Ultrasonic treatment head and ultrasonic treatment instrument

Abstract

The utility model discloses an ultrasonic treatment head and an ultrasonic treatment instrument, and relates to the technical field of ultrasonic medical treatment, the ultrasonic treatment head comprises a housing, a transducer assembly, a sound transmission film and a pressure relief film; a containing cavity is formed in the shell, and a treatment window and a pressure relief window which are communicated with the containing cavity are formed in the two ends of the shell respectively; the sound transmission membrane covers the treatment window; the transducer assembly is arranged in the containing cavity and emits ultrasonic waves towards the treatment window. The pressure relief film covers the pressure relief window in a sealing mode, the pressure relief film protrudes in the direction away from the containing cavity to form an expansion part, and the expansion part is located at the position, close to the edge, of the pressure relief film; the containing cavity is filled with a sound conducting medium, and the sound conducting medium expands when heated and extrudes the pressure relief film to expand in the direction away from the containing cavity. According to the ultrasonic treatment head provided by the utility model, the pressure relief window and the pressure relief film are arranged, so that the problem that the sound transmission film protrudes outwards and even is broken due to the gradually expanded sound conducting medium is solved, and the stability and the safety of ultrasonic treatment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic medical treatment, and particularly relates to an ultrasonic treatment head and an ultrasonic therapeutic apparatus. Background Art

[0002] In the field of ultrasonic medical treatment, as a key component, the ultrasonic treatment head undertakes the important task of converting electrical energy into ultrasonic waves and transmitting them to human tissues. Existing ultrasonic treatment heads generally include a transducer, a sound-transmitting membrane, and a sound-guiding medium filled inside the treatment head. When the transducer works, it generates heat, and the function of the sound-guiding medium is to absorb this heat, protect the transducer, and ensure the effective transmission of sound waves.

[0003] However, after absorbing heat, the sound-guiding medium will expand, and this expansion will exert an additional pressure on the sound-transmitting membrane, causing the sound-transmitting membrane to protrude from the window of the treatment head, affecting ultrasonic focusing and treatment effects. Moreover, long-term or high-intensity ultrasonic treatment may cause the sound-guiding medium to expand to the extent that it bursts the sound-transmitting membrane, which will not only reduce the service life of the treatment head but also pose a safety hazard during the treatment process. Summary of the Utility Model

[0004] The main purpose of the utility model is to propose an ultrasonic treatment head and an ultrasonic therapeutic apparatus, aiming to solve the problem that the sound-transmitting membrane expands outward due to the heat absorption and expansion of the sound-guiding medium during ultrasonic treatment.

[0005] To achieve the above purpose, the ultrasonic treatment head proposed by the utility model includes a housing, a transducer assembly, a sound-transmitting membrane, and a pressure-relief membrane; the housing forms a receiving cavity, and two ends of the housing are respectively provided with a treatment window and a pressure-relief window communicating with the receiving cavity; the transducer assembly is arranged in the receiving cavity and emits ultrasonic waves towards the treatment window; the sound-transmitting membrane covers the treatment window; the pressure-relief membrane covers the pressure-relief window, and the pressure-relief membrane protrudes towards the direction away from the receiving cavity to form an expansion part. The receiving cavity is filled with a sound-guiding medium, and the sound-guiding medium expands when heated and presses the pressure-relief membrane and the sound-transmitting membrane. Driven by the expansion part, the pressure-relief membrane expands towards the direction away from the receiving cavity prior to the sound-transmitting membrane.

[0006] In an embodiment of the utility model, the expansion part is annularly arranged above the pressure-relief window and is located at a position near the edge of the pressure-relief membrane;

[0007] And / or, the cross-sectional shape of the expansion part is an inverted V shape.

[0008] In an embodiment of the utility model, the included angle between the inclined plane formed after the expansion part protrudes and the vertical direction is greater than or equal to 35 degrees.

[0009] In an embodiment of the present utility model, the pressure relief film is made of silica gel, and the thickness of the pressure relief film is 0.2 mm - 0.4 mm.

[0010] In an embodiment of the present utility model, a recessed portion is formed in the middle of the pressure relief film by being recessed toward the direction close to the accommodation cavity. When the sound guiding medium expands due to heat, the recessed portion expands away from the accommodation cavity under the drive of the expansion portion.

[0011] In an embodiment of the present utility model, at least two recessed portions and at least two expansion portions are provided, and they are arranged adjacent to each other in sequence along the direction from the edge to the center of the pressure relief film. Each recessed portion is adjacent to one expansion portion.

[0012] In an embodiment of the present utility model, the housing is provided with at least two pressure relief windows, and at least two pressure relief films are provided. Each pressure relief film covers one pressure relief window.

[0013] In an embodiment of the present utility model, the pressure relief film includes at least two film sheets. The edges of at least two film sheets are hermetically connected to the pressure relief window of the housing, and the middle parts are stacked in an up-and-down spaced manner. Moreover, the thicknesses of at least two film sheets gradually decrease along the direction away from the accommodation cavity.

[0014] In an embodiment of the present utility model, the ultrasonic treatment head further includes a pressure sensor. The pressure sensor is arranged in the accommodation cavity and is used for monitoring the pressure in the accommodation cavity.

[0015] The present utility model also proposes an ultrasonic therapeutic apparatus, which includes a handle and the ultrasonic treatment head as described in any one of the above. The ultrasonic treatment head is connected to the [description is missing here].

[0016] The ultrasonic treatment head proposed by the present utility model includes a housing, a transducer assembly, an acoustic transmission membrane, and a pressure relief membrane. The housing forms a receiving cavity, and the two ends of the housing are respectively provided with a treatment window and a pressure relief window communicating with the receiving cavity. The acoustic transmission membrane is sealed at the treatment window, and the pressure relief membrane is sealed at the pressure relief window, so that the receiving cavity forms a closed cavity. The transducer assembly is used to generate ultrasonic waves for ultrasonic treatment. The transducer assembly is installed in the receiving cavity and emits ultrasonic waves towards the treatment window. The receiving cavity is filled with an acoustic guiding medium to improve the conduction quality of the ultrasonic waves. When the transducer assembly works for a long time, the generated heat is conducted into the acoustic guiding medium, and the acoustic guiding medium expands due to heat. At this time, the expanded acoustic guiding medium will simultaneously squeeze the pressure relief membrane and the acoustic transmission membrane. Since the expansion part protrudes from the surface of the pressure relief membrane towards the direction away from the receiving cavity, the expansion part can give the pressure relief membrane body a tendency to expand towards the direction away from the receiving cavity, thereby reducing the resistance when the pressure relief membrane expands outwards. Driven by the expansion part, the pressure relief membrane expands towards the direction away from the receiving cavity and expands earlier than the acoustic transmission membrane, thereby increasing the space of the receiving cavity and preventing the expanded acoustic guiding medium from squeezing the acoustic transmission membrane, thus improving the problem of the acoustic transmission membrane expanding outwards. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0018] Figure 1 Structural schematic diagram of the ultrasonic treatment head provided by the present utility model;

[0019] Figure 2 is Figure 1 Exploded view of the ultrasonic treatment head;

[0020] Figure 3 Top view of the ultrasonic treatment head provided by the present utility model;

[0021] Figure 4 is Figure 3 Cross-sectional view of the ultrasonic treatment head along A-A;

[0022] Figure 5 is Figure 4 Partial enlarged schematic diagram at B.

[0023] Explanation of the reference numerals in the drawings:

[0024] 1. Ultrasonic treatment head; 10. Housing; 11. Accommodation cavity; 12. Pressure relief window; 13. Treatment window; 20. Sound-transmitting membrane; 30. Pressure relief membrane; 31. Expansion part; 32. Concave part; 40. Transducer assembly; 50. Top cover.

[0025] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the accompanying drawings in conjunction with the embodiments. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0029] The present utility model provides an ultrasonic treatment head 1.

[0030] Combined with Figures 1 to 5As shown, in an embodiment of the present utility model, the ultrasonic treatment head 1 includes a housing 10, a transducer assembly 40, a sound-transmitting membrane 20, and a pressure-relief membrane 30; the housing 10 forms a receiving cavity 11, and both ends of the housing 10 are respectively provided with a treatment window 13 and a pressure-relief window 12 communicating with the receiving cavity 11; the sound-transmitting membrane 20 covers the treatment window 13; the transducer assembly 40 is disposed in the receiving cavity 11 and emits ultrasonic waves toward the treatment window 13; the pressure-relief membrane 30 covers the pressure-relief window 12, and the pressure-relief membrane 30 protrudes toward the direction away from the receiving cavity 11 to form an expansion portion 31; a sound guiding medium is filled in the receiving cavity 11, the sound guiding medium expands when heated, and presses the pressure-relief membrane 30, and the pressure-relief membrane 30 expands toward the direction away from the receiving cavity 11 prior to the sound-transmitting membrane 20 driven by the expansion portion 31.

[0031] In this embodiment, the cross-sectional shape of the housing 10 is circular. During ultrasonic treatment, the end with the treatment window 13 is used to abut against or approach the skin surface, and the end with the pressure-relief window 12 is used to connect to the treatment handle. The transducer assembly 40 includes components such as a transducer, a bracket, and a driving member. One end of the bracket is connected to the upper cover of the housing 10, and the other end is connected to the bracket to fix the transducer in the receiving cavity 11. It can be understood that in some scenarios, it is necessary to adjust the focusing position of the transducer to adapt to treatments at different depths or different positions. Therefore, the transducer is driven by the driving member to move up and down or horizontally to change the focusing position of the transducer. At the same time, the bracket and the transducer are arranged on the central axis of the housing 10, that is, the focusing point of the transducer is set on the central axis of the housing 10 and the treatment window 13. Therefore, the pressure-relief window 12 of the present application is opened at a position deviated from the center at the end of the housing 10 to avoid the installation position of the bracket. The ultrasonic treatment head 1 further includes a top cover 50, and the top cover 50 is detachably arranged on the end face of the housing 10 where the pressure-relief window 12 is opened to protect it, and the side of the top cover 50 facing away from the housing 10 is used to connect to the handle.

[0032] The sound-transmitting membrane 20 covers the treatment window 13. Here, the sound-transmitting membrane 20 has two effects: 1. Prevent the sound guiding medium in the receiving cavity 11 from flowing out through the treatment window 13; 2. Focus or shape the sound wave to ensure that the energy of the ultrasonic wave can be concentrated at a specific position, improving the treatment accuracy and effect. The material of the sound-transmitting membrane 20 includes acrylic resin, silicone rubber, polyurethane, and other synthetic materials with good acoustic properties.

[0033] During ultrasonic treatment, when the acoustic medium absorbs a large amount of heat generated by the transducer, it will expand. The heated and expanded acoustic medium will cause the sound transmission membrane 20 to bulge outward, thereby affecting the ultrasonic treatment effect. Therefore, in this application, a pressure relief window 12 is provided on the end face of the housing 10 facing away from the treatment window 13, and the pressure relief membrane 30 is sealed on the pressure relief window 12. Specifically, the pressure relief membrane 30 can be installed on the housing 10 by means of adhesives, press-fitting, etc. At the same time, the pressure relief membrane 30 is made of a material with greater flexibility than the sound transmission membrane 20 or the thickness of the pressure relief membrane 30 is controlled, so that the pressure relief membrane 30 is more likely to expand when being squeezed compared to the sound transmission membrane 20.

[0034] Therefore, when the acoustic medium expands due to heat, it will squeeze both the sound transmission membrane 20 and the pressure relief membrane 30 at the same time. At this time, the pressure relief membrane 30 expands before the sound transmission membrane 20, so as to increase the effective volume of the accommodation cavity 11, thereby reducing the pressure in the accommodation cavity 11, and thus avoiding the problem that the gradually expanding acoustic medium causes the sound transmission membrane 20 to bulge outward or even burst, improving the stability and safety of ultrasonic treatment.

[0035] Furthermore, a convex expansion part 31 is formed on the surface of the pressure relief membrane 30 facing away from the accommodation cavity 11. The raised expansion part 31 provides a guiding effect for the outward expansion of the pressure relief membrane 30, reducing the resistance when the pressure relief membrane 30 expands outward, so that the pressure relief membrane 30 is more likely to expand when being squeezed, and further improving the improvement effect on the problem of the outward expansion of the sound transmission membrane 20.

[0036] Combined Figure 4 and Figure 5 As shown, in an embodiment of the present utility model, the expansion part 31 is arranged in a ring above the pressure relief window 12 and is located at a position close to the edge of the pressure relief membrane 30. The cross-sectional shape of the expansion part 31 is an inverted V shape.

[0037] As can be seen from the above embodiments, in order to improve the sealing effect of the accommodation cavity 11, the four sides of the pressure relief membrane 30 need to be tightly press-fitted or bonded to the housing 10. Therefore, by providing the raised expansion part 31 on the pressure relief membrane 30, the resistance that needs to be overcome when the pressure relief membrane 30 expands outward can be reduced. In this embodiment, the expansion part 31 is further improved. The expansion part 31 is also designed to be annular and is arranged around the circumference of the pressure relief membrane 30 or the circumference of the pressure relief window 12 at a position close to the edge of the pressure relief membrane 30. At the same time, the expansion part 31 is arranged corresponding to the upper and lower edges of the window edge of the pressure relief window 12. Thus, when the pressure relief membrane 30 expands and relieves pressure, the resistance required for the pressure relief membrane 30 located above the pressure relief window 12 to expand at different positions is the same or similar, thereby further improving the convenience of the expansion of the pressure relief membrane 30 while ensuring the sealing effect of the pressure relief membrane 30 on the pressure relief window 12.

[0038] In addition, with or without limiting the shape and position of the pressure relief film 30, making the cross-sectional shape of the expansion part 31 an inverted V shape further improves the convenience of the outward expansion of the pressure relief film 30. In other embodiments, the cross-sectional shape of the expansion part 31 can also be an inverted U shape.

[0039] Combined with Figure 5 As shown, in an embodiment of the present utility model, the included angle between the inclined surface formed after the expansion part 31 bulges and the vertical direction is greater than or equal to 35 degrees.

[0040] It can be understood that since the expansion part 31 is formed by the bulge on the surface of the pressure relief film 30, the included angle between the inclined surface formed after the bulge and the vertical direction is less than 90 degrees. Combining the above embodiments to set the cross-sectional shape of the expansion part 31 as an inverted V shape, in this embodiment, the angles of the two inclined surfaces of the inverted V-shaped expansion part 31 are controlled between 35 - 90 degrees, which can give the middle part of the pressure relief film 30 an upward expansion trend. When the angle between the inclined surface and the vertical direction is less than 35 degrees, that is, the convex expansion part 31 is relatively sharp, at this time, the effect of causing the middle part of the pressure relief film 30 to expand upward is reduced, or the top of the sharp expansion part 31 will also hinder the outward expansion of the middle part of the pressure relief film 30.

[0041] In an embodiment of the present utility model, the material of the pressure relief film 30 is silica gel, and the thickness of the pressure relief film 30 is 0.2 mm - 0.4 mm.

[0042] Silica gel has relatively high flexibility compared to the sound transmission film 20, so that the pressure relief film 30 can expand prior to the sound transmission film 20. In addition, the thickness of the pressure relief film 30 is controlled within 0.2 - 0.4 mm, and within this range, the hardness of the silica gel is controlled at HA35 ± 5, so as to improve the convenience of forming the pressure relief film 30 with a relatively irregular shape while enabling the pressure relief film 30 to expand prior to the sound transmission film 20.

[0043] Combined with Figure 5 As shown, in an embodiment of the present utility model, a concave part 32 is formed by the middle part of the pressure relief film 30 being recessed toward the direction close to the accommodation cavity 11. When the sound guiding medium expands due to heat, the concave part 32 expands toward the direction away from the accommodation cavity 11 under the drive of the expansion part 31.

[0044] In this embodiment, a concave portion 32 is provided in the middle of the pressure relief film 30, thereby increasing the effective expansion area of the pressure relief film 30. The expansion of the pressure relief film 30 includes two processes. The first process: the pressure relief film 30 first undergoes inelastic expansion, that is, the concave portion 32 bulges toward the direction away from the accommodation cavity 11, and finally bulges to form a pressure relief film 30 with a dome shape; The second process: the sound guiding medium continues to absorb heat and expand. At this time, the pressure relief film 30 undergoes elastic expansion, the surface area of the pressure relief film 30 increases, and the entire pressure relief film 30 gradually bulges under the extrusion of the sound guiding medium. Since the resistance overcome by the inelastic expansion of the pressure relief film 30 in the first process is smaller than that of the elastic expansion in the second process, the present application improves the pressure relief effect of the pressure relief film 30 and the pressure relief sensitivity when dealing with the expansion of the sound guiding medium by setting the concave portion 32, and greatly improves the problem of the outward convexity of the sound transmission film 20.

[0045] In an embodiment of the present utility model, there are at least two concave portions 32 and at least two expansion portions 31, and they are arranged adjacent to each other in sequence along the direction from the edge to the center of the pressure relief film 30, and each concave portion 32 is adjacent to an expansion portion 31.

[0046] In this embodiment, at least two concave portions 32 and at least two expansion portions 31 are provided, and the concave portions 32 and the expansion portions 31 are arranged as described above, so that the overall shape of the pressure relief film 30 is wavy. Therefore, the convenience of the outward expansion of each concave portion 32 can be improved while keeping the surface area of the original pressure relief film 30 unchanged, and further, the convenience of the overall expansion of the pressure relief film 30 can be improved without changing the material and thickness of the pressure relief film 30.

[0047] In an embodiment of the present utility model, the housing 10 is provided with at least two pressure relief windows 12, and there are at least two pressure relief films 30, and each pressure relief film 30 covers a pressure relief window 12.

[0048] In this embodiment, increasing the number of the pressure relief windows 12 and the pressure relief films 30 can improve the upper limit of the pressure relief ability of the treatment head for the heat-expanded sound guiding medium, so that the treatment head can be applied for a longer time and at a higher power. At the same time, at least two pressure relief windows 12 are arranged at intervals in the circumferential direction of the housing 10, so as to ensure the overall pressure relief effect even when the temperatures at different positions of the sound guiding medium in the accommodation cavity 11 are uneven.

[0049] In an embodiment of the present utility model, the pressure relief film 30 includes at least two layers of film sheets. The edges of the at least two layers of film sheets are hermetically connected to the pressure relief windows 12 of the housing 10, and the middle parts are arranged in an upper and lower stacked manner at intervals, and the thicknesses of the at least two layers of film sheets gradually decrease along the direction away from the accommodation cavity 11.

[0050] When the pressure relief film 30 is relatively thin, the sound guiding medium easily seeps out from the pressure relief film 30. When the thickness of the pressure relief film 30 is relatively thick, the pressure relief film 30 cannot deform prior to the sound transmission film 20 and is not easily processed and formed. Therefore, in this embodiment, the pressure relief film 30 is designed as a multi-layer structure. The pressure relief film 30 includes at least two film sheets, which are stacked one above the other in sequence. At the same time, the edges of at least two film sheets are all sealed on the pressure relief window 12. For example, the edges of at least two film sheets can be crimped to the position of the housing 10 where the pressure relief window 12 is provided. In addition, the film sheet closest to the accommodation cavity 11 has the largest thickness, and the thickness of the film sheets decreases sequentially along the direction away from the accommodation cavity 11. Therefore, when the pressure relief film 30 expands, the multi-layer film sheet structure can reduce the minimum expansion threshold of the sound guiding medium during expansion, that is, improve the sensitivity of the pressure relief film 30 to sense the expansion of the sound guiding medium, and at the same time can also meet the sealing effect of the pressure relief film 30 on the pressure relief window 12.

[0051] In an embodiment of the present invention, the ultrasonic treatment head 1 further includes a pressure sensor, and the pressure sensor is disposed in the accommodation cavity 11 and is used to monitor the pressure in the accommodation cavity 11.

[0052] In this embodiment, a digital display device communicatively connected to the pressure sensor is provided on the outer side of the ultrasonic treatment head 1 or on the handle. The digital display device is used to display the pressure in the accommodation cavity 11 monitored by the pressure sensor, so that the operator can judge the pressure relief effect of the pressure relief film 30 based on the pressure in the accommodation cavity 11, and thus timely change the power or treatment time of the ultrasonic treatment head 1.

[0053] The present invention also proposes an ultrasonic therapeutic apparatus, which includes a handle and an ultrasonic treatment head 1. The specific structure of the ultrasonic treatment head 1 refers to the above embodiment. Since the ultrasonic therapeutic apparatus adopts all the technical solutions of all the above embodiments of the ultrasonic treatment head 1, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.

[0054] Among them, the ultrasonic treatment head 1 is connected to the handle. In some application scenarios, a control unit is provided inside the handle, and the ultrasonic treatment head is communicatively connected to the control unit, so that the operator can control the operation of the ultrasonic treatment head through the handle. In some other application scenarios, the ultrasonic therapeutic apparatus further includes a host, and the host is communicatively connected to the ultrasonic treatment head through a cable. After connecting the top cover 50 of the ultrasonic treatment head 1 to the handle, the operator can perform ultrasonic treatment on the skin by holding the handle, which improves the convenience of the treatment operation.

[0055] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An ultrasonic treatment head, characterized in that: The ultrasonic treatment head comprises: A shell, wherein the shell is formed with a receiving cavity, and two ends of the shell are respectively provided with a treatment window and a pressure relief window connected with the receiving cavity; a transducer assembly, the transducer assembly being disposed in the accommodating cavity and emitting ultrasonic waves toward the treatment window; a sound-transmitting membrane, the sound-transmitting membrane covering the treatment window; and A pressure relief membrane, the pressure relief membrane is sealed on the pressure relief window, the pressure relief membrane protrudes in a direction away from the accommodating cavity to form an expansion portion, The accommodating cavity is filled with a sound-conducting medium, which expands when heated and squeezes the pressure relief membrane. Driven by the expansion portion, the pressure relief membrane expands in a direction away from the accommodating cavity before the sound-transmitting membrane.

2. The ultrasonic treatment head according to claim 1, characterized in that: The expansion portion is disposed above the pressure relief window and is located near the edge of the pressure relief membrane; And / or, the cross-section of the expansion portion is an inverted V shape.

3. The ultrasonic treatment head according to claim 2, characterized in that: The angle between the inclined surface formed by the protrusion of the expansion portion and the vertical direction is greater than or equal to 35 degrees.

4. The ultrasonic treatment head according to claim 1, characterized in that: The material of the pressure relief membrane is silica gel, and the thickness of the pressure relief membrane is 0.2mm-0.4mm.

5. The ultrasonic treatment head according to any one of claims 1 to 4, characterized in that: The middle part of the pressure relief membrane is recessed toward the direction close to the accommodation cavity to form a recessed portion. The sound-conducting medium expands due to heat, and the recessed portion expands toward a direction away from the accommodation cavity driven by the expansion portion.

6. The ultrasonic treatment head according to claim 5, characterized in that: There are at least two of the recessed portions and the expansion portions, and they are arranged adjacent to each other in sequence from the edge to the center of the pressure relief membrane, and each of the recessed portions is arranged adjacent to one of the expansion portions.

7. The ultrasonic treatment head according to any one of claims 1 to 4, characterized in that: The shell is provided with at least two pressure relief windows, and at least two pressure relief membranes are provided, and each of the pressure relief membranes is sealed on one of the pressure relief windows.

8. The ultrasonic therapy head according to any one of claims 1 to 4, characterized in that: The pressure relief membrane includes at least two layers of membranes, the edges of at least two layers of the membranes are sealed and connected to the pressure relief windows of the shell, the middle parts are overlapped with each other in an upper and lower interval, and the thickness of at least two layers of the membranes gradually decreases in the direction away from the accommodating cavity.

9. The ultrasonic treatment head according to any one of claims 1 to 4, characterized in that: The ultrasonic therapy head further comprises a pressure sensor, which is arranged in the accommodating cavity and is used to monitor the pressure in the accommodating cavity.

10. An ultrasonic therapeutic apparatus, characterized in that: The ultrasonic therapeutic apparatus comprises a handle and an ultrasonic therapeutic head according to any one of claims 1 to 9, wherein the ultrasonic therapeutic head is connected to the handle.

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