Ultrasonic knife device with telescopic 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 transmission 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 in the instrument rod and is of a hollow structure, and the cutter rod is movably 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 tool bar transmission mechanism is used for driving the tool bar to stretch out and draw back in the axial direction. The cutter bar transmission mechanism comprises a cutter bar gear assembly and a cutter bar lead screw, the cutter bar lead screw is fixedly connected with the cutter bar, the cutter bar gear assembly can drive the cutter bar lead screw to axially move, the cutter bar lead screw axially moves to drive the cutter bar to axially move, the cutter bar gear assembly is arranged in the base, and the input end of the cutter bar gear assembly is connected with the first input part. The first input part is fixed in the base and is suitable for being externally connected with a driving device; the ultrasonic knife device is beneficial to operation, tissue damage can be reduced, and operation time can be shortened.

Description

TECHNICAL FIELD

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

[0002] The ultrasonic knife, also called ultrasonic cutting hemostatic knife, works by converting electric energy into high-frequency mechanical energy through piezoelectric ceramics in the transducer, and the high-frequency mechanical vibration of the knife rod 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 knife rod of the ultrasonic knife is fixed relative to the overall instrument, which limits its flexibility to some extent and 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 telescopic knife rod, comprising a base, an instrument rod, an inner rod, a knife head, a knife rod, a knife head transmission mechanism, and a knife rod transmission 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 movably arranged in the inner rod; 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, and the knife rod transmission mechanism is used to drive the knife rod to axially extend and retract; the knife rod transmission mechanism comprises a knife rod gear assembly and a knife rod lead screw, the knife rod lead screw is fixedly connected to the knife rod, the knife rod gear assembly can drive the knife rod lead screw to move axially, the knife rod lead screw moves axially to drive the knife rod to move axially, the knife rod gear assembly is arranged in the base, and an input end of the knife rod gear assembly is connected to a first input part, the first input part is fixed in the base and is adapted to be externally connected to a driving device.

[0006] Further, the knife head transmission mechanism comprises a knife head gear assembly and a knife head lead screw, the knife head gear assembly can drive the knife head lead screw to move axially, the knife head gear assembly is arranged in the base, and an input end of the knife head gear assembly is connected to a second input part, the second input part is fixed in the base and is adapted to be externally connected to a driving device; the knife head gear assembly comprises a knife head driving gear and a knife head driven gear meshing with the knife head driving gear, the knife head driving gear is connected to the second input part, an internally threaded hole is arranged in the middle of the knife head driven gear, and the threads of the internally threaded hole are matched with the knife head lead screw.

[0007] Further, the tool head screw rod top end is sleeved into one end of the inner rod for fixation, the axial movement of the tool head screw rod drives the axial up and down movement of the inner rod, two tool head rotation shafts are arranged on the tool head, and the two tool head rotation shafts are respectively sleeved into two round holes arranged on the other end of the inner rod in correspondence; a rotation pin is further arranged, the rotation pin passes through two rotation pin holes arranged on the periphery of one end of the instrument rod and a tool head through hole arranged on the tool head in correspondence, and the tool head can rotate around the rotation pin.

[0008] Further, the tool rod gear assembly comprises a tool rod driving gear, a tool rod intermediate gear and a tool rod driven gear, the tool rod driving gear is engaged with the tool rod intermediate gear, the tool rod intermediate gear is engaged with the tool rod driven gear, and the tool rod driving gear is installed in cooperation with the first input part; the tool rod driven gear is provided with an internal threaded hole, the thread of the internal threaded hole is matched with the tool rod screw rod, the rotation of the tool rod driving gear drives the rotation of the tool rod intermediate gear, the rotation of the tool rod intermediate gear drives the rotation of the tool rod driven gear, the rotation of the tool rod driven gear drives the axial movement of the tool rod screw rod through the thread, and the axial movement of the tool rod screw rod synchronously drives the axial extension and retraction of the tool rod.

[0009] Further, the ultrasonic knife device further comprises a rotation assembly, and the rotation assembly can drive the rotation of the instrument rod, the inner rod and the tool rod.

[0010] Further, the rotation assembly comprises a rotation driving gear and a rotation driven gear engaged with the rotation driving gear, the rotation driven gear is a hollow structure, one end of the instrument rod is inserted into the hollow structure of the rotation driven gear, the rotation driven gear is provided with two rotation driven gear holes arranged in correspondence along the periphery, the instrument rod is provided with two instrument rod holes arranged in correspondence along the periphery, the inner rod and the tool rod are respectively provided with an inner rod waist hole and a tool rod waist hole at the corresponding positions, and a connecting pin passes through the two rotation driven gear holes, the two instrument rod holes, the inner rod waist hole and the tool rod waist hole.

[0011] Further, the rotation driving gear is installed in cooperation with the third input part, the third input part is fixed in the base 10 and is adapted to be externally connected to a driving device.

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

[0013] Further, a middle layer support is arranged in the base, the base and the middle layer support are both provided with a tool head chuck bearing, and the tool head chuck is fixed by passing through the bearing.

[0014] Further, the tool rod driving gear passes through the base and the middle layer support and is limited by a first stop ring, and the tool head chuck passes through the base and the middle layer support and is limited by a second stop ring.

[0015] The knife rod of the ultrasonic knife device can be telescopic, only used as a cutting knife when the knife rod is extended, and used as a grabbing forceps and a cutting knife when the knife rod is retracted.

[0016] After adopting the design, the ultrasonic knife device has at least the following advantages:

[0017] 1. The knife rod of the ultrasonic knife device can be telescopic, has better flexibility, is beneficial to the operation of the surgery, reduces tissue damage, and shortens the surgery time.

[0018] 2. The ultrasonic knife part of the ultrasonic knife device can be rotated as a whole, which is beneficial to the operation of the surgery.

[0019] 3. The knife head transmission mechanism, the knife rod transmission mechanism and the rotating assembly can be operated independently and do not affect each other.

[0020] 4. The ultrasonic knife device has simple structure, good effect, low cost and easy process implementation. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above is only a summary of the technical scheme of the utility model, in order to make the technical means of the utility model more clearly understood, the utility model will be further described in detail in combination with the drawings and specific embodiments.

[0022] Figure 1 It is a whole structure schematic view of the ultrasonic knife device of the utility model;

[0023] Figure 2 It is a knife head end sectional view schematic view of the ultrasonic knife device of the utility model;

[0024] Figure 3 It is a knife head and knife head rotating shaft cooperation schematic view of the ultrasonic knife device of the utility model;

[0025] Figure 4 It is a base internal structure schematic view of the ultrasonic knife device of the utility model

[0026] Figure 5 It is a base sectional view schematic view of the ultrasonic knife device of the utility model;

[0027] Figure 6 It is a connecting pin and rotating passive gear, instrument rod, inner rod, knife rod cooperation structure schematic view of the ultrasonic knife device of the utility model;

[0028] Figure 7 It is a rotating driving gear structure schematic view of the ultrasonic knife device of the utility model;

[0029] Figure 8The utility model discloses an ultrasonic knife device rod telescopic state schematic diagram.

[0030] Figure 9 The utility model discloses an ultrasonic knife device rod telescopic state schematic diagram.

[0031] Fig. 10 is a base, 11 is a middle layer support, 20 is an instrument rod, 21 is an inner rod, 211 is an inner rod waist type hole, 311 is a tool bit driving gear, 312 is a tool bit driven gear, 32 is a tool bit screw rod, 33 is a tool bit chuck, 411 is a knife rod driving gear, 412 is a knife rod intermediate gear, 413 is a knife rod driven gear, 42 is a knife rod screw rod, 43 is a knife rod chuck, 44 is a screw rod fixed pin, 45 is a first blocking ring, 46 is a second blocking ring, 50 is a tool bit, 51 is a tool bit rotating shaft, 52 is a rotating pin, 60 is a knife rod, 601 is a knife rod waist type hole, 71 is a rotating driving gear, 72 is a rotating driven gear, 73 is a rotating chuck, 74 is a connecting pin. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be apparently 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.

[0033] In this article, "up", "down" and the like are only used to represent the relative positional relationship between the relevant parts, and do not limit the absolute position of the relevant parts.

[0034] Referring to the drawings Figures 1-9 A knife rod telescopic ultrasonic knife device, including: base 10, instrument rod 20, inner rod 21, tool bit 50, knife rod 60, tool bit transmission mechanism, knife rod transmission mechanism, instrument rod 20 is hollow structure, and one end of the instrument rod is located in the base 10, and the inner rod 21 is movably arranged in the instrument rod 20, and the inner rod 21 is hollow structure, and the knife rod 60 is movably arranged in the inner rod 21, the tool bit transmission mechanism is connected with the inner rod 21 and can drive the tool bit 50 to open and close through the inner rod 21, and the knife rod transmission mechanism is used for driving the axial telescopic of the knife rod 60, the knife rod transmission mechanism includes knife rod gear assembly and knife rod screw rod 42, the knife rod screw rod 42 is fixedly connected with the knife rod 60, the knife rod gear assembly can drive the axial motion of the knife rod screw rod 42, the axial motion of the knife rod screw rod 42 drives the axial motion of the knife rod 60, the knife rod gear assembly is arranged in the base 10, and the input end of the knife rod gear assembly is connected with the first input part, and the first input part is fixed in the base 10 and is suitable for external driving device.

[0035] The tool head transmission mechanism comprises a tool head gear assembly and a tool head screw rod 32, the tool head gear assembly can drive the tool head screw rod 32 to move axially, the tool head gear assembly is arranged in the base 10, and an input end of the tool head gear assembly is connected with the second input part, the second input part is fixed in the base 10 and is adapted to be externally connected with a driving device.

[0036] The tool head gear assembly comprises a plurality of gears, preferably, the tool head gear assembly comprises a tool head driving gear 311 and a tool head driven gear 312 engaged with the tool head driving gear 311, the tool head driving gear 311 is connected with the second input part, and the tool head driven gear 312 is provided with an internally threaded hole in the middle, the thread of the internally threaded hole is matched with the tool head screw rod 32; wherein the second input part is a tool head chuck 33, the tool head chuck 33 is matched and installed with the tool head driving gear 311, the tool head chuck 33 can be externally connected with a surgical robot, the surgical robot can drive the tool head chuck 33 to rotate, the tool head chuck 33 drives the tool head driving gear 311 to rotate synchronously, the tool head driving gear 311 drives the tool head driven gear 312 to rotate, and the tool head driven gear 312 drives the tool head screw rod 32 to move axially through the thread. The tool head screw rod 32 is sleeved into one end of the inner rod 21 and is fixed, preferably, the fixing mode is welding, and the tool head screw rod 32 drives the inner rod 21 to move axially up and down when the tool head screw rod 32 moves axially. The tool head 50 is provided with two tool head rotating shafts 51, the two tool head rotating shafts 51 are respectively sleeved into two circular holes 211 arranged on the other end of the inner rod 21 in correspondence with the circumferences, in addition, a rotating pin 52 is arranged, the rotating pin 52 passes through two rotating pin holes arranged on the circumference of one end of the instrument rod 20 and a tool head through hole arranged on the tool head 50 in correspondence, and the tool head 50 can rotate around the rotating pin 52. When the inner rod 21 moves axially, the tool head 50 is driven to rotate around the rotating pin 52 through the tool head rotating shaft 51, so that the closing and opening of the tool head 50 are realized.

[0037] The tool bar gear assembly comprises a plurality of gears, preferably, the tool bar gear assembly 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 provided with an internally threaded hole in the middle, and the thread of the internally threaded hole is matched with the tool bar lead screw 42; 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 lead screw 42 to move axially through the thread. The tool bar lead screw 42 and the tool bar 60 are connected through the screw rod fixing pin 44, when the tool bar lead screw 42 moves axially, the tool bar 60 is synchronously driven to axially extend and retract. The tool bar in the unextended state is shown in Figure 8 , and the tool bar in the extended state is shown in Figure 9 . When the tool bar is extended, the tool bar is only used as a cutting knife, and when the tool bar is retracted, the tool bar can be used as a grabbing clamp and a cutting knife. When the tool bar is extended, the tool bar extends forward by a distance, so that in a narrow operation space, the tool head is away from the tissue, and the tool head does not occupy the visual field space, and the high-frequency mechanical vibration of the tool bar is used to cut the tissue, which can reduce the tissue damage and shorten the operation time. When the tool bar is retracted, the tool bar cooperates with the tool head to grab and pull the tissue.

[0038] Further, 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, the screw rod fixing pin 44 is provided with a screw rod fixing pin rubber sleeve, and the tool bar lead screw 42, the tool bar rubber sleeve and the tool bar are connected and fixed through the screw rod fixing pin 44, so that when the tool bar driving gear 411 rotates, the tool bar 60 can be driven to axially extend and retract. The setting of the rubber sleeve can effectively eliminate the damage of the device caused by the rigid collision between the components.

[0039] The ultrasonic knife device further comprises a rotating assembly which can rotate the instrument rod 20, the inner rod 21 and the knife rod 60. 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 two rotating driven gear holes arranged opposite along the circumference, the instrument rod 20 is provided with two instrument rod holes arranged opposite along the circumference, the inner rod 21 and the knife rod 60 are respectively provided with an inner rod waist hole 211 and a knife rod waist hole 601 at the corresponding positions, a connecting pin 74 penetrates through the two rotating driven gear holes, the two instrument rod holes, the inner rod waist hole 211 and the knife rod waist hole 601, the sizes of the inner rod waist hole 211 and the knife rod waist hole 601 are set to be not affected by the connecting pin when the inner rod 21 and the knife rod 60 move axially. The rotating driving gear 71 is matched 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, the rotating driven gear 72 drives the instrument rod 20, the inner rod 21 and the knife rod 60 to rotate together. Due to the settings of the inner rod waist hole 211 and the knife rod waist hole 601, the connecting pin 74 does not limit the axial movement of the knife rod and the inner rod, and the axial movement of the knife rod and the inner rod is not affected by the connecting pin 74.

[0040] The base 10 and the middle layer support 11 are both provided with a knife head chuck bearing, and the knife head chuck 33 is fixed by penetrating through the bearings on the base and the support. A second retaining ring 46 for limiting the axial movement of the knife head chuck 33 can be sleeved on the knife head chuck 33, and the second retaining ring 46 is arranged on the middle layer support 11. The knife head chuck 33 can be prevented from being offset and dislocated under the vibration of the driving device such as a motor, the stability of the assembly of the knife head chuck 33 is effectively improved, and the stability of the use of the ultrasonic knife is ensured; in addition, one bearing or two bearings are arranged on the rotating driven gear, the knife head driven gear and the knife rod driven gear, and the arrangement of the bearings can improve the smoothness of rotation.

[0041] 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.

[0042] It should be understood that the present application is not limited to the precise construction which has been described above and illustrated in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the present application. The scope of the present application is limited only by the appended claims.

Claims

1. An ultrasonic scalpel device with a retractable blade, 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, a knife rod transmission 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, the knife rod is movably arranged in the inner rod; the knife head transmission mechanism is connected with the inner rod and can drive the knife head to open and close through the inner rod, the knife rod transmission mechanism is used for driving the knife rod to axially stretch and retract; the knife rod transmission mechanism comprises a knife rod gear assembly and a knife rod screw rod, the knife rod screw rod is fixedly connected with the knife rod, the knife rod gear assembly can drive the knife rod screw rod to axially move, the knife rod screw rod axially moving drives the knife rod to axially move, the knife rod gear assembly is arranged in the base, and an input end of the knife rod gear assembly is connected with a first input part; the first input part is fixed in the base and is suitable for being externally connected with a driving device.

2. The ultrasonic shears assembly of claim 1, wherein the shears assembly is configured to be retracted into the handle assembly. the knife head transmission mechanism comprises a knife head gear assembly and a knife head screw rod, the knife head gear assembly can drive the knife head screw rod to axially move, the knife head gear assembly is arranged in the base, and an input end of the knife head gear assembly is connected with a second input part; the second input part is fixed in the base and is suitable for being externally connected with a driving device; the knife head gear assembly comprises a knife head driving gear and a knife head driven gear meshing with the knife head driving gear, the knife head driving gear is connected with the second input part, and an inner threaded hole is arranged in the middle of the knife head driven gear; the thread of the inner threaded hole is matched with the knife head screw rod.

3. The ultrasonic shears device of claim 2, wherein the shears device is configured to be retracted into the shears shaft when the shears shaft is retracted into the handle. the top end of the knife head screw rod is sleeved into one end of the inner rod and is fixed, the knife head screw rod axially moving drives the inner rod to axially move up and down, two knife head rotating shafts are arranged on the knife head, and the two knife head rotating shafts are respectively arranged in two round holes arranged on the other end of the inner rod in a corresponding mode; a rotating pin is further arranged, the rotating pin passes through a rotating pin hole arranged on the periphery of one end of the instrument rod and a knife head through hole arranged on the knife head in a corresponding mode, and the knife head can rotate around the rotating pin.

4. The ultrasonic shears assembly of claim 1, wherein the shears assembly is configured to be retracted into the handle assembly by the extension of the knife bar. the knife rod gear assembly comprises a knife rod driving gear, a knife rod intermediate gear and a knife rod driven gear, the knife rod driving gear is meshed with the knife rod intermediate gear, the knife rod intermediate gear is meshed with the knife rod driven gear, and the knife rod driving gear is matched and installed with the first input part; an inner threaded hole is arranged in the middle of the knife rod driven gear, the thread of the inner threaded hole is matched with the knife rod screw rod; the knife rod driving gear rotates to drive the knife rod intermediate gear to rotate, the knife rod intermediate gear rotates to drive the knife rod driven gear to rotate, the knife rod driven gear rotates to drive the knife rod screw rod to axially move through the thread, and when the knife rod screw rod axially moves, the knife rod axially stretches and retracts synchronously.

5. The ultrasonic scalpel device of claim 2 or 3, wherein the knife bar is retractable. the ultrasonic knife device further comprises a rotating assembly, and the rotating assembly can drive the instrument rod, the inner rod and the knife rod to rotate.

6. The ultrasonic shears assembly of claim 5, wherein the shears assembly is configured to be retracted into the handle assembly by the extension of the knife bar. the rotating assembly comprises a rotating driving gear and a rotating driven gear meshing with the rotating driving gear, 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 two rotating driven gear holes arranged in a corresponding mode along the periphery, the instrument rod is provided with two instrument rod holes arranged in a corresponding mode along the periphery, the inner rod and the knife rod are respectively provided with an inner rod waist hole and a knife rod waist hole at corresponding positions, and a connecting pin penetrates through the two rotating driven gear holes, the two instrument rod holes, the inner rod waist hole and the knife rod waist hole.

7. The ultrasonic scalpel device of claim 6, wherein the knife bar is retractable. the rotating driving gear is matched and installed with a third input part, the third input part is fixed in the base and is suitable for being externally connected with a driving device.

8. The ultrasonic scalpel device of claim 7, wherein the knife bar is retractable. The first input part is a tool bar chuck, the second input part is a tool head chuck, and the third input part is a rotating chuck.

9. The ultrasonic shears device of claim 8, wherein the shears are retractable. The base is internally provided with a middle layer support, and the base and the middle layer support are internally provided with tool head chuck bearings.

10. The ultrasonic shears assembly of claim 9, wherein the shears assembly is configured to be retracted into the handle assembly by the extension of the knife bar. The tool bar driving gear passes through the base and the middle layer support and is limited by a first stop ring, and the tool head chuck is sleeved with a second stop ring for limiting axial movement of the tool head chuck, and the second stop ring is arranged on the middle layer support.

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