Cutter head and skin treatment device

Abstract

The utility model discloses a cutting head and a skin treatment device, the cutting head comprises a shell, the shell is provided with a mounting cavity and a through hole structure, and the through hole structure penetrates through the side wall of the shell; the transducer assembly is movably arranged in the mounting cavity; the telescopic pipe is arranged in the mounting cavity, one end of the telescopic pipe is an open end, the other end of the telescopic pipe is connected with the transducer assembly, and the open end is communicated with the through hole structure; the sealing connection structure comprises a pressing piece and a fastening piece connected with the pressing piece, and at least part of the open end is clamped by the pressing piece and the fastening piece so that the clamped part of the telescopic pipe can be attached to the pressing piece and / or the fastening piece in a sealed mode; the sealing connection structure is matched with the side wall of the shell so that the open end can be connected to the shell in a sealed mode. The sealing connection structure is provided with an air passing hole so that the interior of the telescopic pipe can communicate with the outside through the opening of the open end and / or the through hole structure. According to the technical scheme, the sealing performance can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of beauty treatment, in particular to a cutter head and a skin treatment device. Background Art

[0002] Ultrasound therapy is a common treatment method in the medical aesthetics industry. During treatment, an ultrasound device uses a transducer inside the handle to generate focused ultrasound waves, creating a treatment point beneath the skin, offering an anti-aging and lifting effect. For example, ultrasound devices surpass the depth limitations of traditional non-surgical devices, penetrating deep into the SMAS (Superficial Musculo-Aponeurotic System) fascia layer. Ultrasound energy concentrates at the treatment point, generating high temperatures that contract the target tissue and stimulate collagen regeneration, achieving anti-aging, wrinkle removal, firming, lifting, and contouring effects. The energy waves generated by the transducer can directly act on the fascia layer, causing it to contract.

[0003] In order to reduce the frequency with which users move the ultrasonic nursing device, the transducer is configured to be movable relative to the product's housing. The movement of the transducer is achieved by the cooperation of a drive mechanism and a transmission member. The transducer operates in a liquid environment. To prevent liquid leakage, a hose is provided to seal the connection between the transmission member and the transducer. The prerequisite for the hose to be able to seal and isolate the transmission member from the transducer assembly is that the hose and the housing need to be sealed in a manner that prevents liquid from entering the hose and leaking from the connection between the hose and the housing. Therefore, how the hose is specifically sealed with the side wall of the housing becomes a problem that needs to be solved urgently. Utility Model Content

[0004] The main purpose of the utility model is to provide a cutter head, aiming to improve the sealing performance.

[0005] To achieve the above-mentioned purpose, the blade head proposed in the present invention is used for a skin treatment device, and the blade head includes: a shell, the shell having a mounting cavity and a through-hole structure, and the through-hole structure passes through the side wall of the shell; a transducer assembly, the transducer assembly is movably arranged in the mounting cavity; a telescopic tube, the telescopic tube is arranged in the mounting cavity, one end of the telescopic tube is an open end, and the other end is connected to the transducer assembly, and the open end is connected to the through-hole structure; a sealing connection structure, the sealing connection structure includes a pressing member and a fastener connected to the pressing member, at least a portion of the open end is clamped by the pressing member and the fastener, so that the clamped portion of the telescopic tube is sealed and fits with the pressing member and / or the fastener; the sealing connection structure cooperates with the side wall of the shell to seal the open end to the shell; the sealing connection structure has an air hole, so that the interior of the telescopic tube is connected to the outside through the opening of the open end and / or the through-hole structure.

[0006] The present invention also proposes a skin treatment device, comprising a handpiece and a cutting head, wherein the handpiece is detachably connected to the cutting head; wherein the cutting head comprises: a shell, wherein the shell has a mounting cavity and a through-hole structure, and the through-hole structure passes through the side wall of the shell; a transducer assembly, wherein the transducer assembly is movably arranged in the mounting cavity; a telescopic tube, wherein the telescopic tube is arranged in the mounting cavity, one end of the telescopic tube is an open end, and the other end is connected to the transducer assembly, and the open end is connected to the through-hole structure; a sealing connection structure, wherein the sealing connection structure comprises a pressing member and a fastener connected to the pressing member, wherein at least a portion of the open end is clamped by the pressing member and the fastener, so that the clamped portion of the telescopic tube is sealed and fitted with the pressing member and / or the fastener; the sealing connection structure cooperates with the side wall of the shell to seal the open end to the shell; the sealing connection structure has an air hole, so that the interior of the telescopic tube is connected to the outside through the opening of the open end and / or the through-hole structure.

[0007] In the technical solution of the present invention, a sealing connection structure is provided including a pressing member and a fastener, and at least a portion of the open end is clamped by the pressing member and the fastener. At the same time, the sealing connection structure cooperates with the housing so that the open end is sealed against the pressing member and / or the fastener, thereby sealing the open end and preventing liquid from entering the telescopic tube from the open end. At the same time, the sealing connection structure cooperates with the housing so that the sealing connection structure and the housing are sealedly connected, thereby preventing liquid from entering the telescopic tube through the sealing connection structure. At the same time, the air hole is provided so that the interior of the telescopic tube can communicate with the outside of the housing through the air hole and / or the vent hole. In this way, the sealed connection of the open end of the telescopic tube is ensured, and the telescopic tube is connected to the outside of the housing to facilitate air intake and exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0009] Figure 1 This is a schematic structural diagram of an embodiment of the skin treatment device of the present invention;

[0010] Figure 2 for Figure 1 A schematic structural diagram of an embodiment of a middle handpiece;

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

[0012] Figure 4 This is a schematic structural diagram of another embodiment of the skin treatment device of the present invention;

[0013] Figure 5 This is a schematic diagram of the internal structure of a cutter head according to an embodiment of the present invention;

[0014] Figure 6 This is a structural diagram of another embodiment of the cutter head of the present invention;

[0015] Figure 7 This is a structural diagram of another embodiment of the cutter head of the utility model;

[0016] Figure 8 This is a structural diagram of an embodiment of the telescopic tube in the present utility model;

[0017] Figure 9 This is a structural diagram of another embodiment of the telescopic tube in the present invention;

[0018] Figure 10 This is a structural diagram of an embodiment of the first bracket in the present utility model;

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

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

[0021] Figure 13 for Figure 12 Schematic diagram of the internal structure of the middle fixed part;

[0022] Figure 14 This is a schematic diagram of the internal structure of another embodiment of the cutter head of the present utility model;

[0023] Figure 15 This is a structural diagram of an embodiment of a sealed connection structure in the present utility model;

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

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

[0026] Figure 18 This is a structural diagram of an embodiment of the driving mechanism of the present utility model;

[0027] Figure 19This is a structural diagram of another embodiment of the driving mechanism of the present invention;

[0028] Figure 20 This is a structural diagram of another embodiment of the driving mechanism of the present invention;

[0029] Figure 21 This is a structural diagram of an embodiment of the swing structure of the present invention;

[0030] Figure 22 This is a structural diagram of an embodiment of the card slot in the utility model;

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

[0032] Figure 24 for Figure 23 Schematic diagram of the local enlarged structure at A in the middle;

[0033] Figure 25 for Figure 23 Schematic diagram of the local enlarged structure at B in the middle;

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

[0035] Figure 27 for Figure 26 Schematic diagram of the local enlarged structure at C in the middle;

[0036] Figure 28 for Figure 26 Schematic diagram of the local enlarged structure at E in the middle;

[0037] Figure 29 This is a structural diagram of an embodiment of the packaging film structure of the present utility model;

[0038] Figure 30 This is a structural diagram of an embodiment of a handheld device in the present utility model;

[0039] Figure 31 This is a structural diagram of another embodiment of the handpiece in the present invention;

[0040] Figure 32 This is a structural diagram of another embodiment of the handpiece in the present utility model;

[0041] Figure 33 This is a structural diagram of another embodiment of the handheld device of the present invention;

[0042] Figure 34 This is a structural diagram of an embodiment of the back shell of the utility model;

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

[0044] Figure 36 for Figure 35 Schematic diagram of the local enlarged structure at F in the middle;

[0045] Figure 37 for Figure 35 Schematic diagram of the local enlarged structure at G in the middle;

[0046] Figure 38 This is a structural diagram of another embodiment of the handheld device of the present invention;

[0047] Figure 39 for Figure 38 Schematic diagram of the local enlarged structure at H in the middle;

[0048] Figure 40 This is a structural diagram of an embodiment of a position limiting cover plate in the utility model;

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

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

[0051] Figure 43 This is a schematic structural diagram of an embodiment of a buffer pad in the present utility model;

[0052] Figure 44 This is a structural diagram of an embodiment of the driving structure of the present utility model;

[0053] Figure 45 This is a structural diagram of another embodiment of the driving structure of the present utility model;

[0054] Figure 46 This is a structural diagram of an embodiment of the main housing of the present invention;

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

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

[0057] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0059] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0060] In addition, the descriptions of "first", "second", etc. in this utility model are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0061] The present utility model mainly proposes a skin treatment device, which is mainly used for caring for and treating human skin, and mainly realizes beauty effects such as beauty, lifting, and wrinkle removal by injecting ultrasonic waves into the skin. In this application, ultrasonic beauty devices and ultrasonic care devices are mainly used as examples. The skin treatment device in this application has many different improvements, such as the driving form and structure of the transducer, the structural design of the water pressure fluctuation generated during the movement of the balance transducer, etc., which will be reflected in different embodiments respectively. The following embodiments will specifically introduce the specific structure of the skin treatment device. The skin treatment device usually includes a handheld part and a therapy head. The handheld part is used for people to hold when using it. The therapy head can be in various forms, such as an ultrasonic head, a phototherapy head, etc. The handheld part and the therapy head can be a fixedly connected integrated setting, or a detachable separate setting.

[0062] To facilitate understanding of the technical solutions of this application, the working principle of the important solutions of this application will be briefly introduced. The skin treatment device includes a handpiece 10 and a cutting head 20. The handpiece 10 includes a drive assembly 210, a transmission shaft 250 connected to the drive assembly 210, and a first magnetic member 260 provided at the drive end of the transmission shaft 250. The cutting head 20 includes a housing 600, a transducer assembly 700 and a sealing connection assembly 800 disposed within the housing 600. The housing 600 has a sound wave outlet 611 for ultrasonic emission. The sealing connection assembly 800 includes a sealing telescopic tube 810 and a second magnetic member 820 fixedly mounted within the sealing telescopic tube 810. The housing 600 is detachably mounted on the handpiece 10. The transmission shaft 250 is used to extend into the sealing telescopic tube 810 and is used to magnetically connect to the second magnetic member 820 via the first magnetic member 260, so as to drive the transducer assembly 700 to move in a first direction. A drive mechanism 900 is disposed within the cutter head 20 and is in transmission connection with the transducer assembly 700. The drive mechanism 900 is configured 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 may be the same direction). The plane defined by the first and second directions is the path plane. The path plane is parallel to the acoustic wave outlet 611, and the parallel arrangement of the two is used as an example.

[0063] Regarding the working principle of the therapy head, a brief explanation is given using the ultrasound head as an example. When the ultrasound care device is performing care, the transducer inside the ultrasound head forms focused ultrasound, so that a care point is formed in the lower layer of the skin, which plays the role of anti-aging, lifting or wrinkle removal. For example, the ultrasound care device exceeds the depth limit of traditional non-surgical equipment and penetrates deep into the SMAS (Superficial Musculo-Aponeurotic System) fascia layer. The ultrasonic energy gathers at the care point, generating high temperature, causing the target tissue to shrink under high temperature, and stimulates collagen regeneration, which plays the role of anti-aging, wrinkle removal, firming, lifting, and shrinking contours. The energy waves generated by the transducer can directly act on the fascia layer, causing the fascia layer to contract. In some schemes, in order to adjust the acoustic impedance so that the ultrasonic transducer can work efficiently, the ultrasonic transducer is set to work in a liquid environment.

[0064] The specific structure of the skin treatment device will be mainly described below.

[0065] Reference Figures 1 to 6In an embodiment of the present invention, the skin treatment device includes a handpiece 10 and a cutting head 20. The handpiece 10 and the cutting head 20 may be fixedly connected as an integral structure or detachably separated. In this embodiment, a detachable connection between the handpiece 10 and the cutting head 20 is used as an example. The handpiece 10 and the cutting head 20 may be connected in a variety of ways, such as by snap-fit ​​connection, connection with fasteners such as screws, threaded connection, magnetic connection, adhesive connection, hot melt welding, etc., and no particular limitation is imposed herein.

[0066] In some embodiments, to expand the effective area while reducing the frequency with which the user must move the skin treatment device, the transducer within the cutting head 20 is configured to be 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 cutting head 20, or providing a drive structure 200 within the handpiece 10 to drive the transducer to move before passing through a transmission member. Of course, in some embodiments, drive structures 200 can be provided within both the handpiece 10 and the cutting head 20. These two drive structures 200 can drive the transducer to move independently of each other, or they can cooperate with each other to drive the transducer to move.

[0067] The structures of the cutter head 20 and the handpiece 10 are respectively introduced below.

[0068] Please refer to Figures 4 to 11 The cutting head 20 includes a housing 600, a transducer assembly 700 (providing an ultrasonic transducer 750 and its transducer bracket 710) and a sealing connection assembly 800 (providing an environment and connection components for sealing connection with the handpiece 10) disposed in the housing 600, and a packaging membrane structure 950 (providing a packaging sound wave outlet 611 structure and a skin fit detection structure) disposed in the sound output area 21 of the housing 600. In other embodiments, the cutting head 20 may further include a driving mechanism 900 (for driving the ultrasonic transducer 750 to move within the housing 600), a transmission mechanism 920 (for transmitting the power of the driving mechanism 900 to the ultrasonic transducer 750, so that the ultrasonic transducer 750 moves), and a hydraulic balancing member (for balancing the changes in the liquid pressure within the housing 600 to reduce liquid fluctuations), etc. Of course, in some embodiments, in order to facilitate communication or control, the cutting head 20 may also include an electronic control board, which may be electrically connected to the transducer assembly 700, the packaging membrane structure 950, the drive mechanism 900, and one or more of the handpiece 10.

[0069] Among them, the overall shape of the shell 600 can be many, such as the overall shape of a square (cube, cuboid), a frustum, etc., which are not particularly limited here. The shell 600 has an installation cavity 610, a connecting hole 612 and a sound wave outlet 611. In some embodiments, there may also be a vent 613. Among them, the sound wave outlet 611 is formed on one side of the shell 600, and is used for the sound waves emitted by the ultrasonic transducer 750 to be transmitted from the installation cavity 610. The sound wave outlet 611 corresponds to the sound output area 21, and the packaging membrane structure 950 is sealed and connected to the sound wave outlet 611 to prevent the liquid in the installation cavity 610 from leaking.

[0070] The housing 600 can be assembled in various forms, such as a front and rear housing, a left and right housing, an upper housing 650 and a lower housing 660, etc., without any particular limitation. The following description mainly uses the upper housing 650 and the lower housing 660 as an example, wherein the sound wave outlet 611 is located on the upper housing 650.

[0071] In order to prevent liquid from leaking from the housing 600, the upper shell 650 is sealed with the lower shell 660. The upper shell 650 and the lower shell 660 can be sealed in many ways, such as by sealing glue, hot melt connection, 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 sealant layer can be provided within the sealing recess 653 to enhance the sealing connection. The sealing connection between the upper shell 650 and the lower shell 660 is located in or approximately in the same vertical plane, thus preventing poor sealing due to misalignment of the connection.

[0073] The communication hole 612 and the vent hole 613 can be provided on the upper shell 650 or the lower shell 660. In some embodiments, they can be partially provided on the upper shell 650 and partially provided on the lower shell 660. This is not particularly limited herein, and the example of both being provided on the upper shell 650 is taken. During assembly, the components within the housing 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 further includes a decorative shell 670, which is disposed on the exterior of the housing 600. The decorative shell 670 can be connected to the housing 600 in many ways, such as by snap connection, screw fastening connection, adhesive connection, etc., which are not particularly limited here.

[0075] In some embodiments, the decorative shell 670 and the housing 600 are connected by a snap fastener, which facilitates installation and removal of the two. In other embodiments, to improve the sealing of the connection between the decorative shell 670 and the housing 600 and prevent water, mosquitoes, dust, etc. from entering the space between the two, a sealant layer can be provided at the contour boundary between the two to seal the space enclosed by the two.

[0076] In some embodiments, the decorative shell 670 covers at least a portion of the housing 600, and the vent 613 is concealed by the decorative shell 670, thereby preventing the vent 613 from being directly exposed to the external environment and preventing moisture, dust, and insects from entering the balancing telescopic tube 830. Furthermore, when the decorative shell 670 is mated with the housing 600, a ventilation space is formed at the location of the vent 613, connecting the balancing telescopic tube 830 to the ventilation space, facilitating air intake and exhaust for the balancing telescopic tube 830.

[0077] Regarding the connecting hole 612 and the vent hole 613, the connecting hole 612 and the vent hole 613 pass through the side wall of the shell 600, and the two are located on adjacent or opposite side walls of the shell 600, with the side walls where the two are located being arranged opposite to each other and being arranged adjacent to the side wall where the sound wave outlet 611 is arranged as an example.

[0078] In some embodiments, the communication hole 612 and the vent hole 613 have the same depth direction and are symmetrically positioned with respect to the transducer assembly 700 .

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

[0080] The connecting hole 612 and the vent hole 613 can pass through the side wall in many directions. In this embodiment, the connecting hole 612 and the vent hole 613 pass through the side wall along the thickness direction of the shell 600 as an example, so that the shell 600 installation cavity 610 is connected with the outside of the shell 600 (when no other components are set, the installation cavity 610 and the outside of the shell 600 are connected. When other components are set, the specific objects of connection can be determined according to the situation. For example, when a tube body is set in the shell 600, the objects of connection of the connecting hole 612 and the vent hole 613 may be the inside of the tube body and the outside of the shell 600).

[0081] The shapes of the connecting hole 612 and the vent hole 613 can be various, such as circular, square, triangular, elliptical, plum blossom, etc., and 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 special restrictions are made here. It is worth noting that no matter what order the introduction is made, it will not affect the mutual combination and function of the various parts, nor should it affect the combination of elements (component features, connection relationship features, position relationship features, technical solutions) in different embodiments by those skilled in the art (except for those determined by those skilled in the art to be incompatible with each other). When describing each component, it can be introduced directly separately or put into a complete embodiment for introduction (with a complete embodiment as a background, the role of the component can be better demonstrated)

[0083] The following is an example of a specific description sequence. First, the structures related to the communication hole 612 and the vent hole 613 are introduced, such as the sealing connection assembly 800 and its connection, the balance member and its connection, the transducer assembly 700 and its connection, and the structure of the drive mechanism 900. Then, the structures related to the acoustic wave outlet 611, such as the packaging membrane structure 950, are introduced.

[0084] The sealed connection assembly 800 is introduced in the context of a complete embodiment.

[0085] Please refer to Figures 4 to 14 In some embodiments, a skin treatment device includes a handpiece 10 and a cutting head 20, wherein the handpiece 10 includes a drive assembly 210, a transmission shaft 250 drivingly connected to the drive assembly 210, and a first magnetic member 260 disposed at the drive end of the transmission shaft 250. The cutting 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 communication hole 612, and the communication hole 612 passes through the side wall of the housing 600. The transducer assembly 700 is movably disposed within the mounting cavity 610. The sealed connection assembly 800 includes a sealed telescopic tube 810 and a second magnetic member 820 fixedly mounted within the sealed telescopic tube 810. A fixing portion 819 is formed on the sealed telescopic tube 810 at a location corresponding to the second magnetic member 820. The fixing portion 819 is a self-sealing structure and is fixedly connected to the transducer assembly 700. The sealed telescopic tube 810 has an open end 811, which is sealedly connected to the housing 600 and communicates with the connecting hole 612. The housing 600 is detachably mounted on the handpiece 10. The drive shaft 250 is configured to extend into the sealed telescopic tube 810 through the connecting hole 612 and the open end 811, thereby magnetically connecting to the second magnetic member 820 to drive the transducer assembly 700 to move.

[0086] Specifically, in this embodiment, the sealed connection assembly 800 includes a sealed telescopic tube 810 and a second magnetic member 820 fixedly mounted within the sealed telescopic tube 810. The first magnetic member 260 and the second magnetic member 820 are components that have magnetic adsorption capabilities (such as magnets, lodestones, electromagnets 930, etc.) or are capable of being magnetically adsorbed (such as metallic iron or an alloy containing iron). Based on the mutual adsorption capabilities of the first magnetic member 260 and the second magnetic member 820, the example in which both the first magnetic member 260 and the second magnetic member 820 are magnets is used.

[0087] The first magnetic member 260 and the second magnetic member 820 can be in many forms, such as block, column, pancake, etc., and their overall shape can be circular, triangular, elliptical, square, etc., for example, to match the cross-sectional shape of the sealing telescopic tube 810.

[0088] The sealed telescopic tube 810 can be in many forms, such as a bellows, an elastic tube, etc., as long as it can be stretched and compressed when subjected to external force. No special limitation is made here, and the bellows is taken as an example.

[0089] The seal in the sealed expansion tube 810 refers to the sealing and isolating of the internal space and the mounting cavity to prevent liquid from entering the tube. The fixing portion 819 on the sealed expansion tube 810 can take many forms, such as a bump, a rib, or the wall of the sealed expansion tube 810. The fixing portion 819 can be connected to the transducer assembly 700 in a variety of ways, including a snap-fit ​​connection, a slot connection, a magnetic connection, or fasteners such as screws and cable ties.

[0090] The self-sealing structure refers to a structure in which the sealed telescopic tube 810 is sealed at the fixed portion 819 through its own structure. For example, the fixed portion may be provided at a closed end or formed in the middle of the sealed telescopic tube 810. At this location, the internal space of the sealed telescopic tube 810 is sealed and isolated from the external environment of the sealed telescopic tube 810, and water, gas, dust, etc. from the external environment cannot enter the sealed telescopic tube 810 through this location. In this way, liquid in the mounting cavity 610 cannot enter the sealed telescopic tube 810 through the fixed portion 819 (where the sealed telescopic tube 810 connects to the transducer assembly 700). Furthermore, there is no need to provide an additional sealing structure between the sealed telescopic tube and the transducer assembly. The fixed portion is a self-sealing structure, and the seal is stable and durable, thereby improving the stability of the skin treatment device during use.

[0091] After the open end 811 of the sealed telescopic tube 810 is connected to the communication hole 612, that is, after the open end of the sealed telescopic tube is sealedly connected to the communication hole of the housing, a communication channel 868 is formed at the sealed connection, communicating with the interior of the sealed telescopic tube. The interior space of the sealed telescopic tube 810 is connected to the exterior of the housing 600 through the communication channel 868. The communication channel 868 refers to the passage that connects the interior of the telescopic tube with the exterior of the housing 600 after the telescopic tube is sealedly connected to the sidewall of the housing 600. The telescopic tube can be the sealed telescopic tube 810 or the balancing telescopic tube 830. The communication channel 868 can take various forms, including a single hole structure or a combination of multiple hole structures. For example, it can be a port at the open end 811 and / or the communication hole 612. This allows the drive shaft 250 to enter the sealed telescopic tube 810 from the exterior of the housing 600 through the communication channel 868 (the communication hole 612 and the open end 811) and connect to the second magnetic member 820. There are many ways to seal the opening end 811 to the inner wall of the shell 600, such as through adhesive sealing connection, hot melt connection, screws and other fasteners. Of course, in some embodiments, the sealing connection can also be achieved through additional components, such as the sealing connection structure 850.

[0092] In this embodiment, by sealingly connecting the open end of the sealing telescopic tube 810 to the communication hole of the housing 600, the housing 600 is sealed by the sealing telescopic tube 810 to prevent leakage of liquid within the housing 600. Furthermore, a communication channel 868 is formed at the sealed connection, communicating with the interior of the sealing telescopic tube 810. This allows for ventilation and allows the drive shaft 250 to extend into the sealing telescopic tube 810. By configuring the portion where the sealing telescopic tube 810 connects to the transducer assembly 700 as a self-sealing fixed portion, the connection between the sealing telescopic tube 810 and the transducer assembly 700 is facilitated without requiring an additional sealing structure between the sealing telescopic tube 810 and the transducer assembly 700. Furthermore, the self-sealing fixed portion provides a stable and durable seal, thereby improving the stability of the skin treatment device during use. Furthermore, the connection between the sealing telescopic tube 810 and the transducer assembly 700 is sealed, thereby isolating the space within the sealing telescopic tube 810 from the mounting cavity and communicating with the external environment, thereby ensuring that the drive shaft 250 and the second magnetic member 82 are in a sealed state. 0 does not come into contact with the liquid in the housing 600, thereby preventing corrosion of the drive shaft 250 and the magnet, which could affect the lifespan of the skin treatment device and prevent leakage. Simultaneously, the second magnetic member 820 is disposed within the sealed telescopic tube 810 and fixedly connected to the transducer assembly 700 via a fixing portion. This allows the transducer assembly 700 to move through the magnetic connection between the first magnetic member 260 and the second magnetic member 820. Furthermore, direct contact between the first magnetic member 260 and the second magnetic member 820 enhances the magnetic attraction effect, allowing the drive assembly 210 and the drive shaft 250 to stably and reliably drive the transducer assembly 700. Furthermore, the magnetic connection between the first magnetic member 260 and the second magnetic member 820 facilitates the detachable connection between the blade head and the housing 600, facilitating replacement of the blade head 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 sealing telescopic tube 810, and the installation groove 813 is arranged corresponding to the fixing portion 819, that is, the installation groove 813 is arranged on the inner side of the fixing portion 819, and the second magnetic component 820 is installed in the installation groove 813.

[0094] Specifically, in this embodiment, the mounting groove 813 can have various forms, including a continuous groove or multiple grooves arranged at intervals. At least a portion of the second magnetic member 820 is mounted within the mounting groove 813. This can significantly improve the mounting stability of the second magnetic member 820 and facilitate the use of the hardness of the second magnetic member 820 to achieve a fixed connection with the transducer assembly.

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

[0096] In this embodiment, taking the example of the mounting grooves 813 all corresponding to the inner side of the fixing portion 819, this can increase the connection area between the second magnetic component 820 and the transducer assembly 700, and is also beneficial to the use of the hard second magnetic component 820 so that it can be better fixed, which is beneficial to improving the installation stability. In some embodiments, in order to further improve the installation stability of the second magnetic component 820, the mounting groove 813 is an annular groove, and the edge of the second magnetic component 820 is clamped in the annular groove. By setting the mounting groove 813 as an annular groove, the periphery of the second magnetic component 820 is completely clamped by the annular groove, which increases the matching area and force uniformity between the second magnetic component 820 and the mounting groove 813, which is beneficial to the stable installation of the second magnetic component 820.

[0097] There are various working conditions regarding the form of the sealed telescopic tube 810 and the position of the fixing portion 819, such as the fixing portion 819 being located at the end of the sealed telescopic tube 810 away from the open end 811, the fixing portion 819 being located in the middle of the sealed telescopic tube 810, the end away from the open end 811 being the self-sealing end 812, the end away from the open end 811 being the end with an opening, etc., which are described below with examples.

[0098] In some embodiments, the sealed telescopic tube 810 further has a self-sealing end 812, with the fixing portion 819 and the second magnetic member 820 located at the self-sealing end 812. In this embodiment, the end of the sealed telescopic tube 810 away from the open end 811 is the self-sealing end 812, and the fixing portion 819 is formed at the self-sealing end 812. As the transducer assembly 700 drives the sealed telescopic tube 810 to move, the entire sealed telescopic tube 810 can be stretched or compressed, significantly improving the utilization rate of the sealed telescopic tube 810. Furthermore, this can facilitate easier installation.

[0099] Furthermore, a mounting space 814 with one end open is formed at the self-sealing end 812. Specifically, the mounting space 814 can be formed by an annular groove and an end surface. The second magnetic member 820 is enclosed within the mounting space 814, with the side of the second magnetic member 820 facing away from the opening abutting against the inner sidewall of the mounting space 814 (i.e., the inner side of the end surface). Forming the mounting space 814 at the self-sealing end 812 allows the second magnetic member 820 to be enclosed within the sealed telescopic tube 810, significantly improving the connection stability between the second magnetic member 820 and the sealed telescopic tube 810. Furthermore, abutting the side of the second magnetic member 820 facing away from the opening against the inner sidewall of the mounting space 814 facilitates rapid positioning of the second magnetic member 820 within the sealed telescopic tube 810. It is understood that when installing the second magnetic member 820 into the sealed telescopic tube 810, the second magnetic member 820 is placed into the tube from the open end 811 and then moved to the designated position of the sealed telescopic tube 810. Due to the provision of the installation space 814, the second magnetic member 820 can be directly pushed to the end of the self-sealing end 812. The inner side wall of the installation space 814 (the inner side wall opposite the open end) will press against the second magnetic member 820 to limit the position. In this way, the second magnetic member 820 can be quickly and accurately installed in the designated position of the sealed telescopic tube 810.

[0100] In some embodiments, the fixing portion 819 can be formed between the two ends of the sealed telescopic tube 810, forming a first telescopic portion 81a and a second telescopic portion 81b on either side of the fixing portion 819. The first telescopic portion 81a has an open end 811, and the end of the second telescopic portion 81b, which is remote from the fixing portion 819, is formed as a self-sealing end 812 connected to the housing 600. Alternatively, the end of the second telescopic portion 81b, which is remote from the fixing portion 819, is sealedly connected to the housing 600. In this embodiment, the fixing portion 819 is located in the middle of the sealed telescopic tube 810, so 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 telescopic portion is compressed, and when the first telescopic portion 81a is compressed, the second telescopic portion 81b is stretched.

[0101] The first telescopic portion 81a is connected to the external environment through the open end 811, allowing the gas inside to be easily discharged and inhaled. The second telescopic portion 81b can be connected to the first telescopic portion 81a, or it can be connected to the exterior of the housing 600 through an end away from the first telescopic portion 81a. In this way, the second telescopic tube can also be connected to the outside directly (through the end away from the first telescopic portion 81a) or indirectly (through communication with the first telescopic portion 81a). Of course, in some embodiments, the second telescopic portion 81b may be closed at both ends.

[0102] It can be understood that in the scheme where both the first telescopic part 81a and the second telescopic part 81b are connected to the outside, in 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 helping to reduce the pressure change and oscillation degree of the liquid filled in the shell, thereby reducing the risk of damage to the sound-transmitting membrane 951 on the one hand, and reducing the generation of bubbles on the other hand to improve the ultrasonic energy transmission effect.

[0103] It is worth noting that there are various ways to connect the second telescopic portion 81b to the outside, as exemplified below. Specifically, when the end of the second telescopic portion 81b, remote from the fixed portion 819, is formed as a self-sealing end 812 connected to the housing 600, the second magnet can be provided with a connecting hole 821 connecting the first telescopic segment and the second telescopic segment, and / or the fixed portion can be provided with a connecting hole 821. By providing the connecting hole 821 in the second magnetic member 820, the first telescopic portion 81a and the second telescopic portion 81b are connected, thereby allowing the second telescopic portion 81b to communicate with the external environment through the first telescopic portion 81a.

[0104] The connecting hole 821 of the second magnetic member 820 refers to the space that extends through the second magnetic member 820. This is a broad concept of a hole structure and does not only refer to an annular hole, but can also refer to a partial hole, such as a notch. For example, the connecting hole 821 of the second magnetic member 820 is formed at the edge of the second magnetic member 820. In this way, the middle portion of the second magnetic member 820 is magnetically attached to the first magnetic member 260, and the edge can be fixedly connected to the transducer bracket 710 via the fixing portion 819, allowing gas to pass through.

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

[0106] In some embodiments, in order to more accurately connect the first magnetic member 260 and the second magnetic member 820, the centroid of the second magnetic member 820 is adjacent to the straight line on which the axis of the connecting hole 612 lies. Thus, in this embodiment, by placing the centroid of the second magnetic member 820 adjacent to the straight line on which the axis of the connecting hole 612 lies, the centroid of the second magnetic member 820 is brought closer to the centroids of the transmission shaft 250 and the first magnetic member 260 (the transmission shaft 250 and the first magnetic member 260 move along a straight line through the connecting hole 612 into the sealed telescopic tube 810), thereby enabling the first magnetic member 260 to be very accurately aligned with the second magnetic member 820 when entering the sealed telescopic tube 810 along the transmission shaft 250, thereby enabling a more accurate connection between the first magnetic member 260 and the second magnetic member 820.

[0107] In some embodiments, in order to maximize the contact area between the first magnetic member 260 and the second magnetic member 820 and improve the stability of the connection, the thickness direction of the second magnetic member 820 is consistent with the length direction of the sealed telescopic tube 810, so that the larger surface of the second magnetic member 820 faces the connecting hole 612. In this way, when the first magnetic member 260 enters the sealed telescopic tube 810 and is magnetically attracted to the second magnetic member 820, the larger surface of the second magnetic member 820 is aligned with the first magnetic member 260, which can increase the contact area between the first magnetic member 260 and the magnetic member, thereby improving the magnetic attraction between the first magnetic member 260 and the second magnetic member 820.

[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 hole 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, and 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 area of ​​the second magnetic member 820. Specifically, in this embodiment, the transducer assembly 700 can move as a whole along the second direction, and there can be many moving structures, such as driven by a motor, driven by a hydraulic pump, etc. The moving surface determined by the first direction and the second direction can be parallel to the sound wave outlet 611 of the shell 600, or can have a certain angle with the sound wave outlet 611. Of course, in some embodiments, it can also be perpendicular to the sound wave outlet 611. No special limitation is made here, and the moving surface is set in parallel with the sound wave outlet 611 as an example. By setting the connection position, the first magnetic member 260 can be accurately and reliably connected to the second magnetic member 820 when entering the sealed telescopic tube 810. In this way, the convenience of connecting the first magnetic member 260 and the second magnetic member 820 is greatly improved.

[0109] There are many ways to connect the second magnetic member 820 to the transducer assembly 700, and please refer to the following embodiments for details. The structure of the transducer assembly 700 is involved, and to more clearly describe the connection method between the second magnetic member 820 and the transducer assembly 700, the structure of the transducer assembly 700 in some embodiments will be specifically described.

[0110] Illustratively, the transducer assembly 700 includes a transducer holder 710 and an ultrasonic transducer 750 disposed on the transducer holder 710 .

[0111] The transducer bracket 710 can be in many forms, for example, it can be an independent bracket or a bracket composed of multiple brackets. No special limitation is made here and it will be specifically introduced in the following embodiments according to different working conditions.

[0112] Exemplarily, the transducer bracket 710 includes a mounting bracket 716 for fixing and mounting the ultrasonic transducer 750, and an assembly bracket 717 for cooperating with other components (e.g., the housing 600, the second magnetic member 820, the drive mechanism 900, etc.). The assembly bracket 717 can be an independent bracket or a combined bracket, which is not particularly limited herein. Hereinafter, an example is given in which the assembly bracket 717 includes a detachable first bracket 711 and a second bracket 712. The transducer assembly 700 will be described in more detail below in combination with specific embodiments according to different working conditions.

[0113] In some embodiments, the transducer bracket 710 is provided with a corresponding slot 720, and the second magnetic member 820 and the fixing portion 819 are fixed in the slot 720, that is, the fixing portion 819 is at least partially fixed in the slot 720, and the edge portion of the second magnetic member 820 is fixed in the slot 720. In this way, the hardness of the second magnetic member 820 can be utilized to achieve 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 integral bracket structure). When the transducer bracket 710 includes a first bracket 711 and a second bracket 712 connected together, taking the transducer as an example, the slot 720 is formed on the first bracket 711; alternatively, the slot 720 is formed on the second bracket 712; or alternatively, the first bracket 711 and the second bracket 712 enclose the slot 720.

[0115] In order to improve the stability of the second magnetic part 820 and the fixing part 819 in the slot 720, the radial dimension of the edge portion of the second magnetic part 820 that is engaged in the slot 720 is 2.1 mm to 8 mm; it can be understood that if the value is less than 2 mm, it is easy for the second magnetic part 820 to detach from the slot; if the value is greater than 8 mm, it is easy to cause waste and the size of the transducer bracket 710 needs to be increased.

[0116] There are many ways in which the first bracket 711 and the second bracket 712 can be enclosed to form the slot 720 , which will be described below with examples.

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

[0118] In other embodiments, Figure 6 、 10 As shown, the transducer bracket 710 includes a first bracket 711 and a second bracket 712 connected, and the transducer is installed 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, and the transducer is installed on the second bracket 712; the first bracket 711 has a card slot 720, and the first bracket 711 also includes a first connecting structure 713, and the first connecting structure 713 is arranged adjacent to the card 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, and the limiting portion 715 is arranged corresponding to the second magnetic component 820, and the limiting portion 715 is used to press the part of the sealing telescopic tube 810 where the second magnetic component 820 is installed to limit the second magnetic component 820 to the transducer bracket 710.

[0120] In this embodiment, the first connection structure 713 and the second connection structure 714 can be connected in many ways, such as by fasteners such as screws, by snap fasteners, etc. The first connection structure 713 and the second connection structure 714 can be in many forms, such as plate-shaped, block-shaped, columnar, etc.

[0121] In some other embodiments, the transducer bracket 710 includes a first bracket 711 and a second bracket 712, and the transducer is mounted on the second bracket 712; the second bracket 712 has a slot 720, and the second bracket 712 also includes a second connecting structure 714, which is arranged 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 arranged corresponding to the second magnetic member 820, and the limiting portion 715 is used to press the portion of the sealing telescopic tube 810 where the second magnetic member 820 is mounted, so as to limit the second magnetic member 820 to the transducer bracket 710. The specific method of this embodiment can refer to the above embodiment, the difference being 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 the present application, which are not particularly limited here. The following specific examples are given for illustration, and a more detailed description will be given in the specific usage conditions (embodiments) in the following embodiments. In some embodiments, the first bracket 711 can be an independently used component. 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 an independently used component in some embodiments. In other embodiments, it can also be a component shared (reused) with other components, for example, it can be a guide rail structure or track structure for sliding the mounting bracket 716 (fixed mounting the ultrasonic transducer 750).

[0123] The slot 720 can take many forms. The specific structure and form of the slot 720 are described below with examples. In some embodiments, the transducer holder 710 further includes a relief portion 725 connected to the slot 720. The relief portion 725 is used to at least avoid the sealing expansion tube 810. The relief portion 725 can take many forms, such as a relief space 727 (which can be a relief notch). The relief notch connects the slot 720 with the outside, allowing components to enter the slot 720 through the relief portion 725, or providing a relief space 727 for components connected to the slot 720.

[0124] In some embodiments, in order to improve the stability of the engagement between the second magnetic member 820 and the fixing portion 819, the fixing portion 819 includes an annular bottom portion 81c and an annular side portion 81d connected to both sides of the annular bottom portion 81c. The two annular side portions 81d and the annular bottom portion 81c form a mounting groove 813. The annular bottom portion 81c, at least a portion of the annular side portion 81d, and at least a portion of the edge of the second magnetic member 820 are clamped in the clamping groove 720. Among them, the fixing portion 819 is a part of the sealing telescopic tube 810 and is made of a flexible, soft or elastic material, and the second magnetic member 820 is made of a hard material. In the clamping method of this embodiment, the hard member and the soft member on both sides are simultaneously clamped into the clamping groove 720. Since the flexible, soft or elastic material will undergo elastic deformation when squeezed, it will also provide a reaction force of the same magnitude to the squeezing force. When the fixing portion 819 and the second magnetic part 820 are inserted into the slot 720, the annular bottom 81c and the annular side portions 81d on both sides undergo elastic deformation and exert a reaction force on the slot wall of the slot 720, thereby greatly improving the installation stability of the fixing portion 819 and the second magnetic part 820.

[0125] In some embodiments, in order to further improve the stability of the card slot 720 in holding the fixed portion 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 fixed portion 819. Specifically, in this embodiment, the support rib 740 can have many forms, such as blocks, strips, multiple protrusions arranged according to a certain rule, etc., which are not specifically limited here. In some embodiments, in order to improve the stability of the support rib 740 in supporting the fixed portion 819, the surface of the support rib 740 facing the fixed portion 819 is set as a support surface 741, and the overall shape of the support surface 741 is adapted to the shape of the peripheral side surface of the fixed portion 819. The support rib 740 is set 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 squeezes the fixed portion 819 and the second magnetic member 820 at the corresponding position. The support ribs 740 ensure that the sidewalls of the second magnetic member 820 and the corresponding positions of the fixing portion 819 are pressed against each other. At the same time, because the support surface 741 of the support ribs 740 is smaller than the bottom area of ​​the slot 720, under the same pressure, the support ribs 740 can provide greater pressure than the bottom of the slot 720, making the fixing portion 819 and the second magnetic member 820 more secure and more stable.

[0126] In some embodiments, the sealed telescopic tube 810 includes a deformable section 815, a mounting section 817, and a connecting section 816 connecting the deformable section 815 and the mounting section 817. The mounting section 817 forms a fixing portion 819. A second magnetic member 820 is mounted on the mounting section 817. The maximum outer diameter of the connecting section 816 is smaller than the maximum outer diameters of the deformable section 815 and the mounting section 817. At least a portion of the mounting section 817 engages with the retaining groove 720, while at least a portion of the connecting section 816 is disposed within the relief portion 725. The deformable section 815 is located outside the retaining groove 720. Thus, by segmenting the sealed telescopic tube 810 and locating the deformable section 815 outside the retaining groove 720, the deformation of the deformable section 815 is not affected by the retaining groove 720, thereby ensuring the deformation efficiency (volume change per unit length change) of the sealed telescopic tube 810. In this way, by setting the radial dimension of the connecting section 816 to the smallest of the three parts and setting it corresponding to the avoidance portion 725, the connecting section can be supported by the avoidance portion 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 installation section 817, and the side wall of the avoidance portion 725 protrudes and is inserted into the recess), thereby improving the stability of the installation section 817 (when the sealing telescopic tube 810 is subjected to axial force, the cooperation between the connecting section 816 and the avoidance portion 725 can share the load).

[0127] In some embodiments, the transducer assembly 700 further includes a guide rod 730, the ends of which are connected to the inner wall of the housing 600, and the length of the guide rod 730 is aligned with the depth of the communicating hole 612. The transducer bracket 710 is movably mounted on the guide rod 730, so that the transducer assembly 700 can be 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, etc., which are not particularly limited herein, and the circular cross-sectional shape is used as an example.

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

[0129] It is worth noting that, in some other embodiments, the retaining groove 651 may be provided on the lower shell 660 , while the retaining rib 661 may be formed on the upper shell 650 , and the specific configuration may be based on actual working conditions.

[0130] In this way, the clamping hole 652 is formed by the clamping rib 661 and the clamping groove 651. During the assembly process, the guide rod 730 can be first set at the end of the clamping groove 651, and then the clamping rib 661 can be inserted into the clamping groove 651. In this way, not only can the guide rod 730 easily enter the clamping groove 651 (inserted into the clamping hole 652), but the guide rod 730 can also be pushed against by the end of the clamping rib 661, thereby improving the installation stability of the guide rod 730.

[0131] Regarding the installation method of the two ends of the guide rod 730, they can be the same or different, as long as the clamping hole 652 at at least one end is formed by a combination of a clamping groove 651 and a clamping rib 661. Regarding the number of guide rods 730, there can be one, two, or three, etc., and there is no special limitation here. For example, two guide rods 730 are set, which are respectively located on opposite sides of the ultrasonic transducer 750. The guide rod 730 can be set on the first bracket 711 or on the second bracket 712, with setting it on 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, a guide channel for the guide rod 730 to pass through is set on the transducer bracket 710, so that the transducer bracket 710 can move along the guide rod 730.

[0132] In some embodiments, to improve the installation stability of the guide rod 730, the thickness of the retaining rib 661 is set to be greater than the 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 is exposed outside the retaining groove 651 through the notch, thereby significantly increasing the area of ​​the retaining rib 661 used to support the guide rod 730, which helps to improve the installation stability of the guide rod 730. In some embodiments, to further enhance the installation stability of the guide rod 730, the end surface 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 holding rib 661 and the holding groove 651, a snap fit is provided at the bottom of the holding groove 651 (or on the side surface of the holding rib 661 facing the bottom of the holding groove 651), and a buckle is provided on the side surface of the holding rib 661 facing the bottom of the holding groove 651 (or on the bottom of the holding groove 651). When the holding rib 661 is inserted into the preset position of the holding groove 651, the buckle and the buckle are engaged, so that the holding rib 661 and the holding groove 651 are fixed.

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

[0134] In some embodiments, the sealed telescopic tube 810 also has a self-sealing end 812, and the fixing portion 819 and the second magnetic member 820 are located at the self-sealing end 812; the cutter head 20 also includes a balancing telescopic tube 830, one end of the balancing telescopic tube 830 is connected to the inner wall of the shell 600, and the other end is connected to the transducer assembly 700 and / or the sealed telescopic tube 810; the sealed telescopic tube 810 and the balancing telescopic tube 830 are respectively arranged on both sides of the transducer assembly 700.

[0135] Here is another example, in which the sealing connection assembly 800 is applied to an embodiment of a cutting head 20. A cutting head 20 is used in a skin treatment device, the skin treatment device including a handpiece 10 detachably connected to the cutting head 20, the handpiece 10 including a drive assembly 210, a transmission shaft 250 transmission-connected to the drive assembly 210, and a first magnetic member 260 provided at the drive end of the transmission shaft 250. The cutting head 20 includes: a shell 600, the shell 600 having a mounting cavity 610 and a connecting hole 612, the connecting hole 612 passing through the side wall of the shell 600; a transducer assembly 700, the transducer assembly 700 is provided in the mounting cavity 610; a sealing connection assembly 800, the sealing connection assembly 800 including a sealing telescopic tube 810 and a second magnetic member 820 fixedly installed in the sealing telescopic tube 810, the sealing telescopic tube 810 having a fixing portion 819 formed at a portion corresponding to the second magnetic member 820, The fixed portion 819 is a self-sealing structure, and the fixed portion 819 is fixedly connected to the transducer assembly 700. The sealed telescopic tube 810 has an open end 811, which is sealed and connected to the housing 600 and communicates with the connecting hole 612. The housing 600 is detachably mounted on the handpiece 10, and the transmission shaft 250 is used to extend into the sealed telescopic tube 810 through the connecting hole 612 and the open end 811 to magnetically connect to the second magnetic member 820 to drive the transducer assembly 700 to move. In this embodiment, the working principle of the technical solution to solve the problem is the same as that of the above embodiment and will not be repeated here. The difference is that the technical solution disclosed in this embodiment is to apply the sealed connection assembly 800 to the tool head 20.

[0136] The balancing element operates by deforming under the drive of the transducer assembly 700, thereby buffering changes in the hydraulic pressure within the mounting cavity 610 and reducing fluid fluctuations. This element can take many forms, including a deformable tubular structure, such as a deformable telescopic tube. Taking the telescopic tube as an example, to distinguish it from the sealed telescopic tube 810, the balancing element will be referred to as the balancing telescopic tube 830 in the following embodiments. The balancing telescopic tube 830 can be independent of the sealed telescopic tube 810 or integrated with the sealed telescopic tube 810. The following describes different embodiments for different operating conditions.

[0137] See Figures 5 to 14 In some embodiments, in order to better balance the hydraulic pressure changes caused by the movement of the transducer assembly 700, a balancing telescopic tube 830 is provided in the shell 600. Specifically, a cutter head 20 is proposed for use in a skin treatment device, the cutter head 20 comprising: a shell 600, the shell 600 having a mounting cavity 610 and a communicating hole 612, the communicating hole 612 passing through the side wall of the shell 600; a transducer assembly 700, the transducer assembly 700 being movably disposed in the mounting cavity 610; a sealed telescopic tube 810, disposed on one side of the transducer assembly 700, the sealed telescopic tube 810 having an open end 811 and an open end 811 and a fixed end 81e (that is, one end of the sealed telescopic tube 810 is an open end, and the other end is a fixed end 81e, and the fixed end 81e can be in many forms, as long as it is fixedly connected to the transducer assembly 700. In some embodiments, it can correspond to the fixed portion 819 in the above embodiment), the open end 811 is sealedly connected to the communicating hole 61 2, so that the interior of the sealed telescopic tube 810 is connected to the outside through the open end 811 and / or the connecting hole 612, and the fixed end is connected to the transducer assembly 700; a balancing telescopic tube 830 is provided on the other side of the transducer assembly 700, and the balancing telescopic tube 830 is provided in the housing 600, and the balancing telescopic tube 830 has a first end 831 and a second end 832, the first end 831 is connected to the inner side wall of the housing 600, and the second end 832 is connected to the transducer assembly 700 and / or the sealed telescopic tube 810, and the balancing telescopic tube 830 is connected to the outside of the housing 600; the balancing telescopic tube 830 is located on the side of the transducer assembly 700 facing away from the sealed telescopic tube 810, so that when one of the sealed telescopic tube 810 and the balancing telescopic tube 830 is compressed during the movement of the transducer assembly 700, the other is stretched.

[0138] It can be understood that in the scheme described in this section, it is not limited whether the fixed end 81e must be a self-sealing end, that is, 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 sufficient for the fixed end 81e to be fixedly connected to the transducer assembly 700. It is also not limited whether a second magnetic part is provided on the inner side of the fixed end 81e, that is, a second magnetic part can be provided on the inner side of the fixed end 81e, in which case the fixed end 81e can form a fixed portion corresponding to the second magnetic part. The results of this part are basically the same as the relevant content of the previous part and do not need to be described in detail here. The second magnetic part can also be not provided on the inner side of the fixed end 81e. In this case, the second magnetic part 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 manner with the drive shaft, such as Velcro, or a negative pressure adsorption structure.

[0139] Specifically, there are various ways to connect the balancing expansion joint 830 to the exterior of the housing 600. For example, the balancing expansion joint 830 can be connected to the exterior of the housing 600 by connecting to the sealed expansion joint 810. Alternatively, the balancing expansion joint 830 can be connected to the exterior of the housing 600 by providing a vent hole 613 on the side wall of the housing 600 and sealingly connecting the first end 831 to the vent hole 613. Of course, in some embodiments, the first end 831 can also be connected to the exterior of the housing 600 via other channels (e.g., providing a connecting pipe).

[0140] Specifically, by disposing the sealed telescopic tube 810 and the balanced telescopic tube 830 on opposite sides of the transducer assembly 700, respectively, and by disposing both the sealed telescopic tube 810 and the balanced telescopic tube 830 in communication with the external environment, during the movement of the transducer assembly 700, one of the sealed telescopic tube 810 and the balanced telescopic tube 830 is compressed, while the other is stretched. Since both are in communication with the external environment, the pressure inside the two tubes is comparable to the pressure difference within the mounting cavity 610. When the transducer assembly 700 moves a certain distance, the deformations generated by the two tubes are also comparable, resulting in a very small volume change in the liquid contained in the mounting cavity 610 (the volume occupied by the compressed telescopic tube decreases, while the volume occupied by the stretched telescopic tube increases, and the volume decrease and volume increase are comparable). This prevents drastic fluctuations in the liquid during the movement of the transducer assembly 700, thereby reducing pressure changes and oscillations in the liquid filled in the housing. This, on the one hand, reduces the risk of damage to the acoustically transparent membrane 951, and on the other hand, reduces the generation of bubbles, thereby improving the ultrasonic energy transmission effect. In some embodiments, when the fixed end 812 is a self-sealing end and the second end 832 is a self-sealing end, the first end is an open end, and a vent hole 613 is provided on the side wall of the housing 600. The first end 831 is sealedly connected to the vent hole 613 to achieve communication between the balancing extension tube 830 and the exterior of the housing 600. In some embodiments, to further reduce hydraulic pressure changes caused by the movement of the transducer assembly 700, the sealed extension tube 810 and the balancing extension tube 830 are symmetrically positioned about the transducer assembly 700.

[0141] The following example illustrates how the balancing telescopic tube 830 is specifically connected to the external environment.

[0142] In some embodiments, to improve communication convenience and avoid opening additional holes in the sidewall of the housing 600, the balancing telescopic tube 830 communicates with the outside by connecting to the sealed telescopic tube 810. There are multiple ways for the balancing telescopic tube 830 to communicate with the outside environment, including direct and indirect communication.

[0143] Regarding direct communication, for example, second end 832 is connected to fixed end 81e, and second end 832 communicates with fixed end 81e, so that balancing expansion joint 830 communicates with the exterior of housing 600 through sealed expansion joint 810 and communication hole 612. In this case, a second magnetic member and a fixing portion can optionally be provided at the connection point between second end 832 and the fixed end, with the specific structure thereof being as described above. In this case, sealed expansion joint 810 and balancing expansion joint 830 can optionally be integrally provided.

[0144] Regarding indirect communication, for example, Figure 8 and Figure 15The cutter head 20 further includes a tube connection structure 840. The tube connection structure 840 is hollow and has a connecting passage 841 therein. The ends of the tube connection structure 840 are respectively connected to the sealing telescopic tube 810 and the balancing telescopic tube 830. The connecting passage 841 connects the sealing telescopic tube 810 and the balancing telescopic tube 830. The tube connection structure 840 can take many forms, including a pipeline or a hollow tube connection structure 840.

[0145] In some embodiments, to ensure that the gas within the balancing extension tube 830 can be directly exchanged with the external environment, obtaining gas closer to room temperature, a vent hole 613 is provided on the side wall of the housing 600. The vent hole 613 and the connecting hole 612 are respectively provided on either side of the transducer assembly 700, and the vent hole 613 penetrates the side wall of the housing 600. The first end 831 is open and sealed to the vent hole 613, so that the interior of the balancing extension tube 830 communicates with the outside through the opening of the first end 831 and / or the vent hole 613. It is worth noting that the specific method by which the balancing extension tube 830 communicates with the outside of the housing 600 is not limited here. The specific method can refer to the connecting channel 868 in the above embodiment.

[0146] In some embodiments, to ensure that the first end 831 of the balancing extension tube 830 is reliably sealed to the vent 613, the cutter head 20 further includes a sealing connection structure 850 for sealingly connecting the end of the balancing extension tube 830 to the sidewall of the housing 600. The sealing connection structure 850 includes an air hole 854 that connects the interior and exterior of the balancing extension tube 830. A communication channel 868 is formed at the sealed connection of the sealing connection structure 850, connecting the interior of the balancing extension tube 830 with the exterior of the housing 600. The communication channel 868 can take many forms, such as being comprised of a single component (either the air hole 854 or the vent 613) or a combination of multiple components (e.g., gas passing through the air hole 854 and the vent 613 sequentially). The ratio of the equivalent cross-sectional area of ​​the communication channel 868 to its length is 0.6-0.81, and can be 0.69, 0.71, 0.72, 0.75, 0.78, etc. The length of the communication channel 868 is 3.5 mm to 6.5 mm, and / or the equivalent cross-sectional area of ​​the communication channel 868 is 2.6 mm. 2 -4.6mm 2 .

[0147] In some embodiments, to further improve the smoothness of gas flow into and out of the balancing telescopic tube 830, the ratio of the equivalent cross-sectional area of ​​the communication channel 868 to the equivalent cross-sectional area of ​​the balancing telescopic tube 830 is 3 / 109-6 / 109; and / or the ratio of the equivalent diameter of the communication channel 868 to the equivalent diameter of the balancing telescopic tube 830 is 1 / 10-2 / 5. Of course, the above ratio setting is related to the movement speed of the transducer assembly 700. It is worth noting that the transducer assembly 700 is used to output ultrasonic waves to human skin, and its movement speed cannot be extremely fast or extremely slow. It is generally 5 mm / s-11 mm / s, and can be 6 mm / s, 7 mm / s, 8 mm / s, 9 mm / s, or 10 mm / s. It is worth noting that the provision of the air hole 854 significantly improves the stability of the liquid in the mounting cavity 610. Specifically, as the transducer assembly 700 moves along the length of the handpiece 10, the ultrasonic membrane located at the acoustic wave outlet 611 on the housing 600 will rise and fall as the transducer assembly 700 moves. With other factors remaining unchanged, before the air holes 854 are provided, the maximum difference in the position of the ultrasonic membrane's rise and fall is between 0.3 mm and 0.5 mm. After the air holes 854 are provided, the maximum difference in the position of the ultrasonic membrane's rise and fall is between 0 mm and 0.15 mm.

[0148] In some embodiments, to enhance the sealing effect of the first end 831, a sealing flange 833 is provided around the periphery of the opening of the first end 831. The cutter head 20 further includes a sealing connection structure 850 that seals and clamps the sealing flange 833 to allow for detachable connection to the housing 600. Alternatively, the sealing connection structure 850 clamps the sealing flange 833 between the sealing connection structure 850 and the housing 600. Optionally, the sealing connection structure 850 includes an air hole 854 to allow the interior of the balancing telescopic tube 830 to communicate with the exterior through the opening of the first end 831 and / or the air hole 613. In this embodiment, the sealing connection structure 850 clamps the sealing flange 833 before connecting it to the housing 600. Alternatively, the sealing connection structure 850 directly clamps the sealing flange 833 and the sidewall of the housing 600, thereby affixing the sealing flange 833 to the sidewall of the housing 600. At the same time, the sealing connection structure 850 also has an air hole 854 , so that the balancing telescopic tube 830 is in communication with the outside through the opening of the first end 831 and / or the air hole 613 .

[0149] In some embodiments, in order to improve the sealing connection between the first end 831 of the balancing telescopic tube 830 and the shell 600, a sealing flange 834 is provided on the side of the sealing flange 833 facing the inner wall of the shell 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 sizes. The sealing flange 834 with a larger radial size is arranged outside the sealing flange 834 with a smaller radial size, and a sealing groove 835 is formed between the two sealing flanges 834.

[0150] 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 installation cavity 610, reduce the process steps for sealing components installed in the housing 600, and improve the production efficiency of the cutter head 20, the present 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 introduction.

[0151] Specifically, the present application further proposes a cutter head 20 for a skin treatment device, the cutter head 20 comprising: a shell 600, the shell 600 having a mounting cavity 610 and a communicating hole 612, the communicating hole 612 passing through the side wall of the shell 600; a transducer assembly 700, the transducer assembly 700 being movably disposed in the mounting cavity 610; an integrally arranged telescopic tube, the telescopic tube comprising 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 sealing telescopic tube 810 and the balancing telescopic tube 830. The balancing telescopic tube 830 is connected at the connection or forms a self-closed structure; the sealed telescopic tube 810 and the balancing telescopic tube 830 are respectively located on both sides of the transducer assembly 700, and the end of the sealed telescopic tube 810 away from the connection is an open end 811, which is sealed and connected to the shell 600, and the open end 811 is connected to the connecting hole 612, and the end of the balancing telescopic tube 830 away from the connection is connected to the inner wall of the shell 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 sealed telescopic tube 810 and the balancing telescopic tube 830 is compressed, the other is stretched.

[0152] In this embodiment, the integrally arranged telescopic tubes are arranged on opposite sides of the transducer assembly 700. When part of the telescopic tube on one side of the transducer assembly 700 is compressed during the movement of the transducer assembly 700, part of the telescopic tube on the other side of the transducer assembly 700 will be stretched. In this way, the liquid fluctuation caused by the deformation of the telescopic tube during the movement of the transducer assembly 700 will be greatly reduced. At the same time, by arranging the telescopic tubes on opposite sides of the transducer assembly 700 as one body, since the two are an integrated structure, there is no need for additional sealing treatment of the telescopic tubes, which simplifies the complicated sealing process, helps to improve the assembly efficiency of the cutter head 20, and thus improves the production efficiency.

[0153] In some embodiments, to enhance 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. In some embodiments, to enhance the flexibility of the internal assembly of the tool head 20, improve the compactness of the assembled structure, and increase the space utilization within the mounting cavity 610, the connecting structure includes a clearance opening 842. The transducer assembly 700 includes a transducer holder 710 and an ultrasonic transducer 750 disposed on the transducer holder 710. The clearance opening 842 is configured to allow at least a portion of the transducer holder 710 to pass through.

[0154] The avoidance opening 842 can take many forms, such as being formed on a sheet or plate-like structure, or being formed by enclosing a plurality of strip-like structures. The following examples provide a detailed description. The connecting structure includes a first connecting arm 843 and a second connecting arm 844. The ends of the first connecting arm 843 are connected to the sealing telescopic tube 810 and the balancing telescopic tube 830, respectively. The ends of the second connecting arm 844 are connected to the sealing telescopic tube 810 and the balancing telescopic tube 830, respectively. 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 avoidance opening 842. In some embodiments, to increase the opening range of the escape opening 842, the first connecting arm 843 has a first escape portion 845 that bends away from the second connecting arm 844; and / or, the second connecting arm 844 has a second escape portion 725 that bends away from the first connecting arm 843. In some embodiments, to improve the compactness and stability of the structure, the end of the sealing telescopic tube 810 away from the communicating 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 some embodiments, in order to improve the connection strength of the connecting structure connecting the sealed telescopic tube 810 and the balancing telescopic tube 830, the connecting structure includes a first connecting arm 843 and a second connecting arm 844, and both ends of the first connecting arm 843 and the second connecting arm 844 are respectively connected to the sealed telescopic tube 810 and the balancing telescopic tube 830; the end of the sealed telescopic tube 810 away from the connecting hole 612 is a closed end, and a first boss 818 is provided on the end surface of the closed end, and 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 sealed telescopic tube 810 is a closed end, and a second boss 837 is provided on the end surface of the closed end, and the ends of the first connecting arm 843 and the second connecting arm 844 away from the sealed telescopic tube 810 are respectively connected to the two ends of the second boss 837.

[0155] In some embodiments, in order to further improve the stability of the movement of the telescopic tube, the sum of the lengths of the connecting structure and the balancing telescopic tube 830 in the natural state of the telescopic tube is equivalent to the length of the sealed telescopic tube 810. In some embodiments, the sealed telescopic tube 810 and the balancing telescopic tube 830 are separated, and this concept is integrated into a specific embodiment. A cutter head 20 is used for a skin treatment device, and the cutter head 20 includes: a shell 600, the shell 600 has a mounting cavity 610 and a connecting position; a transducer assembly 700, the transducer assembly 700 is movably arranged in the mounting cavity 610; the connecting position is located on one side of the movable direction of the transducer assembly 700; the telescopic tube, the telescopic tube has an open end 811 and a closed end, the open end 811 is connected to the connecting position, and the closed end is fixedly connected to the transducer assembly 700, and the transducer assembly 700 is used to drive the movement of the telescopic tube.

[0156] See Figures 15 to 17 ,as well as Figures 23 to 28 The sealing connection structure 850 is mainly used to seal the connection between the telescopic tube 810 and the balancing telescopic tube 830. The sealing connection structure 850 can be in many forms, and is briefly described with examples in the above embodiment. The following is an explanation with reference to specific embodiments.

[0157] A cutting head 20 for a skin treatment device, comprising: a housing 600, the housing 600 having a mounting cavity 610 and a through-hole structure 862, the through-hole structure 862 penetrating a side wall of the housing 600; a transducer assembly 700, the transducer assembly 700 being movably disposed within the mounting cavity 610; a telescopic tube disposed within the mounting cavity 610, one end of the telescopic tube being an open end 861, the other end being connected to the transducer assembly 700, the open end 861 being in communication with the through-hole structure 862; a sealing connection structure 850, the sealing connection structure 861 being in communication with the through-hole structure 862; 50 includes a pressing member 851 and a fastener 852 connected to the pressing member 851, and at least a portion of the open end 861 is clamped by the pressing member 851 and the fastener 852, so that the clamped portion of the telescopic tube is sealed and fits with the pressing member 851 and / or the fastener 852; the sealing connection structure 850 cooperates with the side wall of the housing 600 to seal the open end 861 to the housing 600; the sealing connection structure 850 has an air hole 854, so that the interior of the telescopic tube is connected to the outside through the opening of the open end 861 and / or the through-hole structure 862.

[0158] Specifically, in this embodiment, the specific structures of the housing 600, transducer assembly 700, and telescopic tube can be found in the above embodiments and will not be further described here. The telescopic tube can be independent of the above embodiments or integrated with them. 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 communication 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 (specifically, the 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 communication between the telescopic tube and the exterior of the housing 600 can be achieved through one or more of the open end 861, the through-hole structure 862, and additional structural components.

[0159] There are many ways to connect the pressing member 851 and the fastener 852. The two can be connected by a snap connection, a threaded connection, a screw or other fastener 852. The end of the open end 861 is clamped by the pressing member 851 and the fastener 852. It can be directly clamped by the two or indirectly clamped (meaning that in addition to clamping the open end 861, other components are also clamped, such as the side wall of the shell 600, other connecting structures, etc.). The clamped part is sealed and fitted with the component it is in direct contact with, such as the clamped part of the telescopic tube is sealed and fitted with the pressing member 851 and / or the fastener 852. There are many ways to match the sealing connection structure 850 and the side wall of the shell 600, such as through a fastener 852 such as a screw, through a snap connection, through gluing, through a thread, etc. Of course, in some embodiments, the matching can also be achieved by clamping. The air hole 854 of the sealing connection structure 850 can be formed on the pressing member 851, or in some embodiments, on the fastener 852, or on other components of the sealing connection structure 850. Of course, in some embodiments, the air hole 854 can also be formed by splicing multiple components, such as by enclosing the pressing member 851 and the fastener 852. This is not particularly limited here, and the example of the pressing member 851 having the air hole 854 is taken as an example.

[0160] In this embodiment, the sealing connection structure 850 is provided with a pressing member 851 and a fastener 852, and at least a portion of the open end 861 is clamped by the pressing member 851 and the fastener 852. At the same time, the sealing connection structure 850 cooperates with the housing 600, so that the open end 861 is sealed against the pressing member 851 and / or the fastener 852, thereby sealing the open end 861 and preventing liquid from entering the telescopic tube through the open end 861. At the same time, the sealing connection structure 850 cooperates with the housing 600, so that the sealing connection structure 850 and the housing 600 are sealed, thereby preventing liquid from entering the telescopic tube through the sealing connection structure 850. At the same time, the provision of the air hole 854 allows the interior of the telescopic tube to communicate with the exterior of the housing 600 through the air hole 854 and / or the vent 613. In this way, the open end 861 of the telescopic tube is sealed, and the telescopic tube is connected to the exterior of the housing 600 to facilitate air intake and exhaust.

[0161] There are many clamping forms for the sealing connection structure 850, which are divided into the following two categories as examples for explanation. In the first category, the sealing connection structure 850 not only clamps the telescopic tube, but also clamps the side wall of the shell 600, and is connected to the shell 600 by clamping. In this case, one of the pressing member 851 and the fastener 852 is located inside the shell 600, and the other is located outside the shell 600. In the second category, the sealing connection structure 850 clamps the telescopic tube and the connector 853, and is connected to the shell 600 through the connector 853. In this case, part or all of the pressing member 851, the fastener 852, and the connector 853 are located inside the shell 600, and the remaining part is located outside the shell 600, including the case where all are located inside the shell 600 and the case where all are located outside the shell 600. The following examples are used to illustrate each of these.

[0162] In some embodiments, the open end 861 has a sealing flange 833 at its end, and the pressing member 851 has an air hole 854. One of the pressing member 851 and the fastener 852 is located outside the housing 600, while the other is located inside the housing 600. The pressing member 851 includes a first connecting portion 855 and a pressing 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 pressing portion 856 and the clamping portion 858 clamp the sidewall of the housing 600 and the sealing flange 833. Specifically, in this embodiment, the sealing flange 833 can extend radially outward or radially outward along the extension tube. As long as the sealing flange 833 is properly sealed, the end of the extension tube can be effectively sealed. The first connection portion 855 of the pressing member 851 and the second connection portion 857 of the fastener 852 can take many forms, and no special limitation is made here. Specifically, it is related to the connection method of the first connection portion 855 and the second connection portion 857. The first connection portion 855 and the second connection portion 857 can be connected by a threaded connection, a snap connection, a screw or other fastener 852, etc., and the two are connected by a threaded connection as an example. To give a specific example, the first connection portion 855 is rod-shaped, and the pressing portion 856 is sheet-shaped or block-shaped. One end of the first connection portion 855 is connected to one side of the pressing portion 856, and the other end is provided with an external thread. The second connection portion 857 is a hole-shaped structure adapted to the first connection portion 855, and an internal thread is provided in the hole-shaped structure, and the external thread and the internal thread cooperate. The clamping portion 858 is located on the circumferential side of the hole-shaped structure. When the first connection portion 855 and the second connection portion 857 are threadedly connected, a clamping space is formed between the pressing portion 856 and the clamping portion 858. It is understood that, with appropriate adjustments to the structure, the positions of the internal thread and the external thread can be interchanged. For example, when the first connecting portion 855 is provided with an internal thread (the first connecting portion 855 has a hole structure, and the internal thread is formed in the hole structure), the second connecting portion 857 is provided with an external thread (the second connecting portion 857 has a rod structure, and the external thread is formed in the rod structure). Taking the example of the pressing member 851 being located inside the housing 600, the fastener 852 is located outside the housing 600, the pressing portion 856 presses the sealing flange 833 against the inner side wall of the housing 600, the first connecting portion 855 passes through the through-hole structure 862, and is threadedly connected to the second connecting portion 857 of the fastener 852, so that the pressing portion 856 and the clamping portion 858 clamp the side wall of the housing 600 and the sealing flange 833. After the first connecting portion 855 and the second connecting portion 857 are connected, the sealing flange 833 is located between the pressing portion 856 and the inner wall of the shell 600, and the clamping portion 858 abuts against the outer wall of the shell 600 corresponding to the pressing portion 856.In this embodiment, one of the pressing member 851 and the fastener 852 is located outside the shell 600 and the other is located inside the shell 600, and the first connecting portion 855 is configured to pass through the through-hole structure 862 and be fastened to the second connecting portion 857, so that the pressing portion 856 and the clamping portion 858 clamp the side wall of the shell 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.

[0163] In some embodiments, to improve the smooth flow of gas into and out of the telescopic tube, an air hole 854 extends through the first connecting portion 855 and the pressing portion 856. The pressing portion 856 is located on one side of the sidewall of the housing 600. 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 hole 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 extending the air hole 854 through the first connecting portion 855 and the pressing portion 856, the air hole 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, thereby achieving communication between the interior of the telescopic tube and the exterior of the housing 600.

[0164] In some embodiments, to improve the stability of the connection between the compression member 851 and the telescopic tube, the compression portion 856 is located within the telescopic tube; the open end 861 has a covering portion 863 that wraps around the edge of the compression portion 856. The covering portion 863, located between the compression portion 856 and the inner sidewall of the housing 600, forms a sealing flange 833. In this embodiment, the sealing flange 833 extends inwardly into the telescopic tube, wrapping around the edge of the compression portion 856. This ensures a stable and comprehensive fit between the compression portion 856 and the sealing flange 833. This not only improves the stability of the connection between the compression portion 856 and the telescopic tube, but also allows the sealing flange 833 to better fit the compression portion 856, thereby ensuring a good seal. At the same time, the clamping part 856 is arranged inside the telescopic tube, and the air hole 854 is set to pass through the clamping part 856 and the first connecting part 855, so that the communication path between the telescopic tube and the air hole 854 is very simple, which simplifies the matching structure of the telescopic tube and the clamping part 851 and improves the space utilization and the compactness of the structure.

[0165] Regarding the second case, in some embodiments, the sealed connection structure 850 further includes a connecting member 853. Specifically, the open end 861 of the telescopic tube has a sealing flange 833, and the air hole 854 passes through the pressing member 851. The pressing member 851 includes a first connecting portion 855 and a pressing 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 connecting member 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 to be fixedly connected to the side wall of the shell 600; the first connecting portion 855 is fastened to the second connecting portion 857, and 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 shell 600.

[0166] Specifically, compared to the above embodiment, the sealing connection structure 850 in this embodiment also includes a connector 853. In this case, there are three possible ways for the sealing connection structure 850 to cooperate with the side wall of the housing 600. The first is to clamp the side wall of the housing 600 through the pressing portion 856 and the clamping portion 858 as in the above embodiment; the second is to connect to the side wall of the housing 600 through the connector 853; and the third is to connect the side wall of the housing 600 while the pressing portion 856 and the clamping portion 858 clamp the side wall of the housing 600. In this way, the provision of the connector 853 allows the sealing connection structure 850 to seal the open end 861 to the through-hole structure 862 in a variety of ways, which is conducive to selecting an appropriate assembly method according to actual conditions. Regarding the specific installation of the pressing portion 856 and the telescopic tube, as well as the connection method of the first connecting portion 855 and the second connecting portion 857, reference can be made to the above embodiment and will not be repeated here.

[0167] In the second case, the components of the sealing connection structure 850 can be located on the same side (inside or outside) of the housing 600. Specifically, the pressing member 851, the fastener 852, and the connecting member 853 are all located inside or outside the mounting cavity 610; the pressing portion 856 and the clamping portion 858 clamp the sealing flange 833 and the extension portion 85a, and the third connecting portion 859 is fixedly connected to the inner wall of the housing 600; the air hole 854 passes through the first connecting portion 855 and the pressing portion 856. One end of the air hole 854 is connected to the telescopic tube, and the other end is connected to the through-hole structure 862, so that the telescopic tube is connected to the outside of the housing 600 through the air hole 854 and the through-hole structure 862. Taking the example of the pressing member 851, fastener 852, and connector 853 being located within the housing 600, the first connecting portion and the second connecting portion 857 are connected, the pressing portion 856 and the clamping portion 858 clamp the sealing flange 833 and the extension 85a, wherein the pressing portion 856 is in contact with the sealing flange 833, and the extension 85a is located between the sealing flange 833 and the clamping portion 858. The third connecting portion 859 can be connected to the housing 600 in a variety of ways, such as by fasteners 852 such as screws, by snap-fit ​​connection, etc. In this embodiment, taking the example of a bump or connecting post provided on the inner sidewall of the housing 600, the third connecting portion 859 is fastened to the bump or connecting post via screws.

[0168] In some embodiments, to further enhance the sealing 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 air hole 854, and the fastener 852 is at least partially located within the area enclosed by the annular rib 654. The extension 85a includes a receiving space 85b with one side open. The extension 85a covers the outer side of the annular rib 654, and 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 annular rib 654, the fastener 852 can be accommodated within the annular rib 654 and / or the receiving space 85b, effectively and efficiently utilizing space. Furthermore, 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 facilitates enhanced sealing. In some embodiments, to further enhance the sealing effect, the inner sidewall of the receiving space 85b is sealed to the outer sidewall of the annular rib 654; and / or the side of the extension 85a facing away from the telescopic tube is sealed to the inner sidewall of the housing 600. The sealing connection can be achieved in a variety of ways, such as mechanical bonding and / or by providing a sealant layer. For example, the surface where the extension 85a contacts the inner sidewall of the housing 600 can be pressed against the inner wall of the housing 600, or a sealant layer can be provided at the location of the pressing. By locating the fastener 852, the pressing member 851, and the connector 853 within the housing 600, the exterior of the housing 600 remains clean and tidy, enhancing its aesthetic appearance. Furthermore, the fastener 852, the pressing member 851, and the connector 853 are concealed from view, preventing them from being affected by external forces (e.g., accidental collisions), thereby improving the operational stability of the cutter head 20.

[0169] See Figures 18 to 22 There are many forms of the driving mechanism 900 for driving the transducer assembly 700 to move, such as by a motor, by an electromagnet 930, etc., which will be described in the following embodiments. It is worth noting that the driving mechanism 900 here refers to the driving mechanism 900 disposed in the housing 600, and the driving mechanism 900 can be used to drive the transducer assembly 700 to move along the width direction of the cutter head 20. For details, please refer to Figure 3The length, width, and height of the housing 600 are mutually perpendicular, the height direction is aligned with the opening direction of the acoustic wave outlet 611, and 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 having the cutting head 20 may comprise only the drive mechanism 900 within the housing 600, or it may also comprise the drive assembly 210 that drives the transducer assembly 700 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 handpiece 10. The following embodiments will be described using the example of the drive assembly 210 being located within the handpiece 10.

[0170] The specific form and working principle of the driving mechanism 900 will be described below in conjunction with a complete embodiment.

[0171] A skin treatment device, the skin treatment device includes a handpiece 10 and a cutting head 20, the cutting head 20 is connected to one end of the handpiece 10; the cutting head 20 includes a shell 600, and a transducer assembly 700 and a driving mechanism 900 arranged in the shell 600, the shell 600 has an acoustic wave outlet 611, and the transducer assembly 700 is arranged corresponding to the acoustic wave outlet 611; the handpiece 10 includes a driving assembly 210 and a transmission shaft 250 that is transmission-connected to the driving assembly 210, and the driving end of the transmission shaft 250 is used to connect to the transducer assembly 700; the driving assembly 210 drives the transducer assembly 700 to move in a first direction through the transmission shaft 250, and the driving mechanism 900 drives the transducer assembly 700 to move in a second direction, the first direction and the second direction are arranged crosswise, so that the first direction and the second direction determine a path plane; the path plane is arranged in parallel with the acoustic wave outlet 611, so that when the transducer assembly 700 moves in the path plane, the distance between the transducer assembly 700 and the acoustic wave outlet 611 is basically consistent.

[0172] In this embodiment, by arranging the driving mechanism 900 in the shell 600, the distance between the driving mechanism 900 and the transducer assembly 700 is shortened, thereby reducing the transmission distance and energy loss, which is beneficial to improving the transmission efficiency while improving the transmission accuracy (the short transmission distance makes the transmission speed faster and the transmission error smaller), thereby realizing the precise adjustment of the movement of the transducer assembly 700 by the driving mechanism 900; at the same time, by arranging both the driving mechanism 900 and the transducer assembly 700 in the shell 600, it is beneficial to realize the modularization of the driving mechanism 900 and the transducer assembly 700, and the two can be assembled and then installed in the shell 600, because the tool head is improved 20 assembly efficiency; at the same time, the movement in the first direction and the movement in the second direction are respectively realized by the driving component 210 and the driving mechanism 900, and the movement control in the two directions is independent of each other and can be carried out simultaneously, which is beneficial to improving the efficiency of adjustment; 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, so that the depth of action of the ultrasonic wave emitted by the ultrasonic transducer 750 on the skin is basically consistent, which is beneficial to improving the uniformity of the skin treatment device on skin therapy. In some embodiments, in order to better drive the ultrasonic transducer 750 to move, the driving mechanism 900 includes a driving 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 installed on the mounting bracket 716, the mounting bracket 716 is movably connected to the assembly bracket 717, the transmission shaft 250 and the driving motor 910 are fixedly connected to the assembly bracket 717, and the transmission mechanism 920 is transmission-connected to the mounting bracket 716.

[0173] In this embodiment, a guide groove 71c is provided on one of the mounting bracket 716 and the assembly bracket 717, and a guide rail 71d is provided on the other. The guide rail 71d is inserted into the guide groove 71c, so that the guide rail 71d can slide along the guide groove 71c, thereby allowing the mounting bracket 716 to slide relative to the assembly bracket 717. In this embodiment, a transmission mechanism 920 includes a transmission gear 921 and a transmission rack 922. The transmission rack 922 is provided on one side of the mounting bracket 716. The drive motor 910 includes a drive shaft 913, the free end of the drive shaft 913 being 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. In some embodiments, in order to ensure stable engagement between the transmission gear 921 and the transmission rack 922 and prevent the drive shaft 913 from swinging outward during operation, a limiting hole 71e is provided on the assembly bracket 717. The limiting hole 71e is provided adjacent to the transmission rack 922. The drive shaft 913 of the drive motor 910 passes through the limiting hole 71e to limit the movable area of ​​the drive shaft 913 so that the transmission gear 921 engages with the transmission rack 922.

[0174] Regarding the formation of the limiting hole 71e, in some embodiments, the assembly bracket 717 includes a bracket body and a limiting member 71f, wherein 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; alternatively, the limiting hole 71e is formed on the limiting member 71f; or alternatively, the limiting hole 71e is formed on the bracket body. In other embodiments, to improve the working stability and load-bearing capacity of the drive shaft 913, the drive shaft 913 of the drive motor 910 is provided with a limiting bearing, which is mounted on the assembly bracket 717. In some embodiments, to rationally utilize the space in the housing 600 and improve the compactness of the internal structure of the cutter head 20, the cutter head 20 is further provided with 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 an avoidance opening 842, through which the drive shaft 913 extends to one side of the mounting bracket 716.

[0175] 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. The mounting bracket 716 is movably connected to the second bracket 712. The first bracket 711 and the second bracket 712 are detachably connected. In some embodiments, to further enhance the compactness of the structure, the first bracket 711 and the second bracket 712 enclose a connecting space. A telescopic tube is also provided within the cutter head 20. One end of the telescopic tube is connected to one inner wall of the housing 600, and the other end extends through the connecting space and connects to the other inner wall of the housing 600.

[0176] There are many ways to form a connected space, which will be described in detail below with examples. The first bracket 711 includes a base 71a, and a first support platform and a second support platform provided on the base 71a, and the first support platform and the second support platform are spaced apart; the two ends of the second bracket 712 are respectively connected to the ends of the first support platform and the second support platform away from the base 71a, so that the base 71a, the second bracket 712, and the first support platform and the second support platform enclose to form a connected space. In some embodiments, in order to improve the connection stability of the first bracket 711 and the second bracket 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 from the bottom of the second bracket 712 and abuts against the bottom of the second bracket 712.

[0177] See Figures 10 to 14 In some embodiments, to further improve the space utilization and structural compactness of the components within the housing 600 of the cutter head 20, the housing of the drive motor 910 is integrally formed with a portion of the bracket of the transducer assembly 700. The above concept is incorporated into a complete technical solution for further explanation.

[0178] The present application further proposes a cutting head 20 for a skin treatment device, the cutting head 20 including: a shell 600, the shell 600 having an installation cavity 610; a transducer assembly 700, the transducer assembly 700 including an assembly bracket 717 and a transducer structure; the assembly bracket 717 including a first bracket 711 and a second bracket 712 connected, the transducer structure being movably arranged on the second bracket 712; a driving mechanism 900, the driving mechanism 900 including a driving motor 910 and a transmission mechanism 920, the transmission mechanism 920 being transmission-connected to the transducer structure and the driving motor 910, so that the transducer structure can move within the installation cavity 610 under the action of the transmission mechanism 920; the driving motor 910 including a first shell portion 911 and a second shell portion 912 being sealed and connected, the first shell portion 911 and the first bracket 711 being integrally formed.

[0179] In this embodiment, by integrally forming the first bracket 711 of the transducer assembly 700 and the first shell 911 of the drive motor 910, the process step of installing the drive motor 910 to the first bracket 711 is omitted, and the assembly process is greatly simplified; at the same time, the connection strength between the drive motor 910 and the assembly bracket 717 is increased, which is conducive to improving the installation stability; by integrally forming the first bracket 711 and the first shell 911, the connecting components connecting the two are eliminated, and the space for installing these connecting components is also saved, making the connection between the drive motor 910 and the assembly bracket 717 more compact and the space utilization rate higher.

[0180] The specific structure of the first bracket 711 is introduced in detail below. The first bracket 711 includes a base 71a and a first connecting structure 713 arranged on the base 71a. The second bracket 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 with the second shell 912.

[0181] There are many ways to seal the connection between the base 71a and the second shell 912, which are explained below with examples. A sealing groove 914 is provided on one of the base 71a and the second shell 912, and a sealing rib 915 is provided on the other, which is inserted into the sealing groove 914. In order to further improve the sealing connection effect between the base 71a and the second shell 912, a sealant can be provided in the sealing groove 914 to fill the gap between the sealing rib 915 and the sealing groove 914, thereby achieving sealing in one step. The rotor, stator and other structures of the motor are provided in the space enclosed by the first shell 911 and the second shell 912. One end of the drive shaft 913 of the drive motor 910 is fixedly connected to the rotor, and the other end extends from the base 71a to the inside of the motor. There is an axial hole on the base 71a, and the drive shaft 913 of the drive motor 910 passes through the axial hole. A sealing ring groove 916 is formed on the inner wall of the axial hole. This seals the drive shaft 913 within the shaft hole. In some embodiments, to further enhance the sealing effect of the drive shaft 913 within the shaft hole, multiple sealing ring grooves 916 are provided, spaced apart along the depth of the shaft hole; and / or sealing oil is provided within the sealing ring grooves 916. In some embodiments, to further enhance the sealing effect of the drive motor 910, a wire guide opening is provided in the first shell 911 or the second shell 912, through which the wires of the drive motor 910 pass; a sealant structure is provided within the wire guide opening.

[0182] See Figures 18 to 25 The following will describe the principle of driving the driving mechanism 900 using the electromagnet 930 in combination with a complete embodiment.

[0183] A cutting head 20 for a skin treatment device includes: a shell 600, the shell 600 having a mounting cavity 610; a drive mechanism 900, the drive mechanism 900 including at least one electromagnet 930 and at least one magnetic body 931; a transducer assembly 700, the transducer assembly 700 including a base bracket 760, a swinging structure 770 and an ultrasonic transducer 750; the portion between the two ends of the swinging structure 770 is rotatably connected to the base bracket 760, one end of the swinging structure 770 is connected to the ultrasonic transducer 750, and the other end is provided with one of the electromagnet 930 and the magnetic body 931, the other of the electromagnet 930 and the magnetic body 931 is fixedly set on the base bracket 760, and the electromagnet 930 and the magnetic body 931 are arranged adjacent to each other; when the electromagnet 930 and the magnetic body 931 are magnetically attracted or magnetically repelled, the ultrasonic transducer 750 moves within the mounting cavity 610 driven by the swinging structure 770.

[0184] In this embodiment, the swing structure 770 is rotatably mounted on the base bracket 760, and an ultrasonic transducer 750 is provided at one end of the swing structure 770, and one of the electromagnet 930 and the magnetic body 931 is provided at the other end, and the other of the electromagnet 930 and the magnetic body 931 is fixedly provided on the base bracket 760. When the ultrasonic transducer 750 is not required to move, the electromagnet 930 is powered off (the electromagnet 930 and the magnetic body 931 do not undergo magnetic attraction or repulsion, or are stably magnetically attracted together). When the ultrasonic transducer is required, When 750 moves, the electromagnet 930 is energized so that magnetic attraction or repulsion occurs between the electromagnet 930 and the magnetic body 931, so that the input end of the swing structure 770 moves, thereby achieving the purpose of moving the ultrasonic transducer 750; in this embodiment, the movement of the ultrasonic transducer 750 is achieved by the electromagnet 930 and the magnetic body 931. Compared with the use of drive motors 910, air pumps, hydraulic pumps and other components, the drive mechanism 900 is greatly simplified, and at the same time, the cost of driving the ultrasonic transducer 750 is greatly reduced, and the production cost of the cutter head 20 is reduced.

[0185] 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, which is described below with examples.

[0186] In the case where an electromagnet 930 is added, the electromagnet 930 includes a first electromagnet 932 and a second electromagnet 933. The magnetic body 931 is connected to the end of the swing structure 770 away from the transducer, and the first electromagnet 932 and the second electromagnet 933 are respectively located on opposite sides of the magnetic body 931. Alternatively, the first electromagnet 932 is connected to the end of the swing structure 770 away from the transducer, and the second electromagnet 933 and the magnetic body 931 are respectively located on opposite sides of the first electromagnet 932. In the case where a magnetic body 931 is added, there are two magnetic bodies 931. The electromagnet 930 is connected to the end of the swing structure 770 away from the transducer, and the two magnetic bodies 931 are respectively located on opposite sides of the electromagnet 930. The ends of the two magnetic bodies 931 facing the electromagnet 930 have the same magnetic poles.

[0187] In some embodiments, in order to improve the convenience of installing the magnetic body 931 or the electromagnet 930. The base bracket 760 includes a main body bracket 761 and a mounting lug 762. The mounting lug 762 protrudes in a direction away from the ultrasonic transducer 750, and the magnetic body 931 or the electromagnet 930 is mounted on the mounting lug 762. There are two mounting lugs 762, and the two mounting lugs 762 are respectively located on opposite sides of the swing structure 770. There are many ways to rotatably connect the swing structure 770 to the base bracket 760, and examples are given below to illustrate. In some embodiments, a rotating shaft 763 is provided on one of the base bracket 760 and the swing structure 770, and a rotating hole 771 is provided on the other. The rotating shaft 763 is inserted into the rotating hole 771 to rotatably connect the swing structure 770 to the base bracket 760.

[0188] 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 further includes a retaining member 780, the radial dimension of which is larger than the radial dimension of the rotating hole 771, and the retaining member 780 is engaged with the free end of the rotating shaft 763. In some embodiments, to prevent the swinging structure 770 from swinging too much and to improve the stability of the swinging structure 770, the base bracket 760 is provided with a rotating shaft 763, the swinging mechanism has a rotating portion 772, and the rotating portion 772 has a rotating hole 771. An abutting portion 773 is provided on the outer wall of the rotating portion 772, and a stopper 765 is provided on the base bracket 760 adjacent to the rotating portion 772. During the rotation of the rotating portion 772, the stopper 765 is used to abut against the abutting portion 773 to prevent the rotating portion 772 from continuing to rotate. In some embodiments, in order to improve the continuity of the swing, the transducer assembly 700 also includes a reset member 790, which 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 mounted at the connection between the swing structure 770 and the base bracket, the first elastic arm 792 is connected to one end of the swing mechanism close to the ultrasonic transducer 750, and the second elastic arm 793 is connected to the base bracket 760.

[0189] In some embodiments, a rotating shaft 763 is provided on the base bracket 760. The swing mechanism includes a rotating portion 772 having a rotating hole 771. The rotating shaft 763 is inserted into the rotating hole 771, thereby rotatably connecting the swing structure 770 to the base bracket 760. The rotating portion 772 includes a mounting post 775. The mounting portion 791 is sleeved on the mounting post 775, and the rotating hole 771 is coaxially arranged with the mounting post 775. The rotating hole 771 is formed on the mounting post 775 and extends along the length of the mounting post 775. To improve the compactness of the structure and the installation stability of the mounting portion 791, the rotating portion 772 includes a mounting groove 776. The outer wall of the mounting post 775 serves as the groove wall of the mounting groove 776. The rotating structure includes a long mounting groove 777, which is connected to the mounting groove 776. The first connecting arm 843 extends from the mounting groove 776 to the long mounting groove 777 and is fixed thereto. A limiting slot 766 is provided on the base bracket 760 adjacent to the rotating portion 772 , and the second elastic arm 793 is mounted in the limiting slot 766 .

[0190] In some embodiments, to improve space utilization within the mounting cavity 610 and enhance the compactness of the structural installation, 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 some embodiments, to increase the range of motion of the ultrasonic transducer 750, the base bracket 760 includes a first support boss 718 and a second support boss 719 spaced apart. Two guide rods 730 are further disposed within the housing 600, with their ends connected to the inner sidewall of the housing 600. The two guide rods 730 pass through the first support boss 718 and the second support boss 719, respectively. The base bracket 760 is slidably connected to the guide rods 730.

[0191] The present application further provides a skin treatment device including the cutting head 20 (using an electromagnet 930 and a magnetic body 931 as a driving mechanism 900) of the above embodiment. The skin treatment device includes a handpiece 10 and a cutting head 20, with the cutting head 20 connected to one end of the handpiece 10. The handpiece 10 includes a driving assembly 210 and a transmission shaft 250 drivingly connected to the driving assembly 210. The driving end of the transmission shaft 250 is configured to connect to the transducer assembly 700 of the cutting head 20. The housing 600 of the cutting head 20 has an acoustic wave outlet 611. The driving assembly 210 drives the transducer assembly 700 to move in a first direction via the transmission shaft 250, and the driving mechanism 900 of the cutting head 20 drives the ultrasonic transducer 750 of the cutting head 20 to move in a second direction. The first and second directions are arranged to intersect, such that the first and second directions define a path plane. When the transducer assembly 700 moves within the path plane, the distance between the transducer assembly 700 and the acoustic wave outlet 611 is substantially constant.

[0192] The above embodiment has basically described the structure related to the vent hole 613 and the communication hole 612 in the housing 600. Now, the structure related to the acoustic wave outlet 611 will be described. There are many ways to seal the encapsulation membrane structure 950 to the acoustic wave outlet 611, which will be incorporated into the complete technical solution and illustrated below.

[0193] See Figures 23 to 29In some embodiments, a razor head 20 is used in a skin treatment device. The razor head 20 includes: a housing 600 having a mounting cavity 610 and a sonic outlet 611 extending through a sidewall of the housing 600; a transducer assembly 700 disposed within the mounting cavity 610, corresponding to the sonic outlet 611, and oriented toward the sonic outlet 611. The transducer assembly 700 emits ultrasound waves directed toward the sonic outlet 611. A packaging membrane structure 950 is disposed on the housing 600 and includes a stacked acoustically transparent membrane 951, an insulating support sheet 952, and a touch-sensitive flexible circuit board 953. The acoustically transparent membrane 951 covers the sonic outlet 611, and the insulating support sheet 952 and the flexible circuit board are located between the acoustically transparent membrane 951 and the housing 600. The touch-sensitive flexible circuit board 953 is electrically connected to the electronic control board.

[0194] In some embodiments, the acoustically transparent membrane 951 includes a connection region and an acoustically transparent region. The connection region corresponds to the housing 600 surrounding the acoustic wave outlet 611, and the acoustically transparent region corresponds to the acoustic wave outlet 611. The insulating support sheet 952 and the touch-sensitive flexible circuit board 953 correspond to the connection region. In some embodiments, the touch-sensitive flexible circuit board 953 includes a touch portion and an electrical connection portion, one end of which is connected to the touch portion and the other end is electrically connected to the main control board 153 of the tool head 20. The touch portion is annular, with the inner sidewall of the touch portion flush with the inner sidewall of the acoustic wave outlet 611. The insulating support sheet 952 is annular, with the inner sidewall of the insulating support sheet 952 flush with the inner sidewall of the acoustic wave outlet 611. In some embodiments, to enhance the connection reliability of the acoustically transparent membrane 951, the insulating support sheet 952, and the touch-sensitive flexible circuit board 953, a first adhesive layer is provided between the acoustically transparent membrane 951 and the insulating support sheet 952; and / or a second adhesive layer is provided between the touch-sensitive flexible circuit board 953 and the insulating support sheet 952. The first sol layer and the second sol layer can be formed by providing hot melt adhesive, or adjacent structures can be melted together by a hot melt process.

[0195] In some embodiments, to ensure both protection and tactile sensitivity for the touch flexible circuit board 953, the ratio of the thickness of the insulating support sheet 952 to the touch flexible circuit board 953 is 2-4, 2.5-3.5, 2.7-3.2, etc.; and / or the thickness of the insulating support sheet 952 is 0.2 mm-0.4 mm, 0.25 mm-0.35 mm, 0.27 mm-0.32 mm, etc.; and / or the thickness of the touch flexible circuit board 953 is 0.05 mm-0.15 mm, 0.07 mm-0.12 mm, 0.09 mm-0.1 mm, etc. In some embodiments, to improve the installation stability of the packaging film structure 950, the packaging film structure 950 further includes a foam adhesive layer 954. One side of the foam adhesive layer 954 is bonded to the housing 600 surrounding the acoustic wave outlet 611, and the other side is bonded to the touch flexible circuit board 953.

[0196] 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 is arranged corresponding to the sound wave outlet 611. The avoidance opening 671 is sleeved on the outer side of the packaging membrane structure 950. In some embodiments, to further provide installation stability for the packaging membrane structure 950, the outer surface of the sound-transmitting membrane 951 does not protrude above the top of the edge of the avoidance opening 671; and / or the inner sidewall of the avoidance opening 671 abuts against the outer sidewall of the packaging membrane structure 950. In some embodiments, to facilitate disassembly of the housing 600 and the decorative shell 670, the edge of the sound wave outlet 611 has an annular boss 615, and the packaging membrane structure 950 is mounted on the annular boss 615. A mating gap 955 is left between the connection between the annular boss 615 and the housing 600 and the decorative shell 670.

[0197] The above embodiment primarily describes the structure of the cutting head 20 in the skin treatment device. The following focuses on the specific structure of the handpiece 10. The handpiece 10 includes a housing 100, a drive assembly 210 disposed within the housing 100, and a vibration-damping structure for reducing vibrations in the drive assembly 210; a button structure (an unlock button 510 and an activation button 133) disposed on the housing 100; and a decorative member 183 disposed on the housing 100. Again, we will first provide an overall description of the structure of the handpiece 10, and then integrate the specific structure of the handpiece 100 into the complete technical solution for further explanation.

[0198] The housing 100 includes a main shell 110 and a back shell 120. The main shell 110 has a front side 160 and a back side 150 disposed opposite each other. The main shell 110 has an assembly cavity 151, with an opening 152 of the assembly cavity 151 facing the back side 150. The back shell 120 is connected to the main shell 110 to cover the opening 152. In some embodiments, a front shell can be provided on the front side 160 of the main shell 110. The main shell 110 has a head portion 112 and a tail portion 113 disposed opposite each other. The head portion 112 has a mounting slot 170 for mounting the cutter head 20. The mounting slot 170 has a mounting slot 171 for exposing the sound output area 21 of the cutter head 20. The assembly cavity 151 and the mounting slot 170 are connected through a relief hole 111. The drive assembly 210 includes a drive motor 220 and a transmission mechanism 920. One end of the transmission shaft 250 is connected to the transmission mechanism 920, and the other end passes through the avoidance hole 111 and enters the mounting groove 170 to connect with the transducer assembly 700 of the cutter head 20 to drive the transducer assembly 700 to move in the shell 600.

[0199] The structural features of the housing 100 are described below in conjunction with a complete embodiment.

[0200] See Figures 30 to 32 ,as well as Figures 1 to 4 , an ultrasonic beauty instrument, a skin treatment device, the ultrasonic beauty instrument includes a shell 100 and a cutter head 20, the shell 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 direction of the shell 600, at least part of the placement groove 130 is located in the gripping area 140, the placement groove 130 is used for the user to place the finger when holding the ultrasonic beauty instrument; the cutter head 20 is provided on the head 112, the cutter head 20 has an installation cavity 610, a sound output area 21 and an ultrasonic transducer 750 provided in the installation cavity 610, the ultrasonic transducer 750 is used to generate ultrasonic energy that passes through the sound output area 21 and is emitted into the skin to be treated.

[0201] In some embodiments, to further enhance user convenience in holding the ultrasonic beauty device, the sound output region 21 is positioned toward one side of the housing 100, with the sound output region 21 and the placement slot 130 facing the same side of the housing 100. The housing 100 has a back side 150 and a front side 160 that are positioned opposite each other. The head 112 has a mounting slot 170, within which the blade head 20 is mounted. The mounting slot 170 has a mounting notch 171 for exposing the sound output region 21. The mounting notch 171 and the sound output region 21 face the front side 160. The placement slot 130 is formed on the front side 160 of the housing 100. To facilitate button manipulation, an activation button 133 is provided at one end of the placement slot 130 near the head 112. The activation button 133 is used to control the operation of the blade head 20. And / or, the cutter head 20 is detachably connected to the head 112 via a locking structure 500, and the locking structure 500 includes an unlocking button 510, which is used to release the lock between the cutter head 20 and the head 112; the unlocking button 510 is arranged in a position close to the head 112 in the placement slot 130.

[0202] In some embodiments, to avoid accidental key presses, the top of the activation key 133 does not protrude beyond the edge of the placement slot 130; and / or the top of the unlock key 510 does not protrude beyond the edge of the placement slot 130. In some embodiments, to improve the comfort of holding the handpiece 10, the ratio of the slot width to the slot length of the placement slot 130 is 2 / 27-7 / 27, or 3 / 27-5 / 27, etc.; and / or the slot width of the placement slot 130 is 1mm-4mm, or 2mm-3mm, etc.; and / or the slot length of the placement slot 130 is 5mm-18mm, or 7mm-15mm, or 9mm-12mm, etc.

[0203] In some embodiments, the housing 100 has a back side 150 and a front side 160 that are oppositely disposed. The placement slot 130 is formed on the front side 160. The gripping area 140 includes the placement slot 130 located within 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 located on opposite sides of the first gripping surface 121, and one second gripping surface 115 connects the first gripping surface 121 with the notch edge on one side of the placement slot 130. The first gripping surface 121 is arc-shaped or substantially arc-shaped. In some embodiments, the intersection of the first gripping surface 121 and the second gripping surface 115 forms a first edge 116, and / or the intersection of the first gripping surface 121 and the notch edge of the placement slot 130 forms a second edge 117. The first edge 116 and / or the second edge 117 extend along the length of the housing 100.

[0204] In some embodiments, the width of the first gripping surface 121 is greater than the width of the slot opening of the placement slot 130, and / or the ratio of the width B1 of the first gripping surface 121 to the width B2 of the slot opening of the placement slot 130 is 3-1.5, or 2.5-2, etc. In some embodiments, two opposing sides of the head portion 112 are provided with limiting protrusions 193, respectively. The two limiting protrusions 193 are located on either side of the placement slot 130 in the circumferential direction of the housing 100. The side of the limiting protrusions 193 facing the tail portion 113 forms a gripping area 140. The tail portion 113 is provided with limiting protrusions 195 on two opposing sides of the placement slot 130 in the circumferential direction of the housing 100. The side of the limiting protrusions 195 facing the head portion 112 forms a gripping area 140. In some embodiments, when the head portion 112 is provided with limiting protrusions 193 on opposite sides, and the tail portion 113 is provided with limiting protrusions 195 on opposite sides, the size of the limiting protrusions 193 is larger than the size of the limiting protrusions 195. In some embodiments, to improve the safety of the ultrasonic beauty device, the placement slot 130 extends from the head portion 112 to the tail portion 113 along the length of the housing 100 and penetrates the tail portion 113, so that the placement slot 130 is connected to the outside of the placement slot 130 at the tail portion 113.

[0205] In some embodiments, to improve the safety of the ultrasonic beauty device, the ultrasonic beauty device has a placement surface 191, which is used to abut against a support. When the placement surface 191 abuts against the support, the notch of the placement slot 130 faces upward. The placement slot 130 has a first guide surface 131 formed at the tail portion 113, and the distance between the first guide surface 131 and the placement surface 191 gradually decreases. The placement slot 130 has a second guide surface 132 formed at the head portion 112, and the distance between the second guide surface 132 and the placement surface 191 gradually decreases. The distance between the bottom of the placement slot 130 and the placement surface 191 gradually decreases in the direction from the head portion 112 to the tail portion 113.

[0206] See Figures 30 to 34 ,as well as Figures 46 to 48 The present application further provides a handpiece 10 for a skin treatment device, the handpiece 10 comprising: a shell 100, the shell 100 comprising a main shell 110 and a back shell 120, the main shell 110 having a front side 160 and a back side 150 arranged opposite to each other; the main shell 110 having an assembly cavity 151, the cavity opening 152 of the assembly cavity 151 facing the back side 150, the back shell 120 being connected to the main shell 110 to cover the cavity opening 152; one end of the main shell 110 has a mounting groove 170 for mounting a cutter head 20, the mounting groove 170 having a mounting groove 171 for exposing the sound outlet area 21 of the cutter head 20, and the mounting groove 171 facing the front side 160.

[0207] 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 cavity opening 152 of the assembly cavity 151 is greater than the width of the assembly cavity 151 near the front side 160. This is beneficial for the operator to install the parts from the cavity opening 152 with a larger width to the assembly cavity 151; at the same time, when the size of the sound output area 21 is constant, it is easier to position the sound output area 21 when it faces the front side 160 with a smaller width than when the sound output area 21 faces the back side 150 with a larger width, which is beneficial for the user to better align the sound output area 21 with the human skin; in addition, when the user uses the skin treatment device, when the side with a smaller width faces himself, it is more conducive to holding the handpiece 10. In this way, the handpiece 10 is convenient for assembly and also convenient for the user to hold and use.

[0208] In some embodiments, the handpiece 10 further includes a drive assembly 210 and a transmission shaft 250. The drive assembly 210 is mounted in the assembly cavity 151. A partition is provided between the assembly cavity 151 and the mounting slot 170. The partition is provided with an avoidance hole 111. One end of the transmission shaft 250 is connected to the drive assembly 210, and the other end is used to extend through the avoidance hole 111 into the mounting slot 170 to connect with the cutter head 20. In some embodiments, in order to improve the convenience of electrical connection between the cutter head 20 and the handpiece 10, a wire hole is provided on the partition. A main control board 153 is provided in the assembly cavity 151. An electrical connection board is provided on the first board surface of the partition facing the mounting slot 170. The electrical connector 853 connects the electrical connection board and the main control board 153 through the wire hole. The board surface of the electrical connection board facing the mounting slot 170 is provided with electrical connection terminals, which are used to electrically connect the cutter head 20.

[0209] In some embodiments, the drive shaft 250 extends from the assembly cavity 151 near the front side 160 to the middle of the mounting slot 170. To facilitate installation and removal of the cutter head 20 while also maximizing space utilization, the mounting slot 170 includes an insertion opening 172 that communicates with the mounting slot 171 and is disposed along the length of the drive shaft 250 away from the assembly cavity 151. The insertion opening 172 is used to allow the cutter head 20 to enter or exit the mounting slot 170. In some embodiments, to improve the reliability of the handpiece 10 when the user grips it, the housing 100 has a head portion 112 and a tail portion 113, with opposing sides of the head portion 112 provided with respective limiting protrusions 193. The two limiting protrusions 193 are located on opposite sides of the housing 100 in a circumferential direction. The main housing 110 has two opposing first limiting units 193a, and the back housing 120 has two opposing second limiting units 193b. The first limiting units 193a and the second limiting units combine to form the limiting protrusion 193. In some embodiments, the tail portion 113 has two opposing sides provided with limiting protrusions 195. The two limiting protrusions 195 are located on opposite sides of the housing 100 in a circumferential direction. The main housing 110 has two opposing first limiting units 195a, and the back housing 120 has two opposing second limiting units 195b. The first limiting units 195a and the second limiting units combine to form the limiting protrusion 195. In some embodiments, a limiting protrusion 193 is provided on opposite sides of the head 112, and the two limiting protrusions 193 are respectively located on both sides of the circumference of the shell 100; a limiting protrusion 195 is provided on opposite sides of the tail 113, and the two limiting protrusions 195 are respectively located on both sides of the circumference of the shell 100; the two limiting protrusions 193, the two limiting protrusions 195, and the shell 100 between the limiting protrusions 193 and the limiting protrusions 195 are combined to form a holding area 140 for the user to hold.

[0210] The limiting protrusion 193 can be positioned at the head 112 to limit the gripping position, preventing the handpiece 10 from being disengaged from one end of the head 112; the limiting protrusion 195 can be positioned at the tail 113 to limit the gripping position, preventing the handpiece 10 from being disengaged from one end of the tail 113. This helps improve the user's grip on the handpiece 10 when the user holds the handpiece 10 between the limiting protrusion 193 and the limiting protrusion 195 while using the skin treatment device.

[0211] See Figures 35 to 40Regarding the locking structure 500 mentioned in the above embodiment, there are many ways to implement it. The structure will be explained below by integrating it into a complete embodiment. A handpiece 10 is used for a skin treatment device, which includes a cutting head 20. The handpiece 10 includes: a shell 100, the shell 100 has an unlocking slot 155, the unlocking slot 155 has a loading and unloading slot 156, and the loading and unloading slot 156 is connected to the outside of the shell 600; a locking structure 500, the locking structure 500 is used to detachably connect the cutting head 20 to the shell 100, and the locking structure 500 can be detachably installed in the unlocking slot 155 through the loading and unloading slot 156; the locking structure 500 includes an unlocking button 510, and the unlocking button 510 is used to unlock the cutting head 20; a limiting cover plate 530, the limiting cover plate 530 is installed on the shell 100 corresponding to the unlocking slot 155; an unlocking hole 531 is opened on the limiting cover plate 530, and the unlocking button 510 is exposed to the limiting cover plate 530 through the unlocking hole 531.

[0212] In this embodiment, the unlocking slot 155 has a loading and unloading slot 156 that communicates with the exterior of the housing 600. The unlocking structure can be installed and removed through the loading and unloading slot 156. The loading and unloading slot 156 is covered by a limiting cover 530, so that the unlocking structure can be installed and removed without passing through the assembly cavity 151 of the housing 100. It can be operated only through the unlocking slot 155 and the loading and unloading slot 156. In this way, the installation and removal of the unlocking button 510 can be independent of the installation of other components within the housing 100, eliminating the need to operate the unlocking structure in the deeper assembly cavity 151. This greatly improves the convenience of installing and removing the unlocking structure, facilitating 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 the locking member 520 is connected to the unlocking button 510, and the other end extends into the mounting slot 170 for locking with the blade head 20. The locking member 520 can take many specific forms. For example, the locking member 520 may include a locking portion 523, a rotating portion 522, and an unlocking portion 521, with the rotating portion 522 positioned between the locking portion 523 and the unlocking portion 521. The unlocking portion 521 is connected to the unlocking button 510, the locking portion 523 extends into the mounting slot 170, and the rotating portion 522 is rotatably connected to the wall of the unlocking slot 155. Alternatively, the rotating portion 522 may be rotatably mounted on the side of the limiting cover plate 530 facing the unlocking slot 155, with one of the rotating portion 522 and the limiting cover plate 530 having a rotation pin, and the other having a rotation pin hole, into which the rotation pin is inserted. Regarding the coordination between the rotating portion 522 and the limiting cover plate 530, a lug can be provided on the limiting cover plate 530, with a rotation pin hole provided on the lug. A rotation pin can be provided on the rotating portion 522. The rotation pin is inserted into the rotation pin hole to rotationally connect the locking member 520 and the limiting cover plate 530. To ensure that the unlocking portion 521 has sufficient range of motion, an unlocking notch 157 is provided on the groove wall shared by the unlocking slot 155 and the mounting slot 170. When the unlocking button 510 is pressed, the unlocking notch 157 allows the locking portion 523 to swing. To improve user convenience, the housing 100 has a front side 160, with the unlocking button 510 exposed on the front side 160. The mounting slot 170 has a mounting notch 171 for exposing the sound output area 21 of the cutter head 20, with the mounting notch 171 facing the front side 160. Front side 160 is provided with a placement slot 130, which extends along the length of housing 100 and is used to place a user's fingers when holding handpiece 10. To facilitate installation of position-limiting cover plate 530, position-limiting cover plate 530 includes a plate body and a plug-in post 550. The plug-in post 550 is disposed on the plate body's surface facing unlocking slot 155. Housing 100 is provided near unlocking slot 155 with a plug-in hole 158, into which the plug-in post 550 is inserted.To enhance the stability of the installation of the limiting cover plate 530, the limiting cover plate 530 includes a covering portion 532 and a mating portion 533. The covering portion 532 is used to cover the unlocking slot 155, and the mating portion 533 is bent and overlapped at the edge of the installation slot 170 at one end away from the covering portion 532. To ensure smooth and continuous operation of the unlocking button 510, an elastic member 540 is provided at the position of the locking member 520 facing away from the unlocking button 510.

[0213] See also Figures 33 to 36 The following describes the specific situation of the decoration member 183 being installed on the housing 100, and describes this situation in conjunction with a complete embodiment.

[0214] The present application further provides an ultrasonic beauty instrument, which includes: a shell 100, the outer wall of the shell 100 has a receiving groove 185, and the bottom of the receiving groove 185 is formed with a sol groove 186; a decorative member 183, the decorative member 183 is installed in the receiving groove 185 and is exposed through the notch of the receiving groove 185, and at least a portion of the decorative member 183 extends into the sol groove 186; an adhesive layer is provided between the outer wall of the decorative member 183 and the groove wall of the receiving groove 185, and an adhesive layer is provided between the outer wall of the decorative member 183 and the groove wall of the sol groove 186; a blade head 20, the blade head 20 is arranged at one end of the shell 100; the blade head 20 has a mounting cavity 610, a sound output area 21 and an ultrasonic transducer 750 provided in the blade head 20, the ultrasonic transducer 750 is used to generate ultrasonic energy that passes through the sound output area 21 and is emitted into the skin to be treated.

[0215] In this embodiment, by setting the sol tank 186 at the bottom of the receiving tank 185, the excess glue after the receiving tank 185 and the decorative part 183 are matched can be deposited in the sol tank 186, avoiding the phenomenon of excess glue overflowing and causing contamination of the appearance surface, which is beneficial to simplifying the cleaning process of the product; at the same time, the sol tank 186 can accommodate more glue, so that the thickness of the adhesive layer in the sol tank 186 is larger, thereby making the connection strength of the decorative part 183 in the sol tank 186 higher, which is beneficial to improving the installation stability of the decorative part 183; at the same time, the adhesive layer in the receiving tank 185 and the adhesive layer in the sol tank 186 are connected, so that the overall strength of the adhesive structure is increased, which is beneficial to improving the installation stability of the decorative part 183.

[0216] In some embodiments, to further enhance the installation stability of decorative member 183, decorative member 183 includes a decorative portion and a mounting portion 791 connected to the decorative portion. The decorative portion is exposed in receiving groove 185, and mounting portion 791 is mounted in receiving groove 185. A gel gap 189 is formed between at least a portion of the outer wall of mounting portion 791 and the wall of receiving groove 185. An adhesive layer is disposed within gel gap 189. In some embodiments, gel gap 189 can also be achieved by: the outer wall of the mounting portion has a first inclined surface 18b, and the wall of receiving groove 185 has a second inclined surface 18a. The inclination of first inclined surface 18b is greater than that of second inclined surface 18a, thereby forming gel gap 189 between first inclined surface 18b and second inclined surface 18a. In some embodiments, to improve the assembly efficiency of the ultrasonic beauty device, the housing 100 includes a housing body 190 and a decorative cover 180. The decorative cover 180 is fixedly mounted on the outer wall of the housing body 190, and a receiving groove 185 and a dissolving groove 186 are formed on the decorative cover 180. 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 housing 110 and protrudes toward the housing body 190. The receiving groove 185 and the dissolving groove 186 are located corresponding to the mounting boss 187. In some embodiments, to improve the compactness of the decorative cover 180, a mounting recess 197 is formed on the housing body 190 corresponding to the mounting boss 187. The mounting boss 187 is inserted into the mounting recess 197, and the facing surfaces of the cover plate 188 and the main housing 110 are in contact (including full or partial contact). In some embodiments, to improve the stability of the installation of the decorative cover 180, a mounting cover groove 196 is formed on the housing body 190 corresponding to the decorative cover 180, and the decorative cover 180 is mounted in the mounting cover groove 196. In some embodiments, to facilitate the removal of the decorative cover 180, the overall shape of the mounting cover groove 196 is U-shaped, with one end of the decorative cover 180 extending out of the mounting cover groove 196 through the U-shaped opening.

[0217] The decorative cover 180 can take many forms, including an integral unit or separate, reassembled components. In this embodiment, the decorative cover 180 comprises an inner cover 182 and an outer cover 181, with the outer cover 181 fitting over the circumference of the inner cover 182. The outer cover 181 is U-shaped, with the end surface of the inner cover 182 exposed through the U-shaped opening. Alternatively, the outer cover 181 and the inner cover 182 may lie on the same plane.

[0218] See Figures 41 to 45Regarding the layout of the drive structure 200 within the housing 100 of the handpiece 10, its form and component division can be in 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 drivingly connected to the transmission assembly 230, and the transmission assembly 230 is connected to the transmission shaft 250. Among them, 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 direction of the transmission rod 231 (the transmission rod 231 rotates relative to the transmission block 232). One end of the transmission shaft 250 is connected to the transmission block 232 , and the other end is used to connect to the transducer assembly 700 in the cutter head 20 . The transmission shaft 250 moves with the movement of the transmission block 232 .

[0219] The following describes the technical solutions related to the driving structure 200 in conjunction with a complete embodiment.

[0220] The present application discloses a handpiece 10 for a skin treatment device, which includes a cutting head 20, in which a transducer assembly 700 is disposed. The handpiece 10 includes: a housing 100, one end of which is used to assemble the cutting head 20; a drive structure 200, which includes a drive assembly 210 and a transmission shaft 250 arranged along the length of the housing 100, and the transmission shaft 250 is used to drive the transducer assembly 700 to move; a drive bracket 300, which includes a mounting frame 310, a support column 330, and a buffer pad 320. The mounting frame 310 is used to mount the drive assembly 210, one end of the support column 330 is fixedly connected to the mounting frame 310, and the other end is fixedly connected to the inner side wall of the housing 100, and the buffer pad 320 is 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. In this embodiment, by suspending the driving assembly 210 and the mounting frame 310 on the support column 330, the vibration generated by the driving assembly 210 and the mounting frame 310 when working will be transmitted to the shell 100 through the support column 330; by arranging the buffer pad 320 at the connection between the mounting frame 310 and the support column 330, the vibration on the mounting frame 310 needs to pass through the buffer pad 320 and then be transmitted to the support column 330; in the process of the 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 potential energy and thermal energy of deformation), which greatly reduces the amount of vibration transmitted from the mounting frame 310 to the support column 330, which is beneficial to reducing the vibration sensation of the shell 100; at the same time, arranging the buffer pad 320 between the bracket and the support column 330 bracket avoids direct contact between the two hard components, can reduce the noise generated by the contact vibration between the hard components, and is beneficial to reducing the noise generated when the handpiece 10 is working.

[0221] In some embodiments, in order to further enhance 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 is provided with mounting holes 325 running through both ends thereof. An assembly hole 311 is provided on the mounting frame 310. 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 frame 310. The buffer arm 323 is located in the assembly hole 311. The end of the support column 330 away from the housing 100 is inserted into the mounting hole 325 and fixedly connected to the mounting frame 310.

[0222] There can be many forms of connection between the support column 330 and the drive bracket 300, which are explained below with examples. In some embodiments, the drive bracket 300 also includes a clamping structure, and one end of the support column 330 that cooperates with the buffer pad 320 is a fastening end 332; the fastening end 332 passes through the mounting hole 325, and the clamping structure is fastened to the fastening end 332 to compress the first buffer portion 321. In 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 compress the first buffer portion 321. In some embodiments, in order to improve the stability of the installation of the buffer pad 320, a support bar 331 is provided on the side wall of the support column 330, and the support bar 331 is used to support the second buffer portion 322. In some embodiments, to improve the stability of the drive structure installation, multiple support columns 330 are provided, distributed on both sides of the drive assembly 210 in the width direction, and a connecting wall 333 is provided between the 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. In some embodiments, the mounting frame 310 includes a mounting plate 312 and suspension arms 313 disposed at both ends of the mounting plate 312. The drive assembly 210 is mounted on the suspension arms 313, and the support columns 330 are fixedly connected to the mounting plate 312.

[0223] 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 respectively rotatably connected to the two suspension arms 313; 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 shell 600 with the movement of the transmission block 232; the drive motor 220 is installed on the side wall of the suspension arm 313 facing away from the transmission rod 231; the output shaft of the drive motor 220 is fixedly connected to the end of the transmission rod 231.

[0224] 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 slot 315 is provided on the mounting plate 312. The guide slot 315 extends along the length of the housing 100, and the guide post 236 is inserted into the guide slot 315, so that the transmission block 232 moves along the direction of the guide slot 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 ends of which are fixedly connected to the two suspension arms 313 respectively; the transmission block 232 is provided with a guide hole 235, through which the guide rod 270 passes; and / or the housing 100 has a head 112 for mounting the cutter head 20, and a guide hole 316 is formed on the suspension arm 313 adjacent to the head 112, through which the transmission shaft 250 passes.

[0225] See Figure 47 and 48 There are many possible forms of drive connection between the handpiece 10 and the cutter head 20. The following is a detailed description of the complete technical solution as an embodiment. A cutter head 20 is used in a skin treatment device. The skin treatment device includes a handpiece 10 provided with a drive structure 200; the cutter head 20 includes: a shell 600, the shell 600 has a mounting cavity 610 and a connecting hole 612, the connecting hole 612 passes through the side wall of the shell 600; a transducer assembly 700, the transducer assembly 700 is movably arranged in the mounting cavity 610; a sealed telescopic tube 810, the sealed telescopic tube 810 has a fixing portion 819, the fixing portion 819 is fixedly connected to the transducer assembly 700; the sealed telescopic tube 810 has a fixing portion 819, and the fixing portion 819 is fixedly connected to the transducer assembly 700; The housing 600 has an open end 811, which is sealed and connected to the connecting hole 612 of the housing 600. A linkage shaft 680 is provided, one end of which extends through the connecting hole 612 and the open end 811 into the sealed telescopic tube 810 and is mounted on the fixed portion 819. The other end of the linkage shaft 680 is used to connect to the drive mechanism 200 via a quick-release structure 880. The housing 600 is detachably mounted on the handpiece 10. The linkage shaft 680 is used to connect the drive mechanism 200 and the transducer assembly 700 to drive the transducer assembly 700. In this embodiment, by configuring the linkage shaft 680 so that one end extends through the connecting hole 612 and the open end 811 into the sealed telescopic tube 810 and is mounted on the fixed portion 819, and the other end is exposed outside the housing 600, the exposed end of the linkage shaft 680 can be quickly installed and removed from the drive mechanism 200 via the quick-release structure 880, thereby achieving rapid installation and removal of the blade head 20 from the handpiece 10, facilitating user operation.

[0226] The present invention also proposes a skin treatment device, which includes a handpiece 10 and a cutter head 20. The specific structures of the handpiece 10 and the cutter head 20 refer to the above embodiments. Since the skin treatment device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0227] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the practical concept of the present invention, or technical solutions combining elements in different embodiments, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A cutter head, characterized in that: For a skin treatment device, the cutter head comprises: A housing having a mounting cavity and a through-hole structure, wherein the through-hole structure passes through a side wall of the housing; a transducer assembly, the transducer assembly being movably disposed in the mounting cavity; a telescopic tube, the telescopic tube being disposed in the mounting cavity, one end of the telescopic tube being an open end, the other end being connected to the transducer assembly, and the open end being in communication with the through-hole structure; a sealed connection structure, the sealed connection structure comprising a pressing member and a fastener connected to the pressing member, wherein at least a portion of the open end is clamped by the pressing member and the fastener so that the clamped portion of the telescopic tube is in sealing contact with the pressing member and / or the fastener; the sealed connection structure cooperates with a side wall of the housing to seal the open end to the housing; The sealing connection structure has an air hole, so that the interior of the telescopic tube is communicated with the outside through the opening of the open end and / or the through-hole structure.

2. The cutter head according to claim 1, wherein: The end of the open end has a sealing flange, the pressing member has the air hole, and one of the pressing member and the fastener is located outside the shell, and the other is located inside the shell; The clamping part includes a first connecting part and a clamping part connected to the first connecting part, the fastener includes a second connecting part and a clamping part connected to the second connecting part, the first connecting part is fastened to the second connecting part through the through-hole structure, and the clamping part and the clamping part clamp the side wall of the shell and the sealing flange.

3. The cutter head according to claim 2, wherein: The air hole passes through the first connecting portion and the pressing portion, the pressing portion is located on one side of the shell side wall, and the first connecting portion extends through the through-hole structure to the other side of the shell side wall. One end of the air hole is connected to the interior of the telescopic tube, and the other end is connected to the outside of the shell.

4. The cutter head according to claim 2, wherein: The pressing portion is located in the telescopic tube, the sealing flange is located between the pressing portion and the inner side wall of the shell, and the clamping portion abuts against the outer side wall of the shell corresponding to the pressing portion; and / or, The first connection portion and the second connection portion are fastened by screw threads.

5. The cutter head according to claim 2, wherein: The pressing portion is located inside the telescopic tube; the open end has a covering portion, which wraps around the edge of the pressing portion, and the covering portion located between the pressing portion and the inner side wall of the shell is the sealing flange.

6. The cutter head according to claim 1, wherein: The end of the open end has a sealing flange, the air hole passes through the pressing member, the pressing member includes a first connecting portion and a pressing portion connected to the first connecting portion, and the fastener includes a second connecting portion and a clamping portion connected to the second connecting portion; The sealing connection structure further includes a connecting member, the connecting member including a third connecting portion and an extension portion connected to the third connecting portion; the third connecting portion is used to be fixedly connected to the side wall of the housing; The first connecting portion is tightly connected to the second connecting portion, the pressing portion and the clamping portion clamp the extension portion and the sealing flange, or the pressing portion and the clamping portion clamp the extension portion, the sealing flange, and the side wall of the shell.

7. The cutter head according to claim 6, wherein: The pressing member, the fastening member, and the connecting member are all located inside the installation cavity or outside the installation cavity; The pressing portion and the clamping portion clamp the sealing flange and the extending portion, and the third connecting portion is fixedly connected to the inner side wall of the shell; The air hole passes through the first connecting portion and the pressing portion, one end of the air hole is connected to the telescopic tube, and the other end is connected to the through-hole structure, so that the telescopic tube is connected to the outside of the shell through the air hole and the through-hole structure.

8. The cutter head according to claim 6, wherein: The pressing portion is located inside the telescopic tube; the open end has a covering portion, the covering portion wraps around the edge of the pressing portion, and the covering portion is located between the pressing portion and the inner side wall of the shell as the sealing flange; and / or, The first connection portion and the second connection portion are fastened by screw threads.

9. The cutter head according to claim 6, wherein: An annular rib is provided on the inner side wall of the installation cavity, the space enclosed by the annular rib is communicated with the air hole, and the fastener is at least partially located in the area enclosed by the annular rib; The extension portion has a receiving space with one side open, the extension portion is covered on the outside of the annular rib, and the first connecting portion extends into the receiving space and is tightly connected to the second connecting portion.

10. The cutter head according to claim 9, wherein: The inner side wall of the receiving space is sealed to the outer side wall of the annular rib; and / or, The side of the extension portion facing away from the telescopic tube is sealed to the inner side wall of the housing.

11. A skin treatment device, characterized in that: It comprises a hand piece and a cutting head as described in any one of claims 1 to 10, wherein the hand piece is detachably connected to the cutting head.

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