Control circuit and electric shaver

Abstract

The present invention discloses a control circuit and an electric shaver. The control circuit includes: a main control module; a switch drive module, the switch drive module is used to be connected to a battery and a main control module respectively, the switch drive module is used to receive a vibration trigger signal, and generate a first drive signal according to the vibration trigger signal; a switch module, the switch module is connected to the switch drive module and the battery respectively, the switch module is used to switch the conduction state according to the first drive signal and the power supply; a motor drive module, the motor drive module is connected to the switch module and the main control module respectively; a sampling module, the sampling module is connected to the motor drive module and the main control module respectively, and the sampling module is used to collect the electrical signal of the motor drive module. The embodiment of the present application can avoid the standby power consumption problem existing in the use of power-on methods such as touch or fingerprint recognition, as well as the disadvantage of the push-button switch that is not conducive to waterproof design, and can extend the service life of the electric shaver battery.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit control, and in particular to a control circuit and an electric shaver. Background Art

[0002] Currently, electric shavers accumulate hair, dander, etc. during daily use, so the electric shavers need to be cleaned with water to keep them clean.

[0003] In related art, push-button electric shavers often have gaps at the buttons, which hinders waterproofing. While electric shavers that use touch or fingerprint recognition to turn on and off offer improved waterproofing, they require the shaver's CPU to be in a long-term standby state, resulting in power consumption and a reduction in battery life. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a control circuit and an electric shaver that can realize intelligent control, such as shaking the switch to start operation and automatically shutting down when no contact with the human body is made. It also consumes zero power when shut down, avoiding the standby power consumption problems associated with touch or fingerprint recognition power-on and shut-down methods, as well as the disadvantages of push-button switches that are not conducive to waterproof design. Furthermore, the present invention can extend the battery life of the electric shaver.

[0005] According to the control circuit of the embodiment of the first aspect of the present invention, it includes: a main control module; a switch drive module, the switch drive module is used to be connected to the battery and the main control module respectively, the switch drive module is used to receive a vibration trigger signal, and generate a first drive signal according to the vibration trigger signal; wherein the battery is used to provide power; a switch module, the switch module is respectively connected to the switch drive module, the battery, and the main control module; a motor drive module, the motor drive module is respectively connected to the switch module and the main control module; a sampling module, the sampling module is respectively connected to the motor drive module and the main control module, the sampling module is used to collect the electrical signal of the motor drive module; wherein the switch module is used to switch the conduction state according to the first drive signal and the power supply to power the main control module and the motor drive module; wherein the conduction state includes conduction and off; the main control module is used to generate a second drive signal, the motor drive module is used to switch the working state according to the power supply and the second drive signal; the main control module is also used to update the first drive signal according to the electrical signal collected by the collection module.

[0006] The control circuit according to an embodiment of the present invention has at least the following beneficial effects: the vibration trigger signal is used as a trigger signal for the switch driver module, that is, the switch driver module is configured to generate a first drive signal based on the vibration trigger signal. When the switch module is turned on according to the first drive signal and the power supply, the power provided by the battery is transmitted through the switch module to the main control module and the motor driver module, and the motor driver module starts operating according to the power supply and the second drive signal. Therefore, the embodiment of the present application uses the vibration trigger signal as an indirect control signal for the operating state of the motor driver module, without the need for a key. Therefore, the control circuit provided by the embodiment of the present application not only has a better waterproof design, but also avoids the standby energy consumption phenomenon that occurs when using fingerprint or touch sensing power on and off control. In addition, the main control module is further configured to update the first drive signal based on the collected electrical signal. When the main control module determines that the motor driver module is unloaded and / or the unloaded time is longer than a preset time threshold based on the electrical signal collected by the acquisition module, the main control module updates the first drive signal that turns on the switch module to the first drive signal that turns off the switch module, thereby automatically shutting down the motor driver module and stopping operation. Therefore, the control circuit provided in the embodiment of the present application can also reduce the power consumption of the battery, thereby extending the service life of the battery.

[0007] According to some embodiments of the present invention, the switch driving module includes: a vibration switch, which is used to be connected to the battery, the vibration switch is used to receive the vibration trigger signal, and generate a sub-signal according to the vibration trigger signal; a first resistor, one end of the first resistor is connected to the vibration switch; a first transistor, the base of the first transistor is connected to the other end of the first resistor, the emitter of the first transistor is grounded, and the collector of the first transistor is connected to the switch module; wherein, the first transistor is used to generate the first driving signal according to the sub-signal; a second resistor, one end of the second resistor is connected to the base of the first transistor, and the other end of the second resistor is connected to the first port of the main control module; a first capacitor, one end of the first capacitor is connected to the base of the first transistor, and the other end of the first capacitor is grounded.

[0008] According to some embodiments of the present invention, the switching module includes: a second MOS tube, the source of which is connected to the battery, and the drain of which is connected to the motor drive module; a third resistor, one end of which is connected to the battery, and the other end of which is connected to the gate of the second MOS tube; a fourth resistor, one end of which is connected to the gate of the second MOS tube, and the other end of which is connected to the collector of the first transistor; a second capacitor, one end of which is connected to the drain of the second MOS tube, and the other end of which is grounded; wherein the second MOS tube is used to switch the conduction state according to the first drive signal and the power supply.

[0009] According to some embodiments of the present invention, the motor driving module includes: a motor, the positive electrode of the motor is connected to the drain of the second MOS tube; a third MOS tube, the drain of the third MOS tube is connected to the negative electrode of the motor, the gate of the third MOS tube is connected to the second port of the main control module, and the source of the third MOS tube is connected to the sampling module; a diode, the cathode of the diode is connected to the positive electrode of the motor, and the anode of the diode is connected to the negative electrode of the motor; a fifth resistor, one end of the fifth resistor is connected to the gate of the third MOS tube, and the other end of the fifth resistor is grounded; wherein, the motor is used to switch the working state according to the power supply and the second drive signal.

[0010] According to some embodiments of the present invention, the sampling module includes: a sixth resistor, one end of the sixth resistor being connected to the source of the third MOS transistor, and the other end of the sixth resistor being grounded; a seventh resistor, one end of the seventh resistor being connected to one end of the sixth resistor, and the other end of the seventh resistor being connected to the third port of the main control module; and a third capacitor, one end of the third capacitor being connected to the other end of the seventh resistor, and the other end of the third capacitor being connected to the other end of the sixth resistor.

[0011] According to some embodiments of the present invention, the vibration switch is a spring-type vibration-sensing trigger switch.

[0012] An electric shaver according to an embodiment of the second aspect of the present invention includes: a control circuit as described in any embodiment of the first aspect.

[0013] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0015] Figure 1 A block diagram of a control circuit according to an embodiment of the present invention;

[0016] Figure 2 FIG. 4 is a schematic diagram of a circuit structure of a control circuit according to an embodiment of the present invention.

[0017] Reference numerals:

[0018] Main control module 100 , switch driving module 200 , battery 300 , switch module 400 , motor driving module 500 , sampling module 600 . DETAILED DESCRIPTION

[0019] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0020] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0021] In the description of the present invention, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0022] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0023] In the description of the present invention, reference to terms such as "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 present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0024] Reference Figure 1 The embodiment of the present application provides a control circuit, which includes a main control module 100, a switch driving module 200, a switch module 400, a motor driving module 500 and a sampling module 600. The switch driving module 200 is used to be connected to the battery 300 and the main control module 100 respectively. The switch driving module 200 is used to receive a vibration trigger signal and generate a first driving signal according to the vibration trigger signal. The battery 300 is used to provide power. The switch module 400 is connected to the switch driving module 200, the battery 300 and the main control module 100 respectively. The switch module 400 is used to switch the conduction state according to the first drive signal and the power supply to power the motor driving module 500 and the main control module 100. The conduction state includes on and off. The motor driving module 500 is connected to the switch module 400 and the main control module 100 respectively. The sampling module 600 is connected to the motor driving module 500 and the main control module 100 respectively. The sampling module 600 is used to collect the electrical signal of the motor driving module 500. Among them, the main control module 100 is used to generate the second drive signal, the motor drive module 500 is used to switch the working state according to the power supply and the second drive signal, and the main control module 100 is also used to update the first drive signal according to the electrical signal collected by the sampling module 600.

[0025] Specifically, the control circuit provided in the embodiment of the present application can be applied to devices that work through motors, such as electric shavers. The following is a specific description using the application to an electric shaver as an example. The motor drive module 500 includes components such as a motor. When the control circuit is applied to an electric shaver, the working state of the motor drive module 500 is the working state of the electric shaver. The switch module 400 is arranged on the connection path between the battery 300 and the motor drive module 500 and the main control module 100. When the switch module 400 is turned on, the battery 300 transmits power to the motor drive module 500 and the main control module 100 through the switch module 400. The motor drive module 500 starts working according to the power supply and the second drive signal generated by the main control module 100, thereby starting the electric shaver. Among them, the switch drive module 200 is used to control the switch module 400 to be turned on or off. It can be seen that the switch drive module 200 is used to indirectly control the working state of the motor drive module 500. Therefore, in order to achieve a waterproof design for the electric shaver, the switch driver module 200 is configured as a vibration trigger module, that is, the vibration trigger signal is the trigger signal of the switch driver module 200. When the switch driver module 200 receives the vibration trigger signal, the switch driver module 200 generates a first drive signal that can control the switch module 400 to conduct, thereby powering the main control module 100 and the motor driver module 500. The second drive signal of the main control module controls the motor driver module 500 to start working.

[0026] It is understood that the sampling module 600 is used to sample the electrical signal of the motor driver module 500 during operation, and the electrical signal includes at least one of a current signal and a voltage signal. The sampling module 600 sends the electrical signal to the main control module 100, and the main control module 100 determines whether the motor driver module 500 is unloaded based on the electrical signal, that is, whether the electric shaver is not in contact with the human body. When the main control module 100 determines that the motor driver module 500 is unloaded and / or the unloaded time duration exceeds a preset time threshold based on the electrical signal, in order to reduce the power consumption of the battery 300, the main control module 100 controls the switch driver module 200 through the connection port with the switch driver module 200 to generate a first drive signal to shut down the switch module 400, thereby shutting down the connection path between the battery 300 and the motor driver module 500 and the main control module 100, thereby shutting down the main control module 100 and the motor driver module 500, thereby shutting down the electric shaver.

[0027] The control circuit provided in the embodiment of the present application uses the vibration trigger signal as the trigger signal of the switch drive module 200, that is, the switch drive module 200 is used to generate a first drive signal according to the vibration trigger signal. When the switch module 400 is turned on according to the first drive signal and the power supply, the power provided by the battery 300 is transmitted to the main control module 100 and the motor drive module 500 through the switch module 400, and the motor drive module 500 starts working according to the power supply and the second drive signal provided by the main control module 100. It can be seen that the embodiment of the present application uses the vibration trigger signal as an indirect control signal for the power on and the working state of the motor drive module 500, without the need for pressing a button. Therefore, the control circuit provided in the embodiment of the present application can not only have a better waterproof design, but also can avoid the standby energy consumption phenomenon that occurs when using fingerprint or touch sensing power on and off control. Furthermore, the main control module 100 is further configured to update the first drive signal based on the electrical signal. When the main control module 100 determines based on the electrical signal that the motor drive module 500 is unloaded and / or the unloaded duration exceeds a preset time threshold, the main control module 100 updates the first drive signal that turns on the switch module 400 to a first drive signal that turns off the switch module 400, thereby controlling automatic shutdown and de-energizing the main control module 100 and the motor drive module 500, achieving zero power consumption during shutdown. Therefore, the control circuit provided in the embodiments of the present application can also reduce the power consumption of the battery 300, thereby extending the usable life of the battery 300.

[0028] Reference Figure 1 and Figure 2 In some embodiments, the switch driver module 200 includes a vibration switch SW1, a first resistor R1, a first transistor Q1, a second resistor R2, and a first capacitor C1. The vibration switch SW1 is connected to the battery 300, receives a vibration trigger signal, and generates a sub-signal based on the vibration trigger signal to provide the switch module 400 with a signal for instantaneously conducting power to the main control module 100 and the motor driver module 500. One end of the first resistor R1 is connected to the vibration switch SW1. The base of the first transistor Q1 is connected to the other end of the first resistor R1, the emitter of the first transistor Q1 is grounded, and the collector of the first transistor Q1 is connected to the switch module 400. The first transistor Q1 is configured to generate a first drive signal based on the sub-signal. One end of the second resistor R2 is connected to the base of the first transistor Q1, and the other end of the second resistor R2 is connected to the first port PWR of the main control module 100. One end of the first capacitor C1 is connected to the base of the first transistor Q1, and the other end of the first capacitor C1 is grounded.

[0029] It can be understood that the vibration switch SW1 is a vibration sensor, and the vibration switch SW1 is a spring-type vibration sensing trigger switch. The vibration switch SW1 is used to sense the magnitude of the vibration force (i.e., the vibration trigger signal), and transmit the sensing result (i.e., the sub-signal) generated according to the magnitude of the vibration force to the circuit device connected to it, thereby providing a trigger signal for the circuit to be turned on and off. When the speed of swinging the vibration switch SW1 is greater than or equal to the preset centrifugal force, the conductive pin inside the vibration switch SW1 will be turned on instantaneously. At this time, the power generated by the battery 300 is transmitted to the base of the first transistor Q1 through the vibration switch SW1 and the biased first resistor R1 to drive the first transistor Q1 to turn on. The switch module 400 is turned on following the conduction of the first transistor Q1, so that the power is transmitted to the main control module 100 and the motor drive module 500 through the switch module 400. At this time, the motor drive module 500 starts working according to the power supply and the second drive signal provided by the main control module 100.

[0030] When the main control module 100 determines, based on the electrical signal generated by the sampling module 600, that the motor drive module 500 is unloaded and / or the unloaded duration exceeds a preset time threshold, the first port PWR of the main control module 100 outputs a low-voltage signal. This low-voltage signal is transmitted to the base of the first transistor Q1 through the second resistor R2, thereby turning off the first transistor Q1. The switch module 400 also turns off in response to the first transistor Q1 turning off. At this point, the main control module 100 and the motor drive module 500 are powered off and enter a shutdown state.

[0031] Secondly, in order to ensure that the main control module 100 and the motor drive module 500 remain in a continuous power supply and working state after the shaking of the vibration switch SW1 stops, the main control module 100 drives the switch module 400 to turn on instantly and the power is powered on. The main control module 100 outputs a high-level drive signal through the first port PWR to maintain the on-state of the switch module 400 and maintain the continuous power supply of the battery 300 to the motor drive module 500.

[0032] In the embodiment of the present application, the first transistor Q1 can be selected as an NPN transistor. The battery 300 can be two dry cells or a single 3.7V lithium battery to provide the main control module 100 with a voltage that can operate normally. The vibration switch SW1 is of a normally open type, and the internal ball is provided with a spring damper, that is, when the speed of swinging the vibration switch SW1 is greater than or equal to the preset centrifugal force, the ball will contact and conduct with the internal electrode spring, thereby preventing the electric shaver from moving normally or being placed at an angle during shaving and causing false triggering and conduction. It is understandable that when the external force disappears, the circuit device connected to the vibration switch SW1 needs to automatically restore its off state. Therefore, the vibration switch SW1 can use a spring-type vibration induction trigger switch such as SW-18010P with a current resistance of not less than 2mA. The first transistor Q1 can use an NPN transistor in a SOT23 package such as 3904, 8050, 9014. The first resistor R1 and the second resistor R2 can use resistors with a resistance value of any value between 4.7KΩ and 10KΩ. The first capacitor C1 can use a 100nF chip capacitor.

[0033] In some embodiments, the switch module 400 includes a second MOS transistor Q2, a third resistor R3, a fourth resistor R4, and a second capacitor C2. The source of the second MOS transistor Q2 is connected to the battery 300, and the drain of the second MOS transistor Q2 is connected to the motor drive module 500. One end of the third resistor R3 is connected to the battery 300, and the other end of the third resistor R3 is connected to the gate of the second MOS transistor Q2. One end of the fourth resistor R4 is connected to the gate of the second MOS transistor Q2, and the other end of the fourth resistor R4 is connected to the collector of the first transistor Q1. One end of the second capacitor C2 is connected to the drain of the second MOS transistor Q2, and the other end of the second capacitor C2 is grounded. The second MOS transistor Q2 is configured to switch its conduction state based on the first drive signal and the power supply.

[0034] Specifically, when the first drive signal is generated by the first transistor Q1 being turned on, the gate of the second MOS transistor Q2 is connected to ground via the fourth resistor R4 and the first transistor Q1. At this point, the second MOS transistor Q2 is turned on, and the power provided by the battery 300 is transmitted to the main control module 100 and the motor drive module 500 via the second MOS transistor Q2. The motor drive module 500 then starts operating based on this power and the second drive signal provided by the main control module 100. When the first drive signal is generated by the first transistor Q1 being turned off, the second MOS transistor Q2 is turned off, and the main control module 100 and the motor drive module 500 cannot start due to lack of power, thus entering a shutdown state.

[0035] In the embodiment of the present application, the second MOS transistor Q2 is a PMOS transistor, such as a P-channel MOSFET in a SOT23 package, such as the NCE3401, with a current rating of no less than 4.4A and a source-drain withstand voltage of 30V. The third resistor R3 can have a resistance value between 100KΩ and 200KΩ, the fourth resistor R4 can have a resistance value between 4.7KΩ and 10KΩ, and the second capacitor C2 can be a 10μF, 16V withstand voltage chip capacitor.

[0036] In some embodiments, the motor drive module 500 includes a motor M, a third MOS transistor Q3, a diode D1, and a fifth resistor R5. One end of the motor M is connected to the drain of the second MOS transistor Q2. The drain of the third MOS transistor Q3 is connected to the other end of the motor M, the gate of the third MOS transistor Q3 is connected to the second port MT of the main control module 100, and the source of the third MOS transistor Q3 is connected to the sampling module 600. The cathode of the diode D1 is connected to the anode of the motor M, and the anode of the diode D1 is connected to the cathode of the motor M. One end of the fifth resistor R5 is connected to the gate of the third MOS transistor Q3, and the other end of the fifth resistor R5 is grounded. The motor M is used to switch the working state according to the power supply and the second drive signal.

[0037] Specifically, the motor M, the third MOS transistor Q3, and the sampling module 600 are connected in series. The operating state of the motor driver module 500 corresponds to the operating state of the motor M. Therefore, when the second MOS transistor Q2 is on, power is supplied to the motor M and the main control module 100 through the second MOS transistor Q2. Upon receiving power, the main control module 100 outputs a high-level second drive signal through the second port MT. At this point, the third MOS transistor Q3 is turned on, and the motor M starts operating, i.e., the electric shaver starts operating. When the second MOS transistor Q2 is off, neither the motor M nor the main control module 100 receives a power signal. At this point, the motor M is in an inoperative state, i.e., the electric shaver is in an off state.

[0038] In the embodiment of the present application, the third MOS transistor Q3 is an NMOS transistor, such as an N-channel MOS transistor in a SOT23 package, with a current rating of no less than 5A and a drain-source voltage rating of 30V, and a type such as A03400 or AP2306. When two dry cell batteries are used as battery 300, motor M can be a brushed DC motor with a rated operating voltage of 3.0V and a rated operating current of 220mA. When a single 3.74V lithium battery is used as battery 300, motor M can be a brushed DC motor with a rated operating voltage of 3.7V and a rated operating current of 250mA to 300mA. Diode D1 can be a Schottky diode such as SS24 or SS34, and the fifth resistor R5 can be a resistor with a resistance between 10kΩ and 100kΩ.

[0039] In some embodiments, the sampling module 600 includes a sixth resistor R6, a seventh resistor R7, and a third capacitor C3. One end of the sixth resistor R6 is connected to the source of the third MOS transistor Q3, and the other end of the sixth resistor R6 is grounded. One end of the seventh resistor R7 is connected to one end of the sixth resistor R6, and the other end of the seventh resistor R7 is connected to the third port AD of the main control module 100. One end of the third capacitor C3 is connected to the other end of the seventh resistor R7, and the other end of the third capacitor C3 is connected to the other end of the sixth resistor R6.

[0040] Specifically, the sixth resistor R6 is connected in series to the connection path between the third MOS transistor Q3 and the ground terminal, so the sixth resistor R6 serves as a sampling resistor. The seventh resistor R7 and the third capacitor C3 are used to filter the voltage signal across the sixth resistor R6. The third port AD of the main control module 100 obtains the voltage across the filtered sixth resistor R6 through the third capacitor C3 to determine whether the motor drive module 500 is unloaded and / or whether the unloaded duration is greater than a preset time threshold. When it is determined that the motor drive module 500 is unloaded and / or the unloaded duration is greater than the preset time threshold, the second port MT of the main control module 100 outputs a low-level second drive signal to turn off the third MOS transistor Q3 and stop the motor M. At the same time, the first port PWR of the main control module 100 outputs a low-level drive signal to control the first transistor Q1 to turn off, that is, to change the signal type of the first drive signal, thereby controlling the second MOS transistor Q2 to turn off, so that both the main control module 100 and the motor drive module 500 are in a power-off shutdown state.

[0041] It is understandable that the operating current of the motor M when unloaded is less than the operating current when the electric shaver is in contact with the human body. Therefore, a sampling threshold is set, which is less than the sampling voltage when the electric shaver is in contact with the human body. When the sampling voltage of the sixth resistor R6 is less than the sampling threshold, the motor is considered to be in an unloaded state, that is, the electric shaver is not in contact with the human body; when the sampling voltage of the sixth resistor R6 is greater than the sampling threshold, the electric shaver is considered to be in contact with the human body; when the sampling voltage of the sixth resistor R6 is less than the sampling threshold, and the duration of the less than threshold is greater than the preset time threshold, the electric shaver is considered to have not been in contact with the human body for a long time. At this time, in order to reduce the power consumption of the battery 300, the first port PWR of the main control module 100 controls the second MOS transistor Q2 to shut down the power supply to the main control module 100 and the motor M, entering the shutdown state with zero power consumption.

[0042] It is understood that when the electric shaver is operating normally due to the cutter head being stuck due to accumulated hair, impurities, etc., the motor M is stalled, and the operating current of the motor M when stalled will reach the maximum current value. Therefore, the sixth resistor R6 can also be used to determine whether the motor M is stalled. When it is determined that the motor M is stalled and the stall lasts for more than 2 seconds, the second port MT of the main control module 100 outputs a low-level second drive signal to control the motor M to stop operating. Simultaneously, the first port PWR of the main control module 100 outputs a low-level first drive signal to control the second MOS transistor Q2 to turn off, so that both the motor M and the main control module 100 return to the power-off state.

[0043] It is understood that the main control module 100 includes at least one AD detection port and two I / O ports. The operating voltage range of the main control module 100 is 2.2V to 5.5V. The ROM space of the main control module 100 is not less than 1K. The main control module 100 can use a single-chip microcontroller in an SOP8-pin package, such as the MDT10F272 or HT66F002. The sixth resistor R6 can be a 0.01Ω precision chip resistor with an accuracy of ±1% and a 1210 package. The seventh resistor R7 can be a resistor with a resistance between 1KΩ and 2.2KΩ. The third capacitor C3 can be a 100nF chip capacitor.

[0044] An embodiment of the present application further provides an electric shaver, which includes the control circuit described in any of the above embodiments.

[0045] It can be seen that the contents of the above control circuit embodiments are all applicable to the present electric shaver embodiment. The functions specifically implemented by the present electric shaver embodiment are the same as those of the above control circuit embodiments, and the beneficial effects achieved are also the same as those achieved by the above control circuit embodiments.

[0046] It can be understood that an electric shaver refers to a component that can perform shaving. An electric shaver includes a static blade, a movable blade, a fixing part and other structures. The specific structure of the electric shaver can be adaptively modified according to actual application, and the embodiments of this application do not make specific limitations.

[0047] The control circuit and electric shaver provided in the embodiments of the present application implement intelligent control, enabling operation by shaking the shaver to start, and automatically shutting down when no contact with the human body is established, with zero power consumption during shutdown. Therefore, the control circuit and electric shaver provided in the embodiments of the present application avoid the standby power consumption issues associated with touch or fingerprint recognition startup methods, as well as the disadvantages of push-button switches that hinder waterproofing, and extend the battery life of the electric shaver.

[0048] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the embodiments described above. Various modifications may be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof may be combined with one another unless there is a conflict.

Claims

1. A control circuit, characterized in that include: Main control module; a switch driving module, the switch driving module being connected to the battery and the main control module respectively, the switch driving module being used to receive a vibration trigger signal and generate a first driving signal according to the vibration trigger signal; wherein the battery is used to provide power; a switch module, the switch module being connected to the switch drive module, the battery, and the main control module respectively; a motor drive module, the motor drive module being connected to the switch module and the main control module respectively; a sampling module, the sampling module being connected to the motor driving module and the main control module respectively, and the sampling module being used to collect the electrical signal of the motor driving module; The switch module is configured to switch the conduction state according to the first drive signal and the power supply to supply power to the main control module and the motor drive module; the conduction state includes on and off; the main control module is configured to generate a second drive signal, and the motor drive module is configured to switch the working state according to the power supply and the second drive signal; the main control module is further configured to update the first drive signal according to the electrical signal collected by the sampling module; Wherein, the main control module is used to update the first drive signal when it is determined according to the electrical signal that the motor drive module is no-loaded and / or the no-load duration is greater than a preset time threshold, so that the switch module is turned off according to the updated first drive signal.

2. The control circuit according to claim 1, wherein: The switch driving module includes: a vibration switch, the vibration switch being connected to the battery, the vibration switch being configured to receive the vibration trigger signal and generate a sub-signal according to the vibration trigger signal; a first resistor, one end of which is connected to the vibration switch; a first transistor, wherein the base of the first transistor is connected to the other end of the first resistor, the emitter of the first transistor is grounded, and the collector of the first transistor is connected to the switch module; wherein the first transistor is configured to generate the first driving signal according to the sub-signal; a second resistor, one end of the second resistor being connected to the base of the first transistor, and the other end of the second resistor being connected to the first port of the main control module; A first capacitor, one end of the first capacitor is connected to the base of the first transistor, and the other end of the first capacitor is grounded.

3. The control circuit according to claim 2, characterized in that: The switch module includes: a second MOS transistor, wherein a source of the second MOS transistor is connected to the battery, and a drain of the second MOS transistor is connected to the motor drive module; a third resistor, one end of the third resistor being connected to the battery, and the other end of the third resistor being connected to the gate of the second MOS transistor; a fourth resistor, one end of the fourth resistor being connected to the gate of the second MOS transistor, and the other end of the fourth resistor being connected to the collector of the first transistor; a second capacitor, one end of the second capacitor being connected to the drain of the second MOS transistor, and the other end of the second capacitor being grounded; The second MOS transistor is used to switch the conduction state according to the first driving signal and the power supply.

4. The control circuit according to claim 3, characterized in that: The motor drive module includes: a motor, wherein the positive electrode of the motor is connected to the drain electrode of the second MOS tube; a third MOS transistor, wherein the drain of the third MOS transistor is connected to the negative electrode of the motor, the gate of the third MOS transistor is connected to the second port of the main control module, and the source of the third MOS transistor is connected to the sampling module; a diode, wherein the cathode of the diode is connected to the anode of the motor, and the anode of the diode is connected to the cathode of the motor; a fifth resistor, one end of the fifth resistor being connected to the gate of the third MOS transistor, and the other end of the fifth resistor being grounded; Wherein, the motor is used to switch the working state according to the power supply and the second driving signal.

5. The control circuit according to claim 4, characterized in that: The sampling module includes: a sixth resistor, one end of the sixth resistor being connected to the source of the third MOS transistor, and the other end of the sixth resistor being grounded; a seventh resistor, one end of the seventh resistor being connected to one end of the sixth resistor, and the other end of the seventh resistor being connected to the third port of the main control module; a third capacitor, one end of the third capacitor being connected to the other end of the seventh resistor, and the other end of the third capacitor being connected to the other end of the sixth resistor.

6. The control circuit according to any one of claims 2 to 5, characterized in that: The vibration switch is a spring-type vibration-sensing trigger switch.

7. An electric shaver, characterized in that include: A control circuit as claimed in any one of claims 1 to 6.

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