Multi-degree-of-freedom flexible arthroscope bite forceps

Abstract

The invention relates to the technical field of medical apparatus and instruments, and discloses a multi-degree-of-freedom flexible arthroscope bite forceps which comprise a bite forceps assembly, the bite forceps assembly comprises two bite head bodies, one end of each bite head body is integrally connected with a hinge joint, the interior of each hinge joint is rotatably connected with a first pin shaft, and the outer surface of each first pin shaft is sleeved with a torsional spring; connecting plates are rotationally connected to the two ends of the first pin shaft, a second pin shaft is rotationally connected between the two connecting plates, and a U-shaped plate is rotationally connected to the outer surface of the second pin shaft. By means of the handle control assembly, through cooperation of the finger ring, the L-shaped rod and the traction line, opening and closing of the biting head body can be easily controlled, diseased tissue is bitten, meanwhile, the angle of the connecting plate and the angle of the U-shaped plate can be adjusted by rotating the first rotary knob and the second rotary knob, the biting forceps can flexibly change the posture and accurately reach the complex position in the joint, and the working efficiency is improved. Regions, such as the deep edge of the meniscus of the knee joint, which are difficult to touch by traditional bite forceps, are effectively prevented from damaging surrounding normal tissues, and the operation difficulty is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a multi-degree-of-freedom flexible arthroscopic forceps. Background Art

[0002] In the field of modern medicine, the diagnosis and treatment of joint diseases have always been important research directions. As a minimally invasive treatment method, arthroscopic surgery has been widely used in the treatment of joint diseases due to its advantages such as small trauma and quick recovery. As one of the key instruments in arthroscopic surgery, the arthroscopic forceps is used to bite and remove pathological tissues, foreign bodies, etc. inside the joint, and its performance directly affects the surgical effect.

[0003] Traditional arthroscopic forceps are usually of rigid structure, with limited degrees of freedom and poor operation flexibility. In complex joint structures such as the knee joint and shoulder joint, due to the complex anatomical structure and narrow space inside the joint, it is difficult for traditional rigid forceps to reach some special positions and accurately bite and remove pathological tissues. For example, in the repair surgery of meniscus injury in the knee joint, the edge part of the meniscus is often deep in the joint space, and it is difficult for traditional forceps to accurately reach and deal with the damaged part, which easily leads to limited surgical vision, increased surgical difficulty, and prolonged surgical time. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a multi-degree-of-freedom flexible arthroscopic forceps, which can flexibly adjust the angular position of the bite head body, accurately reach complex positions inside the joint, such as the deep part of the edge of the knee meniscus that is difficult to reach by traditional forceps, effectively avoiding damage to surrounding normal tissues and solving the above technical problems.

[0005] To achieve the above object, the present invention provides the following technical solution: A multi-degree-of-freedom flexible arthroscopic forceps, including a forceps assembly, which includes two bite head bodies. One end of each of the two bite head bodies is integrally connected with a hinge joint. A pin shaft one is rotatably connected inside the hinge joint. A torsion spring is sleeved on the outer surface of the pin shaft one. Both ends of the pin shaft one are rotatably connected with connecting plates. A pin shaft two is rotatably connected between the two connecting plates. A U-shaped plate is rotatably connected to the outer surface of the pin shaft two. A pin shaft three is rotatably connected inside the U-shaped plate. A tail end connecting block is rotatably connected to the outer surface of the pin shaft three. The handle control assembly includes a housing. The lower surface of the housing is fixedly connected to a handle body. And inside the housing, a sleeve is fixedly connected. A collar is rotatably connected to the outer surface of the sleeve. A ring groove is formed on the outer surface of the collar. And an L-shaped rod is fixedly connected to the outer surface of the collar. The bottom end of the L-shaped rod is fixedly connected to a finger ring. And a thin rope rod is fixedly connected to the outer surface of the L-shaped rod. A first traction line is tied to the outer surface of the thin rope rod. A first roller and a second roller are rotatably connected inside the sleeve. The outer surface of the first roller is in sliding contact with a second traction line. The outer surface of the second roller is in sliding contact with a third traction line; A rigid hollow rod, one end of the rigid hollow rod is connected to a biting forceps assembly, and the other end of the rigid hollow rod is detachably connected to the handle control assembly.

[0006] Preferably, a J-shaped groove one is formed on the end face of the hinge joint around the axis of the first pin shaft. The front end of the J-shaped groove one inserts the first traction line.

[0007] Preferably, a circular groove is formed on the other end face of the hinge joint. The circular groove is used to accommodate a torsion spring. The two ends of the torsion spring are bent by 90 degrees. And the two ends of the torsion spring are respectively inserted into the interiors of the two hinge joints.

[0008] Preferably, an arc-shaped groove through which the two L-shaped rods can pass is formed on the outer wall of the housing. There are two first traction lines. There is one second traction line and one third traction line. And one ends of the two first traction lines are both fixedly connected to thin rope rods. The bottom end of one thin rope rod is fixedly connected to one L-shaped rod. The top end of the other thin rope rod is fixedly connected to the other L-shaped rod.

[0009] Preferably, a wire groove is formed in the interior of the connecting plate around the axis of the second pin shaft. The second traction line is inserted into the wire groove. Two J-shaped grooves two are formed on the outer surface of the U-shaped plate. The third traction line is inserted into the two J-shaped grooves two.

[0010] Preferably, one end of the rigid hollow rod is threadedly connected to the outer surface of the housing. And the other end of the rigid hollow rod is connected to a tail end connecting block by a screw.

[0011] Preferably, grooves are formed on the outer circumferential surfaces of the first roller and the second roller. And two stoppers are integrally connected in the grooves of the first roller and the second roller.

[0012] Preferably, a first turning twist is fixedly connected to one end of the first roller. A second turning twist is fixedly connected to one end of the second roller. Two rectangular holes are formed on the outer wall of the sleeve. One rectangular hole is for passing the second traction line. The other rectangular hole is for passing the third traction line.

[0013] Compared with the prior art, the present invention provides a multi-degree-of-freedom flexible arthroscopic forceps, which has the following beneficial effects: By using the handle control component of the present invention and through the cooperation of the finger ring, L-shaped rod and traction line, the opening and closing of the biting head body can be easily controlled to bite the diseased tissue. At the same time, by rotating the first turning knob and the second turning knob, the angles of the connecting plate and the U-shaped plate can be adjusted respectively, so that the forceps can flexibly change its posture and accurately reach complex positions inside the joint. Areas such as the deep part of the edge of the knee joint meniscus, which are difficult to reach by traditional forceps, can be effectively avoided from damaging the surrounding normal tissues, reducing the surgical difficulty, shortening the operation time, and improving the overall effect of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a perspective view of the present invention; Figure 2 is a perspective view of the forceps assembly in the present invention; Figure 3 is an exploded schematic view of the forceps assembly in the present invention; Figure 4 is a perspective view of the handle control component in the present invention; Figure 5 is a perspective view of the handle control component with the housing removed in the present invention; Figure 6 is a perspective view of the collar, L-shaped rod and finger ring in the present invention; Figure 7 is a perspective view of the sleeve, first rotating rod and second rotating rod in the present invention; Figure 8 is a perspective view of the first rotating rod and the second traction line in the present invention.

[0015] Wherein: 1. Forceps assembly; 11. Biting head body; 12. Hinge joint; 121. First J-shaped groove; 13. First pin shaft; 14. Torsion spring; 15. Connecting plate; 16. Second pin shaft; 17. U-shaped plate; 171. Second J-shaped groove; 18. Third pin shaft; 19. Tail end connecting block; 2. Handle control component; 21. Housing; 22. Sleeve; 23. Collar; 24. Ring groove; 25. L-shaped rod; 26. Finger ring; 27. Rope head thin rod; 28. First traction line; 29. First rotating rod; 210. Second rotating rod; 211. Second traction line; 212. Third traction line; 213. Handle body; 3. Rigid hollow rod; 4. Block; 5. First turning knob; 6. Second turning knob; 7. Rectangular hole. DETAILED DESCRIPTION OF THE INVENTION

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0017] Please refer to Figure 1 - Figure 3 , a multi-degree-of-freedom flexible arthroscopic forceps, including a forceps assembly 1, which includes two bite head bodies 11. One end of each of the two bite head bodies 11 is integrally connected with a hinge joint 12. A pin shaft one 13 is rotatably connected inside the hinge joint 12. A torsion spring 14 is sleeved on the outer surface of the pin shaft one 13. Both ends of the pin shaft one 13 are rotatably connected with connecting plates 15. A pin shaft two 16 is rotatably connected between the two connecting plates 15. A U-shaped plate 17 is rotatably connected to the outer surface of the pin shaft two 16. A pin shaft three 18 is rotatably connected inside the U-shaped plate 17. A tail end connection block 19 is rotatably connected to the outer surface of the pin shaft three 18; For the specific structure of the handle control assembly 2, please refer to Figure 4 - Figure 8 shown in the figure. It includes a housing 21. The lower surface of the housing 21 is fixedly connected with a handle body 213. A sleeve 22 is fixedly connected inside the housing 21. A collar 23 is rotatably connected to the outer surface of the sleeve 22. An annular groove 24 is opened on the outer surface of the collar 23. An L-shaped rod 25 is fixedly connected to the outer surface of the collar 23. A finger ring 26 is fixedly connected to the bottom end of the L-shaped rod 25. A rope head thin rod 27 is fixedly connected to the outer surface of the L-shaped rod 25. A first traction line 28 is tied to the outer surface of the rope head thin rod 27. A first rotating rod 29 and a second rotating rod 210 are rotatably connected inside the sleeve 22. The outer surface of the first rotating rod 29 is in sliding contact with a second traction line 211. The outer surface of the second rotating rod 210 is in sliding contact with a third traction line 212; A rigid hollow rod 3, one end of the rigid hollow rod 3 is connected to the forceps assembly 1, and the other end of the rigid hollow rod 3 is detachably connected to the handle control assembly 2.

[0018] Further, a J-shaped groove one 121 is opened on the end face of the hinge joint 12 around the axis direction of the pin shaft one 13, and the front end of the J-shaped groove one 121 inserts the first traction line 28.

[0019] Further, a circular groove is opened on the other end face of the hinge joint 12 for accommodating the torsion spring 14. Both ends of the torsion spring 14 are bent by ninety degrees, and both ends of the torsion spring 14 are respectively inserted into the inside of the two hinge joints 12.

[0020] Furthermore, an arc-shaped groove through which two L-shaped rods 25 can pass is formed in the outer wall of the housing 21. There are two first traction lines 28, one second traction line 211 and one third traction line 212. One ends of the two first traction lines 28 are fixedly connected to the rope head thin rods 27. The bottom end of one of the rope head thin rods 27 is fixedly connected to one of the L-shaped rods 25, and the top end of the other rope head thin rod 27 is fixedly connected to the other L-shaped rod 25.

[0021] By arranging the torsion spring 14 to be sleeved on the outer surface of the pin shaft one 13, and the two ends of the torsion spring 14 are respectively inserted into the two hinge joints 12. This structure enables the torsion spring 14 to apply an outward-opening force to the two bite head bodies 11 when no external force is applied, so that the bite head bodies 11 can be maintained in the initial open state; in the handle control assembly 2, the L-shaped rod 25 fixed on the outer surface of the collar 23 is connected to the rope head thin rod 27, and the rope head thin rod 27 is tied to the first traction line 28, and there are two first traction lines 28. A J-shaped groove one 121 is formed on the end face of the hinge joint 12 around the axis direction of the pin shaft one 13, and the front end of the first traction line 28 is inserted therein, and the head end of the first traction line 28 is pressed by screwing a micro screw into the hinge joint 12, so that the first traction line 28 can be fixed more firmly; when the doctor operates the handle control assembly 2, two fingers can be inserted into the two finger rings 26. When the two fingers drive the two finger rings 26 to approach each other, the two finger rings 26 drive the L-shaped rod 25 to move, and the two L-shaped rods 25 drive the two rope head thin rods 27 to rotate towards each other around the sleeve 22 and approach. In this way, the two rope head thin rods 27 will pull the first traction line 28. At this time, the first traction line 28 will generate a pulling force on the hinge joint 12 along the J-shaped groove one 121, overcoming the elastic force of the torsion spring 14, so that the two hinge joints 12 rotate around the pin shaft one 13, and then drive the two bite head bodies 11 to approach each other, realizing the closing action, so that the redundant meniscus structure in the joint can be bitten off; when the two fingers release the two finger rings 26, the first traction line 28 is released, and the torsion spring 14 immediately restores its deformation, pushing the two bite head bodies 11 to open again.

[0022] Furthermore, a wire groove is formed in the interior of the connecting plate 15 around the axis direction of the pin shaft two 16, and the second traction line 211 is inserted into the interior of the wire groove. Two J-shaped grooves two 171 are formed on the outer surface of the U-shaped plate 17, and the third traction line 212 is inserted into the two J-shaped grooves two 171.

[0023] Furthermore, one end of the rigid hollow rod 3 is threadedly connected to the outer surface of the housing 21, and the other end of the rigid hollow rod 3 is connected to the tail end connecting block 19 by screws.

[0024] When a doctor holds the handle body 213 with one hand and turns the first turning knob 5 with the other hand, the first turning rod 29 rotates accordingly. Since the second traction wire 211 is in sliding contact with the groove of the first turning rod 29, when the first turning rod 29 rotates, it will drive the second traction wire 211 to wind around its outer surface. Therefore, as the second traction wire 211 moves, the connecting plate 15 will be subjected to the pulling or pushing force from the second traction wire 211. With the pin two 16 as the rotation fulcrum, the connecting plate 15 will rotate around the pin two 16. For example, when the first turning rod 29 rotates clockwise, it will pull the second traction wire 211 to move to one side. Driven by the second traction wire 211, the connecting plate 15 rotates in the corresponding direction with the pin two 16 as the axis; if the first turning rod 29 rotates counterclockwise, the moving direction of the second traction wire 211 changes, and the rotating direction of the connecting plate 15 will also change accordingly.

[0025] Furthermore, grooves are provided on the outer circumferential surfaces of both the first turning rod 29 and the second turning rod 210, and two stoppers 4 are integrally connected in the grooves of the first turning rod 29 and the second turning rod 210.

[0026] Furthermore, one end of the first turning rod 29 is fixedly connected to the first turning knob 5, one end of the second turning rod 210 is fixedly connected to the second turning knob 6, and two rectangular holes 7 are provided on the outer wall of the sleeve 22. One of the rectangular holes 7 is for the second traction wire 211 to pass through, and the other rectangular hole 7 is for the third traction wire 212 to pass through.

[0027] When the doctor turns the second turning knob 6, the second turning rod 210 will rotate accordingly. Since the third traction wire 212 is in sliding contact with the groove of the second turning rod 210, the rotation of the second turning rod 210 will drive the third traction wire 212 to wind around its surface. The sliding of the third traction wire 212 in the J-shaped groove two 171 will generate a pulling or pushing force on the U-shaped plate 17. The U-shaped plate 17 is connected to other components through the pin three 18, and the pin three 18 becomes the rotation fulcrum. Under the action of the third traction wire 212, the U-shaped plate 17 rotates around the pin three 18. For example, if the second turning rod 210 rotates clockwise, the third traction wire 212 will be driven by it to move in a specific direction, generating a force that makes the U-shaped plate 17 rotate clockwise in the J-shaped groove two 171; if the second turning rod 210 rotates counterclockwise, the moving direction of the third traction wire 212 changes, and the rotating direction of the U-shaped plate 17 will also change accordingly, thereby realizing the flexible control of the rotation angle and direction of the U-shaped plate 17.

[0028] In use, the doctor holds the handle body 213 with one hand to get ready for the operation. Insert two fingers into the ring 26. If it is necessary to control the opening and closing of the bite head body 11, insert two fingers into the two rings 26. When the two fingers drive the rings 26 to approach each other, the L-shaped rod 25 and the thin rope head rod 27 move accordingly, pulling the first traction wire 28. The first traction wire 28 generates a pulling force on the hinge joint 12 along the J-shaped groove 121, overcoming the elastic force of the torsion spring 14, so that the two bite head bodies 11 approach and close to each other to bite off the redundant meniscus structure in the joint; when the fingers release the ring 26, the torsion spring 14 resumes deformation and pushes the bite head body 11 to open again; if it is necessary to adjust the rotation angle and direction of the connecting plate 15, turn the first turning knob 5 with the other hand, and the first turning rod 29 rotates accordingly, driving the second traction wire 211 to wind around its outer surface. The connecting plate 15 rotates around the second pin shaft 16 under the action of the pulling force or pushing force of the second traction wire 211. If it is necessary to control the rotation angle and direction of the U-shaped plate 17, turn the second turning knob 6, and the second turning rod 210 rotates to drive the third traction wire 212 to wind around its surface. The third traction wire 212 slides in the J-shaped groove 171 to generate a pulling force or pushing force on the U-shaped plate 17, so that the U-shaped plate 17 rotates around the third pin shaft 18. The overall structure enables the multi-joint of the forceps assembly 1 to rotate flexibly, can accurately find the edge part of the meniscus, is convenient for accelerating the operation speed and quickly repairing the meniscus.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-degree-of-freedom flexible arthroscopic forceps, characterized in that: Including, A bite forceps assembly (1), which includes two bite head bodies (11). One end of each of the two bite head bodies (11) is integrally connected with a hinge joint (12). A first pin shaft (13) is rotatably connected inside the hinge joint (12). A torsion spring (14) is sleeved on the outer surface of the first pin shaft (13). Both ends of the first pin shaft (13) are rotatably connected with connecting plates (15). A second pin shaft (16) is rotatably connected between the two connecting plates (15). A U-shaped plate (17) is rotatably connected to the outer surface of the second pin shaft (16). A third pin shaft (18) is rotatably connected inside the U-shaped plate (17). A tail end connection block (19) is rotatably connected to the outer surface of the third pin shaft (18); A handle control assembly (2), which includes a housing (21). A handle body (213) is fixedly connected to the lower surface of the housing (21). A sleeve (22) is fixedly connected inside the housing (21). A collar (23) is rotatably connected to the outer surface of the sleeve (22). An annular groove (24) is formed on the outer surface of the collar (23). An L-shaped rod (25) is fixedly connected to the outer surface of the collar (23). A finger ring (26) is fixedly connected to the bottom end of the L-shaped rod (25). A rope head thin rod (27) is fixedly connected to the outer surface of the L-shaped rod (25). A first traction wire (28) is tied to the outer surface of the rope head thin rod (27). A first roller (29) and a second roller (210) are rotatably connected inside the sleeve (22). The second traction wire (211) is in sliding contact with the outer surface of the first roller (29). The third traction wire (212) is in sliding contact with the outer surface of the second roller (210); A rigid hollow rod (3), one end of the rigid hollow rod (3) is connected to the bite forceps assembly (1), and the other end of the rigid hollow rod (3) is detachably connected to the handle control assembly (2).

2. The multi-degree-of-freedom flexible arthroscopic forceps according to claim 1, wherein: A J-shaped groove one (121) is formed on the end face of the hinge joint (12) around the axis direction of the first pin shaft (13), and the front end of the J-shaped groove one (121) inserts the first traction wire (28).

3. The multi-degree-of-freedom flexible arthroscopic forceps according to claim 1, characterized in that: A circular groove is formed on the other end face of the hinge joint (12) for accommodating the torsion spring (14). Both ends of the torsion spring (14) are bent by ninety degrees, and both ends of the torsion spring (14) are respectively inserted into the inside of the two hinge joints (12).

4. A multi-degree-of-freedom flexible arthroscopic forceps according to claim 1, characterized in that: An arc-shaped groove through which the two L-shaped rods (25) can pass is formed on the outer wall of the housing (21). Two first traction wires (28) are provided. One second traction wire (211) and one third traction wire (212) are provided. One ends of the two first traction wires (28) are fixedly connected to the rope head thin rods (27). The bottom end of one rope head thin rod (27) is fixedly connected to one L-shaped rod (25), and the top end of the other rope head thin rod (27) is fixedly connected to the other L-shaped rod (25).

5. The multi-degree-of-freedom flexible arthroscopic forceps according to claim 1, characterized in that: A wire groove is formed inside the connecting plate (15) around the axis direction of the second pin shaft (16), and a second traction wire (211) is inserted into the wire groove. Two second J-shaped grooves (171) are formed on the outer surface of the U-shaped plate (17), and a third traction wire (212) is inserted into each of the two second J-shaped grooves (171).

6. The multi-degree-of-freedom flexible arthroscopic forceps according to claim 1, wherein: One end of the rigid hollow rod (3) is threadedly connected to the outer surface of the housing (21), and the other end of the rigid hollow rod (3) is connected to the tail end connecting block (19) by screws.

7. A multi-degree-of-freedom flexible arthroscopic forceps according to claim 1, characterized in that: Grooves are formed on the outer circumferential surfaces of the first rotating rod (29) and the second rotating rod (210), and two stoppers (4) are integrally connected in the grooves of the first rotating rod (29) and the second rotating rod (210).

8. A multi-degree-of-freedom flexible arthroscopic forceps according to claim 1, characterized in that: One end of the first rotating rod (29) is fixedly connected to a first rotating knob (5), one end of the second rotating rod (210) is fixedly connected to a second rotating knob (6), and two rectangular holes (7) are formed in the outer wall of the sleeve (22). One of the rectangular holes (7) is for passing the second traction wire (211), and the other rectangular hole (7) is for passing the third traction wire (212).

Images