Personal care device

Abstract

The embodiment of the application provides a personal care device, including a body, a massage head for skin care, an MCU including a driving signal module and an ADC module, a humidity detection circuit including a first electrode and a second electrode located at the massage head or the body, and an acquisition circuit connected with the second electrode, wherein the first electrode is connected with the driving signal module, the second electrode is connected with the ADC module through the acquisition circuit to provide the humidity signal of the skin collected to the MCU, the MCU determines a corresponding target voltage interval according to the humidity value represented by the humidity signal, and provides the driving signal to the first electrode through a transmitting circuit. The embodiment of the application detects the humidity value of the skin of the user in real time through the humidity detection circuit, determines the target voltage interval according to the humidity of the skin by using the MCU, provides the corresponding driving signal to the first electrode, outputs the electric pulse matched with the real-time humidity value to the skin, performs effective electric stimulation, and improves the use experience of the user.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of household appliances, and in particular to a personal care device. Background Art

[0002] Currently, personal care appliances that care for the user's skin, such as massage or beauty products, are all set with multiple gears such as high, medium and low for users to choose from, so as to control the level of power output accordingly; the higher the gear, the more power is output, and the lower the gear, the lower the power is output.

[0003] Therefore, current personal care appliances require users to manually adjust the power level during use, which is inconvenient. Furthermore, once a power level is selected, the power output remains constant. However, some users lack the necessary knowledge to select the appropriate power level for their skin, potentially causing skin damage. Summary of the Invention

[0004] In view of the above-mentioned problems existing in the prior art, an embodiment of the present application provides a personal care device, which can automatically adjust the voltage value according to the humidity of the user's skin.

[0005] To solve the above problems, the technical solutions provided in the embodiments of the present application are:

[0006] The present application provides a personal care device, comprising a body, a massage head for skin care, and:

[0007] MCU, which includes a drive signal module and an ADC module;

[0008] A humidity detection circuit includes a first electrode and a second electrode located at the massage head or the body, and an acquisition circuit 101 connected to the second electrode; wherein the first electrode is connected to the drive signal module, and the second electrode is connected to the ADC module via the acquisition circuit 101 to provide the collected skin humidity signal to the MCU;

[0009] The MCU determines a corresponding target voltage range according to the humidity value represented by the humidity signal, and provides a driving signal to the first electrode through the transmitting circuit.

[0010] In some embodiments, the MCU stores a humidity-voltage relationship table, so as to determine a corresponding target voltage range according to the humidity value based on the humidity-voltage relationship table.

[0011] In some embodiments, the voltage value range in the humidity-voltage relationship table is 0V-120V, and the voltage value range is divided into multiple continuous voltage threshold intervals to correspond to multiple continuous humidity threshold intervals.

[0012] In some embodiments, the humidity detection circuit includes at least a diode, which is reversely connected between the ADC module and the second electrode.

[0013] In some embodiments, the acquisition circuit 101 includes a first resistor, and the first resistor is connected between the cathode of the diode and the ADC module.

[0014] In some embodiments, the acquisition circuit 101 further includes a second resistor, one end of the second resistor is connected to the cathode of the diode, and the other end is grounded.

[0015] In some embodiments, the humidity detection circuit further includes a first capacitor connected between the second electrode and the anode of the diode.

[0016] In some embodiments, the humidity detection circuit further includes a third resistor, one end of the third resistor is connected to the anode of the first capacitor, and the other end of the third resistor is grounded.

[0017] In some embodiments, the humidity detection circuit further includes a second capacitor, one end of the second capacitor is connected to the cathode of the diode, and the other end is grounded.

[0018] In some embodiments, the humidity value is obtained at least by a dynamic DSP algorithm.

[0019] The personal care device provided in the embodiment of the present application can detect the humidity value of the user's skin in real time through the humidity detection circuit, and use the MCU to determine the target voltage range that can effectively stimulate the skin according to the humidity of the skin, and provide the corresponding drive signal to the first electrode according to the target voltage period to output electric pulses that are adapted to the real-time humidity value to the skin for effective electrical stimulation, thereby avoiding the user's skin from feeling no sensation or causing skin damage during use, improving the care efficacy of the personal care device, and improving the user's usage experience; at the same time, since the electrical energy parameters of the output electric pulses are controlled based on the target voltage range, there is no need to frequently adjust the drive signal through the MCU when the skin is effectively stimulated, thereby reducing the use burden of the device and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A circuit diagram of a personal care device provided in an embodiment of the present application;

[0021] Figure 2 This is a structural block diagram of the personal care device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0023] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but merely as an example of an embodiment. Other modifications within the scope and spirit of the present application will occur to those skilled in the art.

[0024] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0025] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0026] It should also be understood that although the present application has been described with reference to certain specific examples, those skilled in the art will be able to implement many other equivalent forms of the present application that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0027] The above and other aspects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0028] Specific embodiments of the present application will be described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments described are merely examples of the present application and may be implemented in a variety of ways. Familiar and / or repetitive functions and structures are not described in detail to avoid obscuring the present application with unnecessary or redundant details. Therefore, the specific structural and functional details described herein are not intended to be limiting, but rather serve merely as a basis and representative basis for the claims to teach those skilled in the art to variously utilize the present application with substantially any suitable detailed structure.

[0029] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," which may all refer to one or more of the same or different embodiments according to the present application.

[0030] Current personal care appliances, such as massagers, typically have multiple settings for users to choose from. However, users often lack a clear understanding of their skin conditions and the optimal setting. Furthermore, when the massager is set to a low setting, the user may not feel the effect on their skin, leading them to manually adjust the setting to a higher setting. However, prolonged use of the massager at a high setting that is inappropriate for skin conditions can cause skin damage.

[0031] To solve the above technical problems, an embodiment of the present application provides a personal care device that can detect the moisture of the user's skin and control the output of an adaptive voltage based on the real-time detected humidity, thereby improving the care efficacy of the personal care device and enhancing the user's experience.

[0032] The personal care device provided in the embodiments of the present application includes a body (not shown) and a massage head (not shown) for skin care. In the present application, the shapes of the body and the massage head can be set according to actual needs and are not limited here. The body is provided with a master control circuit, which is used to control the output power parameters to control the massage head.

[0033] Figure 1 FIG. 1 shows a circuit diagram of a personal care device provided in an embodiment of the present application. Figure 1 As shown, the personal care device provided in an embodiment of the present application also includes an MCU and a humidity detection circuit. In this embodiment, the MCU (Microcontroller Unit) includes a drive signal module and an ADC module. The drive signal module is connected to the main control circuit and outputs a drive signal according to the voltage output by the main control circuit. The ADC module is used to collect voltage signals. The humidity detection circuit includes a first electrode and a second electrode, and an acquisition circuit 101 connected to the second electrode. The first electrode and the second electrode can be arranged on the massage head or on the body according to actual needs. The first electrode is connected to the drive signal module for receiving the drive signal sent by the drive signal module. The second electrode is connected to the ADC module through the acquisition circuit 101 to provide the collected skin humidity signal to the MCU. In this application, the first electrode and the second electrode can be metal electrodes or non-metal electrodes, and this application does not limit this.

[0034] In some specific applications of this embodiment, the first electrode and the second electrode are in contact with the user's skin at the same time. When the humidity value of the user's skin is different, the resistance between the first electrode and the second electrode will also change, so that the ADC module can obtain the voltage value of the acquisition circuit 101 as a humidity signal to represent the humidity value of the user's skin.

[0035] After the humidity signal obtained by the ADC module is calculated by the dynamic DSP algorithm (digital algorithm), the MCU determines the humidity value of the current skin corresponding to the humidity signal, and then determines the target voltage interval that can effectively stimulate the skin according to the humidity value of the user's current skin. According to the target voltage interval, the driving signal is provided to the first electrode through the transmitting circuit to output electric pulses to the user's skin for electrical stimulation. The electric energy parameters of the output electric pulses are controlled based on the target voltage interval, so that when the skin is effectively stimulated, there is no need to frequently adjust the driving signal through the MCU. In an embodiment of the present application, the humidity detection circuit may include one or more first electrodes, which is not limited by the present application. When multiple first electrodes are provided, the personal care device provided by the present application can massage multiple skin areas at the same time, further enhancing the user experience.

[0036] The personal care device provided in the embodiment of the present application can detect the humidity value of the user's skin in real time through the humidity detection circuit, and use the MCU to determine the target voltage range that can effectively stimulate the skin according to the humidity of the skin, and provide the corresponding drive signal to the first electrode according to the target voltage period to output electric pulses that are adapted to the real-time humidity value to the skin for effective electrical stimulation, thereby avoiding the user's skin from feeling no sensation or causing skin damage during use, improving the care efficacy of the personal care device, and improving the user's usage experience; at the same time, since the electrical energy parameters of the output electric pulses are controlled based on the target voltage range, there is no need to frequently adjust the drive signal through the MCU when the skin is effectively stimulated, thereby reducing the use burden of the device and extending its service life.

[0037] In actual use, the personal care device provided in the embodiment of the present application is Figure 2 As shown, the MCU is connected to the overall control circuit and acquires the skin's humidity signal through electrodes connected to the humidity detection circuit. Based on the humidity signal, the MCU determines the skin's humidity value using a dynamic DSP algorithm. The MCU then determines the corresponding target voltage range based on the skin's humidity value and outputs a drive signal through the drive signal module. This drives the power supply circuit to maintain the output voltage within the target voltage range. This voltage value within the target voltage range is then supplied to the first electrode via the transmitting circuit, thereby performing an electrical stimulation massage on the human skin.

[0038] In order to more accurately determine the target voltage range that can effectively stimulate the skin based on the humidity value, in some embodiments, the MCU stores a humidity-voltage relationship table to determine the corresponding target voltage range based on the humidity value based on the humidity-voltage relationship table. In this embodiment, considering that when the user's skin humidity is relatively low, the resistance between the first electrode and the second electrode is relatively large during the humidity detection process, therefore, the output voltage needs to be increased to increase the current to avoid the user's skin not feeling anything during use. When the user's skin humidity is relatively high, the resistance between the first electrode and the second electrode is relatively small during the humidity detection process, therefore, the output voltage needs to be reduced to avoid excessive current and excessive electrical stimulation, which may cause stinging on the user's skin. The MCU uses the stored humidity-voltage relationship table based on the determined humidity value to determine the output voltage corresponding to the humidity value, thereby being able to output a voltage that can effectively stimulate the skin based on the humidity of the user's skin, providing a good user experience.

[0039] In some embodiments, as shown in Table 1 below, the voltage value range in the humidity-voltage relationship table is 0V-120V, and the voltage value range is divided into multiple continuous voltage threshold intervals to correspond to multiple continuous humidity threshold intervals. In this embodiment, in order to effectively stimulate the skin electrically, the output voltage value range can be from 0V to 120V. At the same time, to avoid the MCU frequently adjusting the voltage drive signal, the voltage value range is divided into multiple continuous voltage threshold intervals, for example, less than 15V is the first interval, 15V-30V is the second interval, 30V-60V is the third interval, 60V-90V is the fourth interval, and 90V-120V is the fifth interval. At the same time, based on the user's skin humidity range, five continuous humidity threshold intervals are also divided accordingly, for example, >70% is the first interval, 55%-70% is the second interval, 40%-55% is the third interval, 25%-40% is the fourth interval, and 10%-25% is the fifth interval. As the skin humidity value increases, the corresponding output voltage value needs to be smaller, and a plurality of consecutive voltage threshold intervals are mapped one-to-one to a plurality of consecutive humidity threshold intervals.

[0040] Number of groups Skin moisture Corresponding output voltage 1 10％-25％ 90v-120v 2 25％-40％ 60v-90v 3 40％-55％ 30v-60v 4 55％-70％ 15v-30v 5 ＞70％ ＜15V

[0041] Table 1 Humidity voltage relationship table

[0042] In some embodiments, the humidity detection circuit includes at least a diode D1, which is reversely connected between the ADC module and the second electrode. In this embodiment, the cathode of diode D1 is connected to the acquisition circuit 101, and the anode of diode D1 is connected to the second electrode. After rectification by diode D1, the output voltage is used by the ADC module to acquire the voltage signal through the acquisition circuit.

[0043] In some embodiments, the acquisition circuit 101 includes a first resistor R1 connected between the cathode of the diode D1 and the ADC module. In this embodiment, the resistance of the first resistor R1 can be several hundred ohms to 1000 ohms to limit the current and protect the ADC module.

[0044] In some embodiments, the acquisition circuit 101 further includes a second resistor R2, one end of the second resistor R2 is connected to the cathode of the diode D1, and the other end is grounded. In this embodiment, the second resistor R2 is used to divide the voltage to protect the ADC module.

[0045] In some embodiments, the humidity detection circuit further includes a first capacitor C1 connected between the second electrode and the anode of the diode D1. In this embodiment, the first capacitor C1 performs filtering and energy storage to ensure signal stability during detection by the ADC module.

[0046] In some embodiments, the humidity detection circuit further includes a third resistor R3, one end of the third resistor R3 is connected to the anode of the first capacitor C1, and the other end is grounded. In this embodiment, the third resistor R3 is used for voltage division to eliminate some interference signals.

[0047] In some embodiments, the humidity detection circuit further includes a second capacitor C2, one end of which is connected to the cathode of the diode D1 and the other end is grounded. In this embodiment, the second capacitor C2 is connected in parallel between the acquisition circuit 101 and the diode D1 to provide filtering.

[0048] In some practical applications, the MCU sends an electrical pulse through the first electrode, and then the humidity detection circuit transmits the humidity signal corresponding to the voltage value back to the ADC module through the second electrode. The MCU determines the humidity value of the skin through a dynamic DSP algorithm.

[0049] In some embodiments, the humidity value is obtained at least by a dynamic DSP algorithm.

[0050] In this embodiment, the MCU determines the skin humidity value based on the voltage collected by the ADC module through a dynamic DSP algorithm. For example, the first electrode outputs a PWM voltage of 5V, a duty cycle of 50%, and the input voltage U1 is known, such as 2.5V. After the return flow through the human body, the MCU detects that the voltage U0 at the ADC is known, such as 0.25V. The human body resistance is R0, and the current passing through the human body can be calculated using formula (1).

[0051] U0=U1*(R0 / (R0+R1+R2)) (1)

[0052] According to formula (1), the calculation formula (2) of human body resistance R0 can be obtained.

[0053] R0=U0(R1+R2) / (U1-U0) (2)

[0054] In general, the human body resistance can be considered as 1000 ohms to 2000 ohms, and the corresponding skin humidity range is 0% to 100%. From this, the human body humidity value can be obtained. The corresponding relationship formula with the human body resistance R0 is (3),

[0055]

[0056] According to the above derivation, combined with formula (2) and formula (3), the calculation formula (4) of humidity can be determined according to the voltage received by the second electrode, and the humidity value of the skin can be determined using formula (4):

[0057]

[0058] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. A personal care device, comprising a body and a massage head for skin care; characterized in that: Also includes: MCU, which includes a drive signal module and an ADC module; a humidity detection circuit comprising a first electrode and a second electrode located at the massage head or the body, and an acquisition circuit connected to the second electrode; wherein the first electrode is connected to the drive signal module, and the second electrode is connected to the ADC module via the acquisition circuit to provide the acquired skin humidity signal to the MCU; The MCU determines a corresponding target voltage range based on the humidity value represented by the humidity signal, and provides a drive signal to the first electrode through the transmitting circuit to output electric pulses to the user's skin for electrical stimulation. The electrical energy parameters of the output electric pulses are controlled within the target voltage range, so that when the skin is electrically stimulated, there is no need to frequently adjust the drive signal through the MCU. Among them, when the user's skin humidity is less than the first humidity value, the output voltage and current are increased to increase the intensity of electrical stimulation; when the user's skin humidity is greater than the second humidity value, the output voltage and current are reduced to reduce the intensity of electrical stimulation.

2. The personal care device according to claim 1, wherein The MCU stores a humidity-voltage relationship table, so as to determine a corresponding target voltage range according to the humidity value based on the humidity-voltage relationship table.

3. The personal care device according to claim 2, characterized in that The voltage value range in the humidity-voltage relationship table is 0V-120V, and the voltage value range is divided into multiple continuous voltage threshold intervals to correspond to multiple continuous humidity threshold intervals.

4. The personal care device according to claim 1, wherein The humidity detection circuit at least includes a diode, and the diode is reversely connected between the ADC module and the second electrode.

5. The personal care device according to claim 4, characterized in that The acquisition circuit includes a first resistor, which is connected between the cathode of the diode and the ADC module.

6. The personal care device according to claim 5, characterized in that The acquisition circuit further includes a second resistor, one end of which is connected to the cathode of the diode, and the other end of which is grounded.

7. The personal care device according to claim 4, characterized in that The humidity detection circuit further includes a first capacitor connected between the second electrode and the anode of the diode.

8. The personal care device according to claim 7, characterized in that The humidity detection circuit further includes a third resistor, one end of the third resistor is connected to the anode of the first capacitor, and the other end of the third resistor is grounded.

9. The personal care device according to claim 4, characterized in that The humidity detection circuit further includes a second capacitor, one end of the second capacitor is connected to the cathode of the diode, and the other end is grounded.

10. The personal care device according to any one of claims 1 to 9, characterized in that The humidity value is obtained at least by a dynamic DSP algorithm.

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