Nursing equipment and energy charging assembly

Abstract

The embodiment of the invention discloses nursing equipment and an energy charging assembly. The nursing equipment comprises a power supply circuit, a charging circuit, a first control unit and a second control unit with a switch control function. The first control unit is configured to send a feedback signal to the second control unit if a conductive foreign matter exists in the electrical interface in the nursing equipment; a first port of the second control unit is connected with the power supply circuit, and a second port of the second control unit is connected with the charging circuit. And the second control unit is configured to control the second port of the second control unit not to output a voltage signal or output a low-level voltage signal after receiving the feedback signal, so that the upper potential of the charging circuit is 0, that is, the power supply of the charging circuit is cut off, the charging circuit is prevented from being short-circuited at the electrical interface, and the safety of equipment charging is improved.

Description

Technical Field

[0001] The present application relates to the technical field of nursing appliances, and in particular to a nursing device and a charging component. Background Art

[0002] Electric toothbrushes, shavers and other care equipment will inevitably come into contact with water during use. Improper use by users may cause water to seep into the charging port. In addition, electric toothbrushes, shavers and other care equipment are usually placed in the bathroom, where the humidity is high, which may also cause humid gas to seep into the charging port. This may cause an internal short circuit in the charging port when the device is charging. Continuous charging may also cause the charging port to melt, and even cause a fire hazard.

[0003] To address the above-mentioned problems, no safer solution has been proposed yet. Summary of the invention

[0004] The embodiments of this specification provide a nursing device and a charging component to solve the charging safety problem of existing nursing devices.

[0005] To solve the above technical problems, the embodiments of this specification are implemented as follows: A nursing device, comprising: a power supply circuit, a charging circuit, a first control unit, and a second control unit with a switch control function; The first control unit is configured to send a feedback signal to the second control unit if there is a conductive foreign object in the electrical interface of the nursing device; The first port of the second control unit is connected to the power supply circuit, and the second port of the second control unit is connected to the charging circuit; the second control unit is configured to control the second port of the second control unit not to output a voltage signal or to output a low-level voltage signal after receiving the feedback signal.

[0006] A charging component, comprising a power supply circuit, a charging circuit, and a second control unit; The first port of the second control unit is connected to the power supply circuit, and the second port of the second control unit is connected to the charging circuit; the second control unit is configured to control the second port of the second control unit not to output a voltage signal or to output a low-level voltage signal if a feedback signal from the first control unit is received; the first control unit is configured to send the feedback signal to the second control unit if there is a conductive foreign object on the electrical interface of the device charged by the charging component; the electrical interface is configured as the electrical connection port of the device.

[0007] At least one embodiment of the present specification can achieve the following beneficial effects: by connecting the second control unit with switch control function in series between the power supply circuit and the charging circuit, the second control unit can be used to control whether there is a potential on the charging circuit. If the second control unit receives a feedback signal sent by the first control unit, the second port is controlled not to output a voltage signal or to output a low-level voltage signal, so that the potential in the charging circuit is 0, that is, the power supply of the charging circuit is disconnected, and the charging circuit is prevented from being short-circuited at the electrical interface, thereby improving the safety of device charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0009] Figure 1 It is a structural schematic diagram of a nursing device provided in an embodiment of this specification; Figure 2 It is a schematic diagram of an electrical interface provided in an embodiment of this specification; Figure 3 It is a schematic diagram of an electrical connector provided in an embodiment of this specification; Figure 4 It is a schematic diagram of the overall structure of a detection and protection system provided in an embodiment of this specification; Figure 5 It is a schematic diagram of the electrical structure of a detection and protection system provided in an embodiment of this specification.

[0010] Reference numerals: 1. Nursing device body, 11. First control unit, 12. Electrical interface, 13. Detection unit, 14. Second protection circuit; 2. Charging component, 21. Adapter, 22. Transmission cable, 221. Second control unit, 2211. First electronic switch, 222. Power supply circuit, 223. Charging circuit, 224. First protection circuit, 225. First resistor. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical solutions and advantages of one or more embodiments of this specification clearer, the technical solutions of one or more embodiments of this specification will be clearly and completely described below in combination with the specific embodiments of this specification and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of one or more embodiments of this specification.

[0012] The technical solutions provided by the embodiments of this specification are described in detail below in conjunction with the accompanying drawings.

[0013] Figure 1 Schematic diagram of a nursing device provided in the embodiment of this specification. Figure 1 As shown, a nursing device provided by the present application may include: a power supply circuit 222, a charging circuit 223, a first control unit 11 and a second control unit 221 with a switch control function.

[0014] The first control unit 11 may be configured to send a feedback signal to the second control unit 221 if there is a conductive foreign object in the electrical interface 12 of the nursing device.

[0015] The first port of the second control unit 221 can be connected to the power supply circuit 222, and the second port of the second control unit 221 can be connected to the charging circuit 223; the second control unit 221 can be configured to control the second port of the second control unit 221 not to output a voltage signal or to output a low-level voltage signal after receiving the feedback signal.

[0016] In the embodiment of the present specification, the nursing device may include a nursing device body 1 and a charging component 2; the nursing device body 1 may be an electric shaver, an electric hair clipper, an electric facial cleanser, an electric tooth cleaner, etc. The charging component 2 may be a component for charging the nursing device body 1. The power supply circuit 222, the charging circuit 223, and the second control unit 221 may be provided in the charging component 2.

[0017] The first port may be an input port in the second control unit 221 , and the second port may be an output port in the second control unit 221 .

[0018] The power supply circuit 222 and the charging circuit 223 may be circuits for charging the nursing device body 1. The power supply circuit 222 may be a circuit connected to a power source; specifically, the power supply circuit 222 may refer to a circuit between a power source and a first port. The charging circuit 223 may be a circuit connected to the nursing device body 1; specifically, the charging circuit 223 may be a circuit between a second port and the nursing device body 1. If there is a charging voltage on the charging circuit 223, the nursing device body 1 can be charged; if there is no charging voltage on the charging circuit 223, it is equivalent to disconnecting the power supply of the charging circuit, that is, disconnecting the charging power supply of the nursing device body 1.

[0019] The first control unit 11 and the second control unit 221 can be a circuit board, an MCU, etc. The types and models of the first control unit 11 and the second control unit 221 can be the same or different.

[0020] In the embodiment of this specification, the electrical interface 12 can be provided at the nursing device body 1. The electrical interface 12 can be used to charge the energy storage element configured in the nursing device body 1; it can also be used to directly provide power to the nursing device body 1. Specifically, the electrical interface 12 can be a Type-C interface, a lighting interface, a trapezoidal Micro USB interface, etc.

[0021] In the embodiments of the present specification, the feedback signal may be used to reflect the presence of conductive foreign matter in the electrical interface 12; the conductive foreign matter may be a conductive liquid, a conductive solid, or the like.

[0022] During charging, if there is a conductive foreign object in the electrical interface 12, the charging circuit 223 may be short-circuited at the electrical interface 12, which may damage the electrical interface 12 or the nursing device body 1, and may even cause a fire in serious cases. Therefore, if a conductive foreign object is detected in the electrical interface 12 during charging, certain protective measures need to be taken.

[0023] In practical applications, the first control unit 11 and the second control unit 221 may perform wireless communication or wired communication.

[0024] In the embodiment of the present specification, if the second control unit 221 receives the feedback signal sent by the first control unit 11, it can control the second port of the second control unit 221 connected to the charging circuit 223 to output a low-level voltage signal or not output a voltage signal. As a result, there is no output voltage in the charging circuit 223, that is, the power supply of the charging circuit 223 for charging the nursing device body 1 is disconnected, thereby fundamentally ensuring the safety of charging the nursing device.

[0025] In actual applications, since wireless communication is easily interfered by electromagnetic waves and other external factors, the signal transmission speed and stability may be affected, and the communication reliability is poor; in order to ensure that the second control unit 221 can receive the feedback signal sent by the first control unit 11 to ensure the safety of charging of the nursing equipment, the embodiments of this specification may give priority to wired communication.

[0026] Optionally, the first control unit 11 can send the feedback signal to the second control unit 221 via a communication cable; one end of the communication cable can be connected to the signal output port of the first control unit 11, and the other end can be connected to the acquisition pin of the second control unit 221.

[0027] In the embodiment of this specification, the feedback signal may be a voltage signal or a current signal. The acquisition pin may be a signal input pin or a signal receiving pin in the second control unit 221. After the acquisition pin receives the feedback signal, the second control unit 221 may control the second output port to output a low-level voltage signal or control the second port not to output a voltage signal, thereby making the potential in the charging circuit 223 0.

[0028] In the embodiment of this specification, a specific circuit connection structure for receiving feedback signals from the collection pin of the second control unit 221 is also provided.

[0029] Optionally, the acquisition pin may also be connected to a first resistor 225 ; and the branch where the communication cable is located is connected in parallel with the branch where the first resistor 225 is located.

[0030] The acquisition pin may be configured to receive a first electrical signal of a first circuit; the first circuit is a circuit including a branch where the first resistor 225 is located and a branch where the communication cable is located.

[0031] In the embodiment of this specification, the feedback signal sent by the first control unit 11 to the second control unit 221 may be a low level signal.

[0032] It can be understood that if the first control unit 11 does not send a feedback signal to the second control unit 221, the branch where the communication cable is located is an open circuit; the first circuit is the branch where the first resistor 225 is located. If the first control unit 11 sends a feedback signal to the second control unit 221, the branch where the communication cable is located is a through circuit and is connected in parallel with the branch where the first resistor 225 is located; according to the circuit principle, the first circuit is a parallel equivalent circuit of the branch where the first resistor 225 is located and the branch where the communication cable is located.

[0033] In the embodiment of this specification, the first electrical signal may be a voltage-divided signal of the first circuit. When the first control unit 11 does not send a feedback signal to the second control unit 221, since the first circuit is the branch where the first circuit is located, the first electrical signal may be a voltage-divided signal of the first resistor 225. After the first control unit 11 sends a feedback signal to the second control unit 221, since the first circuit is a parallel equivalent circuit of the branch where the first resistor 225 is located and the branch where the communication cable is located, the first electrical signal may be a voltage-divided signal of the parallel equivalent circuit. Since the branch where the communication cable is located is connected in parallel with the branch where the first resistor 225 is located, and the resistance of the communication cable is small, the resistance value of the parallel equivalent circuit is significantly smaller than the resistance value of the first resistor 225, thereby reducing the voltage-divided signal of the first resistor 225. If the second control unit 221 detects that the first electrical signal received by the acquisition pin is less than the preset signal threshold, it can be determined that the acquisition pin has received the feedback signal, and it is determined that there is a conductive foreign body in the electrical interface 12, so that the second port can be controlled to output a corresponding control signal to make the potential in the charging circuit 223 0.

[0034] Optionally, the acquisition pin may be an over-temperature protection pin or an over-current protection pin.

[0035] In the embodiment of the present specification, the second control unit 221 may be an integrated chip with over-current protection and / or over-temperature protection, and the second control unit 221 may be provided with an over-current protection pin and / or an over-temperature protection pin.

[0036] If the over-temperature protection pin is used as the acquisition pin; the first resistor 225 can be a fixed-value resistor whose resistance value does not change with temperature; in order to perform over-temperature protection on components, the first resistor 225 can also be a thermistor whose resistance value changes with temperature; specifically, the first resistor 225 can be a negative temperature coefficient thermistor whose resistance value decreases with increasing temperature.

[0037] In the embodiment of the present specification, a second resistor connected in series with the first resistor 225 may also be provided inside the second control unit 221. When the temperature around the second control unit 221 increases, the resistance value of the first resistor 225 decreases with the increase in temperature, so that the voltage division of the first resistor 225 decreases. Therefore, the second control unit 221 can determine whether the ambient temperature is abnormal based on the voltage division signal of the first resistor 225 collected by the collection pin, and output a control signal.

[0038] After the first control unit 11 sends a feedback signal to the second control unit 221, the branch where the communication cable is located is changed from an open circuit to a passage, and is connected in parallel with the branch where the first resistor 225 is located. Since the resistance of the communication cable is small, the resistance value of the first circuit is smaller than the resistance value of the first resistor 225, thereby achieving the purpose of reducing the voltage division of the first resistor 225, thereby simulating the scenario of reduced voltage division due to overtemperature, so that the second control unit 221 determines that the temperature is overheated, thereby performing power-off protection. In the embodiment of this specification, the feedback signal is transmitted by the communication cable to simulate the scenario of the temperature rising around the second control unit 221, so as to achieve the effect of controlling the second control unit 221 to output a control signal.

[0039] If the overcurrent protection pin is used as the acquisition pin; the first resistor 225 can be a fixed resistor with a constant resistance value; the acquisition pin can receive the current value of the first resistor 225, and this current value can be used as the current value of the protection current; usually the protection current value can be greater than the current of the charging circuit 223; for example, the current value of the charging circuit 223 is 500 mA; the current value of the protection current can be set to 1A or 1.5A. If the current value of the charging circuit 223 is greater than the current value of the protection current, it means that the circuit is abnormal, and the second control unit 221 can control the second port not to output a voltage signal.

[0040] In the embodiment of the present specification, after the first control unit 11 sends a feedback signal to the second control unit 221, the branch where the communication cable is located is changed from an open circuit to a pass circuit, and is connected in parallel with the branch where the first resistor 225 is located. The second control unit 221 determines that the resistance of the first resistor 225 is less than the preset value based on the electrical signal collected by the collection pin, and then determines that the circuit is overcurrent and needs to be powered off for protection, thereby using the communication cable to transmit the feedback signal to simulate the current value of the charging circuit 223 being greater than the current value of the protection current, and the circuit is abnormal, so as to achieve the effect of controlling the second control unit 221 to output a control signal.

[0041] Optionally, a first electronic switch 2211 may be provided inside the second control unit 221, and the first port may be an input end of the first electronic switch 2211; the second port may be an output end of the first electronic switch 2211; the second control unit 221 is also configured to control the first electronic switch 2211 to disconnect if the second control unit 221 receives the feedback signal.

[0042] In the embodiment of this specification, the input end of the first electronic switch 2211 can be used as the first port of the second control unit 221 ; the output end can be used as the second port of the second control unit 221 .

[0043] The input end of the first electronic switch 2211 is connected to the power supply circuit 222, and the output end of the first electronic switch 2211 is connected to the charging circuit 223; after the power is turned on, if the first electronic switch 2211 is turned on, the power supply circuit 222 and the charging circuit 223 can be connected; the output end of the first electronic switch 2211, that is, the second port of the second control unit 221, can output a high level, so that the charging circuit 223 has an electric potential, and then the nursing device body 1 can be charged. If the first electronic switch 2211 is disconnected, the power supply circuit 222 and the charging circuit 223 are disconnected; so that the output end of the first electronic switch 2211, that is, the second port of the second control unit 221, has no voltage signal output. The first electronic switch 2211 is disconnected, that is, the power supply for the nursing device body 1 or the charging circuit 223 is disconnected, so that the short circuit of the charging circuit 223 at the electrical interface 12 is fundamentally avoided, and the safety of charging the nursing device body is ensured.

[0044] In order to facilitate the on and off control of the first electronic switch 2211, in the embodiment of this specification, the first electronic switch 2211 with a control terminal can be preferably selected. The control terminal can control whether the input terminal and the output terminal of the first electronic switch 2211 are connected, thereby controlling whether the power supply circuit 222 and the charging circuit 223 are connected.

[0045] Optionally, the first electronic switch 2211 may be any one of a MOS tube, a bipolar junction transistor, a field effect tube, and a micro relay.

[0046] The following is a specific description using the first electronic switch 2211 as a MOS tube.

[0047] The source S of the MOS tube can be used as the first port of the second control unit 221, and can be connected to the power supply circuit 222 as an input terminal; the drain D of the MOS tube can be used as the second port of the second control unit 221, and can be connected to the charging circuit 223 as an output terminal; the gate G of the MOS tube can be used as a control terminal to be internally controlled by the second control unit 221. The second control unit 221 can control whether the MOS tube is turned on by controlling the gate G of the MOS tube.

[0048] It is understandable that when the MOS transistor is an NMOS transistor, the second control unit 221 can control the MOS transistor to be disconnected by outputting a low-level voltage signal, and when the MOS transistor is a PMOS transistor, the second control unit 221 can control the MOS transistor to be disconnected by outputting a high-level signal.

[0049] In the embodiment of this specification, the second control unit 221 may also be an MCU.

[0050] Optionally, the first port may be a power input port of the second control unit 221 ; the second port may be a signal output port of the second control unit 221 .

[0051] In the embodiment of the present specification, the power supply circuit 222 is connected to the power input port of the second control unit 221 to provide power to the second control unit 221, so that the second control unit 221 can work normally.

[0052] The second port is connected to the charging circuit 223; after the second control unit 221 receives the feedback signal sent by the first control unit 11, it can control the second port to output a low-level voltage signal, so that the potential in the charging circuit 223 can be made 0, which is equivalent to cutting off the power supply of the charging circuit 223, and can effectively prevent the charging circuit 223 from short-circuiting at the electrical interface 12, thereby effectively ensuring the safety of charging the nursing device body.

[0053] In the embodiment of this specification, a structure of an electrical interface 12 is also provided to enable the first control unit 11 and the second control unit 221 to perform wired communication.

[0054] Optionally, at least one pin of the electrical interface 12 is configured as a first communication pin; and the first control unit 11 is connected to the first communication pin.

[0055] The nursing device may further include a transmission cable 22 having an electrical connector; at least one pin of the electrical connector is configured as a second communication pin; and the second control unit 221 is connected to the second communication pin.

[0056] The electrical interface 12 is coupled to the electrical connector, the first communication pin is connected to the second communication pin to form an electrical loop, and the second control unit 221 is communicatively connected to the first control unit 11 .

[0057] Figure 2 This is a schematic diagram of an electrical interface provided in the embodiments of this specification. Figure 2 As shown, the electrical interface 12 may be provided with a plurality of pins.

[0058] Figure 3 This is a schematic diagram of an electrical connector provided in the embodiments of this specification. Figure 3 As shown, a plurality of pins may also be provided in the electrical connector.

[0059] When the electrical interface 12 is coupled to the electrical connector, a plurality of pins in the electrical interface 12 may be correspondingly connected to a plurality of pins in the electrical connector, thereby performing energy transfer or signal transfer.

[0060] In the embodiment of this specification, when the electrical interface 12 is coupled to the electrical connector, the first communication pin can be connected to the second communication pin, so that a complete communication link can be formed, so that the first control unit 11 can communicate with the second control unit 221. The first communication pin can be connected to the data transmission pin or the signal output pin of the first control unit 11, which can be selected according to the actual situation and is not specifically limited here. The second communication pin can be connected to the acquisition pin of the second control unit 221; which can be selected according to the actual situation and is not specifically limited here.

[0061] In practical applications, the TX pin in the electrical interface 12 can be used as the first communication pin, and correspondingly, the TX pin at the corresponding position of the electrical connector can be used as the second communication pin; of course, the RX pin in the electrical interface 12 can be used as the first communication pin, and correspondingly, the RX pin at the corresponding position of the electrical connector can be used as the second communication pin.

[0062] As an implementation method, the two TX pins obliquely symmetrically arranged in the electrical interface 12 can be used as the first communication pins, and correspondingly, the two TX pins obliquely symmetrically arranged in the corresponding position of the electrical connector can be used as the second communication pins. Of course, the two RX pins obliquely symmetrically arranged in the electrical interface 12 can also be used as the first communication pins, and correspondingly, the two RX pins obliquely symmetrically arranged in the corresponding position of the electrical connector can be used as the second communication pins. In this way, the electrical interface 12 and the electrical connector can communicate regardless of whether they are inserted forward or backward.

[0063] In the embodiments of the present specification, the electrical connector and the electrical interface 12 are directly used to realize the wired communication between the first control unit 11 and the second control unit 221. There is no need to select a control unit with a communication function, nor is there any need to configure the control unit with additional wireless communication components, thereby saving resources and costs; at the same time, the success rate of the first control unit 11 sending feedback signals to the second control unit 221 is improved, thereby improving the charging safety of the nursing equipment.

[0064] Optionally, the electrical interface 12 may be configured to have two first communication pins, and the two first communication pins may be located at opposite sides of the electrical interface 12, respectively, and / or, The electrical connector may be configured to have two second communication pins, and the two second communication pins may be located at opposite sides of the electrical connector, respectively.

[0065] In the embodiment of this specification, the electrical interface 12 may include two first communication pins, and the two first communication pins may be arranged obliquely, such as Figure 2 The two first communication pins may both be connected to the signal sending pin of the first control unit 11. Alternatively, only one first communication pin may be provided in the electrical interface 12.

[0066] The electrical connector may also include two second communication pins, and the two second communication pins may be arranged obliquely, such as Figure 3 The two second communication pins may both be connected to the signal receiving pin of the second control unit 221. Of course, only one second communication pin may be provided in the electrical connector.

[0067] In the embodiments of the present specification, two communication pins are arranged in at least one of the electrical interface 12 and the electrical connector, and the two communication pins are arranged obliquely, so that when the electrical connector is connected to the electrical interface 12, there is no need to identify the positive and reverse directions, thereby improving the convenience of use; at the same time, it avoids the situation where the first control unit 11 and the second control unit 221 cannot communicate when the direction of the electrical connector connected to the electrical interface 12 is incorrect, thereby improving the charging safety of the nursing equipment.

[0068] In actual applications, when selling the device, merchants may only provide a transmission cable 22 as the charging component 2.

[0069] Optionally, the nursing device may include a transmission cable 22 ; the second control unit 221 may be configured in the transmission cable 22 .

[0070] The transmission cable 22 may be a data cable having charging and data or signal transmission functions.

[0071] Optionally, the transmission cable 22 may include wires and electrical connectors.

[0072] The second control unit 221 is configured in the wire; or, The second control unit 221 is configured in the electrical connector.

[0073] In practical applications, the transmission cable 22 may generally include a wire and an electrical connector; in the embodiment of the present specification, the second control unit 221 may be disposed in the wire of the transmission cable 22. Since the wire is generally a flexible structure, in order to avoid damage to the second control unit 221 when the wire is bent, a protective shell for protecting the second control unit 221 may also be disposed on the wire. The second control unit 221 is disposed in the wire to avoid the influence of other electrical components in the transmission cable 22 on the second control unit 221. At the same time, since a protective shell is disposed on the wire, it is also convenient for users to distinguish the transmission cable 22 with a protective function from other cables.

[0074] In addition, the second control unit 221 can also be set in the electrical connector. By setting the second control unit 221 in the electrical connector, the distance between the second control unit 221 and the second communication pin can be closer, thereby effectively simplifying the line structure of the communication cable. And because the electrical connector also includes other circuit structures, setting the second control unit 221 in the electrical connector avoids setting a separate installation position and structure for the second control unit 221, thereby simplifying the structure of the transmission cable 22.

[0075] In addition, when merchants sell the device, the charging component 2 provided may only be the adapter 21.

[0076] Optionally, the care device may include an adapter 21, and the second control unit 221 may be configured in the adapter 21 of the care device.

[0077] Since the circuit board in the adapter 21 is relatively large, the second control unit 221 is disposed in the adapter 21, which can facilitate the layout of the second control unit 221. It can be understood that in order to ensure that the second control unit 221 in the adapter 21 can communicate with the first control unit 11 by wire, it is necessary to use a data transmission line equipped with a communication cable and a first communication pin.

[0078] In practical applications, the first control unit 11 may be configured in the nursing device body 1 of the nursing device.

[0079] In actual applications, the control unit may be damaged when threatened by overvoltage, overcurrent, surge, etc. Based on this, in order to protect the second control unit 221, the embodiment of this specification also provides a protection circuit for protecting the second control unit 221.

[0080] Optionally, the nursing device may further include a first protection circuit 224 ; the first protection circuit 224 may be connected to the second control unit 221 for protecting the second control unit 221 .

[0081] The first protection circuit 224 is connected to the second control unit 221 and can be used to protect the second control unit 221 from damage in the event of overvoltage, overcurrent, surge, electromagnetic interference, etc. The specific structure of the first protection circuit 224 is not specifically limited herein.

[0082] The first protection circuit 224 is used to protect the second control unit 221 to prevent the second control unit 221 from being damaged, which can effectively ensure that the second control unit 221 can work normally. For example, it can ensure that the second control unit 221 can receive the feedback signal sent by the first control unit 11 and output a corresponding control signal, thereby further ensuring the safety of the nursing device when charging.

[0083] Optionally, the care device may further include a care component, which may include bristles, a nozzle, a bristle carrier and a brush handle, and the brush handle may be constructed to have a liquid flow channel.

[0084] In the embodiments of this specification, the care device may be an electric shaver, an electric hair clipper, an electric facial cleanser, an electric tooth cleaner, or a composite oral care device having the functions of brushing and flushing. The care component may include a brush wire for brushing and a nozzle for flushing.

[0085] The nozzle can be integrally formed with the brush wire carrier, or can be separately mounted on the brush wire carrier, or can be separately mounted on the brush handle. The nozzle can be partially or completely surrounded by the brush wire, or can be relatively independent of the brush wire area.

[0086] In the embodiment of the present specification, the liquid flow channel may be a channel disposed inside the brush handle for the flushing fluid to pass through. The flushing fluid may reach the nozzle through the liquid flow channel and be ejected from the nozzle.

[0087] In order to achieve the effects of brushing and flushing teeth, the care device may also generally include a driving component.

[0088] Optionally, the nursing device may further include a driving component, which may include a pump component and / or a motor component coupled to the nursing component.

[0089] In the embodiments of the present specification, the motor assembly may include a motor and a motor shaft. The output end of the motor shaft may be fixedly connected to the care assembly. The motor may drive the brush wires in the care assembly to reciprocate and vibrate or rotate through the motor shaft.

[0090] The pump assembly may be a power assembly that pumps the flushing fluid to the nozzle. Specifically, the motor shaft may be a hollow shaft; one end of the hollow portion of the motor shaft may be connected to the output end of the pump assembly, and the other end may be connected to the liquid flow path of the brush handle. Under the power of the pump assembly, the flushing fluid may enter the hollow portion of the motor shaft, pass through the liquid flow path at the brush handle, and reach the nozzle, and provide a jet to the user's oral cavity, thereby achieving oral cleaning.

[0091] In practical applications, the composite oral care device with the functions of brushing teeth and flushing teeth can be used separately or together. A button for the user to select an oral cleaning mode can also be provided on the care device body 1.

[0092] The present embodiment also provides specific contents of detecting whether there is a conductive foreign object in the electrical interface 12 .

[0093] Optionally, the nursing device may further include a detection unit 13, which may be communicatively connected to the first control unit 11; the detection unit 13 may be configured to send a second electrical signal to the first control unit 11; the second electrical signal may be used to reflect the electrical potential at the first pin in the electrical interface 12.

[0094] The first control unit 11 may be specifically configured to send the feedback signal to the second control unit 221 if the electric potential exceeds a preset electric potential threshold.

[0095] In practical applications, the detection unit 13 can communicate with the first control unit 11 through serial communication. Specifically, the first control unit 11 can communicate with the second control unit 221 through at least one communication method among SPI, IIC, RS232, and RS485.

[0096] In the embodiment of the present specification, the first pin may be any one of the electrical interface 12 except the power input pin. Specifically, the first pin may be a pin in the electrical interface 12 close to the power input pin VBUS. For example, the first pin may be the SBU1 pin, such as Figure 2 or Figure 3 shown.

[0097] Since the electrical interface 12 is small in size, in a bathroom or other usage environment, the entire electrical interface 12 or most of the electrical interface 12 is easily covered by water, thereby causing a short circuit between the first pin and the power input pin VBUS, thereby increasing the potential of the first pin. Therefore, whether there is a conductive foreign object in the electrical interface 12 can be detected by detecting the potential of the first pin.

[0098] In an embodiment of the present specification, the detection unit 13 may include a first voltage acquisition circuit for detecting a potential signal at the first pin. The first voltage acquisition circuit may be an ADC voltage sampling circuit. The detection unit 13 may send the potential signal at the first pin acquired by the first voltage acquisition circuit to the first control unit 11; the first control unit 11 may determine the potential of the first pin based on the potential signal. If the potential at the first pin exceeds the preset potential threshold, it means that there may be a conductive foreign object in the electrical interface 12, and the first control unit 11 may send a feedback signal to the second control unit 221 so that the second control unit 221 may control the second port to output a control signal based on the feedback signal. If the potential of the first pin does not exceed the preset potential threshold, it can be determined that there is no conductive foreign object between the first pin and the power input pin VBUS.

[0099] In the embodiment of this specification, if it is determined that there is no conductive foreign object between the first pin and the power input pin VBUS, it is possible to further detect whether there is a conductive foreign object between the first pin and other pins to ensure the availability of other pins.

[0100] Optionally, the detection unit 13 may also be configured to send a third electrical signal to the first control unit 11 ; the third electrical signal may be used to reflect the resistance value between the first pin and the second pin at the electrical interface 12 .

[0101] The first control unit 11 may be specifically configured to send the feedback signal to the second control unit 221 if the resistance value between the first pin and the second pin is less than a preset resistance threshold.

[0102] In the embodiments of this specification, the second pin and the first pin may be arranged adjacent to each other or spaced apart; for example, the second pin may be a ground pin (GND pin).

[0103] In practical applications, the detection unit 13 may further include a sensing circuit and a second voltage acquisition circuit. The sensing circuit may at least form a return circuit with the first pin and the second pin; the return circuit may include a current source; and the current source may be controlled to be turned on by the first control unit 11 when the potential of the first pin is less than a preset potential threshold.

[0104] The second voltage acquisition circuit can be configured to detect a voltage value between the first pin and the second pin; the second electrical signal can include a current value and a voltage value between the first pin and the second pin; the current value is the value of the current output by the current source in the return circuit.

[0105] The first control unit 11 may be specifically configured as follows: The resistance value between the first pin and the second pin is determined according to the current value and the voltage value between the first pin and the second pin.

[0106] If the resistance value between the first pin and the second pin is less than the preset resistance threshold, the feedback signal is sent to the second control unit 221 .

[0107] In the embodiments of this specification, the current source can be used to provide voltage to the return circuit. The current value output by the current source can be customized according to actual needs within the circuit safety range. Specifically, the current value can be set to 1uA, 10uA, 100uA, 1mA, etc.

[0108] In practical applications, the second voltage acquisition circuit can be an ADC voltage sampling circuit; the second voltage acquisition circuit and the first voltage acquisition circuit can be the same; or a separate voltage sampling circuit can be provided. The second voltage acquisition circuit can be used to detect the voltage value between the first pin and the second pin.

[0109] In practical applications, if the potential of the first pin does not exceed the preset potential threshold, the first control unit 11 may control the current source in the return circuit to turn on, so as to power on the return circuit.

[0110] When there is a conductive foreign object between the first pin and the second pin, the first pin and the second pin will be short-circuited, thereby reducing the resistance between the first pin and the second pin. Therefore, it can be determined whether there is a conductive foreign object between the first pin and the second pin based on the resistance value between the first pin and the second pin.

[0111] In practical applications, the first control unit 11 can calculate the resistance between the first pin and the second pin according to the current value and the voltage value between the first pin and the second pin. In another embodiment, the second electrical signal can include the resistance value calculated by the sensing circuit according to the current value and the voltage value between the first pin and the second pin, that is, the sensing circuit can directly calculate the resistance value, avoiding the first control unit 11 obtaining the current value and voltage value fed back by the sensing circuit and then calculating again.

[0112] If the resistance value determined by the first control unit 11 is less than the preset resistance threshold, it can be explained that there is a conductive foreign object between the first pin and the second pin, thereby causing the resistance between the first pin and the second pin to decrease. Therefore, the first control unit 11 can send a feedback signal to the second control unit 221 so that the second control unit 221 disconnects the power supply for charging the nursing device body 1.

[0113] If the resistance value between the first pin and the second pin is greater than or equal to the preset resistance threshold, it can be said that the resistance between the first pin and the second pin is normal, so it can be determined that there is no conductive foreign matter between the first pin and the second pin; therefore, there is no need to send a feedback signal to the second control unit 221.

[0114] In addition, when the current output by the current source is only a fixed current, the second electrical signal may also include only the voltage value between the first pin and the second pin detected by the second voltage acquisition circuit. Since the current value remains unchanged, if the voltage value between the first pin and the second pin is less than the preset value, it can also indicate whether there is a conductive foreign object between the first pin and the second pin.

[0115] In the embodiments of the present specification, since the user may also use other charging components 2 to charge the nursing device body 1; in order to avoid the presence of conductive foreign matter in the electrical interface 12 during charging, which may cause damage to the electrical interface 12 or damage to the nursing device body 1, a protection circuit may also be provided at the nursing device body 1 to further protect the charging safety of the nursing device body 1.

[0116] Optionally, the nursing device may also include a second protection circuit 14; the second protection circuit 14 has a second electronic switch, the input end of the second electronic switch can be connected to the power input line in the charging circuit 223, and the output end of the second electronic switch can be connected to the ground line in the charging circuit 223; the control end of the second electronic switch is connected to the signal output port of the first control unit 11.

[0117] The first control unit 11 may also be configured to send a protection instruction to the second protection circuit 14 if there is a conductive foreign object in the electrical interface 12; the protection instruction is used to control the second electronic switch to turn on.

[0118] In the embodiment of this specification, the second electronic switch in the second protection circuit 14 may be an electronic switch with a relatively small internal resistance when turned on. For example, the second electronic switch may be a MOS tube, and the internal resistance of the MOS tube is in the milliohm level when turned on.

[0119] In actual applications, when charging the nursing device body 1 using the charging component 2 without power-off protection, if there is a conductive foreign object in the electrical interface 12, the charging circuit 223 will be short-circuited at the electrical interface 12. In the embodiment of this specification, the input end of the second electronic switch in the second protection circuit 14 is connected to the power input line VIN in the charging circuit 223, and the output end is connected to the ground line GND in the charging circuit 223, so that the short-circuited circuit at the electrical interface 12 is connected in parallel with the second protection circuit 14. Since the internal resistance of the second electronic switch in the second protection circuit 14 is at the milliohm level when it is turned on, which is much smaller than the impedance of the short-circuit loop inside the electrical interface 12; most of the current output by the charging circuit can be shunted by the second protection circuit 14; thereby, continuous heating of the short-circuit loop in the electrical interface 12 can be avoided, and the hot melting of the electrical interface 12 can be avoided.

[0120] If there is a conductive foreign object in the electrical interface 12 , a prompt message may be sent to the user in order to facilitate prompting the user so that the user is aware and can take certain measures.

[0121] Optionally, the nursing device body 1 also includes an information prompt component connected to the first control unit 11.

[0122] The first control unit 11 may also be configured to send a prompt signal to the information prompt component if there is a conductive foreign object in the electrical interface 12 ; the information prompt component is used to send prompt information, and the prompt information is used to prompt the user that there is a conductive foreign object in the electrical interface 12 .

[0123] The first control unit 11 is also configured to send a prompt signal to the information prompt component if there is a conductive foreign object in the electrical interface 12; the information prompt component is used to send prompt information, and the prompt information is used to prompt the user that there is a conductive foreign object in the electrical interface 12.

[0124] The information prompt component may be a visual prompt component; for example, a display screen or an indicator light; if the prompt component is a display screen, the prompt signal may be a signal for controlling the display screen to display text prompt information. If the prompt component is an indicator light, the prompt signal may be a signal for controlling the indicator light to light up in a preset color or flash at a preset frequency.

[0125] The information prompt component may also be a voice prompt component; if the prompt component is a voice prompt component, the prompt signal may be a signal for controlling the voice prompt component to output voice prompt information.

[0126] The information prompt component may also be a motor; if the prompt component is a motor, the prompt signal may be a signal that controls the vibration of the motor.

[0127] As an optional implementation, the embodiment of this specification also provides a charging component 2 for solving the charging safety problem of existing nursing equipment.

[0128] The charging component 2 may include a power supply circuit 222 , a charging circuit 223 , and a second control unit 221 .

[0129] The first port of the second control unit 221 is connected to the power supply circuit 222, and the second port of the second control unit 221 is connected to the charging circuit 223; the second control unit 221 is configured to control the second port of the second control unit 221 not to output a voltage signal or to output a low-level voltage signal if a feedback signal from the first control unit 11 is received; the first control unit 11 is configured to send the feedback signal to the second control unit 221 if there is a conductive foreign object at the electrical interface 12 of the device charged by the charging component 2; the electrical interface 12 is configured as the electrical connection port of the device.

[0130] In the embodiments of this specification, the power supply circuit 222 and the charging circuit 223 may be circuits for charging the nursing device body 1. The power supply circuit 222 may be a circuit connected to a power source. Specifically, the power supply circuit 222 may refer to a circuit between a power source and a first port. The charging circuit 223 may be a circuit connected to the nursing device body 1. Specifically, the charging circuit 223 may be a circuit between the second port and the nursing device body 1. If there is a charging voltage on the charging circuit 223, the nursing device body 1 can be charged; if there is no charging voltage on the charging circuit 223, it is equivalent to disconnecting the power supply of the charging circuit, that is, disconnecting the charging power supply of the nursing device body 1.

[0131] The first control unit 11 and the second control unit 221 can be a circuit board, an MCU, etc. The types and models of the first control unit 11 and the second control unit 221 can be the same or different.

[0132] In the embodiment of this specification, the electrical interface 12 can be provided at the nursing device body 1. The electrical interface 12 can be used to charge the energy storage element configured in the nursing device body 1; it can also be used to directly provide power to the nursing device body 1. Specifically, the electrical interface 12 can be a Type-C interface, a lighting interface, a trapezoidal Micro USB interface, etc.

[0133] In the embodiments of the present specification, the feedback signal may be used to reflect the presence of conductive foreign matter in the electrical interface 12; the conductive foreign matter may be a conductive liquid, a conductive solid, or the like.

[0134] During charging, if there is a conductive foreign object in the electrical interface 12, the charging circuit 223 may be short-circuited at the electrical interface 12, which may damage the electrical interface 12 or the nursing device body 1, and may even cause a fire in serious cases. Therefore, if a conductive foreign object is detected in the electrical interface 12 during charging, certain protective measures need to be taken.

[0135] In practical applications, the first control unit 11 and the second control unit 221 may perform wireless communication or wired communication.

[0136] In the embodiment of the present specification, if the second control unit 221 receives a feedback signal sent by the first control unit 11, it can control the second port of the second control unit 221 connected to the charging circuit 223 to output a low-level voltage signal or not output a voltage signal, so that there is no output voltage in the charging circuit 223, that is, the power supply of the charging circuit 223 for charging the nursing device body 1 is disconnected, thereby fundamentally ensuring the safety of charging of the nursing device.

[0137] Optionally, the charging assembly 2 includes a transmission cable 22 having an electrical connector.

[0138] At least one pin of the electrical interface 12 is configured as a first communication pin; the first control unit 11 is connected to the first communication pin.

[0139] At least one pin of the electrical connector is configured as a second communication pin; the second control unit 221 is connected to the second communication pin.

[0140] The electrical interface 12 is coupled to the electrical connector, the first communication pin is connected to the second communication pin to form an electrical loop, and the second control unit 221 is communicatively connected to the first control unit 11 .

[0141] like Figure 2 As shown, the electrical interface 12 may be provided with a plurality of pins.

[0142] like Figure 3 As shown, a plurality of pins may also be provided in the electrical connector; when the electrical interface 12 is coupled with the electrical connector, the plurality of pins in the electrical interface 12 may be correspondingly connected with the plurality of pins in the electrical connector, thereby performing energy transfer or signal transfer.

[0143] In the embodiment of this specification, when the electrical interface 12 is coupled to the electrical connector, the first communication pin can be connected to the second communication pin, thereby forming a complete communication link so that the first control unit 11 can communicate with the second control unit 221.

[0144] The first communication pin can be connected to the data transmission pin or signal output pin of the first control unit 11, which can be selected according to actual conditions and is not specifically limited here. The second communication pin can be connected to the data reception pin or signal input pin of the second control unit 221, which can be selected according to actual conditions and is not specifically limited here.

[0145] In practical applications, the TX pin in the electrical interface 12 can be used as the first communication pin, and correspondingly, the TX pin at the corresponding position of the electrical connector can be used as the second communication pin; of course, the RX pin in the electrical interface 12 can be used as the first communication pin, and correspondingly, the RX pin at the corresponding position of the electrical connector can be used as the second communication pin.

[0146] As an implementation method, the two TX pins obliquely symmetrically arranged in the electrical interface 12 can be used as the first communication pins, and correspondingly, the two TX pins obliquely symmetrically arranged in the corresponding position of the electrical connector can be used as the second communication pins. Of course, the two RX pins obliquely symmetrically arranged in the electrical interface 12 can also be used as the first communication pins, and correspondingly, the two RX pins obliquely symmetrically arranged in the corresponding position of the electrical connector can be used as the second communication pins. In this way, the electrical interface 12 and the electrical connector can communicate regardless of whether they are inserted forward or backward.

[0147] In the embodiments of the present specification, the electrical connector and the electrical interface 12 are directly used to realize the wired communication between the first control unit 11 and the second control unit 221. There is no need to select a control unit with a communication function, nor is there any need to configure the control unit with additional wireless communication components, thereby saving resources and costs; at the same time, the success rate of the first control unit 11 sending feedback signals to the second control unit 221 is improved, thereby improving the charging safety of the nursing equipment.

[0148] Optionally, the charging component 2 may be a transmission cable 22 ; and the second control unit 221 may be configured in the transmission cable 22 .

[0149] The transmission cable 22 may be a data cable having charging and data signal transmission functions.

[0150] Optionally, the transmission cable 22 includes wires and electrical connectors.

[0151] The second control unit 221 is configured in the wire; or, The second control unit 221 is configured in the electrical connector.

[0152] In practical applications, the transmission cable 22 may generally include a wire and an electrical connector; in the embodiment of the present specification, the second control unit 221 may be disposed in the wire of the transmission cable 22. Since the wire is generally a flexible structure, in order to avoid damage to the second control unit 221 when the wire is bent, a protective shell for protecting the second control unit 221 may also be disposed on the wire. The second control unit 221 is disposed in the wire to avoid the influence of other electrical components in the transmission cable 22 on the second control unit 221. At the same time, since a protective shell is disposed on the wire, it is also convenient for users to distinguish the transmission cable 22 with a protective function from other cables.

[0153] In addition, the second control unit 221 can also be set in the electrical connector. By setting the second control unit 221 in the electrical connector, the distance between the second control unit 221 and the second communication pin can be closer, thereby effectively simplifying the line structure of the communication cable. And because the electrical connector also includes other circuit structures, setting the second control unit 221 in the electrical connector avoids setting a separate installation position and structure for the second control unit 221, thereby simplifying the structure of the transmission cable 22.

[0154] In addition, when merchants sell the device, the charging component 2 provided may only be the adapter 21.

[0155] Optionally, the charging component 2 is an adapter 21.

[0156] The second control unit 221 is configured in the adapter 21 .

[0157] Since the circuit board in the adapter 21 is relatively large, the second control unit 221 is disposed in the adapter 21, which can facilitate the arrangement of the second control unit 221. It can be understood that in order to ensure that the second control unit 221 in the adapter 21 can communicate with the first control unit 11 by wire, a data line equipped with a communication cable and a first communication pin is required.

[0158] Optionally, the charging component 2 is a transmission cable 22 and an adapter 21 .

[0159] The second control unit 221 is configured in the transmission cable 22; or, The second control unit 221 is configured in the adapter 21 .

[0160] Optionally, the second control unit 221 receives a feedback signal sent by the first control unit 11 via a communication cable; one end of the communication cable is connected to a signal output port of the first control unit 11, and the other end is connected to an acquisition pin of the second control unit 221.

[0161] In the embodiment of this specification, the feedback signal may be a voltage signal or a current signal. The acquisition pin may be a signal input pin or a signal receiving pin in the second control unit 221. After the acquisition pin receives the feedback signal, the second control unit 221 may control the second output port to output a low-level voltage signal or control the second port not to output a voltage signal, thereby making the potential in the charging circuit 223 0.

[0162] Optionally, the acquisition pin is also connected to the first resistor 225; the branch where the communication cable is located is connected in parallel with the branch where the first resistor 225 is located; The acquisition pin is configured to receive a first electrical signal from a first circuit; the first circuit is a circuit including a branch where the first resistor 225 is located and a branch where the communication cable is located.

[0163] It can be understood that if the first control unit 11 does not send a feedback signal to the second control unit 221, the branch where the communication cable is located is an open circuit; the first circuit is the branch where the first resistor 225 is located. If the first control unit 11 sends a feedback signal to the second control unit 221, the branch where the communication cable is located is a through circuit and is connected in parallel with the branch where the first resistor 225 is located; according to the circuit principle, the first circuit is a parallel equivalent circuit of the branch where the first resistor 225 is located and the branch where the communication cable is located.

[0164] In the embodiment of this specification, the first electrical signal may be a voltage-divided signal of the first circuit. When the first control unit 11 does not send a feedback signal to the second control unit 221, since the first circuit is the branch where the first circuit is located, the first electrical signal may be a voltage-divided signal of the first resistor 225. After the first control unit 11 sends a feedback signal to the second control unit 221, since the first circuit is a parallel equivalent circuit of the branch where the first resistor 225 is located and the branch where the communication cable is located, the first electrical signal may be a voltage-divided signal of the parallel equivalent circuit. Since the branch where the communication cable is located is connected in parallel with the branch where the first resistor 225 is located, and the resistance of the communication cable is small, the resistance value of the parallel equivalent circuit is significantly smaller than the resistance value of the first resistor 225, thereby reducing the voltage-divided signal of the first resistor 225. If the second control unit 221 detects that the first electrical signal received by the acquisition pin is less than the preset signal threshold, it can be determined that the acquisition pin has received the feedback signal, and it is determined that there is a conductive foreign body in the electrical interface 12, so that the second port can be controlled to output a corresponding control signal to make the potential in the charging circuit 223 0.

[0165] Optionally, the acquisition pin is an over-temperature protection pin or an over-current protection pin.

[0166] In the embodiment of the present specification, the second control unit 221 may be an integrated chip with over-current protection and / or over-temperature protection, and the second control unit 221 may be provided with an over-current protection pin and / or an over-temperature protection pin.

[0167] If the over-temperature protection pin is used as the acquisition pin; the first resistor 225 can be a fixed-value resistor whose resistance value does not change with temperature; in order to perform over-temperature protection on components, the first resistor 225 can also be a thermistor whose resistance value changes with temperature; specifically, the first resistor 225 can be a negative temperature coefficient thermistor whose resistance value decreases with increasing temperature.

[0168] In the embodiment of the present specification, a second resistor connected in series with the first resistor 225 may be further provided inside the second control unit 221. When the temperature around the second control unit 221 increases, the resistance value of the first resistor 225 decreases with the increase in temperature, thereby reducing the voltage division of the first resistor 225. Therefore, the second control unit 221 can determine whether the ambient temperature is abnormal based on the voltage division signal of the first resistor 225 collected by the collection pin, and output a control signal.

[0169] After the first control unit 11 sends a feedback signal to the second control unit 221, the branch where the communication cable is located is changed from an open circuit to a pass circuit, and is connected in parallel with the branch where the first resistor 225 is located. Since the resistance of the communication cable is small, the resistance value of the first circuit is smaller than the resistance value of the first resistor 225, thereby achieving the purpose of reducing the voltage division of the first resistor 225. In the embodiment of this specification, the feedback signal is transmitted by the communication cable to simulate the situation where the temperature around the second control unit 221 increases, so as to achieve the effect of controlling the second control unit 221 to output a control signal.

[0170] If the overcurrent protection pin is used as the acquisition pin; the first resistor 225 can be a fixed resistor with a constant resistance value; the acquisition pin can receive the current value of the first resistor 225, and this current value can be used as the current value of the protection current; usually the protection current value can be greater than the current of the charging circuit 223; for example, the current value of the charging circuit 223 is 500 mA; the current value of the protection current can be set to 1A or 1.5A. If the current value of the charging circuit 223 is greater than the current value of the protection current, it means that the circuit is abnormal, and the second control unit 221 can control the second port not to output a voltage signal.

[0171] In the embodiment of this specification, a communication cable is used to transmit a feedback signal to simulate a situation where the current value of the charging circuit 223 is greater than the current value of the protection current and the circuit is abnormal, thereby achieving the purpose of controlling the second control unit 221 to output a control signal.

[0172] Optionally, a first electronic switch 2211 is provided inside the second control unit 221, the first port is the input end of the first electronic switch 2211; the second port is the output end of the first electronic switch 2211; the second control unit 221 is also configured to control the first electronic switch 2211 to be disconnected if the second control unit 221 receives the feedback signal.

[0173] In the embodiment of this specification, the input end of the first electronic switch 2211 can be used as the first port of the second control unit 221 ; the output end can be used as the second port of the second control unit 221 .

[0174] The input end of the first electronic switch 2211 is connected to the power supply circuit 222, and the output end of the first electronic switch 2211 is connected to the charging circuit 223; after the power is turned on, if the first electronic switch 2211 is turned on, the power supply circuit 222 and the charging circuit 223 can be connected; the output end of the first electronic switch 2211, that is, the second port of the second control unit 221, can output a high level, so that the charging circuit 223 has an electric potential, and then the nursing device body 1 can be charged. If the first electronic switch 2211 is disconnected, the power supply circuit 222 and the charging circuit 223 are disconnected; so that the output end of the first electronic switch 2211, that is, the second port of the second control unit 221, has no voltage signal output. The first electronic switch 2211 is disconnected, that is, the power supply for the nursing device body 1 or the charging circuit 223 is disconnected, so that the short circuit of the charging circuit 223 at the electrical interface 12 is fundamentally avoided, and the safety of charging the nursing device body is ensured.

[0175] In order to facilitate the on and off control of the first electronic switch 2211, in the embodiment of this specification, the first electronic switch 2211 with a control terminal can be preferably selected. The control terminal can control whether the input terminal and the output terminal of the first electronic switch 2211 are connected, thereby controlling whether the power supply circuit 222 and the charging circuit 223 are connected.

[0176] Optionally, the first electronic switch 2211 may be any one of a MOS tube, a bipolar junction transistor, a field effect tube, and a micro relay.

[0177] In the embodiment of this specification, the second control unit 221 may be an MCU in addition to an integrated chip with special functions.

[0178] Optionally, the first port is a power input port of the second control unit 221 ; the second port is a signal output port of the second control unit 221 .

[0179] In the embodiment of the present specification, the power supply circuit 222 is connected to the power input port of the second control unit 221 to provide power to the second control unit 221, so that the second control unit 221 can work normally.

[0180] The second port is connected to the charging circuit 223; after the second control unit 221 receives the feedback signal sent by the first control unit 11, it can control the second port to output a low-level voltage signal, so that the potential in the charging circuit 223 can be made 0, which is equivalent to cutting off the power supply of the charging circuit 223, and can effectively prevent the charging circuit 223 from short-circuiting at the electrical interface 12, thereby effectively ensuring the safety of charging the nursing device body.

[0181] Figure 4This is a schematic diagram of the overall structure of a detection and protection system provided in an embodiment of this specification. The detection and protection system can be applied to nursing equipment. Figure 4 The detection and protection system includes the following parts: 1. Electrical interface, 2. Detection unit, 3. First control unit, 3. Second control unit, 4. Information prompt component, 5. Second protection circuit.

[0182] The detection and protection principles are as follows: The input port of the second control unit is connected to the power supply circuit, and the output port is connected to the charging circuit. The charging circuit can provide electrical energy to the nursing device body through the electrical interface; the detection unit can obtain the electrical signal of the electrical interface and send the electrical signal to the first control unit through wired communication or wireless communication; the first control unit can determine whether there is a conductive foreign body in the electrical interface according to the electrical signal; since the charging circuit may be short-circuited at the electrical interface if there is a conductive foreign body in the electrical interface, if there is a conductive foreign body in the electrical interface, the first control unit can send a feedback signal to the second control unit so that the second control unit controls the second port not to output a voltage signal or output a low-level voltage signal, so that the potential in the charging circuit is 0, so as to avoid the short circuit and heating of the charging circuit at the electrical interface. While sending the feedback signal to the second control unit, the first control unit can also send a protection instruction to the second protection circuit so that the second protection circuit is turned on, so as to further protect the short circuit circuit at the electrical interface by using the second protection circuit; at the same time, the first control unit can also send a prompt signal to the information prompt component so that the prompt component sends a prompt message to prompt the user.

[0183] Figure 5 This is a schematic diagram of the electrical structure of a detection and protection system provided in an embodiment of this specification. The second control unit is arranged in the transmission cable, and the second control unit is an integrated chip with over-temperature protection.

[0184] like Figure 5 As shown: the second control unit is an integrated chip with over-temperature protection.

[0185] The second control unit is internally provided with a first electronic switch, which may be a MOS tube, which may be turned on or off based on a signal reflecting the temperature collected by the over-temperature protection pin. Specifically, the source S of the MOS tube is the first port of the second control unit, which may be connected to the power supply circuit as an input terminal; the drain D of the MOS tube is the second port of the second control unit, which may be connected to the charging circuit as an output terminal; the gate G of the MOS tube is the control terminal, which may be internally controlled by the second control unit. The second control unit may control whether the MOS tube is turned on through the gate of the MOS tube, thereby controlling whether the power supply circuit and the charging circuit are turned on.

[0186] The second control unit also has an over-temperature protection pin OTP. The over-temperature protection pin OTP is connected to the signal sending pin TX of the first control unit as an acquisition pin through a communication cable to transmit a feedback signal through the communication cable. The over-temperature protection pin OTP is also connected to the first resistor R. The first resistor R can be a negative temperature coefficient thermistor NTC whose resistance value decreases as the temperature increases. After the first control unit sends a feedback signal to the second control unit, the branch where the communication cable is located is open and becomes a passage, and is connected in parallel with the branch where the first resistor is located. Since the resistance of the communication cable is small, the resistance value of the parallel equivalent circuit of the branch where the first resistor R is located and the branch where the communication cable is located is less than the resistance value of the first resistor R. Thereby, it is possible to simulate the scenario of the temperature rising around the second control unit, achieve the purpose of deceiving the temperature rise of the over-temperature protection pin OTP, and then control the second control unit to output a control signal, thereby controlling the first electronic switch to disconnect.

[0187] The sensing circuit in the detection unit and the detection pin in the electrical interface ( Figure 5 The sensing circuit also includes a current source to provide voltage to the sensing circuit, thereby detecting the electrical signal in the electrical interface, and then determining whether there is water at the electrical interface based on the electrical signal.

[0188] The detection unit is connected to the first control unit for communication, and sends the electrical signal obtained by the electrical interface detection to the first control module. The first control unit is also connected to the second control unit, the second protection circuit, and the information prompt component, and sends a signal or instruction to the second control unit, the second protection circuit, and the information prompt component according to the electrical signal sent by the detection unit.

[0189] The source of the MOS tube in the second protection circuit is connected to the power input line VIN in the charging circuit, and the drain is connected to the ground line GND in the charging circuit.

[0190] Under normal circumstances, when the adapter is connected to the power supply, the MOS tube in the second control unit is turned on, so that the power supply circuit and the charging circuit are connected; the voltage of the VIN pin in the electrical interface is 5V, and the detection pin PIN is a low voltage. If the electrical interface is inserted into the electrical connector in a relatively humid environment, the charging circuit may form a short circuit at the electrical interface due to the presence of water in the electrical interface.

[0191] If there is liquid at position 1 (between VIN and PIN), it may cause a short circuit between the detection pin PIN and the VIN pin, thereby causing the voltage on the detection pin PIN to increase. The voltage sampling circuit in the detection unit can be connected to the detection pin PIN and obtain a first voltage signal of the detection pin PIN. The detection unit can send the first voltage signal to the first control unit. If the first control unit determines that the voltage value at the detection pin PIN reaches a preset voltage threshold based on the first voltage signal, it can be determined that there is water at position 1 and that the electrical interface is wet.

[0192] If there is no liquid at position 1, the first control unit can control the current source in the sensing circuit in the detection unit to start; the current source outputs the detection current, and since the sensing circuit and the detection pin PIN and the GND pin form a return circuit, the detection current can pass through the conductive loop formed by the liquid between the detection pin PIN and the GND pin; since there is water at position 2, the impedance between the detection pin PIN and the GND pin in the figure becomes lower; the voltage sampling circuit can obtain the voltage value between the detection pin PIN and the GND pin; the detection unit can send the voltage value between the detection pin PIN and the GND pin and the current value of the current source to the first control unit. If the resistance between the detection pin PIN and the GND pin determined by the first control unit based on the voltage value and current value between the detection pin PIN and the GND pin is less than the preset resistance threshold, it can be determined that there is water at position 2 and that the electrical interface is wet.

[0193] If it is determined that the electrical interface is wet, the first control unit can send a feedback signal to the second control unit; in order to ensure the stability and transmission speed of the feedback signal transmission, the feedback signal can be sent to the control unit in the second control unit through wired communication. After receiving the feedback signal, the second control unit can output a high-level signal or a low-level voltage signal, thereby controlling the source and drain of the MOS tube in the second control unit to be disconnected, so as to control the power supply circuit to be disconnected from the charging circuit, thereby fundamentally cutting off the power supply of the charging circuit.

[0194] On the other hand, the first control unit can also send a protection instruction to the second protection circuit to turn on the MOS tube in the second protection circuit and connect the second protection circuit in parallel with the short-circuited circuit at the electrical interface. Since the internal resistance of the MOS tube is at the milliohm level when it is turned on, which is much smaller than the impedance of the short-circuit loop inside the electrical interface, it can protect the short-circuit circuit at the electrical interface. At the same time, the first control unit can also send a prompt signal to the information prompt component so that the information prompt component can send a prompt message to remind the user that the electrical interface is wet.

[0195] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0196] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A nursing device, characterized in that: The nursing device comprises: a power supply circuit, a charging circuit, a first control unit and a second control unit with a switch control function; The first control unit is configured to send a feedback signal to the second control unit if there is a conductive foreign object in the electrical interface of the nursing device; The first port of the second control unit is connected to the power supply circuit, and the second port of the second control unit is connected to the charging circuit; the second control unit is configured to control the second port of the second control unit not to output a voltage signal or to output a low-level voltage signal after receiving the feedback signal.

2. The nursing device according to claim 1, characterized in that: The first control unit sends the feedback signal to the second control unit via a communication cable; one end of the communication cable is connected to the signal output port of the first control unit, and the other end is connected to the acquisition pin of the second control unit.

3. The nursing device according to claim 2, characterized in that: The acquisition pin is also connected to a first resistor; the branch where the communication cable is located is connected in parallel with the branch where the first resistor is located; The acquisition pin is configured to receive a first electrical signal from a first circuit; the first circuit is a circuit including a branch where the first resistor is located and a branch where the communication cable is located.

4. The nursing device according to claim 3, characterized in that: The acquisition pin is an over-temperature protection pin or an over-current protection pin.

5. The nursing device according to any one of claims 1 to 4, characterized in that: A first electronic switch is arranged inside the second control unit, the first port is the input end of the first electronic switch; the second port is the output end of the first electronic switch; the second control unit is also configured to control the first electronic switch to be disconnected if the second control unit receives the feedback signal.

6. The nursing device according to claim 1 or 2, characterized in that: The first port is a power input port of the second control unit; the second port is a signal output port of the second control unit.

7. The nursing device according to claim 1, characterized in that: At least one pin of the electrical interface is configured as a first communication pin; the first control unit is connected to the first communication pin; The nursing device further comprises a transmission cable having an electrical connector; at least one pin of the electrical connector is configured as a second communication pin; the second control unit is connected to the second communication pin; The electrical interface is coupled to the electrical connector, the first communication pin is connected to the second communication pin to form an electrical circuit, and the second control unit is communicatively connected to the first control unit.

8. The nursing device according to claim 7, characterized in that: The electrical interface is configured to have two first communication pins, the two first communication pins are respectively located at opposite sides of the electrical interface, and / or, The electrical connector is configured to have two second communication pins, and the two second communication pins are respectively located at opposite sides of the electrical connector.

9. The nursing device according to claim 1, characterized in that: The nursing device comprises a transmission cable; the second control unit is configured in the transmission cable.

10. The nursing device according to claim 9, characterized in that: The transmission cable includes wires and electrical connectors; The second control unit is configured in the wire; or, The second control unit is arranged in the electrical connector.

11. The nursing device according to claim 1, characterized in that: The care device comprises an adapter, and the second control unit is arranged in the adapter of the care device.

12. The nursing device according to claim 1, characterized in that: The first control unit is configured in a care device body of the care device.

13. The nursing device according to claim 1, characterized in that: The nursing device also includes a first protection circuit; the first protection circuit is connected to the second control unit and is used to protect the second control unit.

14. The nursing device according to claim 1, characterized in that: The care device further comprises a care component, wherein the care component comprises brush filaments, a nozzle, a brush filament carrier and a brush handle, wherein the brush handle is configured to have a liquid flow channel.

15. The nursing device according to claim 14, characterized in that The care device further comprises a driving component, wherein the driving component comprises a pump component and / or a motor component coupled to the care component.

16. The nursing device according to claim 1, characterized in that The nursing device further comprises a detection unit, which is communicatively connected to the first control unit; the detection unit is configured to send a second electrical signal to the first control unit; the second electrical signal is used to reflect the electrical potential at the first pin in the electrical interface; The first control unit is specifically configured to send the feedback signal to the second control unit if the electric potential exceeds a preset electric potential threshold.

17. The nursing device according to claim 16, characterized in that The detection unit is further configured to send a third electrical signal to the first control unit; the third electrical signal is used to reflect the resistance value between the first pin and the second pin at the electrical interface; The first control unit is specifically configured to send the feedback signal to the second control unit if the resistance value between the first pin and the second pin is less than a preset resistance threshold.

18. The nursing device according to claim 1, characterized in that The nursing device further includes a second protection circuit; the second protection circuit has a second electronic switch, the input end of the second electronic switch is connected to the power input line in the charging circuit, the output end of the second electronic switch is connected to the ground line in the charging circuit; the control end of the second electronic switch is connected to the signal output port of the first control unit; The first control unit is also configured to send a protection instruction to the second protection circuit if there is a conductive foreign object in the electrical interface; the protection instruction is used to control the second electronic switch to turn on.

19. The nursing device according to claim 1, characterized in that: The nursing device body also includes an information prompt component connected to the first control unit; The first control unit is also configured to send a prompt signal to the information prompt component if there is a conductive foreign object in the electrical interface; the information prompt component is used to send prompt information, and the prompt information is used to prompt the user that there is a conductive foreign object in the electrical interface.

20. A charging component, characterized in that: The charging component includes a power supply circuit, a charging circuit, and a second control unit; The first port of the second control unit is connected to the power supply circuit, and the second port of the second control unit is connected to the charging circuit; the second control unit is configured to control the second port of the second control unit not to output a voltage signal or to output a low-level voltage signal if a feedback signal from the first control unit is received; the first control unit is configured to send the feedback signal to the second control unit if there is a conductive foreign object on the electrical interface of the device charged by the charging component; the electrical interface is configured as the electrical connection port of the device.

21. The charging assembly according to claim 20, characterized in that: The charging assembly includes a transmission cable having an electrical connector; At least one pin of the electrical interface is configured as a first communication pin; the first control unit is connected to the first communication pin; At least one pin of the electrical connector is configured as a second communication pin; the second control unit is connected to the second communication pin; The electrical interface is coupled to the electrical connector, the first communication pin is connected to the second communication pin to form an electrical circuit, and the second control unit is communicatively connected to the first control unit.

22. The charging assembly according to claim 20, characterized in that: The charging component is a transmission cable; the second control unit is configured in the transmission cable.

23. The charging assembly according to claim 22, characterized in that: The transmission cable includes wires and electrical connectors; The second control unit is configured in the wire; or, The second control unit is arranged in the electrical connector.

24. The charging assembly according to claim 20, characterized in that: The charging component is an adapter; The second control unit is configured in the adapter.

25. The charging assembly according to claim 20, characterized in that: The charging components are transmission cables and adapters; The second control unit is configured in the transmission cable; or, The second control unit is configured in the adapter.

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