Multidirectional adjustable transverse connecting device

Abstract

The multidirectional adjustable transverse connecting device comprises hook bodies and a rod body, and the hook bodies are arranged on the left side and the right side of the rod body; the hook body comprises a hook and a universal ball head; the hook body is fixedly connected with the universal ball head, and a first screw plug hole and a first locking screw plug which penetrate through the surface of the hook are arranged on the hook body; the rod body comprises a first rotating unit, a second rotating unit and a telescopic cylinder; the telescopic cylinder comprises a cylinder body and a sliding rod connected into the cylinder body in a sliding mode, one of the cylinder body and the sliding rod is fixedly connected with the second rotating base, and the other one of the cylinder body and the sliding rod is directly or indirectly connected with the universal ball head of the hook body on the other side. According to the scheme, the adaptability of the transverse connection device during transverse connection between rods with different angles and distances is improved.

Description

Technical Field

[0001] This application belongs to the technical field of medical devices, and more particularly relates to a multi-directionally adjustable cross-linking device. Background Art

[0002] Cross-linking devices are widely used in posterior spinal fixation surgeries, and their function is to provide spinal stability. Currently, some cross-links generally consist of two connectors and a connecting rod. The connecting rod can only be differentiated by length in terms of specifications and models, and cannot be adjusted in length. Some cross-links can be adjusted in length, but when encountering non-parallel rods, the angle cannot be adjusted, or the angle adjustment is limited. At the same time, some cross-links have large notches and are prone to causing irritation to patient tissues. The above situations make the surgical process complex, difficult to operate, and affect the surgical effect. Therefore, a cross-linking device that can be adjusted in both length and angle while ensuring stability is needed. Summary of the Invention

[0003] This application is precisely proposed based on the above-mentioned needs of the prior art. The technical problem to be solved by this application is to provide a cross-linking device that can be adjusted in both length and angle while ensuring stability, and improve the adaptability of the cross-linking device when cross-linking rods at different angles and distances.

[0004] To solve the above problems, the technical solutions provided by this application include:

[0005] A multi-directionally adjustable cross-linking device includes a hook body and a rod body. The hook bodies are arranged on the left and right sides of the rod body. The hook body includes a hook and a universal ball head. The hook body is fixedly connected to the universal ball head. A first plug hole and a first locking plug are provided on the hook body and penetrate the surface of the hook. The rod body includes a first rotation unit, a second rotation unit, and a telescopic cylinder. The first rotation unit includes a first rotating seat and a first rotor. The first rotating seat is connected to the universal ball head of one of the hook bodies to allow the hook body to adjust the angle relative to the first rotating seat. The first rotor is pivotally connected to the first rotating seat in a first direction and rotates in a first plane relative to the first rotating seat. The second rotation unit includes a second rotating seat and a second rotor. One end of the second rotor is fixedly connected to the first rotor, and the other end of the second rotor is pivotally connected to the second rotating seat in a second direction orthogonal to the first direction and rotates in a second plane orthogonal to the first plane.

[0006] The telescopic cylinder includes a cylinder body and a sliding rod slidably connected to the cylinder body. One of the cylinder body and the sliding rod is fixedly connected to the second rotating seat, and the other of the cylinder body and the sliding rod is directly or indirectly connected to the universal ball head of the other hook body.

[0007] Preferably, the first rotating unit and the second rotating unit are arranged mirror-symmetrically on both sides of the rod body.

[0008] Preferably, the hook body includes a bending portion and an extending portion; the bending portion bends towards the middle of the rod body to form an inward-facing inner hook; the extending portion is arranged between the bending portion and the rod body, connecting the rod body and the bending portion; a first plug hole is arranged on the outer side of the extending portion, and the plug hole is in threaded cooperation with a first locking plug. Under the guidance of the thread, the plug is guided to move up and down in the plug hole. After the hook body hooks the rod, the lower end of the first locking plug protrudes out of the first plug hole and enters the hook formed by the bending portion to abut against the rod, so as to lock the relative position between the hook body and the rod.

[0009] Preferably, the universal ball head includes: a ball head fixedly connected with the hook body; a plurality of arc-shaped comb teeth; one end of each comb tooth is fixed on the rod body, and the other end of each comb tooth is a free end. The plurality of comb teeth are uniformly arranged along the spherical surface to form a spherical base with a hollow interior, and the ball head is accommodated in the spherical base; an external thread is formed on the outer surface of the spherical base and is arranged along the spherical surface; a locking nut is sleeved on the periphery of the surface of the spherical base; an internal thread is arranged in the locking ball cap, and the internal thread meshes with the external thread arranged along the spherical surface; when the locking cap rotates, under the engagement of the internal thread and the external thread, the locking ball cap is driven to press the comb teeth to tighten inward or allow the comb teeth to pop out outward, so as to control the spherical base to lock or loosen the ball head, and thus control the locking and adjustment of the relative position between the hook and the rod body.

[0010] Preferably, a thickening block is arranged between the hook body and the ball head; a first plug hole facing the hook is arranged in the up-down direction of the thickening block; when the first locking plug moves downward to the locking position, the top end of the first locking plug is lower than the upper surface of the first plug hole.

[0011] Preferably, the first rotating unit includes a first rotating seat, a first rotor and a first pivot; the first rotating seat includes a front plate, a rear plate and front and rear connecting plates; the front plate and the rear plate are respectively located in the front and the rear, and the front and rear connecting plates are arranged between the front plate and the rear plate; a "C"-shaped structure is formed between the front plate, the rear plate and the front and rear connecting plates and is arranged along the front-rear direction; the first rotor is pivotally connected to the first rotating seat by the first pivot; wherein, the first pivot extends along the front-rear direction and passes through the front plate, the first rotor and the rear plate; there is a threaded cooperation between the first pivot and the first rotating seat. When the first pivot is operated to rotate relative to the first rotating seat, the front plate and the rear plate are squeezed or loosened under the action of the thread; so as to hold the first rotor in a predetermined position or allow the first rotor to rotate without being interfered by the front plate and the rear plate through the squeezing of the front plate and the rear plate.

[0012] Preferably, the second rotating unit includes a second turntable, a second rotor, and a second pivot; the second turntable includes an upper plate, a lower plate, and an upper and lower connecting plate; the upper plate and the lower plate are respectively located above and below, and the upper and lower connecting plate is arranged between the upper plate and the lower plate; a "C" shape is formed between the upper plate, the lower plate, and the upper and lower connecting plate along the up and down direction; the second rotor is pivotally connected to the second turntable by the second pivot; wherein, the second pivot extends along the up and down direction, passes through the upper plate, the second rotor, and the lower plate; there is a threaded fit between the second pivot and the second turntable, and when the second pivot is rotated relative to the second turntable, the upper plate and the lower plate are squeezed or loosened under the action of the thread; so as to hold the second rotor in a predetermined position by the extrusion of the upper plate and the lower plate or allow the second rotor to rotate without being interfered by the upper plate and the lower plate.

[0013] Preferably, a sliding hole is provided in the cylinder body, the sliding hole is closed on one side of the cylinder body, and an opening is provided on the other side of the cylinder body; the sliding rod is slidably arranged in the sliding hole, a thickened part is arranged on the side of the sliding rod close to the closed cylinder body, and the shape and size of the thickened part are the same as those of the inner wall of the sliding hole; an extension rod is arranged on the side of the thickened part close to the opening, the size of the extension rod is thinner than that of the thickened part, the extension rod extends out of the sliding hole and passes through the opening of the sliding hole to expose outside the cylinder body, and the shape and size of the extension rod are the same as those of the inner wall of the opening.

[0014] Preferably, the whole sliding hole is a cylindrical hole, and the thickened part is cylindrical or spherical; the cross-sectional shapes of the extension rod and the opening are both circular.

[0015] Preferably, a second plug hole is provided on the cylinder body, the second plug hole penetrates the cylinder body along the up and down direction and is provided with threads. A second locking plug, which is matched with the second plug hole, when the lower end of the second locking plug extends into the sliding hole and abuts against the sliding rod, the second locking plug locks the position of the sliding rod so that it can no longer freely expand and contract.

[0016] Compared with the prior art, the present invention adopts a universal joint connection between the hook body and the rod body. And the freedom of rotation in the front and back direction provided by the first rotating unit and the freedom of rotation in the up and down direction provided by the second rotating unit, together with the expansion and contraction in the left and right direction provided by the sliding rod; can allow the rod body to achieve adaptive shape adjustment along with the matching angle between the hook and the rod. Provide a large degree of freedom of matching for various matches between the hook and the rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the embodiments of this specification. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is a schematic structural diagram of the multi-directionally adjustable horizontal connection device in the first embodiment of this patent;

[0019] Figure 2 is a partial structural diagram of the multi-directionally adjustable horizontal connection device in the first embodiment of this patent;

[0020] Figure 3 is a partial structural diagram of the hook body in the first embodiment of this patent;

[0021] Figure 4 is a schematic structural diagram of the first rotating unit and the second rotating unit in the first embodiment of this patent;

[0022] Figure 5 is a structural diagram of the multi-directionally adjustable horizontal connection device in the first embodiment of this patent along one direction;

[0023] Figure 6 is a sectional structural diagram of the multi-directionally adjustable horizontal connection device in the first embodiment of this patent along another direction;

[0024] Figure 7 is a schematic structural diagram of the multi-directionally adjustable horizontal connection device in the second embodiment of this patent;

[0025] Figure 8 is a partial structural diagram of the multi-directionally adjustable horizontal connection device in the second embodiment of this patent;

[0026] Figure 9 is a partial structural diagram of the multi-directionally adjustable horizontal connection device in the second embodiment of this patent;

[0027] Figure 10 is a partial structural diagram of the multi-directionally adjustable horizontal connection device in the second embodiment of this patent.

[0028] Reference numerals:

[0029] Rod body 1; Hook body 2; Extension part 3; Bending part 4; Universal ball head 5; First plug hole 6; First locking plug 7; A connecting rod 8; Ball head 9; Thickening block 10; Rod 100; Spherical base 11; Comb teeth 12; External thread 13; Locking ball cap 14; First rotor 15; First swivel base 16; First pivot 17; Second rotor 18; Second swivel base 19; Second pivot 20; Telescopic cylinder 21; Cylinder body 22; Sliding rod 23; Second plug hole 24; Second locking plug 25; Additional hook 26; Connecting ring 27; Additional pin 28; Hook seat 29; Additional hook body 30; Locking bolt 31; Sliding ring groove 32; Duct 33. Detailed implementation mode

[0030] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, the term "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] The terms "top", "bottom", "above...", "below" and "on..." described throughout the text are relative positions with respect to the components of the device, such as the relative positions of the top and bottom substrates inside the device. It can be understood that the device is multifunctional and is independent of its orientation in space.

[0033] For the convenience of understanding the embodiments of the present invention, the following will further explain with specific embodiments in conjunction with the accompanying drawings. The embodiments do not constitute a limitation to the embodiments of the present invention.

[0034] Embodiment 1

[0035] As Figures 1 - 6 shown, this embodiment provides a multi-directionally adjustable horizontal connection device, which is integrally formed in a rod shape arranged horizontally, and includes a rod body 1 and a hook body 2.

[0036] The rod body 1 is arranged in the middle and is in a rod shape as a whole.

[0037] The hook bodies 2 are arranged at both ends of the rod body 1, that is, one hook body 2 is arranged at each of the left and right ends of the rod body, so that it is convenient for the cross-linking device to cooperate with the rods on the left and right sides through the hook bodies 2 respectively.

[0038] The hook body 2 includes an extension part 3 and a bending part 4. The bending part 4 bends towards the middle of the rod body to form an inward inner hook so as to hook the rod from the outside of the rod 100 to be clamped. The extension part 3 is arranged between the bending part and the rod body and serves to connect the rod body and the bending part.

[0039] On the inner side of the extension part 3, that is, the side close to the rod body, a universal ball head 5 is arranged. The extension part 3 is connected to the rod body 1 through the universal ball head 5, thereby allowing the hook body to perform angular adjustments in three dimensions, namely, the left-right direction, the up-down direction, and the front-back direction, in the three-dimensional space relative to the rod body to adapt to rods arranged at different angles.

[0040] On the outer side of the extension part 3, that is, the side close to the bending part, a first plug hole 6 is arranged. The plug hole can cooperate with a first locking plug 7. The first locking plug 7 and the first plug hole 6 are provided with mutually matching threads, and the plug is guided to move up and down in the plug hole under the guidance of the threads. That is to say, before the hook body hooks the rod, rotate the first locking plug 7 to move upward to create space for the hook on the hook body and avoid obstacles when the hook hooks the rod; when the hook body hooks the rod, rotate the first locking plug so that it moves downward relative to the first plug hole under the guidance of the threads, and the lower end of the first locking plug protrudes out of the first plug hole and enters the hook formed by the bending part to abut against the rod, thereby locking the relative position between the hook body and the rod.

[0041] The extension part 3 includes a connecting rod 8. A ball head 9 is arranged on the inner side of the connecting rod, and a thickening block 10 is arranged on the outer side of the connecting rod.

[0042] The thickening block 10 is integrally formed in the shape of a cuboid. The bending part extends outward and then downward from the thickening block part to form a flat hook shape; this hook shape can, on the one hand, firmly hook the rod, on the other hand, provide sufficient mechanical strength, and at the same time, the outer contour of the hook is basically the same as the contour of the rod, that is, the dimension along the length direction of the rod is larger and is consistent with the shape of the rod axis, so it can reduce the irritation of the hook to the surrounding tissues.

[0043] The thickened block 10 is the area where stress concentration occurs when the hook and the rod 100 are connected. Providing a thickened block part can, on the one hand, provide sufficient mechanical strength, and on the other hand, facilitate the setting of the first plug hole 6 facing the hook in the up-and-down direction of the thickened block. In particular, the first plug hole 6 has sufficient depth in the up-and-down direction. When the first locking plug moves downward to the locked position, the top end of the first locking plug 7 is lower than the upper surface of the first plug hole 6, that is, the first locking plug is sunk in the first plug hole, thus avoiding the irritation of the surrounding tissues by the first locking plug.

[0044] The ball head 9 is arranged in the spherical base 11 of the rod body 2. The ball head is in an overall spherical shape. The spherical base is formed by evenly arranging a plurality of arc-shaped comb teeth 12. One end of the comb teeth 12 is fixed on the rod body, and the other end of the comb teeth is a free end. The plurality of comb teeth are evenly arranged along the spherical surface to form a spherical base with a hollow interior.

[0045] On the outer surface of the spherical base, an external thread 13 arranged along the spherical surface is formed. The locking ball cap 14 is sleeved around the surface of the spherical base. An internal thread is arranged in the locking ball cap, and the internal thread meshes with the external thread 13 arranged along the spherical surface. When the locking cap rotates, under the meshing of the internal thread and the external thread, the locking ball cap 14 is driven to press the comb teeth to tighten inward or allow the comb teeth to pop out outward, thereby controlling the spherical base 11 to lock or loosen the ball head 9, so as to lock or allow the adjustment of the position of the ball head, and thus control the locking and adjustment of the relative position between the hook and the rod body.

[0046] Furthermore, the spherical base 11 is connected to the rod body. Preferably, the spherical base can be connected to the first rotating unit arranged on the rod body.

[0047] The first rotating unit includes a first rotor 15 and a first rotating seat 16. The first rotating seat 16 includes a front plate, a rear plate and front and rear connecting plates; the front plate and the rear plate are respectively located in the front and the rear, and the front and rear connecting plates are arranged between the front plate and the rear plate. A "C" shape arranged along the front and rear directions is formed between the front plate, the rear plate and the front and rear connecting plates. The front and rear connecting plates are fixedly connected to the spherical base. For example, the two can be integrally formed; the ends of the front plate and the rear plate away from the front and rear connecting plates are free ends and can undergo elastic deformation. First through holes are arranged on both the front plate and the rear plate at the free ends.

[0048] The first rotor 15 is arranged between the front plate and the rear plate, and through holes are also arranged in the connecting ends of the first rotor. The first pivot 17 extends along the front and rear directions and passes through the through holes on the front plate, the rotor and the rear plate. In this way, the first rotor can rotate around the first pivot relative to the first rotating seat in the up-and-down direction.

[0049] Further, a front end of the pivot may be provided with a thread and a rear end may be provided with a nut. A through hole on the rear plate allows the front end of the pivot to pass through while blocking a relatively large head of the rear end of the pivot outside the hole. An internal thread mating with the thread at the front end of the pivot is provided in a through hole formed on the front plate. When the nut is operated to rotate the pivot, the pivot and the front plate drive the free ends of the front plate and the rear plate to approach each other or allow the free ends of the front plate and the rear plate to move away from each other through the action of the thread.

[0050] When the front plate and the rear plate approach each other to a predetermined distance, the front plate and the rear plate squeeze the first rotor, thereby holding the first rotor in a predetermined position. When the front plate and the rear plate move away from each other beyond a predetermined distance, the rotation of the first rotor between the front plate and the rear plate is not interfered, thereby allowing the first rotor to rotate to a predetermined position.

[0051] Of course, it can be understood that the setting directions of the thread and the nut may also be opposite to this, the rear end may be provided with a thread, and the front end may be provided with a nut. The connection method and the principle of action are similar to those described above and will not be elaborated in detail.

[0052] Furthermore, the rod body includes a second rotation unit, and the second rotation unit includes a second rotor 18 and a second rotating seat 19. One end of the second rotor 18, that is, the outer end, is fixedly connected to the inner end of the first rotor 15. If the first rotor 15 is a plate-shaped extending along the up-and-down direction, then the second rotor is a plate-shaped extending along the vertical direction.

[0053] The second rotating seat 19 includes an upper plate, a lower plate and an upper and lower connecting plate; the upper plate and the lower plate are respectively located above and below, and the upper and lower connecting plate is arranged between the upper plate and the lower plate. An "L"-shape arranged along the up-and-down direction is formed between the upper plate, the lower plate and the upper and lower connecting plate.

[0054] One ends of the upper plate and the lower plate away from the upper and lower connecting plate, that is, the outer ends, are free ends and can elastically deform. Second through holes are provided on both the upper plate and the lower plate at the free ends.

[0055] The second rotor 18 is arranged between the upper plate and the lower plate, and through holes are also provided on the second rotor. A second pivot 20 extends along the front up-and-down direction and passes through the through holes on the upper plate, the second rotor and the lower plate. In this way, the second rotor can rotate relative to the second rotating seat around the second pivot in the front-rear direction.

[0056] Further, the lower end of the second pivot may be provided with a thread, and the upper end may be provided with a nut. The through hole formed in the upper plate allows the front end of the pivot to pass through while blocking the larger head at the rear end of the pivot outside the hole. An internal thread matching the thread at the lower end of the second pivot is provided in the through hole formed in the lower plate. When the nut of the second pivot is operated to rotate the second pivot, the second pivot and the lower plate drive the free ends of the upper plate and the lower plate to approach each other or allow the free ends of the upper plate and the lower plate to move away from each other through the action of the thread.

[0057] When the upper plate and the lower plate approach each other to a predetermined distance, the upper plate and the lower plate squeeze the second rotor, thereby holding the second rotor in a predetermined position. When the front plate and the rear plate move away from each other beyond a predetermined distance, the rotation of the second rotor between the upper plate and the lower plate is not interfered, thereby allowing the second rotor to rotate to a predetermined position.

[0058] Of course, it can be understood that the setting directions of the thread and the nut can also be opposite, that is, the upper end may be provided with a thread and the lower end may be provided with a nut. The connection method and the principle of action are similar to those described above and will not be elaborated in detail.

[0059] Furthermore, the rod body further includes a telescopic cylinder 21. The telescopic cylinder is arranged in the middle of the rod body. The telescopic cylinder includes a cylinder body 22 and a sliding rod 23. One of the cylinder body and the sliding rod is fixedly connected to the second swivel base, that is, one end of the telescopic cylinder is fixedly connected to the second swivel base, and the other end of the telescopic cylinder is connected to another hook on the opposite side.

[0060] In this specific embodiment, the case where the cylinder body is fixedly connected to the second rotating base is taken as an example for illustration. One side of the telescopic cylinder and the second rotating base can be integrally formed to have relatively high strength and a relatively smooth surface. A sliding hole is provided in the cylinder body, which is closed on one side of the cylinder body and has an opening on the other side of the cylinder body. The sliding rod is slidably disposed in the sliding hole. In order to maintain smooth sliding, a thickened portion is provided on the side of the sliding rod close to the second rotating base, and the shape and size of the thickened portion are consistent with those of the inner wall of the sliding hole, so that when the sliding rod slides in the sliding hole, it can be smoothly guided. A sliding rod is provided on the side of the thickened portion away from the second rotating member, and the size of the extension rod is thinner than that of the thickened portion. The extension rod extends out of the sliding hole and passes through the opening of the sliding hole to expose outside the cylinder body. The shape and size of the extension rod are the same as those of the inner wall of the opening, that is, the opening is actually narrowed relative to the inner wall portion of the sliding hole. On the one hand, this can play a limiting role, that is, when the thickened portion moves towards the opening to the extreme position, it will be blocked by the opening and its continuous movement will be restricted. On the other hand, on the sliding rod, based on the support of the sliding hole for the thickened portion and the support of the opening for the sliding rod, a stable sliding guide can be formed to avoid the shaking of the sliding rod relative to the cylinder body, thereby providing a stable sliding operation.

[0061] In this specific embodiment, the shape of the sliding hole can be various suitable shapes. For example, the sliding hole as a whole can be a cylindrical hole, and the thickened portion can be cylindrical or spherical, so as to provide a stable first support point. The cross-sectional shapes of the extension rod and the opening are preferably both circular, so as to provide a stable second support point.

[0062] Further, a second plug hole 24 is provided on the cylinder body 22. The second plug hole penetrates the cylinder body along the up and down direction and is provided with threads therein. A second locking plug 25 is provided in cooperation therewith. The second locking plug is provided with external threads and meshes with the internal threads in the second plug hole to drive the plug to move up and down. When the lower end of the second locking plug extends into the sliding hole and abuts against the sliding rod, the second locking plug locks the position of the sliding rod so that it can no longer freely expand and contract. When they are out of contact, the sliding rod is released to be able to slide freely.

[0063] Through the degree of freedom of forward and backward rotation provided by the first rotation unit and the degree of freedom of up and down rotation provided by the second rotation unit, combined with the left and right telescoping of the sliding rod; the rod body can be allowed to adaptively adjust its shape according to the matching angle between the hook and the rod. A large degree of freedom of cooperation is provided for various cooperations between the hook and the rod. That is to say, when the hook body cooperates with rods at different angles, not only the angle of the hook body matches the rod, but also the rod body can adjust different angles and dimensions in cooperation with the hook body. In this way, it is possible to adapt to rods arranged on the left and right sides of the cross-linking device at different angles and distances within a large range, thereby providing adaptability within a large range and avoiding applying too large or insufficient connection holding force to the rod, which may cause compression of the body tissues by the rod.

[0064] In addition to arranging the hook bodies on both the left and right sides of the rod body, a set of the first rotation unit and the second rotation unit can also be arranged on both sides of the rod body. This can provide a larger range of angle adjustment in terms of size, adapting to a larger range of angle differences and distances between the rods on both sides of the cross-linking device.

[0065] Embodiment 2

[0066] As Figures 7 - 10 shown, this embodiment provides a multi-directionally adjustable cross-linking device, which includes an adjustable cross-linking device with exactly the same structure as that in Embodiment 1, and improvements are made to the limitations in the first embodiment for occasions where cross-linking of bent rods is required.

[0067] When one of the rods to be connected is a bent rod, the matching between the hook and the bent rod needs to be considered. When the shape of the hook does not match the bending degree of the bent rod, the hook may become loose. And when cross-linking bent rods with a large curvature, stress concentration is likely to occur, affecting the implantation effect.

[0068] Therefore, in this Embodiment 2, a connection structure for multiple hooks is provided for each section of the cross-linking device. Specifically, an additional hook 26 is provided at the part of the connecting rod 8 of the hook where the ball head is exposed. The additional hook includes a connecting ring 27, an additional pin 28, a hook seat 29, and an additional hook body 30.

[0069] The connecting ring is sleeved on the outer periphery of the connecting rod 8. One side of the connecting ring is provided with a locking bolt 31 that can be selected into or out of the ring, and the other side of the connecting ring is provided with a sliding ring groove along the circumferential direction.

[0070] The head of the additional pin is arranged inside the ring, and the rod part extends outward from the sliding ring groove 32 on the ring. A hook seat is connected to the rod part, and a hole 33 is provided on the hook seat for the rod part to pass through. A screw hole is provided in a direction perpendicular to the hole, and a fixing bolt is arranged in the screw hole to lock the position of the hook seat and the rod part by tightening the fixing bolt.

[0071] The hook body structures of the additional hook body and the main hook (i.e., the aforementioned hook) are the same, and the additional hook body and the hook seat can be connected through the same ball head structure as described above.

[0072] In use, the locking bolt fixes the connecting rod 8 of the main hook and the head of the additional pin together by extrusion. The rod part of the additional pin is movably provided with the hook seat, the position of the hook seat is fixed by the fixing bolt on the hook seat, and the angle of the additional hook body is set through the ball head between the hook seat and the additional hook body. In this way, the transverse connection between bent rods at various angles can be satisfied.

[0073] The specific embodiments described above have further elaborated on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-directionally adjustable horizontal connection device, comprising a hook body and a rod body, wherein the hook bodies are arranged on the left and right sides of the rod body; characterized in that: The hook body includes a hook and a universal ball head; the hook body is fixedly connected to the universal ball head, and a first plug hole and a first locking plug are provided on the hook body and penetrate the surface of the hook; The rod body includes a first rotating unit, a second rotating unit and a telescopic cylinder; Wherein The first rotating unit includes a first rotating seat and a first rotor. The first rotating seat is connected to the universal ball head of the hook body on one side to allow the hook body to adjust the angle relative to the first rotating seat; the first rotor is pivotally connected to the first rotating seat in a first direction and rotates in a first plane relative to the first rotating seat; The second rotating unit includes a second rotating seat and a second rotor. One end of the second rotor is fixedly connected to the first rotor, and the other end of the second rotor is pivotally connected to the second rotating seat in a second direction orthogonal to the first direction and rotates in a second plane orthogonal to the first plane relative to the second rotating seat; The telescopic cylinder includes a cylinder body and a sliding rod slidably connected in the cylinder body. One of the cylinder body and the sliding rod is fixedly connected to the second rotating seat, and the other of the cylinder body and the sliding rod is directly or indirectly connected to the universal ball head of the hook body on the other side.

2. The multi-directionally adjustable transverse connection device according to claim 1, characterized in that The first rotating unit and the second rotating unit are arranged mirror-symmetrically on both sides of the rod body.

3. The multi-directionally adjustable transverse connection device according to claim 1 or 2, characterized in that The hook body includes a bending part and an extending part; The bending part bends towards the middle of the rod body to form an inward-facing inner hook; The extending part is arranged between the bending part and the rod body and connects the rod body and the bending part; a first plug hole is provided on the outer side of the extending part, and the plug hole is in threaded cooperation with the first locking plug. Under the guidance of the thread, the plug is guided to move up and down in the plug hole. After the hook body hooks the rod, the lower end of the first locking plug protrudes out of the first plug hole and enters the hook formed by the bending part to abut against the rod, so as to lock the relative position between the hook body and the rod.

4. A multi-directionally adjustable transverse connection device according to claim 1 or 2, characterized in that, The universal ball head includes: A ball head fixedly connected to the hook body with a plurality of arc-shaped comb teeth; One end of the comb teeth is fixed on the rod body, and the other end of the comb teeth is a free end. A plurality of comb teeth are evenly arranged along the spherical surface to form a spherical base with a hollow interior, and the ball head is accommodated in the spherical base; an external thread is formed on the outer surface of the spherical base and is arranged along the spherical surface; A locking nut is sleeved on the periphery of the surface of the spherical base; an internal thread is provided in the locking nut, and the internal thread meshes with the external thread arranged along the spherical surface; when the locking nut rotates, under the engagement of the internal thread and the external thread, the locking nut is driven to press the comb teeth to tighten inward or allow the comb teeth to pop out outward, so as to control the spherical base to lock or loosen the ball head, and thus control the locking and adjustment of the relative position between the hook and the rod body.

5. The multi-directionally adjustable horizontal connection device according to claim 1 or 2, characterized in that A thickening block is provided between the hook body and the ball head; a first plug hole facing the hook is provided in the up-down direction of the thickening block; when the first locking plug moves downward to the locking position, the top end of the first locking plug is lower than the upper surface of the first plug hole.

6. The multi-directionally adjustable transverse connection device according to claim 1 or 2, characterized in that, The first rotating unit includes a first rotating base, a first rotor and a first pivot shaft. The first rotating base includes a front plate, a rear plate and front-rear connecting plates; the front plate and the rear plate are respectively located in the front and the rear, and the front-rear connecting plates are arranged between the front plate and the rear plate; a "C" shape arranged along the front-rear direction is formed among the front plate, the rear plate and the front-rear connecting plates. The first rotor is pivotally connected to the first rotating base by the first pivot shaft; wherein, the first pivot shaft extends along the front-rear direction and passes through the front plate, the first rotor and the rear plate; there is a threaded fit between the first pivot shaft and the first rotating base. When the first pivot shaft is operated to rotate relative to the first rotating base, the front plate and the rear plate are squeezed or loosened under the action of the thread; so as to hold the first rotor in a predetermined position by the extrusion of the front plate and the rear plate or allow the first rotor to rotate without being interfered by the front plate and the rear plate.

7. A multi-directionally adjustable cross-connecting device according to claim 1 or 2, characterized in that, The second rotating unit includes a second rotating base, a second rotor and a second pivot shaft. The second rotating base includes an upper plate, a lower plate and upper-lower connecting plates; the upper plate and the lower plate are respectively located above and below, and the upper-lower connecting plates are arranged between the upper plate and the lower plate; a "C" shape arranged along the up-down direction is formed among the upper plate, the lower plate and the upper-lower connecting plates. The second rotor is pivotally connected to the second rotating base by the second pivot shaft; wherein, the second pivot shaft extends along the up-down direction and passes through the upper plate, the second rotor and the lower plate; there is a threaded fit between the second pivot shaft and the second rotating base. When the second pivot shaft is operated to rotate relative to the second rotating base, the upper plate and the lower plate are squeezed or loosened under the action of the thread; so as to hold the second rotor in a predetermined position by the extrusion of the upper plate and the lower plate or allow the second rotor to rotate without being interfered by the upper plate and the lower plate.

8. The multi-directionally adjustable horizontal connecting device according to claim 1 or 2, wherein A sliding hole is provided in the cylinder body. The sliding hole is closed on one side of the cylinder body and an opening is provided on the other side of the cylinder body. An extension rod is slidably arranged in the sliding hole. A thickening part is provided on the side of the extension rod close to the closed cylinder body. The shape and size of the thickening part are consistent with those of the inner wall of the sliding hole; an extension rod is provided on the side of the thickening part close to the opening. The size of the extension rod is thinner than that of the thickening part. The extension rod extends out of the sliding hole and passes through the opening of the sliding hole to expose outside the cylinder body. The shape and size of the extension rod are the same as those of the inner wall of the opening.

9. The multi-directionally adjustable transverse connection device according to claim 8, characterized in that, The sliding hole is a cylindrical hole as a whole. The thickening part is cylindrical or spherical; the cross-sectional shapes of the extension rod and the opening are both circular.

10. The multi-directionally adjustable transverse connection device according to claim 9, characterized in that, A second plug hole is provided on the cylinder body. The second plug hole penetrates the cylinder body along the up and down direction and has a thread therein. A second locking plug is engaged with the second plug hole. When the lower end of the second locking plug extends into the sliding hole and abuts against the sliding rod, the second locking plug locks the position of the sliding rod so that it can no longer freely expand and contract.

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