Rotatable vertebral plate rongeur

Abstract

The utility model relates to the technical field of medical instruments, and particularly discloses a rotatable vertebral plate rongeur which comprises a fixed rongeur handle and a rotating rongeur handle, a sleeve is arranged on the fixed rongeur handle, a connector is arranged on the rotating rongeur handle, the connector penetrates through the fixed rongeur handle and then enters the sleeve, a positioning pin is arranged in the sleeve, and the rotating rongeur handle is connected with the positioning pin. The forceps rod rotates to adjust the angle of the clamping combination during bone biting, the forceps rod is positioned through a positioning pin, a slidable guide rod is arranged in the forceps rod, a fixed forceps face is arranged at the end of the forceps rod, the guide rod is connected with a sliding forceps mouth, the fixed forceps face and the sliding forceps mouth form the clamping combination, and the end, close to the fixed forceps handle, of the guide rod extends into the sleeve from the forceps rod. The guide rod is sleeved with a spring, a baffle is arranged at the end of the guide rod, the two ends of the spring abut against the end face of the forceps rod and the baffle respectively, the connector abuts against the baffle, and when the rotating forceps handle rotates, the guide rod is driven to slide in the length direction of the forceps rod. And the bone rongeur direction of the clamping combination is adjusted by rotating the forceps rod, so that bone rongeur can be conveniently carried out in different directions.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically a rotatable lamina bone-biting forceps. Background Technology

[0002] The laminectomy forceps are orthopedic surgical tools primarily used for bone removal during spinal surgery. Currently, the jaws of commonly used laminectomy forceps have a fixed direction. This makes angle adjustment inconvenient when using them in the confined spaces between bones, limiting them to removing dead bone in only one direction. They are not suitable for removing dead bone from the interosseous walls or other locations, and their direction of use is difficult to adjust. Utility Model Content

[0003] This invention addresses the problem of inconvenient bone-biting operations during surgery caused by the fixed jaws of lamina biting forceps. It provides a rotatable lamina biting forceps with rotatable jaws that can change direction.

[0004] To solve the above-mentioned technical problems, this utility model includes a fixed clamp handle, which is hinged to a rotating clamp handle, and a clamping assembly for biting bone. Its structural features are: a fixed sleeve is provided on the fixed clamp handle, and a connector is provided on the rotating clamp handle. The connector passes through the fixed clamp handle and enters the sleeve. A positioning pin is provided inside the sleeve to prevent the clamp rod from slipping out of the sleeve. One end of the clamp rod is inserted into the sleeve. The clamp rod rotates to adjust the angle when the clamping assembly bites bone. The clamp rod is positioned by the positioning pin. A slidable guide rod is provided inside the clamp rod. The end of the guide rod away from the fixed handle is provided with a fixed jaw, and the end of the guide rod away from the fixed handle is connected to a sliding jaw. The fixed jaw and the sliding jaw form a clamping assembly for biting bones. The end of the guide rod near the fixed handle extends from the rod into the sleeve. A spring is sleeved on the outside of the section of the guide rod inside the sleeve. At least one baffle is provided at the end of the guide rod near the fixed handle. The two ends of the spring abut against the end face of the rod inside the sleeve and the baffle, respectively. The connector abuts against the baffle. When the rotating handle is rotated, it drives the guide rod to slide along the length of the rod.

[0005] With the above structure, when no external force is applied to the rotating clamp handle by hand, the spring exerts a spring force on the clamp bar in the direction away from the fixed clamp handle under the action of the spring force. Under the blocking action of the positioning pin, the clamp bar cannot be dislodged from the sleeve. At this time, the spring presses the clamp bar against the limit shaft, and the position of the clamp bar is determined. The spring exerts a spring force on the baffle in the direction of the fixed clamp handle, so that the guide rod drives the sliding jaw to slide a certain distance towards the fixed clamp handle. At this time, the clamping assembly is in the open state. When the bone biting operation is performed, the rotating clamp handle is rotated, so that the connecting head pushes the baffle to slide away from the fixed clamp handle, which in turn drives the guide rod and the sliding jaw to slide away from the fixed clamp handle. The clamping assembly closes to perform the bone biting operation. When the bone biting operation is completed, the rotating clamp handle is released, and the spring force on the baffle causes the clamping assembly to automatically return to the open state. When it is necessary to change the bone-biting angle of the clamping assembly, apply a pushing force to the clamp bar by hand towards the fixed clamp handle to disengage the clamp bar from the positioning pin. Rotate the clamp bar, and the direction of the fixed clamp face and the sliding clamp jaw will change accordingly. When the bone-biting direction of the clamping assembly is rotated to the appropriate position, release the clamp bar. The spring will hold the clamp bar against the positioning pin, and the clamp bar will be positioned, thus determining the bone-biting direction of the clamping assembly. Adjusting the bone-biting direction of the clamping assembly by rotating the clamp bar facilitates the removal of dead bone from the interosseous sidewalls and other locations.

[0006] The fixed clamp handle includes a first hand handle and a connecting part. The sleeve is fixedly connected to the connecting part. A slot is provided at the connection between the first hand handle and the connecting part. A gap is provided on the sleeve that communicates with the slot. The rotating clamp handle includes a second hand handle. The upper part of the second hand handle is fixedly connected to a connecting head. The connecting head passes through the slot and the gap and enters the sleeve.

[0007] The clamp bar includes a thick clamp bar section and a thin clamp bar section. The end of the thick clamp bar section near the fixed clamp handle is inserted into the sleeve. The end of the thin clamp bar section away from the thick clamp bar section is connected to a slide rail section with a sliding table. The thick clamp bar section, the thin clamp bar section, and the slide rail section are provided with a connecting slide for the guide bar to slide. The fixed clamping face is located at the end of the slide rail section away from the fixed clamp handle. The sliding jaw slides along the length of the slide rail section.

[0008] The slide rail section is provided with a limiting protrusion to prevent the sliding jaws from sliding towards the fixed jaw. The limiting protrusion is located at the end of the slide rail section near the thin jaw bar section of the fixed jaw.

[0009] The outer wall of the coarse clamp bar section is provided with multiple slots into which a positioning pin can be inserted. The slots are located at the end of the coarse clamp bar section near the fixed clamp handle. After the positioning pin is inserted into the slot, the clamp bar cannot rotate. A connecting channel is provided between the multiple slots. The connecting channel is connected to the outside through a slot gate. The positioning pin can pass through the connecting channel and the slot gate.

[0010] The slots and slot gates are evenly distributed around the periphery of the clamp rod.

[0011] The positioning pin is detachably connected to the sleeve.

[0012] The outer surface of the clamp bar is provided with a non-slip friction part.

[0013] The slide rail section is provided with a limiting slide rail arranged along the length of the clamp bar. The two sides of the sliding jaw are provided with downwardly extending limiting sidewalls. The two sides of the limiting slide rail are slide platforms for sliding the limiting sidewalls. The bottom of the limiting sidewall is provided with an inner protrusion. The upper two sides of the limiting slide rail are provided with outer protrusions. The outer protrusions do not extend to the section of the limiting slide rail near the fixed clamp handle. When the inner protrusion is below the outer protrusion, the outer protrusion prevents the inner protrusion from lifting. A groove with the same shape as the limiting slide rail is formed between the limiting sidewalls on both sides of the sliding jaw.

[0014] The opening angle of the fixed clamp face cutting edge is 90°-135°.

[0015] This utility model of a vertebral lamina biting forceps has multiple slots and grooves at the end of the forceps bar. The grooves and grooves are connected. The positioning pin enters the groove through the groove. Rotating the forceps bar causes the positioning pin to enter different slots to adjust the biting direction of the clamping assembly, facilitating the biting of dead bone from different angles. The spring force presses the forceps bar against the positioning pin, preventing the positioning pin from disengaging from its slot and ensuring the forceps bar is firmly positioned. The spring applies a force to the guide rod in the direction of the fixed handle, automatically opening the opening of the clamping assembly, thus realizing the opening and closing of the clamping assembly. The section of the forceps bar near the fixed handle is thicker, and the section away from the fixed handle is thinner. The thicker section of the forceps bar facilitates rotation, while the thinner section facilitates operation in narrow hand spaces. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional schematic diagram of the vertebral lamina biting forceps of this utility model;

[0018] Figure 3 A schematic diagram of the rotating clamp handle;

[0019] Figure 4 (a) is a schematic diagram of the structure of the fixed clamp handle and the sleeve. Figure 4 (b) is a cross-sectional view of the fixed clamp handle and sleeve;

[0020] Figure 5 (a) is a structural diagram of the sleeve and locating pin. Figure 5 (b) is a cross-sectional view of the sleeve and locating pin;

[0021] Figure 6 (a) is a schematic diagram of the fixed clamp handle. Figure 6 (b) is a cross-sectional view of the fixed clamp handle;

[0022] Figure 7 Here is a structural schematic diagram of the clamp rod and an enlarged view of part A;

[0023] Figure 8 (a) is a top view of the clamp rod. Figure 8 (b) is Figure 8 (a) View from direction B;

[0024] Figure 9 (a) is Figure 8 (a) Schematic diagram of CC cross section, Figure 8 (b) Figure 8 (c) Figure 8 (d) are respectively Figure 9 (a) Schematic diagram of DD, EE, and FF cross sections;

[0025] Figure 10 (a) is a top view after the guide rod and sliding jaws are connected. Figure 10 (b) is Figure 10 (a) G-direction view, Figure 10 (c) is Figure 10 (b) Schematic diagram of the HH cross section;

[0026] Figure 11 (a)-(d) are schematic diagrams of the opening angle of the cutting edge of the fixed jaw, where α is the opening angle of the cutting edge of the fixed jaw;

[0027] Figure 12 for Figure 2 A schematic diagram of the vertebral lamina biting forceps assembly after rotating 180°, with the sliding jaws beginning to open;

[0028] Figure 13 In order to be in Figure 7 A schematic diagram of a clamp bar structure with a friction part on the clamp bar;

[0029] Figure 14 In order to be in Figure 7 A schematic diagram of another clamp bar structure with a friction part on the clamp bar;

[0030] Figure 15 In order to be in Figure 7 A schematic diagram of a clamp bar structure with a friction part on the clamp bar and an arc-shaped fixed clamp face;

[0031] Figure 16 A schematic diagram of a different type of clamp bar and sliding jaw structure;

[0032] In the diagram: 1. Fixed clamp handle; 11. First hand handle; 12. Connecting part; 13. Slot; 14. First through hole; 2. Rotating clamp handle; 21. Second hand handle; 22. Connecting head; 221. Second through hole; 3. Connecting shaft; 4. Sleeve; 41. Clearance; 5. Clamp bar; 51. Coarse clamp bar section; 511. Slot; 512. Slot gate; 513. Friction part; 52. Fine clamp bar section; 53. Fixed... 54. Fixed jaw; 55. Slide rail section; 56. Slide track; 57. Slide table; 58. Outer protrusion; 59. Guide block; 50. Limiting slide rail; 510. Limiting protrusion; 6. Guide rod; 61. Thick guide rod section; 611. Baffle; 62. Thin guide rod section; 7. Sliding jaw; 71. Limiting side wall; 711. Inner protrusion; 72. Slide groove; 73. Connecting block; 74. Connecting pin; 8. Spring; 9. Positioning pin. Detailed Implementation

[0033] Reference Figure 1-16 A rotatable lamina bone-biting forceps includes a hinged fixed handle 1 and a rotating handle 2. A fixed sleeve 4 is mounted on the fixed handle 1. A rotatable lever 5 is disposed inside the sleeve 4. The lever 5 is inserted into the sleeve 4 from the end away from the fixed handle 1, and the end of the lever 5 away from the fixed handle 1 is located outside the sleeve 4. A guide rod 6 is disposed inside the lever 5 and can slide along the length of the lever 5. A fixed jaw 53 is disposed at the end of the lever 5 away from the fixed handle 1. A sliding jaw 7 is connected to the end of the guide rod 6 away from the fixed handle 1. The fixed jaw 53 and the sliding jaw 7 form a clamping assembly for biting bone. When the clamp bar 5 rotates, the direction of bone biting of the clamping assembly changes accordingly. When the guide rod 6 slides, it drives the sliding jaw 7 to slide synchronously, causing the clamping assembly to open and close for bone biting operation. The sleeve 4 is provided with a positioning pin 9 to prevent the clamp bar 5 from sliding out of the sleeve 4. The positioning pin 9 can also position the clamp bar 5, ensuring that the direction of bone biting of the vertebral plate bone biting forceps remains unchanged during operation. The end of the guide rod 6 near the fixed clamp handle 1 extends from the clamp bar 5 into the sleeve 4. A spring 8 is sleeved on the outside of the section of the guide rod 6 inside the sleeve 4. At least one baffle 611 is provided at the end of the guide rod 6 near the fixed clamp handle 1. Figure 2 , 10As shown, two baffles 611 are provided, although one baffle 611 can also be provided. The diameter of the spring 8 is smaller than the inner diameter of the sleeve 4, and also smaller than the size of the baffle 611 and the cross-sectional size of the section of the guide rod 6 located inside the sleeve 4. The cross-section mentioned in this utility model refers to a plane perpendicular to the length direction of the clamp rod 5. The two ends of the spring 8 abut against the end face of the clamp rod 5 located inside the sleeve 4 and the baffle 611, respectively. The spring 8 applies a spring force to the clamp rod 5 in a direction away from the fixed clamp handle 1, so that the clamp rod 5 abuts tightly against the baffle 611. Positioning shaft 9 positions the clamp bar 5 and applies a spring force to the guide rod 6 towards the fixed clamp handle 1. When the guide rod 6 is only subjected to the spring force of spring 8, it is pushed towards the fixed clamp handle 1, and the clamping assembly is in the open state. The rotating clamp handle 2 is provided with a connector 22, which passes through the fixed clamp handle 1 and enters the sleeve 4. The connector 22 abuts against the baffle 611. When the rotating clamp handle 2 rotates, it drives the guide rod 6 to slide along the length of the clamp bar 5, causing the clamping assembly to open and close, completing the bone-biting operation. The opening angle of the cutting edge of the fixed clamp face 53 is between 90° and 135°. Figure 11 In this context, ∠α represents the opening angle of the cutting edge of the fixed clamp face 53. Figure 11 The opening angles of the fixed jaw 53 cutting edge in (a)-(d) are 90°, 110°, 130° and 135°, respectively.

[0034] Reference Figure 1-10 The fixed clamp handle 1 includes a first hand handle 11 and a connecting part 12, which are integrally formed. A slot 13 is provided at the connection between the first hand handle 11 and the connecting part 12. A first through hole 14 located on the same straight line is provided on the side walls on both sides of the slot 13. A sleeve 4 is fixedly connected to the connecting part 12. A gap 41 communicating with the slot 13 is provided on the sleeve 4. Of course, the connecting part 12 can also be omitted. The first hand handle 11 and the sleeve 4 are integrally formed, and the slot 13 communicates with the sleeve 4. The rotating clamp handle 2 includes a second hand handle 21. A connecting head 22 is fixedly connected to the upper part of the second hand handle 21. A second through hole 221 is provided on the connecting head 22. The connecting head 22 passes through the slot 13 and the gap 41 and enters the sleeve 4. The fixed clamp handle 1 and the rotating clamp handle 2 are hinged by a connecting shaft 3 that passes through the first through hole 14 and the second through hole 221. The connecting shaft 3 can be a gill screw or the like.

[0035] Reference Figure 1-10 13-16 Figure 1-10In the lamina bone-biting forceps shown, the forceps bar 5 includes a coarse forceps bar section 51 and a fine forceps bar section 52. One end of the coarse forceps bar section 51, near the fixed forceps handle 1, is inserted into the sleeve 4, and the other end extends from the sleeve 4 and connects to the fine forceps bar section 52. The end of the fine forceps bar section 52, away from the coarse forceps bar section 51, is connected to the slide rail section 54. The coarse forceps bar section 51, the fine forceps bar section 52, and the slide rail section 54 are integrally formed or fixedly connected. A connecting slide rail 55 is provided for sliding the guide rod 6. The cross-sectional shape of the slide rail section 54 is a part of the cross-section of the thin clamp rod section 52. Specifically, half of the thin clamp rod section 52 can be cut off along the axial direction, and the remaining half serves as the slide rail section 54. The section of the slide rail 55 located between the thick clamp rod section 51 and the thin clamp rod section 52 is located on the axis of the clamp rod 5. The section of the slide rail 54 located in the slide rail section 55 is semi-open. The fixing clamp surface 53 is provided on the slide rail section 54. The sliding jaw 7 slides left and right along the length of the slide rail section 54 at the end away from the fixed clamp handle 1. Of course, the slide rail section 54 can also be designed in other shapes, as long as it can provide a sliding surface for the sliding jaw 7. The advantage of setting the clamp bar 5 with different thicknesses is that when the clamp bar 5 is rotated by hand, the thick clamp bar section 51 or the connection between the thick clamp bar section 51 and the thin clamp bar section 52 is easy to clamp and does not slip. If the clamp bar 5 is too thin, it is not easy to clamp. When biting the bone, the clamping assembly is inserted into the body. The cross-section of this section is small, which is convenient for biting the bone in a narrow operating space and is also conducive to observing the surgical site without obstructing the view. The guide rod 6 includes a thick guide rod section 61 and a thin guide rod section 62. The thick guide rod section 61 is located inside the thick clamp bar section 51, and the corresponding slide rail 55 has a larger cross-section. The thin guide rod section 62 is located inside the thin clamp bar section 52 and on the slide rail section 54, and the corresponding slide rail 55 has a smaller cross-section. The guide rod 6 can also be designed with the same thickness without affecting the use. The slide rail section 54 is provided with a limiting protrusion 510 near the end of the thin clamp bar section 52. When the sliding jaw 7 slides towards the fixed clamp handle 1, it encounters the limiting protrusion 510 and cannot continue to slide towards the fixed clamp handle 1. The slide rail section 54 is provided with a limiting slide rail 59 that limits and guides the sliding jaw 7. The limiting slide rail 59 is provided along the length of the clamp bar 5. The sliding jaw 7 has downwardly extending limiting sidewalls 71 on both sides. The limiting slide rail 59 has sliding tables 56 on both sides for sliding the limiting sidewalls 71. Figure 7-9As shown, a portion of the sliding surface of the slide rail section 54 can be cut off along its length on both sides of the sliding surface of the slide table 56. The remaining portion is the limiting slide rail 59, so the slide table 56 is recessed. The two sides of the limiting slide rail 59 are the slide tables 56. The bottom of the limiting sidewall 71 is provided with an inner protrusion 711. Both sides of the upper part of the limiting slide rail 59 are provided with outer protrusions 57 that block the inner protrusions 711. The outer protrusions 57 do not extend to the section of the limiting slide rail 59 near the fixed clamp handle 1, so that the limiting sidewall 71 of the sliding jaw 7 can be placed on the slide table 56. When the inner protrusion 711 is below the outer protrusion 57, the outer protrusion 57 prevents the inner protrusion 711 from lifting, so that the sliding jaw 7 can only slide along the length of the clamp handle 5, which plays a guiding role and increases the stability during bone biting. A groove 72 with the same shape as the limiting slide rail 59 is formed between the limiting sidewalls 71 on both sides of the sliding jaw 7. Figure 7-9 As shown, a guide block 58 is provided above the limiting slide rail 59. The guide block 58 is in the same length direction as the limiting slide rail 59, but its length is shorter than that of the limiting slide rail 59. When the sliding jaw 7 slides, the upper surface of the slide groove 72 contacts the guide block 58, but does not contact the limiting slide rail 59. The contact area between the sliding jaw 7 and the guide block 58 is small, and the resistance is also small when sliding. Of course, the vertebral plate bone biting forceps can also be used normally without the guide block 58. Figure 13-16 This diagram illustrates four different types of clamp bars 5. Only the external structures of the clamp bars 5, sliding jaws 7, fixed jaws 53, and guide rods 6 are shown; the handles, sleeves 4, and springs 8 are not displayed. The clamping and rotating principles of these four types of clamp bars 5 are similar to... Figure 1-10 The lamina cleaving forceps are the same as those used for bone biting, and will not be described in detail here. Figure 13 The structure of the clamp 5 and Figure 1-10 The 5-barrel of the vertebral laminae bone-cutting forceps is basically the same, the difference being... Figure 13 The outer side of the coarse clamp bar section 5 is provided with a friction part 513. When clamping the clamp bar 5, the friction part 513 is clamped by hand, making the clamping more stable and less prone to slipping. Figure 14 clamp 5 and Figure 1-10 The difference between the clamp bar 5 of the vertebral laminae bone-cutting forceps, besides Figure 14 The clamp bar 5 has a friction part 513 on its outside. Figure 14 The thinner jaw segment 52 of the jaw lever 5 is longer, making it suitable for situations requiring a longer jaw lever 5. Furthermore... Figure 14 Sliding jaws 7 and Figure 1-10 The sliding jaw 7 of the laminar bone-biting forceps operates on the same limiting principle during sliding, but the difference lies in... Figure 14 The sliding jaw 7 surrounds the outer protrusion 57, guide block 58, and limit slide rail 59 within the sliding jaw 7, and does not provide a limit protrusion 510, so that the thin jaw bar segment 52 is close to the end face of the sliding jaw 7 to prevent the sliding jaw 7 from sliding towards the fixed jaw handle 1. Figure 15 clamp 5 and Figure 1-10The difference between the clamp bar 5 of the vertebral laminae bone-cutting forceps, besides Figure 15 The clamp bar 5 has a friction part 513 on its outside. Figure 15 The sliding jaws 7 and the section of the slide rail 54 near the fixed jaws 53 are curved. This clamping assembly is suitable for situations where it is inconvenient to bite bones with straight jaws. Because the sliding jaws 7 are curved, they do not slide in a straight line. A connecting block 73 is provided between the sliding jaws 7 and the guide rod 6. The guide rod 6 is fixedly connected to the connecting block 73. When the guide rod 6 slides, it drives the connecting block 73 to slide synchronously. The connecting block 73 and the sliding jaws 7 are hinged by a connecting pin 74. When the connecting block 73 slides, it drives the sliding jaws 7 to slide synchronously. Because the connecting block 73 is hinged to the sliding jaws 7, the sliding jaws 7 can slide along the curved slide rail 54. Figure 15 The clamp bar 5 is not provided with a limiting protrusion 510, so that the end face of the thin clamp bar segment 52 near the sliding jaw 7 prevents the connecting block 73 from sliding towards the fixed clamp handle 1. Figure 16 clamp 5 and Figure 1-10 The difference in the clamp bar 5 of the laminar bone-biting forceps is that... Figure 16 The jaws 5 and 6 are designed with upper and lower jaws that can slide relative to each other and fit together, instead of using... Figure 1-10 The integrated clamp bar 5, and the main cross-sections of the clamp bar 5 and the sliding jaw 6 are both semi-circular, forming a circle after being fitted together. Figure 16 The clamp bar 5 and the sliding jaw 6 are both formed by two straight rods that are not on the same straight line. The two straight rods are connected by a connecting section, and their shape is similar to "Z". The outer surface of the clamp bar 5 is provided with a friction part 513.

[0036] Reference Figure 1-10 Multiple slots 511 are provided on the outer wall of the coarse clamp bar section 51. The slots 511 are located at the end of the coarse clamp bar section 51 near the fixed clamp handle 1. A connecting channel is provided between the multiple slots 511. The positioning pin 9 can be inserted into different slots 511 through the connecting channel. When the positioning pin 9 is inserted into the slot 511, the clamp bar 5 cannot rotate. The connecting channel is connected to the outside through the slot gate 512. The positioning pin 9 can enter and exit the connecting channel through the slot gate 512. The slots 511 and the slot gate 512 are evenly distributed along the periphery of the clamp bar 5, so that the positioning pin 9 can be inserted into the connecting channel and then disengaged from the connecting channel. When the positioning pin 9 is engaged in the adjacent slot 511, the clamp rod 5 rotates at the same angle. The positioning pin 9 is detachably connected to the sleeve 4. After removing the positioning pin 9, the clamp rod 5 and guide rod 6 can be taken out of the sleeve 4 for easy cleaning. The positioning pin 9 can be installed on the side wall of the sleeve 4 by means of threaded connection for easy disassembly and assembly. Of course, the positioning pin 9 can also be fixedly installed. A notch is made in the baffle 611 through which the positioning pin 9 can pass to take out the guide rod 6 from the sleeve 4. Of course, the clamp rod 5 and guide rod 6 can also be cleaned and disinfected without being removed.

[0037] It should be noted that the above-mentioned terms such as "up," "down," "left," and "right" are used to describe the lamina bone-biting forceps shown in the attached drawings and do not limit the structure of the lamina bone-biting forceps of this utility model.

[0038] Work process: Figure 1-10 The following describes the use of a laminar bone-biting forceps. The slot 512 is aligned with the positioning pin 9. The end of the forceps bar 5, with the slot 511, is inserted into the sleeve 4. The positioning pin 9 enters the connecting channel between the slots 511 through the slot 512. Depending on the orientation of the bone being bitten, the positioning pin 9 is inserted into the appropriate slot 511. Under the elastic force of the spring 8, the forceps bar 5 is pressed against the positioning pin 9, and the positioning pin 9 is engaged in the slot 511. The position of the forceps bar 5 is determined. The spring 8 applies elastic force to the baffle 611 towards the fixed forceps handle 1, pushing the guide rod 6 along with the sliding jaw 7 towards the fixed forceps handle 1. At this time, the clamping assembly is in the open state. When biting the bone, the forceps handle 2 is rotated by hand. The connecting head 22 applies a pushing force to the baffle 611 away from the fixed forceps handle 1, pushing the guide rod 6 along with the sliding jaw 7 away from the fixed forceps handle 1. As the clamping assembly slides, the opening gradually closes. The sliding jaws 7 move to bite the bone. After the operation, the external force applied to the rotating handle 2 is released, and the spring 8 pushes the baffle 611 towards the fixed handle 1, returning the sliding jaws 7 to the open state. During the surgery, if the direction of the clamping assembly's bone-biting needs to be adjusted, hold the thicker clamp rod segment 51 or the connection between the thicker clamp rod segment 51 and the thinner clamp rod segment 52 by hand, and push the clamp rod 5 towards the fixed handle 1. This causes the positioning pin 9 to disengage from its slot 511 and enter the connecting channel. Rotate the clamp rod 5. When the bone-biting orientation of the clamping assembly is appropriate, release your hand. Under the elastic force of the spring 8, the slot 511 facing the positioning pin 9 will engage with the positioning pin 9, achieving rotational positioning of the clamp rod 5 and completing the adjustment of the clamping assembly's bone-biting direction. Then, the bone-biting operation can be performed. After the surgery, the positioning pin 9 can be removed, and the clamp rod 5 and guide rod 6 can be taken out of the sleeve 4. The vertebral laminar bone-biting forceps should be cleaned and disinfected.

[0039] The lamina bone-biting forceps of this invention use a positioning pin in the sleeve and a slot on the forceps bar to position the forceps bar. Rotating the forceps bar causes different slots to engage with the positioning pin, thereby adjusting the direction of bone biting of the clamping assembly. The operation is simple and convenient, facilitating the biting of dead bone from the interosseous sidewall and other locations, and adjusting the direction of use of the lamina bone-biting forceps. The forceps bar includes a thick forceps bar section and a thin forceps bar section. The thick forceps bar section facilitates the rotation and adjustment of the direction of bone biting of the forceps bar and the clamping assembly, while the thin forceps bar section is close to the clamping assembly, making it easy to observe the bone biting operation.

Claims

1. A rotatable lamina bone-biting forceps, comprising a fixed forceps handle (1), said fixed forceps handle (1) being hinged to a rotating forceps handle (2), and further comprising a clamping assembly for biting bone, characterized in that: The fixed clamp handle (1) is provided with a fixed sleeve (4), and the rotating clamp handle (2) is provided with a connector (22). The connector (22) passes through the fixed clamp handle (1) and enters the sleeve (4). The sleeve (4) is provided with a positioning pin (9) to prevent the clamp rod (5) from sliding out of the sleeve (4). One end of the clamp rod (5) is inserted into the sleeve (4). The clamp rod (5) is rotated to adjust the angle when clamping the combined bone bite. The clamp rod (5) is positioned by the positioning pin (9). The clamp rod (5) is provided with a sliding guide rod (6). The end of the clamp rod (5) away from the fixed clamp handle (1) is provided with a fixed clamping surface (53). The guide rod (6) away from the fixed clamp handle (1) is provided with a fixed clamping surface (53). The end is connected to a sliding jaw (7). The fixed jaw (53) and the sliding jaw (7) form a clamping assembly for biting bones. The end of the guide rod (6) near the fixed jaw handle (1) extends from the jaw bar (5) into the sleeve (4). A spring (8) is sleeved on the outside of the section of the guide rod (6) located inside the sleeve (4). At least one baffle (611) is provided at the end of the guide rod (6) near the fixed jaw handle (1). The two ends of the spring (8) abut against the end face of the jaw bar (5) located inside the sleeve (4) and the baffle (611), respectively. The connector (22) abuts against the baffle (611). When the rotating jaw handle (2) rotates, it drives the guide rod (6) to slide along the length direction of the jaw bar (5).

2. The rotatable laminectomy rongeur of claim 1, wherein: The fixed clamp handle (1) includes a first hand handle (11) and a connecting part (12). The sleeve (4) is fixedly connected to the connecting part (12). A slot (13) is provided at the connection between the first hand handle (11) and the connecting part (12). A gap (41) communicating with the slot (13) is provided on the sleeve (4). The rotating clamp handle (2) includes a second hand handle (21). The upper part of the second hand handle (21) is fixedly connected to the connecting head (22). The connecting head (22) passes through the slot (13) and the gap (41) and enters the sleeve (4).

3. The rotatable laminectomy rongeur of claim 1, wherein: The clamp bar (5) includes a thick clamp bar section (51) and a thin clamp bar section (52). The end of the thick clamp bar section (51) near the fixed clamp handle (1) is inserted into the sleeve (4). The end of the thin clamp bar section (52) away from the thick clamp bar section (51) is connected to the slide rail section (54) with a slide table (56). The thick clamp bar section (51), the thin clamp bar section (52), and the slide rail section (54) are provided with a connecting slide rail (55) for the guide rod (6) to slide. The fixed clamp face (53) is located at the end of the slide rail section (54) away from the fixed clamp handle (1). The sliding jaw (7) slides along the length direction of the slide rail section (54).

4. The rotatable laminectomy rongeur of claim 3, wherein: The slide rail section (54) is provided with a limiting protrusion (510) to prevent the sliding jaw (7) from sliding towards the fixed jaw (1). The limiting protrusion (510) is located at the end of the slide rail section (54) near the thin jaw bar section (52).

5. The rotatable laminectomy rongeur of claim 3, wherein: The outer wall of the coarse clamp bar section (51) is provided with multiple slots (511) into which the positioning pin (9) can be inserted. The slots (511) are located at the end of the coarse clamp bar section (51) near the fixed clamp handle (1). After the positioning pin (9) is inserted into the slot (511), the clamp bar (5) cannot rotate. A connecting channel is provided between the multiple slots (511). The connecting channel is connected to the outside through the slot gate (512). The positioning pin (9) can pass through the connecting channel and the slot gate (512).

6. The rotatable laminectomy rongeur of claim 5, wherein: The slots (511) and the gates (512) are evenly distributed around the periphery of the clamp (5).

7. The rotatable laminectomy rongeur of claim 1, wherein: The positioning pin (9) is detachably connected to the sleeve (4).

8. The rotatable laminectomy rongeur of claim 1, wherein: The outer surface of the clamp (5) is provided with a non-slip friction part (513).

9. The rotatable laminectomy rongeur of claim 3, wherein: The slide rail section (54) is provided with a limiting slide rail (59) arranged along the length direction of the clamp bar (5). The sliding jaw (7) is provided with downwardly extending limiting sidewalls (71) on both sides. The limiting slide rail (59) has sliding tables (56) on both sides for sliding the limiting sidewalls (71). The bottom of the limiting sidewalls (71) is provided with an inner protrusion (711). The upper sides of the limiting slide rail (59) are provided with outer protrusions (57). The outer protrusions (57) do not extend to the section of the limiting slide rail (59) near the fixed clamp handle (1). When the inner protrusion (711) is below the outer protrusion (57), the outer protrusion (57) prevents the inner protrusion (711) from lifting. The limiting sidewalls (71) on both sides of the sliding jaw (7) form a groove (72) with the same shape as the limiting slide rail (59).

10. The rotatable laminectomy rongeur according to claim 1, wherein: The opening angle of the cutting edge of the fixed clamping face (53) is 90°-135°.

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