Driving circuit, electric toothbrush body and electric toothbrush

Abstract

The utility model discloses a driving circuit, an electric toothbrush body and an electric toothbrush, the driving circuit comprises a first switch circuit and a second switch circuit, the input end of the first switch circuit is connected with a battery, and the output end of the first switch circuit is respectively connected with the input end of the second switch circuit and a first electrode of a motor; the output end of the second switching circuit is grounded; the input end of the third switching circuit is connected to the battery, the output end of the third switching circuit is connected with the input end of the fourth switching circuit and the second electrode of the motor, and the output end of the fourth switching circuit is grounded; the main control circuit is respectively connected with the controlled end of the first switching circuit, the controlled end of the second switching circuit, the controlled end of the third switching circuit and the controlled end of the fourth switching circuit; the electric toothbrush aims at solving the technical problem that an existing electric toothbrush is single in movement mode.

Description

Technical Field

[0001] This utility model relates to the field of electric toothbrush technology, and in particular to a drive circuit, an electric toothbrush body, and an electric toothbrush. Background Technology

[0002] With increasing health awareness, electric toothbrushes have gradually become an important tool for daily oral care. Compared with traditional manual toothbrushes, electric toothbrushes can more efficiently clean the tooth surface and interdental areas through high-speed rotation, vibration, or oscillation, while reducing the burden on users and significantly improving cleaning results.

[0003] However, existing electric toothbrushes still have many shortcomings in their functional design, especially in terms of their limited working modes, which only support rotational vibration in one direction, making it difficult to meet the diverse needs of different users. Utility Model Content

[0004] The main purpose of this invention is to propose a drive circuit, an electric toothbrush body, and an electric toothbrush, aiming to solve the technical problem that the existing electric toothbrushes have relatively limited motion modes.

[0005] To achieve the above objectives, this utility model proposes a driving circuit for use in an electric toothbrush. The electric toothbrush includes an electric toothbrush body and a toothbrush head. The electric toothbrush body includes a motor, which is connected to the toothbrush head in a driving connection. The driving circuit includes:

[0006] A first switching circuit and a second switching circuit, wherein the input terminal of the first switching circuit is connected to the battery, the output terminal of the first switching circuit is connected to the input terminal of the second switching circuit and the first electrode of the motor, and the output terminal of the second switching circuit is grounded.

[0007] The third switch circuit and the fourth switch circuit are connected in the following ways: the input terminal of the third switch circuit is connected to the battery, the output terminal of the third switch circuit is connected to the input terminal of the fourth switch circuit and the second electrode of the motor, and the output terminal of the fourth switch circuit is grounded.

[0008] The main control circuit is connected to the controlled terminals of the first switch circuit, the second switch circuit, the third switch circuit, and the fourth switch circuit, respectively.

[0009] The main control circuit is used to alternately control the first switch circuit and the fourth switch circuit to be turned on / off, and to control the second switch circuit and the third switch circuit to be turned off / on, when receiving a preset control command, so as to control the motor to run alternately between forward and reverse rotation.

[0010] In one embodiment, the first switching circuit includes a first switching transistor, the second switching circuit includes a second switching transistor, the third switching circuit includes a third switching transistor, and the fourth switching circuit includes a fourth switching transistor.

[0011] The input terminals of the first and third switching transistors are both connected to a battery. The output terminal of the first switching transistor is connected to the input terminal of the second switching transistor, the output terminal of the second switching transistor is connected to the input terminal of the fourth switching transistor, and the output terminals of the third and fourth switching transistors are both grounded.

[0012] The controlled terminals of the first switch, the second switch, the third switch, and the fourth switch are all electrically connected to the main control circuit.

[0013] The output terminal of the first switch and the input terminal of the second switch are also electrically connected to the first electrode of the motor, and the output terminal of the third switch and the input terminal of the fourth switch are also electrically connected to the second electrode of the motor.

[0014] In one embodiment, the first switching circuit further includes:

[0015] A first resistor and a second resistor, wherein the first end of the first resistor is connected to the battery, and the second ends of both the first resistor and the second resistor are connected to the controlled end of the first switching transistor, and the first end of the second resistor is electrically connected to the main control circuit.

[0016] The second switching circuit also includes:

[0017] The third resistor and the fourth resistor, the first end of the third resistor and the second end of the fourth resistor are both connected to the controlled end of the second switching transistor, the second end of the third resistor is grounded, and the first end of the fourth resistor is electrically connected to the main control circuit;

[0018] The third switching circuit also includes:

[0019] The fifth resistor and the sixth resistor, the first end of the fifth resistor is connected to the battery, the second ends of the fifth resistor and the second ends of the sixth resistor are both connected to the controlled end of the third switch, and the first end of the sixth resistor is electrically connected to the main control circuit;

[0020] The fourth switching circuit also includes:

[0021] The seventh resistor and the eighth resistor are connected, with the first end of the seventh resistor and the second end of the eighth resistor both connected to the controlled terminal of the fourth switch transistor. The second end of the seventh resistor is grounded, and the first end of the eighth resistor is electrically connected to the main control circuit.

[0022] In one embodiment, the driving circuit further includes:

[0023] A triggering component is electrically connected to the main control circuit. The triggering component is used to output a corresponding trigger signal when triggered. The main control circuit is used to alternately control the first switching circuit and the four-switch circuit to be turned on / off when the trigger signal is detected as a preset control command, and to control the second switching circuit and the third switching circuit to be turned off / on.

[0024] This utility model also proposes an electric toothbrush body, including a motor and the drive circuit described in any of the above claims; wherein the motor is electrically connected to the drive circuit.

[0025] In one embodiment, the electric toothbrush body includes:

[0026] A power input terminal, which is used to connect an external power source;

[0027] A battery, which is connected to the power input terminal;

[0028] A current acquisition circuit is provided, wherein the detection terminal of the current acquisition circuit is connected to the power input terminal, and the output terminal of the current acquisition circuit is electrically connected to the main control circuit. The current acquisition circuit is used to output a current acquisition signal when current is acquired.

[0029] An indicator light is electrically connected to the main control circuit; the main control circuit is used to control the indicator light to illuminate when it receives the current detection signal.

[0030] In one embodiment, the current acquisition circuit includes:

[0031] The circuit includes a fifth switch, a ninth resistor, a tenth resistor, and a first capacitor. The input terminal of the fifth switch is electrically connected to the main control circuit. The controlled terminal of the fifth switch is connected to the first terminal of the ninth resistor. The second terminal of the ninth resistor is connected to the first terminal of the first capacitor. The first terminal of the first capacitor is also connected to the power input terminal. The second terminal of the tenth resistor, the output terminal of the fifth switch, and the second terminal of the first capacitor are all grounded.

[0032] In one embodiment, the electric toothbrush body further includes:

[0033] A clamping circuit is electrically connected to the detection terminal of the current acquisition circuit. The clamping circuit is used to limit the voltage input from the power input terminal to the current acquisition circuit within a preset voltage threshold.

[0034] In one embodiment, the clamping circuit includes:

[0035] A Zener diode, wherein the cathode of the Zener diode is electrically connected to the detection terminal of the current acquisition circuit, and the anode of the Zener diode is grounded.

[0036] This utility model also proposes an electric toothbrush, including the electric toothbrush body described in any of the above claims and a toothbrush head detachably connected to the electric toothbrush body.

[0037] This utility model includes a first switch circuit, a second switch circuit, a third switch circuit, a fourth switch circuit, and a main control circuit. The main control circuit is used to alternately control the first switch circuit and the fourth switch circuit to be turned on / off, and to control the second switch circuit and the third switch circuit to be turned off / on, when receiving a preset control command, so that the path of the battery input to the motor alternately cycles between the first electrode to the second electrode and the second electrode to the first electrode, thereby controlling the motor to run alternately between forward and reverse rotation.

[0038] With this configuration, in practical applications, when the drive circuit of this invention is applied to an electric toothbrush, the toothbrush head can not only rotate in any direction, but also rotate alternately between forward and reverse rotation, so as to enable the electric toothbrush to achieve more working modes, thereby meeting the diverse needs of different users. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of a module according to an embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of the circuit structure of an embodiment of the present invention;

[0042] Figure 3 This is a schematic diagram of the circuit structure of another embodiment of the present utility model;

[0043] Figure 4 This is a schematic diagram of a module according to another embodiment of the present utility model;

[0044] Figure 5 This is a schematic diagram of a module according to another embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the circuit structure of another embodiment of the present invention;

[0046] Figure 7 This is a schematic diagram of a module according to another embodiment of the present invention;

[0047] Figure 8 This is a schematic diagram of the circuit structure of another embodiment of the present invention.

[0048] Explanation of icon numbers:

[0049] 10. Motor; 20. Battery; 30. First switch circuit; 40. Second switch circuit; 50. Third switch circuit; 60. Fourth switch circuit; 70. Main control circuit; 80. Trigger component; 90. Current acquisition circuit; 100. Clamping circuit; 110. Indicator light.

[0050] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0051] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0052] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0053] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0054] With increasing health awareness, electric toothbrushes have gradually become an important tool for daily oral care. Compared with traditional manual toothbrushes, electric toothbrushes can more efficiently clean the tooth surface and interdental areas through high-speed rotation, vibration, or oscillation, while reducing the burden on users and significantly improving cleaning results.

[0055] However, existing electric toothbrushes still have many shortcomings in their functional design, especially in terms of their limited working modes, which only support rotation in one direction or vibration at a fixed frequency, making it difficult to meet the diverse needs of different users.

[0056] Therefore, this utility model proposes a driving circuit, an electric toothbrush body, and an electric toothbrush, aiming to solve the technical problem that existing electric toothbrushes have a relatively limited range of motion modes. In one embodiment of this utility model, referring to... Figure 1 The driving circuit includes:

[0057] A first switching circuit 30 and a second switching circuit 40 are connected. The input terminal of the first switching circuit 30 is connected to the battery 20. The output terminal of the first switching circuit 30 is connected to the input terminal of the second switching circuit 40 and the first electrode of the motor 10, respectively. The output terminal of the second switching circuit 40 is grounded.

[0058] The third switch circuit 50 and the fourth switch circuit 60 are connected. The input terminal of the third switch circuit 50 is connected to the battery 20, and the output terminal of the third switch circuit 50 is connected to the input terminal of the fourth switch circuit 60 and the second electrode of the motor 10, respectively. The output terminal of the fourth switch circuit 60 is grounded.

[0059] The main control circuit 70 is connected to the controlled terminals of the first switch circuit 30, the second switch circuit 40, the third switch circuit 50, and the fourth switch circuit 60, respectively.

[0060] The main control circuit 70 is used to alternately control the first switch circuit 30 and the fourth switch circuit 60 to be turned on / off, and to control the second switch circuit 40 and the third switch circuit 50 to be turned off / on, when receiving a preset control command, so as to control the motor 10 to run alternately between forward and reverse rotation.

[0061] In this embodiment, the first switching circuit 30, the second switching circuit 40, the third switching circuit 50, and the fourth switching circuit 60 can all be implemented using at least one switching transistor, such as a MOSFET, IGBT, thyristor, transistor, power transistor, etc., and / or using at least one switching device, such as a contactor, circuit breaker, and relay. For example, see Reference Figure 2The first switching circuit 30 includes a first switching transistor Q1, the second switching circuit 40 includes a second switching transistor Q2, the third switching circuit 50 includes a third switching transistor Q3, and the fourth switching circuit 60 includes a fourth switching transistor Q4.

[0062] The input terminals of the first switch Q1 and the third switch Q3 are both connected to the battery 20. The output terminal of the first switch Q1 is connected to the input terminal of the second switch Q2, the output terminal of the second switch Q2 is connected to the input terminal of the fourth switch Q4, and the output terminals of the third switch Q3 and the fourth switch Q4 are both grounded.

[0063] The controlled terminals of the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4 are all electrically connected to the main control circuit 70.

[0064] The output terminal of the first switch Q1 and the input terminal of the second switch Q2 are also electrically connected to the first electrode of the motor 10, and the output terminal of the third switch Q3 and the input terminal of the fourth switch Q4 are also electrically connected to the second electrode of the motor 10.

[0065] In this circuit, the first switch Q1 and the third switch Q3 are PMOS transistors, and the second switch Q2 and the fourth switch Q4 are NMOS transistors. When the main control circuit 70 receives a preset control command, it can first output a low-level signal and a high-level signal to the first switch Q1 and the fourth switch Q4 respectively to control the first switch Q1 and the fourth switch Q4 to conduct. When the first switch Q1 and the fourth switch Q4 are conducted, the current from the battery 20 flows through the first switch Q1 to the first electrode of the motor 10, and then flows out through the second electrode of the motor 10 and the fourth switch Q4 in sequence to drive the motor 10 to rotate in the forward direction.

[0066] The main control circuit 70 then outputs low-level and high-level signals to the second switch Q2 and the third switch Q3 respectively to control the second switch Q2 and the third switch Q3 to conduct. When the second switch Q2 and the third switch Q3 are conducted, the current from the battery 20 flows through the second switch Q2 to the second electrode of the motor 10, and then flows out through the first electrode of the motor 10 and the third switch Q3 in sequence to drive the motor 10 to rotate in the opposite direction. By repeatedly controlling the first switch Q1 and the fourth switch Q4 to conduct / turn off, and controlling the second switch Q2 and the third switch Q3 to turn off / conduct, the motor is driven to run alternately between forward and reverse rotation.

[0067] Furthermore, to ensure that the switching transistor can be fully turned on when turned on and fully turned off when turned off, refer to... Figure 3 The first switching circuit 30 further includes:

[0068] A first resistor R1 and a second resistor R2 are connected. The first end of the first resistor R1 is connected to the battery 20. The second ends of the first resistor R1 and the second ends of the second resistor R2 are both connected to the controlled end of the first switch Q1. The first end of the second resistor R2 is electrically connected to the main control circuit 70.

[0069] The second switching circuit 40 further includes:

[0070] The third resistor R3 and the fourth resistor R4 are connected to the controlled terminal of the second switch Q2, the second terminal of the third resistor R3 is grounded, and the first terminal of the fourth resistor R4 is electrically connected to the main control circuit 70.

[0071] The third switching circuit 50 further includes:

[0072] The fifth resistor R5 and the sixth resistor R6 are connected in the following ways: the first end of the fifth resistor R5 is connected to the battery; the second ends of both the fifth resistor R5 and the sixth resistor R6 are connected to the controlled end of the third switch Q3; and the first end of the sixth resistor R6 is electrically connected to the main control circuit 70.

[0073] The fourth switching circuit 60 further includes:

[0074] The seventh resistor R7 and the eighth resistor R8 are connected to the controlled terminal of the fourth switch Q4, with the first end of the seventh resistor R7 and the second end of the eighth resistor R8 being connected to the ground. The first end of the eighth resistor R8 is electrically connected to the main control circuit 70.

[0075] Specifically, resistors R1 and R5 are used to pull the controlled terminal voltages of the first switch Q1 and the third switch Q3 high to the battery voltage 20, ensuring that the first switch Q1 and the third switch Q3 remain off when they do not receive a low-level signal from the main control circuit 70. Similarly, resistors R4 and R8 are used to pull the controlled terminal voltages of the second switch Q3 and the fourth switch Q4 low, ensuring that the second switch Q2 and the fourth switch Q4 remain off when they do not receive a high-level signal from the main control circuit 70. This configuration avoids electromagnetic interference or other noise sources that could interfere with the switches and cause them to turn on falsely.

[0076] In this embodiment, the main control circuit 70 can be implemented using a main controller, such as an MCU (Microcontroller Unit), a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), or a SOC (System On Chip).

[0077] In this embodiment, the preset control command can be the output to the main control circuit 70 when the trigger component 80 on the electric toothbrush is triggered, as shown in the reference. Figure 4 The driving circuit further includes:

[0078] A trigger component 80 is electrically connected to the main control circuit 70. The trigger component 80 is used to output a corresponding trigger signal when triggered. The main control circuit 70 is used to alternately control the first switch circuit 30 and the four switch circuit 60 to be turned on / off when the trigger signal is detected as a preset control command, and to control the second switch circuit 40 and the third switch circuit 50 to be turned off / on.

[0079] The trigger component 80 can be implemented using a button. For example, the electric toothbrush includes multiple working modes. The motor 10 alternates between forward and reverse rotation, corresponding to the fourth working mode among the multiple working modes. Each time the button is pressed, the electric toothbrush switches working modes. When the electric toothbrush is in the third working mode and the button is pressed, the main control circuit 70, upon receiving the level signal output by the button (equivalent to a preset control command), alternately controls the first switch circuit 30 and the third switch circuit 50 to be turned on / off, and controls the second switch circuit 40 and the fourth switch circuit 60 to be turned off / on, so as to control the electric toothbrush to switch to the fourth working mode.

[0080] In addition, the trigger component 80 can also be implemented using a knob. The knob generates different electrical signals by changing the rotation angle, and transmits these electrical signals as trigger signals to the main control circuit 70. The main control circuit 70 determines the currently selected working mode based on the rotation position of the knob. Based on the above embodiment, when the user rotates the knob to the fourth working mode position, the trigger signal output by the knob is detected by the main control circuit 70. The main control circuit 70 recognizes this signal as a preset control command and alternately controls the first switch circuit 30 and the three-switch circuit to be turned on / off, and controls the second switch circuit 40 and the fourth switch circuit 60 to be turned off / on, so as to control the electric toothbrush to switch to the fourth working mode.

[0081] In this embodiment, the main control circuit 70 can also independently control the first switch circuit 30 and the fourth switch circuit to be turned on, or independently control the second switch circuit 40 and the third switch circuit 50 to be turned on, so as to drive the motor 10 to rotate forward or reverse. The forward or reverse rotation of the motor 10 can be used as other working modes of the electric toothbrush.

[0082] This utility model includes a first switching circuit 30, a second switching circuit 40, a third switching circuit 50, a fourth switching circuit 60, and a main control circuit 70. The main control circuit 70 is used to alternately control the first switching circuit 30 and the fourth switching circuit 60 to be turned on / off, and to control the second switching circuit 40 and the third switching circuit 50 to be turned on / off, when receiving a preset control command, so that the path from the battery 20 to the motor 10 alternates between the first electrode to the second electrode and the second electrode to the first electrode, thereby controlling the motor 10 to run alternately between forward and reverse rotation.

[0083] With this configuration, in practical applications, when the drive circuit of this invention is applied to an electric toothbrush, the toothbrush head can not only rotate in any direction, but also rotate alternately between forward and reverse rotation, so as to enable the electric toothbrush to achieve more working modes, thereby meeting the diverse needs of different users.

[0084] Furthermore, the main control circuit 70 can generate high-frequency pulse signals according to preset instructions, drive the switching circuit to switch quickly, realize the high-frequency forward and reverse switching of the motor 10, so that the toothbrush head works in high-frequency vibration mode and can reach deep into the gaps between teeth, the gum line and other hard-to-reach areas, which is suitable for users who need to remove stubborn dental plaque or tartar.

[0085] The main control circuit 70 can also control the first switch circuit 30 and the fourth switch circuit 60 to be turned on / off according to preset instructions and at preset time intervals, and control the second switch circuit 40 and the third switch circuit 50 to be turned off / on, so that the toothbrush head adds a pause phase between forward and reverse rotation, thereby reducing continuous stimulation to teeth and gums, which is suitable for users with sensitive teeth.

[0086] This utility model also proposes an electric toothbrush body, including a motor 10 and a drive circuit as described above; wherein the motor 10 is electrically connected to the drive circuit.

[0087] It is worth noting that since the electric toothbrush body of this utility model is based on the above-mentioned drive circuit, the embodiments of the electric toothbrush body of this utility model include all the technical solutions of all the embodiments of the above-mentioned drive circuit, and the technical effects achieved are exactly the same, so they will not be repeated here.

[0088] In one embodiment of this utility model, reference is made to Figure 5 The electric toothbrush body includes:

[0089] A power input terminal, which is used to connect an external power source;

[0090] Battery 20, which is connected to the power input terminal;

[0091] A current acquisition circuit 90 is provided, wherein the detection terminal of the current acquisition circuit 90 is connected to the power input terminal, and the output terminal of the current acquisition circuit 90 is electrically connected to the main control circuit 70. The current acquisition circuit 90 is used to output a current acquisition signal when current is acquired.

[0092] Indicator light 110 is electrically connected to the main control circuit 70; the main control circuit 70 is used to control the indicator light 110 to light up when it receives the current detection signal.

[0093] With the above settings, in practical applications, when the electric toothbrush is plugged into the charger and the charging current charges the battery 20 through the power input terminal, the indicator light 110 will light up to intuitively remind the user that the electric toothbrush is in the charging state.

[0094] When the electric toothbrush is plugged into the charger and no charging current flows through the power input terminal to charge battery 20, indicator light 110 will not light up, providing a clear indication to the user that the electric toothbrush is not charging properly (this could be due to a charger malfunction, poor contact, or a problem with battery 20). Users can easily monitor the charging status of the electric toothbrush by observing the status of indicator light 110, requiring no additional operation or expertise.

[0095] In this embodiment, optionally, the current acquisition circuit 90 can be implemented based on the resistor voltage divider method, for example, referring to... Figure 6 The current acquisition circuit 90 includes:

[0096] The circuit consists of a fifth switch Q5, a ninth resistor R9, a tenth resistor R10, and a first capacitor C1. The input terminal of the fifth switch Q5 is electrically connected to the main control circuit 70. The controlled terminal of the fifth switch Q5 is connected to the first terminal of the ninth resistor R9. The second terminal of the ninth resistor R9 is connected to the first terminal of the first capacitor C1. The first terminal of the first capacitor C1 is also connected to the power input terminal. The second terminal of the tenth resistor R10, the output terminal of the fifth switch Q5, and the second terminal of the first capacitor C1 are all grounded.

[0097] Among them, the fifth switch Q5 is an NMOS transistor. When current is input to the battery 20 through the power input terminal, part of the current will flow to the ninth resistor R9 and the tenth resistor R10, so that the voltage of the ninth resistor R9 and the tenth resistor R10 rises. When the voltage of the tenth resistor R10 rises to the conduction threshold of the fifth switch Q5, the fifth switch Q5 turns on. After the fifth switch Q5 turns on, it will pull down the voltage of the port connected to the input terminal of the fifth switch Q5 in the main control circuit 70, so that the main control circuit 70 can detect a low level signal. When the main control circuit 70 detects a low level signal, the control indicator 110 lights up to indicate to the user that the electric toothbrush is in charging state.

[0098] When no current is input to battery 20 through the power input terminal, the voltage of the ninth resistor R9 and the tenth resistor R10 is 0, the fifth switch Q5 remains off, and the voltage of the port connected to the input terminal of the fifth switch Q5 of the main control circuit 70 remains at a high level. At this time, the main control circuit 70 controls the indicator light 110 to turn off, so as to intuitively remind the user that the electric toothbrush has not been charged properly.

[0099] In addition, the current acquisition circuit 90 can also be implemented using a current sensor, such as a Hall effect sensor or a current transformer, without limitation.

[0100] In one embodiment of this utility model, reference is made to Figure 7 The electric toothbrush body also includes:

[0101] A clamping circuit 100 is electrically connected to the detection terminal of the current acquisition circuit 90. The clamping circuit 100 is used to limit the voltage input from the power input terminal to the current acquisition circuit 90 within a preset voltage threshold.

[0102] By setting the voltage input to the current acquisition circuit 90 within a preset voltage threshold, excessive voltage can be prevented from affecting the current acquisition circuit 90. The preset voltage threshold is the maximum voltage that the current acquisition circuit 90 can withstand.

[0103] In this embodiment, the clamping circuit 100 can be implemented using a Zener diode D1, as shown in the reference. Figure 8 The clamping circuit 100 includes:

[0104] A Zener diode D1 is provided, with its cathode electrically connected to the detection terminal of the current acquisition circuit 90 and its anode grounded. The Zener diode D1 has reverse breakdown characteristics; when the voltage exceeds its breakdown voltage, it conducts and clamps the voltage to the breakdown voltage value, preventing damage to the current acquisition circuit 90 due to overvoltage.

[0105] In addition, the clamping circuit 100 can also be implemented using a linear regulator. The linear regulator can stabilize the input voltage at the set voltage value, preventing the current acquisition circuit 90 from being damaged due to overvoltage. This is not a limitation.

[0106] This utility model also proposes an electric toothbrush, including the electric toothbrush body described above and a toothbrush head detachably connected to the electric toothbrush body.

[0107] It is worth noting that since the electric toothbrush of this utility model is based on the electric toothbrush body described above, the embodiments of the electric toothbrush of this utility model include all the technical solutions of all the embodiments of the electric toothbrush body described above, and the technical effects achieved are exactly the same, so they will not be repeated here.

[0108] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A drive circuit for use in an electric toothbrush, the electric toothbrush comprising an electric toothbrush body and a toothbrush head, the electric toothbrush body comprising a motor, the motor being drively connected to the toothbrush head, characterized in that, The driving circuit includes: A first switching circuit and a second switching circuit, wherein the input terminal of the first switching circuit is connected to the battery, the output terminal of the first switching circuit is connected to the input terminal of the second switching circuit and the first electrode of the motor, and the output terminal of the second switching circuit is grounded. The third switch circuit and the fourth switch circuit are connected in the following ways: the input terminal of the third switch circuit is connected to the battery, the output terminal of the third switch circuit is connected to the input terminal of the fourth switch circuit and the second electrode of the motor, and the output terminal of the fourth switch circuit is grounded. The main control circuit is connected to the controlled terminals of the first switch circuit, the second switch circuit, the third switch circuit, and the fourth switch circuit, respectively. The main control circuit is used to alternately control the first switch circuit and the fourth switch circuit to be turned on / off, and to control the second switch circuit and the third switch circuit to be turned off / on, when receiving a preset control command, so as to control the motor to run alternately between forward and reverse rotation.

2. The driving circuit as described in claim 1, characterized in that, The first switching circuit includes a first switching transistor, the second switching circuit includes a second switching transistor, the third switching circuit includes a third switching transistor, and the fourth switching circuit includes a fourth switching transistor. The input terminals of the first and third switching transistors are both connected to a battery. The output terminal of the first switching transistor is connected to the input terminal of the second switching transistor, the output terminal of the second switching transistor is connected to the input terminal of the fourth switching transistor, and the output terminals of the third and fourth switching transistors are both grounded. The controlled terminals of the first switch, the second switch, the third switch, and the fourth switch are all electrically connected to the main control circuit. The output terminal of the first switch and the input terminal of the second switch are also electrically connected to the first electrode of the motor, and the output terminal of the third switch and the input terminal of the fourth switch are also electrically connected to the second electrode of the motor.

3. The driving circuit as described in claim 2, characterized in that, The first switching circuit also includes: A first resistor and a second resistor, wherein the first end of the first resistor is connected to the battery, and the second ends of both the first resistor and the second resistor are connected to the controlled end of the first switching transistor, and the first end of the second resistor is electrically connected to the main control circuit. The second switching circuit also includes: The third resistor and the fourth resistor, the first end of the third resistor and the second end of the fourth resistor are both connected to the controlled end of the second switching transistor, the second end of the third resistor is grounded, and the first end of the fourth resistor is electrically connected to the main control circuit; The third switching circuit also includes: The fifth resistor and the sixth resistor, the first end of the fifth resistor is connected to the battery, the second ends of the fifth resistor and the second ends of the sixth resistor are both connected to the controlled end of the third switch, and the first end of the sixth resistor is electrically connected to the main control circuit; The fourth switching circuit also includes: The seventh resistor and the eighth resistor are connected, with the first end of the seventh resistor and the second end of the eighth resistor both connected to the controlled terminal of the fourth switch transistor. The second end of the seventh resistor is grounded, and the first end of the eighth resistor is electrically connected to the main control circuit.

4. The driving circuit according to any one of claims 1 to 3, characterized in that, The driving circuit also includes: A triggering component is electrically connected to the main control circuit. The triggering component is used to output a corresponding trigger signal when triggered. The main control circuit is used to alternately control the first switching circuit and the four-switch circuit to be turned on / off when the trigger signal is detected as a preset control command, and to control the second switching circuit and the third switching circuit to be turned off / on.

5. An electric toothbrush body, characterized in that, It includes a motor and a drive circuit as described in any one of claims 1 to 4; wherein the motor is electrically connected to the drive circuit.

6. The electric toothbrush body as described in claim 5, characterized in that, The electric toothbrush body includes: A power input terminal, which is used to connect an external power source; A battery, which is connected to the power input terminal; A current acquisition circuit is provided, wherein the detection terminal of the current acquisition circuit is connected to the power input terminal, and the output terminal of the current acquisition circuit is electrically connected to the main control circuit. The current acquisition circuit is used to output a current acquisition signal when current is acquired. An indicator light is electrically connected to the main control circuit; the main control circuit is used to control the indicator light to illuminate when it receives the current acquisition signal.

7. The electric toothbrush body as described in claim 6, characterized in that, The current acquisition circuit includes: The circuit includes a fifth switch, a ninth resistor, a tenth resistor, and a first capacitor. The input terminal of the fifth switch is electrically connected to the main control circuit. The controlled terminal of the fifth switch is connected to the first terminal of the ninth resistor. The second terminal of the ninth resistor is connected to the first terminal of the first capacitor. The first terminal of the first capacitor is also connected to the power input terminal. The second terminal of the tenth resistor, the output terminal of the fifth switch, and the second terminal of the first capacitor are all grounded.

8. The electric toothbrush body as described in claim 7, characterized in that, The electric toothbrush body also includes: A clamping circuit is electrically connected to the detection terminal of the current acquisition circuit. The clamping circuit is used to limit the voltage input from the power input terminal to the current acquisition circuit within a preset voltage threshold.

9. The electric toothbrush body as described in claim 8, characterized in that, The clamping circuit includes: A Zener diode, wherein the cathode of the Zener diode is electrically connected to the detection terminal of the current acquisition circuit, and the anode of the Zener diode is grounded.

10. An electric toothbrush, characterized in that, Includes an electric toothbrush body as described in any one of claims 5 to 9 and a toothbrush head detachably connected to the electric toothbrush body.

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