Vertebral plate lifting device

Abstract

The vertebral plate lifting device comprises a supporting assembly and a lifting assembly, and the supporting assembly is used for being detachably connected with a screw rod system; the lifting assembly comprises a clamping structure and a lifting structure, the clamping structure is used for clamping the spinous process, the lifting structure is connected with the supporting assembly, and the lifting structure is used for driving the clamping structure to move in the first direction so as to lift the spinous process and the vertebral plate connected with the spinous process. Compared with an existing vertebral plate lifting device which is directly connected with the vertebrae through screws, the vertebral plate lifting device provided by the embodiment of the invention is detachably connected with the screw-rod system, and after the lifting structure clamps the spinous process, the lifting structure of the lifting assembly can drive the clamping structure to move in the first direction so as to lift the spinous process and the vertebral plate, so that the spinous process and the vertebral plate can be conveniently lifted, and the vertebral plate can be conveniently lifted. The situation that screw holes connected with the vertebral plate lifting device are additionally formed in the vertebral plate and the vertebrae, and consequently the strength of the vertebral plate and the vertebrae is affected can be avoided; in addition, the risk that screw holes are additionally formed in the vertebral plate, so that nerves in the vertebral canal are damaged is reduced.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a lamina lifting device. Background Art

[0002] Patients with ossification of the ligamentum flavum in the cervical and thoracic vertebrae usually need to surgically remove the posterior laminae and the ossified ligamentum flavum to expand the spinal canal and relieve nerve compression. Clinically, a commonly used lamina lifting device is used to lift the laminae in the decompression area as a whole to make the lifting of the laminae more convenient. However, the existing lamina lifting devices are usually fixed to the vertebrae by screws, and screw holes need to be opened on the laminae, which easily affects the strength of the laminae. Summary of the Invention

[0003] An embodiment of this application provides a lamina lifting device, aiming to solve the problem that the existing lamina lifting devices are usually fixed to the vertebrae by screws, screw holes need to be opened on the vertebrae, and the strength of the vertebrae is easily affected.

[0004] An embodiment of this application provides a lamina lifting device, including:

[0005] A support assembly for detachably connecting to a screw-rod system;

[0006] A lifting assembly including a clamping structure and a lifting structure. The clamping structure is used for clamping the spinous process, the lifting structure is connected to the support assembly, and the lifting structure is used for driving the clamping structure to move in a first direction to lift the spinous process and the lamina connected to the spinous process.

[0007] In some embodiments, the clamping structure includes a driving mechanism and a jaw mechanism connected to each other. The driving mechanism is used for driving the jaw mechanism to clamp or release the spinous process. The driving mechanism is slidably connected to the support assembly in the first direction. The lifting structure is used for driving the driving mechanism to slide relative to the support assembly in the first direction to drive the jaw mechanism to lift the spinous process and the lamina.

[0008] In some embodiments, the jaw mechanism includes two jaws. The driving mechanism is connected to the two jaws, and the driving mechanism is used for driving the two jaws to close or open so that the two jaws clamp or release the spinous process.

[0009] In some embodiments, the driving mechanism includes a movable member, a lifting member, and a driving member. The movable member is movably connected to the lifting member. The two jaws are respectively rotatably connected to the lifting member. The two jaws are respectively connected to the movable member. The lifting member is slidably connected to the support assembly in the first direction. The lifting structure is connected to the lifting member and is used for driving the lifting member to slide in the first direction;

[0010] The movable member and the lifting member are respectively connected to the driving member, and the driving member is configured to drive the movable member to move relative to the lifting member to drive the two jaws to close or open.

[0011] In some embodiments, the movable member is slidably connected to the lifting member along the first direction, and the driving member is configured to drive the movable member to slide relative to the lifting member to drive the two jaws to close or open.

[0012] In some embodiments, the movable member includes two connecting portions, and the two connecting portions are respectively connected to the two jaws in one-to-one correspondence;

[0013] Wherein, one of the connecting portion and the corresponding jaw is provided with a connecting shaft, the axial direction of the connecting shaft is substantially perpendicular to the first direction, and the other of the connecting portion and the corresponding jaw is provided with a connecting hole, and the connecting shaft is inserted into the connecting hole; when the movable member slides along the first direction, the two connecting shafts respectively abut against the inner surfaces of the corresponding connecting holes to push the two jaws to rotate relative to the lifting member, so that the two jaws are closed or opened.

[0014] In some embodiments, the jaw can rotate relative to the lifting member about a first rotation axis, and the first rotation axis is substantially parallel to the length direction of the connecting shaft; the connecting hole extends along a curved section, and in the direction from one end to the other end of the curved section, the minimum distance from each point on the curved section to the first rotation axis decreases first and then increases; the connecting shaft can move in the connecting hole along the extending direction of the curved section.

[0015] In some embodiments, the driving member is threadedly connected to an end of the lifting member away from the jaw, so that the driving member can rotate relative to the lifting member about a second rotation axis and move along the second rotation axis, and the second rotation axis is substantially parallel to the first direction;

[0016] The driving member is provided with a driving portion, and the driving member can rotate relative to the lifting member about the second rotation axis, so that the driving portion abuts against the movable member and pushes the movable member to slide relative to the lifting member.

[0017] In some embodiments, the movable member is provided with a first limiting groove extending along the second rotation axis, the opposite inner side surfaces of the first limiting groove are distributed along the first direction, at least a part of the driving portion is located in the first limiting groove and can move circumferentially along the second rotation axis in the first limiting groove, and the driving portion is configured to abut against the inner side surface of the first limiting groove to push the movable member to slide relative to the lifting member; or,

[0018] The driving part is provided with a second limiting groove extending along the second rotation axis. The opposite inner side surfaces of the second limiting groove are distributed along the first direction. A part of the movable member is located in the second limiting groove and can move circumferentially along the second rotation axis in the second limiting groove. The inner side surface of the second limiting groove is used to abut against the movable member to push the movable member to slide relative to the lifting member.

[0019] In some embodiments, the lifting member includes a rack extending along the first direction. The lifting structure includes a gear rotatably connected to the support assembly. The gear meshes with the rack. The gear can rotate relative to the support assembly to drive the rack to drive the lifting member to slide along the first direction.

[0020] In some embodiments, the lifting structure further includes a locking mechanism. The locking mechanism is used to lock and unlock the lifting member. When the locking mechanism locks the lifting member, it restricts the lifting member from sliding in the reverse direction of the first direction. When the locking mechanism unlocks the lifting member, the lifting member can slide in the reverse direction of the first direction.

[0021] In some embodiments, the lifting member includes a rack extending along the first direction. The locking mechanism includes a first locking member movably connected to the support assembly. The first locking member can move between a locking position and an unlocking position relative to the lifting member. When the first locking member is in the locking position, it meshes with the teeth of the rack to lock the lifting member. When the first locking member is in the unlocking position, it disengages from the teeth of the rack to unlock the lifting member.

[0022] In some embodiments, the locking mechanism further includes an elastic member connected to the support assembly or the lifting member. The elastic member is connected to the first locking member to drive the first locking member to move from the unlocking position to the locking position.

[0023] In some embodiments, the lifting member is provided with a scale extending along the first direction.

[0024] In some embodiments, the support assembly includes a support member and a connection structure connected to each other. The lifting assembly is connected to the support member. The connection structure is used to connect to the nail-rod system. In the second direction, the position of the support member relative to the connection structure is adjustable. The second direction is substantially perpendicular to the first direction.

[0025] In some embodiments, the connection structure includes a connecting member for detachably connecting with the nail-rod system, and a second locking member movably connected to the connecting member. The support member can move relative to the connecting member in the second direction. The second locking member is used to lock the connecting member and the support member to limit the movement of the support member relative to the connecting member in the second direction. The second locking member is also used to unlock the connecting member and the support member so that the support member can move relative to the connecting member in the second direction.

[0026] In some embodiments, the connecting member is provided with a mounting hole extending along the second direction. The support member includes a mounting portion, and the mounting portion is slidably mounted in the mounting hole along the second direction. The second locking member is threadedly connected to the connecting member, and the second locking member can rotate relative to the connecting member in a spiral manner so that the second locking member abuts against or separates from the support member. Or,

[0027] The support member is provided with a strip-shaped hole extending along the second direction. The second locking member includes a first locking portion, and the connecting member includes a second locking portion. One of the first locking portion and the second locking portion is provided with a sliding portion. The sliding portion passes through the strip-shaped hole and is threadedly connected to the other of the first locking portion and the second locking portion. The sliding portion can slide in the strip-shaped hole along the second direction, and the sliding portion can rotate relative to the other of the first locking portion and the second locking portion in a spiral manner to drive the first locking portion and the second locking portion to approach or separate from each other, so that the first locking portion and the second locking portion clamp or release the support member.

[0028] In some embodiments, the connecting member is used for detachably connecting with the connecting rod of the nail-rod system. The connecting member includes two clamping portions, and the two clamping portions are used for clamping the connecting rod. Or,

[0029] The connecting member is detachably connected to the pedicle screw of the nail-rod system. The connecting member includes a clamping groove, and a part of the pedicle screw is inserted into the clamping groove so that the connecting member is clamped to the pedicle screw.

[0030] The lamina lifting device provided by the embodiment of the present application detachably connects the support component to the nail-rod system, and connects the clamping structure of the lifting component to the support component. When the spine process is clamped by the lifting structure, the clamping structure can be driven to move in the first direction through the lifting structure of the lifting component, so as to lift the spine process and the lamina connected to the spine process. Compared with the existing lamina lifting device that is directly connected to the vertebra through screws, the lamina lifting device provided by the embodiment of the present application is detachably connected to the nail-rod system, which can avoid additionally opening screw holes for connecting the lamina lifting device on the vertebra and affecting the strength of the vertebra. Moreover, it can also make the installation and disassembly of the lamina lifting device more convenient, which is beneficial to improving the surgical efficiency. In addition, the lifting component of the lamina lifting device lifts the lamina by clamping the spine process, which can avoid opening screw holes for connecting the lamina lifting device on the lamina and affecting the strength of the lamina and damaging the nerves in the spinal canal. Description of the Drawings

[0031] The following will clearly show the technical solutions and other beneficial effects of the present application by describing the specific embodiments of the present application in detail with reference to the drawings.

[0032] Figure 1 It is a schematic structural diagram of an embodiment of the lamina lifting device provided by the embodiment of the present application;

[0033] Figure 2 is Figure 1 a cross-sectional view of the lamina lifting device in [Figure number], wherein the cross-section is parallel to the first direction and the second direction;

[0034] Figure 3 is Figure 2 an enlarged view of part A in [Figure number];

[0035] Figure 4 is Figure 2 an enlarged view of part B in [Figure number];

[0036] Figure 5 It is a schematic partial structural diagram of an embodiment of the jaw and the movable part provided by the embodiment of the present application;

[0037] Figure 6 It is a schematic structural diagram when the two jaws provided by the embodiment of the present application are opened;

[0038] Figure 7 It is a schematic structural diagram when the two jaws provided by the embodiment of the present application are closed;

[0039] Figure 8 is Figure 2 an enlarged view of part C in [Figure number];

[0040] Figure 9 It is a schematic structural diagram of another embodiment of the lamina lifting device provided by the embodiment of the present application;

[0041] Figure 10 is Figure 9 a cross-sectional view of the middle lamina lifting device, wherein the cross-section is parallel to the first direction and the second direction;

[0042] Figure 11 is Figure 10 an enlarged view of the position D in

[0043] Lamina lifting device 1; support assembly 10; support member 11; strip-shaped hole 111; connection structure 12; connecting member 121; mounting hole 1211; clamping portion 1212; clamping groove 1213; clamping portion 1214; clamping protrusion 1215; abutting surface 1216; connection seat 1217; second locking member 122; sliding portion 1221; lifting assembly 13; clamping structure 130; driving mechanism 131; movable member 1311; connecting portion 1312; first limiting groove 1313; connecting shaft 1314; lifting member 1315; sliding hole 1316; rack 1317; driving member 1319; driving portion 1321; jaw mechanism 132; jaw 1322; connecting hole 1323; lifting structure 133; gear 1331; locking mechanism 134; first locking member 1341; locking teeth 1342; pushing portion 1343; elastic member 1344; curve segment S; first rotation axis X1; second rotation axis X2; first direction X; second direction Y; rod-screw system 2; connecting rod 20; pedicle screw 21; card slot 211; screw seat 212. Specific embodiments

[0044] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0045] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0046] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" shall be construed broadly. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection, an electrical connection or a connection capable of mutual communication; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0047] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0048] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0049] An embodiment of the present application provides a lamina lifting device.

[0050] Figure 1 It is a schematic structural diagram of an embodiment of the lamina lifting device provided by the embodiment of the present application. As Figure 1 shown, the lamina lifting device 1 includes a support assembly 10 and a lifting assembly 13. The support assembly 10 is used for detachably connecting with the screw-rod system 2; the lifting assembly 13 includes a clamping structure 130 and a lifting structure 133. The clamping structure 130 is used for clamping the spinous process (not shown in the figure), and the lifting structure 133 is connected with the support assembly 10. The lifting structure 133 is used for driving the clamping structure 130 to move along the first direction X to lift the spinous process and the lamina connected to the spinous process.

[0051] The lamina lifting device 1 provided by the embodiment of the present application detachably connects the support assembly 10 with the screw-rod system 2, and connects the clamping structure 130 of the lifting assembly 13 with the support assembly 10. When the lifting structure 133 clamps the spinous process, the clamping structure 130 can be driven by the lifting structure 133 of the lifting assembly 13 to move along the first direction X to lift the spinous process and the lamina connected to the spinous process. Compared with the existing lamina lifting device 1 directly connecting with the vertebra through screws, the lamina lifting device 1 provided by the embodiment of the present application is detachably connected with the screw-rod system 2, which can avoid additionally opening screw holes for connecting with the lamina lifting device 1 on the vertebra and affecting the strength of the vertebra. Moreover, it can also make the installation and disassembly of the lamina lifting device 1 more convenient, which is beneficial to improving the surgical efficiency. In addition, the lifting assembly 13 of the lamina lifting device 1 lifts the lamina by clamping the spinous process, which can avoid opening screw holes for connecting with the lamina lifting device 1 on the lamina and affecting the strength of the lamina and damaging the nerves in the spinal canal.

[0052] It should be noted that the screw-rod system 2 is used for connecting with multiple vertebrae of the spine, and it includes pedicle screws 21 for connecting with the vertebrae, and a connecting rod 20 connected to the pedicle screws 21 provided on multiple vertebrae. The lifting structure 133 of the lamina lifting device 1 can be detachably connected with the connecting rod 20 or the pedicle screw 21 of the screw-rod system 2, which will be described in detail below.

[0053] In some embodiments, such as Figure 1 and Figure 2 shown, the clamping structure 130 may include a driving mechanism 131 and a jaw mechanism 132 connected to each other. The driving mechanism 131 is configured to drive the jaw mechanism 132 to clamp or release the spinous process. The driving mechanism 131 is slidably connected to the support assembly 10 along the first direction X. The lifting structure 133 is configured to drive the driving mechanism 131 to slide relative to the support assembly 10 along the first direction X so as to drive the jaw mechanism 132 to lift the spinous process and the lamina.

[0054] When using the lamina lifting device 1, the driving mechanism 131 can drive the jaw mechanism 132 to slide in the reverse direction of the first direction X to a position where the jaw mechanism 132 can clamp the spinous process, and then the driving mechanism 131 drives the jaw mechanism 132 to move so that the jaw mechanism 132 clamps the spinous process. After that, the lifting structure 133 drives the driving mechanism 131 to slide relative to the support assembly 10 along the first direction X so as to drive the jaw mechanism 132, the spinous process and the lamina to move along the first direction X, thereby realizing the lifting of the spinous process and the lamina.

[0055] Among them, the jaw mechanism 132 may include two jaws 1322. The driving mechanism 131 is connected to the two jaws 1322. The driving mechanism 131 is configured to drive the two jaws 1322 to close (as Figure 7 shown) or open (as Figure 6 shown) so that the two jaws 1322 clamp or release the spinous process. Thus, the structure of the jaw mechanism 132 can be made simpler, and the jaw mechanism 132 can stably clamp the spinous process. Before the driving mechanism 131 drives the jaw mechanism 132 to slide in the reverse direction of the first direction X to a position where the jaw mechanism 132 can clamp the spinous process, the driving mechanism 131 can drive the two jaws 1322 to open; after the driving mechanism 131 drives the jaw mechanism 132 to slide in the reverse direction of the first direction X to a position where the jaw mechanism 132 can clamp the spinous process, and the spinous process is located between the two open jaws 1322, the driving mechanism 131 can drive the two jaws 1322 to close so that the two jaws 1322 clamp the spinous process.

[0056] After that, the lifting structure 133 can drive the driving mechanism 131 to slide relative to the support assembly 10 along the first direction X so as to drive the jaw mechanism 132, the spinous process and the lamina to move along the first direction X, thereby realizing the lifting of the spinous process and the lamina. When the driving mechanism 131 drives the two jaws 1322 to open, the jaw mechanism 132 can release the spinous process.

[0057] In some embodiments, such as Figure 2As shown, the driving mechanism 131 may include a movable member 1311, a lifting member 1315, and a driving member 1319. The movable member 1311 is movably connected to the lifting member 1315. Two clamping jaws 1322 are respectively rotatably connected to the lifting member 1315, and the two clamping jaws 1322 are respectively connected to the movable member 1311. The movable member 1311 and the lifting member 1315 are respectively connected to the driving member 1319. The driving member 1319 is used to drive the movable member 1311 to move relative to the lifting member 1315, so as to drive the two clamping jaws 1322 to close or open. Thus, by driving the movable member 1311 to move relative to the lifting member 1315 by the driving member 1319, the clamping jaw mechanism 132 can clamp or release the spinous process, the operation is very convenient, and the structure of the driving mechanism 131 is also relatively simple.

[0058] Among them, the lifting member 1315 can be slidably connected to the support assembly 10 along the first direction X. The lifting structure 133 is connected to the lifting member 1315 and is used to drive the lifting member 1315 to slide along the first direction X, so as to drive the movable member 1311 and the driving member 1319 of the driving mechanism 131 to slide relative to the support assembly 10 along the first direction X together, and further drive the clamping jaw mechanism 132, the spinous process, and the lamina to move along the first direction X together.

[0059] In some embodiments, the movable member 1311 can be slidably connected to the lifting member 1315, and the driving member 1319 is used to drive the movable member 1311 to slide relative to the lifting member 1315, so as to drive the two clamping jaws 1322 to close or open. Among them, the movable member 1311 can be slidably connected to the lifting member 1315 along the first direction X, and the driving member 1319 is used to drive the movable member 1311 to slide relative to the lifting member 1315, so as to drive the two clamping jaws 1322 to close or open. Thus, the sliding connection between the movable member 1311 and the lifting member 1315 can be made more stable.

[0060] Among them, the driving member 1319 can be used to drive the movable member 1311 to slide in the reverse direction of the first direction X relative to the lifting member 1315, so as to drive the two clamping jaws 1322 to close, and the driving member 1319 is used to drive the movable member 1311 to slide along the first direction X relative to the lifting member 1315, so as to drive the two clamping jaws 1322 to open. Or, the driving member 1319 can also be used to drive the movable member 1311 to slide along the first direction X relative to the lifting member 1315, so as to drive the two clamping jaws 1322 to close, and the driving member 1319 is used to drive the movable member 1311 to slide in the reverse direction of the first direction X relative to the lifting member 1315, so as to drive the two clamping jaws 1322 to open. Of course, the former can make the two clamping jaws 1322 clamp the spinous process more stably.

[0061] In other embodiments, the movable member 1311 may also be rotatably connected to the lifting member 1315, and the driving member 1319 is used to drive the movable member 1311 to rotate relative to the lifting member 1315 to drive the two jaws 1322 to close or open.

[0062] As Figures 5 to 7 shown, the movable member 1311 may include two connecting portions 1312, and the two connecting portions 1312 and the two jaws 1322 are connected in a one-to-one correspondence. Wherein, a connecting shaft 1314 is provided on one of the connecting portion 1312 and the corresponding jaw 1322, the axial direction of the connecting shaft 1314 is substantially perpendicular to the first direction X, and a connecting hole 1323 is provided on the other of the connecting portion 1312 and the corresponding jaw 1322, and the connecting shaft 1314 is inserted into the connecting hole 1323 so that the connecting portion 1312 and the corresponding jaw 1322 can rotate relative to each other. Moreover, when the movable member 1311 slides along the first direction X, the two connecting shafts 1314 can respectively abut against the inner surface of the corresponding connecting hole 1323 to push the two jaws 1322 to rotate relative to the lifting member 1315, so that the two jaws 1322 are closed or opened.

[0063] It should be noted that the connecting shaft 1314 may be provided on the connecting portion 1312 and the connecting hole 1323 may be provided on the jaw 1322. Or, the connecting hole 1323 may be provided on the connecting portion 1312 and the connecting shaft 1314 may be provided on the jaw 1322.

[0064] In some embodiments, the jaw 1322 may be rotatable relative to the lifting member 1315 about a first rotation axis X1, and the first rotation axis X1 is substantially parallel to the length direction of the connecting shaft 1314, so that the movable member 1311 can drive the two jaws 1322 to close or open more smoothly.

[0065] Wherein, the connecting hole 1323 may extend along a curved segment S, and in the direction from one end to the other end of the curved segment S, the minimum distance from each point on the curved segment S to the first rotation axis X1 decreases first and then increases, and the connecting shaft 1314 can move in the connecting hole 1323 along the extension direction of the curved segment S. Thus, it is possible to avoid the situation where the movable member 1311 and the connecting portion 1312 are stuck when the movable member 1311 slides along the first direction X to drive the two jaws 1322 to close or open.

[0066] Specifically, the two jaws 1322 are located between the two connecting portions 1312. The connecting hole 1323 is opened on the jaw 1322. The curved segment S is an arc. The plane where the curved segment S is located is perpendicular to the circumferential direction of the connecting shaft 1314. The two jaws 1322 are respectively rotatably connected to the lifting member 1315 through a hinge shaft. The hinge shaft and the connecting shaft 1314 corresponding to the same jaw 1322 are parallel to each other.

[0067] In some embodiments, the lifting member 1315 is provided with a sliding hole 1316 extending along the first direction X, and the movable member 1311 is slidably mounted in the sliding hole 1316 along the first direction X, so that the sliding connection between the movable member 1311 and the lifting member 1315 is more stable.

[0068] In some embodiments, as Figure 2 and Figure 4 shown, the driving member 1319 can be threadedly connected to the end of the lifting member 1315 away from the jaw 1322, so that the driving member 1319 can rotate relative to the lifting member 1315 about the second rotation axis X2 and move along the second rotation axis X2. The second rotation axis X2 is substantially parallel to the first direction X. The driving member 1319 is provided with a driving portion 1321. The driving member 1319 can rotate relative to the lifting member 1315 about the second rotation axis X2, so that the driving portion 1321 abuts against the movable member 1311 and pushes the movable member 1311 to slide relative to the lifting member 1315. Thus, when the driving member 1319 rotates relative to the lifting member 1315 about the second rotation axis X2, so that the driving portion 1321 abuts against the movable member 1311 and pushes the movable member 1311 to slide a certain distance relative to the lifting member 1315, the threaded engagement structure between the driving member 1319 and the lifting member 1315 can keep the position of the driving member 1319 relative to the lifting member 1315 stable in the first direction X, which is beneficial to keeping the position of the movable member 1311 relative to the lifting member 1315 stable in the first direction X, so that the two jaws 1322 can be stably held in the closed or open position.

[0069] Among them, a first limiting groove 1313 extending along the second rotation axis X2 can be formed in the movable member 1311. The opposite inner side surfaces of the first limiting groove 1313 are distributed along the first direction X. At least a part of the driving portion 1321 is located in the first limiting groove 1313 and can move circumferentially along the second rotation axis X2 in the first limiting groove 1313. The driving portion 1321 is used to abut against the inner side surface of the first limiting groove 1313 to push the movable member 1311 to slide relative to the lifting member 1315.

[0070] It can be understood that when the driving member 1319 rotates relative to the lifting member 1315 about the second rotation axis X2, it will drive the driving portion 1321 to rotate about the second rotation axis X2 and, at the same time, move along the first direction X. By making at least a part of the driving portion 1321 located in the first limiting groove 1313 and capable of moving circumferentially along the second rotation axis X2 in the first limiting groove 1313, the rotation of the driving portion 1321 about the second rotation axis X2 can be prevented from being interfered by the movable member 1311, so that the driving portion 1321 can more stably push the movable member 1311 to slide relative to the lifting member 1315 along the first direction X or the reverse direction of the first direction X.

[0071] Alternatively, a second limiting groove extending along the second rotation axis X2 may be formed in the driving portion 1321. The opposite inner side surfaces of the second limiting groove are distributed along the first direction X. A part of the movable member 1311 is located in the second limiting groove and can move circumferentially along the second rotation axis X2 in the second limiting groove. The inner side surface of the second limiting groove is used to abut against the movable member 1311 to push the movable member 1311 to slide relative to the lifting member 1315. Thus, when the driving member 1319 rotates relative to the lifting member 1315 around the second rotation axis X2, the second limiting groove of the driving portion 1321 will be driven to rotate around the second rotation axis X2 and move along the first direction X. Thereby, the inner side surface of the second limiting groove on one side along the first direction X can be made to abut against the part of the movable member 1311 located in the second limiting groove to push the movable member 1311 to slide relative to the lifting member 1315.

[0072] In some embodiments, as Figure 3 shown, the lifting member 1315 may include a rack 1317 extending along the first direction X. The lifting structure 133 includes a gear 1331 rotatably connected to the support assembly 10. The gear 1331 meshes with the rack 1317. The gear 1331 can rotate relative to the support assembly 10 to drive the rack 1317 to drive the lifting member 1315 to slide along the first direction X. Thus, by rotating the gear 1331, the lifting member 1315 can be stably driven to slide along the first direction X or the first direction X, and the structure is very simple.

[0073] In some embodiments, as Figure 3 shown, the lifting structure 133 may further include a locking mechanism 134. The locking mechanism 134 is used to lock and unlock the lifting member 1315. When the locking mechanism 134 locks the lifting member 1315, the reverse sliding of the lifting member 1315 along the first direction X is restricted, so that after the lifting structure 133 lifts the spinous process and the lamina, the positions of the spinous process and the lamina are kept stable. When the locking mechanism 134 unlocks the lifting member 1315, the lifting member 1315 can slide in the reverse direction of the first direction X, so that the clamping structure 130 can move towards the spinous process and clamp the spinous process before the lamina lifting device 1 lifts the spinous process and the lamina.

[0074] The lifting member 1315 includes a rack 1317 extending along the first direction X, and the locking mechanism 134 may include a first locking member 1341 movably connected to the support assembly 10, and the first locking member 1341 may move between a locking position and an unlocking position relative to the lifting member 1315. When the first locking member 1341 is in the locking position, it engages with the teeth of the rack 1317 to lock the lifting member 1315. When the first locking member 1341 is in the unlocking position, it disengages from the teeth of the rack 1317 to unlock the lifting member 1315. By engaging the first locking member 1341 with the rack 1317, the lifting member 1315 can be stably locked, and by disengaging the first locking member 1341 from the teeth of the rack 1317, the lifting member 1315 can be unlocked, which is very convenient to operate.

[0075] Continue to refer to Figure 3 The locking mechanism 134 further includes an elastic member 1344 connected to the support assembly 10 or the lifting member 1315, and the elastic member 1344 is connected to the first locking member 1341 to drive the first locking member 1341 to move from the unlocking position to the locking position. Thus, the first locking member 1341 can be stably maintained in the locking position by the elastic member 1344 to stably lock the lifting member 1315.

[0076] Specifically, the support assembly 10 includes a support base, and the lifting member 1315 is slidably connected to the support base along the first direction X. The gear 1331 is rotatably connected to the support base. The first locking member 1341 is slidably connected to the support base, and the sliding direction of the first locking member 1341 relative to the support base is substantially perpendicular to the first direction X. The first locking member 1341 includes a locking tooth 1342 located on the side of the lifting member 1315 provided with the rack 1317, and a pushing portion 1343 located on the side of the lifting member 1315 away from the rack 1317. The elastic member 1344 is provided between the pushing portion 1343 and the lifting member 1315, one end of the elastic member 1344 abuts against the lifting member 1315, and the other end of the elastic member 1344 abuts against the pushing portion 1343, so that the pushing portion 1343 drives the locking tooth 1342 to move between two adjacent teeth of the rack 1317, so that the first locking member 1341 is kept in the locked position. When it is necessary to unlock the lifting member 1315 , the pushing portion 1343 can be pressed to make the locking tooth 1342 withdraw from between two adjacent teeth of the rack 1317 .

[0077] In some embodiments, the lifting member 1315 may also be provided with a scale extending along the first direction X, so as to accurately determine the lifting height of the spinous process and the vertebral plate according to the scale.

[0078] In some embodiments, the support assembly 10 may include a support member 11 and a connection structure 12 that are connected to each other. The lifting assembly 13 is connected to the support member 11, and the connection structure 12 is used to connect to the nail-rod system 2. In the second direction Y, the position of the support member 11 relative to the connection structure 12 is adjustable, and the second direction Y is substantially perpendicular to the first direction X. Thus, by adjusting the position of the support member 11 relative to the connection structure 12 in the second direction Y, the position of the lifting assembly 13 can be adjusted so that the clamping structure 130 of the lifting assembly 13 can clamp the spinous process more accurately.

[0079] As Figures 1 to 3 shown, the connection structure 12 may include a connecting member 121 for detachably connecting to the nail-rod system 2. The support member 11 can move relative to the connecting member 121 in the second direction Y, so that the position of the support member 11 in the second direction Y is adjustable, and further the position of the lifting assembly 13 in the second direction Y is adjusted.

[0080] Wherein, the connection structure 12 may further include a second locking member 122 movably connected to the connecting member 121. The second locking member 122 is used to lock the connecting member 121 and the support member 11 to limit the support member 11 from moving relative to the connecting member 121 in the second direction Y. Moreover, the second locking member 122 is also used to unlock the connecting member 121 and the support member 11 so that the support member 11 can move relative to the connecting member 121 in the second direction Y.

[0081] Thus, when the second locking member 122 unlocks the connecting member 121 and the support member 11, the support member 11 can move relative to the connecting member 121 in the second direction Y to adjust the position of the lifting assembly 13 in the second direction Y. By locking the connecting member 121 and the support member 11 with the second locking member 122, the position of the lifting assembly 13 in the second direction Y can be kept stable.

[0082] In some embodiments, as Figures 9 to 11 shown, an installation hole 1211 extending in the second direction Y may be formed in the connecting member 121. The support member 11 includes an installation portion, and the installation portion is slidably installed in the installation hole 1211 along the second direction Y, so that the support member 11 is slidably connected to the connecting member 121 along the second direction Y.

[0083] The second locking member 122 is threadedly connected to the connecting member 121, and the second locking member 122 can rotate relative to the connecting member 121 in a spiral manner so that the second locking member 122 abuts against or separates from the support member 11. Thus, when the second locking member 122 abuts against the support member 11, the support member 11 and the connecting member 121 can be locked, and when the second locking member 122 separates from the support member 11, the support member 11 and the connecting member 121 can be unlocked, and the operation is very convenient.

[0084] In other embodiments, as Figures 1 to 3As shown, a strip hole 111 extending along the second direction Y may also be provided in the support member 11. The second locking member 122 includes a first locking portion, the connecting member 121 includes a second locking portion, one of the first locking portion and the second locking portion is provided with a sliding portion 1221, the sliding portion 1221 passes through the strip hole 111 and is threadedly connected to the other of the first locking portion and the second locking portion, the sliding portion 1221 can slide in the strip hole 111 along the second direction Y, and the sliding portion 1221 can spirally rotate relative to the other of the first locking portion and the second locking portion to drive the first locking portion and the second locking portion to move closer to or away from each other, so that the first locking portion and the second locking portion clamp or release the support member 11.

[0085] Therefore, when the first locking part and the second locking part loosen the support member 11, the connecting member 121 and the support member 11 can be unlocked, and when the first locking part and the second locking part clamp the support member 11, the connecting member 121 and the support member 11 can be locked, and the operation is very convenient.

[0086] In the embodiment of the present application, the number of the connecting members 121 can be two, and the two connecting members 121 are sequentially distributed along the second direction Y. The two connecting members 121 can be used to be detachably connected to the two connecting rods 20 of the nail-rod system 2 in a one-to-one correspondence. Alternatively, the two connecting members 121 can also be used to be detachably connected to the two pedicle screws 21 of the nail-rod system 2.

[0087] In some embodiments, Figures 9 to 11 As shown, the connecting member 121 is used for detachable connection with the connecting rod 20 of the nail rod system 2. The connecting member 121 includes two clamping parts 1212, and the two clamping parts 1212 are used to clamp the connecting rod 20, so that the connection and separation of the connecting member 121 and the connecting rod 20 are more convenient.

[0088] The clamping portion 1212 includes an abutting surface 1216 for abutting against the connecting rod 20 . The abutting surfaces 1216 of the two clamping portions 1212 are respectively used to abut against two radial sides of the connecting rod 20 , so that the two clamping portions 1212 clamp the connecting rod 20 .

[0089] The connecting member 121 also includes a connecting seat 1217 to which a second locking member 122 is threadedly connected, and a mounting hole 1211 is formed between the connecting seat 1217 and the two clamping portions 1212. When the support member 11 is inserted into the mounting hole 1211, the connecting seat 1217 and the two clamping portions 1212 are located on both sides of the support member 11. The second locking member 122 is used to abut against a side of the support member 11 away from the two clamping portions 1212, and the two clamping portions 1212 abut against a side of the support member 11 away from the connecting seat 1217, thereby locking the support member 11. At the same time, the force applied by the support member 11 to the two clamping portions 1212 can enable the two clamping portions 1212 to clamp the connecting rod 20 more stably.

[0090] In other embodiments, such as Figure 1 and Figure 8 shown, the connecting member 121 is used for detachably connecting with the pedicle screw 21 of the screw-rod system 2. Among them, the connecting member 121 includes a clamping groove 1213, and a part of the pedicle screw 21 is inserted into the clamping groove 1213, so that the connecting member 121 is clamped with the pedicle screw 21, thereby making the connection and separation between the connecting member 121 and the pedicle screw 21 more convenient.

[0091] Specifically, as Figure 2 and Figure 8 shown, the connecting member 121 includes two clamping portions 1214, and the two clamping portions 1214 are located on both sides of the clamping groove 1213. After a part of the pedicle screw 21 is inserted into the clamping groove 1213, the two clamping portions 1214 are clamped with the part of the pedicle screw 21 inserted into the clamping groove 1213.

[0092] It is possible to make a clamping protrusion 1215 protrude from the side of the clamping portion 1214 facing the clamping groove 1213, and a clamping groove 211 is provided on the part of the pedicle screw 21 inserted into the clamping groove 1213. Or, a clamping protrusion 1215 is provided on the part of the pedicle screw 21 inserted into the clamping groove 1213, and a clamping groove 211 is opened at the corresponding position of the clamping portion 1214. After a part of the pedicle screw 21 is inserted into the clamping groove 1213, the clamping protrusion 1215 is inserted into the corresponding clamping groove 211, so that the clamping portion 1214 is stably clamped with the part of the pedicle screw 21 inserted into the clamping groove 1213.

[0093] Among them, the clamping groove 211 or the clamping protrusion 1215 can be provided on the nail seat 212 of the pedicle screw 21, or the clamping groove 211 or the clamping protrusion 1215 can be provided on other components of the pedicle screw 21.

[0094] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0095] The above has introduced in detail a kind of lamina lifting device provided by the embodiments of the present application. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A lamina lifting device, characterized in that: include: A support assembly for detachably connecting with the nail rod system; The lifting assembly comprises a clamping structure and a lifting structure, wherein the clamping structure is used to clamp the spinous process, the lifting structure is connected to the supporting assembly, and the lifting structure is used to drive the clamping structure to move along a first direction to lift the spinous process and the vertebral plate connected to the spinous process.

2. The lamina lifting device according to claim 1, characterized in that: The clamping structure includes a driving mechanism and a clamping mechanism that are interconnected, wherein the driving mechanism is used to drive the clamping mechanism to clamp or release the spinous process, and the driving mechanism is slidably connected to the support assembly along the first direction, and the lifting structure is used to drive the driving mechanism to slide relative to the support assembly along the first direction to drive the clamping mechanism to lift the spinous process and the vertebral plate.

3. The lamina lifting device according to claim 2, characterized in that: The clamping mechanism comprises two clamping jaws, the driving mechanism is connected to the two clamping jaws, and the driving mechanism is used to drive the two clamping jaws to close or open so that the two clamping jaws clamp or release the spinous process.

4. The lamina lifting device according to claim 3, characterized in that: The driving mechanism comprises a movable member, a lifting member and a driving member, the movable member is movably connected to the lifting member, the two clamping claws are respectively rotatably connected to the lifting member, the two clamping claws are respectively connected to the movable member, the lifting member is slidably connected to the supporting assembly along the first direction, and the lifting structure is connected to the lifting member and is used to drive the lifting member to slide along the first direction; The movable member and the lifting member are respectively connected to the driving member, and the driving member is used to drive the movable member to move relative to the lifting member to drive the two clamping jaws to close or open.

5. The lamina lifting device according to claim 4, characterized in that: The movable member is slidably connected to the lifting member along the first direction, and the driving member is used to drive the movable member to slide relative to the lifting member to drive the two clamping jaws to close or open.

6. The lamina lifting device according to claim 5, characterized in that: The movable member comprises two connecting parts, and the two connecting parts are connected to the two clamping jaws in a one-to-one correspondence; Among them, one of the connecting part and the corresponding clamping jaw is provided with a connecting shaft, the axial direction of the connecting shaft is basically perpendicular to the first direction, and the other of the connecting part and the corresponding clamping jaw is provided with a connecting hole, and the connecting shaft is inserted into the connecting hole; when the movable part slides along the first direction, the two connecting shafts respectively abut against the inner surfaces of the corresponding connecting holes to push the two clamping jaws to rotate relative to the lifting member, so that the two clamping jaws are closed or opened.

7. The lamina lifting device according to claim 6, characterized in that: The clamping jaw can rotate around a first rotation axis relative to the lifting member, and the first rotation axis is basically parallel to the length direction of the connecting shaft; the connecting hole extends along the curved segment, and in the direction from one end to the other end of the curved segment, the minimum distance from each point on the curved segment to the first rotation axis decreases and then increases; the connecting shaft can move in the connecting hole along the extension direction of the curved segment.

8. The lamina lifting device according to claim 5, characterized in that: The driving member is threadedly connected to one end of the lifting member away from the clamping jaw, so that the driving member can rotate relative to the lifting member around a second rotation axis and move along the second rotation axis, and the second rotation axis is substantially parallel to the first direction; The driving member is provided with a driving part, and the driving member can rotate relative to the lifting member around the second rotation axis, so that the driving part abuts against the movable member and pushes the movable member to slide relative to the lifting member.

9. The lamina lifting device according to claim 8, characterized in that: The movable member is provided with a first limiting groove extending along the second rotation axis, and two opposite inner side surfaces of the first limiting groove are distributed along the first direction, the driving part is at least partially located in the first limiting groove and can move in the first limiting groove along the circumferential direction of the second rotation axis, and the driving part is used to abut against the inner side surface of the first limiting groove to push the movable member to slide relative to the lifting member; or, The driving part is provided with a second limiting groove extending along the second rotation axis, and the two opposite inner side surfaces of the second limiting groove are distributed along the first direction. A part of the movable part is located in the second limiting groove and can move circumferentially along the second rotation axis in the second limiting groove, and the inner side surface of the second limiting groove is used to abut against the movable part to push the movable part to slide relative to the lifting part.

10. The lamina lifting device according to claim 4, characterized in that: The lifting member includes a rack extending along the first direction, and the lifting structure includes a gear rotatably connected to the supporting assembly, the gear meshes with the rack, and the gear can rotate relative to the supporting assembly to drive the rack to drive the lifting member to slide along the first direction.

11. The lamina lifting device according to claim 4, characterized in that: The lifting structure also includes a locking mechanism, which is used to lock and unlock the lifting member. When the locking mechanism locks the lifting member, it limits the reverse sliding of the lifting member along the first direction. When the locking mechanism unlocks the lifting member, the lifting member can slide in the reverse direction of the first direction.

12. The lamina lifting device according to claim 11, characterized in that: The lifting member includes a rack extending along the first direction, and the locking mechanism includes a first locking member movably connected to the supporting assembly. The first locking member can move between a locking position and an unlocking position relative to the lifting member. When the first locking member is in the locking position, it engages with the teeth of the rack to lock the lifting member; when the first locking member is in the unlocking position, it disengages from the teeth of the rack to unlock the lifting member.

13. The lamina lifting device according to claim 12, characterized in that: The locking mechanism further comprises an elastic member connected to the supporting assembly or the lifting member, wherein the elastic member is connected to the first locking member to drive the first locking member to move from the unlocking position to the locking position.

14. The lamina lifting device according to claim 4, characterized in that: The lifting member is provided with scales extending along the first direction.

15. The lamina lifting device according to any one of claims 1 to 14, characterized in that: The support assembly includes a support member and a connecting structure that are connected to each other. The lifting assembly is connected to the support member. The connecting structure is used to connect to the nail rod system. In the second direction, the position of the support member relative to the connecting structure is adjustable. The second direction is basically perpendicular to the first direction.

16. The lamina lifting device according to claim 15, characterized in that: The connecting structure includes a connecting member for detachably connecting to the nail rod system, and a second locking member movably connected to the connecting member, the support member can move in the second direction relative to the connecting member, and the second locking member is used to lock the connecting member and the support member to limit the movement of the support member in the second direction relative to the connecting member; the second locking member is also used to unlock the connecting member and the support member so that the support member can move in the second direction relative to the connecting member.

17. The lamina lifting device according to claim 16, characterized in that: The connecting member is provided with a mounting hole extending along the second direction, the supporting member includes a mounting portion, and the mounting portion is slidably mounted in the mounting hole along the second direction; the second locking member is threadedly connected to the connecting member, and the second locking member can be spirally rotated relative to the connecting member to make the second locking member abut against or separate from the supporting member; or, The support member is provided with a strip hole extending along the second direction; the second locking member includes a first locking portion, and the connecting member includes a second locking portion. One of the first locking portion and the second locking portion is provided with a sliding portion, and the sliding portion passes through the strip hole and is threadedly connected to the other of the first locking portion and the second locking portion. The sliding portion can slide in the strip hole along the second direction, and the sliding portion can spirally rotate relative to the other of the first locking portion and the second locking portion to drive the first locking portion and the second locking portion to approach or move away from each other, so that the first locking portion and the second locking portion clamp or release the support member.

18. The lamina lifting device according to claim 17, characterized in that: The connecting piece is used to be detachably connected to the connecting rod of the nail rod system; the connecting piece includes two clamping parts, and the two clamping parts are used to clamp the connecting rod; or, The connecting piece is detachably connected to the pedicle screw of the screw-rod system; the connecting piece comprises a clamping groove, and a part of the pedicle screw is inserted into the clamping groove so that the connecting piece is clamped with the pedicle screw.

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