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 communicating hole, and the communicating hole penetrates through the side wall of the shell; the transducer assembly is movably arranged in the mounting cavity; the sealing telescopic pipe is provided with a fixing part, and the fixing part is fixedly connected with the transducer assembly; the sealed telescopic pipe is provided with an open end, and the open end and the shell are hermetically connected to the communicating hole; one end of the linkage shaft extends into the sealed telescopic pipe through the communicating hole and the open end and is mounted on the fixing part, and the other end of the linkage shaft is used for being connected with a driving structure through a quick release structure; wherein the shell is detachably installed on the handheld part, and the linkage shaft is used for connecting the driving structure and the transducer assembly so as to drive the transducer assembly to move. According to the technical scheme, the convenience of dismounting and mounting the tool bit is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the cosmetic technical field, especially a tool bit and skin processing device. BACKGROUND

[0002] Ultrasonic nursing is a common nursing means in the medical beauty industry. When the ultrasonic nursing instrument is nursing, the transducer inside the nursing handle forms focused ultrasound, so that the lower layer of the skin forms a nursing point, and the anti-aging and lifting effect is achieved. For example, the ultrasonic nursing instrument exceeds the depth limit of traditional non-surgical equipment, penetrates the SMAS (Superficial Musculo-Aponeurotic System) fascia layer, the ultrasonic energy is gathered at the nursing point, high temperature is generated, the target tissue is shrunk under high temperature, and collagen is stimulated to grow, so that the effects of anti-aging, wrinkle removal, tightening, lifting and contouring are achieved. The energy wave generated by the transducer can directly act on the fascia layer to make the fascia layer shrink.

[0003] The ultrasonic nursing instrument usually includes a hand-held part for hand-holding and a tool bit installed on the hand-held part. In order to increase the action area of the ultrasonic transducer, in the related technology, the transducer is arranged to be movable relative to the shell of the tool bit, and the movement of the transducer is realized by cooperation of the driving mechanism of the hand-held part and the transmission member. At the same time, since the transducer works in a liquid environment, an extension tube needs to be arranged outside the transmission member. Specifically, both ends of the extension tube are open ends, the first open end is sealingly connected at the communication hole of the shell, and the second open end is sealingly connected with a bracket of the transducer, the transducer is installed on the bracket, and the transmission member is connected with the bracket to drive the transducer to move in the shell, so as to increase the action area.

[0004] At the same time, in order to realize different functions, a first magnetic member is arranged on the bracket, and a second magnetic member is arranged on the transmission member, so as to realize the magnetic connection between the first magnetic member and the second magnetic member, drive the transducer to move, and realize the detachable connection between the tool bit and the hand-held part, so as to replace the tool bit to realize different functions. However, it is very inconvenient to install the first magnetic member into the extension tube, which leads to the inconvenience of connection and disconnection between the tool bit and the hand-held part.

[0005] It should be noted that the background is only used to introduce the technical problem, and does not represent the prior art. UTILITY MODEL CONTENT

[0006] The main purpose of the utility model is to provide a tool bit, which aims to improve the convenience of installation and disassembly of the tool bit.

[0007] In order to achieve the above purpose, the tool bit provided by the utility model is used for skin processing device, and the tool bit comprises:

[0008] A shell having a mounting cavity and a communication hole penetrating a side wall of the shell;

[0009] A transducer assembly movably arranged in the mounting cavity;

[0010] A sealed telescopic tube having a fixed part fixedly connected with the transducer assembly; the sealed telescopic tube has an open end sealingly connected with the shell at the communication hole;

[0011] A linkage shaft having one end extending into the sealed telescopic tube through the communication hole and the open end and being installed at the fixed part, and the other end being used for being connected with the driving structure through a quick release structure;

[0012] The shell is detachably mounted at the hand-held piece, and the linkage shaft is used for connecting the driving structure and the transducer assembly to drive the transducer assembly to move.

[0013] The application further provides a skin treatment device comprising a hand-held piece and a cutter head.

[0014] In the technical scheme of the utility model, the linkage shaft is arranged with one end extending into the sealed telescopic tube through the communication hole and the open end and being installed at the fixed part, and the other end being exposed outside the shell, so that the exposed end of the linkage shaft can be quickly mounted and quickly released from the driving structure through the quick release structure, thereby realizing quick mounting and quick release of the cutter head and the hand-held piece, which is beneficial to the operation of the user; in this way, the magnetic part does not need to be installed into the telescopic tube, and the complicated process of installing the magnetic part into the telescopic tube is avoided, which is beneficial to improving the mounting efficiency of the cutter head. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor.

[0016] Figure 1 It is a structural schematic view of an embodiment of the skin treatment device of the utility model;

[0017] Figure 2 It is a structural schematic view of an embodiment of the hand-held piece; Figure 1

[0018] Figure 3 It is a structural schematic view of an embodiment of the skin treatment device of the utility model;​

[0019] Figure 4 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0020] Figure 5 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0021] Figure 6 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0022] Figure 7 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0023] Figure 8 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0024] Figure 9 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0025] Figure 10 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0026] Figure 11 Structure diagram of another embodiment of the skin treatment device of the utility model; Figure 10 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0027] Figure 12 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0028] Figure 13 Structure diagram of another embodiment of the skin treatment device of the utility model; Figure 12 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0029] Figure 14 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0030] Figure 15 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0031] Figure 16 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0032] Figure 17 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0033] Figure 18 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0034] Figure 19 Structure diagram of another embodiment of the skin treatment device of the utility model;

[0035] Figure 20 It is structure schematic view of one embodiment of the driving mechanism in the utility model;

[0036] Figure 21 It is structure schematic view of one embodiment of the swing structure in the utility model;

[0037] Figure 22 It is structure schematic view of one embodiment of the clamping groove in the utility model;

[0038] Figure 23 It is internal structure schematic view of another embodiment of the tool bit in the utility model;

[0039] Figure 24 It is structure schematic view of one embodiment of the packaging film in the utility model; Figure 23 It is the local enlarged structure schematic view of A in the utility model;

[0040] Figure 25 It is the local enlarged structure schematic view of B in the utility model; Figure 23 It is the local enlarged structure schematic view of B in the utility model;

[0041] Figure 26 It is internal structure schematic view of another embodiment of the tool bit in the utility model;

[0042] Figure 27 It is the local enlarged structure schematic view of C in the utility model; Figure 26

[0043] It is the local enlarged structure schematic view of E in the utility model; Figure 28 Figure 26 It is structure schematic view of one embodiment of the packaging film in the utility model;

[0044] Figure 29 It is structure schematic view of one embodiment of the handheld piece in the utility model;

[0045] Figure 30 It is structure schematic view of another embodiment of the handheld piece in the utility model;

[0046] Figure 31 It is structure schematic view of another embodiment of the handheld piece in the utility model;

[0047] Figure 32 It is structure schematic view of another embodiment of the handheld piece in the utility model;

[0048] Figure 33 It is structure schematic view of another embodiment of the handheld piece in the utility model;

[0049] Figure 34 It is structure schematic view of one embodiment of the back shell in the utility model;

[0050] Figure 35 It is internal structure schematic view of another embodiment of the skin treatment device in the utility model;​

[0051] Figure 36 For Figure 35 The local enlarged structure schematic view at F in the middle;

[0052] Figure 37 For Figure 35 The local enlarged structure schematic view at G in the middle;

[0053] Figure 38 For the structure schematic view of another embodiment of the handheld piece in the utility model;

[0054] Figure 39 For Figure 38 The local enlarged structure schematic view at H in the middle;

[0055] Figure 40 For the structure schematic view of an embodiment of the limiting cover plate in the utility model;

[0056] Figure 41 For the internal structure schematic view of an embodiment of the skin treatment device in the utility model;

[0057] Figure 42 For Figure 41 The local enlarged structure schematic view at I in the middle;

[0058] Figure 43 For the structure schematic view of an embodiment of the buffer pad in the utility model;

[0059] Figure 44 For the structure schematic view of an embodiment of the driving structure in the utility model;

[0060] Figure 45 For the structure schematic view of another embodiment of the driving structure in the utility model;

[0061] Figure 46 For the structure schematic view of an embodiment of the main shell in the utility model;

[0062] Figure 47 For the internal structure schematic view of another embodiment of the skin treatment device in the utility model;

[0063] Figure 48 For the internal structure schematic view of another embodiment of the skin treatment device in the utility model.

[0064] The realization, functional characteristics and advantages of the utility model will be further explained by combining with embodiments and referring to the drawings. DETAILED DESCRIPTION

[0065] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0066] The present application mainly proposes a skin treatment device, which is mainly used for nursing and treating the skin of human body, and mainly realizes the cosmetic effect such as beautifying, lifting and wrinkle removing by ultrasonic wave injection into the skin. In the present application, the ultrasonic cosmetic instrument and the ultrasonic nursing instrument are taken as examples. The skin treatment device in the present application has multiple different improvements, such as the driving form and structure of the transducer, the structural design of water pressure fluctuation generated in the movement process of the balanced transducer, and the like, which will be embodied in different embodiments respectively. The following embodiments will specifically introduce the specific structure of the skin treatment device. The skin treatment device usually comprises a handheld part and a physiotherapy head. The handheld part is used for holding when used by people. The physiotherapy head can have multiple forms, such as an ultrasonic head and a light therapy head. The handheld part and the physiotherapy head can be fixedly connected and integrally arranged, or can be detachably arranged in a split mode.

[0067] In order to facilitate understanding of the technical scheme of the present application, the working principle of the important scheme of the present application is simply introduced. The skin treatment device comprises a handheld piece 10 and a cutter head 20. The handheld piece 10 comprises a driving assembly 210, a transmission shaft 250 in transmission connection with the driving assembly 210, and a first magnetic piece 260 arranged at the driving end of the transmission shaft 250. The cutter head 20 comprises a shell 600, a transducer assembly 700 and a sealing connection assembly 800 arranged in the shell 600, and the shell 600 has a sound wave outlet 611 for ultrasonic wave emission. The sealing connection assembly 800 comprises a sealing telescopic pipe 810 and a second magnetic piece 820 fixedly installed in the sealing telescopic pipe 810. The shell 600 is detachably installed on the handheld piece 10. The transmission shaft 250 is used for extending into the sealing telescopic pipe 810 and is used for being magnetically connected with the second magnetic piece 820 through the first magnetic piece 260, so as to drive the transducer assembly 700 to move in a first direction. The cutter head 20 is provided with a driving mechanism 900, which is in transmission connection with the transducer assembly 700. The driving mechanism 900 is used for driving the transducer assembly 700 to move in a second direction. The first direction and the second direction are different directions (in some other embodiments, they can be the same direction). The plane determined by the first direction and the second direction is a path plane, and the path plane is parallel to the sound wave outlet 611, for example, the two are arranged in parallel.

[0068] The working principle of the treatment head will be described below with the ultrasonic head as an example. When the ultrasonic care instrument is in use, the transducer inside the ultrasonic head forms focused ultrasound, which forms a care point in the lower layer of the skin, and plays the role of anti-aging, lifting or wrinkle removal. For example, the ultrasonic care instrument overcomes the depth limitation of traditional non-surgical equipment, penetrates the SMAS (Superficial Musculo-Aponeurotic System) fascia layer, and the ultrasonic energy is concentrated at the care point to generate high temperature, which makes the target tissue shrink under high temperature and stimulates collagen regeneration, thereby playing the role of anti-aging, wrinkle removal, tightening and lifting, and contraction contour. The energy wave generated by the transducer can directly act on the fascia layer to make the fascia layer shrink. In some schemes, in order to adjust the acoustic impedance so that the ultrasonic transducer can work efficiently, the ultrasonic transducer is arranged to work in a liquid environment.

[0069] The specific structure of the skin treatment device will be described below.

[0070] Reference Figures 1 to 6 In the embodiment of the utility model, the skin treatment device comprises a handheld piece 10 and a cutter head 20, and the handheld piece 10 and the cutter head 20 can be fixedly connected as an integrated structure or can be detachably connected as a split structure, and in the embodiment, the handheld piece 10 and the cutter head 20 are detachably connected as an example. The connection mode of the handheld piece 10 and the cutter head 20 can be various, such as buckle connection, fastener connection, screw connection, magnetic adsorption connection, adhesive connection, hot melt welding and the like, and no special limitation is made herein.

[0071] In some embodiments, in order to expand the action area while reducing the frequency of moving the skin treatment device by the user, the transducer in the cutter head 20 is arranged to be movable. The driving mode of the transducer can be various, such as arranging a driving structure 200 (which can be manually driven or automatically driven) on the cutter head 20, or arranging a driving structure 200 in the handheld piece 10 to drive the transducer to move through a transmission member. Of course, in some embodiments, the driving structure 200 can be arranged in the handheld piece 10 and the cutter head 20 at the same time, and the two driving structures 200 can independently drive the transducer to move or can cooperate to drive the transducer to move.

[0072] The structure of the cutter head 20 and the handheld piece 10 will be introduced below respectively.

[0073] Please refer to Figures 4 to 11The tool head 20 includes a housing 600, a transducer assembly 700 (providing an ultrasonic transducer 750 and a transducer support 710) and a sealed connection assembly 800 (providing an environment and connection components for sealed connection with the handpiece 10) disposed in the housing 600, and a packaging film structure 950 (providing a packaging sound wave outlet 611 structure and a skin adhesion detection structure) disposed corresponding to a sound emitting area 21 of the housing 600, etc. In some other embodiments, the tool head 20 can further include a driving mechanism 900 (for driving the ultrasonic transducer 750 to move in the housing 600), a transmission mechanism 920 (for transmitting power of the driving mechanism 900 to the ultrasonic transducer 750 so that the ultrasonic transducer 750 moves), and a hydraulic balance member (for balancing changes in liquid pressure in the housing 600 so as to reduce liquid fluctuation), etc. Of course, in some embodiments, in order to facilitate communication or control, the tool head 20 can further include an electric control board which can be electrically connected with one or more of the transducer assembly 700, the packaging film structure 950, the driving mechanism 900, and the handpiece 10.

[0074] The overall shape of the housing 600 can be various, such as a square (cuboid, rectangular cuboid), a truncated cone, etc., which are not particularly limited here. The housing 600 has a mounting cavity 610, a communication hole 612, and a sound wave outlet 611, and in some embodiments, can further have a vent hole 613. The sound wave outlet 611 is formed on one side of the housing 600 and is used for transmitting sound waves emitted by the ultrasonic transducer 750 from the mounting cavity 610. The sound wave outlet 611 corresponds to the sound emitting area 21, and the packaging film structure 950 is sealedly connected to the sound wave outlet 611 to avoid leakage of liquid in the mounting cavity 610.

[0075] The combination form of the housing 600 can be various, such as a front shell and a rear shell, a left shell and a right shell, an upper shell 650 and a lower shell 660, etc., which are not particularly limited here. Hereinafter, the upper shell 650 and the lower shell 660 are mainly taken as examples for illustration, wherein the sound wave outlet 611 is located on the upper shell 650.

[0076] In order to avoid leakage of liquid from the housing 600, the upper shell 650 and the lower shell 660 are sealedly connected. The sealed connection between the upper shell 650 and the lower shell 660 can be various, such as connection by sealing glue, hot melting, welding, etc.

[0077] In an embodiment, a sealing recess 653 is arranged on one of the upper shell 650 and the lower shell 660, and a sealing protrusion 662 is arranged on the other one, the sealing protrusion 662 being inserted into the sealing recess 653. Optionally, a sealing adhesive layer can also be arranged in the sealing recess 653 to improve the sealing effect of the connection. The position of the sealing connection of the upper shell 650 and the lower shell 660 is in or substantially in the same vertical plane, so as to avoid the phenomenon that the connection position is out of position and the sealing effect is poor.

[0078] The communication hole 612 and the ventilation hole 613 can be arranged on the upper shell 650 or the lower shell 660, and in some embodiments, a part of them can be arranged on the upper shell 650 and a part of them can be arranged on the lower shell 660, which is not specially limited here, and is taken as an example of being arranged on the upper shell 650. In assembly, the components in the shell 600 can be assembled first, and then the upper shell 650 and the lower shell 660 are sealingly connected.

[0079] It is worth noting that in some embodiments, the tool bit 20 also includes a decorative shell 670 covering the outside of the shell 600. The connection mode of the decorative shell 670 and the shell 600 can be various, such as buckle connection, screw fastening connection, adhesive connection, etc., which are not specially limited here.

[0080] In some embodiments, taken as an example of the decorative shell 670 and the shell 600 being connected by buckling, this can facilitate the installation and disassembly of the two. In some other embodiments, in order to improve the sealing of the connection of the decorative shell 670 and the shell 600, and to avoid water, mosquitoes, dust, etc. from entering the space between the two, a sealing adhesive layer can be arranged at the position of the contour boundary of the two to seal the space enclosed by the two.

[0081] In some embodiments, the decorative shell 670 at least covers part of the shell 600, and the ventilation hole 613 is covered by the decorative shell 670, so that the ventilation hole 613 is hidden, to avoid the ventilation hole 613 being directly exposed to the external environment, so as to avoid the moisture, dust, mosquitoes, etc. in the external environment from entering the balance expansion pipe 830. At the same time, after the decorative shell 670 and the shell 600 are matched, a ventilation space is formed at the position of the ventilation hole 613, so that the balance expansion pipe 830 and the ventilation space are communicated, which is conducive to the inhalation and exhalation of the balance expansion pipe 830.

[0082] Regarding the communication hole 612 and the ventilation hole 613, the communication hole 612 and the ventilation hole 613 penetrate the side wall of the shell 600, and are located on the adjacent or opposite side walls of the shell 600, taken as an example that the side walls where the two are located are oppositely arranged, and are adjacent to the side wall where the sound wave outlet 611 is arranged.

[0083] In some embodiments, the communication hole 612 and the ventilation hole 613 are consistent in hole depth direction, and are positionally symmetrical about the transducer assembly 700.​​​​​​

[0084] In some embodiments, the communication hole 612 and the ventilation hole 613 can be coaxially arranged.

[0085] The direction in which the communication hole 612 and the ventilation hole 613 penetrate the side wall can be various. In the present embodiment, the communication hole 612 and the ventilation hole 613 penetrate the side wall in the thickness direction of the side wall of the shell 600, so that the mounting cavity 610 of the shell 600 is in communication with the outside of the shell 600 (when no other components are arranged, the mounting cavity 610 is in communication with the outside of the shell 600; when other components are arranged, the specific object of communication can be determined according to the situation, for example, when a pipe body is arranged in the shell 600, the object of communication of the communication hole 612 and the ventilation hole 613 can be the inside of the pipe body and the outside of the shell 600).

[0086] The shape of the communication hole 612 and the ventilation hole 613 can be various, such as circular, square, triangular, oval, plum blossom, etc., which are not specially limited herein, and the circular shape is taken as an example.

[0087] The order of introducing the internal structure of the tool bit 20 can be various, which is not specially limited herein. It is worth noting that no matter in which order the introduction is made, the mutual combination and action between the parts are not affected, and the combination of the elements (the characteristics of the parts, the connection relationship characteristics, the position relationship characteristics, and the technical solutions) in different embodiments by the person skilled in the art cannot be combined and assembled (except for the combination and assembly that cannot be combined and assembled by the person skilled in the art). When introducing each component, it can be directly and individually introduced, or it can be introduced in a complete embodiment (with a complete embodiment as a background, the role of the component can be better reflected)

[0088] The following is an example of a specific introduction order for illustration. First, the structure related to the communication hole 612 and the ventilation hole 613 is introduced, such as the sealing connection assembly 800 and its connection, the balancing member and its connection, the transducer assembly 700 and its connection, the structure of the driving mechanism 900, etc., and then the structure related to the sound wave outlet 611 is introduced, such as the packaging film structure 950, etc.

[0089] We introduce the sealing connection assembly 800 in a complete embodiment.

[0090] Please refer to Figures 4 to 14In some embodiments, a skin treatment device includes a handpiece 10 and a cutting head 20, wherein the handpiece 10 includes a driving assembly 210, a transmission shaft 250 in driving connection with the driving assembly 210, and a first magnetic member 260 provided at a driving end of the transmission shaft 250. The cutting head 20 includes a housing 600, a transducer assembly 700, and a sealing connection assembly 800, wherein the housing 600 has a mounting cavity 610 and a communication hole 612 passing through a side wall of the housing 600. The transducer assembly 700 is movably arranged in the mounting cavity 610. The sealing connection assembly 800 includes a sealing telescopic tube 810 and a second magnetic member 820 fixedly arranged in the sealing telescopic tube 810. The sealing telescopic tube 810 has a fixed portion 819 corresponding to a position of the second magnetic member 820. The fixed portion 819 is a self-sealing structure and is fixedly connected with the transducer assembly 700. The sealing telescopic tube 810 has an open end 811 in sealing connection with the housing 600 and in communication with the communication hole 612. The housing 600 is detachably arranged in the handpiece 10. The transmission shaft 250 is used to extend into the sealing telescopic tube 810 through the communication hole 612 and the open end 811 and is used to be in magnetic connection with the second magnetic member 820 so as to drive the transducer assembly 700 to move.

[0091] Specifically, in the present embodiment, the sealing connection assembly 800 includes the sealing telescopic tube 810 and the second magnetic member 820 fixedly arranged in the sealing telescopic tube 810. The first magnetic member 260 and the second magnetic member 820 are components having magnetic adsorption capacity (such as a magnet, a magnetic stone, an electromagnet 930, etc.) or components having the ability to be magnetically adsorbed (such as metallic iron or an iron-containing alloy). Based on the mutual adsorption of the first magnetic member 260 and the second magnetic member 820, for example, both the first magnetic member 260 and the second magnetic member 820 are magnets.

[0092] The sealing telescopic tube 810 can have many forms, such as a bellows tube, an elastic tube, etc. The sealing telescopic tube 810 can be stretched and compressed when subjected to external force. Here, no special limitation is made, and the bellows tube is taken as an example.

[0093] The sealing of the sealing telescopic tube 810 refers to sealing and isolating the space in the tube and the mounting cavity to prevent liquid from entering the tube. The fixed portion 819 of the sealing telescopic tube 810 can have many forms, such as a protruding block, a protruding rib, etc. or a tube wall of the sealing telescopic tube 810. The connection manner of the fixed portion 819 and the transducer assembly 700 can be many, such as buckle connection, clamping groove connection, magnetic connection, screw connection, and fastener connection, etc.

[0094] The self-closing structure refers to that the sealing telescopic tube 810 is closed by its own structure at the fixed part 819, such as forming a closed end to set the fixed part or the fixed part is formed in the middle of the sealing telescopic tube 810, at which position the internal space of the sealing telescopic tube 810 and the external environment of the sealing telescopic tube 810 are sealed and isolated, and the water, gas, dust and the like in the external environment cannot enter the sealing telescopic tube 810 through this position. In this way, the liquid in the installation cavity 610 cannot enter the sealing telescopic tube 810 through the position of the fixed part 819 (the sealing telescopic tube 810 is connected with the transducer assembly 700). Without additional sealing structure of the sealing telescopic tube and the transducer assembly, the fixed part is a self-closing structure, which is stable and durable in sealing, thereby improving the use stability of the skin treatment device.

[0095] After the open end 811 of the sealing telescopic tube 810 is communicated with the communication hole 612, that is, the open end of the sealing telescopic tube is sealingly connected at the communication hole of the shell, a communication channel 868 communicating with the inside of the sealing telescopic tube can be formed at the sealing connection position, and the internal space of the sealing telescopic tube 810 can be communicated with the outside of the shell 600 through the communication channel 868. The communication channel 868 refers to a channel for communicating the inside of the telescopic tube and the outside of the shell 600 after the telescopic tube is sealingly connected with the side wall of the shell 600, and the telescopic tube can be the sealing telescopic tube 810 or the balance telescopic tube 830. The communication channel 868 can have various forms, which can be a hole structure or a combination of multiple hole structures, such as the port of the open end 811 and / or the communication hole 612. The transmission shaft 250 can enter the sealing telescopic tube 810 and be connected with the second magnetic part 820 through the communication channel 868 (communication hole 612 and open end 811) from the outside of the shell 600.

[0096] In the embodiment, the open end of the sealing telescopic tube 810 is sealingly connected at the communication hole of the shell 600, so that the shell 600 can be sealed by the sealing telescopic tube 810 to prevent liquid leakage in the shell 600, and a communication passage 868 is formed at the sealing connection position and communicates with the inside of the sealing telescopic tube 810, so that the sealing telescopic tube 810 can be ventilated and the transmission shaft 250 can be inserted into the sealing telescopic tube 810. The part where the sealing telescopic tube 810 is connected with the transducer assembly 700 is set as a fixed part of a self-sealing structure, so that the sealing telescopic tube 810 can be connected with the transducer assembly 700, and no additional sealing structure is needed for the sealing telescopic tube 810 and the transducer assembly 700. The fixed part is a self-sealing structure, which is stable and durable in sealing, so that the use stability of the skin treatment device can be improved. On the other hand, the connection between the sealing telescopic tube 810 and the transducer assembly 700 can be sealed, so that the space in the sealing telescopic tube 810 can be sealed from the mounting cavity and communicate with the external environment, so that the transmission shaft 250 and the second magnetic member 820 are not in contact with the liquid in the shell 600, so that the transmission shaft 250 and the magnet can be prevented from being corroded to affect the service life of the skin treatment device and the liquid leakage problem. The second magnetic member 820 is arranged in the sealing telescopic tube 810 and fixedly connected with the transducer assembly 700 through the fixed part. On the one hand, the transducer assembly 700 can be driven to move through the magnetic connection between the first magnetic member 260 and the second magnetic member 820. On the other hand, the first magnetic member 260 and the second magnetic member 820 can be directly contacted, so that the magnetic adsorption effect can be improved, so that the driving assembly 210 and the transmission shaft 250 can stably and reliably drive the transducer assembly 700 to move. Moreover, the magnetic connection between the first magnetic member 260 and the second magnetic member 820 can facilitate the detachable connection between the cutter head and the shell 600, so as to replace the cutter head to realize different functions.

[0097] In some embodiments, in order to improve the installation stability of the second magnetic member 820, the sealing telescopic tube 810 is formed with a mounting groove 813, and the mounting groove 813 is arranged corresponding to the fixed part 819, that is, the mounting groove 813 is arranged on the inner side of the fixed part 819, and the second magnetic member 820 is installed in the mounting groove 813.

[0098] In specific embodiments, the mounting groove 813 can completely correspond to the inner side of the fixed part 819, or can partially correspond to the inner side of the fixed part 819, as long as the fixed part 819 can correspond to the second magnetic member 820 when the fixed part 819 is connected with the transducer assembly 700.

[0099] There are various working conditions for the form of the sealing telescopic tube 810 and the position of the fixing portion 819, for example, the fixing portion 819 is located at the end of the sealing telescopic tube 810 far from the open end 811, the fixing portion 819 is located at the middle of the sealing telescopic tube 810, the end of the sealing telescopic tube 810 far from the open end 811 is the self-closing end 812, the end of the sealing telescopic tube 810 far from the open end 811 is the end with an opening, and the like, which will be introduced below by way of example.

[0100] In some embodiments, the sealing telescopic tube 810 also has the self-closing end 812, and the fixing portion 819 and the second magnetic member 820 are located at the self-closing end 812. In this embodiment, the end of the sealing telescopic tube 810 far from the open end 811 is the self-closing end 812, and the fixing portion 819 is formed at the self-closing end 812. During the movement of the transducer assembly 700 driving the sealing telescopic tube 810, the entire sealing telescopic tube 810 can be stretched or compressed, so that the utilization rate of the sealing telescopic tube 810 is greatly improved. Moreover, it is beneficial to improve the installation convenience.

[0101] Further, the self-closing end 812 forms the mounting space 814 with one end open, i.e., the mounting space 814 can be formed by the annular groove and the end face, and the second magnetic member 820 is wrapped in the mounting space 814, and the side of the second magnetic member 820 facing away from the opening abuts against the inner side wall (i.e., the inner side face of the end face) of the mounting space 814. By forming the mounting space 814 at the self-closing end 812 to encapsulate the second magnetic member 820 in the sealing telescopic tube 810, the connection stability of the second magnetic member 820 and the sealing telescopic tube 810 is greatly improved. At the same time, by abutting the side of the second magnetic member 820 facing away from the opening against the inner side wall of the mounting space 814, it is beneficial to quickly position the second magnetic member 820 in the sealing telescopic tube 810. It can be understood that when installing the second magnetic member 820 into the sealing telescopic tube 810, the second magnetic member 820 is put into the tube from the open end 811, and then the second magnetic member 820 is moved to the designated position of the sealing telescopic tube 810. Through the arrangement of the mounting space 814, the second magnetic member 820 can be directly pushed to the end of the self-closing end 812, and the inner side wall of the mounting space 814 (the inner side wall opposite to the opening) will abut against and limit the second magnetic member 820. In this way, the second magnetic member 820 can be quickly and accurately installed to the designated position of the sealing telescopic tube 810.

[0102] In some embodiments, the fixed portion 819 can be formed between the two ends of the sealed telescopic tube 810 to form a first telescopic portion 81a and a second telescopic portion 81b on both sides of the fixed portion 819, the first telescopic portion 81a has an open end 811, and the end of the second telescopic portion 81b away from the fixed portion 819 is formed as a self-sealing end 812 connected with the shell 600, or the end of the second telescopic portion 81b away from the fixed portion 819 is sealingly connected with the shell 600. In this embodiment, the fixed portion 819 is located in the middle of the sealed telescopic tube 810, so that after the fixed portion 819 is fixedly connected with the transducer assembly 700, the compression and stretching 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 81b is compressed, and when the first telescopic portion 81a is compressed, the second telescopic portion 81b is stretched.

[0103] The first telescopic portion 81a communicates with the external environment through the open end 811, so that the gaseous state inside it is easily exhausted and inhaled. The second telescopic portion 81b can communicate with the first telescopic portion 81a, or communicate with the outside of the shell 600 through the end away from the first telescopic portion 81a. In this way, the second telescopic tube can also be directly (through the end away from the first telescopic portion 81a) or indirectly (through communication with the first telescopic portion 81a) connected with the outside. Of course, in some embodiments, it is not excluded that both ends of the second telescopic portion 81b are closed.

[0104] It can be understood that in the scheme in which the first telescopic portion 81a and the second telescopic portion 81b are both connected with the outside, during the movement of the transducer assembly driving the sealed telescopic tube, it is beneficial to keep or tend to keep the deformation amounts of the first telescopic portion 81a and the second telescopic portion 81b consistent, thereby reducing the pressure change and oscillation degree of the liquid filled in the shell, thereby on the one hand reducing the risk of damage of the sound transmission membrane 951, and on the other hand reducing the generation of air bubbles to improve the effect of ultrasonic energy transmission.

[0105] It is worth noting that there are various ways for the second telescopic portion 81b to communicate with the outside, which are introduced below. Specifically, when the end of the second telescopic portion 81b away from the fixed portion 819 is formed as a self-sealing end 812 connected with the shell 600, a through hole 821 for communicating the first telescopic portion and the second telescopic portion can be provided on the second magnet, and / or a through hole 821 can be provided on the fixed portion. By providing the through hole 821 on the second magnetic member 820, the first telescopic portion 81a and the second telescopic portion 81b are communicated, so that the second telescopic portion 81b can communicate with the external environment through the first telescopic portion 81a.

[0106] The through hole 821 of the second magnetic member 820 refers to a space penetrating through the second magnetic member 820, which is a general concept of a hole structure and not only refers to a ring-shaped hole, but also can be a partial hole, for example, a notch, etc. The through hole 821 of the second magnetic member 820 is taken as an example of being formed at the edge of the second magnetic member 820, so that the middle part of the second magnetic member 820 is magnetically adsorbed to the first magnetic member 260, and the edge can be fixedly connected to the transducer support 710 through the fixing part 819, and can also be used for gas to pass through.

[0107] Specifically, when the one end of the second telescopic tube away from the fixing part 819 is an open end, the gas vent hole 613 can be formed on the side wall of the shell 600, and the one end of the second telescopic tube away from the fixing part 819 is in sealed communication with the gas vent hole 613, so that the second telescopic tube is in communication with the outside of the shell 600 through the gas vent hole 613.

[0108] 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 where the axis of the communication hole 612 is located. Thus, in the present embodiment, by making the centroid of the second magnetic member 820 adjacent to the straight line where the axis of the communication hole 612 is located, the centroid of the second magnetic member 820 is closer to the centroid of the first magnetic member 260 and the transmission shaft 250 (the first magnetic member 260 and the transmission shaft 250 move along the straight line into the sealed telescopic tube 810 through the communication hole 612), so that the first magnetic member 260 can be very accurately aligned with the second magnetic member 820 when the first magnetic member 260 enters into the sealed telescopic tube 810 along with the transmission shaft 250, so that the first magnetic member 260 and the second magnetic member 820 can be more accurately connected.

[0109] In some embodiments, in order to increase the contact area of the first magnetic member 260 and the second magnetic member 820 as much as possible 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 area of the second magnetic member 820 faces the communication hole 612. Thus, when the first magnetic member 260 enters into the sealed telescopic tube 810 and magnetically adsorbs to the second magnetic member 820, the larger area of the second magnetic member 820 is attached to the first magnetic member 260, which can increase the contact area of the first magnetic member 260 and the magnetic member, thereby improving the magnetic adsorption force between the first magnetic member 260 and the second magnetic member 820.

[0110] 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 communication hole 612, and the second moving direction is arranged obliquely or perpendicularly to the first moving direction; during the movement of the transducer assembly 700 in the first moving direction and / or the second moving direction, the transducer assembly 700 has at least one connection position, and when the transducer assembly 700 is at the connection position, the extension line of the axis of the communication hole 612 passes through the middle region of the second magnetic member 820. Specifically, in the present embodiment, the transducer assembly 700 can be moved as a whole in the second direction, and the moving structure can be various, such as being driven by a motor, being driven by a hydraulic pump, etc. The moving plane 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, the moving plane can also be perpendicular to the sound wave outlet 611. Here, no special limitation is made, and the moving plane is taken as an example of being arranged in parallel to the sound wave outlet 611. Through the arrangement of the connection position, when the first magnetic member 260 enters the sealing expansion pipe 810, it is ensured that the first magnetic member 260 can be accurately and reliably connected with the second magnetic member 820. In this way, the convenience of the connection between the first magnetic member 260 and the second magnetic member 820 is greatly improved.

[0111] Regarding the connection between the second magnetic member 820 and the transducer assembly 700, there can be many ways, which will be specifically described in the following embodiments. In order to more clearly describe the connection mode between the second magnetic member 820 and the transducer assembly 700, the structure of the transducer assembly 700 in some embodiments will be specifically introduced.

[0112] For example, the transducer assembly 700 includes a transducer support 710 and an ultrasonic transducer 750 arranged on the transducer support 710.

[0113] Among them, the form of the transducer support 710 can be various, for example, it can be an independent support, or a combined support of multiple supports, and no special limitation is made here, and the specific introduction will be made in the following embodiments according to different working conditions.

[0114] For example, the transducer support 710 includes a mounting support 716 for fixedly mounting the ultrasonic transducer 750, and an assembly support 717 for cooperating with other components (such as the shell 600, the second magnetic member 820, the driving mechanism 900, etc.). Among them, the assembly support 717 can be an independent support, or a combined support, and no special limitation is made here, and the following takes the assembly support 717 as an example which includes a detachable first support 711 and a second support 712. The transducer assembly 700 will be more specifically described below according to different working conditions combined with specific embodiments.

[0115] In some embodiments, the transducer support 710 is correspondingly provided with a clamping groove 720, and the second magnetic member 820 and the fixing portion 819 are clamped in the clamping groove 720, that is, the fixing portion 819 is at least partially clamped in the clamping groove 720, and the edge portion of the second magnetic member 820 is clamped in the clamping groove 720. In this way, the rigidity of the second magnetic member 820 can be used to realize stable assembly with the clamping groove 720.

[0116] Specifically, the clamping groove 720 can be formed in various ways, for example, it can be formed on a separate transducer support 710 (the transducer support 710 is a one-piece support structure). When the transducer support 710 includes a connected first support 711 and a second support 712, taking the case where the transducer is mounted on the second support 712, the clamping groove 720 is formed on the first support 711; or the clamping groove 720 is formed on the second support 712; or the first support 711 and the second support 712 enclose the clamping groove 720.

[0117] In order to improve the stability of the second magnetic member 820 and the fixing portion 819 clamped in the clamping groove 720, the radial dimension of the portion of the edge portion of the second magnetic member 820 clamped into the clamping groove 720 is 2.1-8 mm; it can be understood that if the value is less than 2 mm, the second magnetic member 820 is easy to be separated from the clamping groove; if the value is greater than 8 mm, it is easy to cause waste and the size of the transducer support 710 needs to be increased.

[0118] Among them, the form of the first support 711 and the second support 712 enclosing the clamping groove 720 can be various, which will be illustrated below.

[0119] In some embodiments, as shown in Figure 22 , the transducer support 710 includes a connected first support 711 and a second support 712, and the transducer is directly or indirectly mounted on the second support 712; the clamping groove 720 includes a first groove portion 721 and a second groove portion 722, the first groove portion 721 is formed on the first support 711, the second groove portion 722 is formed on the second support 712, and the first groove portion 721 and the second groove portion 722 enclose the clamping groove 720.

[0120] In some other embodiments, as shown in Figure 6 , 10 , the transducer support 710 includes a connected first support 711 and a second support 712, and the transducer is mounted on the second support 712; the clamping groove 720 is formed on one of the first support 711 and the second support 712, and the other of the first support 711 and the second support 712 covers the clamping groove opening 723 of the clamping groove 720.

[0121] In some embodiments, the transducer support 710 comprises a first support 711 and a second support 712, the transducer is mounted on the second support 712; the first support 711 has a clamping groove 720, and the first support 711 further comprises a first connecting structure 713 which is arranged adjacent to the clamping groove 720; the second support 712 comprises a second connecting structure 714 and a limiting part 715 connected thereto, the second connecting structure 714 is connected with the first connecting structure 713, and the limiting part 715 is arranged corresponding to the second magnetic member 820, and the limiting part 715 is used to press the part of the sealing telescopic tube 810 on which the second magnetic member 820 is mounted, so as to limit the second magnetic member 820 in the transducer support 710.

[0122] In the embodiment, the first connecting structure 713 and the second connecting structure 714 can be connected in many ways, such as by a fastener, a buckle, etc. The first connecting structure 713 and the second connecting structure 714 can have many forms, such as a plate, a block, a column, etc.

[0123] In some other embodiments, the transducer support 710 comprises a first support 711 and a second support 712, the transducer is mounted on the second support 712; the second support 712 has a clamping groove 720, and the second support 712 further comprises a second connecting structure 714 which is arranged adjacent to the clamping groove 720; the first support 711 comprises a first connecting structure 713 and a limiting part 715, the first connecting structure 713 is connected with the second connecting structure 714, and the limiting part 715 is arranged corresponding to the second magnetic member 820, and the limiting part 715 is used to press the part of the sealing telescopic tube 810 on which the second magnetic member 820 is mounted, so as to limit the second magnetic member 820 in the transducer support 710. The specific manner of the embodiment can refer to the above embodiments, and the difference is that the positions of the limiting part 715 (belonging to the first support 711) and the clamping groove 720 (belonging to the second support 712) are interchanged.

[0124] The clamping groove 720 can have many forms, and the specific structure and form of the clamping groove 720 will be described below. In some embodiments, the transducer support 710 further comprises an avoiding part 725 which is in communication with the clamping groove 720, and the avoiding part 725 is used at least to avoid the sealing telescopic tube 810. The avoiding part 725 can have many forms, and taking an avoiding space 727 (which can be an avoiding notch) as an example, the avoiding notch is in communication with the clamping groove 720 and the outside, so that the parts can enter the clamping groove 720 through the avoiding part 725, or the avoiding space 727 is provided for the parts connected with the clamping groove 720.

[0125] In some embodiments, to improve the stability of the engagement between the second magnetic member 820 and the fixing portion 819, the fixing portion 819 includes a ring-shaped bottom 81c and two ring-shaped side portions 81d connected to two sides of the ring-shaped bottom 81c, the two ring-shaped side portions 81d and the ring-shaped bottom 81c form a mounting groove 813, and the ring-shaped bottom 81c, at least part of the ring-shaped side portions 81d and at least part of the edge of the second magnetic member 820 are clamped in the clamping groove 720.

[0126] In some embodiments, to further improve the stability of the clamping of the fixing portion 819 and the second magnetic member 820 by the clamping groove 720, a support rib 740 is arranged on the inner wall of the clamping groove 720, and the support rib 740 abuts against the circumferential side surface of the fixing portion 819. In some embodiments, to improve the stability of the support of the fixing portion 819 by the support rib 740, a surface of the support rib 740 facing the fixing portion 819 is arranged as a support surface 741, and the overall shape of the support surface 741 is adapted to the shape of the circumferential side surface of the fixing portion 819. At the same time, since the area of the support surface 741 of the support rib 740 is smaller than the area of the groove bottom of the clamping groove 720, under the same pressure, the support rib 740 can provide greater pressure than the groove bottom of the clamping groove 720, so that the fixing portion 819 and the second magnetic member 820 can be more firmly clamped, and the stability is higher.

[0127] In some embodiments, the sealing telescopic tube 810 includes a deformation section 815, a mounting section 817, and a connecting section 816 connecting the deformation section 815 and the mounting section 817, the mounting section 817 forms the fixing portion 819, the 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 deformation section 815 and the mounting section 817, at least part of the mounting section 817 is clamped in the clamping groove 720, at least part of the connecting section 816 is arranged in the avoiding portion 725, and the deformation section 815 is located outside the clamping groove 720. In some embodiments, the transducer assembly 700 further includes a guide rod 730, two ends of the guide rod 730 are connected to the inner wall of the shell 600, the length direction of the guide rod 730 is arranged in the same direction as the hole depth direction of the communication hole 612, and the transducer support 710 is movably mounted on the guide rod 730, so that the transducer assembly 700 is movably arranged in the mounting cavity 610.

[0128] The guiding rod 730 can be mounted to the shell 600 in many ways. For example, the inner side wall of the shell 600 can be provided with a clamping hole 652, and the two ends of the guiding rod 730 are arranged in the clamping hole 652. The clamping hole 652 can be directly formed on the inner side wall of the shell 600, or it can be composed of multiple parts. For example, a clamping groove 651 is formed on the inner side wall of the upper shell 650, and a clamping rib 661 is arranged on the lower shell 660 corresponding to the position of the clamping groove 651. When the clamping rib 661 is inserted into the clamping groove 651 along the length of the clamping groove 651, a clamping hole 652 is formed between the end of the clamping groove 651 and the free end of the clamping rib 661.

[0129] It is worth noting that in other embodiments, the clamping groove 651 can be formed on the lower shell 660, and the clamping rib 661 can be formed on the upper shell 650. The actual working conditions can be used to determine the specific arrangement.

[0130] In some embodiments, in order to improve the stability of the installation of the guiding rod 730, the thickness of the clamping rib 661 is greater than the groove depth of the clamping groove 651. When the clamping rib 661 is inserted into the clamping groove 651, part of the clamping rib 661 is exposed outside the clamping groove 651, so that the area of the clamping rib 661 used to abut against the guiding rod 730 is greatly increased, which is beneficial to improve the stability of the installation of the guiding rod 730. In some embodiments, in order to further increase the installation stability of the guiding rod 730, the end face shape of the free end of the clamping rib 661 is adapted to the outer surface shape of the guiding rod 730, so that the contact area of the clamping rib 661 and the guiding rod 730 can be increased. In some embodiments, in order to increase the connection stability of the clamping rib 661 and the clamping groove 651, a clamping hole is arranged on the groove bottom of the clamping groove 651 (or on the side surface of the clamping rib 661 facing the groove bottom of the clamping groove 651), and a clamping buckle is arranged on the side surface of the clamping rib 661 facing the groove bottom of the clamping groove 651 (or on the groove bottom of the clamping groove 651). When the clamping rib 661 is inserted into the clamping groove 651 to a predetermined position, the clamping buckle and the clamping buckle are engaged, so that the clamping rib 661 and the clamping groove 651 are fixed.

[0131] In some embodiments, in order to improve the load capacity of the shell 600 at the position where the guiding rod 730 is arranged, the installation position of one end of the guiding rod 730 corresponds to the installation box 668 of the control panel 669, and the installation box 668 of the control panel 669 is located outside the shell 600.

[0132] In some embodiments, the sealing telescopic tube 810 also has a self-sealing end 812, and the fixing part 819 and the second magnetic part 820 are located at the self-sealing end 812; the tool bit 20 also includes a balance telescopic tube 830, one end of the balance telescopic tube 830 is connected with the inner side wall of the shell 600, and the other end is connected with the transducer assembly 700 and / or the sealing telescopic tube 810; the sealing telescopic tube 810 and the balance telescopic tube 830 are respectively arranged on two sides of the transducer assembly 700.

[0133] Regarding the balance part, its working principle is that it can be deformed under the driving of the transducer assembly 700, thereby buffering the change of the hydraulic pressure in the mounting cavity 610, and achieving the purpose of reducing the liquid fluctuation. Its form can be various, and can be a deformed tubular structure, such as a deformed telescopic tube. In order to distinguish from the sealing telescopic tube 810, the balance part is referred to as a balance telescopic tube 830 in the following embodiments. The balance telescopic tube 830 can be independently arranged with the sealing telescopic tube 810, or can be integrally arranged with the sealing telescopic tube 810. In the following, different embodiments will be described respectively according to different working conditions.

[0134] Please refer to Figures 5 to 14In some embodiments, in order to better balance the hydraulic changes caused by the movement of the transducer assembly 700, a balance expansion tube 830 is arranged in the housing 600. Specifically, a head 20 is proposed for a skin treatment device, the head 20 comprising: a housing 600, the housing 600 having a mounting cavity 610 and a communication hole 612 passing through the side wall of the housing 600; a transducer assembly 700 movably arranged in the mounting cavity 610; a sealed expansion tube 810 arranged on one side of the transducer assembly 700, the sealed expansion tube 810 having an open end 811 and a fixed end 81e (that is to say, one end of the sealed expansion tube 810 is an open end, and the other end is a fixed end 81e, the form of the fixed end 81e can be many, as long as it is fixedly connected with the transducer assembly 700, in some embodiments, it can correspond to the fixed part 819 in the above embodiment), the open end 811 is sealingly connected to the communication hole 612, so that the inside of the sealed expansion tube 810 communicates with the outside through the open end 811 and / or the communication hole 612, and the fixed end is connected with the transducer assembly 700; a balance expansion tube 830 arranged on the other side of the transducer assembly 700, the balance expansion tube 830 being arranged in the housing 600, the balance expansion tube 830 having a first end 831 and a second end 832, the first end 831 being connected with the inner side wall of the housing 600, and the second end 832 being connected with the transducer assembly 700 and / or the sealed expansion tube 810, the balance expansion tube 830 communicating with the outside of the housing 600; the balance expansion tube 830 is located on the side of the transducer assembly 700 away from the sealed expansion tube 810, so that when one of the sealed expansion tube 810 and the balance expansion tube 830 is compressed, the other is stretched during the movement of the transducer assembly 700.

[0135] It can be understood that in the scheme developed in this part, it is not limited whether the fixed end 81e is necessarily a self-closing end, that is to say, the fixed end 81e can be an open end with an opening, at this time it is sealingly connected to the transducer assembly 700; of course the fixed end 81e can also be a self-closing end 812, at this time only the fixed end 81e is fixedly connected to the transducer assembly 700. It is not limited whether the inner side of the fixed end 81e is provided with a second magnetic member, that is to say, the inner side of the fixed end 81e can be provided with a second magnetic member, at this time the fixed end 81e can form a fixed part corresponding to the second magnetic member, which has basically the same results as the related content in the last part, and will not be described in detail here. The inner side of the fixed end 81e can also not be provided with a second magnetic member, at this time the second magnetic member can be arranged on a bracket outside the fixed end 81e, or other structures can be arranged on the inner side of the fixed end 81e to form a detachable structure such as magic tape, or negative pressure adsorption structure, etc.

[0136] Specifically, the balance telescopic tube 830 can be connected to the outside of the shell 600 in various ways, such as being connected to the outside of the shell 600 through the sealed telescopic tube 810, or being connected to the outside of the shell 600 by being sealed and connected to the air hole 613 on the side wall of the shell 600. Of course, in some embodiments, the first end 831 can also be connected to the outside of the shell 600 through other channels, such as a communication tube.

[0137] Specifically, by arranging the sealed telescopic tube 810 and the balance telescopic tube 830 on opposite sides of the transducer assembly 700, and arranging both the sealed telescopic tube 810 and the balance telescopic tube 830 to be connected to the outside environment, one of the sealed telescopic tube 810 and the balance telescopic tube 830 is compressed and the other is stretched during the movement of the transducer assembly 700. Since both are connected to the outside environment, the pressure difference inside the two is equivalent to the pressure difference in the mounting cavity 610. When the transducer assembly 700 moves a certain distance, the deformation of the two is also equivalent, so that the volume of the liquid in the mounting cavity 610 changes very little (the volume occupied by the compressed telescopic tube decreases, and the volume occupied by the stretched telescopic tube increases, and the volume decrease and volume increase are equivalent), so that during the movement of the transducer assembly 700, violent fluctuations in the liquid are avoided, thereby reducing the pressure change and oscillation of the liquid filled in the shell, thereby reducing the risk of damage to the sound transmission film 951, and on the other hand, reducing the generation of bubbles to improve the effect of ultrasonic energy transmission. In some embodiments, when the fixed end 812 is a self-sealing end, the second end 832 is a self-sealing end, the first end is an open end, and the air hole 613 is formed on the side wall of the shell 600, the first end 831 is sealed and connected to the air hole 613 to realize the connection between the balance telescopic tube 830 and the outside of the shell 600. In some embodiments, in order to further reduce the liquid pressure change caused by the movement of the transducer assembly 700, the sealed telescopic tube 810 and the balance telescopic tube 830 are symmetrically arranged about the transducer assembly 700.

[0138] The specific way in which the balance telescopic tube 830 is connected to the outside environment is described below.

[0139] In some embodiments, in order to improve the convenience of connection and avoid opening a hole in the side wall of the shell 600 again, the balance telescopic tube 830 is connected to the outside through the sealed telescopic tube 810. The way in which the balance telescopic tube 830 is connected to the outside environment can be direct or indirect.

[0140] As to the direct communication, for example, the second end 832 is connected with the fixed end 81e, and the second end 832 is in communication with the fixed end 81e, so that the balance telescopic tube 830 is in communication with the outside of the shell 600 through the sealing telescopic tube 810 and the communication hole 612. At this time, optionally, a second magnetic member and a fixed part can be arranged at the communication between the second end 832 and the fixed end, and the specific structure can be as described above; at this time, optionally, the sealing telescopic tube 810 and the balance telescopic tube 830 can be integrally arranged.

[0141] As to the indirect communication, for example, referring to Figure 8 and Figure 15 , the tool bit 20 further comprises a tube connecting structure 840, the tube connecting structure 840 is hollowly arranged, the tube connecting structure 840 has a connecting channel 841 inside, and the tube connecting structure 840 is connected with the sealing telescopic tube 810 and the balance telescopic tube 830 respectively, and the connecting channel 841 communicates the sealing telescopic tube 810 and the balance telescopic tube 830. Among them, the form of the tube connecting structure 840 can be many, which can be a pipeline, or a hollowly arranged tube connecting structure 840.

[0142] In some embodiments, in order to ensure that the gas in the balance telescopic tube 830 can be directly replaced with the external environment, and obtain a gas closer to room temperature, an air hole 613 is arranged on the side wall of the shell 600, the air hole 613 and the communication hole 612 are arranged on the two sides of the transducer assembly 700 respectively, and the air hole 613 penetrates through the side wall of the shell 600; the first end 831 is open, and the first end 831 is sealingly connected at the air hole 613, so that the inside of the balance telescopic tube 830 is in communication with the outside through the opening of the first end 831 and / or the air hole 613. It is worth noting that the specific form of the balance telescopic tube 830 in communication with the outside of the shell 600 is not limited here for the time being, and the specific form can be referred to the communication channel 868 in the above embodiments.

[0143] In some embodiments, to ensure that the first end 831 of the balance telescopic tube 830 can be reliably sealed and connected to the air vent hole 613, the tool bit 20 further comprises a sealing connection structure 850 for sealingly connecting the end of the balance telescopic tube 830 to the side wall of the shell 600; the sealing connection structure 850 has an air passage hole 854 that communicates the inside of the balance telescopic tube 830 with the outside. A communication channel 868 that communicates the inside of the balance telescopic tube 830 with the outside of the shell 600 is formed at the sealing connection of the sealing connection structure 850. Among them, the form of the communication channel 868 can be many, such as, it can be composed of one part (air passage hole 854 or air vent hole 613), or it can be formed by combining multiple parts (such as air passing through air passage hole 854 and air vent hole 613 in turn). The ratio of the equivalent cross-sectional area value of the communication channel 868 to the length value of the communication channel 868 is 0.6-0.81, which can be 0.69, 0.71, 0.72, 0.75, 0.78, etc. Among them, the length of the communication channel 868 is 3.5mm-6.5mm, and / or the equivalent cross-sectional area of the communication channel 868 is 2.6mm 2 -4.6mm 2 .

[0144] In some embodiments, to further improve the smoothness of gas entering and flowing out of the balance telescopic tube 830. The ratio of the equivalent cross-sectional area of the communication channel 868 to the equivalent cross-sectional area of the balance telescopic tube 830 is 3 / 109-6 / 109; and / or the ratio of the equivalent diameter of the communication channel 868 to the equivalent diameter of the balance telescopic tube 830 is 1 / 10-2 / 5. Of course, the above ratio settings are related to the moving speed of the transducer assembly 700, and it is worth noting that the transducer assembly 700 is used to output ultrasonic waves to the human skin, and its moving speed cannot be extremely fast or extremely slow, and is usually 5mm / s-11mm / s, which can be 6mm / s, 7mm / s, 8mm / s, 9mm / s, 10mm / s. It is worth noting that by setting the air passage hole 854, the stability of the liquid in the mounting cavity 610 is significantly increased. Specifically, during the movement of the transducer assembly 700 along the length direction of the handpiece 10, the ultrasonic film arranged at the position of the sound wave outlet 611 of the shell 600 will rise and sag with the movement of the transducer assembly 700. Under other conditions, before the air passage hole 854 is set, the maximum position difference of the ultrasonic film rising and sagging is 0.3mm-0.5mm; after the air passage hole 854 is set, the maximum position difference of the ultrasonic film rising and sagging is 0mm-0.15mm.

[0145] In some embodiments, in order to improve the sealing effect of the first end 831, the periphery of the opening of the first end 831 is provided with a sealing flange 833, and the tool bit 20 further comprises a sealing connecting structure 850 that seals and clamps the sealing flange 833 to be detachably connected with the housing 600, or the sealing connecting structure 850 clamps the sealing flange 833 between the sealing connecting structure 850 and the housing 600. Optionally, the sealing connecting structure 850 has an air passage hole 854 to enable the interior of the balance telescopic tube 830 to communicate with the outside through the opening of the first end 831 and / or the air vent hole 613. In the present embodiment, the sealing connecting structure 850 clamps the sealing flange 833 and then connects with the housing 600, or the sealing connecting structure 850 directly clamps the sealing flange 833 and the side wall of the housing 600, and makes the sealing flange 833 fit with the side wall of the housing 600. At the same time, the sealing connecting structure 850 also has an air passage hole 854 to enable the balance telescopic tube 830 to communicate with the outside through the opening of the first end 831 and / or the air vent hole 613.

[0146] In some embodiments, in order to improve the sealing connection between the first end 831 of the balance telescopic tube 830 and the housing 600, the sealing flange 833 is provided with a sealing flange 834 on the side surface of the inner side wall of the housing 600, the sealing flange 834 is annularly arranged, and the sealing flange 833 has at least two sealing flanges 834 with different radial sizes, the larger sealing flange 834 is sleeved outside the smaller sealing flange 834, and a sealing groove 835 is formed between the two sealing flanges 834.

[0147] Please refer to Figures 5 to 14 In some embodiments, in order to improve the sealing effect of the sealing telescopic tube 810 and the balance telescopic tube 830, reduce the need for further sealing of the components that have been installed into the installation cavity 610, reduce the process steps of sealing the components installed into the housing 600, and improve the production efficiency of the tool bit 20, the present application further proposes some sealing telescopic tube 810 and balance telescopic tube 830 related structures, and integrates these schemes into specific embodiments for introduction.

[0148] Specifically, the application further provides a cutter head 20 for a skin treatment device, the cutter head 20 comprising: a housing 600, the housing 600 having a mounting cavity 610 and a communication hole 612, the communication hole 612 penetrating through a side wall of the housing 600; a transducer assembly 700 movably arranged in the mounting cavity 610; an integrated telescopic tube, the telescopic tube comprising a sealed telescopic tube 810 and a balanced telescopic tube 830 connected with the sealed telescopic tube 810, the telescopic tube being fixedly connected with the transducer assembly 700 at a connection position of the sealed telescopic tube 810 and the balanced telescopic tube 830, the sealed telescopic tube 810 and the balanced telescopic tube 830 being in communication or forming a self-sealing structure at the connection position; the sealed telescopic tube 810 and the balanced telescopic tube 830 being respectively located on two sides of the transducer assembly 700, an open end 811 of the sealed telescopic tube 810 away from the connection position, the open end 811 being sealingly connected with the housing 600, the open end 811 being in communication with the communication hole 612, and an end of the balanced telescopic tube 830 away from the connection position being connected with an inner side wall of the housing 600; the transducer assembly 700 being configured to drive the telescopic tube to move, and during the movement of the transducer assembly 700, when one of the sealed telescopic tube 810 and the balanced telescopic tube 830 is compressed, the other one is stretched.

[0149] In the embodiment, by arranging the integrated telescopic tube 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, so that 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 an integrated structure, the telescopic tubes do not need to be sealed additionally, which reduces the complex sealing process and is conducive to improving the assembly efficiency of the cutter head 20 and thus improving the production efficiency.

[0150] In some embodiments, in order to improve the sealing effect of the telescopic tube, the telescopic tube further comprises a connecting structure integrally arranged with the sealed telescopic tube 810 and the balanced telescopic tube 830, one end of the connecting structure being connected with the sealed telescopic tube 810 and the other end being connected with the balanced telescopic tube 830. In some embodiments, in order to improve the flexibility of the assembly of the internal structure of the cutter head 20, improve the compactness of the assembled structure, and improve the utilization rate of the space in the mounting cavity 610, the connecting structure has a clearance 842, the transducer assembly 700 comprises a transducer support 710 and an ultrasonic transducer 750 arranged on the transducer support 710; the clearance 842 is configured to allow at least part of the transducer support 710 to pass through.

[0151] The specific form of the escape opening 842 can be various, such as opening the escape opening 842 on a sheet or plate structure, or enclosing the escape opening 842 by multiple strip structures, which will be specifically described below. The connecting structure includes a first connecting arm 843 and a second connecting arm 844, the two ends of the first connecting arm 843 are connected to the sealing telescopic pipe 810 and the balance telescopic pipe 830 respectively, and the two ends of the second connecting arm 844 are connected to the sealing telescopic pipe 810 and the balance telescopic pipe 830 respectively; the first connecting arm 843 and the second connecting arm 844 are arranged at intervals, and the sealing telescopic pipe 810, the first connecting arm 843, the balance telescopic pipe 830 and the second connecting arm 844 enclose the escape opening 842. In some embodiments, in order to increase the opening range of the escape opening 842, the first connecting arm 843 has a first escape portion 845, which is bent away from the second connecting arm 844; and / or, the second connecting arm 844 has a second escape portion 725, which is bent away from the first connecting arm 843. In some embodiments, in order to improve the compactness and stability of the structure, the end of the sealing telescopic pipe 810 away from the communication hole 612 is a self-closed end 812, and the connecting structure is connected to the self-closed end 812; and / or, the end of the balance telescopic pipe 830 adjacent to the sealing telescopic pipe 810 is a self-closed end 836, and the connecting structure is connected to the self-closed end 836. In some embodiments, in order to improve the connection strength of the connecting structure connecting the sealing telescopic pipe 810 and the balance telescopic pipe 830, the connecting structure includes a first connecting arm 843 and a second connecting arm 844, the two ends of the first connecting arm 843 and the second connecting arm 844 are connected to the sealing telescopic pipe 810 and the balance telescopic pipe 830 respectively; the end of the sealing telescopic pipe 810 away from the communication hole 612 is a closed end, and the end face of the closed end is provided with a first boss 818, and the ends of the first connecting arm 843 and the second connecting arm 844 away from the balance telescopic pipe 830 are connected to the two ends of the first boss 818 respectively; and / or, the end of the balance telescopic pipe 830 adjacent to the sealing telescopic pipe 810 is a closed end, and the end face of the closed end is provided with a second boss 837, and the ends of the first connecting arm 843 and the second connecting arm 844 away from the sealing telescopic pipe 810 are connected to the two ends of the second boss 837 respectively.

[0152] In some embodiments, to further improve the stability of the telescopic tube movement, the sum of the lengths of the connecting structure and the balancing telescopic tube 830 is equivalent to the length of the sealing telescopic tube 810 in the natural state. In some embodiments, the sealing telescopic tube 810 and the balancing telescopic tube 830 are separated, and this concept is incorporated into specific embodiments. A tool bit 20 for a skin treatment device, the tool bit 20 comprising: a housing 600 having a mounting cavity 610 and a connecting site; a transducer assembly 700 movably arranged in the mounting cavity 610; the connecting site is located on one side of the movable direction of the transducer assembly 700; a telescopic tube having an open end 811 and a closed end, the open end 811 being connected with the connecting site, and the closed end being fixedly connected with the transducer assembly 700, the transducer assembly 700 being used to drive the telescopic tube to move

[0153] Please refer to Figures 15 to 17 , and Figures 23 to 28 , regarding the sealing connecting structure 850, mainly used for sealing connection of the sealing telescopic tube 810 and the balancing telescopic tube 830, the form of the sealing connecting structure 850 can be many, and simple description is given in the above embodiments. The following will be described in combination with specific embodiments.

[0154] A tool bit 20 for a skin treatment device, the tool bit 20 comprising: a housing 600 having a mounting cavity 610 and a through-hole structure 862 penetrating the side wall of the housing 600; a transducer assembly 700 movably arranged in the mounting cavity 610; a telescopic tube arranged in the mounting cavity 610, one end of the telescopic tube being an open end 861, the other end being connected with the transducer assembly 700, the open end 861 being in communication with the through-hole structure 862; a sealing connecting structure 850 comprising a pressing member 851 and a fastener 852 connected with the pressing member 851, at least part of the open end 861 being clamped by the pressing member 851 and the fastener 852, so that the clamped part of the telescopic tube is sealingly fitted with the pressing member 851 and / or the fastener 852; the sealing connecting structure 850 and the side wall of the housing 600 cooperate to sealingly connect the open end 861 to the housing 600; the sealing connecting structure 850 has an air passage hole 854 to enable the inside of the telescopic tube to communicate with the outside through the opening of the open end 861 and / or the through-hole structure 862.

[0155] In this embodiment, by setting the sealing connection structure 850 to include the pressing member 851 and the fastener 852, and clamping at least part of the open end 861 through the pressing member 851 and the fastener 852, while cooperating with the shell 600 through the sealing connection structure 850, the open end 861 is sealed and fitted with the pressing member 851 and / or the fastener 852, so that the open end 861 is sealed, preventing liquid from entering the flexible tube from the open end 861; at the same time, the sealing connection structure 850 cooperates with the shell 600, so that the sealing connection structure 850 is sealingly connected with the shell 600, so that liquid cannot enter the flexible tube through the sealing connection structure 850; at the same time, by setting the air passage hole 854, the inside of the flexible tube can be communicated with the outside of the shell 600 through the air passage hole 854 and / or the air vent hole 613, in this way, both the sealing connection of the open end 861 of the flexible tube and the communication between the flexible tube and the outside of the shell 600 for inhaling and exhaling are achieved.

[0156] There are many clamping forms of the sealing connection structure 850, which are divided into two categories as follows, the first category, the sealing connection structure 850 not only clamps the flexible tube, but also clamps the side wall of the shell 600, and is connected with the shell 600 through the clamping mode. At this time, 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. The second category, the sealing connection structure 850 clamps the flexible tube and the connecting member 853, and is connected with the shell 600 through the connecting member 853. At this time, part or all of the pressing member 851, the fastener 852 and the connecting member 853 are located inside the shell 600, and the remaining part is located outside the shell 600, which includes the case of being located entirely inside the shell 600 and the case of being located entirely outside the shell 600. The following will be described by examples.

[0157] In some embodiments, the end of the open end 861 has a sealing flange 833, the compression member 851 has a gas passage hole 854, one of the compression member 851 and the fastener 852 is located outside the shell 600, and the other is located inside the shell 600; the compression member 851 comprises a first connecting part 855 and a compression part 856 connected with the first connecting part 855, the fastener 852 comprises a second connecting part 857 and a clamping part 858 connected with the second connecting part 857, the first connecting part 855 is fastened and connected with the second connecting part 857 through the through-hole structure 862, and the compression part 856 and the clamping part 858 clamp the side wall of the shell 600 and the sealing flange 833. The first connecting part 855 is in the shape of a rod, the compression part 856 is in the shape of a sheet or a block, one end of the first connecting part 855 is connected with one side of the compression part 856, and the other end is provided with external threads. The second connecting part 857 is a hole structure matched with the first connecting part 855, and the hole structure is provided with internal threads inside. The external threads and the internal threads are matched. The clamping part 858 is located on the circumferential side of the hole structure. When the first connecting part 855 is threadedly connected with the second connecting part 857, a clamping space is formed between the compression part 856 and the clamping part 858.

[0158] In some embodiments, in order to improve the smoothness of the gas entering and flowing out of the telescopic tube, the gas passage hole 854 penetrates the first connecting part 855 and the compression part 856, the compression part 856 is located on one side of the side wall of the shell 600, the first connecting part 855 extends to the other side of the side wall of the shell 600 through the through-hole structure 862, one end of the gas passage hole 854 communicates with the inside of the telescopic tube, and the other end communicates with the outside of the shell 600.

[0159] In some embodiments, in order to improve the connection stability of the compression member 851 and the telescopic tube, the compression part 856 is located inside the telescopic tube; the open end 861 has a covering part 863, the covering part 863 wraps the edge of the compression part 856, and the covering part 863 is located between the compression part 856 and the inner side wall of the shell 600 as the sealing flange 833.

[0160] Regarding the second case, in some embodiments, the sealing connection structure 850 further comprises a connecting piece 853. In a specific working condition, the end of the open end 861 of the telescopic tube has a sealing flange 833, the air passage hole 854 penetrates the compression piece 851, the compression piece 851 comprises a first connecting part 855 and a compression part 856 connected with the first connecting part 855, the fastener 852 comprises a second connecting part 857 and a clamping part 858 connected with the second connecting part 857. The sealing connection structure 850 further comprises a connecting piece 853, the connecting piece 853 comprises a third connecting part 859 and an extension part 85a connected with the third connecting part 859; the third connecting part 859 is used for fixedly connecting with the side wall of the shell 600; the first connecting part 855 is tightly connected with the second connecting part 857, and the compression part 856 and the clamping part 858 clamp the extension part 85a and the sealing flange 833, or the compression part 856 and the clamping part 858 clamp the extension part 85a, the sealing flange 833, and the side wall of the shell 600.

[0161] The compression piece 851, the fastener 852, and the connecting piece 853 are all located in the mounting cavity 610 or all located outside the mounting cavity 610; the compression part 856 and the clamping part 858 clamp the sealing flange 833 and the extension part 85a, and the third connecting part 859 is fixedly connected with the inner side wall of the shell 600; the air passage hole 854 penetrates the first connecting part 855 and the compression part 856, one end of the air passage hole 854 communicates with the telescopic tube, and the other end communicates with the through-hole structure 862, so that the telescopic tube communicates with the outside of the shell 600 through the air passage hole 854 and the through-hole structure 862.

[0162] In some embodiments, in order to further improve the sealing connection effect of the sealing connection structure 850 and the side wall of the shell 600, an annular convex rib 654 is arranged on the inner side wall of the mounting cavity 610, a space surrounded by the annular convex rib 654 communicates with the air passage hole 854, and the fastener 852 is at least partially located in the area surrounded by the annular convex rib 654; the extension part 85a has an accommodation space 85b with one side open, the extension part 85a is covered outside the annular convex rib 654, and the first connecting part 855 extends into the accommodation space 85b and is tightly connected with the second connecting part 857. In some embodiments, in order to further improve the sealing effect, the inner side wall of the accommodation space 85b is sealingly connected with the outer side wall of the annular convex rib 654; and / or, the side of the extension part 85a opposite to the telescopic tube is sealingly connected with the inner side wall of the shell 600.

[0163] Please refer to Figures 18 to 22There are various forms of the driving mechanism 900 for driving the transducer assembly 700 to move, such as being driven by a motor, being driven by an electromagnet 930, etc., which will be described in the following embodiments. It is worth mentioning that the driving mechanism 900 here refers to the driving mechanism 900 arranged in the housing 600, which can be used to drive the transducer assembly 700 to move along the width direction of the knife head 20. For details, please refer to Figure 3 The length direction, width direction and height direction of the housing 600 are perpendicular to each other, the height direction is consistent with the opening direction of the sound wave outlet 611, and the plane determined by the length direction and the width direction is parallel to the sound wave outlet 611. It is worth mentioning that the skin treatment device with the knife head 20 can only have the driving mechanism 900 in the housing 600, or can also have a driving assembly 210 for driving the transducer assembly 700 to move along the length direction of the skin treatment device. The driving assembly 210 can be located in the housing 600 or in the shell 100 of the handpiece 10, and the following embodiments will take the driving assembly 210 located in the handpiece 10 as an example for description.

[0164] The specific form and working principle of the driving mechanism 900 will be described in combination with the complete embodiments.

[0165] A skin treatment device, the skin treatment device comprising a handpiece 10 and a knife head 20, the knife head 20 being connected to one end of the handpiece 10; the knife head 20 comprising a housing 600, and a transducer assembly 700 and a driving mechanism 900 arranged in the housing 600, the housing 600 having a sound wave outlet 611, and the transducer assembly 700 being arranged corresponding to the sound wave outlet 611; the handpiece 10 comprising a driving assembly 210 and a transmission shaft 250 in transmission connection with the driving assembly 210, the driving end of the transmission shaft 250 being used to connect with the transducer assembly 700; the driving assembly 210 drives the transducer assembly 700 to move along a first direction through the transmission shaft 250, and the driving mechanism 900 drives the transducer assembly 700 to move along a second direction, the first direction and the second direction being arranged intersectingly to determine a path plane; the path plane is arranged parallel to the sound wave outlet 611, so that the distance between the transducer assembly 700 and the sound wave outlet 611 is basically consistent when the transducer assembly 700 moves in the path plane.

[0166] In the embodiment, by arranging the driving mechanism 900 in the shell 600, the distance between the driving mechanism 900 and the transducer assembly 700 is reduced, thereby reducing the transmission distance and energy loss, which is conducive to improving the transmission efficiency and the transmission precision (short transmission distance, faster transmission speed, and smaller transmission error), so as to realize the precise adjustment of the movement of the transducer assembly 700 by the driving mechanism 900. At the same time, by arranging the driving mechanism 900 and the transducer assembly 700 in the shell 600, the modularity of the driving mechanism 900 and the transducer assembly 700 can be realized, and the two can be assembled and then installed in the shell 600, which improves the assembly efficiency of the tool bit 20. At the same time, the movement in the first direction and the movement in the second direction are realized by the driving assembly 210 and the driving mechanism 900 respectively, and the movement control in the two directions is independent of each other and can be performed simultaneously, which is conducive to improving the efficiency of the adjustment. In addition, by arranging the transducer assembly 700 to move in the path plane, the distance between the transducer assembly 700 and the sound wave outlet 611 is basically consistent, so that the distance between the transducer assembly 700 and the human skin remains basically consistent during the movement, thereby making the action depth of the ultrasonic waves emitted by the ultrasonic transducer 750 on the skin basically consistent, which is conducive to improving the uniformity of the skin treatment device in skin physiotherapy. In some embodiments, in order to better drive the movement of the ultrasonic transducer 750, 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 mounted on the mounting bracket 716, the mounting bracket 716 is movably connected with the assembly bracket 717, the transmission shaft 250 and the driving motor 910 are fixedly connected with the assembly bracket 717, and the transmission mechanism 920 is in transmission connection with the mounting bracket 716.

[0167] In the embodiment, the sliding groove 71c is arranged on one of the mounting bracket 716 and the assembly bracket 717, and the sliding rail 71d is arranged on the other one. The sliding rail 71d is inserted into the sliding groove 71c, so that the sliding rail 71d can slide along the sliding groove 71c, thereby enabling the mounting bracket 716 to slide relative to the assembly bracket 717. In the embodiment, the transmission mechanism 920 includes a transmission gear 921 and a transmission rack 922. The transmission rack 922 is arranged on one side of the mounting bracket 716. The driving motor 910 has a driving shaft 913. The free end of the driving shaft 913 is a driving end. The transmission gear 921 is fixedly connected with the driving end of the driving shaft 913 and is engaged with the transmission rack 922. In some embodiments, in order to ensure stable engagement of the transmission gear 921 and the transmission rack 922 and to avoid outward swing of the driving shaft 913 during operation, a limiting hole 71e is arranged on the assembly bracket 717. The limiting hole 71e is arranged adjacent to the transmission rack 922. The driving shaft 913 of the driving motor 910 penetrates through the limiting hole 71e, so as to define a movement region of the driving shaft 913, thereby enabling the transmission gear 921 to engage with the transmission rack 922.

[0168] Regarding formation of the limiting hole 71e, in some embodiments, the assembly bracket 717 includes a bracket body and a limiting piece 71f. The limiting piece 71f is detachably connected with the bracket body. The limiting piece 71f and the bracket body enclose the limiting hole 71e. Alternatively, the limiting hole 71e is formed on the limiting piece 71f. Alternatively, the limiting hole 71e is formed on the bracket body. In some other embodiments, in order to improve operation stability of the driving shaft 913 and to improve load bearing capacity of the driving shaft 913, a limiting bearing is sleeved on the driving shaft 913 of the driving motor 910. The limiting bearing is mounted on the assembly bracket 717. In some embodiments, in order to reasonably utilize the space of the housing 600 and to improve compactness of the internal structure of the tool bit 20, a sealing telescopic pipe 810, a balance telescopic pipe 830, and a connecting structure connecting the sealing telescopic pipe 810 and the balance telescopic pipe 830 are further arranged in the tool bit 20. The connecting structure has an avoiding opening 842. The driving shaft 913 extends through the avoiding opening 842 to one side of the mounting bracket 716.

[0169] In some embodiments, the assembly bracket 717 includes a first bracket 711 and a second bracket 712. The driving motor 910 is mounted on the first bracket 711. The mounting bracket 716 is movably connected with the second bracket 712. The first bracket 711 and the second bracket 712 are detachably connected. In some embodiments, in order to further improve compactness of the structure, the first bracket 711 and the second bracket 712 enclose a communication space. A telescopic pipe is further arranged in the tool bit 20. One end of the telescopic pipe is connected with an inner side wall of the housing 600. The other end of the telescopic pipe penetrates through the communication space and is connected with another inner side wall of the housing 600.

[0170] The communication space can be formed in various ways, which will be described below. The first support 711 includes a base 71a, and a first support table and a second support table disposed on the base 71a, the first support table and the second support table being spaced apart; the two ends of the second support 712 are respectively connected to the ends of the first support table and the second support table away from the base 71a, so that the base 71a, the second support 712, and the first support table and the second support table form a communication space. In some embodiments, in order to improve the connection stability of the first support 711 and the second support 712, a support structure is further provided between the first support table and the second support table, one end of the support structure is fixedly connected with the base 71a, and the other end extends to the bottom of the second support 712 and abuts against the bottom of the second support 712.

[0171] Please refer to Figures 10 to 14 In some embodiments, in order to further improve the space utilization and the compactness of the components in the shell 600 of the tool head 20, the shell part of the driving motor 910 is integrally formed with part of the support of the transducer assembly 700. The above concept will be described below in the complete technical solution.

[0172] The application further provides a tool head 20 for a skin treatment device, the tool head 20 comprising: a shell 600 having a mounting cavity 610; a transducer assembly 700 comprising an assembly support 717 and a transducer structure; the assembly support 717 comprising a first support 711 and a second support 712 connected together, and the transducer structure being movably disposed on the second support 712; a driving mechanism 900 comprising a driving motor 910 and a transmission mechanism 920, the transmission mechanism 920 being in transmission connection with the transducer structure and the driving motor 910, so that the transducer structure can move in the mounting cavity 610 under the action of the transmission mechanism 920; the driving motor 910 comprising a first shell part 911 and a second shell part 912 connected together in a sealed manner, and the first shell part 911 being integrally formed with the first support 711.

[0173] In the embodiment, by integrally forming the first support 711 of the transducer assembly 700 with the first shell part 911 of the driving motor 910, the process step of mounting the driving motor 910 to the first support 711 is omitted, and the assembly process is greatly simplified; at the same time, the connection strength of the driving motor 910 and the assembly support 717 is increased, which is beneficial to improve the mounting stability; by integrally forming the first support 711 with the first shell part 911, the connecting components connecting the two are omitted, and the space for mounting these connecting components is also saved, so that the connection of the driving motor 910 and the assembly support 717 is more compact, and the space utilization is higher.

[0174] The first support 711 includes a base 71a and a first connecting structure 713 arranged on the base 71a, and the second support 712 has a second connecting structure 714. The first connecting structure 713 and the second connecting structure 714 are connected, and the base 71a is sealingly connected with the second shell part 912.

[0175] There are many ways for the sealing connection between the base 71a and the second shell part 912, which are exemplified as follows. One of the base 71a and the second shell part 912 is provided with a sealing groove 914, and the other is provided with a sealing rib 915 which is inserted into the sealing groove 914. In order to further improve the sealing connection effect of the base 71a and the second shell part 912, sealing glue can be arranged in the sealing groove 914 to fill the gap between the sealing rib 915 and the sealing groove 914, and one-step sealing is achieved. In the space enclosed by the first shell part 911 and the second shell part 912, a rotor of a motor, a stator and other structures are arranged. One end of the drive shaft 913 of the drive motor 910 is fixedly connected with the rotor, and the other end extends out of the motor from the base 71a. The base 71a is provided with a shaft hole through which the drive shaft 913 of the drive motor 910 passes, and a sealing ring groove 916 is formed on the inner side wall of the shaft hole. In this way, the drive shaft 913 is sealed in the shaft hole. In some embodiments, in order to further improve the sealing effect of the drive shaft 913 in the shaft hole, the number of sealing ring grooves 916 is multiple, and the multiple sealing ring grooves 916 are arranged in the hole depth direction of the shaft hole at intervals; and / or, sealing oil is arranged in the sealing ring groove 916. In some embodiments, in order to further improve the sealing effect of the drive motor 910, a wire passing hole is arranged on the first shell part 911 or the second shell part 912, and the wire of the drive motor 910 passes out of the wire passing hole; and a sealing glue structure is arranged in the wire passing hole.

[0176] Please refer to Figures 18 to 25 , the principle of driving the drive mechanism 900 by using the electromagnet 930 will be described below in combination with the complete embodiment.

[0177] A cutter head 20 for a skin treatment device, the cutter head 20 comprising: a housing 600, the housing 600 having a mounting cavity 610; a driving mechanism 900, the driving mechanism 900 comprising at least one electromagnet 930 and at least one magnetic body 931; a transducer assembly 700, the transducer assembly 700 comprising a base support 760, a swing structure 770 and an ultrasonic transducer 750; a portion between two ends of the swing structure 770 is rotationally connected with the base support 760, one end of the swing structure 770 is connected with 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 arranged on the base support 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 repelled, the ultrasonic transducer 750 is moved in the mounting cavity 610 under the driving of the swing structure 770.

[0178] In the embodiment, the swing structure 770 is rotationally mounted on the base support 760, and the ultrasonic transducer 750 is arranged at one end of the swing structure 770, and one of the electromagnet 930 and the magnetic body 931 is arranged at the other end, and the other of the electromagnet 930 and the magnetic body 931 is fixedly arranged on the base support 760. When the ultrasonic transducer 750 does not need to move, the electromagnet 930 is powered off (the electromagnet 930 and the magnetic body 931 do not magnetically attract or repel, or are stably magnetically attracted together), and when the ultrasonic transducer 750 needs to move, the electromagnet 930 is powered on to cause the electromagnet 930 and the magnetic body 931 to magnetically attract or repel each other to move the input end of the swing structure 770, thereby achieving the purpose of moving the ultrasonic transducer 750. In the embodiment, the electromagnet 930 and the magnetic body 931 are used to move the ultrasonic transducer 750, which greatly simplifies the driving mechanism 900 compared with using a driving motor 910, an air pump, a hydraulic pump and the like, and greatly reduces the cost of driving the ultrasonic transducer 750 and the production cost of the cutter head 20.

[0179] 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 illustrated below.

[0180] In the case of adding the electromagnet 930, the electromagnet 930 includes the first electromagnet 932 and the second electromagnet 933, the magnetic body 931 is connected to the end of the swing structure 770 away from the transducer, the first electromagnet 932 and the second electromagnet 933 are respectively located on the opposite sides of the magnetic body 931, or the first electromagnet 932 is connected to the end of the swing structure 770 away from the transducer, the second electromagnet 933 and the magnetic body 931 are respectively located on the opposite sides of the first electromagnet 932. In the case of adding the magnetic body 931, the number of the magnetic body 931 is two, the electromagnet 930 is connected to the end of the swing structure 770 away from the transducer, the two magnetic bodies 931 are respectively located on the opposite sides of the electromagnet 930, and the two magnetic bodies 931 have the same magnetic pole facing the end of the electromagnet 930.

[0181] In some embodiments, in order to improve the convenience of installing the magnetic body 931 or the electromagnet 930. The base support 760 includes the body support 761 and the mounting lug 762, the mounting lug 762 protrudes away from the ultrasonic transducer 750, and the magnetic body 931 or the electromagnet 930 is installed on the mounting lug 762. The number of the mounting lug 762 is two, and the two mounting lugs 762 are respectively located on the opposite sides of the swing structure 770. The swing structure 770 and the base support 760 can be connected in many ways, which will be illustrated below. In some embodiments, one of the base support 760 and the swing structure 770 is provided with a rotating shaft 763, and the other is provided with a rotating hole 771, the rotating shaft 763 is inserted into the rotating hole 771, so that the swing structure 770 and the base support 760 are connected.

[0182] In some embodiments, in order to improve the stability of the matching of the rotating shaft 763 and the rotating hole 771, the free end of the rotating shaft 763 penetrates through the rotating hole 771 and is exposed; the tool bit 20 further comprises a clamping part 780, the radial dimension of the clamping part 780 is greater than the radial dimension of the rotating hole 771, and the clamping part 780 is clamped with the free end of the rotating shaft 763. In some embodiments, in order to avoid that the swing range of the swing structure 770 is too large and improve the stability of the swing of the swing structure 770, the rotating shaft 763 is arranged on the base support 760, the swing mechanism has a rotating part 772, and the rotating part 772 has the rotating hole 771; the outer side wall of the rotating part 772 is provided with an abutting part 773, and the base support 760 is provided with a stop part 765 adjacent to the rotating part 772, and the stop part 765 is used for abutting against the abutting part 773 to prevent the rotating part 772 from continuing to rotate in the process of rotating the rotating part 772. In some embodiments, in order to improve the continuity of the swing, the transducer assembly 700 further comprises a reset part 790, the reset part 790 comprises an assembly part 791 and first and second elastic arms 792 and 793 connected with both ends of the assembly part 791, the assembly part 791 is sleeved at the connection between the swing structure 770 and the base support, the first elastic arm 792 is connected with one end of the swing mechanism close to the ultrasonic transducer 750, and the second elastic arm 793 is connected with the base support 760.

[0183] In some embodiments, the base support 760 is provided with the rotating shaft 763, the swing mechanism has the rotating part 772, the rotating part 772 has the rotating hole 771, the rotating shaft 763 is inserted into the rotating hole 771, so that the swing structure 770 is rotationally connected with the base support 760; the rotating part 772 has an assembly column 775, the assembly part 791 is sleeved on the assembly column 775, and the rotating hole 771 and the assembly column 775 are coaxially arranged. The rotating hole 771 is formed on the assembly column 775 and penetrates along the length direction of the assembly column 775. In order to improve the compactness of the structure and the mounting stability of the assembly part 791, the rotating part 772 has an assembly ring groove 776, the outer side wall of the assembly column 775 is the groove wall of the assembly ring groove 776; the rotating structure is formed with an assembly long groove 777, the assembly long groove 777 communicates with the assembly ring groove 776, and the first connecting arm 843 extends from the assembly ring groove 776 to the assembly long groove 777 and is fixed. The base support 760 is provided with a limiting groove 766 adjacent to the rotating part 772, and the second elastic arm 793 is mounted in the limiting groove 766.

[0184] In some embodiments, in order to improve the space utilization and compactness of the structural installation in the installation cavity 610, the tool bit 20 further comprises a sealing telescopic tube 810, a balance telescopic tube 830, and a connecting structure connecting the sealing telescopic tube 810 and the balance telescopic tube 830; the connecting structure has an avoiding opening 842, and the swing structure 770 passes through the avoiding opening 842. In some embodiments, in order to improve the moving range of the ultrasonic transducer 750, the base support 760 comprises a first support boss 718 and a second support boss 719 arranged at intervals; two guide rods 730 are further arranged in the shell 600, two ends of the two guide rods 730 are respectively connected with the inner side wall of the shell 600; the two guide rods 730 respectively pass through the first support boss 718 and the second support boss 719; the base support 760 is in sliding connection with the guide rods 730.

[0185] The application further provides a skin treatment device comprising the tool bit 20 in the above embodiments (using the cooperation of the electromagnet 930 and the magnetic body 931 as the driving mechanism 900), the skin treatment device comprising a handpiece 10 and the tool bit 20, the tool bit 20 being connected with one end of the handpiece 10. Wherein, the handpiece 10 comprises a driving assembly 210 and a transmission shaft 250 in transmission connection with the driving assembly 210, a driving end of the transmission shaft 250 being used for connecting with the transducer assembly 700 of the tool bit 20; the shell 600 of the tool bit 20 has an acoustic wave outlet 611; 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 of the tool bit 20 drives the ultrasonic transducer 750 of the tool bit 20 to move in a second direction, the first direction and the second direction being arranged in cross, so as to determine a path surface by the first direction and the second direction; when the transducer assembly 700 moves in the path surface, the distance between the transducer assembly 700 and the acoustic wave outlet 611 is basically consistent.

[0186] The above embodiments have basically introduced the structures related to the air vent hole 613 and the communication hole 612 in the shell 600, and the structures related to the acoustic wave outlet 611 will be introduced below. The sealing connection of the acoustic wave outlet 611 by the packaging film structure 950 can have many ways, which will be illustrated by examples in the complete technical solution.

[0187] Please refer to Figures 23 to 29In some embodiments, a cutter head 20 for a skin treatment device, the cutter head 20 comprising: a housing 600 having a mounting cavity 610 and an acoustic wave outlet 611 penetrating a side wall of the housing 600; a transducer assembly 700 disposed in the mounting cavity 610, the transducer assembly 700 corresponding to the acoustic wave outlet 611, an ultrasonic emission direction of the transducer assembly 700 being directed towards the acoustic wave outlet 611; and a packaging film structure 950 disposed on the housing 600, the packaging film structure 950 comprising a sound-transmitting film 951, an insulating support sheet 952 and a touch flexible circuit board 953 stacked together, the sound-transmitting film 951 covering the acoustic wave outlet 611, the insulating support sheet 952 and the flexible circuit board being located between the sound-transmitting film 951 and the housing 600, and the touch flexible circuit board 953 being configured to electrically connect with an electric control board.

[0188] In some embodiments, the sound-transmitting film 951 comprises a connecting region corresponding to the housing 600 surrounding the acoustic wave outlet 611 and a sound-transmitting region corresponding to the acoustic wave outlet 611, and the insulating support sheet 952 and the touch flexible circuit board 953 are disposed corresponding to the connecting region. In some embodiments, the touch flexible circuit board 953 comprises a touch portion and an electrical connection portion, one end of the electrical connection portion being connected with the touch portion and the other end being electrically connected with a master control board 153 of the cutter head 20, the touch portion being annularly arranged, and an inner ring side wall of the touch portion being flush with an inner side wall of the acoustic wave outlet 611. The insulating support sheet 952 is annularly arranged, and an inner ring side wall of the insulating support sheet 952 is flush with the inner side wall of the acoustic wave outlet 611. In some embodiments, in order to improve the connection reliability of the sound-transmitting film 951, the insulating support sheet 952 and the touch flexible circuit board 953, a first molten adhesive layer is provided between the sound-transmitting film 951 and the insulating support sheet 952, and / or a second molten adhesive layer is provided between the touch flexible circuit board 953 and the insulating support sheet 952. The first molten adhesive layer and the second molten adhesive layer can be formed by setting hot melt adhesive, or the adjacent structures can be fused together by a hot melt process.

[0189] In some embodiments, in order to balance the protection degree and touch sensitivity of the touch flexible circuit board 953, the ratio of the thickness of the insulating support sheet 952 to the thickness of the touch flexible circuit board 953 is 2-4, which can be 2.5-3.5, 2.7-3.2, etc.; and / or, the thickness of the insulating support sheet 952 is 0.2mm-0.4mm, which can be 0.25mm-0.35mm, 0.27mm-0.32mm, etc.; and / or, the thickness of the touch flexible circuit board 953 is 0.05mm-0.15mm, which can be 0.07mm-0.12mm, 0.09mm-0.1mm, etc. In some embodiments, in order to improve the mounting stability of the encapsulation film structure 950, the encapsulation film structure 950 further comprises a foam adhesive layer 954, one side of the foam adhesive layer 954 is attached to the shell 600 around the sound wave outlet 611, and the other side is attached to the touch flexible circuit board 953.

[0190] In some embodiments, the tool bit 20 further comprises a decorative shell 670 connected to the outer side wall of the shell 600; the decorative shell 670 has a relief opening 671 corresponding to the sound wave outlet 611; the relief opening 671 is sleeved on the outer side of the encapsulation film structure 950. In some embodiments, in order to further provide the mounting stability of the encapsulation film structure 950, the outer surface of the sound permeable film 951 does not protrude from the top of the edge of the relief opening 671; and / or, the inner side wall of the relief opening 671 abuts against the outer side wall of the encapsulation film structure 950. In some embodiments, in order to improve the convenience of disassembling the shell 600 and the decorative shell 670, the edge of the sound wave outlet 611 has an annular boss 615, and the encapsulation film structure 950 is mounted on the annular boss 615; the connection between the annular boss 615 and the shell 600 and the decorative shell 670 has a fitting gap 955.

[0191] The above embodiments mainly introduce the structure of the tool bit 20 in the skin treatment device, and the specific structure of the handpiece 10 is mainly introduced below. The handpiece 10 comprises a housing 100, a drive assembly 210 and a damping structure for damping the drive assembly 210 arranged in the housing 100, a key structure (unlocking key 510 structure, trigger key 133 structure) arranged on the housing 100, and a decorative piece 183 structure arranged on the housing 100. Similarly, the structure of the handpiece 10 is described first, and then the specific structure of the handpiece 10 is described in the complete technical solution.

[0192] The housing 100 includes a main shell 110 and a back shell 120, the main shell 110 having a front side 160 and a back side 150 oppositely arranged, 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 with the main shell 110 to cover the cavity opening 152. In some embodiments, a front shell can be arranged at the front side 160 of the main shell 110. The main shell 110 has a head portion 112 and a tail portion 113 oppositely arranged, the head portion 112 having a mounting slot 170 for mounting the tip 20, the mounting slot 170 having a mounting slot opening 171 for exposing the sound emitting area 21 of the tip 20, the assembly cavity 151 being in communication with the mounting slot 170 through the avoiding hole 111. The driving assembly 210 includes a driving motor 220 and a transmission mechanism 920, one end of the transmission shaft 250 being connected with the transmission mechanism 920, the other end of the transmission shaft 250 penetrating through the avoiding hole 111 into the mounting slot 170 and being connected with the transducer assembly 700 of the tip 20, so as to drive the transducer assembly 700 to move in the housing 600.

[0193] The structural features of the housing 100 will be described below in combination with complete embodiments.

[0194] Please refer to Figures 30 to 32 , and Figures 1 to 4 An ultrasonic beauty instrument for skin treatment device, the ultrasonic beauty instrument includes a housing 100 and a tip 20, the housing 100 has a head portion 112 and a tail portion 113, a holding area 140 and a placing slot 130 being formed between the head portion 112 and the tail portion 113, the placing slot 130 extending along the length direction of the housing 600, at least part of the placing slot 130 being located in the holding area 140, the placing slot 130 being used for placing fingers when a user holds the ultrasonic beauty instrument; the tip 20 being arranged at the head portion 112, the tip 20 having a mounting cavity 610, a sound emitting area 21 and an ultrasonic transducer 750 arranged in the mounting cavity 610, the ultrasonic transducer 750 being used for generating ultrasonic energy penetrating through the sound emitting area 21 and radiating into the skin to be treated.

[0195] In some embodiments, in order to further improve the convenience of the user holding the ultrasonic beauty instrument, the sound emitting area 21 is arranged towards one side of the shell 100, and the sound emitting area 21 is on the same side of the shell 100 as the placing groove 130. The shell 100 has an opposite arrangement of a back side 150 and a front side 160, the head 112 has a mounting groove 170, the cutter head 20 is mounted in the mounting groove 170, the mounting groove 170 has a mounting groove opening 171 for exposing the sound emitting area 21, the mounting groove opening 171 and the sound emitting area 21 are towards the front side 160; the placing groove 130 is formed on the front side 160 of the shell 100. In order to facilitate the operation of the keys, one end of the placing groove 130 close to the head 112 is provided with an activation key 133, and the activation key 133 is used to control the operation of the cutter head 20. And / or, the cutter head 20 is detachably connected to the head 112 through a locking structure 500, the locking structure 500 includes an unlocking key 510, the unlocking key 510 is used to release the locking of the cutter head 20 and the head 112; the unlocking key 510 is arranged in the placing groove 130 close to the head 112.

[0196] In some embodiments, in order to avoid the situation of accidental touch of the keys, the top of the activation key 133 does not protrude from the groove edge of the placing groove 130; and / or, the top of the unlocking key 510 does not protrude from the groove edge of the placing groove 130. In some embodiments, in order to improve the comfort of holding the handheld piece 10, the ratio of the groove width to the groove length of the placing groove 130 is 2 / 27-7 / 27, which can be 3 / 27-5 / 27, etc.; and / or, the groove width of the placing groove 130 is 1mm-4mm, which can be 2mm-3mm, etc.; and / or, the groove length of the placing groove 130 is 5mm-18mm, which can be 7mm-15mm, and can also be 9mm-12mm, etc.

[0197] In some embodiments, the shell 100 has an opposite arrangement of a back side 150 and a front side 160, the placing groove 130 is formed on the front side 160, the holding area 140 includes the placing groove 130 in the holding area 140, a first holding surface 121 on the back side 150, and two second holding surfaces 115 on opposite sides of the first holding surface 121, one second holding surface 115 connecting the first holding surface 121 and the groove opening edge of one side of the placing groove 130; the first holding surface 121 is arranged in an arc shape or substantially in an arc shape. In some embodiments, the intersection of the first holding surface 121 and the second holding surface 115 forms a first edge 116, and / or the intersection of the first holding surface 121 and the groove opening edge of the placing groove 130 forms a second edge 117. The first edge 116 and / or the second edge 117 extend along the length direction of the shell 100.

[0198] In some embodiments, the width of the first holding surface 121 is greater than the slot width of the placement slot 130, and / or the ratio of the width B1 of the first holding surface 121 to the slot width B2 of the placement slot 130 is 3-1.5, which can be 2.5-2, etc. In some embodiments, the head portion 112 is respectively provided with a limiting protrusion 193 on opposite sides, and the two limiting protrusions 193 are respectively located on both sides of the placement slot 130 in the circumferential direction of the shell 100; the side of the limiting protrusion 193 facing the tail portion 113 forms the holding area 140. The tail portion 113 is respectively provided with a limiting protrusion 195 on opposite sides, and the two limiting protrusions 195 are respectively located on both sides of the placement slot 130 in the circumferential direction of the shell 100; the side of the limiting protrusion 195 facing the head portion 112 forms the holding area 140. In some embodiments, when the head portion 112 is respectively provided with a limiting protrusion 193 on opposite sides, and the tail portion 113 is respectively provided with a limiting protrusion 195 on opposite sides, the size of the limiting protrusion 193 is greater than the size of the limiting protrusion 195. In some embodiments, in order to improve the safety of the ultrasonic beauty instrument, the placement slot 130 extends from the head portion 112 to the tail portion 113 along the length direction of the shell 100 and penetrates the tail portion 113, so that the placement slot 130 is in communication with the outside of the tail portion 113.

[0199] In some embodiments, in order to improve the safety of the ultrasonic beauty instrument, the ultrasonic beauty instrument has a placement surface 191 for abutting against a support; when the placement surface 191 abuts against the support, the slot of the placement slot 130 faces upward; the placement slot 130 is formed with a first flow guide surface 131 at the tail portion 113, and the distance between the first flow guide surface 131 and the placement surface 191 gradually decreases. The placement slot 130 is formed with a second flow guide surface 132 at the head portion 112, and the distance between the second flow guide surface 132 and the placement surface 191 gradually decreases. The distance between the slot 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.

[0200] Please refer to Figures 30 to 34 , and Figures 46 to 48 , the 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 oppositely arranged front and back sides 160 and 150; the main shell 110 has an assembly cavity 151, and the cavity opening 152 of the assembly cavity 151 faces the back side 150; the back shell 120 is connected with the main shell 110 to cover the cavity opening 152; one end of the main shell 110 has a mounting slot 170 for mounting a tool bit 20, and the mounting slot 170 has a mounting slot opening 171 for exposing the sound area 21 of the tool bit 20, and the mounting slot opening 171 faces the front side 160.

[0201] 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 close to the front side 160, so that the operator can install parts from the wider cavity opening 152 to the assembly cavity 151; at the same time, under the condition that the size of the sound emitting area 21 is constant, it is easier to position the sound emitting area 21 towards the front side 160 with smaller width than towards the back side 150 with larger width, which is beneficial for the user to better align the sound emitting area 21 with the human skin; in addition, when the user uses the skin treatment device, it is more convenient to hold the hand-held piece 10 when the side with smaller width faces the user, so that the hand-held piece 10 is convenient to assemble and also convenient for the user to hold and use.

[0202] In some embodiments, the hand-held piece 10 further comprises a driving assembly 210 and a transmission shaft 250, the driving assembly 210 is installed in the assembly cavity 151, a partition plate is arranged between the assembly cavity 151 and the mounting groove 170, the partition plate is provided with a relief hole 111, one end of the transmission shaft 250 is connected with the driving assembly 210, and the other end is used to extend into the mounting groove 170 through the relief hole 111 and be connected with the cutter head 20. In some embodiments, in order to improve the convenience of electrical connection between the cutter head 20 and the hand-held piece 10, a wire passing hole is arranged on the partition plate, and a main control board 153 is arranged in the assembly cavity 151; an electrical connection plate is arranged on a first plate surface of the partition plate facing the mounting groove 170, an electrical connection member 853 connects the electrical connection plate and the main control board 153 through the wire passing hole; an electrical connection terminal is arranged on a plate surface of the electrical connection plate facing the mounting groove 170, and the electrical connection terminal is used for electrical connection of the cutter head 20.

[0203] In some embodiments, the transmission shaft 250 extends from the position of the assembly cavity 151 close to the front side 160 to the middle of the installation slot 170. In order to improve the convenience of the installation and dismounting of the tool bit 20, while taking into account the utilization of space, the installation slot 170 has a plug-in opening 172, which is in communication with the installation slot opening 171, and the plug-in opening 172 is arranged along the length direction of the transmission shaft 250 away from the assembly cavity 151, and the plug-in opening 172 is used for the tool bit 20 to enter or exit the installation slot 170. In some embodiments, in order to improve the reliability of the user holding the handpiece 10, the shell 100 has an opposite head 112 and tail 113, and the head 112 has two opposite sides respectively provided with a limiting protrusion 193, and the two limiting protrusions 193 are respectively located on the two sides of the shell 100 in the circumferential direction; the main shell 110 has two oppositely arranged first limiting units 193a, and the back shell 120 has two oppositely arranged second limiting units 193b, and the first limiting unit 193a and the second limiting unit 193b combine to form the limiting protrusion 193. In some embodiments, the tail 113 has two opposite sides respectively provided with a limiting protrusion 195, and the two limiting protrusions 195 are respectively located on the two sides of the shell 100 in the circumferential direction; the main shell 110 has two oppositely arranged first limiting units 195a, and the back shell 120 has two oppositely arranged second limiting units 195b, and the first limiting unit 195a and the second limiting unit 195b combine to form the limiting protrusion 195. In some embodiments, the head 112 has two opposite sides respectively provided with a limiting protrusion 193, and the two limiting protrusions 193 are respectively located on the two sides of the shell 100 in the circumferential direction; the tail 113 has two opposite sides respectively provided with a limiting protrusion 195, and the two limiting protrusions 195 are respectively located on the two sides of the shell 100 in the circumferential direction; the two limiting protrusions 193, the two limiting protrusions 195, and the shell 100 between the limiting protrusions 193 and the limiting protrusions 195 combine to form a holding area 140 for the user to hold.

[0204] The limiting protrusion 193 can limit the holding position of the head 112 to prevent the handpiece 10 from being separated from the holding of the head 112; the limiting protrusion 195 can limit the holding position of the tail 113 to prevent the handpiece 10 from being separated from the holding of the tail 113. In this way, during the use of the skin treatment device by the user, when the user holds between the limiting protrusions 193 and the limiting protrusions 195, the reliability of the user holding the handpiece 10 is improved.

[0205] Please refer to Figures 35 to 40The manner of the locking structure 500 mentioned in the above embodiments can be various, and the structure thereof will be described in the complete embodiments below. A handpiece 10 for a skin treatment device, the skin treatment device comprising a cutter head 20, the handpiece 10 comprising: a housing 100, the housing 100 having an unlocking slot 155, the unlocking slot 155 having a detachable slot opening 156, the detachable slot opening 156 being in communication with the outside of the housing 600; a locking structure 500, the locking structure 500 being used for detachably connecting the cutter head 20 to the housing 100, the locking structure 500 being detachably mounted in the unlocking slot 155 through the detachable slot opening 156; the locking structure 500 comprising an unlocking button 510, the unlocking button 510 being used for unlocking the cutter head 20; a limiting cover plate 530, the limiting cover plate 530 being mounted on the housing 100 corresponding to the unlocking slot 155; the limiting cover plate 530 being provided with an unlocking hole 531, the unlocking button 510 being exposed to the limiting cover plate 530 through the unlocking hole 531.

[0206] In the embodiment, the unlocking slot 155 has a dismounting slot 156 which is externally communicated with the shell 600, and the unlocking structure can be mounted and dismounted through the dismounting slot 156, and the dismounting slot 156 is covered by the limiting cover plate 530, so that the mounting and dismounting of the unlocking structure does not need to pass through the assembly cavity 151 of the shell 100, but only needs to be operated through the unlocking slot 155 and the dismounting slot 156; in this way, the mounting and dismounting of the unlocking key 510 can be independent of the mounting of other components in the shell 100, and the unlocking structure does not need to be operated in a deep assembly cavity 151, which greatly improves the convenience of mounting and dismounting of the unlocking structure and is beneficial to replacement and maintenance of the unlocking structure. One end of the shell 100 has a mounting slot 170 for mounting the tool bit 20, and the unlocking structure includes a locking piece 520, one end of the locking piece 520 is connected with the unlocking key 510, and the other end extends into the mounting slot 170 for locking connection with the tool bit 20. There are many specific forms of the locking piece 520, for example, the locking piece 520 includes a locking portion 523, a rotating portion 522 and an unlocking portion 521, and the rotating portion 522 is located between the locking portion 523 and the unlocking portion 521. The unlocking portion 521 is connected with the unlocking key 510, the locking portion 523 extends into the mounting slot 170, and the rotating portion 522 is rotationally connected with the slot wall of the unlocking slot 155. Alternatively, the rotating portion 522 is rotationally mounted on the side of the limiting cover plate 530 facing the unlocking slot 155, one of the rotating portion 522 and the limiting cover plate 530 has a rotating pin shaft, and the other has a rotating pin hole, and the rotating pin shaft is inserted into the rotating pin hole. Regarding the cooperation between the rotating portion 522 and the limiting cover plate 530, an ear can be arranged on the limiting cover plate 530, a rotating pin hole is arranged on the ear, a rotating pin shaft is arranged on the rotating portion 522, and the rotating pin shaft is inserted into the rotating pin hole to rotationally connect the locking piece 520 and the limiting cover plate 530. In order to ensure that the unlocking portion 521 has sufficient movement range, an unlocking gap 157 is arranged on the slot wall shared by the unlocking slot 155 and the mounting slot 170, and the unlocking gap 157 is used for swinging of the locking portion 523 when the unlocking key 510 is pressed. In order to improve the convenience of user operation, the shell 100 has a front side 160, the unlocking key 510 is exposed to the front side 160, the mounting slot 170 has a mounting slot opening 171 for exposing the sound area 21 of the tool bit 20, and the mounting slot opening 171 faces the front side 160. The front side 160 is provided with a placing groove 130 which extends along the length direction of the shell 100 and is used for placing fingers when a user holds the hand-held piece 10. In order to improve the convenience of mounting of the limiting cover plate 530, the limiting cover plate 530 includes a plate body and a plug-in column 550, the plug-in column 550 is arranged on the plate surface of the plate body facing the unlocking slot 155, and the shell 100 near the unlocking slot 155 is provided with a plug-in hole 158, and the plug-in column 550 is plugged into the plug-in hole 158.In order to improve the stability of the installation of the limiting cover plate 530, the limiting cover plate 530 comprises a covering part 532 and a matching part 533, the covering part 532 is used for covering the unlocking slot 155, and the matching part 533 is bent and overlapped on the groove edge of the installation slot 170 away from the covering part 532. In order to make the unlocking button 510 can be smooth and continuous operation, the elastic member 540 is arranged at the position of the locking member 520 which is away from the unlocking button 510.

[0207] Please refer to Figures 33 to 36 The specific case of the installation of the decoration piece 183 on the shell 100 will be introduced below, and the case will be described in combination with the complete embodiment.

[0208] The application further provides an ultrasonic beauty instrument, which comprises a shell 100, an outer side wall of the shell 100 has a containing groove 185, a groove bottom of the containing groove 185 is formed with a sol slot 186; a decoration piece 183 is installed in the containing groove 185 and exposed through a groove opening of the containing groove 185, at least part of the decoration piece 183 extends into the sol slot 186; a glue layer is arranged between the outer side wall of the decoration piece 183 and the groove wall of the containing groove 185, and a glue layer is arranged between the outer side wall of the decoration piece 183 and the groove wall of the sol slot 186; a cutter head 20 is arranged at one end of the shell 100; the cutter head 20 has an installation cavity 610, a sound emitting area 21 and an ultrasonic transducer 750 arranged in the cutter head 20, the ultrasonic transducer 750 is used for generating ultrasonic energy which is emitted into the skin to be treated through the sound emitting area 21.

[0209] In the embodiment, the sol slot 186 is arranged at the groove bottom of the containing groove 185, so that the sol slot 186 can deposit the excess glue after the containing groove 185 cooperates with the decoration piece 183, and the phenomenon that the appearance surface is polluted by the overflow of the excess glue is avoided, which is beneficial to simplify the cleaning process of the product; at the same time, the sol slot 186 can accommodate more glue, so that the thickness of the glue layer in the sol slot 186 is larger, so that the connection strength of the decoration piece 183 in the sol slot 186 is higher, which is beneficial to improve the installation stability of the decoration piece 183; at the same time, the glue layer in the containing groove 185 and the glue layer in the sol slot 186 are connected, so that the overall strength of the glue structure is increased, which is beneficial to improve the installation stability of the decoration piece 183.

[0210] In some embodiments, to further improve the mounting stability of the decoration piece 183, the decoration piece 183 comprises a decoration part and an assembly part 791 connected with the decoration part, the decoration part is exposed to the accommodating groove 185, and the assembly part 791 is mounted to the accommodating groove 185; a sol gap 189 is left between the outer side wall of at least part of the assembly part 791 and the groove wall of the accommodating groove 185, and a glue layer is arranged in the sol gap 189. In some embodiments, the sol gap 189 can also be realized in the following way: the outer side wall of the mounting part has a first inclined surface 18b, the groove wall of the accommodating groove 185 has a second inclined surface 18a, the inclination of the first inclined surface 18b is greater than the inclination of the second inclined surface 18a, so as to form the sol gap 189 between the first inclined surface 18b and the second inclined surface 18a. In some embodiments, to improve the assembly efficiency of the ultrasonic beauty instrument, the shell 100 comprises a shell body 190 and a decoration cover 180, the decoration cover 180 is fixedly arranged on the outer side wall of the shell body 190, and the accommodating groove 185 and the sol groove 186 are formed on the decoration cover 180. In some embodiments, to reduce the thickness of the decoration cover 180, the decoration cover 180 comprises a cover plate 188 and an assembly boss 187, the assembly boss 187 is located on the plate surface of the cover plate 188 facing the main shell 110, the assembly boss 187 protrudes towards the shell body 190, and the accommodating groove 185 and the sol groove 186 are arranged corresponding to the position of the assembly boss 187. In some embodiments, to improve the assembly compactness of the decoration cover 180, the shell body 190 has an assembly recess 197 corresponding to the assembly boss 187, the assembly boss 187 is inserted into the assembly recess 197, and the cover plate 188 and the main shell 110 are relatively surface-adhered (including full-adhered and partial-adhered). In some embodiments, to improve the mounting stability of the decoration cover 180, the shell body 190 has a mounting cover groove 196 corresponding to the decoration cover 180, and the decoration cover 180 is mounted to the mounting cover groove 196. In some embodiments, to facilitate the disassembly of the decoration cover 180, the overall shape of the mounting cover groove 196 is arranged in a U shape, and one end of the decoration cover 180 extends out of the mounting cover groove 196 through the opening of the U shape.

[0211] The decoration cover 180 can have many forms, such as an integrally arranged decoration cover 180 or a split arrangement and then assembled to form a decoration cover 180. In this embodiment, the decoration cover 180 comprises an inner cover 182 and an outer cover 181, and the outer cover 181 is sleeved on the peripheral side of the inner cover 182. The outer cover 181 is arranged in a U shape, and the end surface of the inner cover 182 is exposed through the opening of the U shape; and / or, the surface of the outer cover 181 and the surface of the inner cover 182 are located in the same plane.

[0212] See Figures 41 to 45The form and component division of the drive structure 200 in the housing 100 of the handpiece 10 can have many forms in terms of the layout of the drive structure 200. 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 with the transmission assembly 230, and the transmission assembly 230 is connected with a transmission shaft 250. The transmission assembly 230 includes the transmission rod 231 and a transmission block 232, the transmission block 232 is threadedly connected with the transmission rod 231, one end of the transmission rod 231 is connected with the drive motor 220, and 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 with the transmission block 232, and the other end is used to be connected with a transducer assembly 700 in the tool bit 20, and the transmission shaft 250 moves with the movement of the transmission block 232.

[0213] The technical solutions related to the drive structure 200 are described below in combination with complete embodiments.

[0214] The application discloses a handpiece 10 for a skin treatment device, the skin treatment device comprising a cutter head 20, the cutter head 20 being provided with a transducer assembly 700. The handpiece 10 comprises: a housing 100, one end of the housing 100 being used for assembling the cutter head 20; a driving structure 200, the driving structure 200 comprising a driving assembly 210 arranged along the length direction of the housing 100 and a transmission shaft 250, the transmission shaft 250 being used for driving the transducer assembly 700 to move; a driving support 300, the driving support 300 comprising a mounting rack 310, a support column 330 and a buffer pad 320, the mounting rack 310 being used for mounting the driving assembly 210, one end of the support column 330 being fixedly connected with the mounting rack 310, the other end being fixedly connected with the inner side wall of the housing 100, and the buffer pad 320 being arranged at the connection position of the support column 330 and the driving support 300; and the driving assembly 210 and the mounting rack 310 being hung on the support column 330. In the embodiment, the vibration generated by the driving assembly 210 and the mounting rack 310 during operation is transmitted to the housing 100 through the support column 330 by hanging the driving assembly 210 and the mounting rack 310 on the support column 330; the vibration on the mounting rack 310 needs to pass through the buffer pad 320 and then be transmitted to the support column 330 by arranging the buffer pad 320 at the connection position of the mounting rack 310 and the support column 330; in the process of passing through the buffer pad 320, the buffer pad 320 absorbs the vibration energy (converts the mechanical energy of the vibration into potential energy of deformation and heat energy) by elastic deformation, greatly reduces the amount of vibration transmitted from the mounting rack 310 to the support column 330, and is beneficial to reducing the vibration feeling of the housing 100; meanwhile, the buffer pad 320 is arranged at the support column 330 and the support column 330 support, direct contact between two hard components is avoided, the noise generated by contact vibration between the hard components can be reduced, and the noise generated by the handpiece 10 during operation can be reduced.

[0215] In some embodiments, in order to further improve the vibration reduction effect of the motor, the buffer pad 320 has elasticity, the buffer pad 320 comprises a first buffer part 321, a second buffer part 322 and a buffer arm 323 connecting the first buffer part 321 and the second buffer part 322, the buffer arm 323 is provided with a mounting hole 325 penetrating through both ends thereof; the mounting rack 310 is provided with an assembly hole 311, the first buffer part 321 passes through the assembly hole 311, so that the first buffer part 321 and the second buffer part 322 clamp the mounting rack 310, and the buffer arm 323 is located in the assembly hole 311; and the end of the support column 330 away from the housing 100 is inserted into the mounting hole 325 and fixedly connected with the mounting rack 310.

[0216] There can be many forms of connection between the support column 330 and the driving bracket 300, which are illustrated as examples below. In some embodiments, the driving bracket 300 further comprises a pressing structure, and the end of the support column 330 that is fitted with the buffer pad 320 is a fastening end 332; the fastening end 332 passes through the mounting hole 325, and the pressing structure is fastened with the fastening end 332 to press the first buffer part 321. In other embodiments, the fastening end 332 has a fastening hole, and the pressing structure is fitted with the fastening end 332 through the fastening hole to press the first buffer part 321. In some embodiments, in order to improve the stability of the installation of the buffer pad 320, a support strip 331 is arranged on the side wall of the support column 330, and the support strip 331 is used to abut against the second buffer part 322. In some embodiments, in order to improve the stability of the installation of the driving structure, the number of support columns 330 is multiple, the multiple support columns 330 are distributed on both sides of the driving assembly 210 in the width direction, and a connecting wall 333 is arranged between the support columns 330 on the same side of the driving assembly 210; and / or, the length direction of the support column 330 is perpendicular to the length direction of the shell 100. In some embodiments, the mounting bracket 310 comprises a mounting plate 312 and a hanging arm 313 arranged at both ends of the mounting plate 312, the driving assembly 210 is mounted on the hanging arm 313, and the support column 330 is fixedly connected with the mounting plate 312.

[0217] In some embodiments, the driving assembly 210 comprises a driving motor 220 and a transmission assembly 230, the transmission assembly 230 comprises a transmission rod 231 and a transmission block 232, both ends of the transmission rod 231 are rotatably connected with two hanging arms 313 respectively; the transmission block 232 is threadedly fitted with the transmission rod 231, so that the transmission block 232 can move along the transmission rod 231; one end of a transmission shaft 250 is fixedly connected with the transmission block 232 to move along the length direction of the shell 600 with the movement of the transmission block 232; the driving motor 220 is mounted on the side wall of the hanging arm 313 which faces away from the transmission rod 231; the output shaft of the driving motor 220 is fixedly connected with the end of the transmission rod 231.

[0218] In some embodiments, in order to further improve the moving accuracy of the transmission block 232, a guide column 236 is arranged on the transmission block 232, a guide groove 315 is arranged on the mounting plate 312 and extends along the length direction of the housing 100, and the guide column 236 is inserted into the guide groove 315 so that the transmission block 232 moves along the direction of the guide groove 315. In some embodiments, in order to improve the moving accuracy of the transmission shaft 250, the drive assembly 210 further comprises a guide rod 270, both ends of the guide rod 270 are fixedly connected with the two suspension arms 313 respectively; the transmission block 232 is provided with a guide hole 235, and the guide rod 270 passes through the guide hole 235; and / or, the housing 100 has a head portion 112 for mounting the tool bit 20, and the suspension arm 313 adjacent to the head portion 112 is provided with a guide hole 316, and the transmission shaft 250 passes through the guide hole 316.

[0219] Please refer to Figure 47 and 48 There are many forms of driving connection between the handpiece 10 and the tool bit 20, and the following complete technical solution is taken as an embodiment for specific description. A tool bit 20 for a skin treatment device, the skin treatment device comprising a handpiece 10 provided with a driving structure 200; the tool bit 20 comprising: a housing 600, the housing 600 having a mounting cavity 610 and a communication hole 612, the communication hole 612 penetrating through the side wall of the housing 600; a transducer assembly 700 movably arranged in the mounting cavity 610; a sealed telescopic tube 810, the sealed telescopic tube 810 having a fixed portion 819, the fixed portion 819 being fixedly connected with the transducer assembly 700; the sealed telescopic tube 810 having an open end 811, the open end 811 being sealingly connected with the housing 600 at the communication hole 612; a linkage shaft 680, one end of the linkage shaft 680 extending into the sealed telescopic tube 810 through the communication hole 612 and the open end 811 and being installed at the fixed portion 819, the other end of the linkage shaft 680 being used for connecting with the driving structure 200 through a quick release structure 880; wherein, the housing 600 is detachably mounted on the handpiece 10, and the linkage shaft 680 is used for connecting the driving structure 200 and the transducer assembly 700, so as to drive the transducer assembly 700 to move.

[0220] Specifically, in the embodiment, the approximate structures of the driving structure 200, the shell 600, the sealed telescopic tube 810, the transducer assembly 700, etc. can refer to the above embodiments, which will not be repeated here. The connection mode of the linkage shaft 680 and the fixed part 819 can be various, such as connection through fasteners 852, connection through buckling, connection through magnetic adsorption, connection through threads, connection through welding, connection through plug-in tight fit, etc. The linkage shaft 680 and the driving structure 200 are connected through the quick release structure 880, so that the linkage shaft 680 and the driving structure 200 can be quickly assembled and disassembled. Among them, the quick release structure 880 can be a magnetic adsorption connection structure, a buckle connection structure, a shaft hole plug-in tight fit structure, a threaded connection structure, a connector structure, etc. The connection position of the linkage shaft 680 and the driving structure 200 can be inside the handheld piece 10, or inside the handheld piece 10. Specifically, it needs to be determined according to the form of the quick release structure 880. For example, when the quick release structure 880 is connected through magnetic adsorption, plug-in tight fit connection, etc. (structures that can realize quick connection and disassembly without relying on vision and operation space), the connection position of the linkage shaft 680 and the driving structure 200 can be inside the handheld piece 10. On the contrary, if the quick release structure 880 relies on vision or needs a certain operation space, the connection position of the linkage shaft 680 and the driving structure 200 is preferably outside the handheld piece 10 shell 100.

[0221] In the embodiment, the linkage shaft 680 is arranged to extend into the sealed telescopic tube 810 through the communication hole 612 and the open end 811 and is installed on the fixed part 819 at one end, and the other end is exposed outside the shell 600, so that the exposed end of the linkage shaft 680 can be quickly installed and disassembled with the driving structure 200 through the quick release structure 880, thereby realizing the quick installation and disassembly of the tool bit 20 and the handheld piece 10, which is beneficial to the operation of the user.

[0222] In some embodiments, the handheld piece 10 includes a shell 100 having an assembly cavity 151, the driving structure 200 includes a driving assembly 210 and a transmission shaft 250, the driving assembly 210 is arranged in the assembly cavity 151, one end of the transmission shaft 250 is in driving connection with the driving assembly 210, and the other end extends to the outside of the driving cavity and is connected with the linkage shaft 680 through the quick release structure 880.

[0223] Specifically, in the embodiment, the end of the transmission shaft 250 away from the driving assembly 210 is exposed outside the shell 100. At this time, the connection position of the transmission shaft 250 and the linkage shaft 680 is located outside the shell 100 and the shell 600, the operator can see the connection position, and there is enough space to operate the quick release structure 880. In this way, it is beneficial to improve the convenience of quickly installing and disassembling the transmission shaft 250 and the linkage shaft 680.

[0224] In some embodiments, the quick release structure 880 comprises a first magnetic member 260 and a second magnetic member 820, the first magnetic member 260 is fixedly connected with the driving structure 200, and the second magnetic member 820 is fixedly connected with the exposed end of the linkage shaft 680. The first magnetic member 260 can be fixedly connected with the driving structure 200 in many ways, such as threaded connection, screw fastening connection, buckle connection, adhesive connection, welding, etc. The second magnetic member 820 can be fixedly connected with the linkage shaft 680 in many ways, such as threaded connection, screw fastening connection, buckle connection, adhesive connection, welding, etc. Of course, in some embodiments, the linkage shaft 680 itself can be a magnetic member. The first magnetic member 260 and the second magnetic member 820 can be electromagnets 930, magnets, metal iron, or other components with magnetic or magnetic attraction capabilities. Taking the first magnetic member 260 and the second magnetic member 820 as examples, the first magnetic member 260 and the second magnetic member 820 can be magnetically attracted.

[0225] In some embodiments, the quick release structure 880 comprises a first plug-in structure and a second plug-in structure, the first plug-in structure is fixedly connected with the driving structure 200, and the second plug-in structure is arranged at the exposed end of the linkage shaft 680; the first plug-in structure and the second plug-in structure are plug-in connected. Specifically, in this embodiment, the connection mode of the first plug-in structure with the driving structure 200 and the connection mode of the second plug-in structure with the linkage shaft 680 can be many, such as threaded connection, screw fastening connection, buckle connection, adhesive connection, welding, etc. In some embodiments, the second plug-in structure can be integrally formed with the linkage shaft 680. One of the first plug-in structure and the second plug-in structure has a plug-in slot, and the other has a plug-in head, which is plug-in tightly matched.

[0226] In some embodiments, the quick release structure 880 comprises a first buckle structure and a second buckle structure, the first buckle structure is arranged at the exposed end of the transmission shaft 250, and the second buckle structure is arranged at the exposed end of the linkage shaft 680; the first buckle structure and the second buckle structure are buckled together. Specifically, in this embodiment, the connection mode of the first buckle structure with the transmission shaft 250 and the connection mode of the second buckle structure with the linkage shaft 680 can be many, such as threaded connection, screw fastening connection, buckle connection, adhesive connection, welding, etc. In some embodiments, the first buckle structure can be integrally formed with the transmission shaft 250, and the second buckle structure can be integrally formed with the linkage shaft 680. One of the first buckle structure and the second buckle structure has a buckle position or a buckle hole, and the other has a buckling part, which is buckled with the buckle position or the buckle hole to realize the buckling of the first buckle structure and the second buckle structure.

[0227] In some embodiments, the quick release structure 880 comprises a first threaded structure and a second threaded structure, the first threaded structure is arranged on the exposed end of the transmission shaft 250, and the second threaded structure is arranged on the exposed end of the linkage shaft 680; the first threaded structure and the second threaded structure are threadedly connected. Specifically, in the present embodiment, the connection mode of the first threaded structure with the transmission shaft 250 and the connection mode of the second threaded structure with the linkage shaft 680 can be various, such as threaded connection, screw fastening connection, buckle connection, adhesive connection, welding, etc. In some embodiments, the first threaded structure and the transmission shaft 250 can be integrally formed, and the second threaded structure and the linkage shaft 680 can be integrally formed. One of the first threaded structure and the second threaded structure has an internal thread, and the other has an external thread, and the internal thread and the external thread are matched to achieve the threaded connection of the first threaded structure and the second threaded structure. Among them, the one with the internal thread can be a threaded hole, and the one with the external thread can be a threaded shaft.

[0228] In some embodiments, one of the exposed end of the transmission shaft 250 and the exposed end of the linkage shaft 680 is provided with a quick release head structure, and the other is detachably connected with the quick release head structure. Specifically, in the present embodiment, the quick release head structure has a fastening hole, and the exposed end of the transmission shaft 250 or the linkage shaft 680 can be inserted into the fastening hole, and then the inserted shaft end is fastened by a pressing mechanism or a clamping mechanism. Of course, in some embodiments, the exposed end of the transmission shaft 250 and the exposed end of the linkage shaft 680 can be respectively inserted into the two ends of the quick release head structure, and then connected by threaded connection or clamping mechanism.

[0229] The specific structure of the fixed part 819 and the sealing telescopic pipe 810 will be described below, and the specific details can refer to the above embodiments, which will not be repeated here. The fixed part 819 is a self-closing structure. The sealing telescopic pipe 810 is a self-closing end 812 at one end away from the open end 811, and the fixed part 819 is located at the self-closing end 812. The fixed part 819 is formed between the two ends of the sealing telescopic pipe 810 to form a first telescopic part 81a and a second telescopic part 81b on both sides of the fixed part 819, the first telescopic part 81a has an open end 811; the end of the second telescopic part 81b away from the fixed part 819 is formed as a self-closing end 812 connected to the shell 600, or the end of the second telescopic part 81b away from the fixed part 819 is sealingly connected to the shell 600. The fixed part 819 is formed between the two ends of the sealing telescopic pipe 810 to form a first telescopic part 81a and a second telescopic part 81b on both sides of the fixed part 819, the first telescopic part 81a has an open end 811; and the end of the second telescopic part 81b away from the fixed part 819 is formed as a self-closing end 812 connected to the shell 600, the first telescopic section and the second telescopic section are in communication at the position of the fixed part 819; or the shell 600 is formed with a ventilation hole 613 penetrating the side wall of the shell 600, and the end of the second telescopic part 81b away from the fixed part 819 is sealingly connected to the ventilation hole 613.

[0230] The skin treatment device also includes a handheld piece 10 and a tool bit 20, and the specific structure of the handheld piece 10 and the tool bit 20 refers to the above embodiments. Since the skin treatment device adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0231] The above is only a preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation, combination of technical solutions of different embodiments, or direct / indirect application in other related technical fields under the utility model concept of the utility model is included in the patent protection range of the utility model.

Claims

1. A head for a skin treatment device, characterized in that, The skin treatment device comprises a handpiece provided with a driving structure; The cutter head comprises: A housing having a mounting cavity and a communication hole penetrating through the side wall of the housing; A transducer assembly movably arranged in the mounting cavity; A sealed telescopic tube having a fixed portion fixedly connected with the transducer assembly; the sealed telescopic tube has an open end sealingly connected with the housing at the communication hole; A linkage shaft having one end extending into the sealed telescopic tube through the communication hole and the open end and being installed at the fixed portion, and the other end being used for connecting with the driving structure through a quick release structure; The housing is detachably mounted on the handpiece, and the linkage shaft is used for connecting the driving structure and the transducer assembly to drive the transducer assembly to move.

2. The tool bit of claim 1 wherein, The handpiece comprises a shell having an assembly cavity, and the driving structure comprises a driving assembly arranged in the assembly cavity and a transmission shaft having one end transmissionally connected with the driving assembly and the other end extending to the outside of the driving cavity and connected with the linkage shaft through the quick release structure.

3. A tool bit as claimed in claim 1 or 2, characterised in that, The quick release structure comprises a first magnetic body fixedly connected with the driving structure and a second magnetic body fixedly connected with the exposed end of the linkage shaft; or, The quick release structure comprises a first plug-in structure fixedly connected with the driving structure and a second plug-in structure arranged at the exposed end of the linkage shaft; the first plug-in structure and the second plug-in structure are plug-in and matched connected.

4. The tool bit of claim 2 wherein, The quick release structure comprises a first buckle structure arranged at the exposed end of the transmission shaft and a second buckle structure arranged at the exposed end of the linkage shaft; the first buckle structure and the second buckle structure are buckled and matched.

5. The tool bit of claim 2 wherein, One of the exposed end of the transmission shaft and the exposed end of the linkage shaft is provided with a quick release head structure, and the other is detachably connected with the quick release head structure.

6. The tool bit of claim 2 wherein, The quick release structure comprises a first threaded structure arranged at the exposed end of the transmission shaft and a second threaded structure arranged at the exposed end of the linkage shaft; the first threaded structure and the second threaded structure are screwedly connected.

7. The tool bit of claim 1 wherein, The fixed portion is a self-closing structure, one end of the sealed telescopic tube away from the open end is a self-closing end, and the fixed portion is located at the self-closing end.

8. The tool bit of claim 1 wherein, The fixed portion is formed between the two ends of the sealed telescopic tube to form a first telescopic portion and a second telescopic portion on both sides of the fixed portion, and the first telescopic portion has the open end; One end of the second telescopic portion away from the fixed portion is formed as a self-closing end connected with the housing, or one end of the second telescopic portion away from the fixed portion is sealingly connected with the housing.

9. The tool bit of any one of claims 1 to 5, wherein, The fixed portion is formed between the two ends of the sealed telescopic tube to form a first telescopic portion and a second telescopic portion on both sides of the fixed portion, and the first telescopic portion has the open end; and, An end of the second telescopic part away from the fixed part is formed as a self-closed end connected with the shell, and the first telescopic part and the second telescopic part are in communication at the position of the fixed part; Alternatively, the shell is formed with a ventilation hole penetrating a side wall of the shell, and an end of the second telescopic part away from the fixed part is sealingly connected to the ventilation hole.

10. A skin treatment device characterized by, The skin treatment device comprises a handpiece and a cutting head as claimed in any one of claims 1 to 9.

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