Radio frequency instrument

Abstract

The utility model relates to a radio frequency instrument, and belongs to the technical field of beauty equipment. The radio frequency comb comprises a radio frequency body and a comb tooth seat. The radio frequency body comprises a holding part and a radio frequency part connected with the holding part, and the radio frequency part is provided with a first connecting part; the comb tooth seat comprises a seat main body and a plurality of comb tooth electrodes arranged on the seat main body; the comb tooth electrode is convexly arranged on the side wall of the seat main body; an accommodating cavity with a top opening is formed in the top, deviating from the comb tooth electrode, of the seat main body, a second connecting part is arranged in the accommodating cavity, and the second connecting part is detachably connected with the first connecting part; when the radio frequency part is accommodated in the accommodating cavity, the first connecting part is in butt joint with the second connecting part, so that the comb tooth seat is fixed on the radio frequency body, the comb tooth seat is prevented from being separated from the radio frequency body, and the stability and the safety of the radio frequency instrument in the using process are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of beauty equipment, in particular to a radio frequency instrument. Background Art

[0002] Radiofrequency devices, one of the earliest established categories in the current home beauty device market, have been widely used to enhance skin firmness, revitalize the scalp, and promote hair growth. Radiofrequency devices for facial care typically utilize flat, conformable electrodes, while specialized radiofrequency hair care combs for scalp care utilize electrodes with long, cylindrical teeth.

[0003] In order to take into account both facial and scalp care, the current composite radio frequency instruments on the market usually insert the radio frequency body into the accommodating cavity in the comb tooth seat to achieve a detachable connection between the radio frequency body and the comb tooth seat.

[0004] However, this connection method lacks sufficient fixing force, which not only leads to instability during installation, requiring users to repeatedly adjust the comb holder and RF unit to the correct position, but also the comb holder is prone to detachment during use, resulting in a poor user experience. Utility Model Content

[0005] The purpose of the utility model is to solve the technical problem that the connection between the radio frequency body and the comb tooth seat of the traditional radio frequency instrument is unstable and easily separated.

[0006] In order to solve the above technical problems, the present application provides a radio frequency instrument, comprising: a radio frequency body, which includes a holding part and a radio frequency part connected to the holding part, and a first connecting part is provided on the radio frequency part; a comb tooth seat, which includes a seat body and a plurality of comb tooth electrodes arranged on the seat body; the comb tooth electrodes are protruding on the side wall of the seat body; a top-opening accommodating cavity is provided at the top of the seat body away from the comb tooth electrode, and a second connecting part is provided in the accommodating cavity, and the second connecting part is detachably connected to the first connecting part; when the radio frequency part is accommodated in the accommodating cavity, the first connecting part is docked with the second connecting part to fix the comb tooth seat on the radio frequency body.

[0007] In some examples of the present application, the first connecting part is a rib structure arranged on both sides of the RF part, which protrudes from the outer surface of the RF part; the second connecting part is a groove structure recessed on the side wall of the accommodating cavity of the seat body; the first connecting part can be snapped into the second connecting part to fix the comb tooth seat on the RF body.

[0008] In some examples of the present application, the first connecting portion is a groove structure arranged on both sides of the RF portion; the second connecting portion is a rib structure protruding from the side wall of the accommodating cavity of the seat body, which protrudes from the inner surface of the side wall of the accommodating cavity; the second connecting portion can be snapped into the first connecting portion to fix the comb tooth seat on the RF body.

[0009] In some examples of the present application, the first connecting portion is arranged on both sides of the width direction of the RF portion and extends along the length direction of the RF portion; the second connecting portion is arranged on both sides of the width direction of the seat body and extends along the length direction of the seat body.

[0010] In some examples of the present application, the first connecting portion is arranged on the peripheral side of the RF portion and extends along the height direction of the RF portion; the second connecting portion is arranged on the peripheral wall of the accommodating cavity of the seat body and extends along the height direction of the seat body.

[0011] In some examples of the present application, the second connecting portion extends along the height direction of the seat body to the top surface of the seat body, and forms an opening on the top surface of the seat body; the first connecting portion can be inserted into the second connecting portion along the top opening of the second connecting portion; a first magnetic part is provided on the bottom surface of the accommodating cavity of the seat body, and a second magnetic part matching the first magnetic part is provided on the RF part, and the first magnetic part and the second magnetic part are magnetically adsorbed.

[0012] In some examples of the present application, the first connecting part and the second connecting part are both magnets; there are multiple first connecting parts and multiple second connecting parts, multiple first connecting parts are arranged on the periphery of the RF part, and multiple second connecting parts are arranged on the periphery of the accommodating cavity of the seat body, so that the comb tooth seat is magnetically fixed on the RF body.

[0013] In some examples of the present application, the seat body includes a base plate and a side panel, the side panel is arranged at the outer edge of the base plate, the side panel and the base plate are combined to form the accommodating cavity, and the comb-tooth electrode is fixed on the side of the base plate away from the side panel.

[0014] In some examples of the present application, the bottom plate is an arc-shaped plate, and the height of the side panels gradually decreases along the length direction of the bottom plate.

[0015] In some examples of the present application, an RF electrode is provided on the RF part, and the RF electrode is arranged on the side of the RF part facing the comb tooth seat; when the RF part is accommodated in the accommodating cavity of the comb tooth seat, the RF electrode is electrically connected to the comb tooth electrode.

[0016] It can be seen from the above technical solution that the beneficial effects of the utility model are:

[0017] The present application provides a radio frequency instrument, which includes a radio frequency body and a comb tooth seat. The top of the comb tooth seat is provided with a top-opening receiving cavity for accommodating the radio frequency part of the radio frequency body. The first connecting portion on the radio frequency part and the second connecting portion on the comb tooth seat are detachably connected, so that the comb tooth seat can be firmly fixed to the radio frequency body, preventing the comb tooth seat from being separated from the radio frequency body, thereby ensuring the stability and safety of the radio frequency instrument during use. In addition, the detachable connection between the first connecting portion and the second connecting portion can also enable the radio frequency instrument to flexibly switch between usage scenarios. Whether it is used for facial care or scalp care, it can be achieved through a simple connection operation, further improving the convenience of the device and the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the three-dimensional structure of the radio frequency instrument in this embodiment.

[0019] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the radio frequency instrument from another angle.

[0020] Figure 3 The figure is a structural diagram of the radio frequency body and comb tooth seat of the radio frequency instrument according to one embodiment.

[0021] Figure 4 It is a structural diagram of the radio frequency body and comb tooth seat of the radio frequency instrument in another embodiment.

[0022] The following are the descriptions of the reference numerals:

[0023] 100. RF instrument; 10. RF body; 11. Grip; 12. RF unit; 121. RF electrode; 122. First connecting portion; 20. Comb tooth seat; 21. Seat body; 211. Bottom plate; 212. Side panel; 213. Accommodating cavity; 214. Second connecting portion; 215. First magnetic component; 22. Comb tooth electrode. DETAILED DESCRIPTION

[0024] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention is capable of various variations in different embodiments without departing from the scope of the present invention, and that the descriptions and illustrations herein are intended to be illustrative in nature and not to limit the present invention.

[0025] In the description of this application, it should be understood that in the embodiments shown in the drawings, indications of directions or positional relationships (such as up, down, left, right, front, and back) are merely for the convenience of describing this application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions will also change accordingly.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0027] In order to take into account both facial and scalp care, the commonly used method for composite radio frequency instruments currently on the market is to insert the radio frequency body into the accommodating cavity in the comb tooth holder to achieve a detachable connection between the radio frequency body and the comb tooth holder. However, the fixing force of this connection method is insufficient, which not only easily causes instability during installation, but also requires users to repeatedly adjust the comb tooth holder and the radio frequency part to get them into the correct position. Moreover, during use, the comb tooth holder is also easy to detach, resulting in a poor user experience. Therefore, this embodiment provides a new connection and fixing method for radio frequency instruments to solve the technical problem that the comb tooth holder is easy to fall off.

[0028] See also Figures 1 to 4 In this embodiment, the radio frequency instrument 100 includes a radio frequency body 10 and a comb tooth seat 20, and the radio frequency body 10 and the comb tooth seat 20 are detachably connected.

[0029] The RF body 10 includes a holding portion 11 and a RF portion 12 connected to the holding portion 11 . The RF portion 12 is provided with a first connecting portion 122 .

[0030] The comb holder 20 includes a main body 21 and a plurality of comb electrodes 22 disposed on the main body 21. The comb electrodes 22 protrude from the sidewalls of the main body 21. A top-opening accommodating cavity 213 is defined at the top of the main body 21, facing away from the comb electrodes 22. A second connecting portion 214 is disposed within the accommodating cavity 213, which is detachably connected to the first connecting portion 122. When the RF unit 12 is housed within the accommodating cavity 213, the first connecting portion 122 mates with the second connecting portion 214, securing the comb holder 20 to the RF body 10.

[0031] Users can choose whether to install the comb holder 20 based on their care needs. For facial care, users can directly use the pulsed current emitted by the RF unit 12 to care for their skin. For scalp care, the RF unit 12 is inserted into the accommodating cavity 213 of the comb holder 20, and the first connecting portion 122 and the second connecting portion 214 are connected to secure the two together. The scalp is then cared for using the comb electrodes 22 on the comb holder 20. This allows the RF device 100 to flexibly switch between usage scenarios, allowing both facial and scalp care to be achieved through simple connection operations, further improving the device's convenience and user experience.

[0032] See also Figure 1 and Figure 2 In some embodiments, the grip portion 11 on the RF body 10 can be configured to conform to the natural curved surface structure of the palm of the hand so that the user can hold it comfortably during use. The grip portion 11 can also be made of silicone or high-density plastic to provide a soft touch and prevent slipping.

[0033] In some embodiments, the RF unit 12 is connected to one end of the grip 11 and is smoothly connected to the grip 11. The RF unit 12 may be integrated with a RF generator, a power module, and a corresponding control circuit so that the RF unit 12 can emit a pulse current to massage the skin.

[0034] See also Figure 3 and Figure 4 In some embodiments, the RF unit 12 is provided with an RF electrode 121, which is disposed on a side of the RF unit 12 facing the comb tooth holder 20. When the RF unit 12 is accommodated in the accommodating cavity 213 of the comb tooth holder 20, the RF electrode 121 is electrically connected to the comb tooth electrode 22.

[0035] Specifically, the RF electrode 121 is located on the side of the RF unit 12 facing the comb holder 20. The RF electrode 121 can be a flat electrode or a raised cylindrical electrode, and its surface can be covered with a conductive material to ensure the transmission of the pulsed current. When the user places the RF electrode 121 on the RF unit 12 against the skin of the face or other area, the RF electrode 121 can emit a pulsed current to beautify the user's face or other area, thereby achieving a skin care effect.

[0036] When the user inserts the RF unit 12 into the accommodating cavity 213 of the comb holder 20, the RF electrode 121 automatically docks with the comb electrode 22 inside the comb holder 20, establishing an electrical connection. This direct docking of the RF electrode 121 and comb electrode 22 minimizes electrical resistance and current loss, maximizing the utilization of pulsed current. Furthermore, this docking method ensures that when the comb holder 20 is installed on the RF unit 12, the electrical connection is completed quickly and accurately, allowing the user to begin use without any additional steps.

[0037] See also Figure 3 and Figure 4 In some embodiments, the comb tooth base 20 includes a base body 21 and a side panel 212. The side panel 212 is disposed at the outer edge of the base 211, and the side panel 212 and the base 211 together form a receiving cavity 213. The comb tooth electrode 22 is fixed to the side of the base 211 away from the side panel 212.

[0038] The comb-tooth electrodes 22 beneath the base plate 211 are long, cylindrical and evenly spaced on the underside of the base plate 211. The comb-tooth electrodes 22 are longer than the RF electrodes 121, making them more suitable for scalp care. When the comb-tooth electrodes 22 come into contact with the scalp, they emit a pulsed current, promoting scalp vitality and healthy hair growth.

[0039] See also Figure 3 and Figure 4 In some embodiments, the bottom plate 211 is an arc-shaped plate. The height of the side panels 212 may gradually decrease along the length direction of the bottom plate 211 .

[0040] Specifically, because the scalp's surface is not flat but rather exhibits a certain curvature, the base plate 211 is designed to be curved, so that the free ends of the comb-tooth electrodes 22 fixed to the base plate 211 also form a curved surface. This allows for a better fit to the curve of the scalp. When the comb-tooth electrodes 22 contact the scalp, each one is ensured to be in close contact, ensuring that the pulsating current is evenly distributed across all areas of the scalp, thereby achieving a more balanced care effect.

[0041] The height of the side panels 212 gradually decreases along the length of the bottom plate 211, so that one end of the side panels 212 is higher and the other end is lower. This allows the RF portion 12 of the RF body 10 to enter the comb tooth seat 20 in both vertical and horizontal directions to connect with the comb tooth seat 20, thereby providing more diverse docking methods for the RF body 10 and the comb tooth seat 20.

[0042] See also Figure 3 and Figure 4 In some embodiments, the first connecting portion 122 is a rib structure provided on both sides of the RF unit 12, and the first connecting portion 122 protrudes from the outer surface of the RF unit 12. The second connecting portion 214 is a groove structure recessed on the sidewall of the accommodating cavity 213 of the seat body 21. The first connecting portion 122 can be snapped into the second connecting portion 214 to secure the comb holder 20 to the RF body 10.

[0043] The first connecting portion 122 is constructed as a strip-shaped rib structure. The ribs can be made of high-strength, wear-resistant materials to ensure that they will not wear or deform during frequent plugging and unplugging operations. The second connecting portion 214 is constructed as a groove structure recessed on the side wall of the accommodating cavity 213 of the seat body 21. The size and shape of the groove structure can be interference-fit with the rib structure to ensure that when the first connecting portion 122 is inserted, the rib structure can be precisely snapped into the groove structure, thereby forming a tight snap-on connection and achieving fixation between the comb seat 20 and the RF body 10.

[0044] When in use, the user only needs to align the RF part 12 with the accommodating cavity 213 of the comb tooth seat 20 and insert it. When the RF part 12 is fully inserted into the accommodating cavity 213, the rib structures on both sides of the RF part 12 will naturally slide into the grooves on the side walls of the accommodating cavity 213 and tightly engage with the inside of the groove. It not only makes the connection between the comb tooth seat 20 and the RF body 10 firm, prevents it from loosening due to accidental collision or vibration during use, but also provides good disassembly convenience. The user only needs to apply appropriate external force to deform the side 212, and can easily separate the comb tooth seat 20 from the RF body 10, thereby realizing the multi-functional conversion of the RF instrument 100.

[0045] It is conceivable that in some other embodiments, the first connecting portion 122 may also be a groove structure provided on both sides of the RF unit 12. The second connecting portion 214 is a rib structure provided on the side wall of the accommodating cavity 213 of the seat body 21, and protrudes from the inner surface of the side wall of the accommodating cavity 213. In other words, the protrusions and recesses on the comb tooth seat 20 and the RF unit 12 are interchanged to achieve fixation between the comb tooth seat 20 and the RF body 10.

[0046] See also Figure 3 In some embodiments, the first connection portion 122 is disposed on both sides of the RF portion 12 in the width direction and extends along the length direction of the RF portion 12. The second connection portion 214 is disposed on both sides of the seat body 21 in the width direction and extends along the length direction of the seat body 21.

[0047] Specifically, the first connecting portion 122 is a rib extending along the length of the RF portion 12, and correspondingly, the second connecting portion 214 is a groove extending along the length of the seat body 21. The RF body 10 can enter the accommodating cavity 213 of the comb tooth portion in a horizontal direction, so that the first connecting portion 122 on the RF portion 12 is horizontally engaged with the second connecting portion 214 on the comb tooth seat 20, thereby stably fixing the comb tooth seat 20 on the RF body 10, avoiding the loosening of the comb tooth seat 20 due to accidental loosening. When the RF body 10 needs to be separated from the comb tooth seat 20, the user only needs to apply appropriate external force to move the comb tooth seat 20 and the RF body 10 away from each other in the horizontal direction to achieve the separation of the comb tooth seat 20 from the RF body 10.

[0048] See also Figure 4 In some embodiments, the first connection portion 122 is disposed on the circumferential side of the RF portion 12 and extends along the height direction of the RF portion 12. The second connection portion 214 is disposed on the circumferential wall of the accommodating cavity 213 of the seat body 21 and extends along the height direction of the seat body 21.

[0049] Specifically, the first connecting portion 122 is constructed as a plurality of ribs extending along the height direction of the RF unit 12, and correspondingly, the second connecting portion 214 is constructed as a plurality of grooves extending along the height direction of the base body 21. The RF body 10 can vertically enter the accommodating cavity 213 of the comb tooth seat 20, so that the first connecting portion 122 on the RF unit 12 engages with the second wheel connecting portion on the comb tooth seat 20, so that the comb tooth seat 20 can be stably fixed to the RF body 10.

[0050] Please continue reading Figure 4 In some embodiments, the second connecting portion 214 extends along the height direction of the base body 21 to the top surface of the base body 21 and forms an opening on the top surface of the base body 21. The first connecting portion 122 can be inserted into the second connecting portion 214 along the top opening of the second connecting portion 214. Furthermore, a first magnetic member 215 is provided on the bottom surface of the accommodating cavity 213 of the base body 21, and a second magnetic member matching the first magnetic member 215 is provided on the RF unit 12. The first magnetic member 215 and the second magnetic member are magnetically attracted to each other.

[0051] Specifically, the second connecting portion 214 on the comb tooth holder 20 is a groove that extends upward to form a top opening, allowing the vertical ribs on the RF unit 12 to slide downward along the groove to enter the accommodating cavity 213 of the comb tooth holder 20. At this time, the first connecting portion 122 on the RF unit 12 can be interference-fitted into the second connecting portion 214 on the comb tooth holder 20.

[0052] Furthermore, in order to enhance the connection stability between the comb tooth holder 20 and the RF body 10, a first magnetic member 215 is provided on the bottom surface of the accommodating cavity 213 of the comb tooth holder 20, and a corresponding second magnetic member is provided on the RF part 12, so that the first magnetic member 215 and the second magnetic member are magnetically adsorbed to enhance the connection stability under this structure and prevent the comb tooth holder 20 from falling off abnormally.

[0053] In other embodiments, the first connecting portion 122 and the second connecting portion 214 may both be magnets. Multiple first connecting portions 122 and second connecting portions 214 are provided. Multiple first connecting portions 122 are arranged around the RF unit 12, and multiple second connecting portions 214 are arranged around the accommodating cavity 213 of the seat body 21, so that the comb tooth seat 20 is magnetically fixed to the RF body 10.

[0054] The first connecting portion 122 of the RF unit 12 is composed of multiple magnets evenly arranged around the RF unit 12. The comb holder 20 also has multiple second connecting portion 214 magnets arranged within the accommodating cavity 213, corresponding to the magnets in the RF unit 12. These magnets are also distributed around the accommodating cavity 213, their positions corresponding to the magnets in the RF unit 12.

[0055] During installation, the user simply aligns the RF unit 12 with the accommodating cavity 213 of the comb holder 20 and gently inserts it. The multiple magnets surrounding the RF unit 12 will automatically attract and mate with the magnets within the accommodating cavity 213. This magnetic connection method eliminates the need for complex operation steps, greatly facilitating daily use. The attraction between the magnets also ensures a secure connection between the RF unit 12 and the comb holder 20, preventing loosening or detachment due to vibration or pulling during use.

[0056] In summary, this embodiment provides a radio frequency instrument 100, which includes a radio frequency body 10 and a comb tooth seat 20. The top of the comb tooth seat 20 is provided with a top-opening accommodating cavity 213 for accommodating the radio frequency part 12 of the radio frequency body 10; and the detachable connection between the first connecting portion 122 on the radio frequency part 12 and the second connecting portion 214 on the comb tooth seat 20 enables the comb tooth seat 20 to be firmly fixed on the radio frequency body 10, preventing the comb tooth seat 20 from being separated from the radio frequency body 10, thereby ensuring the stability and safety of the radio frequency instrument 100 during use. In addition, through the detachable connection between the first connecting portion 122 and the second connecting portion 214, the radio frequency instrument 100 can also be flexibly switched to other usage scenarios. Whether it is used for facial care or scalp care, it can be achieved through a simple connection operation, further improving the convenience of the device and the user experience.

[0057] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. Therefore, all changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A radio frequency instrument, characterized in that: include: The radio frequency body comprises a gripping portion and a radio frequency portion connected to the gripping portion, wherein the radio frequency portion is provided with a first connecting portion; A comb tooth seat comprises a seat body and a plurality of comb tooth electrodes arranged on the seat body; the comb tooth electrodes are protruding on the side wall of the seat body; a top-opening accommodating cavity is provided at the top of the seat body facing away from the comb tooth electrodes, a second connecting part is provided in the accommodating cavity, and the second connecting part is detachably connected to the first connecting part; when the RF part is accommodated in the accommodating cavity, the first connecting part and the second connecting part are docked to fix the comb tooth seat on the RF body.

2. The radio frequency instrument according to claim 1, characterized in that The first connecting part is a rib structure arranged on both sides of the RF part, which protrudes from the outer surface of the RF part; the second connecting part is a groove structure recessed on the side wall of the accommodating cavity of the seat body; the first connecting part can be snapped into the second connecting part to fix the comb tooth seat on the RF body.

3. The radio frequency instrument according to claim 1, characterized in that: The first connecting part is a groove structure arranged on both sides of the RF part; the second connecting part is a rib structure protruding from the side wall of the accommodating cavity of the seat body, which protrudes from the inner surface of the side wall of the accommodating cavity; the second connecting part can be snapped into the first connecting part to fix the comb tooth seat on the RF body.

4. The radio frequency instrument according to claim 2, characterized in that: The first connection parts are arranged on both sides of the RF part in the width direction and extend along the length direction of the RF part; the second connection parts are arranged on both sides of the seat body in the width direction and extend along the length direction of the seat body.

5. The radio frequency instrument according to claim 2, characterized in that: The first connecting portion is arranged on the peripheral side of the RF portion and extends along the height direction of the RF portion; the second connecting portion is arranged on the peripheral wall of the accommodating cavity of the seat body and extends along the height direction of the seat body.

6. The radio frequency instrument according to claim 5, characterized in that: The second connecting portion extends along the height direction of the seat body to the top surface of the seat body and forms an opening on the top surface of the seat body; the first connecting portion can be inserted into the second connecting portion along the top opening of the second connecting portion; A first magnetic component is provided on the bottom surface of the accommodating cavity of the seat body, and a second magnetic component matching the first magnetic component is provided on the radio frequency part, and the first magnetic component and the second magnetic component are magnetically adsorbed.

7. The radio frequency instrument according to claim 1, characterized in that: Both the first connecting part and the second connecting part are magnets; there are multiple first connecting parts and multiple second connecting parts, multiple first connecting parts are arranged on the periphery of the RF part, and multiple second connecting parts are arranged on the periphery of the accommodating cavity of the seat body, so that the comb tooth seat is magnetically fixed on the RF body.

8. The radio frequency instrument according to claim 1, characterized in that: The seat body includes a bottom plate and a side surround, wherein the side surround is arranged at the outer edge of the bottom plate, and the side surround and the bottom plate enclose the accommodating cavity, and the comb-tooth electrode is fixed on a side of the bottom plate away from the side surround.

9. The radio frequency instrument according to claim 8, characterized in that: The bottom plate is an arc-shaped plate, and the height of the side panels gradually decreases along the length direction of the bottom plate.

10. The radio frequency instrument according to claim 1, characterized in that: The RF part is provided with a RF electrode, which is arranged on a side of the RF part facing the comb tooth seat. When the RF part is accommodated in the accommodating cavity of the comb tooth seat, the RF electrode is electrically connected to the comb tooth electrode.

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