Beauty instrument

Abstract

The utility model discloses a beauty instrument which comprises a shell, a container, a driving device and a control device. The container is arranged in the shell and comprises a liquid bin and a piston, the liquid bin is provided with a liquid outlet, the piston is slidably arranged in the liquid bin, and a liquid storage cavity is formed between the piston and the liquid bin; the driving device is arranged on the shell, connected with the piston and used for driving the piston to slide towards the liquid outlet of the liquid bin; the control device is electrically connected with the driving device and is at least used for outputting a first driving signal or a second driving signal to the driving device and controlling the driving device to correspondingly act on the piston with the first thrust or the second thrust; wherein the first thrust is only enough to push the piston to move so that the liquid storage cavity can exhaust air but not enough to push the piston to move so that liquid can flow out of the liquid storage cavity, and the second thrust is enough to push the piston to move so that liquid can flow out of the liquid storage cavity. According to the technical scheme, uniform liquid outlet of the beauty instrument can be accurately controlled.

Description

Technical Field

[0001] This application relates to the field of beauty equipment technology, and in particular to a beauty device. Background Technology

[0002] With the continuous improvement of people's living standards, the demand for skin care is increasing, driving the rapid development of the beauty device market. Currently, various types of beauty devices are available on the market, among which those focusing on hydrating skincare have received widespread attention. These devices typically consist of three parts: a casing, a driving mechanism, and a hydrating gel. The hydrating gel contains skincare ingredients such as essence or nutrient solution. The driving mechanism moves a piston, squeezing the liquid from the outlet and applying it to the skin to achieve a skincare effect.

[0003] However, existing beauty devices of this type have a significant problem: when the device is used up and turned off, the drive unit automatically resets to separate from the piston. Without the support of the drive unit, the piston is prone to movement, allowing air to enter the water-light capsule through the outlet during the off-time period. This means that when the device is restarted, the drive unit pushes the piston to dispensing liquid, potentially causing an uneven dispensing of the liquid due to a mixture of air and liquid. This uneven dispensing makes it difficult to precisely control the amount of liquid dispensed from the water-light capsule by controlling the piston's movement, thus affecting the skincare effect and user experience. Utility Model Content

[0004] The main purpose of this application is to provide a beauty device that enables precise control of the uniform liquid output.

[0005] To achieve the above objectives, the beauty device proposed in this application includes:

[0006] case;

[0007] A container is disposed on the shell, the container includes a liquid tank and a piston, the liquid tank is provided with a liquid outlet, the piston is slidably disposed on the liquid tank, and a liquid storage cavity is formed between the piston and the liquid tank;

[0008] A driving device is provided in the housing, the driving device is connected to the piston, and is used to drive the piston to slide toward the liquid outlet of the liquid tank;

[0009] A control device electrically connected to the drive device is configured to output a first drive signal or a second drive signal to the drive device, thereby controlling the drive device to apply a first thrust or a second thrust to the piston. The first thrust is sufficient to move the piston to expel air from the reservoir, but insufficient to move the piston to discharge liquid from the reservoir. The second thrust is sufficient to move the piston to discharge liquid from the reservoir.

[0010] In some embodiments, the control device includes a microprocessor and a drive circuit, the microprocessor being electrically connected to the drive circuit, the drive circuit being electrically connected to the drive device, and the microprocessor being used to control the drive circuit to output the first drive signal or the second drive signal to the drive device.

[0011] In some embodiments, when the beauty device is turned on, the control device first outputs a first drive signal of a preset duration to the drive device, and then switches to outputting the second drive signal.

[0012] In some embodiments, the liquid tank is provided with a sponge component installed inside the liquid outlet;

[0013] And / or,

[0014] The liquid tank is equipped with a sponge sheet to seal the liquid outlet.

[0015] In some embodiments, the liquid outlet is located on the end wall of the first end of the liquid tank.

[0016] In some embodiments, the liquid outlet is located on the side wall of the first end of the liquid tank, and the liquid outlet is close to the inner end face of the first end of the liquid tank;

[0017] Alternatively, the liquid outlet may be located at the junction of the side wall and the end wall at the first end of the liquid tank.

[0018] In some embodiments, the driving device includes a motor, a lead screw, and a nut push rod. The nut push rod is capable of pushing the piston to slide towards the outlet within the liquid tank. The lead screw is threadedly connected to the nut push rod. The motor is connected to the lead screw and drives the lead screw to rotate, causing the nut push rod to slide relative to the housing, thereby driving the piston to slide.

[0019] In some embodiments, the second end of the liquid tank is open, and the motor, the lead screw, the nut push rod and the piston are distributed sequentially along the sliding direction of the piston, with the nut push rod abutting against the side of the piston facing away from the liquid storage chamber;

[0020] And / or,

[0021] The motor is a stepper motor.

[0022] In some embodiments, the beauty device further includes a posture detection device electrically connected to the control device for feeding back the posture of the beauty device to the control device;

[0023] And / or,

[0024] The beauty device also includes a prompting device, which is electrically connected to the control device and is used to output corresponding prompting information according to the signal from the control device.

[0025] In some embodiments, the housing is provided with a mounting cavity, one end of which has an opening, the liquid tank is disposed in the mounting cavity, and the liquid outlet is located outside the mounting cavity.

[0026] The beauty device technical solution of this application includes a shell, a container, a driving device, and a control device. The container is disposed in the shell and includes a liquid tank and a piston. The liquid tank has a liquid outlet, and the piston is slidably disposed in the liquid tank, forming a liquid storage chamber between the piston and the liquid tank. The driving device is disposed in the shell and is connected to the piston for driving the piston to slide toward the liquid outlet of the liquid tank. The control device is electrically connected to the driving device and is used to output a first driving signal or a second driving signal to the driving device, controlling the driving device to act on the piston with a first thrust or a second thrust. The first thrust is only sufficient to push the piston to move so that the liquid storage chamber is vented, but not sufficient to push the piston to move so that the liquid storage chamber is discharged. The second thrust is sufficient to push the piston to move so that the liquid storage chamber is discharged. That is, the first thrust is less than the second thrust. Thus, when the beauty device is started, the control device can first output a first drive signal, causing the drive device to push the piston with a small first thrust to expel all the air in the liquid storage chamber from the liquid outlet. After the air is expelled, the control device outputs a second drive signal, causing the drive device to push the piston with a larger second thrust to expel liquid from the liquid outlet of the liquid storage chamber. Since there is no air in the liquid storage chamber when the drive device pushes the piston with the second thrust, the uniform liquid output of the beauty device can be precisely controlled according to the displacement of the piston driven by the second thrust. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of the beauty device of this application;

[0029] Figure 2 This is a schematic diagram of the circuit module of an embodiment of the beauty device of this application;

[0030] Figure 3 This is a schematic cross-sectional view of the liquid tank of a beauty device according to this application.

[0031] Figure 4This is a cross-sectional view of the liquid tank of the beauty device of this application.

[0032] Figure 5 This is a cross-sectional view of the liquid tank of the beauty device of this application in three embodiments;

[0033] Figure 6 This is a schematic diagram of the circuit module of the second embodiment of the beauty device of this application. Detailed Implementation

[0034] The technical solutions in the embodiments of this application will be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0035] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0036] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0037] Currently, when a beauty device is used and turned off, the drive unit automatically resets and separates from the piston. Without the support of the drive unit, the piston is prone to movement. Therefore, during the shutdown period, air may enter the water-light capsule through the outlet. When the device is restarted and the drive unit moves the piston to dispense liquid, a mixture of air and liquid is discharged, resulting in uneven dispensing. This makes it impossible to precisely control the amount of liquid dispensed from the water-light capsule by controlling the piston's movement, affecting skincare effects and user experience. To address these problems with existing beauty devices, the inventors of this application propose a new solution that effectively solves the problem of uneven liquid dispensing, which makes it difficult to precisely control the amount of liquid dispensed from the water-light capsule by controlling the piston's movement.

[0038] Reference Figures 1 to 5 In this embodiment, the beauty device includes a housing (not shown in the figure), a container 10, a drive device 20, and a control device 30, with the container 10 and the drive device 20 both located in the housing.

[0039] The container 10 includes a liquid tank 11 and a piston 12. The liquid tank 11 has a liquid outlet 101. The piston 12 is slidably disposed in the liquid tank 11, forming a liquid storage chamber 102 between the piston 12 and the liquid tank 11. The liquid storage chamber 102 is used to hold skin care liquids such as essences and nutrients. A driving device 20 is connected to the piston 12 and is used to drive the piston 12 to slide towards the liquid outlet 101 of the liquid tank 11, so as to push the skin care liquid in the liquid tank 11 out of the liquid outlet 101. The liquid tank 11 can be a cylindrical shape with a circular, square, or other shapes. In this embodiment, the liquid tank 11 is shown as a cylindrical shape.

[0040] The control device 30 is electrically connected to the drive device 20. The control device 30 is at least used to output a first drive signal or a second drive signal to the drive device 20. When the control device 30 outputs the first drive signal to the drive device 20, the drive device 20 is controlled to act on the piston 12 with a first thrust. When the control device 30 outputs the second drive signal to the drive device 20, the drive device 20 is controlled to act on the piston 12 with a second thrust. The first thrust is less than the second thrust. The first thrust is only sufficient to move the piston 12 to expel gas from the liquid storage chamber 102, but not sufficient to move the piston 12 to discharge liquid from the liquid storage chamber 102. The second thrust is sufficient to move the piston 12 to discharge liquid from the liquid storage chamber 102. The first drive signal and the second drive signal can refer to either a drive voltage or a drive current, with the first drive signal being less than the second drive signal.

[0041] In this embodiment of the beauty device, upon startup or upon receiving an air purging command (e.g., an air purging button is provided on the beauty device, and the user generates an air purging command by triggering the air purging button), the control device 30 outputs a first drive signal, causing the drive device 20 to act on the piston 12 with a first thrust. At this time, because there is air in the liquid storage chamber 102, the resistance experienced by the piston 12 is less than the first thrust. The drive device 20 pushes the piston 12 to slide in the liquid reservoir 11 with the first thrust, squeezing the air in the liquid storage chamber 102 out of the liquid outlet 101. After the air in the liquid storage chamber 102 is completely purged, the resistance experienced by the piston 12 is greater than the first thrust, and the drive device 20 can no longer push the piston 12 to continue sliding in the liquid reservoir 11 with the first thrust. The liquid outlet 101 of the liquid storage chamber 102... 1. No liquid will be dispensed; after the air is purged (e.g., 2 seconds after purging) or when a treatment start command is received (e.g., the beauty device has a treatment start button, and the user generates a treatment start command by triggering the treatment start button), the control device 30 outputs a second drive signal, causing the drive device 20 to act on the piston 12 with a second thrust. At this time, there is no air in the liquid storage chamber 102, but the second thrust is greater than the resistance encountered by the piston 12. Therefore, the drive device 20 pushes the piston 12 to continue sliding in the liquid tank 11 through the second thrust, so that liquid is dispensed from the outlet 101 of the liquid storage chamber 102. It can also be controlled to move the piston 12 at a uniform speed when the drive device 20 pushes it with the second thrust, so that the outlet 101 of the liquid storage chamber 102 dispenses liquid at a uniform speed, thus achieving a uniform liquid dispensing speed of the beauty device.

[0042] In some embodiments, the control device 30 can be pre-set with the output sequence and timing of the first drive signal and the second drive signal. When the beauty device is turned on (i.e., when the power-on signal is received), the control device 30 first outputs the first drive signal for a preset duration to the drive device 20, and then switches to outputting the second drive signal. That is, the drive device 20 first acts on the piston 12 with the first thrust for a preset duration, and then switches to acting on the piston 12 with the second thrust. The preset duration can be reasonably set according to the actual test results, for example, it can be 1 second, 2 seconds, 3 seconds, etc., to ensure that the first thrust of the drive device 20 drives the piston 12 to completely expel the air in the liquid storage chamber 102 within the preset duration. After the control device 30 outputs the first drive signal to the drive device 20 for a preset duration, it assumes that the drive device 20 has driven the piston 12 to completely expel the air from the liquid storage chamber 102. At this time, it automatically switches to outputting the second drive signal, so that the drive device 20 switches to a second thrust acting on the piston 12, driving the piston 12 to move and evenly discharge liquid from the outlet 101 of the liquid storage chamber 102, so that the beauty device can begin skincare. Of course, in some other embodiments, the control device 30 may also output the first drive signal first, and during the output of the first drive signal, detect whether the piston 12 has stopped moving. When the piston 12 stops moving, it confirms that the air expulsion from the liquid storage chamber 102 is complete, and then switches to outputting the second drive signal, so that liquid begins to discharge from the outlet 101 of the liquid storage chamber 102. Alternatively, the control device 30 may also use other means to determine the switching timing between outputting the first drive signal and outputting the second drive signal.

[0043] In this embodiment of the beauty device, the control device 30 can output a first driving signal or a second driving signal to the driving device 20. The first driving signal causes the driving device 20 to act on the piston 12 with a small first thrust, which is enough to push the piston 12 to move and exhaust the liquid storage chamber 102, but not enough to push the piston 12 to move and release liquid from the liquid storage chamber 102. The second driving signal causes the driving device 20 to act on the piston 12 with a larger second thrust, which is enough to push the piston 12 to move and release liquid from the liquid storage chamber 102. Thus, when the beauty device is started, the control device 30 can first output a first drive signal, causing the drive device 20 to push the piston 12 with a small first thrust to expel all the air in the liquid storage chamber 102 from the liquid outlet 101. After the air is expelled, the control device 30 can then output a second drive signal, causing the drive device 20 to push the piston 12 with a larger second thrust to expel liquid from the liquid outlet 101 of the liquid storage chamber 102. Since there is no air in the liquid storage chamber 102 when the drive device 20 pushes the piston 12 with the second thrust, the uniform liquid output of the beauty device can be precisely controlled according to the displacement of the piston 12 pushed by the second thrust.

[0044] In some embodiments, the drive device 20 and the piston 12 can be connected in an abutting manner. This allows the drive device 20 to drive the piston 12 (e.g., push the piston 12) towards the outlet 101 of the liquid tank 11 only during startup, and to disengage from the piston 12 during reset, thus preventing the piston 12 from following the drive device 20 to reset and causing a large amount of air to be drawn into the liquid storage chamber 102 from the outlet 101. This ensures less air in the liquid storage chamber 102, allowing for faster and more thorough air removal from the liquid storage chamber 102 during startup. Of course, in other embodiments, the drive device 20 and the piston 12 can also employ other connection methods.

[0045] Reference Figure 2 In some embodiments, the control device 30 includes a microprocessor 31 and a drive circuit 32. The microprocessor 31 is electrically connected to the drive circuit 32, and the drive circuit 32 is electrically connected to the drive device 20. The microprocessor 31 controls the drive circuit 32 to output a first drive signal or a second drive signal to the drive device 20. The drive circuit 32 can output different magnitude drive signals (i.e., different magnitude drive voltages or drive currents) according to different control signals output by the microprocessor 31. For example, when the microprocessor 31 outputs a first control signal to the drive circuit 32, the drive circuit 32 outputs a first drive voltage or a first drive current to the drive device 20 according to the received first control signal. When the microprocessor 31 outputs a second control signal, the drive circuit 32 outputs a second drive voltage or a second drive current to the drive device 20 according to the received second control signal, wherein the first drive voltage is less than the second drive voltage, and the first drive current is less than the second drive current. When the beauty device is turned on, the microprocessor 31 can first output a first control signal to the drive circuit 32, so that the drive circuit 32 outputs a first drive voltage or a first drive current to the drive device 20, so that the drive device 20 pushes the piston 12 with a first thrust to expel the air in the liquid storage chamber 102 from the liquid outlet 101. After the air is expelled, the microprocessor 31 outputs a second drive signal to the drive circuit 32, so that the drive device 20 pushes the piston 12 with a second thrust to make the liquid storage chamber 102 dispense liquid evenly.

[0046] Reference Figure 1 , Figures 3 to 5In some embodiments, the liquid reservoir 11 is provided with a sponge element 40 installed inside the liquid outlet 101, and / or, the liquid reservoir 11 is provided with a sponge sheet 50 that blocks the liquid outlet 101. By blocking the liquid outlet 101 with the sponge element 40 and / or the sponge sheet 50, the liquid outlet resistance of the liquid outlet 101 is increased, making it less likely for the liquid in the liquid storage chamber 102 to automatically leak out from the liquid outlet 101. At the same time, the porous structure of the sponge element 40 and / or the sponge sheet 50 allows the air in the liquid storage chamber 102 to be discharged smoothly, and makes the liquid outlet 101 more uniform. In addition, after the sponge element 40 or the sponge sheet 50 is wetted by the liquid in the liquid storage chamber 102, it can play a certain liquid seal role, effectively preventing external air from entering the liquid storage chamber 102.

[0047] In some embodiments, refer to Figure 3 The outlet 101 may be located on the end wall of the first end 111 of the liquid tank 11, wherein the first end 111 is the end of the liquid tank 11 opposite to the piston 12; see reference. Figure 4 The outlet 101 can also be located on the side wall of the first end 111 of the liquid tank 11, and the outlet 101 is close to the inner end face of the first end 111 of the liquid tank 11; see reference. Figure 5 The outlet 101 can also be located at the junction of the side wall and end wall of the first end 111 of the liquid reservoir 11. That is, the outlet 101 is located at or near the end of the liquid storage chamber 102 away from the piston 12, so that even when the remaining liquid in the liquid storage chamber 102 is very small (i.e., low liquid volume) and the beauty device is activated, it can still be ensured that the piston 12 completely expels the air from the liquid storage chamber 102 through the outlet 101. Of course, in some other embodiments, if the problem of venting when the liquid volume of the liquid storage chamber 102 is not considered, the outlet 101 can also be located away from the end wall of the first end 111.

[0048] Reference Figure 1 In some embodiments, the drive device 20 includes a motor 21, a lead screw 22, and a nut pusher 23. The nut pusher 23 can push the piston 12 to slide towards the outlet 101 within the liquid tank 11. The lead screw 22 is threadedly connected to the nut pusher 23. The motor 21 is connected to the lead screw 22, and the motor 21 drives the lead screw 22 to rotate, causing the nut pusher 23 to slide relative to the housing (i.e., the nut pusher 23 and the housing are in sliding engagement along the axial direction of the lead screw 22). Thus, the nut pusher 23 drives the piston 12 to slide within the liquid tank 11. In this embodiment, the drive device 20 uses the lead screw 22 and the nut pusher 23 to convert the rotation of the motor 21 into the sliding of the nut pusher 23, thereby enabling the drive device 20 to push the piston 12 to slide towards the outlet 101 within the liquid tank 11. Of course, in other embodiments, the drive device 20 can also adopt other structural solutions to achieve the pushing of the piston 12.

[0049] Reference Figure 1In some embodiments, the second end 112 of the liquid reservoir 11 (i.e., the end opposite to the first end 111 of the liquid reservoir 11) is open. The motor 21, lead screw 22, nut push rod 23, and piston 12 are sequentially distributed along the sliding direction of piston 12. Nut push rod 23 abuts against the side of piston 12 facing away from the liquid storage chamber 102. In this embodiment, when the beauty device is turned on, the motor 21 drives the lead screw 22 to rotate, causing the lead screw 22 to generate a thrust on the nut push rod 23 towards piston 12. This causes the nut push rod 23 to move towards piston 12 and abut against the side of piston 12 facing away from the liquid storage chamber 102. Then, the nut push rod 23 applies the thrust generated by the lead screw 22 to piston 12, pushing piston 12 to slide into the liquid storage chamber 102. When the beauty device is turned off, the motor 21 resets, the lead screw 22 reverses, and the nut push rod 23 moves away from piston 12 to disengage from piston 12.

[0050] In some embodiments, the motor 21 may be a stepper motor 21, so as to more accurately control the rotation of the lead screw 22, that is, to accurately control the movement of the piston 12, thereby achieving more uniform liquid discharge from the outlet 101 of the liquid storage chamber 102.

[0051] Reference Figure 6 In some embodiments, the beauty device further includes a posture detection device 60, which is electrically connected to the control device 30 and is used to provide feedback on the posture of the beauty device to the control device 30. The posture detection device 60 may be a gyroscope sensor, capable of monitoring the tilt angle of the beauty device in real time. By adding the posture detection device 60 to detect the posture of the beauty device, the control device 30 can determine whether the first end 111 of the liquid tank 11 or the liquid outlet 101 is facing upwards, and thus determine whether to control the drive device 20 to perform air purging. For example, if the control device 30 determines whether the first end 111 of the liquid tank 11 or the liquid outlet 101 is facing upwards based on the posture of the beauty device, then the control device 30 controls the drive device 20 to perform air purging, that is, the control device 30 outputs a first drive signal to cause the drive device 20 to generate a first thrust acting on the piston 12; if the control device 30 determines that the first end 111 of the liquid tank 11 or the liquid outlet 101 is not facing upwards based on the posture of the beauty device (e.g., the first end 111 of the liquid tank 11 or the liquid outlet 101 is facing downwards, i.e., the liquid tank 11 is inverted), then the control device 20 does not perform air purging, because in this case, the air in the liquid storage chamber 102 is located away from the liquid outlet 101. Performing air purging (even if the drive device 20 pushes the piston 12 with the first thrust) will not effectively remove the air from the liquid storage chamber 102, and will cause liquid to leak from the liquid outlet 101. This embodiment avoids performing air purging when the liquid tank 11 is inverted, thus preventing liquid leakage.

[0052] Reference Figure 6In some embodiments, the beauty device further includes a prompting device 70, which is electrically connected to the control device 30 and is used to output corresponding prompting information based on signals from the control device 30. The prompting device 70 can be a voice broadcasting device, an image display device, a prompting light, or a vibration device, etc. For example, when the beauty device is misaligned, it can send a corresponding prompting message to the prompting device 70, causing the prompting device 70 to output the prompting message (e.g., broadcasting a voice message such as "Please adjust the posture of the beauty device" or "The posture of the beauty device is incorrect," or displaying a corresponding indicator, etc.). Of course, the prompting device 70 can also provide other prompts, such as a low battery warning.

[0053] In some embodiments, the housing has a mounting cavity (not shown in the figure), one end of which has an opening. The liquid tank 11 is disposed in the mounting cavity, and the liquid outlet 101 is located outside the mounting cavity. In this embodiment, the liquid tank 11 is installed inside the mounting cavity of the housing to prevent the liquid tank 11 from being exposed, protect the liquid tank 11, and make the installation of the liquid tank 11 more secure and reliable. Of course, in other embodiments, the liquid tank 11 may also be disposed on the outside of the housing.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the content of this application's specification and drawings under the concept of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A beauty device, characterized in that, include: case; A container is disposed on the shell, the container includes a liquid tank and a piston, the liquid tank is provided with a liquid outlet, the piston is slidably disposed on the liquid tank, and a liquid storage cavity is formed between the piston and the liquid tank; A driving device is provided in the housing, the driving device is connected to the piston, and is used to drive the piston to slide toward the liquid outlet of the liquid tank; A control device electrically connected to the drive device is configured to output a first drive signal or a second drive signal to the drive device, thereby controlling the drive device to apply a first thrust or a second thrust to the piston. The first thrust is sufficient to move the piston to expel air from the reservoir, but insufficient to move the piston to discharge liquid from the reservoir. The second thrust is sufficient to move the piston to discharge liquid from the reservoir.

2. The beauty device according to claim 1, characterized in that, The control device includes a microprocessor and a drive circuit. The microprocessor is electrically connected to the drive circuit, and the drive circuit is electrically connected to the drive device. The microprocessor is used to control the drive circuit to output the first drive signal or the second drive signal to the drive device.

3. The beauty device according to claim 1, characterized in that, When the beauty device is turned on, the control device first outputs a first drive signal of a preset duration to the drive device, and then switches to outputting the second drive signal.

4. The beauty device according to claim 1, characterized in that, The liquid tank is equipped with a sponge component installed inside the liquid outlet; And / or, The liquid tank is equipped with a sponge sheet to seal the liquid outlet.

5. The beauty device according to claim 1, characterized in that, The liquid outlet is located on the end wall of the first end of the liquid tank.

6. The beauty device according to claim 1, characterized in that, The liquid outlet is located on the side wall of the first end of the liquid tank, and the liquid outlet is close to the inner end face of the first end of the liquid tank. Alternatively, the liquid outlet may be located at the junction of the side wall and the end wall at the first end of the liquid tank.

7. The beauty device according to any one of claims 1 to 6, characterized in that, The driving device includes a motor, a lead screw, and a nut push rod. The nut push rod can push the piston to slide towards the liquid outlet in the liquid tank. The lead screw is threadedly connected to the nut push rod. The motor is connected to the lead screw and drives the lead screw to rotate, causing the nut push rod to slide relative to the housing, thereby driving the piston to slide.

8. The beauty device according to claim 7, characterized in that, The second end of the liquid tank is open, and the motor, the lead screw, the nut push rod and the piston are distributed in sequence along the sliding direction of the piston. The nut push rod abuts against the side of the piston facing away from the liquid storage chamber. And / or, The motor is a stepper motor.

9. The beauty device according to any one of claims 1 to 6, characterized in that, The beauty device also includes a posture detection device, which is electrically connected to the control device and is used to provide feedback on the posture of the beauty device to the control device. And / or, The beauty device also includes a prompting device, which is electrically connected to the control device and is used to output corresponding prompting information according to the signal from the control device.

10. The beauty device according to any one of claims 1 to 5, characterized in that, The housing has an installation cavity with an opening at one end. The liquid tank is located in the installation cavity, and the liquid outlet is located outside the installation cavity.

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