WO2024001382A1

WO2024001382A1 - Handheld cosmetic device

Info

Publication number: WO2024001382A1
Application number: PCT/CN2023/086147
Authority: WO
Inventors: 周文申; 陈军; 叶旋; 林映卿
Original assignee: 上海微创惟美医疗科技(集团)有限公司
Priority date: 2022-06-30
Filing date: 2023-04-04
Publication date: 2024-01-04

Abstract

Provided herein is a handheld cosmetic device, comprising a body (10), and a power module (20), a control module (40), a radio-frequency power amplification module (30) and an electrode module (50) that are separately provided in the body (10). The body (10) comprises a treatment head (101) and a handheld portion (102). The treatment head (101) is connected to the handheld portion (102). The power module (20) is connected to the radio-frequency power amplification module (30). The control module (40) is connected to the radio-frequency power amplification module (30). The radio-frequency power amplification module (30) is configured for converting a direct current signal (a) provided by the power module (20) into a radio-frequency signal. The electrode module (50) comprises a first electrode (501) and a second electrode (502), both of which are connected to the radio-frequency power amplification module (30). The first electrode (501) is located on the treatment head (101). The second electrode (502) is located on the handheld portion (102).

Description

Handheld Beauty Device

Cross-references to related applications

This application claims priority to the Chinese patent application with application number 202210761428.2, submitted on June 30, 2022, and the Chinese patent application with application number 202221670717.3, submitted on June 30, 2022, the full text of which is hereby incorporated. Reference.

Technical field

The present application relates to the technical field of electronic devices, and in particular to a handheld beauty device.

Background technique

The radiofrequency beauty instrument applies a radiofrequency electromagnetic field to the skin, and uses the radiofrequency electromagnetic field to generate a thermal effect of radiofrequency current when passing through the skin tissue, causing reversible denaturation of collagen in the dermal layer, stimulating the formation of new collagen during the skin healing process, thus causing a negative impact on the skin. Tightening and lifting effect. As a non-invasive technology, radiofrequency technology has been widely used to reduce facial wrinkles and sagging.

At present, most handheld radio frequency beauty instruments use bipolar radio frequency technology or multipolar radio frequency technology. The main limitation of bipolar radiofrequency technology or multipolar radiofrequency technology is that the positive and negative electrodes are placed parallel to the skin, and the radiofrequency energy penetrates the skin shallowly and cannot penetrate deep into the skin, so the skin tightening effect is not obvious.

Contents of the invention

Some embodiments of the present application provide a handheld beauty device, including a body and a power module, a control module, a radio frequency power amplification module and an electrode module respectively disposed in the body.

The body includes a treatment head and a hand-held part, and the treatment head is connected with the hand-held part.

The power module is connected to the radio frequency power amplification module and is used to provide a direct current signal to the radio frequency power amplification module.

The control module is connected to the radio frequency power amplification module and used to provide control signals.

The radio frequency power amplification module is used to convert the DC signal provided by the power module into a radio frequency signal according to the control signal provided by the control module.

The electrode module includes a first electrode and a second electrode, and both the first electrode and the second electrode are connected to the radio frequency power amplification module.

The first electrode is located on the treatment head and is configured to contact the target site during use. The surface of the first electrode has a dielectric film, and the dielectric film is configured to contact the first electrode during use. electrodes and the target site There is an equivalent capacitance between them.

The second electrode is located on the hand-held part and is at least reused as a part of the hand-held part. The second electrode is configured to be in contact with the hand during use.

In the above-mentioned handheld beauty device, the first electrode and the second electrode are arranged on different interfaces. The first electrode on the treatment head contacts the target part of the human body (such as facial skin), and the radio frequency energy is applied to the target part, and the second electrode is applied to the target part. The electrodes are arranged in the hand-held area of the body to contact other parts of the human body (such as the skin of the hand). Compared with the bipolar radio frequency or multipolar radio frequency used in most handheld radio frequency beauty devices, the handheld beauty device of the present application can greatly increase the loop length between the first electrode and the second electrode, and at the same time make the radio frequency signal The energy can be radiated from the skin epidermis to the subcutaneous part of the target part of the human body. In this way, the radiofrequency energy has a deeper penetration depth and can penetrate deep into the skin, thus improving the skin tightening effect of the device. Since the surface of the first electrode has a dielectric film, during the use of the device, the radio frequency energy of the radio frequency signal can be coupled to the target site through the equivalent capacitance generated by the dielectric film between the first electrode and the target site. This can not only reduce the number of Stinging sensation caused by direct action on the skin. Moreover, compared with non-capacitive electrodes, the first electrode with a dielectric film on the surface also enables the radio frequency energy to be more evenly distributed on the surface of the first electrode, thereby acting on the target site more uniformly. At the same time, at least part of the handheld part of the handheld beauty device can be used as a second electrode. In this way, when the user holds the handheld part and uses the device, the hand can naturally contact the second electrode, thereby forming a complete circuit, so that the radio frequency The signal can be transmitted to the target part normally, which greatly improves the user's convenience and the portability of the device.

In one embodiment, the handheld beauty device further includes an impedance matching module.

The impedance matching module is connected to the radio frequency power amplification module and is used to match the impedance of the target part with the circuit impedance.

In one embodiment, the impedance matching module includes a π-type impedance matching circuit.

In one embodiment, the frequency of the radio frequency signal is greater than or equal to 300kHZ.

In one embodiment, the frequency of the radio frequency signal is greater than or equal to 3 MHz.

In one embodiment, the frequency of the radio frequency signal is 6.78MHz.

In one embodiment, the radio frequency power amplification module includes a class E power amplifier.

In one embodiment, the equivalent area of the second electrode is greater than or equal to 1 cm ² .

The effective area of the second electrode of the above-mentioned handheld beauty device in contact with the skin of other parts of the human body for conduction is greater than or equal to 1cm ² . This can not only prevent the second electrode from overheating and causing discomfort to the user during use of the device, but also ensure Good contact is formed between the hand and the second electrode to avoid the problem that the device stops working due to contact disconnection due to the second electrode being too small.

In one embodiment, the equivalent area of the second electrode is greater than or equal to 8 cm ² .

In one embodiment, the entire hand-held part serves as the second electrode, and the material of the hand-held part includes conductive material. quality.

In one embodiment, the dielectric film includes a first dielectric film layer and a second dielectric film layer; the first dielectric film layer is located on the surface of the first electrode, and the second dielectric film layer is located on the surface of the first electrode. The surface of the first dielectric film layer; the thickness of the first dielectric film layer is smaller than the thickness of the second dielectric film layer.

The above-mentioned handheld beauty device has a first dielectric film layer on the surface of the first electrode. The first dielectric film layer can be used to generate a coupling capacitance between the first electrode and the target site so that the first electrode is not in direct contact. When reaching the surface of the human body, the radiofrequency energy is coupled into the skin through the coupling capacitance between the first electrode and the human skin, which can effectively prevent stinging and discomfort caused by excessive local current in the electrode. The surface of the first dielectric film layer of the above-mentioned handheld beauty device is also provided with a second dielectric film layer. The addition of the second dielectric film layer can further increase the equivalent capacitive coupling effect compared to a single dielectric film layer and further increase the radio frequency energy. The uniformity of distribution further improves the user experience of the device, and when the thickness of the second dielectric film layer is greater than that of the first dielectric film layer, the improvement effect is more significant. At the same time, the second dielectric film layer can also protect the first dielectric film layer and the first electrode, improving the stability of the above-mentioned handheld beauty device during daily use and the comfort of the user's face during sliding treatment.

In one embodiment, the thickness of the first dielectric film layer is 0.01-0.1 mm, and the thickness of the second dielectric film layer is 0.05-1 mm.

In one embodiment, the material of the dielectric film includes polyimide, polycarbonate, polypropylene, polyamide, polymethyl methacrylate, or polyethylene terephthalate.

In one embodiment, the first dielectric film layer includes a polyimide film, and the second dielectric film layer includes a polycarbonate film.

Polycarbonate film has high Rockwell hardness, high heat distortion temperature, high tensile strength, high resistivity, poor water absorption, high thermal conductivity, thin thickness, and has excellent acid resistance, alcohol resistance and grease resistance, and water absorption rate Therefore, using polycarbonate film as the second dielectric film layer can not only further increase the effect of equivalent capacitive coupling, but also further improve the stability of the handheld beauty device in daily use.

In one embodiment, the electrode module further includes a temperature monitoring unit and a touch detection unit respectively connected to the control module. The temperature monitoring unit is integrated in the first electrode and used to monitor the temperature of the target site;

The touch detection unit is connected to the second electrode and is used to detect whether the second electrode is in contact with the hand in response to the control instruction of the control module. The above-mentioned handheld beauty equipment can monitor the surface temperature of the target part in real time during use to prevent burns caused by overheating. At the same time, it can also be detected whether the second electrode is always in contact with the hand.

In one embodiment, the first electrode is detachably disposed on the treatment head.

The dielectric film and the first electrode are integrally formed.

In one embodiment, the control module includes: a switch unit and a micro control unit.

A switch unit is used to generate at least one of a switch signal and a gear signal in response to human body movements.

A microcontrol unit, connected to the switch unit, the radio frequency power amplification module and the electrode module, for controlling the radio frequency power amplification module according to at least one of the switch signal and/or the gear signal. .

In one embodiment, the power module includes a power adapter.

The power adapter is used to convert AC signals into the DC signals that are delivered to the radio frequency power amplification module.

In one embodiment, the radio frequency power amplification module includes a radio frequency transistor and a tuning circuit.

The radio frequency transistor is connected to the power module and the control module, and the control module controls the radio frequency transistor to convert the DC signal to generate the radio frequency signal according to the control signal.

The tuning circuit is provided in a connection path between the radio frequency transistor and the first electrode and the second electrode, and is used for tuning the radio frequency signal.

Description of drawings

In order to more clearly explain the technical solutions in the embodiments of the present application or the traditional technology, the drawings needed to be used in the description of the embodiments or the traditional technology will be briefly introduced below. Obviously, the drawings in the following description are only for the purpose of explaining the embodiments or the technical solutions of the traditional technology. For some embodiments of the application, those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 illustrates a structural block diagram of a handheld beauty device provided by one embodiment of the present application;

Figure 2 illustrates a side view of a handheld beauty device provided by one embodiment of the present application;

Figure 3a shows a front view of the electric field distribution on the surface of a metal electrode without a dielectric film;

Figure 3b shows a top view of the electric field distribution on the surface of a metal electrode without a dielectric film;

Figure 3c shows a front view of the electric field distribution on the surface of the first electrode with a dielectric film on the surface in one embodiment of the present application;

Figure 3d shows a top view of the electric field distribution on the surface of the first electrode with a dielectric film on the surface in one embodiment of the present application;

Figure 4 is a schematic structural diagram of a handheld beauty device provided by another embodiment of the present application.

Explanation of reference symbols:
10. Body; 101. Treatment head; 102. Handheld part; 20. Power module; 201. Power adapter; 30. RF power amplification module; 301. RF transistor; 302. Tuning circuit; 40. Control module; 401. Switch unit ; 402. Micro control unit; 50. Electrode module; 501. First electrode; 502. Second electrode; 503. Temperature monitoring unit; 504. Touch detection unit; a. DC signal; b. Control signal; 60. Impedance matching module.

Detailed ways

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the application are given in the accompanying drawings. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing specific embodiments only and is not intended to limit the application.

It can be understood that "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have the transmission of electrical signals or data between each other.

It will be understood that, although the terms "first" and "second" may be used to describe various elements, components and/or sections, these elements, components and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component and/or section from another element, component and/or section. Thus, a first element, component and/or section discussed below could be termed a second element, component and/or section without departing from the teachings of the present invention; for example, a first electrode could be termed a second electrode , and similarly, the second electrode can be called the first electrode; the first electrode and the second electrode are different electrodes, for example, the first electrode can be a positive electrode and the second electrode can be a negative electrode, or the first electrode The second electrode may be a negative electrode and the second electrode may be a positive electrode.

As used herein, the singular forms "a," "an," and "the" may include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the terms "comprising" or "having" etc. specify the presence of stated features, integers, components, parts or combinations thereof, but do not exclude the presence or addition of one or more other features, integers , components, parts or their combinations. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.

The radiofrequency beauty instrument applies a radiofrequency electromagnetic field with a frequency of 300kHz to 300MHz to the skin, and uses the radiofrequency electromagnetic field to generate a thermal effect of radiofrequency current when passing through the skin tissue, causing reversible denaturation of collagen in the dermis and stimulating new collagen during the skin healing process. Formation, thus producing a tightening and lifting effect on the skin. As a non-invasive technology, radiofrequency technology has been widely used to reduce facial wrinkles and sagging.

At present, most handheld radio frequency beauty instruments use bipolar radio frequency technology or multipolar radio frequency technology, that is, the radio frequency electrodes at the front end of the beauty instrument are two (two groups) or more (multiple groups), divided into positive and negative electrodes. The positive and negative electrodes are placed parallel to the skin, and the positive and negative electrodes of the two poles convert each other at extremely high frequencies, forming a high-frequency oscillating electromagnetic field that acts on the skin. The main limitation of bipolar radiofrequency technology or multipolar radiofrequency technology is that the depth of radiofrequency energy penetrating the skin is shallow and cannot penetrate deep into the skin, so the skin tightening effect is not obvious.

In view of the above-mentioned shortcomings of the prior art, this application provides a handheld beauty device according to some embodiments.

Figure 1 illustrates a structural block diagram of a handheld beauty device provided by one embodiment of the present application. Figure 2 illustrates a side view of a handheld beauty device provided by one embodiment of the present application. As shown in Figures 1 and 2, The handheld beauty device may include a body 10, and a power module 20, a radio frequency power amplification module 30, a control module 40 and an electrode module 50 respectively disposed in the body 10.

The body 10 may include a treatment head 101 and a handheld portion 102 . The treatment head 101 is connected to the handheld portion 102 .

The power module 20 is connected to the radio frequency power amplification module 30 and can be used to provide the direct current signal a for the radio frequency power amplification module 30 . The control module 40 is connected to the radio frequency power amplification module 30 and can be used to provide the control signal b. The radio frequency power amplification module 30 can be used to convert the DC signal a provided by the power module 20 into a radio frequency signal according to the control signal b provided by the control module 40 .

The electrode module 50 may include a first electrode 501 and a second electrode 502 , and both the first electrode 501 and the second electrode 502 are connected to the radio frequency power amplification module 30 . As shown in Figure 2, the first electrode 501 and the second electrode 502 are provided at different interfaces.

The first electrode 501 may be disposed on the treatment head 101 so as to be in contact with the target site during use so as to apply radio frequency signals to the target site. The surface of the first electrode 501 has a dielectric film, and the dielectric film is configured to generate an equivalent capacitance between the first electrode 501 and the target site during use. In some embodiments, the first electrode 501 is detachably provided on the treatment head 101, and the dielectric film and the first electrode 501 are integrally formed.

The second electrode 502 can be disposed on the handheld portion 102 and reused as at least a part of the handheld portion 102 . The second electrode 502 is configured to be in contact with the hand. The first electrode 501 and the second electrode 502 form a loop, so that the radio frequency signal can be transmitted to the target site.

In the above-mentioned handheld beauty device, the first electrode 501 and the second electrode 502 are arranged on different interfaces. By contacting the first electrode 501 on the treatment head 101 with the target site (eg, facial skin), radiofrequency energy is applied to the target site. The second electrode 502 is disposed on the hand-held portion 102 of the body 10 so as to be in contact with the skin of other parts of the human body (for example, the skin of the hand). Compared with the bipolar radio frequency or multipolar radio frequency used in most handheld radio frequency beauty devices in the related art, the handheld beauty device of the present application can greatly increase the loop length between the first electrode 501 and the second electrode 502. At the same time, the radio frequency energy of the radio frequency signal can be radiated from the epidermis of the target part of the human body to the subcutaneous layer, reaching the dermis and part of the subcutaneous layer, three-dimensionally heating the deep tissue of the skin, and activating the collagen and/or fibers of the skin. In this way, the radiofrequency energy has a deeper penetration depth and can penetrate deep into the skin, thus improving the skin tightening effect of the device.

Moreover, since the surface of the first electrode 501 has a dielectric film, during the use of the device, the radio frequency energy of the radio frequency signal can be coupled to the target site through the equivalent capacitance generated by the dielectric film between the first electrode 501 and the target site. This not only reduces the stinging sensation caused by the electrodes acting directly on the skin. Moreover, compared with non-capacitive electrodes, the first electrode 501 with a dielectric film on the surface also enables the radio frequency energy to be more evenly distributed on the surface of the first electrode 501, thereby acting on the target site more uniformly.

It can be understood that this application does not specifically limit the frequency of the radio frequency signal or the output power of the radio frequency signal. As an example, the frequency of the radio frequency signal may be greater than or equal to 300 kHz. For example, the frequency of the radio frequency signal may be 300 kHz, 500 kHz or 1 MHz, etc. In some embodiments, the frequency of the radio frequency signal may be greater than or equal to 3 MHz. For example, the frequency of the radio frequency signal may be 3 MHz, 5 MHz, 6 MHz, 10 MHz, 50 MHz, 100 MHz or 300 MHz, etc.

In one embodiment, the frequency of the radio frequency signal is 6.78MHz.

As an example, the output power of the radio frequency signal may be 2W to 30W; for example, the output power of the radio frequency signal may be 2W, 5W, 10W, 15W or 30W, etc.

In some embodiments, the handheld part 102 of the above-mentioned handheld beauty device is at least partially the second electrode 502, so that when the user holds the handheld part 102 and uses the device, the hand can naturally contact the second electrode 502, thereby forming A complete loop allows the radio frequency signal to be transmitted to the target site normally, greatly improving the user's convenience and the portability of the device.

Figures 3a to 3d show the electric field distribution on the surface of a metal electrode without a dielectric film on the surface (also called a non-capacitive electrode) and a first electrode with a dielectric film on the surface (also called a capacitive electrode). Among them, Figure 3a shows a front view of the electric field distribution on the surface of a metal electrode without a dielectric film on the surface. Figure 3b shows a top view of the electric field distribution on the surface of a metal electrode without a dielectric film on the surface. Figure 3c shows a top view of the surface electric field distribution of a metal electrode with no dielectric film on the surface. A front view of the electric field distribution on the surface of the first electrode. Figure 3d shows a top view of the electric field distribution on the surface of the first electrode with a dielectric film on the surface. The arrow lines in the figure indicate the electric field line distribution. It can be seen that compared with the solution of using non-capacitive electrodes, using the first electrode with a dielectric film on the surface can make the electric field not limited to the edges and corners of the electrode, making the electric field distribution more uniform, and can also effectively prevent local currents caused by the electrode. Stinging and discomfort caused by excessive size.

This application does not specifically limit the type of the radio frequency power amplification module 30 . As an example, a Class E power amplifier can be used as the radio frequency power amplification module 30 but is not limited to it.

Compared with the traditional push-pull circuit design in the RF power amplification module 30, the above-mentioned handheld beauty device can have higher RF signal output efficiency by using a Class E power amplifier as the RF power amplification module 30. At the same time, Class E power amplifiers are easier to expand and have less design complexity.

In this application, the impedance of the loop through which the radio frequency signal is normally transmitted to the target site is called circuit impedance. Referring to FIG. 4 , in one embodiment, the handheld beauty device may further include an impedance matching module 60 . The impedance matching module 60 is connected to the radio frequency power amplification module 30 and can be used to match the impedance of the target site with the circuit impedance, so that the circuit output efficiency is greater than or equal to 50%.

Since the impedance of target parts on different human bodies (for convenience of description, the impedance of the target part in this application is also called human body impedance) has great differences, when the impedance of the human body changes due to factors such as skin conductivity, radio frequency energy cannot It is better coupled to the skin through the coupling capacitance between the first electrode and human skin, affecting the therapeutic effect of the device. Moreover, according to the law of conservation of energy, this part of the radio frequency energy will also be dissipated from the device in the form of heat energy, causing the device to heat up, thereby affecting Affects the stability of equipment operation. The above-mentioned handheld beauty device can match the impedance of different target parts on the human body with the circuit impedance through the impedance matching module 60, so that the radio frequency energy can be effectively coupled into the skin, thereby ensuring the therapeutic effect of the device.

It can be understood that any impedance matcher used in the existing electronic equipment technical field can be used as the impedance matching module 60 , so the specific internal structure of the impedance matching module 60 will not be described again here.

Please continue to refer to FIG. 4 . In one embodiment, the impedance matching module 60 may include a π-type impedance matching circuit. In a π-type impedance matching circuit, impedance matching can be achieved by changing the capacitance ratio of variable capacitors _C1 and _C2 .

In the above handheld beauty device, the impedance matching module 60 adopts a π-type impedance matching circuit design, which has high compatibility and can match the human body impedance that changes within a wide range with the circuit impedance.

This application does not specifically limit the structure, shape and size of the first electrode 501. In one embodiment, the first electrode 501 may include a flexible circuit board.

The flexible circuit board may include a flexible base material layer, and electrodes disposed on the flexible base material layer and connected to the radio frequency power amplification module 30 . As an example, the first electrode 501 may be a metal electrode or other conductive material processed on a flexible substrate layer.

At present, in most handheld radio frequency beauty devices, the metal electrodes will directly contact the skin. During the use of the device, the radio frequency current directly acts on the human body, which can easily cause tingling and discomfort.

A dielectric film layer is attached to the surface of the first electrode 501 of the above-mentioned handheld beauty device. During use, the dielectric film layer generates an equivalent capacitance between the first electrode 501 and the target site, so that the first electrode is not in direct contact with On the surface of the human body, radiofrequency energy is coupled into the skin through the equivalent capacitance between the first electrode and human skin, which can effectively prevent stinging and discomfort caused by excessive local current in the electrode.

This application does not specifically limit the material of the dielectric film. As an example, the material of the dielectric film may include but is not limited to insulating materials. As examples, the material of the dielectric film may include polyimide (PI), polycarbonate (PC), polypropylene (PP), polyamide (PA), polymethylmethacrylate (PMMA) or polyterephthalene. One or more of ethylene glycol formate (PET) and the like.

In one embodiment, the dielectric film may include a first dielectric film layer and a second dielectric film layer. Wherein, the first dielectric film layer is located on the surface of the first electrode, the second dielectric film layer is located on the surface of the first dielectric film layer, and the thickness of the first film layer is smaller than the thickness of the second dielectric film layer.

The above-mentioned handheld beauty device has a first dielectric film layer on the surface of the first electrode. During use, the first dielectric film layer generates a coupling capacitance between the first electrode 501 and the target site, so that the first electrode does not Without direct contact with the human body surface, radio frequency energy is coupled into the skin through the coupling capacitance between the first electrode and human skin, which can effectively prevent stinging and discomfort caused by excessive local current in the electrode.

The surface of the first dielectric film layer of the above-mentioned handheld beauty device is also provided with a second dielectric film layer. Compared with a single dielectric film layer, the arrangement of the second dielectric film layer can further increase the equivalent capacitive coupling effect and further increase the radio frequency energy. The uniformity of distribution further improves the user experience of the device, and when the thickness of the second dielectric film layer is greater than that of the first dielectric film layer, the improvement effect is more significant.

At the same time, the second dielectric film layer can also protect the first dielectric film layer and the first electrode, improving the stability of the above-mentioned handheld beauty device during daily use and the user's facial stability when the handheld beauty device slides on the target area. Comfort.

This application does not specifically limit the thickness and surface area of the first dielectric film layer and the second dielectric film layer. As an example, the thickness of the first dielectric film layer is 0.01-0.1 mm. For example, the thickness of the first dielectric film layer may be 0.01 mm, 0.03 mm, 0.05 mm, 0.07 mm or 0.1 mm, etc. As an example, the thickness of the second dielectric film layer may be 0.05 mm to 1 mm. For example, the thickness of the second dielectric film layer may be 0.05 mm, 0.1 mm, 0.25 mm, 0.5 mm, 0.75 mm or 1 mm.

As an example, the areas of the first dielectric film layer and the second dielectric film layer may be the same as the area of the first electrode 501 .

This application does not specifically limit the materials of the first dielectric film layer and the second dielectric film layer. As an example, the first dielectric film layer may include a polyimide film and the second dielectric film layer may include a polycarbonate film.

This application also does not specifically limit the structure and size of the second electrode 502. As an example, the equivalent area of the second electrode may be greater than or equal to 1 cm ² , for example, the equivalent area of the second electrode may be 2 cm ² , 4 cm ² or 6 cm ² and so on.

The effective area of the second electrode 502 of the above-mentioned handheld beauty device that contacts the skin of other parts of the human body for conduction is greater than or equal to 1 cm ² . This can prevent the second electrode 502 from overheating and causing discomfort to the user during use of the device.

In some embodiments, the equivalent area of the second electrode may be greater than or equal to 8cm ² , for example, the equivalent area of the second electrode may be 8cm ² , 10cm ² , 12cm ² , 14cm ² or 16cm ² and so on.

It should be noted that the second electrode 502 should be arranged to match the shape of the handheld portion 102 , and the equivalent area of the second electrode 502 may refer to the planar area after the second electrode 502 is expanded into a plane.

In one embodiment, the handheld portion 102 may serve as the second electrode 502 as a whole. On this basis, the material of the housing of the handheld portion 102 is a conductive material.

For the power module 20, this application does not specifically limit the method of generating the DC signal a. As an example, the method of generating the DC signal a may include, but is not limited to, using a power adapter to convert the AC signal into a radio frequency power amplifier. The DC signal a of the module 30, or use the battery to directly output the DC signal a.

Please continue to refer to FIG. 1 . In one embodiment, the power module 20 may include a power adapter 201 . The power adapter 201 can be used to convert the AC signal into a DC signal a that is transmitted to the radio frequency power amplification module 30 .

In some embodiments, the power module 20 may include a charging circuit, a boost circuit, and a battery connected between the charging circuit and the boost circuit. The charging circuit is connected to the battery and can be used to charge the battery. The battery can output an initial DC signal to the boost circuit. The boost circuit can boost the initial DC signal through, but is not limited to, a charge pump to generate a DC signal a and output it to the radio frequency power amplification module 30 .

Please continue to refer to FIG. 1 . In one embodiment, the radio frequency power amplification module 30 may include a radio frequency transistor 301 and a tuning circuit 302 .

Among them, the radio frequency transistor 301 is connected to the power module 20 and the control module 40. The control module 40 can control the radio frequency transistor 301 to convert the DC signal a into a radio frequency signal. The tuning circuit 302 is provided in the connection path between the radio frequency transistor 301 and the first electrode 501 and the second electrode 502, and can be used for tuning radio frequency signals.

For the control module 40, this application does not limit which signal parameters the generated parameters specifically include. As examples, the generation parameters may include, but are not limited to, the frequency of the radio frequency signal, the output power of the radio frequency signal, and the waveform of the radio frequency signal.

Please continue to refer to FIG. 1 , in one embodiment, the control module 40 may include a switch unit 401 and a micro control unit 402 .

The switch unit 401 may be used to generate switch signals and/or gear signals in response to human body movements. The micro control unit 402 is connected to the switch unit 401, the radio frequency power amplification module 30 and the electrode module 50 respectively, and can be used to control the radio frequency power amplification module 30 according to the switch signal and/or the gear signal.

In some other possible embodiments, the control module 40 may also include a display unit. The display unit is connected to the micro control unit 402 and is used to display the current status of the switch and/or the current gear. The display unit can also be used to display power supply information. For example, when the power module 20 uses the battery to directly output the DC signal a, the display unit can be used to display battery status information.

The control module 40 may also include an alarm unit. The alarm unit is connected to the micro-control unit 402 and is used to issue an alarm when an abnormality occurs during the power-on/off process or an abnormality occurs during the use of the equipment. As an example, the alarm unit may include but is not limited to a buzzer. The buzzer may sound to alert when an abnormality occurs during the power on/off process or when the device is used.

The control module 40 may also include a communication unit. The communication unit is connected to the micro control unit 402 and is used to realize communication connections between the control module 40 and other modules in the device.

Please continue to refer to FIG. 1 . In one embodiment, the electrode module 50 may further include a temperature monitoring unit 503 and a touch detection unit 504 that are respectively connected to the control module 40 .

The temperature monitoring unit 503 can be integrated in the first electrode 501 and is used to respond to the control instructions of the control module 40 and monitor the temperature of the target site to prevent the skin of the target site from being scalded due to overheating of the first electrode 501 . The touch detection unit 504 is connected to the second electrode 502 and can be used to respond to the control instruction of the control module 40 and detect whether the second electrode 502 is in contact with the hand.

The above-mentioned handheld beauty equipment can monitor the surface temperature of the target part in real time during use to prevent burns caused by overheating. At the same time, it can also be detected whether the second electrode 502 is always in contact with the hand.

Specifically, during use of the device, the temperature of the target site can be monitored through the temperature monitoring unit 503 . When the temperature monitored by the temperature monitoring unit 503 exceeds the preset threshold temperature, the output power of the radio frequency signal can be reduced or the output of the radio frequency signal can be turned off to avoid scalding the skin of the target part of the human body.

This application does not specifically limit the implementation form of the touch detection unit 504. In one embodiment, the touch detection unit 504 may include a touch sensor, which may be disposed at the second electrode 502 for detecting whether the second electrode 502 is in contact with a human hand. As an example, the touch sensor may include but is not limited to a capacitive touch sensor. The capacitive touch sensor may detect whether the second electrode 502 is in contact with a human hand by measuring changes in capacitance between the second electrode 502 and ground. Furthermore, when it is detected that the second electrode 502 is not in contact with the human hand, the output of the radio frequency signal can be turned off to avoid waste caused by continued ineffective operation of the device.

In the description of this specification, reference to the terms "some embodiments," "other embodiments," "ideal embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included herein. In at least one embodiment or example of the application. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

The technical features of the above-described embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

The above-described embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

A handheld beauty device, characterized in that it includes a body and a power module, a control module, a radio frequency power amplification module and an electrode module respectively arranged in the body; wherein

The body includes a treatment head and a hand-held part, and the treatment head is connected to the hand-held part;

The power module is connected to the radio frequency power amplification module and is used to provide a DC signal for the radio frequency power amplification module;

The control module is connected to the radio frequency power amplification module and used to provide control signals;

The radio frequency power amplification module is used to convert the DC signal provided by the power module into a radio frequency signal according to the control signal provided by the control module;

The electrode module includes a first electrode and a second electrode, both of which are connected to the radio frequency power amplification module;

Wherein, the first electrode is located on the treatment head and is configured to contact the target site during use; the surface of the first electrode has a dielectric film, and the dielectric film is configured to contact the target site during use. An equivalent capacitance is generated between the first electrode and the target site;

The second electrode is located on the hand-held part and is at least reused as a part of the hand-held part; the second electrode is configured to be in contact with the hand during use.
The handheld beauty device according to claim 1, wherein the handheld beauty device further includes an impedance matching module;

The impedance matching module is connected to the radio frequency power amplification module and is used to match the impedance of the target part with the circuit impedance.
The handheld beauty device according to claim 2, wherein the impedance matching module includes a π-type impedance matching circuit.
The handheld beauty device according to claim 3, wherein the frequency of the radio frequency signal is greater than or equal to 300kHZ;

Further, the frequency of the radio frequency signal is greater than or equal to 3MHz.
The handheld beauty device according to claim 4, wherein the frequency of the radio frequency signal is 6.78MHz.
The handheld beauty device according to claim 1, wherein the radio frequency power amplification module includes E Class power amplifier.
The handheld beauty device according to claim 1, wherein the equivalent area of the second electrode is greater than or equal to 1 cm 2 .
The handheld beauty device according to claim 1, wherein the equivalent area of the second electrode is greater than or equal to 8 cm 2 .
The handheld beauty device according to claim 1, wherein the entire handheld portion serves as the second electrode, and the material of the handheld portion includes a conductive material.
The handheld beauty device according to claim 1, wherein the dielectric film includes a first dielectric film layer and a second dielectric film layer; the first dielectric film layer is located on the surface of the first electrode, The second dielectric film layer is located on the surface of the first dielectric film layer; the thickness of the first dielectric film layer is smaller than the thickness of the second dielectric film layer.
The handheld beauty device according to claim 10, wherein the thickness of the first dielectric film layer is 0.01-0.1 mm, and the thickness of the second dielectric film layer is 0.05-1 mm.
The handheld beauty device according to claim 1, wherein the dielectric film is made of polyimide, polycarbonate, polypropylene, polyamide, polymethylmethacrylate or polyterephthalate. Glycol ester.
The handheld beauty device according to claim 10 or 12, wherein the first dielectric film layer includes a polyimide film, and the second dielectric film layer includes a polycarbonate film.
The handheld beauty device according to claim 1, wherein the electrode module further includes a temperature monitoring unit and a touch detection unit respectively connected to the control module; wherein

The temperature monitoring unit is integrated in the first electrode and used to monitor the temperature of the target site;

The touch detection unit is connected to the second electrode and is used to detect whether the second electrode is in contact with the hand in response to the control instruction of the control module.
The handheld beauty device according to claim 1, wherein the first electrode is detachably disposed on Said treatment head;

Wherein, the dielectric film and the first electrode are integrally formed.
The handheld beauty device according to claim 1, wherein the control module includes:

a switch unit, configured to generate at least one of a switch signal and a gear signal in response to human body movements;

A microcontrol unit, connected to the switch unit, the radio frequency power amplification module and the electrode module, for controlling the radio frequency power amplification module according to at least one of the switch signal and the gear signal. .
The handheld beauty device according to claim 1, wherein the power module includes a power adapter;

The power adapter is used to convert AC signals into the DC signals that are delivered to the radio frequency power amplification module.
The handheld beauty device according to claim 1, wherein the radio frequency power amplification module includes a radio frequency transistor and a tuning circuit; wherein

The radio frequency transistor is connected to the power module and the control module, and the control module controls the radio frequency transistor to convert the DC signal to generate the radio frequency signal according to the control signal;

The tuning circuit is provided in a connection path between the radio frequency transistor and the first electrode and the second electrode, and is used for tuning the radio frequency signal.