capacitor C1 and the second capacitor C2 are used to filter out high-frequency noise and ripples in the power supply to ensure that the voltage received by the main control circuit 1 is smooth and stable. The capacitors can also provide temporary energy during a short-term drop in the power supply voltage to maintain the normal operation of the circuit.

[0064] The specific functions of the filtering circuit 6 for the dental irrigator are as follows: First, during use, the battery of the dental irrigator may undergo charge and discharge cycles, resulting in unstable voltage. The filtering circuit 6 smooths these voltage fluctuations through the charge and discharge of the capacitors, provides consistent power supply for the motor and the main control circuit 1, and ensures the stable operation of the dental irrigator. Second, the trigger signal in the switching circuit 2 needs to be transmitted clearly and accurately to the main control circuit 1 to ensure that the correct working mode is activated. The filtering circuit 6 ensures the purity of the signal by eliminating the noise in the signal, enabling the main control circuit 1 to accurately identify and respond to the user's mode selection.

[0065] The present utility model also proposes a dental irrigator, which includes a motor and a mode switching circuit 100. The specific structure of the mode switching circuit 100 refers to the above-mentioned embodiments. Since this dental irrigator adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated herein one by one. Among them, the mode switching circuit 100 is used to control the motor so that the dental irrigator operates in the corresponding working mode.

[0066] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A mode switching circuit, applied to a water flosser, characterized in that: The dental flosser includes a motor, and the mode switching circuit includes: A main control circuit, the main control circuit having a plurality of preset control signals, each of the preset control signals corresponding to a working mode, and the main control circuit is used to output one of the plurality of preset control signals; A switching circuit, the switching circuit is electrically connected to the main control circuit, the switching circuit is used to generate a corresponding switching signal according to a trigger signal, and the main control circuit switches the output of a preset control signal according to the switching signal; A driving circuit, wherein the driving circuit is electrically connected to the main control circuit and to the motor, and the driving circuit is used to drive the motor according to the preset control signal so that the oral irrigator operates in a corresponding working mode.

2. The mode switching circuit according to claim 1, wherein: The water flosser has a first working mode, a second working mode and a third working mode, and the main control circuit has a first preset PWM value, a second preset PWM value, a third preset PWM value and corresponding first preset control signals, second preset control signals and third preset control signals; When the main control circuit outputs a first preset control signal, the driving circuit drives the motor to operate at a first preset PWM value, so that the oral rinser operates in a first operating mode; When the main control circuit outputs a second preset control signal, the driving circuit drives the motor to operate at a second preset PWM value, so that the punch operates in a second operating mode; When the main control circuit outputs a third preset control signal, the driving circuit drives the motor to operate at a third preset PWM value, so that the punch operates in a third operating mode; The first preset PWM value corresponds to a first duty cycle, and the second preset PWM value corresponds to a second duty cycle; The third preset PWM value corresponds to a third duty cycle, and the third duty cycle alternates between the first duty cycle and the second duty cycle at a preset frequency.

3. The mode switching circuit according to claim 1, wherein: The switching circuit has a power supply end and a plurality of diodes, the number of the diodes is the same as the number of the preset control signals, one end of the plurality of diodes is connected to the power supply end, and the other end is connected to the main control circuit.

4. The mode switching circuit according to claim 1, wherein: The water flosser has a first working mode, a second working mode and a third working mode, and the main control circuit has corresponding first control signals, second control signals and third control signals; The main control circuit outputs a corresponding one of the first control signal, the second control signal and the third control signal according to the trigger signal of the switching circuit, so that the oral irrigator operates in a corresponding one of the first working mode, the second working mode and the third working mode.

5. The mode switching circuit according to claim 4, characterized in that: The mode switching circuit includes a power supply terminal; the switching circuit includes a first diode, a second diode, a third diode, a first resistor, a second resistor and a third resistor; The power supply end is connected to one end of the first resistor, the second resistor and the third resistor; the other end of the first resistor is connected to the anode of the first diode, and the cathode of the first diode is connected to the main control circuit; the other end of the second resistor is connected to the anode of the second diode, and the cathode of the second diode is connected to the main control circuit; the other end of the third resistor is connected to the anode of the third diode, and the cathode of the third diode is connected to the main control circuit; When the first diode is turned on, the main control circuit generates the first control signal to make the oral irrigator work in the first working mode; when the second diode is turned on, the main control circuit generates the second control signal to make the oral irrigator work in the second working mode; when the third diode is turned on, the main control circuit generates the third control signal to make the oral irrigator work in the third working mode.

6. The mode switching circuit according to claim 1, wherein: The mode switching circuit further includes a signal trigger circuit, and the signal trigger circuit is used to obtain the trigger signal.

7. The mode switching circuit according to claim 6, characterized in that: The mode switching circuit includes a power supply terminal; the signal trigger circuit includes a switch button, a switching button, a fourth resistor and a fifth resistor; One end of the fourth resistor and the fifth resistor are connected to the power supply end, the other end of the fourth resistor is connected to the switch control and the main control circuit, and the other end of the fifth resistor is connected to the switching control and the main control circuit; the other end of the switch control and the switching control are grounded.

8. The mode switching circuit according to claim 1, wherein: The mode switching circuit also includes a filtering circuit.

9. The mode switching circuit according to claim 8, characterized in that: The mode switching circuit further includes a power supply terminal, and the filter circuit includes a sixth resistor, a seventh resistor, an eighth resistor, a first capacitor, and a second capacitor; One end of the sixth resistor and the seventh resistor are connected to the power supply end; the other end of the sixth resistor is connected to the first capacitor and the main control circuit, and the other end of the first capacitor is grounded; the other end of the seventh resistor is connected to the second capacitor, the eighth resistor and the main control circuit, and the other end of the second capacitor and the eighth resistor are grounded.

10. A water flosser, characterized in that: The oral irrigator comprises a motor and a mode switching circuit as described in any one of claims 1 to 9; the mode switching circuit is used to control the motor so that the oral irrigator operates in a corresponding working mode.

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