High-intensity self-focusing ultrasonic transducer with variable path and focal nucleus

Abstract

The invention discloses a path and focal nucleus variable high-intensity self-focusing ultrasonic transducer, and relates to the technical field of ultrasonic treatment, the path and focal nucleus variable high-intensity self-focusing ultrasonic transducer comprises an upper seat device and a sliding device, the upper seat device comprises multiple sets of focusing units, and the multiple sets of focusing units define a paraboloid structure along the same axis; the sliding device is arranged along the central axis of the paraboloid structure and can reciprocate along the central axis, when the sliding device moves into the paraboloid structure, the focusing unit slides outwards along the paraboloid to be unfolded, and when the sliding device moves away from the paraboloid structure, the focusing unit slides inwards along the paraboloid to be folded; according to the invention, by adjusting the unfolding or folding of the focusing unit, the dynamic adjustment of the size and shape of the focal nucleus is realized to adapt to tumors with different sizes and shapes, and the problems that the focal nucleus of the traditional ultrasonic transducer cannot be adjusted and the treatment adaptability is poor are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic therapy, and particularly to a high-intensity self-focusing ultrasonic transducer with variable path and focal nucleus. Background Art

[0002] Due to the strong penetration ability of ultrasonic waves to tissues and the non-ionizing radiation to tissues, ultrasonic waves are increasingly commonly used in treatment and diagnosis. In ultrasonic therapy and ultrasonic diagnosis, the commonly used ultrasonic transducers are planar ultrasonic transducers and focused ultrasonic transducers.

[0003] For the existing focused ultrasonic transducers, the size and shape of the ultrasonic focused focal nucleus are fixed after assembly, lacking the ability of dynamic adjustment. This characteristic makes it difficult to achieve precise treatment when facing complex and diverse tumor conditions. For example, the sizes, shapes and positional relationships with surrounding tissues of tumors are different, and the fixed focal nucleus cannot be adapted to the specific characteristics of the tumor, resulting in a significant reduction in the treatment effect.

[0004] At the same time, the fan-shaped area of the ultrasonic sound field channel of the existing transducer presents a large-area high-energy distribution state. When treating shallow lesions under the ribs, this large-energy area will inevitably cover the normal tissues in the sound channel area, thereby causing thermal damage. This thermal damage will not only bring additional pain to the patient, but also may cause irreversible damage to the body function, seriously affecting the patient's recovery and quality of life.

[0005] In addition, the existing focused ultrasonic transducers have extremely strict requirements on the position of tumors. In some shallow areas under the ribs, since the lesions are blocked by human tissues such as ribs, it is difficult for ultrasonic waves to accurately focus on the lesion site. During the attempt to treat these blocked lesions, the ultrasonic energy will be abnormally distributed in the sound channel area, resulting in the generation of thermal damage, bringing serious postoperative harm to the patient. This limitation greatly restricts the application range of focused ultrasonic transducers in tumor treatment, making some patients unable to benefit from this advanced treatment technology.

[0006] In summary, the existing focused ultrasonic transducers have many problems to be solved urgently in tumor treatment, and there is an urgent need for a self-focusing transducer to flexibly adjust the size, shape and position of the focal nucleus of the transducer, so as to improve the accuracy and safety of treatment, avoid unnecessary harm to the patient, and meet the actual needs of clinical tumor treatment. Summary of the Invention

[0007] The object of the present invention is to provide a high-intensity self-focusing ultrasonic transducer with variable path and focal nucleus. By adjusting the expansion or closing of the focusing unit, the dynamic adjustment of the size and shape of the focal nucleus is realized to adapt to tumors of different sizes and shapes, solving the problems of non-adjustable focal nucleus and poor treatment adaptability of traditional ultrasonic transducers.

[0008] The present invention is realized through the following technical solutions:

[0009] A high-intensity self-focusing ultrasonic transducer with variable path and focal nucleus, comprising:

[0010] An upper seat device, the upper seat device includes multiple groups of focusing units, and the multiple groups of focusing units enclose a parabolic structure along the same axis;

[0011] A sliding device, the sliding device is arranged along the central axis of the parabolic structure and can reciprocate along the central axis. When the sliding device moves towards the inside of the parabolic structure, the focusing units slide outwards along the parabola and expand. When the sliding device moves away from the parabolic structure, the focusing units slide inwards along the parabola and close.

[0012] In this solution, the upper seat device adopts a parabolic structure formed by enclosing multiple groups of focusing units, providing a geometric basis for the directional focusing of ultrasonic energy. The sliding device reciprocates along the central axis of the parabola, and then controls the expansion or closing of the focusing units along the parabola through mechanical transmission, thereby changing the convergence path of ultrasonic energy and the morphology of the focal nucleus. When the sliding device moves towards the inside of the parabola, the focusing units expand outwards to form a larger energy coverage area, which is suitable for shallow treatment scenarios where energy needs to be dispersed to reduce thermal damage. When the sliding device moves away from the parabola, the focusing units close inwards to form a more concentrated high-energy sound field, meeting the treatment requirements for deep tumors. Therefore, the present invention breaks through the limitations of traditional fixed-focal-nucleus transducers, adjusts the ultrasonic energy distribution in real time through mechanical movement, and solves the core problems in the prior art such as inability to adapt to complex lesion morphologies, easy to cause thermal damage to normal tissues, and low treatment efficiency.

[0013] As a further solution of the self-focusing ultrasonic transducer, a slave sliding device is provided at the end of each focusing unit. The head of the slave sliding device close to the parabolic structure is a curved surface structure, and the slave sliding device is in sliding contact with the curved surface head.

[0014] In this solution, the secondary sliding device at the end of each focusing unit forms a curved surface contact with the curved surface head of the sliding device, and through the geometric constraint of the curved surface, the linear motion of the primary sliding device is converted into the radial expansion / retraction motion of the focusing unit along the paraboloid. When the primary sliding device moves along the central axis, the curved surface head drives the secondary sliding device through the curved surface contact, thereby driving the focusing unit to slide on the paraboloid, so as to change the convergence path of the ultrasonic energy and the shape of the focal core. At the same time, it allows the focusing unit to maintain a dynamic angle adjustment with the normal direction of the paraboloid during the movement, ensuring that the ultrasonic energy can be accurately focused on the target area according to clinical requirements.

[0015] As a further solution of the self-focusing ultrasonic transducer, a primary sliding device is connected to the head of the sliding device close to the paraboloid structure, and the primary sliding device reciprocates along the central axis to expand or retract the focusing unit.

[0016] In this solution, the primary sliding device serves as the power input end, and through the linear reciprocating motion along the central axis of the paraboloid, the external mechanical power is converted into the radial expansion / retraction motion of the focusing unit.

[0017] As a further solution of the self-focusing ultrasonic transducer, the primary sliding device is a spherical structure, and the secondary sliding device slides in point contact with the spherical surface of the primary sliding device.

[0018] In this solution, the primary sliding device with a spherical structure forms a single-point contact with the secondary sliding device. This geometric constraint not only ensures the accuracy of motion transmission but also reduces mechanical losses through the low-friction characteristics of the spherical pair. When the primary sliding device moves along the central axis, the spherical head drives the secondary sliding device through point contact, converting the linear motion into the radial expansion / retraction motion of the focusing unit along the paraboloid. At the same time, this spherical point contact structure enables the secondary sliding device to adapt to the angle change of the focusing unit during the movement, ensuring that all focusing units are synchronously and evenly expanded to the target position (such as an opening angle of 15 - 40°), thereby realizing continuous adjustment of the focal core size, enabling the transducer to quickly respond to clinical requirements during the treatment process, and adjusting the sound field distribution in real time. While ensuring the treatment energy density, it effectively reduces the thermal damage of the sidelobe energy to normal tissues.

[0019] As a further solution of the self-focusing ultrasonic transducer, the upper seat device further includes a slide rail base, the slide rail base is connected to the outer side wall of the sliding device, and the inner side wall of the slide rail base is a paraboloid, and the focusing unit rolls along the inner side wall of the slide rail base through a rolling component.

[0020] In this solution, the inner parabolic sidewall of the slide rail base forms a geometric conjugate with the parabolic structure of the focusing unit. When the sliding device moves along the central axis, the focusing unit realizes low-friction and high-precision radial sliding on the parabolic slide rail through the rolling components, and also ensures that the convergence path of ultrasonic energy always matches the clinical treatment requirements through the parabolic constraint.

[0021] As a further solution of the self-focusing ultrasonic transducer, a return fixing seat is also connected to the outer sidewall of the sliding device, and a return device is connected between the return fixing seat and the rolling components. The return device provides a restoring force for the focusing unit.

[0022] In this solution, one end of the return device is fixed to the return fixing seat, and the other end is connected to the rolling components of the focusing unit. Elastic deformation occurs and potential energy is stored during the unfolding process of the focusing unit. When the main sliding device retracts, the return device releases the stored elastic force, and drives the focusing unit to quickly reset to the closed state along the parabolic slide rail through the rolling components, ensuring that the focusing units are closely attached to form a concentrated sound field. In this way, not only the active reset of the focusing unit is realized, but also the driving force requirement of the main sliding device is reduced through elastic force compensation. At the same time, it is ensured that all focusing units are retracted synchronously and uniformly, and the restoring force of the return device and the driving force of the main sliding device form a two-way coordination, enabling the transducer to quickly switch between the two modes of unfolding treatment and closing treatment.

[0023] As a further solution of the self-focusing ultrasonic transducer, a plurality of the rolling components on each of the focusing units are arranged at intervals along the sliding direction, and the return device is connected to one of the rolling components.

[0024] In this solution, the plurality of rolling components are arranged at intervals along the sliding direction of the parabolic slide rail, which can not only disperse the load during the movement of the focusing unit, reduce the single-point contact stress, but also ensure that the focusing unit maintains a stable parabolic shape during the unfolding / folding process through multi-point support. And the return device is only connected to one of the rolling components, using the lever principle to convert the elastic restoring force into the overall folding movement of the focusing unit. When the main sliding device retracts, the return device applies a pulling force through the connection point, driving the rolling component to move along the slide rail base towards the center of the parabola, and at the same time transmitting the restoring force to other rolling components through the rigid structure of the focusing unit, ensuring that all focusing units are retracted synchronously and uniformly to the closed state, realizing precise control of the focal core shape. In addition, the rolling components arranged at intervals also allow the return device to adjust the connection position according to the treatment requirements, flexibly changing the action point of the restoring force, and further optimizing the sound field distribution.

[0025] As a further solution of the self-focusing ultrasonic transducer, a through sliding groove matching the rolling components is provided on the sidewall of the slide rail base;

[0026] Among them, the rolling component includes a piezoelectric moving shaft and a roller. One end of the piezoelectric moving shaft is connected to the focusing unit, and the other end of the piezoelectric moving shaft passes through the sliding groove and is connected to the roller. The roller drives the focusing unit to roll along the outer side wall of the slide rail base.

[0027] In this solution, the sliding groove provides a motion trajectory constraint for the piezoelectric moving shaft, so that when driving the focusing unit to unfold / fold along the paraboloid, it always maintains an accurate angle with the normal direction of the paraboloid of the slide rail base. The roller converts sliding friction into rolling friction through rolling contact with the outer side wall of the slide rail base, significantly reducing the motion resistance and improving the mechanical efficiency.

[0028] As a further solution of the self-focusing ultrasonic transducer, the focusing unit includes a piezoelectric device and an energy collection and reflection device. The inner side wall of the energy collection and reflection device is connected to the piezoelectric device and drives the piezoelectric device to unfold or fold.

[0029] In this solution, the inner side wall of the energy collection and reflection device is rigidly connected to the piezoelectric device. When the sliding device drives the energy collection and reflection device to unfold or fold along the parabolic slide rail, its inner side wall synchronously drives the piezoelectric device to adjust the angle through mechanical linkage. By changing the geometric shape of the ultrasonic emission array, the dynamic regulation of the main lobe width and sidelobe energy distribution of the sound field is realized.

[0030] As a further solution of the self-focusing ultrasonic transducer, when the piezoelectric device is in the unfolded state, there is no closure between adjacent piezoelectric devices, forming a gap.

[0031] In this solution, when the main sliding device drives the focusing unit to unfold along the paraboloid, the gap formed between adjacent piezoelectric devices breaks the structure of the continuous fan-shaped high-energy sound field of the traditional transducer. By changing the geometric shape of the ultrasonic emission array, the main lobe width of the sound beam is gradually shortened, and the proportion of sidelobe energy gradually increases. In this way, the formed gap forms a low-energy protection area directly below the focal nucleus, effectively reducing the thermal damage to the superficial normal tissues during the treatment process.

[0032] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0033] 1. The present invention drives the focusing unit to unfold / fold along the paraboloid through the main sliding device, realizing continuous adjustment of the size and shape of the focal nucleus, breaking through the limitation that the traditional fixed focal nucleus transducer cannot adapt to complex tumor shapes, and greatly shortening the treatment time in clinical treatment;

[0034] 2. In the deployed state, adjacent piezoelectric devices of the present invention form a gap, gradually shortening the width of the main lobe of the sound beam, gradually increasing the proportion of the energy of the side lobes, and forming an energy attenuation area directly below the focal nucleus, effectively reducing the thermal damage of the superficial normal tissues. At the same time, since the essence of the reduction in the size of the focal nucleus is that the energy is dispersed to the side lobes, and when the difference between the side lobes and the main lobe is not significant, the side lobes also have a significant effect on the treatment of tumors;

[0035] 3. The present invention can also change the sound path by adjusting the angle of the focusing unit, successfully avoiding rib occlusion to achieve the treatment of superficial lesions under the ribs, breaking through the strict requirements of traditional transducers for the location of lesions. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings:

[0037] Figure 1 is a schematic structural diagram of the present invention;

[0038] Figure 2 is a top view structural schematic diagram of the present invention in the closed state;

[0039] Figure 3 is a front view structural schematic diagram of the present invention in the closed state;

[0040] Figure 4 is a top view structural schematic diagram of the present invention in the open state;

[0041] Figure 5 is a front view structural schematic diagram of the present invention in the open and closed state;

[0042] Figure 6 is the projected area at the same depth of the present invention in the closed state;

[0043] Figure 7 is the linear sound field simulation calculation diagram of the present invention in the closed state;

[0044] Figure 8 is the expanded diagram of the sound path simulation calculation of the present invention in the closed state;

[0045] Figure 9 is the projected area at the same depth of the present invention in the open state;

[0046] Figure 10 is the linear sound field simulation calculation diagram of the present invention in the open state;

[0047] Figure 11 is the expanded diagram of the sound path simulation calculation of the present invention in the open state;

[0048] Figure 12The focal nucleus change curve in the direction of the wafer center of the present invention;

[0049] Figure 13 The focal nucleus change curve in the direction of the center of the wafer gap of the present invention;

[0050] Figures 14 to 17 The energy change diagram of the main lobe and side lobes with the increase of the opening angle of the piezoelectric device.

[0051] Reference numerals in the drawings and corresponding component names:

[0052] 1 - Piezoelectric device, 2 - Energy collection and reflection device, 3 - Slide rail base, 4 - Piezoelectric moving shaft, 5 - Roller seat, 6 - Roller, 7 - Fixing device, 8 - Slave sliding device, 9 - Return device, 10 - Return fixing seat, 11 - Main sliding device. Detailed implementation manners

[0053] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments and drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0054] Embodiment 1

[0055] Embodiment 1 of the present invention provides a high-intensity self-focusing ultrasonic transducer with variable path and focal nucleus, as Figure 1 shown, including an upper seat device and a sliding device;

[0056] Among them, as Figure 1 shown, the upper seat device includes multiple groups of focusing units and a slide rail base 3. The number of focusing units can be selected according to actual needs. In this embodiment, the upper seat device includes 6 groups of focusing units. These 6 groups of focusing units enclose a parabolic structure along the same axis. This parabolic design helps to more effectively converge ultrasonic energy and improve the focusing effect. The inner side wall of the slide rail base 3 is a parabolic surface that matches the parabolic structure.

[0057] Among them, as Figure 1As shown, each set of focusing units consists of a piezoelectric device 1 and an energy harvesting and reflecting device 2. The piezoelectric device 1 is the core component for generating ultrasonic waves. When an alternating voltage is applied, the piezoelectric device 1 generates mechanical vibrations and radiates ultrasonic waves outward. During operation, it can convert electrical energy into ultrasonic energy to provide the energy required for ultrasonic therapy. The inner wall of the energy harvesting and reflecting device 2 is tightly connected to the piezoelectric device 1. Its main function is to collect the ultrasonic energy generated by the piezoelectric device 1 and further converge and direct the energy through reflection, enhancing the focusing effect of the ultrasonic energy in the target area. Therefore, to achieve the purpose of adjusting the size and shape of the focal nucleus, the outer wall of the energy harvesting and reflecting device 2 is connected to the rolling component through a piezoelectric moving shaft 4, and each set of focusing units rolls along the side wall of the slide rail base 3 through the rolling component.

[0058] Meanwhile, a through-hole is also formed in the middle of the parabolic structure surrounded by 6 sets of focusing units. A sliding device is inserted through this through-hole. The sliding device is arranged along the central axis of the through-hole and can reciprocate along the axis of this through-hole under the drive of a driving mechanism.

[0059] As Figure 2 and Figure 3 shown, when the sliding device moves away from the parabolic structure to the lower limit, the energy harvesting and reflecting device 2 and the piezoelectric device 1 move along the slide rail base 3 to the closed state. There is no gap between the 6 piezoelectric devices 1. At this time, the projected area of the transducer at the same depth is shown in Appendix Figure 6 , the linear sound field simulation calculation is shown in Appendix Figure 7 , and the developed view of the sound path simulation calculation is shown in Appendix Figure 8 . At this time, the sound field channel between the piezoelectric device 1 and the focal region presents a fan-shaped structure, all of which are large energy regions, and it is more suitable for treating unobstructed lesions such as uterine fibroids.

[0060] As Figure 4 and Figure 5 shown, when the sliding device moves into the parabolic structure, the sliding device drives the energy harvesting and reflecting device 2 and the piezoelectric device 1 to move upward along the slide rail base 3, causing the piezoelectric device 1 to open like a petal, and there is no closure between the piezoelectric devices 1, forming a gap. At this time, see Appendix Figure 9 the projected area of the transducer at the same depth increases, the linear sound field simulation calculation is shown in Appendix Figure 10 , and the developed view of the sound path simulation calculation is shown in Appendix Figure 11 ; at this time, a large low-energy region is formed in the fan-shaped area directly below the focal nucleus of the piezoelectric device 1. By adjusting the moving angle of the piezoelectric device 1, the temperature rise problem during treatment can be reduced, avoiding thermal damage.

[0061] In this embodiment, it should also be noted that during the upward movement of the sliding device according to the treatment requirements, since the energy harvesting and reflecting device 2 and the piezoelectric device 1 move upward along the guide rail base 3, the angle of the piezoelectric device 1 in the guide rail base 3 is changed. The change in the angle can cause the focal nucleus to change. The focal nucleus change curve is shown in Figure 12 and Figure 13 , as the opening angle of the piezoelectric device 1 increases, the size of the focal nucleus significantly shrinks. And as the opening angle of the piezoelectric device 1 increases, the main lobe (the main lobe is the area with the highest ultrasonic energy density, corresponding to the position of the focal nucleus) gradually becomes narrower, and the side lobe (the side lobe is the secondary energy beam formed on both sides of the main lobe due to the interference effect when the ultrasonic transducer array emits sound waves) gradually becomes wider, as shown in Figures 14 - 17 . The energy of the main lobe significantly decreases, and the energy of the side lobe significantly increases. This indicates that the essence of the shrinkage of the focal nucleus size is that the energy is dispersed to the side lobe. When the difference between the side lobe and the main lobe is not large, the side lobe also has a significant effect on the treatment of tumors. Therefore, a gap is formed between adjacent piezoelectric devices 1, and the side lobe that is traditionally regarded as interference can be transformed into a treatment advantage. This dynamic side lobe regulation process breaks through the cognitive limitation of "the stronger the main lobe, the better" in traditional ultrasonic treatment, realizes the dynamic distribution of the sound field energy, and significantly improves the safety while ensuring the treatment effect.

[0062] Embodiment 2

[0063] Based on Embodiment 1, this Embodiment 2 further provides a high-intensity self-focusing ultrasonic transducer with variable path and focal nucleus, as shown in Figures 1 to 5 . At the end of each energy harvesting and reflecting device 2, a slave sliding device 8 is connected. The head of the sliding device close to the slave sliding device 8 has a curved surface structure, and the slave sliding device 8 is in sliding contact with the curved surface head.

[0064] Specifically, please refer to Figure 1 , Figure 2 and Figure 4 shown. The head of the sliding device close to the slave sliding device 8 is connected to the main sliding device 11. The main sliding device 11 serves as the power input end. Through the linear reciprocating motion along the axis of the through hole, the external mechanical power is converted into the radial expansion / closing motion of the focusing unit. And the main sliding device 11 has a spherical surface structure, and the head of the slave sliding device 8 also has a spherical surface structure. The head of the slave sliding device 8 and the spherical surface of the main sliding device 11 form a point contact sliding mechanism, enabling the slave sliding device 8 to adapt to the angle change of the focusing unit during the movement, ensuring that all focusing units are synchronously and evenly expanded to the target position, thereby realizing continuous adjustment of the focal nucleus size.

[0065] Meanwhile, a return fixing base 10 is also connected to the outer sidewall of the sliding device. The return fixing base 10 is located below the main sliding device 11. A return device 9 is connected between the return fixing base 10 and the rolling assembly. The return device 9 is usually an elastic element, such as a spring, etc. It is connected between the return fixing base 10 and the piezoelectric moving shaft 4 of the rolling assembly, stores elastic potential energy when the focusing unit unfolds, and provides power for the reset of the focusing unit. And to adjust the connection position according to the treatment requirements and further optimize the sound field distribution, a plurality of rolling assemblies on each focusing unit are arranged at intervals along the sliding direction, and the return device 9 can be connected to one of the rolling assemblies as needed, so as to flexibly change the acting point of the reset force.

[0066] In this embodiment, in order to ensure that the focusing unit always maintains an accurate angle with the parabolic normal direction of the slide rail base 3 when unfolding / folding along the paraboloid, a through sliding groove matching the rolling assembly is provided on the sidewall of the slide rail base 3. The sliding groove provides a motion trajectory constraint for the piezoelectric moving shaft 4. Specifically, the rolling assembly includes a roller seat 5 and a roller 6. One end of the piezoelectric moving shaft 4 is connected to the energy collection and reflection device 2, and the other end of the piezoelectric moving shaft 4 passes through the sliding groove and is connected to the roller 6 through the roller seat 5. The roller 6 drives the energy collection and reflection device 2 to roll along the outer sidewall of the slide rail base 3.

[0067] The working principle of this embodiment: When the main sliding device 11 moves forward along the through-hole central axis, it drives the slave sliding device 8 to move through spherical point contact. The slave sliding device 8 further drives the energy collection and reflection device 2 in the focusing unit. The energy collection and reflection device 2 drives the piezoelectric device 1 to unfold along the parabolic trajectory of the slide rail base 3 through the connection with the piezoelectric device 1. During the unfolding process, the rolling assembly rolls along the outer sidewall of the slide rail base 3 to ensure the smoothness of the movement. A gap will gradually form between adjacent piezoelectric devices 1. By adjusting the size of the gap and the unfolding angle of the focusing unit, the propagation path and focusing effect of ultrasonic waves can be changed, and the adjustment of the focal core size and position can be realized.

[0068] When the main sliding device 11 moves in the reverse direction, the return device 9 starts to play a role. The elastic potential energy stored in the return device 9 is gradually released, pulling the rolling assembly, and then driving the piezoelectric device 1 and the energy collection and reflection device 2 in the focusing unit to fold up, so that adjacent piezoelectric devices 1 are reattached and restored to the initial focusing state.

[0069] In this way, the high-intensity self-focusing ultrasonic transducer can flexibly adjust the path of ultrasonic energy and the size and position of the focal core according to different treatment requirements, improving the effect and adaptability of ultrasonic treatment.

[0070] The specific embodiments described above further elaborate on the object, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-intensity self-focusing ultrasonic transducer with variable path and focal nucleus, characterized in that Comprising: An upper seat device, the upper seat device includes multiple groups of focusing units, and the multiple groups of focusing units enclose to form a parabolic structure along the same axis; A sliding device, the sliding device is arranged along the central axis of the parabolic structure and can reciprocate along the central axis. When the sliding device moves towards the inside of the parabolic structure, the focusing units slide outwards along the parabola. When the sliding device moves away from the parabolic structure, the focusing units slide inwards along the parabola and close up.

2. The high-intensity self-focusing ultrasonic transducer with variable path and focal nucleus according to claim 1, characterized in that, A slave sliding device is provided at the end of each of the focusing units. The head of the sliding device close to the parabolic structure is a curved surface structure, and the slave sliding device (8) is in sliding contact with the curved surface head.

3. A high-intensity self-focusing ultrasonic transducer with variable path and focal core according to claim 2, characterized in that A main sliding device (11) is connected to the head of the sliding device close to the parabolic structure. The main sliding device (11) reciprocates along the central axis to expand or close up the focusing units.

4. The high-intensity self-focusing ultrasonic transducer with variable path and focal nucleus according to claim 3, characterized in that The main sliding device (11) is a spherical structure, and the slave sliding device (8) is in point contact sliding with the spherical surface of the main sliding device (11).

5. A high-intensity self-focusing ultrasonic transducer with variable path and focal nucleus according to any one of claims 1-4, characterized in that, The upper seat device further includes a slide rail base (3). The slide rail base (3) is connected to the outer side wall of the sliding device, and the inner side wall of the slide rail base (3) is a parabola. The focusing units roll along the inner side wall of the slide rail base (3) through rolling components.

6. The high-intensity self-focusing ultrasonic transducer with variable path and focal nucleus according to claim 5, characterized in that, A return fixing seat (10) is further connected to the outer side wall of the sliding device. A return device (9) is connected between the return fixing seat (10) and the rolling components. The return device (9) provides a restoring force for the focusing units.

7. The high-intensity self-focusing ultrasonic transducer with variable path and focal nucleus according to claim 6, characterized in that, Multiple rolling components on each of the focusing units are arranged at intervals in the sliding direction in an array, and the return device (9) is connected to one of the rolling components.

8. The high-intensity self-focusing ultrasonic transducer with variable path and focal nucleus according to claim 6, characterized in that, A through sliding groove matching the rolling components is provided on the side wall of the slide rail base (3); Wherein, the rolling component includes a piezoelectric moving shaft (4) and a roller (6). One end of the piezoelectric moving shaft (4) is connected to the focusing unit, and the other end of the piezoelectric moving shaft (4) passes through the sliding groove and is connected to the roller (6). The roller (6) drives the focusing unit to roll along the outer side wall of the slide rail base (3).

9. The high-intensity self-focusing ultrasonic transducer with variable path and focal core according to claim 5, wherein The focusing unit includes a piezoelectric device (1) and an energy harvesting and reflecting device (2). The inner side wall of the energy harvesting and reflecting device (2) is connected to the piezoelectric device (1) and drives the piezoelectric device (1) to expand or contract.

10. A high-intensity self-focusing ultrasonic transducer with variable path and focal nucleus according to claim 9, characterized in that, When the piezoelectric device (1) is in the expanded state, there is no closure between adjacent piezoelectric devices (1), forming a gap.

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