Skin care device

Abstract

Disclosed is a skin care device, comprising a housing, a transmission shaft assembly, and a transducer assembly. The transmission shaft assembly is movably arranged in the housing. The transducer assembly is mounted at the end of the transmission shaft assembly that is close to a sound output region of the housing. The transmission shaft assembly is configured to make an ultrasound focus of the transducer assembly rotate around a first axis, and the ultrasound focus of the transducer assembly is misaligned with the first axis. The transmission shaft assembly is further configured to drive the transducer assembly to move in an extension direction of the first axis.

Description

A skin care device

[0001] This application requires filing with the Chinese Patent Office on August 30, 2024, application number 202422136816.9;

[0002] The application was filed with the Chinese Patent Office on August 30, 2024, with application number 202422133260.8.

[0003] The application was filed with the Chinese Patent Office on August 30, 2024, with application number 202422135531.3.

[0004] The application was filed with the Chinese Patent Office on August 30, 2024, with application number 202422131263.8.

[0005] The application was filed with the Chinese Patent Office on August 30, 2024, with application number 202422135624.6.

[0006] The application was filed with the Chinese Patent Office on August 30, 2024, with application number 202422136747.1.

[0007] The application was filed with the Chinese Patent Office on August 30, 2024, with application number 202422133369.1.

[0008] Filed with the Chinese Patent Office on August 30, 2024, application number 202422135557.8; and,

[0009] Priority is claimed in Chinese Patent Application No. 202411217253.4, filed with the Chinese Patent Office on August 30, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0010] This application belongs to the field of beauty technology, and in particular relates to a skin care device. Background Technology

[0011] Ultrasonic skincare, such as microfocused ultrasound (MFU) beauty technology, is a common skincare method in the medical aesthetics industry. During the treatment, the ultrasonic transducer inside the ultrasonic skincare device generates focused ultrasound waves to create treatment points under the skin, thereby achieving anti-aging and lifting effects.

[0012] Specifically, ultrasonic skin care devices surpass the depth limitations of traditional non-surgical equipment, penetrating deep into the SMAS fascia layer. Ultrasonic energy concentrates at the skin care points, generating high temperatures that cause the target tissues in the lower layers of the skin to contract under these high temperatures, stimulating collagen regeneration. This results in anti-aging, wrinkle reduction, firming, lifting, and contouring effects. For example, the energy waves generated by the ultrasonic transducer act directly on the fascia layer, causing it to contract. Technical solutions

[0013] The first aspect of this application provides a skin care device, comprising:

[0014] The outer casing has a sound-emitting area;

[0015] A drive shaft assembly, movably disposed within the housing; and

[0016] A transducer assembly is mounted at one end of the drive shaft assembly near the sound output area, and the ultrasonic focus of the transducer assembly passes through the sound output area to be configured to penetrate the skin to be treated.

[0017] The drive shaft assembly is rotatably mounted within the housing about a first axis to be configured to cause the ultrasonic focus of the transducer assembly to rotate about the first axis; the ultrasonic focus of the transducer assembly is misaligned with the first axis, and the drive shaft assembly is further configured to move along the extension direction of the first axis to be configured to drive the transducer assembly to move in the extension direction of the first axis, thereby being configured to bring the transducer assembly closer to or away from the sound emission area.

[0018] A second aspect of this application provides a skin care device, comprising:

[0019] The outer casing has a sound-emitting area;

[0020] A drive shaft assembly is movably disposed within the housing. The drive shaft assembly includes a drive shaft and a drive component. The drive component includes a mounting shaft and is mounted on the drive shaft. The drive shaft extends along a first axis. The mounting shaft is located on the side of the drive component near the sound output area and is inclined to the first axis.

[0021] A transducer assembly mounted on the mounting axis, the transducer assembly being inclined relative to the first axis such that the ultrasonic focus of the transducer assembly is misaligned with the first axis, the ultrasonic focus of the transducer assembly passing through the sound emission area to be configured to penetrate the skin to be treated; and

[0022] A second drive assembly is connected to the drive shaft and is configured to drive the drive shaft to rotate about the first axis, thereby being configured to drive the ultrasonic focal point of the transducer assembly to rotate about the first axis.

[0023] A third aspect of this application provides a skin care device, comprising:

[0024] The outer casing has a sound-emitting area;

[0025] A dielectric housing, at least partially disposed within the outer shell, wherein the dielectric housing or the dielectric housing and the outer shell form a dielectric chamber, the dielectric chamber being configured to store an ultrasonic wave conducting medium;

[0026] A drive shaft assembly, comprising a drive member and a drive shaft, one end of the drive shaft extending into the medium chamber, the drive member being mounted on the end of the drive shaft extending into the medium chamber; the drive member having a first support surface on the side away from the drive shaft; and

[0027] A transducer assembly, the transducer assembly being mounted on the first support surface, wherein the ultrasonic focus of the transducer assembly passes through the sound output area to be configured to penetrate the skin to be treated;

[0028] The transmission component is provided with a limiting groove and a clearance groove. The clearance groove is located on the side of the limiting groove away from the first support surface. Both the limiting groove and the clearance groove penetrate the outer surface of the transmission component to one side to form a mounting opening. The clearance groove also penetrates the outer surface of the transmission component to the side away from the limiting groove. One end of the transmission shaft is formed with a limiting protrusion. One end of the transmission shaft is disposed in the transmission component through the mounting opening, and the limiting protrusion is limited within the limiting groove, so that the transmission shaft can drive the transmission component and the transducer assembly to move.

[0029] A fourth aspect of this application provides a skin care device, comprising:

[0030] The housing is elongated and includes a first end along its length, the end face or peripheral surface of the first end having a working area; and

[0031] A skin care component disposed on the housing, the skin care component being configured to care for the skin to be treated from the side of the housing where the working area is located;

[0032] The outer shell has a recessed portion on its peripheral surface configured for gripping. The recessed portion extends along the length direction of the outer shell, and the length of the recessed portion in the extending direction is greater than or equal to 3 cm. The extending direction of the recessed portion is inclined to the length direction of the outer shell.

[0033] A fifth aspect of this application provides a skin care device, comprising:

[0034] The outer casing has a sound-emitting area;

[0035] A drive shaft is movably disposed within the housing and extends along a first axis.

[0036] A transducer assembly, mounted on one end of the drive shaft near the sound emission area, wherein the ultrasonic focus of the transducer assembly passes through the sound emission area and is configured to penetrate the skin to be treated; and

[0037] A driving assembly includes a first driving assembly and a second driving assembly. The first driving assembly is located on the side of the drive shaft away from the sound output area and is drively connected to the drive shaft. The first driving assembly is configured to drive the drive shaft to rotate along a first axis so that the focal point of the transducer assembly rotates about the first axis. The second driving assembly is located between the first driving assembly and the transducer assembly. The second driving assembly is located on one side of the drive shaft in the circumferential direction and is drively connected to the drive shaft. The second driving assembly is configured to drive the drive shaft to move along the extension direction of the first axis so as to move the transducer assembly in the extension direction of the first axis.

[0038] A sixth aspect of this application provides a skin care device, comprising:

[0039] The outer casing has a sound-emitting area;

[0040] A dielectric housing, at least partially disposed within the outer shell, wherein the dielectric housing or the dielectric housing and the outer shell form a dielectric chamber, the dielectric chamber being configured to store an ultrasonic wave conducting medium; wherein the dielectric housing further comprises a second mounting hole communicating with the dielectric chamber;

[0041] A drive shaft assembly, comprising a drive shaft and a second seal, wherein the drive shaft is movably and sealingly mounted in a second mounting hole via the second seal, such that one end of the drive shaft extends into a medium chamber; wherein the second seal is sealingly disposed between the inner wall of the second mounting hole and the peripheral surface of the drive shaft, the second seal comprising an inner ring sealing portion surrounding the drive shaft, the inner ring sealing portion being elastic to tightly conform to the peripheral surface of the drive shaft, and / or, the second seal further comprising an elastic element configured to drive the inner ring sealing portion to tightly conform to the peripheral surface of the drive shaft; and

[0042] A transducer assembly disposed within the media chamber, the transducer assembly being mounted on one end of the drive shaft located within the media chamber, the ultrasonic focus of the transducer assembly being configured to pass through the sound emission area to be directed into the skin to be treated.

[0043] A seventh aspect of this application provides a skin care device, comprising:

[0044] The housing includes a first end face having a sound-emitting area and a third side face that is bent and connected to the first end face;

[0045] A dielectric housing, at least partially disposed within the outer shell, wherein the dielectric housing or the dielectric housing and the outer shell form a dielectric chamber, the dielectric chamber being configured to store an ultrasonic wave conducting medium;

[0046] A transducer assembly disposed within the dielectric chamber, wherein the ultrasonic focus of the transducer assembly passes through the sound emission area and is configured to penetrate the skin to be treated; and

[0047] An electrical stimulation assembly includes an electrode pad located at least partially on a first end face and at least partially on a third side face, the electrode pad being configured to contact the skin to be treated to output a current to the skin to be treated.

[0048] The eighth aspect of this application provides a skin care device, comprising:

[0049] The outer casing has a sound-emitting area;

[0050] A dielectric housing, at least partially disposed within the outer shell, wherein the dielectric housing or the dielectric housing and the outer shell form a dielectric chamber, the dielectric chamber being configured to store an ultrasonic wave conducting medium; wherein the dielectric housing further comprises a second mounting hole communicating with the dielectric chamber;

[0051] A drive shaft assembly includes a drive shaft that is movably and sealingly mounted in a second mounting hole along a first axial direction, such that one end of the drive shaft extends into the medium chamber; the drive shaft has an annular transmission groove on its peripheral side, the transmission groove being located outside the medium housing;

[0052] A transducer assembly disposed within the dielectric chamber, the transducer assembly being mounted on one end of the drive shaft extending into the dielectric chamber, the ultrasonic focus of the transducer assembly passing through the sound emission area to be configured to penetrate the skin to be treated; and

[0053] A first drive assembly is disposed within the housing. The first drive assembly includes a first motor and a pusher. The first motor is driveably connected to the pusher. The drive end of the pusher is rotatably engaged in the transmission groove relative to the transmission shaft to form a transmission connection. The first motor is configured to drive the transmission shaft to move along the first axis direction via the pusher. Attached Figure Description

[0054] Figure 1 is a schematic diagram of the skin care device provided in the embodiment of this application.

[0055] Figure 2 is a cross-sectional view of the skin care device shown in Figure 1 along the AA direction.

[0056] Figure 3 is a schematic diagram of the first installation structure of the drive shaft assembly and transducer assembly shown in Figure 2.

[0057] Figure 4 is a schematic diagram of the second installation structure of the drive shaft assembly and transducer assembly shown in Figure 2.

[0058] Figure 5 is a schematic diagram of the third installation structure of the drive shaft assembly and transducer assembly shown in Figure 2.

[0059] Figure 6 is a magnified view of part Y in Figure 3.

[0060] Figure 7 is an exploded view of the drive shaft assembly and transducer assembly shown in Figure 3.

[0061] Figure 8 is a perspective view of the drive shaft assembly and transducer assembly shown in Figure 3.

[0062] Figure 9 is a partial cross-sectional view of the skin care device shown in Figure 1 along the AA direction.

[0063] Figure 10 is a schematic diagram of the structure of the elastic deformation component shown in Figure 9.

[0064] Figure 11 is a schematic diagram of the acoustic membrane shown in Figure 9.

[0065] Figure 12 is a cross-sectional view of the medium shell shown in Figure 9.

[0066] Figure 13 is a schematic diagram of one structure of the medium shell shown in Figure 9.

[0067] Figure 14 is a schematic diagram of the assembly of the drive assembly, transmission shaft assembly and medium housing shown in Figure 2.

[0068] Figure 15 is a cross-sectional view of Figure 14.

[0069] Figure 16 is a schematic diagram of the second transmission structure of the drive assembly and transmission shaft assembly shown in Figure 14.

[0070] Figure 17a and 17b in Figure 17 are schematic diagrams of the third and fourth transmission structures of the drive assembly and transmission shaft assembly shown in Figure 14, respectively.

[0071] Figure 18 is a schematic diagram of the structure of the second mounting bracket shown in Figure 9.

[0072] Figure 19 is a schematic diagram of the structure of the second mounting bracket and drive assembly shown in Figure 9.

[0073] Figure 20 is a schematic diagram of the skin care device shown in Figure 1 after part of the outer shell has been removed.

[0074] Figure 21 is a schematic diagram of the structure of the second circuit board assembly and the drive assembly shown in Figure 2.

[0075] Figure 22 is a schematic diagram of the skin care device shown in Figure 1 after removing another part of the outer shell.

[0076] Figure 23 is a magnified view of part X in Figure 2.

[0077] Figure 24 is a schematic diagram of the structure of the electrode sheet shown in Figure 23.

[0078] Figure 25 is a schematic diagram of the skin care device shown in Figure 1.

[0079] Figure 26 is an exploded view of the drive shaft assembly shown in Figure 8.

[0080] Figure 27 is a schematic diagram of the structure of the elastic deformation component shown in Figure 9.

[0081] Figure 28 is a schematic diagram of various holding scenarios for the skin care device shown in Figure 1.

[0082] Figure 29 is a schematic diagram of the skin care device shown in Figure 1 (Figure 3).

[0083] Figure 30 is a schematic diagram of the skin care device shown in Figure 1 (Figure 4).

[0084] Figure 31 is a schematic diagram of the skin care device shown in Figure 1 (Figure 5).

[0085] Figure 32 is an exploded view of the outer casing of the skin care device shown in Figure 1.

[0086] Figure 33 is a cross-sectional view of the skin care device shown in Figure 1.

[0087] Figure 34 is a schematic diagram of the structure of the first decorative shell of the skin care device shown in Figure 33.

[0088] Figure 35 is a schematic diagram of the structure of the second decorative shell of the skin care device shown in Figure 33.

[0089] Figure 36 is a schematic diagram of the skin care device shown in Figure 1 after the protective cover is installed.

[0090] Figure 37 is a schematic diagram of the structure of the second mounting bracket shown in Figure 9. Embodiments of the present invention

[0091] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0092] Please refer to Figures 1 and 2. This application embodiment provides a skin care device, including a housing 100 and a skin care component 200a. The housing 100 has a working area 111a. The skin care component 200a is disposed on the housing 100 and configured to care for the skin to be treated from the side where the working area 111a of the housing 100 is located.

[0093] For example, the skin care device is an ultrasonic beauty instrument, the working area 111a includes a sound-emitting area 111, and the skin care component 200a includes a transducer component 200, the ultrasonic focus of the transducer component 200 passing through the sound-emitting area 111 to be configured to penetrate the skin to be treated.

[0094] Of course, depending on the needs, the skin care device can also have more functions. For example, the skin care component 200a may also include at least one of an electrical stimulation component, a light-based skin care component, and a heat-based skin care component. This application embodiment does not limit this.

[0095] Through creative work, the inventor discovered that in related technologies, ultrasonic skin care devices can only form skin care points at fixed locations under the skin during use. If it is necessary to care for subcutaneous skin at different depths, it is necessary to change beauty heads of different depths, which is inconvenient to use. In addition, the beauty heads also require extra space for storage, resulting in a poor user experience.

[0096] Therefore, in some embodiments, the skin care device may further include a drive shaft assembly 300, which is movably disposed within the housing 100. A transducer assembly 200 is mounted at one end of the drive shaft assembly 300 near the sound output area 111, so that the drive shaft assembly 300 can drive the transducer assembly 200 to move. Thus, the position of the ultrasonic focal point of the transducer assembly 200 can be adjusted via the drive shaft assembly 300 to improve the skin care effect of the device.

[0097] The ultrasonic focal point of the transducer assembly 200 is the focal point formed by focusing the ultrasonic energy generated by the transducer assembly 200.

[0098] In some embodiments, the skin care device may further include a drive assembly 400 disposed within the housing 100 and configured to drive the transducer assembly 200 to move, thereby adjusting the position of the ultrasonic focal point of the transducer assembly 200 to improve the skin care effect of the skin care device.

[0099] It should be noted that the skin care device may have only one of the drive shaft assembly 300 and the drive assembly 400, or it may have both of them. For example, when the skin care device has only the drive shaft assembly 300, the user can manually drive the drive shaft assembly 300 to move, thereby indirectly driving the transducer assembly 200. When the skin care device has only the drive assembly 400, the drive assembly 400 can be directly connected to the transducer assembly 200 to drive the transducer assembly 200. When the skin care device has both the drive shaft assembly 300 and the drive assembly 400, the drive assembly 400 can drive the transducer assembly 200 through the drive shaft assembly 300. This embodiment does not limit the scope of the application.

[0100] The above is a general description of the skin care device. The technical solutions of the embodiments of this application will be explained and described below in conjunction with the drive shaft assembly 300.

[0101] In some embodiments, the drive shaft assembly 300 is rotatably mounted within the housing 100 about a first axis L1 to be configured to cause rotation of the ultrasonic focal point of the transducer assembly 200 about the first axis L1; and / or, the drive shaft assembly 300 is further configured to move along the extension direction of the first axis L1 to be configured to drive the transducer assembly 200 to move in the extension direction of the first axis L1, thereby being configured to bring the transducer assembly 200 closer to or away from the sound-emitting region 111.

[0102] It should be noted that in this application, "and / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the related objects before and after it are in an "or" relationship.

[0103] In other words, the drive shaft assembly 300 can be rotatably mounted inside the housing 100 only around the first axis L1, or it can be movably mounted inside the housing 100 only along the first axis L1, or it can be rotatably mounted inside the housing 100 and movably mounted along the first axis L1. This application embodiment does not limit this.

[0104] Taking the drive shaft assembly 300, which is rotatable and movable along the first axis L1 and installed inside the housing 100, as an example, when the skin care device is working, on the one hand, the drive shaft assembly 300 can drive the transducer assembly 200 to move along the first axis L1, thereby driving the transducer assembly 200 closer to or further away from the sound output area 111. This allows the ultrasonic focus of the transducer assembly 200 to be adjusted to different depths within the skin to be treated, enabling ultrasonic skin care for skin at different subcutaneous depths. On the other hand, the drive shaft assembly 300 can drive the transducer assembly 200 to rotate around the first axis L1, thereby driving the ultrasonic focus of the transducer assembly 200 to rotate around the first axis L1. This allows the ultrasonic focus of the transducer assembly 200 to act on different positions at the same depth within the skin to be treated, thus performing ultrasonic skin care. This increases the effective area of ​​ultrasonic skin care and improves the skin care effect.

[0105] Therefore, in this embodiment of the application, the position of the ultrasonic focus of the transducer assembly 200 under the skin can be adjusted by the transmission shaft assembly 300, so as to realize ultrasonic skin care for different parts of the skin at the same depth and / or different parts at different depths.

[0106] It is understandable that the first axis L1 can be the axis of the drive shaft assembly 300.

[0107] In some embodiments, the ultrasonic focal point of the transducer assembly 200 is misaligned with the first axis L1, so that as the transducer assembly 200 rotates around the first axis L1 along with the drive shaft assembly 300, the ultrasonic focal point of the transducer assembly 200 can rotate around the first axis L1.

[0108] For example, referring to Figure 3, the transducer assembly 200 includes an ultrasonic transducer 21. The ultrasonic transducer 21 (or the axis of the transducer assembly 200) is inclined to the first axis L1, so that the ultrasonic focal point of the transducer assembly 200 is misaligned with the first axis L1. Alternatively, the axis of the ultrasonic transducer 21 is inclined to the first axis L1, so that the focal point of the transducer assembly 200 is misaligned with the first axis L1.

[0109] It is understandable that by tilting the transducer assembly 200 so that the end away from the sound output area 111 moves closer to the first axis L1, thus reserving more space for other structures, which is beneficial for the miniaturization design of the skin care device; it can also reduce the movement range of the transducer assembly 200, thereby reducing the pressure change range in the medium chamber, which will be described later.

[0110] It should be noted that when the skin care device is working, it can form a continuous ultrasonic focus distributed around the first axis L1, or it can form an intermittent ultrasonic focus distributed around the first axis L1.

[0111] Optionally, please continue to refer to Figure 4. The transducer assembly 200 includes an ultrasonic transducer 21, which is eccentrically positioned with respect to the first axis L1, so that the ultrasonic focal point of the transducer assembly 200 is misaligned with the first axis L1.

[0112] It is understandable that when the ultrasonic transducer 21 is eccentrically set with respect to the first axis L1, the transducer assembly 200 (or the axis of the transducer assembly 200) can be parallel to the first axis L1.

[0113] In some embodiments, the transducer assembly 200 is fixedly mounted to the drive shaft assembly 300 without relative rotation or movement, thereby improving the reliability of the transducer assembly 200 installation. However, during the movement of the transducer assembly 200 driven by the drive shaft assembly 300, the power cable connected to the transducer assembly 200 may become tangled, eventually causing the drive shaft assembly 300 to jam.

[0114] As shown in Figure 3, based on this, in a first embodiment to avoid tangling of the power cord connected to the transducer assembly 200, the ultrasonic transducer 21 is rotatably mounted on the drive shaft assembly 300 about the second axis L2. This is configured so that the transducer assembly 200 rotates relative to the drive shaft assembly 300 about the second axis L2 during the movement of the transducer assembly 200 driven by the drive shaft assembly 300, thereby preventing tangling. In other words, by changing the fixed connection between the transducer assembly 200 and the drive shaft assembly 300, which prevents relative rotation, to a connection that allows rotation about the second axis L2, tangling is avoided.

[0115] It should be noted that the ultrasonic transducer 21 is rotatably mounted on the transmission shaft assembly 300 around the second axis L2. This can be achieved by the entire transducer assembly 200 being rotatably mounted on the transmission shaft assembly 300 around the second axis L2, thereby allowing the ultrasonic transducer 21 to be rotatably mounted on the transmission shaft assembly 300 around the second axis L2. Alternatively, the transducer assembly 200 may include a first mounting bracket 22 on which the ultrasonic transducer 21 is mounted, with the ultrasonic transducer 21 rotatably mounted on the first mounting bracket 22 around the second axis L2, thus allowing the ultrasonic transducer 21 to be rotatably mounted on the transmission shaft assembly 300 around the second axis L2. This embodiment of the application does not limit this specific configuration.

[0116] It is also understood that, as mentioned above, the drive shaft assembly 300 can be configured to drive the transducer assembly 200 to move along the first axis L1 and / or drive the transducer assembly 200 to rotate about the first axis L1; correspondingly, the transducer assembly 200 being rotatably mounted on the drive shaft assembly 300 about the second axis L2 can also be configured to avoid wire tangling when the drive shaft assembly 300 drives the transducer assembly 200 to move and / or rotate, and this application embodiment does not limit this.

[0117] Taking a drive shaft assembly 300 configured to drive a transducer assembly 200 to rotate about a first axis L1 as an example, the transducer assembly 200 (e.g., an ultrasonic transducer 21) is provided with a first electrical connection terminal 211 configured to connect an electrical connection wire. During the movement of the transducer assembly 200 driven by the drive shaft assembly 300, the transducer assembly 200 can rotate relative to the drive shaft assembly 300 about a second axis L2 so that the first electrical connection terminal 211 always faces the same side of the circumferential direction of the first axis L1 during the movement of the transducer assembly 200, thus avoiding wire tangling. That is, it prevents the power wire connected to the transducer assembly 200 from getting wrapped around the drive shaft assembly 300 or the circumferential direction of the transducer assembly 200, thereby preventing wire tangling.

[0118] In some embodiments, the second axis L2 may be the axis of the ultrasonic transducer 21, or the second axis L2 may be parallel to the axis of the ultrasonic transducer 21. For example, when the axis of the ultrasonic transducer 21 is inclined to the first axis L1, the second axis L2 may be inclined to the first axis L1; when the axis of the ultrasonic transducer 21 is parallel to the first axis L1, the second axis L2 may be parallel to the first axis L1. This application does not limit this aspect.

[0119] Referring to Figure 5, in an optional second embodiment to prevent the power cord connected to the transducer assembly 200 from becoming tangled, the drive shaft assembly 300 has a lead hole 311 extending along the extension direction of the first axis L1. The electrical connection wires connected to the transducer assembly 200 are led out from the lead hole 311 and are configured to avoid tangling during the rotation of the transducer assembly 200 by the drive shaft assembly 300. That is, during the rotation of the transducer assembly 200 by the drive shaft assembly 300, the power cord connected to the transducer assembly 200 can be prevented from wrapping around the outer periphery of the drive shaft assembly 300.

[0120] For example, the skin care device may include a first electrical connection line 23, one end of which is connected to a first electrical connection terminal 211 of the transducer assembly 200, and the other end is at least partially located within a lead hole 311. The drive shaft assembly 300 may be provided with a second electrical connection terminal 312, which is electrically connected to the other end of the first electrical connection line 23. The drive shaft assembly 300 may also include an electrical connection structure that can be connected to the circuit board of the skin care device, and the second electrical connection terminal 312 can be rotatably connected to this electrical connection structure.

[0121] Optionally, the electrical connection structure may be a socket with a circular and / or annular socket, which is located inside the lead hole 311 or outside the lead hole 311 and corresponding to the lead hole 311.

[0122] Optionally, the electrical connection structure may be an annular conductive portion 313.

[0123] For example, the second electrical connection terminal 312 is at least partially exposed on the peripheral surface of the drive shaft assembly 300 for electrical connection. The electrical connection structure is an annular conductive portion 313, which is rotatably fitted onto the drive shaft assembly 300 and slides against the second electrical connection terminal 312 to form an electrical connection. Furthermore, when the drive shaft assembly 300 rotates, the second electrical connection terminal 312 slides on the annular conductive portion 313 and can always be in contact with the annular conductive portion 313. The annular conductive portion 313 can remain stationary around the first axis L1 so that other power lines can be connected to the annular conductive portion 313 for power supply.

[0124] Referring to Figures 6 and 7, in some embodiments, the drive shaft assembly 300 has a first support surface 321 at one end near the sound output region 111, and the transducer assembly 200 is mounted on the first support surface 321. The first support surface 321 can be inclined with respect to the first axis L1, so that the transducer assembly 200 is inclined with respect to the first axis L1. Furthermore, the first support surface 321 can provide better support for the inclined transducer assembly 200, thereby improving the stability and reliability of the transducer assembly 200 during rotation. For example, the axis of the ultrasonic transducer 21 can be perpendicular to the first support surface 321.

[0125] Of course, the first support surface 321 can also be perpendicular to the first axis L1. For example, the first support surface 321 is perpendicular to the first axis L1, and the transducer assembly 200 is eccentrically disposed on the first support surface 321 so that the ultrasonic focal point of the transducer assembly 200 is misaligned with the first axis L1. This application embodiment does not limit this.

[0126] In some embodiments, the transducer assembly 200 is movably mounted on the first support surface 321 such that the distance between the ultrasonic focal point of the transducer assembly 200 and the first axis L1 is adjustable, and / or, the transducer assembly 200 is rotatably mounted on the first support surface 321 along a third axis such that the angle between the transducer assembly 200 and the first support surface 321 is adjustable.

[0127] In other words, the distance between the ultrasonic focal point of the transducer assembly 200 and the first axis L1 can be adjusted, while the angle between the transducer assembly 200 and the first support surface 321 cannot be adjusted; or the distance between the ultrasonic focal point of the transducer assembly 200 and the first axis L1 can be fixed, while the angle between the transducer assembly 200 and the first support surface 321 can be adjusted; or the distance between the ultrasonic focal point of the transducer assembly 200 and the first axis L1 can be adjusted, and the angle between the transducer assembly 200 and the first support surface 321 can be adjusted. This application does not limit this aspect.

[0128] When the distance between the ultrasonic focal point of the transducer assembly 200 and the first axis L1 is adjustable, the radius of rotation of the ultrasonic focal point around the first axis L1 can be adjusted, thereby enabling treatment of large or small areas of the skin. For example, the transducer assembly 200 can be slidably mounted on the first support surface 321, allowing the transducer assembly 200 to slide along the first support surface 321, thereby moving the ultrasonic focal point of the transducer assembly 200 away from or away from the first axis L1.

[0129] Similarly, when the angle between the transducer assembly 200 and the first support surface 321 is adjustable, the rotation radius of the ultrasonic focus around the first axis L1 can be adjusted, thereby enabling the care of large or small areas of the skin.

[0130] In some embodiments, the tilt angle between the first support surface 321 and the first axis L1 is adjustable, thereby adjusting the angle between the transducer assembly 200 mounted on the first support surface 321 and the first axis L1, and thus adjusting the rotation radius of the ultrasonic focus around the first axis L1, ultimately achieving the treatment of large or small areas of the skin.

[0131] In some embodiments, the transducer assembly 200 is rotatably mounted on the first support surface 321 about a second axis L2 to be configured to avoid wire tangling during the rotation of the transducer assembly 200 by the drive shaft assembly 300.

[0132] For example, as mentioned above, the transducer assembly 200 is provided with a first electrical connection terminal 211 configured to connect an electrical connection wire. During the movement of the transducer assembly 200 driven by the drive shaft assembly 300, the transducer assembly 200 can rotate relative to the drive shaft assembly 300 about a second axis L2 so that the first electrical connection terminal 211 always faces the same side of the first axis L1 circumferentially during the movement of the transducer assembly 200, thereby avoiding wire tangling, i.e., preventing the power wire connected to the transducer assembly 200 from winding around the drive shaft assembly 300 or the circumferential direction of the transducer assembly 200, thus preventing wire tangling.

[0133] In summary, for both configurations of the ultrasonic transducer 21 described above—an inclined configuration of the ultrasonic transducer 21 relative to the first axis L1, causing the ultrasonic focal point of the transducer assembly 200 to be misaligned with the first axis L1; and an eccentric configuration of the ultrasonic transducer 21 relative to the first axis L1, causing the ultrasonic focal point of the transducer assembly 200 to be misaligned with the first axis L1—the above-mentioned anti-tangle wire solution can be utilized. Specifically, a skin care device includes: a housing 100, with a sound-emitting area 111; a drive shaft assembly 300 movably disposed within the housing 100; and a transducer assembly 200 mounted at the end of the drive shaft assembly 300 near the sound-emitting area 111. The ultrasonic focus of transducer assembly 200 passes through sound emission area 111 to be configured to penetrate the skin to be treated; drive shaft assembly 300 is rotatably mounted in housing 100 about a first axis L1, and the ultrasonic focus of transducer assembly 200 is misaligned with the first axis L1 to be configured to rotate the ultrasonic focus of transducer assembly 200 about the first axis L1; transducer assembly 200 includes ultrasonic transducer 21, which is rotatably mounted in drive shaft assembly 300 about a second axis L2 to be configured to rotate transducer assembly 200 relative to drive shaft assembly 300 about the second axis L2 during the movement of transducer assembly 200 driven by drive shaft assembly 300, to be configured to avoid tangling. Alternatively, a skin care device may include: a housing 100 having a sound-emitting area 111; a drive shaft assembly 300 movably disposed within the housing 100; and a transducer assembly 200 mounted at one end of the drive shaft assembly 300 near the sound-emitting area 111, the ultrasonic focus of the transducer assembly 200 passing through the sound-emitting area 111 to be configured to penetrate the skin to be treated; the drive shaft assembly 300 being rotatably mounted within the housing 100 about a first axis L1, the ultrasonic focus of the transducer assembly 200... The transducer assembly 200 is offset from the first axis L1 and configured to allow the ultrasonic focal point of the transducer assembly 200 to rotate about the first axis L1. The transducer assembly 200 includes an ultrasonic transducer 21, and the drive shaft assembly 300 has a lead hole 311 extending along the extension direction of the first axis L1. An electrical connection wire connected to the transducer assembly 200 is led out from the lead hole 311. The skin care device may include a first electrical connection wire 23, one end of which is connected to a first electrical connection terminal 211 of the transducer assembly 200, and the other end is at least partially located within the lead hole 311. The drive shaft assembly 300 may have a second electrical connection terminal 312, which is electrically connected to the other end of the first electrical connection wire 23. The drive shaft assembly 300 also includes an electrical connection structure that can be connected to the circuit board of the skin care device, and the second electrical connection terminal 312 can be rotatably connected to this electrical connection structure.

[0134] For example, one of the first support surface 321 and the transducer assembly 200 is provided with a first mounting hole 2211, and the other is provided with a mounting shaft 322. The mounting shaft 322 is rotatably mounted in the first mounting hole 2211 along a second axis L2, so that the transducer assembly 200 is rotatably mounted on the first support surface 321 about the second axis L2. The second axis L2 is inclined relative to the first axis L1.

[0135] It is understandable that the centerline of the mounting shaft 322 and / or the centerline of the first mounting hole 2211 can coincide with the second axis L2, thereby making the rotational installation of the transducer assembly 200 more stable and reliable through the rotational engagement of the hole and shaft.

[0136] In some embodiments, the transducer assembly 200 includes a bearing 24. The bearing 24 is disposed between the mounting shaft 322 and the inner wall of the first mounting hole 2211, thereby reducing the frictional force when the transducer assembly 200 rotates about the second axis L2, so that the transducer assembly 200 can rotate more smoothly about the second axis L2.

[0137] Optionally, the transducer assembly 200 may include a sliding ring 24a, which is disposed between the mounting shaft 322 and the inner wall of the first mounting hole 2211, thereby reducing the frictional force when the transducer assembly 200 rotates around the second axis L2, so that the transducer assembly 200 can rotate around the second axis L2 more smoothly.

[0138] Furthermore, compared to the bearing 24, the sliding ring sleeve 24a has the advantage of lower cost. For example, the sliding ring sleeve 24a can be a metal part. Of course, the sliding ring sleeve 24a can also be made of plastic or ceramic materials with a lower coefficient of friction than the mounting shaft 322, etc., and this application embodiment does not limit this.

[0139] Taking the mounting shaft 322 disposed on the first support surface 321 as an example, the transducer assembly 200 may further include a sliding washer 25. A sliding ring 24a is disposed between the mounting shaft 322 and the inner wall of the first mounting hole 2211. The sliding washer 25 is sleeved on the outside of the mounting shaft 322, with one side abutting against the first support surface 321 and the other side abutting against the sliding ring 24a and / or the end face of the opening of the first mounting hole 2211. Thus, the sliding ring 24a reduces the friction on the peripheral surface of the mounting shaft 322, and the sliding washer 25 reduces the friction at the first support surface 321, allowing the transducer assembly 200 to rotate more smoothly.

[0140] The sliding pad 25 can be a metal part. Of course, the sliding pad 25 can also be made of plastic or ceramic materials with a lower coefficient of friction than the first support surface 321, and this application embodiment does not limit this.

[0141] In some embodiments, the first support surface 321 may be provided with a structural groove 3211, and the mounting shaft 322 is connected to the bottom wall of the structural groove 3211. The sliding washer 25 abuts against the end face of the groove opening of the structural groove 3211 and covers the groove opening of the structural groove 3211. Therefore, in the actual manufacturing process, it is possible to avoid the formation of a protrusion at the connection between the mounting shaft 322 and the first support surface 321 that would abut against the sliding washer 25, thereby preventing the sliding washer 25 from tilting relative to the first support surface 321, and allowing the sliding washer 25 to be stably installed on the first support surface 321.

[0142] In some embodiments, the sliding ring 24a may protrude from the end face of the first mounting hole 2211 facing the first support surface 321. This causes the sliding pad 25 to abut against the first support surface 321 and the sliding ring 24a, thereby reducing the contact area and further reducing friction at the first support surface 321.

[0143] In some embodiments, the transducer assembly 200 further includes a first fastener 26, which includes a connecting portion 261 and a clamping portion 262. A sliding ring sleeve 24a is disposed between the mounting shaft 322 and the inner wall of the first mounting hole 2211, and a sliding washer 25 is sleeved on the outside of the mounting shaft 322. The connecting portion 261 is connected to the mounting shaft 322 so that the clamping portion 262 clamps the sliding ring sleeve 24a. The clamping portion 262 also forms a sliding ring groove with the first support surface 321. The hole wall of the first mounting hole 2211 is rotatably limited outside the sliding ring groove. That is, the hole wall of the first mounting hole 2211 can be partially located inside the sliding ring groove, thereby forming a limit, and partially located outside the sliding ring groove.

[0144] In some embodiments, the transducer assembly 200 may include a first mounting bracket 22 and an ultrasonic transducer 21. The ultrasonic transducer 21 is mounted on the first mounting bracket 22. Thus, the ultrasonic transducer 21 can be secured to the drive shaft assembly 300 via the first mounting bracket 22.

[0145] For example, the mounting shaft 322 is disposed on the first support surface 321, and the first mounting bracket 22 has a first side surface 2212 disposed opposite to the first support surface 321, i.e., the first side surface 2212 faces the first support surface 321. A side protrusion 2213 is provided on the first side surface 2212, and a first mounting hole 2211 is provided on the side protrusion 2213 and passes through the first mounting bracket 22. For example, the side protrusion 2213 may be an annular protrusion disposed around the mounting shaft 322. Thus, the ultrasonic transducer 21 can be mounted through the rotational engagement of the mounting shaft 322 and the side protrusion 2213.

[0146] In some embodiments, the first mounting bracket 22 is rotatably mounted on the first support surface 321 along the second axis L2. The first mounting bracket 22 has a first side surface 2212 disposed opposite to the first support surface 321 and a second side surface 2214 disposed opposite to the first side surface 2212. The ultrasonic transducer 21 is mounted on the second side surface 2214.

[0147] In some embodiments, the first support surface 321 is provided with a mounting shaft 322. The first side surface 2212 is provided with a first mounting hole 2211 penetrating the first mounting bracket 22. The mounting shaft 322 is rotatably mounted within the first mounting hole 2211 along a second axis L2 inclined to the first axis L1, so that the ultrasonic transducer 21 is rotatably mounted on the first support surface 321. The transducer assembly 200 also includes a first fastener 26, which is fixedly connected to the mounting shaft 322 from the second side surface 2214 to restrict the first mounting bracket 22 from moving away from the first support surface 321 along the second axis L2. Thus, the first fastener 26 enables a rotatable connection between the transducer bracket and the mounting shaft 322, preventing the transducer assembly 200 from falling off the mounting shaft 322.

[0148] In some embodiments, the second side surface 2214 is a bearing surface, and the bearing surface is provided with a receiving groove 2215, in which the ultrasonic transducer 21 is disposed. Thus, the receiving groove 2215 can achieve a better positioning effect for the ultrasonic transducer 21.

[0149] In some embodiments, the second side surface 2214 is a bearing surface, and the bearing surface is provided with a relief groove 2216, the bottom of which is spaced from the ultrasonic transducer 21. Thus, the relief groove 2216 can form a space for installing the first fastener 26.

[0150] For example, the clearance trough 2216 is formed on the bottom wall of the trough 2215, and the end of the first fastener 26 away from the first support surface 321 is housed in the clearance trough 2216 and spaced apart from the ultrasonic transducer 21. Thus, during the rotation of the first mounting bracket 22 relative to the mounting shaft 322 around the second axis L2, the ultrasonic transducer 21 is less likely to come into contact with the first fastener 26 and be worn.

[0151] In some embodiments, the first mounting bracket 22 includes a support portion 221 and a first engaging portion 222. The support portion 221 has a first side surface 2212 and a second side surface 2214, and the first engaging portion 222 protrudes from the second side surface 2214. The first engaging portion 222 engages with the ultrasonic transducer 21 so that the ultrasonic transducer 21 is fixed to the support portion 221.

[0152] It is understood that the first engaging part 222 and the supporting part 221 can be integrally formed or separately formed, and the embodiments of this application do not limit this.

[0153] For example, the first engaging portion 222 includes an embedded portion 2221 and an elastic portion 2222. The embedded portion 2221 is embedded within the supporting portion 221. The elastic portion 2222 is connected to the embedded portion 2221 and is located outside the supporting portion 221. One end of the elastic portion 2222, facing away from the embedded portion 2221, protrudes from the second side surface 2214. The end of the elastic portion 2222, facing away from the embedded portion 2221, is provided with a latch and / or a locking protrusion to be configured to engage and fix with the ultrasonic transducer 21.

[0154] Therefore, the first engaging portion 222 can be made of a material with higher strength than the supporting portion 221 to improve the stability and reliability of the transducer assembly 200 engagement. For example, the first engaging portion 222 can be a metal part. In the actual manufacturing process, the first engaging portion 222 can be placed as an insert into the injection mold to injection mold the supporting portion 221 that encloses the embedded portion 2221.

[0155] The number of elastic parts 2222 can be at least two, and at least two elastic parts 2222 are arranged at circumferential intervals along the ultrasonic transducer 21, thereby locking from the circumferential side of the ultrasonic transducer 21.

[0156] In some embodiments, the ultrasonic transducer 21 has a first electrical connection line 23 on the side facing the second side 2214, and the second side 2214 has a wiring notch 2217. The first electrical connection line 23 is routed through the wiring notch 2217. Therefore, it can also be understood that the ultrasonic transducer 21 is routed from the surface away from the sound output area 111, so as to avoid the first electrical connection line 23 blocking the space between the ultrasonic transducer 21 and the sound output area 111 during use.

[0157] For example, the first electrical connection line 23 is routed through the wiring notch 2217. The first electrical connection line 23 is connected to the peripheral edge of the side surface of the ultrasonic transducer 21 facing the first support surface 321. Furthermore, the first electrical connection line 23 can avoid the mounting shaft 322 located in the middle of the ultrasonic transducer 21.

[0158] As mentioned above, the transducer assembly 200 is provided with a first electrical connection terminal 211, which can be located at the peripheral edge of the side surface of the ultrasonic transducer 21 facing the first support surface 321.

[0159] In some embodiments, a sealant is provided at the connection between the first electrical connection terminal 211 and the first electrical connection line 23 to improve the stability and reliability of the connection between the first electrical connection terminal 211 and the first electrical connection line 23.

[0160] In some embodiments, a wiring notch 2217 is provided on the peripheral surface of the first mounting bracket 22 and extends through the first side surface 2212 and the second side surface 2214 to facilitate the wiring of the ultrasonic transducer 21.

[0161] In some embodiments, the drive shaft assembly 300 includes a drive shaft 31 having a first axis L1 and a transmission member 32 mounted on the drive shaft 31, with a first support surface 321 disposed at the end of the transmission member 32 facing away from the drive shaft 31. Thus, a larger first support surface 321 can be formed by a single transmission member 32, thereby increasing the contact area between the drive shaft assembly 300 and the transducer assembly 200, which increases the sealing area and improves the stability and reliability of the transducer assembly 200 installation.

[0162] For example, the end of the drive shaft 31 near the drive member 32 is located inside the drive member 32 to achieve the connection between the drive member 32 and the drive shaft 31; or, the side of the drive member 32 away from the first support surface 321 is provided with a connecting protrusion, which is connected to the drive shaft 31, such as by means of screws; or, the side of the drive member 32 away from the first support surface 321 is provided with a connecting insertion protrusion, and the free end of the drive member 32 is provided with a insertion hole, and the connecting insertion protrusion is inserted into the insertion hole by means of interference fit or screws.

[0163] In some embodiments, the transmission member 32 is rotatably connected to the transmission shaft 31 around a third axis, so that the tilt angle between the first support surface 321 and the first axis L1 is adjustable. The extension direction of the first axis L1 and the extension direction of the mounting shaft 322 are different from the extension direction of the third axis. Therefore, by adjusting the tilt angle between the first support surface 321 and the first axis L1, the distance between the ultrasonic focus of the transducer assembly 200 and the first axis L1 can be adjusted, thereby adjusting the radius of rotation of the ultrasonic focus around the first axis L1, thus enabling the treatment of large or small areas of the skin.

[0164] In some embodiments, the drive shaft 31 is inserted into the transmission member 32 along the first axis L1 to achieve a connection and fixation between the drive shaft 31 and the transmission member 32. Furthermore, to ensure the reliability of the drive shaft 31 installation, the transmission member 32 is configured such that the hole for mounting the drive shaft 31 fits tightly with the drive shaft 31, making it difficult for the drive shaft 31 to be inserted into the transmission member 32 to a sufficient depth during assembly.

[0165] Referring to Figures 8 and 26, in some embodiments, the transmission member 32 is provided with a limiting groove 323 and a clearance groove 324. The clearance groove 324 is located on the side of the limiting groove 323 away from the first support surface 321. Both the limiting groove 323 and the clearance groove 324 penetrate the outer surface of the transmission member 32 to one side to form a mounting opening 325. The clearance groove 324 also penetrates the outer surface of the transmission member 32 on the side away from the limiting groove 323. One end of the transmission shaft 31 has a limiting protrusion 314, and one end of the transmission shaft 31 is disposed in the transmission member 32 through the mounting opening 325, and the limiting protrusion 314 is limited within the limiting groove 323, so that the transmission shaft 31 can drive the transmission member 32 and the transducer assembly 200 to move.

[0166] Therefore, in the actual assembly process, the drive shaft 31 can be moved radially and inserted into the transmission component 32 through the mounting port 325 to complete the installation. This side-insertion assembly method has the advantage of being easy to assemble.

[0167] Thus, by limiting the locating protrusion 314 within the locating groove 323, the transmission connection between the transmission shaft 31 and the transmission component 32 can be achieved through the cooperation between the locating protrusion 314 and the locating groove 323. When the transmission shaft 31 drives the transducer assembly 200 to move through the transmission component 32, the force can be transmitted through the cooperation between the locating protrusion 314 and the locating groove 323, thereby ensuring the connection stability between the transmission component 32 and the transmission shaft 31, thereby improving at least the transmission accuracy in the axial direction of the transmission shaft 31, that is, improving the transmission accuracy of the transmission shaft assembly 300.

[0168] Optionally, the limiting protrusion 314 and the limiting groove 323 are interference-fitted at the limiting position.

[0169] Therefore, in the actual assembly process, the drive shaft 31 can be moved radially and inserted into the transmission component 32 through the mounting port 325 to complete the installation. This side-insertion assembly method has the advantage of being easy to assemble.

[0170] Thus, by limiting the locating protrusion 314 within the locating groove 323, the transmission connection between the transmission shaft 31 and the transmission component 32 can be achieved through the cooperation between the locating protrusion 314 and the locating groove 323. When the transmission shaft 31 drives the transducer assembly 200 to move through the transmission component 32, the force can be transmitted through the cooperation between the locating protrusion 314 and the locating groove 323, thereby ensuring the connection stability between the transmission component 32 and the transmission shaft 31, thereby improving at least the transmission accuracy in the axial direction of the transmission shaft 31, that is, improving the transmission accuracy of the transmission shaft assembly 300.

[0171] For example, when the transducer assembly 200 is driven to move axially upward on the drive shaft 31 by the drive shaft assembly 300 to adjust the working depth of the transducer assembly 200, the limiting protrusion 314 and the limiting groove 323 can achieve zero error (or interference fit) assembly, thereby ensuring and improving the transmission accuracy in the drive shaft 31 axial direction.

[0172] In some embodiments, the transmission member 32 further has a mounting surface 326 and a connecting ring surface 327 connecting the mounting surface 326 and the first support surface 321. A mounting opening 325 is formed in the connecting ring surface 327.

[0173] For example, the limiting groove 323 extends from the connecting ring surface 327 toward the transmission member 32, and the avoidance groove 324 extends from the mounting surface 326 through the limiting groove 323. The avoidance groove 324 also extends through the connecting ring surface 327 on the side where the opening of the limiting groove 323 is located, so as to form a side groove. The side groove and the opening of the limiting groove 323 together form the mounting opening 325.

[0174] Therefore, during the assembly process, the limiting protrusion 314 of the drive shaft 31 can be easily slid into the limiting groove 323 from the mounting port 325, while the part of the drive shaft 31 connected to the limiting protrusion 314 on the side away from the sound output area 111 can be slid into the clearance groove 324 from the side opening of the clearance groove 324, thereby completing the assembly of the drive shaft 31.

[0175] In some embodiments, the width of the limiting groove 323 is greater than the width of the clearance groove 324. Correspondingly, the outer diameter of the limiting protrusion 314 may be greater than the width of the clearance groove 324 to prevent the limiting protrusion 314 from falling out of the clearance groove 324.

[0176] In some embodiments, the height of the limiting groove 323 is smaller than the height of the clearance groove 324. This increases the contact area between the transmission component 32 and the transmission shaft 31, thereby improving installation stability and reliability, and also enhancing structural strength.

[0177] The drive shaft 31 may have a second plane 317 to abut against the inner wall of the clearance groove 324. Thus, when the drive shaft assembly 300 is configured to drive the transducer assembly 200 to rotate about the first axis L1, the second plane 317 can form a driving surface for the drive shaft 31 to drive the transmission member 32 to rotate about the first axis L1. At this time, the height of the clearance groove 324 is greater than the height of the limiting groove 323, resulting in a larger contact area between the second plane 317 and the transmission member 32, thereby improving the torque resistance at the connection between the transmission member 32 and the drive shaft 31.

[0178] Optionally, two second planes 317 are provided, respectively located on both sides of the drive shaft 31 in the circumferential direction.

[0179] Thus, by forming a second plane 317 on the transmission shaft 31 that mates with the inner wall of the clearance groove 324, the transmission accuracy in the rotational direction of the transmission shaft 31 can be ensured and improved.

[0180] In some embodiments, a first guide structure 3231 is provided at the opening of the limiting groove 323 to facilitate the placement of the limiting protrusion 314 into the limiting groove 323.

[0181] For example, the first guide structure 3231 includes a third chamfer. The third chamfer is connected between the inner wall of the limiting groove 323 and the connecting ring surface 327, thereby giving the first guide structure 3231 the advantage of being easy to manufacture.

[0182] In some embodiments, a second guide structure 3241 is provided at the side slot opening, so that the part of the drive shaft 31 connected to the limiting protrusion 314 on the side away from the sound output area 111 can slide from the side slot opening of the avoidance groove 324 into the avoidance groove 324.

[0183] For example, the second guide structure 3241 includes a fourth chamfer, which is connected between the inner wall of the clearance groove 324 and the connecting ring surface 327, thereby giving the second guide structure 3241 the advantage of being easy to manufacture.

[0184] In some embodiments, the transmission member 32 is further provided with a fifth chamfer 3242, which is connected between the inner wall of the recess 324, the mounting surface 326, and the connecting ring surface 327. Thus, during the insertion of the transmission shaft 31 from the mounting port 325, interference between the portion of the transmission shaft 31 protruding from the mounting surface 326 and the connecting ring surface 327 can be avoided, giving the transmission member 32 the advantage of easy installation.

[0185] In some embodiments, a first annular groove 318 is provided on the peripheral side of one end of the drive shaft 31 to form a limiting protrusion 314 at one end of the drive shaft 31.

[0186] That is, a limiting protrusion 314 is formed on the side wall of the first annular groove 318 near the sound output area 111, and the bottom wall of the first annular groove 318 is installed in the clearance groove 324. Furthermore, the bottom wall of the first annular groove 318 may have a second plane 317 formed therein.

[0187] In some implementations, the connecting toroidal surface 327 is a cylindrical surface.

[0188] In some embodiments, the mounting surface 326 and the first support surface 321 are inclined relative to each other, such that at least a portion of the circumferential width of the connecting ring surface 327 is different. The mounting opening 325 is located at the narrower part of the connecting ring surface 327. Thus, by avoiding the creation of mounting holes at the wider part of the connecting ring surface 327, the structural strength of the transmission component 32 can be improved, thereby ensuring the stability and reliability of the connection between the transmission shaft 31 and the transmission component 32.

[0189] In some embodiments, the drive shaft assembly 300 further includes a second fastener 33. The second fastener 33 passes through the drive shaft 31 and the transmission member 32 to connect and fix the drive shaft 31 and the transmission member 32. Furthermore, the second fastener 33 can improve the stability and reliability of the connection between the drive shaft 31 and the transmission member 32.

[0190] For example, a first through hole 3271 is provided at the position of the connecting ring surface 327 corresponding to the clearance groove 324. A second fastener 33 passes through the first through hole 3271 to connect with the drive shaft 31. Then, the second fastener 33 can also restrict the rotation of the transmission member 32 relative to the drive shaft 31 around the first axis L1.

[0191] In some embodiments, the second fastener 33 extends radially along the drive shaft 31 and passes through both the drive shaft 31 and the drive member 32 to lock the drive member 32 and the drive shaft 31. The second fastener 33 can also restrict the rotation of the drive member 32 relative to the drive shaft 31 about the first axis L1.

[0192] In some embodiments, the second fastener 33 is a pin. It is understood that compared to using a screw, a pin offers the advantage of higher installation accuracy. Of course, in other embodiments, the second fastener 33 can also be a screw, rivet, etc., and this application does not limit this.

[0193] In some embodiments, the drive shaft 31 and the drive component 32 can also be connected in other ways. For example, an assembly hole can be provided on the mounting surface 326 of the drive component 32. The assembly hole can be a non-circular hole. One end of the drive shaft 31 is inserted into the assembly hole, and the drive shaft 31 and the drive component 32 are connected and fixed by the second fastener 33 passing through the connecting ring surface 327.

[0194] Referring to Figure 9, in some embodiments, the skin care device further includes a media housing 500, which is at least partially disposed within the outer casing 100. A media chamber 51 is formed between the media housing 500 and the outer casing 100, and a transducer assembly 200 is disposed within the media chamber 51. The media chamber 51 is configured to store an ultrasonic wave transmission medium. Therefore, by using the ultrasonic wave transmission medium, the loss of ultrasonic waves generated by the transducer assembly 200 during the penetration of the waves into the skin to be treated can be reduced, thereby improving the skin care effect.

[0195] It is understood that, on the one hand, the outer shell 100 may form part of the inner wall of the medium chamber 51, or the outer shell 100 may not form the inner wall of the medium chamber 51. This application embodiment does not limit this. On the other hand, the medium shell 500 and the outer shell 100 may be integrally formed or separately formed. This application embodiment does not limit this.

[0196] In some embodiments, a pressure regulating component 600a is provided in the medium chamber 51, which is configured to regulate the pressure within the medium chamber 51. For example, if the ultrasonic transmission medium is a liquid, the ultrasonic transducer 21 will generate heat during operation, and the corresponding ultrasonic transmission medium will undergo thermal expansion and contraction, resulting in dynamic changes in the pressure within the medium chamber 51. In this case, the pressure regulating component 600a can adaptively adjust the pressure within the medium chamber 51 to prevent damage to the acoustic membrane in the medium chamber 51 and / or the transducer assembly 200 and / or the sound output area 111 due to pressure. Furthermore, the movement of the transducer assembly 200 will also cause dynamic changes in the pressure within the medium chamber 51, and the pressure regulating component 600a can adaptively adjust the pressure within the medium chamber 51 in this case.

[0197] The pressure regulating component 600a may include at least one of a pressure regulating valve and an elastic deformation component 600, but this application embodiment does not limit this.

[0198] In some embodiments, the elastic deformation member 600 is at least partially disposed within the medium chamber 51. The elastic deformation member 600 has a deformable cavity 61, which is at least partially located within the medium chamber 51. The deformable cavity 61 also has a communication opening 611 communicating with the outside of the medium chamber 51. Thus, when the pressure inside the medium chamber 51 increases, the elastic deformation member 600 can be compressed, causing the deformable cavity 61 to shrink, and the air inside the deformable cavity 61 is discharged from the communication opening 611.

[0199] For example, referring to Figures 9 and 10 together, the elastic deformation member 600 may include a first top wall 62 and a second annular wall 63. The first top wall 62 is disposed within the medium chamber 51. The second annular wall 63 is at least partially disposed within the medium chamber 51, surrounding the first top wall 62 to form a deformable cavity 61 between the first top wall 62 and the second annular wall 63. A communication opening 611 is located at the end of the deformable cavity 61 opposite to the first top wall 62.

[0200] It is understandable that during the operation of the skin care device, when the pressure inside the medium chamber 51 is too high, the elastic deformation component 600 is prone to excessive deformation, which causes the elastic deformation component 600 to flip out of the medium chamber 51, thereby causing the elastic deformation component 600 to fail.

[0201] Based on this, in some embodiments, the skin care device may further include a first limiting member 64, which is at least partially disposed at the communication opening 611, configured to limit the deformation of the elastic deformable member 600 away from the communication opening 611 to the communication opening 611. This prevents the elastic deformable member 600 from turning outwards from the medium chamber 51, ultimately improving the reliability and stability of the elastic deformable member 600, thereby enhancing its pressure regulation effect.

[0202] For example, the first limiting member 64 may be configured to restrict the deformation of the first top wall 62 to the communicating opening 611, thereby preventing the elastic deformation member 600 from turning outwards to the outside of the medium chamber 51. It should be noted that the first limiting member 64 may be positioned over the communicating opening 611, or one end of the first limiting member 64 may be located within the deformable cavity 61 to restrict the deformation of the first top wall 62 to the communicating opening 611. That is, the elastic deformation member 600 may or may not be inserted into the deformable cavity 61; this embodiment does not limit this.

[0203] For example, the first limiting member 64 is inserted into the communicating opening 611, and a pressure relief through hole 641 is formed between the first limiting member 64 and / or the first limiting member 64 and the second annular wall 63, the pressure relief through hole 641 communicating with the deformable cavity 61. Thus, a separate component can be inserted into the communicating opening 611 to form the first limiting member 64, giving the first limiting member 64 the advantage of easy assembly and facilitating the sealing of the medium chamber 51. Simultaneously, the deformable cavity 61 communicates with the outside through the pressure relief through hole 641 to facilitate the deformation of the elastically deformable component 600.

[0204] In some embodiments, there are multiple pressure relief holes 641, which are arranged circumferentially around the medium chamber 51. This allows for improved pressure regulation within the deformable cavity 61.

[0205] In some embodiments, the shape of the first limiting member 64 is adapted to the shape of the communicating opening 611. For example, the first limiting member 64 is arc-shaped and extends circumferentially around the dielectric chamber 51; correspondingly, the elastic deformation member 600 also has an arc-shaped structure extending circumferentially around the dielectric chamber 51. This avoids the first limiting member 64 being located in the middle of each interference transducer assembly 200 in the dielectric chamber 51.

[0206] It should be noted that, since the elastic deformation component 600 is also an arc-shaped structure that extends circumferentially around the medium chamber 51, it can increase the elastic deformation capacity and support performance of the elastic deformation component 600 to prevent the elastic deformation component 600 from easily deforming; on the other hand, it can also prevent the elastic deformation component 600 from not deforming.

[0207] It is also understandable that, as mentioned above, the transducer assembly 200 can be tilted. In this case, the elastic deformation component 600 can be located on the outer periphery of the end of the transducer assembly 200 away from the sound output area 111. Thus, by tilting the end of the transducer assembly 200 away from the sound output area 111, space can be reserved for installing the elastic deformation component 600, so that the layout in the medium chamber 51 is more compact, which is conducive to the miniaturization design of the skin care device.

[0208] For example, referring to Figures 10 and 27, the elastically deformable member 600 is located on the outer periphery of the transducer assembly 200. The second annular wall 63 includes a first sidewall 631 facing the transducer assembly 200 and a second sidewall 632 facing away from the transducer assembly 200. Both the first sidewall 631 and the second sidewall 632 are arc-shaped sheets surrounding the outer periphery of the transducer assembly 200. The first sidewall 631 is located outside the second sidewall 632, and the width of the first sidewall 631 is greater than the width of the second sidewall 632.

[0209] The second annular wall 63 also includes two third sidewalls 633 located at both ends of the first sidewall 631 and the second sidewall 632, the third sidewalls 633 connecting the first sidewall 631 and the second sidewall 632.

[0210] In some examples, the third sidewall 633 is plate-shaped, and a first edge is formed at the connection between the third sidewall 633 and the first sidewall 631, and a second edge is formed at the connection between the third sidewall 633 and the second sidewall 632. In this way, the support performance of the elastic deformation component 600 can be further improved by utilizing the edges.

[0211] In another example, the third sidewall 633 can also be arc-shaped, with the third sidewall 633 smoothly transitioning to the first sidewall 631 and the third sidewall 633 smoothly transitioning to the second sidewall 632. This can further improve the support performance of the elastic deformation component 600.

[0212] In some embodiments, the first limiting member 64 has a first stop 642 at one end outside the deformable cavity 61. The first stop 642 abuts against the opening end face of the communicating opening 611 to restrict the movement of the first limiting member 64 toward insertion into the deformable cavity 61. Therefore, in actual installation, the first limiting member 64 can be inserted into the deformable cavity 61 from the end opposite to the first stop 642 until the first stop 642 abuts against the opening end face of the communicating opening 611. This gives the first limiting member 64 the advantages of easy installation and high installation accuracy.

[0213] The first limiting member 64 and the elastic deformation member 600 can be bonded and fixed together. For example, the first retaining edge 642 can be bonded and fixed together with the opening end face of the communicating opening 611. This improves the stability and reliability of the installation of the first limiting member 64.

[0214] In some embodiments, the end of the second annular wall 63 facing away from the first top wall 62 is located outside the medium chamber 51 and has a protruding second stop 65. The second stop 65 abuts against the outer wall of the medium chamber 51 to restrict the movement of the first limiting member 64 in the direction of insertion into the medium chamber 51. Therefore, in the actual installation process, the elastic deformation member 600 can be inserted into the deformable cavity 61 first from the first top wall 62 until the second stop 65 abuts against the outer wall of the medium chamber 51, thus giving the elastic deformation member 600 the advantages of easy installation and high installation accuracy.

[0215] Correspondingly, the first retaining edge 642 can abut against the second retaining edge 65, which facilitates positioning during assembly and reduces assembly difficulty.

[0216] In some embodiments, the elastic deformation component 600 is bonded and fixed to the outer wall of the medium chamber 51. For example, the cavity wall of the medium chamber 51 is provided with an assembly through hole adapted to the elastic deformation component 600. The elastic deformation component 600 is at least partially installed into the medium chamber 51 through the assembly through hole. After the elastic deformation component 600 and the first limiting member 64 are installed in place, the first stop 642, the second stop 65 and the outer surface of the medium housing 500 are bonded and fixed simultaneously with adhesive. At the same time, it can also achieve a good sealing effect at the connection between the medium housing 500 and the elastic deformation component 600.

[0217] Optionally, the first limiting member 64 is spaced apart from the inner wall of the deformable cavity 61. For example, the first limiting member 64 may be part of some brackets (such as the second mounting bracket 41, which will be described later) or other components inside the housing 100, thereby reducing the number of parts required for the skin care device.

[0218] In some embodiments, the ratio of the depth of the first limiting member 64 inserted into the deformation cavity 61 to the depth of the deformation cavity 61 is less than or equal to 0.35, thereby avoiding the first limiting member 64 being inserted too deeply into the deformation cavity 61, which would result in the deformation of the elastic deformation member 600 being too small, and thus avoiding insufficient pressure adjustment capability of the elastic deformation member 600.

[0219] For example, the ratio of the depth of the first limiting member 64 inserted into the deformable cavity 61 to the depth of the deformable cavity 61 can be 0.35, 0.34, 0.321, 0.3, 0.27, 0.25, 0.2, 0.194, 0.19, 0.15, 0.1, or 0.5, etc., and the embodiments of this application do not limit this.

[0220] In some embodiments, the thickness of the second annular wall 63 is less than the thickness of the first top wall 62. Therefore, when the pressure inside the medium chamber 51 increases, the elastic deformation component 600 can deform first from the second annular wall 63, thereby preventing the first top wall 62 from deforming to the connecting opening 611. This prevents the elastic deformation component 600 from turning out of the medium chamber 51, ultimately improving the reliability and stability of the elastic deformation component 600 and enhancing its pressure regulation effect.

[0221] For example, the thickness of the second annular wall 63 is 0.4 mm to 0.7 mm. For instance, the thickness of the second annular wall 63 can be 0.4 mm, 0.44 mm, 0.45 mm, 0.47 mm, 0.5 mm, 0.514 mm, 0.55 mm, 0.6 mm, 0.67 mm, or 0.7 mm; this embodiment of the application does not limit the thickness. The thickness of the first top wall 62 is 0.7 mm to 1.1 mm. For instance, the thickness of the first top wall 62 can be 0.7 mm, 0.75 mm, 0.8 mm, 0.85 mm, 0.897 mm, 0.9 mm, 0.97 mm, 1 mm, 1.07 mm, or 1.1 mm; this embodiment of the application does not limit the thickness. Therefore, it can avoid the first top wall 62 and the second ring wall 63 being too thick, which would make the elastic deformation component 600 difficult to deform, and it can also avoid the first top wall 62 and the second ring wall 63 being too thin, which would make the elastic deformation component 600 too easy to deform; it can also ensure that the thickness of the second ring wall 63 is less than the thickness of the first ring wall 532.

[0222] In some embodiments, the first top wall 62 is a flat plate structure, which can improve the strength of the first top wall 62 compared to a corrugated plate structure, thereby reducing the probability that the elastic deformation component 600 will flip out of the medium chamber 51.

[0223] In some embodiments, at least one surface of the second annular wall 63 and the first top wall 62 is a smooth surface. This can also be understood as the surface of at least one of the second annular wall 63 and the first top wall 62 being wrinkle-free. This can, to some extent, increase the strength of the corresponding second annular wall 63 and / or first top wall 62, thereby allowing the elastic deformation component 600 to deform more slowly. This prevents violent oscillations in the ultrasonic wave transmission medium within the medium chamber 51, thereby improving the stability and reliability of the skin care device.

[0224] In some embodiments, the Shore hardness coefficient of the elastic deformation component 600 is 40-60 HR. This can improve the strength of the elastic deformation component 600 to a certain extent, thereby allowing the deformation rate of the elastic deformation component 600 to be slower, preventing violent oscillations in the ultrasonic wave transmission medium within the medium chamber 51, and thus improving the stability and reliability of the skin care device.

[0225] For example, the Shore hardness coefficient of the elastic deformation component 600 is 40HR, 42.5HR, 45HR, 47HR, 49.7HR, 50HR, 52HR, 55HR, 57.8HR, 59HR or 60HR, and the embodiments of this application do not limit it.

[0226] In some embodiments, the elastic deformation component 600 is a rubber or silicone component. Of course, the elastic deformation component 600 can also be made of any other deformable material, and this application embodiment does not limit this.

[0227] It is also understood that, as mentioned above, the drive shaft assembly 300 may include a drive shaft 31 passing through the medium housing 500. The drive shaft 31 may move along the first axis L1 to drive the transducer assembly 200 to move along the first axis L1, thereby moving closer to or away from the sound output area 111.

[0228] For example, the drive shaft assembly 300 includes a drive member 32 and a drive shaft 31, one end of which extends into the medium chamber 51, and the drive member 32 is mounted on the end of the drive shaft 31 that extends into the medium chamber 51. A first support surface 321 is provided on the side of the drive member 32 away from the drive shaft 31. The transducer assembly 200 is mounted on the first support surface 321.

[0229] When the depth of the drive shaft 31 inserted into the medium housing 500 changes, the pressure in the medium chamber 51 also changes accordingly. At this time, the pressure regulating component 600a (or the elastic deformation component 600) can effectively regulate the pressure in the medium chamber 51.

[0230] For example, the skin care device is configured to have at least two preset depth modes, in which the drive shaft assembly 300 is inserted into the medium chamber 51 to different depths, such that the volume of the portion of the drive shaft assembly 300 inserted into the medium chamber 51 is different.

[0231] In all depth modes, the difference between the maximum and minimum volumes of the drive shaft assembly 300 inserted into the medium chamber 51 is V1, and the volume of the deformable cavity 61 is V2. V2 is greater than or equal to V1 to ensure that the elastic deformation component 600 has a sufficiently large deformable cavity 61.

[0232] In some embodiments, the ratio of V1 to V2 can be 3-10, thereby ensuring that the elastic deformation member 600 has a sufficiently large deformation cavity 61. For example, the ratio of V1 to V2 can be 3, 3.4, 3.5, 4, 4.1, 4.97, 5.5, 5.9, 6, 6.12, 6.3, 6.4, 6.5, 7, 7.9, 8.5, 9, or 10.

[0233] In some embodiments, the ratio of V1 to V2 is 5.5-6.5. This avoids the situation where the deformable cavity 61 is too small, resulting in insufficient space for the elastic deformation component 600 to be compressed when the drive shaft 31 is inserted to the maximum depth of the medium chamber 51 and the ultrasonic transmission medium expands due to heat. It also avoids the situation where the deformable cavity 61 is too large, resulting in excessive space occupied in the medium chamber 51 and insufficient support performance.

[0234] In some embodiments, the skin care device further includes a second mounting bracket 41, on which one end of the drive shaft assembly 300 located outside the media chamber 51 is mounted.

[0235] In some embodiments, the first limiting member 64 can be disposed on the second mounting bracket 41, thereby reusing the second mounting bracket 41 to form the first limiting member 64, thereby reducing the number of parts in the skin care device and facilitating the assembly of the skin care device.

[0236] As shown in Figure 9, in some embodiments, the wall of the medium chamber 51 is provided with a window 521 located at the sound emission area 111. The skin care device also includes an acoustic membrane 54 covering the window 521 to seal it. The ultrasonic focus of the transducer assembly 200 passes through the window 521 and is configured to be directed into the skin to be treated. Thus, by adjusting the pressure inside the medium chamber 51 by the pressure regulating member 600a, the rupture of the acoustic membrane 54 can also be avoided.

[0237] In some embodiments, the acoustic membrane 54 is fixed only to the open end face of the window 521, resulting in low installation reliability of the acoustic membrane 54, which in turn affects the sealing effect of the medium chamber 51.

[0238] Please refer to Figures 9 and 11 together. Based on this, in some embodiments, the sidewall (i.e., cavity wall) forming the medium chamber 51 includes a second top wall 522 and a third annular wall 523 surrounding the second top wall 522. The second top wall 522 is located on the side of the transducer assembly 200 facing the sound output region 111. The second top wall 522 is provided with a window 521, which is a through hole facing the transducer assembly 200. The sound-permeable membrane 54 includes a sealing part 541 and a plurality of fixing parts 542. The sealing part 541 is fixed to the second top wall 522 to close the window 521. The plurality of fixing parts 542 are arranged circumferentially along the sealing part 541. Each fixing part 542 is bent and connected to the outer edge of the sealing part 541 and fixed to the third annular wall 523.

[0239] Therefore, the sound-permeable membrane 54 forms a seal with the second top wall 522 through the sealing part 541, and the connection area of ​​the sound-permeable membrane 54 is increased by multiple fixing parts 542, which can increase the connection and mating area of ​​the sound-permeable membrane 54, thereby improving the sealing effect of the sound-permeable membrane 54. On this basis, in the actual manufacturing process, multiple sheet-like structures can be cut out from the periphery of the sealing part 541 and then bent to form the fixing parts 542, so that the sound-permeable membrane 54 has the advantage of being easy to manufacture. It can be seen that the sound-permeable membrane 54 of the present application embodiment can improve the sealing effect at the window 521 of the medium chamber 51 while meeting the actual working requirements of being easy to manufacture.

[0240] In some embodiments, at least one fixing part 542 is overlapped with an adjacent fixing part 542 along one end edge of the third annular wall 523 in the circumferential direction. This allows all portions of the third annular wall 523 in the circumferential direction to be connected and fixed to the fixing part 542 as much as possible, thereby improving the stability and reliability of the connection.

[0241] In some embodiments, the fixing part 542 and the third annular wall 523 are connected and fixed by at least one of the following methods: bonding, hot pressing, ultrasonic welding and fusion welding; and / or, the sealing part 541 and the second top wall 522 are connected and fixed by at least one of the following methods: bonding, hot pressing, ultrasonic welding and fusion welding.

[0242] In some embodiments, both the second top wall 522 and the sealing portion 541 are circular, and the outer diameter of the second top wall 522 is smaller than the outer diameter of the sealing portion 541; and / or, the outer edge of the sealing portion 541 protrudes from the outer periphery of the second top wall 522.

[0243] This improves the stability of the connection between the second top wall 522 and the sealing part 541. It is also understood that when the second top wall 522 and the sealing part 541 are bonded, an overflow groove can be formed between the portion of the sealing part 541 protruding from the outer side of the second top wall 522 and the third annular wall 523 to accommodate excess adhesive squeezed out between the second top wall 522 and the sealing part 541. This allows the sealing part 541 to be bonded more smoothly to the second top wall 522, thereby improving the stability and reliability of the bond.

[0244] For example, the difference between the outer diameter of the second top wall 522 and the outer diameter of the sealing part 541 can be 1 mm to 2 mm.

[0245] In some embodiments, the sealing part 541 is located on the side of the second top wall 522 away from the medium chamber 51, and the side of the sealing part 541 facing the second top wall 522 is provided with an ink layer 543. The ink layer 543 is arranged around the window 521, so that the ink layer 543 can achieve a better decorative effect.

[0246] In some embodiments, the inner diameter of the inner peripheral edge of the ink layer 543 is smaller than the inner diameter of the window 521; and / or, the inner peripheral edge of the ink layer 543 protrudes beyond the inner peripheral side of the inner wall of the window 521. Thus, the ink layer 543 can provide better coverage of the outer edge of the inner wall of the window 521, thereby improving the aesthetics of the skin care device.

[0247] In some embodiments, the sealing rating between the acoustic membrane 54 and the second top wall 522 is IP68, thereby making the seal at the acoustic membrane 54 more reliable.

[0248] In some embodiments, the sound-emitting region 111 includes a first sound-emitting hole 1111, and the dielectric housing 500 has a second top wall 522 and a third annular wall 523. The second top wall 522 is disposed within the first sound-emitting hole 1111, and the fixing part 542 is fixed between the hole wall of the first sound-emitting hole 1111 and the third annular wall 523. Therefore, the fixing part 542 can be clamped between the hole wall of the first sound-emitting hole 1111 and the third annular wall 523 to improve the stability of the connection of the fixing part 542.

[0249] In some embodiments, a sealant is provided between the third annular wall 523 and the inner wall of the outer casing 100, which can improve the sealing effect between the third annular wall 523 and the inner wall of the outer casing 100, and also improve the stability of the connection of the fixing part 542.

[0250] In some embodiments, the medium housing 500 includes a first housing 52 and a second housing 53. The first housing 52 and the second housing 53 enclose and form a medium chamber 51, thereby making the forming of the medium chamber 51 more convenient.

[0251] For example, the first housing 52 has a second top wall 522 and a third annular wall 523. The second housing 53 is connected to the third annular wall 523 to form a medium chamber 51 between the second top wall 522, the third annular wall 523 and the second housing 53.

[0252] It is also understandable that during the process of the drive component 400 driving the transducer component 200 to move, the ultrasonic transducer 21 is prone to collisions.

[0253] Please refer to Figures 9 and 12 together. Based on this, in some embodiments, the sidewall (i.e., cavity wall) forming the medium chamber 51 is also provided with a window 521 located in the sound output area 111. The window 521 is a through hole facing the transducer assembly 200. A first chamfer 5211 is provided at one end of the inner sidewall of the window 521 near the transducer assembly 200.

[0254] It is understandable that, in order to facilitate the transmission of ultrasound waves from the transducer assembly 200 into the skin to be treated, and to reduce losses, the transducer assembly 200 is usually located near the window 521. Therefore, a first chamfer 5211 is provided on the inner wall of the window 521. On the one hand, this can prevent the transducer assembly 200 from colliding with the inner wall of the window 521 during its movement. On the other hand, it can also facilitate miniaturization design.

[0255] In some embodiments, the transducer assembly 200 includes an ultrasonic transducer 21 facing the window 521, and the peripheral surface of the ultrasonic transducer 21 has a second chamfer 212 at the end near the window 521. This reduces the probability of the end of the peripheral surface of the ultrasonic transducer 21 near the window 521 colliding with the window 521.

[0256] In some embodiments, the orthographic projection of the second chamfer 212 along the central axis of window 521 is at least partially located within the orthographic projection of the first chamfer 5211. Therefore, the focused ultrasound generated by the ultrasonic transducer 21 can be emitted from window 521 as much as possible to improve the skin care effect. Correspondingly, it is even more necessary for the first chamfer 5211 and the second chamfer 212 to reduce the probability of the transducer assembly 200 colliding with window 521 during its movement.

[0257] It should be noted that the central axis of window 521 may coincide with, intersect with or be parallel to the first axis L1, and this embodiment of the application does not limit this.

[0258] In some embodiments, the first chamfer 5211 is a straight chamfer to form a first chamfered surface, and the angle between the first chamfered surface and the central axis of the window 521 is 10 degrees to 40 degrees, thereby reducing the probability of the transducer assembly 200 colliding with the window 521 during its movement. For example, the angle between the first chamfered surface and the central axis of the window 521 can be 10 degrees, 15 degrees, 15 degrees, 20 degrees, 27 degrees, 30 degrees, 32.7 degrees, 35 degrees, or 40 degrees, and this application embodiment does not limit this.

[0259] In some embodiments, the second chamfer 212 is a straight chamfer to form a second chamfered surface. The angle between the second chamfered surface and the central axis of the transducer assembly 200 is 10 degrees to 40 degrees, thereby reducing the probability of the transducer assembly 200 colliding with the window 521 during its movement. For example, the angle between the second chamfered surface and the central axis of the transducer assembly 200 can be 10 degrees, 15 degrees, 15 degrees, 20 degrees, 27 degrees, 30 degrees, 32.7 degrees, 35 degrees, or 40 degrees. This application does not limit this.

[0260] In some embodiments, the housing 100 includes an abutment section 112 and a transition section 113. The abutment section 112 is connected to one end of the transition section 113 along the length direction of the housing 100. The abutment section 112 is columnar. A working area 111a is provided on the side end face of the abutment section 112 opposite to the transition section 113. The transition section 113 is conical. Along the direction close to the abutment section 112, the cross-sectional area of ​​the transition section 113 is reduced.

[0261] Therefore, by gradually narrowing the transition section 113, the cross-sectional area of ​​the contact end can be reduced, so that the working area 111a on the contact section 112 can be more accurately fitted to the skin to be treated; at the same time, since the transition section 113 is tapered, the transition section 113 will obstruct the user's line of sight less.

[0262] In some embodiments, the length of the abutment section 112 along the length direction of the housing 100 is 5 to 15 millimeters. For example, the length of the abutment section 112 along the length direction of the housing 100 is 5 millimeters, 5.5 millimeters, 6.5 millimeters, 7 millimeters, 8.9 millimeters, 9.44 millimeters, 10 millimeters, 11 millimeters, 12.3 millimeters, 13 millimeters, 14.55 millimeters, or 15 millimeters, and this application embodiment does not limit this. Thus, it is possible to avoid the abutment section 112 being too long, resulting in insufficient internal space at the end of the housing where the abutment section 112 is located, making it impossible to install the skin care component 200a, the drive shaft assembly 300, and the drive assembly 400, etc.

[0263] In some embodiments, the length of the transition section 113 along the length direction of the housing 100 is 5 to 15 millimeters. For example, the length of the transition section 113 along the length direction of the housing 100 is 5 millimeters, 5.5 millimeters, 6.5 millimeters, 7 millimeters, 8.9 millimeters, 9.44 millimeters, 10 millimeters, 11 millimeters, 12.3 millimeters, 13 millimeters, 14.55 millimeters, or 15 millimeters, and this application embodiment does not limit this. Thus, it is possible to avoid the transition section 113 being too long, resulting in insufficient internal space at the end of the housing where the transition section 113 is located, making it impossible to install the skin care component 200a, the drive shaft assembly 300, and the drive assembly 400, etc.

[0264] In some embodiments, the ratio of the length of the abutment section 112 to the length of the transition section 113 along the length direction of the outer casing 100 is 0.85-1.15. That is, the length of the abutment section 112 and the length of the transition section 113 can be approximately the same.

[0265] In some embodiments, the dielectric chamber 51 is partially located inside the abutment section 112 and the transition section 113, and the transducer assembly 200 is partially located inside the abutment section 112 and the transition section 113. Therefore, the space in the dielectric chamber 51 near the window 521 is smaller, which makes the first chamfer 5211 and the second chamfer 212 more necessary to reduce the probability of the transducer assembly 200 colliding with the window 521 during its movement.

[0266] In some embodiments, the drive assembly 400 includes at least one of a first drive assembly and a second drive assembly. The first drive assembly is drivenly connected to the transducer assembly 200 and configured to drive the transducer assembly 200 to move along a first axis L1. The second drive assembly is drivenly connected to the transducer assembly 200 and configured to drive the ultrasonic focal point of the transducer assembly 200 to rotate about the first axis L1. The first axis L1 is the central axis of the window 521. Thus, by providing a first chamfer 5211 and a second chamfer 212, collisions between the transducer assembly 200 and the inner wall of the window 521 can be avoided when the first drive assembly and / or the second drive assembly drives the transducer assembly 200 to move.

[0267] In some embodiments, the window 521 may be formed by the dielectric housing 500. For example, the sound-emitting region 111 includes a first sound-emitting hole 1111 disposed in the outer casing 100, the dielectric housing 500 passes through the first sound-emitting hole 1111, and the window 521 is provided on one side of the dielectric housing 500 located within the sound-emitting region 111. The dielectric housing 500 also includes a sound-permeable membrane 54, which covers the window 521 to seal it. Of course, in some embodiments, the outer casing 100 may also have a window 521 formed therein; this application does not limit this aspect.

[0268] As mentioned above, in some embodiments, the medium housing 500 may include a first housing 52 and a second housing 53. However, leakage can easily occur between the first housing 52 and the second housing 53.

[0269] Based on this, in some embodiments, the medium housing 500 further includes a first sealing ring 55. The first housing 52 is provided with a first sealing groove 524, and the second housing 53 includes a second bottom wall 531 and a first annular wall 532 surrounding the second bottom wall 531. The side edge of the first annular wall 532 opposite to the second bottom wall 531 is inserted into the first sealing groove 524 to form a medium chamber 51 between the second bottom wall 531, the first annular wall 532, and the first housing 52. The first sealing ring 55 is sandwiched between the inner wall of the first sealing groove 524 and the first annular wall 532, and the first sealing ring 55 extends at least from the inner circumferential side of the first annular wall 532 to the outer circumferential side of the first annular wall 532 to seal the connection between the first housing 52 and the second housing 53.

[0270] Since the first sealing ring 55 extends from at least the inner circumference of the first annular wall 532 to the outer circumference of the first annular wall 532, the contact area between the first sealing ring 55 and the first annular wall 532 can be increased, thereby improving the sealing effect.

[0271] In some embodiments, the depth to which the first annular wall 532 is inserted into the first sealing groove 524 is greater than the thickness of the portion of the first annular wall 532 inserted into the first sealing groove 524, thereby making the depth of the first annular wall 532 inserted into the first sealing groove 524 larger, so as to increase the sealing area of ​​the first sealing ring 55.

[0272] For example, the dimension of the first sealing ring 55 in the depth direction of the first sealing groove 524 is greater than the thickness of the portion of the first annular wall 532 inserted into the first sealing groove 524. Thus, by increasing the sealing area of ​​the first sealing ring 55, the sealing effect of the first sealing ring 55 can be improved.

[0273] In some embodiments, the first annular wall 532 includes a first sub-annular wall 5321 and a second sub-annular wall 5322. The first sub-annular wall 5321 is inserted into the first sealing groove 524, and the second sub-annular wall 5322 is connected between the first sub-annular wall 5321 and the second bottom wall 531. The thickness of the first sub-annular wall 5321 is less than the thickness of the second sub-annular wall 5322. This improves the structural strength at the second sub-annular wall 5322.

[0274] Referring to Figures 9, 12, and 13, in some embodiments, the outer peripheral surface of the second sub-ring wall 5322 is provided with a first snap-fit ​​protrusion 525, the first housing 52 is provided with a first snap-fit ​​533, the first snap-fit ​​protrusion 525 is provided with a first snap-fit ​​hole, and the first snap-fit ​​533 snaps into the first snap-fit ​​hole. Thus, the first snap-fit ​​533 can increase the connection stability at the junction of the first housing 52 and the second housing 53, thereby improving the sealing effect.

[0275] The number of first snap-fits 533 can be multiple, and the multiple first snap-fits 533 are arranged at intervals along the circumference of the second sub-annular wall 5322. Thus, the connection stability at the connection between the first housing 52 and the second housing 53 can be improved by using multiple first snap-fits 533, thereby improving the sealing effect.

[0276] In some embodiments, a threaded portion 534 is provided on the outer periphery of the second sub-annular wall 5322. The threaded portion 534 is fixedly connected to the inner wall of the outer casing 100, thereby making the installation of the medium casing 500 more stable and reliable.

[0277] The number of screw connections 534 can be multiple, and multiple screw connections 534 are arranged circumferentially along the second sub-ring wall 5322, thereby making the installation of the medium housing 500 more stable and reliable.

[0278] In some embodiments, the sound-emitting region 111 includes a first sound-emitting hole 1111, the first housing 52 is at least partially located within the sound-emitting region 111, and the second bottom wall 531 of the second housing 53 is located on the side of the transducer assembly 200 opposite to the sound-emitting region 111.

[0279] For example, as mentioned above, the first housing 52 may include a second top wall 522 and a third annular wall 523. The first housing 52 may also include a mounting portion 526, which protrudes from the outer periphery of the end of the third annular wall 523 opposite to the second top wall 522, and a first sealing groove 524 is provided on the side of the mounting portion 526 opposite to the sound output area 111.

[0280] In some embodiments, the mounting portion 526 has a first positioning groove 5261 on the side facing the sound-emitting area 111, and the inner wall of the outer casing 100 has a first positioning protrusion 114, which engages with the first positioning groove 5261. Thus, the first positioning protrusion 114 and the first positioning groove 5261 enable rapid positioning of the medium housing 500 and the outer casing 100, and improve the connection stability and reliability between the medium housing 500 and the outer casing 100.

[0281] For example, the mounting part 526 has at least two sets of positioning ribs 5262 protruding on one side surface facing the sound output area 111, and each set of positioning ribs 5262 includes two spaced positioning ribs 5262 to separate the first positioning groove 5261.

[0282] In some embodiments, at least two sets of positioning ribs 5262 are spaced apart circumferentially along the third annular wall 523, such that a trace space 5263 is formed between adjacent sets of positioning ribs 5262. The fifth circuit board, as will be described later, can then be routed through this trace space 5263.

[0283] In some embodiments, the third annular wall 523 may include a third sub-annular wall 5231 and a fourth sub-annular wall 5232. The third sub-annular wall 5231 is connected to the second top wall 522, and is columnar and at least partially located inside the abutment section 112. The fourth sub-annular wall 5232 is connected to the end of the third sub-annular wall 5231 opposite to the second top wall 522, and is tapered. The cross-sectional area of ​​the fourth sub-annular wall 5232 is reduced along the direction close to the third sub-annular wall 5231, and is located inside the transition section 113. This allows the shape of the medium housing 500 to be adapted to the abutment section 112 and the transition section 113, so as to fully utilize the space inside the abutment section 112 and the transition section 113 to create a larger medium chamber 51.

[0284] In some embodiments, the mounting part 526 is provided with a first positioning groove 5261 on the side facing the sound output area 111, and the inner wall of the transition section 113 is provided with a first positioning protrusion 114, which is engaged in the first positioning groove 5261.

[0285] In some embodiments, the inner wall of the medium chamber 51 is also provided with a liquid injection hole communicating with the outside, and a sealing plug is provided in the liquid injection hole. Therefore, when injecting ultrasonic transmission medium into the medium chamber 51, the pressure inside the medium chamber 51 can also be adjusted by the pressure regulating component 600a.

[0286] Optionally, the injection hole can be located on the annular sidewall of the media chamber 51; this can reduce the risk of collision with the sealing plug during assembly. Furthermore, a protective ring protrusion is provided on the annular sidewall around the injection hole, and the sealing plug is located inside the protective ring protrusion, so that the protective ring protrusion can protect the sealing plug to prevent the sealing plug from accidentally falling off.

[0287] Furthermore, the injection hole is located at one end of the annular sidewall near the bottom wall of the medium chamber 51, which can prevent excessive air bubbles from being generated during injection. For example, in the above embodiment, the annular sidewall of the medium chamber 51 includes a first annular wall 532 and a third annular wall 523, and the bottom wall of the medium chamber 51 is a second bottom wall 531; the injection hole can be located at one end of the first annular wall 532 near the second bottom wall 531.

[0288] As mentioned above, in some embodiments, the skin care device further includes a first electrical connection line 23, one end of which is connected to a first electrical connection terminal 211. The other end of the first electrical connection line 23 passes through the inner wall (i.e., the cavity wall) of the media chamber 51 (e.g., the media housing 500). This allows the skin care device to supply power to the transducer assembly 200 from outside the media chamber 51.

[0289] In some embodiments, the medium housing 500 is further provided with a second mounting hole 535, within which the drive shaft 31 of the drive shaft assembly 300 is movably and sealingly mounted. For example, the drive shaft assembly 300 includes a drive shaft 31 and a second seal 34. The drive shaft 31 is movably and sealingly mounted in the second mounting hole 535 via the second seal 34, allowing one end of the drive shaft 31 to extend into the medium chamber 51. This prevents leakage at the second mounting hole 535.

[0290] Correspondingly, the transducer assembly 200 is installed at one end of the drive shaft 31 located within the medium chamber 51. Therefore, during the long-term movement of the drive shaft 31 to drive the transducer assembly 200, the second seal 34 is prone to wear, resulting in a gap between the second seal 34 and the peripheral surface of the drive shaft 31.

[0291] Based on this, in some embodiments, the second seal 34 is sealed between the inner wall of the second mounting hole 535 and the peripheral surface of the drive shaft 31. The second seal 34 includes an inner ring seal portion 341 disposed around the drive shaft 31. The inner ring seal portion 341 is elastic to fit tightly against the peripheral surface of the drive shaft 31, and / or, the second seal 34 also includes an elastic member 342, which is configured to drive the inner ring seal portion 341 to fit tightly against the peripheral surface of the drive shaft 31.

[0292] Therefore, even if the inner ring seal 341 wears out after the drive shaft assembly 300 has been in operation for a long time, the elasticity of the elastic element 342 or the inner ring seal 341 itself can still make the inner ring seal 341 fit tightly against the peripheral surface of the drive shaft assembly 300, thereby improving the situation where the drive shaft 31 is prone to leakage.

[0293] When the second seal 34 includes an elastic member 342, the elastic member 342 can be sleeved on the outer periphery of the inner ring seal portion 341, so that the elastic member 342 can apply force to each position of the inner ring seal portion 341 in the circumferential direction, so that each position of the inner ring seal portion 341 in the circumferential direction is tightly attached to the circumferential surface of the drive shaft 31.

[0294] For example, the elastic element 342 can be a ring spring or a ring telescopic element (such as a ring telescopic rope or a ring telescopic tube, etc.).

[0295] In some embodiments, the second seal 34 further includes an outer ring seal 343 and a first bottom wall 344, the outer ring seal 343 abutting against the wall of the second mounting hole 535. The first bottom wall 344 is annular, with its inner edge connected to the inner ring seal 341 and its outer edge connected to the outer ring seal 343. Thus, the inner ring seal 341, the first bottom wall 344, and the outer ring seal 343 seal the gap between the wall of the second mounting hole 535 and the peripheral surface of the drive shaft 31.

[0296] In some embodiments, the outer ring sealing portion 343 is installed in the second mounting hole 535 by interference fit, thereby improving the sealing effect at the second mounting hole 535.

[0297] In some embodiments, the outer ring sealing portion 343 includes a rigid support ring and an outer sealing portion disposed outside the rigid support ring. The outer sealing portion is connected to the first bottom wall 344, thereby improving the strength of the outer ring sealing portion 343 and improving the sealing effect at the second mounting hole 535.

[0298] The rigid support ring can be made of metal or any other material with a hardness greater than that of the outer sealing part; this application does not limit this. The outer sealing part can be made of a material with good sealing properties, such as rubber or silicone.

[0299] In some embodiments, a mounting groove is formed between the inner ring seal 341, the first bottom wall 344, and the outer ring seal 343. The elastic member 342 can be accommodated within the mounting groove.

[0300] In some embodiments, the first bottom wall 344 is connected to the end of the inner ring sealing portion 341 facing away from the medium chamber 51 and the end of the outer ring sealing portion 343 facing away from the medium chamber 51, respectively. This prevents the elastic element 342 from disengaging from the mounting groove at the end of the second mounting hole 535 facing away from the medium chamber 51, thereby improving the stability and reliability of the elastic element 342 installation.

[0301] In some embodiments, the second mounting hole 535 is a stepped hole, and the inner wall of the second mounting hole 535 includes a stepped surface 5351 facing the outside of the medium chamber 51, and the opening of the mounting groove faces the stepped surface 5351. The stepped surface 5351 can prevent the elastic element 342 from falling into the medium chamber 51.

[0302] For example, a surface protrusion 5352 is provided on the side of the medium housing 500 opposite to the medium chamber 51. A second mounting hole 535 is provided through the surface protrusion 5352, thereby forming a stepped hole. For example, the surface protrusion 5352 may be an annular protrusion surrounding the drive shaft 31.

[0303] In some embodiments, the skin care device further includes a second mounting bracket 41 located outside the media chamber 51. The drive assembly 400 is mounted on the second mounting bracket 41.

[0304] In some examples, the second mounting bracket 41 may be connected to the housing 100 and / or the media housing 500.

[0305] In some embodiments, the second mounting bracket 41 is provided with a third mounting hole 411, through which the drive shaft 31 passes and is clearance-fitted with the third mounting hole 411.

[0306] The second mounting bracket 41 also covers the opening of the second mounting hole 535 on the side opposite to the medium chamber 51, to prevent the second seal 34 from disengaging from the second mounting hole 535 in the direction opposite to the medium chamber 51. Thus, the engagement of the stepped surface 5351 and the second mounting bracket 41 prevents the second seal 34 from disengaging from the second mounting hole 535. Furthermore, reusing the second mounting bracket 41 to limit the position of the second seal 34 reduces material usage and assembly steps.

[0307] For example, the second mounting bracket 41 is provided with a second annular protrusion 412 facing the side of the second seal 34 away from the medium chamber 51, so as to restrict the second seal 34 from disengaging from the second mounting hole 535 in the direction away from the medium chamber 51.

[0308] In some embodiments, lubricating oil is also provided in the second mounting hole 535 to form an oil seal, thereby improving the sealing effect at the second mounting hole 535.

[0309] For example, the lubricating oil may be at least partially disposed within the mounting groove. It is also understood that the elastic element 342 may not be disposed within the mounting groove; this embodiment of the application does not limit this.

[0310] In some embodiments, the drive assembly 400 may be disposed outside the media chamber 51. The drive assembly 400 may include at least one of a first drive assembly 42 and a second drive assembly 43. The first drive assembly 42 is drivenly connected to the drive shaft 31 to drive the drive shaft 31 to move along the first axis L1. The second drive assembly 43 is drivenly connected to the drive shaft 31 to drive the drive shaft 31 to rotate about the first axis L1. Thus, automatic adjustment can be achieved through the corresponding first drive assembly 42 and / or second drive assembly 43, thereby improving the motion accuracy of the drive shaft assembly 300 and enhancing the skin care effect.

[0311] It should be noted that the skin care device may also omit the media housing 500. That is, the drive shaft assembly 300 includes a drive shaft 31 movably disposed within the housing 100, the drive shaft 31 extending along the first axis L1, and the drive assembly 400 includes a first drive assembly 42 and a second drive assembly 43. In this case, the skin care device may or may not have a media housing 500, and this embodiment does not limit this.

[0312] Referring to Figure 14, in the first positional relationship between the first drive assembly 42 and the second drive assembly 43, the first drive assembly 42 is located between the second drive assembly 43 and the transducer assembly 200. Compared to the first drive assembly 42 and the second drive assembly 43 being located in the same area along the first axis L1 of the drive shaft 31, this embodiment places the first drive assembly 42 and the second drive assembly 43 at different positions along the first axis L1 of the drive shaft 31. This allows the skin care device to be made thinner at various points along the first axis L1, thereby allowing the outer casing 100 to be made thinner for easier gripping. In other words, since the first drive assembly 42 and the second drive assembly 43 are both located on the same side of the transducer assembly 200, the skin care device can also be made thinner at various points along the axial direction of the drive shaft 31, thus achieving a miniaturized design. Furthermore, the first drive assembly 42 being located between the second drive assembly 43 and the transducer assembly 200 can also improve the stability and reliability of the installation of the first drive assembly 42 and the second drive assembly 43.

[0313] For example, the peripheral side of the drive shaft 31 is provided with a drive position 315, which is located between the medium housing 500 and the second drive assembly 43. For example, the drive position 315 is located in the middle of the drive shaft 31. The first drive assembly 42 and the drive shaft 31 form a transmission connection at the drive position 315, so that the first drive assembly 42 can drive the drive shaft 31 to move along the first axis L1, and allow the drive shaft 31 to rotate about the first axis L1.

[0314] For example, the first drive assembly 42 includes a pusher 421, which is connected to the drive position 315 in a separable manner through magnetic connection, negative pressure adsorption, clutch assembly, etc., so that the pusher 421 can move along the first axis L1 to push the drive shaft 31 to move along the first axis L1, and the drive shaft 31 can also rotate relative to the pusher 421 about the first axis L1.

[0315] Of course, the pusher 421 can also cooperate with the drive position 315 in other ways. For example, referring to Figure 15, the drive position 315 may include an annular transmission groove on the outer periphery of the transmission shaft 31. The pusher 421 is rotatably engaged in the transmission groove relative to the transmission shaft 31 to form a transmission connection. Thus, since the pusher 421 is partially engaged in the transmission groove, when the pusher 421 moves along the first axis L1, it can push the groove wall of the transmission groove, so that the transmission shaft 31 moves along the first axis L1; at the same time, since the pusher 421 is rotatably arranged relative to the transmission shaft 31, the transmission shaft 31 can also rotate around the first axis L1, so that the pusher 421 is engaged at different circumferential positions in the transmission groove, thereby avoiding interference between the rotation of the pusher and the transmission shaft 31.

[0316] In some embodiments, the first drive assembly 42 further includes a first motor 422, which is configured to drive the drive shaft 31 to move along the axial direction (i.e., the direction of the first axis L1) via a pusher 421.

[0317] For example, the pusher 421 includes a push connecting portion 4211 and two push arms 4212. One end of the push connecting portion 4211 is connected to the output shaft of the first motor 422, and the two push arms 4212 are connected to the other end of the push connecting portion 4211. The two push arms 4212 are respectively located on opposite sides of the transmission shaft 31, and are respectively engaged in the transmission groove. Thus, by cooperating with the transmission groove, the stability and reliability of the connection between the pusher 421 and the transmission shaft 31 can be improved.

[0318] In some embodiments, the first drive assembly 42 further includes a lead screw module 423, which includes a lead screw 4231 and a lead screw nut 4232 screwed onto the lead screw 4231. The lead screw nut 4232 is connected to the push connection part 4211, and the lead screw 4231 is drively connected to the output shaft of the first motor 422. Therefore, the lead screw module 423 can improve the accuracy of the first motor 422 driving the pusher 421 to move.

[0319] It should be noted that the lead screw nut 4232 and the push connection part 4211 can be integrally formed or separately formed, and this application embodiment does not limit this.

[0320] In some embodiments, the first drive assembly 42 further includes a gear reduction module 424, through which the output shaft of the first motor 422 and the lead screw 4231 are connected. Therefore, because the gear reduction module 424 and the lead screw module 423 are added to the transmission chain between the first motor 422 and the transmission shaft 31, the accuracy of the first motor 422 driving the transmission shaft 31 can be improved twice, thereby improving the adjustment accuracy of the transducer assembly 200.

[0321] As mentioned above, the skin care device also includes a second mounting bracket 41 located outside the media chamber 51. Therefore, the lead screw module 423 can be mounted and fixed to the second mounting bracket 41, the gear reduction module 424 can be mounted and fixed to the lead screw module 423, and the first motor 422 can be mounted and fixed to the gear reduction module 424. Thus, in the actual assembly process, the first motor 422, the lead screw module 423, and the gear detection module can be installed as a single unit on the second mounting bracket 41 to improve the assembly efficiency of the skin care device.

[0322] In some embodiments, the first drive assembly 42 further includes a first sensor 425, which is configured to detect the position information of the lead screw nut 4232. By using the position information of the lead screw nut 4232 detected by the first sensor 425 as feedback, the first motor 422 can drive the drive shaft 31 to move more accurately, thereby improving the adjustment accuracy of the transducer assembly 200.

[0323] For example, the first drive assembly 42 further includes a fourth circuit board 426, which is mounted on the lead screw module 423, and the first sensor 425 is mounted on the side of the fourth circuit board 426 facing the lead screw module 423.

[0324] In some embodiments, the lead screw module 423 further includes a lead screw seat 4233, on which the lead screw 4231 is rotatably mounted. A sliding portion 4234 is provided on the outer periphery of the lead screw nut 4232, and the sliding portion 4234 is slidably connected to the lead screw seat 4233. This makes the sliding trajectory of the pusher 421 more stable and reliable.

[0325] The first sensor 425 can be set in correspondence with the sliding part 4234 to be configured to detect the position information of the lead screw nut 4232.

[0326] For example, the first sensor 425 may include a Hall sensor, a photoelectric sensor, etc., and this application embodiment does not limit it.

[0327] In some implementations, the first motor 422 is a stepper motor, which can further improve the adjustment accuracy of the transducer assembly 200.

[0328] In some embodiments, the second drive assembly 43 includes a second motor 431, the output shaft of which is movably connected to the drive shaft 31 along a first axis L1. This allows the second motor 431 to be configured to drive the drive shaft 31 to rotate synchronously about the first axis L1 via its output shaft, and to be configured such that the drive shaft 31 is movable relative to the output shaft of the second motor 431 along the first axis L1. Therefore, when the first drive assembly 42 drives the drive shaft 31 to move along the first axis L1, the drive shaft 31 can move relative to the output shaft of the second motor 431 along the first axis L1.

[0329] In the first transmission connection method between the output shaft of the second motor 431 and the transmission shaft 31, the second drive assembly 43 includes a connector 432 fixedly connected to the output shaft of the second motor 431. The connector 432 has a transmission hole 4321, which extends along the first axis L1. The transmission hole 4321 is a non-circular hole. One end of the transmission shaft 31 away from the sound output area 111 is slidably disposed in the transmission hole 4321 along the first axis L1. Therefore, it can also be simply connected such that the connector 432 is sleeved on the transmission shaft 31, so that the transmission shaft 31 can be telescopically inserted through the connector 432 along the first axis L1.

[0330] It should be noted that the transmission hole 4321 can be an elliptical hole, a square hole, a triangular hole, or any other irregularly shaped hole, and this application embodiment does not limit this.

[0331] In some implementations, the second motor 431 is a stepper motor, which can further improve the adjustment accuracy of the transducer assembly 200.

[0332] It should be understood that the drive assembly 400 may also consist of only the first drive assembly 42 without the second drive assembly 43. That is, the first drive assembly 42 includes a first motor 422 and a pusher 421. The first motor 422 is driveably connected to the pusher 421, and the drive end of the pusher 421 is engaged in a transmission groove relative to the transmission shaft 31 to form a transmission connection. The first motor 422 is configured to drive the transmission shaft 31 to move along the axial direction via the pusher 421. In this case, the drive assembly 400 may include the second drive assembly 43, and the second drive assembly 43 may also be located on the side of the first drive assembly 42 opposite to the transducer assembly 200. Alternatively, the drive assembly 400 may not include the second drive assembly 43; this embodiment does not limit this.

[0333] Please continue to refer to Figure 16. In the second transmission connection method between the output shaft of the second motor 431 and the transmission shaft 31, the second drive assembly 43 includes a converter 432 fixedly connected to the output shaft of the second motor 431. The converter 432 is provided with a first transmission notch 4322, and the transmission shaft 31 is provided with a second transmission notch 316 that cooperates with the first transmission notch 4322.

[0334] For example, both the first transmission notch 4322 and the second transmission notch 316 extend along the first axis L1. The adapter 432 is embedded in the second transmission notch 316, and the transmission shaft 31 is embedded in the first transmission notch 4322. For instance, the adapter 432 can be semi-cylindrical, and one end of the transmission shaft 31 can be semi-cylindrical to mate with the adapter 432, so that they can abut against each other and form a cylindrical structure. That is to say, unlike the first transmission connection method between the output shaft of the second motor 431 and the transmission shaft 31, the adapter 432 may not be fitted onto the transmission shaft 31.

[0335] Of course, one of the sidewalls of the first transmission notch 4322 and the second transmission notch 316 may be provided with a groove extending along the first axis L1, and the other may be provided with a slider extending along the first axis L1, with the slider slidably installed in the groove.

[0336] In the third transmission connection method between the output shaft of the second motor 431 and the transmission shaft 31, the output shaft of the second motor 431 is provided with a first transmission notch 4322, and the transmission shaft 31 is provided with a second transmission notch 316 that engages with the first transmission notch 4322. That is to say, unlike the second transmission connection method between the output shaft of the second motor 431 and the transmission shaft 31, the output shaft of the second motor 431 can directly contact and engage with the transmission shaft 31, so there is no need to provide an additional adapter 432.

[0337] Please continue referring to Figure 17. Optionally, in the second positional relationship between the first drive assembly 42 and the second drive assembly 43, the second drive assembly 43 can also be located between the first drive assembly 42 and the transducer assembly 200. Therefore, compared to the first drive assembly 42 and the second drive assembly 43 being disposed in the same area along the first axis L1 of the drive shaft 31, this embodiment of the application disposes the first drive assembly 42 and the second drive assembly 43 at different positions along the first axis L1 of the drive shaft 31, allowing the skin care device to be made finer at various points along the first axis L1.

[0338] For example, as shown in 17a of FIG17, the second drive assembly 43 is mounted on one end of the drive shaft 31 away from the transducer assembly 200. The first drive assembly 42 includes a first motor 422, which is located on the side of the second drive assembly 43 away from the transducer assembly 200. The peripheral side of the drive shaft 31 is provided with a transmission groove, which is located between the medium housing 500 and the second drive assembly 43. The drive assembly 400 also includes a pusher 421, one end of which is rotatably engaged in the transmission groove relative to the drive shaft 31 to form a transmission connection. The other end of the pusher 421 is transmissionally connected to the first motor 422, and is configured such that the first motor 422 pushes the drive shaft 31 to move along the first axis L1 direction through the pusher 421.

[0339] It is also understood that the transmission connection method between the second drive component 43 and the transmission shaft 31 can be referred to the transmission connection method between the second drive component 43 and the transmission shaft 31 in the second positional relationship between the first drive component 42 and the second drive component 43 described above. This embodiment of the application will not be repeated here.

[0340] Optionally, as shown in 17b of Figure 17, a transmission groove is provided on the peripheral side of the end of the drive shaft 31 opposite to the transducer assembly 200. The first drive assembly 42 includes a first motor 422 and a pusher 421. One end of the pusher 421 is rotatably engaged in the transmission groove relative to the drive shaft 31 to form a transmission connection, and the other end of the pusher 421 is transmissionally connected to the first motor 422, configured such that the first motor 422 pushes the drive shaft 31 to move along the first axis L1 direction via the pusher 421. The second drive assembly 43 includes a first gear 433, a second gear 434, and a second motor 431. The first gear 433 is synchronously rotatable and relatively slidably sleeved on the drive shaft 31. The second gear 434 meshes with the first gear 433, and the output shaft of the second motor 431 is fixedly connected to the first gear 433. This allows the second drive assembly 43 to be located between the first drive assembly 42 and the transducer assembly 200; the first gear 433 can be slidably sleeved on the outside of the drive shaft 31 through a non-circular hole to drive and cooperate with the drive shaft 31, so that the first gear 433 can rotate synchronously and can be relatively slidably sleeved on the drive shaft 31.

[0341] Referring again to Figures 18, 19, and 37, in some embodiments, the skin care device further includes a second mounting bracket 41. The second mounting bracket 41 may include a first horizontal plate 413, a first surrounding plate 414, and a second surrounding plate 415. The first horizontal plate 413 is located on the side of the drive shaft 31 opposite to the transducer assembly 200, with one surface in the thickness direction facing the transducer assembly 200. The second drive assembly 43 is at least partially mounted on the side of the first horizontal plate 413 opposite to the transducer assembly 200. The first surrounding plate 414 is connected to the first horizontal plate 413 and is located on the outer periphery of the drive shaft 31, extending circumferentially along the drive shaft 31. The second surrounding plate 415 is connected to the first horizontal plate 413 and is located on the outer periphery of the second drive assembly 43 (e.g., the second motor 431 of the second drive assembly 43), extending circumferentially along the second drive assembly 43. The first enclosure 414 and the second enclosure 415 are both connected and fixed to the outer shell 100, and the first enclosure 414 and the second enclosure 415 are located on different sides of the first axis L1 in the circumferential direction.

[0342] Thus, the first enclosure 414 and the second enclosure 415 can respectively protect the drive shaft 31 and the second drive assembly 43, and the second mounting bracket 41 can be connected to the housing 100 from different sides of the first axis L1 in the circumferential direction, thereby improving the stability and reliability of the installation of the second mounting bracket 41.

[0343] In some embodiments, the second mounting bracket 41 further includes a third enclosure plate 416 connected to the first cross plate 413. The third enclosure plate 416 and the second enclosure plate 415 are arranged at circumferential intervals along the second drive assembly 43 (e.g., the second motor 431 of the second drive assembly 43). Therefore, the second mounting bracket 41 can be connected to the housing 100 from different sides of the first axis L1 in the circumferential direction, thereby improving the stability and reliability of the installation of the second mounting bracket 41.

[0344] In some embodiments, the third enclosure 416 and the first enclosure 414 are fixedly connected to the housing 100 on the same side of the first axis L1 in the circumferential direction, and the third enclosure 416 and the second enclosure 415 are fixedly connected to the housing 100 on opposite sides of the first axis L1 in the circumferential direction.

[0345] Referring to Figures 20 and 21 together, in some embodiments, the skin care device further includes a first circuit board assembly 71, which includes a first circuit board 711 and a button 712.

[0346] One surface of the first circuit board 711 in the thickness direction may face the outer peripheral surface of the first enclosure 414, and the button 712 is disposed on the side of the first circuit board 711 away from the first enclosure 414. That is, the first circuit board 711 may be located on the outer peripheral side of the first enclosure 414.

[0347] The outer surface of the first enclosure plate 414 facing the first circuit board 711 is a flat surface, which is different from the outer surface of the first enclosure plate 414 facing the first circuit board 711 being a curved surface that bulges towards the first circuit board 711. This allows for more space between the first enclosure plate 414 and the first circuit board 711 to accommodate some parts, thus facilitating the miniaturization design of the skin care device.

[0348] For example, the first circuit board assembly 71 further includes a first component 713 located on the side of the first circuit board 711 facing the first enclosure 414. The first enclosure 414 has a protruding first connecting portion 4141 on the side facing the first circuit board 711, and the inner wall of the housing 100 has a connected second connecting portion and a first reinforcing rib 1211. The second connecting portion is connected and fixed to the first connecting portion 4141. Along the first axis L1, the orthographic projection of at least one of the first connecting portion 4141, the second connecting portion, and the first reinforcing rib 1211 at least partially coincides with the orthographic projection of the first component 713. Therefore, the space between the first enclosure 414 and the first circuit board 711 can be fully utilized to facilitate the miniaturization design of the skin care device.

[0349] In some embodiments, the second mounting bracket 41 further includes at least one second horizontal plate 417 connected to the first enclosure plate 414, and all the second horizontal plates 417 and the first horizontal plates 413 are arranged along the first axis L1. Thus, the structural strength of the first enclosure plate 414 can be improved by the second horizontal plate 417.

[0350] In some embodiments, the second horizontal plate 417 may be provided with a third mounting hole 411. The drive shaft 31 passes through the third mounting hole 411 and is clearance-fitted with the third mounting hole 411. Thus, the second mounting bracket 41 can provide a certain limit on the drive shaft 31 through the second horizontal plate 417 to prevent violent radial runout during the rotation of the drive shaft 31.

[0351] In some embodiments, at least one second cross plate 417 is fixedly connected to the first drive assembly 42, which is located on opposite sides of the drive shaft 31 in the circumferential direction, thereby making the internal structure of the skin care device more compact.

[0352] In some embodiments, at least 80% of the orthographic projection of the first drive assembly 42 coincides with the orthographic projection of the medium housing 500 along the first axis L1, and at least 80% of the orthographic projection of the second drive assembly 43 coincides with the orthographic projection of the medium housing 500. This allows the medium housing 500, the first drive assembly 42, and the second drive assembly 43 to be substantially located within the same virtual cylinder, resulting in a more compact arrangement of components within the housing 100.

[0353] In some embodiments, the drive assembly 400 is disposed on the side of the transducer assembly 200 opposite to the sound output region 111, and the drive assembly 400 is drively connected to the drive shaft assembly 300 to be configured to drive the drive shaft assembly 300 to move, for example, drive the drive shaft assembly 300 to rotate about a first axis L1 and / or move along the first axis L1.

[0354] Referring to Figure 21, the skin care device may further include a second circuit board assembly 72, which includes a second circuit board 721 and a third circuit board 722. The second circuit board 721 and the third circuit board 722 are stacked on the side of the drive assembly 400 opposite to the transducer assembly 200.

[0355] Therefore, compared to using a single large board to replace the second circuit board 721 and the third circuit board 722, this embodiment of the application stacks the second circuit board 721 and the third circuit board 722 on the side of the drive assembly 400 away from the transducer assembly 200. This effectively reduces the length of the second circuit board assembly 72, thereby reducing the size of the skin care device in the length direction of the second circuit board assembly 72. Simultaneously, it reuses the space on the side of the drive assembly 400 away from the transducer assembly 200, thus facilitating the miniaturization design of the housing 100. Compared to placing the drive assembly 400 on one side of the drive second circuit board assembly 72 in the thickness direction, this application places the second circuit board assembly 72 on the side of the drive assembly 400 away from the transducer assembly 200. This helps reduce the circumferential size of the skin care device, allowing for a thinner design and avoiding a bulky device, thus facilitating miniaturization and easier handling.

[0356] For example, the outer casing 100 is elongated, with the sound-emitting area 111, transducer assembly 200, drive assembly 400, and second circuit board assembly 72 arranged sequentially along the length of the skin care device. The second circuit board 721 and the third circuit board 722 both extend along the length of the skin care device. This allows for efficient use of the internal space of the outer casing 100 along its length, preventing it from being too bulky for easy storage and handling. Furthermore, stacking the second circuit board 721 and the third circuit board 722 on the side of the drive assembly 400 away from the transducer assembly 200 increases the weight at the rear of the outer casing 100, bringing the center of gravity of the skin care device closer to the center of the outer casing 100, thus reducing user fatigue when holding it.

[0357] In some embodiments, the second circuit board assembly 72 further includes a power interface 7211 and a transformer 7212. Both the power interface 7211 and the transformer 7212 are mounted on the second circuit board 721. The power interface 7211 is configured to be electrically connected to an external power source, and the transformer 7212 is electrically connected to the transducer assembly 200 to drive the transducer assembly 200. It is understood that the transducer assembly 200 requires a relatively high operating voltage to drive it; therefore, by placing both the power interface 7211 and the transformer 7212 on the second circuit board 721, higher voltage electrical energy input from the outside can directly drive the transducer assembly 200.

[0358] In some embodiments, the third circuit board 722 is electrically connected to the second circuit board 721, enabling the second circuit board 721 to transfer a portion of the electrical energy input from the external power source to the third circuit board 722. The third circuit board 722 is electrically connected to the drive assembly 400 to drive the drive assembly 400. Therefore, in actual operation, the second circuit board 721 may divert a portion of the low-voltage electrical energy input from the power interface 7211 to the third circuit board 722 to drive the drive assembly 400, while the higher-voltage portion continues to drive the transducer assembly 200.

[0359] Understandably, since the second circuit board assembly 72 is electrically connected to the transducer assembly 200, it is prone to generating a lot of heat during operation, which may affect the normal use of the skin care device.

[0360] Therefore, in some embodiments, the skin care device may further include a fan 73 disposed within the housing 100. The fan 73 is configured to drive air convection between the inside and outside of the housing 100 to dissipate heat from the interior of the housing 100, thereby improving the heat dissipation effect of the skin care device.

[0361] For example, referring to Figures 21 and 22, the housing 100 has a first air vent 16 and a second air vent 17, and the second circuit board assembly 72 is located between the first air vent 16 and the second air vent 17. Thus, the fan 73 can drive air from inside and outside the housing to form convection through the first air vent 16 and the second air vent 17. Furthermore, because the second circuit board assembly 72 is positioned between the first air vent 16 and the second air vent 17, the flowing air can pass more extensively over the heat-generating area on the second circuit board assembly 72, thereby improving the heat dissipation effect on the second circuit board assembly 72.

[0362] The fan 73 can be disposed on the second circuit board 721 such that the fan 73 is located between the first air outlet 16 and the second air outlet 17, so as to at least dissipate heat from the second circuit board assembly 72.

[0363] In some embodiments, the second air vent 17 may be located on the side end face of the housing 100 away from the sound output area 111.

[0364] In some embodiments, a gripping area is formed outside the housing 100, and a first air vent 16 and a second air vent 17 are located at both ends of the gripping area.

[0365] The fan 73 can be arranged side-by-side with the transformer 7212 on the same side of the second circuit board 721; and / or, the fan 73 is located on the side of the transformer 7212 away from the drive assembly 400. Since both the fan 73 and the transformer 7212 are relatively thick components, arranging them side-by-side on the same side of the second circuit board 721, rather than separately on different sides, reduces the overall thickness of the fan 73, transformer 7212, and second circuit board 721, thus facilitating a thinner and lighter design for skin care devices.

[0366] In some embodiments, the transformer 7212 is disposed at one end of the second circuit board 721 near the transducer assembly 200, and the fan 73 is at least partially located on the side of the transformer 7212 away from the transducer assembly 200. Therefore, compared to the fan 73 being located on the side away from the transducer assembly 200, the transformer 7212 can be closer to the transducer assembly 200, thereby allowing for a shorter electrical connection between the transformer 7212 and the transducer assembly 200.

[0367] The fan 73 can be a centrifugal fan or any other type of fan; this application does not limit this.

[0368] In some embodiments, the fan 73 is mounted on the second circuit board 721 so that a space for airflow is formed between the fan 73 and the second circuit board 721, thereby improving the heat dissipation effect at the second circuit board assembly 72.

[0369] In some embodiments, the fan 73 has two air inlets, one of which faces the second circuit board 721, and the other air inlet faces away from the second circuit board 721. Thus, the fan 73 can drive airflow between the fan 73 and the second circuit board 721 to improve heat dissipation at the second circuit board assembly 72.

[0370] In some embodiments, the air outlet of the fan 73 is located on the side of the fan 73 away from the transducer assembly 200 and facing the second air outlet 17. Therefore, the first air outlet 16 can be the air inlet of the housing 100, and the second air outlet 17 can be the air outlet of the housing 100.

[0371] In some embodiments, the housing 100 is elongated, with the sound-emitting region 111 located at one end along the length of the housing 100, and the second air vent 17 located at the other end along the length of the housing 100. Along the length of the housing 100, the first air vent 16 is located between the sound-emitting region 111 and the second air vent 17, and the transducer assembly 200 is located between the sound-emitting region 111 and the first air vent 16. Thus, the fan 73 can drive airflow through the second circuit board assembly 72 to dissipate heat from the second circuit board assembly 72.

[0372] In some embodiments, at least a portion of the first vent 16 faces the drive assembly 400, thereby allowing the fan 73 to also be used for cooling the drive assembly 400.

[0373] In some embodiments, the second circuit board assembly 72 further includes a conversion module 7213 disposed on the second circuit board 721. The input terminal of the conversion module 7213 is electrically connected to the power interface 7211, and the output terminal of the conversion module 7213 is electrically connected to the transformer 7212, so that the conversion module 7213 is configured to convert the DC power input to the power interface 7211 into AC power output to the transformer 7212.

[0374] The conversion module 7213 may be at least partially located on the side of the fan 73 near the second circuit board 721, or the conversion module 7213 may be at least partially located between the fan 73 and the transformer 7212. That is, the fan 73 may be mounted on the conversion module 7213, or the fan 73 and the transformer 7212 may be arranged side by side on the same side of the second circuit board 721, so that the fan 73 drives air to flow through the conversion module 7213 to dissipate heat from the conversion module 7213. This application embodiment does not limit this.

[0375] In some implementations, the conversion module 7213 may include a push-pull circuit, a full-bridge circuit, or a half-bridge circuit, and this application embodiment does not limit this.

[0376] In some embodiments, the conversion module 7213 includes a switching transistor. The switching transistor may be located between the fan 73 and the transformer 7212. For example, the switching transistor may be a MOSFET, a silicon transistor, etc., and this application embodiment does not limit this.

[0377] In some embodiments, the first air vent 16 is located on the side of the second circuit board 721 closer to the transducer assembly 200, and the second air vent 17 is located on the side of the second circuit board 721 away from the transducer assembly 200. Thus, the fan 73 can drive airflow through the transformer 7212 and the conversion module 7213 to dissipate heat from them.

[0378] In some embodiments, the second circuit board assembly 72 may not include a transformer 7212. That is, the second circuit board assembly 72 further includes a conversion module 7213, which is disposed on the second circuit board 721 and configured to convert the input DC power into AC power and output it. In this case, the second circuit board 721 may include a transformer 7212, so that the transformer 7212 boosts the voltage output by the conversion module 7213 and outputs it to the transducer assembly 200. Alternatively, the second circuit board 721 may not include a transformer 7212, so that the AC power output by the conversion module 7213 directly drives the transducer assembly 200. This application embodiment does not limit this.

[0379] In some embodiments, the drive assembly 400 includes a first drive assembly 42, a second drive assembly 43, and a sensor assembly. Both the first drive assembly 42 and the second drive assembly 43 are driveably connected to the transducer assembly 200 to drive the transducer assembly 200 to move along different paths. The sensor assembly is configured to detect information about the movement of the transducer assembly 200 driven by the first drive assembly 42 and / or the second drive assembly 43. The second circuit board assembly 72 also includes a first control interface mounted on a third circuit board 722. The number of first control interfaces is less than or equal to two. The first drive assembly 42, the second drive assembly 43, and the sensor assembly are all connected to the first control interface for electrical connection to the third circuit board 722.

[0380] Therefore, compared to the first drive component 42, the second drive component 43 and the sensor component being connected to different first control interfaces, the embodiments of this application can be understood as merging the corresponding interfaces of at least two of the first drive component 42, the second drive component 43 and the sensor component, in order to reduce the number of first control interfaces on the third circuit board 722, thereby facilitating the miniaturization design of the skin care device.

[0381] In some embodiments, along the direction of the transducer assembly 200 toward the drive assembly 400, at least one side of the orthographic projection of the drive assembly 400 protrudes outside the orthographic projection of the second circuit board assembly 72 along the thickness direction of the second circuit board assembly 72.

[0382] For example, when the orthographic projection of the drive assembly 400 protrudes from the outside of the orthographic projection of the second circuit board assembly 72 on each side along the thickness direction of the second circuit board assembly 72 in the direction of the transducer assembly 200 toward the drive assembly 400, the housing 100 can be made thinner at the second circuit board assembly 72 to facilitate gripping.

[0383] For example, the second circuit board assembly 72 further includes a second component 7221. The second component 7221 is disposed on the side of the third circuit board 722 opposite to the second circuit board 721. The maximum thickness of the second circuit board assembly 72 is the distance from the surface of the transformer 7212 opposite to the second circuit board 721 to the surface of the second component 7221 opposite to the second circuit board 721. Along the thickness direction of the second circuit board assembly 72, the maximum thickness of the drive assembly 400 is less than the maximum thickness of the second circuit board assembly 72.

[0384] For example, the second circuit board assembly 72 further includes a second component 7221, which is disposed on the side of the third circuit board 722 opposite to the second circuit board 721. The height of the second component 7221 protruding from the side of the third circuit board 722 opposite to the second circuit board 721 is less than the height of the drive assembly 400 protruding from the side of the third circuit board 722 opposite to the second circuit board 721.

[0385] For example, the height of the transformer 7212 protruding from the side of the second circuit board 721 away from the third circuit board 722 is less than the height of the drive assembly 400 protruding from the side of the second circuit board 721 away from the third circuit board 722.

[0386] In some implementations, the transformer 7212 is a planar transformer. This allows for the utilization of the inherent thinness and lightness of the planar transformer, resulting in a thinner and lighter skin care device.

[0387] In some embodiments, one surface of the transformer 7212 in the thickness direction faces the second circuit board 721 and faces away from the third circuit board 722. Therefore, it can be understood that the planar transformer is horizontally mounted on the second circuit board 721, so that the second circuit board assembly 72 is thinner overall.

[0388] In some embodiments, one surface of the fan 73 in the thickness direction is disposed facing one surface of the second circuit board 721 in the thickness direction. Therefore, it can also be understood that the fan 73 is also horizontally mounted, so that the second circuit board assembly 72 is thinner overall.

[0389] In some embodiments, the skin care device further includes a first circuit board assembly 71, which includes a first circuit board 711 and a human-machine interface component. The first circuit board 711 is disposed within the housing 100 and electrically connected to the second circuit board assembly 72. The first circuit board 711 extends along the drive assembly 400 toward the transducer assembly 200, with one surface of the first circuit board 711 in the thickness direction facing the drive assembly 400. The human-machine interface component is disposed on the side of the first circuit board 711 opposite to the drive assembly 400.

[0390] For example, as mentioned above, the human-computer interaction component can be a button 712.

[0391] In some embodiments, the first circuit board assembly 71 further includes a display component 714, which is disposed on the side of the first circuit board 711 away from the driving assembly 400 and is located on the side of the human-machine interaction component near the sound output area 111.

[0392] In some embodiments, the skin care device further includes an electrical stimulation component 800, which includes electrode pads 81 at least partially located on the outer periphery of the sound output region 111, configured to output current to the skin to be treated. Thus, the skin care device possesses at least two functions: focused ultrasound skin care and electrical stimulation, thereby enriching the functionality of the skin care device.

[0393] In some embodiments, the housing 100 includes a first end face 1121 on which a sound-emitting region 111 is formed, and the electrode sheet 81 is located only on the first end face 1121, resulting in poor adhesion between the electrode sheet 81 and the skin.

[0394] Referring to Figures 23 and 24, in some embodiments, the outer casing 100 further includes a third side surface 1122 that is bent and connected to the first end face 1121. The electrode sheet 81 is at least partially located on the first end face 1121 and at least partially located on the third side surface 1122. Therefore, since skin has a certain elasticity, when the first end face 1121 is attached to the skin to be treated, the skin to be treated will form a depression. At this time, the portions of the electrode sheet 81 located on the first end face 1121 and the portion located on the third side surface 1122 can both fit well into the inner side of the depression, thereby increasing the contact area between the electrode sheet 81 and the skin to be treated, and thus improving the adhesion effect between the electrode sheet 81 and the skin.

[0395] For example, electrode sheet 81 may include a first electrode sheet, the outer surface of which extends from a first end face 1121 to a third side face 1122; and / or, electrode sheet 81 may include a second electrode sheet and a third electrode sheet, the outer surface of which is located at the first end face 1121 and the outer surface of which is located at the third side face 1122. This results in electrode sheets 81 being provided at both the third side face 1122 and the first end face 1121.

[0396] In some embodiments, the first electrode sheet includes a bonding portion 811 and a through portion 812. The bonding portion 811 includes a front portion 8111 and a side portion 8112 that are bent and connected together. The front portion 8111 protrudes from the first end face 1121, and the side portion 8112 protrudes from the third side surface 1122, so that the outer surface of the first electrode sheet extends from the first end face 1121 to the third side surface 1122. The through portion 812 protrudes from the inner surface of the front portion 8111 and passes through the housing 100, thereby enabling the installation and fixation of the first electrode sheet and facilitating the extension of the first electrode sheet into the housing 100 for electrical connection.

[0397] In some embodiments, the first electrode sheet further includes a connecting rib 813, which connects the side portion 8112 and the through portion 812. The connecting rib 813 can improve the structural strength of the side portion 8112 to prevent warping and damage to the side portion 8112.

[0398] In some embodiments, the edges of the outer surface of the electrode sheet 81 are provided with rounded chamfers to avoid the electrode sheet 81 having straight edges that could scratch the skin or cause discomfort to the skin.

[0399] For example, the outer surface of the front portion 8111 and the outer surface of the side portion 8112 are rounded to avoid the electrode sheet 81 having a straight edge that could scratch the skin or cause discomfort to the skin.

[0400] In some embodiments, the outer casing 100 is provided with a receiving groove 115 and a second through hole 116. The opening of the receiving groove 115 extends from the first end face 1121 to the third side face 1122. The front portion 8111 and the side portion 8112 are both embedded in the receiving groove 115, thereby providing a certain positioning and fixing effect for the front portion 8111 and the side portion 8112. One end of the second through hole 116 faces the first end face 1121 and communicates with the bottom wall of the receiving groove 115. The through portion 812 passes through the second through hole 116 to realize the installation and fixing of the through portion 812.

[0401] In some embodiments, the sound-emitting area 111 includes a first sound-emitting hole 1111 disposed on the housing 100. A first annular protrusion 117 surrounding the first sound-emitting hole 1111 is provided on the inner wall of the housing 100, and a dispensing annular groove 1171 communicating with the second through hole 116 is formed on the outer periphery of the first annular protrusion 117. A through portion 812 is disposed within the dispensing annular groove 1171, and sealant is disposed within the dispensing annular groove 1171. Therefore, the sealant within the dispensing annular groove 1171 can achieve a good sealing effect at the second through hole 116.

[0402] In some embodiments, the electrical stimulation assembly 800 may further include a fifth circuit board 82 surrounding the outer periphery of the dielectric chamber 51. All electrode pads 81 are connected to the fifth circuit board 82.

[0403] The fifth circuit board 82 can be electrically connected to the second circuit board assembly 72. Thus, the second circuit board assembly 72 controls the electrical stimulation assembly 800 through the fifth circuit board 82.

[0404] The fifth circuit board 82 can abut against the first annular protrusion 117 to provide certain support and limit the fifth circuit board 82.

[0405] In some embodiments, the electrical stimulation assembly 800 further includes a third fastener (not shown in the figure), which passes through the fifth circuit board 82 and is connected and fixed to the through portion 812, thereby achieving the connection and fixation of the fifth circuit board 82 and the electrode sheet 81.

[0406] For example, the through portion 812 is provided with a threaded hole 8121. Correspondingly, the third fastener may include a fastening screw to screw the through portion 812 to the third fastener.

[0407] In some embodiments, the skin care device further includes a temperature sensor (not shown) located within the housing 100 and mounted on the electrode pad 81. Thus, the temperature of the electrode pad 81 can be detected by the temperature sensor, and the temperature change of the electrode pad 81 can be used to determine whether the electrode pad 81, or the first end face 1121, is in contact with the skin to be treated.

[0408] Accordingly, the skin care device also includes a skin contact detection module, which is connected to a temperature sensor and configured to detect the adhesion state between the first end face 1121 and the skin to be treated. The skin contact detection module can be located on the fifth circuit board 82, and can employ any skin contact detection circuit in the prior art; this application embodiment does not limit this.

[0409] For example, the penetration part 812 is provided with a detection hole 8122, and a temperature sensor is installed in the detection hole 8122.

[0410] As shown in Figure 21, in some embodiments, the fifth circuit board 82 is further provided with a bonding detection component 83, which is at least partially disposed in the dispensing ring groove 1171. The bonding detection component 83 is configured to detect the bonding state between the first end face 1121 and the skin to be treated.

[0411] For example, the bonding detection component 83 may include a detection capacitor. Correspondingly, the fifth circuit board 82 may also be provided with a skin-fitting detection circuit, which is electrically connected to the bonding detection component 83 or the detection capacitor.

[0412] In some embodiments, there are multiple electrode pads 81, thereby electrically stimulating a larger area of ​​the skin to be treated through multiple electrode pads 81.

[0413] For example, multiple electrode pads 81 are arranged circumferentially around the sound-emitting area 111, thereby making the electrode pads 81 distributed over a larger area to provide electrical stimulation to a larger area of ​​the skin to be treated.

[0414] In some embodiments, the electrode sheet 81 protrudes from the outer surface of the housing 100 by 0.05 to 0.25 mm. This avoids the electrode sheet 81 protruding too much from the outer surface of the housing 100, which would affect the adhesion between the first end face 1121 and the skin to be treated. It also avoids the electrode sheet 81 protruding too little from the outer surface of the housing 100 or even sinking into the housing 100, which would prevent the electrode sheet 81 from adhering to the skin to be treated.

[0415] In some embodiments, the electrical stimulation component 800 may include at least one of an EMS electrical stimulation component and an RF electrical stimulation component, such that the electrode pad 81 is configured to output at least one of an EMS current and a radio frequency current.

[0416] Through creative work, the inventor discovered that in related technologies, the outer shell 100 is cylindrical, which is inconvenient for users to hold.

[0417] Based on this, please continue to refer to Figures 25 and 28. In some embodiments, the housing 100 is elongated and includes a first end 118 located in the length direction. A working area 111a is provided on the end face or peripheral surface of the first end 118. A recess 18 configured for gripping is provided on the peripheral surface of the housing 100. The recess 18 extends along the length direction of the housing 100, and the length of the recess 18 in the extending direction is greater than or equal to 3 cm. The extending direction of the recess 18 is inclined relative to the length direction of the housing 100.

[0418] Therefore, because the recess 18 has sufficient length and because its extension direction is inclined relative to the length direction of the outer casing 100, during the user's grip, the user's fingers can sink into the recess in most gripping positions, thus forming a point of force for a more convenient and stable grip. Of course, when gripping, the connection between the fingers and palm can be sunk into the recess 18 to form a weaker point of force, improving the user's grip experience.

[0419] For example, the length of the recess 18 in the extending direction can be 3 cm, 4 cm, 4.2 cm, 5 cm, 5.6 cm, 6.7 cm, 7 cm, 7.5 cm, 8 cm, 8.6 cm, 9.41 cm, 10 cm, 12 cm, 12.6 cm, 13.7 cm, 14 cm, 15 cm, 16 cm or 19 cm, and the embodiments of this application do not limit this.

[0420] Optionally, the length of the recess 18 in the extending direction is 5.6-13.7 cm, which allows the user to easily insert multiple fingers into the recess while avoiding the recess being too long.

[0421] In some embodiments, the housing 100 further includes a first end 118 and a second end 151 that are opposed to each other along the length direction. The recess 18 includes a proximal end 181 near the first end 118 and a distal end 182 near the second end 151, and the recess 18 extends obliquely from the proximal end 181 toward the distal end 182 in a direction away from the working area 111a.

[0422] For example, the length direction of the outer casing 100 is left-right, such that the left end of the outer casing 100 forms a first end 118 and the right end forms a second end 151. In this case, the recess 18 can be provided extending from the lower left to the upper right, so the left end of the recess 18 forms a proximal end 181 and the right end forms a distal end 182. Of course, the recess 18 can also be provided extending from the upper left to the lower right, and this embodiment of the application does not limit this.

[0423] In some embodiments, the recess 18 may be strip-shaped. For example, the recess 18 may be a straight strip-shaped recess 18, or it may be a curved strip-shaped recess 18. Depending on the shape of the housing 100, the shape of the recess 18 may also be varied.

[0424] In some embodiments, the recess 18 is located in the middle of the length direction of the housing 100, so that the user's fingers can fall into the recess 18 better during the grip, making it easier to hold.

[0425] For example, the distance between the proximal end 181 and the first end 118 in the length direction of the housing 100 is D5, where D5 is 4.5 cm to 8 cm. For example, D5 can be 4.5 cm, 4.9 cm, 5 cm, 5.7 cm, 6 cm, 6.4 cm, 6.9 cm, 7 cm, 7.5 cm or 8 cm, and this embodiment of the application does not limit this.

[0426] Furthermore, the recess 18 can also guide the user to hold the outer shell 100 in the middle of its length direction, so as to avoid the user's holding area being too close to the first end 118, thereby preventing the user's hand from coming into contact with the skin to be treated during use.

[0427] In some embodiments, the distance between the distal end 182 and the second end 151 along the length of the housing 100 is D6, where D6 is 0.5 cm to 6 cm. For example, D6 can be 0.5 cm, 1 cm, 1.5 cm, 1.7 cm, 2.5 cm, 3.5 cm, 4.5 cm, 4.9 cm, 5 cm, 5.7 cm, or 6 cm, and this application embodiment does not limit this.

[0428] Furthermore, the recess 18 can also guide the user to hold the device in the middle of the length direction of the housing 100, avoiding the user's holding area being too close to the second end 151, thereby preventing the user's hand from contacting some power interfaces 7211, etc., of the second end 151 during use.

[0429] In some embodiments, the length of the recess 18 in the extending direction is 7 cm to 16 cm. That is, if the recess 18 is arc-shaped, it can be understood that the arc length of the recess 18 is 7 cm to 16 cm, thereby ensuring that the recess 18 has sufficient length to accommodate multiple fingers of the user, or to allow the user's thumb to be inserted into the recess 18 so that the length direction of the user's thumb is the same as the extending direction of the recess 18. For example, the length of the recess 18 in the extending direction is 7 cm, 7.5 cm, 8 cm, 9.41 cm, 10 cm, 12 cm, 13.7 cm, 14 cm, 15 cm, or 16 cm, and this application embodiment does not limit this.

[0430] In some embodiments, the angle between the extending direction of the recess 18 and the length direction of the outer casing 100 is 25 degrees to 75 degrees. For example, the angle between the extending direction of the recess 18 and the length direction of the outer casing 100 is 25 degrees, 35 degrees, 40 degrees, 50 degrees, 67 degrees, 70 degrees or 75 degrees, and this application embodiment does not limit this.

[0431] Thus, the user's fingers can precisely sink into the recess 18 for easy grip. For example, when the user grips the peripheral surface of the casing 100, the tips of the index, middle, ring, and little fingers may lie on an inclined line, and the inclination angle of the recess 18 may be approximately the same as that inclined line, allowing the user's index, middle, ring, and little fingers to precisely sink into the recess 18. Alternatively, when the user grips the peripheral surface of the casing 100, the inclination angle of the thumb may be exactly the same as the inclination angle of the recess 18, allowing the thumb to sink into the recess 18.

[0432] In some embodiments, the length of the recess 18 in the extending direction is D1 (i.e., if the recess 18 is arc-shaped, it can be understood that the arc length of the recess 18 is D1). The proximal end 181 and the distal end 182 are located on opposite sides of the housing 100 along the first direction H1. The first direction H1 is perpendicular to the length direction of the housing 100. The distance between the proximal end 181 and the distal end 182 in the first direction H1 is D2. The ratio of D1 to D2 is 2-4; and / or, D1 is 7 cm-16 cm and D2 is 3.5 cm-5.5 cm. Thus, during user gripping, the user's fingers can precisely sink into the recess 18 for easy gripping.

[0433] For example, the ratio of D1 to D2 can be 2, 2.4, 2.5, 2.79, 2.9, 3, 3.4, 3.5, 3.82, or 4, and this embodiment does not limit this value. D2 can be 3.5 cm, 3.7 cm, 3.9 cm, 4 cm, 4.1 cm, 4.5 cm, 4.89 cm, 5 cm, or 5.5 cm, and this embodiment does not limit this value either.

[0434] Therefore, during the user's grip, the user's fingers can precisely sink into the recess 18 for a comfortable hold. For example, when the user grips the peripheral surface of the casing 100, the tips of the index, middle, ring, and little fingers may be positioned on an inclined line, and the inclination angle of the recess 18 may be approximately the same as that inclined line, allowing the user's index, middle, ring, and little fingers to precisely sink into the recess 18. Alternatively, when the user grips the peripheral surface of the casing 100, the inclination angle of the thumb may be exactly the same as the inclination angle of the recess 18, allowing the thumb to sink into the recess 18.

[0435] In some embodiments, the end face of the second end 151 includes a bottom 152. The bottom 152 and the proximal end 181 are disposed correspondingly along the length direction of the housing 100, and the distance between the bottom 152 and the proximal end 181 in the length direction of the housing 100 is D3.

[0436] D3 is between 7 cm and 16 cm. For example, D3 can be 7 cm, 7.5 cm, 8 cm, 9.41 cm, 10 cm, 12 cm, 13.7 cm, 14 cm, 15 cm or 16 cm, and the embodiments of this application do not limit this.

[0437] This allows for sufficient length to be reserved between the bottom 152 and the proximal end 181 for the user to hold. For example, the user's palm can support the part of the outer shell 100 between the bottom 152 and the proximal end 181, at which point the tips of the user's index, middle, ring, and little fingers can be inserted into the inclined recess 18.

[0438] It is also understandable that the difference between D3 and D1 is less than or equal to 2 cm, that is, D3 and D1, so that not only is there enough length between the bottom 152 and the proximal end 181 for the user to hold, but also that the recess 18 has enough length to accommodate the ends of the user's index finger, middle finger, ring finger and little finger.

[0439] Please continue to refer to Figure 29. In some embodiments, the housing 100 includes a panel 14, which is provided with at least one of a display component 714 and a human-computer interaction component.

[0440] Panel 14 and distal end 182 are located on the same side of the circumferential direction of housing 100; and / or, panel 14 and proximal end 181 are located on opposite sides of the circumferential direction of housing 100. Therefore, with sufficient length reserved between bottom 152 and proximal end 181 for user grip, the user's hand is unlikely to obstruct panel 14 when gripping.

[0441] In some embodiments, the human-computer interaction component includes a button 712, and a display component 714 is located between the human-computer interaction component and the first end 118.

[0442] It is also understood that, as mentioned above, the skin care device may include a first circuit board assembly 71. The first circuit board assembly 71 may be mounted on the panel 14 and configured for integrated installation and removal via the panel 14.

[0443] In some embodiments, the width of at least a portion of the panel 14 gradually increases along the direction from the second end 151 toward the first end 118. Therefore, since the portion of the panel 14 closer to the first end 118 is wider and less convenient for the user to hold, the user can be guided to hold it in other areas to avoid the user obstructing the panel 14.

[0444] In some embodiments, the peripheral surface of the housing 100 includes a fourth side surface 123 and a fifth side surface 133 located on opposite sides in a second direction H2, the second direction H2 being perpendicular to the length direction of the housing 100. The recess 18 includes a first recess 18a located on the fourth side surface 123, and / or, the recess 18 includes a second recess 18b located on the fifth side surface 133.

[0445] So, taking the recess 18 as an example, which includes both the first recess 18a and the second recess 18b, during the user's grip, the user's fingers can sink into the recess 18 when the user grips it in most ways, so as to further facilitate the user to form a point of force; for example, during the user's grip, the tips of the index finger, middle finger, ring finger and little finger can sink into the first recess 18a, and the thumb can sink into the second recess 18b.

[0446] In some embodiments, the proximal end 181 of the first recess 18a is disposed adjacent to the proximal end 181 of the second recess 18b, and / or, the distal end 182 of the first recess 18a is disposed adjacent to the distal end 182 of the second recess 18b. This ensures that both the first recess 18a and the second recess 18b are sufficiently long to accommodate different gripping postures of the user.

[0447] It is understandable that the proximal end 181 of the first recess 18a is positioned adjacent to the proximal end 181 of the second recess 18b. This can be either a connection between the proximal ends 181 of the first recess 18a and the second recess 18b, or a separation between them. Similarly, the distal end 182 of the first recess 18a is positioned adjacent to the distal end 182 of the second recess 18b. This can be either a connection between the distal ends 182 of the first recess 18a and the second recess 18b, or a separation between them.

[0448] That is, the proximal end 181 of the first recess 18a can be connected to the proximal end 181 of the second recess 18b, and / or the distal end 182 of the first recess 18a can be connected to the distal end 182 of the second recess 18b.

[0449] In some embodiments, the housing 100 includes a first housing assembly 12 having a fourth side 123 and a second housing assembly 13 having a fifth side 133. Thus, the manufacturing difficulty of the housing 100 and the recess 18 can be reduced by manufacturing the first housing assembly 12 and the second housing assembly 13 separately.

[0450] In some embodiments, the peripheral surface of the housing 100 further includes a sixth side surface 141. The sixth side surface 141 has a proximal end 1411 near the working area 111a and a distal end 1412 away from the working area 111a. The distal end 1412 is disposed adjacent to the distal end 182 of the first recess 18a and / or the second recess 18b in the longitudinal direction of the housing 100. The width of the sixth side surface 141 gradually increases at least partially from the distal end 1412 to the proximal end 1411.

[0451] Therefore, since the proximal end 1411 is wider, it can prevent the user from holding the hand at the proximal end 1411, thereby preventing the user's holding area from getting too close to the first end 118, and thus preventing the user's hand from coming into contact with the skin to be treated during use.

[0452] Please continue referring to Figure 30. In some embodiments, the housing 100 is provided with a first air vent 16, which is located near the proximal end 181 of the first recess 18a and the proximal end 181 of the second recess 18b; and / or, the housing 100 is provided with a second air vent 17, which is located at one end of the housing 100 away from the working area 111a in the length direction. This prevents the user from blocking the air vents of the housing 100 when holding it.

[0453] In some embodiments, the housing 100 includes a proximal portion 100a and a distal portion 100b. The proximal portion 100a is located on one side of the first recess 18a and the second recess 18b, and has a working area 111a. The distal portion 100b is located on the other side of the first recess 18a and the second recess 18b. That is, the first recess 18a and the second recess 18b can be used as a dividing line to define a portion of the housing 100 along its length as the proximal portion 100a and another portion as the distal portion 100b.

[0454] The dimension of the distal portion 100b in the second direction H2 is smaller than the dimension of the distal portion 100b in the first direction H1, and the first direction H1, the second direction H2, and the length direction of the outer casing 100 are perpendicular to each other. This results in a flattened structure for easy gripping by the user.

[0455] The dimension of the distal portion 100b in the second direction H2 first increases and then decreases in the direction away from the first recess 18a and the second recess 18b. As a result, the distal portion 100b has a convex arcuate structure, which can fit the user's palm and thus improve the user's grip comfort.

[0456] The distal portion 100b has a tail end face 153, which is inclined relative to the length direction of the outer casing 100, and the inclination direction of the tail end face 153 is consistent with the inclination direction of the first recess 18a and the second recess 18b. Therefore, when the second air vent 17 is located on the tail end face 153, it can prevent the second air vent 17 from facing the user's wrist or forearm, thereby preventing hot air exhausted from the outer casing 100 from blowing onto the user's arm, or preventing the user's arm from blocking the air intake of the second air vent 17.

[0457] A first air vent 16 is provided on the distal part 100b near the proximal end 181 of the first recess 18a and the second recess 18b.

[0458] The distal portion 100b includes a distal side 100c extending along the length direction of the housing 100, and the proximal portion 100a includes a proximal side 100d extending along the length direction of the housing 100. The intersection of the proximal side 100d and the distal side 100c is located near the proximal end 181 of the first recess 18a and the second recess 18b. The distal side 100c protrudes beyond the proximal side 100d in a first direction H1, and the first direction H1, the second direction H2, and the length direction of the housing 100 are all perpendicular to each other. When the user holds the outer shell 100 with the palm supporting the far side 100c, the outer shell 100 can be positioned with its length direction and horizontal direction roughly the same. In this case, it can be understood that the near side 100d is higher than the far side 100c, so the near end 1411 with the working area 111a can also be located at a higher position. Therefore, when the user lifts the skin care device lower with less effort, the working area 111a can also fit against the higher facial area.

[0459] Referring again to FIG31, in some embodiments, the proximal portion 100a includes a fourth sub-side surface 1231 configured to form a portion of the fourth side surface 123, a fifth sub-side surface 1331 configured to form a portion of the fifth side surface 133, and a sixth side surface 141 connecting the fourth sub-side surface 1231 and the fifth sub-side surface 1331. The sixth side surface 141 and the distal end 182 are located on the same side of the housing 100 in the circumferential direction. For example, the portion of the fourth side surface 123 located at the proximal end 1411 forms the fourth sub-side surface 1231, and the portion of the fifth side surface 133 located at the proximal end 1411 forms the fifth sub-side surface 1331.

[0460] The sixth side 141 has a proximal end 1411 near the working area 111a and a distal end 1412 away from the working area 111a. The distal end 1412 is disposed near the distal end 182 of the first recess 18a and / or the second recess 18b in the longitudinal direction of the housing 100. The width of the sixth side 141 gradually increases at least partially from the distal end 1412 to the proximal end 1411.

[0461] Therefore, since the proximal end 1411 is wider, it can prevent the user from holding the hand at the proximal end 1411, thereby preventing the user's holding area from getting too close to the first end 118, and thus preventing the user's hand from coming into contact with the skin to be treated during use.

[0462] For example, the sixth side 141 is a triangular face or a triangular-like face.

[0463] The sixth side 141 is a display surface and / or an operation surface. For example, the sixth side 141 is formed by the panel 14. Since the portion of the panel 14 near the first end 118 is wider and not convenient for the user to hold, the user can be guided to hold it in other areas to avoid the user obstructing the panel 14.

[0464] The distance between the fourth sub-side surface 1231 and the fifth sub-side surface 1331 in the second direction H2 is D4. In the length direction of the outer shell 100, D4 gradually increases at least partially from the far end 182 of the recess 18 towards the near end 181 of the recess 18.

[0465] The distance between the fourth sub-side 1231 and the fifth sub-side 1331 in the second direction H2 is D4. In the first direction H1, D4 gradually increases at least partially from the proximal end 181 of the recess 18 to the distal end 182 of the recess 18. The first direction H1, the second direction H2 and the length direction of the outer shell 100 are perpendicular to each other.

[0466] Please continue referring to Figure 32. As mentioned above, in some embodiments, the housing 100 includes a first housing assembly 12 and a second housing assembly 13 disposed opposite to each other. The first housing assembly 12 and the second housing assembly 13 may be disposed opposite to each other along a second direction H2, which is perpendicular to the length direction of the housing 100. The recess 18 includes a first recess 18a and a second recess 18b. The first recess 18a is disposed on the first housing assembly 12, and the extending direction of the first recess 18a is inclined relative to the length direction of the housing 100. The second recess 18b is disposed on the second housing assembly 13, and the extending direction of the second recess 18b is inclined relative to the length direction of the housing 100.

[0467] The outer casing 100 may further include at least one of a tail plate 15 and a head shell 11. The tail plate 15 is connected to the first casing assembly 12 and the second casing assembly 13, respectively, and the tail plate 15 forms an end face (i.e., tail end face 153) of the outer casing 100 opposite to the first end 118. The head shell 11 is connected to the first casing assembly 12 and the second casing assembly 13, respectively, and the head shell 11 forms an end face of the first end 118. Thus, by splicing multiple casings to form the outer casing 100, the outer casing 100 has the advantage of being easy to manufacture.

[0468] In some embodiments, the first housing assembly 12 includes a first main housing 121 and a first decorative housing 122. The first main housing 121 is connected to the second housing assembly 13. The first decorative housing 122 is mounted on the side surface of the first main housing 121 opposite to the second housing assembly 13.

[0469] Therefore, the aesthetics of the first housing assembly 12 can be enhanced by the first decorative shell 122. For example, the first device shell can cover the connection holes of the first main housing 121.

[0470] In some embodiments, a first recess 18a is formed between the side edge of the first decorative shell 122 opposite to the first end 118 and the outer surface of the first housing assembly 12.

[0471] In some implementations, the color of the first decorative shell 122 is different from the color of the first main shell 121, thereby forming a clearly defined color-blocked area at the recess 18 to enhance the aesthetics of the first shell assembly 12.

[0472] Please continue referring to Figure 33. In some embodiments, the inner surface of the first decorative shell 122 is provided with a second positioning protrusion 1221, which surrounds the edge of the first decorative shell 122. The first main shell 121 is provided with a second positioning groove 1212 that mates with the second positioning protrusion 1221. This facilitates the installation of the first decorative shell 122.

[0473] In some embodiments, the second housing assembly 13 includes a second main housing 131 and a second decorative housing 132. The second main housing 131 is connected to the second housing assembly 13. The second decorative housing 132 is mounted on the side surface of the second main housing 131 opposite to the first housing assembly 12.

[0474] Therefore, the aesthetics of the second housing assembly 13 can be enhanced by the second decorative shell 132. For example, the second device shell can cover the connection holes of the second main housing 131.

[0475] In some embodiments, a second recess 18b is formed between the side edge of the second decorative shell 132 opposite to the second end 151 and the outer surface of the second shell assembly 13.

[0476] In some implementations, the color of the second decorative shell 132 is different from the color of the second main shell 131, thereby forming a clearly defined color-blocked area at the recess 18 to enhance the aesthetics of the second shell assembly 13.

[0477] In some embodiments, the inner surface of the second decorative shell 132 is provided with a third positioning protrusion 1321, which surrounds the edge of the second decorative shell 132. The second main shell 131 is provided with a third positioning groove 1311 that mates with the third positioning protrusion 1321. This facilitates the installation of the second decorative shell 132.

[0478] Referring to Figure 34, in some embodiments, the outer casing 100 includes a first decorative shell 122. The first decorative shell 122 has a first tip 1222. A first rib 1223 and a second rib 1224 are protruding from the inner surface of the first tip 1222, and the first rib 1223 and the second rib 1224 are bent and connected together. Thus, the structural strength at the first tip 1222 can be improved by the first rib 1223 and the second rib 1224 to prevent warping at the first tip 1222 of the first decorative shell 122.

[0479] In some embodiments, the first rib 1223 extends along one edge of the first tip 1222, and the second rib 1224 extends from the other edge of the first tip 1222 to connect with the first rib 1223. Thus, the first rib 1223 and the second rib 1224 form an L-shaped structure, resulting in greater overall strength and preventing warping at the first tip 1222 of the first decorative shell 122.

[0480] For example, as mentioned above, the housing 100 may include a first housing assembly 12 and a second housing assembly 13 disposed opposite to each other. The first rib 1223 may be provided extending along the first recess 18a, and / or, the end of the first decorative shell 122 near the distal end 182 forms a first tip 1222.

[0481] Referring to Figure 35, in some embodiments, the second decorative shell 132 has a second tip 1322. A third rib 1323 and a fourth rib 1324 are protruding from the inner surface of the second tip 1322, and the third rib 1323 and the fourth rib 1324 are bent and connected together. Thus, the third rib 1323 and the fourth rib 1324 can improve the structural strength at the second tip 1322, preventing warping at the second tip 1322 of the second decorative shell 132.

[0482] In some embodiments, the third rib 1323 extends along one edge of the second tip 1322, and the fourth rib 1324 extends from the other edge of the second tip 1322 to connect with the third rib 1323. Thus, the third rib 1323 and the fourth rib 1324 form an L-shaped structure, resulting in greater overall strength and preventing warping at the second tip 1322 of the second decorative shell 132.

[0483] For example, the third rib 1323 extends along the second recess 18b, and / or the second decorative shell 132 forms a second tip 1322 at one end near the distal end 182.

[0484] In some embodiments, the first rib 1223 and the third rib 1323 are snapped together. This connection between the first rib 1223 and the third rib 1323 further prevents the first tip 1222 and the second tip 1322 from warping up.

[0485] As mentioned above, the housing 100 may also include a panel 14. One end of the panel 14 is covered at the connection between the first rib 1223 and the third rib 1323, and at least one of the first rib 1223 and the third rib 1323 is snapped and fixed to the panel to further prevent the first tip 1222 and the second tip 1322 from warping up.

[0486] Referring again to Figure 36, in some embodiments, the skin care device further includes a protective cover 900. The protective cover 900 is detachably disposed over the working area 111a (sound-emitting area 111). Thus, the protective cover 900 can provide protection for the sound-transmitting membrane 54 and / or the electrode pads 81.

[0487] For example, the protective sleeve 900 may be fitted onto the abutment section 112.

[0488] In some embodiments, the protective sleeve 900 is a silicone sleeve. Thus, the silicone sleeve provides better protection for the skin care device and also prevents the protective sleeve 900 from being too rigid and damaging the acoustic membrane 54 and / or the electrode pads 81.

[0489] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0490] The skin care device provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A skin care device, wherein, include: The outer casing has a sound-emitting area; A drive shaft assembly, which is movably disposed within the housing; and A transducer assembly is mounted at one end of the drive shaft assembly near the sound output area, and the ultrasonic focus of the transducer assembly is configured to pass through the sound output area to be directed into the skin to be treated. The drive shaft assembly is rotatably mounted within the housing about a first axis, and the ultrasonic focus of the transducer assembly is misaligned with the first axis to be configured to cause the ultrasonic focus of the transducer assembly to rotate about the first axis. The drive shaft assembly is also configured to move along the extension direction of the first axis to drive the transducer assembly to move in the extension direction of the first axis, thereby being configured to bring the transducer assembly closer to or away from the sound emission area.

2. The skin care device according to claim 1, wherein, The skin care device further includes a medium housing, which is at least partially disposed within the outer shell. The medium housing or the medium housing and the outer shell form a medium chamber. The transducer assembly is disposed within the medium chamber, and the medium chamber is configured to store an ultrasonic wave transmission medium.

3. The skin care device according to claim 2, wherein, The medium housing is provided with a second mounting hole communicating with the medium chamber, and the drive shaft of the drive shaft assembly is movably and sealingly mounted in the second mounting hole, configured to allow the drive shaft to be rotatably mounted in the housing about a first axis, and further configured to allow the drive shaft to move along the extension direction of the first axis.

4. The skin care device according to claim 2 or 3, wherein, The skin care device further includes a drive assembly disposed outside the media chamber, the drive assembly comprising: A first drive assembly, which is drively connected to the drive shaft of the drive shaft assembly to drive the drive shaft to move along the first axis; and A second drive assembly is connected to the drive shaft of the drive shaft assembly to drive the drive shaft to rotate around the first axis.

5. The skin care device according to claim 4, wherein, The first driving component is located between the second driving component and the transducer component; or, The second drive component is located between the first drive component and the transducer component.

6. The skin care device according to claim 5, wherein, When the first drive assembly is located between the second drive assembly and the transducer assembly, the peripheral side of the drive shaft is provided with a drive position, the drive position is located between the medium housing and the second drive assembly, and the first drive assembly and the drive shaft form a transmission connection at the drive position, so that the first drive assembly can drive the drive shaft to move along the first axis, and the first drive assembly allows the drive shaft to rotate around the first axis.

7. The skin care device according to claim 6, wherein, The drive position includes an annular transmission groove located on the outer periphery of the transmission shaft; The first drive assembly includes a pusher, the pusher portion of which is rotatably engaged in the transmission groove relative to the transmission shaft to form a transmission connection.

8. The skin care device according to any one of claims 5 to 7, wherein, When the second drive assembly is located between the first drive assembly and the transducer assembly, the second drive assembly is mounted on the end of the drive shaft opposite to the transducer assembly. The first drive assembly includes a first motor located on the side of the second drive assembly opposite to the transducer assembly. The circumferential side of the drive shaft has a transmission groove located between the medium housing and the second drive assembly. The drive assembly also includes a pusher, one end of which is rotatably engaged in the transmission groove relative to the drive shaft to form a transmission connection. The other end of the pusher is transmissionally connected to the first motor, configured such that the first motor pushes the drive shaft to move along the first axial direction via the pusher; or When the second drive assembly is located between the first drive assembly and the transducer assembly, a transmission groove is provided on the peripheral side of the end of the drive shaft opposite to the transducer assembly. The first drive assembly includes a first motor and a pusher. One end of the pusher is rotatably engaged in the transmission groove relative to the drive shaft to form a transmission connection. The other end of the pusher is transmissionally connected to the first motor and is configured such that the first motor pushes the drive shaft to move along the first axis direction through the pusher. The second drive assembly includes a first gear, a second gear, and a second motor. The first gear can rotate synchronously and is relatively slidably sleeved on the drive shaft. The second gear meshes with the first gear. The output shaft of the second motor is fixedly connected to the first gear.

9. The skin care device according to any one of claims 5 to 7, wherein, When the first drive assembly is located between the second drive assembly and the transducer assembly, the second drive assembly includes a second motor, the output shaft of the second motor being drively connected to the drive shaft relatively movable along the first axis, such that the second motor is configured to drive the drive shaft to rotate synchronously about the first axis via the output shaft, and is configured such that the drive shaft is movable relative to the output shaft of the second motor along the first axis.

10. The skin care device according to claim 9, wherein, The second drive assembly includes an adapter fixedly connected to the output shaft of the second motor. The adapter has a transmission hole extending along the first axis. The transmission hole is non-circular. One end of the drive shaft opposite to the sound output area is slidably disposed within the transmission hole along the first axis. Alternatively... The second drive assembly includes an adapter fixedly connected to the output shaft of the second motor. The adapter has a first transmission notch, and the drive shaft has a second transmission notch that engages with the first transmission notch; or The output shaft of the second motor is provided with a first transmission notch, and the transmission shaft is provided with a second transmission notch that cooperates with the first transmission notch.

11. The skin care device according to any one of claims 1 to 10, wherein, The transducer assembly includes an ultrasonic transducer, which is inclined relative to the first axis so that the ultrasonic focal point of the transducer assembly is misaligned with the first axis; or The transducer assembly includes an ultrasonic transducer, which is eccentrically disposed with respect to the first axis, such that the ultrasonic focal point of the transducer assembly is misaligned with the first axis.

12. The skin care device according to claim 11, wherein, The transducer assembly is rotatably mounted about a second axis to the drive shaft assembly and is configured to allow the transducer assembly to rotate relative to the drive shaft assembly about the second axis as the drive shaft assembly drives the transducer assembly to rotate, in order to avoid wire tangling. or When the axis of the ultrasonic transducer is inclined to the first axis, the drive shaft assembly has a lead hole extending along the extension direction of the first axis, and the electrical connection wires connected to the transducer assembly are led out from the lead hole to avoid tangling during the process of the drive shaft assembly driving the transducer assembly to rotate.

13. The skin care device according to any one of claims 1 to 12, wherein, The drive shaft assembly has a first support surface at one end near the sound output area. The first support surface is inclined to the first axis. The transducer assembly is mounted on the first support surface so that the transducer assembly is inclined to the first axis.

14. The skin care device according to claim 13, wherein, The transducer assembly is movably mounted on the first support surface such that the distance between the ultrasonic focal point of the transducer assembly and the first axis is adjustable, and / or, the transducer assembly is rotatably mounted on the first support surface along a third axis such that the angle between the transducer assembly and the first support surface is adjustable; and / or The inclination angle between the first support surface and the first axis is adjustable.

15. The skin care device according to claim 13 or 14, wherein, The transducer assembly is rotatably mounted on the first support surface about a second axis to avoid wire tangling during the rotation of the transducer assembly driven by the drive shaft assembly.

16. The skin care device according to claim 15, wherein, One of the first support surface and the transducer assembly is provided with a first mounting hole, and the other is provided with a mounting shaft. The mounting shaft is rotatably mounted in the first mounting hole along the second axis, so that the transducer assembly is rotatably mounted on the first support surface about the second axis, and the second axis is inclined to the first axis.

17. The skin care device according to claim 16, wherein, The transducer assembly includes a bearing disposed between the mounting shaft and the inner wall of the first mounting hole; or The transducer assembly includes a first fastener, a sliding ring, and a sliding washer. The first fastener includes a connecting portion and a clamping portion. The sliding ring is sleeved between the mounting shaft and the inner wall of the first mounting hole. The sliding washer is sleeved outside the mounting shaft. One side of the sliding washer abuts against the first support surface, and the other side abuts against the sliding ring. The connecting portion is connected to the mounting shaft so that the clamping portion presses against the sliding ring. The clamping portion also forms a sliding ring groove with the first support surface, and the wall of the first mounting hole is rotatably limited outside the sliding ring groove.

18. The skin care device according to claim 17, wherein, The mounting shaft is disposed on the first support surface. The transducer assembly includes a first mounting bracket and an ultrasonic transducer. The ultrasonic transducer is mounted on the first mounting bracket. The first mounting bracket has a first side surface opposite to the first support surface. A side protrusion is provided on the first side surface. The first mounting hole is disposed on the side protrusion and penetrates through the first mounting bracket; and / or The sliding ring and sliding pad are made of metal.

19. The skin care device according to any one of claims 15 to 18, wherein, The transducer assembly includes a first mounting bracket and an ultrasonic transducer. The first mounting bracket is rotatably mounted on the first support surface along a second axis. The first mounting bracket has a first side opposite to the first support surface and a second side opposite to the first side. The ultrasonic transducer is mounted on the second side.

20. The skin care device according to claim 19, wherein, The first support surface is provided with a mounting shaft, and the first side surface is provided with a first mounting hole penetrating the first mounting bracket. The mounting shaft is rotatably mounted in the first mounting hole along a second axis inclined to the first axis, so that the ultrasonic transducer is rotatably mounted on the first support surface. The transducer assembly further includes a first fastener, which is fixedly connected to the mounting shaft from the second side surface to restrict the first mounting bracket from moving away from the first support surface along the second axis; and / or The second side is a bearing surface, which is provided with a clearance groove, the bottom of which is spaced from the ultrasonic transducer; and / or The second side is a bearing surface, which is provided with a receiving groove, and the ultrasonic transducer is disposed within the receiving groove; and / or The first mounting bracket includes a support portion and a first engaging portion. The support portion has a first side surface and a second side surface. The first engaging portion protrudes from the second side surface and engages with the ultrasonic transducer to fix the ultrasonic transducer to the support portion; and / or The ultrasonic transducer has an electrical connection line on the side facing the second side, and the second side has a wiring notch through which the electrical connection line is routed.

21. The skin care device according to any one of claims 15 to 20, wherein, The drive shaft assembly includes a drive shaft having the first axis and a transmission component mounted on the drive shaft, wherein the first support surface is located at the end of the transmission component opposite to the drive shaft.

22. The skin care device according to claim 21, wherein, The drive shaft is disposed within the transmission member at one end near the transmission member. The drive shaft assembly further includes a second fastener, which passes through the drive shaft and the transmission member to connect and fix the drive shaft and the transmission member; and / or, The transmission component is provided with a limiting groove and a clearance groove. The clearance groove is located on the side of the limiting groove away from the first support surface. Both the limiting groove and the clearance groove penetrate the outer surface of the transmission component to one side to form a mounting opening. The clearance groove also penetrates the outer surface of the transmission component to the side away from the limiting groove. One end of the transmission shaft is formed with a limiting protrusion. One end of the transmission shaft is located inside the transmission component through the mounting opening, and the limiting protrusion is limited to the limiting groove.

23. The skin care device according to claim 22, wherein, The transmission component also has a mounting surface and a connecting ring surface connecting the mounting surface and the first support surface, the mounting surface and the first support surface being inclined to each other; the limiting groove extends from the connecting ring surface toward the transmission component, the avoidance groove extends from the mounting surface through the limiting groove, and the avoidance groove penetrates through the connecting ring surface on one side where the opening of the limiting groove is located to form a side groove, the side groove and the opening of the limiting groove together form the mounting opening.

24. The skin care device according to any one of claims 2 to 23, wherein, A pressure regulating component is provided in the medium chamber, and the pressure regulating component is configured to regulate the pressure in the medium chamber.

25. The skin care device according to claim 24, wherein, The pressure regulating component includes at least one of a pressure regulating valve and an elastic deformation component; wherein, the elastic deformation component includes a first top wall and a second annular wall, the first top wall being disposed within the medium chamber, the second annular wall being at least partially disposed within the medium chamber, the second annular wall surrounding the first top wall to form a deformable cavity between the first top wall and the second annular wall, the deformable cavity forming a communicating opening at one end opposite to the first top wall, the communicating opening communicating with the outside of the medium chamber; and... The thickness of the second annular wall is less than the thickness of the first top wall; and / or At least one of the second annular wall and the first top wall has a smooth surface; and / or The surfaces of at least one of the second annular wall and the first top wall are wrinkle-free; and / or The skin care device further includes a first limiting member, which is at least partially disposed at the communication opening to be configured to limit the deformation of the elastically deformable member away from the communication opening to the communication opening; and / or The elastic deformation component is a rubber part; and / or The Shore hardness coefficient of the elastic deformation component is 40-60HR.

26. The skin care device according to claim 24, wherein, The pressure regulating component includes an elastic deformation component, a first top wall and a second annular wall. The first top wall is disposed in the medium chamber, and the second annular wall is at least partially disposed in the medium chamber. The second annular wall surrounds the first top wall to form a deformable cavity between the first top wall and the second annular wall. The deformable cavity forms a communicating opening at one end away from the first top wall, and the communicating opening communicates with the outside of the medium chamber. The drive shaft assembly includes a drive shaft passing through the medium housing. The drive shaft is movable along a first axis to drive the transducer assembly to move along the first axis, thereby moving closer to or away from the sound output area. The skin care device is configured to have at least two preset depth modes, in which the drive shaft moves to different positions along the first axis so that the volume of the portion of the drive shaft inserted into the medium chamber is different. In all the depth modes, the difference between the maximum and minimum volumes of the drive shaft inserted into the medium cavity is V1, the volume of the deformable cavity is V2, and the ratio of V1 to V2 is 3-10.

27. The skin care device according to any one of claims 2 to 26, wherein, The skin care device also includes: A drive assembly, disposed on the side of the transducer assembly opposite to the sound output region, is drively connected to the drive shaft assembly and configured to drive the drive shaft assembly to rotate about and / or move along the first axis; and The second circuit board assembly includes a second circuit board and a third circuit board, which are stacked on the side of the drive assembly away from the transducer assembly.

28. The skin care device according to claim 27, wherein, The second circuit board assembly further includes a power interface and a transformer, both of which are mounted on the second circuit board. The power interface is configured to be electrically connected to an external power source, and the transformer is electrically connected to the transducer assembly to drive the transducer assembly. The third circuit board is electrically connected to the second circuit board so that the second circuit board can transmit a portion of the electrical energy input from the external power source to the third circuit board. The third circuit board is electrically connected to the drive component to drive the drive component.

29. The skin care device according to any one of claims 2 to 28, wherein, The medium housing is further provided with a second mounting hole, and the drive shaft assembly includes a drive shaft and a second seal. The drive shaft is movably and sealed in the second mounting hole through the second seal, so that one end of the drive shaft extends into the medium chamber. The second seal is disposed between the inner wall of the second mounting hole and the peripheral surface of the drive shaft. The second seal includes an inner ring sealing portion surrounding the drive shaft, the inner ring sealing portion being elastic to fit tightly against the peripheral surface of the drive shaft, and / or, the second seal further includes an elastic element configured to drive the inner ring sealing portion to fit tightly against the peripheral surface of the drive shaft.

30. The skin care device according to any one of claims 1 to 29, wherein, The housing includes a first end face with a sound-emitting area and a third side face bent and connected to the first end face; the skin care device further includes: An electrical stimulation assembly includes an electrode pad located at least partially on a first end face and at least partially on a third side face, the electrode pad being configured to contact the skin to be treated to output a current to the skin to be treated.

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