Transmission device of ultrasonic surgical knife

Abstract

This utility model proposes a transmission device for an ultrasonic scalpel, including a base on which a rotating gear and a rotating transmission gear are rotatably connected. The rotating gear is controlled by a motor, and the rotating transmission gear meshes with a rotating connecting member. The rotating connecting member is connected to the base via a bearing and fixed to the outer sleeve of the scalpel shaft via a pin. A splitting gear shaft is rotatably connected to the base. The splitting transmission member includes two side portions and a connecting portion. The splitting gear shaft meshes with teeth on the connecting portion. A cylindrical pin is fixed between the two side portions, passing through a through hole in a support fixed to the base. The splitting gear shaft is controlled by the motor, causing the splitting transmission member to rise or fall on the side meshing with the splitting gear shaft, with the cylindrical pin as the hinge point. A stop post is provided on the inner wall of the two side portions, and a groove is provided circumferentially on the outer wall of the sleeve, with the stop post located in the groove. The splitting transmission member drives the sleeve to move, and the sleeve is connected to the inner sleeve of the scalpel shaft. The above transmission device has a simple structure and high reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of minimally invasive surgical instruments, in particular to a transmission device of an ultrasonic scalpel. Background Art

[0002] In minimally invasive surgery, ultrasonic scalpel is a commonly used surgical instrument, such as Figure 1 As shown, the transducer 2 connects the ultrasonic scalpel 1 and the ultrasonic scalpel host 3 for energy transmission; the foot pedal 4 is connected to the ultrasonic scalpel host 3 for controlling the amount of energy transmitted. The foot pedal 4 generally has two pedals, which are used to transmit high energy and low energy respectively. As an energy-type surgical instrument with both cutting and hemostasis functions, the ultrasonic scalpel has many advantages such as high cutting accuracy, reliable blood vessel closure, low thermal damage, and good safety. It can well meet the high requirements of traditional minimally invasive surgery for cutting and hemostasis instruments. At present, the transmission structure of the ultrasonic scalpel used in minimally invasive surgical robots is relatively complex and has low reliability. In addition, the product manufacturing process is time-consuming and labor-intensive. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the present application proposes a transmission device for an ultrasonic surgical knife.

[0004] In order to achieve the above-mentioned purpose, the present application proposes a transmission device of an ultrasonic surgical knife, including a base, on which a self-rotating gear and a self-rotating transmission gear are rotatably connected respectively, the self-rotating gear and the self-rotating transmission gear are meshed, the self-rotating gear is controlled by an external motor to be able to rotate, the self-rotating transmission gear is meshed with a self-rotating connecting member, the self-rotating connecting member is connected to the base via a bearing, the self-rotating connecting member is fixedly connected to the outer sleeve of the shank of the ultrasonic surgical knife via a pin, and an opening and closing gear shaft is also rotatably connected to the base, the opening and closing gear shaft is meshed with the opening and closing transmission member, the opening and closing transmission member is U-shaped, including two side portions and a connecting portion connected therebetween, the opening and closing gear shaft is meshed with teeth arranged on the outer side wall of the connecting portion, the two side portions are away from the side of the opening and closing gear shaft, and a cylindrical Pin, the cylindrical pin passes through a through hole set on the support seat, the cylindrical pin can rotate relative to the support seat, the support seat is fixedly set on the base, the opening and closing gear shaft is controlled by an external motor to rotate, so that the opening and closing transmission member takes the cylindrical pin as a hinge point, and the side of the opening and closing transmission member meshing with the opening and closing gear shaft performs an upward or downward movement with the rotation of the opening and closing gear shaft; stop columns are provided on the inner walls of the two side edges of the opening and closing transmission member, the sleeve passes through the space surrounded by the opening and closing transmission member and the cylindrical pin in the up and down directions, and a groove is provided in the circumferential direction on the outer wall of the sleeve in the space, and the two stop columns are located at the grooves, and when the opening and closing transmission member moves in the up and down directions, it can drive the sleeve to move in the up and down directions, and the sleeve is connected to the inner sleeve of the knife rod.

[0005] In some embodiments, the through hole provided on the support seat is an oblong hole with a preset stroke along the up and down direction. The cylindrical pin can move up and down along the oblong hole under the action of external force. A spring is also provided in the oblong hole, one end of the spring is connected to the bottom inner wall of the oblong hole, and the other end is connected to the cylindrical pin.

[0006] In some embodiments, the base is also connected to a shell, and the transmission device is protected by the shell.

[0007] The beneficial effect of the scheme of the present application is that the transmission device of the ultrasonic scalpel has a simple structure, high reliability, time-saving and labor-saving production and manufacturing process, convenient assembly, and time cost saving. The combination of a handheld ultrasonic scalpel and a gear transmission structure is realized, and it can be used in a minimally invasive surgical robot. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A schematic diagram of an ultrasonic surgical blade system is shown.

[0009] Figure 2A schematic structural diagram of a transmission device of an ultrasonic surgical knife in an embodiment is shown.

[0010] Figure 3 A schematic diagram of the connection of the sleeve, the self-rotating connector, the bearing, the rubber-coated pin, and the knife rod in the embodiment is shown.

[0011] Figure 4 A partial structural schematic diagram of a transmission device in an embodiment is shown.

[0012] Figure 5 The schematic diagram of the structure of the transmission device in the embodiment after partial sectioning is shown.

[0013] Figure 6 A schematic diagram showing the structural relationship between the opening and closing transmission member and the sleeve in the embodiment is shown.

[0014] Figure 7 A schematic diagram showing the opening and closing principle of the ultrasonic surgical knife in the embodiment is shown.

[0015] Figure markings: 1-ultrasonic scalpel, 2-transducer, 3-ultrasonic scalpel main unit, 4-foot pedal, 1-1-base, 1-2-self-rotating gear, 1-3-self-rotating transmission gear, 1-4-opening and closing transmission member, 1-5-opening and closing gear shaft, 1-6-sleeve, 1-7-knife rod, 1-8-self-rotating connecting member, 1-9-bearing, 1-10-rubber-coated pin, 1-11-cylindrical pin, 1-12-spring, 1-13-inner sleeve, 1-14-pin shaft, 1-15-clamping arm, 1-16-knife head; 1-17-support seat, 1-18-oblong hole, 1-19-groove, 1-20-blocking column, 1-21-outer sleeve. DETAILED DESCRIPTION

[0016] The specific implementation of the present application is further described below in conjunction with the accompanying drawings.

[0017] In the description of the present application, it should be understood that the terms "first", "second", etc. are used to distinguish similar objects, rather than to describe or indicate a specific order or sequence. The terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0018] like Figures 2 to 7As shown, the transmission device of the ultrasonic surgical knife involved in the present application includes a base 1-1, and the base 1-1 is rotatably connected with a self-rotating gear 1-2 and a self-rotating transmission gear 1-3, the self-rotating gear 1-2 and the self-rotating transmission gear 1-3 are meshed with each other, the self-rotating gear 1-2 is controlled by an external motor to be able to rotate, the self-rotating transmission gear 1-3 is meshed with a self-rotating connecting member 1-8, the self-rotating connecting member 1-8 is connected to the base 1-1 via a bearing 1-9, the self-rotating connecting member 1-8 is fixedly connected to the outer sleeve 1-21 of the knife rod 1-7 via a rubber-coated pin 1-10, the knife rod 1-7 of the ultrasonic surgical knife includes an inner sleeve 1-13 and an outer sleeve 1-21 which are sleeved together, the inner sleeve 1-13 can only move a preset stroke relative to the outer sleeve 1-21 along the axial direction (up and down direction) of the knife rod 1-7, the structure and connection relationship between the two belong to the prior art and will not be elaborated here.

[0019] The base 1-1 is also rotatably connected with an opening and closing gear shaft 1-5, which is meshed with the opening and closing transmission member 1-4, and the two form a staggered axis helical gear structure. The opening and closing transmission member 1-4 is U-shaped, including two side portions and a connecting portion connected therebetween. The opening and closing gear shaft 1-5 is meshed with teeth arranged on the outer wall of the connecting portion. The two side portions are away from one side of the opening and closing gear shaft 1-5, and a cylindrical pin 1-11 is fixedly connected between the two. The cylindrical pin 1-1 1 passes through a through hole provided on the support seat 1-17, the cylindrical pin 1-11 can rotate relative to the support seat 1-17, the support seat 1-17 is fixedly provided on the base 1-1, the opening and closing gear shaft 1-5 is controlled by an external motor to rotate, so that the opening and closing transmission member 1-4 takes the cylindrical pin 1-11 as a hinge point, and the side of the opening and closing transmission member 1-4 meshing with the opening and closing gear shaft 1-5 moves up or down as the opening and closing gear shaft 1-5 rotates.

[0020] In order to avoid the risk of the opening and closing transmission member 1-4 and the opening and closing gear shaft 1-5 being disengaged due to excessive motor power, the through hole arranged on the support seat 1-17 is an oblong hole 1-18 with a preset stroke along the up and down direction. The cylindrical pin 1-11 can move up and down along the oblong hole 1-18 under the action of external force. A spring 1-12 is also arranged in the oblong hole 1-18. One end of the spring 1-12 is connected to the bottom inner wall of the oblong hole 1-18, and the other end is connected to the cylindrical pin 1-11. When the motor power is too large, the cylindrical pin 1-11 moves downward, thereby compressing the spring 1-12 downward.

[0021] The inner walls of the two side portions of the opening and closing transmission member 1-4 are provided with stopper columns 1-20, the sleeve 1-6 passes through the space surrounded by the opening and closing transmission member 1-4 and the cylindrical pin 1-11 in the up-down direction, and a groove 1-19 is circumferentially provided on the outer wall of the sleeve 1-6 in the space, and two stopper columns 1-20 are located in the groove 1-19, when the opening and closing transmission member 1-4 moves in the up-down direction, the sleeve 1-6 can be driven to move in the up-down direction. The sleeve 1-6 is connected to the inner sleeve 1-13 of the knife bar 1-7.

[0022] The base 1 - 1 may also be connected to a shell, through which the transmission device is protected.

[0023] During specific use, when the self-rotating gear 1-2 is driven to rotate, the self-rotating transmission gear 1-3 and the self-rotating connecting member 1-8 will rotate accordingly, thereby driving the outer sleeve 1-21 of the knife rod 1-7 to rotate. Since the inner sleeve 1-13 of the knife rod 1-7 can only move axially along a preset stroke relative to the outer sleeve 1-21, the inner sleeve 1-13 and the sleeve 1-6 will also rotate, thereby realizing the self-rotation function of the ultrasonic surgical knife 1.

[0024] When the opening and closing gear shaft 1-5 is driven to rotate, the opening and closing transmission member 1-4 can be hinged with the cylindrical pin 1-11, and the side of the opening and closing transmission member 1-4 that is meshed with the opening and closing gear shaft 1-5 can rise or fall with the rotation of the opening and closing gear shaft 1-5, thereby driving the sleeve 1-6 to move in the up and down directions. Since the sleeve 1-6 is connected to the inner sleeve 1-13 of the knife rod 1-7, and the inner sleeve 1-13 of the knife rod 1-7 can only move relative to the outer sleeve 1-21 along the The scalpel 1 is moved axially with a preset stroke, so only the inner sleeve 1-13 of the shank 1-7 moves up and down. When the inner sleeve 1-13 of the shank 1-7 moves downward, the clamping arm 1-15 in the ultrasonic scalpel 1 rotates clockwise around the pin 1-14 to realize the opening function of the ultrasonic scalpel 1; when the inner sleeve 1-13 of the shank 1-7 moves upward, the clamping arm 1-15 rotates counterclockwise around the pin 1-14 to realize the closing of the clamping arm 1-15 relative to the blade 1-16. Specifically, the structure of other parts of the ultrasonic scalpel 1 belongs to the prior art, such as the connection relationship between the inner sleeve 1-13, the clamping arm 1-15, the pin 1-14, and the blade 1-16, etc., which will not be repeated here.

[0025] The transmission device of the ultrasonic scalpel involved in the present application has a simple structure, high reliability, time-saving and labor-saving manufacturing process, convenient assembly, and time cost saving. It realizes the combination of a handheld ultrasonic scalpel and a gear transmission structure, and can be used in a minimally invasive surgical robot.

[0026] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical solution and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A transmission device for an ultrasonic surgical knife, characterized in that: The invention comprises a base, on which a self-rotating gear and a self-rotating transmission gear are rotatably connected respectively, the self-rotating gear and the self-rotating transmission gear are meshed with each other, the self-rotating gear is controlled by an external motor to be able to rotate, the self-rotating transmission gear is meshed with a self-rotating connecting member, the self-rotating connecting member is connected to the base via a bearing, the self-rotating connecting member is fixedly connected to the outer sleeve of the knife rod of the ultrasonic surgical knife via a pin, and an opening and closing gear shaft is also rotatably connected to the base, the opening and closing gear shaft is meshed with the opening and closing transmission member, the opening and closing transmission member is U-shaped, including two side portions and a connecting portion connected therebetween, the opening and closing gear shaft is meshed with teeth arranged on the outer side wall of the connecting portion, the two side portions are away from one side of the opening and closing gear shaft, a cylindrical pin is fixedly connected between the two, and the cylindrical pin passes through a The cam is provided with a through hole, the cylindrical pin can rotate relative to the support seat, the support seat is fixedly arranged on the base, the opening and closing gear shaft is controlled by an external motor to rotate, so that the opening and closing transmission member takes the cylindrical pin as a hinge point, and the side of the opening and closing transmission member meshing with the opening and closing gear shaft performs an ascending or descending movement with the rotation of the opening and closing gear shaft; stop columns are provided on the inner walls of the two side edges of the opening and closing transmission member, the sleeve passes through the space surrounded by the opening and closing transmission member and the cylindrical pin in the up and down directions, and a groove is provided in the circumferential direction on the outer wall of the sleeve in the space, and the two stop columns are located in the grooves, and when the opening and closing transmission member moves in the up and down directions, it can drive the sleeve to move in the up and down directions, and the sleeve is connected to the inner sleeve of the knife rod.

2. The transmission device of the ultrasonic surgical knife according to claim 1, characterized in that: The through hole arranged on the support seat is an oblong hole with a preset stroke along the up and down direction. The cylindrical pin can move up and down along the oblong hole under the action of external force. A spring is also arranged in the oblong hole. One end of the spring is connected to the bottom inner wall of the oblong hole, and the other end is connected to the cylindrical pin.

3. The transmission device of the ultrasonic surgical knife according to claim 1, characterized in that: The base is also connected to a shell, and the transmission device is protected by the shell.

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