Nursing equipment and energy charging assembly

Abstract

The utility model 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] This utility model relates to the technical field of nursing devices, and in particular to a nursing device and a charging component. Background Technology

[0002] Electric toothbrushes, shavers, and other personal care devices inevitably come into contact with water during use. Improper use by users may cause water to seep into the charging port. Furthermore, these devices are usually placed in bathrooms, where the humidity is high, which may also allow moisture to seep into the charging port. This could lead to a short circuit inside the charging port during charging, and if the device continues to charge, it could even cause the charging port to melt or even cause a fire hazard.

[0003] Currently, no truly secure solution has been proposed to address the aforementioned issues. Utility Model Content

[0004] This specification provides a nursing device and a charging component to address the charging safety issues present in existing nursing devices.

[0005] To solve the above-mentioned technical problems, the embodiments in this specification are implemented as follows:

[0006] A nursing device, the nursing device comprising: a power supply circuit, a charging circuit, a first control unit, and a second control unit having a switching control function;

[0007] The first control unit is configured to send a feedback signal to the second control unit if a conductive foreign object is present in the electrical interface of the nursing device;

[0008] 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, upon receiving the feedback signal, control the second port of the second control unit to not output a voltage signal or to output a low-level voltage signal.

[0009] A charging component, the charging component including a power supply circuit, a charging circuit, and a second control unit;

[0010] 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 it receives a feedback signal from the first control unit; the first control unit is configured to send the feedback signal to the second control unit if there is a conductive foreign object in the electrical interface of the device being charged by the charging component; the electrical interface is configured as the electrical connection port of the device.

[0011] At least one embodiment of this invention achieves the following beneficial effects: by connecting a second control unit with switching control function in series between the power supply circuit and the charging circuit, the second control unit controls whether there is a potential in the charging circuit. If the second control unit receives a feedback signal sent by the first control unit, it controls the second port 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 to the charging circuit is disconnected, avoiding short circuits in the charging circuit at the electrical interface and improving the safety of device charging. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of a nursing device provided in the embodiments of this specification;

[0014] Figure 2 This is a schematic diagram of an electrical interface provided in an embodiment of this specification;

[0015] Figure 3 This is a schematic diagram of an electrical connector provided in the embodiments of this specification;

[0016] Figure 4 This is a schematic diagram of the overall structure of a detection and protection system provided in the embodiments of this specification;

[0017] Figure 5 This is a schematic diagram of the electrical structure of a detection and protection system provided in the embodiments of this specification.

[0018] Figure label:

[0019] 1. Nursing equipment body; 11. First control unit; 12. Electrical interface; 13. Detection unit; 14. Second protection circuit;

[0020] 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 Implementation

[0021] To make the objectives, 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 conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of them. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of one or more embodiments of this specification.

[0022] The technical solutions provided in the various embodiments of this specification are described in detail below with reference to the accompanying drawings.

[0023] Figure 1 This is a structural schematic diagram of a nursing device provided in an embodiment of this specification. Figure 1 As shown, the nursing device provided in this 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 switching control function.

[0024] The first control unit 11 can 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.

[0025] 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.

[0026] In the embodiments of this 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, electric hair clipper, electric facial cleanser, electric dental flosser, 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 disposed in the charging component 2.

[0027] The first port can be an input port in the second control unit 221, and the second port can be an output port in the second control unit 221.

[0028] The power supply circuit 222 and the charging circuit 223 can be circuits used to charge the nursing device body 1. The power supply circuit 222 can be a circuit connected to a power source; specifically, the power supply circuit 222 can refer to the circuit between the power source and the first port. The charging circuit 223 can be a circuit connected to the nursing device body 1; specifically, the charging circuit 223 can be the 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 to the charging circuit, that is, disconnecting the charging power supply to the nursing device body 1.

[0029] The first control unit 11 and the second control unit 221 can be either a circuit board or an MCU. The first control unit 11 and the second control unit 221 can be of the same type or different models.

[0030] In this embodiment of the specification, the electrical interface 12 can be located 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.

[0031] In the embodiments described in this specification, the feedback signal can be used to reflect the presence of conductive foreign matter in the electrical interface 12; the conductive foreign matter can be conductive liquid, conductive solid, etc.

[0032] If a conductive foreign object is present in the electrical interface 12 during charging, it may cause a short circuit in the charging circuit 223 at the electrical interface 12, which could damage the electrical interface 12 or the nursing device body 1, and in severe cases, may even cause a fire. Therefore, if a conductive foreign object is detected in the electrical interface 12 during charging, certain protective measures need to be taken.

[0033] In practical applications, the first control unit 11 and the second control unit 221 can communicate wirelessly or via wired connection.

[0034] In this embodiment of the 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. This results in no output voltage in the charging circuit 223, effectively disconnecting the power supply to the charging circuit 223 that charges the nursing device body 1, thereby fundamentally ensuring the safety of charging the nursing device.

[0035] In practical applications, wireless communication is easily affected by electromagnetic waves and other external factors, which may affect signal transmission speed and stability, resulting in poor communication reliability. In order to ensure that the second control unit 221 can receive the feedback signal sent by the first control unit 11 and ensure the safety of charging the nursing device, the embodiments of this specification can preferentially use wired communication.

[0036] 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.

[0037] In the embodiments described in this specification, the feedback signal can be a voltage signal or a current signal. The acquisition pin can be a signal input pin or a signal receiving pin in the second control unit 221. After receiving the feedback signal at the acquisition pin, the second control unit 221 can 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 zero.

[0038] In this embodiment of the specification, a specific circuit connection structure for receiving feedback signals by the acquisition pin of the second control unit 221 is also provided.

[0039] Optionally, the acquisition pin can also be 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.

[0040] The acquisition pin can be configured to receive a first electrical signal from a first circuit; the first circuit is a circuit including the branch where the first resistor 225 is located and the branch where the communication cable is located.

[0041] In the embodiments described in this specification, the feedback signal sent by the first control unit 11 to the second control unit 221 can be a low-level signal.

[0042] Understandably, if the first control unit 11 does not send a feedback signal to the second control unit 221, the branch containing the communication cable is an open circuit; the first circuit is the branch containing the first resistor 225. If the first control unit 11 sends a feedback signal to the second control unit 221, the branch containing the communication cable is a closed circuit and is connected in parallel with the branch containing the first resistor 225; according to circuit principles, the first circuit is an equivalent circuit of the parallel connection of the branch containing the first resistor 225 and the branch containing the communication cable.

[0043] In this embodiment, the first electrical signal can be a voltage divider 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 can be a voltage divider signal of the first resistor 225. When 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 can be a voltage divider signal of the parallel equivalent circuit. Since the branch where the communication cable is located is 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 divider 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 a preset signal threshold, it can determine that the acquisition pin has received a feedback signal and determine that there is a conductive foreign object in the electrical interface 12, thereby controlling the second port to output a corresponding control signal so that the potential in the charging circuit 223 is 0.

[0044] Optionally, the acquisition pin can be an over-temperature protection pin or an over-current protection pin.

[0045] In the embodiments of this specification, the second control unit 221 may be an integrated chip with overcurrent protection and / or overtemperature protection, and the second control unit 221 may be provided with overcurrent protection pins and / or overtemperature protection pins.

[0046] If the over-temperature protection pin is used as the acquisition pin, the first resistor 225 can be a fixed resistor whose resistance value does not change with temperature. In order to provide over-temperature protection for the 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 as the temperature rises.

[0047] In this embodiment, the second control unit 221 may also contain a second resistor connected in series with the first resistor 225. When the ambient temperature around the second control unit 221 rises, the resistance of the first resistor 225 decreases with the increase in temperature, resulting in a decrease in the voltage drop across the first resistor 225. Therefore, the second control unit 221 can determine whether the ambient temperature is abnormal based on the voltage drop signal of the first resistor 225 acquired by the acquisition pin, and thus output a control signal.

[0048] After the first control unit 11 sends a feedback signal to the second control unit 221, the branch containing the communication cable changes from an open circuit to a closed circuit and is connected in parallel with the branch containing the first resistor 225. Because the resistance of the communication cable is relatively small, the resistance value of the first circuit is less than that of the first resistor 225, thereby reducing the voltage drop across the first resistor 225. This simulates a scenario where the voltage drop decreases due to over-temperature, causing the second control unit 221 to determine over-temperature and initiate power-off protection. In this embodiment, the communication cable is used to transmit a feedback signal to simulate a temperature rise around the second control unit 221, thus achieving the effect of controlling the output control signal of the second control unit 221.

[0049] 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, which can be used as the protection current value. Typically, the protection current value can be greater than the current of the charging circuit 223; for example, if the current value of the charging circuit 223 is 500 mA, the protection current value can be set to 1 A or 1.5 A. If the current value of the charging circuit 223 is greater than the protection current value, it indicates a circuit malfunction, and the second control unit 221 can control the second port not to output a voltage signal.

[0050] In this embodiment, after the first control unit 11 sends a feedback signal to the second control unit 221, the branch containing the communication cable changes from an open circuit to a closed circuit and is connected in parallel with the branch containing the first resistor 225. Based on the electrical signal acquired by the acquisition pin, the second control unit 221 determines that the resistance value of the first resistor 225 is less than a preset value, and therefore determines that the circuit is overcurrent and requires power-off protection. This achieves the effect of using the feedback signal transmitted via the communication cable to simulate a scenario where the current value of the charging circuit 223 exceeds the protection current, resulting in a circuit malfunction. This allows the second control unit 221 to output a control signal.

[0051] Optionally, the second control unit 221 may be provided with a first electronic switch 2211, the first port may be the input terminal of the first electronic switch 2211; the second port may be the output terminal of the first electronic switch 2211; the second control unit 221 is further configured to control the first electronic switch 2211 to open if the second control unit 221 receives the feedback signal.

[0052] In the embodiments described in this specification, the input terminal of the first electronic switch 2211 can be used as the first port of the second control unit 221; the output terminal can be used as the second port of the second control unit 221.

[0053] The input terminal of the first electronic switch 2211 is connected to the power supply circuit 222, and the output terminal of the first electronic switch 2211 is connected to the charging circuit 223. When 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 terminal of the first electronic switch 2211, i.e., the second port of the second control unit 221, can output a high level, thereby enabling the charging circuit 223 to have a potential, which can then charge the nursing device body 1. If the first electronic switch 2211 is turned off, the power supply circuit 222 and the charging circuit 223 are disconnected, resulting in no voltage signal output at the output terminal of the first electronic switch 2211, i.e., the second port of the second control unit 221. The turning off of the first electronic switch 2211 disconnects the power supply to the nursing device body 1 or the charging circuit 223, thereby fundamentally preventing a short circuit in the charging circuit 223 at the electrical interface 12 and ensuring the safety of charging the nursing device body.

[0054] To facilitate the control of the on / off state of the first electronic switch 2211, in this embodiment, a first electronic switch 2211 with a control terminal can be preferentially selected. The control terminal can control whether the input and output terminals of the first electronic switch 2211 are connected, thereby controlling whether the power supply circuit 222 and the charging circuit 223 are connected.

[0055] Optionally, the first electronic switch 2211 can be any one of a MOSFET, a bipolar junction transistor, a field-effect transistor, or a miniature relay.

[0056] The following explanation uses the first electronic switch 2211 as a MOSFET.

[0057] The source (S) of the MOSFET can serve 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 MOSFET can serve 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 MOSFET can be internally controlled by the second control unit 221 as a control terminal. The second control unit 221 can control whether the MOSFET is turned on by controlling the gate (G) of the MOSFET.

[0058] Understandably, when the MOSFET is an NMOS transistor, the second control unit 221 can control the MOSFET to turn off by outputting a low-level voltage signal. When the MOSFET is a PMOS transistor, the second control unit 221 can control the MOSFET to turn off by outputting a high-level signal.

[0059] In the embodiments described in this specification, the second control unit 221 can also be an MCU.

[0060] Optionally, the first port can be the power input port of the second control unit 221; the second port can be the signal output port of the second control unit 221.

[0061] In this embodiment of the 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.

[0062] The second port is connected to the charging circuit 223. After receiving the feedback signal sent by the first control unit 11, the second control unit 221 can control the second port to output a low-level voltage signal, so that the potential in the charging circuit 223 is 0, which is equivalent to cutting off the power supply of the charging circuit 223. This 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.

[0063] In this embodiment of the specification, a structure for an electrical interface 12 that enables wired communication between the first control unit 11 and the second control unit 221 is also provided.

[0064] Optionally, 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.

[0065] The nursing device may also include a transmission cable 22 with an electrical connector; 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.

[0066] The electrical interface 12 is coupled to the electrical connector, the first communication pin and the second communication pin are connected to form an electrical circuit, and the second control unit 221 is communicatively connected to the first control unit 11.

[0067] Figure 2 This is a schematic diagram of an electrical interface provided for an embodiment of this specification. Figure 2 As shown, electrical interface 12 can have multiple pins.

[0068] Figure 3 This is a schematic diagram of an electrical connector provided for an embodiment of this specification. Figure 3 As shown, electrical connectors can also have multiple pins.

[0069] When the electrical interface 12 is coupled to the electrical connector, multiple pins in the electrical interface 12 can be connected to multiple pins in the electrical connector to perform energy transfer or signal transfer.

[0070] In the embodiments described in 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 to form a complete communication link, enabling the first control unit 11 to communicate with the second control unit 221. The first communication pin can be connected to either the data transmission pin or the signal output pin of the first control unit 11, and the specific choice can be made according to the actual situation, without specific limitations here. The second communication pin can be connected to the acquisition pin of the second control unit 221; the specific choice can be made according to the actual situation, without specific limitations here.

[0071] In practical applications, the TX pin in electrical interface 12 can be used as the first communication pin, and the corresponding TX pin in the electrical connector can be used as the second communication pin; of course, the RX pin in electrical interface 12 can also be used as the first communication pin, and the corresponding RX pin in the electrical connector can be used as the second communication pin.

[0072] In one implementation, the two symmetrically arranged TX pins in electrical interface 12 can be used as the first communication pins, and correspondingly, the two symmetrically arranged TX pins in the corresponding positions of the electrical connector can be used as the second communication pins. Alternatively, the two symmetrically arranged RX pins in electrical interface 12 can be used as the first communication pins, and correspondingly, the two symmetrically arranged RX pins in the corresponding positions of the electrical connector can be used as the second communication pins. Therefore, communication can be achieved between electrical interface 12 and the electrical connector regardless of whether they are plugged in the correct orientation.

[0073] In this embodiment, wired communication between the first control unit 11 and the second control unit 221 is achieved directly using electrical connectors and electrical interfaces 12. There is no need to select a control unit with communication function, nor is it necessary to configure wireless communication components for the control unit, thus saving resources and costs. At the same time, it improves the success rate of the first control unit 11 sending feedback signals to the second control unit 221, thereby improving the charging safety of the nursing device.

[0074] Optionally, the electrical interface 12 may be configured to have two first communication pins, which may be located on opposite sides of the electrical interface 12, and / or...

[0075] The electrical connector may be configured to have two second communication pins, which may be located on opposite sides of the electrical connector.

[0076] In the embodiments described in this specification, the electrical interface 12 may include two first communication pins, and the two first communication pins may be arranged at an angle, such as... Figure 2The first communication pin can be either TX or RX. Both first communication pins can be connected to the signal transmission pins of the first control unit 11. Alternatively, only one first communication pin can be provided in the electrical interface 12.

[0077] The electrical connector may also include two second communication pins, and these two second communication pins may be angled, such as... Figure 3 The TX or RX pins can both be connected to the signal receiving pins of the second control unit 221. Alternatively, only one second communication pin can be provided in the electrical connector.

[0078] In the embodiments of this specification, at least one of the electrical interface 12 and the electrical connector is provided with two communication pins, and the two communication pins are set at an angle. This allows the electrical connector to be connected to the electrical interface 12 without having to identify the orientation, thus improving ease 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 electrical connector is connected to the electrical interface 12 in the wrong direction, thereby improving the charging safety of the nursing device.

[0079] In practical applications, when selling equipment, merchants may only equip it with the transmission cable 22 as the charging component 2.

[0080] Optionally, the care device may include a transmission cable 22; the second control unit 221 may be configured within the transmission cable 22.

[0081] The transmission cable 22 can be a data cable with charging and data or signal transmission functions.

[0082] Optionally, the transmission cable 22 may include wire and electrical connectors.

[0083] The second control unit 221 is disposed in the wire; or,

[0084] The second control unit 221 is configured in the electrical connector.

[0085] In practical applications, the transmission cable 22 typically includes wire and electrical connectors; in this embodiment, the second control unit 221 can be disposed within the wire of the transmission cable 22. Since the wire is usually a flexible structure, a protective shell can also be provided on the wire to protect the second control unit 221 from damage when the wire is bent. Disposing of the second control unit 221 within the wire avoids interference from other electrical components in the transmission cable 22. Simultaneously, the protective shell on the wire makes it easier for users to distinguish the protective transmission cable 22 from other cables.

[0086] Alternatively, the second control unit 221 can also be housed within the electrical connector. This placement allows the second control unit 221 to be closer to the second communication pin, effectively simplifying the communication cable's wiring structure. Furthermore, since the electrical connector also includes other circuitry, this placement avoids the need for a separate installation location and structure for the second control unit 221, further simplifying the structure of the transmission cable 22.

[0087] In addition, when the merchant sells the equipment, the charging component 2 may only be the adapter 21.

[0088] Optionally, the care device may include an adapter 21, and the second control unit 221 may be configured within the adapter 21 of the care device.

[0089] Since the circuit board inside the adapter 21 is relatively large, placing the second control unit 221 inside the adapter 21 facilitates its arrangement. Understandably, to ensure wired communication between the second control unit 221 and the first control unit 11 within the adapter 21, a data transmission line equipped with a communication cable and a first communication pin is required.

[0090] In practical applications, the first control unit 11 can be configured within the nursing device body 1 of the nursing device.

[0091] In practical applications, the control unit may be damaged when it is threatened by overvoltage, overcurrent, surge, etc. Therefore, in order to protect the second control unit 221, this specification embodiment also provides a protection circuit for protecting the second control unit 221.

[0092] 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.

[0093] 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 under conditions such as overvoltage, overcurrent, surge, and electromagnetic interference. The specific structure of the first protection circuit 224 is not specifically limited here.

[0094] The first protection circuit 224 protects the second control unit 221, preventing damage and ensuring its normal operation. For example, it ensures the second control unit 221 can receive feedback signals from the first control unit 11 and output corresponding control signals, further guaranteeing the safety of the nursing device during charging.

[0095] Optionally, the care device may further include a care component, which may include bristles, a nozzle, a bristle carrier, and a brush handle, the brush handle being configured to have a liquid flow channel.

[0096] In the embodiments of this specification, the nursing device can be an electric shaver, electric hair clipper, electric facial cleanser, electric dental flosser, or a composite oral care device with brushing and flossing functions. The nursing components may include brush bristles for brushing teeth and nozzles for flossing teeth.

[0097] The nozzle can be integrally formed with the bristle carrier, or it can be separately mounted on the bristle carrier or separately mounted on the brush handle. The nozzle can be partially or completely arranged around the bristle area, or it can be set relatively independently from the bristle area.

[0098] In the embodiments described in this specification, the liquid channel may be a passage located inside the brush handle for the flossing fluid to pass through. The flossing fluid can reach the nozzle through the liquid channel and be ejected from the nozzle.

[0099] To achieve the effects of brushing and rinsing teeth, dental care devices often include drive components.

[0100] Optionally, the care device may further include a drive assembly, which may include a pump assembly and / or a motor assembly coupled to the care assembly.

[0101] In the embodiments described in this 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, through the motor shaft, can drive the brush bristles in the care assembly to reciprocate or rotate.

[0102] The pump assembly can be a power unit that pumps the oral irrigating fluid to the nozzle. Specifically, the motor shaft can be a hollow shaft; one end of the hollow part of the motor shaft can be connected to the output end of the pump assembly, and the other end can be connected to the liquid flow channel of the brush handle. Under the power of the pump assembly, the oral irrigating fluid can enter the hollow part of the motor shaft, pass through the liquid flow channel at the brush handle, reach the nozzle, and provide a jet to the user's mouth, thereby achieving oral cleaning.

[0103] In practical applications, combined oral care devices with brushing and flossing functions can be used individually or together. The device itself may also have a button for the user to select the oral cleaning mode.

[0104] This embodiment also provides specific details on detecting whether there are conductive foreign objects in the electrical interface 12.

[0105] 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 potential at the first pin in the electrical interface 12.

[0106] The first control unit 11 can be specifically configured to send the feedback signal to the second control unit 221 if the potential exceeds a preset potential threshold.

[0107] In practical applications, the detection unit 13 can communicate with the first control unit 11 via serial communication. Specifically, the first control unit 11 can communicate with the second control unit 221 via at least one of the following communication methods: SPI, IIC, RS232, and RS485.

[0108] In the embodiments described in this specification, the first pin can be any of the electrical interface 12 except for the power input pin. Specifically, the first pin can be a pin in the electrical interface 12 closest to the power input pin VBUS, for example, the first pin can be the SBU1 pin, such as... Figure 2 or Figure 3 As shown.

[0109] Because the electrical interface 12 is small in size, in environments such as bathrooms, the entire or most of the electrical interface 12 can easily be covered by water, causing a short circuit between the first pin and the power input pin VBUS, thus increasing the potential of the first pin. Therefore, the presence of conductive foreign objects in the electrical interface 12 can be detected by detecting the potential of the first pin.

[0110] In this embodiment of the specification, the detection unit 13 may include a first voltage acquisition circuit for detecting the 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 a preset potential threshold, it means that there may be a conductive foreign object in the electrical interface 12. 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 output of a control signal from the second port based on the feedback signal. If the potential at 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.

[0111] In the embodiments 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.

[0112] 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.

[0113] Specifically, the first control unit 11 can be 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.

[0114] In the embodiments described in this specification, the second pin and the first pin can be arranged adjacent to each other or spaced apart; for example, the second pin can be a ground pin (GND pin).

[0115] In practical applications, the detection unit 13 may also 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; the current source may be turned on by the first control unit 11 when the potential of the first pin is less than a preset potential threshold.

[0116] The second voltage acquisition circuit can be configured to detect the voltage value between the first pin and the second pin; the second electrical signal may include the current value and the 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.

[0117] The first control unit 11 can be specifically configured as follows:

[0118] The resistance value between the first pin and the second pin is determined based on the current value and the voltage value between the first pin and the second pin.

[0119] 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.

[0120] In the embodiments described in this specification, the current source can be used to provide voltage to the return circuit. Within the circuit's safety range, the current value output by the current source can be customized according to actual needs. Specifically, the current value can be set to 1uA, 10uA, 100uA, 1mA, etc.

[0121] In practical applications, the second voltage acquisition circuit can be an ADC voltage sampling circuit; the second voltage acquisition circuit can be the same as the first voltage acquisition circuit; or a separate voltage sampling circuit can be used. The second voltage acquisition circuit can be used to detect the voltage value between the first pin and the second pin.

[0122] In practical applications, if the potential of the first pin does not exceed the preset potential threshold, the first control unit 11 can control the current source in the return circuit to turn on, so as to power on the return circuit.

[0123] The presence of conductive foreign matter between the first and second pins will cause a short circuit between them, thus reducing the resistance between them. Therefore, the presence of conductive foreign matter between the first and second pins can be determined based on the resistance value between them.

[0124] In practical applications, the first control unit 11 can calculate the resistance between the first and second pins based on the current value and the voltage value between the first and second pins. In another embodiment, the second electrical signal may include the resistance value calculated by the sensing circuit based on the current value and the voltage value between the first and second pins. That is, the sensing circuit can directly calculate the resistance value, avoiding the need for the first control unit 11 to recalculate after receiving the current and voltage values ​​from the sensing circuit.

[0125] If the resistance value determined by the first control unit 11 is less than a preset resistance threshold, it indicates that there is a conductive foreign object between the first pin and the second pin, resulting in a decrease in the resistance between the first pin and the second pin. Therefore, the first control unit 11 can send a feedback signal to the second control unit 221 so that the second control unit 221 can disconnect the power supply for charging the nursing device body 1.

[0126] If the resistance value between the first pin and the second pin is greater than or equal to the preset resistance threshold, it indicates that the resistance between the first pin and the second pin is normal, thus confirming that there is no conductive foreign object between the first pin and the second pin; therefore, it is not necessary to send a feedback signal to the second control unit 221.

[0127] Furthermore, when the current output by the current source is only a fixed current, the second electrical signal may only include the voltage value between the first and second pins detected by the second voltage acquisition circuit. Since the current value remains constant, if the voltage value between the first and second pins is less than a preset value, it can also indicate whether there is a conductive foreign object between the first and second pins.

[0128] In this embodiment of the specification, since the user may also use other charging components 2 to charge the nursing device body 1; in order to avoid damage to the electrical interface 12 or the nursing device body 1 caused by conductive foreign objects in the electrical interface 12 during charging, a protection circuit can also be set at the nursing device body 1 to further protect the charging safety of the nursing device body 1.

[0129] Optionally, the nursing device may further include a second protection circuit 14; the second protection circuit 14 has a second electronic switch, the input terminal of the second electronic switch can be connected to the power input line in the charging circuit 223, the output terminal of the second electronic switch can be connected to the ground line in the charging circuit 223; the control terminal of the second electronic switch is connected to the signal output port of the first control unit 11.

[0130] The first control unit 11 can also be configured to send a protection command to the second protection circuit 14 if there is a conductive foreign object in the electrical interface 12; the protection command is used to control the second electronic switch to turn on.

[0131] In the embodiments of this specification, the second electronic switch in the second protection circuit 14 can be an electronic switch with low internal resistance when turned on. For example, the second electronic switch can be a MOSFET, whose internal resistance is in the milliohm range when turned on.

[0132] In practical 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, it will cause the charging circuit 223 to short-circuit at the electrical interface 12. In this embodiment of the specification, the input terminal 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 terminal is connected to the ground line GND in the charging circuit 223, so that the circuit short-circuited 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. This can prevent the short-circuit loop inside the electrical interface 12 from continuously heating up, and thus prevent the electrical interface 12 from melting.

[0133] If there is a conductive foreign object in the electrical interface 12, a prompt message can be sent to the user so that the user is aware of it and can take appropriate measures.

[0134] Optionally, the nursing device body 1 also includes an information prompting component connected to the first control unit 11.

[0135] The first control unit 11 can also be configured to send a prompt signal to the information prompting component if there is a conductive foreign object in the electrical interface 12; the information prompting component is used to issue a prompt message to the user that there is a conductive foreign object in the electrical interface 12.

[0136] The first control unit 11 is further configured to send a prompt signal to the information prompting component if a conductive foreign object is present in the electrical interface 12; the information prompting component is used to issue a prompt message to the user that a conductive foreign object is present in the electrical interface 12.

[0137] The information prompt component can 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 can be a signal that controls the display screen to show text prompt information. If the prompt component is an indicator light, the prompt signal can be a signal that controls the indicator light to light up in a preset color or flash at a preset frequency.

[0138] The information prompt component can also be a voice prompt component; if the prompt component is a voice prompt component, the prompt signal can be a signal that controls the voice prompt component to output voice prompt information.

[0139] The information prompt component can also be a motor; if the prompt component is a motor, the prompt signal can be a signal that controls the motor vibration.

[0140] As an optional implementation, this specification also provides a charging component 2 for addressing charging safety issues present in existing nursing devices.

[0141] The charging component 2 may include a power supply circuit 222, a charging circuit 223, and a second control unit 221.

[0142] 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 it receives a feedback signal from the first control unit 11. 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 in the electrical interface 12 of the device being charged by the charging component 2. The electrical interface 12 is configured as the electrical connection port of the device.

[0143] In this embodiment, the power supply circuit 222 and the charging circuit 223 can be circuits used to charge the nursing device body 1. The power supply circuit 222 can be a circuit connected to a power source. Specifically, the power supply circuit 222 can refer to the circuit between the power source and the first port. The charging circuit 223 can be a circuit connected to the nursing device body 1. Specifically, the charging circuit 223 can be the 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 to the charging circuit, that is, disconnecting the charging power supply to the nursing device body 1.

[0144] The first control unit 11 and the second control unit 221 can be either a circuit board or an MCU. The first control unit 11 and the second control unit 221 can be of the same type or different models.

[0145] In this embodiment of the specification, the electrical interface 12 can be located 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.

[0146] In the embodiments described in this specification, the feedback signal can be used to reflect the presence of conductive foreign matter in the electrical interface 12; the conductive foreign matter can be conductive liquid, conductive solid, etc.

[0147] If a conductive foreign object is present in the electrical interface 12 during charging, it may cause a short circuit in the charging circuit 223 at the electrical interface 12, which could damage the electrical interface 12 or the nursing device body 1, and in severe cases, may even cause a fire. Therefore, if a conductive foreign object is detected in the electrical interface 12 during charging, certain protective measures need to be taken.

[0148] In practical applications, the first control unit 11 and the second control unit 221 can communicate wirelessly or via wired connection.

[0149] In this embodiment of the 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 that charges the nursing device body 1 is disconnected, thereby fundamentally ensuring the safety of charging the nursing device.

[0150] Optionally, the charging component 2 includes a transmission cable 22 with an electrical connector.

[0151] 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.

[0152] 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.

[0153] The electrical interface 12 is coupled to the electrical connector, the first communication pin and the second communication pin are connected to form an electrical circuit, and the second control unit 221 is communicatively connected to the first control unit 11.

[0154] like Figure 2 As shown, electrical interface 12 can have multiple pins.

[0155] like Figure 3 As shown, the electrical connector may also have multiple pins; when the electrical interface 12 is coupled to the electrical connector, the multiple pins in the electrical interface 12 can be connected to the multiple pins in the electrical connector to perform energy transfer or signal transfer.

[0156] In the embodiments of this specification, when the electrical interface 12 is coupled with 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.

[0157] The first communication pin can be connected to either the data transmission pin or the signal output pin of the first control unit 11, and the specific choice can be made according to the actual situation. No specific limitation is made here. The second communication pin can be connected to either the data reception pin or the signal input pin of the second control unit 221; the specific choice can be made according to the actual situation. No specific limitation is made here.

[0158] In practical applications, the TX pin in electrical interface 12 can be used as the first communication pin, and the corresponding TX pin in the electrical connector can be used as the second communication pin; of course, the RX pin in electrical interface 12 can also be used as the first communication pin, and the corresponding RX pin in the electrical connector can be used as the second communication pin.

[0159] In one implementation, the two symmetrically arranged TX pins in electrical interface 12 can be used as the first communication pins, and correspondingly, the two symmetrically arranged TX pins in the corresponding positions of the electrical connector can be used as the second communication pins. Alternatively, the two symmetrically arranged RX pins in electrical interface 12 can be used as the first communication pins, and correspondingly, the two symmetrically arranged RX pins in the corresponding positions of the electrical connector can be used as the second communication pins. Therefore, communication can be achieved between electrical interface 12 and the electrical connector regardless of whether they are plugged in the correct orientation.

[0160] In this embodiment, wired communication between the first control unit 11 and the second control unit 221 is achieved directly using electrical connectors and electrical interfaces 12. There is no need to select a control unit with communication function, nor is it necessary to configure wireless communication components for the control unit, thus saving resources and costs. At the same time, it improves the success rate of the first control unit 11 sending feedback signals to the second control unit 221, thereby improving the charging safety of the nursing device.

[0161] Optionally, the charging component 2 can be a transmission cable 22; the second control unit 221 can be configured in the transmission cable 22.

[0162] The transmission cable 22 can be a data cable with charging and data signal transmission functions.

[0163] Optionally, the transmission cable 22 includes wire and electrical connectors.

[0164] The second control unit 221 is disposed in the wire; or,

[0165] The second control unit 221 is configured in the electrical connector.

[0166] In practical applications, the transmission cable 22 typically includes wire and electrical connectors; in this embodiment, the second control unit 221 can be disposed within the wire of the transmission cable 22. Since the wire is usually a flexible structure, a protective shell can also be provided on the wire to protect the second control unit 221 from damage when the wire is bent. Disposing of the second control unit 221 within the wire avoids interference from other electrical components in the transmission cable 22. Simultaneously, the protective shell on the wire makes it easier for users to distinguish the protective transmission cable 22 from other cables.

[0167] Alternatively, the second control unit 221 can also be housed within the electrical connector. By placing the second control unit 221 within the electrical connector, the distance between the second control unit 221 and the second communication pin can be reduced, effectively simplifying the wiring structure of the communication cable. Furthermore, since the electrical connector also includes other circuit structures, placing the second control unit 221 within the electrical connector avoids the need for a separate installation location and structure for the second control unit 221, simplifying the structure of the transmission cable 22.

[0168] In addition, when the merchant sells the equipment, the charging component 2 may only be the adapter 21.

[0169] Optionally, the charging component 2 is an adapter 21.

[0170] The second control unit 221 is configured within the adapter 21.

[0171] Since the circuit board inside the adapter 21 is relatively large, placing the second control unit 221 inside the adapter 21 facilitates its arrangement. Understandably, to ensure wired communication between the second control unit 221 and the first control unit 11 within the adapter 21, a data line equipped with a communication cable and a first communication pin is required.

[0172] Optionally, the charging component 2 is a transmission cable 22 and an adapter 21.

[0173] The second control unit 221 is disposed within the transmission cable 22; or,

[0174] The second control unit 221 is configured within the adapter 21.

[0175] Optionally, the second control unit 221 receives feedback signals sent by the first control unit 11 via a communication cable; one end of the communication cable is connected to the signal output port of the first control unit 11, and the other end is connected to the acquisition pin of the second control unit 221.

[0176] In the embodiments described in this specification, the feedback signal can be a voltage signal or a current signal. The acquisition pin can be a signal input pin or a signal receiving pin in the second control unit 221. After receiving the feedback signal at the acquisition pin, the second control unit 221 can 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 zero.

[0177] Optionally, the acquisition pin is also connected to the first resistor 225; the branch containing the communication cable is connected in parallel with the branch containing the first resistor 225;

[0178] The acquisition pin is configured to receive a first electrical signal from a first circuit; the first circuit is a circuit including the branch where the first resistor 225 is located and the branch where the communication cable is located.

[0179] Understandably, if the first control unit 11 does not send a feedback signal to the second control unit 221, the branch containing the communication cable is an open circuit; the first circuit is the branch containing the first resistor 225. If the first control unit 11 sends a feedback signal to the second control unit 221, the branch containing the communication cable is a closed circuit and is connected in parallel with the branch containing the first resistor 225; according to circuit principles, the first circuit is an equivalent circuit of the parallel connection of the branch containing the first resistor 225 and the branch containing the communication cable.

[0180] In this embodiment, the first electrical signal can be a voltage divider 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 can be a voltage divider signal of the first resistor 225. When 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 can be a voltage divider signal of the parallel equivalent circuit. Since the branch where the communication cable is located is 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 divider 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 a preset signal threshold, it can determine that the acquisition pin has received a feedback signal and determine that there is a conductive foreign object in the electrical interface 12, thereby controlling the second port to output a corresponding control signal so that the potential in the charging circuit 223 is 0.

[0181] Optionally, the acquisition pin is an over-temperature protection pin or an over-current protection pin.

[0182] In the embodiments of this specification, the second control unit 221 may be an integrated chip with overcurrent protection and / or overtemperature protection, and the second control unit 221 may be provided with overcurrent protection pins and / or overtemperature protection pins.

[0183] If the over-temperature protection pin is used as the acquisition pin, the first resistor 225 can be a fixed resistor whose resistance value does not change with temperature. In order to provide over-temperature protection for the 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 as the temperature rises.

[0184] In this embodiment of the specification, the second control unit 221 may also contain a second resistor connected in series with the first resistor 225. When the ambient temperature around the second control unit 221 rises, the resistance value of the first resistor 225 decreases with the increase in temperature, thereby reducing the voltage drop across the first resistor 225. Therefore, the second control unit 221 can determine whether the ambient temperature is abnormal based on the voltage drop signal of the first resistor 225 acquired by the acquisition pin, and thus output a control signal.

[0185] After the first control unit 11 sends a feedback signal to the second control unit 221, the branch containing the communication cable changes from an open circuit to a closed circuit and is connected in parallel with the branch containing the first resistor 225. Because the resistance of the communication cable is relatively small, the resistance value of the first circuit is less than that of the first resistor 225, thereby reducing the voltage drop across the first resistor 225. In this embodiment, the feedback signal is transmitted via the communication cable to simulate a temperature rise around the second control unit 221, thus achieving the effect of controlling the output control signal of the second control unit 221.

[0186] 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, which can be used as the protection current value. Typically, the protection current value can be greater than the current of the charging circuit 223; for example, if the current value of the charging circuit 223 is 500 mA, the protection current value can be set to 1 A or 1.5 A. If the current value of the charging circuit 223 is greater than the protection current value, it indicates a circuit malfunction, and the second control unit 221 can control the second port not to output a voltage signal.

[0187] In this embodiment of the specification, a feedback signal is transmitted using a communication cable to simulate a scenario where the current value of the charging circuit 223 is greater than the protection current value, resulting in a circuit malfunction. This allows the second control unit 221 to output a control signal.

[0188] Optionally, the second control unit 221 is internally provided with a first electronic switch 2211, the first port being the input terminal of the first electronic switch 2211; the second port being the output terminal of the first electronic switch 2211; the second control unit 221 is further configured to control the first electronic switch 2211 to open if the second control unit 221 receives the feedback signal.

[0189] In the embodiments described in this specification, the input terminal of the first electronic switch 2211 can be used as the first port of the second control unit 221; the output terminal can be used as the second port of the second control unit 221.

[0190] The input terminal of the first electronic switch 2211 is connected to the power supply circuit 222, and the output terminal of the first electronic switch 2211 is connected to the charging circuit 223. When 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 terminal of the first electronic switch 2211, i.e., the second port of the second control unit 221, can output a high level, thereby enabling the charging circuit 223 to have a potential, which can then charge the nursing device body 1. If the first electronic switch 2211 is turned off, the power supply circuit 222 and the charging circuit 223 are disconnected, resulting in no voltage signal output at the output terminal of the first electronic switch 2211, i.e., the second port of the second control unit 221. The turning off of the first electronic switch 2211 disconnects the power supply to the nursing device body 1 or the charging circuit 223, thereby fundamentally preventing a short circuit in the charging circuit 223 at the electrical interface 12 and ensuring the safety of charging the nursing device body.

[0191] To facilitate the control of the on / off state of the first electronic switch 2211, in this embodiment, a first electronic switch 2211 with a control terminal can be preferentially selected. The control terminal can control whether the input and output terminals of the first electronic switch 2211 are connected, thereby controlling whether the power supply circuit 222 and the charging circuit 223 are connected.

[0192] Optionally, the first electronic switch 2211 can be any one of a MOSFET, a bipolar junction transistor, a field-effect transistor, or a miniature relay.

[0193] In the embodiments described in this specification, the second control unit 221 can be an integrated chip with special functions or an MCU.

[0194] Optionally, the first port is the power input port of the second control unit 221; the second port is the signal output port of the second control unit 221.

[0195] In this embodiment of the 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.

[0196] The second port is connected to the charging circuit 223. After receiving the feedback signal sent by the first control unit 11, the second control unit 221 can control the second port to output a low-level voltage signal, so that the potential in the charging circuit 223 is 0, which is equivalent to cutting off the power supply of the charging circuit 223. This 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.

[0197] 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 As shown. The detection and protection system includes the following components:

[0198] 1. Electrical interface; 2. Detection unit; 3. First control unit; 4. Second control unit; 5. Information prompting component; 6. Second protection circuit.

[0199] The detection and protection principle is as follows:

[0200] 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 power to the nursing device body through the electrical interface. The detection unit can acquire the electrical signal of the electrical interface and send the electrical signal to the first control unit through wired or wireless communication. The first control unit can determine whether there is a conductive foreign object in the electrical interface based on the electrical signal. Since the presence of a conductive foreign object in the electrical interface may cause a short circuit in the charging circuit, if a conductive foreign object is present, 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 to output a low-level voltage signal, thereby making the potential in the charging circuit zero and avoiding short circuit and overheating at the electrical interface. While sending the feedback signal to the second control unit, the first control unit can also send a protection command to the second protection circuit to activate the second protection circuit, thereby using the second protection circuit to further protect the short 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 prompt component can issue a prompt message to the user.

[0201] 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 disposed in the transmission cable and is an integrated chip with over-temperature protection.

[0202] like Figure 5 As shown: The second control unit is an integrated chip with over-temperature protection.

[0203] The second control unit internally incorporates a first electronic switch, which can be a MOSFET (Metal-Oxide-Semiconductor Transistor). The MOSFET can be turned on or off based on a temperature signal acquired from an over-temperature protection pin. Specifically, the source (S) of the MOSFET serves as the first port of the second control unit, acting as an input connected to the power supply circuit; the drain (D) of the MOSFET serves as the second port of the second control unit, acting as an output connected to the charging circuit; and the gate (G) of the MOSFET is the control terminal, which can be internally controlled by the second control unit. The second control unit can control whether the MOSFET is turned on via its gate, thereby controlling whether the power supply and charging circuits are connected.

[0204] The second control unit also has an over-temperature protection pin (OTP). The OTP, acting as a data acquisition pin, is connected to the signal transmission pin (TX) of the first control unit via a communication cable to transmit feedback signals. The OTP is also connected to a first resistor (R). The first resistor (R) can be a negative temperature coefficient thermistor (NTC) whose resistance decreases with increasing temperature. When the first control unit sends a feedback signal to the second control unit, the branch containing the communication cable changes from an open circuit to a closed circuit, and is connected in parallel with the branch containing the first resistor. Because the communication cable has low resistance, the resistance of the equivalent circuit formed by the parallel connection of the branch containing the first resistor (R) and the branch containing the communication cable is less than the resistance of the first resistor (R). This simulates a temperature increase around the second control unit, deceiving the OTP into raising its temperature, and thus controlling the second control unit to output a control signal, thereby controlling the first electronic switch to open.

[0205] The sensing circuit in the detection unit and the detection pins in the electrical interface ( Figure 5 The PIN and GND pins are connected. The sensing circuit also includes a current source to provide voltage to the sensing circuit, thereby detecting electrical signals in the electrical interface and determining whether there is water at the electrical interface based on the electrical signals.

[0206] The detection unit is communicatively connected to the first control unit and sends the electrical signals detected from the electrical interface to the first control module. The first control unit is also connected to the second control unit, the second protection circuit, and the information prompting component, and sends signals or instructions to the second control unit, the second protection circuit, and the information prompting component based on the electrical signals sent by the detection unit.

[0207] In the second protection circuit, the source of the MOSFET 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.

[0208] Under normal circumstances, when the adapter is connected to a power source, the MOSFET in the second control unit is turned on, connecting the power supply circuit and the charging circuit; the VIN pin voltage in the electrical interface is 5V, and the detection pin PIN is at a low voltage. If the electrical connector is inserted in a humid environment, the presence of water in the electrical interface may cause a short circuit in the charging circuit at the electrical interface.

[0209] If liquid is present at position 1 (between VIN and PIN), it may cause a short circuit between the detection pin PIN and the VIN pin, resulting in an increase in voltage on the detection pin PIN. The voltage sampling circuit in the detection unit can be connected to the detection pin PIN and acquire the 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, based on the first voltage signal, that the voltage value at the detection pin PIN reaches a preset voltage threshold, it can determine that water is present at position 1 and that the electrical interface is damp.

[0210] If there is no liquid at position 1, the first control unit can activate the current source in the sensing circuit of the detection unit. The current source outputs a detection current. Since the sensing circuit and the detection pin PIN and 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 GND pin. Because there is water at position 2, the impedance between the detection pin PIN and GND pin in the diagram becomes lower. The voltage sampling circuit can obtain the voltage value between the detection pin PIN and GND pin. The detection unit can send the voltage value between the detection pin PIN and GND pin and the current value of the current source to the first control unit. If the resistance between the detection pin PIN and GND pin, determined by the first control unit based on the voltage value and current value, is less than a preset resistance threshold, it can be determined that there is water at position 2 and that the electrical interface is damp.

[0211] If the electrical interface is determined to be damp, the first control unit can send a feedback signal to the second control unit. To ensure the stability and speed of the feedback signal transmission, the feedback signal can be sent to the control unit in the second control unit via 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 MOSFET in the second control unit to disconnect from the charging circuit in the power supply circuit, thus fundamentally cutting off the power supply to the charging circuit.

[0212] On the other hand, the first control unit can also send a protection command to the second protection circuit to turn on the MOSFET 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 MOSFET is in the milliohm range when turned on, which is much smaller than the impedance of the short-circuit loop inside the electrical interface, it can protect the short-circuited circuit at the electrical interface. Simultaneously, the first control unit can also send a warning signal to the information prompting component, so that the information prompting component can issue a warning message to remind the user that the electrical interface is damp.

[0213] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0214] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

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

2. The nursing equipment 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 equipment according to claim 2, characterized in that, The acquisition pin is also connected to the first resistor; the branch containing the communication cable is connected in parallel with the branch containing the first resistor; The acquisition pin is configured to receive a first electrical signal from a first circuit; the first circuit is a circuit that includes the branch containing the first resistor and the branch containing the communication cable.

4. The nursing equipment 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, The second control unit is internally provided with a first electronic switch, the first port being the input terminal of the first electronic switch; the second port being the output terminal of the first electronic switch; the second control unit is also configured to control the first electronic switch to open 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 the power input port of the second control unit; the second port is the signal output port of the second control unit.

7. The nursing equipment 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 also includes a transmission cable with 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 and the second communication pin are connected to form an electrical circuit, and the second control unit is communicatively connected to the first control unit.

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

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

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

11. The nursing equipment according to claim 1, characterized in that, The nursing device includes an adapter, and the second control unit is configured within the adapter of the nursing device.

12. The nursing equipment according to claim 1, characterized in that, The first control unit is disposed within the nursing device body of the nursing device.

13. The nursing equipment 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 equipment according to claim 1, characterized in that, The nursing device also includes a nursing component comprising bristles, a nozzle, a bristle carrier, and a brush handle, the brush handle being configured to have a liquid flow channel.

15. The nursing device according to claim 14, characterized in that, The nursing device also includes a drive assembly, which includes a pump assembly and / or a motor assembly coupled to the nursing assembly.

16. The nursing equipment according to claim 1, characterized in that, The nursing device further includes 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 potential at a 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 potential exceeds a preset potential threshold.

17. The nursing equipment according to claim 16, characterized in that, The detection unit is also 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 equipment 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 terminal of the second electronic switch is connected to the power input line in the charging circuit, the output terminal of the second electronic switch is connected to the ground line in the charging circuit; the control terminal 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 command to the second protection circuit if a conductive foreign object is present in the electrical interface; the protection command is used to control the second electronic switch to turn on.

19. The nursing equipment according to claim 1, characterized in that, The nursing device body also includes an information prompting component connected to the first control unit; The first control unit is further configured to send a prompt signal to the information prompting component if a conductive foreign object is present in the electrical interface; the information prompting component is used to issue a prompt message to the user that a conductive foreign object is present 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 it receives a feedback signal from the first control unit; the first control unit is configured to send the feedback signal to the second control unit if there is a conductive foreign object in the electrical interface of the device being charged by the charging component; the electrical interface is configured as the electrical connection port of the device.

21. The charging component according to claim 20, characterized in that, The charging assembly includes a transmission cable with 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 and the second communication pin are connected to form an electrical circuit, and the second control unit is communicatively connected to the first control unit.

22. The charging component 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 component according to claim 22, characterized in that, The transmission cable includes wire and electrical connectors; The second control unit is disposed in the wire; or, The second control unit is configured in the electrical connector.

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

25. The charging component according to claim 20, characterized in that, The charging components are a transmission cable and an adapter; The second control unit is configured within the transmission cable; or, The second control unit is configured within the adapter.

Images