Blade assembly for ultrasonic scalpel

Abstract

The present invention discloses a blade rod assembly suitable for an ultrasonic scalpel, comprising: a blade rod body, a blade holder, and a transducer group connected in sequence; wherein the blade rod body comprises an outer tube and an inner tube embedded in the outer tube; the blade holder comprises a sleeve having a hollow inner cavity extending through both axial ends thereof and an adapter sleeved on the outer side of the sleeve and adapted to move axially along the sleeve; the sleeve is connected to the transducer group, and the sleeve is also adapted to simultaneously drive the outer tube and the inner tube to perform circumferential rotational motion; and the adapter is connected to the inner tube via at least one connector penetrating the side wall of the sleeve so that the adapter drives the inner tube to perform axial motion within the outer tube. The present invention can optimize the performance of the blade rod assembly used on an ultrasonic scalpel of a minimally invasive surgical robot, and by reusing the blade rod body and the blade head of the blade rod assembly, the overall instrument cost of the surgical instrument used in patient surgery can be reduced, thereby reducing the patient's surgical cost, thus having significant clinical value.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a knife rod assembly suitable for an ultrasonic knife. Background Art

[0002] During robotic-assisted minimally invasive surgery, a dedicated channel is typically created through a cannula. Surgeons use slender minimally invasive instruments to enter this channel and perform surgical procedures within the abdominal cavity. Among minimally invasive surgical instruments, the ultrasonic scalpel is a new type of surgical cutting and hemostasis device. It consists of a main unit, a handle connecting cable, a transducer, a blade, and a foot pedal. The main unit converts 50Hz or 60Hz current into 55.5kHz high-frequency alternating current, which is transmitted to the transducer via connecting cables. The transducer contains several groups of piezoelectric crystals. These crystals oscillate at the same frequency under the influence of the high-frequency current, converting high-frequency electrical energy into high-frequency mechanical energy. This energy is then transmitted to the blade through a mechanical device, causing the metal blade to oscillate at ultrasonic frequencies. High-power ultrasonic waves can instantly vaporize water in tissue cells in contact with the blade, breaking protein hydrogen bonds and causing cell disintegration, thereby incising the tissue. Frictional heat generated by the mechanical vibration simultaneously coagulates and stops bleeding.

[0003] For example, the publication number CN108784788A discloses a liquid-conducting ultrasonic knife head, including a clamp rod outer tube, an inner tube body which is axially relatively movably connected to the clamp rod outer tube is provided in the clamp rod outer tube, a waveguide rod is provided in the inner tube body, the front end of the waveguide rod extends beyond the clamp rod outer tube and the front end of the inner tube body and forms a knife rod head, a clamp head is provided between the front end of the inner tube body and the front end of the clamp rod outer tube, the clamp head and the knife rod head are arranged opposite to each other, the rear end of the clamp head is hinged to the front end of the clamp rod outer tube and the hinge axis therebetween is a static hinge axis, the rear end of the clamp head is hinged to the front end of the inner tube body and the hinge axis therebetween is a dynamic hinge axis, the static hinge axis and the dynamic hinge axis are parallel to each other and are respectively located on both sides of the knife rod head, and the side portion of the front end of the inner tube body is provided with a liquid-conducting structure connecting the inner and outer sides of the inner tube body.

[0004] The inner and outer tubes of the ultrasonic scalpel disclosed in the above-mentioned document are hinged together by the forceps head. The inner and outer tubes should be kept relatively stationary in the radial direction, otherwise a torsional force will be generated, which will adversely affect the blade structure. This is not a problem when used in manual laparoscopic surgery (when the doctor manually rotates the ultrasonic scalpel), but when used in minimally invasive surgical robots, the following technical defects will occur:

[0005] 1. In minimally invasive surgical robots, the ultrasonic scalpel cannot rotate as a whole, and the outer tube cannot be directly fixed to the instrument box housing, making it difficult to ensure that the inner and outer tubes are relatively stationary in the radial direction;

[0006] 2. In minimally invasive surgical robots, the rotation of the blade is achieved by rotating the blade rod. The existing technology has failed to solve the problem of how to rotate the inner and outer tubes at the same time.

[0007] Therefore, the overall performance of the knife rod assembly disclosed in the prior art is poor when used in minimally invasive surgical robots. Summary of the Invention

[0008] The object of the present invention is to provide a knife rod assembly suitable for an ultrasonic scalpel, so as to achieve the technical effect of optimizing the performance of the knife rod assembly on an ultrasonic scalpel used in a minimally invasive surgical robot.

[0009] The blade rod assembly suitable for the ultrasonic scalpel of the present invention is realized as follows:

[0010] A knife bar assembly suitable for an ultrasonic knife, comprising: a knife bar body, a knife seat and a transducer group connected in sequence; wherein the knife bar body comprises an outer tube and an inner tube built in the outer tube;

[0011] The tool holder includes a sleeve having a hollow inner cavity extending through both axial ends thereof and an adapter sleeved on the outer side of the sleeve and adapted to move along the axial direction of the sleeve;

[0012] The sleeve is connected to the transducer assembly, and the sleeve is also suitable for simultaneously driving the outer tube and the inner tube to perform circumferential rotational motion; and

[0013] The adapter is connected to the inner tube via at least one connector penetrating the side wall of the sleeve so that the adapter drives the inner tube to move axially in the outer tube.

[0014] In an optional embodiment of the present invention, the transducer group includes a transducer connector connected to the sleeve and a transducer connection seat connected to the transducer connector; wherein

[0015] The transducer connector is detachably connected to the sleeve via a forked tongue.

[0016] In an optional embodiment of the present invention, the end of the sleeve for connecting to the transducer connector is provided with a conical connector;

[0017] The outer diameter of the conical connector gradually decreases along the direction from the sleeve to the transducer connector; and the outer diameter of the cone bottom of the conical connector is smaller than the outer diameter of the sleeve; and

[0018] A positioning groove with an inner diameter smaller than the outer diameter of the cone bottom of the conical connector is formed at the junction of the conical connector and the sleeve.

[0019] In an optional embodiment of the present invention, the forked tongue comprises a plurality of tongue pieces of equal axial length enclosing a cylindrical structure, and a separation groove is formed between each two adjacent tongue pieces; and

[0020] A positioning protrusion suitable for being embedded in the positioning groove is formed on the inner wall of each tenon.

[0021] In an optional embodiment of the present invention, the connecting member is a screw or a pin; and

[0022] Positioning holes for matching and fixing the connecting piece are respectively provided on the side walls of the adapter and the inner tube.

[0023] In an optional embodiment of the present invention, a movable groove suitable for the connecting member to pass through is formed on the side wall of the sleeve;

[0024] When the adapter moves along the axial direction of the sleeve, the engaging member is adapted to move along the movable groove.

[0025] In an optional embodiment of the present invention, the side wall of the sleeve is further provided with at least one limiting groove distributed along the axial direction thereof and recessed toward the axial center of the sleeve; and

[0026] The inner wall of the adapter is further provided with at least one limiting block distributed along the axial direction thereof and protruding toward the axial center direction of the adapter, which is adapted to the limiting groove in a one-to-one manner.

[0027] In an optional embodiment of the present invention, the outer tube is interference-fitted with the inner cavity wall of the sleeve.

[0028] In an optional embodiment of the present invention, the axial end of the outer tube inserted into the sleeve is recessed with at least two clamping grooves; and

[0029] At least two clamping blocks are formed on the inner cavity wall of the sleeve and are in one-to-one interference fit with the clamping grooves.

[0030] In an optional embodiment of the present invention, the outer wall of the sleeve is further integrally formed with or assembled with a gear ring.

[0031] Compared with the prior art, the beneficial effect of the present invention is that the knife rod assembly suitable for the ultrasonic knife of the present invention, through the coordinated cooperation between the sleeve, the adapter, the inner tube and the outer tube, makes the inner tube and the outer tube not only rotate together with the sleeve, but the inner tube itself can also make axial movement relative to the outer tube. When the knife rod assembly with such a structure is used in a minimally invasive surgical robot, the overall operational flexibility is better.

[0032] In addition, for the overall inner tube and outer tube, the outer tube is matched with the sleeve, and the inner tube is connected to the adapter. The cooperation between the adapter and the sleeve allows the inner tube and the outer tube to maintain relative stillness in the radial dimension, completely eliminating sliding friction, thereby avoiding relative torsion between the two in the radial dimension, thereby effectively ensuring the transmission accuracy and service life of the tool rod assembly in the process of driving the tool head movement during application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is an overall structural diagram of a knife rod assembly suitable for an ultrasonic knife according to the present invention;

[0034] Figure 2 This is an exploded structural diagram of a knife rod assembly suitable for an ultrasonic knife according to the present invention;

[0035] Figure 3 This is a diagram showing the matching structure of the sleeve, adapter, inner tube, exterior, and transducer connector of the blade rod assembly suitable for an ultrasonic scalpel of the present invention;

[0036] Figure 4 for Figure 3 E-direction cross-sectional schematic diagram;

[0037] Figure 5 It is a cross-sectional schematic diagram of a sleeve of a knife rod assembly suitable for an ultrasonic knife of the present invention;

[0038] Figure 6 Schematic diagram of a transducer connector of a blade rod assembly suitable for an ultrasonic scalpel according to the present invention;

[0039] Figure 7 Schematic diagram of an adapter suitable for a blade rod assembly of an ultrasonic scalpel according to the present invention.

[0040] Numbers in the figure: shank body 1, outer tube 11, inner tube 12, vibration rod 13, cutting surface 131, clamping groove 14, knife seat 2, sleeve 21, adapter 22, connector 23, positioning hole 24, movable groove 25, limit groove 26, limit block 27, toothed ring 28, annular groove 29, transducer connector 3, tenon 31, separation groove 32, positioning protrusion 33, transducer connecting seat 4, bearing 5, conical connector 6, positioning groove 61, avoidance groove 7, ultrasonic knife head 8. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] Example 1:

[0043] See also Figures 1 to 6 As shown, the present invention provides a knife rod assembly suitable for an ultrasonic knife, which can be used in a minimally invasive surgical robot to connect an ultrasonic knife head 8 to realize the opening and closing and rotational movement of the ultrasonic knife.

[0044] Specifically, the tool rod assembly of this embodiment includes: a tool rod body 1, a tool holder 2 and a transducer group connected in sequence; wherein the tool rod body 1 includes an outer tube 11 and an inner tube 12 embedded in the outer tube 11. It should be noted that the inner tube 12 here is an embedded structure relative to the outer tube 11. This embedded only means that from the radial dimension, the inner tube 12 is inside and the outer tube 11 is outside, and does not mean that the entire inner tube 12 is located inside the outer tube 11 from the axial dimension. That is to say, from the axial dimension, at least one axial end of the inner tube 12 can be located outside the outer tube 11. The interior of the inner tube 12 here is a vibration rod 13. By forming one or a pair of cutting surfaces 131 on the axial outer side wall of the vibration rod 13, under this structure, the outer wall surface of the entire vibration rod 13 is no longer a circular structure, and a corresponding mating surface conforming to the above-mentioned cutting surface 131 is formed in the inner cavity of the inner tube 12, so that the entire vibration rod 13 cannot rotate in the inner tube 12. The vibration rod 13 is connected to the transducer group, receives energy provided by the transducer group to vibrate at high frequency, and cooperates with the openable and closable forceps head of the ultrasonic knife connected to the knife rod assembly, such as the ultrasonic knife, to achieve the function of the ultrasonic knife cutting tissue.

[0045] To further detail, regarding the tool holder 2, it includes a sleeve 21 with a generally cylindrical structure. It should be noted that this embodiment, in conjunction with the accompanying drawings, uses a sleeve 21 with a circular cross-section as an example. Of course, the cross-section of the sleeve 21 here can also be equivalently replaced with a rectangular or irregular shape. From the perspective of general conventional use, which is convenient and easy to process and form, the cross-section of the sleeve 21 is designed to be circular. Regardless of the cross-sectional shape of the sleeve 21, since the adapter 22 is sleeved on the outside of the sleeve 21, as long as the shape of the inner cavity of the adapter 22 is matched with the shape of the sleeve 21, the sleeve 21 can be connected to each other.

[0046] The sleeve 21, with its circular cross-section, has a hollow interior with openings extending through the hollow interior at both axial ends. When the adapter 22 and sleeve 21 are in a sleeved engagement, they can still move along the axial direction of the sleeve 21. This means that the adapter 22 and sleeve 21 are relatively stationary in the radial dimension, meaning that the adapter 22 cannot rotate radially relative to the sleeve 21.

[0047] Furthermore, the sleeve 21 is connected to the transducer group, and the sleeve 21 is also suitable for simultaneously driving the outer tube 11 and the inner tube 12 to rotate in the circumferential direction. Generally speaking, in one case, the sleeve 21 here can be fixedly connected to the transducer group so that when the sleeve 21 rotates, the transducer group can move synchronously with the sleeve 21. Specifically, since the amplitude of the rotational movement required to be performed by the ultrasonic scalpel inside the human body is relatively small, even if the transducer group rotates synchronously with the sleeve 21, the rotation amplitude generated is also within a small range, so it will not affect the normal use of the transducer group. In another case, the sleeve 21 can also rotate with the transducer group so that when the sleeve 21 rotates, the transducer group will not produce synchronous movement, and the adapter 22, the inner tube 12 and the outer tube 11 will all rotate with the rotation of the sleeve 21.

[0048] In addition to the above structure, it should be noted that in addition to the rotational motion of the adapter 22 and inner tube 12 with the rotation of the sleeve 21, the adapter 22 is also connected to the inner tube 12 via at least one connector 23 extending through the sidewall of the sleeve 21, allowing the adapter 22 to drive the inner tube 12 to move axially within the outer tube 11. This axial motion of the inner tube 12 within the outer tube 11 drives the opening and closing of a connected blade assembly, such as an ultrasonic scalpel. Specifically, the up and down motion of the inner tube 12 drives the opening and closing of the ultrasonic scalpel (the pliers head in the ultrasonic scalpel, with the vibrating rod 13 being substantially stationary).

[0049] In summary, when the adapter 22 moves axially along the sleeve 21, the inner tube 12 also undergoes synchronous axial movement. Thus, during use, the entire arbor assembly allows the adapter 22 and inner tube 12 to not only move axially but also rotate radially, while the sleeve 21 and outer tube 11 can only rotate radially. The movement of the various components of this embodiment is achieved through the following structure, which is merely illustrated in conjunction with the accompanying drawings as a specific and feasible solution.

[0050] First, the connector 23 is a screw or pin, and positioning holes 24 are provided on the sidewalls of the adapter 22 and the inner tube 12 for receiving and securing the connector 23. In other words, the connector 23 ensures that the adapter 22 and the inner tube 12 maintain good synchronization throughout the use of the arbor assembly.

[0051] Since the inner tube 12 is internally mounted within the sleeve 21, while the adapter 22 is sleeved outside the sleeve 21, in order to allow the connector 23 to connect to both the inner tube 12 and the adapter 22 simultaneously, a movable groove 25 is formed on the sidewall of the sleeve 21 in this embodiment, which is suitable for the connector 23 to pass through. Regarding this movable groove 25, it is important to note that the movable groove 25 is generally arranged along the axial direction of the sleeve 21, i.e., the entire movable groove 25 has a certain length. Therefore, the movable groove 25 not only allows the connector 23 to pass through, but also provides the required space for the connector 23 to move synchronously with the axial movement of the adapter 22. In other words, when the adapter 22 moves axially along the sleeve 21, the connector 23 is suitable for moving along the movable groove 25. The movable groove 25 can be rectangular or waist-shaped, or other shapes are also possible. As long as it provides the required space for the connector 23 to move, it will meet the requirements of this embodiment.

[0052] Secondly, based on the above structure, in order to maintain relative radial stability between the inner tube 12 and the outer tube 11 through the cooperation between the adapter 22 and the sleeve 21, thereby preventing relative radial torsion between the two, the side wall of the sleeve 21 of this embodiment is further provided with, for example but not limited to, two stop grooves 26 distributed along its axial direction and recessed in the direction of the sleeve 21's axis. The cross-section of the stop grooves 26 in the radial direction can be, for example but not limited to, an arc. The stop grooves 26 here can be formed on the side wall surface where the movable groove 25 is provided, or can be provided away from the side wall surface where the movable groove 25 is provided, and this embodiment is not absolutely limited to this. On this basis, the inner wall of the adapter 22 is further provided with a stop block 27 distributed along its axial direction and protruding in the direction of the adapter 22's axis, which is one-to-one compatible with the stop groove 26. With this structure, the adapter and sleeve 21 cannot produce relative rotation in the radial dimension.

[0053] On the basis of the above structure, it should be noted that the limiting groove 26 not only prevents the change joint and the sleeve 21 from rotating in the radial dimension, but also improves the convenience of the processing operation of the movable groove 25 when the movable groove 25 in the above structure is formed in the limiting groove 26.

[0054] Furthermore, regarding the fit between the outer tube 11 and the sleeve 21, this embodiment employs an interference fit. Specifically, the outer tube 11 and the inner wall of the sleeve 21 are interference-fitted. For example, to facilitate processing, the axial end of the outer tube 11 inserted into the sleeve 21 is recessed with at least two engaging grooves 14, and at least two clamping blocks are formed on the inner wall of the sleeve 21, interfering with the engaging grooves 14 in a one-to-one manner. It should be noted that the number of engaging grooves 14 and clamping blocks can also be other. The accompanying drawings of this embodiment only illustrate two engaging grooves 14 and two clamping blocks, but this is not an absolute limitation. Furthermore, the arrangement of the engaging grooves 14 and clamping blocks can be reversed, i.e., the clamping blocks can be formed on the outer tube 11 while the engaging grooves 14 are formed on the inner wall of the sleeve 21. This situation can also meet the requirements of this embodiment.

[0055] In addition, regarding the sleeve 21 of this embodiment, this embodiment also has the following design:

[0056] First, a toothed ring 28 is integrally formed or assembled on the outer wall of the sleeve 21. The design of the toothed ring 28 here facilitates the sleeve 21 to be coupled with a power structure for driving the sleeve 21 to rotate.

[0057] Secondly, a bearing 5 is also connected to the outer wall of the sleeve 21, so that the sleeve 21 can be assembled to the supporting structure through the bearing 5 to achieve the fixation of the sleeve 21 in the radial dimension.

[0058] As for the adapter 22 of this embodiment, considering that the adapter 22 needs to drive the inner tube 12 to move along the axial direction of the sleeve 21, a power structure is required to realize it, so an annular groove 29 is formed on the outer wall of the adapter 22 for matching the above-mentioned power structure, so that the power structure can cooperate with the annular groove 29 to drive the adapter 22 to move.

[0059] Next, the cooperation between the transducer assembly and the sleeve 21 of this embodiment will be described:

[0060] The transducer assembly includes a transducer connector 3 connected to the sleeve 21 and a transducer connection base 4 connected to the transducer connector 3. The transducer connection base 4 can be implemented using any conventional method, and this embodiment does not impose any absolute limitation thereto. The transducer connector 3 is detachably connected to the sleeve 21 via a split tongue.

[0061] In more detail, the end of the sleeve 21 for connecting the transducer connector 3 is protruded with a conical connector 6; specifically, the outer diameter of the conical connector 6 gradually decreases along the sleeve 21 toward the transducer connector 3; and the outer diameter of the cone bottom of the conical connector 6 is smaller than the outer diameter of the sleeve 21; the design of the conical connector 6 here can improve the convenience and efficiency of assembly and disassembly of the sleeve 21 and the transducer connector 3.

[0062] Based on the above structure, a positioning groove 61 having an inner diameter smaller than the outer diameter of the cone base of the conical connector 6 is formed at the junction of the conical connector 6 and the sleeve 21 of this embodiment. The split tongue includes multiple tenons 31 of equal axial length, forming a cylindrical structure. The specific number of tenons 31 is not absolutely limited in this embodiment. A separation groove 32 is formed between each two adjacent tenons 31. A positioning protrusion 33 suitable for embedding into the positioning groove 61 is formed on the inner wall of each tenon 31. The separation groove 32 formed between the two adjacent tenons 31 allows the conical connector 6 of the transducer connector 3 and the sleeve 21 to deform appropriately during assembly. After the transducer structure and the sleeve 21 are assembled, the positioning protrusion 33 will fit neatly into the positioning groove 61. In this structure, the cooperation between the positioning protrusion 33 and the positioning groove 61 achieves a slip-proof effect between the transducer connector 3 and the sleeve 21. In summary, the disassembly and assembly process between the forked tongue and the sleeve 21 adopted in this embodiment is a simple plug-in and pull-out operation. Medical staff do not need to be trained to implement this operation, and no multiple people need to cooperate during the implementation process, that is, one person can complete it, which improves the convenience of using the overall structure.

[0063] It should be noted that the tightness of the fit between the split tongue formed by the multiple tenons 31 and the tapered connector 6 in this embodiment determines whether the resulting transducer assembly and sleeve 21 can rotate relative to each other or not. Since the fit between the transducer assembly and sleeve 21 here can be either relatively rotatable or non-rotatable, the use requirements of this embodiment are met. Therefore, this embodiment does not impose an absolute limit on the tightness of the fit between the split tongue and the tapered connector 6.

[0064] What needs to be explained about the above structure is that, for the multiple tenons 31, in this embodiment, it is only necessary to keep the axial lengths of the multiple tenons 31 equal, and as for their widths in the circumferential direction, the multiple tenons 31 can be the same or more than the same; similarly, for the multiple dividing grooves 32, the specific groove spacing of each dividing groove 32 can be the same or more than the same, and this embodiment does not make an absolute limitation on this.

[0065] In addition, it is necessary to explain that the split tongue and sleeve 21 used in this embodiment are a detachable connection structure. Under such a structure, during the separation of the split tongue and sleeve 21, the outer tube 11 and the inner tube 12 can be separated from the transducer group along with the knife holder 2. During this process, the vibration rod 13 connected to the transducer group will also be synchronously separated from the inner tube 12 and the outer tube 11. After completing the above disassembly operation, the outer tube 11 and the inner tube 12 together with the knife holder 2 and the vibration rod 13 connected to the transducer group are disinfected respectively, so as to facilitate the reuse of the above structure after disinfection and reassembly. In this process, the cutter head 8 will also be disinfected and reused as the cutter bar body 1 is disassembled and assembled. It is found through actual use that the cutter bar body 1 and the cutter head 8 here can be reused about 5 times after disinfection. With such a design, the detachable structure of the forked tongue and the sleeve 21 connecting the shank body 1 in the shank assembly suitable for the ultrasonic scalpel of this embodiment can facilitate the disinfection and reuse of the shank body 1 and the blade head 8, thereby reducing the overall instrument cost of the surgical instrument during the patient's surgery, thereby reducing the patient's surgical cost, and therefore has significant clinical value.

[0066] Example 2:

[0067] See also Figure 7 As shown, based on the blade rod assembly applicable to the ultrasonic scalpel of Example 1, the blade rod assembly applicable to the ultrasonic scalpel provided in this embodiment further has the following structural improvements:

[0068] When the length of the sleeve 21 is limited, based on the fact that the transducer connector 3 is sleeved on the outside of the conical connector 6, in order to avoid the transducer structure sleeved with the conical connector 6 from affecting the adapter 22 and being interfered with by the transducer connector 3 when it moves along the axial direction of the sleeve 21 toward the transducer connector 3, this embodiment forms an annular avoidance groove 7 on the inner wall of the adapter 22 along the axial direction from the adapter 22 toward the axial end of the transducer connector 3, and the axial depth of the avoidance groove 7 is less than the axial length of the adapter 22, so that when the adapter 22 moves to the transducer connector 3, the transducer connector 3 will partially extend into the avoidance groove 7 of the adapter 22.

[0069] The above specific embodiments further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0070] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0071] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0072] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0073] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0074] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A knife bar assembly suitable for an ultrasonic knife, characterized in that it comprises: A tool rod body, a tool holder and a transducer group are connected in sequence; wherein the tool rod body includes an outer tube and an inner tube built into the outer tube; The tool holder includes a sleeve having a hollow inner cavity extending through both axial ends thereof and an adapter sleeved on the outer side of the sleeve and adapted to move along the axial direction of the sleeve; The sleeve is connected to the transducer assembly, and the sleeve is also suitable for simultaneously driving the outer tube and the inner tube to perform circumferential rotational motion; and The adapter is connected to the inner tube via at least one connector penetrating the side wall of the sleeve so that the adapter drives the inner tube to move axially in the outer tube; a movable groove is formed on the side wall of the sleeve for the connector to penetrate; When the adapter moves along the axial direction of the sleeve, the connecting member is adapted to move along the movable groove; the side wall of the sleeve is further provided with at least one limiting groove distributed along the axial direction thereof and recessed toward the axial center of the sleeve; and The inner wall of the adapter is further provided with at least one limiting block distributed along its axial direction and protruding toward the axial center of the adapter, which is one-to-one matched with the limiting groove; the outer tube is interference-fitted with the inner cavity wall of the sleeve.

2. The blade rod assembly suitable for an ultrasonic scalpel according to claim 1, characterized in that: The transducer group includes a transducer connector connected to the sleeve and a transducer connection seat connected to the transducer connector; wherein The transducer connector is detachably connected to the sleeve via a forked tongue.

3. The blade rod assembly suitable for an ultrasonic scalpel according to claim 2, characterized in that: The end of the sleeve used for connecting to the transducer connector is provided with a conical connector; The outer diameter of the conical connector gradually decreases along the direction from the sleeve to the transducer connector; and the outer diameter of the cone bottom of the conical connector is smaller than the outer diameter of the sleeve; and A positioning groove with an inner diameter smaller than the outer diameter of the cone bottom of the conical connector is formed at the junction of the conical connector and the sleeve.

4. The blade rod assembly suitable for an ultrasonic scalpel according to claim 3, characterized in that: The split tongue comprises a plurality of tenon pieces of equal axial length enclosing a cylindrical structure, and a separation groove is formed between each two adjacent tenon pieces; and A positioning protrusion suitable for being embedded in the positioning groove is formed on the inner wall of each tenon.

5. The blade rod assembly suitable for an ultrasonic scalpel according to claim 1, characterized in that: The connecting members are screws or pins; and Positioning holes for matching and fixing the connecting piece are respectively provided on the side walls of the adapter and the inner tube.

6. The blade rod assembly suitable for an ultrasonic scalpel according to claim 1, characterized in that: The shaft end of the outer tube inserted into the sleeve is recessed with at least two clamping grooves; and At least two clamping blocks are formed on the inner cavity wall of the sleeve and are in one-to-one interference fit with the clamping grooves.

7. The blade rod assembly suitable for an ultrasonic scalpel according to claim 1, characterized in that: The outer wall of the sleeve is also integrally formed with or assembled with a gear ring.

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