Detachable vertebral plate rongeur

Abstract

The utility model relates to the technical field of medical instruments, and particularly discloses a detachable vertebral plate rongeur which comprises a fixed handle and a rotating handle which are hinged, the fixed handle is connected with a lower rongeur rod, the rotating handle drives an upper rongeur rod to slide when rotating, a first limiting sliding block is arranged on the upper rongeur rod, and a first limiting sliding groove is formed in the lower rongeur rod. The first limiting sliding block slides in the first limiting sliding groove, when the first limiting sliding block is close to the forceps mouth, the upper forceps rod and the lower forceps rod cannot be separated, and when the first limiting sliding block is close to the fixed handle, the upper forceps rod and the lower forceps rod can be separated; a rotatable limiting key is arranged on the upper forceps rod and is close to the hinged portion of the fixed handle and the rotating handle, and the rotating limiting key controls the rotating angle of the rotating handle. The sliding distance of the upper forceps rod is controlled through the limiting key, so that whether the upper forceps rod and the lower forceps rod can be separated or not is controlled, the upper forceps rod and the lower forceps rod cannot be separated during an operation, the upper forceps rod and the lower forceps rod can be separated during cleaning and disinfection, disinfection is thorough, and infection caused by repeated use is avoided.

Description

Technical Field

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

[0002] A laminar bone-biting forceps is an orthopedic surgical tool primarily used in spinal surgery to bite and harvest vertebral laminae, articular process bone, or trim bone stumps. It typically consists of a fixed handle, a rotating handle, an upper clamp, and a lower clamp. The ends of the upper and lower clamps form a clamping assembly. The fixed and rotating handles are hinged, and the fixed handle and lower clamp are fixedly connected or integrally formed. Rotating the rotating handle causes the upper clamp to slide along the length of the lower clamp, thus achieving the bone-biting process. After use, blood may remain in the upper and lower clamps, as well as in the gap between them. Because existing laminar bone-biting forceps are not detachable, there is a risk of incomplete disinfection of the gap between the upper and lower clamps during postoperative cleaning and disinfection, leading to a potential risk of cross-infection during repeated use. Utility Model Content

[0003] This invention addresses the problem of incomplete disinfection during postoperative cleaning and sterilization caused by the non-removable lamina bone biting forceps by providing a detachable lamina bone biting forceps with separate upper and lower forceps.

[0004] To solve the above-mentioned technical problems, this utility model includes a hinged fixed handle and a rotating handle. The fixed handle is connected to a lower clamp bar. Above the lower clamp bar, there is an upper clamp bar that fits against the upper surface of the lower clamp bar and can slide along the length of the lower clamp bar. The lower clamp bar has jaws, which are located at the end of the lower clamp bar away from the fixed handle. The end of the upper clamp bar away from the fixed handle forms a clamping combination with the jaws. When the rotating handle is rotated, it drives the upper clamp bar to slide. When the angle between the rotating handle and the fixed handle increases, the upper clamp bar slides closer to the fixed handle. Its structural feature is that the lower surface of the upper clamp bar has a first limiting slider, and the upper surface of the lower clamp bar has a first limiting slider. The first limiting groove of the block is used to slide the first limiting slider. When the first limiting slider is close to the jaws, the upper and lower jaws cannot be separated. When the first limiting slider is close to the fixed handle, the upper and lower jaws can be separated. The upper jaw is provided with a rotatable limiting key. The limiting key is located near the hinge of the fixed handle and the rotating handle. During surgery, the limiting key restricts the rotation angle of the rotating handle. The first limiting slider cannot slide to the position close to the fixed handle in the first limiting groove. When the vertebral plate bone biting forceps are cleaned and disinfected, the limiting key is rotated to increase the rotation angle of the rotating handle, and the first limiting slider can slide to the position close to the fixed handle in the first limiting groove.

[0005] With the above structure, during surgery, rotating the handle causes the upper clamp to slide along the length of the lower clamp. The clamping combination formed by the jaws of the upper and lower clamps closes and opens, allowing for the biting and releasing of bone during surgery. Due to the limiting action of the limiting key, the rotation angle of the handle is restricted, thus limiting the sliding distance of the upper clamp along the lower clamp. The sliding distance of the first limiting slider in the first limiting groove is also limited, preventing it from sliding close to the fixed handle. Therefore, the first limiting slider can only slide at a position far from the fixed handle. Under the limiting action of the first limiting groove and the first limiting slider, the upper and lower clamps cannot separate, allowing them to enter and exit through the narrow surgical hole, and making the clamping of the bone-biting forceps more stable during surgery. When cleaning and disinfecting the bone-biting forceps after surgery, rotating the limit key releases the restriction on the rotation angle of the handle. As the rotation angle of the handle increases, the upper forceps slides a greater distance along the lower forceps, and the first limit slider slides a greater distance in the first limit groove. The first limit slider can then slide close to the fixed handle. At this point, the restriction between the first limit slider and the first limit groove is released, allowing the upper and lower forceps to separate. This enables thorough cleaning and disinfection of the gap between the upper and lower forceps, reducing the chance of bacteria surviving on the bone-biting forceps and minimizing the risk of infection for the patient during subsequent surgeries.

[0006] The fixed handle includes a first gripping part and a connecting section. The connecting section is inserted into the end of the lower clamp bar away from the jaws. The rotating handle is driven by the upper clamp bar through a guide rod. The lower surface of the guide rod is in contact with the upper surface of the connecting section. One end of the guide rod is inserted into the end of the upper clamp bar away from the jaws. The other end of the guide rod is hinged to the rotating handle. When the rotating handle is rotated, it drives the guide rod to slide along the length of the connecting section, thereby driving the upper clamp bar to slide synchronously.

[0007] The insertion direction of the connecting section and the lower clamp rod is different from the insertion direction of the guide rod and the upper clamp rod.

[0008] The insertion direction of the connecting section and the lower clamp is perpendicular to the insertion direction of the guide rod and the upper clamp.

[0009] The lower surface of the guide rod is provided with a second limiting slider, and the upper surface of the connecting section is provided with a second limiting groove for limiting the second limiting slider. The second limiting slider slides in the second limiting groove. When the second limiting slider is close to the jaws, the connecting section and the guide rod cannot be separated. When the second limiting slider is close to the fixed handle, the connecting section and the guide rod can be separated.

[0010] The rotating handle includes a second grip and a connector. The connecting section has a first slot at the hinge of the fixed handle and the rotating handle. The guide rod has a second slot communicating with the first slot. The connector is inserted into the first slot and the second slot. The connector has a communicating groove communicating with the outside. The guide rod is hinged to the rotating handle by a connecting pin that passes through the guide rod and the communicating groove.

[0011] The upper part of the second gripping part is provided with a hollow column that can be inserted into the second gripping part. The hollow column is located on the side of the second gripping part away from the first gripping part. The second gripping part is also provided with a limiting pin to prevent the hollow column from coming out of the second gripping part and to restrict the rotation of the hollow column. The outer end of the hollow column is provided with a side blocking plate. The side blocking plate has a fourth through hole. The limiting key includes a rectangular limiting block. The side of the rectangular limiting block is connected to a connecting column that can pass through the fourth through hole. The connecting column is connected with an anti-detachment plate to prevent the connecting column from coming out of the hollow column through the fourth through hole. The side of the rectangular limiting block is also provided with a connecting key. The hollow column has a keyway that allows the connecting key to be tightly inserted and pulled out. When the connecting key is inserted into the keyway, the outer contour of the rectangular limiting block is closest to the connecting section.

[0012] The lower clamp bar has an upwardly protruding limiting slide rail on its upper surface, which extends along the length of the lower clamp bar. The upper clamp bar has downwardly extending side limiting walls on both sides of its lower surface. A third limiting groove with the same cross-sectional shape as the limiting slide rail is formed between the two side limiting walls. The side limiting walls slide along the limiting slide rail with the upper clamp bar. When the side limiting walls slide to a position close to the jaws, the limiting slide rail limits the side limiting walls, and the upper and lower clamp bars cannot be separated. When the side limiting walls slide to a position close to the fixed handle, the limiting slide rail does not limit the side limiting walls, and the upper and lower clamp bars can be separated.

[0013] The upper surface of the limiting slide rail is provided with a limiting boss that positions the upper clamp bar as it slides towards the clamp jaws.

[0014] The opening angle of the cutting edge of the pliers (101) is 90-135°.

[0015] This utility model relates to a detachable laminar bone-biting forceps. The upper and lower forceps are connected by a limiting slider and a limiting groove. The guide rod and connecting section are also connected by a limiting slider and a limiting groove. During surgery, the connecting key is inserted into the keyway, with the outer contour of the rectangular limiting block closest to the connecting section. Rotating the rotating handle increases the angle between the rotating handle and the fixed handle. When a certain angle is reached, the rectangular limiting block abuts against the connecting section, preventing further rotation of the rotating handle. At this point, the upper forceps, guide rod, and limiting slider cannot slide further towards the fixed handle. Under the action of the limiting groove and limiting slider, the upper and lower forceps cannot separate, the guide rod and connecting section cannot separate, and the limiting slide rail and side limiting wall between the upper and lower forceps cannot separate. During surgery, the upper and lower forceps remain in contact, allowing the forceps to pass through narrow surgical holes and ensuring the stability of the bone-biting operation. The limiting slide rail and side limiting wall between the upper and lower forceps, in addition to... In addition to preventing the forceps from separating, it also helps to keep the upper forceps from deviating in the sliding direction. When cleaning and disinfecting the bone forceps after surgery, the connecting key is pulled out of the keyway, and the limiting key is rotated to increase the distance between the outer contour of the rectangular limiting block and the connecting section. The handle can continue to rotate. After rotating a certain distance, the restrictions of the limiting slider and the limiting groove are released, as are the restrictions of the limiting rail and the side limiting wall. At this time, the upper forceps and the lower forceps are separated, and the connecting section is separated from the guide rod. The bone forceps are then thoroughly cleaned and disinfected to reduce the chance of bacteria survival. The upper forceps and the guide rod, and the lower forceps and the connecting section are connected by a plug-in method, and the plugging direction is perpendicular, which increases the strength of the connection. When the two forceps are subjected to external forces in any direction, the connection will not separate or bend or deviate. The upper forceps and the lower forceps are the main parts that come into contact with the inside of the human body and are subject to more contamination and corrosion. Replacement can be done by replacing only the upper forceps and the lower forceps, saving surgical costs. Attached Figure Description

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

[0017] Figure 2 This is a schematic diagram of the rotating handle;

[0018] Figure 3 This is a schematic diagram of the structure for fixing the handle;

[0019] Figure 4 (a) is a top view of the fixed handle. Figure 4 (b) is Figure 4 (a) Schematic diagram of AA section;

[0020] Figure 5 (a) is Figure 4 (a) BB cross-section schematic diagram, Figure 5 (b) is Figure 4 (a) Schematic diagram of CC cross section;

[0021] Figure 6 This is a schematic diagram of the lower clamp rod.

[0022] Figure 7 (a) is a top view of the lower clamp bar. Figure 7 (b) is Figure 7 (a) View from direction F, Figure 7 (c) is Figure 7 (a) Schematic diagram of DD cross section, Figure 7 (d) is Figure 7 (a) Schematic diagram of the EE cross section;

[0023] Figure 8 This is a schematic diagram of the guide rod structure;

[0024] Figure 9 (a) is a top view of the guide rod. Figure 9 (b) is Figure 9 (a) G-direction view, Figure 9 (c) is Figure 9 (b) is a schematic diagram of the HH cross-section. Figure 9 (d) is Figure 9 (b) Schematic diagram of section II;

[0025] Figure 10 This is a schematic diagram of the upper clamp bar.

[0026] Figure 11 (a) is a top view of the upper clamp bar. Figure 11 (b) is Figure 11 (a) J-direction view, Figure 11 (c) is Figure 11 (b) is a schematic diagram of the KK cross-section. Figure 11 (d) is Figure 11 (b) LL cross-section schematic diagram;

[0027] Figure 12 (a) is a schematic diagram of the assembly of the limit key, hollow column, and limit pin. Figure 12 (b) is a cross-sectional view of the limit key and hollow column, and a structural diagram of the limit key, hollow column and limit pin after assembly;

[0028] Figure 13 (a)-(d) are schematic diagrams of the opening angle of the pliers' jaws, where α is the opening angle of the pliers' jaws.

[0029] Figure 14 This is a schematic diagram illustrating the process of separating the vertebral lamina bone-biting forceps of this utility model;

[0030] In the diagram: 1. Fixed handle; 11. First grip; 12. Connecting section; 121. First slot; 122. First through hole; 123. Second limiting slide groove; 124. First horizontal plug; 125. First horizontal slot; 126. First slide table; 127. First inner protrusion; 128. Second inner protrusion; 2. Rotating handle; 21. Second grip; 211. Mounting hole; 212. Second through hole; 22. Connector; 221. Third through hole; 222. Connecting groove; 3. Limiting key; 31. Rectangular limiting block; 311. Connecting key; 32. Connecting post; 321. Anti-detachment plate; 4. Limiting pin; 5. Hollow post; 51. Side blocking plate; 511. Fourth through hole; 512. Keyway; 52. Recess; 6. Connecting shaft; 7. 8. Connecting pin; 8. Guide rod; 81. Second slot; 82. Third limiting slider; 821. First outer protrusion; 83. Fifth through hole; 84. Second limiting slider; 841. Second outer protrusion; 85. First vertical plug; 86. First vertical slot; 9. Upper clamp bar; 91. Second vertical plug; 92. Second vertical slot; 93. First limiting slider; 931. Third outer protrusion; 94. Side limiting wall; 941. Third inner protrusion; 95. Third limiting slide groove; 10. Lower clamp bar; 101. Clamping jaw; 102. Second horizontal plug; 103. Second horizontal slot; 104. First limiting slide groove; 105. Limiting slide rail; 106. Second slide table; 107. Fourth outer protrusion; 108. Limiting boss; 109. Fourth inner protrusion. Detailed Implementation

[0031] Reference Figure 1-14A detachable laminar bone-biting forceps includes a fixed handle 1 and a rotating handle 2, which are hinged together. The fixed handle 1 is connected to a lower forceps bar 10. An upper forceps bar 9 is provided above the lower forceps bar 10 and fits against its upper surface. The upper forceps bar 9 can slide along the length of the lower forceps bar 10. A jaw 101 is provided at the end of the lower forceps bar 10. The ends of the upper forceps bar 9 and the lower forceps bar 10 refer to the ends away from the fixed handle 1, which are also the parts inserted into the surgical hole to clamp the bone. The end of the upper clamp bar 9 forms a clamping combination with the jaws 101. When the handle 2 is rotated, the upper clamp bar 9 slides. When the angle between the rotating handle 2 and the fixed handle 1 increases, the upper clamp bar 9 slides towards the fixed handle 1, that is, away from the jaws 101. The lower surface of the upper clamp bar 9 is provided with a first limiting slider 93, and the upper surface of the lower clamp bar 10 is provided with a first limiting groove 104. The first limiting slider 93 can slide within the first limiting groove 104. The limiting action between block 93 and the first limiting slide groove 104 controls whether the upper clamp rod 9 and the lower clamp rod 10 can be separated. When the first limiting slider 93 slides to the position close to the fixed handle 1, the upper clamp rod 9 and the lower clamp rod 10 can be separated. When the first limiting slider 93 slides to the position close to the clamp mouth 101, the upper clamp rod 9 and the lower clamp rod 10 cannot be separated. The upper clamp rod 9 is provided with a rotatable limiting key 3, which is located near the hinge of the fixed handle 1 and the rotating handle 2. Rotating the limiting key 3 controls the rotation angle of the rotating handle 2, thereby controlling the sliding distance of the upper clamp rod 9 and the first limiting slider 93. During surgery, the limiting key 3 restricts the rotation angle of the rotating handle 2, so that the first limiting slider 93 cannot slide to the position close to the fixed handle 1 within the first limiting slide groove 104. After surgery, when cleaning and disinfecting the vertebral plate bone biting forceps, rotating the limiting key 3 increases the rotation angle of the rotating handle 2, allowing the first limiting slider 93 to slide to the position close to the fixed handle 1 within the first limiting slide groove 104. Figure 6 , 7 As shown in Figures 10 and 11, the bottom sides of the first limiting slider 93 are provided with third external protrusions 931, and the upper sides of the first limiting groove 104 are provided with fourth internal protrusions 109 that block the third external protrusions 931. The fourth internal protrusions 109 are located near the jaws 101. No protrusions are provided in the first limiting groove 104 near the fixed handle 1 to prevent the first limiting slider 93 from disengaging. Therefore, when the first limiting slider 93 slides to the position near the fixed handle 1, it can disengage from the first limiting groove 104, at which point the upper jaw 9 and lower jaw 10 separate. When the first limiting slider 93 slides to the position near the jaws 101, the fourth internal protrusions 109 prevent it from disengaging from the first limiting groove 104, and the upper jaw 9 and lower jaw 10 cannot separate. The cutting edge opening angle of the jaws 101 is between 90° and 135°. Figure 13 In this context, ∠α represents the opening angle of the cutting edge of the jaws 101. Figure 13 The opening angles of the cutting edge of the jaw 101 in (a)-(d) are 90°, 110°, 130° and 135°, respectively.

[0032] Reference Figure 1-14 The fixed handle 1 includes an integrally formed first gripping part 11 and a connecting section 12. The connecting section 12 is inserted into the end of the lower jaw bar 10 away from the jaw 101. The rotating handle 2 is driven by the guide rod 8 to the upper jaw bar 9. One end of the guide rod 8 is hinged to the rotating handle 2, and the other end is inserted into the end of the upper jaw bar 9 away from the jaw 101. The lower surface of the guide rod 8 is in contact with the upper surface of the connecting section 12. When the rotating handle 2 is rotated, it drives the guide rod 8 to slide left and right along the length direction of the connecting section 12, thereby driving the upper jaw bar 9 to slide synchronously. The connection between the connecting section 12 and the lower jaw bar 10, and the connection between the guide rod 8 and the upper jaw bar 9, are all made by insertion. This is the section inserted into the surgical site, coming into contact with blood, tissues, bones, and other parts of the human body. It is subject to significant contamination and corrosion. When it needs to be replaced after a certain number of uses, only the upper clamp 9 and lower clamp 10 need to be replaced, saving on surgical instrument costs. As shown in the figure, the insertion direction between the connecting section 12 and the lower clamp 10 is different from the insertion direction between the guide rod 8 and the upper clamp 9. In the figure, the insertion direction of the connecting section 12 and the lower clamp 10 is perpendicular to the insertion direction of the guide rod 8 and the upper clamp 9. Specifically, the upper clamp 9 and the guide rod 8 are connected vertically. The end of the upper clamp 9 has a second vertical plug 91 and a second vertical slot 92. The guide rod 8 has a connection point located at the upper clamp 9. The first vertical plug 85 and the first vertical slot 86 are provided at the end. When connected, the first vertical plug 85 is tightly inserted into the second vertical slot 92, and the second vertical plug 91 is tightly inserted into the first vertical slot 86. In the figure, the lower clamp 10 and the connecting section 12 are connected by left and right insertion. The end of the lower clamp 10 is provided with a second horizontal plug 102 and a second horizontal slot 103. The connecting section 12 is provided with a first horizontal plug 124 and a first horizontal slot 125 located at the connection end with the lower clamp 10. When connected, the first horizontal plug 124 is tightly inserted into the second horizontal slot 103, and the second horizontal plug 102 is tightly inserted into the first horizontal slot 125. Different insertion directions can increase the clamp bar's... When used for stability, if the upper clamp 9 is inserted into the guide rod 8 from left to right and the lower clamp 10 is inserted into the connecting section 12 from left to right, the upper clamp 9 and the lower clamp 10 are in contact. When the upper clamp 9 and the lower clamp 10 are simultaneously subjected to an external force to the left, the upper clamp 9 and the lower clamp 10 may simultaneously detach from the guide rod 8 and the connecting section 12. When a connection method with a perpendicular insertion direction is used, the clamps will not detach. Of course, the insertion direction can also be reversed, such as the lower clamp 10 being inserted into the connecting section 12 from left to right and the upper clamp 9 being inserted into the guide rod 8 from right to left. The advantage of a perpendicular insertion direction is that it is easy to distinguish which two rods are to be inserted, and it is not easy to insert them incorrectly.

[0033] Reference Figure 1-14The upper surface of the lower clamp 10 is provided with an upwardly protruding limiting slide rail 105. The limiting slide rail 105 is arranged along the length direction of the lower clamp 10 and is located in the middle of the width direction of the lower clamp 10. Both sides of the lower surface of the upper clamp 9 are provided with downwardly extending side limiting walls 94. The two side limiting walls 94 are located on both sides of the limiting slide rail 105. The cavity formed between the side limiting walls 94 is a third limiting groove 95 with the same cross-sectional shape as the limiting slide rail 105. The cross-section refers to the cross-section perpendicular to the length direction of the clamp. The side limiting wall 94 slides along the limiting slide rail 105 with the upper clamp bar 9. When the side limiting wall 94 slides to a position close to the clamp jaw 101, the limiting slide rail 105 limits the side limiting wall 94, preventing the upper clamp bar 9 from separating from the lower clamp bar 10. When the side limiting wall 94 slides to a position close to the fixed handle 1, the limiting slide rail 105 does not limit the side limiting wall 94, allowing the upper clamp bar 9 and the lower clamp bar 10 to separate. Specifically, the upper sides of the limiting slide rail 105 are provided with the first... The fourth external protrusion 107 is shorter than the limiting slide rail 105. The limiting slide rail 105 has no external protrusion near the fixed handle 1. A second slide 106 is formed below the fourth external protrusion 107. A third internal protrusion 941 is provided at the bottom of the side limiting wall 94. During the operation, the third internal protrusion 941 is located below the fourth external protrusion 107. The fourth external protrusion 107 limits the third internal protrusion 941. The upper clamp rod 9 and the lower clamp rod 10 cannot be separated. The vertebral laminae bone biting forceps are cleaned and disinfected. When the side limiting wall 94 slides to a position close to the fixed handle 1, the fourth outer protrusion 107 does not limit the third inner protrusion 941, allowing the upper clamp bar 9 and the lower clamp bar 10 to separate. The limiting slide rail 105 and the side limiting wall 94, in addition to restricting the separation of the upper clamp bar 9 and the lower clamp bar 10, also guide the sliding direction of the upper clamp bar 9, ensuring that the upper clamp bar 9 can only slide along the length direction of the lower clamp bar 10. This prevents the upper clamp bar 9 and the lower clamp bar 10 from misaligning, enhancing the clamping stability of the clamping assembly. Figure 6 , 7 As shown, the upper surface of the limiting slide rail 105 is provided with a limiting boss 108 for positioning the upper clamping bar 9 to slide to the end position in the direction of the clamping jaw 101. When the clamping end of the upper clamping bar 9 approaches the clamping jaw 101, the upper clamping bar 9 cannot continue to slide in the direction of the clamping jaw 101 due to the blocking effect of the limiting boss 108. Specifically, the limiting boss 108 is located in the cavity of the third limiting slide groove 95. The end of the cavity where the limiting boss 108 is located is the blocking point near the fixed handle 1. After the blocking point touches the limiting boss 108, the upper clamping bar 9 cannot continue to slide in the direction of the clamping jaw 101. Of course, other limiting methods can also be used. For example, if the limiting boss 108 is not provided, an inner protrusion is provided at the end of the side limiting wall 94 near the fixed handle 1. When the inner protrusion touches the fourth outer protrusion 107 during the sliding process of the upper clamping bar 9, the upper clamping bar 9 cannot continue to slide in the direction of the clamping jaw 101.

[0034] Reference Figure 1-14 Similar to the limiting method between the upper jaw bar 9 and the lower jaw bar 10, the guide rod 8 and the connecting section 12 are separated by a limiting slider and a limiting groove. The lower surface of the guide rod 8 is provided with a second limiting slider 84, and the upper surface of the connecting section 12 is provided with a second limiting groove 123. The second limiting slider 84 can slide within the second limiting groove 123. The limiting effect between the second limiting slider 84 and the second limiting groove 123 controls whether the guide rod 8 and the connecting section 12 can separate. When the second limiting slider 84 slides to a position close to the fixed handle 1, the guide rod 8 and the connecting section 12 can separate; when the second limiting slider 84 slides to a position close to the jaw 101, the guide rod 8 and the connecting section 12 cannot separate. Specifically, the second limiting slider 84... The bottom sides are provided with second external protrusions 841, and the upper sides of the second limiting slide groove 123 are provided with first internal protrusions 127 that block the second external protrusions 841. The first internal protrusions 127 are located near the jaws 101. The second limiting slide groove 123 is not provided with a protrusion to prevent the second limiting slider 84 from disengaging near the fixed handle 1. Therefore, when the second limiting slider 84 slides to the position near the fixed handle 1, the second limiting slider 84 can disengage from the second limiting slide groove 123. At this time, the guide rod 8 and the connecting section 12 separate. When the second limiting slider 84 slides to the position near the jaws 101, the first internal protrusions 127 prevent the second limiting slider 84 from disengaging from the second limiting slide groove 123. At this time, the guide rod 8 and the connecting section 12 cannot be separated.

[0035] Reference Figure 1-14The rotating handle 2 includes a second gripping part 21 and a connector 22. A first slot 121 is provided on the connecting section 12, which is located at the hinge of the fixed handle 1 and the rotating handle 2. A second slot 81 is provided on the guide rod 8, which communicates with the first slot 121. The connector 22 is inserted into the first slot 121 and the second slot 81. A first through hole 122 located on the same straight line is provided on the side walls on both sides of the first slot 121. A third through hole 221 is provided on the connector 22. The fixed handle 1 and the rotating handle 2 are hinged by a connecting shaft 6 that passes through the first through hole 122 and the third through hole 221. The connecting shaft 6 can be made of gill screws, etc. The guide rod 8 is hinged to the rotating handle 2 by a connecting pin 7 that passes through the guide rod 8 and the connecting groove 222. Specifically, the side walls on both sides of the second slot 81 are provided with a fifth through hole 83 located on the same straight line. The connector 22 is provided with a connecting groove 222 that communicates with the outside. The connecting pin 7 passes through the fifth through hole 83 and the connecting groove 222. When the connector 22 rotates, the guide rod 8 is driven to slide through the connecting pin 7. When cleaning and disinfecting, the connecting pin 7 can slide out from the connecting groove 222 after the guide rod 8 and the connecting section 12 are separated, so as to disassemble the vertebral plate biting forceps. A guide structure to prevent detachment is provided between the first slot 121 and the second slot 81. Specifically, the bottom of the sidewalls on both sides of the second slot 81 is provided with a downwardly extending third limiting slider 82. The bottom of the third limiting slider 82 is provided with a first external protrusion 821, which is arranged along the length of the guide rod 8. A first slide 126 is provided on the sidewalls on both sides of the first slot 121. The first slide 126 is located on the upper part of the sidewall of the first slot 121 and is arranged along the length of the guide rod 8. Above the first slide 126 is a second internal protrusion 128 that limits the first external protrusion 821. The second inner protrusion 128 is located at the top of the side walls of the first slot 121 and is set along the length of the guide rod 8. The third limiting slider 82 slides on the first slide 126. During the operation, the first outer protrusion 821 is located below the second inner protrusion 128. The guide rod 8 cannot be separated from the connecting section 12, and the guide rod 8 can only slide along the length of the connecting section 12, which improves the stability of the bone biting operation during the operation. When the vertebral plate bone biting forceps are cleaned and disinfected, the first outer protrusion 821 slides out from the first slot 121, the restriction of the second inner protrusion 128 on the first outer protrusion 821 is released, and the guide rod 8 can be separated from the connecting section 12.

[0036] Reference Figure 1-14The upper part of the second gripping part 21 is provided with a mounting hole 211, and a second through hole 212 is also provided on the second gripping part 21. The axis of the mounting hole 211 is perpendicular to the axis of the second through hole 212, and the second through hole 212 and the mounting hole 211 partially overlap. Of course, the axis of the mounting hole 211 and the axis of the second through hole 212 do not have to be perpendicular, as long as the space partially overlaps. A hollow column 5 is installed in the mounting hole 211. The mounting hole 211 and the hollow column 5 are located on the side of the second gripping part 21 away from the first gripping part 11, that is, the side facing away from the first gripping part 11. The hollow column 5 passes through the second through hole 212. The limiting pin 4 of hole 212 is fixed. A recess 52 for the limiting pin 4 to pass through is provided on the outer wall of the hollow column 5. Under the limiting and blocking action of the limiting pin 4, the hollow column 5 cannot be dislodged from the mounting hole 211, nor can it rotate. A side blocking plate 51 is provided at the outer end of the hollow column 5. The outer end of the hollow column 5 mentioned here refers to the end that is in contact with the external space. A fourth through hole 511 is provided on the side blocking plate 51. The limiting key 3 includes a rectangular limiting block 31. A connecting post 32 is connected to the side of the rectangular limiting block 31. The connecting post 32 can pass through the fourth through hole 511. An anti-detachment plate 321 is connected to the connecting post 32. 321 is set inside the cavity of the hollow column 5, and the size of the anti-detachment plate 321 is larger than that of the fourth through hole 511. The anti-detachment plate 321 can prevent the connecting column 32 from detaching from the hollow column 5 through the fourth through hole 511. The side of the rectangular limiting block 31 is also provided with a connecting key 311. The hollow column 5 has a keyway 512. The connecting key 311 can be tightly inserted into the keyway 512 and can be pulled out of the keyway 512. When the connecting key 311 is inserted into the keyway 512, the outer contour of the rectangular limiting block 31 is closest to the connecting section 12. During the operation, the connecting key 311 is inserted into the keyway 512. At this time, the rotatable angle of the rotating handle 2 is the smallest. 2. After rotating to a certain angle, the outer contour of the rectangular limiting block 31 abuts against the connecting section 12, and the rotating handle 2 can no longer rotate. At this time, the upper clamp rod 9 and the lower clamp rod 10 cannot be separated. When cleaning and disinfecting the vertebral plate bone biting forceps after surgery, the connecting key 311 is pulled out from the keyway 512. At this time, the rectangular limiting block 31 can be rotated. Rotating the rectangular limiting block 31 by 90° or other degrees increases the distance between the outer contour of the rectangular limiting block 31 and the connecting section 12, releasing the limiting effect of the limiting key 3. The rotating handle 2 can continue to rotate, and the angle between the rotating handle 2 and the fixed handle 1 increases. At this time, the upper clamp rod 9 and the lower clamp rod 10 can be separated. Of course, the rectangular limiting block 31 can also be designed in other shapes, as long as the distance between the outer contour of the limiting block and the connecting segment 12 is minimized when the connecting key 311 is inserted into the keyway 512. After the connecting key 311 is pulled out of the keyway 512, the limiting block is rotated. After the limiting block is rotated to other angles, the distance between the contour line of the limiting block and the connecting segment 12 is greater than the minimum distance when the connecting key 311 is inserted into the keyway 512.

[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] Working process: Connect the plug-in and hinged parts, connect the hollow column 5 and the limit key 3, and fix the hollow column 5 to the rotating handle 2 with the limit pin 4 to assemble the vertebral plate bone biting forceps. During assembly, the first limit slider 93 and the second limit slider 84 are respectively placed into the first limit slide groove 104 and the second limit slide groove 123 from the position near the fixed handle 1. The connecting pin 7 is placed into the connecting groove 222. When the rotating handle 2 is rotated, it drives the upper forceps bar 9 and the guide rod 8 to slide left and right. During surgery, the connecting key 311 is inserted into the keyway 512. At this position, the distance between the outer contour of the rectangular limiting block 31 and the connecting segment 12 is the shortest among all positions of the rectangular limiting block 31. Rotating the rotating handle 2 causes the upper clamp rod 9 to slide, opening and closing the clamping assembly, completing the bone-biting operation. When the angle between the fixed handle 1 and the rotating handle 2 increases, the upper clamp rod 9 and guide rod 8 slide towards the fixed handle 1, increasing the opening of the clamping assembly. When the outer contour of the rectangular limiting block 31 abuts against the connecting segment 12, the rotating handle 2 cannot continue to rotate. At this time, the first limiting slider 93 is in the first limiting groove 104, and the second limiting... Slider 84 did not slide to the position close to the fixed handle 1 in the second limiting groove 123. The first limiting slider 93 and the second limiting slider 84 were restricted by the limiting grooves they were in and could not disengage. The fourth outer protrusion 107 restricted the third inner protrusion 941. The side limiting wall 94 could not disengage from the limiting rail 105. The second limiting slider 82 was limited by the second inner protrusion 128. The upper clamp rod 9 and the guide rod 8 could not be separated from the lower clamp rod 10 and the connecting section 12, ensuring the stability of the lamina bone biting forceps during surgery and improving the safety of the surgery. When cleaning and disinfecting the lamina bone biting forceps after the surgery, the connecting key 311 was removed from the keyway 512. When the rectangular limiting block 31 is pulled out, it rotates a certain angle, such as 90°. The distance between the outer contour of the rectangular limiting block 31 and the connecting section 12 increases, and the restriction of the rectangular limiting block 31 on the rotating handle 2 is released. The rotating handle 2 can continue to rotate, making the included angle between the fixed handle 1 and the rotating handle 2 larger. At this time, the first limiting slider 93 in the first limiting groove 104 and the second limiting slider 84 in the second limiting groove 123 both slide to a position close to the fixed handle 1. The restriction of the limiting groove on the first limiting slider 93 and the second limiting slider 84 is released, and the restriction of the fourth outer protrusion 107 on the third inner protrusion 941 is released. The limiting wall 94 can disengage from the limiting slide rail 105, the second inner protrusion 128 releases the restriction on the third limiting slider 82, and the upper clamp rod 9 and guide rod 8 can be separated from the lower clamp rod 10 and connecting section 12. The upper clamp rod 9 and guide rod 8 are disassembled, and the lower clamp rod 10 is disassembled from the fixed handle 1. The lamina bone biting forceps are thoroughly cleaned and disinfected, which greatly reduces the possibility of bacteria surviving on the lamina bone biting forceps and reduces the risk of infection to patients when the lamina bone biting forceps are reused. When reused, they can be reassembled. If the upper clamp rod 9 and lower clamp rod 10 need to be replaced, only the upper clamp rod 9 and lower clamp rod 10 need to be replaced, which saves the cost of medical equipment and surgery.

[0039] This invention controls the rotation angle of the rotating handle via a limit key, thereby controlling the sliding distance of the upper clamp rod and guide rod. This, in turn, controls the sliding distance of the limit sliders on the upper clamp rod and guide rod within the limit grooves on the lower clamp rod and connecting section, ultimately controlling whether the upper clamp rod, guide rod, lower clamp rod, and connecting section can be separated. Both the upper and lower clamp rods are connected by a plug-in method, with the plug-in direction of the upper clamp rod and guide rod perpendicular to the plug-in direction of the lower clamp rod and connecting section. This prevents the clamp rod connection from separating or shifting during surgery, improving the stability of the vertebral plate bone-biting forceps. When the upper and lower clamp rods need to be replaced after multiple uses, only the upper and lower clamp rods need to be replaced, saving on medical instrument and surgical costs.

Claims

1. A detachable lamina biting forceps, comprising a hinged fixed handle (1) and a rotating handle (2), wherein the fixed handle (1) is connected to a lower clamp bar (10), and an upper clamp bar (9) is provided above the lower clamp bar (10) to fit against the upper surface of the lower clamp bar (10) and to slide along the length direction of the lower clamp bar (10). A jaw (101) is provided on the lower clamp bar (10), and the jaw (101) is located at the end of the lower clamp bar (10) away from the fixed handle (1). The end of the upper clamp bar (9) away from the fixed handle (1) forms a clamping combination with the jaw (101). When the rotating handle (2) rotates, it causes the upper clamp bar (9) to slide. When the angle between the rotating handle (2) and the fixed handle (1) increases, the upper clamp bar (9) slides towards the fixed handle (1). The characteristic of the forceps is: The lower surface of the upper clamp bar (9) is provided with a first limiting slider (93), and the upper surface of the lower clamp bar (10) is provided with a first limiting groove (104) for limiting the first limiting slider (93). The first limiting slider (93) slides in the first limiting groove (104). When the first limiting slider (93) is close to the jaw (101), the upper clamp bar (9) and the lower clamp bar (10) cannot be separated. When the first limiting slider (93) is close to the fixed handle (1), the upper clamp bar (9) and the lower clamp bar (10) can be separated. The upper clamp bar (9) is provided with a movable... The limit key (3) is located near the hinge of the fixed handle (1) and the rotating handle (2). During surgery, the limit key (3) restricts the rotation angle of the rotating handle (2). The first limit slider (93) cannot slide to a position close to the fixed handle (1) in the first limit groove (104). When cleaning and disinfecting the vertebral plate bone biting forceps, the limit key (3) is rotated to increase the rotation angle of the rotating handle (2). The first limit slider (93) can slide to a position close to the fixed handle (1) in the first limit groove (104).

2. The detachable laminectomy rongeur of claim 1, wherein: The fixed handle (1) includes a first gripping part (11) and a connecting section (12). The connecting section (12) is inserted into the end of the lower clamp bar (10) away from the jaws (101). The rotating handle (2) is driven by the upper clamp bar (9) through the guide rod (8). The lower surface of the guide rod (8) is in contact with the upper surface of the connecting section (12). One end of the guide rod (8) is inserted into the end of the upper clamp bar (9) away from the jaws (101). The other end of the guide rod (8) is hinged to the rotating handle (2). When the rotating handle (2) rotates, it drives the guide rod (8) to slide along the length direction of the connecting section (12), thereby driving the upper clamp bar (9) to slide synchronously.

3. The detachable laminectomy rongeur of claim 2, wherein: The insertion direction of the connecting section (12) and the lower clamp (10) is different from the insertion direction of the guide rod (8) and the upper clamp (9).

4. The detachable laminectomy rongeur of claim 3, wherein: The insertion direction of the connecting section (12) and the lower clamp (10) is perpendicular to the insertion direction of the guide rod (8) and the upper clamp (9).

5. The detachable laminectomy rongeur of claim 2, wherein: The lower surface of the guide rod (8) is provided with a second limiting slider (84), and the upper surface of the connecting section (12) is provided with a second limiting groove (123) for limiting the second limiting slider (84). The second limiting slider (84) slides in the second limiting groove (123). When the second limiting slider (84) is close to the jaw (101), the connecting section (12) and the guide rod (8) cannot be separated. When the second limiting slider (84) is close to the fixed handle (1), the connecting section (12) and the guide rod (8) can be separated.

6. The detachable laminectomy rongeur of claim 2, wherein: The rotating handle (2) includes a second grip (21) and a connector (22). The connecting section (12) has a first slot (121) located at the hinge of the fixed handle (1) and the rotating handle (2). The guide rod (8) has a second slot (81) communicating with the first slot (121). The connector (22) is inserted into the first slot (121) and the second slot (81). The connector (22) has a connecting groove (222) communicating with the outside. The guide rod (8) is hinged to the rotating handle (2) by a connecting pin (7) passing through the guide rod (8) and the connecting groove (222).

7. The detachable laminectomy rongeur of claim 6, wherein: The upper part of the second grip (21) is provided with a hollow column (5) that is inserted into the second grip (21). The hollow column (5) is located on the side of the second grip (21) away from the first grip (11). The second grip (21) is also provided with a limiting pin (4) to prevent the hollow column (5) from coming out of the second grip (21) and to limit the rotation of the hollow column (5). The outer end of the hollow column (5) is provided with a side blocking plate (51). The side blocking plate (51) is provided with a fourth through hole (511). The limiting key (3) includes a rectangular limiting block (31). The side of the rectangular limit block (31) is connected to a connecting post (32) that can pass through the fourth through hole (511). The connecting post (32) is connected to an anti-detachment plate (321) to prevent the connecting post (32) from coming out of the hollow column (5) through the fourth through hole (511). The side of the rectangular limit block (31) is also provided with a connecting key (311). The hollow column (5) is provided with a keyway (512) in which the connecting key (311) can be tightly inserted and pulled out. When the connecting key (311) is inserted into the keyway (512), the outer contour of the rectangular limit block (31) is closest to the connecting section (12).

8. The detachable laminectomy rongeur of claim 1, wherein: The lower clamp (10) has an upwardly protruding limiting slide rail (105) on the middle of its upper surface, which is arranged along the length of the lower clamp (10). The upper clamp (9) has downwardly protruding side limiting walls (94) on both sides of its lower surface. A third limiting groove (95) with the same cross-sectional shape as the limiting slide rail (105) is formed between the two side limiting walls (94). The side limiting walls (94) follow the upper clamp (9) along the limiting slide rail (105). 5) Sliding: When the side limiting wall (94) slides to a position close to the jaws (101), the limiting slide rail (105) limits the side limiting wall (94), and the upper jaw bar (9) and the lower jaw bar (10) cannot be separated. When the side limiting wall (94) slides to a position close to the fixed handle (1), the limiting slide rail (105) does not limit the side limiting wall (94), and the upper jaw bar (9) and the lower jaw bar (10) can be separated.

9. The detachable lamina bone-biting forceps according to claim 8, characterized in that: The upper surface of the limiting slide rail (105) is provided with a limiting boss (108) for positioning the upper clamp bar (9) to slide to the end position in the direction of the clamp mouth (101).

10. The detachable laminectomy rongeur of claim 1, wherein: The opening angle of the cutting edge of the pliers (101) is 90-135°.

Images