Tip angle-adjustable ultrasonic power tool bit for nasal skull base endoscope

Abstract

The invention relates to a tip angle-adjustable ultrasonic power tool bit for a nasal skull base endoscope. The problems that in the prior art, an ultrasonic knife is insufficient in functionality and poor in stability, and flexible functional adjustment is difficult to conduct are solved, and the ultrasonic knife can meet the requirement for operation in a narrow space under an endoscope. The ultrasonic scalpel comprises an assembling handle, one end of the assembling handle is provided with an elastic pressing handle, the other end of the assembling handle is connected with an assembling scalpel cylinder, one end of the assembling scalpel cylinder is provided with an ultrasonic scalpel head, the ultrasonic scalpel head is connected with a transducer arranged in the assembling handle, and a double-gear linkage control structure is arranged in the assembling scalpel cylinder. One end of the double-gear linkage control structure is in linkage with the elastic pressing handle, the other end of the double-gear linkage control structure is connected with a movable cutter head structure, and a rotary adjusting assembly used for adjusting the telescopic length of the assembling cutter cylinder so as to control the exposed length of the ultrasonic cutter head and the movable cutter head structure is arranged between the assembling handle and the assembling cutter cylinder. The multifunctional surgical instrument has the advantages that the multifunctional surgical instrument can adapt to diversified surgical scenes and is rich in function, good in adjusting flexibility and good in using effect.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to an ultrasonic power knife head with adjustable tip angle for nasal skull base endoscope. Background Art

[0002] Endoscopic transnasal surgery has become the most commonly used surgical method for midline and lateral skull base masses due to its minimally invasive, adequate exposure, and rapid postoperative recovery. With the continuous expansion of the scope of surgery and indications, the scope of skull base removal has also increased accordingly, and the difficulty of skull base reconstruction has also increased. Severe postoperative cerebrospinal fluid leakage may lead to fatal intracranial infection. Therefore, reliable skull base reconstruction after neuroendoscopic surgery is the basic condition for the success of the operation. There is currently no unified standard for skull base reconstruction methods, and there is no corresponding reconstruction technology for the reconstruction of different types of skull base defects, but multi-layer repair is a principle that is unanimously recognized. Skull base reconstruction follows the 3N principle and personalized repair to select repair materials and methods. While emphasizing multiple repairs, the concept of restoring the normal physiological and anatomical reduction of the skull base cannot be ignored. Therefore, in situ autologous bone flap repair can provide rigid reconstruction and has a good repair effect. During the implementation of endoscopic transnasal surgery, a lot of bone loss is caused during the operation of the drill and milling cutter, resulting in larger bone gaps after the bone flap is repositioned, affecting bone healing and making it difficult to achieve rigid reconstruction of the autologous bone flap. On the other hand, huge heat is generated during the grinding process, which may cause burns to blood vessels and nerves, affecting the surgical effect. In addition, the existing ultrasonic scalpels are insufficient in functionality and poor in stability, making it difficult to perform flexible functional adjustments and unable to adapt to the surgical field of minimally invasive endoscopic surgery.

[0003] In order to solve the deficiencies of the prior art, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses an ultrasonic scalpel head [CN202020585540.1], which includes a connecting portion, a transition portion, and a cutting portion, wherein the connecting portion and the transition portion are both cylindrical, and the cutting portion is a thin sheet whose thickness gradually decreases from its tail end to its front end, and a group of saw teeth are arranged on the outer peripheral side of the cutting portion, and the thickness of the saw teeth gradually decreases along the extension direction thereof, and the first angle α formed between the first side of the saw teeth and the axis of the cutting portion is greater than the second angle β formed between the second side of the saw teeth and the axis of the cutting portion, so that the saw teeth extend obliquely.

[0004] The above solution has solved the problem of easy damage caused by ultrasonic scalpels in the prior art to a certain extent, but the solution still has many shortcomings, such as: insufficient functionality, poor stability, difficulty in flexible functional adjustment, and inability to adapt to the surgical field of minimally invasive endoscopic surgery. Summary of the invention

[0005] The purpose of the present invention is to provide an ultrasonic powered knife head with adjustable tip angle for nasal skull base endoscopy in view of the above problems.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: an ultrasonic power knife head with an adjustable tip angle for a nasal skull base endoscope, comprising an assembly handle, an elastic pressing handle is provided at one end of the assembly handle and an assembly knife barrel is connected to the other end, an ultrasonic knife head is provided at one end of the assembly knife barrel, and the ultrasonic knife head is connected to a transducer arranged in the assembly handle, and the transducer is connected to a host to obtain power, a double-gear linkage control structure is provided in the assembly knife barrel, and one end of the double-gear linkage control structure is linked to the elastic pressing handle and the other end is connected to a movable knife head structure arranged corresponding to the ultrasonic knife head, a rotating adjustment component is provided between the assembly handle and the assembly knife barrel for adjusting the telescopic length of the assembly knife barrel to control the exposed length of the ultrasonic knife head and the movable knife head structure, and the diameter specification of the assembly knife barrel can be set to 3MM.

[0007] In the above-mentioned ultrasonic power knife head with adjustable tip angle for nasal skull base endoscopy, a lighting lamp group arranged in a ring shape is provided at the front end of the assembly knife barrel, and an annular suction layer is provided on the circumferential outer side of the lighting lamp group, and a plurality of suction tubes are distributed circumferentially on the annular suction layer. The lighting lamp group and the suction tube are controlled by the main machine, and switch push buttons for opening and closing the lighting lamp group and the suction tube are respectively provided on the assembly handle.

[0008] In the above-mentioned ultrasonic powered blade with adjustable tip angle for nasal skull base endoscopy, a strip-shaped clearance gap is provided at the front end of the assembled blade barrel for the ultrasonic blade to pass through, and a rotating movable limiting slot hole is provided on the lower side of the strip-shaped clearance gap for limiting the movable blade head structure, and an elastic extrusion buffer area is provided between the rotating movable slot hole and the strip-shaped clearance gap.

[0009] In the above-mentioned ultrasonic power knife head with adjustable tip angle for nasal skull base endoscopy, the double-gear linkage control structure includes a linkage cross bar arranged in the assembly handle, a linkage gear is provided in the middle of the linkage cross bar, and the linkage cross bar is connected to the elastic pressing handle through a linkage seat, a rear linkage rod is provided at the front end of the linkage cross bar, and linkage rear gears are respectively provided at both ends of the rear linkage rod, and synchronous gears meshing with the linkage gears are provided between the linkage rear gears, and the linkage rear gears are connected to the linkage front gear located at the end of the assembly knife barrel away from the assembly handle through a synchronous chain belt, and the linkage front gears are connected by rotating the front linkage rod installed on the inner side of the assembly knife barrel.

[0010] In the above-mentioned ultrasonic power knife head with adjustable tip angle for nasal skull base endoscopy, the movable knife head structure includes a plug-in knife seat connected to the front linkage rod, and a plug-in cylinder is provided at the end of the plug-in knife seat away from the front linkage rod, and a plurality of positioning grooves are circumferentially provided on the plug-in cylinder. The movable knife head is detachably connected to the plug-in cylinder, and a plurality of positioning protrusions corresponding to the positioning grooves are circumferentially provided at one end of the movable knife head, a pressure spring is provided at the bottom of the positioning protrusion, and the end of the pressure spring away from the positioning protrusion acts on the positioning chamber of the movable knife head.

[0011] In the above-mentioned ultrasonic power knife head with adjustable tip angle for nasal skull base endoscopy, one end of the movable knife head has a rotation adjustment part, an elastic connecting part is provided between the rotation adjustment part and the movable knife head, and an elastic reset part arranged in an arc shape is provided between the rotation adjustment part and the circumferential inner side of the movable knife head, and the rotation adjustment part is connected to the tensioning adjustment knob arranged on the elastic pressing handle through a steel wire.

[0012] In the above-mentioned ultrasonic power knife head with adjustable tip angle for nasal skull base endoscopy, the outer wall of the elastic pressing handle is provided with a transparent connecting cover plate which is rotated and positioned with the linkage cross bar, the transparent connecting cover plate is provided with an annular sensing part on the circumferential outer side, a plurality of sensing modules are provided on the circumference of the annular sensing part, and a plurality of clamping force display light groups corresponding to the sensing modules are provided on the circumference of the annular sensing part, the end of the linkage cross bar is provided with a linkage sensing part which can rotate synchronously with the linkage cross bar and is arranged corresponding to the sensing module, and the sensing module and the sensing light group are connected to the main machine.

[0013] In the above-mentioned ultrasonic power knife head with adjustable tip angle for nasal skull base endoscope, a clamping shaft that acts on the circumferential outer upper end surface of the synchronous chain belt is radially rotatable on the assembly knife cylinder, and a tensioning shaft that acts on the circumferential inner lower end surface of the synchronous chain belt is radially rotatable on the assembly knife cylinder, and a strip adjustment groove for lifting and lowering adjustment of the clamping shaft and the tensioning shaft is provided on the assembly knife cylinder; the assembly knife cylinder has a positioning end and a bending end, a flexible bending portion is provided between the bending end and the positioning end, and a bending linkage rod that acts on the bending portion is provided in the assembly knife cylinder, and the bending linkage rod extends from one end of the bending portion to the inner cavity of the assembly handle and is linked and positioned by a bending adjustment gear arranged on the outer wall of the assembly handle.

[0014] In the above-mentioned ultrasonic power knife head with adjustable tip angle for nasal skull base endoscopy, the rotary adjustment component includes a connecting sleeve arranged at the front end of the assembly handle, a threaded connecting tube is provided at one end of the connecting sleeve, and a rotary adjustment knob is threadedly connected to one end of the threaded connecting tube, a plug-in connection channel is provided on the axial inner side of the rotary adjustment knob, and the assembly knife cylinder is connected in the plug-in connection channel and is synchronously linked with the rotary adjustment knob.

[0015] In the above-mentioned ultrasonic power knife head with adjustable tip angle for nasal skull base endoscopy, one end of the assembled knife barrel arranged in the plug-in connection channel is a wide diameter end and the other end is a thin diameter end, and a limit adjustment seat is circumferentially provided at the thin diameter end. A limit rubber is provided at one end of the limit adjustment seat close to the rotation adjustment knob, and a rotation adjustment gap is formed between the limit rubber and the rotation adjustment knob.

[0016] Compared with the existing technology, the advantages of the present invention are: high adjustability, and the ability to adjust the assembled knife barrel to extend and retract according to actual needs during the operation to control the exposed length of the ultrasonic knife head and the movable knife head structure, and reduce the contact area with the wound; secondly, the double-gear linkage control structure can effectively ensure the linkage effect of the movable knife head structure, and even if one of the synchronous chain belts is broken, the drive adjustment can still be achieved, and the rotating adjustment part at the end of the movable knife head structure can be bent and adjusted through the steel wire, and the bending angle of the bending end can be adjusted, which can adapt to a variety of surgical scenarios, has rich functions, good adjustment flexibility, and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the end surface structure of the assembled knife barrel in the present invention;

[0019] Figure 3 It is a schematic diagram of the double gear linkage control structure in the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the movable cutter head in the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the rotating adjustment part after bending in the present invention;

[0022] Figure 6 It is a schematic diagram of the internal structure of the transparent connecting cover plate in the present invention;

[0023] Figure 7 It is a schematic diagram of the structure of the rotary adjustment component in the present invention;

[0024] In the figure: assembly handle 1, elastic pressing handle 11, assembly knife barrel 12, lighting lamp group 121, annular suction layer 122, suction tube 123, switch push button 124, strip-shaped clearance gap 125, rotational movable limit slot 126, elastic extrusion buffer area 127, positioning end 128, bending end 129, ultrasonic knife head 13, double gear linkage control structure 2, linkage cross bar 21, linkage gear 22, linkage seat 23, rear linkage rod 24, linkage rear gear 25, synchronous gear 26, synchronous chain belt 27, clamping shaft 271, tensioning shaft 272, strip-shaped adjustment groove 273, linkage front gear 28, front linkage rod 29, movable knife head structure 3, plug-in The tool holder 31, the plug-in cylinder 32, the positioning groove 33, the movable tool head 34, the rotation adjustment part 341, the elastic connecting part 342, the elastic reset part 343, the steel wire 344, the tension adjustment knob 345, the positioning protrusion 35, the top pressure spring 36, the positioning bin 37, the rotation adjustment component 4, the connecting sleeve 41, the threaded connecting cylinder 42, the rotation adjustment knob 43, the plug-in connecting channel 44, the limit adjustment seat 45, the limit rubber 46, the rotation adjustment gap 47, the transparent connecting cover 5, the annular sensing part 51, the sensing module 52, the clamping force display light group 53, the linkage sensing part 54, the flexible bending part 6, the bending linkage rod 61, and the bending adjustment gear 62. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1-7 As shown, an ultrasonic powered blade with adjustable tip angle for nasal skull base endoscope comprises an assembly handle 1, one end of the assembly handle 1 is provided with an elastic pressing handle 11 and the other end is connected to an assembly blade barrel 12, one end of the assembly blade barrel 12 is provided with an ultrasonic blade head 13, and the ultrasonic blade head 13 is connected to a transducer arranged in the assembly handle 1, and the transducer is connected to a host to obtain power, a double-gear linkage control structure 2 is provided in the assembly blade barrel 12, and one end of the double-gear linkage control structure 2 is linked to the elastic pressing handle 11 and the other end is connected to a movable blade head structure 3 arranged corresponding to the ultrasonic blade head 13, a rotating adjustment component 4 is provided between the assembly handle 1 and the assembly blade barrel 12 for adjusting the telescopic length of the assembly blade barrel 12 to control the exposed length of the ultrasonic blade head 13 and the movable blade head structure 3, and the diameter specification of the assembly blade barrel 12 can be set to 3MM.

[0027] Among them, a lighting lamp group 121 arranged in a ring shape is provided at the front end of the assembly knife cylinder 12, and an annular suction layer 122 is provided on the circumferential outer side of the lighting lamp group 121, and a plurality of suction tubes 123 are distributed circumferentially on the annular suction layer 122. The lighting lamp group 121 and the suction tube 123 are controlled by the main machine, and switch push buttons 124 for opening and closing the lighting lamp group 121 and the suction tube 123 are respectively provided on the assembly handle 1.

[0028] The suction tube 123 is connected to an external suction device to suck excess blood from the wound and provide a visual space for surgical operations. Secondly, the lighting group 121 is used in conjunction with the endoscope to improve visibility.

[0029] It can be seen that a strip-shaped clearance gap 125 is provided at the front end of the assembly knife barrel 12 for the ultrasonic knife head 13 to pass through, a rotating movable limiting slot 126 is provided at the lower side of the strip-shaped clearance gap 125 for limiting the movable knife head structure 3, and an elastic extrusion buffer area 127 is provided between the rotating movable slot and the strip-shaped clearance gap 125.

[0030] The active area is limited, and the closing elasticity of the blade is provided by elastically squeezing the buffer area 127, so as to enhance the cutting force.

[0031] Obviously, the double-gear linkage control structure 2 includes a linkage cross bar 21 arranged in the assembly handle 1, a linkage gear 22 is provided in the middle of the linkage cross bar 21, and the linkage cross bar 21 is connected to the elastic pressing handle 11 through a linkage seat 23, a rear linkage rod 24 is provided at the front end of the linkage cross bar 21, and linkage rear gears 25 are respectively sleeved on both ends of the rear linkage rod 24, and a synchronous gear 26 meshing with the linkage gear 22 is provided between the linkage rear gears 25, and the linkage rear gear 25 is connected to a linkage front gear 28 located at the end of the assembly knife cylinder 12 away from the assembly handle 1 through a synchronous chain belt 27, and the linkage front gear 28 is connected by a front linkage rod 29 rotatably installed on the inner side of the assembly knife cylinder 12.

[0032] By pressing the elastic pressing handle 11, the linkage seat 23 drives the linkage cross bar 21 to rotate, so that the linkage gear 22 drives the synchronous gear 26 to rotate. When the synchronous gear 26 rotates, the rear linkage rod 24 drives the linkage rear gear 25 to rotate synchronously, and then drives the linkage front gear 28 to rotate through the synchronous chain belt 27, so that the front linkage rod 29 drives the movable cutter head structure 3 to swing.

[0033] Furthermore, the movable cutter head structure 3 includes a plug-in cutter seat 31 connected to the front connecting rod 29, and a plug-in cylinder 32 is provided at the end of the plug-in cutter seat 31 away from the front connecting rod 29, and a plurality of positioning grooves 33 are circumferentially provided on the plug-in cylinder 32. A movable cutter head 34 is detachably connected to the plug-in cylinder 32, and a plurality of positioning protrusions 35 corresponding to the positioning grooves 33 are circumferentially provided at one end of the movable cutter head 34, a pressure spring 36 is provided at the bottom of the positioning protrusion 35, and the end of the pressure spring 36 away from the positioning protrusion 35 acts on the positioning chamber 37 of the movable cutter head 34.

[0034] The elastic plug-in arrangement facilitates the plug-in replacement of the movable cutter head 34 , and after installation and plug-in, it has no influence on the swing of the movable cutter head 34 , and the connection is stable.

[0035] Furthermore, one end of the movable cutter head 34 has a rotation adjustment portion 341, an elastic connecting portion 342 is provided between the rotation adjustment portion 341 and the movable cutter head 34, and an arc-shaped elastic reset member 343 is provided between the rotation adjustment portion 341 and the circumferential inner side of the movable cutter head 34, and the rotation adjustment portion 341 is connected to a tensioning adjustment knob 345 provided on the elastic pressing handle 11 through a steel wire 344.

[0036] The rotating adjustment part 341 is plugged into the end of the steel wire 344 through a plug-in buckle, and an elastic telescopic part is provided between the rotating adjustment part 341 and the bottom of the movable cutter head 34 . When the movable cutter head 34 is replaced and the elastic telescopic part is removed, a hollow installation gap is formed between the rotating adjustment part 341 and the movable cutter head 34 .

[0037] Specifically, the outer wall of the elastic pressing handle 11 is provided with a transparent connecting cover plate 5 which is rotatably positioned with the linkage cross bar 21. The transparent connecting cover plate 5 is provided with an annular sensing portion 51 on the circumferential outer side. The annular sensing portion 51 is provided with a plurality of sensing modules 52 on the circumference. The annular sensing portion 51 is provided with a plurality of clamping force display light groups 53 on the circumference which are arranged corresponding to the sensing modules 52. The end of the linkage cross bar 21 is provided with a linkage sensing portion 54 which can rotate synchronously with the linkage cross bar 21 and is arranged corresponding to the sensing module 52. The sensing module 52 and the sensing light group are connected to the main machine.

[0038] When the elastic pressing handle 11 is pressed and rotated, the linkage sensing part 54 rotates synchronously, constantly changing its position to sense the corresponding sensing module 52, thereby realizing the opening and closing of the corresponding sensing light group, thereby judging the degree of engagement of the movable blade head 34 according to the opening and closing of the sensing light group.

[0039] In detail, a clamping shaft 271 is radially rotatable on the assembly knife cylinder 12 and acts on the circumferential outer upper end surface of the synchronous chain belt 27, and a tensioning shaft 272 is radially rotatable on the assembly knife cylinder 12 and acts on the circumferential inner lower end surface of the synchronous chain belt 27. The assembly knife cylinder 12 is provided with a strip adjustment groove 273 for adjusting the clamping shaft 271 and the tensioning shaft 272 to be raised and lowered; the assembly knife cylinder 12 has a positioning end 128 and a bending end 129, a flexible bending portion 6 is provided between the bending end 129 and the positioning end 128, and a bending linkage rod 61 acting on the bending portion is provided in the assembly knife cylinder 12, and the bending linkage rod 61 extends from one end of the bending portion to the inner cavity of the assembly handle 1 and is linked to the positioning through a bending adjustment gear 62 provided on the outer wall of the assembly handle 1.

[0040] The bending adjustment gear 62 can be used to pull the bending linkage rod 61 to synchronize the bending ends 129 and adjust the bending angle, thereby meeting the adjustment requirements of more angles.

[0041] More specifically, the rotary adjustment component 4 includes a connecting sleeve 41 arranged at the front end of the assembly handle 1, a threaded connecting tube 42 is provided at one end of the connecting sleeve 41, and a rotary adjustment knob 43 is threadedly connected to one end of the threaded connecting tube 42, a plug-in connection channel 44 is provided on the axial inner side of the rotary adjustment knob 43, and the assembly knife cylinder 12 is connected in the plug-in connection channel 44 and is synchronously linked with the rotary adjustment knob 43.

[0042] The assembly knife cylinder 12 can be driven to move forward or backward by turning the adjustment knob 43, thereby controlling the exposed length of the ultrasonic blade head 13 and the movable blade head 34. The ultrasonic blade head 13 and the movable blade head 34 have a loading margin in the assembly knife cylinder 12.

[0043] In addition, the assembly knife cylinder 12 is arranged in the plug-in connection channel 44 with one end having a wide diameter end and the other end having a thin diameter end, and the thin diameter end is circumferentially provided with a limit adjustment seat 45, and the limit adjustment seat 45 is provided with a limit rubber 46 at one end close to the rotation adjustment knob 43, and a rotation adjustment gap 47 is formed between the limit rubber 46 and the rotation adjustment knob 43.

[0044] To sum up, the principle of this embodiment is: when in use, the assembly knife barrel 12 is adjusted by rotating the adjustment knob 43 to control the movable length of the ultrasonic knife head 13 and the movable knife head 34, and the switch push button 124 is used to control the opening and closing of the lighting lamp group 121 and the suction tube 123 to adjust the operating field of view, and the bite force of the movable knife head 34 is controlled by the double gear linkage control structure 2. At the same time, the bending angle of the rotating adjustment part 341 is adjusted by tightening the adjustment knob 345 to achieve different cutting requirements. During use, the tightness of the synchronous chain belt 27 can be adjusted by the clamping shaft 271 and the tensioning shaft 272.

[0045] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0046] Although this article uses more assembly handles 1, elastic pressing handles 11, assembly knife barrels 12, lighting lamp groups 121, annular suction layers 122, suction tubes 123, switch push buttons 124, strip-shaped clearance gaps 125, rotational movable limit slots 126, elastic extrusion buffer areas 127, positioning ends 128, bending ends 129, ultrasonic knife heads 13, double-gear linkage control structure 2, linkage cross bars 21, linkage gears 22, linkage seats 23, rear linkage rods 24, linkage rear gears 25, synchronous gears 26, synchronous chain belts 27, clamping shafts 271, tensioning shafts 272, strip-shaped adjustment slots 273, linkage front gears 28, front linkage rods 29, movable knife head structures 3, plug-in knife seats 31, and plug-in The terms such as connecting barrel 32, positioning slot 33, movable blade 34, rotation adjustment part 341, elastic connecting part 342, elastic reset part 343, steel wire 344, tension adjustment knob 345, positioning protrusion 35, top pressure spring 36, positioning bin 37, rotation adjustment component 4, connecting sleeve 41, threaded connecting barrel 42, rotation adjustment knob 43, plug-in connection channel 44, limit adjustment seat 45, limit rubber 46, rotation adjustment gap 47, transparent connecting cover 5, annular sensing part 51, sensing module 52, clamping force display lamp group 53, linkage sensing part 54, flexible bending part 6, bending linkage rod 61, bending adjustment gear 62, etc., but the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. An ultrasonic power knife head with adjustable tip angle for nasal skull base endoscope, comprising an assembly handle (1), one end of the assembly handle (1) is provided with an elastic pressing handle (11) and the other end is connected to an assembly knife barrel (12), an ultrasonic knife head (13) is arranged in the assembly knife barrel (12), and the ultrasonic knife head (13) is connected to a transducer arranged in the assembly handle (1), and the transducer is connected to a host to obtain power, characterized in that: The assembly knife barrel (12) is provided with a double-gear linkage control structure (2), one end of the double-gear linkage control structure (2) is linked to the elastic pressing handle (11) and the other end is connected to a movable knife head structure (3) corresponding to the ultrasonic knife head (13), and a rotating adjustment component (4) is provided between the assembly handle (1) and the assembly knife barrel (12) for adjusting the telescopic length of the assembly knife barrel (12) and thereby controlling the exposed length of the ultrasonic knife head (13) and the movable knife head structure (3).

2. The ultrasonic power knife head with adjustable tip angle for nasal skull base endoscopy according to claim 1, characterized in that: The front end of the assembly knife cylinder (12) is provided with a lighting lamp group (121) arranged in an annular shape, and an annular suction layer (122) is provided on the circumferential outer side of the lighting lamp group (121), and a plurality of suction tubes (123) are distributed circumferentially on the annular suction layer (122). The lighting lamp group (121) and the suction tube (123) are controlled by a main machine, and switch buttons (124) for opening and closing the lighting lamp group (121) and the suction tube (123) are respectively provided on the assembly handle (1).

3. The ultrasonic power knife head with adjustable tip angle for nasal skull base endoscopy according to claim 2, characterized in that: The front end of the assembly knife cylinder (12) is provided with a strip-shaped clearance gap (125) for the ultrasonic knife head (13) to pass through, and the lower side of the strip-shaped clearance gap (125) is provided with a rotatable limiting slot hole (126) for limiting the movable knife head structure (3), and an elastic extrusion buffer area (127) is provided between the rotatable limiting slot hole and the strip-shaped clearance gap (125).

4. The ultrasonic power knife head with adjustable tip angle for nasal skull base endoscopy according to claim 1, characterized in that: The double-gear linkage control structure (2) comprises a linkage cross bar (21) arranged in the assembly handle (1), a linkage gear (22) is arranged in the middle of the linkage cross bar (21), and the linkage cross bar (21) is connected to the elastic pressing handle (11) through a linkage seat (23), a rear linkage rod (24) is arranged at the front end of the linkage cross bar (21), and linkage rear gears (25) are respectively sleeved at both ends of the rear linkage rod (24), a synchronous gear (26) meshing with the linkage gear (22) is arranged between the linkage rear gears (25), and the linkage rear gear (25) is connected to a linkage front gear (28) located at the end of the assembly knife cylinder (12) away from the assembly handle (1) through a synchronous chain belt (27), and the linkage front gear (28) is connected through a front linkage rod (29) rotatably installed on the inner side of the assembly knife cylinder (12).

5. The ultrasonic powered knife head with adjustable tip angle for nasal skull base endoscopy according to claim 4, characterized in that: The movable cutter head structure (3) comprises a plug-in cutter seat (31) connected to the front linkage rod (29); an inserting cylinder (32) is provided at one end of the inserting cutter seat (31) away from the front linkage rod (29); a plurality of positioning grooves (33) are circumferentially provided on the inserting cylinder (32); a movable cutter head (34) is detachably connected to the inserting cylinder (32); a plurality of positioning protrusions (35) corresponding to the positioning grooves (33) are circumferentially provided at one end of the movable cutter head (34); a pressure spring (36) is provided at the bottom of the positioning protrusion (35); and the end of the pressure spring (36) away from the positioning protrusion (35) acts on the positioning chamber (37) of the movable cutter head (34).

6. The ultrasonic power knife head with adjustable tip angle for nasal skull base endoscopy according to claim 5, characterized in that: The movable blade head (34) has a rotation adjustment portion (341) at one end, an elastic connection portion (342) is provided between the rotation adjustment portion (341) and the movable blade head (34), and an arc-shaped elastic reset member (343) is provided between the rotation adjustment portion (341) and the inner side of the movable blade head (34) in the circumferential direction, and the rotation adjustment portion (341) is connected to a tension adjustment knob (345) provided on the elastic pressing handle (11) through a steel wire (344).

7. The ultrasonic powered knife head with adjustable tip angle for nasal skull base endoscopy according to claim 4, characterized in that: The outer wall of the elastic pressing handle (11) is provided with a transparent connecting cover plate (5) which is rotatably positioned with the linkage cross bar (21); the transparent connecting cover plate (5) is provided with an annular sensing portion (51) on the circumferential outer side; the annular sensing portion (51) is provided with a plurality of sensing modules (52) on the circumferential side; and the annular sensing portion (51) is provided with a plurality of clamping force display light groups (53) which are arranged corresponding to the sensing modules (52); the end of the linkage cross bar (21) is sleeved with a linkage sensing portion (54) which can rotate synchronously with the linkage cross bar (21) and is arranged corresponding to the sensing module (52); the sensing module (52) and the sensing light group are connected to the host.

8. The ultrasonic power knife head with adjustable tip angle for nasal skull base endoscopy according to claim 7, characterized in that: The assembly knife cylinder (12) is provided with a radially rotatable clamping shaft (271) for acting on the circumferential outer upper end surface of the synchronous chain belt (27), and the assembly knife cylinder (12) is provided with a radially rotatable tensioning shaft (272) for acting on the circumferential inner lower end surface of the synchronous chain belt (27). The assembly knife cylinder (12) is provided with a strip adjustment groove (273) for adjusting the clamping shaft (271) and the tensioning shaft (272) to rise and fall; the assembly knife cylinder (12) has a positioning end (128) and a bending end (129), a flexible bending portion (6) is provided between the bending end (129) and the positioning end (128), and a bending linkage rod (61) for acting on the bending portion is provided in the assembly knife cylinder (12), and the bending linkage rod (61) extends from one end of the bending portion to the inner cavity of the assembly handle (1) and is linked to the position by a bending adjustment gear (62) provided on the outer wall of the assembly handle (1).

9. The ultrasonic powered knife head with adjustable tip angle for nasal skull base endoscopy according to claim 1, characterized in that: The rotary adjustment assembly (4) comprises a connecting sleeve (41) arranged at the front end of the assembly handle (1); a threaded connection tube (42) is provided at one end of the connecting sleeve (41); and a rotary adjustment knob (43) is threadedly connected to one end of the threaded connection tube (42); a plug-in connection channel (44) is provided on the axial inner side of the rotary adjustment knob (43); and the assembly knife cylinder (12) is connected in the plug-in connection channel (44) and is synchronously linked with the rotary adjustment knob (43).

10. The ultrasonic powered knife head with adjustable tip angle for nasal skull base endoscopy according to claim 9, characterized in that: The assembly knife cylinder (12) is arranged in the plug-in connection channel (44) with one end having a wide diameter and the other end having a thin diameter. The thin diameter end is circumferentially provided with a limit adjustment seat (45). The limit adjustment seat (45) is provided with a limit rubber (46) at one end close to the rotation adjustment knob (43), and a rotation adjustment gap (47) is formed between the limit rubber (46) and the rotation adjustment knob (43).

Images