Ultrasonic beautifying device

Abstract

The utility model discloses an ultrasonic beautifying device. The ultrasonic beautifying device comprises an ultrasonic transducer, a first circuit board and a push-pull circuit, the first circuit board is provided with a containing space, the push-pull circuit comprises a planar transformer and a main circuit arranged on the first circuit board, at least part of the planar transformer is located in the containing space, and the input end of the main circuit is used for being electrically connected with a direct-current power source. The output end of the main circuit is used for being electrically connected with the ultrasonic transducer, the planar transformer is electrically connected between the input end and the output end of the main circuit, and the push-pull circuit is used for converting direct current into alternating current and outputting the alternating current to the ultrasonic transducer through the output end. According to the ultrasonic beautifying device, the occupied space of the planar transformer and the first circuit board can be reduced, and the size miniaturization of the ultrasonic beautifying device is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of ultrasonic beauty equipment, and in particular to an ultrasonic beauty device. Background Art

[0002] Ultrasonic beauty devices can be used to improve the condition of human skin. As people's demand for skin improvement increases, more and more types of ultrasonic beauty devices are appearing on the market.

[0003] Ultrasound beauty treatments, such as microfocused ultrasound (MFU) technology, are a common skin care method in the medical aesthetics industry. During skin care, the ultrasonic transducer within the device generates focused ultrasound energy, creating a focal point beneath the skin. This creates a skin treatment point, offering anti-aging and lifting benefits.

[0004] In the related art, a driving circuit is required to drive the ultrasonic transducer. However, the driving circuit in the related art occupies a large space, which is not conducive to the miniaturization of the ultrasonic beauty device. Summary of the Invention

[0005] An embodiment of the present application provides an ultrasonic cosmetic device, which aims to reduce the size of the ultrasonic cosmetic device.

[0006] The present invention provides an ultrasonic cosmetic device, comprising:

[0007] Ultrasonic transducer;

[0008] a first circuit board, wherein the first circuit board is provided with a receiving space;

[0009] A push-pull circuit includes a planar transformer and a main circuit provided on the first circuit board, wherein the planar transformer is at least partially located within the accommodating space, the input end of the main circuit is used to be electrically connected to a DC power supply, and the output end of the main circuit is used to be electrically connected to the ultrasonic transducer, the planar transformer is electrically connected between the input end and the output end of the main circuit, and the push-pull circuit is used to convert DC power into AC power and output it to the ultrasonic transducer through the output end.

[0010] In one embodiment, the accommodation space includes a through hole formed in the first circuit board and penetrating the first circuit board, and the planar transformer is at least partially located in the through hole; and / or,

[0011] The planar transformer comprises a first side wall and a second side wall arranged opposite to each other, wherein the first side wall and the second side wall are respectively located on two sides of the first circuit board; and / or,

[0012] The planar transformer is mounted on the first circuit board.

[0013] In one embodiment, the planar transformer includes a third circuit board, a coil provided on the third circuit board, and a magnetic core provided on the third circuit board. The third circuit board is mounted on the first circuit board, and at least a portion of the magnetic core is located in the through hole.

[0014] In one embodiment, the length direction of the third circuit board is consistent with the length direction of the first circuit board; and / or,

[0015] Both ends of the third circuit board protrude from both ends of the magnetic core, and both ends of the third circuit board are respectively mounted on the first circuit board; and / or,

[0016] The third circuit board is welded to the first circuit board so that the third circuit board is mounted on the first circuit board, and the planar transformer is electrically connected between the input terminal and the output terminal of the main circuit; and / or,

[0017] The magnetic core includes an E-shaped first magnetic core and a flat second magnetic core, the first magnetic core and the second magnetic core are respectively arranged on both sides of the third circuit board, the second magnetic core is arranged in the through hole, and the side of the second magnetic core away from the third circuit board protrudes from the first circuit board; or, the first magnetic core is arranged in the through hole, and the side of the first magnetic core away from the third circuit board protrudes from the first circuit board.

[0018] In one embodiment, the main circuit includes a control signal conversion unit and a driving part, the control signal conversion unit is used to output a first frequency signal and a second frequency signal with complementary frequencies, the driving part is connected to the control signal conversion unit, and the driving part is used to drive the planar transformer to output alternating current according to the first frequency signal and the second frequency signal, and the control signal conversion unit and the driving part are arranged on the side of the planar transformer on the first circuit board away from the ultrasonic transducer.

[0019] In one embodiment, the driving part includes a driving unit, a first driving branch and a second driving branch, wherein:

[0020] The driving unit is connected to the control signal conversion unit, and is configured to output a first driving signal and a second driving signal according to the first frequency signal and the second frequency signal, wherein the first driving signal and the second driving signal have complementary frequencies;

[0021] The input end of the first driving branch is connected to the first output end of the driving unit, the output end of the first driving branch is connected to the first primary end of the planar transformer, the input end of the second driving branch is connected to the second output end of the driving unit, the output end of the second driving branch is connected to the second primary end of the planar transformer, and the first secondary end of the planar transformer and the second secondary end of the planar transformer are commonly connected to the ultrasonic transducer;

[0022] The first driving branch and the second driving branch are both arranged between the driving unit and the planar transformer.

[0023] In one embodiment, the first circuit board is provided with an electrical output terminal, the electrical output terminal is connected to the ultrasonic transducer, and the control signal conversion unit, the driving part, the planar transformer and the electrical output terminal are distributed in sequence along the length direction of the first circuit board.

[0024] In one embodiment, the ultrasonic cosmetic device further includes an isolation cover, and the isolation cover is disposed on the push-pull circuit.

[0025] In one embodiment, the isolation cover includes a first isolation cover and a second isolation cover, the first isolation cover is provided to cover the control signal conversion unit, and the second isolation cover is provided to cover the driving part and the planar transformer.

[0026] In one embodiment, the main circuit further includes a matching unit, wherein the matching unit is coupled between the secondary side of the planar transformer and the ultrasonic transducer, and the matching unit is provided on a side of the planar transformer on the first circuit board close to the ultrasonic transducer; and / or,

[0027] The ultrasonic cosmetic device further includes a handheld housing, wherein a length direction of the handheld housing is consistent with a length direction of the first circuit board, and the first circuit board and the planar transformer are arranged in the handheld housing; and / or,

[0028] The third circuit board is provided with a second inductor, the second inductor is connected to the center connection of the planar transformer and the ground, and the second inductor is located on a side of the planar transformer away from the ultrasonic transducer; and / or,

[0029] The ultrasonic cosmetic device further includes a second circuit board. The first circuit board and the second circuit board are stacked. A gap is provided between the first circuit board and the second circuit board. The planar transformer is at least partially located in the gap.

[0030] In one embodiment, the ultrasonic cosmetic device further includes a handheld housing and a dielectric housing, wherein the dielectric housing is at least partially disposed within the handheld housing. The dielectric housing, or between the dielectric housing and the handheld housing, forms a dielectric chamber for storing an ultrasonic energy conducting medium. The handheld housing is provided with a sound output region corresponding to the dielectric chamber. The ultrasonic transducer is disposed within the dielectric chamber, and the ultrasonic energy focus of the ultrasonic transducer passes through the sound output region for emission into the skin to be treated.

[0031] The first circuit board and the planar transformer are arranged in the handheld housing, and the first circuit board and the planar transformer are located on a side of the dielectric chamber away from the sound output area; the length direction of the handheld housing is consistent with the length direction of the first circuit board.

[0032] In one embodiment, the ultrasonic beauty device further includes a driving component, which is disposed in the handheld housing and located between the medium chamber and the first circuit board, and is used to drive the ultrasonic transducer to move in the medium chamber.

[0033] In one embodiment, the ratio of the length of the portion of the first end of the third circuit board protruding from the magnetic core to the length of the magnetic core is 0.3-0.65; and / or,

[0034] The length of the portion of the first end of the third circuit board protruding from the magnetic core is 0.5 cm to 1.6 cm; and / or,

[0035] The third circuit board is welded to the first circuit board at edges at both ends of the third circuit board; and / or,

[0036] The ratio of the length of the portion of the second end of the third circuit board protruding from the magnetic core to the length of the magnetic core is 0.3-0.65; and / or,

[0037] The length of the portion of the second end of the third circuit board protruding from the magnetic core is 0.5 cm to 1.6 cm.

[0038] In an embodiment of the present application, a push-pull circuit converts direct current into alternating current and outputs it to the ultrasonic transducer, enabling the ultrasonic transducer to operate normally and emit ultrasonic energy, enabling the ultrasonic beauty device to provide beauty treatments for the user. This application utilizes a planar transformer to form the push-pull circuit. Due to the small size of the planar transformer, the space occupied by the push-pull circuit can be effectively reduced. Furthermore, placing at least a portion of the planar transformer within the accommodation space of the first circuit board can reduce the space occupied by the planar transformer and the first circuit board, facilitating miniaturization of the ultrasonic beauty device. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and beneficial effects of the present application apparent.

[0040] Figure 1 This is a schematic structural diagram of an ultrasonic cosmetic device provided in an embodiment of the present application;

[0041] Figure 2 This is one of the partial structural schematic diagrams of an ultrasonic cosmetic device provided in an embodiment of the present application.

[0042] Figure 3 This is a partial structural diagram of an ultrasonic cosmetic device provided in an embodiment of the present application, in which the planar transformer is not shown.

[0043] Figure 4 This is a second schematic diagram of a partial structure of an ultrasonic cosmetic device provided in an embodiment of the present application;

[0044] Figure 5 This is a structural block diagram of an ultrasonic cosmetic device provided in an embodiment of the present application;

[0045] Figure 6 This is a circuit diagram of an ultrasonic cosmetic device provided in an embodiment of the present application.

[0046] Figure 7 A cross-sectional view of a partial structure of an ultrasonic cosmetic device provided in an embodiment of the present application;

[0047] Figure 8 This is a cross-sectional view of a partial structure of an ultrasonic cosmetic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0049] The following combination Figures 1 to 8 The ultrasonic cosmetic device of the present application is described.

[0050] like Figure 1 、 Figure 2 and Figure 3The ultrasonic beauty device includes an ultrasonic transducer 1, a first circuit board 2 and a push-pull circuit 3. The first circuit board 2 is provided with a receiving space 21. The push-pull circuit 3 includes a planar transformer 31 and a main circuit provided on the first circuit board 2. The planar transformer 31 is at least partially located in the receiving space 21. The input end of the main circuit is used to be electrically connected to a DC power supply, and the output end of the main circuit is used to be electrically connected to the ultrasonic transducer 1. The planar transformer 31 is electrically connected between the input end and the output end of the main circuit. The push-pull circuit 3 is used to convert DC power into AC power and output it to the ultrasonic transducer 1 through the output end.

[0051] It can be understood that the main circuit is the circuit portion of the push-pull circuit 3 provided on the first circuit board 2 , and is named in order to distinguish it from the circuit portion provided outside the first circuit board 2 (such as the planar transformer 31 ).

[0052] It is understood that the push-pull circuit 3 converts direct current into alternating current and outputs it to the ultrasonic transducer 1, allowing the ultrasonic transducer 1 to operate normally and emit ultrasonic energy, so that the ultrasonic energy focus of the ultrasonic transducer 1 can be emitted into the skin, allowing the ultrasonic beauty device to achieve beauty effects on the user. The present application uses a planar transformer 31 to form the push-pull circuit 3. Since the planar transformer 31 is arranged in a planar shape and has a small size, it can effectively reduce the space occupied by the push-pull circuit 3. At the same time, the planar transformer 31 is at least partially disposed within the accommodation space 21 of the first circuit board 2, which can reduce the space occupied by the planar transformer 31 and the first circuit board 2, thereby facilitating the miniaturization of the ultrasonic beauty device.

[0053] By providing an accommodating space 21 for accommodating the planar transformer 31 on the first circuit board 2, the space occupied by the first circuit board 2 can be reused, which can effectively reduce the space occupied by the first circuit board 2 and the planar transformer 31, and is conducive to the miniaturization of the ultrasonic beauty device.

[0054] Some transformers in related art, such as power transformers, are larger than planar transformer 31. The present application employs planar transformer 31 as part of push-pull circuit 3, effectively reducing the space occupied by push-pull circuit 3. Furthermore, planar transformer 31 has a flatter structure, meaning it is inherently thinner and lighter, facilitating the thinning and lightweight nature of push-pull circuit 3, thereby enabling an even thinner ultrasonic cosmetic device.

[0055] In some examples, the planar transformer 31 is mounted on the first circuit board 2 so that the first circuit board 2 is connected to the push-pull circuit 3. This not only facilitates fixing the planar transformer but also facilitates electrical connection between the planar transformer 31 and the main circuit.

[0056] For example, the partial structure of the planar transformer 31 is laminated to the first circuit board 2, and the partial structure is connected to the first circuit board 2 by using a connecting component, so that the planar transformer 31 is connected to the first circuit board 2.

[0057] For example, the partial structure of the planar transformer 31 is laminated to the first circuit board 2, and the partial structure is connected to the first circuit board 2 by using a connecting component, so that the planar transformer 31 is connected to the first circuit board 2. For example, the circuit board of the planar transformer 31 is located in the accommodating space 21, and the circuit board of the planar transformer 31 and the first circuit board 2 are connected by using a connecting wire or welding, so that the planar transformer 31 is connected to the first circuit board 2 in structure and circuit.

[0058] In some embodiments, as shown in Figure 2 and Figure 3 The accommodating space 21 includes a through hole 211 formed in the first circuit board 2 and penetrating through the first circuit board 2, and the planar transformer 31 is at least partially located in the through hole 211.

[0059] It can be understood that the accommodating space 21 penetrates through the first circuit board 2, so as to ensure the accommodating capacity of the accommodating space 21, so that the accommodating space 21 formed in the first circuit board 2 can effectively accommodate the planar transformer 31, so as to fully utilize the space of the first circuit board 2 and reduce the occupied space of the planar transformer 31 and the first circuit board 2.

[0060] In other embodiments, the accommodating space 21 can also include a recess formed in the first circuit board 2, and the planar transformer 31 is at least partially located in the recess. It can be understood that the planar transformer 31 is arranged in the recess, so as to realize the sunken design of the planar transformer 31, and effectively reduce the occupied space of the planar transformer 31 and the first circuit board 2.

[0061] In some embodiments, as shown in Figure 2 The planar transformer 31 includes a third circuit board 311, a coil 313 arranged on the third circuit board 311, and a magnetic core 312 arranged on the third circuit board 311, the third circuit board 311 is mounted on the first circuit board 2, and at least part of the magnetic core 312 is located in the through hole 211.

[0062] It can be understood that the magnetic core 312 cooperates with the coil 313 arranged on the third circuit board 311 to form a planar transformer 31. Compared with the third circuit board 311, the volume of the magnetic core 312 is larger, so at least part of the magnetic core 312 is arranged in the through hole 211, and then the at least part of the magnetic core 312 can be accommodated in the accommodation space 21 of the first circuit board 2, so that the occupation space of the magnetic core 312 and the first circuit board 2 can be reduced, and the occupation space of the planar transformer 31 and the first circuit board 2 can be reduced.

[0063] In some examples, the third circuit board 311 is electrically connected to the first circuit board 2, so that the planar transformer 31 is electrically connected between the input end and the output end of the main circuit.

[0064] For example, the planar transformer 31 can be mounted on the first circuit board 2. For example, as shown in Figure 2 and 3 shown, the third circuit board 311 can be laminated on the first circuit board 2, and the first circuit board 2 and the third circuit board 311 can be connected by welding, so that the first circuit board 2 and the third circuit board 311 can realize the connection of structure and circuit at the same time.

[0065] For example, as shown in Figure 8 , the third circuit board 311 can also be arranged in the through hole 211, and the first circuit board 2 and the third circuit board 311 can be connected by connecting wires or welding, so that the first circuit board 2 and the third circuit board 311 can realize the connection of structure and circuit.

[0066] In some examples, the length direction of the third circuit board 311 is consistent with the length direction of the first circuit board 2. It can be understood that on the one hand, the length of the third circuit board can be increased to increase the coil 313, and on the other hand, the planar transformer 31 is arranged on the first circuit board 2 and / or at least part of the planar transformer 31 is located in the accommodation space 21 of the first circuit board 2, so that the length direction of the third circuit board 311 is consistent with the length direction of the first circuit board 2, which can avoid the third circuit board 311 protruding from the first circuit board 2, and can reduce the occupation space of the planar transformer 31 and the first circuit board 2.

[0067] In some examples, both ends of the third circuit board 311 protrude from both ends of the magnetic core 312, so that the third circuit board 311 has enough space to arrange the magnetic core 312, the magnetic core 312 can be stably arranged on the third circuit board 311, and it is ensured that the third circuit board 311 at least partially protrudes from the magnetic core 312, that is, at least part of the third circuit board 311 is not covered by the magnetic core 312, so as to facilitate the arrangement of the coil 313 and other circuit structures on the third circuit board 311, and facilitate the installation of the third circuit board 311 on the first circuit board 2.

[0068] The two ends of the third circuit board 311 are respectively mounted on the first circuit board 2, realizing the mounting connection of the planar transformer 31 and the first circuit board 2, and avoiding the third circuit board 311 protruding from the first circuit board 2, so as to reduce the occupied space of the planar transformer 31 and the first circuit board 2.

[0069] For example, the ratio of the length of the part of the third circuit board 311 protruding from the magnetic core 312 to the length of the magnetic core 312 is 0.3-0.65, which not only enables the third circuit board 311 to have sufficient space for mounting the magnetic core 312, ensures that the magnetic core 312 can be stably arranged on the third circuit board 311, and the third circuit board 311 has sufficient space for arranging the coil 313 and other circuit structures, but also facilitates the mounting of the third circuit board 311 on the first circuit board 2, and improves the assembly convenience.

[0070] It can be understood that when the ratio is less than 0.3, the length of the part of the third circuit board 311 protruding from the magnetic core 312 is insufficient, which may on the one hand make it difficult to arrange the coil 313 and other circuit structures, and on the other hand make it difficult to position and fix the third circuit board 311 on the first circuit board 2, and the connection stability is also weak; when the ratio is greater than 0.65, the length of the part of the third circuit board 311 protruding from the magnetic core 312 is too long, which may on the one hand result in poor structural stability of the planar transformer 31, and on the other hand is not conducive to miniaturization design in the length direction, such as the third circuit board 311 may cover too much area of the first circuit board 2, thereby affecting the arrangement of other circuits on the first circuit board 2.

[0071] For example, the ratio of the length of the part of the third circuit board 311 protruding from the magnetic core 312 to the length of the magnetic core 312 is 0.3 or 0.35 or 0.4 or 0.5 or 0.6.

[0072] Further, the ratio of the length of the part of the third circuit board 311 protruding from the magnetic core 312 to the length of the magnetic core 312 is 0.3-0.65, which not only enables the third circuit board 311 to have sufficient space for mounting the magnetic core 312, ensures that the magnetic core 312 can be stably arranged on the third circuit board 311, and the third circuit board 311 has sufficient space for arranging the coil 313 and other circuit structures, but also facilitates the mounting of the third circuit board 311 on the first circuit board 2, and improves the assembly convenience.

[0073] It can be understood that when the aforementioned ratio is less than 0.3, the length of the portion of the third circuit board 311 protruding from the magnetic core 312 will be insufficient. On the one hand, it may be difficult to arrange the coil 313 and other circuit structures. On the other hand, it will also make the third circuit board 311 difficult to position and fix with the first circuit board 2, and the connection stability will also be weak; when the aforementioned ratio is greater than 0.65, the length of the portion of the third circuit board 311 protruding from the magnetic core 312 will be too long. On the one hand, it may lead to poor structural stability of the planar transformer 31. On the other hand, it is not conducive to miniaturization design in the length direction. For example, the third circuit board 311 may cover too much area of ​​the first circuit board 2, thereby affecting the arrangement of other circuits on the first circuit board 2.

[0074] Exemplarily, for example, the ratio of the length of the portion of the second end of the third circuit board 311 protruding from the magnetic core 312 to the length of the magnetic core 312 is 0.3 or 0.35 or 0.4 or 0.5 or 0.6.

[0075] Furthermore, the length of the part of the first end of the third circuit board 311 protruding from the magnetic core 312 is 0.5 cm to 1.6 cm, which not only allows the third circuit board 311 to have sufficient space for installing the magnetic core 312, ensuring that the magnetic core 312 can be stably set on the third circuit board 311, and the third circuit board 311 has sufficient space to arrange the coil 313 and other circuit structures, but also facilitates the installation of the third circuit board 311 on the first circuit board 2, thereby improving assembly convenience.

[0076] It can be understood that when the length of the part of the first end of the third circuit board 311 protruding from the magnetic core 312 is less than 0.5 cm, the length of the part of the third circuit board 311 protruding from the magnetic core 312 will be insufficient. On the one hand, it may be difficult to arrange the coil 313 and other circuit structures. On the other hand, it will also make the third circuit board 311 difficult to position and fix with the first circuit board 2, and the connection stability will also be weak; when the length of the part of the first end of the third circuit board 311 protruding from the magnetic core 312 is greater than 1.6 cm, the length of the part of the third circuit board 311 protruding from the magnetic core 312 will be too long. On the one hand, it may cause the structural stability of the planar transformer 31 to be poor. On the other hand, it is not conducive to miniaturization design in the length direction. For example, the third circuit board 311 may cover too much area of ​​the first circuit board 2, thereby affecting the arrangement of other circuits on the first circuit board 2.

[0077] Optionally, for example, the length of the portion of the first end of the third circuit board 311 protruding from the magnetic core 312 is 0.5 cm, 0.6 cm, 0.8 cm, 1 cm, 1.2 cm, 1.4 cm, or 1.6 cm.

[0078] The length of the part of the second end of the third circuit board 311 protruding from the magnetic core 312 is 0.5 cm to 1.6 cm, which not only allows the third circuit board 311 to have sufficient space for installing the magnetic core 312, ensuring that the magnetic core 312 can be stably set on the third circuit board 311, but also ensures that the third circuit board 311 has sufficient space to arrange the coil 313 and other circuit structures.

[0079] It can be understood that when the length of the part of the second end of the third circuit board 311 protruding from the magnetic core 312 is less than 0.5 cm, the length of the part of the third circuit board 311 protruding from the magnetic core 312 will be insufficient. On the one hand, it may be difficult to arrange the coil 313 and other circuit structures. On the other hand, it will also make the third circuit board 311 difficult to position and fix with the first circuit board 2, and the connection stability will also be weak; when the length of the part of the second end of the third circuit board 311 protruding from the magnetic core 312 is greater than 1.6 cm, the length of the part of the third circuit board 311 protruding from the magnetic core 312 will be too long. On the one hand, it may cause the structural stability of the planar transformer 31 to be poor. On the other hand, it is not conducive to miniaturization design in the length direction. For example, the third circuit board 311 may cover too much area of ​​the first circuit board 2, thereby affecting the arrangement of other circuits on the first circuit board 2.

[0080] Optionally, for example, the length of the portion of the second end of the third circuit board 311 protruding from the magnetic core 312 is 0.5 cm, 0.6 cm, 0.8 cm, 1 cm, 1.2 cm, 1.4 cm, or 1.6 cm.

[0081] In some examples, the third circuit board 311 is welded to the first circuit board 2, so that the third circuit board 311 is mounted on the first circuit board 2, and the planar transformer 31 is electrically connected between the input and output terminals of the main circuit. It will be understood that by welding the first circuit board 2 and the third circuit board 311 together, the third circuit board 311 is mounted on the first circuit board 2, and the third circuit board 311 is structurally fixedly connected to the first circuit board 2, while the welding also electrically connects the first circuit board 2 and the third circuit board 311, thereby ensuring circuit connectivity between the first circuit board 2 and the third circuit board 311.

[0082] For example, Figure 2 As shown, the third circuit board 311 is welded to the first circuit board 2 at the edges of both ends of the third circuit board 311, so that the welding connection position 314 between the third circuit board 311 and the first circuit board 2 is at the edge of the third circuit board 311, which facilitates the welding connection between the third circuit board 311 and the first circuit board 2.

[0083] In some embodiments, the planar transformer 31 includes a first side wall and a second side wall that are opposite to each other, and the first side wall and the second side wall are respectively located on two sides of the first circuit board 2 .

[0084] It can be understood that the two oppositely arranged side walls of the planar transformer 31 are respectively arranged on both sides of the first circuit board 2, so that part of the structure of the planar transformer 31 is located on one side of the first circuit board 2, and the other part of the structure of the planar transformer 31 is located on the other side of the first circuit board 2, which reduces the height of the planar transformer 31 protruding from the first circuit board 2 and can reduce the space occupied by the planar transformer 31 and the first circuit board 2.

[0085] Exemplarily, the first side wall of the planar transformer 31 is located on one side of the first circuit board 2 , and the second side wall of the planar transformer 31 passes through the through hole 211 and is located on the other side of the first circuit board 2 .

[0086] In some examples, such as Figure 2 and Figure 7 The magnetic core 312 includes an E-shaped first magnetic core 3121 and a flat second magnetic core 3122. The first magnetic core 3121 and the second magnetic core 3122 are respectively arranged on both sides of the third circuit board 311, and the second magnetic core 3122 is arranged in the through hole 211. The side of the second magnetic core 3122 away from the third circuit board 311 (i.e., the second side wall) protrudes from the first circuit board 2; or, the first magnetic core 3121 is arranged in the through hole 211, and the side of the first magnetic core 3121 away from the third circuit board 311 (i.e., the second side wall) protrudes from the first circuit board 2.

[0087] It can be understood that the first magnetic core 3121 is E-shaped and its volume is generally larger than that of the second magnetic core 3122. If at least a portion of the first magnetic core 3121 is disposed in the through hole 211, the space of the first circuit board 2 can be utilized to accommodate at least a portion of the first magnetic core 3121, thereby reducing the occupied space of the first magnetic core 3121 and the first circuit board 2, thereby reducing the occupied space of the planar transformer 31 and the first circuit board 2, and also helping to reduce the side of the second magnetic core 3122 away from the third circuit board 311 (such as Figure 7 The lower side of the first circuit board 2 shown in the figure) protrudes above the height of the first circuit board 2 to facilitate the arrangement of other structures, such as the arrangement of the second circuit board 5 described below.

[0088] If at least a portion of the second magnetic core 3122 is disposed in the through hole 211, the space of the first circuit board 2 can be utilized to accommodate at least a portion of the second magnetic core 3122, thereby reducing the space occupied by the second magnetic core 3122 and the first circuit board 2, thereby reducing the space occupied by the planar transformer 31 and the first circuit board 2, and also helping to reduce the side of the second magnetic core 3122 that is away from the third circuit board 311 (such as Figure 7 The first circuit board 2 shown in the figure) protrudes from the height of the first circuit board 2 to facilitate the arrangement of other structures, such as Figure 1 The fan 10 in the.

[0089] The above can be selected according to actual needs in actual design.

[0090] In one embodiment of the present application, Figure 2 and Figure 5 The main circuit includes a control signal conversion unit 32 and a driving part 33. The control signal conversion unit 32 is used to output a first frequency signal and a second frequency signal with complementary frequencies. The driving part 33 is connected to the control signal conversion unit 32. The driving part 33 is used to drive the planar transformer 31 to output alternating current according to the first frequency signal and the second frequency signal. The control signal conversion unit 32 and the driving part 33 are arranged on the side of the planar transformer 31 on the first circuit board 2 away from the ultrasonic transducer 1.

[0091] It is understood that the control signal conversion unit 32 is used to connect to the control unit. The control unit is used to output the drive control signal, and the control unit can be set on the second circuit board 5 described below. The control signal conversion unit 32 is used to output a first frequency signal and a second frequency signal with complementary frequencies based on the drive control signal. The driving part 33 is connected to the control signal conversion unit 32. The driving part 33 is used to drive the planar transformer 31 to output alternating current based on the first frequency signal and the second frequency signal. The ultrasonic transducer 1 is connected to the planar transformer 31. The ultrasonic transducer 1 is used to operate based on the alternating current and output ultrasonic energy.

[0092] When the ultrasonic beauty device is working, the electrical signal is transmitted in sequence along the control signal conversion unit 32, the driving part 33, the planar transformer 31 and the ultrasonic transducer 1, that is, the control signal conversion unit 32, the driving part 33, the planar transformer 31 and the ultrasonic transducer 1 are connected in sequence, and the control signal conversion unit 32 and the driving part 33 are arranged on the side of the planar transformer 31 away from the ultrasonic transducer 1, which facilitates the sequential connection of the control signal conversion unit 32, the driving part 33, the planar transformer 31 and the ultrasonic transducer 1. The length of the connecting wire used to connect the control signal conversion unit 32, the driving part 33, the planar transformer 31 and the ultrasonic transducer 1 can be shortened, mutual interference of signals can be avoided, and the circuit layout can be facilitated.

[0093] In a specific implementation, the control unit can specifically be a control circuit built based on a processor. Accordingly, the control signal conversion unit 32 can specifically include two frequency division branches for outputting frequency-complementary electrical signals according to the drive control signal, that is, outputting a first frequency signal and a second frequency signal with complementary frequencies. Here, frequency complementarity means that within a unit period, the level of the first frequency signal and the level of the second frequency signal are opposite to each other. For example, within a unit period, when the first frequency signal is at a high level, the second frequency signal is at a low level. For another example, within a unit period, when the first frequency signal is at a low level, the second frequency signal is at a high level.

[0094] Exemplarily, the driving portion 33 is located between the control signal conversion unit 32 and the planar transformer 31 .

[0095] Optionally, the first circuit board 2 is provided with an electrical output terminal 22, which is connected to the ultrasonic transducer 1. The control signal conversion unit 32, the driving portion 33, the planar transformer 31, and the electrical output terminal 22 are sequentially distributed along the length of the first circuit board 2. It is understandable that the electrical signal will be transmitted sequentially along the control signal conversion unit 32, the driving portion 33, the planar transformer 31, the electrical output terminal 22, and the ultrasonic transducer 1. Therefore, by sequentially arranging the control signal conversion unit 32, the driving portion 33, the planar transformer 31, and the electrical output terminal 22 along the first circuit board 2, the length of the connecting wires used to connect the control signal conversion unit 32, the driving portion 33, the planar transformer 31, and the electrical output terminal 22 can be shortened, mutual signal interference can be avoided, and circuit layout can be facilitated.

[0096] In some examples, such as Figure 2 and Figure 5 The control signal conversion unit 32 includes a high-frequency signal generating unit 321 and a logic unit 322. Specifically:

[0097] The high-frequency signal generating unit 321 is configured to generate a high-frequency signal according to the driving control signal. The logic unit 322 is connected to the high-frequency signal generating unit and is configured to convert the high-frequency signal into a first frequency signal and a second frequency signal having complementary frequencies.

[0098] In a specific implementation, the high-frequency signal generating unit 321 can communicate with the control unit via I2C, that is, receive the drive control signal output by the control unit. The drive control signal may include a clock portion and a data portion. The high-frequency signal generating unit 321 can output a high-frequency signal based on the clock portion and the data portion. Based on this, in actual implementation, the control unit can configure the clock portion and the data portion of the initial control signal to adjust the frequency, amplitude, etc. of the high-frequency signal.

[0099] As an example, the high-frequency signal generating unit 321 may specifically include a clock crystal oscillator 3211 and a frequency synthesizer. The clock crystal oscillator 3211 may generate a 25 MHz frequency signal and output this frequency signal to the frequency synthesizer. In other words, the clock crystal oscillator 3211 serves as the high-frequency signal source for the frequency synthesizer. For example, the frequency synthesizer outputs a 4 MHz high-frequency signal based on the drive control signal and the 25 MHz frequency signal.

[0100] In this embodiment, the logic unit 322 may be implemented using a logic gate circuit. For example, the logic gate circuit includes at least two signal output branches, one of which is used to flip the level of the high-frequency signal and to make the output frequencies of the two signal output branches the same, thereby outputting a first frequency signal and a second frequency signal having complementary frequencies.

[0101] Alternatively, as Figure 2 and Figure 6 The driving part 33 includes a driving unit 331, a first driving branch 332 and a second driving branch 333, wherein:

[0102] The driving unit 331 is connected to the control signal conversion unit 32, and is used to output a first driving signal and a second driving signal according to the first frequency signal and the second frequency signal, wherein the frequencies of the first driving signal and the second driving signal are complementary;

[0103] An input end of the first driving branch 332 is connected to a first output end of the driving unit 331, an output end of the first driving branch 332 is connected to a first primary end of the planar transformer 31, an input end of the second driving branch 333 is connected to a second output end of the driving unit 331, an output end of the second driving branch 333 is connected to a second primary end of the planar transformer 31, and a first secondary end of the planar transformer 31 and a second secondary end of the planar transformer 31 are both connected to the ultrasonic transducer 1;

[0104] The first driving branch 332 and the second driving branch 333 are both provided between the driving unit 331 and the planar transformer 31 .

[0105] The electrical signal is transmitted along the direction of the driving unit 331, the first driving branch 332 and the planar transformer 31 or the direction of the driving unit 331, the second driving branch 333 and the planar transformer 31. Further, the first driving branch 332 and the second driving branch 333 are both arranged between the driving unit 331 and the planar transformer 31, facilitating the sequential connection of the driving unit 331, the first driving branch 332 and the planar transformer 31, facilitating the sequential connection of the driving unit 331, the second driving branch 333 and the planar transformer 31, shortening the length of the connection line used for the sequential connection of the driving unit 331, the first driving branch 332 and the planar transformer 31, and shortening the length of the connection line used for the sequential connection of the driving unit 331, the second driving branch 333 and the planar transformer 31.

[0106] In some examples, as Figure 6 , the driving unit 331 is configured with a first input end IN1, a second input end IN2, a first output end OUT1 and a second output end OUT2, and the first input end IN1 and the second input end IN2 are respectively connected with the control signal conversion unit 32.

[0107] The input end of the first driving branch 332 is connected with the first output end OUT1 as a first controlled end, and the output end of the first driving branch 332 is connected with the first primary end of the planar transformer 31T1. The input end of the second driving branch 333 is connected with the second output end OUT2 as a second controlled end, and the output end of the second driving branch 333 is connected with the second primary end of the planar transformer 31T1. The first secondary end of the planar transformer 31T1 is a first output end, and the second secondary end of the planar transformer 31T1 is a second output end.

[0108] Here, the driving unit 331 outputs a first frequency signal to the first controlled end through the first output end OUT1 and outputs a second frequency signal to the second controlled end through the second output end OUT2. Based on this, the alternating conduction control of the first driving branch 332 and the second driving branch 333 can be realized, and the primary side of the planar transformer 31T1 alternately generates currents with opposite directions, so as to output corresponding alternating currents through the secondary side of the planar transformer 31T1.

[0109] Optionally, as Figure 2 , the main circuit further includes a matching unit 34, the matching unit 34 is coupled between the secondary side of the planar transformer 31 and the ultrasonic transducer 1, and the matching unit 34 is arranged on the side of the planar transformer 31 close to the ultrasonic transducer 1 on the first circuit board 2.

[0110] It can be understood that the electrical signal is transmitted in sequence along the planar transformer 31, the matching unit 34 and the ultrasonic transducer 1, and then the matching unit 34 is coupled between the secondary side of the planar transformer 31 and the ultrasonic transducer 1, which facilitates the sequential connection of the planar transformer 31, the matching unit 34 and the ultrasonic transducer 1, and can shorten the length of the connecting wire used to connect the planar transformer 31, the matching unit 34 and the ultrasonic transducer 1 in sequence.

[0111] Specifically, such as Figure 6 The first driving branch 332 includes: a first switch Q1, a first capacitor C1, and a first resistor R1. The second driving branch includes: a second switch Q2, a second capacitor C2, and a second resistor R2.

[0112] The controlled terminal of the first switch Q1 serves as the input terminal of the first driving branch 332. The high-potential terminal of the first switch Q1 is connected to the first capacitor C1, forming a first node P1. The first node P1 serves as the output terminal of the first driving branch. The second terminal of the first capacitor C1 is connected to the first terminal of the first resistor R1. The second terminal of the first resistor R1 and the low-potential terminal of the first switch Q1 are grounded. The controlled terminal of the second switch Q2 serves as the input terminal of the second driving branch 333. The high-potential terminal of the second switch Q2 is connected to the second capacitor C2, forming a second node P2. The second node P2 serves as the output terminal of the second driving branch 333. The second terminal of the second capacitor C2 is connected to the first terminal of the second resistor R2. The second terminal of the second resistor R2 and the low-potential terminal of the second switch Q2 are grounded.

[0113] The matching unit 34 includes: a first inductor L1 ( Figure 3 The first end of the first inductor L1 serves as the first end of the matching unit 34, connected to the first secondary terminal of the planar transformer T1. The second end of the first inductor L1 is connected to the first end of the third capacitor C3, forming a third node P3. The second end of the third capacitor C3 serves as the second end of the matching unit 34, connected to the second secondary terminal of the planar transformer T1, forming a fourth node P4. The first end of the ultrasonic transducer 1H1 is connected to the third node P3, and the second end of the ultrasonic transducer 1H1 is connected to the fourth node P4.

[0114] Optional, such as Figure 6 , the third circuit board 311 is provided with a second inductor L2 ( Figure 2The second inductor L2 is connected to the center connection of the planar transformer T1, and the second inductor L2 is located on the side of the planar transformer T1 away from the ultrasonic transducer 1. The sampling unit is connected to one end of the second inductor L2, and the other end of the second inductor L2 is connected to the center connection of the planar transformer T1, so that the electrical signal sampling of the primary side of the planar transformer 31 can be realized. Moreover, the blank space on the third circuit board 311 can be utilized to save the space on the first circuit board 2.

[0115] In some embodiments, as Figure 2 and Figure 7 The ultrasonic cosmetic device further comprises an isolation cover 4, and the isolation cover 4 covers the push-pull circuit 3.

[0116] It can be understood that the isolation cover 4 can separate the push-pull circuit 3 from other electronic components of the ultrasonic cosmetic device, so as to avoid mutual interference between the push-pull circuit 3 and the other electronic components, and ensure that the ultrasonic cosmetic device can work normally.

[0117] Optionally, the isolation cover 4 comprises a first isolation cover 41 and a second isolation cover 42, the first isolation cover 41 covers the control signal conversion unit 32, and the second isolation cover 42 covers the driving part 33 and the planar transformer 31.

[0118] It can be understood that the first isolation cover 41 can separate the control signal conversion unit 32 from other electronic components of the ultrasonic cosmetic device, such as the driving part 33 and the planar transformer 31, so as to prevent mutual interference between the control signal conversion unit 32 and the other electronic components, and the second isolation cover 42 can cover the driving part 33 and the planar transformer 31, so as to separate the driving part 33 and the planar transformer 31 from other electronic components of the ultrasonic cosmetic device, so as to prevent mutual interference between the driving part 33 and the planar transformer 31 and the other electronic components.

[0119] In some embodiments, as Figure 4 The ultrasonic cosmetic device further comprises a second circuit board 5, the first circuit board 2 and the second circuit board 5 are arranged in a stack, a gap 6 is arranged between the first circuit board 2 and the second circuit board 5, and the planar transformer 31 is at least partially located in the gap 6.

[0120] It can be understood that the stacked arrangement of the first circuit board 2 and the second circuit board 5 effectively reduces the length of the circuit board structure within the ultrasonic cosmetic device, thereby facilitating a reduction in the lengthwise dimensions of the ultrasonic cosmetic device, thereby facilitating a miniaturized design of the ultrasonic cosmetic device. Furthermore, by locating at least a portion of the planar transformer 31 within the gap 6, the gap 6 can accommodate at least a portion of the planar transformer 31, thereby reducing the space occupied by the planar transformer 31, the first circuit board 2, and the second circuit board 5, thereby facilitating a miniaturized design of the ultrasonic cosmetic device.

[0121] In some embodiments, as Figure 1 and Figure 4 The ultrasonic beauty device further includes a handheld housing 7 , the length direction of the handheld housing 7 is consistent with the length direction of the first circuit board 2 , and the first circuit board 2 and the planar transformer 31 are disposed in the handheld housing 7 .

[0122] It is understood that by grasping the handheld housing 7, the user can move the ultrasonic beauty device to perform ultrasonic beauty treatments on the skin in need of beauty treatments. However, by adopting the planar transformer 31 and providing the accommodation space 21 on the first circuit board 2, the present application effectively reduces the space occupied by the first circuit board 2 and the planar transformer 31, thereby facilitating the miniaturization of the ultrasonic beauty device and allowing the user to directly hold the ultrasonic beauty device.

[0123] The length direction of the handheld housing 7 is consistent with the length direction of the first circuit board 2, which is conducive to the slender design of the ultrasonic beauty device and makes it easier for the user to grasp the ultrasonic beauty device.

[0124] Exemplarily, the ultrasonic beauty device includes a handheld component and a beauty head mounted on the handheld component, the beauty head includes an ultrasonic transducer 1 , and the handheld component includes a handheld housing 7 .

[0125] Optional, such as Figure 1 and Figure 4 In addition to a handheld housing 7, the ultrasonic cosmetic device also includes a dielectric housing 8. The dielectric housing 8 is at least partially disposed within the handheld housing 7. A dielectric chamber 81 is formed between the dielectric housing 8 and the handheld housing 7. The dielectric chamber 81 is used to store an ultrasonic energy conducting medium. The handheld housing 7 is provided with a sound output region 71 corresponding to the sound output region 81. An ultrasonic transducer 1 is disposed within the sound output region 81. The ultrasonic energy focus of the ultrasonic transducer 1 passes through the sound output region 71 for irradiation into the skin to be treated.

[0126] The first circuit board 2 and the planar transformer 31 are located on a side of the dielectric chamber 81 away from the sound output area.

[0127] It can be understood that the ultrasonic energy conduction medium can reduce the loss of ultrasonic energy generated by the ultrasonic transducer 1 during the process of irradiating the skin to be treated, thereby improving the skin care effect.

[0128] The ultrasonic transducer 1 is disposed in the dielectric chamber 81, while the first circuit board 2 and the planar transformer 31 are located on a side of the dielectric chamber 81 away from the sound output area, thereby achieving a reasonable layout of the ultrasonic transducer 1, the first circuit board 2 and the planar transformer 31, effectively utilizing the internal space of the ultrasonic transducer device, and thus facilitating the miniaturization design of the ultrasonic transducer device.

[0129] Alternatively, as Figure 1 The ultrasonic cosmetic device further includes a drive assembly 9, which is disposed within the handheld housing 7 and between the medium chamber 81 and the first circuit board 2. The drive assembly 9 is used to drive the ultrasonic transducer 1 to move within the medium chamber 81. It is understood that the drive assembly 9 needs to be connected to both the first circuit board 2 and the ultrasonic transducer 1. Placing the drive assembly 9 between the medium chamber 81 and the first circuit board 2 facilitates the connection between the drive assembly 9, the first circuit board 2, and the ultrasonic transducer 1, and effectively utilizes the space between the medium chamber 81 and the first circuit board 2. Furthermore, by using the drive assembly 9 to drive the ultrasonic transducer 1 to move within the medium chamber 81, the plane position and / or depth position of the ultrasonic energy focus within the skin can be adjusted.

[0130] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0131] The ultrasonic cosmetic device provided in the embodiments of the present application is introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core concept of the present application. At the same time, for those skilled in the art, according to the concept of the present application, there may be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. An ultrasonic beauty device, characterized in that: include: Ultrasonic transducer; a first circuit board, wherein the first circuit board is provided with a receiving space; A push-pull circuit includes a planar transformer and a main circuit provided on the first circuit board, wherein the planar transformer is at least partially located within the accommodating space, the input end of the main circuit is used to be electrically connected to a DC power supply, and the output end of the main circuit is used to be electrically connected to the ultrasonic transducer, the planar transformer is electrically connected between the input end and the output end of the main circuit, and the push-pull circuit is used to convert DC power into AC power and output it to the ultrasonic transducer through the output end.

2. The ultrasonic cosmetic device according to claim 1, characterized in that: The accommodating space includes a through hole formed on and penetrating the first circuit board, and the planar transformer is at least partially located in the through hole; and / or, The planar transformer comprises a first side wall and a second side wall arranged opposite to each other, wherein the first side wall and the second side wall are respectively located on two sides of the first circuit board; and / or, The planar transformer is mounted on the first circuit board.

3. The ultrasonic cosmetic device according to claim 2, wherein: The planar transformer includes a third circuit board, a coil provided on the third circuit board, and a magnetic core provided on the third circuit board. The third circuit board is mounted on the first circuit board, and at least a portion of the magnetic core is located in the through hole.

4. The ultrasonic cosmetic device according to claim 3, characterized in that: The length direction of the third circuit board is consistent with the length direction of the first circuit board; and / or, Both ends of the third circuit board protrude from both ends of the magnetic core, and both ends of the third circuit board are respectively mounted on the first circuit board; and / or, The third circuit board is welded to the first circuit board so that the third circuit board is mounted on the first circuit board, and the planar transformer is electrically connected between the input terminal and the output terminal of the main circuit; and / or, The magnetic core includes an E-shaped first magnetic core and a flat second magnetic core, the first magnetic core and the second magnetic core are respectively arranged on both sides of the third circuit board, the second magnetic core is arranged in the through hole, and the side of the second magnetic core away from the third circuit board protrudes from the first circuit board; or, the first magnetic core is arranged in the through hole, and the side of the first magnetic core away from the third circuit board protrudes from the first circuit board.

5. The ultrasonic cosmetic device according to claim 1, characterized in that: The main circuit includes a control signal conversion unit and a driving part. The control signal conversion unit is used to output a first frequency signal and a second frequency signal with complementary frequencies. The driving part is connected to the control signal conversion unit. The driving part is used to drive the planar transformer to output alternating current according to the first frequency signal and the second frequency signal. The control signal conversion unit and the driving part are arranged on a side of the planar transformer on the first circuit board away from the ultrasonic transducer.

6. The ultrasonic cosmetic device according to claim 5, characterized in that: The driving part includes a driving unit, a first driving branch and a second driving branch, wherein: The driving unit is connected to the control signal conversion unit, and is configured to output a first driving signal and a second driving signal according to the first frequency signal and the second frequency signal, wherein the first driving signal and the second driving signal have complementary frequencies; The input end of the first driving branch is connected to the first output end of the driving unit, the output end of the first driving branch is connected to the first primary end of the planar transformer, the input end of the second driving branch is connected to the second output end of the driving unit, the output end of the second driving branch is connected to the second primary end of the planar transformer, and the first secondary end of the planar transformer and the second secondary end of the planar transformer are commonly connected to the ultrasonic transducer; The first driving branch and the second driving branch are both arranged between the driving unit and the planar transformer.

7. The ultrasonic cosmetic device according to claim 5, characterized in that: The first circuit board is provided with an electrical output terminal, which is connected to the ultrasonic transducer. The control signal conversion unit, the driving part, the planar transformer and the electrical output terminal are distributed in sequence along the length direction of the first circuit board.

8. The ultrasonic cosmetic device according to claim 5, characterized in that: The ultrasonic beauty device further includes an isolation cover, which is disposed on the push-pull circuit.

9. The ultrasonic cosmetic device according to claim 8, characterized in that: The isolation cover includes a first isolation cover and a second isolation cover. The first isolation cover is provided on the control signal conversion unit, and the second isolation cover is provided on the driving part and the planar transformer.

10. The ultrasonic cosmetic device according to any one of claims 1 to 9, characterized in that: The main circuit further includes a matching unit, the matching unit being coupled between the secondary side of the planar transformer and the ultrasonic transducer, the matching unit being disposed on a side of the planar transformer on the first circuit board that is close to the ultrasonic transducer; and / or, The ultrasonic cosmetic device further includes a handheld housing, wherein a length direction of the handheld housing is consistent with a length direction of the first circuit board, and the first circuit board and the planar transformer are arranged in the handheld housing; and / or, The planar transformer includes a third circuit board, the third circuit board is provided with a second inductor, the second inductor is connected to the center wiring of the planar transformer and the ground, and the second inductor is located on a side of the planar transformer away from the ultrasonic transducer; and / or, The ultrasonic cosmetic device further includes a second circuit board. The first circuit board and the second circuit board are stacked. A gap is provided between the first circuit board and the second circuit board. The planar transformer is at least partially located in the gap.

11. The ultrasonic cosmetic device according to any one of claims 1 to 9, characterized in that: The ultrasonic cosmetic device further includes a handheld housing and a dielectric housing, wherein the dielectric housing is at least partially disposed within the handheld housing. A dielectric chamber is formed between the dielectric housing or between the dielectric housing and the handheld housing, and is used to store an ultrasonic energy conducting medium. The handheld housing is provided with a sound output region corresponding to the sound output region. The ultrasonic transducer is disposed within the media chamber, and an ultrasonic energy focus of the ultrasonic transducer passes through the sound output region for irradiation into the skin to be treated. The first circuit board and the planar transformer are arranged in the handheld housing, and the first circuit board and the planar transformer are located on a side of the dielectric chamber away from the sound output area; the length direction of the handheld housing is consistent with the length direction of the first circuit board.

12. The ultrasonic cosmetic device according to claim 11, characterized in that: The ultrasonic cosmetic device further includes a driving assembly, which is disposed in the handheld housing and located between the medium chamber and the first circuit board. The driving assembly is used to drive the ultrasonic transducer to move in the medium chamber.

13. The ultrasonic cosmetic device according to claim 4, characterized in that: The ratio of the length of the portion of the first end of the third circuit board protruding from the magnetic core to the length of the magnetic core is 0.3-0.65; and / or, The length of the portion of the first end of the third circuit board protruding from the magnetic core is 0.5 cm to 1.6 cm; and / or, The third circuit board is welded to the first circuit board at edges at both ends of the third circuit board; and / or, The ratio of the length of the portion of the second end of the third circuit board protruding from the magnetic core to the length of the magnetic core is 0.3-0.65; and / or, The length of the portion of the second end of the third circuit board protruding from the magnetic core is 0.5 cm to 1.6 cm.

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