Transducer assembly for soft and hard tissue and ultrasonic scalpel

Abstract

The utility model relates to the technical field of medical apparatus and instruments, especially to a kind of energy conversion device and ultrasonic scalpel for soft tissue and hard tissue, including amplitude bar and piezoelectric ceramic assembly of sleeve setting on amplitude bar, piezoelectric ceramic assembly includes the N piezoelectric ceramics distributed along amplitude bar axis direction, wherein N is natural number;It also includes conducting ring and first conducting tab, and first conducting tab is electrically connected with adjacent first odd number conducting ring;Second conducting tab is electrically connected with adjacent second even number conducting ring, its beneficial effect is that all odd number and even number conducting ring form a whole in electrical connection relationship, and then the stability and energy conversion efficiency of energy conversion device for soft tissue and hard tissue are improved.This connection mode also forms an alternating polarization direction between piezoelectric ceramics, and then the use effect of energy conversion device for soft tissue and hard tissue is guaranteed, and the energy conversion efficiency of energy conversion device for soft tissue and hard tissue is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, and in particular to a transducer and an ultrasonic scalpel for soft and hard tissues. Background Technology

[0002] Ultrasonic scalpels have been widely used for over 20 years. They utilize transducers to convert electrical energy into acoustic energy. Through the high-frequency vibration of the transducer and the amplification by the amplitude transformer, the ultrasonic scalpel tip exhibits cavitation, thermal, and mechanical effects.

[0003] Ultrasonic scalpels have wide applications in various surgical fields, such as laparoscopic surgery, thoracic surgery, and neurosurgery. Their high precision, low invasiveness, and rapid recovery make them an essential tool in modern surgery. With the continuous development of medical technology, ultrasonic scalpels will continue to play a vital role in the field of surgery, safeguarding patients' health.

[0004] The efficiency of transducers used in soft and hard tissues directly affects the effectiveness of ultrasonic scalpels. Therefore, improving the efficiency and safety stability of transducers used in soft and hard tissues is of paramount importance. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a transducer and an ultrasonic scalpel for soft and hard tissues to improve the safety, stability and working efficiency of the transducer for soft and hard tissues.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] In a first aspect, this utility model provides a transducer for soft and hard tissues, comprising an amplitude transformer and a piezoelectric ceramic assembly sleeved on the amplitude transformer. The piezoelectric ceramic assembly includes N piezoelectric ceramics distributed along the axis of the amplitude transformer, where N is a natural number. It also includes conductive rings and a first conductive electrode plate. When N≥2, conductive rings are provided between every two adjacent piezoelectric ceramics and on both sides of the piezoelectric ceramic assembly. The conductive rings are arranged perpendicular to the axis of the amplitude transformer and electrically connected to the circular end face of the corresponding piezoelectric ceramic. The first conductive electrode plate is electrically connected to the adjacent odd-numbered conductive ring. When N≥3, it also includes a second conductive electrode plate, which is electrically connected to the adjacent even-numbered conductive ring. The first and second conductive electrode plates are located outside the piezoelectric ceramics.

[0010] Secondly, this utility model provides an ultrasonic surgical scalpel, including the transducer for soft and hard tissues as described in the above-mentioned technical solution.

[0011] (III) Beneficial Effects

[0012] The beneficial effects of this invention are as follows: In the transducer and ultrasonic scalpel for soft and hard tissues, the conductive rings are located not only between adjacent piezoelectric ceramics but also on both axial sides of the outermost piezoelectric ceramic in the piezoelectric ceramic assembly. The conductive rings are electrically connected to the circular end faces of the corresponding piezoelectric ceramics. This connection method ensures that each piezoelectric ceramic can receive electrical energy through the conductive rings and generate vibration.

[0013] The first conductive electrode is electrically connected to the adjacent odd-numbered conductive ring, and the second conductive electrode is electrically connected to the even-numbered conductive ring. This connection method forms a special circuit path in the piezoelectric ceramic assembly. Specifically, all odd-numbered and even-numbered conductive rings are electrically connected through their corresponding first conductive electrodes, forming a unified electrical connection. This improves the stability and energy conversion efficiency of the transducer for both soft and hard tissues. This connection method also creates an alternating polarization direction between the piezoelectric ceramics, ensuring the effectiveness of the transducer for both soft and hard tissues and improving its energy conversion efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the amplitude transformer and various conductive electrode plates in this utility model.

[0015] Figure 2 This is a schematic diagram of the transducer device for soft and hard tissues in this utility model.

[0016] Figure 3 This utility model Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0017] Figure 4 This is a schematic diagram of the outermost conductive ring of this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the conductive ring of this utility model connecting the first conductive electrode sheet or the second conductive electrode sheet;

[0019] Figure 6 This is a schematic diagram of the structure of the piezoelectric ceramic of this utility model.

[0020] [Explanation of Labels in the Attached Image]

[0021] 1. Amplifier rod; 11. Connecting rod; 12. Fixed limiting component; 2. Piezoelectric ceramic assembly; 21. Piezoelectric ceramic; 211. Annular body; 212. Inner insulating ring; 213. Outer insulating ring; 22. Insulating component; 3. Conductive ring; 30. Spring part; 4. First conductive electrode plate; 5. Second conductive electrode plate; 6. First insulating sleeve; 7. Second insulating sleeve; 8. Conductive sleeve; 9. Movable limiting component; 91. Nut; 100. Central through hole. Detailed Implementation

[0022] To better explain and facilitate understanding of this utility model, the following description is provided in conjunction with the appendix. Figure 1-6 This invention will be described in detail through specific embodiments. Wherein, directional terms such as "upper" and "lower" are used in this document. Figure 1 The orientation is used as a reference.

[0023] Example 1:

[0024] Reference Figures 1-6 This utility model provides a transducer for soft and hard tissues, including an amplitude transformer 1 and a piezoelectric ceramic assembly 2 sleeved on the amplitude transformer 1. The piezoelectric ceramic assembly 2 includes N piezoelectric ceramics 21 distributed along the axis of the amplitude transformer 1, where N is a natural number. It also includes conductive rings 3 and first conductive electrode plates 4. When N≥2, conductive rings 3 are provided between every two adjacent piezoelectric ceramics 21 and on both sides of the piezoelectric ceramic assembly 2. The conductive rings 3 are arranged perpendicular to the axis of the amplitude transformer 1 and electrically connected to the circular end face of the corresponding piezoelectric ceramic 21. The first conductive electrode plates 4 are electrically connected to the adjacent odd-numbered conductive rings 3. When N≥3, it also includes a second conductive electrode plate 5, which is electrically connected to the adjacent even-numbered conductive rings 3. The first conductive electrode plate 4 and the second conductive electrode plate 5 are located outside the piezoelectric ceramics 21.

[0025] In this embodiment, the transducer for soft and hard tissues includes an amplitude transformer 1 and a piezoelectric ceramic assembly 2 sleeved on it. The piezoelectric ceramic assembly 2 consists of multiple piezoelectric ceramics 21 distributed along the axial direction of the amplitude transformer 1, and the number N is greater than or equal to 2. In addition, there are conductive rings 3 and first conductive electrode plates 4, and their connection method determines the polarization direction of the piezoelectric ceramics 21 and the mode of electrical energy transmission.

[0026] The conductive ring 3 is located not only between adjacent piezoelectric ceramics 21, but also on both axial sides of the outermost piezoelectric ceramic 21 in the piezoelectric ceramic assembly 2. The conductive ring 3 is electrically connected to the circular end face of the corresponding piezoelectric ceramic 21. This connection method ensures that each piezoelectric ceramic 21 can receive electrical energy through the conductive ring 3 and can generate vibration.

[0027] The first conductive electrode 4 is electrically connected to the adjacent odd-numbered conductive rings 3. This connection method forms a special circuit path in the piezoelectric ceramic assembly 2. Specifically, the piezoelectric ceramics 21 are numbered 1, 2, 3, ..., N according to their sequence on the amplitude transformer 1, and the conductive rings 3 are numbered sequentially according to the numbering direction of the piezoelectric ceramics 21 along the axial direction of the amplitude transformer 1. Thus, the first conductive electrode 4 will connect to the conductive rings 3 numbered 1, 3, 5, ..., that is, all the odd-numbered conductive rings 3. This connection method forms an alternating polarization direction among the piezoelectric ceramics 21, thereby ensuring the effectiveness of the transducer for soft and hard tissues and improving the energy conversion efficiency of the transducer for soft and hard tissues.

[0028] At the same time, this electrical connection method can make the structure of transducers for soft and hard tissues more compact, which in turn helps to make transducers for soft and hard tissues more miniaturized.

[0029] Furthermore, due to the aforementioned electrode connection method, the transducer for soft and hard tissues will have higher energy conversion efficiency and a more stable vibration mode. The multilayer piezoelectric ceramic 21 can generate a stronger ultrasonic signal. When alternating voltages are supplied to the piezoelectric ceramic 21, it will vibrate.

[0030] Specifically, when N equals 2, the outermost conductive ring 3 is electrically connected to one power supply electrode, while the middle conductive ring 3 is electrically connected to another power supply electrode.

[0031] In this embodiment, when N≥3, a second conductive electrode 5 is introduced into the transducer for soft and hard tissues. The second conductive electrode 5 is electrically connected to the adjacent even-numbered conductive rings 3, forming another circuit path in the piezoelectric ceramic assembly 2 that is independent of the path connected to the first conductive electrode 4. This design allows for finer electrical control and polarization direction adjustment of the piezoelectric ceramic 21, while ensuring that all even-numbered conductive rings 3 form a unified electrical connection, thereby improving the stability and energy conversion efficiency of the transducer for soft and hard tissues.

[0032] By controlling the voltage and polarity on the first conductive electrode 4 and the second conductive electrode 5 respectively, more precise control of the piezoelectric ceramic 21 can be achieved. Since the polarization direction of the piezoelectric ceramic 21 can be alternately changed, the transducer for soft and hard tissues provides a hardware basis for generating more complex vibration modes, thereby improving the flexibility of the transducer for soft and hard tissues.

[0033] Specifically, the first conductive electrode sheet 4 and the second conductive electrode sheet 5 can be reasonably arranged along the circumferential direction of the piezoelectric ceramic 21, and ensure that there is a sufficient safe distance between adjacent first conductive electrode sheets 4 and second conductive electrode sheets 5 to ensure the insulation performance between the first conductive electrode sheet 4 and the second conductive electrode sheet 5.

[0034] Example 2:

[0035] Reference Figures 1-4 In addition to possessing all the technical solutions of the above embodiments, the embodiments of this utility model further possess the following technical solutions:

[0036] It also includes a first insulating sleeve 6, a second insulating sleeve 7, and a conductive sleeve 8; the first insulating sleeve 6 and the conductive sleeve 8 are disposed on the connecting rod 11 along the axial direction of the connecting rod 11, the conductive sleeve 8 is sleeved on the first insulating sleeve 6 along the axial direction of the connecting rod 11, and the second insulating sleeve 7 is sleeved outside the conductive sleeve 8; when there is an odd number of conductive rings 3, the first and last conductive rings 3 are sleeved outside the conductive sleeve 8 and are both electrically connected to the conductive sleeve 8, while the other conductive rings 3 are all sleeved outside the second insulating sleeve 7; when there is an even number of conductive rings 3, the first and second-to-last conductive rings 3 are sleeved outside the conductive sleeve 8 and are both electrically connected to the conductive sleeve 8, while the other conductive rings 3 are all sleeved outside the second insulating sleeve 7; when the conductive rings 3 are electrically connected to the conductive sleeve 8, the inner ring of the corresponding conductive ring 3 has a spring piece 30 that maintains elastic contact with the conductive sleeve 8.

[0037] In this embodiment, the first insulating sleeve 6 and the second insulating sleeve 7 mainly serve the function of electrical insulation. Figure 3 For example, the first insulating sleeve 6 is used to establish electrical insulation between the conductive ring 3 and the amplitude transformer 1, and the second insulating sleeve 7 is used to establish electrical insulation between the three middle conductive rings 3 and the conductive sleeve 8, to ensure that electrical energy can flow along the designed path and avoid short circuits or energy loss. The insulating sleeves effectively achieve this goal, enabling each conductive electrode plate to work in a predetermined manner.

[0038] The conductive sleeve 8 is arranged along the axial direction of the connecting rod 11, and its position and function depend on the number of conductive rings 3.

[0039] When there is an odd number of conductive rings:

[0040] The first and last conductive rings 3 are fitted over the conductive sleeve 8 and electrically connected to it. This design allows both ends of the transducer for soft and hard tissues to be connected to a power source or other circuits via the conductive sleeve 8, forming a complete electrical circuit. Combined with the electrical connection of the first conductive electrode 4, this further improves the operational stability of the transducer for soft and hard tissues. The other conductive rings 3 are fitted over the second insulating sleeve 7 to maintain electrical isolation from the conductive sleeve 8, thereby improving the operational stability of the transducer for soft and hard tissues.

[0041] When there is an even number of conductive rings:

[0042] The first and penultimate conductive rings 3 are fitted over the conductive sleeve 8 and electrically connected to it. This design, while maintaining the integrity of the electrical circuit, combined with the electrical connection of the first conductive electrode plate 4, can further improve the operational stability of the transducer for soft and hard tissues.

[0043] When the conductive ring 3 is electrically connected to the conductive sleeve 8, the inner ring of the conductive ring 3 has a spring piece 30 that maintains elastic contact with the conductive sleeve 8 to ensure the stability and reliability of the electrical connection between the two.

[0044] Furthermore, the presence of the first insulating sleeve 6, the second insulating sleeve 7, and the conductive sleeve 8 provides dual conductivity protection for the transducer used in soft and hard tissues. Since the first conductive electrode 4 and the second conductive electrode 5 may fail due to melting, for example, when N is an even number, if the first or last first conductive electrode 4 fails to melt, the other first conductive electrode 4 can still maintain conductivity through the conductive sleeve 8, thereby improving the reliability and safety of the transducer used in soft and hard tissues.

[0045] Furthermore, as the transducer used in soft and hard tissues is used for an extended period, not only is there a possibility of the first conductive electrode 4 or the second conductive electrode 5 melting and failing, but the conductive connection between the first conductive electrode 4 and the second conductive electrode 5 and the piezoelectric ceramic 21 is also prone to failure. For example, when N is an even number, if the electrical connection between the first or last first conductive electrode 4 and the first or last piezoelectric ceramic 21 fails, the other first conductive electrodes 4 can still maintain conductivity through the conductive sleeve 8, thereby improving the reliability and safety of the transducer used in soft and hard tissues.

[0046] Furthermore, as the transducer used in soft and hard tissues is used for a longer period of time, the conductive ring and conductive electrode plate will vibrate at high frequency. The high frequency vibration of the electrode plate over a long period of time will cause fatigue and the electrical performance will degrade. The conductive sleeve 8 conducts the signal, thereby improving the reliability and safety of the transducer.

[0047] Example 3:

[0048] Reference Figures 1-6 In addition to possessing all the technical solutions of any of the above embodiments, the embodiments of this utility model further possess the following technical solutions:

[0049] The first conductive electrode plate 4 and the second conductive electrode plate 5 are both located on the outer side of the piezoelectric ceramic 21 away from the axis of the connecting rod 11, and leave space for the piezoelectric ceramic 21 to form an electrical contact point.

[0050] In this embodiment, placing the first conductive electrode 4 and the second conductive electrode 5 on the outside of the piezoelectric ceramic 21 can make more efficient use of space and avoid conflict with the piezoelectric ceramic 21 in the axial direction. This arrangement makes the entire piezoelectric ceramic assembly 2 more compact in structure, which is beneficial to reducing the overall size of the transducer.

[0051] By placing the conductive electrode sheet on the outside of the piezoelectric ceramic 21, the direct mechanical stress on the piezoelectric ceramic 21 can be reduced, thereby reducing the risk of damage caused by vibration or external impact.

[0052] The electrical contact points formed by the first conductive electrode plate 4 and the second conductive electrode plate 5 on the outside of the piezoelectric ceramic 21 need to ensure a stable and reliable electrical connection. These contacts are typically designed to have good conductivity and corrosion resistance to ensure that current can pass smoothly and maintain stable performance during long-term use.

[0053] The electrical contact points are designed to be on the outside of the piezoelectric ceramic 21, which also facilitates connection to external circuits. For example, wires, pins, or other connecting elements can be used to connect the contacts to an external power supply, control circuit, or measuring device.

[0054] The first conductive electrode 4 and the second conductive electrode 5 are respectively connected to adjacent odd-numbered and even-numbered conductive rings 3. This design allows for finer polarization control of the piezoelectric ceramic 21. By adjusting the voltage and polarity on these two conductive electrode plates, precise regulation of the vibration behavior of the piezoelectric ceramic 21 can be achieved, thereby affecting the output characteristics of transducers used in soft and hard tissues.

[0055] In summary, the layout and design of the first conductive electrode plate 4 and the second conductive electrode plate 5 in transducers for soft and hard tissues are of great significance for ensuring the stability of electrical connections, improving electrical performance, and optimizing manufacturing processes. A reasonable layout and design can make transducers for soft and hard tissues perform better, while also making them more convenient to use and maintain.

[0056] Example 4:

[0057] Reference Figure 2In addition to possessing all the technical solutions of any of the above embodiments, the embodiments of this utility model further possess the following technical solutions:

[0058] The amplitude rod 1 includes a connecting rod 11 and a fixed limiting member 12 connected to one end of the connecting rod 11; the transducer for soft and hard tissues also includes a movable limiting member 9 detachably connected to the other end of the connecting rod 11, and the piezoelectric ceramic assembly 2 is sleeved on the connecting rod 11 and located between the movable limiting member 9 and the fixed limiting member 12.

[0059] In this embodiment, the amplitude transformer 1 mainly includes a connecting rod 11 and a fixing and limiting member 12. The connecting rod 11 is the main structure of the amplitude transformer 1. It is responsible for transmitting ultrasonic energy from one end to the other end, while supporting and fixing other components.

[0060] The movable limiting component 9 is detachably connected to one end of the connecting rod 11, allowing for easy installation and removal. The main function of the movable limiting component 9 is to limit the position of the piezoelectric ceramic assembly 2 on the connecting rod 11, preventing it from shifting or falling off during vibration. The movable limiting component 9 includes a nut 91 threadedly connected to the end of the connecting rod 11 to achieve efficient installation and removal of the piezoelectric ceramic assembly 2.

[0061] The fixed limiting member 12 is connected to the other end of the connecting rod 11, such as by setting it as a flange that is an integral part of the connecting rod 11.

[0062] The fixed limiting member 12 and the movable limiting member 9 work together to ensure that the piezoelectric ceramic assembly 2 remains stable during vibration. It also provides a fixed support point, allowing ultrasonic vibrations to be effectively transmitted and amplified on the connecting rod 11.

[0063] Example 5:

[0064] Reference Figures 1-3 In addition to possessing all the technical solutions of Embodiment 5 or 5 described above, the embodiments of this utility model further possess the following technical solutions:

[0065] The piezoelectric ceramic assembly 2 also includes an insulating component 22. The outermost piezoelectric ceramic 21 is provided with an insulating component 22 between the movable limiting component 9 and the fixed limiting component 12.

[0066] In this embodiment, the insulating component 22 is located between the outermost piezoelectric ceramic 21 and the movable limiting component 9 and the fixed limiting component 12, mainly serving as electrical isolation to ensure electrical safety. Furthermore, in conjunction with the first insulating sleeve 6 and the second insulating sleeve 7, it can ensure the safety of product users and patients. The product withstand voltage rating is above 4kV.

[0067] Furthermore, during the long-term operation of transducers used in soft and hard tissues, slight displacements or deformations may occur between components due to factors such as vibration and temperature changes. Without the isolation provided by the insulating component 22, direct contact may occur between the piezoelectric ceramic assembly 2 and the metal components, leading to a short circuit fault. The presence of the insulating component 22 effectively prevents this from happening, protecting the normal operation of the transducers used in soft and hard tissues.

[0068] The insulating component 22 not only provides electrical isolation but also improves the structural stability of transducers used in soft and hard tissues to a certain extent. It can act as a buffer layer between the piezoelectric ceramic assembly 2 and the metal components, reducing energy loss and mechanical stress during vibration transmission, thereby extending the service life of transducers used in soft and hard tissues.

[0069] Specifically, the insulating component 22 can be insulating ceramic.

[0070] Example 6:

[0071] Reference Figure 2 and Figure 3 In addition to possessing all the technical solutions of any of the above embodiments, the embodiments of this utility model further possess the following technical solutions:

[0072] The amplitude rod 1 has a central through hole 100 extending along the axial direction in the middle. The central through hole 100 can serve as a heat dissipation structure for the transducer used in soft and hard tissues. By setting the central through hole 100, the heat dissipation area of ​​the amplitude rod 1 can be increased, making it easier to keep the amplitude rod 1 within a suitable temperature range, thereby ensuring the working efficiency of the transducer used in soft and hard tissues.

[0073] Furthermore, the central through-hole 100 can be used in conjunction with other heat dissipation systems, such as a liquid cooling medium circulation system, to achieve active heat dissipation of the transducer for soft and hard tissues, thereby further improving the heat dissipation effect of the transducer for soft and hard tissues. Specifically, the cooling medium circulation system enables the coolant to flow from one end of the central through-hole 100 to the other end of the central through-hole 100, and in the process, removes some of the heat from the amplitude transformer 1.

[0074] Example 7:

[0075] In addition to possessing all the technical solutions of any of the above embodiments, the embodiments of this utility model further possess the following technical solutions:

[0076] refer to Figure 6 The piezoelectric ceramic 21 includes an annular body 211, an inner insulating ring 212 and an outer insulating ring 213. The inner insulating ring 212 is connected to the inner ring of the annular body 211, and the outer insulating ring 213 is connected to the outer edge of the annular body 211.

[0077] In this embodiment, the piezoelectric ceramic 21 includes an annular body 211, an inner insulating ring 212, and an outer insulating ring 213. The annular body 211 is the core part of the piezoelectric ceramic 21 and is made of a ceramic material with a piezoelectric effect. When a voltage is applied, the annular body 211 also deforms, realizing the conversion of electrical energy into mechanical energy. The inner insulating ring 212 is connected to the inner ring of the annular body 211, that is, it is located around the central hole of the annular body 211. The main function of the inner insulating ring 212 is electrical isolation. Since the annular body 211 may generate charges during operation, the presence of the inner insulating ring 212 can prevent these charges from leaking directly through the central hole, ensuring electrical safety. The outer insulating ring 213 is connected to the outer edge of the annular body 211, that is, it covers the outer surface of the annular body 211. The outer insulating ring 213 also plays a role in electrical isolation, but more importantly, it prevents the annular body 211 from direct contact with the external environment. It can prevent moisture, dust and other impurities from entering the interior of the annular body 211 and affecting the piezoelectric performance; at the same time, it can also prevent external circuits or equipment from causing unnecessary interference or damage to the annular body 211.

[0078] The inner insulating ring 212 and the outer insulating ring 213 can be made of insulating ceramic material.

[0079] Example 8:

[0080] In addition to providing an ultrasonic scalpel, which includes the transducer for soft and hard tissues as described in any of the above embodiments, the present invention also includes a detachable blade head connected to the front end of the amplitude transformer 1. Therefore, the ultrasonic scalpel includes all the beneficial effects of any of the above embodiments, and will not be described in detail here to avoid repetition.

[0081] The blade includes at least twenty types of ultrasonic cutting blades for soft and hard tissues. In other words, the transducer can be adapted to almost all blades, improving the flexibility of using ultrasonic scalpels with this transducer.

[0082] It can be understood that, except for conflicting parts, the above embodiments 1-8 can be freely combined to form other embodiments of this utility model.

[0083] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0084] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0085] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0086] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0087] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A transducer for use in soft and hard tissues, characterized in that: It includes an amplitude transformer (1) and a piezoelectric ceramic assembly (2) sleeved on the amplitude transformer (1). The piezoelectric ceramic assembly (2) includes N piezoelectric ceramics (21) distributed along the axial direction of the amplitude transformer (1), where N is a natural number. It also includes a conductive ring (3) and a first conductive electrode plate (4). When N≥2, the conductive ring (3) is provided between every two adjacent piezoelectric ceramics (21) and on both sides of the piezoelectric ceramic assembly (2). The conductive ring (3) is arranged perpendicular to the axis of the amplitude transformer (1) and is electrically connected to the circular end face of the corresponding piezoelectric ceramic (21). The first conductive electrode plate (4) is electrically connected to the adjacent odd-numbered conductive ring (3). When N≥3, it also includes a second conductive electrode (5), which is electrically connected to the adjacent even-numbered conductive ring (3).

2. The transducer for soft and hard tissues as described in claim 1, characterized in that: It also includes a first insulating sleeve (6), a second insulating sleeve (7), and a conductive sleeve (8); The first insulating sleeve (6) is sleeved on the amplitude rod (1), the conductive sleeve (8) is sleeved on the first insulating sleeve (6), and the second insulating sleeve (7) is sleeved outside the conductive sleeve (8); When there is an odd number of conductive rings (3), the first and last conductive rings (3) are sleeved outside the conductive sleeve (8) and are electrically connected to the conductive sleeve (8), while the other conductive rings (3) are sleeved outside the second insulating sleeve (7); When there is an even number of conductive rings (3), the first and second to last conductive rings (3) are sleeved outside the conductive sleeve (8) and are electrically connected to the conductive sleeve (8), while the other conductive rings (3) are sleeved outside the second insulating sleeve (7).

3. The transducer for soft and hard tissues as described in claim 2, characterized in that: When the conductive ring (3) is electrically connected to the conductive sleeve (8), the inner ring of the conductive ring (3) has a spring piece (30) that maintains elastic contact with the conductive sleeve (8).

4. The transducer for soft and hard tissues as described in claim 3, characterized in that: The first conductive electrode (4) and the second conductive electrode (5) are both located on the outer side of the piezoelectric ceramic (21) away from the axis of the amplitude rod (1), and leave the position of the piezoelectric ceramic (21) to form an electrical connection contact point.

5. The transducer for soft and hard tissues as described in claim 1, characterized in that: The amplitude rod (1) includes a connecting rod (11) and a fixing limiting member (12) connected to one end of the connecting rod (11); The transducer for soft and hard tissues also includes a movable limiting member (9) detachably connected to the other end of the connecting rod (11). The piezoelectric ceramic assembly (2) is sleeved on the connecting rod (11) and located between the movable limiting member (9) and the fixed limiting member (12). The movable limiting member (9) includes a nut (91) threadedly connected to the end of the connecting rod (11).

6. The transducer for soft and hard tissues as described in claim 5, characterized in that: The piezoelectric ceramic assembly (2) also includes an insulating component (22), and the insulating component (22) is provided between the outermost piezoelectric ceramic (21) and the movable limiting component (9) and the fixed limiting component (12).

7. The transducer for soft and hard tissues as described in claim 1, characterized in that: The amplitude rod (1) has a central through hole (100) extending along the axial direction in the middle.

8. The transducer for soft and hard tissues as described in claim 1, characterized in that: The piezoelectric ceramic (21) includes an annular body (211), an inner insulating ring (212) and an outer insulating ring (213). The inner insulating ring (212) is connected to the inner ring of the annular body (211), and the outer insulating ring (213) is connected to the outer edge of the annular body (211).

9. An ultrasonic scalpel, comprising a transducer for soft and hard tissues as claimed in any one of claims 1-8, and further comprising a blade head detachably connected to the front end of the amplitude transformer (1).

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