Ultrasonic treatment head and treatment instrument

Abstract

The utility model discloses an ultrasonic treatment head and a treatment instrument, and relates to the technical field of ultrasonic treatment, the ultrasonic treatment head comprises a bottom shell, a cover body and a transducer, the bottom shell is provided with a sound transmission port; the cover body is connected with the bottom shell, a liquid containing cavity is defined by the cover body and the bottom shell, and the liquid containing cavity is filled with a sound conducting medium; the energy converter is mounted in the liquid containing cavity and is suitable for transmitting ultrasonic energy outwards through the sound transmission opening; wherein the cover body comprises a top wall provided with a liquid injection channel, the top wall comprises a first inner wall surface and at least one second inner wall surface, the distance from the first inner wall surface to the sound transmission opening is larger than the distance from the second inner wall surface to the sound transmission opening, and the liquid injection channel is located on the first inner wall surface. According to the technical scheme provided by the utility model, bubbles are not easy to remain in the liquid containing cavity filled with the sound conducting medium in the ultrasonic therapeutic apparatus when water is injected, and the normal conduction of ultrasonic waves is prevented from being influenced by the bubbles.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an ultrasonic treatment head and treatment device. Background Technology

[0002] As people's pursuit of beauty continues to increase, cosmetic medicine has become the most popular plastic surgery procedure. More and more people are choosing cosmetic surgery to improve their appearance, leading to the rapid development of the cosmetic medicine industry. Among these procedures, ultrasound therapy devices are commonly used in cosmetic medicine. These devices use ultrasound transducers to emit ultrasound waves to treat the skin, reducing fat and accelerating healing, thereby achieving therapeutic effects. To ensure that the sound energy emitted by the transducer is precisely focused, the transducer needs to be immersed in a sound-conducting medium to improve the transmission efficiency of the ultrasound waves.

[0003] However, in existing ultrasound therapy devices, when water is injected into the cavity containing the sound-conducting medium, large air bubbles often cannot be expelled in time due to structural limitations. These air bubbles may move to the sound-transmitting window during treatment, causing abnormal energy output from the ultrasound therapy device, potentially leading to equipment damage or even injury. Utility Model Content

[0004] The main purpose of this invention is to provide an ultrasonic therapy head and device, which aims to make it less likely for air bubbles to remain in the liquid cavity containing the sound-conducting medium inside the ultrasonic therapy device when water is injected, thereby avoiding the impact of air bubbles on the normal conduction of ultrasound.

[0005] To achieve the above objectives, this utility model proposes an ultrasonic therapy head, comprising:

[0006] A bottom shell, on which a sound-permeable opening is provided;

[0007] A cover body, which is connected to the bottom shell and forms a liquid-containing cavity, the liquid-containing cavity being filled with a sound-conducting medium;

[0008] A transducer, which is installed in the liquid-containing cavity and adapted to emit ultrasonic energy outward through the sound-transmitting port;

[0009] The cover includes a top wall with an injection channel. The top wall includes a first inner wall surface and at least one second inner wall surface. The distance from the first inner wall surface to the sound-transmitting opening is greater than the distance from the second inner wall surface to the sound-transmitting opening. The injection channel is located on the first inner wall surface.

[0010] In one embodiment, the cover also has a sidewall that is angled to the top wall, the sidewall having a protrusion that smoothly transitions to the sidewall.

[0011] In one embodiment, the protrusions include a plurality of protrusions, which are spaced apart circumferentially along the sidewall.

[0012] In one embodiment, at least one of the second inner wall surfaces is disposed between two adjacent protrusions and connected to the two adjacent protrusions;

[0013] And / or, the injection channel is located between two adjacent protrusions.

[0014] In one embodiment, the first inner wall surface and the second inner wall surface have a smooth transition.

[0015] In one embodiment, the protrusion and the sidewall facing away from the top wall have a connecting surface, the connecting surface has a connecting hole, and the bottom shell has a mounting hole corresponding to the connecting hole. The connecting hole and the mounting hole are used for screw connection between the cover and the bottom shell.

[0016] In one embodiment, the ultrasonic treatment head further includes a sealing ring disposed between the bottom shell and the cover, and surrounding the connection hole.

[0017] In one embodiment, the cross-sectional area of ​​the injection channel gradually decreases from the end closer to the sound-transmitting port to the end farther away from the sound-transmitting port.

[0018] In one embodiment, the cavity wall of the injection channel has a smooth transition with the first inner wall surface.

[0019] In one embodiment, the therapeutic device includes an ultrasonic treatment head and a handle as described above, the ultrasonic treatment head and the handle being electrically connected.

[0020] In this invention, a bottom shell and a cover body enclose a liquid-containing cavity for storing a sound-conducting medium. The top wall of the cover body has a first inner wall surface and at least one second inner wall surface. There is a certain height difference between the first and second inner wall surfaces. The first inner wall surface is farther from the sound-transmitting opening than the second inner wall surface. The injection channel is located on the first inner wall surface. When the sound-conducting medium is injected into the liquid-containing cavity, the ultrasonic treatment head is in a horizontal state. The liquid level of the sound-conducting medium gradually rises from the sound-transmitting opening of the bottom shell to the cover body. Because the injection channel is located on the first inner wall surface, which is farther from the sound-transmitting opening, air bubbles will converge towards the injection channel located on the first inner wall surface, making it easier for them to be discharged from the injection channel and avoiding treatment abnormalities caused by air bubbles remaining in the liquid-containing cavity. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This invention provides a schematic diagram of the structure of an ultrasonic treatment head in one embodiment;

[0023] Figure 2 This invention provides a schematic diagram of the structure of the cover in one embodiment;

[0024] Figure 3 This invention provides a schematic diagram of the bottom shell structure in one embodiment;

[0025] Figure 4 A cross-sectional schematic diagram of an ultrasonic treatment head in one embodiment of this utility model is provided.

[0026] Explanation of icon numbers:

[0027] 100. Ultrasonic treatment head; 1. Base shell; 11. Protrusion; 12. Mounting surface; 13. Mounting hole; 14. Limiting groove; 15. Sealing ring; 151. Main body; 152. Surrounding part; 16. Sound transmission port; 2. Cover; 21. Top wall; 211. First inner wall surface; 212. Second inner wall surface; 213. Liquid injection channel; 214. Insertion hole; 22. Side wall; 23. Protrusion; 24. Connecting surface; 241. Connecting hole; 3. Liquid-containing cavity; 4. Transducer.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0030] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] In related technologies, when water is injected into the cavity containing the sound-conducting medium in an ultrasonic therapy device, large air bubbles often cannot be expelled in time due to structural limitations. These air bubbles may move to the sound-transmitting window during treatment, causing abnormal energy output from the ultrasonic therapy device, potentially leading to equipment damage or even injury.

[0033] Please refer to the reference. Figures 1 to 4 As shown, this utility model proposes an ultrasonic treatment head 100, including a bottom shell 1, a cover 2, and a transducer 4. The bottom shell 1 has a sound-transmitting port 16. The cover 2 and the bottom shell 1 are connected and enclose a liquid-containing cavity 3, which is filled with a sound-conducting medium. The transducer 4 is installed in the liquid-containing cavity 3 and is adapted to emit ultrasonic energy outward through the sound-transmitting port 16. The cover 2 includes a top wall 21 with a liquid injection channel 213. The top wall 21 includes a first inner wall surface 211 and at least one second inner wall surface 212. The distance from the first inner wall surface 211 to the sound-transmitting port 16 is greater than the distance from the second inner wall surface 212 to the sound-transmitting port 16. The liquid injection channel 213 is located on the first inner wall surface 211.

[0034] In this embodiment, the bottom shell 1 and the cover 2 enclose a liquid cavity 3. The liquid injection channel 213 of the cover 2 is used to inject a sound-conducting medium into the liquid cavity 3. The transducer 4 is installed in the liquid cavity 3. The ultrasonic energy emitted by the transducer 4 is conducted through the sound-conducting medium and emitted outward through the sound-transmitting port 16 for treatment. The top wall 21 of the cover 2 includes a first inner wall surface 211 and at least one second inner wall surface 212. There is a certain height difference between the first inner wall surface 211 and the second inner wall surface 212. The first inner wall surface 211 is farther away from the sound-transmitting port 16 than the second inner wall surface 212. The liquid injection channel 213 is disposed on the first inner wall surface 211. When the sound-conducting medium is injected into the liquid cavity 3, the ultrasonic treatment head 100 is in a horizontal state. The liquid level of the sound-conducting medium gradually rises from the sound-transmitting port 16 of the bottom shell 1 to the cover 2. Since the injection channel 213 is set on the first inner wall surface 211, which is farther away from the sound-transmitting port 16, the liquid level of the sound-conducting medium will reach the second inner wall surface 212 first. At this time, the air in the liquid cavity 3 will gather towards the first inner wall surface 211 and be discharged from the injection channel 213, so as to avoid the presence of air bubbles in the liquid cavity 3, which would affect the normal transmission of ultrasound by the sound-conducting medium.

[0035] Understandably, the sound-conducting medium, in addition to its function of conducting ultrasonic waves, also has a heat dissipation function, which can reduce the operating temperature of the transducer 4 and improve the stability of the transducer 4's operation. Generally, the ultrasonic treatment head 100 has related electronic components on the outside of the bottom shell 1 and the cover 2. In order to minimize the overall volume of the ultrasonic treatment head 100, the surfaces of the bottom shell 1 and the cover 2 are irregularly arranged at different heights to avoid obstruction of the related electronic components. Therefore, the outer surface of the cover 2 includes multiple outer wall surfaces arranged at different heights. Correspondingly, while keeping the wall thickness of the cover 2 constant, the top wall 21 of the cover 2 includes a first inner wall surface 211 and a second inner wall surface 212 arranged at different heights. This arrangement allows the cover 2 and the shell to enclose a sufficiently large liquid cavity 3 within a limited space. The liquid cavity 3 can accommodate more sound-conducting medium to improve the heat dissipation effect on the transducer 4. In actual implementation, the sound-permeable opening 16 of the bottom shell 1 is covered with a sound-permeable film to ensure the sealing of the liquid cavity 3 at the sound-permeable opening 16. In actual implementation, a decorative shell is also provided on the outside of the cover 2 and the bottom shell 1. The decorative shell is used to accommodate related electronic devices.

[0036] In actual implementation, there may be multiple second inner wall surfaces 212. These multiple second inner wall surfaces 212 may be located on the same plane or on different planes. The number and structure of the second inner wall surfaces 212 can be set according to actual usage requirements.

[0037] Understandably, after the acoustic medium is injected, it will fill the entire fluid cavity 3. When the ultrasonic treatment head 100 is running, the transducer 4 will dissipate heat. Due to the thermal expansion and contraction effect, the acoustic medium will expand, causing an increase in the pressure inside the fluid cavity 3. Therefore, the cover 2 is provided with an insertion hole 214 for the balance tube to extend into. The balance tube can balance the expansion of the acoustic medium through deformation, thereby balancing the internal pressure of the fluid cavity 3. Optionally, the insertion hole 213 is provided on the first inner wall surface 211. This can prevent the pressure of the acoustic medium from causing the balance tube to deform when the acoustic medium is injected into the fluid cavity 3, thus preventing it from affecting the expansion resistance of the balance tube during subsequent use of the ultrasonic treatment head 100.

[0038] In one embodiment of this utility model, such as Figure 2 As shown, the cover 2 also has a side wall 22 that is connected to the top wall 21 at an angle. The side wall 22 is provided with a protrusion 23, and the protrusion 23 and the side wall 22 are smoothly transitioned.

[0039] In this embodiment, the side wall 22 and the top wall 21 are connected at an angle, and the side wall 22 protrudes to form a protrusion 23. When the cover 2 and the bottom shell 1 are combined and connected, the protrusion 23 abuts against the bottom shell 1 to increase the contact area between the cover 2 and the bottom shell 1, reduce the installation difficulty of the cover 2 and the bottom shell 1, and improve the stability of the connection between the cover 2 and the bottom shell 1.

[0040] The convex part 23 and the side wall 22 have a smooth transition to avoid forming a sharp angle between the convex part 23 and the side wall 22, thereby reducing the possibility of residual air bubbles at the connection between the convex part 23 and the side wall 22 when the sound-conducting medium is injected into the liquid cavity 3, and avoiding affecting the normal transmission of ultrasound.

[0041] In actual implementation, the protrusion 23 and the sidewall 22 are integrally formed. The protrusion 23 is formed by protruding from the sidewall 22 into the liquid cavity 3. Correspondingly, the bottom shell 1 has a protrusion 11 corresponding to the protrusion 23. The protrusion 11 is formed by protruding inward from the shell wall of the bottom shell 1. When the cover 2 and the bottom shell 1 are connected, the end face of the protrusion 23 abuts against the end face of the protrusion 11. It can be understood that the sidewall 22 protrudes into the cavity to form the protrusion 23. Correspondingly, the sidewall 22 forms a recess on the surface outside the cavity to avoid obstructing external electronic devices, thereby improving the overall space utilization of the ultrasonic therapy device.

[0042] In one embodiment of this utility model, such as Figure 2 As shown, the protrusions 23 include a plurality of protrusions 23, which are spaced apart circumferentially along the sidewall 22.

[0043] In this embodiment, multiple protrusions 23 are included to further increase the contact area between the cover 2 and the bottom shell 1, thereby improving the stability of the connection between the cover 2 and the bottom shell 1. Each protrusion 23 has a smooth transition with the side wall 22, reducing the possibility of residual air bubbles between the protrusion 23 and the side wall 22. At the same time, the multiple protrusions 23 are arranged circumferentially along the side wall 22, which can improve the uniformity of force when the cover 2 and the bottom shell 1 are connected, thereby ensuring the sealing effect between the cover 2 and the bottom shell 1. Optionally, the top wall 21, the side wall 22, and the protrusions 23 are integrally formed.

[0044] In one embodiment of this utility model, such as Figure 2 As shown, at least one second inner wall surface 212 is disposed between two adjacent protrusions 23 and connected to the two adjacent protrusions 23; and / or, an injection channel 213 is disposed between two adjacent protrusions 23.

[0045] In this embodiment, when the sound-conducting medium is injected into the liquid cavity 3, as the liquid level of the medium rises, the gas in the liquid cavity 3 will converge towards the top wall 21. A narrow space is formed between the two adjacent protrusions 23 and the top wall 21, and some gas may remain in this narrow space. Therefore, at least one second inner wall surface 212 is provided between the two adjacent protrusions 23. The second inner wall surface 212 also abuts against the two adjacent protrusions 23, so that the liquid level of the sound-conducting medium first reaches the second inner wall surface 212 between the two adjacent protrusions 23 during the injection process, guiding the gas to the injection channel 213 provided on the first inner wall surface 211. This avoids gas remaining between the two protrusions 23 and forming bubbles, which would affect the sound-conducting effect of the ultrasound therapy device. It is understandable that when the injection channel 213 is provided between the two adjacent protrusions 23, since the gas will be directly discharged from the injection channel 213 and will not remain between the two protrusions 23, there is no need to provide a second inner wall surface 212 between the two protrusions 23.

[0046] Optionally, the second inner wall surface 212 may be inclined towards the injection channel 213, so that the gas in the liquid-containing cavity 3 can more easily converge into the injection channel 213. In actual implementation, the second inner wall surface 212 is located at the periphery of the top wall 21, and the injection channel 213 is located in the middle of the top wall 21, so that the gas can converge into the injection channel 213 from all sides and be discharged from the injection channel 213.

[0047] In one embodiment of this utility model, such as Figure 2 As shown, the first inner wall surface 211 and the second inner wall surface 212 have a smooth transition.

[0048] In this embodiment, due to the height difference between the first inner wall surface 211 and the second inner wall surface 212, a smooth transition is made at the junction of the first inner wall surface 211 and the second inner wall surface 212 to avoid gas residue in the liquid cavity 3 at the corner of the first inner wall surface 211 and the second inner wall surface 212. This smooth transition between the second inner wall surface 212 and the second inner wall surface 212 allows gas to flow smoothly from the second inner wall surface 212 to the injection channel 213 of the first inner wall surface 211, thereby reducing the possibility of gas residue in the liquid cavity 3. Optionally, the first inner wall surface 211 can be inclined towards the injection channel 213 to facilitate gas collection into and discharge from the injection channel 213.

[0049] In one embodiment of this utility model, such as Figures 2 to 4 As shown, the protrusion 23 and the side wall 22 are provided with a connecting surface 24 on the side facing away from the top wall 21. The connecting surface 24 is provided with a connecting hole 241. The bottom shell 1 is provided with a mounting hole 13 corresponding to the connecting hole 241. The connecting hole 241 and the mounting hole 13 are used for screw connection between the cover 2 and the bottom shell 1.

[0050] In this embodiment, the end faces of the protrusion 23 and the side wall 22 facing the bottom shell 1 are located in the same plane. The end face forms a connecting surface 24 that abuts against the bottom shell 1. A connecting hole 241 is provided on the connecting surface 24. Correspondingly, the bottom shell 1 is provided with a mounting hole 13. When the cover 2 and the bottom shell 1 are enclosed to form a liquid cavity 3, the connecting hole 241 of the connecting surface 24 and the mounting hole 13 of the bottom shell 1 are coaxially arranged. Screws are inserted through the connecting hole 241 and the mounting hole 13 to fasten the cover 2 and the bottom shell 1.

[0051] Understandably, the connecting hole 241 and the mounting hole 13 can be threaded holes to facilitate screw connection. The connecting surface 24 is formed by the protrusion 23 and the side wall 22 facing away from the top wall 21, so that the connecting surface 24 has a sufficiently large area to ensure that the enclosure structure of the connecting hole 241 is sufficiently strong, further improving the stability of the connection between the cover 2 and the bottom shell 1.

[0052] Optionally, the shell wall of the bottom shell 1 and the end face of the inwardly protruding protrusion 11 form a mounting surface 12, and a mounting hole 13 is provided on the mounting surface 12 to ensure the robustness of the enclosure structure of the mounting hole 13. When the cover 2 and the bottom shell 1 are combined, the connecting surface 24 and the mounting surface 12 abut against each other to increase the area of ​​the connecting surface 24 between the cover 2 and the bottom shell 1 and improve the stability of the connection between the cover 2 and the bottom shell 1.

[0053] In one embodiment of this utility model, such as Figures 2 to 4 As shown, the ultrasonic treatment head 100 also includes a sealing ring 15, which is disposed between the bottom shell 1 and the cover 2 and surrounds the connection hole 241.

[0054] In this embodiment, a sealing ring 15 is also provided between the bottom shell 1 and the cover 2 to increase the sealing between the bottom shell 1 and the cover 2 and prevent leakage of the sound-conducting medium. It is understood that the sealing ring 15 is disposed along the side wall 22 and surrounds the connection hole 241 at the location of the connection hole 241 to prevent leakage of the sound-conducting medium at the connection hole 241 and the mounting hole 13. Optionally, the sealing ring 15 includes a main body 151 and a plurality of surrounding portions 152. The main body 151 is disposed around the opening of the cover 2 and the bottom shell 1, and the surrounding portions 152 are disposed on the main body 151 and surround the connection hole 241. The main body 151 and the surrounding portions 152 may be integrally formed.

[0055] In practical implementation, the bottom shell 1 and / or the cover 2 are provided with a limiting groove 14 corresponding to the sealing ring 15. The sealing ring 15 is confined within the limiting groove 14, which is beneficial for the positioning and installation of the sealing ring 15, and effectively avoids poor sealing due to the position of the sealing ring 15. In another embodiment, the bottom shell 1 is provided with a limiting groove 14, and the sealing ring 15 is confined within the limiting groove 14 and partially extends out of the limiting groove 14. When the bottom shell 1 and the cover 2 are combined, the connecting surface 24 of the cover 2 tightly presses against the sealing ring 15, thereby achieving a seal between the cover 2 and the bottom shell 1.

[0056] In one embodiment of this utility model, such as Figure 2 As shown, the cross-sectional area of ​​the injection channel 213 gradually decreases from the end near the sound-transmitting port 16 to the end away from the sound-transmitting port 16.

[0057] In this embodiment, the injection channel 213 is configured with a variable cross-section, and its cross-sectional area gradually decreases from the end near the sound-transmitting port 16 to the end away from the sound-transmitting port 16. When the sound-conducting medium is injected, it is beneficial to guide the gas in the liquid-containing cavity 3 to the injection channel 213.

[0058] Understandably, after the injection is completed, the injection channel 213 is sealed from the outside of the liquid chamber 3 by a sealing plug. The sealing plug has a certain degree of elasticity and is installed in the injection channel 213 by interference fit. Due to the variable cross-section of the injection channel 213, the sealing plug is not easy to fall off the injection channel 213 after it is inserted into the opening of the injection channel 213.

[0059] In one embodiment of this utility model, such as Figure 2 As shown, the cavity wall of the injection channel 213 has a smooth transition with the first inner wall surface 211.

[0060] In this embodiment, the connection between the injection channel 213 and the first inner wall surface 211 is smoothly transitioned so that the gas reaching the first inner wall surface 211 can be guided into the injection channel 213, which is beneficial to the exhaust of gas in the liquid chamber 3 during injection.

[0061] Understandably, in this application, a smooth transition refers to a curved transition at the connection point to avoid forming a sharp angle at the connection between two different surfaces, which would be detrimental to the discharge of air bubbles.

[0062] This utility model also proposes a therapeutic device, which includes an ultrasonic treatment head 100 and a handle. The specific structure of the ultrasonic treatment head 100 is as described in the above embodiments. Since this therapeutic device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. In actual implementation, the ultrasonic treatment head 100 is installed on the handle and electrically connected to the treatment host. The physician can set the treatment time, treatment intensity, etc. through the treatment host. Optionally, a radiofrequency electrode can also be provided on the ultrasonic treatment head to perform ultrasonic treatment and radiofrequency treatment simultaneously.

[0063] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An ultrasonic therapy head, characterized in that, include: A bottom shell, on which a sound-permeable opening is provided; A cover body, which is connected to the bottom shell and forms a liquid-containing cavity, the liquid-containing cavity being filled with a sound-conducting medium; A transducer, which is installed in the liquid-containing cavity and adapted to emit ultrasonic energy outward through the sound-transmitting port; The cover includes a top wall with an injection channel. The top wall includes a first inner wall surface and at least one second inner wall surface. The distance from the first inner wall surface to the sound-transmitting opening is greater than the distance from the second inner wall surface to the sound-transmitting opening. The injection channel is located on the first inner wall surface.

2. The ultrasonic treatment head as described in claim 1, characterized in that, The cover also has a sidewall that is connected at an angle to the top wall, the sidewall having a protrusion and the protrusion and the sidewall having a smooth transition.

3. The ultrasonic treatment head as described in claim 2, characterized in that, The protrusions include a plurality of protrusions, which are spaced apart circumferentially along the sidewall.

4. The ultrasonic treatment head as described in claim 3, characterized in that, At least one of the second inner wall surfaces is disposed between two adjacent protrusions and is connected to the two adjacent protrusions; And / or, the injection channel is located between two adjacent protrusions.

5. The ultrasonic treatment head as described in claim 3, characterized in that, The first inner wall surface and the second inner wall surface have a smooth transition.

6. The ultrasonic treatment head as described in claim 2, characterized in that, The protrusion and the sidewall facing away from the top wall have a connecting surface with a connecting hole. The bottom shell has a mounting hole corresponding to the connecting hole. The connecting hole and the mounting hole are used for screw connection between the cover and the bottom shell.

7. The ultrasonic treatment head as described in claim 6, characterized in that, The ultrasonic treatment head also includes a sealing ring, which is disposed between the bottom shell and the cover and surrounds the connection hole.

8. The ultrasonic treatment head according to any one of claims 1 to 7, characterized in that, The cross-sectional area of ​​the injection channel gradually decreases from the end closer to the sound-transmitting port to the end farther away from the sound-transmitting port.

9. The ultrasonic treatment head as described in claim 8, characterized in that, The cavity wall of the injection channel has a smooth transition with the first inner wall surface.

10. A therapeutic device, characterized in that, The therapeutic device includes an ultrasonic treatment head and a handle as described in any one of claims 1 to 9, wherein the ultrasonic treatment head and the handle are electrically connected.

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