Anti-loosening quick-mounting type nucleus pulposus forceps

Abstract

This invention discloses a quick-release, anti-loosening nucleolysis forceps, relating to the field of medical device technology. The forceps includes a fixed handle, a movable handle, a pull wire, and an installation tube. The fixed handle has a connecting component inside, with the pull wire end inserted directly into the connecting groove of the connecting block and locked by a bottom locking module, facilitating adjustment of the initial pre-tightening position of the pull wire and solving the problem of easy loosening and breakage of traditional pull wires when bent. The distal end of the installation tube has a clamping component; the pull wire drives the movable forceps head to open and close via a moving block. The movable forceps head engages with a limiting groove on the moving block via a limiting pin, enabling quick forceps head replacement without disassembling the pull wire. The fixed handle also has a fixing component, which securely locks the installation tube through multiple limiting mechanisms including a stop block, a positioning sleeve, and a protective cover, preventing circumferential rotation and axial movement during surgery. This invention provides stable transmission, adjustable pre-tightening force, and convenient forceps head replacement, significantly improving the reliability and service life of the instrument.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a fast-release, anti-loosening nucleolysis forceps. Background Technology

[0002] In spinal surgery (such as percutaneous endoscopic lumbar discectomy), nucleus pulposus removal is the core step in treating disc herniation. As a key surgical instrument that penetrates the intervertebral space to bite and remove the diseased nucleus pulposus tissue, the stability of its mechanical transmission and the ease of clinical maintenance directly affect the efficiency and safety of the surgery.

[0003] Currently, conventional nucleolysis forceps mainly rely on the reciprocating linear motion of the wire moving through the tube to drive the opening and closing of the front jaws. However, the existing technology has the following significant defects in its overall structural design: First, in the transmission structure design at the power input end, traditional instruments usually process the proximal end of the wire used to pull the forceps head into a right-angle bend and directly and rigidly insert it into the pre-drilled hole at the top of the handle, relying on the swing of the handle to forcibly drive the wire to move. During surgery, surgeons need to frequently and forcefully squeeze the handle to cut the tough annulus fibrosus or nucleus pulposus. The bending and insertion points of the wire will be subjected to extremely high alternating shear stress. After long-term use, this rough, single-point force connection method is prone to metal fatigue, leading to play or even severe loosening at the wire insertion points. Once loosening occurs, the closing force applied by the handle will be lost at this point, causing the front clamping head to fail to close completely or the biting force to decrease significantly, directly manifesting as the dangerous situation of "not being able to clamp tightly or tear" during surgery. Moreover, due to this rigid structure, the tension of the wire itself cannot be manually adjusted and compensated after loosening. Secondly, for the front clamping component, the common design is to forcibly hammer the distal end of the wire into a bent shape. The flat, integrated structure, which is then directly snapped, riveted, or welded into the groove on the outside of the moving forceps head, leads to a serious clinical maintenance pain point: the fixed and moving forceps heads at the front end are consumable parts. When their cutting edges become dull or damaged due to frequent biting of bony or calcified tissue, doctors cannot disassemble and replace the forceps heads separately. Medical institutions must forcibly pull out and replace the still usable internal wires along with the discarded forceps heads as a whole component. In many cases, it is even necessary to discard the entire expensive surgical instrument. This not only causes a huge waste of medical consumables and increases procurement costs, but also makes it difficult to quickly repair and replace parts when the instrument suffers sudden wear on the operating table, seriously affecting the continuity of the surgical process.

[0004] In summary, existing nucleotomy clamps have significant limitations in terms of fatigue stability of the transmission connection, adjustability of initial tension of the wire drawing, and quick-release maintenance capability of the core clamping components. A novel structural solution is urgently needed to address these clinical pain points. Summary of the Invention

[0005] The present invention aims to solve the problem that the control part of the existing nucleoplasty forceps is prone to metal fatigue, resulting in loosening and inconvenience in replacement.

[0006] To address the aforementioned problems, this invention provides an anti-loosening quick-release nucleotomy forceps, comprising a fixed handle, a movable handle, a pull wire, and an installation tube. The fixed handle has an installation groove at its bottom, and the movable handle is rotatably mounted in the installation groove. The end of the fixed handle has an installation channel communicating with the installation groove, and the installation tube is disposed within the installation channel. The pull wire is movably mounted within the installation tube, and the diameter of the pull wire is smaller than the inner diameter of the installation tube. The device further includes: a connecting component disposed in the installation groove, used to connect the end of the movable handle to one end of the pull wire located in the installation groove and to adjust the initial position of the pull wire; a clamping component disposed at the end of the installation tube away from the fixed handle, and the other end of the pull wire is connected to the clamping component, used to control the opening and closing of the clamping component; and a fixing component disposed at the end of the fixed handle, used to lock the position of the installation tube.

[0007] The present invention provides an anti-loosening quick-release nucleolysis forceps, which, compared with the prior art, has the following beneficial effects, but is not limited to: To address the issues of metal fatigue leading to loosening and inconvenient replacement in the control components of existing nucleotomy forceps, this new forceps' main load-bearing frame comprises a fixed handle, a movable handle, and a mounting tube, all precision-machined from medical-grade high-strength martensitic stainless steel using CNC machining. The fixed handle, serving as the primary force-bearing component for the surgeon's grip, has a mounting groove with a large opening at its bottom to accommodate a complex transmission mechanism. The movable handle is smoothly mounted in this mounting groove via a high-strength shaft with low-friction damping washers. A mounting channel, fully communicating with the interior of the mounting groove, is located at the axial position of the front end of the fixed handle. The mounting tube, serving as the main body of the surgical probe, is tightly fitted within this mounting channel with minimal assembly tolerances. A wire responsible for long-distance power transmission is inserted and mounted within the entire length of the mounting tube's inner cavity. To effectively overcome the potential microscopic deformation of the wire under tension and the viscous resistance caused by residual body fluids, the outer cross-section of the wire... The diameter is designed to be slightly smaller than the inner diameter of the installation tube, thus forming a micron-level lubrication buffer gap. This invention also includes three core components cleverly arranged at the beginning, end, and connection points of the system: First, a connecting component is located inside the installation groove. This component acts as a bridge to smoothly convert the arc-shaped motion trajectory generated at the upper end of the handle and connect it to the proximal end of the wire located in the installation groove. It also gives the operator the freedom to adjust the initial tension of the wire, allowing for quick adjustment even if the wire becomes loose. Second, a clamping component is located at the end of the installation tube furthest from the fixed handle, extending into the lesion. The distal end of the wire protrudes from the tube opening and is concealedly connected to this clamping component, used to precisely control the opening and closing of the clamping component. Finally, a fixing component is located in the transition area at the end of the fixed handle. This fixing component, through an external wrapping and internal snap-fit ​​connection, is used to absolutely lock the spatial position of the installation tube to resist the enormous torsional shear forces during surgery, resulting in better performance.

[0008] Furthermore, the connecting component includes a connecting block disposed in the mounting groove, one end of the connecting block being rotatably connected to the top of the moving handle, the connecting block having a connecting groove on the side near the wire drawing end, and the wire drawing end being inserted into the connecting groove, and the bottom of the connecting block also having a locking module for locking the wire drawing into the connecting groove.

[0009] Furthermore, the locking module includes a first screw hole opened at the bottom of the connecting block, and the first screw hole is connected to the connecting groove. A first bolt is threaded into the first screw hole to hold the wire in the connecting groove.

[0010] Furthermore, the clamping assembly includes a sleeve, a fixed clamp head, and a movable clamp head. An annular groove is formed at the end of the mounting tube away from the fixed handle, and the sleeve is fixedly sleeved on the outside of the annular groove. A movable groove is formed on the upper surface of the sleeve, and the fixed clamp head is integrally disposed at the end of the movable groove. A movable block is movably mounted on the surface of the movable groove. The movable clamp head is rotatably disposed in the movable block, and the movable clamp head and the sleeve are rotatably connected. The movable block is connected to and linearly driven by the wire drawing mechanism, and is configured to cause the movable clamp head to rotate around the connection between the sleeve and the movable clamp head when moving on the surface of the movable groove.

[0011] Furthermore, the movable block has a connecting hole at one end near the mounting tube, and the end of the wire away from the fixed handle is fixedly installed in the connecting hole. The movable block has a rotating groove at one end away from the mounting tube, and the inner walls on both sides of the rotating groove have downward-facing limiting grooves. Limiting pins are fixedly installed on both sides of the movable pliers head, and the limiting pins are rotatably installed in the limiting grooves. The bottom of the sleeve has an installation port that communicates with the movable groove, and the movable pliers head is rotatably installed in the installation port through a pin.

[0012] Furthermore, the clamping surfaces of the fixed clamp head and the movable clamp head are also provided with clamping grooves to assist in clamping the nucleus pulposus.

[0013] Furthermore, the fixing component includes a protective cover and a stop block. A positioning sleeve is integrally fixedly installed at the end of the fixed handle, and the inner diameter of the positioning sleeve is consistent with the inner diameter of the installation channel. The positioning sleeve has slots on both sides. The stop block is fixedly installed on the outside of the installation tube, and the end of the stop block is engaged in the slot. A retaining groove is opened at one end of the protective cover near the positioning sleeve for fitting the protective cover onto the outside of the positioning sleeve. The stop block is located in the retaining groove, and when the protective cover abuts against the end of the fixed handle, the two sides of the stop block are respectively in contact with the end of the positioning sleeve and the inner wall of the retaining groove. A through hole communicating with the retaining groove is opened at the other end of the protective cover, and the installation tube passes through the through hole.

[0014] Furthermore, the bottom of the protective cover has a through hole that communicates with the retaining groove, and a second bolt is movably installed in the through hole. The bottom of the positioning sleeve has a second screw hole corresponding to the through hole, and the top end of the second bolt is threaded into the second screw hole.

[0015] Furthermore, a water inlet is provided on the outside of the installation tube for cleaning blood from the installation tube.

[0016] Furthermore, the bottom of the fixed handle is provided with a third screw hole that communicates with the installation channel, and a third bolt is threaded into the third screw hole to lock the installation tube into the installation channel. Attached Figure Description

[0017] Figure 1This is a first-view structural schematic diagram of an anti-loosening quick-release nucleotomy forceps according to an embodiment of the present invention; Figure 2 This is a second-view structural schematic diagram of an anti-loosening quick-release nucleotomy forceps according to an embodiment of the present invention; Figure 3 for Figure 2 Enlarged structural diagram at point A in the diagram; Figure 4 This is a third-view structural diagram of an anti-loosening quick-release nucleotomy forceps according to an embodiment of the present invention; Figure 5 for Figure 4 Enlarged structural diagram at point B in the diagram; Figure 6 This is a schematic diagram of the positioning sleeve in an anti-loosening quick-release nucleotomy forceps according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the internal structure of the mounting groove in an anti-loosening quick-release nucleotomy forceps according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the stop block in an anti-loosening quick-release nucleotomy forceps according to an embodiment of the present invention; Figure 9 This is a half-sectional schematic diagram of the protective cover in an anti-loosening quick-release nucleotomy forceps according to an embodiment of the present invention; Figure 10 for Figure 4 Enlarged structural diagram at point C; Figure 11 This is a schematic diagram of the clamping assembly in an anti-loosening quick-release nucleotomy forceps according to an embodiment of the present invention; Figure 12 This is a first-view structural diagram of the movable block in an anti-loosening quick-release nucleotomy forceps according to an embodiment of the present invention; Figure 13 This is a second-view structural diagram of the movable block in an anti-loosening quick-release nucleotomy forceps according to an embodiment of the present invention; Figure 14 This is a schematic diagram of the sleeve in a quick-release, anti-loosening nucleotomy forceps according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 11. Fixed handle; 12. Moving handle; 13. Mounting tube; 14. Wire drawing; 15. Mounting groove; 16. Mounting channel; 2. Connecting assembly; 21. Connecting block; 22. Connecting groove; 23. First screw hole; 3. Clamping assembly; 31. Sleeve; 32. Movable groove; 33. Moving block; 331. Connecting hole; 332. Rotating groove; 333. Limiting groove; 34. Moving pliers head; 341. Limiting pin; 35. Fixed pliers head; 36. Mounting port; 37. Clamping groove; 4. Fixing assembly; 41. Protective cover; 411. Through hole; 412. Stop groove; 413. Through hole; 42. Stop block; 43. Positioning sleeve; 431. Slot; 432. Second screw hole; 5. Water inlet; 6. Third screw hole. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, specific embodiments of this application are described clearly and completely below with reference to the accompanying drawings. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0020] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," "comprise," etc., in the specification, claims, and accompanying drawings of this application are open-ended terms, indicating that a method comprises one or more steps, or an apparatus comprises one or more elements, but do not exclude the inclusion of other steps or elements. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or primary / secondary relationship. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] Furthermore, in the attached diagram, the X-axis represents the horizontal direction, that is, the left and right position, and the positive direction of the X-axis (that is, the direction the arrow points to) represents the right, and the negative direction of the X-axis (that is, the direction opposite to the positive direction of the X-axis) represents the left; in the attached diagram, the Y-axis represents the vertical direction, that is, the front and back position, and the positive direction of the Y-axis (that is, the direction the arrow points to) represents the front, and the negative direction of the Y-axis (that is, the direction opposite to the positive direction of the Y-axis) represents the back; in the attached diagram, the Z-axis represents the vertical direction, that is, the up and down position, and the positive direction of the Z-axis (that is, the direction the arrow points to) represents the up, and the negative direction of the Z-axis (that is, the direction opposite to the positive direction of the Z-axis) represents the down.

[0023] It should also be noted that the aforementioned X-axis, Y-axis and Z-axis are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0026] See Figures 1-14An embodiment of the present invention provides an anti-loosening quick-release nucleotomy forceps, comprising a fixed handle 11, a movable handle 12, a pull wire 14, and an installation tube 13. The fixed handle 11 has an installation groove 15 at its bottom, and the movable handle 12 is rotatably mounted in the installation groove 15. The end of the fixed handle 11 has an installation channel 16 communicating with the installation groove 15, and the installation tube 13 is disposed in the installation channel 16. The pull wire 14 is movably mounted in the installation tube 13, and the diameter of the pull wire 14 is smaller than the inner diameter of the installation tube 13. The forceps also include… Includes: a connecting component 2, which is disposed in the mounting groove 15 and is used to connect the end of the moving handle 12 to one end of the wire drawing 14 located in the mounting groove 15 and to adjust the initial position of the wire drawing 14; a clamping component 3, which is disposed at one end of the mounting tube 13 away from the fixed handle 11 and the other end of the wire drawing 14 is connected to the clamping component 3, and is used to control the opening and closing of the clamping component 3; and a fixing component 4, which is disposed at the end of the fixed handle 11 and is used to lock the position of the mounting tube 13.

[0027] In this embodiment, addressing the problem of metal fatigue leading to loosening and inconvenient replacement in the control section of existing nucleus pulposus forceps, the main force-bearing frame of this forceps includes a fixed handle 11, a movable handle 12, and a mounting tube 13, all precision-machined from medical-grade high-strength martensitic stainless steel using CNC machining. The fixed handle 11 serves as the main force-bearing base for the doctor's grip, and its bottom has a mounting groove 15 with a large opening margin to accommodate the complex transmission mechanism. The movable handle 12 is smoothly mounted in the mounting groove 15 via a high-strength rotating shaft with low-friction damping washers. An mounting channel 16, completely communicating with the interior space of the mounting groove 15, is located at the axial position of the front end of the fixed handle 11. The mounting tube 13, serving as the main body of the surgical probe, is tightly fitted into the mounting channel 16 with minimal assembly tolerances. A wire 14, responsible for long-distance power transmission, is movably inserted and installed within the entire length of the mounting tube 13. To fully overcome the potential microscopic deformation of the wire 14 under tension and the viscous resistance caused by residual body fluid, the outer surface of the wire 14... The cross-sectional diameter of the part is designed to be slightly smaller than the inner diameter of the installation tube 13, thereby forming a micron-level lubrication buffer gap. The invention also includes three core components cleverly arranged at the beginning, end and connection points of the system: First, the connecting component 2 is set in the internal space of the installation groove 15. This component acts as a bridge to smoothly convert the arc motion trajectory generated by the upper end of the moving handle 12 and connect it to the proximal end of the wire 14 located in the installation groove 15. At the same time, it gives the operator the freedom to adjust the initial tension position of the wire 14. Even if the wire 14 becomes loose, it can be quickly adjusted. Second, the clamping component 3 is set at the end of the installation tube 13 that is far from the fixed handle 11 and penetrates into the lesion. The distal end of the wire 14 passes through the tube opening and is concealedly connected to the clamping component 3 for precise control of the opening and closing action of the clamping component 3. Finally, the fixing component 4 is set in the transition area at the end of the fixed handle 11. The fixing component 4 is used to absolutely lock the spatial position of the installation tube 13 by combining external wrapping and internal snap-fit ​​to resist the huge torsional shear force during the operation, resulting in better performance.

[0028] Optional, please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 The connecting component 2 includes a connecting block 21 disposed in the mounting groove 15. One end of the connecting block 21 is rotatably connected to the top end of the handle 12. A connecting groove 22 is provided on the side of the connecting block 21 near the wire drawing 14, and the end of the wire drawing 14 is inserted into the connecting groove 22. A locking module is also provided at the bottom of the connecting block 21 for locking the wire drawing 14 into the connecting groove 22.

[0029] In this embodiment, the internal structure of the connecting component 2 has been significantly improved to enhance the transmission stability of the power source. Because the tail of the wire 14 in traditional nucleotomy forceps must be forcibly bent at a 90-degree angle and hung on the moving handle 12, each clamping action generates significant metal fatigue stress at the bending point, ultimately leading to breakage. Therefore, this embodiment introduces a solid metal connecting block 21 independently located inside the mounting groove 15. A miniature hard bearing is inserted between the end of the connecting block 21 facing the handle and the highest force-bearing tip of the moving handle 12 to achieve a smooth rotational hinge connection. Furthermore, the side of the connecting block 21 closest to the front end of the wire 14 extends axially along the wire 14. The connecting block 21 has a deep blind hole-shaped connecting groove 22 made by wire EDM. The tail end of the wire 14 can be directly inserted into the connecting groove 22 without any deformation processing. In order to prevent the wire 14 from slipping out of the smooth groove during surgical traction movements of up to tens of Newtons, the bottom end face of the connecting block 21 is also equipped with a strong locking module. As a key pre-tightening mechanism, the locking module can lock the wire 14 into the current scale of the connecting groove 22 after the doctor pushes and pulls the wire 14 to the most comfortable initial response position according to his own hand size and strength habits. This achieves a high degree of customization of the instrument to adapt to the operating preferences of different surgeons.

[0030] Optional, please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 The locking module includes a first screw hole 23 at the bottom of the connecting block 21, and the first screw hole 23 is connected to the connecting groove 22. A first bolt is threaded into the first screw hole 23 to hold the wire 14 in the connecting groove 22.

[0031] In this embodiment, the most optimized and reliable mechanical implementation scheme in the harsh environment of the operating room is further presented. Considering that the thermal expansion and contraction effect of surgical instruments during high-temperature and high-pressure steam sterilization may cause the failure of complex spring-locking structures, the locking module of this embodiment abandons complex linkage components and directly adopts the physical principle of mechanical locking. Its specific structure includes a high-precision first screw hole 23 that is vertically opened through the bottom surface of the solid connecting block 21. The depth of the first screw hole 23 directly cuts into and is completely connected to the internal space of the connecting groove 22 that accommodates the wire 14. A first bolt with matching threads and made of superhard alloy is screwed into the first screw hole 23. The end of the first bolt is beveled to prevent direct cutting of the wire 14. With the corner blunting treatment, when the nurse completes the assembly on the preoperative preparation table, she only needs to use a standard Allen wrench to pass through the open bottom of the mounting slot 15 of the fixed handle 11 and tighten the first bolt. The blunt end of the bolt will then press down and squeeze the side wall of the wire 14 located deep in the connecting slot 22 like a vise. Utilizing the huge static friction and micro-elastic deformation generated between the two, the wire 14 is completely anchored inside the connecting block 21. This structure not only has an extremely high tensile strength limit, but also, if the wire 14 naturally elongates after a few years of use, causing the jaws to not close tightly, the maintenance personnel only need to slightly loosen the bolt, push the wire 14 in one millimeter more, and then retighten it to make the instrument look brand new. The maintenance cost is extremely low and the use effect is better.

[0032] Optional, please refer to Figure 4 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14 The clamping assembly 3 includes a sleeve 31, a fixed clamp head 35, and a movable clamp head 34. The end of the mounting tube 13 away from the fixed handle 11 has an annular groove, and the sleeve 31 is fixedly sleeved on the outside of the annular groove. The upper surface of the sleeve 31 has a movable groove 32, and the fixed clamp head 35 is integrally disposed at the end of the movable groove 32. A movable block 33 is movably mounted on the surface of the movable groove 32. The movable clamp head 34 is rotatably disposed in the movable block 33, and the movable clamp head 34 and the sleeve 31 are rotatably connected. The movable block 33 is connected to and linearly driven by the wire drawing 14, and is configured to cause the movable clamp head 34 to rotate around the connection between the sleeve 31 and the movable clamp head 34 when it moves on the surface of the movable groove 32.

[0033] In this embodiment, to achieve maximum biting and destructive force within a very small working cross-sectional area, the clamping assembly 3 employs a slider-crank force-increasing mechanism. Its main structure includes a cylindrical sleeve 31, a fixed clamping head 35 providing support, and a moving clamping head 34 performing the cutting action. A recessed annular groove is machined into the outer wall of the distal end of the mounting tube 13, and the rear skirt of the sleeve 31 is fixedly fitted to the outside of this annular groove via an interference fit to ensure absolute sealing and connection strength. To allow for the movement trajectory of the internal transmission components, the upper surface of the sleeve 31 is milled. The device has a through-hole 32, and the fixed clamp head 35 is integrally machined and set at the front end of the through-hole 32 as the force-bearing point. A movable block 33, which acts as a power relay station, is movably installed on the inner surface of the through-hole 32. When the wire drawing 14 drives the movable block 33 to move on the surface of the through-hole 32, the movable block 33 will cause the movable clamp head 34 to move together. Thus, according to the lever principle, the movable clamp head 34 is caused to rotate upward around the hinge connection between it and the sleeve 31, thereby realizing the opening and closing operation between the fixed clamp head 35 and the movable clamp head 34, resulting in better performance.

[0034] Optional, please refer to Figure 4 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14 The movable block 33 has a connecting hole 331 at one end near the mounting tube 13, and the end of the wire 14 away from the fixed handle 11 is fixedly installed in the connecting hole 331. The movable block 33 has a rotating groove 332 at one end away from the mounting tube 13, and the inner walls of both sides of the rotating groove 332 have downward-opening limiting grooves 333. Limiting pins 341 are fixedly installed on both sides of the movable pliers head 34, and the limiting pins 341 are rotatably installed in the limiting grooves 333. The bottom of the sleeve 31 has an installation port 36 that communicates with the movable groove 32, and the movable pliers head 34 is rotatably installed in the installation port 36 through a pin.

[0035] In this embodiment, to achieve rapid replacement of the movable forceps head 34 on the operating table within seconds without damaging the main body of the wire 14, the joint between the moving block 33 and the movable forceps head 34 has been reconstructed. Specifically, the moving block 33 has a deep-hole-shaped connecting hole 331 at one end near the rear mounting tube 13, and the front end of the wire 14 protruding from the mounting tube 13 is fixedly installed in the connecting hole 331 by silver brazing or physical pressing to ensure that it will never fall off. The moving block 33 has a wide rotating groove 332 along the axial direction at the far end near the front end to accommodate the tail of the forceps head. On the inner walls of the solid on both sides of the rotating groove 332, a vertically downward-opening, inverted U-shaped limiting groove 333 is finely milled. To match this structure, two outwardly protruding cylindrical limiting pins 341 are symmetrically welded and fixed at corresponding positions on the left and right sides of the tail of the movable forceps head 34. In the assembled state, these two limiting pins 341 slide in from below and... The sleeve 31 is rotatably installed in the downward-facing limiting groove 333. Furthermore, the bottom surface of the front part of the sleeve 31 has an installation port 36 that communicates vertically with the upper movable groove 32. The pivot point of the movable forceps head 34 is rotatably installed in this installation port 36 via an independent pin inserted from the side. The advantage of this ingenious design is that when the movable forceps head 34 wears out due to long-term use, the circulating nurse only needs to use a special needle ejector to push out the pin at the bottom of the sleeve 31. The movable forceps head 34 will fall naturally after losing its lower support. At this time, the moving block 33 connected to the pull wire 14 above is slightly raised at a very small angle, and the limiting pins 341 on both sides of the movable forceps head 34 will naturally disengage completely from the downward-facing limiting groove 333 of the moving block 33. The entire disassembly process takes less than ten seconds and does not require touching or cutting the pull wire 14 deeply embedded inside the tubing. This greatly overturns the traditional maintenance logic of the nucleus pulposus forceps, resulting in better performance.

[0036] Optional, please refer to Figure 13 The clamping surfaces of the fixed clamp head 35 and the movable clamp head 34 are also provided with clamping grooves 37 to assist in clamping the nucleus pulposus.

[0037] In this embodiment, a recessed clamping groove 37 is provided on the clamping surface where the fixed clamping head 35 and the movable clamping head 34 approach each other and finally fit together, using a micron-level CNC machine tool. When the two clamping heads are fully engaged, the cavities inside the upper and lower clamping grooves 37 will automatically assemble to form a tiny temporary storage compartment, which can completely wrap the cut small fragments of pathological tissue inside the clamping head and carry them out of the body, avoiding tissue debris from falling into the spinal canal and causing postoperative aseptic inflammatory infection. This comprehensively improves the safety threshold of the surgery from the details.

[0038] Optional, please refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 The fixing component 4 includes a protective cover 41 and a stop block 42. The end of the fixed handle 11 is integrally fixedly installed with a positioning sleeve 43, and the inner diameter of the positioning sleeve 43 is consistent with the inner diameter of the installation channel 16. The positioning sleeve 43 has slots 431 on both sides. The stop block 42 is fixedly installed on the outside of the installation tube 13, and the end of the stop block 42 is engaged in the slot 431. The end of the protective cover 41 near the positioning sleeve 43 has a retaining groove 412 for fitting the protective cover 41 onto the outside of the positioning sleeve 43. The stop block 42 is located in the retaining groove 412, and when the protective cover 41 abuts against the end of the fixed handle 11, the two sides of the stop block 42 are respectively in contact with the end of the positioning sleeve 43 and the inner wall of the retaining groove 412. The other end of the protective cover 41 has a through hole 411 communicating with the retaining groove 412, and the installation tube 13 passes through the through hole 411.

[0039] In this embodiment, the fixing component 4 mainly consists of two core components: a metal protective cover 41 and a rigid stop block 42. Specifically, a cylindrical positioning sleeve 43 is integrally formed and fixedly installed on the surface of the protruding transition section at the foremost end of the fixed handle 11. The inner diameter of the central hole of the positioning sleeve 43 and the inner diameter of the installation channel 16 extending into it maintain absolute high-precision coaxial alignment. Right-angled slots 431 are symmetrically formed on the left and right sides of the cylindrical surface of the positioning sleeve 43 along the tangential direction. To cooperate with the slots 431, two protruding rectangular stop blocks 42 are welded and fixed to the outer wall of the installation tube 13, which passes through the slots and has been adjusted for its extension length. During assembly, the tail ends of these stop blocks 42 are tightly and directly snapped into the slots 431 of the positioning sleeve 43. This step geometrically eliminates any possibility of circumferential rotation of the installation tube 13. To prevent the stop 42 from detaching under force, the inner wall of the protective cover 41, which is fitted onto the outside, near the rear positioning sleeve 43, is machined with a sufficiently deep annular groove 412. This groove is used to tightly fit the entire protective cover 41 onto the outer surface of the positioning sleeve 43. After assembly, the stop 42, which is fixed to the tube wall, is completely covered and confined in the sealed cavity formed by the groove 412. When the operator pushes the protective cover 41 backward to the limit position where it firmly holds the thick end of the fixed handle 11, the front and rear sides of the stop 42 form a rigid fit with the end face of the rear positioning sleeve 43 and the solid inner wall of the front groove 412 with zero gap. This achieves absolute locking of any slight shaking or displacement of the installation tube 13 in any dimension. The installation tube 13 is also very easy to disassemble; only the protective cover 41 needs to be removed, resulting in better performance.

[0040] Optional, please refer to Figure 7 and Figure 9The bottom of the protective cover 41 is provided with a through hole 413 that communicates with the retaining groove 412, and a second bolt is movably installed in the through hole 413. The bottom of the positioning sleeve 43 is provided with a second screw hole 432 corresponding to the through hole 413, and the top end of the second bolt is threaded into the second screw hole 432.

[0041] In this embodiment, a positive spiral anti-pull-out safety mechanism is further added to the fixing component 4. Specifically, a countersunk through hole 413 is radially opened through the thick tube wall at the bottom of the outer protective cover 41, which is completely connected to the plane of the internal hidden retaining groove 412. A high-strength second bolt with an internal hexagonal groove is pre-installed in the through hole 413. In order to form a corresponding fit, a second screw hole 432, which is axially aligned with the above-mentioned through hole 413, is pre-cut on the solid bottom surface of the positioning sleeve 43 located inside the protective cover 41 using a tap. This is for the final calibration and assembly of the surgical instruments. In this process, the engineer simply needs to keep the protective cover 41, which is already in place and pressed against the handle, stationary. Then, the top thread of the second bolt is screwed into the second threaded hole 432 of the positioning sleeve 43, until the bolt head is completely submerged in the groove of the through hole 413 of the protective cover 41 to prevent it from snagging the doctor's sterile gloves. The radial locking torque provided by the second bolt makes the protective cover 41, the positioning sleeve 43, and the stop block 42 of the installation tube 13 sandwiched in the middle integrated, fundamentally eliminating the risk of medical accidents caused by instrument deformation and disintegration during surgery, ensuring the extremely high operational confidence required for spinal surgery, and achieving better results.

[0042] Optional, please refer to Figure 1 and Figure 8 The installation tube 13 is also provided with a water inlet 5 on the outside for cleaning blood in the installation tube 13.

[0043] In this embodiment, when the scrub nurse on the operating table experiences signs of stiffness in the instruments during surgery, or when the cleaning personnel in the sterilization supply center perform postoperative pretreatment, they can directly screw a syringe filled with pressurized saline or multi-enzyme cleaning solution onto the injection port 5. As the injection pressure surges, a high-speed liquid flow will violently flush the entire surface of the wire 14 from back to front along the inner cavity of the mounting tube 13, and finally gush out from the gap of the clamping component 3 at the front end, sweeping away the deposited blood and dirt, effectively ensuring the absolute smoothness of the mechanical transmission, and greatly improving the instrument cleaning qualification rate and the better use effect.

[0044] Optional, please refer to Figure 3 , Figure 5 and Figure 7 The bottom of the fixed handle 11 is also provided with a third screw hole 6 that communicates with the installation channel 16, and a third bolt is threaded into the third screw hole 6 to lock the installation tube 13 into the installation channel 16.

[0045] In this embodiment, a "redundancy insurance" design is introduced into the system architecture of the entire device. Considering the low-probability extreme failure condition that the second bolt on the protective cover 41 may unexpectedly strip due to lack of maintenance for a long time or severe vibration, in order to prevent the catastrophic consequence of the entire installation tube 13 with sharp pliers suddenly darting forward and piercing the abdominal aorta in front of the patient's spine after the restraint of the fixing component 4 is lost, this embodiment additionally provides a third screw hole 6 in the thick metal base at the bottom of the fixed handle 11, which is directly connected to the internal longitudinal installation channel 16, and the position of the third screw hole 6 is deliberately arranged away from the front. Behind the surgical interference zone, in the safe area, a third bolt with anti-slip knurling at the tail is screwed into the third screw hole 6. In daily use, the flat bearing surface at the front end of the third bolt penetrates the handle base and directly abuts against the outer cylindrical surface of the end of the installation tube 13. It uses pure mechanical static friction to forcibly lock the installation tube 13 into the current position of the installation channel 16. In the event of extreme loosening of the fixing component 4, the third bolt provides the last line of defense to ensure that the installation tube 13 and the fixed handle 11 always maintain a stable connection. This multi-point support structure makes the entire nucleus pulposus forceps a surgical system with extremely high rigidity and better performance.

[0046] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A quick-release, anti-loosening nucleolysis forceps, characterized in that, The assembly includes a fixed handle (11), a movable handle (12), a wire (14), and a mounting tube (13). The fixed handle (11) has a mounting groove (15) at its bottom, and the movable handle (12) is rotatably mounted in the mounting groove (15). The fixed handle (11) has a mounting channel (16) at its end that communicates with the mounting groove (15), and the mounting tube (13) is located in the mounting channel (16). The wire (14) is movably mounted in the mounting tube (13), and the diameter of the wire (14) is smaller than the inner diameter of the mounting tube (13). The assembly also includes: A connecting component (2) is disposed in a mounting groove (15) for connecting the end of the moving handle (12) to one end of the wire drawing (14) located in the mounting groove (15) and adjusting the initial position of the wire drawing (14); The clamping assembly (3) is located at one end of the mounting tube (13) away from the fixed handle (11), and the other end of the wire (14) is connected to the clamping assembly (3) for controlling the opening and closing of the clamping assembly (3); Fixing component (4), which is located at the end of the fixing handle (11), is used to lock the position of the mounting tube (13).

2. The anti-loosening quick-release nucleolysis forceps according to claim 1, characterized in that, The connecting component (2) includes a connecting block (21) disposed in the mounting groove (15). One end of the connecting block (21) is rotatably connected to the top of the moving handle (12). A connecting groove (22) is provided on the side of the connecting block (21) near the wire (14), and the end of the wire (14) is inserted into the connecting groove (22). A locking module is also provided at the bottom of the connecting block (21) for locking the wire (14) into the connecting groove (22).

3. The anti-loosening quick-release nucleolysis forceps according to claim 2, characterized in that, The locking module includes a first screw hole (23) opened at the bottom of the connecting block (21), and the first screw hole (23) and the connecting groove (22) are connected. A first bolt is threaded in the first screw hole (23) to hold the wire (14) in the connecting groove (22).

4. The anti-loosening quick-release nucleolysis forceps according to claim 1, characterized in that, The clamping assembly (3) includes a sleeve (31), a fixed clamp head (35), and a movable clamp head (34). The mounting tube (13) has an annular groove at one end away from the fixed handle (11), and the sleeve (31) is fixedly sleeved on the outside of the annular groove. The upper surface of the sleeve (31) has a movable groove (32), and the fixed clamp head (35) is integrally disposed at the end of the movable groove (32). A movable block (33) is movably mounted on the surface of the movable groove (32). The movable clamp head (34) is rotatably disposed in the movable block (33), and the movable clamp head (34) and the sleeve (31) are rotatably connected. The movable block (33) is connected to and linearly driven by the wire drawing (14), and is configured to cause the movable clamp head (34) to rotate around the connection between the sleeve (31) and the movable clamp head (34) when moving on the surface of the movable groove (32).

5. The anti-loosening quick-release nucleolysis forceps according to claim 4, characterized in that, The movable block (33) has a connecting hole (331) at one end near the mounting tube (13), and the end of the wire (14) away from the fixed handle (11) is fixedly installed in the connecting hole (331). The movable block (33) has a rotating groove (332) at one end away from the mounting tube (13), and the inner walls of the rotating groove (332) have downward-facing limiting grooves (333). The movable pliers head (34) has limiting pins (341) fixedly installed on both sides, and the limiting pins (341) are rotatably installed in the limiting grooves (333). The bottom of the sleeve (31) has an installation port (36) that communicates with the movable groove (32), and the movable pliers head (34) is rotatably installed in the installation port (36) through a pin.

6. The anti-loosening quick-release nucleolysis forceps according to claim 5, characterized in that, The clamping surfaces of the fixed clamp head (35) and the movable clamp head (34) are also provided with clamping grooves (37) to assist in clamping the nucleus pulposus.

7. The anti-loosening quick-release nucleolysis forceps according to claim 1, characterized in that, The fixing component (4) includes a protective cover (41) and a stop (42). A positioning sleeve (43) is integrally fixedly installed at the end of the fixed handle (11), and the inner diameter of the positioning sleeve (43) is consistent with the inner diameter of the installation channel (16). The positioning sleeve (43) has slots (431) on both sides. The stop (42) is fixedly installed on the outside of the installation tube (13), and the end of the stop (42) is engaged in the slot (431). The protective cover (41) has an opening at one end near the positioning sleeve (43). A retaining groove (412) is provided for fitting the protective cover (41) onto the outside of the positioning sleeve (43). The retaining block (42) is located in the retaining groove (412). When the protective cover (41) abuts against the end of the fixed handle (11), the two sides of the retaining block (42) are respectively in contact with the end of the positioning sleeve (43) and the inner wall of the retaining groove (412). The other end of the protective cover (41) is provided with a through hole (411) that communicates with the retaining groove (412), and the mounting tube (13) passes through the through hole (411).

8. The anti-loosening quick-release nucleolysis forceps according to claim 7, characterized in that, The bottom of the protective cover (41) is provided with a through hole (413) that communicates with the retaining groove (412), and a second bolt is movably installed in the through hole (413). The bottom of the positioning sleeve (43) is provided with a second screw hole (432) corresponding to the through hole (413), and the top end of the second bolt is threaded into the second screw hole (432).

9. The anti-loosening quick-release nucleolysis forceps according to claim 1, characterized in that, The installation tube (13) is also provided with a water inlet (5) on the outside for cleaning blood in the installation tube (13).

10. A quick-release, anti-loosening nucleolysis forceps according to claim 8, characterized in that, The bottom of the fixed handle (11) is also provided with a third screw hole (6) that communicates with the installation channel (16), and a third bolt is threaded in the third screw hole (6) to lock the installation tube (13) into the installation channel (16).

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