Sound transmission membrane structure and ultrasonic therapeutic apparatus
By integrating the first sensor and the second sensor in the transmissive membrane structure of the ultrasound therapy instrument, the contact and fit between the transmissive membrane body and the skin is detected, and the problem of ineffective treatment and medical risks when the treatment head slides in edges or concave areas is solved, and the effective triggering and use of ultrasound energy is achieved.
Patent Information
- Application Number
- CN202421231950.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-05-30
AI Technical Summary
During the treatment of ultrasound therapy device, when the treatment head slides along the skin to the edges or angular areas or depressions, part of the treatment surface is closely connected to the skin, while the other part of the treatment surface is separated from the skin, resulting in the inability to effectively act on the deep areas of the skin, forming ineffective treatment and posing a medical risk.
A sound-permeable membrane structure is designed, including a sound-permeable membrane body, a first sensor and a second sensor. The first surface of the sound-permeable membrane body is fitted with the skin to be treated. The first sensor and the second sensor are respectively used to detect whether the sound-permeable membrane body is pressed in contact with the skin and the whole surface is fitted. Only when it is confirmed that the sound-permeable membrane body is pressed effectively with the skin and the whole surface is fitted, ultrasonic energy will be triggered.
By integrating the first sensor and the second sensor, it is ensured that ultrasonic energy is triggered only when the acoustic membrane body is effectively in contact with the skin and fits the entire surface, avoiding the problems of ineffective treatment and ultrasonic energy deflection, reducing medical risks.
Smart Images
Figure CN222828963U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of beauty equipment, in particular to a sound-transmitting membrane structure and an ultrasonic therapeutic apparatus. Background Art
[0002] In recent years, non-invasive beauty technology using focused ultrasound has been widely used. The principle is that the transducer installed inside the treatment head emits focused ultrasound. After the focused ultrasound is transmitted through the liquid conductor, it is focused on the subcutaneous tissue or fat tissue and forms a "high temperature point" on the local subcutaneous tissue or fat tissue, so that the local subcutaneous tissue shrinks under the action of high temperature, thereby achieving the beauty effect of improving skin firmness and losing weight.
[0003] In order to prevent the treatment head from releasing energy before it touches the skin, a piezoresistive sensor is usually set on the treatment surface of the treatment head. The piezoresistive sensor is usually set in a ring shape. As long as any position is pressed, the impedance and pressure value will change, thereby triggering the release of ultrasonic energy. However, when the treatment head slides along the skin to the angular area or the concave area, there will be a phenomenon that part of the treatment surface is tightly attached to the skin, and the other part of the treatment surface is separated from the skin. At this time, the triggered ultrasonic energy cannot act on the deep area separated from the skin, resulting in ineffective treatment. At the same time, the triggered ultrasonic energy may be deflected to act on fragile parts such as the eyeball, posing a medical risk. Utility Model Content
[0004] The main purpose of the utility model is to provide a sound-permeable membrane structure, aiming to solve the problem that energy is also triggered when part of the treatment surface is separated from the skin.
[0005] To achieve the above-mentioned purpose, the sound-transmitting membrane structure proposed in the utility model is used to be attached to the treatment surface of an ultrasonic therapeutic device, and includes a sound-transmitting membrane body, a first sensor and a second sensor. The first surface of the sound-transmitting membrane body is used to fit the skin to be treated. The first sensor is installed on the side of the second surface of the sound-transmitting membrane body, and is used to detect whether the sound-transmitting membrane body is in contact with and pressed against the skin to be treated. The second sensor is installed on the side of the second surface of the sound-transmitting membrane body and is spaced apart from the first sensor. A plurality of sensing areas are provided on the surface of the second sensor, and the plurality of sensing areas are arranged circumferentially around the center of the sound-transmitting membrane body. Each of the sensing areas is used to detect whether the sound-transmitting membrane body in the corresponding area fits against the skin to be treated.
[0006] In one embodiment, the first sensor and the second sensor are both annular structures, the sound-transmitting membrane structure further includes a diaphragm, the first sensor and the second sensor are respectively attached to both sides of the diaphragm, and the first sensor is attached to the second surface of the sound-transmitting membrane body.
[0007] In one embodiment, the sound-transmitting membrane structure further includes a first sealing membrane and a second sealing membrane, wherein the first sealing membrane is attached to the second surface of the sound-transmitting membrane body, and the second sealing membrane is attached to the side of the diaphragm facing away from the first sealing membrane, the first sealing membrane is provided with a first mounting hole adapted to the first sensor, and the second sealing membrane is provided with a second mounting hole adapted to the second sensor, the first sensor is embedded in the first mounting hole, and the second sensor is embedded in the second mounting hole.
[0008] In one embodiment, the sound-permeable membrane structure also includes a sealing membrane, which is attached to the second surface of the sound-permeable membrane body, and an annular mounting hole is opened on the surface of the sealing membrane. The first sensor, the diaphragm and the second sensor are stacked in sequence from top to bottom in the mounting hole, and the top surface of the first sensor is flush with the top surface of the sealing membrane, and the bottom surface of the second sensor is flush with the bottom surface of the sealing membrane.
[0009] In one embodiment, the first sensor and the second sensor are arranged in concentric rings, the sound-permeable membrane structure further includes a sealing membrane, the sealing membrane is attached to the second surface of the sound-permeable membrane body, and the first sensor and the second sensor are both embedded in the sealing membrane.
[0010] In one embodiment, the thickness of the first sensor and the second sensor are consistent with the thickness of the sealing film, and the surface of the sealing film is provided with a first mounting hole and a second mounting hole arranged in an annular manner. The first mounting hole is arranged in the outer circle of the second mounting hole, the first sensor is embedded in the first mounting hole, and the second sensor is embedded in the second mounting hole.
[0011] In one embodiment, the distance between the second sensor and the sound-transmitting membrane body is greater than the distance between the first sensor and the sound-transmitting membrane body.
[0012] In one embodiment, the second sensor includes a plurality of second sub-sensors, and the plurality of second sub-sensors are arranged in an annular direction around the center of the sound-transmitting membrane body at intervals, and a sensing area is provided on the surface of each of the second sub-sensors.
[0013] In one embodiment, a plurality of protrusions are circumferentially spaced apart on the first surface of the sound-transmitting membrane body, and the protrusions cover the first sensor.
[0014] In one embodiment, the first sensor is a resistance sensor, and the second sensor is a capacitance sensor.
[0015] The utility model also provides an ultrasonic therapeutic device, which includes a therapeutic head, a transducer and the above-mentioned sound-transmitting membrane structure, wherein the transducer is arranged in a water storage tank of the therapeutic head, and the sound-transmitting membrane structure is attached to the therapeutic surface of the therapeutic head.
[0016] The present sound-transmitting membrane structure integrates a first sensor and a second sensor together, wherein the first sensor detects whether the sound-transmitting membrane body is in contact with and pressed against the skin to be treated, and the second sensor detects whether the sound-transmitting membrane body is in full contact with the skin to be treated. Ultrasonic energy can only be triggered when it is confirmed that the sound-transmitting membrane body is effectively pressed against the skin and the sound-transmitting membrane body is in full contact with the skin to be treated, thereby avoiding the phenomenon that energy is triggered when part of the treatment surface is separated from the skin. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0018] Figure 1 It is a cross-sectional schematic diagram of the first embodiment of the sound-transmitting membrane structure of the utility model;
[0019] Figure 2 It is a cross-sectional schematic diagram of a second embodiment of the sound-transmitting membrane structure of the utility model;
[0020] Figure 3 It is a cross-sectional schematic diagram of a third embodiment of the sound-transmitting membrane structure of the utility model;
[0021] Figure 4 It is a cross-sectional schematic diagram of the fourth embodiment of the sound-transmitting membrane structure of the utility model.
[0022] Description of Figure Numbers:
[0023] 100. Sound-transmitting membrane structure; 1. Sound-transmitting membrane body; 11. Bump; 2. First sensor; 3. Second sensor; 4. Diaphragm; 5. Sealing membrane; 6. First sealing membrane; 7. Second sealing membrane.
[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0027] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0028] In order to prevent the treatment head from releasing energy without contacting the skin, a piezoresistive sensor is usually set on the treatment surface of the treatment head. The piezoresistive sensor is usually set in a ring shape. As long as any position is pressed, the impedance and pressure value will change, thereby triggering the release of ultrasonic energy. However, when the treatment head slides along the skin to the angular area or the concave area, there will be a phenomenon that part of the treatment surface is closely attached to the skin, and the other part of the treatment surface is separated from the skin. At this time, the triggered ultrasonic energy cannot act on the detached skin, resulting in ineffective treatment.
[0029] To this end, the utility model proposes a sound-transmitting membrane structure 100 for being attached to the treatment surface of an ultrasonic therapeutic device.
[0030] Reference Figures 1 to 4The embodiment of the sound-transmitting membrane structure 100 includes a sound-transmitting membrane body 1, a first sensor 2 and a second sensor 3. The first surface of the sound-transmitting membrane body 1 is used to fit the skin to be treated. The first sensor 2 is installed on the side of the second surface of the sound-transmitting membrane body 1 to detect whether the sound-transmitting membrane body 1 is in contact with and pressed on the skin to be treated. The second sensor 3 is installed on the side of the second surface of the sound-transmitting membrane body 1 and is spaced apart from the first sensor 2. A plurality of sensing areas are arranged on the surface of the second sensor 3. The plurality of sensing areas are arranged in a ring shape around the center of the sound-transmitting membrane body 1. Each sensing area is used to detect whether the sound-transmitting membrane body 1 in the corresponding area fits the skin to be treated.
[0031] Different from the sound-transmitting membrane structure used in the traditional ultrasonic therapeutic device, the technical solution of the utility model integrates the first sensor 2 and the second sensor 3 on the second surface of the sound-transmitting membrane structure 100. When in use, the entire sound-transmitting membrane structure 100 is attached to the sound-transmitting port of the treatment head, and the second surface of the sound-transmitting membrane body 1 is attached to the treatment surface of the treatment head. Then the first sensor 2 and the second sensor 3 are located between the treatment head and the sound-transmitting membrane body 1, and the first surface of the sound-transmitting membrane body 1 is used to attach to the skin to be treated. Among them, the first sensor 2 is a resistance sensor, and is arranged in an annular shape, so that any area thereof in contact with the skin can cause the impedance and pressure value to change, thereby detecting whether the sound-transmitting membrane body 1 is in contact with the skin to be treated. Among them, the second sensor 3 is a capacitive sensor, and the surface of the second sensor 3 is provided with a plurality of sensing areas, and the plurality of sensing areas are arranged circumferentially continuously or circumferentially at intervals around the center of the sound-transmitting membrane body 1. Each sensing area is used to detect whether the sound-transmitting membrane body 1 in the corresponding area is attached to the skin to be treated, thereby detecting whether the sound-transmitting membrane body 1 is attached to the entire surface of the skin to be treated.
[0032] For example, in one embodiment, the second sensor 3 includes a plurality of second sub-sensors, which are arranged circumferentially around the center of the sound-transmitting membrane body 1, and a sensing area is provided on the surface of each second sub-sensor, thereby realizing the circumferential arrangement of the sensing area.
[0033] In addition, a controller is provided in the treatment head of the ultrasonic therapeutic apparatus, and the controller is electrically connected to the first sensor 2 and the second sensor 3, and is used to receive the electrical signals emitted by the first sensor 2 and the second sensor 3. When the first surface of the sound-transmitting membrane body 1 is in contact with the skin to be treated, the controller first determines whether the first sensor emits a first electrical signal. If so, it means that the sound-transmitting membrane body 1 is at least partially pressed against the skin. Subsequently, the controller determines whether each sensing area in the second sensor emits a second electrical signal. If so, it means that each sensing area in the second sensor 3 is in contact with the skin to be treated, and it is confirmed that the sound-transmitting membrane body 1 is in contact with the entire surface of the skin to be treated, and the ultrasonic energy is triggered. If any sensing area in the second sensor 3 does not feedback the second electrical signal, it means that there is a sensing area in the second sensor 3 that is not in contact with the skin to be treated, and it is confirmed that some areas of the sound-transmitting membrane body 1 are detached from the skin, and the ultrasonic energy cannot be triggered at this time. At this time, the therapist needs to manually slide the treatment head to a suitable position and state so that the sound-transmitting membrane body 1 is in contact with the entire surface of the skin.
[0034] In summary, the present sound-transmitting membrane structure 100 integrates the first sensor 2 and the second sensor 3 together, and detects by the first sensor 2 whether the sound-transmitting membrane body 1 is in contact with and pressed on the skin to be treated, and by the second sensor 3 whether the sound-transmitting membrane body 1 is in full contact with the skin to be treated. Ultrasonic energy will only be triggered when it is confirmed that the sound-transmitting membrane body 1 is effectively pressed against the skin and the sound-transmitting membrane body 1 is in full contact with the skin to be treated, thereby avoiding the phenomenon that energy is triggered when part of the treatment surface is separated from the skin, which not only avoids the problem of ineffective treatment, but also avoids the problem of ultrasonic energy deflection and hitting non-treatment parts during emission.
[0035] It is worth mentioning that in the present sound-transmitting membrane structure 100, the second sensor 3 is a capacitive sensor, which will cause a change in capacitance only when it is close to or in contact with the skin, and will not cause a change in capacitance when it is close to or in contact with a substance other than the skin. When the first sensor 2 responds but the second sensor 3 does not respond, it means that the contacted substance is not skin tissue and cannot trigger the release of ultrasonic energy, thereby avoiding the problem of false triggering of the ultrasonic treatment head.
[0036] In some embodiments of the present invention, the first sensor 2 and the second sensor 3 are both annular structures, the sound-transmitting membrane structure 100 also includes a diaphragm 4, the first sensor 2 and the second sensor 3 are respectively attached to the two sides of the diaphragm 4, and the first sensor 2 is attached to the second surface of the sound-transmitting membrane body 1.
[0037] In this embodiment, the first sensor 2 and the second sensor 3 are respectively attached to the two sides of the diaphragm 4, which facilitates the modular assembly of the sound-transmitting membrane structure 100 on the one hand, and maximizes the coverage area of the first sensor 2 and the second sensor 3 on the other hand. The first sensor 2 and the second sensor 3 are isolated by the diaphragm 4 to avoid short circuit between the two sensors. The diaphragm 3 can be a PI film, which has insulation and heat resistance effects. Specifically, the diaphragm 3 can also be made of other materials with insulation properties, which is not specifically limited here.
[0038] For example, in Figure 1 In the illustrated embodiment, the sound-permeable membrane structure 100 further includes a first sealing membrane 6 and a second sealing membrane 7. The first sealing membrane 6 is attached to the second surface of the sound-permeable membrane body 1, and the second sealing membrane 7 is attached to the side of the diaphragm 4 that is away from the first sealing membrane 6. The coverage area of the first sealing membrane 6 and the second sealing membrane 7 is consistent with the coverage area of the diaphragm 4. The first sealing membrane 6 is provided with a first mounting hole adapted to the first sensor 2, and the second sealing membrane 7 is provided with a second mounting hole adapted to the second sensor 3. The first sensor 2 is embedded in the first mounting hole, and the second sensor 3 is embedded in the second mounting hole. In actual application, the first sealing membrane 6 is two annular concentric membranes, and the first mounting hole is the gap between the inner ring membrane and the outer ring membrane. The second sealing membrane 7 is provided in the same manner.
[0039] exist Figure 2 In the illustrated embodiment, the sound-transmitting membrane structure 100 further includes a sealing membrane 5, which is attached to the second surface of the sound-transmitting membrane body 1. An annular mounting hole is provided on the surface of the sealing membrane 5, and the mounting hole is the gap between the inner ring diaphragm and the outer ring diaphragm. The first sensor 2, the diaphragm 4 and the second sensor 3 are stacked in sequence from top to bottom in the mounting hole, and the top surface of the first sensor 2 is flush with the top surface of the sealing membrane 5, and the bottom surface of the second sensor 3 is flush with the bottom surface of the sealing membrane 5.
[0040] In some embodiments of the present invention, the first sensor 2 and the second sensor 3 are arranged in concentric circles, and the sound-transmitting membrane structure 100 also includes a sealing membrane 5, which is attached to the second surface of the sound-transmitting membrane body 1, and the first sensor 2 and the second sensor 3 are both embedded in the sealing membrane 5.
[0041] As in Figure 3 In the illustrated embodiment, the thickness of the first sensor 2 and the second sensor 3 are consistent with the thickness of the sealing film 5. The surface of the sealing film 5 is provided with a first mounting hole and a second mounting hole arranged in an annular manner. The first mounting hole is arranged in the outer circle of the second mounting hole. The first sensor 2 is embedded in the first mounting hole, and the second sensor 3 is embedded in the second mounting hole.
[0042] exist Figure 4In the embodiment shown, the distance between the second sensor 3 and the sound-transmitting membrane body 1 is greater than the distance between the first sensor 2 and the sound-transmitting membrane body 1. In this embodiment, the second sensor 3 is set to be thinner and farther away from the sound-transmitting membrane body 1, in order to avoid the second sensor 3 being too sensitive and causing false touch when the sound-transmitting membrane body 1 has not yet been attached to the skin.
[0043] It is not difficult to understand that the skin tissue is thick or thin. In the thinner skin tissue area and the concave area, the first sensor 2 is difficult to bear force and cannot meet the triggering requirements of the specific area. To this end, the present sound-transmitting membrane structure 100 is provided with a plurality of convex points 11 circumferentially spaced on the first surface of the sound-transmitting membrane body 1, and the convex points 11 cover the first sensor 2. The convex points 11 can be provided on the first surface of the sound-transmitting membrane body 1 by dispensing glue, which is not only simple in process, but also can make the convex points 11 hemispherical, and there is no scratching feeling when contacting the skin and sliding.
[0044] When the first sensor 2 is attached to the skin, the convex point 11 is squeezed against the sound-transmitting membrane body 1 under the action of the pressing force. Since the contact area between the convex point 11 and the sound-transmitting membrane body 1 is small, the pressure on the sound-transmitting membrane body 1 at the position where the convex point 11 is provided is large, and the pressing force is more easily recognized by the first sensor 2. It can be seen that the provision of the convex point 11 increases the sensitivity of the force on the first sensor 2, thereby ensuring that the triggering requirements can be met in areas with thinner skin tissue and concave areas. In addition, the convex point 11 also has a local massage effect on the skin, which can improve the treatment experience of the therapist.
[0045] The utility model also provides an ultrasonic therapeutic device, which includes a treatment head, a transducer and a sound-transmitting membrane structure 100. The specific structure of the sound-transmitting membrane structure 100 refers to the above embodiment. Since the ultrasonic therapeutic device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the transducer is arranged in the water storage tank of the treatment head, and the sound-transmitting membrane structure 100 is attached to the treatment surface of the treatment head.
[0046] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.
Claims
1. A sound-transmitting membrane structure, characterized in that: Used to be attached to the treatment surface of an ultrasonic therapeutic apparatus, the sound-transmitting membrane structure comprises: A sound-transmitting membrane body, wherein the first surface of the sound-transmitting membrane body is used to fit the skin to be treated; A first sensor, which is mounted on one side of the second surface of the sound-transmitting membrane body and is used to detect whether the sound-transmitting membrane body is in contact with and pressed against the skin to be treated; The second sensor is mounted on one side of the second surface of the sound-transmitting membrane body and is spaced apart from the first sensor. A plurality of sensing areas are arranged on the surface of the second sensor. The sensing areas are arranged in a ring shape around the center of the sound-transmitting membrane body. Each sensing area is used to detect whether the sound-transmitting membrane body in the corresponding area is in contact with the skin to be treated.
2. The sound-transmitting membrane structure according to claim 1, characterized in that: The first sensor and the second sensor are both annular structures, the sound-transmitting membrane structure further includes a diaphragm, the first sensor and the second sensor are respectively attached to both sides of the diaphragm, and the first sensor is attached to the second surface of the sound-transmitting membrane body.
3. The sound-transmitting membrane structure according to claim 2, characterized in that: The sound-transmitting membrane structure also includes a first sealing membrane and a second sealing membrane. The first sealing membrane is attached to the second surface of the sound-transmitting membrane body, and the second sealing membrane is attached to the side of the diaphragm facing away from the first sealing membrane. The first sealing membrane is provided with a first mounting hole adapted to the first sensor, and the second sealing membrane is provided with a second mounting hole adapted to the second sensor. The first sensor is embedded in the first mounting hole, and the second sensor is embedded in the second mounting hole.
4. The sound-transmitting membrane structure according to claim 2, characterized in that: The sound-permeable membrane structure also includes a sealing membrane, which is attached to the second surface of the sound-permeable membrane body. An annular mounting hole is opened on the surface of the sealing membrane. The first sensor, the diaphragm and the second sensor are stacked in sequence from top to bottom in the mounting hole, and the top surface of the first sensor is flush with the top surface of the sealing membrane, and the bottom surface of the second sensor is flush with the bottom surface of the sealing membrane.
5. The sound-transmitting membrane structure according to claim 1, characterized in that: The first sensor and the second sensor are arranged in concentric circles. The sound-permeable membrane structure also includes a sealing membrane. The sealing membrane is attached to the second surface of the sound-permeable membrane body. The first sensor and the second sensor are both embedded in the sealing membrane.
6. The sound-transmitting membrane structure according to claim 5, characterized in that: The thickness of the first sensor and the second sensor are consistent with the thickness of the sealing film. The surface of the sealing film is provided with a first mounting hole and a second mounting hole arranged in an annular manner. The first mounting hole is arranged in the outer circle of the second mounting hole. The first sensor is embedded in the first mounting hole, and the second sensor is embedded in the second mounting hole.
7. The sound-transmitting membrane structure according to claim 5, characterized in that: The distance between the second sensor and the sound-transmitting membrane body is greater than the distance between the first sensor and the sound-transmitting membrane body.
8. The sound-transmitting membrane structure according to claim 1, characterized in that: The second sensor includes a plurality of second sub-sensors, which are arranged in an annular direction around the center of the sound-transmitting membrane body at intervals, and a sensing area is provided on the surface of each of the second sub-sensors.
9. The sound-transmitting membrane structure according to any one of claims 1 to 8, characterized in that: A plurality of protrusions are arranged at intervals in an annular direction on the first surface of the sound-transmitting membrane body, and the protrusions cover the first sensor.
10. The sound-transmitting membrane structure according to any one of claims 1 to 8, characterized in that: The first sensor is a resistance sensor, and the second sensor is a capacitance sensor.
11. An ultrasonic therapeutic apparatus, characterized in that: It comprises a treatment head, a transducer and a sound-transmitting membrane structure as claimed in any one of claims 1 to 10, wherein the transducer is arranged in a water storage tank of the treatment head, and the sound-transmitting membrane structure is attached to the treatment surface of the treatment head.