A three-in-one beauty device

Abstract

The present invention discloses a three-in-one beauty instrument. The three-in-one beauty instrument includes an electric pulse beauty head extending outwards and a beauty instrument body. The electric pulse beauty head includes a first roller head, a second roller head, a first roller rod, a second roller rod, a third roller rod and a separator. The first roller rod, the second roller rod and the third roller rod are through and connected end to end to form a main roller rod, and the tail end of the third roller rod is connected to the beauty instrument body. In the beauty head of the three-in-one beauty instrument of the present invention, there are two roller heads respectively connected to different electrodes. Through the current circulation of the human body, the beauty instrument can achieve the effect of being able to be used by oneself and also by others. When in use, the two roller heads directly contact the skin to form a cycle. In fine places, directly touching the roller rod with fingers can also form a complete current cycle, enabling the beauty instrument to function even when only one roller head can contact the skin.

Description

Technical Field

[0001] The present invention relates to the field of household beauty instruments, and particularly to a three-in-one beauty instrument. Background Art

[0002] With the improvement of people's living standards, more and more people realize the importance of personal skin care for improving personal appearance, and various beauty instruments have been developed. EP electroporation, EMS microcurrent, and MP needleless mesotherapy technologies are all commonly used beauty care technologies in existing beauty instruments. The EMS microcurrent technology can stimulate the activity of facial muscles and produce a lifting effect on facial muscles; the EP electroporation technology can promote the absorption of skin care products and improve the skin care effect; the MP needleless mesotherapy technology can enhance the permeability of skin tissues, enabling hydrophilic molecular components in skin care products that could not be absorbed by cells originally to penetrate into the interior of cells. Some existing beauty instruments combine the three technologies to form a three-in-one beauty instrument, which is a popular household beauty instrument. However, due to the large volume of the three-in-one beauty instrument, it is not convenient to carry and store, and it can generally only be used at home, and the cost is high. At the same time, beauty instruments generally adopt a bipolar mode, and the beauty heads are also very large, and for some fine parts where the two poles cannot be in contact simultaneously, such as the grooves on the face, the desired effect cannot be achieved. Summary of the Invention

[0003] In view of the fact that the three-in-one beauty instrument in the above-mentioned prior art with a bipolar mode cannot achieve the desired effect in some fine parts where the two poles cannot be in contact simultaneously, the present invention provides a three-in-one beauty instrument that can be used in a monopolar mode. The beauty head of the three-in-one beauty instrument is provided with two roller heads at the front and rear respectively connected to different electrodes. The roller head arranged at the rear is directly electrically connected to the electrode through a metal roller rod; during use, not only can the two roller heads be directly in contact with the skin to directly form a complete current loop, but also in some fine parts of the face where the two roller heads cannot be in contact simultaneously, the front roller head can be used to contact the skin of the fine part, and then the rear roller rod contacted by hand can also form a complete current loop, enabling the beauty instrument to also play a role in fine parts where only one roller head can be in contact, better taking care of the fine parts on the human face, and the roller-shaped beauty head has a smaller volume and is more convenient to carry.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: A three-in-one beauty instrument, the three-in-one beauty instrument includes a beauty head extending outward and a beauty instrument body. The beauty head includes a first roller head, a second roller head, a first roller rod, a second roller rod, a third roller rod, and a separator. The first roller rod, the second roller rod, and the third roller rod are hollow and connected end to end to form a main roller rod. The tail end of the third roller rod is connected to the beauty instrument body. The first roller head, the second roller head, and the separator are rotatably sleeved on the main roller rod. The separator is arranged at a position corresponding to the second roller rod between the first roller head and the second roller head. The first roller head, the second roller head, the first roller rod, and the third roller rod are made of a conductive metal material. The second roller rod and the separator are made of a non-conductive insulating material. A conductive rod is arranged inside the hollow main roller rod. The first roller head is electrically connected to one electrode of a power supply arranged inside the beauty instrument body through the first roller rod and the conductive rod. The second roller head and the third roller rod are electrically connected to the other electrode of the power supply.

[0005] The technical solution adopted by the present invention to solve its technical problems further further includes:

[0006] For a three-in-one beauty instrument as described above, the beauty instrument body includes a housing, a power supply, and a control circuit board. An opening for installing the beauty head is provided at the top of the housing. The third roller rod of the beauty head is installed at the opening. The beauty head is electrically connected to the power supply through the control circuit board. An electrical connection hole electrically connected to one electrode of the power supply is provided on the control circuit board. A conductive spring is inserted into the electrical connection hole. The conductive spring extends in the direction of the beauty head and its end is electrically connected to the third roller rod, so that the third roller rod is electrically connected to one electrode of the power supply through the control circuit board. A connecting piece electrically connected to the other electrode of the power supply is provided on the control circuit board. A connecting needle is provided at the end of the conductive rod. An insulating fixing sleeve for fixing the connecting needle is provided inside the third roller rod. The insulating fixing sleeve fixes the connecting needle at the end of the third roller rod when it is installed in the beauty instrument body. One end of the connecting piece is fixed to a position on the control circuit board opposite to the connecting needle. The other end of the connecting piece is bent to an angle perpendicular to the connecting needle, so that when the third roller rod is installed in the opening of the housing of the beauty instrument body, the connecting needle abuts against the connecting piece, so that the first roller head is connected to the other electrode of the power supply through the conductive rod and the control circuit board.

[0007] For a three-in-one beauty instrument as described above, an LED display screen and control buttons are provided on the control circuit board. A perspective window and button holes are provided at corresponding positions on the housing. A key cap capable of pressing the control buttons is provided in the button holes.

[0008] A three-in-one beauty device as described above, the housing of the beauty device body is cylindrical, the opening is arranged on one bottom surface of the housing, a metal plug for sealing the housing and fixing the third roller shaft is installed in the opening, and the upper end of the conductive spring abuts against the bottom surface of the metal plug, so that the third roller shaft is electrically connected to the conductive spring.

[0009] A three-in-one beauty device as described above, a movement bracket is arranged inside the housing, the shape of the movement bracket conforms to the longitudinal cross-sectional shape of the housing, the movement bracket fixes the control circuit board and the power supply, the power supply is fixed below the control circuit board, and an elastic support piece for supporting the key cap is also arranged on the movement bracket.

[0010] A three-in-one beauty device as described above, the power supply includes a battery and a power receiving coil electrically connected to the battery and supplying power to the battery, and the power receiving coil is arranged at the bottom of the beauty device body.

[0011] A three-in-one beauty device as described above, the three-in-one beauty device further includes a wireless charging base, the wireless charging base is provided with a charging slot conforming to the shape of the beauty device body, a power transmitting coil is arranged inside the wireless charging base, and the power transmitting coil is arranged at the bottom inside the charging slot opposite to the power receiving coil.

[0012] A three-in-one beauty device as described above, the three-in-one beauty device further includes a protective cover detachably sleeved on the beauty head, the protective cover includes an inner protective shell with a shape conforming to the beauty head and an outer protective shell covering the outside of the inner protective shell, a first magnet is arranged between the inner protective shell and the outer protective shell, the first magnet is arranged on the edge where the protective cover is connected to the beauty device body, and a second magnet for attracting the first magnet is arranged at the corresponding position of the beauty device body.

[0013] The beneficial effects of the present invention are as follows: The beauty head of the three-in-one beauty instrument of the present invention adopts the form of a roller, and the shape of the roller is more convenient for fitting with the human skin. There are two roller heads on the beauty head respectively connected to different electrodes. Among them, the roller head arranged at the rear is directly electrically connected to the electrode through a metal roller shaft rod. Through the current circulation of the human body, the beauty instrument can achieve the effect of being able to be used by oneself and also by others; when in use, the two roller heads directly contact the skin to form a cycle. In fine places, directly touching the metal roller shaft rod with fingers can also form a complete current cycle, enabling the beauty instrument to function even in fine positions where only one roller head can touch; in addition, the rolling method is used to guide and push skin care products into the skin, which can make the skin care products more evenly distributed on the skin and not be squeezed away compared with the traditional pressing method; finally, by controlling the circuit board to control different current circulation modes, the three-in-one beauty instrument can freely switch between three different skin care modes of EP electropermeation, EMS microcurrent, and MP needle-free mesotherapy, adapting to different skin care needs. Moreover, due to the reduction in the volume of the beauty head, the volume of the three-in-one beauty instrument is also reduced, making it more portable and able to adapt to more usage scenarios, facilitating users to perform skin care anytime and anywhere.

[0014] The following will further illustrate the present invention in conjunction with the drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the three-dimensional structure of a preferred embodiment of the three-in-one beauty instrument of the present invention;

[0016] Figure 2 Schematic diagram of the sectional structure along the straight line AA;

[0017] Figure 3 Schematic diagram of the power supply circuit principle of the wireless charging base in a preferred embodiment of the three-in-one beauty instrument of the present invention;

[0018] Figure 4 Schematic diagram of the power receiving circuit principle in the beauty instrument body in a preferred embodiment of the three-in-one beauty instrument of the present invention;

[0019] Figure 5 Schematic diagram of the circuit principle of the beauty head in a preferred embodiment of the three-in-one beauty instrument of the present invention;

[0020] Figure 6 Schematic diagram of the circuit principle of a preferred embodiment of the three-in-one beauty instrument of the present invention;

[0021] In the figure, 1 is the beauty head, 11 is the first roller head, 12 is the second roller head, 13 is the main roller rod, 131 is the first roller rod, 132 is the second roller rod, 133 is the third roller rod, 1331 is the insulating fixing sleeve, 14 is the separator, 15 is the conductive rod, 151 is the connecting needle head, 2 is the beauty instrument body, 21 is the outer shell, 211 is the perspective window, 212 is the keyhole, 213 is the keycap, 22 is the power supply, 221 is the battery, 222 is the power receiving coil, 23 is the control circuit board, 232 is the conductive spring, 233 is the connecting piece, 234 is the LED display screen, 235 is the control button, 24 is the metal plug, 25 is the movement support, 251 is the elastic support piece, 26 is the second magnet, 3 is the wireless charging base, 31 is the charging slot, 32 is the power sending coil, 4 is the protective cover, 41 is the inner protective shell, 42 is the outer protective shell, 43 is the first magnet. Detailed implementation manner

[0022] This embodiment is the preferred implementation manner of the present invention. All other embodiments with the same or similar principles and basic structures are within the protection scope of the present invention.

[0023] In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, the terms "set" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meanings of "a plurality" and "several" are two or more, unless otherwise clearly and specifically defined.

[0026] The preferred embodiment of the three-in-one beauty instrument of the present invention is referred to Figure 1-6As shown in the figure, the three-in-one beauty instrument includes a beauty head 1 extending outward and a beauty instrument body 2. The beauty head 1 includes a first roller head 11, a second roller head 12, a first roller rod 131, a second roller rod 132, a third roller rod 133 and a separator 14. The first roller rod 131, the second roller rod 132 and the third roller rod 133 are hollow and are connected end to end to form a main roller rod 13 with a through cavity. The tail end of the third roller rod 133 is connected to the beauty instrument body 2. The first roller head 11, the second roller head 12 and the separator 14 are rotatably sleeved on the main roller rod 13. The separator 14 is arranged at a position corresponding to the second roller rod 132 between the first roller head 11 and the second roller head 12. The first roller head 11, the second roller head 12, the first roller rod 131 and the third roller rod 133 are made of a conductive metal material, and the second roller rod 132 and the separator 14 are made of a non-conductive insulating material. Therefore, the first roller head 11 and the second roller head 12 cannot conduct electricity. In this embodiment, in order to fix the first roller head 11, the second roller head 12 and the separator 14, fixing screws are detachably installed at the ends of the main roller rod 13. A conductive rod 15 is arranged inside the through cavity of the main roller rod 13. The first roller head 11 is electrically connected to one electrode of a power supply 22 arranged inside the beauty instrument body 2 through the first roller rod 131 and the conductive rod 15. The second roller head 12 and the third roller rod 133 are electrically connected to the other electrode of the power supply 22. During normal use, the entire beauty head 1 is in contact with the human skin. Since the human body has the ability to conduct electricity, the first roller head 11 and the second roller head 12 are respectively connected to one electrode of the power supply, and a complete conductive cycle is formed through the skin. The beauty head 1 works normally in the bipolar mode; when applied to the fine skin of the face, only the first roller head 11 can contact the skin, and a complete cycle cannot be formed, so the beauty head 1 cannot work. At this time, the user presses a finger on the third roller rod 133, and the two electrodes of the power supply are connected by the human body, and the beauty head 1 can work normally in the monopolar mode.

[0027] In this embodiment, the beauty instrument body 2 includes a housing 21, a power supply 22, and a control circuit board 23. An opening for installing the beauty head 1 is provided at the top of the housing 21. The third roller shaft rod 133 of the beauty head 1 is installed at the opening. The beauty head 1 is electrically connected to the power supply 22 through the control circuit board 23. In order to prevent the three-in-one beauty instrument from being damaged during disassembly, an electrical connection hole electrically connected to one electrode of the power supply 22 is provided on the control circuit board 23. A conductive spring 232 is inserted into the electrical connection hole. The conductive spring 232 extends towards the direction where the beauty head 1 is located, and the end is electrically connected to the third roller shaft rod 133, so that the third roller shaft rod 133 is electrically connected to one electrode of the power supply 22 through the control circuit board 23. Due to the elastic force of the conductive spring 232, the electrical connection strength between the third roller shaft rod 133 and the conductive spring 232 can achieve the effect of welding. In this embodiment, for the convenience of production and assembly, the housing 21 of the beauty instrument body 2 is cylindrical. The opening is provided on one bottom surface of the housing 21. A metal plug 24 that seals the housing and fixes the third roller shaft rod 133 is installed in the opening. The upper end of the conductive spring 232 abuts against the bottom surface of the metal plug 24, so that the third roller shaft rod 133 is electrically connected to the conductive spring 232.

[0028] Since it is necessary to prevent the two poles of the power supply from being connected and causing the three-in-one beauty instrument to fail, the conductive rod 15 connected to the first roller head 11 directly passes through the hole in the main roller shaft rod 13 and enters the beauty instrument body 2. A connecting piece 233 electrically connected to the other electrode of the power supply 22 is provided on the control circuit board 23. A connecting needle 151 is provided at the end of the conductive rod 15. An insulating fixing sleeve 1331 for fixing the connecting needle 151 is provided inside the third roller shaft rod 133. The insulating fixing sleeve 1331 fixes the connecting needle 151 at the end where the third roller shaft rod 133 is installed in the beauty instrument body 2. One end of the connecting piece 233 is fixed to the position of the control circuit board 23 opposite to the connecting needle 151, and the other end of the connecting piece 233 is bent to an angle perpendicular to the connecting needle 151. When the third roller shaft rod 133 is installed in the opening of the housing 21 of the beauty instrument body 2, the connecting needle 151 abuts against the connecting piece 233, so that the first roller head 11 is connected to the other electrode of the power supply 22 through the conductive rod 15 and the control circuit board 23.

[0029] In this embodiment, for the convenience of controlling the use of the three-in-one beauty instrument, an LED display screen 234 for displaying the working state of the three-in-one beauty instrument and control buttons 235 for controlling the three-in-one beauty instrument to work at different frequencies are provided on the control circuit board 23. For the convenience of observing the working state of the three-in-one beauty instrument and pressing the control buttons 235, a perspective window 211 and a button hole 212 are provided at the corresponding positions of the housing 21. A key cap 213 for pressing the control buttons 235 is provided in the button hole 212.

[0030] In this embodiment, in order to prevent the components inside the three-in-one beauty device from being damaged due to vibration, a movement support 25 is provided inside the housing 21. The shape of the movement support 25 conforms to the longitudinal cross-sectional shape of the housing 21. The movement support 25 fixes the control circuit board 23 and the power supply 22. The power supply 22 is fixed below the control circuit board 23. An elastic support piece 251 for supporting the key cap 213 is also provided on the movement support 25.

[0031] In this embodiment, in order to enable the three-in-one beauty device to be used wirelessly, the power supply 22 includes a battery 221 and a power receiving coil 222 that is electrically connected to the battery 221 and supplies power to the battery 221. The power receiving coil 222 is provided at the bottom of the beauty device body 2.

[0032] In order to facilitate charging of the three-in-one beauty device, in this embodiment, the three-in-one beauty device further includes a wireless charging base 3. The wireless charging base 3 is provided with a charging slot 31 that conforms to the shape of the beauty device body 2. A power transmission coil 32 is provided inside the wireless charging base 3. The power transmission coil 32 is provided at the bottom inside the charging slot 31 opposite to the power receiving coil 222. During charging, as long as the wireless charging base 3 is connected to a wire and the beauty device body 2 is inserted into the charging slot 31, the power transmission coil 32 will automatically sense the power receiving coil 222 and transmit power to the power receiving coil 222 by electromagnetic induction, so as to replenish the power of the battery 221.

[0033] In this embodiment, in order to protect the beauty head 1 and prevent it from being damaged during carrying, the three-in-one beauty device further includes a protective cover 4 that is detachably sleeved on the beauty head 1. The protective cover 4 includes an inner protective shell 41 whose shape conforms to that of the beauty head 1 and an outer protective shell 42 that covers the outer protective shell 41. A first magnet 43 is provided between the inner protective shell 41 and the outer protective shell 42. The first magnet 43 is provided on the edge where the protective cover 4 is in contact with the beauty device body 2. A second magnet 26 that attracts the first magnet 43 is provided at the corresponding position of the beauty device body 2, so that the protective cover 4 can be firmly sleeved on the beauty head 1.

[0034] In order to improve the conductive effect of the first roller head 11 and the second roller head 12, a layer of pure gold conductive layer is plated on the surfaces of the first roller head 11 and the second roller head 12 in this embodiment.

[0035] EMS (Electrical Muscle Stimulation) microcurrent technology is a beauty method that uses electric current to imitate the action potential when the central nervous system controls muscle contraction, causing the muscles to be stimulated, contract, promote blood circulation, increase the production of elastic fibers, and reactivate the muscle activity. It can relax the muscles tightened by daily facial expressions, has a significant effect on preventing facial muscle atrophy and sagging, improving facial muscle aging, and restoring the elasticity of facial skin. When a facial lifting massage is needed, press the keycap 213, so that the keycap 213 presses the control button 235 to adjust the three-in-one beauty device to the EMS microcurrent mode. At this time, the control circuit board 23 starts to control the current to flow to the first roller head 11 and the second roller head 12. Before the first roller head 11 and the second roller head 12 come into contact with the skin, since there is no electrical connection between the first roller head 11 and the second roller head 12, the current cannot be connected, and the control circuit board 23 monitors that the current is not flowing, and the three-in-one beauty device is in the standby state; when the user places the beauty head 1 on the skin surface so that the first roller head 11 and the second roller head 12 are in contact with the skin at the same time, the current can flow, and the control circuit board 23 monitors that the current can pass through, and controls the three-in-one beauty device to enter the operating state, releasing current through the first roller head 11 and the second roller head 12 to imitate the action potential of the central nerve, causing the muscles at the contact part to contract, and lifting the sagging facial muscles; when massaging to a delicate position on the face, due to position limitations, only the first roller head 11 may be able to contact the facial skin. At this time, place the finger on the metal third roller rod 133. Due to the conductive effect of the human body, the first roller head 11 and the third roller rod 133 can form a loop, enabling the three-in-one beauty device to operate normally in the monopolar mode.

[0036] EP (Electroporation) electroporation technology is a beauty method that can promote the absorption of skin care products. Skin care products contain a large number of macromolecules, which usually cannot be absorbed by skin cells through the cell membrane. Therefore, the skin care effect that can be achieved by applying skin care products to the skin surface by hand is only about one percent. However, under the condition of electrification, since the cell membrane cannot pass through the current but acts as a capacitor, ion channels will instead be formed, enabling macromolecular compounds to pass through. EP electroporation technology precisely utilizes this property of the cell membrane. By using the beauty head 1, cells are placed under a specific electric field stimulation to form temporary channels through which macromolecules can pass, promoting the penetration of the effective macromolecular compounds in skin care products into skin cells, and increasing the absorption rate of skin care products by ten times. When skin care product introduction is required, press the keycap 213, so that the keycap 213 presses the control button 235, and the three-in-one beauty instrument is adjusted to the EP electroporation introduction mode, and the corresponding mode will be displayed on the LED display screen 234. The main purpose of the EP electroporation mode is to promote the penetration of cosmetics and introduce the effective ingredients of skin care products into the dermis layer of the skin. In this mode, the control circuit board 23 monitors whether the first roller head 11, the second roller head 12 or the third roller rod 133 of the beauty head 1 has come into contact with the skin through the conduction situation, and forms a cycle through the human body. If a cycle has been formed, it starts to control the precise output of a current with a voltage of 30 - 35V and a frequency of 2200Hz - 40000Hz to the skin of the beauty head 1, so that ion channels are temporarily formed on the cell membrane, and macromolecular compounds can enter the cells; when the beauty head 1 stops contacting the human body and an effective conduction cycle cannot be formed, the control circuit board 23 controls the power supply 22 to stop outputting current to the beauty head 1 and enters the standby mode. When the standby time exceeds the preset time, the control circuit board 23 will also control the three-in-one beauty instrument to automatically shut down to save power.

[0037] MP (Mesoporation) needle-free mesotherapy technology is a beauty technology that combines electroporation technology and electroosmosis technology. First, using electroporation technology, through electric shock, electric shock pores that can remain open for several seconds or even minutes are formed on the lipid bilayer of skin cells, enabling hydrophilic molecules in skin care products that could not be absorbed by cells originally to penetrate the cell lipid bilayer and enter the cell interior. Then, electroosmosis technology is used to promote the absorption of nutrient molecules dispersed in skin care products. A positive current is applied to the nutrient molecules at the positive electrode. Since like charges repel each other, the nutrient molecules can be pushed into the skin tissue, and at the same time, neutral molecules can also be driven to penetrate and enter the skin interior together. When needle-free mesotherapy care is to be performed, the keycap 213 is also pressed to control the three-in-one beauty device to switch to the MP needle-free mesotherapy mode. According to the preset program, the control circuit board 23 will first control the beauty head 1 to apply an electric shock to the skin, causing electric shock pores to be generated on the lipid bilayer of skin cells, and then switch to the mode of releasing positive current to push the nutrient molecules in the skin care products through the electric shock pores into the dermis layer of the skin, completing a whole set of skin care processes in the MP needle-free mesotherapy mode.

[0038] For the circuit principle of the three-in-one beauty device in this embodiment, refer to the preferred embodiment Figure 3-6 As shown, a current with a rated voltage of 5V is input to the wireless charging base 3. The wireless transmitting chip RH9826 in the wireless charging base 3 sends a signal to the receiving coil 222 in the beauty device body 2 through the power transmission coil 32. The receiving chip RH9825 arranged on the control circuit board 23 receives the signal and starts to deliver the current to the battery 221 for charging, and at the same time monitors the charging voltage to avoid overvoltage charging. A total control chip RHX-MCU is arranged on the control circuit board 23. The battery 221 is connected to the total control chip RHX-MCU. The total control chip RHX-MCU controls the on / off of the beauty device body, mode conversion, display and backlight of the LED display screen 234, the drive circuit, as well as the charging detection and low-power detection of the battery 221. A drive chip MAX232 is also arranged on the control circuit board 23. The total control chip RHX-MCU is electrically connected to the drive chip MAX232. The beauty head 1 is driven through the drive chip MAX232. The drive chip MAX232 converts the signal given by the total control chip RHX-MCU into a pulsed current and delivers it to the beauty head 1. The output frequency of the total control chip RHX-MCU has three gears, the first gear is 2.2KHz, the second gear is 5KHz, and the third gear is 40Khz; the output voltage of the drive chip MAX232 is 30 - 35V, and the current is 2 - 4mA.

[0039] The beauty head of the three-in-one beauty device of the present invention adopts the form of a roller, and the shape of the roller is more convenient for fitting with the human skin. There are two roller heads on the beauty head that are respectively connected to different electrodes. The roller head arranged at the rear is directly electrically connected to the electrode through a metal roller shaft. Through the current circulation of the human body, the beauty device can achieve the effect of being able to be used by oneself and also by others. When in use, the two roller heads directly contact the skin to form a cycle. In fine places, directly touching the metal roller shaft with a finger can also form a complete current cycle, enabling the beauty device to function even in fine positions where only one roller head can contact. In addition, the rolling method is used to guide and push skin care products into the skin, which can make the skin care products more evenly distributed on the skin without being squeezed away compared with the traditional pressing method. Finally, by controlling the circuit board to control different current circulation modes, the three-in-one beauty device can freely switch between three different skin care modes: EP electropermeation, EMS microcurrent, and MP needleless mesotherapy, to meet different skin care needs. Moreover, due to the reduction in the volume of the beauty head, the volume of the three-in-one beauty device is also reduced, making it more portable and able to adapt to more usage scenarios, facilitating users to perform skin care anytime and anywhere.

Claims

1. A three-in-one beauty device, characterized in that, the three-in-one beauty device includes an outwardly extending electro-pulse beauty head (1) and a beauty device body (2). The electro-pulse beauty head (1) includes a first roller head (11), a second roller head (12), a first roller rod (131), a second roller rod (132), a third roller rod (133) and a separator (14). The first roller rod (131), the second roller rod (132) and the third roller rod (133) are through and connected end to end to form a main roller rod (13). The tail end of the third roller rod (133) is connected to the beauty device body (2). The first roller head (11), the second roller head (12) and the separator (14) are rotatably sleeved on the main roller rod (13). The separator (14) is arranged at a position corresponding to the second roller rod (132) between the first roller head (11) and the second roller head (12). The first roller head (11), the second roller head (12), the first roller rod (131) and the third roller rod (133) are made of a conductive metal material. The second roller rod (132) and the separator (14) are made of a non-conductive insulating material. A conductive rod (15) is arranged inside the through main roller rod (13). The first roller head (11) is electrically connected to one electrode of a power supply (22) arranged inside the beauty device body (2) through the first roller rod (131) and the conductive rod (15). The second roller head (12) and the third roller rod (133) are electrically connected to the other electrode of the power supply (22); when only the first roller head (11) can contact the skin, the user presses a finger on the third roller rod (133), which can connect the two electrodes of the power supply through the human body and enable the beauty head (1) to work in a monopolar mode; The beauty instrument body (2) includes a housing (21), a power supply (22) and a control circuit board (23). An opening for installing the electro-pulse beauty head (1) is provided at the top of the housing (21). The third roller shaft rod (133) of the electro-pulse beauty head (1) is installed at the opening. The electro-pulse beauty head (1) is electrically connected to the power supply (22) through the control circuit board (23). An electrical connection hole electrically connected to one electrode of the power supply (22) is provided on the control circuit board (23). A conductive spring (232) is inserted into the electrical connection hole. The conductive spring (232) extends towards the direction where the beauty head (1) is located and its end is electrically connected to the third roller shaft rod (133), so that the third roller shaft rod (133) is electrically connected to one electrode of the power supply (22) through the control circuit board (23). A connecting piece (233) electrically connected to the other electrode of the power supply (22) is provided on the control circuit board (23). A connecting needle head (151) is provided at the end of the conductive rod (15). An insulating fixing sleeve (1331) for fixing the connecting needle head (151) is provided inside the third roller shaft rod (133). The insulating fixing sleeve (1331) fixes the connecting needle head (151) at the end where the third roller shaft rod (133) is installed into the beauty instrument body (2). One end of the connecting piece (233) is fixed to the position of the control circuit board (23) opposite to the connecting needle head (151). The other end of the connecting piece (233) is bent to an angle perpendicular to the connecting needle head (151). When the third roller shaft rod (133) is installed into the opening of the housing (21) of the beauty instrument body (2), the connecting needle head (151) abuts against the connecting piece (233), so that the first roller shaft head (11) is connected to the other electrode of the power supply (22) through the conductive rod (15) and the control circuit board (23).

2. The three-in-one beauty instrument according to claim 1, characterized in that, an LED display screen (234) and control keys (235) are provided on the control circuit board (23). A perspective window (211) and a key hole (212) are provided at corresponding positions on the housing (21). A key cap (213) capable of pressing the control key (235) is provided in the key hole (212).

3. The three-in-one beauty instrument according to claim 2, characterized in that, the housing (21) of the beauty instrument body (2) is cylindrical. The opening is provided on one bottom surface of the housing (21). A metal plug (24) for sealing the housing and fixing the third roller shaft rod (133) is installed in the opening. The upper end of the conductive spring (232) abuts against the bottom surface of the metal plug (24), so that the third roller shaft rod (133) is electrically connected to the conductive spring (232).

4. The three-in-one beauty instrument according to claim 3, characterized in that, The housing (21) is internally provided with a movement support (25). The shape of the movement support (25) conforms to the longitudinal cross-sectional shape of the housing (21). The movement support (25) fixes the control circuit board (23) and the power supply (22). The power supply (22) is fixed below the control circuit board (23). The movement support (25) is further provided with an elastic support piece (251) for supporting the keycap (213).

5. The three-in-one beauty instrument according to claim 1, characterized in that, the power supply (22) includes a battery (221) and a power receiving coil (222) electrically connected to the battery (221) and supplying power to the battery (221). The power receiving coil (222) is arranged at the bottom of the beauty instrument body (2).

6. The three-in-one beauty instrument according to claim 5, characterized in that, the three-in-one beauty instrument further includes a wireless charging base (3). The wireless charging base (3) is provided with a charging slot (31) conforming to the shape of the beauty instrument body (2). The wireless charging base (3) is internally provided with a power sending coil (32). The power sending coil (32) is arranged at the bottom inside the charging slot (31) opposite to the power receiving coil (222).

7. The three-in-one beauty instrument according to claim 1, characterized in that, the three-in-one beauty instrument further includes a protective cover (4) detachably sleeved on the electro-pulse beauty head (1). The protective cover (4) includes an inner protective shell (41) with a shape conforming to the electro-pulse beauty head (1) and an outer protective shell (42) covering the outer side of the inner protective shell (41). A first magnet (43) is arranged between the inner protective shell (41) and the outer protective shell (42). The first magnet (43) is arranged on the edge where the protective cover (4) is connected to the beauty instrument body (2). A second magnet (26) attracting the first magnet (43) is arranged at the corresponding position of the beauty instrument body (2).

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