Multi-pole radio frequency device and radio frequency therapeutic instrument

Abstract

The application discloses a multi-pole radio frequency device and a control method and a radio frequency therapeutic instrument thereof. The device comprises a radio frequency power supply, a return electrode, a therapeutic electrode, a controller, a first switch switching circuit and / or a second switch switching circuit. The controller controls the third input end and the fourth input end of the second switch switching circuit to be respectively switched to connect the third output end and the fourth output end. In the monopole mode, the controller controls the first output end and the second output end of the first switch switching circuit to be respectively electrically connected with the therapeutic electrode and the return electrode. In the bipolar mode, the controller controls the first output end and the second output end to be respectively connected with at least one electrode piece. The technical scheme of the application aims to make the radio frequency electrode output uniform radio frequency energy, so that the radio frequency energy can produce better thermal effects in the parallel and vertical directions of the relative action layer.

Description

[0001] This invention is a divisional application of the invention application with application number 202211225134.4, entitled "Multipolar radiofrequency device and control method thereof, radiofrequency therapy device", filed on September 30, 2022. Technical Field

[0002] This invention relates to the field of medical device technology, and in particular to a multipolar radiofrequency device and its control method, and a radiofrequency therapy device. Background Technology

[0003] Radiofrequency (RF) therapy devices use two types of electrodes of different orientations to generate radiofrequency energy into human tissue. This energy stimulates subcutaneous tissue, causing polarized water molecules within the tissue to move at high speeds, generating a thermal effect. This deactivates diseased tissue proteins, which are then sloughed off by the body's rejection process, resulting in the formation of new healthy tissue and achieving the therapeutic goal. However, existing RF therapy devices suffer from limitations. The electrode design of the current treatment handpiece is fixed, limiting the treatment range corresponding to a single electrode mode. Furthermore, the two interfaces of the RF power supply generate different amounts of heat when outputting RF energy. This heat difference affects the uniformity of the RF energy output from both ends of the power supply, leading to a difference in RF energy output between the treatment electrode and the return electrode on the treatment handpiece. This also limits the treatment range, reduces ease of operation, and negatively impacts the therapeutic effect of the RF therapy device. Summary of the Invention

[0004] The main objective of this invention is to provide a multi-polar radio frequency device that enables the radio frequency electrodes to output uniform radio frequency energy, thereby generating a better thermal effect in both the parallel and perpendicular directions of the radio frequency energy relative to the working layer.

[0005] To achieve the above objectives, the present invention proposes a multi-pole radio frequency device, the multi-pole radio frequency device comprising: The radio frequency power supply has a first interface and a second interface with opposite polarities. Return electrode; Therapeutic electrodes, comprising multiple electrode pads; The first switching circuit has a first input terminal and a second input terminal that are electrically connected to the first interface and the second interface, respectively. The first output terminal of the first switching circuit is electrically connected to the treatment electrode. The second output terminal of the first switching circuit is switchably electrically connected to the return electrode or part of the electrode sheet. The first output terminal and the second output terminal are respectively connected to the first input terminal and the second input terminal. And / or, a second switch switching circuit, wherein the third input terminal of the second switch switching circuit is connected to the first interface, the fourth input terminal of the second switch switching circuit is connected to the second interface, and the second switch switching circuit has a third output terminal and a fourth output terminal; The controller, when the multipolar radio frequency device includes the first switching circuit, further has a unipolar mode and a bipolar mode. In the unipolar mode, the controller controls the first output terminal and the second output terminal to be electrically connected to the treatment electrode and the return electrode, respectively. In the bipolar mode, the controller controls the first output terminal and the second output terminal to be connected to at least one of the electrode plates, respectively. When the multi-pole radio frequency device includes the second switching circuit, the controller controls the third input terminal and the fourth input terminal to switch to the third output terminal and the fourth output terminal respectively.

[0006] Optionally, when the multipole radio frequency device includes the second switching circuit, the controller is used to control the second switching circuit to operate so as to control the connection between the third input terminal and the fourth input terminal and the third output terminal and the fourth output terminal to switch at least once.

[0007] Optionally, the controller is used to control the operation of the second switch switching circuit to control the connection between the third input terminal and the fourth input terminal and the third output terminal and the fourth output terminal to switch at a first preset period.

[0008] When the multipolar radio frequency device includes the first switching circuit, the controller is optionally configured to control the first switching circuit to operate so as to control the first output terminal and the second output terminal to switch between the unipolar mode and the bipolar mode at least once.

[0009] Optionally, the controller is used to control the first switching circuit to operate, so as to control the first output terminal and the second output terminal to switch between the unipolar mode and the bipolar mode at a second preset period.

[0010] Optionally, the first switch switching circuit and the second switch switching circuit may be the same switch switching circuit, and the controller realizes the switching between unipolar mode and bipolar mode, as well as the switching with the first interface and the second interface respectively.

[0011] Optionally, the contact area of ​​the return electrode is larger than the contact area of ​​the treatment electrode.

[0012] The present invention also proposes a control method for a multi-pole radio frequency device, applied to the aforementioned multi-pole radio frequency device, wherein the control method for the multi-pole radio frequency device includes: Determine user input signals; If the signal is in unipolar mode, then enter unipolar mode and control the first output terminal and the second output terminal to be electrically connected to the treatment electrode and the return electrode respectively, so that the polarity of the plurality of electrode plates of the treatment electrode is the same; If the signal is in bipolar mode, then enter bipolar mode and control the first output terminal and the second output terminal to connect to at least one of the electrode plates respectively, so that the polarity of at least one of the electrode plates in the treatment electrode is opposite to the polarity of the other electrode plates. If the signal is in combined mode, then the first output terminal and the second output terminal are controlled to switch between the unipolar mode and the bipolar mode at least once.

[0013] Optionally, the control method for the multi-pole radio frequency device further includes: In either the bipolar mode or the unipolar mode, the connection between the third input terminal and the fourth input terminal and the third output terminal and the fourth output terminal is switched at least once.

[0014] Optionally, the control method for the multi-pole radio frequency device further includes: In the bipolar mode or the unipolar mode, the connection between the third input terminal and the fourth input terminal and the third output terminal and the fourth output terminal is switched at a first preset period.

[0015] Optionally, the control method for the multi-pole radio frequency device further includes: In the bipolar mode or the unipolar mode, the third input terminal and the fourth input terminal are switched to be connected with the third output terminal and the fourth output terminal. During a treatment, the heat generated by any one of the treatment electrodes connected to the first interface is W1, and the heat generated by connecting to the second interface is W2, where 0.5≤W1 / W2≤2.0.

[0016] Optionally, the control method for the multi-pole radio frequency device further includes: The first output terminal and the second output terminal are controlled to switch between the unipolar mode and the bipolar mode at a second preset period.

[0017] Optionally, the control method for the multi-pole radio frequency device further includes: In the combined mode, during a single treatment, the heat generated in the unipolar mode is W3, and the heat generated in the bipolar mode is W4, where 0.5 ≤ W3 / W4 ≤ 2.

[0018] Optionally, the control method for the multi-pole radio frequency device further includes: Obtain the temperature of the electrode pad of the treatment electrode; Determine whether the temperature of the electrode sheet exceeds the preset safe temperature threshold; If so, control the RF power supply to stop RF energy output; If not, control the RF power supply to maintain effective RF energy output.

[0019] The present invention also proposes a radiofrequency therapy device, including the multipolar radiofrequency device as described above.

[0020] In this invention, on one hand, a second switching circuit is provided between the radio frequency power supply and the treatment electrode and return electrode. By controlling the second switching circuit, the connection relationship between the treatment electrode and return electrode and the first and second interfaces of the radio frequency power supply is adjusted, so that the first and second interfaces of the radio frequency power supply can be alternately connected to the third and fourth input terminals of the second switching circuit in the multipolar radio frequency device of this invention. On the other hand, the first switching circuit changes the connection relationship between the treatment electrode and return electrode and the first and second interfaces, so that the multipolar radio frequency device can switch between unipolar and bipolar modes. Thus, the first and second interfaces of the radio frequency power supply can continuously switch between positive and negative electrodes to ensure uniform radio frequency energy output, guaranteeing a good thermal effect in both parallel and vertical directions at the treatment site, achieving a good three-dimensional uniform energy effect. Of course, the second switching circuit and the first switching circuit can coexist, or only one of them can be provided. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the multi-pole radio frequency device of the present invention; Figure 2 for Figure 1 A schematic diagram of the electrode arrangement in one embodiment of a therapeutic electrode; Figure 3 for Figure 1 A schematic diagram of the electrode arrangement in another embodiment of the therapeutic electrode; Figure 4 for Figure 1 A schematic diagram of the electrode arrangement of one embodiment of the therapeutic electrode; Figure 5This is a schematic diagram of another embodiment of the multi-pole radio frequency device of the present invention; Figure 6 This is a schematic diagram of the circuit structure of an embodiment of the multi-pole radio frequency device of the present invention; Figure 7 This is a flowchart illustrating an embodiment of the control method for the multi-pole radio frequency device of the present invention; Figure 8 This is a schematic diagram of another embodiment of the multi-pole radio frequency device of the present invention; Figure 9 This is a schematic diagram of another embodiment of the multi-pole radio frequency device of the present invention; Figure 10 This is a schematic diagram of another embodiment of the multi-pole radio frequency device of the present invention; Figure 11 This is a schematic diagram of another embodiment of the multi-polar radio frequency device of the present invention.

[0023] Explanation of icon numbers: 10. Radio frequency power supply; 20. Second switch switching circuit; 30. First switch switching circuit; 40. Treatment electrode; 50. Return electrode; 60. Controller; 100. Treatment handpiece; 110. Electrode pad; 120. Grip part; 130. Switch switching button.

[0024] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention 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 indication will also change accordingly.

[0027] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are 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 meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those 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 by this invention.

[0028] In existing technologies, radiofrequency devices generally employ monopolar or bipolar approaches. Monopolar radiofrequency devices have a deeper penetration depth, while bipolar radiofrequency devices have a shallower penetration depth. On one hand, users need to switch between monopolar and bipolar radiofrequency devices depending on their needs, leading to low treatment efficiency and suboptimal results. On the other hand, the return electrode of a monopolar radiofrequency device needs to be attached to other parts of the body to produce a deeper therapeutic effect, making it cumbersome for single-person use at home and reducing user engagement. Furthermore, during treatment, the heat generated at the two output ports of the radiofrequency power supply can differ, easily causing a thermal difference in the radiofrequency energy output from both ends. This thermal difference affects the uniform output of radiofrequency energy, and uneven radiofrequency energy can cause the treatment effect to deviate from expectations, thus impacting the overall therapeutic efficacy of the radiofrequency therapy device.

[0029] This invention proposes a multipolar radio frequency device.

[0030] In the embodiments of the present invention, please refer to Figures 1 to 9 The multipolar radio frequency device includes: The radio frequency power supply 10 has a first interface and a second interface with opposite polarities. Return electrode 50; The treatment electrode 40 includes multiple electrode pads 110; The first switch switching circuit 30 has a first input terminal and a second input terminal that are electrically connected to the first interface and the second interface respectively. The first output terminal of the first switch switching circuit 30 is electrically connected to the treatment electrode 40. The second output terminal of the first switch switching circuit 30 is switchably electrically connected to the return electrode 50 or a portion of the electrode sheet 110. The first output terminal and the second output terminal are respectively connected to the first input terminal and the second input terminal. And / or, the second switch switching circuit 20, the third input terminal of the second switch switching circuit 20 is connected to the first interface, the fourth input terminal of the second switch switching circuit 20 is connected to the second interface, and the second switch switching circuit 20 has a third output terminal and a fourth output terminal; When the multipolar radio frequency device includes the first switch switching circuit 30, the controller 60 also has a unipolar mode and a bipolar mode. In the unipolar mode, the controller 60 controls the first output terminal and the second output terminal to be electrically connected to the treatment electrode 40 and the return electrode 50, respectively. In the bipolar mode, the controller 60 controls the first output terminal and the second output terminal to be connected to at least one electrode piece 110, respectively. When the multi-pole radio frequency device includes the second switching circuit 20, the controller 60 controls the third input terminal and the fourth input terminal to switch to the third output terminal and the fourth output terminal respectively.

[0031] In this invention, on one hand, a second switching circuit 20 is provided between the radio frequency power supply 10 and the treatment electrode 40 and the return electrode 50. By controlling the second switching circuit 20, the connection relationship between the treatment electrode 40 and the return electrode 50 and the first and second interfaces of the radio frequency power supply 10 is adjusted, so that the first and second interfaces of the radio frequency power supply 10 can be alternately connected to the third and fourth input terminals of the second switching circuit 20 in the multipolar radio frequency device of this invention. On the other hand, the first switching circuit 30 is used to change the connection relationship between the treatment electrode 40 and the return electrode 50 and the first and second interfaces, so that the multipolar radio frequency device can switch between unipolar mode and bipolar mode. In this way, the first and second interfaces of the radio frequency power supply 10 can be continuously switched between positive and negative electrodes to uniformly output radio frequency energy and ensure that a good thermal effect is generated in both the parallel and vertical directions at the treatment site, achieving a good three-dimensional uniform energy effect. Of course, the second switching circuit 20 and the first switching circuit 30 can coexist, or only one of them can be provided.

[0032] The controller 60 controls the second switch switching circuit 20 to first connect the third input terminal and the third output terminal, then connect the fourth input terminal and the fourth output terminal, and then switch to connect the fourth input terminal and the third output terminal, and finally connect the third input terminal and the fourth output terminal. In this way, when the second switch switching circuit 20 is working, the treatment electrode 40 and the return electrode 50 are connected to the first interface or the second interface for an equal amount of time, or are maintained within a similar range, so as to balance the heat of the first interface and the second interface. Optionally, in this embodiment, when the input terminals and output terminals of the second switch switching circuit 20 are switched, the controller 60 or manual mode further controls the first switch switching circuit 30 to adjust the connection of all or part of the electrode pieces 110 of the treatment electrode 40 to the third output terminal, and the return electrode 50 to the fourth output terminal, so that the treatment electrode 40 and the return electrode 50 carry opposite polarities, thereby forming a multipolar radio frequency device in unipolar mode; Optionally, in this embodiment, the controller 60 or manual mode further controls the first switch switching circuit 30 to adjust the connection relationship between the multiple electrode pieces 110 of the treatment electrode 40 and the first and second output terminals, so that at least one of the multiple electrode pieces 110 is connected to the first output terminal, and the remaining electrode pieces 110 or at least one of the remaining electrode pieces 110 is connected to the second output terminal, so as to ensure that the polarity of at least one electrode piece 110 of the treatment electrode 40 is opposite to the polarity of at least one of the remaining electrode pieces 110, thereby forming a multipolar radio frequency device in bipolar mode. By utilizing the cooperation of the second switching circuit 20 and the first switching circuit 30, the multipolar radio frequency device of the present invention can switch between unipolar and bipolar modes, while the connection relationship between the first and second interfaces of the radio frequency power supply 10 and the third and fourth input terminals is continuously changed. This makes the radio frequency energy of the multipolar radio frequency device of the present invention more uniform in output and treatment area, so as to ensure the treatment effect.

[0033] It should be noted that the electrode pad 110 mentioned in this technical solution is only disposed on the treatment electrode 40. Furthermore, during a single treatment, in the combined mode formed by switching between unipolar and bipolar modes, the total radiofrequency energy output in unipolar mode tends to be equal to the total radiofrequency energy output in bipolar mode. The first input terminal, second input terminal, third input terminal, fourth input terminal, first output terminal, second output terminal, third output terminal, and fourth output terminal can be a multi-branch terminal or a single-branch terminal.

[0034] It is understood that the controller can simultaneously control the first switching circuit 30 and the second switching circuit 20. In one embodiment, the first switching circuit 30 and the second switching circuit 20 can be the same switching circuit, with the controller 60 enabling switching between unipolar and bipolar modes, as well as switching with the first and second interfaces respectively. Specifically, when in unipolar, bipolar, or combined mode, the controller 60 can further control the switching between the connection ports of the treatment electrode 40 and the return electrode 50 in the switching circuit, so that the heat difference between the first and second interfaces approaches zero. Alternatively, the switching circuit at this location may only retain the switching between the first and second interfaces, ensuring that the total radio frequency energy output by the first and second interfaces of the radio frequency power supply tends to be equal during a single treatment, thus ensuring the treatment effect.

[0035] In one embodiment, please refer to Figures 1 to 5 When the multipolar radio frequency device includes the second switching circuit 20, the controller 60 controls the operation of the second switching circuit 20 to control the connection between the third and fourth input terminals and the third and fourth output terminals to switch at least once. It should be noted that during treatment, if the connection points of the positive and negative electrodes with the radio frequency power supply 10 remain constant, a heat difference can easily occur between the first and second interfaces of the radio frequency power supply 10. Therefore, the controller 60 controls the second switching circuit 20 to continuously switch the connection between the third and fourth input terminals and the third and fourth output terminals, respectively, so that the heat generated by the radio frequency power supply 10 is evenly distributed on the first and second interfaces, reducing the heat difference between the first and second interfaces and ensuring uniform output of radio frequency energy from the radio frequency power supply 10.

[0036] Specifically, in this embodiment, please refer to Figure 1 and Figure 4 The controller 60 controls the operation of the second switching circuit 20 to switch the connection between the third and fourth input terminals and the third and fourth output terminals at a first preset cycle. Thus, the controller 60 controls the switching frequency of the second switching circuit 20 at the first preset cycle according to a preset algorithm program. In one specific embodiment, the duration of a single treatment is set between 20ms and 12s, and the controller 60 can control the switching time of the second switching circuit 20 to be set between 0.1ms and 2ms to improve the uniform output of radio frequency energy and thus ensure the treatment effect. Furthermore, the controller 60 can also enter a custom mode to set the first preset cycle according to the user's own usage habits.

[0037] In one embodiment, please refer to Figures 1 to 5When the multipolar radio frequency device includes the first switching circuit 30, the controller 60 controls the first switching circuit 30 to operate, so as to control the first output terminal and the second output terminal to switch at least once between unipolar mode and bipolar mode. In unipolar mode, the electrode plates 110 on the treatment electrode 40 have the same polarity, for example, both are positive, and the return electrode 50 has the same polarity, for example, both are negative. At this time, the treatment electrode 40 and the return electrode 50 maintain opposite polarities under the control of the first switching circuit 30. Because the human body parts corresponding to the treatment electrode 40 and the return electrode 50 are relatively far apart, the radio frequency energy output from the electrode plate 110 of the treatment electrode 40 can act on deep tissues to achieve the purpose of vertical treatment of the treatment site. In bipolar mode, at least one electrode piece 110 on the treatment electrode 40 has an opposite polarity to the other electrode pieces 110. Because two electrode pieces 110 with opposite polarities are on the treatment electrode 40, the radiofrequency energy pathway in the body is shorter in bipolar mode, and the radiofrequency energy can only act on a superficial part of the body to achieve the purpose of parallel treatment of the treatment site. Thus, by controlling the first switching circuit 30 through the controller 60, the switching between unipolar and bipolar modes is realized, so that the radiofrequency energy output by unipolar and bipolar modes is equal in each treatment process. This ensures that the multipolar radiofrequency device of the present invention can achieve a three-dimensional thermal effect distribution, thereby improving the treatment effect.

[0038] Specifically, in this embodiment, please continue to refer to... Figure 4The controller 60 controls the operation of the first switching circuit 30 to control the first and second output terminals to switch between unipolar and bipolar modes at a second preset cycle. Thus, the user can select a preset switching cycle according to their needs, and use the controller 60 to execute the second preset cycle command to control the working duration and switching time of the multipolar radiofrequency device in unipolar and bipolar modes respectively. Alternatively, the user can enter a custom mode, select a suitable working cycle, and save the custom data to the controller 60, so that the controller 60 switches between unipolar and bipolar modes based on the custom data. This allows the electrode pad 110 to achieve a thermal effect distribution in the parallel and vertical directions corresponding to the treatment area, resulting in a better three-dimensional treatment effect. It should be noted that regardless of whether the cycle is system-preset or user-defined, the radiofrequency energy output in unipolar and bipolar modes is equal during a single treatment. In other embodiments, it is necessary to manually switch between monopolar and bipolar modes during use, or change the working time of monopolar or bipolar modes at any time according to the usage conditions. In this way, the user can manually operate the switch button 130 on the treatment handpiece 100 to output the switching command to the controller 60, and switch between monopolar and bipolar modes through the controller 60.

[0039] Without loss of generality, in one embodiment, the controller 60 can be a microprocessor such as a single-chip microcomputer, DSP, or FPGA, or it can be implemented using a dedicated chip for radiofrequency therapy devices; no limitation is made here. Those skilled in the art can integrate some hardware circuits and preset algorithm programs into the controller 60, and use the controller 60 to run the algorithm program to achieve automatic switching between unipolar and bipolar modes of the multipolar radiofrequency device of the present invention, as well as the operation of the second switching circuit 20. Users can also select the corresponding radiofrequency frequency or the operating duration of the second switching circuit 20 in unipolar or bipolar modes according to their own needs.

[0040] Without loss of generality, please continue to refer to Figures 6 to 9 The multiple electrode pads 110 in the treatment electrode 40 can be arranged in an array, in a line, or in a circle. In bipolar mode, the polarity of each electrode pad 110 and its adjacent electrode pads 110 can be the same or different. For example, the electrode pads 110 can be arranged in rows, alternating between positive and negative polarities, that is, the polarity of one row of electrode pads 110 is positive and the polarity of the electrode pads 110 in the adjacent row is negative. Alternatively, the polarity of each electrode pad 110 and its adjacent electrode pads 110 can be opposite, that is, the electrode pads 110 in each row and each column are arranged in alternating positive and negative polarities. Of course, this arrangement of electrode pads 110 can also be applied to unipolar mode to enhance the radiofrequency energy of a single polarity carried by the electrode pads 110 of the treatment electrode 40.

[0041] Furthermore, in one embodiment, please refer to Figure 1 and Figures 6 to 9 The contact area of ​​the return electrode 50 is larger than that of the treatment electrode 40. It should be noted that the size of the contact area between the electrode and the skin is related to the magnitude of the thermal effect of the radiofrequency energy. In the two contact areas formed in the radiofrequency circuit, the thermal effect of the radiofrequency energy is mainly generated at the smaller contact area. Here, the contact area is the contact area between the electrode sheet 110 or the return electrode 50 and the skin of the treatment site. Thus, in monopolar mode, the radiofrequency thermal effect is mainly generated by the treatment electrode 40 acting on the treatment site to ensure the treatment effect. Of course, in other embodiments, the contact area of ​​the return electrode 50 may also be slightly smaller than the contact area of ​​the electrode sheet 110.

[0042] Specifically, in this embodiment, please continue to refer to... Figure 1 and Figures 6 to 9 The multipolar radiofrequency device has a grip portion 120, and a return electrode 50 is disposed on the grip portion 120. Without loss of generality, the multipolar radiofrequency device includes a treatment handle 100, with the grip portion 120 located in the middle of the treatment handle 100. When using it, the user generally holds the grip portion 120 with their hand, meaning the user's palm is in contact with the return electrode 50. Thus, in monopolar mode, the polarity of the electrode pad 110 of the treatment electrode 40 is opposite to that of the return electrode 50. Here, the grip portion 120 is equivalent to the return electrode 50. The radiofrequency energy emitted by the electrode pad 110 can produce a thermal effect on the treatment site, thereby achieving a therapeutic effect. Compared to separately setting the return electrode 50 and forming a circuit by contacting other parts of the body, placing the return electrode 50 on the grip portion 120 improves the convenience for users to use the multipolar radiofrequency device, making it suitable for home users. Of course, in other embodiments, the return electrode 50 can be disposed on a branch protruding from the treatment handle 100. When the electrode plate 110 of the treatment electrode 40 contacts the treatment area, the return electrode 50 can also contact the human body to form a circuit. Alternatively, in another embodiment, the multipolar radiofrequency device is a large-scale therapeutic instrument used in hospitals or beauty clinics, etc., wherein the treatment electrode 40 and the return electrode 50 each have a connecting structure to the treatment host, and the second switching circuit 20 and the first switching circuit 30 are disposed at the junction of the treatment electrode 40 and the return electrode 50.

[0043] In one embodiment, the radio frequency power supply 10 includes one or more independent power supplies, which are connected to the second switching circuit 20. It should be noted that the power supply can be an external power source or a rechargeable lithium battery, and can be a continuous output power supply, a pulse output power supply, or a power supply that combines continuous and pulse outputs. When using a single power supply, the size of the multipolar radio frequency device can be reduced. When multiple independent power supplies are used, each power supply is connected to the third and fourth input terminals of the second switching circuit 20, respectively. Without loss of generality, the radio frequency power supply 10 also includes a frequency adjuster. Whether the second switching circuit 20 or the first switching circuit 30 is operating, the frequency adjuster can adjust the radio frequency output by the radio frequency power supply 10, thereby adjusting the treatment level of the multipolar radio frequency device to achieve a more effective treatment effect.

[0044] This invention also proposes a control method for a multi-pole radio frequency device, applicable to the multi-pole radio frequency device described above. Please refer to [link / reference needed]. Figure 5 The control method for the multi-polar radio frequency device includes: Determine user input signals; If the signal is in unipolar mode, then enter unipolar mode and control the first output terminal and the second output terminal to be electrically connected to the treatment electrode 40 and the return electrode 50 respectively, so that the polarity of the multiple electrode pieces 110 of the treatment electrode 40 is the same. If the signal is in bipolar mode, then enter bipolar mode and control the first output terminal and the second output terminal to connect to at least one electrode piece 110 respectively, so that the polarity of at least one electrode piece 110 in the treatment electrode 40 is opposite to the polarity of the other electrode pieces 110. If the signal is in combined mode, then the first output terminal and the second output terminal are controlled to switch between the unipolar mode and the bipolar mode at least once.

[0045] The user determines whether to use monopolar mode, bipolar mode, or a combination of both based on the location of the treatment area. Based on the determination result, the user issues an execution signal to the controller 60 accordingly. The control method of this multipolar radiofrequency device is based on the user's judgment of the relative depth of the treatment area to the skin.

[0046] In this embodiment, when the treatment area is relatively deep in the skin, the user inputs a unipolar mode signal, and the controller 60 controls the first switch switching circuit 30 to switch to unipolar mode. In unipolar mode, the first switch switching circuit 30, based on the control of the controller 60, connects the treatment electrode 40 to the third output terminal and the return electrode 50 to the fourth output terminal, so that the treatment electrode 40 and the return electrode 50 maintain opposite polarities. Since the treatment electrode 40 and the return electrode 50 form a long path on the human body, the treatment electrode 40 can generate a thermal effect on the deeper treatment area to achieve radiofrequency energy penetrating deep into the skin.

[0047] When the area to be treated is relatively shallow, the user inputs a bipolar mode signal, and the controller 60 controls the first switch switching circuit 30 to switch to bipolar mode. In bipolar mode, a portion of the electrode pads 110 on the treatment electrode 40 are connected to the third output terminal, and another portion of the electrode pads 110 are connected to the fourth output terminal, so that at least one electrode pad 110 on the treatment electrode 40 has an polarity opposite to that of the other electrode pads 110. Since the pathway formed by the electrode pads 110 carrying opposite polarities on the treatment electrode 40 on the human body is shorter, the electrode pad 110 with the smaller contact area among the two portions of electrode pads 110 can generate a thermal effect on the shallower area to be treated.

[0048] When the depth of the treatment area relative to the skin is suitable for switching between monopolar and bipolar modes, i.e., in combined mode, the user inputs a signal for combined mode, and the controller 60 controls the first switching circuit 30 to switch between monopolar and bipolar modes at least once. Specifically, if effective treatment cannot be achieved using only one mode, the operating mode can be either monopolar or bipolar when the multipolar radiofrequency device of this invention is initially started. After a period of time, it switches from monopolar to bipolar mode, or vice versa, with the operating mode switching at least once throughout the entire treatment phase. Since the effective areas differ between monopolar and bipolar modes, this embodiment adopts a monopolar / bipolar mode switching operating mode to expand the effective area and improve the treatment effect, ensuring that the treatment area achieves the expected treatment effect in both parallel and perpendicular directions relative to the skin. It should be noted that in this embodiment, during a single treatment in the combined mode, the total radiofrequency energy output by the unipolar mode is equal to the total radiofrequency energy output by the bipolar mode. That is, during the working time corresponding to the unipolar mode and the bipolar mode, the total radiofrequency energy output by the unipolar mode is equal to the total radiofrequency energy output by the bipolar mode.

[0049] Optionally, in one embodiment, in bipolar or unipolar mode, the connection between the third and fourth input terminals and the third and fourth output terminals is switched at least once. It is understood that in unipolar or bipolar mode, including cases of only unipolar mode, only bipolar mode, and only combined mode, the second switching circuit 20, based on the control of the controller 60, can connect the third and fourth input terminals to the third and fourth output terminals respectively, or connect the third and fourth input terminals to the fourth and third output terminals respectively, or switch the connection between the third and fourth input terminals and the third and fourth output terminals at least once, to ensure that in unipolar or bipolar mode, the two interfaces of the RF power supply 10 output relatively uniform RF energy, achieving a better therapeutic effect.

[0050] Furthermore, in one embodiment, the control method of the multipolar radiofrequency device further includes controlling the connection between the third and fourth input terminals and the third and fourth output terminals to switch at a first preset cycle in either bipolar or unipolar mode. Specifically, during treatment, to ensure that the thermal difference between the first and second interfaces of the radiofrequency power supply 10 approaches zero, that is, when the second switching circuit 20 is working, the treatment electrode 40 and the return electrode 50 are connected to the first or second interface for an equal or similar time. Thus, by setting the second switching circuit 20 to work at a first preset cycle through the controller 60, in either unipolar or bipolar mode, the second switching circuit 20, based on the control of the controller 60, continuously switches the connection between the third and fourth input terminals and the third and fourth output terminals at a first preset cycle, so that the first and second interfaces of the radiofrequency power supply 10 can output radiofrequency energy relatively uniformly to achieve the expected therapeutic effect.

[0051] Further, in this embodiment, in bipolar or unipolar mode, the third and fourth input terminals are switched to connect with the third and fourth output terminals. During one treatment cycle, the heat generated by any electrode piece 110 of the treatment electrode 40 connected to the first interface is W1, and the heat generated by connecting to the second interface is W2, where 0.5 ≤ W1 / W2 ≤ 2.0. It should be noted that W1 and W2 represent the cumulative heat generated by any electrode piece 110 of the treatment electrode 40 corresponding to the first and second interfaces respectively during one treatment cycle. It can be understood that, regardless of unipolar or double-sided mode, during one treatment cycle, W1 and W2 are the product of the working time of the electrode piece 110 corresponding to the first and second interfaces respectively and the corresponding power, more specifically reflecting the radio frequency energy output by the first and second interfaces to the electrode piece 110. That is, during one treatment cycle, the ratio of the radio frequency energy generated by the first and second interfaces to the treatment electrode 40 ranges from 0.5 to 2.0. In a specific embodiment, W1 / W2 can be 0.5, 1, or 2.

[0052] In one embodiment, the control method of the multipolar radiofrequency device further includes controlling the first output terminal and the second output terminal to switch between unipolar mode and bipolar mode at a second preset cycle. Based on a comprehensive understanding of the depth of the treatment area relative to the skin, during treatment, the controller 60 controls the first switching circuit 30 to operate at a second preset cycle. Specifically, when the multipolar radiofrequency device of the present invention is initially started, its operating mode can be either unipolar mode or bipolar mode. Then, it switches to the other mode at a second preset cycle. The operating mode throughout the entire treatment phase is a combined mode, switching at a second preset cycle. However, it is necessary to ensure that during one treatment, the total radiofrequency energy output in the unipolar mode of the combined mode is equal to the total radiofrequency energy output in the bipolar mode. Since the effective areas of unipolar mode and bipolar mode are different, this embodiment adopts a unipolar / bipolar mode switching operating mode, so that the treatment area achieves the expected treatment effect in both parallel and perpendicular directions relative to the skin. Of course, users can also use the controller 60 to customize the treatment cycle in monopolar and bipolar modes according to the actual adjustment and changes of the treatment area. Alternatively, users can manually input commands to the controller 60 through the switch button 130 to switch between monopolar and bipolar modes.

[0053] Further, in this embodiment, in the combined mode, during a single treatment, the heat generated in the unipolar mode is W3, and the heat generated in the bipolar mode is W4, where 0.5 ≤ W3 / W4 ≤ 2. It should be noted that W3 and W4 represent the cumulative heat generated in the unipolar and bipolar modes respectively during a single treatment in the combined mode. It can be understood that in the combined mode, W3 and W4 are the product of the working time and corresponding power in the unipolar and bipolar modes during a single treatment, respectively. That is, the heat generated by the unipolar mode on the deep treatment area and the heat generated by the bipolar mode on the superficial treatment area, so that the quantified ratio of the thermal effect of the treatment area in the parallel and perpendicular directions relative to the skin is between 0.5 and 2, can achieve a three-dimensional uniform thermal effect in the treatment area by the multipolar radiofrequency device of the present invention, thereby achieving better treatment results. In a specific embodiment, W3 / W4 can be 0.5, 1, or 2.

[0054] To better control the output energy of a multi-pole radio frequency device, in one embodiment, the control method for the multi-pole radio frequency device further includes: The temperature of the electrode pad 110 of the treatment electrode 40 is obtained; Determine whether the temperature of electrode 110 exceeds the preset safe temperature threshold; If so, control the RF power supply 10 to stop RF energy output; If not, control the RF power supply 10 to maintain effective RF energy output.

[0055] In this embodiment, a temperature sensor can be placed on the treatment electrode 40 to detect the temperature on any one of the electrode pieces 110. Here, regardless of whether the single-pole mode, double-pole mode, combined mode, or the second switch switching circuit works together or separately, as long as the multi-pole radio frequency device of the present invention is in operation, the temperature sensor will detect the temperature of the electrode piece 110.

[0056] It should be noted that the effective treatment temperature of the radiofrequency therapy device is between 38℃ and 48℃. Within this temperature range, the electrode pads 110 on the treatment electrode 40 can effectively generate a thermal effect on the treatment site, thereby achieving the therapeutic purpose. In a specific embodiment, the safe temperature threshold can be set to 45℃, 48℃, or 49℃ depending on the setting. Thus, based on the temperature detected by the temperature sensor on the electrode pads 110, and comparing this temperature with the safe temperature threshold, specifically: When the temperature exceeds the safe temperature threshold, the controller 60 controls the RF power supply 10 to stop outputting RF energy; when the temperature is less than or equal to the safe temperature threshold, the controller 60 controls the RF power supply 10 to maintain effective energy output.

[0057] The present invention also proposes a radiofrequency therapy device, which includes a multipolar radiofrequency device. The specific structure of the multipolar radiofrequency device is as described in the above embodiments. Since the radiofrequency therapy device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0058] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A multi-polar radio frequency device, characterized in that, include: The radio frequency power supply has a first interface and a second interface with opposite polarities. A treatment handle and a grip, wherein the grip is located in the middle of the treatment handle; Return electrode; The treatment electrode includes multiple electrode pads located at the end of the treatment handle and used to contact the skin. The first switching circuit has a first input terminal and a second input terminal that are electrically connected to the first interface and the second interface, respectively. The first output terminal of the first switching circuit is electrically connected to the treatment electrode. The second output terminal of the first switching circuit is switchably electrically connected to the return electrode or part of the electrode sheet. The first output terminal and the second output terminal are respectively connected to the first input terminal and the second input terminal. The controller further comprises a unipolar mode and a bipolar mode. In the unipolar mode, the controller controls the first output terminal and the second output terminal to be electrically connected to the treatment electrode and the return electrode, respectively. In the bipolar mode, the controller controls the first output terminal and the second output terminal to be connected to at least one of the electrode plates, respectively. The controller switches between the unipolar mode and the bipolar mode. In the unipolar mode, the treatment electrode is used to treat deeper skin, and in the bipolar mode, the treatment electrode is used to treat shallower skin.

2. The multi-polar radio frequency device as described in claim 1, characterized in that, The multi-pole radio frequency device includes a second switching circuit, the third input terminal of the second switching circuit is connected to the first interface, the fourth input terminal of the second switching circuit is connected to the second interface, the second switching circuit has a third output terminal and a fourth output terminal, the third output terminal and the fourth output terminal are respectively connected to the third input terminal and the fourth input terminal; The controller is used to control the operation of the second switch switching circuit to control the third input terminal and the fourth input terminal to switch their connections to the third output terminal and the fourth output terminal, respectively.

3. The multi-polar radio frequency device as described in claim 2, characterized in that, The controller is used to control the operation of the second switch switching circuit to control the connection between the third input terminal and the fourth input terminal and the third output terminal and the fourth output terminal to switch at a first preset cycle. The duration of the treatment phase is in the range of 20ms to 12s, and the switching time of the second switch switching circuit is in the range of 0.1ms to 2ms.

4. The multi-polar radio frequency device as described in claim 2, characterized in that, During a single treatment, the heat generated when any one of the treatment electrodes is connected to the first interface is W1, and the heat generated when connected to the second interface is W2, where 0.5 ≤ W1 / W2 ≤ 2.

0.

5. The multi-polar radio frequency device as described in claim 2, characterized in that, When the second switching circuit is working, the treatment electrode and the return electrode are connected to the first interface or the second interface for the same amount of time.

6. The multi-polar radio frequency device according to any one of claims 1 to 5, characterized in that, The system includes a combined mode in which the controller controls the first switching circuit to operate, thereby controlling the first output terminal and the second output terminal to switch between the unipolar mode and the bipolar mode at least once.

7. The multi-polar radio frequency device as described in claim 6, characterized in that, The controller is used to control the first switching circuit to operate, so as to control the first output terminal and the second output terminal to switch between the unipolar mode and the bipolar mode at a second preset period.

8. The multi-polar radio frequency device as described in claim 7, characterized in that, In the combined mode, during a single treatment, the heat generated in the unipolar mode is W3, and the heat generated in the bipolar mode is W4, where 0.5 ≤ W3 / W4 ≤ 2.

9. The multi-polar radio frequency device as described in claim 6, characterized in that, The controller is used to switch working modes based on the judgment of the relative depth of the skin at the treatment site; When the area to be treated is relatively deep to the skin, the controller controls the first switch switching circuit to switch to unipolar mode; When the area to be treated is relatively superficial to the skin, the controller controls the first switch switching circuit to switch to bipolar mode; When the treatment area is at a suitable depth relative to the skin, the controller controls the first switch switching circuit to switch to the combined mode.

10. The multi-polar radio frequency device as claimed in claim 6, characterized in that, The electrode sheets are arranged in an array, either in a line or in a circle.

11. A radiofrequency therapy device, characterized in that, Includes the multipolar radio frequency device as described in any one of claims 1 to 10.

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