Handpiece and skin treatment device

Abstract

The utility model discloses a handpiece and a skin treatment device, the handpiece comprises: a housing, one end of which is used for assembling a tool bit; the driving structure comprises a driving assembly and a transmission shaft which are arranged in the length direction of the shell, and the transmission shaft is used for driving the transducer assembly to move; the driving support comprises a mounting frame, a supporting column and a buffer pad, the mounting frame is used for mounting the driving assembly, one end of the supporting column is fixedly connected with the mounting frame, the other end of the supporting column is fixedly connected with the inner side wall of the shell, and the buffer pad is arranged at the joint of the supporting column and the mounting frame; the driving assembly and the installation frame are hung on the supporting column. According to the technical scheme, the vibration sense of the handpiece during working can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of beauty technology, and in particular to a handheld device and a skin treatment device. Background Technology

[0002] Ultrasonic therapy is a common treatment method in the medical aesthetics industry. During an ultrasonic therapy session, the transducer inside the handpiece generates focused ultrasound waves that target specific areas of the skin, providing anti-aging and lifting effects. For example, ultrasonic therapy surpasses the depth limitations of traditional non-surgical devices, reaching deep into the SMAS (Superficial Musculo-Aponeurotic System) fascia layer. The ultrasound energy concentrates at the treatment point, generating high temperatures that cause the target tissue to contract and stimulate collagen regeneration, resulting in anti-aging, wrinkle reduction, firming, lifting, and contour tightening. The energy waves generated by the transducer can directly act on the fascia layer, causing it to contract.

[0003] To reduce the frequency of users moving the ultrasonic treatment device, the transducer is designed to move relative to the product's outer casing. This movement is achieved through a drive mechanism and transmission components. During operation, the drive mechanism inevitably generates vibrations, which are ultimately transmitted to the outer casing of the handheld part. This results in a relatively strong vibration in the handheld part when the user uses the device, hindering their comfortable use. Utility Model Content

[0004] The main purpose of this utility model is to provide a handheld component that reduces vibration during operation.

[0005] To achieve the above objectives, the present invention provides a handheld device for a skin treatment apparatus. The handheld device includes: a housing, one end of which is used to mount the blade head; a drive structure, comprising a drive assembly and a transmission shaft arranged along the length of the housing, the transmission shaft being used to drive the transducer assembly to move; and a drive bracket, comprising a mounting frame, a support column, and a buffer pad. The mounting frame is used to mount the drive assembly, one end of the support column is fixedly connected to the mounting frame, and the other end is fixedly connected to the inner sidewall of the housing. The buffer pad is disposed at the connection between the support column and the mounting frame. The drive assembly and the mounting frame are suspended on the support column.

[0006] This application further proposes a skin treatment device, which includes a blade and a handheld component.

[0007] In this invention, by suspending the drive assembly and mounting bracket on the support column, the vibration generated during operation of the drive assembly and mounting bracket is transmitted to the outer shell through the support column. By placing a buffer pad at the connection between the mounting bracket and the support column, the vibration on the mounting bracket needs to pass through the buffer pad before being transmitted to the support column. During the process of vibration passing through the buffer pad, the buffer pad absorbs the energy of the vibration through elastic deformation (converting the mechanical energy of the vibration into the potential energy and heat energy of the deformation), which greatly reduces the amount of vibration transmitted from the mounting bracket to the support column, thus reducing the vibration of the outer shell. At the same time, placing the buffer pad on the bracket and the support column bracket avoids direct contact between the two rigid components, which can reduce the noise generated by the contact vibration between the rigid components, thus reducing the noise generated when the handheld part is working. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the structure of an embodiment of the skin treatment device of this utility model;

[0010] Figure 2 for Figure 1 A schematic diagram of the structure of one embodiment of the mid-hand component;

[0011] Figure 3 This is a schematic diagram of the internal structure of an embodiment of the skin treatment device of this utility model;

[0012] Figure 4 This is a schematic diagram of another embodiment of the skin treatment device of this utility model;

[0013] Figure 5 This is a schematic diagram of the internal structure of an embodiment of the blade of this utility model;

[0014] Figure 6 This is a schematic diagram of the structure of another embodiment of the blade of this utility model;

[0015] Figure 7 This is a schematic diagram of another embodiment of the blade of this utility model;

[0016] Figure 8 This is a schematic diagram of the structure of an embodiment of the telescopic tube in this utility model;

[0017] Figure 9 This is a schematic diagram of another embodiment of the telescopic tube in this utility model;

[0018] Figure 10 This is a schematic diagram of the structure of an embodiment of the first support in this utility model;

[0019] Figure 11 for Figure 10 A structural diagram from another perspective;

[0020] Figure 12 This is a schematic diagram of another embodiment of the telescopic tube in this utility model;

[0021] Figure 13 for Figure 12 Internal structural diagram of the central fixing part;

[0022] Figure 14 This is a schematic diagram of the internal structure of another embodiment of the blade of this utility model;

[0023] Figure 15 This is a schematic diagram of one embodiment of the sealing connection structure in this utility model;

[0024] Figure 16 This is a schematic diagram of the internal structure of another embodiment of the blade of this utility model;

[0025] Figure 17 This is a schematic diagram of the internal structure of another embodiment of the blade of this utility model;

[0026] Figure 18 This is a schematic diagram of the structure of one embodiment of the drive mechanism in this utility model;

[0027] Figure 19 This is a schematic diagram of another embodiment of the drive mechanism in this utility model;

[0028] Figure 20 This is a schematic diagram of another embodiment of the drive mechanism in this utility model;

[0029] Figure 21 This is a schematic diagram of one embodiment of the swing structure in this utility model;

[0030] Figure 22 This is a schematic diagram of the structure of one embodiment of the card slot in this utility model;

[0031] Figure 23 This is a schematic diagram of the internal structure of another embodiment of the blade of this utility model;

[0032] Figure 24 for Figure 23 A magnified schematic diagram of the local structure at point A;

[0033] Figure 25 for Figure 23 A magnified view of the structure at point B in the middle;

[0034] Figure 26 This is a schematic diagram of the internal structure of another embodiment of the blade of this utility model;

[0035] Figure 27 for Figure 26 A magnified schematic diagram of the structure at point C in the middle;

[0036] Figure 28 for Figure 26 A magnified schematic diagram of the local structure at point E;

[0037] Figure 29 This is a schematic diagram of one embodiment of the encapsulation film structure in this utility model;

[0038] Figure 30 This is a schematic diagram of the structure of one embodiment of the handheld component in this utility model;

[0039] Figure 31 This is a schematic diagram of another embodiment of the handheld component in this utility model;

[0040] Figure 32 This is a schematic diagram of another embodiment of the handheld component in this utility model;

[0041] Figure 33 This is a structural schematic diagram of another embodiment of the handheld component in this utility model;

[0042] Figure 34 This is a schematic diagram of the structure of one embodiment of the back shell in this utility model;

[0043] Figure 35 This is a schematic diagram of the internal structure of another embodiment of the skin treatment device of this utility model;

[0044] Figure 36 for Figure 35 A magnified schematic diagram of the local structure at point F;

[0045] Figure 37 for Figure 35 A magnified schematic diagram of the local structure at point G;

[0046] Figure 38 This is a schematic diagram of another embodiment of the handheld component in this utility model;

[0047] Figure 39 for Figure 38 A magnified schematic diagram of the local structure at point H;

[0048] Figure 40 This is a schematic diagram of the structure of one embodiment of the limiting cover plate in this utility model;

[0049] Figure 41This is a schematic diagram of the internal structure of an embodiment of the skin treatment device of this utility model;

[0050] Figure 42 for Figure 41 A magnified schematic diagram of the local structure at point I;

[0051] Figure 43 This is a schematic diagram of the structure of one embodiment of the buffer pad in this utility model;

[0052] Figure 44 This is a schematic diagram of one embodiment of the driving structure in this utility model;

[0053] Figure 45 This is a schematic diagram of another embodiment of the driving structure in this utility model;

[0054] Figure 46 This is a structural schematic diagram of one embodiment of the main shell in this utility model;

[0055] Figure 47 This is a schematic diagram of the internal structure of another embodiment of the skin treatment device of this utility model;

[0056] Figure 48 This is a schematic diagram of the internal structure of another embodiment of the skin treatment device of this utility model.

[0057] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0058] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0059] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0060] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0061] This utility model mainly proposes a skin treatment device, primarily used for skin care. It achieves cosmetic effects such as beautification, lifting, and wrinkle removal by injecting ultrasound waves into the skin. This application mainly uses ultrasonic beauty instruments and ultrasonic care instruments as examples. The skin treatment device in this application has several improvements, such as the driving form and structure of the transducer, and the structural design to balance the water pressure fluctuations generated during transducer movement, which will be reflected in different embodiments. The following embodiments will specifically describe the specific structure of the skin treatment device. The skin treatment device typically includes a handheld part and a treatment head. The handheld part is for holding during use, and the treatment head can take various forms, such as an ultrasonic head or a light therapy head. The handheld part and the treatment head can be a fixedly connected integrated unit or detachable separate units.

[0062] To facilitate understanding of the technical solutions of this application, the working principle of the important solutions is briefly introduced first. The skin treatment device includes a handheld component 10 and a blade head 20. The handheld component 10 includes a drive assembly 210, a drive shaft 250 connected to the drive assembly 210, and a first magnetic element 260 disposed at the drive end of the drive shaft 250. The blade head 20 includes a housing 600, a transducer assembly 700 disposed within the housing 600, and a sealing connection assembly 800. The housing 600 has a sound wave outlet 611 for emitting ultrasonic waves. The sealing connection assembly 800 includes a sealing telescopic tube 810 and a second magnetic element 820 fixedly installed within the sealing telescopic tube 810. The housing 600 is detachably mounted to the handheld component 10. The drive shaft 250 extends into the sealing telescopic tube 810 and is magnetically connected to the second magnetic element 820 via the first magnetic element 260 to drive the transducer assembly 700 to move in a first direction. A drive mechanism 900 is provided inside the cutter head 20. The drive mechanism 900 is connected to the transducer assembly 700 and is used to drive the transducer assembly 700 to move in a second direction. The first direction and the second direction are different directions (in some other embodiments, they can be the same direction). The plane defined by the first direction and the second direction is the path plane, which is parallel to the acoustic wave outlet 611. Taking the parallel arrangement of the two as an example.

[0063] To explain the working principle of the treatment head, let's take the ultrasound head as an example. During treatment, the ultrasound device uses a transducer inside the ultrasound head to generate focused ultrasound waves, creating treatment points in the lower layers of the skin to achieve anti-aging, lifting, or wrinkle reduction effects. For example, the ultrasound device surpasses the depth limitations of traditional non-surgical devices, penetrating deep into the SMAS (Superficial Musculo-Aponeurotic System) fascia layer. The ultrasound energy concentrates at the treatment point, generating high temperatures that cause the target tissue to contract and stimulate collagen regeneration, resulting in anti-aging, wrinkle reduction, firming, lifting, and contouring effects. The energy waves generated by the transducer can directly act on the fascia layer, causing it to contract. In some solutions, to adjust the acoustic impedance and ensure efficient operation of the ultrasound transducer, it is placed in a liquid environment.

[0064] The following will mainly describe the specific structure of the skin treatment device.

[0065] Reference Figures 1 to 6In this embodiment of the invention, the skin treatment device includes a handheld component 10 and a blade head 20. The handheld component 10 and the blade head 20 can be a fixedly connected integral structure or a detachable separate structure. In this embodiment, the handheld component 10 and the blade head 20 are detachably connected as an example. There are many ways to connect the handheld component 10 and the blade head 20, such as snap-fit ​​connection, screw or other fastener connection, threaded connection, magnetic adsorption connection, adhesive connection, heat fusion welding, etc., and no special limitation is made here.

[0066] In some embodiments, to increase the effective area while reducing the frequency of user movement of the skin treatment device, the transducer within the blade head 20 is made movable. There are many ways to drive the transducer to move, such as providing a drive structure 200 (which can be manually or automatically driven) on the blade head 20, or providing a drive structure 200 within the handheld component 10, driving the transducer to move via a transmission component. Of course, in some embodiments, drive structures 200 can be provided simultaneously in both the handheld component 10 and the blade head 20; the two drive structures 200 can drive the transducer to move independently or in cooperation.

[0067] The structures of the cutter head 20 and the handheld component 10 are described below.

[0068] Please refer to Figures 4 to 11 The blade head 20 includes a housing 600, a transducer assembly 700 (providing an ultrasonic transducer 750 and its transducer support 710) and a sealing connection assembly 800 (providing an environment and connection components for a sealed connection with the handheld part 10) disposed within the housing 600, and an encapsulation membrane structure 950 (providing an encapsulated acoustic wave outlet 611 structure and a skin adhesion detection structure) disposed corresponding to the sound output area 21 of the housing 600. In some other embodiments, the blade head 20 may also include a drive mechanism 900 (for driving the ultrasonic transducer 750 to move within the housing 600), a transmission mechanism 920 (for transmitting the power of the drive mechanism 900 to the ultrasonic transducer 750, causing the ultrasonic transducer 750 to move), and a hydraulic balancing component (for balancing changes in liquid pressure within the housing 600 to reduce liquid fluctuations), etc. Of course, in some embodiments, for the purpose of facilitating communication or control, the cutter head 20 may also include an electronic control board, which may be electrically connected to one or more of the transducer assembly 700, the encapsulation membrane structure 950, the drive mechanism 900, and the handheld component 10.

[0069] The overall shape of the housing 600 can vary, such as being roughly square (cube, cuboid), frustum-shaped, etc., without any particular limitation. The housing 600 has a mounting cavity 610, a connecting hole 612, and an acoustic wave outlet 611. In some embodiments, a vent hole 613 may also be included. The acoustic wave outlet 611 is formed on one side of the housing 600 and is used to allow the acoustic waves emitted by the ultrasonic transducer 750 to be transmitted from the mounting cavity 610. The acoustic wave outlet 611 corresponds to the sound emission area 21, and the encapsulation membrane structure 950 is sealed to the acoustic wave outlet 611 to prevent liquid leakage from the mounting cavity 610.

[0070] The housing 600 can be configured in various ways, such as including a front housing and a rear housing, a left housing and a right housing, an upper housing 650 and a lower housing 660, etc., without any special limitations. The following description mainly uses an upper housing 650 and a lower housing 660 as an example, wherein the acoustic outlet 611 is located on the upper housing 650.

[0071] To prevent liquid leakage from the housing 600, the upper housing 650 and the lower housing 660 are sealed together. There are many ways to seal the upper housing 650 and the lower housing 660, such as using sealant, heat fusion, welding, etc.

[0072] In one embodiment, a sealing recess 653 is provided on one of the upper shell 650 and the lower shell 660, and a sealing rib 662 is provided on the other. The sealing rib 662 is inserted into the sealing recess 653. Optionally, a sealing adhesive layer may also be provided in the sealing recess 653 to improve the sealing effect. The sealing connection position of the upper shell 650 and the lower shell 660 is located in or approximately in the same vertical plane, which can avoid the phenomenon of poor sealing effect due to misalignment of the connection position.

[0073] The connecting hole 612 and the vent 613 can be provided on the upper shell 650 or the lower shell 660. In some embodiments, they can also be partially located on the upper shell 650 and partially located on the lower shell 660. No special limitation is made here, and it is assumed that they are both located on the upper shell 650. During assembly, the components inside the shell 600 can be assembled first, and then the upper shell 650 and the lower shell 660 can be sealed and connected.

[0074] It is worth noting that in some embodiments, the cutter head 20 also includes a decorative shell 670, which covers the outside of the housing 600. There are many ways to connect the decorative shell 670 and the housing 600, such as by snap-fit ​​connection, screw fastening connection, adhesive connection, etc., which are not specifically limited here.

[0075] In some embodiments, the decorative shell 670 and the housing 600 are connected by a snap-fit ​​mechanism, which facilitates their installation and disassembly. In other embodiments, to improve the sealing of the connection between the decorative shell 670 and the housing 600 and prevent water, insects, dust, etc., from entering the space between them, a sealing layer can be provided at the contour boundary of the two to seal the space formed by their enclosed space.

[0076] In some embodiments, the decorative shell 670 at least partially covers the shell 600, and the vent 613 is covered by the decorative shell 670, thus concealing the vent 613 to prevent it from being directly exposed to the external environment and to prevent moisture, dust, and insects from entering the balance telescopic tube 830. Simultaneously, after the decorative shell 670 and the shell 600 are engaged, a ventilation space is formed at the location of the vent 613, allowing the balance telescopic tube 830 to communicate with the ventilation space, which facilitates the intake and exhaust of air by the balance telescopic tube 830.

[0077] Regarding the connecting hole 612 and the vent hole 613, the connecting hole 612 and the vent hole 613 penetrate the side wall of the housing 600. They are located on adjacent or opposite side walls of the housing 600, with the side walls on which they are located being arranged opposite each other, and for example, being adjacent to the side wall where the sound wave outlet 611 is provided.

[0078] In some embodiments, the depth directions of the connecting hole 612 and the vent hole 613 are aligned, and they are symmetrical about the transducer assembly 700.

[0079] In some embodiments, the connecting hole 612 and the vent hole 613 may be coaxially arranged.

[0080] The direction in which the connecting hole 612 and the vent 613 penetrate the sidewall can be varied. In this embodiment, the connecting hole 612 and the vent 613 penetrate the sidewall along the thickness direction of the sidewall of the housing 600 as an example, so that the mounting cavity 610 of the housing 600 is connected to the outside of the housing 600 (when no other components are provided, the mounting cavity 610 is connected to the outside of the housing 600; when other components are provided, the specific object connected can be determined according to the situation. For example, when a tube is provided inside the housing 600, the object connected by the connecting hole 612 and the vent 613 may be the inside of the tube and the outside of the housing 600).

[0081] The connecting hole 612 and the vent hole 613 can have many shapes, such as circular, square, triangular, elliptical, plum blossom-shaped, etc. No special limitation is made here, and a circular shape is taken as an example.

[0082] There are many ways to describe the internal structure of the cutter head 20, and no specific limitation is made here. It is worth noting that the order in which the descriptions are presented does not affect the interrelationship and function of the various parts, nor should it affect the ability of those skilled in the art to combine elements (component features, connection features, positional features, and technical solutions) in different embodiments (except for those that those skilled in the art determine cannot be combined). When describing each component, it can be described individually or placed within a complete embodiment (a complete embodiment as a background can better demonstrate the function of the component).

[0083] The following is an example of a specific explanation order. First, the structures related to the connecting hole 612 and the vent 613 are introduced, such as the sealing connection assembly 800 and its connection, the balancing component and its connection, the transducer assembly 700 and its connection, the structure of the drive mechanism 900, etc. Then, the structures related to the acoustic wave outlet 611 are introduced, such as the encapsulation membrane structure 950, etc.

[0084] We will describe the sealing connection assembly 800 within the complete embodiment.

[0085] Please refer to Figures 4 to 14 In some embodiments, a skin treatment device includes a handheld component 10 and a blade head 20. The handheld component 10 includes a drive assembly 210, a drive shaft 250 tractively connected to the drive assembly 210, and a first magnetic element 260 disposed at the drive end of the drive shaft 250. The blade head 20 includes a housing 600, a transducer assembly 700, and a sealing connection assembly 800. The housing 600 has a mounting cavity 610 and a communicating hole 612, the communicating hole 612 penetrating the sidewall of the housing 600. The transducer assembly 700 is movably disposed within the mounting cavity 610. The sealing connection assembly 800 includes a sealing telescopic tube 810 and a second magnetic element 820 fixedly installed within the sealing telescopic tube 810. A fixing portion 819 is formed on the sealing telescopic tube 810 corresponding to the second magnetic element 820. The fixing portion 819 has a self-sealing structure and is fixedly connected to the transducer assembly 700. The sealing telescopic tube 810 has an open end 811, which is sealed to the housing 600 and communicates with the connecting hole 612. The housing 600 is detachably mounted on the handheld component 10. The drive shaft 250 extends into the sealing telescopic tube 810 through the connecting hole 612 and the open end 811 to magnetically connect with the second magnetic element 820, thereby driving the transducer assembly 700 to move.

[0086] Specifically, in this embodiment, the sealing connection assembly 800 includes a sealing telescopic tube 810 and a second magnetic component 820 fixedly installed within the sealing telescopic tube 810. The first magnetic component 260 and the second magnetic component 820 are components with magnetic adsorption capabilities (such as magnets, magnets, electromagnets 930, etc.) or the ability to be magnetically adsorbed (such as metallic iron or iron-containing alloys). Based on the premise that the first magnetic component 260 and the second magnetic component 820 can attract each other, and assuming that both the first magnetic component 260 and the second magnetic component 820 are magnets, this embodiment is used as an example.

[0087] The first magnetic component 260 and the second magnetic component 820 can take many forms, such as block, column, disc, etc. Their overall shape can be circular, triangular, elliptical, square, etc., taking the cross-sectional shape of the sealing telescopic tube 810 as an example.

[0088] There are many forms of sealed expansion joints 810, such as corrugated pipes and elastic pipes. They can be stretched and compressed when subjected to external forces. No special limitations are made here. We will take corrugated pipes as an example.

[0089] The sealing in the sealing expansion tube 810 refers to the sealing and isolation of the internal space and installation cavity of the tube, preventing liquid from entering the tube. The fixing part 819 on the sealing expansion tube 810 can take many forms, such as a protrusion, a rib, or even be part of the tube wall itself. The connection between the fixing part 819 and the transducer assembly 700 can be achieved in various ways, such as through snap-fit ​​connections, slot connections, magnetic connections, screws, cable ties, or other fasteners.

[0090] The self-sealing structure refers to a structure in which the sealing telescopic tube 810 achieves a seal at the fixing part 819 through its own structure. For example, the fixing part may be located at the closed end or in the middle of the sealing telescopic tube 810. At this location, the internal space of the sealing telescopic tube 810 and its external environment are sealed and isolated, preventing water, gas, dust, etc., from entering the sealing telescopic tube 810. This prevents liquid in the mounting cavity 610 from entering the sealing telescopic tube 810 through the fixing part 819 (where the sealing telescopic tube 810 connects to the transducer assembly 700). Furthermore, it eliminates the need for an additional sealing structure between the sealing telescopic tube and the transducer assembly, and the self-sealing structure of the fixing part ensures a stable and durable seal, thereby improving the operational stability of the skin treatment device.

[0091] After the open end 811 of the sealed telescopic tube 810 is connected to the connecting hole 612, that is, after the open end of the sealed telescopic tube is sealed and connected to the connecting hole of the housing, a connecting channel 868 can be formed at the sealed connection, communicating with the interior of the sealed telescopic tube. The internal space of the sealed telescopic tube 810 can communicate with the outside of the housing 600 through the connecting channel 868. The connecting channel 868 refers to the channel used to connect the interior of the telescopic tube and the outside of the housing 600 after the telescopic tube is sealed and connected to the side wall of the housing 600. The telescopic tube can be the sealed telescopic tube 810 or the balanced telescopic tube 830. The connecting channel 868 can take various forms; it can be a single hole structure or a combination of multiple hole structures. For example, it can be the port of the open end 811 and / or the connecting hole 612. This allows the drive shaft 250 to enter the sealed telescopic tube 810 from the outside of the housing 600 through the connecting channel 868 (connecting hole 612 and open end 811) and connect with the second magnetic component 820. There are many ways to seal the open end 811 to the inner wall of the housing 600, such as by adhesive sealing, heat fusion, fastener connection such as screws. Of course, in some embodiments, the sealing connection can also be achieved by additional components, such as the sealing connection structure 850.

[0092] In this embodiment, by sealing the open end of the telescopic tube 810 to the communicating hole of the housing 600, the housing 600 can be sealed by the telescopic tube 810 to prevent liquid leakage. Simultaneously, a communicating channel 868 is formed at the sealed connection, connecting the telescopic tube 810 to the interior of the telescopic tube 810. This allows for ventilation and allows the drive shaft 250 to extend into the telescopic tube 810. By designing the connection between the telescopic tube 810 and the transducer assembly 700 as a self-sealing fixing part, the connection between the telescopic tube 810 and the transducer assembly 700 is facilitated without the need for an additional sealing structure. The self-sealing fixing part provides a stable and durable seal, improving the stability of the skin treatment device. Furthermore, the connection between the telescopic tube 810 and the transducer assembly 700 is sealed, isolating the space inside the telescopic tube 810 from the mounting cavity while maintaining communication with the external environment. This allows the drive shaft 250 and the second magnetic component 82 to communicate. The first magnetic element 260 does not come into contact with the liquid inside the housing 600, thus preventing corrosion of the drive shaft 250 and magnets, which could affect the lifespan of the skin treatment device and cause leakage. Simultaneously, the second magnetic element 820 is housed within the sealed telescopic tube 810 and fixedly connected to the transducer assembly 700 via a fixing part. This allows the transducer assembly 700 to move through the magnetic connection between the first magnetic element 260 and the second magnetic element 820. Furthermore, direct contact between the first magnetic element 260 and the second magnetic element 820 enhances the magnetic adsorption effect, enabling the drive assembly 210 and drive shaft 250 to stably and reliably drive the transducer assembly 700. Moreover, the magnetic connection between the first magnetic element 260 and the second magnetic element 820 facilitates detachable connection between the blade and the housing 600, allowing for blade replacement to achieve different functions.

[0093] In some embodiments, in order to improve the installation stability of the second magnetic component 820, an installation groove 813 is formed in the sealed telescopic tube 810. The installation groove 813 is provided corresponding to the fixing part 819, that is, the installation groove 813 is provided on the inner side of the fixing part 819, and the second magnetic component 820 is installed in the installation groove 813.

[0094] Specifically, in this embodiment, the mounting groove 813 can take many forms, including a continuous groove or multiple grooves arranged at intervals. At least a portion of the second magnetic component 820 is installed within the mounting groove 813. This significantly improves the installation stability of the second magnetic component 820 and also facilitates the use of the hardness of the second magnetic component 820 to achieve a fixed connection with the transducer assembly.

[0095] In a specific embodiment, the mounting groove 813 can correspond completely or partially to the inner side of the fixing part 819, as long as the fixing part 819 can correspond to the second magnetic element 820 when it is connected to the transducer assembly 700.

[0096] In this embodiment, taking the case where the mounting groove 813 is completely aligned with the inner side of the fixing part 819, this increases the connection area between the second magnetic element 820 and the transducer assembly 700. It also facilitates the use of a rigid second magnetic element 820, allowing for better fixation and improving installation stability. In some embodiments, to further improve the installation stability of the second magnetic element 820, the mounting groove 813 is an annular groove, with the edge of the second magnetic element 820 engaged in the annular groove. By setting the mounting groove 813 as an annular groove, the entire periphery of the second magnetic element 820 is engaged by the annular groove, increasing the mating area and force uniformity between the second magnetic element 820 and the mounting groove 813, which is beneficial for the stable installation of the second magnetic element 820.

[0097] There are various working conditions regarding the form of the sealing telescopic tube 810 and the position of the fixing part 819. For example, the fixing part 819 may be located at the end of the sealing telescopic tube 810 away from the open end 811, or the fixing part 819 may be located in the middle of the sealing telescopic tube 810. The end away from the open end 811 may be a self-closing end 812, or the end away from the open end 811 may be an end with an opening. Examples will be given below.

[0098] In some embodiments, the sealing telescopic tube 810 further has a self-closing end 812, and the fixing part 819 and the second magnetic element 820 are located at the self-closing end 812. In this embodiment, the end of the sealing telescopic tube 810 away from the open end 811 is the self-closing end 812, and the fixing part 819 is formed at the self-closing end 812. During the movement of the sealing telescopic tube 810 driven by the transducer assembly 700, the entire sealing telescopic tube 810 can be stretched or compressed, which greatly improves the utilization rate of the sealing telescopic tube 810. Moreover, it can help improve the ease of installation.

[0099] Furthermore, the self-sealing end 812 forms an installation space 814 with one open end. The installation space 814 can be formed by an annular groove and an end face. The second magnetic element 820 is enclosed within the installation space 814, with the side of the second magnetic element 820 facing away from the open end abutting against the inner wall of the installation space 814 (i.e., the inner side of the end face). By forming the installation space 814 at the self-sealing end 812 to encapsulate the second magnetic element 820 within the sealed telescopic tube 810, the connection stability between the second magnetic element 820 and the sealed telescopic tube 810 is significantly improved. Simultaneously, by having the side of the second magnetic element 820 facing away from the open end abut against the inner wall of the installation space 814, it facilitates the rapid positioning of the second magnetic element 820 within the sealed telescopic tube 810. Understandably, when installing the second magnetic component 820 into the sealed telescopic tube 810, the second magnetic component 820 is inserted into the tube from the open end 811, and then moved to the designated position in the sealed telescopic tube 810. Through the installation space 814, the second magnetic component 820 can be directly pushed to the end of the self-closing end 812. The inner wall of the installation space 814 (the inner wall opposite the open end) will abut and limit the second magnetic component 820. In this way, the second magnetic component 820 can be quickly and accurately installed into the designated position in the sealed telescopic tube 810.

[0100] In some embodiments, a fixing portion 819 may be formed between the two ends of the sealing telescopic tube 810, so that a first telescopic portion 81a and a second telescopic portion 81b are formed on both sides of the fixing portion 819. The first telescopic portion 81a has an open end 811, and the end of the second telescopic portion 81b away from the fixing portion 819 is formed as a self-closing end 812 connected to the housing 600. Alternatively, the end of the second telescopic portion 81b away from the fixing portion 819 is sealed to the housing 600. In this embodiment, the fixing portion 819 is located in the middle of the sealing telescopic tube 810, such that after the fixing portion 819 is fixedly connected to the transducer assembly 700, the compression and tension states of the first telescopic portion 81a and the second telescopic portion 81b are different. That is, when the first telescopic portion 81a is stretched, the second compression portion is compressed, and when the first telescopic portion 81a is compressed, the second telescopic portion 81b is stretched.

[0101] The first telescopic section 81a communicates with the external environment through its open end 811, allowing for easy exhaust and intake of internal gaseous substances. The second telescopic section 81b can communicate with the first telescopic section 81a, or it can communicate with the outside of the housing 600 through its end away from the first telescopic section 81a. Thus, the second telescopic tube can be directly (through its end away from the first telescopic section 81a) or indirectly (through its communication with the first telescopic section 81a) to the outside. Of course, in some embodiments, it is not excluded that both ends of the second telescopic section 81b are closed.

[0102] It is understandable that in a scheme where both the first telescopic part 81a and the second telescopic part 81b are connected to the outside, during the process of the transducer assembly driving the sealed telescopic tube to move, it is beneficial to keep the deformation of the first telescopic part 81a and the second telescopic part 81b consistent or tend to be consistent, thereby reducing the pressure change and oscillation degree of the liquid filling the shell. This can reduce the risk of damage to the acoustic membrane 951 on the one hand, and reduce the generation of bubbles on the other hand, which can help improve the ultrasonic energy transmission effect.

[0103] It is worth noting that there are several ways in which the second telescopic part 81b can communicate with the outside, and examples are given below. Specifically, when the end of the second telescopic part 81b away from the fixed part 819 is formed as a self-closing end 812 connected to the housing 600, the second magnet can be provided with a connecting hole 821 connecting the first telescopic section and the second telescopic section, and / or the fixed part can be provided with a connecting hole 821. By providing a connecting hole 821 on the second magnetic element 820, the first telescopic part 81a and the second telescopic part 81b are connected, thereby allowing the second telescopic part 81b to communicate with the external environment through the first telescopic part 81a.

[0104] In this context, the connecting hole 821 of the second magnetic element 820 refers to the space penetrating the second magnetic element 820. It is a broad concept of a hole structure, encompassing not only annular holes but also partial holes, such as notches. Taking the connecting hole 821 of the second magnetic element 820 formed at its edge as an example, the middle part of the second magnetic element 820 is magnetically attracted to the first magnetic element 260, while the edge can be fixedly connected to the transducer bracket 710 via the fixing part 819, and gas can also pass through it.

[0105] Specifically, when the end of the second telescopic tube away from the fixed part 819 is an open end, a vent hole 613 can be opened on the side wall of the housing 600, and the end of the second telescopic tube away from the fixed part 819 can be sealed and connected to the vent hole 613, so that the second telescopic tube can be connected to the outside of the housing 600 through the vent hole 613.

[0106] In some embodiments, to allow for a more accurate connection between the first magnetic element 260 and the second magnetic element 820, the centroid of the second magnetic element 820 is positioned close to the straight line containing the axis of the connecting hole 612. Thus, in this embodiment, by positioning the centroid of the second magnetic element 820 close to the straight line containing the axis of the connecting hole 612, the centroid of the second magnetic element 820 is made closer to the centroids of the drive shaft 250 and the first magnetic element 260 (which move along a straight line through the connecting hole 612 into the sealed telescopic tube 810). This allows the first magnetic element 260 to be precisely aligned with the second magnetic element 820 when it enters the sealed telescopic tube 810 with the drive shaft 250, resulting in a more accurate connection between the first magnetic element 260 and the second magnetic element 820.

[0107] In some embodiments, to maximize the contact area between the first magnetic element 260 and the second magnetic element 820 and improve the stability of the connection, the thickness direction of the second magnetic element 820 is aligned with the length direction of the sealing telescopic tube 810, so that the larger surface area of ​​the second magnetic element 820 faces the connecting hole 612. Thus, when the first magnetic element 260 enters the sealing telescopic tube 810 and magnetically attracts the second magnetic element 820, the larger surface area of ​​the second magnetic element 820 is in contact with the first magnetic element 260, increasing the contact area between the two magnetic elements and thereby enhancing the magnetic attraction force between them.

[0108] In some embodiments, the transducer assembly 700 has a first moving direction and a second moving direction. The first moving direction is consistent with the depth direction of the connecting hole 612, and the second moving direction is inclined or perpendicular to the first moving direction. During the movement of the transducer assembly 700 in the first moving direction and / or the second moving direction, it has at least one connection position. When the transducer assembly 700 is in the connection position, the extension line of the axis of the connecting hole 612 passes through the middle region of the second magnetic element 820. Specifically, in this embodiment, the transducer assembly 700 can move as a whole along the second direction. There are many possible structures for the movement, such as driving by a motor or driving by a hydraulic pump. The moving surface determined by the first and second directions can be parallel to the acoustic outlet 611 of the housing 600, or it can be at a certain angle to the acoustic outlet 611. Of course, in some embodiments, it can also be perpendicular to the acoustic outlet 611. No special limitation is made here; the example is that the moving surface is parallel to the acoustic outlet 611. By setting the connection position, it is ensured that when the first magnetic component 260 enters the sealed telescopic tube 810, it can be accurately and reliably connected with the second magnetic component 820. This significantly improves the ease of connection between the first magnetic component 260 and the second magnetic component 820.

[0109] There are many ways to connect the second magnetic element 820 to the transducer assembly 700, and specific examples can be found in the following embodiments. The structure of the transducer assembly 700 is involved, and to more clearly describe the connection methods between the second magnetic element 820 and the transducer assembly 700, the structure of the transducer assembly 700 in some embodiments will be specifically described.

[0110] For example, the transducer assembly 700 includes a transducer support 710 and an ultrasonic transducer 750 disposed on the transducer support 710.

[0111] The transducer bracket 710 can take many forms, such as a single bracket or a combination of multiple brackets. No special limitation is made here. It will be specifically described in the following embodiments according to different working conditions.

[0112] For example, the transducer bracket 710 includes a mounting bracket 716 for fixing the ultrasonic transducer 750, and an assembly bracket 717 for cooperating with other components (such as the housing 600, the second magnetic component 820, the drive mechanism 900, etc.). The assembly bracket 717 can be a standalone bracket or a combination bracket; no special limitation is made here. The following example uses an assembly bracket 717 including a detachable first bracket 711 and a second bracket 712. The transducer assembly 700 will be described in more detail below according to different operating conditions and specific embodiments.

[0113] In some embodiments, the transducer bracket 710 is provided with a corresponding slot 720, and the second magnetic element 820 and the fixing part 819 are engaged in the slot 720, that is, the fixing part 819 is at least partially engaged in the slot 720, and the edge portion of the second magnetic element 820 is engaged in the slot 720. In this way, the hardness of the second magnetic element 820 can be used to achieve a stable assembly with the slot 720.

[0114] Specifically, the slot 720 can be formed in many ways, such as being formed on an independent transducer bracket 710 (the transducer bracket 710 is an integrally formed bracket structure). When the transducer bracket 710 includes a connected first bracket 711 and a second bracket 712, taking the transducer being mounted on the second bracket 712 as an example, in this case, the slot 720 is formed on the first bracket 711; or, the slot 720 is formed on the second bracket 712; or, the first bracket 711 and the second bracket 712 enclose each other to form the slot 720.

[0115] To improve the stability of the second magnetic component 820 and the fixing part 819 engaging in the slot 720, the radial dimension of the portion of the edge of the second magnetic component 820 that engages in the slot 720 is 2.1 mm to 8 mm. It is understood that if the value is less than 2 mm, the second magnetic component 820 is prone to disengaging from the slot; if the value is greater than 8 mm, it is easy to cause waste and require increasing the size of the transducer bracket 710.

[0116] There are many possible forms in which the first bracket 711 and the second bracket 712 enclose and form the slot 720. Examples are given below.

[0117] In some embodiments, such as Figure 22 As shown, the transducer bracket 710 includes a first bracket 711 and a second bracket 712 connected together, and the transducer is directly or indirectly installed on the second bracket 712; the slot 720 includes a first slot portion 721 and a second slot portion 722, the first slot portion 721 is formed on the first bracket 711, the second slot portion 722 is formed on the second bracket 712, and the first slot portion 721 and the second slot portion 722 surround the slot 720.

[0118] In other embodiments, such as Figure 6 , 10 As shown, the transducer bracket 710 includes a first bracket 711 and a second bracket 712 connected together, and the transducer is mounted on the second bracket 712; a slot 720 is formed in one of the first bracket 711 and the second bracket 712, and the other of the first bracket 711 and the second bracket 712 covers the slot opening 723 of the slot 720.

[0119] In some embodiments, the transducer bracket 710 includes a first bracket 711 and a second bracket 712, with the transducer mounted on the second bracket 712. The first bracket 711 has a slot 720 and further includes a first connecting structure 713 disposed adjacent to the slot 720. The second bracket 712 includes a second connecting structure 714 and a limiting portion 715 connected thereto. The second connecting structure 714 is connected to the first connecting structure 713. The limiting portion 715 is disposed corresponding to the second magnetic element 820 and is used to press against the portion of the sealing telescopic tube 810 on which the second magnetic element 820 is mounted, thereby limiting the second magnetic element 820 to the transducer bracket 710.

[0120] In this embodiment, the first connecting structure 713 and the second connecting structure can be connected in many ways, such as by fasteners like screws or by snap-fit ​​connections. The first connecting structure 713 and the second connecting structure 714 can also take many forms, such as being plate-shaped, block-shaped, column-shaped, etc.

[0121] In some other embodiments, the transducer bracket 710 includes a first bracket 711 and a second bracket 712, with the transducer mounted on the second bracket 712. The second bracket 712 has a slot 720 and also includes a second connecting structure 714, which is disposed adjacent to the slot 720. The first bracket 711 includes a first connecting structure 713 and a limiting portion 715. The first connecting structure 713 is connected to the second connecting structure 714, and the limiting portion 715 is disposed corresponding to the second magnetic element 820. The limiting portion 715 is used to press against the portion of the sealing telescopic tube 810 where the second magnetic element 820 is mounted, thereby limiting the second magnetic element 820 to the transducer bracket 710. The specific implementation of this embodiment can be referred to the embodiments above, except that the positions of the limiting portion 715 (belonging to the first bracket 711) and the slot 720 (belonging to the second bracket 712) are interchanged.

[0122] There can be many specific forms of the first bracket 711 and the second bracket 712 in this application, and no special limitation is made here. Specific examples are given below for illustration, and more detailed descriptions will be provided in the specific usage conditions (executives) in the following embodiments. In some embodiments, the first bracket 711 can be a component used independently. In other embodiments, the first bracket 711 can be a component shared (reused) with other components, such as being integrally formed with the motor housing in the drive mechanism 900. The second bracket 712 can be a component used independently in some embodiments, and can also be a component shared (reused) with other components in other embodiments. For example, it can be a guide rail structure or track structure for sliding the mounting bracket 716 (fixed mounting of the ultrasonic transducer 750).

[0123] The slot 720 can take many forms. The specific structure and form of the slot 720 are illustrated below with examples. In some embodiments, the transducer bracket 710 further includes a clearance portion 725 communicating with the slot 720. The clearance portion 725 is at least used to clear the sealing telescopic tube 810. The clearance portion 725 can take many forms. For example, it can have a clearance space 727 (which can be a clearance notch). The clearance notch connects the slot 720 to the outside, allowing components to enter the slot 720 through the clearance portion 725, or providing clearance space 727 for components connected to the slot 720.

[0124] In some embodiments, to improve the stability of the engagement between the second magnetic element 820 and the fixing part 819, the fixing part 819 includes an annular bottom 81c and annular side portions 81d connected to both sides of the annular bottom 81c. The two annular side portions 81d and the annular bottom 81c form a mounting groove 813. The annular bottom 81c, at least a portion of the annular side portions 81d, and at least a portion of the edge of the second magnetic element 820 are engaged in the slot 720. The fixing part 819 is part of the sealing telescopic tube 810 and is made of a flexible, soft, or elastic material, while the second magnetic element 820 is made of a rigid material. In this embodiment, the engagement method involves the rigid element and its two soft components simultaneously engaging in the slot 720. Because flexible, soft, or elastic materials will undergo elastic deformation when compressed, they will simultaneously exert a reaction force of the same magnitude on the compression force. When the fixing part 819 and the second magnetic component 820 are inserted into the slot 720, the annular bottom 81c and the annular side parts 81d on both sides undergo elastic deformation and exert a reaction force on the slot wall of the slot 720, which greatly improves the installation stability of the fixing part 819 and the second magnetic component 820.

[0125] In some embodiments, to further improve the stability of the card slot 720 in holding the fixing part 819 and the second magnetic member 820, a support rib 740 is provided on the inner wall of the card slot 720, and the support rib 740 abuts against the peripheral side surface of the fixing part 819. Specifically, in this embodiment, the support rib 740 can take many forms, such as block-shaped, strip-shaped, or multiple protrusions arranged according to a certain rule, etc., and no special limitation is made here. In some embodiments, to improve the stability of the support rib 740 in supporting the fixing part 819, the surface of the support rib 740 facing the fixing part 819 is set as the support surface 741, and the overall shape of the support surface 741 is adapted to the shape of the peripheral side surface of the fixing part 819. The support rib 740 is provided corresponding to the peripheral side wall of the second magnetic member 820. When the second magnetic member 820 is inserted into the card slot 720, the support rib 740 exerts pressure on the fixing part 819 and the second magnetic member 820 at the corresponding positions. The support rib 740 ensures that the peripheral sidewalls of the second magnetic component 820 and the fixing part 819 are abutted against each other. Simultaneously, since the support surface area 741 of the support rib 740 is smaller than the area of ​​the bottom of the slot 720, under the same pressure, the support rib 740 can provide greater pressure than the bottom of the slot 720, allowing the fixing part 819 and the second magnetic component 820 to be more firmly secured, resulting in higher stability.

[0126] In some embodiments, the sealing telescopic tube 810 includes a deformable section 815, an installation section 817, and a connecting section 816 connecting the deformable section 815 and the installation section 817. The installation section 817 forms a fixing portion 819. A second magnetic element 820 is installed on the installation section 817. The maximum outer diameter of the connecting section 816 is smaller than the maximum outer diameter of the deformable section 815 and the installation section 817. At least a portion of the installation section 817 engages with a slot 720, at least a portion of the connecting section 816 is disposed in a clearance portion 725, and the deformable section 815 is located outside the slot 720. Thus, by segmenting the sealing telescopic tube 810 and placing the deformable section 815 outside the slot 720, it can be ensured that the deformation of the deformable section 815 is not affected by the slot 720, thus ensuring the deformation efficiency (volume change per unit length) of the sealing telescopic tube 810. Thus, by setting the radial dimension of the connecting section 816 to be the smallest among the three parts and setting it to correspond to the relief part 725, the connecting part can be supported by the relief part 725. At the same time, the space is fully and reasonably utilized (the connecting section 816 is recessed relative to the deformation section 815 and the mounting section 817, and the side wall of the relief part 725 protrudes and fits into the recess), improving the locking stability of the mounting section 817 (when the sealing expansion tube 810 is subjected to axial force, the cooperation between the connecting section 816 and the relief part 725 can share the load).

[0127] In some embodiments, the transducer assembly 700 further includes a guide rod 730, the two ends of which are connected to the inner wall of the housing 600, and the length direction of the guide rod 730 is aligned with the depth direction of the connecting hole 612; the transducer bracket 710 is movably mounted on the guide rod 730 so that the transducer assembly 700 is movably disposed within the mounting cavity 610. Specifically, in this embodiment, the cross-sectional shape of the guide rod 730 can be various, such as circular, elliptical, square, triangular, plum blossom-shaped, etc., and no special limitation is made here; a circular cross-section is taken as an example.

[0128] There are many ways to mount the guide rod 730 onto the housing 600. For example, a locking hole 652 can be provided on the inner wall of the housing 600, and both ends of the guide rod 730 can be positioned within the locking hole 652. The locking hole 652 can be directly formed on the inner wall of the housing 600, or it can be composed of multiple components. For example, a retaining groove 651 can be formed on the inner wall of the upper housing 650, and a retaining rib 661 can be provided on the lower housing 660 at a position corresponding to the retaining groove 651. When the retaining rib 661 is inserted into the retaining groove 651 along its length, a locking hole 652 is formed between the end of the retaining groove 651 and the free end of the retaining rib 661.

[0129] It is worth noting that in some other embodiments, the retaining groove 651 can be formed on the lower shell 660, while the retaining rib 661 can be formed on the upper shell 650. Specifically, it can be set according to the actual working conditions.

[0130] In this way, by using the retaining rib 661 and the retaining groove 651 to form the retaining hole 652, during the assembly process, the guide rod 730 can be placed at the end of the retaining groove 651 first, and then the retaining rib 661 can be inserted into the retaining groove 651. This not only allows the guide rod 730 to easily enter the retaining groove 651 (inserted into the retaining hole 652), but also allows the guide rod 730 to be abutted by the end of the retaining rib 661, thereby improving the installation stability of the guide rod 730.

[0131] Regarding the installation method at both ends of the guide rod 730, it can be the same or different, as long as at least one end's locking hole 652 is formed by a combination of the locking groove 651 and the locking rib 661. The number of guide rods 730 can be one, two, or three, etc., without special limitation. Taking two guide rods 730 as an example, they are located on opposite sides of the ultrasonic transducer 750. The guide rod 730 can be installed on the first bracket 711 or the second bracket 712; taking the first bracket 711 as an example. There are many ways for the guide rod 730 to cooperate with the transducer bracket 710. For example, the transducer bracket 710 can have a guide channel for the guide rod 730 to pass through, allowing the transducer bracket 710 to move along the guide rod 730.

[0132] In some embodiments, to improve the stability of the guide rod 730 installation, the thickness of the retaining rib 661 is set to be greater than the groove depth of the retaining groove 651. When the retaining rib 661 is inserted into the retaining groove 651, a portion of the retaining rib 661 protrudes out of the groove 651, thereby significantly increasing the area of ​​the retaining rib 661 used to abut against the guide rod 730, which is beneficial to improving the stability of the guide rod 730 installation. In some embodiments, to further increase the installation stability of the guide rod 730, the end face shape of the free end of the retaining rib 661 is adapted to the outer surface shape of the guide rod 730, thereby increasing the contact area between the retaining rib 661 and the guide rod 730. In some embodiments, in order to increase the connection stability between the retaining rib 661 and the retaining groove 651, a latch is provided at the bottom of the retaining groove 651 (or on the side of the retaining rib 661 facing the bottom of the retaining groove 651), and a buckle is provided on the side of the retaining rib 661 facing the bottom of the retaining groove 651 (or on the bottom of the retaining groove 651). When the retaining rib 661 is inserted into the preset position of the retaining groove 651, the buckle engages with the buckle, thereby fixing the retaining rib 661 and the retaining groove 651.

[0133] In some embodiments, to improve the load-bearing capacity of the housing 600 at the location of the guide rod 730, one end of the guide rod 730 is installed at a position corresponding to the mounting box 668 of the electronic control board 669, which is located outside the housing 600. A mating structure is provided on the outer wall of the housing 600 corresponding to the mounting position of the mounting box 668. At the location where the mating structure is provided, the wall thickness of the housing 600 is greater than at other locations, which helps to improve the load-bearing capacity of the housing 600 at that location. In a specific example, at least a portion of the retaining rib 661 can be positioned opposite to the mounting box 668 of the electronic control board (for providing the mating structure of the mounting box 668).

[0134] In some embodiments, the sealing telescopic tube 810 further has a self-closing end 812, with the fixing part 819 and the second magnetic element 820 located at the self-closing end 812; the cutter head 20 further includes a balancing telescopic tube 830, one end of which is connected to the inner sidewall of the housing 600, and the other end is connected to the transducer assembly 700 and / or the sealing telescopic tube 810; the sealing telescopic tube 810 and the balancing telescopic tube 830 are respectively disposed on both sides of the transducer assembly 700.

[0135] Here is another example of applying the sealing connection assembly 800 to an embodiment of the blade head 20. A blade head 20 is used in a skin treatment device. The skin treatment device includes a handheld component 10 detachably connected to the blade head 20. The handheld component 10 includes a drive assembly 210, a drive shaft 250 tractively connected to the drive assembly 210, and a first magnetic element 260 disposed at the drive end of the drive shaft 250. The blade head 20 includes: a housing 600 having a mounting cavity 610 and a communicating hole 612 penetrating through the side wall of the housing 600; a transducer assembly 700 disposed within the mounting cavity 610; and a sealing connection assembly 800 including a sealing telescopic tube 810 and a second magnetic element 820 fixedly installed within the sealing telescopic tube 810. A fixing portion 819 is formed on the sealing telescopic tube 810 corresponding to the second magnetic element 820. The fixing part 819 has a self-sealing structure and is fixedly connected to the transducer assembly 700. The sealing telescopic tube 810 has an open end 811, which is sealed to the housing 600 and communicates with the connecting hole 612. The housing 600 is detachably mounted on the handheld part 10. The drive shaft 250 extends into the sealing telescopic tube 810 through the connecting hole 612 and the open end 811 and is magnetically connected to the second magnetic element 820 to drive the transducer assembly 700 to move. In this embodiment, the working principle of the technical solution is the same as that in the above embodiment, and will not be repeated here. The difference is that the technical solution disclosed in this embodiment applies the sealing connection assembly 800 to the cutter head 20.

[0136] Regarding the balancing component, its working principle is that it can deform under the drive of the transducer assembly 700, thereby buffering the changes in hydraulic pressure within the mounting cavity 610 and reducing fluid fluctuations. It can take many forms, including a deformable tubular structure such as a deformable telescopic tube. Taking a telescopic tube as an example, to easily distinguish it from the sealed telescopic tube 810, the balancing component will be referred to as the balancing telescopic tube 830 in later embodiments. The balancing telescopic tube 830 can be independently installed with the sealed telescopic tube 810 or integrated into the sealed telescopic tube 810. The following descriptions will explain its integration into different embodiments for different operating conditions.

[0137] Please see Figures 5 to 14 In some embodiments, to better balance the hydraulic changes caused by the movement of the transducer assembly 700, a balancing telescopic tube 830 is provided within the housing 600. Specifically, a blade 20 for a skin treatment device is proposed. The blade 20 includes: a housing 600 having a mounting cavity 610 and a communicating hole 612, the communicating hole 612 penetrating the side wall of the housing 600; a transducer assembly 700 movably disposed within the mounting cavity 610; and a sealing telescopic tube 810 disposed on one side of the transducer assembly 700, the sealing telescopic tube 810 having an open end 811 and a fixed end 81e (that is, one end of the sealing telescopic tube 810 is an open end, and the other end is a fixed end 81e; the fixed end 81e can take many forms, as long as it is fixedly connected to the transducer assembly 700; in some embodiments, it can correspond to the fixed part 819 in the above embodiments), the open end 811 being sealed to the communicating hole 612. Two points are provided to allow the interior of the sealing telescopic tube 810 to communicate with the outside through the open end 811 and / or the connecting hole 612, and the fixed end to be connected to the transducer assembly 700; a balancing telescopic tube 830 is provided on the other side of the transducer assembly 700. The balancing telescopic tube 830 is disposed inside the housing 600 and has a first end 831 and a second end 832. The first end 831 is connected to the inner wall of the housing 600, and the second end 832 is connected to the transducer assembly 700 and / or the sealing telescopic tube 810. The balancing telescopic tube 830 communicates with the outside of the housing 600. The balancing telescopic tube 830 is located on the side of the transducer assembly 700 opposite to the sealing telescopic tube 810, so that when one of the sealing telescopic tube 810 and the balancing telescopic tube 830 is compressed during the movement of the transducer assembly 700, the other is stretched.

[0138] The method and effect of sealing the open end 811 to the connecting hole 612 can be referred to the above embodiment, and will not be repeated here.

[0139] It is understood that the solutions described in this section are not limited to whether the fixed end 81e must be a self-sealing end. That is to say, the fixed end 81e can be an open end with an opening, in which case it is sealed and connected to the transducer assembly 700. Of course, the fixed end 81e can also be a self-sealing end 812, in which case it is only necessary for the fixed end 81e to be fixedly connected to the transducer assembly 700. It is also not limited whether a second magnetic element is provided on the inner side of the fixed end 81e. That is to say, a second magnetic element can be provided on the inner side of the fixed end 81e, in which case the fixed end 81e can form a fixing part corresponding to the second magnetic element. This result is basically the same as the relevant content in the previous section, and will not be elaborated here. The inner side of the fixed end 81e may also not have a second magnetic element. In this case, the second magnetic element can be provided on a bracket outside the fixed end 81e, or other structures can be provided on the inner side of the fixed end 81e to form a detachable method with the drive shaft, such as Velcro or a negative pressure adsorption structure.

[0140] Specifically, the form of the balancing telescopic tube 830 can be varied, as long as it can be stretched and compressed when subjected to external forces. No special limitation is made here, taking a corrugated pipe as an example. The "balancing" in the balancing telescopic tube 830 refers to the fact that it balances the water pressure changes caused by the movement of the transducer assembly 700 through changes in its own volume, and / or, it is used to balance the volume changes (changes in the available space of the liquid in the mounting cavity 610) caused by the expansion and contraction of the sealed telescopic tube 810.

[0141] There are many ways to fix the first end 831 of the balance telescopic tube 830 to the inner wall of the housing 600, such as screws, clips, adhesive, snap-fit ​​structures, or other connection structures. No special limitation is made here.

[0142] Specifically, the connection method can be set according to the shape of the first end 831. When the first end 831 is a self-sealing structure, it can be simply referred to as a closed end. At this time, there is no need to consider the sealing state of the first end 831, only the connection. When the first end 831 is a structure with an opening, the first end 831 needs to be sealed to the inner wall of the housing 600 or other structures to ensure that the liquid in the mounting cavity 610 cannot enter the balance telescopic tube 830 from the first end 831.

[0143] There are many ways to connect the second end 832 to the transducer assembly 700 and / or the sealing telescopic tube 810, such as by screws, clips, adhesives, heat fusion, magnetic adsorption, etc., and no special limitation is made here.

[0144] Of course, in some embodiments, the balance telescopic tube 830 may also be integrally formed with the support of the sealing telescopic tube 810 or the transducer assembly 700.

[0145] Specifically, there are several ways in which the balance telescopic tube 830 can be connected to the outside of the housing 600. For example, it can be connected to the outside of the housing 600 by connecting with the sealed telescopic tube 810, or by opening a vent hole 613 on the side wall of the housing 600 and then sealing the first end 831 to the vent hole 613, thereby achieving the connection between the balance telescopic tube 830 and the outside of the housing 600. Of course, in some embodiments, the first end 831 can also be connected to the outside of the housing 600 by means of other channels (such as providing a connecting pipe).

[0146] Specifically, by placing the sealing telescopic tube 810 and the balancing telescopic tube 830 on opposite sides of the transducer assembly 700, and by configuring both the sealing telescopic tube 810 and the balancing telescopic tube 830 to communicate with the external environment, during the movement of the transducer assembly 700, one of the sealing telescopic tube 810 and the balancing telescopic tube 830 is compressed while the other is stretched. Since both are connected to the external environment, the internal pressure of both is comparable to the pressure difference within the mounting cavity 610. When the transducer assembly 700 moves a certain distance, the deformation of both is also comparable, resulting in a very small change in the volume of the liquid contained within the mounting cavity 610 (the volume occupied by the compressed telescopic tube decreases, and the volume occupied by the stretched telescopic tube increases, with the decrease and increase in volume being comparable). This avoids violent fluctuations in the liquid during the movement of the transducer assembly 700, thereby reducing the pressure changes and oscillations of the liquid filling the housing. This reduces the risk of damage to the acoustic membrane 951 and also helps to reduce bubble generation, thus improving the ultrasonic energy transfer effect.

[0147] In some embodiments, the second end 832 may be an open end with an opening, in which case it may be sealed to the transducer assembly 700 and / or the fixed end.

[0148] In some embodiments, the second end 832 can be a self-sealing end. The self-sealing end 812 refers to an end with a self-sealing structure, the definition of which is given above. Thus, in this case, there is no need to additionally construct a sealing structure between the second end and the transducer assembly; only the connection needs to be considered.

[0149] In some embodiments, the fixed end 812 is a self-closing end, and the second end 832 is a self-closing end.

[0150] Thus, since the fixing part 819 and / or the second end 832 are self-sealing ends 812, the position is already sealed before being installed into the housing 600, eliminating the need for sealing after installation. This reduces the number of sealing steps required in the confined space of the mounting cavity 610, thereby significantly improving the assembly efficiency of the cutter head 20 and increasing its productivity.

[0151] In some embodiments, when the fixed end 812 and the second end 832 are both self-sealing ends, the first end is an open end, and a vent 613 is formed on the side wall of the housing 600. The first end 831 is sealed and connected to the vent 613 to achieve communication between the balance telescopic tube 830 and the outside of the housing 600. In some embodiments, to further reduce the hydraulic changes caused by the movement of the transducer assembly 700, the sealed telescopic tube 810 and the balance telescopic tube 830 are symmetrical about the transducer assembly 700. In this embodiment, the symmetrical position of the sealed telescopic tube 810 and the balance telescopic tube 830 about the transducer assembly 700 means that they are located on opposite sides of the transducer assembly 700. During the movement of the transducer assembly 700, the distance the transducer assembly 700 moves is equivalent to the change in length (compression or extension) of the sealed telescopic tube 810 and the balance telescopic tube 830. In this way, the change in the available liquid space within the mounting cavity 610 can be further reduced, thereby further reducing the hydraulic changes caused by the movement of the transducer assembly 700.

[0152] The following example illustrates how the 830 balanced telescopic tube connects to the external environment.

[0153] In some embodiments, to improve the convenience of communication and avoid making additional openings on the side wall of the housing 600, the balance telescopic tube 830 communicates with the outside by communicating with the sealed telescopic tube 810. The balance telescopic tube 830 can communicate with the external environment in various ways, including direct communication and indirect communication.

[0154] Regarding direct connection, for example, the second end 832 is connected to the fixed end 81e, and the second end 832 is in communication with the fixed end 81e, so that the balance telescopic tube 830 is in communication with the outside of the housing 600 through the sealing telescopic tube 810 and the connecting hole 612. In this case, optionally, a second magnetic element and a fixing part can be provided at the connection between the second end 832 and the fixed end, and its specific structure can be as described above; in this case, optionally, the sealing telescopic tube 810 and the balance telescopic tube 830 can be an integrally formed structure.

[0155] Regarding indirect connectivity, for example, refer to Figure 8 and Figure 15 The cutter head 20 also includes a pipe connection structure 840, which is hollow and has a connection channel 841 inside. Both ends of the pipe connection structure 840 are connected to a sealing telescopic tube 810 and a balancing telescopic tube 830, respectively, and the connection channel 841 connects the sealing telescopic tube 810 and the balancing telescopic tube 830. The pipe connection structure 840 can take many forms; it can be a pipeline or a hollow pipe connection structure.

[0156] In some embodiments, to ensure that the gas inside the balance telescopic tube 830 can be directly replaced by the external environment to obtain gas closer to room temperature, a vent 613 is provided on the side wall of the housing 600. The vent 613 and the connecting hole 612 are respectively located on both sides of the transducer assembly 700, and the vent 613 penetrates the side wall of the housing 600. The first end 831 is open and sealed to the vent 613, so that the interior of the balance telescopic tube 830 communicates with the outside through the opening of the first end 831 and / or the vent 613. It is worth noting that the specific form in which the balance telescopic tube 830 communicates with the outside of the housing 600 is not limited here, and the specific form can be referred to the connecting channel 868 in the above embodiment.

[0157] Specifically, by extending the vent 613 through the side wall of the housing 600 and sealing the first end 831 to the vent 613, the interior of the balance telescopic tube 830 is connected to the exterior of the housing 600, allowing direct gas exchange between the balance telescopic tube 830 and the exterior of the housing 600. This facilitates smooth gas entry and exit from the balance telescopic tube 830, ensuring smooth deformation of the balance telescopic tube 830 during the movement of the transducer assembly 700.

[0158] In some embodiments, to ensure that the first end 831 of the balance telescopic tube 830 can be reliably sealed to the vent 613, the cutter head 20 further includes a sealing connection structure 850, which is used to seal the end of the balance telescopic tube 830 to the side wall of the housing 600. The sealing connection structure 850 has a vent 854 connecting the interior and exterior of the balance telescopic tube 830. A connecting channel 868 connecting the interior of the balance telescopic tube 830 and the exterior of the housing 600 is formed at the sealing connection of the sealing connection structure 850. The connecting channel 868 can take many forms, such as being composed of a single component (vent 854 or vent 613), or being formed by a combination of multiple components (such as gas passing through vent 854 and vent 613 in sequence). The sealing connection structure 850 can take many forms, which will not be detailed here, but the specific structure can be found in the following embodiments. To ensure that gas can smoothly enter and exit the balance telescopic tube 830, some parameters of the connecting channel 868 and the balance telescopic tube 830 are defined. For example, the ratio of the equivalent cross-sectional area of ​​the connecting channel 868 to its length is 0.6-0.81, and can be 0.69, 0.71, 0.72, 0.75, 0.78, etc. In this embodiment, the equivalent cross-sectional area refers to the situation where the cross-sectional area is not completely consistent at different locations. It can be understood as the ratio of the amount of gas passing through the connecting channel 868 per unit time to the unit time, under a constant pressure difference. The ratio of the equivalent cross-sectional area of ​​the connecting channel 868 to its length should not be too large or too small. When this ratio is too large, exceeding 0.81, it indicates that the equivalent cross-sectional area is too large relative to the length. In this case, dust, insects, moisture, etc., from the external environment can easily enter the balance expansion tube 830 through the connecting channel 868. When this ratio is too small, exceeding 0.6, it indicates that the equivalent cross-sectional area is too small relative to the length. Due to the obstruction of the gas flow by the inner wall of the connecting channel 868, gas may not be able to pass smoothly through the connecting channel 868, affecting the smooth deformation of the balance expansion tube 830. The length of the connecting channel 868 is 3.5mm-6.5mm, and / or the equivalent cross-sectional area of ​​the connecting channel 868 is 2.6mm. 2 -4.6mm 2 In this embodiment, the length of the connecting channel 868 can be 3.6 mm, 3.9 mm, 4.5 mm, 4.8 mm, 4.9 mm, 5.0 mm, 5.1 mm, 5.2 mm, 5.5 mm, 5.8 mm, 6.2 mm, etc. The equivalent cross-sectional area of ​​the connecting channel 868 can be 2.8 mm². 2 2.9 mm 2 3.1 mm 2 3.3 mm 2 3.5 mm 23.6 mm 2 3.7 mm 2 3.9 mm 2 4.1mm 2 4.3 mm 2 Similarly, the length of the connecting channel 868 cannot be too long (the equivalent cross-sectional area of ​​the connecting channel 868 cannot be too small), nor can it be too short (nor too small). If it is too long, exceeding 6.5 mm (less than 2.6 mm), it will be unsuitable. 2 Due to the obstruction of the gas flow by the inner wall of the connecting channel 868, the gas may not be able to pass through the connecting channel 868 smoothly, affecting the smooth deformation of the balance expansion tube 830; if it is too short (less than 3.5 mm) or greater than 4.6 mm... 2 At that time, dust, insects, moisture and other substances in the external environment can easily enter the balance expansion tube 830 through the connecting channel 868.

[0159] In some embodiments, to further improve the smoothness of gas entry and exit from the balance telescopic tube 830, the ratio of the equivalent cross-sectional area of ​​the connecting channel 868 to the equivalent cross-sectional area of ​​the balance telescopic tube 830 is 3 / 109-6 / 109; and / or, the ratio of the equivalent diameter of the connecting channel 868 to the equivalent diameter of the balance telescopic tube 830 is 1 / 10-2 / 5. Specifically, in this embodiment, the equivalent cross-sectional area of ​​the balance telescopic tube 830 refers to the ratio of the gas volume passing through the balance telescopic tube 830 per unit time to the unit time when the gas pressure difference between the two ends of the balance telescopic tube 830 is constant under natural conditions. The ratio of the equivalent cross-sectional area of ​​the connecting channel 868 to the equivalent cross-sectional area of ​​the balance telescopic tube 830 should not be too large or too small. When this ratio is greater than 6 / 109, it indicates that the equivalent cross-sectional area of ​​the connecting channel 868 is too large compared to the equivalent cross-sectional area of ​​the balance expansion tube 830, making it easier for dust and water from the external environment to enter the balance expansion tube 830. When this ratio is less than 3 / 109, it indicates that the equivalent cross-sectional area of ​​the connecting channel 868 is too small compared to the equivalent cross-sectional area of ​​the balance expansion tube 830, potentially resulting in the connecting channel 868 being unable to timely discharge the amount of gas required for the deformation of the balance expansion tube 830. The equivalent cross-sectional area of ​​the balance expansion tube 830 is 67.2 mm². 2 -107.2 mm 2The ratio of the equivalent diameter of the connecting channel 868 to the equivalent diameter of the balance telescopic tube 830 is 1 / 10 to 2 / 5. The equivalent diameter of the balance telescopic tube 830 can be understood as its average diameter under natural conditions, and the equivalent diameter of the connecting channel 868 can be understood as the average diameter of the connecting channel 868. This ratio should not be too large or too small. When the ratio is greater than 2 / 5, it indicates that the ratio of the diameter of the connecting channel 868 to the diameter of the balance telescopic tube 830 is too high, and the aperture of the connecting channel 868 is too large, making it easy for dust from the external environment to enter. When the ratio is less than 1 / 10, it indicates that the ratio of the diameter of the connecting channel 868 to the diameter of the balance telescopic tube 830 is too low, and the aperture of the connecting channel 868 is too small, which can easily lead to poor exhaust and intake.

[0160] Of course, the ratio settings above are related to the moving speed of the transducer assembly 700. It is worth noting that the transducer assembly 700 is used to output ultrasound waves to human skin, and its moving speed cannot be extremely fast or extremely slow. It is typically 5mm / s-11mm / s, and can be 6mm / s, 7mm / s, 8mm / s, 9mm / s, or 10mm / s. When the moving speed of the transducer assembly 700 exceeds 11mm / s, the ultrasound output is insufficient, affecting the therapeutic effect; when the moving speed of the transducer assembly 700 is less than 5mm / s, the ultrasound output is excessive, affecting the efficiency of the therapeutic effect.

[0161] It is worth noting that the vent 854 significantly increases the stability of the liquid within the mounting cavity 610. Specifically, as the transducer assembly 700 moves along the length of the handheld component 10, the ultrasonic diaphragm located at the acoustic outlet 611 on the housing 600 will bulge and recede as the transducer assembly 700 moves. With other factors remaining constant, before the vent 854 is installed, the maximum positional difference between the bulge and recede of the ultrasonic diaphragm is 0.3 mm to 0.5 mm; after the vent 854 is installed, the maximum positional difference between the bulge and recede of the ultrasonic diaphragm is 0 mm to 0.15 mm.

[0162] In some embodiments, to improve the sealing effect of the first end 831, a sealing flange 833 is provided around the opening of the first end 831. The cutter head 20 also includes a sealing connection structure 850, which clamps the sealing flange 833 for detachable connection with the housing 600, or clamps the sealing flange 833 between the sealing connection structure 850 and the housing 600. Optionally, the sealing connection structure 850 has a vent hole 854 to allow the interior of the balance telescopic tube 830 to communicate with the outside through the opening of the first end 831 and / or the vent hole 613.

[0163] Specifically, in this embodiment, the sealing flange 833 can take several forms. For example, it can extend radially outward (outside the tube) along the edge of the end of the self-balancing telescopic tube 830. In this case, the radial dimension of the sealing flange 833 is larger than the radial dimension of the self-balancing telescopic tube 830. Of course, in other embodiments, the sealing flange 833 can also extend radially inward (inside the tube) along the edge of the end of the self-balancing telescopic tube 830. In this case, the radial dimension of the sealing flange 833 is smaller than the radial dimension of the self-balancing telescopic tube 830.

[0164] In this embodiment, the sealing connection structure 850 clamps the sealing flange 833 and then connects it to the housing 600. Alternatively, the sealing connection structure 850 directly clamps the sealing flange 833 and the side wall of the housing 600, and fits the sealing flange 833 against the side wall of the housing 600. Simultaneously, the sealing connection structure 850 also has a vent 854, allowing the balance telescopic tube 830 to communicate with the outside through the opening at the first end 831 and / or the vent 613.

[0165] In some embodiments, in order to improve the sealing connection between the first end 831 of the balance telescopic tube 830 and the housing 600, a sealing flange 834 is provided on the side of the sealing flange 833 facing the inner wall of the housing 600. The sealing flange 834 is arranged in an annular shape, and the sealing flange 833 has at least two sealing flanges 834 with different radial dimensions. The sealing flange 834 with a larger radial dimension is sleeved on the sealing flange 834 with a smaller radial dimension, and a sealing groove 835 is formed between the two sealing flanges 834.

[0166] Specifically, the sealing flange 834 can undergo elastic deformation. When the sealing flange 833 is compressed, a more complex contact path can be formed between the sealing flange 833 and its mating surface, thereby increasing the difficulty for fluid to pass between the mating surfaces and improving the sealing effect. When the sealing flange 834 is set in an annular shape, and the larger diameter first flange is fitted over the smaller diameter second flange, a sealing groove 835 is formed between the first and second flanges. This makes the mating surface path between the sealing flange 833 and the inner wall of the housing 600, or between the sealing flange 833 and the connector 853, more complex, significantly improving the sealing effect of the sealing flange 833. In some embodiments, to further improve the sealing effect, sealant can be provided in the sealing groove 835.

[0167] The specific design of the sealing connection structure 850 is only briefly introduced here. For the specific structure, please refer to the detailed embodiments later (see the section on sealing connection structure 850).

[0168] The first option is briefly described, such as... Figure 15As shown, the sealing connection structure 850 includes a clamping member 851, a fastener 852, and a connector 853. The clamping member 851 includes a first connecting portion 855 and a clamping portion 856 connected to the first connecting portion 855. The fastener 852 includes a second connecting portion 857 and a clamping portion 858 connected to the second connecting portion 857. The connector 853 includes a third connecting portion 859 and an extension portion 85a connected to the third connecting portion 859. The third connecting portion 859 is used for fixed connection with the side wall of the housing 600. The first connecting portion 855 is fastened to the second connecting portion 857. The clamping portion 856 and the clamping portion 858 clamp the extension portion 85a and the sealing flange 833. Alternatively, the clamping portion 856 and the clamping portion 858 clamp the extension portion 85a, the sealing flange 833, and the side wall of the housing 600.

[0169] The second embodiment is described in detail. The sealing connection structure 850 includes a clamping member 851 and a fastener 852. The clamping member 851 has an air vent 854. One of the clamping member 851 and the fastener 852 is located outside the housing 600, and the other is located inside the housing 600. The clamping member 851 includes a first connecting portion 855 and a clamping portion 856 connected to the first connecting portion 855. The fastener 852 includes a second connecting portion 857 and a clamping portion 858 connected to the second connecting portion 857. The first connecting portion 855 passes through the through hole structure 862 and is fastened to the second connecting portion 857. The clamping portion 856 and the clamping portion 858 clamp the side wall of the housing 600 and the sealing flange 833.

[0170] Please see Figures 5 to 14 In other embodiments, in order to improve the sealing effect of the sealing telescopic tube 810 and the balancing telescopic tube 830, reduce the need for further sealing of components already installed in the mounting cavity 610, reduce the process steps for sealing components installed in the housing 600, and improve the production efficiency of the cutter head 20, this application further proposes some related structures of the sealing telescopic tube 810 and the balancing telescopic tube 830, and incorporates these solutions into specific embodiments for description.

[0171] Specifically, this application further proposes a blade 20 for a skin treatment device, the blade 20 comprising: a housing 600 having a mounting cavity 610 and a communicating hole 612 penetrating through the side wall of the housing 600; a transducer assembly 700 movably disposed within the mounting cavity 610; and an integrally formed telescopic tube including a sealing telescopic tube 810 and a balancing telescopic tube 830 connected to the sealing telescopic tube 810, the telescopic tube being fixedly connected to the transducer assembly 700 at the connection between the sealing telescopic tube 810 and the balancing telescopic tube 830. The balance telescopic tube 830 is connected at the connection point or forms a self-sealing structure; the sealing telescopic tube 810 and the balance telescopic tube 830 are located on both sides of the transducer assembly 700, respectively. The end of the sealing telescopic tube 810 away from the connection point is an open end 811, which is sealed to the housing 600 and connected to the connecting hole 612. The end of the balance telescopic tube 830 away from the connection point is connected to the inner wall of the housing 600. The transducer assembly 700 is used to drive the telescopic tube to move. During the movement of the transducer assembly 700, when one of the sealing telescopic tube 810 and the balance telescopic tube 830 is compressed, the other is stretched.

[0172] Specifically, compared to the previous embodiments, in this embodiment, the telescopic tubes are integrally formed, meaning that the sealing telescopic tube 810 and the balancing telescopic tube 830 are integrally formed. There are many ways to achieve this integral formation, such as one-time injection molding, two-time injection molding, or even later integral molding through hot melting, welding, or other methods. Specifically, when the sealing telescopic tube 810 and the balancing telescopic tube 830 are connected at the connection point, the gas inside the balancing telescopic tube 830 can freely exchange gases with the gas inside the sealing telescopic tube 810. Since the sealing telescopic tube 810 is connected to the outside of the housing 600 through the connecting hole 612, the balancing telescopic tube 830 is indirectly connected to the outside of the housing 600, which facilitates the smooth deformation of the balancing telescopic tube 830. The self-sealing structure can be referred to the explanation in the above embodiments. If a self-sealing structure is formed at the connection point, it means that the connection point seals and isolates the inside of the telescopic tube from the surrounding environment, and the liquid in the mounting cavity 610 cannot enter the telescopic tube from the connection point.

[0173] In this embodiment, by distributing the integrally formed telescopic tubes on opposite sides of the transducer assembly 700, during the movement of the transducer assembly 700, when a portion of the telescopic tube on one side of the transducer assembly 700 is compressed, a portion of the telescopic tube on the other side of the transducer assembly 700 will be stretched. This significantly reduces the liquid fluctuations caused by the deformation of the telescopic tubes during the movement of the transducer assembly 700. At the same time, by making the telescopic tubes on opposite sides of the transducer assembly 700 an integral unit, since the two are an integral structure, there is no need for additional sealing treatment of the telescopic tubes, simplifying the complex sealing process and improving the assembly efficiency of the cutter head 20, thereby improving production efficiency.

[0174] In some embodiments, to improve the sealing effect of the telescopic tube, the telescopic tube further includes a connecting structure integrally formed with the sealing telescopic tube 810 and the balancing telescopic tube 830. One end of the connecting structure is connected to the sealing telescopic tube 810, and the other end is connected to the balancing telescopic tube 830. The connecting structure can be integrally formed with the sealing telescopic tube 810 and the balancing telescopic tube 830 in various ways, such as through one-time injection molding, two-time injection molding, melt connection, welding, etc. The connecting structure is used to connect the sealing telescopic tube 810 and the balancing telescopic tube 830. The connecting structure can take many forms. In some embodiments, it can be a partial telescopic tube, in which case the sealing telescopic tube 810 and the balancing telescopic tube 830 are a complete telescopic tube; in other embodiments, it can be a non-tube-based connecting structure. The integrally formed sealing telescopic tube 810, connecting structure, and balancing telescopic tube 830 have good sealing performance and can also significantly improve sealing efficiency (compared to later sealing), which is beneficial to improving the production efficiency and operational stability of the telescopic tube.

[0175] In some embodiments, to improve the flexibility of the internal structure assembly of the cutter head 20, increase the compactness of the assembled structure, and improve the utilization rate of the space within the mounting cavity 610, the connection structure has a clearance opening 842. The transducer assembly 700 includes a transducer bracket 710 and an ultrasonic transducer 750 disposed on the transducer bracket 710; the clearance opening 842 is for allowing at least a portion of the transducer bracket 710 to pass through. Specifically, in this embodiment, the transducer bracket 710 may include a mounting bracket 716 for fixing the ultrasonic transducer 750, and an assembly bracket 717 for cooperating with other components (e.g., housing 600, second magnetic element 820, drive mechanism 900, etc.). Taking a combined bracket as an example, the assembly bracket 717 may be a detachably connected first bracket 711 and second bracket 712. The second bracket 712 is connected to the mounting bracket 716, and the first bracket 711 is connected to the second bracket 712. The bracket passing through the clearance opening 842 can be either the first bracket 711 or the second bracket 712, or both the first bracket 711 and the second bracket 712 can pass through the clearance opening 842. This allows for a convenient and direct connection and support between the first bracket 711 and the second bracket 712, significantly improving the structural compactness.

[0176] The clearance opening 842 can take many forms. For example, it can be formed by opening the clearance opening 842 on a sheet or plate-like structure, or by multiple strip-like structures enclosing the clearance opening 842. A specific example is given below. The connecting structure includes a first connecting arm 843 and a second connecting arm 844. The two ends of the first connecting arm 843 are respectively connected to a sealing telescopic tube 810 and a balancing telescopic tube 830. The two ends of the second connecting arm 844 are also connected to the sealing telescopic tube 810 and the balancing telescopic tube 830. The first connecting arm 843 and the second connecting arm 844 are spaced apart, and the sealing telescopic tube 810, the first connecting arm 843, the balancing telescopic tube 830, and the second connecting arm 844 enclose the clearance opening 842. Specifically, in this embodiment, the first connecting arm 843 and the second connecting arm 844 are elongated strips, which can be straight or curved. The first connecting arm 843 and the second connecting arm 844 can be flexible or rigid arms, depending on specific needs, and no special limitation is made here. For example, when the first connecting arm 843 and the second connecting arm 844 need to bear load, they can be set as rigid arms; when only connection is needed and no load-bearing is required, they can be set as flexible arms. The clearance opening 842 can have many shapes, including regular circles, ovals, squares, etc., or irregular shapes. No special limitations are imposed here, as long as it can achieve both connection and clearance. The clearance opening 842 is formed by the sealing telescopic tube 810, the first connecting arm 843, the balancing telescopic tube 830, and the second connecting arm 844 connected and enclosed in sequence.

[0177] In some embodiments, to increase the opening range of the clearance opening 842, the first connecting arm 843 has a first clearance portion 845, which bends away from the second connecting arm 844; and / or, the second connecting arm 844 has a second clearance portion 725, which bends away from the first connecting arm 843. Specifically, in this embodiment, the bending forms of the first clearance portion 845 and the second clearance portion 725 can be varied, such as an arc-shaped bend or a turning bend. By setting the first clearance portion 845 to bend away from the second clearance portion 725, and / or setting the second clearance portion 725 to bend away from the first clearance portion 845, the distance between the first clearance portion 845 and the second clearance portion 725 can be increased, thereby increasing the size of the clearance opening 842, which is beneficial for the clearance opening 842 to better avoid the support structure.

[0178] In some embodiments, to improve the compactness and stability of the structure, the end of the sealing telescopic tube 810 away from the connecting hole 612 is a self-sealing end 812, and the connecting structure is connected to the self-sealing end 812; and / or, the end of the balancing telescopic tube 830 adjacent to the sealing telescopic tube 810 is a self-sealing end 836, and the connecting structure is connected to the self-sealing end 836. In this embodiment, the meaning of the self-sealing end 812 can be referred to the above embodiments, and will not be repeated here. The meaning of the self-sealing end 836 is similar to that of the self-sealing end 812, and can be understood as a self-sealing structure formed at the end of the tube body. The self-sealing structure means that the internal space of the balancing telescopic tube 830 and the external environment of the balancing telescopic tube 830 are sealed and isolated at this position, and water, gas, dust, etc. in the external environment cannot enter the balancing telescopic tube 830 through this position. By connecting the connecting structure to the ends of the sealing telescopic tube 810 and the balancing telescopic tube 830, compared to connecting the connecting structure to the middle of the sealing telescopic tube 810 and the balancing telescopic tube 830, the former can have a larger connection position, while also avoiding the connecting structure occupying more space, making the overall structure of the telescopic tube more compact.

[0179] In some embodiments, to improve the connection strength between the sealing telescopic tube 810 and the balancing telescopic tube 830, the connection structure includes a first connecting arm 843 and a second connecting arm 844, both ends of which are respectively connected to the sealing telescopic tube 810 and the balancing telescopic tube 830; the end of the sealing telescopic tube 810 away from the connecting hole 612 is a closed end, and a first boss 818 is provided on the end face of the closed end; the ends of the first connecting arm 843 and the second connecting arm 844 away from the balancing telescopic tube 830 are respectively connected to the two ends of the first boss 818; and / or, the end of the balancing telescopic tube 830 adjacent to the sealing telescopic tube 810 is a sealed end, and a second boss 837 is provided on the end face of the sealed end; the ends of the first connecting arm 843 and the second connecting arm 844 away from the sealing telescopic tube 810 are respectively connected to the two ends of the second boss 837. Specifically, in this embodiment, by setting a boss and connecting the first connecting arm 843 and the second connecting arm 844 to the first boss 818, the thickness of the connection position between the first connecting arm 843 and the second connecting arm 844 and the sealing telescopic tube 810 is significantly increased, which is beneficial to improving the connection strength. Similarly, by setting a second boss 837 and connecting the first connecting arm 843 and the second connecting part 857 to the second boss 837, the thickness of the connection position between the first connecting arm 843 and the second connecting arm 844 and the sealing telescopic tube 810 is significantly increased, which is beneficial to improving the connection strength. The first protrusion 818 and the second protrusion 837 are arranged in parallel, and the first protrusion 818 and the second protrusion 837 are symmetrical about the middle position of the clearance opening 842, so that the two ends of the connection structure (the sealing telescopic tube 810 and the balancing telescopic tube 830) are symmetrical. Therefore, when the transducer assembly 700 drives the sealing telescopic tube 810 and the balancing telescopic tube 830, the sealing telescopic tube 810 and the balancing telescopic tube 830 are subjected to equal forces, so that the deformation of the two is equal, which is beneficial to improving the ability to balance hydraulic changes.

[0180] In some embodiments, to further improve the stability of the telescopic tube's movement, the sum of the lengths of the connecting structure and the balancing telescopic tube 830 in its natural state is equivalent to the length of the sealing telescopic tube 810. Specifically, in this embodiment, the telescopic tube, the sealing telescopic tube 810, and the balancing telescopic tube 830 are made of the same material. When the lengths at both ends are basically the same (the sum of the lengths of the connecting structure and the balancing telescopic tube 830 is equivalent to the length of the sealing telescopic tube 810), the resistance when the transducer assembly 700 stretches and compresses the telescopic tube is comparable, which is beneficial to the stable movement of the transducer assembly 700.

[0181] In some embodiments, the sealing telescopic tube 810 and the balancing telescopic tube 830 are separated, and this concept is incorporated into specific embodiments. A blade 20 is used in a skin treatment device. The blade 20 includes: a housing 600 having a mounting cavity 610 and a connection position; a transducer assembly 700 movably disposed within the mounting cavity 610; the connection position being located on one side of the transducer assembly 700 in its movable direction; and a telescopic tube having an open end 811 and a closed end, the open end 811 being connected to the connection position, and the closed end being fixedly connected to the transducer assembly 700. The transducer assembly 700 is used to drive the telescopic tube to move. Specifically, the telescopic tube in this embodiment can be a sealing telescopic tube 810 or a balancing telescopic tube 830. When the telescopic tube is a sealing telescopic tube 810, the connection position can be provided with a communicating hole 612. Of course, in some embodiments, the connection position may not communicate with the outside of the housing 600, in which case the closed end is a self-sealing end 812. When the telescopic tube is a balanced telescopic tube 830, the connection position can be provided with a vent 613. Of course, in some embodiments, the connection position may not be connected to the outside of the housing 600, in which case the closed end is a self-sealing end 836. Regardless of whether the telescopic tube is a sealed telescopic tube 810 or a balanced telescopic tube 830, it is a structure with one end open and the other end sealed. In this case, the sealed end does not require additional sealing. This eliminates the need to consider sealing issues during the connection of the sealed end of the telescopic tube to the transducer assembly 700, reducing the number of sealing process steps and improving the assembly efficiency of the cutter head 20.

[0182] Please see Figures 15 to 17 ,as well as Figures 23 to 28 Regarding the sealing connection structure 850, it is mainly used for sealing the connection between the telescopic tube 810 and the balanced telescopic tube 830. The sealing connection structure 850 can take many forms, and examples have been given in the above embodiments for simple description. The following is a description in conjunction with specific embodiments.

[0183] A blade head 20 for a skin treatment device includes: a housing 600 having a mounting cavity 610 and a through-hole structure 862 penetrating the side wall of the housing 600; a transducer assembly 700 movably disposed within the mounting cavity 610; a telescopic tube disposed within the mounting cavity 610, one end of which is an open end 861, and the other end is connected to the transducer assembly 700, the open end 861 communicating with the through-hole structure 862; and a sealing connection structure 850. 50 includes a clamping member 851 and a fastener 852 connected to the clamping member 851. At least a portion of the open end 861 is clamped by the clamping member 851 and the fastener 852, such that the clamped portion of the telescopic tube is sealed and fitted with the clamping member 851 and / or the fastener 852. The sealing connection structure 850 mates with the sidewall of the housing 600 to seal the open end 861 to the housing 600. The sealing connection structure 850 has a vent 854 to allow the interior of the telescopic tube to communicate with the outside through the opening of the open end 861 and / or the through-hole structure 862.

[0184] Specifically, in this embodiment, the specific structures of the housing 600, transducer assembly 700, and telescopic tube can be referred to in the above embodiments, and will not be repeated here. The telescopic tube can be independent of the above embodiments, or it can be integrated with those in the above embodiments. For example, the telescopic tube can be a sealed telescopic tube 810 or a balanced telescopic tube 830. When the telescopic tube is a sealed telescopic tube 810, the open end 861 corresponds to the open end 811 of the sealed telescopic tube 810 in the above embodiment, and the through-hole structure 862 corresponds to the connecting hole 612 in the above embodiment. When the telescopic tube is a balanced telescopic tube 830, the open end 861 of the telescopic tube corresponds to the first end 831 (specific opening) of the balanced telescopic tube 830 in the above embodiment, and the through-hole structure 862 corresponds to the vent 613 in the above embodiment. It is worth noting that the external communication between the telescopic tube and the housing 600 can be achieved through the open end 861, the through-hole structure 862, and one or more additional structural components.

[0185] There are various ways to connect the clamping member 851 and the fastener 852. They can be connected via snap-fit, threaded connection, screws, or other fasteners 852. The open end 861 is clamped by the clamping member 851 and the fastener 852. This clamping can be direct or indirect (meaning that in addition to clamping the open end 861, other components are also clamped, such as the sidewall of the housing 600, other connecting structures, etc.). The clamped portion is sealed and fitted to the component it directly contacts. For example, the clamped portion of the telescopic tube is sealed and fitted to the clamping member 851 and / or the fastener 852. The sealing connection structure 850 and the sidewall of the housing 600 can be fitted in many ways, such as through screws or other fasteners 852, snap-fit, adhesive, or threads. Of course, in some embodiments, clamping can also achieve the fit. The vent 854 of the sealing connection structure 850 can be formed on the clamping member 851. In some embodiments, it can also be formed on the fastener 852, and in some embodiments, it can also be formed on other components of the sealing connection structure 850. Of course, in some embodiments, the vent 854 can also be formed by splicing multiple components, such as by enclosing it with the clamping member 851 and the fastener 852. Without making any special limitations, this example uses the clamping member 851 having the vent 854.

[0186] In this embodiment, by providing a sealing connection structure 850 including a clamping member 851 and a fastener 852, and clamping at least a portion of the open end 861 with the clamping member 851 and the fastener 852, and by cooperating with the housing 600 through the sealing connection structure 850, the open end 861 is sealed and fitted with the clamping member 851 and / or the fastener 852, thus preventing liquid from entering the telescopic tube from the open end 861. Simultaneously, the sealing connection structure 850 cooperates with the housing 600, forming a sealed connection, thereby preventing liquid from entering the telescopic tube through the sealing connection structure 850. Furthermore, the provision of a vent 854 allows the interior of the telescopic tube to communicate with the exterior of the housing 600 through the vent 854 and / or the vent 613. Thus, both the sealed connection of the open end 861 of the telescopic tube and the communication between the telescopic tube and the exterior of the housing 600 are ensured for air intake and exhaust.

[0187] There are many clamping forms for the sealing connection structure 850. We will illustrate them with the following two categories: First, the sealing connection structure 850 not only clamps the telescopic tube but also the side wall of the housing 600, achieving connection with the housing 600 through clamping. In this case, one of the clamping member 851 and the fastener 852 is located inside the housing 600, and the other is located outside the housing 600. Second, the sealing connection structure 850 clamps the telescopic tube and the connector 853, achieving connection with the housing 600 through the connector 853. In this case, some or all of the clamping member 851, the fastener 852, and the connector 853 are located inside the housing 600, with the remaining parts located outside the housing 600, including cases where all are located inside or outside the housing 600. Examples will be given below for each category.

[0188] In some embodiments, the open end 861 has a sealing flange 833, and the clamping member 851 has a vent 854. One of the clamping member 851 and the fastener 852 is located outside the housing 600, and the other is located inside the housing 600. The clamping member 851 includes a first connecting portion 855 and a clamping portion 856 connected to the first connecting portion 855. The fastener 852 includes a second connecting portion 857 and a clamping portion 858 connected to the second connecting portion 857. The first connecting portion 855 passes through the through-hole structure 862 and is fastened to the second connecting portion 857. The clamping portion 856 and the clamping portion 858 clamp the side wall of the housing 600 and the sealing flange 833. Specifically, in this embodiment, the sealing flange 833 can extend radially outward along the telescopic tube, or it can extend radially outward along the telescopic tube. As long as the sealing flange 833 is sealed, the end of the telescopic tube can be effectively sealed. The first connecting portion 855 of the clamping member 851 and the second connecting portion 857 of the fastener 852 can take many forms, without any particular limitation here. Specifically, it depends on the connection method between the first connecting portion 855 and the second connecting portion 857. The first connecting portion 855 and the second connecting portion 857 can be connected by threaded connection, snap-fit ​​connection, screw or other fasteners 852, etc. Taking the threaded connection as an example, for a specific example, the first connecting portion 855 is rod-shaped, and the clamping portion 856 is plate-shaped or block-shaped. One end of the first connecting portion 855 is connected to one side of the clamping portion 856, and the other end is provided with external threads. The second connecting portion 857 is a hole-shaped structure adapted to the first connecting portion 855, and the hole-shaped structure is provided with internal threads, with the external threads and internal threads engaging. The clamping portion 858 is located on the periphery of the hole-shaped structure. When the first connecting portion 855 and the second connecting portion 857 are threadedly connected, a clamping space is formed between the clamping portion 856 and the clamping portion 858. Understandably, the positions of internal and external threads can be interchanged with appropriate structural adjustments. For example, when the first connecting part 855 has an internal thread (the first connecting part 855 has a hole structure, and the internal thread is formed within the hole structure), the second connecting part 857 has an external thread (the second connecting part 857 has a rod structure, and the external thread is formed within the rod structure). Taking the clamping member 851 located inside the housing 600 as an example, the fastener 852 is located outside the housing 600, the clamping part 856 presses the sealing flange 833 against the inner sidewall of the housing 600, the first connecting part 855 passes through the through hole structure 862 and is threadedly connected to the second connecting part 857 of the fastener 852, so that the clamping part 856 and the clamping part 858 clamp the sidewall of the housing 600 and the sealing flange 833. After the first connecting part 855 and the second connecting part 857 are connected, the sealing flange 833 is located between the pressing part 856 and the inner wall of the housing 600, and the clamping part 858 abuts against the outer wall of the housing 600 corresponding to the pressing part 856.In this embodiment, by placing one of the clamping member 851 and the fastener 852 outside the housing 600 and the other inside the housing 600, and by configuring the first connecting part 855 to pass through the through hole structure 862 and be fastened to the second connecting part 857, the clamping part 856 and the clamping part 858 clamp the side wall of the housing 600 and the sealing flange 833. In this way, a very simple structure is used to achieve a sealed connection between the open end 861 and the through hole structure 862, which is beneficial to improving the sealing installation efficiency of the telescopic tube.

[0189] In some embodiments, to improve the smoothness of gas entry and exit from the telescopic tube, an air passage 854 penetrates the first connecting portion 855 and the clamping portion 856. The clamping portion 856 is located on one side of the sidewall of the housing 600, and the first connecting portion 855 extends through the through-hole structure 862 to the other side of the sidewall of the housing 600. One end of the air passage 854 communicates with the interior of the telescopic tube, and the other end communicates with the exterior of the housing 600. In this embodiment, by having the air passage 854 penetrate the first connecting portion 855 and the clamping portion 856, the air passage 854 extends from the inside of the housing 600 to the outside of the housing 600, with one end communicating with the interior of the telescopic tube and the other end communicating with the exterior of the housing 600, thus achieving communication between the interior of the telescopic tube and the exterior of the housing 600.

[0190] In some embodiments, to improve the connection stability between the clamping member 851 and the telescopic tube, the clamping part 856 is located inside the telescopic tube; the open end 861 has a covering part 863, which wraps around the edge of the clamping part 856, and the covering part 863 located between the clamping part 856 and the inner wall of the housing 600 is a sealing flange 833. In this embodiment, the sealing flange 833 extends inward into the telescopic tube, wrapping around the edge of the clamping part 856, so that the clamping part 856 stably and fully engages with the sealing flange 833. While improving the connection stability between the clamping part 856 and the telescopic tube, it also allows the sealing flange 833 to better fit with the clamping part 856, thereby ensuring a sealing effect. Meanwhile, the clamping part 856 is set inside the telescopic tube, and the air passage 854 is set through the clamping part 856 and the first connecting part 855, so that the connection path between the telescopic tube and the air passage 854 is very simple, which simplifies the matching structure between the telescopic tube and the clamping part 851, and improves the space utilization and the compactness of the structure.

[0191] Regarding the second type of case, in some embodiments, the sealing connection structure 850 further includes a connector 853. Specifically, the end of the telescopic tube open end 861 has a sealing flange 833, and an air vent 854 passes through the clamping member 851. The clamping member 851 includes a first connecting portion 855 and a clamping portion 856 connected to the first connecting portion 855. The fastener 852 includes a second connecting portion 857 and a clamping portion 858 connected to the second connecting portion 857. The sealing connection structure 850 also includes a connector 853, which includes a third connecting portion 859 and an extension portion 85a connected to the third connecting portion 859; the third connecting portion 859 is used for fixed connection with the side wall of the housing 600; the first connecting portion 855 is fastened to the second connecting portion 857; the pressing portion 856 and the clamping portion 858 clamp the extension portion 85a and the sealing flange 833, or the pressing portion 856 and the clamping portion 858 clamp the extension portion 85a, the sealing flange 833, and the side wall of the housing 600.

[0192] Specifically, compared to the above embodiments, the sealing connection structure 850 in this embodiment further includes a connector 853. In this case, the sealing connection structure 850 can cooperate with the side wall of the housing 600 in three ways: the first is as in the above embodiments, where the side wall of the housing 600 is clamped by the pressing part 856 and the clamping part 858; the second is connected to the side wall of the housing 600 by the connector 853; and the third is where the pressing part 856 and the clamping part 858 clamp the side wall of the housing 600 while the connector 853 is connected to the side wall of the housing 600. Thus, by providing the connector 853, the sealing connection structure 850 can seal the open end 861 to the through-hole structure 862 in more ways, which is beneficial for selecting a suitable assembly method according to the actual situation. The specific installation of the pressing part 856 and the telescopic tube, as well as the connection method of the first connector 855 and the second connector 857, can be referred to the above embodiments and will not be repeated here.

[0193] In the second scenario, the components of the sealing connection structure 850 can be located on the same side (inner or outer) of the housing 600. Specifically, the clamping member 851, the fastener 852, and the connector 853 are all located inside or outside the mounting cavity 610; the clamping part 856 and the clamping part 858 clamp the sealing flange 833 and the extension part 85a, and the third connecting part 859 is fixedly connected to the inner wall of the housing 600; the vent 854 passes through the first connecting part 855 and the clamping part 856, with one end of the vent 854 communicating with the telescopic tube and the other end communicating with the through hole structure 862, so that the telescopic tube communicates with the outside of the housing 600 through the vent 854 and the through hole structure 862. Taking the clamping member 851, fastener 852, and connector 853 located inside the housing 600 as an example, the first connecting part and the second connecting part 857 are connected, and the clamping part 856 and the clamping part 858 clamp the sealing flange 833 and the extension part 85a. The clamping part 856 is in contact with the sealing flange 833, and the extension part 85a is located between the sealing flange 833 and the clamping part 858. The third connecting part 859 can be connected to the housing 600 in many ways, such as by fasteners 852 (e.g., screws), or by snap-fit ​​connections. In this embodiment, taking the example of a protrusion or connecting post provided on the inner wall of the housing 600, the third connecting part 859 is fastened to the protrusion or connecting post by screws.

[0194] In some embodiments, to further improve the sealing connection effect between the sealing connection structure 850 and the sidewall of the housing 600, an annular rib 654 is provided on the inner sidewall of the mounting cavity 610. The space enclosed by the annular rib 654 communicates with the vent 854, and the fastener 852 is at least partially located within the area enclosed by the annular rib 654. The extension 85a has a receiving space 85b open on one side, and the extension 85a covers the outer side of the annular rib 654. The first connecting portion 855 extends into the receiving space 85b and is fastened to the second connecting portion 857. Specifically, in this embodiment, by providing the receiving space 85b on the extension 85a and covering the receiving space 85b on the annular rib 654, the fastener 852 can be received within the annular rib 654 and / or the receiving space 85b, making full and reasonable use of space. At the same time, a complex sealing surface is formed between the inner sidewall of the receiving space 85b and the outer sidewall of the annular rib 654, which is beneficial to improving the sealing effect. In some embodiments, to further improve the sealing effect, the inner wall of the receiving space 85b is sealed to the outer wall of the annular rib 654; and / or, the side of the extension 85a facing away from the telescopic tube is sealed to the inner wall of the housing 600. The sealing connection can be achieved in various ways, such as through mechanical bonding, and / or by providing a sealing layer. For example, the surface of the extension 85a that is in contact with the inner wall of the housing 600 can be pressed against the inner wall surface of the housing 600, or a sealing layer can be provided at the pressing position. By placing the fasteners 852, the clamping member 851, and the connector 853 inside the housing 600, the exterior of the housing 600 is clean and tidy, improving its aesthetic appearance. Simultaneously, the fasteners 852, the clamping member 851, and the connector 853 are hidden, preventing external environmental influences (such as external forces, accidental collisions, etc.) from affecting their operation, thus improving the working stability of the cutter head 20.

[0195] Please see Figures 18 to 22 There are various forms of the drive mechanism 900 used to move the transducer assembly 700, such as drive by a motor or drive by an electromagnet 930, which will be described in detail in the following embodiments. It is worth noting that the drive mechanism 900 here refers to the drive mechanism 900 disposed within the housing 600, which can be used to drive the transducer assembly 700 to move along the width direction of the cutter head 20. Please refer to [link to details]. Figure 3The length, width, and height directions of the housing 600 are perpendicular to each other, with the height direction aligned with the opening direction of the acoustic wave outlet 611. The plane defined by the length and width directions is parallel to the acoustic wave outlet 611. It is worth noting that the skin treatment device with the blade 20 may consist only of the drive mechanism 900 within the housing 600, or it may also include a drive assembly 210 that drives the transducer assembly 700 to move along the length of the skin treatment device. The drive assembly 210 may be located within the housing 600 or within the outer shell 100 of the handheld component 10. The following embodiments will illustrate this with the drive assembly 210 located within the handheld component 10 as an example.

[0196] The specific form and working principle of the drive mechanism 900 will be explained below with reference to the complete embodiment.

[0197] A skin treatment device includes a handheld component 10 and a blade 20, with one end of the blade 20 connected to the handheld component 10. The blade 20 includes a housing 600, a transducer assembly 700 disposed within the housing 600, and a drive mechanism 900. The housing 600 has an acoustic wave outlet 611, and the transducer assembly 700 is disposed corresponding to the acoustic wave outlet 611. The handheld component 10 includes a drive assembly 210 and a drive shaft 250 pulverizedly connected to the drive assembly 210. The drive end of the drive shaft 250 is used to connect to the transducer assembly 700. The drive assembly 210 drives the transducer assembly 700 to move along a first direction via the drive shaft 250, and the drive mechanism 900 drives the transducer assembly 700 to move along a second direction. The first and second directions are intersected to define a path plane. The path plane is parallel to the acoustic wave outlet 611 so that the distance between the transducer assembly 700 and the acoustic wave outlet 611 is substantially the same when the transducer assembly 700 moves within the path plane.

[0198] Specifically, in this embodiment, the first direction and the second direction refer to the approximate directions of movement of the transducer assembly 700, not the specific path of movement of the transducer assembly 700. That is, the movement of the transducer assembly 700 in the first direction can be along a straight line or along an arc; similarly, the movement of the transducer assembly 700 in the second direction can be along a straight line or along an arc. Taking the movement in both the first and second directions as a straight line as an example, the first direction can be the length direction of the housing 600 (the length direction of the skin treatment device), and the second direction can be the width direction of the housing 600. Of course, in other embodiments, it is only necessary that the first and second directions allow the transducer assembly 700 to move within a plane and maintain a distance from the acoustic wave outlet 611 during the movement. The specific forms of the drive assembly 210 and the drive mechanism 900 can be many. For example, they can be driven by a linear motor, or they can be achieved by a combination of a rotary motor and a transmission structure. In some embodiments, movement can also be achieved by the magnetic attraction and / or magnetic repulsion of the electromagnet 930. No special limitations are made here. The opening of the acoustic wave outlet 611 is positioned along the height direction of the housing 600, allowing the ultrasonic waves emitted by the ultrasonic transducer 750 to exit perpendicularly to the acoustic wave outlet 611. During the user's use of the skin treatment device, the acoustic wave outlet 611 is in contact with the user's skin. Since the path plane of the transducer assembly 700 is approximately equidistant from the acoustic wave outlet 611, the distance between the transducer assembly 700 and the human skin remains essentially constant as the transducer assembly 700 moves within the path plane. This ensures that the ultrasonic waves emitted by the ultrasonic transducer 750 penetrate the skin to a consistently deep depth.

[0199] In this embodiment, by placing the drive mechanism 900 within the housing 600, the distance between the drive mechanism 900 and the transducer assembly 700 is reduced, thereby decreasing the transmission distance and energy loss. This improves both transmission efficiency and transmission accuracy (a shorter transmission distance results in faster transmission speed and smaller transmission error), enabling precise adjustment of the transducer assembly 700's movement by the drive mechanism 900. Furthermore, by placing both the drive mechanism 900 and the transducer assembly 700 within the housing 600, modularity of the drive mechanism 900 and the transducer assembly 700 is achieved. They can be assembled and then installed within the housing 600, thus improving the efficiency of the cutter head. The assembly efficiency is 20%. Meanwhile, the movement in the first direction and the movement in the second direction are realized by the drive component 210 and the drive mechanism 900, respectively. The movement control in the two directions is independent of each other and can be carried out simultaneously, which is beneficial to improving the adjustment efficiency. In addition, by setting the transducer component 700 to move in the path plane, the distance between the transducer component 700 and the sound wave outlet 611 is basically consistent, so that the distance between the transducer component 700 and the human skin is basically consistent during the movement. This makes the depth of action of the ultrasonic waves emitted by the ultrasonic transducer 750 on the skin basically consistent, which is beneficial to improving the uniformity of skin treatment by the skin treatment device. In some embodiments, in order to better drive the ultrasonic transducer 750 to move, the drive mechanism 900 includes a drive motor 910 and a transmission mechanism 920. The transducer assembly 700 includes an assembly bracket 717, a mounting bracket 716 and an ultrasonic transducer 750. The ultrasonic transducer 750 is mounted on the mounting bracket 716. The mounting bracket 716 is movably connected to the assembly bracket 717. The drive shaft 250 and the drive motor 910 are fixedly connected to the assembly bracket 717. The transmission mechanism 920 is drively connected to the mounting bracket 716.

[0200] In this embodiment, one end of the mounting bracket 716 is used to mount the ultrasonic transducer 750, and the other end is movably connected to the assembly bracket 717. There are many ways to assemble the ultrasonic transducer 750 and the mounting bracket 716, such as by snap-fit ​​connection, by fasteners 852 such as screws, by adhesive connection, magnetic adsorption connection, etc., and no special limitation is made here. For example, the end used to mount the ultrasonic transducer 750 has a receiving groove in the mounting bracket 716, and the ultrasonic transducer 750 is snapped into the receiving groove by a snap-fit. There are various ways to movably connect the mounting bracket 716 and the assembly bracket 717, such as sliding connection, swing connection, etc. In this embodiment, one of the mounting bracket 716 and the assembly bracket 717 is provided with a sliding groove 71c, and the other is provided with a sliding rail 71d. The sliding rail 71d is inserted into the sliding groove 71c, so that the sliding rail 71d can slide along the sliding groove 71c, thereby allowing the mounting bracket 716 to slide relative to the assembly bracket 717. The extension direction of the slide groove 71c can be the second direction in the above embodiment, for example, it can be set along the width direction of the housing 600. There are many ways to connect the drive shaft 250 to the mounting bracket 717, such as by snap-fit ​​connection, fastener 852 (such as screws), threaded connection, or magnetic adsorption connection. No special limitation is made here; magnetic adsorption connection is taken as an example. There are various ways to fix the drive motor 910 to the mounting bracket 717, such as by snap-fit ​​connection, fastener 852 (such as screws), or threaded connection. There are many ways to implement the transmission mechanism 920, such as gear transmission, gear and rack transmission, worm gear and worm transmission, or linkage transmission. No special limitation is made here. In this embodiment, taking the transmission mechanism 920, which includes a transmission gear 921 and a transmission rack 922, as an example, the transmission rack 922 is disposed on one side of the mounting bracket 716. The drive motor 910 has a drive shaft 913, the free end of which is the drive end. The transmission gear 921 is fixedly connected to the drive end of the drive shaft 913 and meshes with the transmission rack 922. When the drive mechanism 900 is working, the drive motor 910 drives the transmission gear 921 to rotate through the drive shaft 913. The transmission gear 921 drives the mounting bracket 716 to slide along the slide groove 71c through meshing with the transmission rack 922. The ultrasonic transducer 750 moves along the second direction as the mounting bracket 716 moves.

[0201] In some embodiments, to ensure stable meshing between the transmission gear 921 and the transmission rack 922 and to prevent the drive shaft 913 from swinging outward during operation, a limiting hole 71e is provided on the mounting bracket 717. The limiting hole 71e is located adjacent to the transmission rack 922, and the drive shaft 913 of the drive motor 910 passes through the limiting hole 71e to limit the movement area of ​​the drive shaft 913, thereby enabling the transmission gear 921 to mesh with the transmission rack 922. In this embodiment, the shape of the limiting hole 71e can be varied, such as a regular circle, ellipse, or waist shape, or it can be an irregular shape, such as two semicircles with unequal radii, as long as it can limit the radial swing of the drive shaft 913. In this embodiment, by setting the limiting hole 71e, the range of swing of the drive shaft 913 in its radial direction can be limited, preventing the transmission gear 921 from disengaging from the transmission rack 922 due to its swing, thereby improving the stability of the engagement between the transmission gear 921 and the transmission rack 922.

[0202] Regarding the formation of the limiting hole 71e, in some embodiments, the assembly bracket 717 includes a bracket body and a limiting member 71f. The limiting member 71f is detachably connected to the bracket body, and the limiting member 71f and the bracket body enclose the limiting hole 71e; or, the limiting hole 71e is formed on the limiting member 71f; or, the limiting hole 71e is formed on the bracket body. That is, in this embodiment, the formation or closure of the limiting hole 71e is associated with the limiting member 71f. During assembly, the drive shaft 913 can be passed through the area forming the limiting hole 71e first, and then the limiting member 71f can be connected to the bracket body to form the limiting hole 71e that limits the drive shaft 913. During disassembly, the limiting member 71f can be removed from the main body first, and then the drive shaft 913 can be taken out. Thus, during assembly, we can first install the transmission gear 921 onto the drive shaft 913 outside the housing 600, then install the drive motor 910 and the transmission gear 921 together onto the assembly bracket 717, and finally install them together inside the housing 600. This avoids installing the transmission gear 921 in a confined space. Furthermore, by installing the transmission gear 921 first and then using the limiting member 71f for positioning, we can improve the ease of assembly and the assembly efficiency of the cutter head 20.

[0203] In other embodiments, to improve the working stability and load-bearing capacity of the drive shaft 913, a limiting bearing is fitted onto the drive shaft 913 of the drive motor 910, and the limiting bearing is mounted on the mounting bracket 717. There are many ways to install the limiting bearing onto the mounting bracket 717, such as providing a limiting hole 71e on the mounting bracket 717 and installing the limiting bearing into the limiting hole 71e, or installing the limiting bearing onto the mounting bracket 717 using a bearing bracket. In this embodiment, the mounting bearing not only supports the middle part of the drive shaft 913, preventing it from deforming during operation due to excessive length, but also limits the radial position of the drive shaft 913, preventing it from swaying during operation and causing the transmission gear 921 and transmission rack 922 to disengage. Thus, the stability of the drive shaft 913 during operation can be significantly improved.

[0204] In some embodiments, to make reasonable use of the space in the housing 600 and improve the compactness of the internal structure of the cutter head 20, a sealing telescopic tube 810, a balancing telescopic tube 830, and a connecting structure connecting the sealing telescopic tube 810 and the balancing telescopic tube 830 are also provided inside the cutter head 20. The connecting structure has a clearance opening 842 through which the drive shaft 913 extends to one side of the mounting bracket 716. Specifically, in this embodiment, the clearance opening 842 can be formed in many ways, and no special limitation is made here. For details, please refer to the form of the clearance opening 842 in the above embodiment. By setting the clearance opening 842, the drive shaft 913 can extend directly from the drive motor 910 to one side of the mounting bracket 716, avoiding the drive shaft 913 having to go through a complex path to transfer the energy of the drive motor 910, simplifying the structure and improving the space utilization rate.

[0205] In some embodiments, the assembly bracket 717 includes a detachable first bracket 711 and a second bracket 712. The drive motor 910 is mounted on the first bracket 711, and the mounting bracket 716 is movably connected to the second bracket 712. The first bracket 711 and the second bracket 712 are detachably connected. This allows the installation of the drive motor 910 to the first bracket 711 and the installation of the mounting bracket 716 to the second bracket 712 to be performed separately and simultaneously, which helps to improve the assembly progress.

[0206] In some embodiments, to further improve the compactness of the structure, the first bracket 711 and the second bracket 712 enclose a communicating space. A telescopic tube is also provided inside the cutter head 20, with one end connected to an inner wall of the housing 600 and the other end passing through the communicating space and connected to another inner wall of the housing 600. The telescopic tube may include a sealing telescopic tube 810, a balancing telescopic tube 830, and a connecting structure connecting the sealing telescopic tube 810 and the balancing telescopic tube 830, the specific form of which can be referred to the embodiments above. After the telescopic tube is installed, at least a portion of the telescopic tube is housed within the communicating space. The housed portion can be any one or more of the three parts of the telescopic tube (the sealing telescopic tube 810, the balancing telescopic tube 830, and the connecting structure), taking the partial housing of the connecting structure and the end of the sealing telescopic tube 810 as an example. Among them, some connection structures can provide a clearance opening 842 for the drive shaft 913 or a support structure (extending from the first bracket 711 to the second bracket 712 and abutting against the bottom of the second bracket 712), and the self-closing end 812 of the sealing telescopic tube 810 can be used to install the second magnetic component 820, so that the second magnetic component 820 can be locked in the communicating space (the communicating space can have the slot 720 mentioned in the above embodiment).

[0207] There are various ways to form a connected space, which will be illustrated with examples below. The first support 711 includes a base 71a, and a first support platform and a second support platform disposed on the base 71a, with the first and second support platforms spaced apart. The two ends of the second support 712 are respectively connected to the ends of the first and second support platforms away from the base 71a, so that the base 71a, the second support 712, and the first and second support platforms enclose and form a connected space. The second support 712 can be connected to the first and second support platforms in many ways, such as by snap-fit ​​connection, fasteners 852 such as screws, adhesive connection, or hot-melt welding, etc. No specific limitation is made here; we will take the connection by screws or other fasteners as an example. In some embodiments, to improve the connection efficiency and accuracy between the second support 712 and the first and second support platforms, positioning posts can be provided on the top of the first and second support platforms, and positioning holes can be provided on the bottom of the second support 712.

[0208] In some embodiments, to improve the connection stability of the first support 711 and the second support 712, a support structure is further provided between the first support platform and the second support platform. One end of the support structure is fixedly connected to the base 71a, and the other end extends to the bottom of the second support 712 and abuts against the bottom of the second support 712. This effectively supports the middle part of the second support 712, which helps to improve the load-bearing capacity of the second support. The support structure passes through the clearance opening 842 and is adjacent to the self-closing end 812 of the sealing telescopic tube 810. When the self-closing end 812 is deformed under pressure, the support structure can restrict the end face of the self-closing end 812 and improve the stability of the self-closing end 812.

[0209] This application further proposes a blade head for use in a skin treatment device. The blade head includes a housing, a transducer assembly and a drive mechanism disposed within the housing. The housing has a sound wave outlet, and the transducer assembly is disposed corresponding to the sound wave outlet. The skin treatment device also includes a handheld component, with one end of the blade head connected to the handheld component. The handheld component includes a drive assembly and a drive shaft pulverizedly connected to the drive assembly. The drive end of the drive shaft is used to connect to the transducer assembly. The drive assembly drives the transducer assembly to move along a first direction via the drive shaft, and the drive mechanism drives the transducer assembly to move along a second direction. The first and second directions are intersected to define a path plane. The path plane is parallel to the sound wave outlet so that the distance between the transducer assembly and the sound wave outlet is substantially the same when the transducer assembly moves within the path plane.

[0210] Please see Figures 10 to 14 In some embodiments, to further improve the space utilization and structural compactness of the components within the cutter head 20 housing 600, the housing of the drive motor 910 is integrally formed with part of the support of the transducer assembly 700. The above concept will be described below within the context of a complete technical solution.

[0211] This application further proposes a blade 20 for a skin treatment device. The blade 20 includes: a housing 600 having a mounting cavity 610; a transducer assembly 700 including a mounting bracket 717 and a transducer structure; the mounting bracket 717 including a first bracket 711 and a second bracket 712 connected together, the transducer structure being movably mounted on the second bracket 712; and a drive mechanism 900 including a drive motor 910 and a transmission mechanism 920, the transmission mechanism 920 being drively connected to the transducer structure and the drive motor 910 so that the transducer structure can move within the mounting cavity 610 under the action of the transmission mechanism 920; the drive motor 910 including a first housing portion 911 and a second housing portion 912 sealed together, the first housing portion 911 being integrally formed with the first bracket 711.

[0212] Specifically, in this embodiment, the transducer structure can take various forms. For example, it can consist only of an ultrasonic transducer 750, in which case the ultrasonic transducer 750 is directly and movably connected to the second bracket 712. In some embodiments, the transducer structure can also include an ultrasonic transducer 750 and a mounting bracket 716 for mounting the ultrasonic transducer 750, in which case the mounting bracket 716 is movably connected to the second bracket 712. In this embodiment, the specific structures of the housing 600, the mounting bracket 717, and the transmission mechanism 920, etc., can be found in the embodiments above and will not be repeated here. The main difference between this embodiment and the embodiments above is that the first housing 911 of the drive motor 910 and the first bracket 711 of the transducer assembly 700 are integrally formed. There are various ways to form an integral structure, such as one-time injection molding, which is a one-piece structure made of the same material; or two-stage injection molding, which is a nested structure. There are many ways to seal the first shell 911 and the second shell 912, such as sealing with a through-hole structure 862, sealing with sealant, sealing by hot melting, or sealing by welding, etc. No special limitation is made here.

[0213] In this embodiment, by integrally molding the first bracket 711 of the transducer assembly 700 with the first housing 911 of the drive motor 910, the process of installing the drive motor 910 onto the first bracket 711 is omitted, greatly simplifying the assembly process. At the same time, the connection strength between the drive motor 910 and the mounting bracket 717 is increased, which is beneficial to improving installation stability. By integrally molding the first bracket 711 and the first housing 911, the connecting parts connecting the two are eliminated, and the space for installing these connecting parts is also saved, making the connection between the drive motor 910 and the mounting bracket 717 more compact and the space utilization rate higher.

[0214] The specific structure of the first support 711 is described in detail below. The first support 711 includes a base 71a and a first connecting structure 713 disposed on the base 71a. The second support 712 has a second connecting structure 714. The first connecting structure 713 and the second connecting structure 714 are connected. The base 71a is sealed to the second shell portion 912. Specifically, in this embodiment, the shape of the base 71a can be various. In this embodiment, an annular portion matching the second shell portion 912 is used as an example. The bottom of the base 71a mates with the top of the second shell portion 912, and a sealing structure is provided at the mating position. The sealing structure can be in the form of the sealed connection between the first shell portion 911 and the second shell portion 912 mentioned above. By configuring the first bracket 711 to include a base 71a and a first connecting part 855 disposed on the upper side of the base 71a, and then connecting the first connecting part 855 to the second bracket 712, the bottom of the base 71a (the side facing away from the first connecting part 855) is fitted with the second shell part 912, so that the top and bottom of the base 71a are connected to different components respectively. In this way, the spatial layout on both sides of the base 71a is fully considered, the space is fully and rationally utilized, and the compactness of the structure is improved.

[0215] There are many ways to seal the connection between the base 71a and the second housing 912. An example is given below. One of the base 71a and the second housing 912 has a sealing groove 914, and the other has a sealing rib 915, which is inserted into the sealing groove 914. In this embodiment, the sealing groove 914 can be located at the bottom of the base 71a (in which case the sealing rib 915 is located at the top of the second housing 912), or it can be located at the top of the second housing 912 (in which case the sealing rib 915 is located at the bottom of the base 71a). Taking the example of the sealing groove 914 being located at the bottom of the base 71a and the sealing rib 915 at the top of the second housing 912, in some embodiments, to further improve the sealing connection between the base 71a and the second housing 912, sealant can be provided in the sealing groove 914 to fill the gap between the sealing rib 915 and the sealing groove 914, achieving a seal in one step. Within the space formed by the first housing 911 and the second housing 912, a rotor, stator, and other structures of a motor are provided. One end of the drive shaft 913 of the drive motor 910 is fixedly connected to the rotor, and the other end extends out of the motor interior from the base 71a. A shaft hole is formed at the beginning of the base 71a, through which the drive shaft 913 of the drive motor 910 passes. A sealing ring groove 916 is formed on the inner wall of the shaft hole. This seals the drive shaft 913 within the shaft hole. In some embodiments, to further improve the sealing effect of the drive shaft 913 in the shaft hole, multiple sealing ring grooves 916 are provided, spaced apart along the depth direction of the shaft hole; and / or, sealing oil is provided within the sealing ring grooves 916. That is, oil can be provided within the sealing ring grooves 916 to achieve an oil seal, thereby improving the sealing effect; the sealing effect can also be increased by increasing the number of sealing ring grooves 916.

[0216] Regarding the specific structure of the first bracket 711 and the second bracket 712, please refer to the content in the above embodiment. In the following embodiment, the second bracket 712 is specifically configured as a block. The block-shaped second bracket 712 facilitates a fastening connection with the first bracket 711 (connected to the first support boss 718 and the second support boss 719 by screws) and also provides a convenient sliding groove 71c. Specifically, to illustrate a more complete solution here, the content already described in the above embodiment is briefly introduced. The first connecting structure 713 includes the first support boss 718 and the second support boss 719 spaced apart. The second bracket 712 includes a limiting block 71b, which is connected to the end of the first support boss 718 and the second support boss 719 away from the base 71a. The transducer structure includes a mounting bracket 716 and an ultrasonic transducer 750 mounted on the mounting bracket 716. One of the mounting bracket 716 facing the limiting block 71b and the other of the limiting block 71b facing the mounting bracket 716 have a groove 71c, and the other has a slide rail 71d. The slide rail 71d is located within the groove 71c, allowing the ultrasonic transducer 750 to move along the groove 71c with the mounting bracket 716. Two guide rods 730 are also provided inside the housing 600, with their ends connected to the inner wall of the housing 600. The two guide rods 730 pass through a first support boss 718 and a second support boss 719, respectively. A first bracket 711 is slidably connected to the guide rods 730. The transmission mechanism 920 includes a transmission gear 921 and a transmission rack 922. The transmission rack 922 is disposed on one side of the mounting bracket 716. The transmission gear 921 is fixedly connected to the drive shaft 913 of the drive motor 910 and meshes with the transmission rack 922.

[0217] In some embodiments, to further improve the sealing effect of the drive motor 910, a wire passage is provided on the first housing 911 or the second housing 912, through which the wire of the drive motor 910 passes; a sealant structure is provided inside the wire passage. Specifically, in this embodiment, the wire passage is provided on the second housing 912 as an example, so as to be as far away as possible from the sealing telescopic tube 810 fixedly installed on the first housing 911 (first bracket 711), to prevent the moving sealing telescopic tube 810 from touching the wire. An outlet hole is provided at one end of the housing 600 where the electronic control board is located, and the wire extends through the outlet hole to the outside of the housing 600 and is electrically connected to the electronic control board. By providing sealant at the wire passage, the inner wall of the wire passage and the wire are filled with sealant, preventing liquid in the housing 600 from entering the drive motor 910 through the wire passage.

[0218] Please see Figures 18 to 25 The principle of the drive mechanism 900 being driven by the electromagnet 930 will be explained below with reference to the complete embodiment.

[0219] A blade 20 for a skin treatment device includes: a housing 600 having a mounting cavity 610; a drive mechanism 900 including at least one electromagnet 930 and at least one magnet 931; and a transducer assembly 700 including a base support 760, a swing structure 770, and an ultrasonic transducer 750. The portion between the two ends of the swing structure 770 is rotatably connected to the base support 760. One end of the swing structure 770 is connected to the ultrasonic transducer 750, and the other end is provided with one of the electromagnet 930 and the magnet 931. The other electromagnet 930 and the magnet 931 are fixedly mounted on the base support 760, and the electromagnet 930 and the magnet 931 are arranged adjacent to each other. When the electromagnet 930 and the magnet 931 magnetically attract or repel each other, the ultrasonic transducer 750 moves within the mounting cavity 610 under the drive of the swing structure 770.

[0220] Specifically, in this embodiment, the swing structure 770 can take various forms, such as being circular or elliptical. In this embodiment, it is exemplified by its overall elongated shape. The swing structure 770 has an input end and an output end. The ultrasonic transducer 750 is located at the output end, and the electromagnet 930 or magnetic body 931 is located at the input end. After the portion between the two ends of the swing structure 770 is rotatably connected to the base support 760, the two ends of the swing structure 770 can swing. For example, when an external force is applied to the input end, the output end (ultrasonic transducer 750) will swing around the rotatably connected position as the rotation axis 763. The base support 760 can be fixedly installed in the mounting cavity 610 or movably installed in the mounting cavity 610; no special limitation is made here. The magnetic body 931 has the same properties as the magnetic components mentioned in the above embodiment, and is a component with magnetic adsorption capabilities (such as magnets, magnets, electromagnets 930, etc.) or the ability to be magnetically adsorbed (such as metallic iron or iron-containing alloys). Electromagnet 930 and magnetic body 931 are arranged adjacent to each other with their magnetic poles facing each other. When electromagnet 930 is energized, magnetic attraction or repulsion can occur between them. Specifically, when electromagnet 930 is not energized, electromagnet 930 and magnetic body 931 can remain relatively stationary without any magnetic interaction. When electromagnet 930 is energized, taking an example where electromagnet 930 is mounted on the swing structure 770 and magnetic body 931 is fixedly mounted on the base support 760, electromagnet 930 can change its magnetic poles to achieve attraction (approach) and repulsion (distance) with magnetic body 931, thereby causing the output end to drive the ultrasonic transducer 750 to move in the opposite direction to the input end.

[0221] In this embodiment, the swing structure 770 is rotatably mounted on the base support 760. An ultrasonic transducer 750 is installed at one end of the swing structure 770, and one of an electromagnet 930 and a magnetic body 931 is installed at the other end. The other electromagnet 930 and magnetic body 931 are fixedly mounted on the base support 760. When the ultrasonic transducer 750 is not needed to move, the electromagnet 930 is de-energized (the electromagnet 930 and magnetic body 931 do not magnetically attract or repel each other, or they are stably magnetically attracted together). When the ultrasonic transducer 750 needs to move, the movement is achieved. When the ultrasonic transducer 750 moves, energizing the electromagnet 930 causes magnetic attraction or repulsion between the electromagnet 930 and the magnetic body 931, thereby moving the input end of the oscillating structure 770 and achieving the purpose of moving the ultrasonic transducer 750. In this embodiment, the movement of the ultrasonic transducer 750 is achieved by using the electromagnet 930 and the magnetic body 931. Compared with using components such as the drive motor 910, air pump, and hydraulic pump, the drive mechanism 900 is greatly simplified, and the cost of driving the ultrasonic transducer 750 is greatly reduced, as well as the production cost of the cutter head 20.

[0222] In some embodiments, in order to increase the swing stroke of the ultrasonic transducer 750, the number of electromagnets 930 or magnetic bodies 931 is increased, and examples are given below.

[0223] When an electromagnet 930 is added, the electromagnet 930 includes a first electromagnet 932 and a second electromagnet 933. A magnetic body 931 is connected to the end of the oscillating structure 770 away from the transducer. The first electromagnet 932 and the second electromagnet 933 are located on opposite sides of the magnetic body 931, or the first electromagnet 932 is connected to the end of the oscillating structure 770 away from the transducer, and the second electromagnet 933 and the magnetic body 931 are located on opposite sides of the first electromagnet 932. In this embodiment, the magnetic body 931 is taken as an iron body. When the magnetic body 931 is installed on the oscillating structure 770, the first electromagnet 932 and the second electromagnet 933 are located on opposite sides of the magnetic body 931. At this time, when the first electromagnet 931 is energized, the magnetic body 931 attracts the first electromagnet 932, and when the second electromagnet 931 is energized, the magnetic body 931 attracts the second electromagnet 933.

[0224] When adding magnetic bodies 931, there are two magnetic bodies 931. The electromagnet 930 is connected to the end of the oscillating structure 770 away from the transducer. The two magnetic bodies 931 are located on opposite sides of the electromagnet 930, and the magnetic poles of the ends of the two magnetic bodies 931 facing the electromagnet 930 are the same. In this embodiment, the two magnetic bodies 931 are both magnets, and the two magnets are arranged opposite each other with the same magnetic poles at their opposite ends, that is, both are N poles or both are S poles.

[0225] An electromagnet 930 is positioned at the input end of the oscillating structure 770, located between two magnets, with its two poles corresponding to the ends of the two magnets. When the electromagnet 930 is energized, one end of it is the N pole, and the other end is the S pole. Taking an example where the adjacent poles of the two magnets are both N poles, when the electromagnet 930 is energized, its S pole attracts one of the N-pole magnets, while its N pole repels the other. When the polarity of the electromagnet 930 reverses, it moves in the opposite direction, causing the oscillating structure 770 to drive the ultrasonic transducer 750 to oscillate in the opposite direction.

[0226] In some embodiments, to improve the ease of installing the magnetic body 931 or electromagnet 930, the base support 760 includes a main support 761 and mounting lugs 762. The mounting lugs 762 protrude away from the ultrasonic transducer 750, and the magnetic body 931 or electromagnet 930 is mounted on the mounting lugs 762. The mounting lugs 762 can take many forms, such as being plate-shaped or rod-shaped, and are not specifically limited here. The mounting lugs 762 protrude from the main support 761, providing more space for the installation of the electromagnet 930 or magnetic body 931, which is beneficial to improving installation efficiency. In some embodiments, there are two mounting lugs 762, which are located on opposite sides of the swing structure 770. When both mounting lugs 762 are used, it is beneficial to improve the installation flexibility of the electromagnet 930 or magnetic body 931, allowing for selection of installation according to specific working conditions, making the base support 760 suitable for different working conditions and improving adaptability. When both mounting lugs 762 are used simultaneously, the utilization rate of the base bracket 760 is improved, which also helps to increase the drive stroke of the drive mechanism 900.

[0227] There are many ways in which the swing structure 770 and the base support 760 can be rotatably connected, as illustrated below. In some embodiments, one of the base support 760 and the swing structure 770 is provided with a rotating shaft 763, and the other is provided with a rotating hole 771. The rotating shaft 763 is inserted into the rotating hole 771, so that the swing structure 770 and the base support 760 are rotatably connected. In this embodiment, the swing structure 770 and the base support 760 are rotatably connected through a shaft-hole fit. The rotating shaft 763 can be provided on the swing structure 770 (with the rotating hole 771 provided on the base support 760), or it can be provided on the base support 760 (with the rotating hole 771 provided on the swing structure 770). Of course, in some embodiments, in order to improve the swing flexibility of the swing structure 770, a bearing can be provided in the rotating hole 771, thereby reducing the resistance to the rotation of the rotating shaft 763.

[0228] In some embodiments, to improve the stability of the fit between the rotating shaft 763 and the rotating hole 771, the free end of the rotating shaft 763 passes through the rotating hole 771 and is exposed. The cutter head 20 also includes a locking member 780, the radial dimension of which is larger than the radial dimension of the rotating hole 771, and the locking member 780 is engaged with the free end of the rotating shaft 763. In this embodiment, there are many ways to connect the locking member 780 to the free end, such as by snap-fit ​​connection, by threaded connection, or by fasteners 852 such as screws. The locking member 780 can take many forms, such as circular, square, or annular, etc., without any special limitation. Taking an annular card with an opening as an example, the free end of the rotating shaft 763 has a locking groove, and the inner side of the locking member 780 has a locking protrusion. When the locking member 780 is sleeved on the free end, the locking protrusion is inserted into the locking groove, so that the locking member 780 is fixed to the free end. By setting the locking component 780, the free end of the rotating shaft 763 cannot be disengaged from the rotating hole 771, thereby improving the stability of the fit between the rotating shaft 763 and the rotating hole 771.

[0229] In some embodiments, to avoid excessive swing amplitude of the swing structure 770 and improve the stability of the swing structure 770, a rotating shaft 763 is provided on the base support 760, and the swing mechanism has a rotating part 772 with a rotating hole 771. An abutment 773 is provided on the outer wall of the rotating part 772, and a stop 765 is provided on the base support 760 adjacent to the rotating part 772. During the rotation of the rotating part 772, the stop 765 abuts against the abutment 773 to prevent the rotating part 772 from continuing to rotate. Specifically, in this embodiment, the shape of the abutment 773 can be varied, including protrusions, protrusions, protrusions, etc. Taking a protrusion with an abutment surface as an example, the abutment surface can be flat or curved. The abutment surface is the contact surface when the abutment 773 contacts the stop 765. The abutment 773 is located on the peripheral sidewall of the lower part of the rotating part 772, and rotates accordingly when the rotating part 772 rotates. A stop 765 is formed on the side of the base bracket 760 where the mounting lug 762 is provided. When the rotating part 772 rotates a certain angle, the abutment 773 abuts against the stop 765, preventing the abutment 773 from moving further and thus stopping the rotating part 772 from continuing to rotate. This avoids the ultrasonic transducer 750 from colliding with the side wall of the housing 600 due to excessive swing amplitude of the swing structure 770, and also avoids instability in the installation of the swing structure 770 due to excessive swing amplitude. In some embodiments, to effectively limit both sides of the swing structure 770, there are corresponding stop 765s and abutment 773s to cooperate and limit the rotation regardless of whether the swing structure 770 rotates clockwise or counterclockwise. There are two abutment tops 773, which are located on both sides of the peripheral sidewall of the rotating part 772; there are two stop parts 765, which are located on the base supports 760 on both sides of the rotating part 772, and are used to stop the two abutment tops 773 respectively.

[0230] In some embodiments, to improve the continuity of the oscillation, the transducer assembly 700 further includes a reset member 790. The reset member 790 includes an assembly portion 791 and a first elastic arm 792 and a second elastic arm 793 connected to both ends of the assembly portion 791. The assembly portion 791 is sleeved at the connection between the oscillation structure 770 and the base support. The first elastic arm 792 is connected to one end of the oscillation mechanism near the ultrasonic transducer 750, and the second elastic arm 793 is connected to the base support 760. Specifically, in this embodiment, the reset member 790 can take many forms; in this embodiment, a torsion spring structure is used as an example. By sleeved the assembly portion 791 at the connection between the oscillation structure 770 and the base support, and simultaneously connecting the first elastic arm 792 to the oscillation structure 770 and the second elastic arm 793 to the base support 760, at least one of the first elastic arm 792, the second elastic arm 793, and the reset portion undergoes elastic deformation during the oscillation of the oscillation structure 770. When the electromagnet 930 and the magnetic body 931 stop cooperating, the elastically deformed component, under the action of elastic restoring force, drives the swing structure 770 to return to its initial position. The setting of the reset component 790 allows the swing structure 770 to easily return to its initial position, which is beneficial for the continuous swing of the swing structure 770.

[0231] In some embodiments, a rotating shaft 763 is provided on the base support 760, and the swing mechanism has a rotating part 772 with a rotating hole 771. The rotating shaft 763 is inserted into the rotating hole 771 so that the swing structure 770 is rotatably connected to the base support 760. The rotating part 772 has an assembly post 775, and an assembly part 791 is sleeved on the assembly post 775. The rotating hole 771 is coaxially arranged with the assembly post 775. The rotating hole 771 is formed on the assembly post 775 and extends through it along the length of the assembly post 775. To improve the compactness of the structure and the installation stability of the assembly part 791, the rotating part 772 has an assembly ring groove 776, and the outer wall of the assembly post 775 is the groove wall of the assembly ring groove 776. An assembly elongated groove 777 is formed on the rotating structure, and the assembly elongated groove 777 communicates with the assembly ring groove 776. The first connecting arm 843 extends from the assembly ring groove 776 to the assembly elongated groove 777 and is fixed. A limiting groove 766 is provided on the base support 760 near the rotating part 772, and the second elastic arm 793 is installed in the limiting groove 766.

[0232] Specifically, in this embodiment, one end of the assembly part 791 is close to the bottom of the assembly ring groove 776, and the other end is close to the opening of the assembly ring groove 776. A first elastic arm 792 is disposed at the end of the assembly part 791 near the bottom of the groove, and a second elastic arm 793 is disposed at the end of the assembly part 791 near the opening of the groove. Thus, the first elastic arm 792 needs to enter the assembly long groove 777 through the connection between the assembly ring groove 776 and the assembly long groove 777, while the second elastic arm 793 can directly extend from the opening of the assembly ring groove 776 and enter the limiting groove 766. In this embodiment, the assembly ring groove 776 can accommodate the assembly part 791, protecting it and preventing external environmental factors from affecting its installation, thus improving installation stability. The assembly long groove 777 allows the first connecting arm 843 to be accommodated, avoiding occupying space outside the swing structure 770, and also improves the compactness of the connection between the first connecting arm 843 and the swing structure 770, thereby improving installation stability. Similarly, by setting the limiting groove 766, the second connecting arm 844 can be accommodated, avoiding occupying space outside the base support 760, and at the same time, it helps to improve the compactness and stability of the connection between the second connecting arm 844 and the base support 760.

[0233] In some embodiments, to improve the space utilization and structural compactness within the mounting cavity 610, the cutter head 20 further includes a sealing telescopic tube 810, a balancing telescopic tube 830, and a connecting structure connecting the sealing telescopic tube 810 and the balancing telescopic tube 830; the connecting structure has a clearance opening 842 through which the swing structure 770 passes. In this embodiment, the clearance opening 842 allows the swing structure 770 to extend directly along the height direction of the base support 760 without turning. This simplifies the swing structure 770 and improves the rationality of component layout, thus enhancing space utilization. In some embodiments, to increase the swing amplitude of the ultrasonic transducer 750, the distance from the ultrasonic transducer 750 to the rotating connection is greater than the distance from the end where the electromagnet 930 or magnetic body 931 is located to the rotating connection position. In this case, the input end of the swing structure 770 only needs to swing with a small amplitude for the ultrasonic transducer 750 to achieve a large swing displacement.

[0234] In some embodiments, to improve the movement range of the ultrasonic transducer 750, the base support 760 includes a first support boss 718 and a second support boss 719 spaced apart; two guide rods 730 are also provided inside the housing 600, with their ends connected to the inner sidewall of the housing 600 respectively; the two guide rods 730 pass through the first support boss 718 and the second support boss 719 respectively; the base support 760 is slidably connected to the guide rods 730. Specifically, in this embodiment, the base support 760 cooperates with the guide rods 730, which can be referred to in the above embodiment for the cooperation between the first support 711 and the guide rods 730, and will not be repeated here. By setting the base support 760 to be movable along the guide rods 730, the movement range of the ultrasonic transducer 750 is significantly increased.

[0235] This application further proposes a skin treatment device including the blade 20 in the above embodiment (using the cooperation of electromagnet 930 and magnet 931 as a drive mechanism 900). The skin treatment device includes a handheld part 10 and a blade 20, with one end of the blade 20 connected to the handheld part 10. The handheld part 10 includes a drive assembly 210 and a drive shaft 250 pulverizedly connected to the drive assembly 210. The drive end of the drive shaft 250 is used to connect to the transducer assembly 700 of the blade 20. The housing 600 of the blade 20 has an acoustic wave outlet 611. The drive assembly 210 drives the transducer assembly 700 to move along a first direction via the drive shaft 250, and the drive mechanism 900 of the blade 20 drives the ultrasonic transducer 750 of the blade 20 to move along a second direction. The first and second directions are intersected to define a path surface. When the transducer assembly 700 moves within the path surface, the distance between the transducer assembly 700 and the acoustic wave outlet 611 is substantially the same.

[0236] The above embodiments have basically described the structures related to the vent 613 and the connecting hole 612 within the housing 600. The following describes the structures related to the acoustic wave outlet 611. There are many ways to seal the acoustic wave outlet 611 using the encapsulation membrane structure 950; examples will be provided below to illustrate these methods within the overall technical solution.

[0237] Please see Figures 23 to 29In some embodiments, a blade 20 for a skin treatment device includes: a housing 600 having a mounting cavity 610 and an acoustic wave outlet 611 penetrating a side wall of the housing 600; a transducer assembly 700 disposed within the mounting cavity 610, corresponding to the acoustic wave outlet 611, with the ultrasonic emission direction of the transducer assembly 700 facing the acoustic wave outlet 611; and an encapsulation membrane structure 950 disposed on the housing 600, comprising a layered acoustically permeable membrane 951, an insulating support sheet 952, and a touch-sensitive flexible circuit board 953; the acoustically permeable membrane 951 covers the acoustic wave outlet 611, and the insulating support sheet 952 and the flexible circuit board are located between the acoustically permeable membrane 951 and the housing 600. The touch-sensitive flexible circuit board 953 is used for electrical connection with an electronic control board.

[0238] Specifically, in this embodiment, the acoustic membrane 951 can take many forms. Taking an insulating film as an example, it can be a PI film (Polyimide Film). The area of ​​the acoustic membrane 951 is larger than the area of ​​the sound wave outlet 611, and the edge of the acoustic membrane 951 overlaps with the edge of the sound wave outlet 611 to ensure that the acoustic membrane 951 can completely cover the sound wave outlet 611. The insulating support sheet 952 is located between the acoustic membrane 951 and the touch flexible circuit board 953, and is used to cover the touch flexible circuit board 953 to increase the strength of the flexible circuit board. During the use of the cutter head 20, when the external environment applies pressure to the acoustic membrane 951, the insulating support sheet 952 can be stressed before the touch flexible circuit board 953, thereby reducing the pressure of the external pressure on the touch flexible circuit board 953. The material of the insulating support sheet 952 can be many, and no special limitation is made here. For example, it can be a resin-based material, such as glass fiber epoxy resin. The flexible touch circuit board 953 is electrically connected to the control board of the blade head 20. The flexible touch circuit board 953 senses the skin contact of the acoustic wave outlet 611. When the flexible touch circuit board 953 detects that the acoustic wave outlet 611 is only partially in contact with the skin, it indicates that the position (or orientation) of the blade head 20 is unreasonable, and the skin contact effect of the acoustic wave outlet 611 is poor. In this case, if the ultrasonic transducer 750 emits ultrasound waves, a large amount of ultrasonic energy will be wasted, and the ultrasound waves will not be able to penetrate the designated location (depth) of the skin, thus failing to achieve the expected therapeutic effect and significantly reducing the therapeutic effect of the skin treatment device. Conversely, only when the position of the acoustic wave outlet 611 has a high degree of skin contact with the human skin will the electrical signal generated by the flexible touch circuit board 953 cause the control board to control the transducer assembly 700 to work. This ensures that the ultrasonic energy can effectively penetrate the preset location (depth) of the human skin, thereby ensuring the effectiveness of the skin treatment device.

[0239] In this embodiment, by stacking the acoustic membrane 951, the insulating support plate 952, and the touch flexible circuit board 953 at the sound wave outlet 611, when external pressure is applied to the acoustic membrane 951, the insulating support plate can withstand the pressure before the touch flexible circuit board 953, thereby reducing the pressure borne by the touch flexible circuit board 953. Especially when subjected to a large external pressure, such as when the blade 20 falls and the side of the housing 600 with the sound wave outlet 611 hits the ground, the encapsulation membrane structure 950 will be subjected to a large impact force. At this time, the insulating support plate can not only bear the main impact force and prevent the touch flexible circuit board 953 from being damaged due to excessive pressure, but also play a buffering role, which can reduce the deformation range of the acoustic membrane 951 (within the range of elastic deformation) and slow down the deformation speed of the acoustic membrane 951, preventing it from being torn due to excessive deformation range and deformation speed, which is beneficial to protecting the acoustic membrane 951.

[0240] In some embodiments, the acoustic membrane 951 includes a connection area and an acoustically transparent area. The connection area is disposed corresponding to the housing 600 that surrounds the sound wave outlet 611, and the acoustically transparent area is disposed corresponding to the sound wave outlet 611. The insulating support sheet 952 and the touch flexible circuit board 953 are disposed corresponding to the connection area. With this configuration, during the use of the blade 20, the touch flexible circuit board 953 can be protected by the insulating support sheet 952 and supported by the housing 600, avoiding the touch flexible circuit board 953 from being subjected to force and thus not receiving effective support, which helps to improve the stability of the touch flexible circuit board 953 in use.

[0241] In some embodiments, the touch-sensitive flexible circuit board 953 includes a touch portion and an electrical connection portion. One end of the electrical connection portion is connected to the touch portion, and the other end is electrically connected to the main control board 153 of the blade head 20. The touch portion is annularly arranged, and the inner ring sidewall of the touch portion is flush with the inner sidewall of the acoustic wave outlet 611. This allows the touch portion to have a larger area while preventing it from protruding from the inner sidewall of the acoustic wave outlet 611 and being easily damaged, and also preventing the touch portion from obstructing the passage of acoustic waves, thus ensuring that the acoustic wave outlet 611 has a sufficient effective area. The insulating support sheet 952 is annularly arranged, and the inner ring sidewall of the insulating support sheet 952 is flush with the inner sidewall of the acoustic wave outlet 611. This prevents the insulating support sheet 952 from blocking the acoustic wave outlet 611 and obstructing the passage of acoustic waves, ensuring that the acoustic wave outlet 611 has a sufficient effective area and guaranteeing the transmission efficiency of ultrasonic waves.

[0242] In some embodiments, to improve the connection reliability of the acoustic membrane 951, the insulating support sheet 952, and the flexible touch circuit board 953, a first molten adhesive layer is provided between the acoustic membrane 951 and the insulating support sheet 952; and / or, a second molten adhesive layer is provided between the flexible touch circuit board 953 and the insulating support sheet 952. The first molten adhesive layer and the second molten adhesive layer can be formed by providing hot melt adhesive, or by melting adjacent structures together through a hot melt process.

[0243] In some embodiments, to balance the installation stability of the acoustic membrane 951 and the ultrasonic wave transmission rate, the acoustic membrane 951 includes a connecting area and a sound-transmitting area. The sound-transmitting area is disposed corresponding to the housing 600 surrounding the sound wave outlet 611, and the sound-transmitting area is disposed corresponding to the sound wave outlet 611. The area ratio of the sound-transmitting area to the acoustic membrane 951 is 0.43-0.63, and can be 0.45, 0.47, 0.51, 0.52, 0.53, 0.54, 0.55, 0.57, 0.59, or 0.61; and / or, the area of ​​the sound-transmitting area is 460 mm². 2 -520 mm 2 It can be 480mm 2 -500 mm 2 And / or, the length of the sound-permeable membrane 951 is 32.8mm-52.8mm, which can be 37.8mm-47.8mm, 39.8mm-45.8mm, etc.; and / or, the width of the sound-permeable membrane 951 is 16.8mm-26.8mm, which can be 18.8mm-23.8mm, 20.8mm-22.8mm, etc.; and / or, the thickness of the sound-permeable membrane 951 is 0.035mm-0.065mm, which can be 0.038mm-0.062mm, 0.045mm-0.058mm, etc. Specifically, in this embodiment, the area ratio of the sound-permeable area to the area of ​​the sound-permeable membrane 951 should not be too large or too small. When the area ratio of the sound-transmitting area to the sound-transmitting membrane 951 is greater than 0.63, it indicates that the area of ​​the sound-transmitting area occupies too large a proportion of the entire sound-transmitting membrane 951. In this case, the tensile force exerted on the middle part of the sound-transmitting area by the connecting area is too small, making it prone to significant fluctuations and damage. When the area ratio of the sound-transmitting area to the sound-transmitting membrane 951 is less than 0.43, it indicates that the area of ​​the sound-transmitting area occupies too small a proportion of the entire sound-transmitting membrane 951. In this case, the proportion of the area of ​​the sound-transmitting membrane 951 that allows ultrasound waves to pass through is small, affecting the ultrasound transmission rate.

[0244] In some embodiments, to balance the protection and tactile sensitivity of the flexible touch circuit board 953, the thickness ratio of the insulating support sheet 952 to the flexible touch circuit board 953 is 2-4, such as 2.5-3.5, 2.7-3.2, etc.; and / or, the thickness of the insulating support sheet 952 is 0.2mm-0.4mm, such as 0.25mm-0.35mm, 0.27mm-0.32mm, etc.; and / or, the thickness of the flexible touch circuit board 953 is 0.05mm-0.15mm, such as 0.07mm-0.12mm, 0.09mm-0.1mm, etc. Specifically, in this embodiment, the thickness ratio of the insulating support sheet 952 to the flexible touch circuit board 953 cannot be too small or too large. When the thickness ratio of the insulating support sheet 952 to the flexible touch circuit board 953 is greater than 4, it indicates that the thickness of the insulating support sheet 952 exceeds the thickness of the flexible touch circuit board 953 by too much. In this case, touch insensitivity may occur, affecting the user's touch experience. When the thickness ratio of the insulating support sheet 952 to the flexible touch circuit board 953 is less than 2, it indicates that the thickness of the insulating support sheet 952 exceeds the thickness of the flexible touch circuit board 953 by only a small amount. In this case, the flexible touch circuit board 953 is prone to damage due to insufficient thickness of the insulating support sheet 952, which is detrimental to the protection of the flexible touch circuit board 953 provided by the insulating support sheet 952.

[0245] In some embodiments, to improve the installation stability of the encapsulation membrane structure 950, the encapsulation membrane structure 950 further includes a foam adhesive layer 954. One side of the foam adhesive layer 954 is attached to the housing 600 surrounding the acoustic wave outlet 611, and the other side is attached to the touch flexible circuit board 953. Specifically, in this embodiment, the foam adhesive layer 954 has adhesive properties on both sides and a certain degree of adhesive layer. By providing the foam adhesive layer 954, not only can the encapsulation membrane structure 950 be conveniently installed onto the housing 600 surrounding the acoustic wave outlet 611, but it can also provide a certain buffering effect on the acoustic membrane 951, the insulating support sheet 952, and the touch flexible circuit board 953, which is beneficial to improving the drop resistance of the blade 20.

[0246] In some embodiments, the blade head 20 further includes a decorative shell 670, which is connected to the outer wall of the housing 600. The decorative shell 670 has an avoidance opening 671, which corresponds to the acoustic wave outlet 611. The avoidance opening 671 is sleeved on the outside of the encapsulation membrane structure 950. Specifically, in this embodiment, since the decorative shell 670 and the housing 600 are separate, the material, shape, and color of the decorative shell 670 and the housing 600 can be different. When the materials of the decorative shell 670 and the housing 600 are different, the overall texture of the blade head 20 can change, as can its load-bearing capacity and impact resistance. The overall shape of the blade head 20 can be adjusted by setting the decorative shell 670, so that the blade head 20 can better adapt to the structure of the handheld component 10, or better meet the design or user's requirements for shape. By adjusting the color of the decorative shell 670, the overall appearance color of the blade head 20 can better meet the design or user's needs. By aligning the clearance opening 671 with the acoustic wave outlet 611, the decorative shell 670 ensures that the ultrasonic waves are not affected by the emission from the acoustic wave outlet 611. Simultaneously, by fitting the clearance opening 671 onto the outer side of the encapsulation membrane structure 950, the decorative shell 670 protects the outer periphery of the encapsulation membrane structure 950, preventing it from being subjected to external forces from the outer periphery (radial), thus improving the installation stability of the encapsulation membrane structure 950.

[0247] In some embodiments, to further improve the installation stability of the encapsulation membrane structure 950, the outer surface of the acoustic membrane 951 does not protrude beyond the top of the edge of the clearance opening 671; and / or, the inner wall of the clearance opening 671 abuts against the outer wall of the encapsulation membrane structure 950. In this embodiment, by ensuring that the outer surface of the acoustic membrane 951 does not protrude beyond the top of the edge of the clearance opening 671, the acoustic membrane 951 is protected by the decorative shell 670 surrounding the clearance opening 671, preventing the acoustic membrane 951 from bearing external forces alone. By abutting against the inner wall of the clearance opening 671 against the outer wall of the encapsulation membrane structure 950, the outer wall of the encapsulation membrane structure 950 is supported and restrained, preventing it from shaking or shifting under external forces.

[0248] In some embodiments, to improve the ease of disassembly of the housing 600 and the decorative shell 670, the edge of the acoustic outlet 611 has an annular boss 615, and the encapsulation film structure 950 is mounted on the annular boss 615; a fitting gap 955 is left between the annular boss 615 and the housing 600 and the decorative shell 670. In this embodiment, the fitting gap 955 is provided to avoid excessive tightness between the two, allowing the housing 600 and the decorative shell 670 to be easily disassembled. Meanwhile, in some embodiments, the fitting gap 955 communicates with the vent hole 613 of the housing 600, and the fitting gap 955 facilitates the passage of gas through the vent hole 613.

[0249] In other embodiments, to provide connection strength between the decorative shell 670 and the housing 600, and to improve the sealing performance of the fit between the decorative shell 670 and the housing 600, preventing dust, water, insects, etc. from the external environment from entering between the decorative shell 670 and the housing 600 through the fit gap 955, a sealant structure is provided within the fit gap 955.

[0250] The above embodiments mainly describe the structure of the blade 20 in the skin treatment device. The following mainly describes the specific structure of the handheld component 10. The handheld component 10 includes a housing 100, a drive assembly 210 disposed within the housing 100, and a vibration damping structure for damping the drive assembly 210; button structures (unlock button 510 structure, trigger button 133 structure) disposed on the housing 100, and decorative component 183 structure disposed on the housing 100. Similarly, we will first describe the overall structure of the handheld component 10, and then integrate the specific structure of the handheld component 10 into the complete technical solution for explanation.

[0251] The outer casing 100 includes a main casing 110 and a back casing 120. The main casing 110 has a front side 160 and a back side 150 disposed opposite to each other. The main casing 110 has a mounting cavity 151, the opening 152 of which faces the back side 150. The back casing 120 is connected to the main casing 110 to cover the opening 152. In some embodiments, a front casing may be provided on the front side 160 of the main casing 110. The main casing 110 has a head 112 and a tail 113 disposed opposite to each other. The head 112 has a mounting groove 170 for mounting a cutting head 20. The mounting groove 170 has a mounting opening 171 for exposing the sound-emitting area 21 of the cutting head 20. The mounting cavity 151 communicates with the mounting groove 170 through a clearance hole 111. The drive assembly 210 includes a drive motor 220 and a transmission mechanism 920. One end of the drive shaft 250 is connected to the transmission mechanism 920, and the other end passes through the clearance hole 111 and enters the mounting groove 170 to connect with the transducer assembly 700 of the cutter head 20, so as to drive the transducer assembly 700 to move within the housing 600.

[0252] The structural features of the housing 100 are described below with reference to the complete embodiment.

[0253] Please see Figures 30 to 32 ,as well as Figures 1 to 4An ultrasonic beauty device for skin treatment includes a housing 100 and a blade 20. The housing 100 has a head 112 and a tail 113. A gripping area 140 and a placement groove 130 are formed between the head 112 and the tail 113. The placement groove 130 extends along the length of the housing 600 and at least a portion of the placement groove 130 is located within the gripping area 140. The placement groove 130 is used to place a finger when a user holds the ultrasonic beauty device. The blade 20 is disposed in the head 112 and has a mounting cavity 610, a sound output area 21, and an ultrasonic transducer 750 disposed in the mounting cavity 610. The ultrasonic transducer 750 is used to generate ultrasonic energy that passes through the sound output area 21 and is injected into the skin to be treated.

[0254] Specifically, in this embodiment, the head 112 is larger in volume (occupies more space), while the tail 113 is smaller in volume. The grip area 140 is for the user to hold during use, and the width of the grip area 140 gradually decreases from the head 112 to the tail 113, so that the grip area 140 can be suitable for users with different hand sizes. The blade 20 can be detachably connected to the head 112 or non-detachably connected to the head 112 (that is, the blade 20 and the head 112 are integrally set). The specific structure of the blade 20 can be referred to the above embodiment, and will not be repeated here. Among them, the sound output area 21 corresponds to the area where the sound wave outlet 611 is located on the housing 600. It is worth noting that the blade 20 in this embodiment is a beauty ultrasound head that uses ultrasonic waves emitted by the ultrasonic transducer 750 for physiotherapy. The cross-sectional shape of the placement groove 130 can be many, such as U-shaped, V-shaped, rectangular with an opening, square with an opening, circular with an opening, etc., and no special limitation is made here. The placement groove 130 can take many forms; for example, the placement groove 130 is a continuous, complete groove. The placement groove 130 extends along the length of the outer shell 100, and the length of the placement groove 130 can be 1 / 3 to 5 / 6 of the length of the outer shell 100. In this embodiment, the placement groove 130 extends from the head 112 to the tail 113 of the outer shell 100 as an example.

[0255] In this embodiment, there are two common ways for the user to hold the ultrasonic beauty device. The first way is to have the thumb, palm, and four fingers all encircle the outer shell 100 to form a ring. In this case, the fingertips of the four fingers can hook into the placement groove 130. The placement groove 130 provides a point of force for the four fingers, which is conducive to the force exerted by the four fingers and greatly increases the stability of the four fingers acting on the outer shell 100. The second way is to hold the palm and four fingers around the outer shell 100, and press the thumb into the placement groove 130 along the length of the placement groove 130 to cooperate with the four fingers and palm. In this case, the placement groove 130 can provide a stable and comfortable placement position for the thumb, which is conducive to the thumb exerting force better and improving the stability of the grip.

[0256] In some embodiments, to further improve the ease of use for the user holding the ultrasonic beauty device, the sound-emitting area 21 is positioned facing the side of the outer casing 100, and the sound-emitting area 21 and the placement slot 130 face the same side of the outer casing 100. In this embodiment, the sound-emitting area 21 and the placement slot 130 can simultaneously face the same side of the outer casing 100, without limitation to any specific side. For example, it can be any one of the front side 160, the back side 150, the left side, and the right side, or other lateral orientations. By setting the orientation of the sound-emitting area 21 and the placement slot 130 to be consistent, the user can use the orientation of the placement slot 130 to locate the orientation of the sound-emitting area 21 when using the ultrasonic beauty device (it is inconvenient for the user to visually observe the orientation of the sound-emitting area 21 during use). This allows the user to very accurately control the sound-emitting area 21 to be aligned with the human skin, which improves the ease of use for the user. Specifically, the housing 100 has a back side 150 and a front side 160 disposed opposite to each other. The head 112 has a mounting groove 170, in which the cutting head 20 is mounted. The mounting groove 170 has a mounting opening 171 for exposing the sound output area 21. The mounting opening 171 and the sound output area 21 face the front side 160. A placement groove 130 is formed on the front side 160 of the housing 100. To facilitate button operation, an activation button 133 is provided at one end of the placement groove 130 near the head 112. The activation button 133 is used to control the operation of the cutting head 20. And / or, the cutting head 20 is detachably connected to the head 112 via a locking structure 500. The locking structure 500 includes an unlocking button 510, which is used to release the locking of the cutting head 20 and the head 112. The unlocking button 510 is located in the placement groove 130 near the head 112. Specifically, in this embodiment, the activation button 133 is electrically connected to the main control board 153 of the ultrasonic beauty instrument. When the user presses the activation button 133, the ultrasonic transducer 750 emits ultrasonic waves; when the user releases the activation button 133, the ultrasonic transducer 750 stops emitting ultrasonic waves. The activation button 133 in this embodiment can be understood as a "single-time emission button," which is different from the power switch of the ultrasonic beauty instrument. Of course, in other embodiments, the activation button 133 can also be a button that, when pressed, causes the ultrasonic transducer 750 to continuously emit ultrasonic waves. When the thumb is placed in the placement slot 130, the activation button 133 can be clicked very conveniently, which is beneficial for the user to accurately and conveniently control the operation of the ultrasonic transducer 750. The locking structure 500 can be implemented in many ways. For example, the blade 20 can be locked to the head 112 by a snap-fit, by a magnetic component, or by a locking structure, etc. No limitation is made here; specific structures can be found in later embodiments. When it is necessary to unlock the blade 20 from the head 112, simply place your thumb in the placement slot 130 and press the unlock button 510 with your thumb. This unlocking process is very convenient and comfortable, which helps to improve the user experience.

[0257] In some embodiments, to avoid accidental button presses, the top of the activation button 133 does not protrude from the edge of the placement groove 130; and / or, the top of the unlock button 510 does not protrude from the edge of the placement groove 130. Specifically, in this embodiment, by setting the top of the activation button 133 and / or the top of the unlock button 510 to not protrude from the edge of the placement groove 130, the activation button 133 and / or the unlock button 510 are housed within the placement groove 130. This prevents accidental presses of the activation button 133 and the unlock button 510 during the movement and holding of the ultrasonic beauty device, avoids the blade head 20 from being unlocked due to accidental presses, and also prevents the ultrasonic transducer 750 from emitting ultrasonic waves due to accidental presses. This improves the reliability of the ultrasonic beauty device.

[0258] In some embodiments, to improve the comfort of holding the handheld component 10, the ratio of the width to the length of the placement groove 130 is 2 / 27-7 / 27, or can be 3 / 27-5 / 27, etc.; and / or, the width of the placement groove 130 is 1mm-4mm, or can be 2mm-3mm, etc.; and / or, the length of the placement groove 130 is 5mm-18mm, or can be 7mm-15mm, or can be 9mm-12mm, etc. In this embodiment, the ratio of the width to the length of the placement groove 130 cannot be too large or too small. When the ratio of the width to the length of the placement groove 130 is less than 2 / 27, it indicates that the width is too small compared to the length, which is not conducive to the user placing their thumb in the placement groove 130. When the ratio of the width to the length of the placement slot 130 is greater than 7 / 27, it means that the width of the slot is too large compared to the length of the slot. When the user holds the outer shell 100, the placement slot 130 will press against the palm or fingers, causing discomfort when the user holds it and making it difficult for the user to use.

[0259] In some embodiments, the housing 100 has a back side 150 and a front side 160 disposed opposite to each other, a placement groove 130 is formed on the front side 160, and a gripping area 140 includes a placement groove 130 located in the gripping area 140, a first gripping surface 121 located on the back side 150, and two second gripping surfaces 115. The two second gripping surfaces 115 are respectively located on opposite sides of the first gripping surface 121, and one second gripping surface 115 connects the first gripping surface 121 with the groove edge of one side of the placement groove 130. The first gripping surface 121 is arc-shaped or generally arc-shaped. The second gripping surface 115 is curved, sloping from the head 112 to the tail 113. The second gripping surface 115 is also inclined in the direction from the back side 150 to the front side 160. The two second gripping surfaces 115 are arranged in a figure-eight shape, causing the width of the gripping area 140 to gradually decrease from the head 112 to the tail 113, thus facilitating gripping for users with different hand sizes. In some embodiments, a first ridge 116 is formed at the intersection of the first gripping surface 121 and the second gripping surface 115, and / or a second ridge 117 is formed at the intersection of the first gripping surface 121 and the edge of the groove 130. The first ridge 116 and / or the second ridge 117 extend along the length of the outer casing 100. When holding the ultrasonic beauty device, the first ridge 116 and / or the second ridge 117 can provide a point of leverage for the fingers or palm, facilitating a more reliable grip.

[0260] In some embodiments, the width of the first gripping surface 121 is greater than the width of the groove 130, and / or the ratio of the width B1 of the first gripping surface 121 to the width B2 of the groove 130 is 3-1.5, or can be 2.5-2, etc. In this embodiment, by setting the width of the first gripping surface 121 to be greater than the width of the groove 130, when the user holds the device, the position of the palm can be aligned with the first gripping surface 121, allowing the palm to make large-area contact with the first gripping surface 121, while the fingertips of the four fingers or the thumb are positioned to correspond to the groove 130, which is beneficial for the user's grip. The ratio between the width of the first gripping surface 121 and the width of the groove 130 should not be too large or too small. When the ratio is greater than 3, it indicates that the width of the first grip surface 121 exceeds the width of the groove 130 by too much. In this case, the palm can hardly cover the first grip surface 121. On the other hand, if the width of the groove 130 is too small, it cannot properly fit with the fingertips of the thumb or four fingers, which is not conducive to the user's grip. When the ratio is less than 1.5, it indicates that the width of the first grip surface 121 exceeds the width of the groove 130 by too little. In this case, the palm's coverage area exceeds the first grip surface 121. On the other hand, if the width of the groove 130 is too large, it cannot properly fit with the fingertips of the thumb or four fingers. In this case, the first edge 116 and the second edge 117 may feel uncomfortable to the touch, which is not conducive to the user's grip.

[0261] In some embodiments, limiting protrusions 193 are provided on opposite sides of the head 112, and the two limiting protrusions 193 are respectively located on both sides of the placement groove 130 in the circumferential direction of the outer shell 100; the side of the limiting protrusions 193 facing the tail 113 forms a gripping area 140. Restricting protrusions 195 are provided on opposite sides of the tail 113, and the two restricting protrusions 195 are respectively located on both sides of the placement groove 130 in the circumferential direction of the outer shell 100; the side of the restricting protrusions 195 facing the head 112 forms a gripping area 140. Specifically, in this embodiment, the shape of the limiting protrusions 193 can be varied, such as partially circular, partially circular, partially elliptical, partially elliptical, triangular, or triangular. Similarly, the shape of the restricting protrusions 195 can be varied, such as partially circular, partially circular, partially elliptical, partially elliptical, triangular, or triangular. Among these, "triangular" refers to an overall triangular shape, which may have local concave or convex features. In this embodiment, the protruding size of the limiting protrusion 193 is larger than the protruding size of the restricting protrusion 195. In some embodiments, when limiting protrusions 193 are provided on opposite sides of the head 112 and restricting protrusions 195 are provided on opposite sides of the tail 113, the size of the limiting protrusion 193 is larger than the size of the restricting protrusion 195. By providing the limiting protrusions 193, the size of the grip area 140 near the head 112 is made larger, preventing the ultrasonic beauty device from slipping out of the user's hand when holding it. Similarly, by providing the restricting protrusions 195 at the tail 113, the size of the grip area 140 near the tail 113 is made larger, preventing the ultrasonic beauty device from slipping out of the user's hand when holding it.

[0262] In some embodiments, to improve the safety of the ultrasonic beauty device, the placement groove 130 extends from the head 112 to the tail 113 along the length of the outer casing 100, and passes through the tail 113, so that the placement groove 130 communicates with the outside of the tail 113. In this embodiment, by setting the placement groove 130 to pass through the tail 113, the liquid in the placement groove 130 can flow out from the tail 113. Thus, during use, if liquid accidentally drips into the placement groove 130, it can be quickly drained through the placement groove 130 at the tail 113, avoiding the liquid from being contained in the placement groove 130 for a long time.

[0263] In some embodiments, to improve the safety of the ultrasonic beauty device, the device has a placement surface 191 for contacting a support. When the placement surface 191 contacts the support, the opening of the placement groove 130 faces upward. A first guide surface 131 is formed at the tail 113 of the placement groove 130, and the distance between the first guide surface 131 and the placement surface 191 gradually decreases. A second guide surface 132 is formed at the head 112 of the placement groove 130, and the distance between the second guide surface 132 and the placement surface 191 gradually decreases. The distance between the bottom of the placement groove 130 and the placement surface 191 gradually decreases in the direction from the head 112 to the tail 113.

[0264] Specifically, in this embodiment, the placement surface 191 can take various forms, such as a plane or a surface defined by multiple points. When the opening of the placement groove 130 faces upward, both the first guide surface 131 and the second guide surface 132 extend downward. When liquid accidentally drips into the placement groove 130, it will flow along the first guide surface 131 and / or the second guide surface 132 under the influence of gravity. In particular, the first guide surface 131 extends through the tail 113 of the placement groove 130, allowing liquid to flow out of the placement groove 130 from the first guide surface 131. In some embodiments, the distance between the bottom of the placement groove 130 and the placement surface 191 gradually decreases in the direction from the head 112 to the tail 113, causing the entire placement groove 130 to extend downward in the direction from the head 112 to the tail 113. In this case, if there is liquid in the placement groove 130, it will flow from the head 112 of the outer casing 100 to the tail 113 and then out of the placement groove 130.

[0265] Please see Figures 30 to 34 ,as well as Figures 46 to 48 This application further provides a handheld component 10 for a skin treatment device. The handheld component 10 includes: a housing 100, which includes a main housing 110 and a back housing 120. The main housing 110 has a front side 160 and a back side 150 disposed opposite to each other. The main housing 110 has a mounting cavity 151, the opening 152 of which faces the back side 150. The back housing 120 is connected to the main housing 110 to cover the opening 152. One end of the main housing 110 has a mounting groove 170 for mounting a blade head 20. The mounting groove 170 has a mounting opening 171 for exposing the sound output area 21 of the blade head 20. The mounting opening 171 faces the front side 160.

[0266] Specifically, in this embodiment, the outer shell 100 has a head 112 and a tail 113 disposed opposite to each other, with the head 112 and tail 113 located at opposite ends along the length of the outer shell 100. A mounting groove 170 is located at one end of the main shell 110 corresponding to the head 112, and an assembly cavity 151 extends along the length of the main shell 110. A support structure is provided at the bottom of the assembly cavity 151, on which the drive assembly 210 and the main control board 153 are mounted. The width of the assembly cavity 151 gradually decreases from the back side 150 to the front side 160. The main control board 153 is located in the assembly cavity 151 near the cavity opening 152, and the drive assembly 210 and the drive shaft 250 are located in the assembly cavity 151 near the front side 160. Since the width of the main control board 153 is greater than the clearance of the drive shaft 250, this arrangement facilitates a reasonable layout of the components within the assembly cavity 151, allowing for efficient use of space. Meanwhile, the larger width of the cavity 152 facilitates the entry of components into the assembly cavity 151, and also provides ample operating space for component installation, which is beneficial for the installation of components within the assembly cavity 151. The back shell 120 can be connected to the main shell 110 in various ways, such as by snap-fit ​​connection, screw or other fasteners 852, adhesive connection, or snap-fit ​​connection; no specific limitations are made here. The mounting slot 171 faces forward 160, and the sound output area 21 of the blade 20 also faces forward 160, ensuring that when the user uses the skin treatment device, the front 160 of the main shell 110 faces the human body, and the back 150 faces away from the human body.

[0267] In this embodiment, by setting the width of the back side 150 of the main shell 110 to be greater than the width of the front side 160, the width of the opening 152 of the assembly cavity 151 is greater than the width of the assembly cavity 151 near the front side 160. This makes it easier for the operator to install the parts into the assembly cavity 151 from the wider opening 152. At the same time, with a fixed size of the sound output area 21, it is easier to position the sound output area 21 when it faces the narrower front side 160 than when it faces the wider back side 150, which makes it easier for the user to align the sound output area 21 with the human skin. In addition, when the user is using the skin treatment device, it is easier to hold the handpiece 10 when the narrower side faces them. Thus, the handpiece 10 is easy to assemble and easy for the user to hold and use.

[0268] In some embodiments, the handheld component 10 further includes a drive assembly 210 and a drive shaft 250. The drive assembly 210 is installed in the assembly cavity 151. A partition is provided between the assembly cavity 151 and the mounting groove 170. A clearance hole 111 is provided on the partition. One end of the drive shaft 250 is connected to the drive assembly 210, and the other end is used to extend through the clearance hole 111 into the mounting groove 170 to connect with the cutter head 20.

[0269] Specifically, in this embodiment, the partition can take many forms; in this embodiment, the partition is a shared sidewall of the mounting groove 170 and the assembly cavity 151. The partition prevents water, dust, and insects from the external environment from easily entering the assembly cavity 151 through the mounting groove 170, thus avoiding the influence of external environmental factors on the assembly cavity 151 and improving the stability of the components within the assembly cavity 151. The clearance hole 111 allows the drive shaft 250 to transmit the drive force of the drive assembly 210 to the cutter head 20, enabling the drive assembly 210 to drive the cutter head 20. Therefore, the technical solution in this embodiment, while enabling the drive assembly 210 to act across space on the cutter head 20, also ensures the stability of the components within the assembly cavity 151.

[0270] In some embodiments, to improve the convenience of electrical connection between the cutter head 20 and the handheld component 10, a wire-passing hole is provided on the partition, and a main control board 153 is provided in the assembly cavity 151; an electrical connection plate is provided on the first plate surface of the partition facing the mounting groove 170, and an electrical connector 853 is connected to the electrical connection plate and the main control board 153 through the wire-passing hole; an electrical connection terminal is provided on the plate surface of the electrical connection plate facing the mounting groove 170, and the electrical connection terminal is used for electrical connection of the cutter head 20. In this embodiment, the electrical connector 853 can take many forms, such as wires, flexible circuit boards, etc. The electrical connector 853 is electrically connected to the side of the electrical connection plate facing the first plate surface. There are many ways to connect the electrical connection plate and the partition, such as by snap-fit ​​connection, fastener 852 such as screws, adhesive connection, etc. There are many forms of electrical connection terminals, such as electrical connection ports, pin interfaces, etc. In this embodiment, the connection position of the main control board 153 is led into the mounting slot 170 through the electrical connection plate and electrical connector 853, and the electrical connection terminal is provided to facilitate the connection, so that the cutter head 20 can be conveniently connected to the main control board 153 in the mounting slot 170.

[0271] In some embodiments, to improve the compactness of the structure, an extended boss is provided on the first plate surface at the position corresponding to the clearance hole 111; the electrical connection plate has an adaptation notch whose shape matches the extended boss, and the adaptation notch is provided corresponding to the extended boss. The clearance hole 111 passes through the extended boss, which increases the depth of the clearance hole 111, increases the difficulty for dust, insects, etc. in the mounting groove 170 to enter the assembly cavity 151, and also increases the strength of the partition at the clearance hole 111 position. The extended boss is U-shaped, and the adaptation notch is also U-shaped, and the thickness of the electrical connection plate is less than the height of the extended boss. When the adaptation notch is fitted onto the extended boss, the extended boss protrudes from the plate surface of the electrical connection plate facing away from the first plate surface. When the cutter head 20 is inserted into the mounting groove 170, the extended boss is inserted into the mounting box 668 (the mounting box 668 is used to install the electrical control board of the cutter head 20, and the electrical control board is used to electrically connect with the electrical connection port). Thus, the extended boss also helps to improve the convenience and reliability of the fit between the cutter head 20 and the handheld part 10.

[0272] In some embodiments, the drive shaft 250 extends from the assembly cavity 151 near the front side 160 to the middle of the mounting groove 170. Specifically, in this embodiment, in order to make full and reasonable use of the space of the assembly cavity 151, the drive shaft 250 is located in the assembly cavity 151 near the front side 160. This location has a smaller width and is more suitable for installing a drive shaft 250 with a relatively small radial dimension. At this time, the drive shaft 250 is not in the middle of the assembly cavity 151. In order for the drive shaft 250 to mate with the middle of the cutter head 20 (which is beneficial to improving the reliability of the mating between the drive shaft 250 and the cutter head 20, and also beneficial to the drive shaft 250 to better drive the movement of the transducer assembly 700), the middle of the mounting groove 170 needs to be set to correspond to the drive shaft 250. That is, the position of the assembly cavity 151 near the front side 160 needs to correspond to the middle position of the mounting groove 170 (at this time, the middle of the assembly cavity 151 and the middle of the mounting groove 170 are misaligned), so that the drive shaft 250 can extend from the position of the assembly cavity 151 near the front side 160 to the middle of the mounting groove 170. At the same time, by setting the opening direction of the cavity opening 152 of the assembly cavity 151 opposite to the opening direction of the mounting groove opening 171, it is beneficial to achieve the correspondence between the front side 160 of the assembly cavity 151 and the middle of the mounting groove 170. In this way, by extending the drive shaft 250 from the position near the front side 160 of the assembly cavity 151 to the middle of the mounting groove 170, the drive shaft 250 and the cutter head 20 can be matched in the middle, while also taking into account the reasonable layout of the parts in the assembly cavity 151 and the reasonable use of space.

[0273] In some embodiments, to improve the ease of installation and removal of the cutting head 20 while also maximizing space utilization, the mounting groove 170 has a plug-in port 172. The plug-in port 172 communicates with the mounting groove opening 171, and is positioned away from the assembly cavity 151 along the length of the drive shaft 250. The plug-in port 172 allows the cutting head 20 to enter or exit the mounting groove 170. Specifically, in this embodiment, by setting the orientation of the plug-in port 172 away from the assembly cavity 151 along the length of the drive shaft 250, the cutting head 20 can directly engage with the drive shaft 250 when inserted into the mounting groove 170 from the plug-in port 172, thus improving the ease of installation of the cutting head 20. Simultaneously, by communicating the plug-in port 172 with the mounting groove opening 171, a portion of the cutting head 20 can be exposed through the mounting groove opening 171 during and after assembly, thereby fully utilizing the space on one side of the mounting groove opening 171.

[0274] In some embodiments, to improve the reliability of the user holding the handheld component 10, the outer shell 100 has a head 112 and a tail 113 facing each other. Limiting protrusions 193 are respectively provided on opposite sides of the head 112, and the two limiting protrusions 193 are located on opposite sides of the outer shell 100 in the circumferential direction. The main shell 110 has two oppositely arranged first limiting units 193a, and the back shell 120 has two oppositely arranged second limiting units 193b. The first limiting units 193a and the two limiting units combine to form the limiting protrusions 193. In some embodiments, limiting protrusions 195 are respectively provided on opposite sides of the tail 113, and the two limiting protrusions 195 are located on opposite sides of the outer shell 100 in the circumferential direction. The main shell 110 has two oppositely arranged first limiting units 195a, and the back shell 120 has two oppositely arranged second limiting units 195b. The first limiting units 195a and the two limiting units combine to form the limiting protrusions 195. In some embodiments, the head 112 is provided with limiting protrusions 193 on opposite sides, and the two limiting protrusions 193 are respectively located on opposite sides of the outer casing 100 in the circumferential direction; the tail 113 is provided with limiting protrusions 195 on opposite sides, and the two limiting protrusions 195 are respectively located on opposite sides of the outer casing 100 in the circumferential direction; the two limiting protrusions 193, the two limiting protrusions 195, and the outer casing 100 between the limiting protrusions 193 and the limiting protrusions 195 are combined to form a gripping area 140 for the user to hold.

[0275] Specifically, in this embodiment, the specific positions and shapes of the limiting protrusions 193 and 195 can be consistent with those in the previous embodiments, and will not be repeated here. It should be added that the specific combination form of the limiting protrusions 193 and 195 after the outer shell 100 is divided into the main shell 110 and the back shell 120, and the definition of the gripping area 140, are also specified. After the outer shell 100 is divided into the main shell 110 and the back shell 120, a ridge structure will be formed at the connection between the main shell 110 and the back shell 120. This ridge structure corresponds to the ridge structure at the intersection of the first gripping surface 121 and the second gripping surface 115 mentioned in the above embodiment. Two first limiting units 193a extend and protrude from the middle of the back shell 120 towards both sides in the width direction; two second limiting units 193b extend and protrude from the middle of the main shell 110 towards both sides in the width direction. Both the first limiting unit 193a and the second limiting unit 193b are curved surface structures, extending from each other to form a limiting protrusion 193 when connected. Similarly, two first limiting units 195a extend from the center of the back shell 120 to both sides in the width direction; two second limiting units 195b extend from the center of the back shell 110 to both sides in the width direction. Both the first limiting unit 195a and the second limiting unit 195b are curved surface structures, extending from each other to form a limiting protrusion 195 when connected. The limiting protrusion 193 can limit the gripping position at the head 112, preventing the handheld component 10 from detaching from one end of the head 112; the limiting protrusion 195 can limit the gripping position at the tail 113, preventing the handheld component 10 from detaching from one end of the tail 113. Thus, when the user holds the skin treatment device between the limiting protrusion 193 and the restricting protrusion 195, it helps to improve the reliability of the user's grip on the handpiece 10.

[0276] Please see Figures 35 to 40 Regarding the locking structure 500 mentioned in the above embodiment, there are many ways to implement it. The structure will be described in the following complete embodiment. A handheld component 10 is used in a skin treatment device, the skin treatment device including a blade head 20. The handheld component 10 includes: a housing 100, the housing 100 having an unlocking groove 155, the unlocking groove 155 having a loading / unloading slot 156 communicating with the outside of the housing 600; a locking structure 500 for detachably connecting the blade head 20 to the housing 100, the locking structure 500 being detachably installed in the unlocking groove 155 through the loading / unloading slot 156; the locking structure 500 including an unlocking button 510 for releasing the locking of the blade head 20; and a limiting cover 530, the limiting cover 530 being installed on the housing 100 corresponding to the unlocking groove 155; the limiting cover 530 having an unlocking hole 531, the unlocking button 510 being exposed through the unlocking hole 531.

[0277] Specifically, in this embodiment, the loading / unloading slot 156 connects to the unlocking slot 155 and the exterior of the housing 600. The locking structure 500 can take many forms; for example, the blade 20 can be locked to the head 112 by a snap-fit, a magnetic component, or a locking structure, etc. The limiting cover 530 can take many forms, based on its ability to cover the loading / unloading slot 156, and can be configured in different forms according to different working conditions. The limiting cover 530 can be connected to the housing 100 in many ways, such as by snap-fit ​​connection, screw or other fastener 852 connection, magnetic adsorption connection, plug-in connection, adhesive connection, welding, etc., without any special limitations. The unlocking button 510 is exposed through the unlocking hole 531, allowing the user to conveniently operate the locking structure 500 and thus easily unlock the blade 20.

[0278] In this embodiment, the unlocking slot 155 has a loading / unloading slot 156 communicating with the outside of the housing 600. The unlocking structure can be installed and disassembled through the loading / unloading slot 156, and the loading / unloading slot 156 is covered by a limiting cover plate 530, so that the installation and disassembly of the unlocking structure does not need to pass through the assembly cavity 151 of the housing 100, but only needs to be operated through the unlocking slot 155 and the loading / unloading slot 156. In this way, the installation and disassembly of the unlocking button 510 can be independent of the installation of other components inside the housing 100, without having to operate the unlocking structure in the deep assembly cavity 151, which greatly improves the convenience of the installation and disassembly of the unlocking structure and is beneficial to the replacement and maintenance of the unlocking structure. One end of the housing 100 has a mounting slot 170 for mounting the blade head 20. The unlocking structure includes a locking member 520, one end of which is connected to the unlocking button 510, and the other end extends into the mounting slot 170 for locking connection with the blade head 20. In this embodiment, the mounting groove 170 and the locking member 520 are designed so that the locking position is concealed within the mounting groove 170, significantly reducing the probability of the locking member 520 being damaged by collisions with objects in the external environment. The locking member 520 can take many forms. For example, it may include a locking part 523, a rotating part 522, and an unlocking part 521, with the rotating part 522 located between the locking part 523 and the unlocking part 521. The unlocking part 521 is connected to the unlocking button 510, the locking part 523 extends into the mounting groove 170, and the rotating part 522 is rotatably connected to the wall of the unlocking groove 155. Alternatively, the rotating part 522 may be rotatably mounted on the side of the limiting cover 530 facing the unlocking groove 155. One of the rotating part 522 and the limiting cover 530 may have a rotating pin, and the other may have a rotating pin hole, with the rotating pin inserted into the rotating pin hole. In this embodiment, the locking member 520 has an overall elongated shape, and the rotating part 522 is located in the middle of the locking member 520. When the rotating part 522 is rotatably connected to the wall of the unlocking groove 155, or rotatably connected to the limiting cover plate 530, the locking part 523 and the unlocking part 521 are equivalent to being located at both ends of a lever. When an external force is applied to the unlocking part 521, the locking member 520 rotates about the rotating shaft 763 of the rotating part 522, and the locking part 523 moves to unlock. There are many ways in which the rotating part 522 is rotatably connected to the wall of the unlocking groove 155. For example, a rotating pin is provided on one of the groove wall and the rotating part 522, and a rotating pin hole is provided on the other, with the rotating pin and the rotating pin hole rotatably engaging. Regarding the cooperation between the rotating part 522 and the limiting cover plate 530, a lug can be provided on the limiting cover plate 530, with a rotating pin hole on the lug. A rotating pin is provided on the rotating part 522, and the rotating pin is inserted into the rotating pin hole to rotatably connect the locking part 520 and the limiting cover plate 530. In this way, the locking part 520 and the limiting cover plate 530 are also assembled into a module, which can be installed on the outside of the housing 600 and then installed together into the unlocking slot 155, which helps to improve the assembly efficiency of the unlocking structure.In some embodiments, to ensure sufficient range of motion for the unlocking part 521, an unlocking notch 157 is provided on the shared wall of the unlocking groove 155 and the mounting groove 170. When the unlocking button 510 is pressed, the unlocking notch 157 allows the locking part 523 to swing. In this embodiment, when the unlocking button 510 is pressed, the unlocking button 510 drives the unlocking part 521 to move downwards, and under the rotation of the rotating part 522, it drives the unlocking part 521 to move upwards in the unlocking notch 157. The unlocking notch 157 provides sufficient space for the unlocking part 521 to move, ensuring that the unlocking part 521 can completely disengage from the locking of the blade head 20. In some embodiments, to improve the convenience of user operation, the housing 100 has a front side 160, the unlocking button 510 is exposed on the front side 160, and the mounting groove 170 has a mounting opening 171 for exposing the sound output area 21 of the blade head 20, with the mounting opening 171 facing the front side 160. A placement groove 130 is provided on the front side 160, extending along the length of the outer shell 100. The placement groove 130 is used to place fingers when the user holds the handheld component 10. To improve the ease of installation of the limiting cover 530, the limiting cover 530 includes a plate body and a plug post 550. The plug post 550 is disposed on the plate surface of the plate body facing the unlocking groove 155. A plug hole 158 is provided on the outer shell 100 near the unlocking groove 155, and the plug post 550 is inserted into the plug hole 158. In this embodiment, the plug post 550 extends along the thickness direction of the plate body, and the plug hole 158 extends along the thickness direction of the shell 600. The plug post 550 can be inserted into the plug hole 158 in a generally vertical direction to achieve the insertion and engagement of the limiting cover 530 and the outer shell 100. In some embodiments, the insertion and engagement of the limiting cover 530 and the outer shell 100 is a tight fit.

[0279] In some embodiments, to improve the stability of the installation of the limiting cover 530, the limiting cover 530 includes a covering portion 532 and a mating portion 533. The covering portion 532 is used to cover the unlocking groove 155, and the mating portion 533 has one end bent and overlapped with the groove edge of the mounting groove 170 away from the covering portion 532. Specifically, in this embodiment, one end of the mating portion 533 is connected to the covering portion 532, and the other end is bent and extends to the mounting groove 170, overlapping with the groove edge of the mounting groove 170. The overlapping position can serve as a force point, and the overlapping portion can improve the load-bearing capacity of the limiting cover 530 in the overlapping direction. In some embodiments, the portion of the mating portion 533 that overlaps with the groove edge can be connected to the groove edge, such as through a snap-fit ​​connection, screws, or other fasteners 852. This can further improve the stability of the installation of the limiting cover 530.

[0280] In some embodiments, to ensure smooth and continuous operation of the unlock button 510, an elastic element 540 is provided on the locking member 520 at a position opposite to the unlock button 510. When the unlock button 510 is pressed and compresses the locking member 520, the elastic element 540 undergoes elastic deformation; when the unlock button 510 is released, the elastic element 540 returns to its initial position against the locking member 520 under the action of its elastic restoring force. The elastic element 540 can take many forms, such as a sheet, a spring, or other structures capable of large elastic deformation; in this embodiment, a spring is used as an example. The installation position of the elastic element 540 can be varied, such as being fixedly disposed on the side of the locking member 520 opposite to the unlock button 510, or being fixedly disposed in the unlocking groove 155 at a position corresponding to the locking member 520. Of course, in some embodiments, both ends of the elastic element 540 can also be fixed.

[0281] Please see Figures 33 to 36 The following describes the specific details of the installation of the decorative part 183 on the housing 100, and will be explained in conjunction with a complete embodiment.

[0282] This application further provides an ultrasonic beauty device, which includes: a housing 100, the outer side wall of the housing 100 having a receiving groove 185, the bottom of the receiving groove 185 forming a sol-gel tank 186; a decorative member 183, the decorative member 183 being installed in the receiving groove 185 and exposed through the opening of the receiving groove 185, at least a portion of the decorative member 183 extending into the sol-gel tank 186; an adhesive layer is provided between the outer side wall of the decorative member 183 and the wall of the receiving groove 185, and an adhesive layer is provided between the outer side wall of the decorative member 183 and the wall of the sol-gel tank 186; a blade head 20, the blade head 20 being disposed at one end of the housing 100; the blade head 20 having a mounting cavity 610, a sound output area 21, and an ultrasonic transducer 750 disposed within the blade head 20, the ultrasonic transducer 750 being used to generate ultrasonic energy that passes through the sound output area 21 and is injected into the skin to be treated.

[0283] Specifically, in this embodiment, the specific structure of the blade head 20 can be referred to the above embodiment, and will not be repeated here. It is worth noting that the blade head 20 in this embodiment is a beauty ultrasound head that uses ultrasound waves emitted by the ultrasonic transducer 750 for physiotherapy. The decorative part 183 can take many forms, such as decorative strips, decorative pieces, decorative blocks, decorative balls, decorative gemstones, etc. In this embodiment, the decorative part 183 is a diamond-shaped decorative gemstone as an example. The shape of the receiving groove 185 can be many, such as a long groove, a circular groove, a directional groove, etc. Taking the shape similar to the part used for assembly of the decorative part 183 as an example, in this embodiment, the receiving groove 185 can be generally conical, inverted pyramid, etc. The sol tank 186 is formed at the bottom of the receiving groove 185 and is connected to the receiving groove 185. The overall shape of the sol tank 186 can be columnar, cuboid, cube, etc., to accommodate more sol.

[0284] In this embodiment, by placing the sol-gel tank 186 at the bottom of the receiving tank 185, excess adhesive after the receiving tank 185 and the decorative part 183 are joined can be deposited in the sol-gel tank 186, avoiding the phenomenon of excess adhesive overflow and surface contamination, and simplifying the product cleaning process. At the same time, the sol-gel tank 186 can hold more adhesive, resulting in a thicker adhesive layer in the sol-gel tank 186, thereby increasing the connection strength of the decorative part 183 in the sol-gel tank 186 and improving the installation stability of the decorative part 183. Furthermore, the connection between the adhesive layer in the receiving tank 185 and the adhesive layer in the sol-gel tank 186 increases the overall strength of the adhesive structure, further improving the installation stability of the decorative part 183.

[0285] In some embodiments, to further improve the installation stability of the decorative component 183, the decorative component 183 includes a decorative part and an assembly part 791 connected to the decorative part. The decorative part is exposed in the receiving groove 185, and the assembly part 791 is installed in the receiving groove 185. At least a portion of the outer wall of the assembly part 791 and the groove wall of the receiving groove 185 have a sol-gel gap 189, and an adhesive layer is provided in the sol-gel gap 189. Specifically, in this embodiment, the sol-gel gap 189 can be formed in many ways, such as by providing a recess on the outer wall of the assembly part 791 and / or the inner wall of the receiving groove 185. Alternatively, the inner walls of the assembly part 791 and the receiving groove 185 can be made into curved surfaces or irregular surfaces. By providing the sol-gel gap 189, the thickness of the adhesive layer at the connection is significantly increased, which is beneficial to improving the stability of the connection. In some embodiments, the sol-gel gap 189 can also be implemented by the following method: the outer wall of the mounting part has a first inclined surface 18b, and the wall of the receiving groove 185 has a second inclined surface 18a. The inclination of the first inclined surface 18b is greater than the inclination of the second inclined surface 18a, so as to form a sol-gel gap 189 between the first inclined surface 18b and the second inclined surface 18a. In this way, the width of the sol-gel gap 189 is gradually set. In particular, when the width of the sol-gel gap 189 gradually increases from the opening of the receiving groove 185 to the bottom of the groove (the thickness of the adhesive layer in the sol-gel gap 189 gradually increases), the overall strength of the formed adhesive layer gradually increases uniformly, and the connection strength between the mounting part 791 and the receiving groove 185 also gradually increases uniformly.

[0286] In some embodiments, to improve the assembly efficiency of the ultrasonic beauty device, the outer casing 100 includes a casing body 190 and a decorative cover 180. The decorative cover 180 is fixedly disposed on the outer side wall of the casing body 190, and a receiving groove 185 and a sol-gel groove 186 are formed on the decorative cover 180. Specifically, in this embodiment, the decorative cover 180 and the casing body 190 can be fixedly connected in many ways, such as by snap-fit ​​connection, fastener connection 852 such as screws, adhesive connection, etc. Before installing the decorative cover 180 onto the casing body 190, the decorative part 183 can be installed onto the decorative cover 180 first, so that they are combined to form a module, which is generally installed together onto the casing body 190. In this way, the production and assembly of the casing body 190 and the production and assembly of the decorative cover 180 can be carried out simultaneously, which is beneficial to improving the overall production efficiency. At the same time, this arrangement can also make the visual effect of the outer casing 100 better and the sense of layering stronger.

[0287] In some embodiments, to reduce the thickness of the decorative cover 180, the decorative cover 180 includes a cover plate 188 and a mounting boss 187. The mounting boss 187 is located on the surface of the cover plate 188 facing the main shell 110, and protrudes towards the shell body 190. A receiving groove 185 and a solvent groove 186 are positioned corresponding to the mounting boss 187. In this embodiment, by setting the mounting boss 187 and positioning the receiving groove 185 and the solvent groove 186 corresponding to the mounting boss 187, the thickness of the decorative cover 180 at the location of the mounting boss 187 can be relatively large. The thickness of other parts of the cover plate 188 is not subject to special requirements and can be kept relatively thin. This reduces the material used and weight of the decorative cover 180. In some embodiments, to improve the assembly compactness of the decorative cover 180, a mounting recess 197 is formed on the shell body 190 corresponding to the mounting boss 187. The mounting boss 187 is inserted into the mounting recess 197, and the cover plate 188 and the main shell 110 are mated (including full mating and partial mating). In this embodiment, by providing the mounting recess 197 on the shell body 190, the mounting boss 187 can be inserted therein for mating, thus improving the mating compactness of the two. At the same time, by mating at least a portion of the surface of the cover plate 188 facing the shell body 190 and the surface of the shell body 190 facing the cover plate 188, the mating between the cover plate 188 and the shell body 190 is more stable and compact.

[0288] In some embodiments, to improve the stability of the decorative cover 180 during installation, a mounting groove 196 is formed on the housing body 190 corresponding to the decorative cover 180, and the decorative cover 180 is installed in the mounting groove 196. By installing the decorative cover 180 in the mounting groove 196, the side of the decorative cover 180 can cooperate with the groove wall of the mounting groove 196, so that the groove wall of the mounting groove 196 can restrict the movement of the decorative cover 180, which helps to improve the installation stability of the decorative cover 180. In some embodiments, to facilitate the removal of the decorative cover 180, the overall shape of the mounting groove 196 is U-shaped, and one end of the decorative cover 180 extends out of the mounting groove 196 through the U-shaped opening. By extending one end of the decorative cover 180 out of the mounting groove 196 through the U-shaped opening, the user can use the part of the decorative cover 180 protruding from the mounting groove 196 as a force point when removing the decorative cover 180. For example, by using your hand or other tools to act on the protruding part, you can quickly separate the decorative cover 180 from the shell body 190.

[0289] The decorative cover 180 can take many forms, such as an integrally formed decorative cover 180 or a separate decorative cover 180 assembled later. In this embodiment, the decorative cover 180 includes an inner cover 182 and an outer cover 181, with the outer cover 181 fitting around the periphery of the inner cover 182. By setting the decorative cover 180 to include an inner cover 182 and an outer cover 181, the inner cover 182 and the outer cover 181 can be made of different materials (reflecting different textures), have different colors, etc., which helps to enrich the elements of the decorative cover 180, adapt to more types of designs, and provide more flexibility in realizing the design of the decorative cover 180. The outer cover 181 is U-shaped, and the end face of the inner cover 182 is exposed through the U-shaped opening; and / or, the surface of the outer cover 181 and the surface of the inner cover 182 are located in the same plane. The surfaces of the outer cover 181 and the inner cover 182 can be located in the same plane or in the same arc surface. This arrangement can improve the fit between the outer cover 181 and the inner cover 182, enhance the overall look of the decorative cover 180, and also make it easier for users to hold the cover and avoid too many uncomfortable spots.

[0290] Please see Figures 41 to 45 Regarding the layout of the drive structure 200 within the housing 100 of the handheld component 10, its form and component division can take many forms. A specific example is given below to illustrate the working principle of the drive structure 200. Specifically, the drive structure 200 includes a drive assembly 210 and a transmission rod 231. The drive assembly 210 includes a drive motor 220 and a transmission assembly 230. The drive motor 220 is driven by the transmission assembly 230, and the transmission assembly 230 is connected to the transmission shaft 250. The transmission assembly 230 includes a transmission rod 231 and a transmission block 232. The transmission block 232 is threadedly engaged with the transmission rod 231. One end of the transmission rod 231 is connected to the drive motor 220. When the transmission rod 231 rotates under the action of the drive motor 220, the transmission block 232 moves along the length of the transmission rod 231 (the transmission rod 231 rotates relative to the transmission block 232). One end of the drive shaft 250 is connected to the drive block 232, and the other end is used to connect to the transducer assembly 700 inside the cutter head 20. The drive shaft 250 moves with the movement of the drive block 232.

[0291] The technical solutions related to the drive structure 200 are described below with reference to complete embodiments.

[0292] This application discloses a handheld component 10 for a skin treatment device, the skin treatment device including a blade head 20, and a transducer assembly 700 disposed inside the blade head 20. The handheld component 10 includes: a housing 100, one end of which is used to mount the blade head 20; a drive structure 200, the drive structure 200 including a drive assembly 210 and a drive shaft 250 arranged along the length direction of the housing 100, the drive shaft 250 being used to drive the transducer assembly 700 to move; and a drive bracket 300, the drive bracket 300 including a mounting frame 310, a support column 330, and a buffer pad 320, the mounting frame 310 being used to mount the drive assembly 210, one end of the support column 330 being fixedly connected to the mounting frame 310, and the other end being fixedly connected to the inner sidewall of the housing 100, the buffer pad 320 being disposed at the connection between the support column 330 and the drive bracket 300; the drive assembly 210 and the mounting frame 310 are suspended on the support column 330.

[0293] Specifically, in this embodiment, the support column 330 can take many forms, such as a cylindrical column or a square column. In this embodiment, one end of the support column 330 is connected to the inner wall of the outer shell 100, and the other end extends into the assembly cavity 151. The direction of extension into the assembly cavity 151 can be varied; for example, it can extend from the bottom of the assembly cavity 151 towards the cavity opening 152. Thus, when the drive bracket 300 is installed on the support column 330, it can be conveniently installed from the cavity opening 152, allowing for operation perpendicular to the cavity opening 152, providing the operator with a better field of vision and greater operating space. The number of support columns 330 can be set according to actual working conditions, such as one (larger), two, three, four, or more. Different numbers can have different configurations, and no special limitation is made here, as long as the number and form are suitable for installing the drive bracket 300. The mounting bracket 310 can take many forms, such as a frame structure or a plate structure, and no special limitation is made here, as long as it is suitable for installing the drive assembly 210. The drive assembly 210 can be mounted on the mounting bracket 310 in various ways, such as by fasteners 852 (screws), by snap-fit ​​connections, or by insertion through shaft holes. The buffer pad 320 can be installed in many ways, such as by sleeve connection, snap-fit ​​connection, adhesive connection, or by fasteners 852 (straps), etc., without any specific limitations. The buffer pad 320 is an elastic buffer pad 320, capable of elastic deformation under compressive force and elastic recovery when the compressive force is removed. By placing it at the connection between the support column 330 and the mounting bracket 310, the buffer pad 320 can absorb the interaction force between the support column 330 and the mounting bracket 310 when forces are applied between them, thereby reducing the transmission of force between the support column 330 and the mounting bracket 310.

[0294] In this embodiment, by suspending the drive assembly 210 and the mounting bracket 310 on the support column 330, the vibration generated by the drive assembly 210 and the mounting bracket 310 during operation is transmitted to the housing 100 through the support column 330. By placing the buffer pad 320 at the connection between the mounting bracket 310 and the support column 330, the vibration on the mounting bracket 310 needs to pass through the buffer pad 320 before being transmitted to the support column 330. During the process of vibration passing through the buffer pad 320, the buffer pad 320 absorbs the energy of the vibration through elastic deformation (converting the mechanical energy of the vibration into the potential energy and heat energy of the deformation), which greatly reduces the amount of vibration transmitted from the mounting bracket 310 to the support column 330, which helps to reduce the vibration of the housing 100. At the same time, placing the buffer pad 320 on the bracket and the support column 330 bracket avoids direct contact between the two rigid parts, which can reduce the noise generated by the contact vibration between the rigid parts, which helps to reduce the noise emitted by the handheld part 10 during operation.

[0295] In some embodiments, to further improve the vibration reduction effect of the motor, the buffer pad 320 is elastic. The buffer pad 320 includes a first buffer portion 321, a second buffer portion 322, and a buffer arm 323 connecting the first buffer portion 321 and the second buffer portion 322. The buffer arm 323 has mounting holes 325 extending through both ends. The mounting bracket 310 has an assembly hole 311. The first buffer portion 321 passes through the assembly hole 311 so that the first buffer portion 321 and the second buffer portion 322 clamp the mounting bracket 310. The buffer arm 323 is located in the assembly hole 311. The end of the support column 330 away from the outer casing 100 is inserted into the mounting hole 325 and fixedly connected to the mounting bracket 310.

[0296] Specifically, in this embodiment, the overall shape of the buffer pad 320 is "I". Through the mounting hole 311, the first buffer portion 321 and the second buffer portion 322 of the buffer pad 320 clamp the mounting frame 310, and the buffer arm 323 is located within the mounting hole 311. At this time, the vibration of the mounting frame 310 can be simultaneously transmitted to the first buffer portion 321, the second buffer portion 322, and the buffer arm 323, allowing the buffer pad 320 to absorb vibration energy evenly and widely, avoiding concentrated vibration transmission. Simultaneously, when vibrations from different directions are transmitted to the buffer pad 320, energy collisions will occur within the buffer pad 320, significantly increasing energy consumption. When the end of the support column 330 furthest from the outer casing 100 is inserted into the mounting hole 325, the vibrations around the buffer pad 320 are first transmitted to the first buffer portion 321 and the second buffer portion 322, then to the buffer arm 323 in the middle, and finally transmitted by the buffer arm 323 to the end of the support column 330 inside. Because the inner wall of the mounting hole 325 transmits vibration to the outer wall of the support column 330 simultaneously, the vibration experienced by the support column 330 is balanced around its perimeter, preventing uneven stress and subsequent movement. Simultaneously, the vibration is transmitted radially to the support column 330 and then longitudinally to the outer casing 100. During this process, the energy transmission direction changes, accelerating energy loss.

[0297] There are many possible connection methods between the support column 330 and the drive bracket 300, which are illustrated below with examples. In some embodiments, the drive bracket 300 further includes a clamping structure, with one end of the support column 330 that mates with the buffer pad 320 serving as a fastening end 332. The fastening end 332 extends through the mounting hole 325, and the clamping structure is tightly fitted with the fastening end 332 to clamp the first buffer portion 321. The clamping structure can take many forms; any structure that can mate with the fastening end 332 to clamp the first buffer portion 321 is acceptable. For example, if the clamping structure has a hole-like structure, it can be fitted onto the fastening end 332. There are many ways to connect the clamping structure and the fastening end 332, such as threaded connection, snap-fit ​​connection, screw or other fasteners 852, adhesive connection, welding, etc. In this embodiment, the clamping structure and the fastening end 332 are connected by a thread, for example, the fastening end 332 has external threads, the clamping structure has internal threads, and the clamping structure can be a nut. In some other embodiments, the fastening end 332 has a fastening hole, and the clamping structure cooperates with the fastening end 332 through the fastening hole to clamp the first buffer portion 321. In this embodiment, a part of the clamping structure is connected to the fastening hole (which can be a plug-in connection, threaded connection, adhesive connection, welding, etc.), and the other part clamps the first buffer portion 321. The clamping structure can be bolted.

[0298] In some embodiments, to improve the stability of the buffer pad 320 installation, a support strip 331 is provided on the side wall of the support column 330. The support strip 331 is used to abut against the second buffer portion 322. One end of the support strip 331 abuts against the second buffer portion 322, and the other end extends along the length of the support column 330. In some embodiments, the end of the support strip 331 away from the second buffer portion 322 extends to the bottom of the assembly cavity 151 and connects to the inner side wall of the housing 100. The support strip 331 can be mounted on the support column 330 or integrally formed with the support column 330. For example, the support column 330 is integrally formed with the housing 100. The number of support strips 331 can be one, two, three, four, etc., and can be set according to specific working conditions. In this embodiment, there are multiple support strips 331, which are arranged at intervals along the circumference of the support column 330, and the end faces of the multiple support strips 331 facing the second buffer portion 322 are located in the same plane. By setting the end faces of multiple support bars 331 facing the second buffer part 322 to be coplanar, the force on the side of the second buffer part 322 facing the support bars 331 is more even.

[0299] In some embodiments, to improve the stability of the drive structure installation, there are multiple support columns 330, distributed on both sides of the drive assembly 210 in the width direction. Connecting walls 333 are provided between support columns 330 located on the same side of the drive assembly 210; and / or, the length direction of the support columns 330 is perpendicular to the length direction of the housing 100. Specifically, in this embodiment, four support columns 330 are used as an example. The four support columns 330 are divided into two groups, with each group of support columns 330 spaced apart along the length direction of the housing 100. The two groups of support columns 330 are located on both sides of the width direction of the housing 100. The connecting walls 333 are plate-shaped and connect adjacent support columns 330 into a single unit. This arrangement helps to increase the load-bearing capacity of the support column 330. At the same time, it also increases the inertia of the support column 330 (the vibration transmitted from the buffer pad 320 to the support column 330 will be transmitted to another support column 330 through the connecting wall 333, thus greatly increasing the energy required for the support column 330 to vibrate, or in other words, increasing the resistance that needs to be overcome). That is, in the process of transmitting vibration through the support column 330, the resistance that needs to be overcome is greatly increased, which helps to improve the vibration reduction effect.

[0300] In some embodiments, the mounting bracket 310 includes a mounting plate 312 and suspension arms 313 disposed at both ends of the mounting plate 312, a drive assembly 210 is mounted on the suspension arms 313, and a support column 330 is fixedly connected to the mounting plate 312.

[0301] Specifically, in this embodiment, the buffer pad 320 is disposed at the connection between the support column 330 and the mounting plate 312. Compared with irregular structures, the regular plate-shaped structure is more convenient for the installation of the buffer pad 320. For example, in some embodiments, the first buffer part 321 and the second buffer part 322 can respectively fit against the two plate surfaces of the mounting plate 312, which is beneficial to improving the compactness of the structure and the efficiency of vibration energy transmission.

[0302] In some embodiments, the drive assembly 210 includes a drive motor 220 and a transmission assembly 230. The transmission assembly 230 includes a transmission rod 231 and a transmission block 232. The two ends of the transmission rod 231 are rotatably connected to two suspension arms 313 respectively. The transmission block 232 is threadedly engaged with the transmission rod 231, so that the transmission block 232 can move along the transmission rod 231. One end of the transmission shaft 250 is fixedly connected to the transmission block 232, so as to move along the length direction of the housing 600 as the transmission block 232 moves. The drive motor 220 is mounted on the side wall of the suspension arm 313 opposite to the transmission rod 231. The output shaft of the drive motor 220 is fixedly connected to the end of the transmission rod 231.

[0303] Specifically, in this embodiment, the transmission rod 231 can be a threaded rod with external threads, and the transmission block 232 has a transmission hole with internal threads. The transmission rod 231 passes through the transmission hole and is threadedly engaged with the transmission block 232. One of the two suspension arms 313 is near the head 112 of the housing 100, and the other is near the middle of the housing 100. The drive motor 220 is located in the middle of the housing 100, outside the two suspension arms 313. The suspension arm 313 has a through-hole structure for connecting the output shaft and the transmission rod 231. The transmission rod 231 and / or the transmission shaft 250 passes through the suspension arm 313 and is fixedly connected. In this embodiment, by mounting both the transmission rod 231 and the drive motor 220 on the suspension arm 313, the drive assembly 210 is suspended. This causes the vibration generated by the drive assembly 210 to be transmitted outward through the mounting bracket 310, increasing the vibration transmission stroke, increasing energy loss, and reducing the vibration of the housing 100. In some embodiments, to further improve the movement accuracy of the transmission block 232, a guide post 236 is provided on the transmission block 232, and a guide groove 315 is provided on the mounting plate 312. The guide groove 315 extends along the length direction of the housing 100, and the guide post 236 is inserted into the guide groove 315, so that the transmission block 232 moves along the direction of the guide groove 315. In some embodiments, to improve the movement accuracy of the transmission shaft 250, the drive assembly 210 further includes a guide rod 270, the two ends of which are fixedly connected to two suspension arms 313 respectively; a guide hole 235 is provided on the transmission block 232, and the guide rod 270 passes through the guide hole 235; and / or, the housing 100 has a head 112 for mounting the cutter head 20, and a guide hole 316 is provided on the suspension arm 313 adjacent to the head 112, through which the transmission shaft 250 passes.

[0304] Specifically, in this embodiment, a guide hole 235 is provided on the transmission block 232, allowing the guide rod 270 to pass through the guide hole 235 and be installed on the suspension arm 313. At this time, the transmission block 232 is simultaneously passed through by both the guide rod 270 and the transmission rod 231, preventing the transmission block 232 from rotating. When the transmission rod 231 rotates, the transmission block 232 can only move along the transmission rod 231 and the guide rod 730, thus significantly increasing the power transmission efficiency. Simultaneously, the moving distance of the transmission block 232 is directly related to the number of rotations of the drive motor 220 (transmission rod 231), and the position of the transmission block 232 on the transmission rod 231 can be adjusted by controlling the number of rotations of the motor. This improves the moving accuracy of the transmission block 232 and also improves the moving accuracy of the transmission shaft 250 fixedly connected to the transmission block 232. By setting the guide hole 316, the longer drive shaft 250 can have multiple limiting structures, which can prevent the drive shaft 250 from misaligning and swaying during movement, thereby improving the accuracy of the movement path of the drive shaft 250.

[0305] Please see Figure 47 and 48 There can be many ways to drive the connection between the handheld component 10 and the blade head 20. The following is a detailed description using a complete technical solution as an example. A blade head 20 is used in a skin treatment device. The skin treatment device includes a handheld component 10 with a drive structure 200. The blade head 20 includes: a housing 600, the housing 600 having a mounting cavity 610 and a communicating hole 612, the communicating hole 612 penetrating the side wall of the housing 600; a transducer assembly 700, the transducer assembly 700 being movably disposed within the mounting cavity 610; and a sealing telescopic tube 810, the sealing telescopic tube 810 having a fixing part 819, the fixing part 819 being fixedly connected to the transducer assembly 700; the sealing telescopic tube 810 has... It has an open end 811, which is sealed to the housing 600 through a connecting hole 612; a linkage shaft 680, one end of which extends into the sealed telescopic tube 810 through the connecting hole 612 and the open end 811 and is installed in the fixing part 819, and the other end of the linkage shaft 680 is used to connect to the drive structure 200 through a quick-release structure 880; wherein, the housing 600 is detachably installed on the handheld part 10, and the linkage shaft 680 is used to connect the drive structure 200 and the transducer assembly 700 for driving the transducer assembly 700 to move.

[0306] Specifically, in this embodiment, the general structure of the drive structure 200, housing 600, sealing telescopic tube 810, transducer assembly 700, etc., can be referred to the above embodiment, and will not be repeated here. There are many ways to connect the linkage shaft 680 and the fixing part 819, such as by fasteners 852 (screws), by snap-fit ​​connection, by magnetic adsorption connection, by threaded connection, by welding, by plug-in tight fit, etc., and no special limitation is made here. The linkage shaft 680 and the drive structure 200 are connected by a quick-release structure 880 to facilitate quick assembly and disassembly of the linkage shaft 680 and the drive structure 200. The quick-release structure 880 can be a magnetic adsorption connection structure, a snap-fit ​​connection structure, a shaft hole plug-in tight fit structure, a threaded connection structure, a connector structure, etc. Regarding the connection position of the linkage shaft 680 and the drive structure 200, it can be inside the handheld part 10 or inside the handheld part 10, depending on the form of the quick-release structure 880. For example, when the quick-release structure 880 is connected by magnetic adsorption or a tight fit through a shaft hole (a structure that allows for quick connection and disassembly without relying on vision or operating space), the connection point between the linkage shaft 680 and the drive structure 200 can be located inside the handheld component 10. Conversely, if the quick-release structure 880 relies on vision or requires a certain amount of operating space, the connection point between the linkage shaft 680 and the drive structure 200 is preferably located outside the housing 100 of the handheld component 10.

[0307] In this embodiment, by setting one end of the linkage shaft 680 to extend into the sealed telescopic tube 810 through the connecting hole 612 and the open end 811 and install it on the fixing part 819, and the other end to be exposed outside the housing 600, the exposed end of the linkage shaft 680 can be quickly installed and quickly disassembled with the drive structure 200 through the quick-release structure 880, thereby realizing the quick installation and disassembly of the cutter head 20 and the handheld part 10, which is beneficial to the user's operation.

[0308] In some embodiments, the handheld component 10 includes a housing 100 having an assembly cavity 151. The drive structure 200 includes a drive assembly 210 and a drive shaft 250. The drive assembly 210 is disposed in the assembly cavity 151. One end of the drive shaft 250 is connected to the drive assembly 210, and the other end extends to the outside of the drive cavity and is connected to the linkage shaft 680 via a quick-release structure 880.

[0309] Specifically, in this embodiment, the end of the drive shaft 250 furthest from the drive assembly 210 is exposed outside the housing 100. At this time, the connection point between the drive shaft 250 and the linkage shaft 680 is located outside the housing 100 and the casing 600, allowing the operator to see the connection point and providing sufficient space to operate the quick-release structure 880. This improves the ease of quickly installing and removing the drive shaft 250 and the linkage shaft 680.

[0310] In some embodiments, the quick-release structure 880 includes a first magnetic component 260 and a second magnetic component 820. The first magnetic component 260 is fixedly connected to the drive structure 200, and the second magnetic component 820 is fixedly connected to the exposed end of the linkage shaft 680. The first magnetic component 260 can be fixedly connected to the drive structure 200 in various ways, such as by threaded connection, screw fastening, snap-fit ​​connection, adhesive connection, welding, etc. Similarly, the second magnetic component 820 can be fixedly connected to the linkage shaft 680 in various ways, such as by threaded connection, screw fastening, snap-fit ​​connection, adhesive connection, welding, etc. Of course, in some embodiments, the linkage shaft 680 itself can be a magnetic component. The first magnetic component 260 and the second magnetic component 820 can be electromagnets 930, magnets, or other components with magnetic capabilities or magnetic attraction capabilities, such as metallic iron. Taking the magnetic attraction of the first magnetic component 260 and the second magnetic component 820 as an example, where both the first magnetic component 260 and the second magnetic component 820 are magnets.

[0311] In some embodiments, the quick-release structure 880 includes a first insertion structure and a second insertion structure. The first insertion structure is fixedly connected to the drive structure 200, and the second insertion structure is disposed at the exposed end of the linkage shaft 680. The first and second insertion structures are inserted and mated together. Specifically, in this embodiment, the connection method between the first insertion structure and the drive structure 200, and the connection method between the second insertion structure and the linkage shaft 680, can be varied, such as threaded connection, screw fastening connection, snap-fit ​​connection, adhesive connection, welding, etc. In some embodiments, the second insertion structure and the linkage shaft 680 can also be integrally formed. One of the first and second insertion structures has an insertion groove, and the other has a plug, which is tightly fitted into the insertion groove.

[0312] In some embodiments, the quick-release structure 880 includes a first snap-fit ​​structure and a second snap-fit ​​structure. The first snap-fit ​​structure is disposed at the exposed end of the drive shaft 250, and the second snap-fit ​​structure is disposed at the exposed end of the linkage shaft 680; the first snap-fit ​​structure and the second snap-fit ​​structure engage with each other. Specifically, in this embodiment, the connection method between the first snap-fit ​​structure and the drive shaft 250, and the connection method between the second snap-fit ​​structure and the linkage shaft 680, can be varied, such as threaded connection, screw fastening connection, snap-fit ​​connection, adhesive connection, welding, etc. In some embodiments, the first snap-fit ​​structure and the drive shaft 250 can be integrally formed, and the second snap-fit ​​structure and the linkage shaft 680 can be integrally formed. One of the first snap-fit ​​structure and the second snap-fit ​​structure has a snap-fit ​​position or snap-fit ​​hole, and the other has a snap-fit ​​part. The snap-fit ​​part and the snap-fit ​​position or snap-fit ​​hole engage to realize the engagement of the first snap-fit ​​structure and the second snap-fit ​​structure.

[0313] In some embodiments, the quick-release structure 880 includes a first threaded structure and a second threaded structure. The first threaded structure is disposed at the exposed end of the drive shaft 250, and the second threaded structure is disposed at the exposed end of the linkage shaft 680; the first threaded structure and the second threaded structure are threadedly connected. Specifically, in this embodiment, there are many ways to connect the first threaded structure to the drive shaft 250 and the second threaded structure to the linkage shaft 680, such as threaded connection, screw fastening connection, snap-fit ​​connection, adhesive connection, welding, etc. In some embodiments, the first threaded structure and the drive shaft 250 can be integrally formed, and the second threaded structure and the linkage shaft 680 can be integrally formed. One of the first threaded structure and the second threaded structure has an internal thread, and the other has an external thread; the internal thread and the external thread cooperate to achieve the threaded connection between the first threaded structure and the second threaded structure. The one with the internal thread can be a threaded hole, and the one with the external thread can be a threaded shaft.

[0314] In some embodiments, a quick-release head structure is provided on one of the exposed ends of the drive shaft 250 and the linkage shaft 680, and the other is detachably connected to the quick-release head structure. Specifically, in this embodiment, the quick-release head structure has a fastening hole, into which the exposed end of the drive shaft 250 or the linkage shaft 680 can be inserted, and then the inserted shaft end is fastened by a clamping mechanism or a holding mechanism. Of course, in some embodiments, the exposed ends of the drive shaft 250 and the linkage shaft 680 can be respectively inserted into the two ends of the quick-release head structure, and then connected by a threaded connection or a clamping mechanism.

[0315] The specific structures of the fixing part 819 and the sealing telescopic tube 810 are briefly illustrated below. For detailed structural information, please refer to the embodiments described above; further details will not be repeated here. The fixing part 819 is a self-closing structure. The end of the sealing telescopic tube 810 away from the open end 811 is a self-closing end 812, and the fixing part 819 is located at the self-closing end 812. The fixing part 819 is formed between the two ends of the sealing telescopic tube 810, forming a first telescopic part 81a and a second telescopic part 81b on both sides of the fixing part 819. The first telescopic part 81a has an open end 811; the end of the second telescopic part 81b away from the fixing part 819 is formed as a self-closing end 812 connected to the housing 600, or the end of the second telescopic part 81b away from the fixing part 819 is sealed to the housing 600. A fixing portion 819 is formed between the two ends of the sealing telescopic tube 810, so that a first telescopic portion 81a and a second telescopic portion 81b are formed on both sides of the fixing portion 819. The first telescopic portion 81a has an open end 811. The end of the second telescopic portion 81b away from the fixing portion 819 is formed as a self-closing end 812 connected to the housing 600. The first telescopic section and the second telescopic section are connected at the position of the fixing portion 819. Alternatively, a vent hole 613 is formed on the housing 600, penetrating the side wall of the housing 600. The end of the second telescopic portion 81b away from the fixing portion 819 is sealed and connected to the vent hole 613.

[0316] This utility model also proposes a skin treatment device, which includes a handheld component 10 and a blade head 20. The specific structure of the handheld component 10 and the blade head 20 is as described in the above embodiments. Since this skin treatment device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0317] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. All equivalent structural transformations made under the inventive concept of this utility model using the contents of this utility model specification and drawings, or technical solutions combining elements in different embodiments, or direct / indirect applications in other related technical fields are included within the patent protection scope of this utility model.

Claims

1. A handheld device for a skin treatment apparatus, the skin treatment apparatus comprising a blade head, wherein a transducer assembly is disposed within the blade head, characterized in that, The handheld device includes: A housing, one end of which is used to assemble the cutting head; A drive structure, comprising a drive assembly and a transmission shaft arranged along the length of the housing, the transmission shaft being used to drive the transducer assembly to move; A drive bracket includes a mounting frame, a support column, and a buffer pad. The mounting frame is used to mount the drive assembly. One end of the support column is fixedly connected to the mounting frame, and the other end is fixedly connected to the inner sidewall of the housing. The buffer pad is disposed at the connection between the support column and the mounting frame. The drive assembly and the mounting frame are suspended on the support column.

2. The handheld device as described in claim 1, characterized in that, The buffer pad is elastic and includes a first buffer part, a second buffer part, and a buffer arm connecting the first buffer part and the second buffer part. The buffer arm has mounting holes that pass through both ends of it. The mounting bracket has an assembly hole, the first buffer part passes through the assembly hole so that the first buffer part and the second buffer part clamp the mounting bracket, and the buffer arm is located in the assembly hole; The end of the support column away from the outer casing is inserted into the mounting hole and fixedly connected to the mounting bracket.

3. The handheld device as described in claim 2, characterized in that, The support column has a support bar on its side wall, which is used to abut against the second buffer part.

4. The handheld device as described in claim 3, characterized in that, The number of support bars is multiple, and the multiple support bars are arranged at intervals along the circumference of the support column, and the end faces of the multiple support bars facing the second buffer part are located in the same plane.

5. The handheld device as described in claim 2, characterized in that, The drive bracket also includes a clamping structure, and the end of the support column that cooperates with the buffer pad is a fastening end; The fastening end protrudes from the mounting hole, and the clamping structure is fastened to the fastening end to clamp the first buffer portion; or, The fastening end has a fastening hole, and the clamping structure cooperates with the fastening end through the fastening hole to clamp the first buffer part.

6. The handheld component as described in any one of claims 1 to 5, characterized in that, The number of support columns is multiple, and the multiple support columns are distributed on both sides of the drive assembly in the width direction. A connecting wall is provided between the support columns located on the same side of the drive assembly; and / or, The length direction of the support column is perpendicular to the length direction of the outer shell.

7. The handheld component as described in any one of claims 1 to 5, characterized in that, The mounting frame includes a mounting plate and suspension arms disposed at both ends of the mounting plate. The drive assembly is mounted on the suspension arms, and the support column is fixedly connected to the mounting plate.

8. The handheld device as described in claim 7, characterized in that, The drive assembly includes a drive motor and a transmission assembly. The transmission assembly includes a transmission rod and a transmission block. The two ends of the transmission rod are rotatably connected to the two suspension arms respectively. The transmission block is threadedly engaged with the transmission rod, allowing the transmission block to move along the transmission rod. One end of the transmission shaft is fixedly connected to the transmission block, so as to move along the length of the housing as the transmission block moves. The drive motor is mounted on the side wall of the suspension arm opposite to the transmission rod; the output shaft of the drive motor is fixedly connected to the end of the transmission rod.

9. The handheld device as described in claim 8, characterized in that, The drive assembly further includes a guide rod, the two ends of which are fixedly connected to the two suspension arms respectively; the transmission block is provided with a guide hole, through which the guide rod passes; and / or, The housing has a head for mounting the cutter head, and a guide hole is provided on the suspension arm adjacent to the head, through which the drive shaft passes.

10. A skin treatment device, characterized in that, The skin treatment device includes a blade and a handheld component as described in any one of claims 1 to 9.

Images