Ultrasonic knife device with rotatable knife bar

Abstract

The ultrasonic scalpel device comprises a base, an instrument rod, an inner rod, a scalpel head, the scalpel rod, a scalpel head transmission mechanism and a scalpel rod rotating mechanism. The instrument rod is of a hollow structure, one end of the instrument rod is located in the base, the inner rod is movably arranged on the instrument rod and is of a hollow structure, and the cutter rod is rotatably arranged in the inner rod; the tool bit transmission mechanism is connected with the inner rod and can drive the tool bit to be opened and closed through the inner rod. The cutter bar rotating mechanism is fixedly connected with the cutter bar through a cutter bar fixing pin, and the cutter bar rotating mechanism is used for driving the cutter bar to rotate; the cutter bar rotating mechanism is arranged in the base, the input end of the cutter bar rotating mechanism is connected with the first input part, and the first input part is fixed in the base and suitable for being externally connected with a driving device. The ultrasonic knife device disclosed by the utility model is beneficial to grasping and pulling tissues, the operation time can be shortened, and the working efficiency of doctors can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical apparatus and instruments, in particular to an ultrasonic knife device with rotatable blade bar. BACKGROUND

[0002] The ultrasonic knife, also known as ultrasonic cutting hemostatic knife, works by converting electrical energy into high-frequency mechanical energy through piezoelectric ceramics in the transducer, and the high-frequency mechanical vibration of the blade bar acts on the tissue to coagulate the protein of the tissue, achieving the effect of stripping the tissue and closing the blood vessels. Compared with the traditional electric knife, the ultrasonic knife causes less damage to the tissue, so it is increasingly used in clinical applications.

[0003] In the prior art, the blade bar of the ultrasonic knife is fixed relative to the overall instrument, which limits its flexibility to some extent. In order for the blade bar to obtain high-frequency vibration energy of a specific frequency, the front end of the blade bar is designed to be smooth, and although there is a toothed structure on the blade head, when the ultrasonic knife is closed, the blade bar is parallel to the blade head, and the gripping force after closure is small, which is not conducive to the operation of the surgery. SUMMARY

[0004] To solve the above technical problems, the technical scheme provided by the utility model is as follows:

[0005] An ultrasonic knife device with rotatable blade bar, comprising a base, an instrument rod, an inner rod, a blade head, a blade bar, a blade head transmission mechanism, and a blade bar rotation mechanism; the instrument rod is a hollow structure, one end of the instrument rod is located in the base, the inner rod is movably arranged in the instrument rod, the inner rod is a hollow structure, and the blade bar is rotatably arranged in the inner rod; the blade head transmission mechanism is connected to the inner rod and can drive the blade head to open and close through the inner rod; the blade bar rotation mechanism is fixedly connected to the blade bar through a blade bar fixing pin, and is used to drive the blade bar to rotate; the blade bar rotation mechanism is arranged in the base, the input end of the blade bar rotation mechanism is connected to a first input part, and the first input part is fixed in the base and adapted to be externally connected to a driving device.

[0006] Further, the blade head transmission mechanism comprises a blade head gear assembly and a blade head lead screw, the blade head gear assembly can drive the blade head lead screw to move axially, the blade head gear assembly is arranged in the base, the input end of the blade head gear assembly is connected to a second input part, and the second input part is fixed in the base and adapted to be externally connected to a driving device.

[0007] Further, the blade bar rotation mechanism comprises a blade bar driving gear, a blade bar intermediate gear, and a blade bar driven gear, the blade bar driving gear is installed in cooperation with the first input part; the blade bar driving gear is engaged with the blade bar intermediate gear, the blade bar intermediate gear is engaged with the blade bar driven gear, and the blade bar driven gear is fixedly connected to the blade bar.

[0008] Further, the ultrasonic knife device further comprises a rotating assembly, the rotating assembly can drive the instrument rod and the inner rod to rotate, the rotating assembly comprises a rotating driving gear and a rotating driven gear meshing with the rotating driving gear.

[0009] Further, the rotating driven gear is a hollow structure, one end of the instrument rod penetrates into the hollow structure of the rotating driven gear, the rotating driven gear is provided with rotating driven gear holes arranged opposite along the circumference, the instrument rod is provided with instrument rod holes arranged opposite along the circumference, and the inner rod is provided with an inner rod waist hole at a corresponding position.

[0010] Further, the connecting pin is two, the driven gear holes and the instrument rod holes are two groups respectively, each group comprises two holes, the two driven gear holes of each group are arranged opposite, and the two instrument rod holes of each group are arranged opposite; the inner rod waist hole comprises two; each connecting pin penetrates through a group of driven gear holes, a group of instrument rod holes and an inner rod waist hole.

[0011] Further, the rotating driving gear is matched with the third input part, and the third input part is fixed in the base and is suitable for being connected with a driving device.

[0012] Further, the first input part is a knife rod chuck, the second input part is a knife head chuck, and the third input part is a rotating chuck.

[0013] Further, the knife rod is provided with a knife rod rubber sleeve, and the knife rod fixing pin is provided with a knife rod fixing pin rubber sleeve.

[0014] The knife rod rotatable ultrasonic knife device can rotate 90 degrees according to the arc of the knife rod head, and forms a sharp end closed middle hollow pincer structure with the knife head, so that the tissue can be gripped and pulled, and the knife rod can rotate independently of the knife head and the instrument rod through the gear structure in the base.

[0015] After the design is adopted, the ultrasonic knife device has at least the following advantages:

[0016] 1. The gripping force of the ultrasonic knife is improved, the tissue can be gripped and pulled, the operation time is shortened, and the operation efficiency of the doctor is improved.

[0017] 2. The knife rod rotates independently of the instrument rod and the knife head, and the flexibility of the instrument operation is improved.

[0018] 3. The ultrasonic knife device has the advantages of simple structure, good effect, low cost and easy process implementation. DRAWINGS

[0019] The above is only a summary of the technical scheme of the ultrasonic knife device, in order to more clearly understand the technical means of the ultrasonic knife device, the ultrasonic knife device will be further described in detail in combination with the drawings and the specific embodiments.

[0020] Figure 1 It is the whole structure schematic view of the ultrasonic knife device of the utility model;

[0021] Figure 2 It is the knife head end section view schematic view of the ultrasonic knife device of the utility model;

[0022] Figure 3 It is the knife head and knife head rotating shaft cooperation schematic view of the ultrasonic knife device of the utility model;

[0023] Figure 4 It is the inside structure schematic view of the base of the ultrasonic knife device of the utility model

[0024] Figure 5 It is the base section view schematic view of the ultrasonic knife device of the utility model;

[0025] Figure 6 It is the rotating driving gear structure schematic view of the ultrasonic knife device of the utility model

[0026] Figure 7 It is the connecting pin and inner rod cooperation structure schematic view of the ultrasonic knife device of the utility model;

[0027] Figure 8 It is the knife rod before rotating state schematic view of the ultrasonic knife device of the utility model;

[0028] Figure 9 It is the knife rod after rotating state schematic view of the ultrasonic knife device of the utility model.

[0029] The reference signs, 10 base, 11 middle layer support, 20 instrument rod, 21 inner rod, 211 inner rod waist type hole, 311 knife head driving gear, 312 knife head driven gear, 32 knife head screw rod, 33 knife head chuck, 411 knife rod driving gear, 412 knife rod intermediate gear, 413 knife rod driven gear, 43 knife rod chuck, 44 knife rod fixed pin, 441 knife rod fixed pin rubber sleeve, 45 first blocking ring, 46 second blocking ring, 50 knife head, 51 knife head rotating shaft, 52 rotating pin, 60 knife rod, 61 knife rod rubber sleeve, 601 knife rod waist type hole, 71 rotating driving gear, 72 rotating driven gear, 73 rotating chuck, 74 connecting pin. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0031] In the present document, "upper", "lower", and the like are used only to indicate relative positional relationship between relevant parts, rather than to limit the absolute position of the relevant parts.

[0032] Referring to the drawings Figures 1-8 A kind of knife bar rotatable ultrasonic knife device, comprising: base 10, instrument rod 20, inner rod 21, tool bit 50, knife bar 60, tool bit transmission mechanism, knife bar rotating mechanism;Instrument rod 20 is hollow structure, one end of the instrument rod is located in base 10, inner rod 21 is movably arranged in instrument rod 20, inner rod 21 is hollow structure, knife bar 60 is rotatably arranged in inner rod 21;Tool bit transmission mechanism is connected with inner rod 21 and can drive tool bit 50 to open and close by inner rod 21;Knife bar rotating mechanism is fixedly connected with knife bar 60 by knife bar fixed pin 44, and knife bar rotating mechanism is used to drive knife bar 60 to rotate;Knife bar rotating mechanism is arranged in base 10 and the input end of knife bar rotating mechanism is connected with first input part, and first input part is fixed in base 10 and is suitable for external driving device.

[0033] Tool bit transmission mechanism includes tool bit gear assembly 31 and tool bit lead screw 32, tool bit gear assembly 31 can drive tool bit lead screw 32 axial motion, tool bit gear assembly 31 is arranged in base 10 and the input end of tool bit gear assembly 31 is connected with second input part, and second input part is fixed in base 10 and is suitable for external driving device.

[0034] Tool bit gear assembly 31 includes a plurality of gears, preferably, tool bit gear assembly 31 includes tool bit driving gear 311 and tool bit driven gear 312 meshed with tool bit driving gear 311, tool bit driving gear 311 is connected with second input part, and tool bit driven gear 312 is provided with threads in the middle, which cooperate with tool bit lead screw 32;Wherein, second input part is tool chuck 33, tool chuck 33 is installed in cooperation with tool bit driving gear 311, tool chuck 33 can be externally connected with surgical robot, surgical robot can drive tool chuck 33 to rotate, tool chuck 33 rotation drives tool bit driving gear 311 to rotate synchronously, tool bit driving gear 311 rotation drives tool bit driven gear 312 to rotate, tool bit driven gear 312 rotation drives tool bit lead screw 32 axial motion through threads.Tool bit lead screw 32 top end is fixed into one end of inner rod 21, preferably, the fixing mode is welding, tool bit lead screw 32 axial motion drives inner rod 21 to move up and down axially.Two tool shafts 51 are provided on tool bit 50, two tool shafts 51 are respectively installed in two round holes 211 corresponding provided on the other end of inner rod 21, in addition, rotation pin 52 is also provided, rotation pin 52 passes through two rotation pin holes corresponding provided on the one end of instrument rod 20 and tool bit through hole corresponding provided on tool bit 50, tool bit 50 can rotate around rotation pin 52.When inner rod 21 moves axially, tool bit 50 is driven to rotate around rotation pin 52 through tool shaft 51, so that the closing and opening of tool bit 50 are realized.

[0035] The tool bar rotating mechanism comprises a plurality of gears, preferably, the tool bar rotating mechanism comprises a tool bar driving gear 411, a tool bar intermediate gear 412 and a tool bar driven gear 413, the tool bar driving gear 411 is matched and installed with the first input part, preferably, the first input part is the tool bar chuck 43; the tool bar driving gear 411 is engaged with the tool bar intermediate gear 412, and the tool bar intermediate gear 412 is engaged with the tool bar driven gear 413. The tool bar driven gear 413 is fixedly connected with the tool bar 60, preferably, the tool bar driven gear 413 and the tool bar 60 are connected through the tool bar fixing pin 44. The tool bar chuck 43 can be externally connected with a surgical robot, the surgical robot can drive the tool bar chuck 43 to rotate, the tool bar chuck 43 can drive the tool bar driving gear 411 to synchronously rotate, the tool bar driving gear 411 drives the tool bar intermediate gear 412 to rotate, the tool bar intermediate gear 412 drives the tool bar driven gear 413 to rotate, and the tool bar driven gear 413 drives the tool bar to rotate. Since the tool bar head has a curved portion with an arc, after the tool bar rotates by a certain angle such as 90 degrees, the curved portion is opposite to the tool head, at this time, the curved portion and the tool head form a pointed end closed intermediate hollow gripper structure, which is beneficial to gripping and pulling the tissue. The state before the tool bar rotates is shown in FIG. 6, and the state after the tool bar rotates is shown in FIG. 7. Figure 7 Figure 8

[0036] The base 10 is provided with a middle layer support 11, the tool bar driving gear 411 passes through the base 10 and the middle layer support 11 and is limited by the first stop ring 45. The tool bar 60 is provided with a tool bar rubber sleeve 61, the tool bar fixing pin 44 is provided with a tool bar fixing pin rubber sleeve 441, the tool bar fixing pin passes through the tool bar driven gear 411, the tool bar rubber sleeve and the tool bar to fix the tool bar and the tool bar driven gear together. The setting of the rubber sleeve can effectively eliminate the damage of the device caused by the rigid collision between the components.

[0037] ​​The ultrasonic knife device further comprises a rotating assembly which can rotate the instrument rod 20 and the inner rod 21. The rotating assembly comprises a rotating driving gear 71 and a rotating driven gear 72 engaged with the rotating driving gear 71, the rotating driven gear 72 is a hollow structure, one end of the instrument rod 20 penetrates into the hollow structure of the rotating driven gear, the rotating driven gear 72 is provided with rotating driven gear holes arranged in a circle and opposite to each other, the instrument rod 20 is provided with instrument rod holes arranged in a circle and opposite to each other, and the inner rod 21 is provided with an inner rod waist hole 211 at a corresponding position, a connecting pin 74 penetrates through the rotating driven gear holes, the instrument rod holes and the inner rod waist hole 211, and the size of the inner rod waist hole 211 is set so that the axial movement of the inner rod is not affected by the connecting pin. Further, the connecting pin 74 is two, the driven gear holes and the instrument rod holes are two groups respectively, each group comprises two holes, the two driven gear holes of each group are arranged correspondingly, and the two instrument rod holes of each group are arranged correspondingly. The inner rod waist hole 211 comprises two. Each connecting pin penetrates through a group of driven gear holes, a group of instrument rod holes and an inner rod waist hole respectively. The rotating driving gear 71 is matched and installed with a third input part, the third input part is fixed in the base 10 and is adapted to be externally connected with a driving device, preferably, the third input part is a rotating chuck 73, the rotating chuck 73 can be externally connected with a surgical robot, the surgical robot can drive the rotating chuck 73 to rotate, the rotating chuck 73 can drive the rotating driving gear 71 to rotate synchronously, the rotating driving gear 71 drives the rotating driven gear 72 to rotate when rotating, and the rotating driven gear 72 drives the instrument rod 20 and the inner rod 21 to rotate together when rotating. Due to the arrangement of the inner rod waist hole 211, the connecting pin 74 does not limit the axial movement of the inner rod, and the axial movement of the inner rod is not affected by the connecting pin 74.

[0038] It should be noted that the knife rod rotating mechanism and the rotating assembly work independently, when the knife rod rotating mechanism rotates the knife rod, the instrument rod and the inner rod are not affected, and when the rotating assembly rotates the instrument rod and the inner rod, the knife rod is not affected. Therefore, when operating the instrument, if it is necessary to rotate the instrument rod, the inner rod and the knife rod at the same time, the rotating assembly and the knife rod rotating assembly need to work at the same time, at this time, the output of the surgical robot is set to make the knife rod rotating chuck and the rotating chuck work synchronously, so as to drive the instrument rod, the inner rod and the knife rod to rotate synchronously.

[0039] The base 10 and the middle layer support 11 are both provided with a tool bit chuck bearing, and the tool bit chuck 33 penetrates through the bearing and is fixed. A second retaining ring 46 for limiting the axial movement of the tool bit chuck 33 can be sleeved on the tool bit chuck 33, and the second retaining ring 46 is arranged on the middle layer support 11. The tool bit chuck 33 can be prevented from being offset and dislocated under the vibration of the motor and other driving devices, the stability of the tool bit chuck 33 assembly is effectively improved, and the stability of the ultrasonic knife is further ensured; in addition, one bearing or two bearings are arranged on the rotating driven gear, the tool bit driven gear and the knife rod driven gear, and the arrangement of the bearings can improve the smoothness of the gear rotation.

[0040] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0041] It is to be understood that the application is not limited to the precise construction described in the specification and shown in the drawings, and that various modifications and changes can be effected therein by those skilled in the art without departing from the scope of the application. The scope of the application is to be limited only by the appended claims.

Claims

1. A knife bar rotatable ultrasonic knife device, characterized by: The utility model relates to a surgical instrument, which comprises: a base, an instrument rod, an inner rod, a knife head, a knife rod, a knife head transmission mechanism, and a knife rod rotating mechanism. The instrument rod is hollow, one end of the instrument rod is located in the base, the inner rod is movably arranged in the instrument rod, the inner rod is hollow, and the knife rod is rotatably arranged in the inner rod.

2. The rotatable ultrasonic blade assembly of claim 1, wherein the ultrasonic blade assembly is configured to rotate about the longitudinal axis of the ultrasonic blade assembly. The knife head transmission mechanism is connected to the inner rod and can drive the knife head to open and close through the inner rod.

3. The ultrasonic blade assembly of claim 1 or 2, wherein the blade holder is configured to rotate about the longitudinal axis of the blade holder. The knife rod rotating mechanism is fixedly connected to the knife rod through a knife rod fixing pin and is used for driving the knife rod to rotate.

4. The rotatable ultrasonic blade assembly of claim 2, wherein the blade bar is rotatable about the longitudinal axis of the blade bar. The knife rod rotating mechanism is arranged in the base, and an input end of the knife rod rotating mechanism is connected to a first input part.

5. The rotatable ultrasonic blade assembly of claim 4, wherein the blade bar is rotatable about the longitudinal axis of the blade bar. The first input part is fixed in the base and is adapted to be externally connected to a driving device.

6. The ultrasonic blade assembly of claim 5, wherein the blade holder is configured to rotate the ultrasonic blade about the longitudinal axis of the ultrasonic blade. The second input part is fixed in the base and is adapted to be externally connected to a driving device.

7. The rotatable ultrasonic blade assembly of claim 4, wherein the blade holder is configured to rotate the ultrasonic blade about the longitudinal axis of the ultrasonic blade. The third input part is fixed in the base and is adapted to be externally connected to a driving device.

8. The rotatable ultrasonic blade assembly of claim 7, wherein the blade bar is rotatable about the longitudinal axis of the blade bar. The first input part is a knife rod chuck, the second input part is a knife head chuck, and the third input part is a rotating chuck.

9. The rotatable ultrasonic blade assembly of claim 1, wherein the blade assembly is configured to rotate about the longitudinal axis of the blade assembly. The knife rod is provided with a knife rod rubber sleeve, and the knife rod fixing pin is provided with a knife rod fixing pin rubber sleeve.

Images