Transducer for flexible ultrasonic knife

Abstract

The utility model discloses a transducer for a flexible ultrasonic knife, and relates to the technical field of ultrasonic knives, the transducer comprises a connecting block, a support plate, a plurality of piezoelectric ceramic pieces, an amplitude-change pole and a sleeve, the support plate is connected to the front end of the connecting block, and the support plate extends in the front-back direction; the plurality of piezoelectric ceramic pieces are connected with the support plate; the amplitude-change pole is connected to the front end of the connecting block and extends in the front-back direction. The sleeve is detachably connected with the front end of the support plate, and the amplitude-change pole and the support plate are both located in the sleeve. According to the utility model, the amplitude-change pole can strongly vibrate in an effective space, so that the operation requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic scalpels, in particular to a transducer used for flexible ultrasonic scalpels. Background Art

[0002] The transducer of the flexible ultrasonic knife is at the execution end. Since the ultrasonic wave generated by the transducer cannot pass through the curved axis well, the transducer needs to be set between the elbow assembly and the blade head. On the traditional ultrasonic knife, the piezoelectric vibration structure is generally composed of a mass balance block, a piezoelectric transducer and an amplitude transformer. The mass balance block and the amplitude transformer are connected and locked by a solid locking bolt, as shown in the figure. The characteristic of this piezoelectric vibration structure is that the mass balance block, the piezoelectric transducer and the amplitude transformer are arranged in sequence along a straight line. In other words, the three are arranged in a series structure, which makes it difficult to achieve a miniaturized design of the structure. On the flexible ultrasonic knife, the transducer is set between the elbow assembly and the blade head. The installation space of the transducer is limited. The use of a traditional transducer structure will cause insufficient vibration amplitude and it is difficult to meet the requirements of the surgery. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a transducer for a flexible ultrasonic scalpel, which can make the horn vibrate strongly in an effective space to meet the surgical requirements.

[0004] According to the first aspect of the utility model, a transducer for a flexible ultrasonic knife includes: a connecting block, a support plate, a plurality of piezoelectric ceramic sheets, an amplitude change rod, and a sleeve, wherein the support plate is connected to the front end of the connecting block, and the support plate extends in the front-to-back direction; the plurality of piezoelectric ceramic sheets are connected to the support plate; the amplitude change rod is connected to the front end of the connecting block, and the amplitude change rod extends in the front-to-back direction; the sleeve is detachably connected to the front end of the support plate, and the amplitude change rod and the support plate are both located in the sleeve.

[0005] According to the embodiment of the utility model, a transducer for a flexible ultrasonic knife has at least the following beneficial effects: the amplitude change rod is inserted between the piezoelectric ceramic sheets, the piezoelectric ceramic sheets are arranged on the side support plate, the connection between the amplitude change rod and the support plate is realized by the connection block located at the rear end, the piezoelectric ceramic sheets transmit the vibration to the support plate, and the support plate is connected to the amplitude change rod through the connection block, thereby greatly reducing the axial length of the ultrasonic vibration device, saving space, and facilitating miniaturization design. Moreover, the piezoelectric ceramic sheets are surrounded on the radial outer side of the amplitude change rod, which can make the amplitude change rod receive greater ultrasonic energy, so that the amplitude increase under the action of ultrasonic waves is greater, ensuring that the amplitude change rod can vibrate strongly and improving energy utilization.

[0006] According to some embodiments of the utility model, a circular mounting plate is connected to the front end of the bracket plate, a clearance hole for the amplitude changing rod to pass through is opened in the center of the circular mounting plate, and the circular mounting plate is threadedly connected to the sleeve.

[0007] According to some embodiments of the present invention, two bracket plates are symmetrically arranged around the amplitude transformer.

[0008] According to some embodiments of the utility model, the amplitude changing rod includes an amplitude changing head and an amplitude changing body, the amplitude changing body is connected between the amplitude changing head and the connecting block, the cross-sections of the amplitude changing body and the bracket plate are both rectangular, and the amplitude changing body and the bracket plate are arranged in parallel.

[0009] According to some embodiments of the utility model, the piezoelectric ceramic sheet is located on a side of the support plate away from the amplitude transformer, a pressure plate is provided on a side of each piezoelectric ceramic sheet away from the support plate, and the two pressure plates are connected by fastening bolts.

[0010] According to some embodiments of the utility model, a mounting hole for the fastening bolt to pass through is provided on the amplitude varying body.

[0011] According to some embodiments of the utility model, a support tube is sleeved on the fastening bolt, the support tube passes through the mounting hole, and two ends of the support tube are respectively abutted against the two bracket plates.

[0012] According to some embodiments of the present invention, a plurality of the fastening bolts are provided.

[0013] According to some embodiments of the present invention, a heat dissipation fin is provided on a side of the pressure plate away from the bracket plate. According to some embodiments of the present invention, a size of the connection block is smaller than a diameter of an inner wall of the sleeve.

[0014] A transducer for a flexible ultrasonic scalpel according to an embodiment of the utility model has at least the following beneficial effects:

[0015] (1) The horn is inserted between the piezoelectric ceramic sheets, which are arranged on the side support plate. The connection between the horn and the support plate is achieved through the connection block at the rear end. The piezoelectric ceramic sheets transmit the vibration to the support plate, and the support plate is connected to the horn through the connection block, thereby greatly reducing the axial length of the ultrasonic vibration device, saving space, and facilitating miniaturization. In addition, the piezoelectric ceramic sheets are surrounded on the radial outer side of the horn, which can increase the ultrasonic energy received by the horn, so that the amplitude increased under the action of the ultrasonic wave is larger, ensuring that the horn can vibrate strongly and improving energy utilization;

[0016] (2) Tightening the nut 810 drives the two pressure plates to move closer to each other to compress the piezoelectric ceramic sheet. By pressing the pressure plates, the efficiency of installing the piezoelectric ceramic sheet is improved and the difficulty of assembly is reduced;

[0017] (3) The heat dissipation fins are conducive to the transfer of heat from the pressure plate to the air in the sleeve. The heat generated by the piezoelectric ceramic sheet during operation is transferred to the pressure plate through heat conduction. The heat dissipation fins on the surface of the pressure plate are conducive to increasing the heat exchange area, so that the heat on the pressure plate is transferred to the air in the sleeve in the form of convection heat transfer. The air in the sleeve transfers the heat to the sleeve through convection heat transfer. The threads on the inner wall of the sleeve also play a role in increasing the heat exchange area. This solves the problem that the heat generated by the piezoelectric ceramic sheet is not easy to dissipate in a small space.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 A schematic diagram of the overall structure of an embodiment of the utility model;

[0021] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0022] Figure 3 This is a schematic diagram of an embodiment of the utility model after the sleeve is installed;

[0023] Figure 4 A cross-sectional schematic diagram of an embodiment of the utility model;

[0024] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0025] Figure 6 for Figure 4 Enlarged view of point C in the middle;

[0026] Figure 7 for Figure 4 The enlarged view of point D in the middle;

[0027] Figure 8 A cross-sectional schematic diagram of a horn according to an embodiment of the utility model;

[0028] Fig. 9 for Figure 8 Enlarged view of point E in the middle.

[0029] Figure Number:

[0030] Connecting block 100;

[0031] Support plate 200;

[0032] Piezoelectric ceramic sheet 300;

[0033] Amplitude change rod 400, amplitude change head 410, amplitude change body 420, mounting hole 421;

[0034] Sleeve 500;

[0035] Circular mounting plate 600, clearance hole 610;

[0036] A pressing plate 700 and a heat dissipation fin 710;

[0037] Tightening bolt 800 and nut 810;

[0038] Support tube 900. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0042] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0043] Reference Figures 1 to 9As shown, a transducer for a flexible ultrasonic knife according to an embodiment of the utility model comprises: a connecting block 100, a bracket plate 200, a plurality of piezoelectric ceramic sheets 300, a horn 400, and a sleeve 500. The bracket plate 200 is connected to the front end of the connecting block 100, and the bracket plate 200 extends in the front-to-back direction; the bracket plate 200 and the connecting block 100 can be integrally formed or welded together. The advantage of the integral forming of the bracket plate 200 and the connecting block 100 is that the overall strength is high and can be used for a long time in high-intensity vibration, but it has the disadvantage of high manufacturing cost. The bracket plate 200 and the connecting block 100 can be connected by welding to reduce the manufacturing cost, but the connection strength is low and cannot be used for a long time in a high-intensity vibration environment. Multiple piezoelectric ceramic sheets 300 are connected to the bracket plate 200; the piezoelectric ceramic sheets 300 are connected to a high-frequency power supply to convert electrical energy into high-frequency mechanical vibration. During operation, the piezoelectric ceramic sheet 300 is energized, and the piezoelectric ceramic sheet 300 is deformed and vibrates. Since the piezoelectric ceramic sheet 300 is connected to the support plate 200, the piezoelectric ceramic sheet 300 will drive the support plate 200 to vibrate. The horn 400 is connected to the front end of the connecting block 100, and the horn 400 extends in the front-to-back direction; the horn 400 and the connecting block 100 can be integrally formed or welded together. The advantage of the integral forming of the horn 400 and the connecting block 100 is that the overall strength is high and can be used for a long time in high-intensity vibration, but it has the disadvantage of high manufacturing cost. The manufacturing cost can be reduced by connecting the horn 400 and the connecting block 100 by welding, but the connection strength is low and cannot be used for a long time in a high-intensity vibration environment. The horn 400 plays the role of increasing the vibration amplitude, and the length of the horn 400 is positively correlated with the magnitude of the vibration amplitude increased by the horn 400. The sleeve 500 is detachably connected to the front end of the support plate 200, and the horn 400 and the support plate 200 are both located in the sleeve 500. The sleeve 500 plays the role of protecting and supporting the horn 400. The front end of the sleeve 500 is used to install the cutter head, and the rear end of the sleeve 500 is used to connect to the elbow assembly of the flexible ultrasonic knife. The cutter head and the elbow assembly are both prior art, so they are not described in detail. Within the scope allowed by the internal space of the sleeve 500, as many piezoelectric ceramic sheets 300 as possible should be installed. The size of the piezoelectric ceramic sheet 300 should match the size of the support plate 200, so that the side of the piezoelectric ceramic sheet 300 close to the support plate 200 is completely attached to the support plate 200. The piezoelectric ceramic sheet 300 is arranged on the side support plate 200, and the connection between the amplitude transformer 400 and the support plate 200 is realized through the connecting block 100 located at the rear end. The piezoelectric ceramic sheet 300 transmits the vibration to the support plate 200, and the support plate 200 is connected to the amplitude transformer 400 through the connecting block 100, thereby greatly reducing the axial length of the ultrasonic vibration device, saving space, and facilitating miniaturization design.Moreover, the piezoelectric ceramic sheet 300 surrounds the radial outer side of the horn 400, so that the horn 400 can receive greater ultrasonic energy, thereby increasing the amplitude under the action of ultrasonic waves, ensuring that the horn 400 can vibrate strongly and improving energy utilization.

[0044] Reference Figures 1 to 9 As shown, it can be understood that the front end of the bracket plate 200 is connected to a circular mounting plate 600, and the circular mounting plate 600 is integrally formed with the bracket plate 200. A clearance hole 610 for the horn 400 to pass through is provided in the center of the circular mounting plate 600. The gap between the clearance hole 610 and the horn 400 should be greater than the maximum amplitude of the part of the horn 400 located in the clearance hole 610, so as to prevent the horn 400 from hitting the clearance hole 610 when vibrating, and reduce the energy loss caused by the collision. The outer wall of the circular mounting plate 600 is provided with a thread, and the inner wall of the sleeve 500 is also provided with a thread matching the thread provided on the outer wall of the circular mounting plate 600, and the circular mounting plate 600 is threadedly connected with the sleeve 500. The inner wall of the sleeve 500 is provided with a thread, and the surface area of ​​the inner wall of the sleeve 500 can also be increased, which is conducive to the heat generated by the piezoelectric ceramic sheet 300 being transferred to the sleeve 500. It is foreseeable that a suction tube can be mounted on the sleeve 500 to cool the sleeve 500. The specific structure of the suction tube is prior art and will not be described in detail.

[0045] Reference Figures 1 to 9 As shown, it can be understood that two support plates 200 are symmetrically arranged with the horn 400 as the center. The horn 400 is arranged at the center of the sleeve 500. In order to fully utilize the space in the sleeve 500, two support plates 200 are arranged to install the piezoelectric ceramic sheet 300, and the two support plates 200 can make the horn 400 vibrate with uniform force.

[0046] Reference Figures 1 to 9 As shown, it can be understood that the amplitude change rod 400 includes an amplitude change head 410 and an amplitude change body 420, the amplitude change head 410 is connected to the front end of the amplitude change body 420, and the rear end of the amplitude change body 420 is connected to the connection block 100. The cross-sectional size of the amplitude change head 410 is smaller than the cross-sectional size of the amplitude change body 420. The amplitude change head 410 is used to cut human tissue. The cross-sections of the amplitude change body 420 and the bracket plate 200 are both rectangular, and the amplitude change body 420 and the bracket plate 200 are arranged in parallel, so that the amplitude change body 420 and the bracket plate 200 have the same bending deformation direction, which is conducive to the vibration propagation along the amplitude change body 420 and the bracket plate 200, improving energy utilization and increasing vibration amplitude.

[0047] Reference Figures 1 to 9As shown, it can be understood that the piezoelectric ceramic sheet 300 is located on the side of the support plate 200 away from the amplitude rod 400, and a pressure plate 700 is provided on the side of each piezoelectric ceramic sheet 300 away from the support plate 200, and the piezoelectric ceramic sheet 300 is sandwiched between the corresponding pressure plate 700 and the support plate 200. The two pressure plates 700 are connected by a fastening bolt 800. The fastening bolt 800 passes through the two pressure plates 700, and the extension direction of the fastening bolt 800 is perpendicular to the pressure plate 700. There are two fastening nuts 810 on the thread of the fastening bolt 800, and the two fastening nuts 810 are respectively against the side of the two pressure plates 700 away from the support plate 200. The two pressure plates 700 are driven to approach each other by the fastening nuts 810 to compress the piezoelectric ceramic sheet 300. By the way of pressing the pressure plate 700, the efficiency of installing the piezoelectric ceramic sheet 300 is improved and the difficulty of assembly is reduced.

[0048] Reference Figures 1 to 9 As shown, it can be understood that the mounting hole 421 for the fastening bolt 800 to pass through is provided on the amplitude body 420. The gap between the mounting hole 421 and the fastening bolt 800 is larger than the amplitude of the amplitude body 420, so as to prevent the amplitude body 420 from hitting the mounting hole 421 when vibrating, thereby reducing the energy loss caused by the collision. It can be foreseen that in some other embodiments of the utility model, two fastening bolts 800 are arranged in a group in the left and right directions, and the amplitude body 420 passes through the gap in a group of fastening bolts 800. The advantage of this structure is that it is not necessary to drill holes on the amplitude body 420, thereby improving the structural strength of the amplitude body 420.

[0049] Reference Figures 1 to 9 As shown, it can be understood that a support tube 900 is sleeved on the fastening bolt 800, and the support tube 900 is cylindrical and made of high-strength metal. The outer diameter of the support tube 900 is smaller than the inner diameter of the mounting hole 421. The support tube 900 passes through the mounting hole 421, and the two ends of the support tube 900 are respectively against the two bracket plates 200. The gap between the support tube 900 and the mounting hole 421 is greater than the amplitude of the amplitude change body 420 to prevent the amplitude change body 420 from hitting the mounting hole 421 when vibrating, thereby reducing the energy loss caused by the collision. The support tube 900 plays a role in preventing the two bracket plates 200 from getting close to each other. The gap between the bracket plate 200 and the amplitude change body 420 is greater than the amplitude of the amplitude change body 420 to prevent the amplitude change body 420 from hitting the mounting hole 421 when vibrating, thereby reducing the energy loss caused by the collision. The two bracket plates 200 transmit vibration through the support tube 900, which is conducive to the synchronous vibration of the two bracket plates 200 to improve the energy utilization efficiency.

[0050] Reference Figures 1 to 9As shown, it can be understood that there are multiple fastening bolts 800. Arranging multiple fastening bolts 800 can make the connection between the two pressure plates 700 more stable. It can be foreseen that increasing the number of fastening bolts 800 can increase the stability of the connection structure, but it will occupy the installation space of the piezoelectric ceramic sheet 300. Reducing the number of piezoelectric ceramic sheets 300 will cause the power of driving the bracket plate 200 to vibrate to decrease, thereby causing the vibration amplitude of the horn 400 to decrease. Reducing the number of fastening bolts 800 can increase the installation space of the piezoelectric ceramic sheet 300. Increasing the number of piezoelectric ceramic sheets 300 will cause the power of driving the bracket plate 200 to vibrate to increase, thereby causing the vibration amplitude of the horn 400 to increase, but it will reduce the stability of the connection structure. Therefore, the number of fastening bolts 800 is preferably two or four. The piezoelectric ceramic sheets 300 are arranged side by side in the front-to-back direction, and gaps are left between adjacent piezoelectric ceramic sheets 300 to facilitate the installation of fastening bolts 800.

[0051] Reference Figures 1 to 9 As shown, it can be understood that a heat sink 710 is provided on the side of the pressing plate 700 away from the bracket plate 200. The heat sink 710 can increase the heat exchange area. The heat sink 710 is conducive to the transfer of heat from the pressing plate 700 to the air in the sleeve 500. The heat generated by the piezoelectric ceramic sheet 300 during operation is transferred to the pressing plate 700 in the form of heat conduction. The heat sink 710 on the surface of the pressing plate 700 is conducive to increasing the heat exchange area, so that the heat on the pressing plate 700 is transferred to the air in the sleeve 500 in the form of convection heat transfer. The air in the sleeve 500 transfers the heat to the sleeve 500 in the form of convection heat transfer. The threads on the inner wall of the sleeve 500 also play a role in increasing the heat exchange area. The problem that the heat generated by the piezoelectric ceramic sheet 300 is not easy to dissipate in a small space is solved.

[0052] It is understandable that the size of the connection block 100 is smaller than the diameter of the inner wall of the sleeve 500. Since the piezoelectric ceramic sheet 300 needs to be connected to a high-frequency power source through wires, a gap needs to be left between the connection block 100 and the inner wall of the sleeve 500 to allow the wires to pass through. Passing the wires through the sleeve 500 is beneficial to waterproofing and reducing the size of the device. How to connect the piezoelectric ceramic sheet 300 to electricity and how to control it are well-known contents in the prior art and will not be elaborated here.

[0053] Working principle: When working, the piezoelectric ceramic piece 300 is energized, and the piezoelectric ceramic piece 300 is deformed and vibrates. Since the piezoelectric ceramic piece 300 is connected to the bracket plate 200, the piezoelectric ceramic piece 300 will drive the bracket plate 200 to vibrate. The bracket plate 200 drives the connecting block 100 to vibrate, the connecting block 100 drives the amplitude change body 420 to vibrate, and the amplitude change body 420 drives the amplitude change head 410 to vibrate. In the process of vibration transmission, the amplitude is gradually increased, which ensures that the amplitude change rod 400 can vibrate strongly and meet the surgical requirements. The heat generated by the piezoelectric ceramic piece 300 is transferred to the pressing plate 700 in the form of heat conduction. The heat dissipation fins 710 on the surface of the pressing plate 700 are conducive to increasing the heat exchange area, so that the heat on the pressing plate 700 is transferred to the air in the sleeve 500 in the form of convection heat exchange, and the air in the sleeve 500 transfers the heat to the sleeve 500 in the form of convection heat exchange.

[0054] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A transducer for a flexible ultrasonic scalpel, characterized in that: include: ConnectBlock(100); A support plate (200) connected to the front end of the connection block (100), the support plate (200) extending in the front-rear direction; A plurality of piezoelectric ceramic sheets (300) connected to the support plate (200); A horn (400) connected to the front end of the connection block (100), the horn (400) extending in the front-rear direction; A sleeve (500) is detachably connected to the front end of the support plate (200), and the amplitude transformer (400) and the support plate (200) are both located in the sleeve (500).

2. The transducer for a flexible ultrasonic scalpel according to claim 1, characterized in that: The front end of the support plate (200) is connected to a circular mounting plate (600), the center of the circular mounting plate (600) is provided with a clearance hole (610) for the amplitude transformer (400) to pass through, and the circular mounting plate (600) is threadedly connected to the sleeve (500).

3. The transducer for a flexible ultrasonic scalpel according to claim 1, characterized in that: Two support plates (200) are symmetrically arranged with the amplitude transformer (400) as the center.

4. The transducer for a flexible ultrasonic scalpel according to claim 3, characterized in that: The amplitude changing rod (400) comprises an amplitude changing head (410) and an amplitude changing body (420); the amplitude changing body (420) is connected between the amplitude changing head (410) and the connecting block (100); the cross sections of the amplitude changing body (420) and the bracket plate (200) are both rectangular; the amplitude changing body (420) and the bracket plate (200) are arranged in parallel.

5. The transducer for a flexible ultrasonic scalpel according to claim 4, characterized in that: The piezoelectric ceramic sheet (300) is located on a side of the support plate (200) away from the amplitude transformer (400), and a pressure plate (700) is provided on a side of each piezoelectric ceramic sheet (300) away from the support plate (200), and the two pressure plates (700) are connected by fastening bolts (800).

6. The transducer for a flexible ultrasonic scalpel according to claim 5, characterized in that: The amplitude-changing body (420) is provided with a mounting hole (421) for the fastening bolt (800) to pass through.

7. The transducer for a flexible ultrasonic scalpel according to claim 6, characterized in that: A support tube (900) is sleeved on the fastening bolt (800), and the support tube (900) passes through the mounting hole (421). Two ends of the support tube (900) respectively abut against the two bracket plates (200).

8. The transducer for a flexible ultrasonic scalpel according to claim 5, characterized in that: A plurality of the fastening bolts (800) are provided.

9. The transducer for a flexible ultrasonic scalpel according to claim 5, characterized in that: A heat dissipation fin (710) is provided on a side of the pressing plate (700) away from the bracket plate (200).

10. The transducer for a flexible ultrasonic scalpel according to claim 1, characterized in that: The size of the connection block (100) is smaller than the diameter of the inner wall of the sleeve (500).

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