A multidirectional adjustable cross-link device

Abstract

The application discloses a multidirectional adjustable cross-linking device, which comprises a hook body and a rod body, the hook body is arranged on the left and right sides of the rod body, the hook body comprises a hook and a universal ball head, the hook body and the universal ball head are fixedly connected, the hook body is provided with a first screw hole penetrating through the surface of the hook and a first locking screw, the rod body comprises a first rotating unit, a second rotating unit and an extension cylinder, the extension cylinder comprises a cylinder body and a sliding rod which is slidably connected in the cylinder body, one of the cylinder body and the sliding rod is fixedly connected with the second rotating seat, and the other 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. Through the above scheme, the adaptability of the cross-linking device is improved when the cross-linking device is used to cross-link the rods at different angles and distances.

Description

Technical Field

[0001] This application belongs to the field of medical device technology, and specifically relates to a multi-directional adjustable transverse connection device. Background Technology

[0002] Transverse connectors are widely used in posterior spinal internal fixation surgery to provide spinal stability. Currently, some transverse connectors consist of two connectors and a connecting rod, with the connecting rod only differentiated by length and not adjustable. Some transverse connectors are length-adjustable, but when encountering non-parallel rods, the angle cannot be adjusted, or the angle adjustment is limited. Furthermore, some transverse connectors have large notches, which can easily irritate patient tissues. These issues complicate the surgical procedure, make operation difficult, and affect surgical outcomes. Therefore, a transverse connector that is adjustable in both length and angle while ensuring stability is needed. Summary of the Invention

[0003] This application is 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-connecting device that can be adjusted in length and angle while ensuring stability, thereby improving the adaptability of the cross-connecting device when connecting bars at different angles and distances.

[0004] To address the above problems, the technical solution provided in this application includes:

[0005] A multi-directional adjustable cross-connection device includes a hook body and a rod body, wherein the hook body is disposed on the left and right sides of the rod body; the hook body includes a hook and a universal ball joint; the hook body and the universal ball joint are fixedly connected, and the hook body is provided with a first screw plug hole and a first locking screw plug penetrating 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 joint of one side of the hook body to allow the hook body to adjust its angle relative to the first rotating seat; the first rotor is pivotally connected to the first rotating seat in a first direction and rotates relative to the first rotating seat in a first plane; 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 relative to the second rotating seat in a second direction 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 joint of the hook body on the other side.

[0007] Preferably, the first rotating unit and the second rotating unit are arranged in a mirror image on both sides of the rod.

[0008] Preferably, the hook body includes a curved portion and an extension portion; the curved portion bends towards the middle of the rod body to form an inwardly pointing hook; the extension portion is disposed between the curved portion and the rod body, connecting the rod body and the curved portion; a first screw plug hole is provided on the outer side of the extension portion, the screw plug hole is threadedly engaged with a first locking screw plug, and the screw plug is guided by the thread to move up and down in the screw plug hole, so that after the hook body hooks the rod, the lower end of the first locking screw plug protrudes out of the first screw plug hole and enters the hook formed by the curved portion to abut against the rod, thereby locking the relative position between the hook body and the rod.

[0009] Preferably, the universal ball joint includes: a ball joint, which is fixedly connected to the hook body with a plurality of arc-shaped comb teeth; one end of the comb teeth is fixed to 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 an internally hollow spherical base, and the ball joint is accommodated in the spherical base; the outer surface of the spherical base is formed with an external thread arranged along the spherical surface; a locking nut is sleeved on the periphery of the surface of the spherical base; the locking nut is provided with an internal thread, which engages with the external thread arranged along the spherical surface; when the locking nut rotates, the engagement of the internal thread and the external thread drives the locking nut to compress the comb teeth inward or allow the comb teeth to pop outward, thereby controlling the spherical base to lock or release the ball joint, thereby controlling the locking and adjustment of the relative position between the hook and the rod body.

[0010] Preferably, a thickening block is provided between the hook body and the ball head; a first screw plug hole facing the hook is provided in the vertical direction of the thickening block; when the first locking screw plug moves downward and is in the locked position, the top of the first locking screw plug is lower than the upper surface of the first screw plug hole.

[0011] Preferably, the first rotating unit includes a first rotating base, a first rotor, and a first pivot; the first rotating base includes a front plate, a rear plate, and front and rear connecting plates; the front plate and the rear plate are located at the front and rear, respectively, and the front and rear connecting plates are connected between the front plate and the rear plate; the front plate, the rear plate, and the front and rear connecting plates form a "U" shape arranged along the front-rear direction; the first rotor is pivotally connected to the first rotating base 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; the first pivot and the first rotating base have a threaded engagement, and when the first pivot is operated to rotate relative to the first rotating base, the front plate and the rear plate are squeezed or released under the action of the thread; so as to hold the first rotor in a predetermined position by the squeezing of the front plate and the rear plate or allow the first rotor to rotate without interference from the front plate and the rear plate.

[0012] Preferably, the second rotating unit includes a second rotating seat, a second rotor, and a second pivot; the second rotating seat includes an upper plate, a lower plate, and upper and lower connecting plates; the upper plate and lower plate are located above and below respectively, and the upper and lower connecting plates are connected between the upper plate and the lower plate; the upper plate, lower plate, and upper and lower connecting plates form a "U" shape arranged in the vertical direction; the second rotor is pivotally connected to the second rotating seat by the second pivot; wherein, the second pivot extends in the vertical direction and passes through the upper plate, the second rotor, and the lower plate; the second pivot and the second rotating seat have a threaded engagement, and when the second pivot is operated to rotate relative to the second rotating seat, the upper plate and the lower plate are squeezed or released under the action of the thread; so as to hold the second rotor in a predetermined position by the squeezing of the upper plate and the lower plate or allow the second rotor to rotate without interference from the upper plate and the lower plate.

[0013] Preferably, the cylinder has a sliding hole, which is closed on one side and open on the other side. The sliding rod is slidably disposed in the sliding hole, and a thickened portion is provided on the side of the sliding rod near the closed cylinder. The thickened portion has the same shape and size as the inner wall of the sliding hole. An extension rod is provided on the side of the thickened portion near the opening. The extension rod is thinner than the thickened portion and extends outward from the sliding hole, passing through the opening of the sliding hole and protruding outside the cylinder. The shape and size of the extension rod are the same as the inner wall of the opening.

[0014] Preferably, the sliding hole is cylindrical in shape, and the thickened part is cylindrical or spherical; the cross-sectional shape of the extension rod and the opening is circular.

[0015] Preferably, the cylinder body is provided with a second screw plug hole, which extends through the cylinder body in the vertical direction and is threaded therein. A second locking screw plug, which cooperates with the second screw plug hole, locks the position of the sliding rod when the lower end of the second locking screw plug extends into the sliding hole and abuts against the sliding rod, preventing it from extending or retracting freely.

[0016] Compared to existing technologies, this invention employs a universal joint connection between the hook and the rod. Furthermore, the first rotating unit provides a degree of freedom for forward and backward rotation, the second rotating unit provides a degree of freedom for vertical rotation, and the sliding rod provides lateral extension and retraction; this allows the rod to adaptively adjust its shape according to the engagement angle between the hook and the rod. This provides a greater degree of freedom for various engagements between the hook and the rod. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the structure of the multi-directional adjustable transverse connection device in Embodiment 1 of this patent;

[0019] Figure 2 This is a partial structural schematic diagram of the multi-directional adjustable transverse connecting device in Embodiment 1 of this patent;

[0020] Figure 3 This is a partial structural diagram of the hook body in Embodiment 1 of this patent;

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

[0022] Figure 5 This is a structural diagram of the multi-directional adjustable transverse connecting device in one direction in the first embodiment of the patent;

[0023] Figure 6 This is a cross-sectional view of the multi-directional adjustable transverse connecting device in the first embodiment of the patent, taken along another direction.

[0024] Figure 7 This is a schematic diagram of the structure of the multi-directional adjustable transverse connection device in Embodiment 2 of this patent;

[0025] Figure 8 This is a partial structural schematic diagram of the multi-directional adjustable transverse connecting device in Embodiment 2 of this patent;

[0026] Figure 9 This is a partial structural schematic diagram of the multi-directional adjustable transverse connecting device in Embodiment 2 of this patent;

[0027] Figure 10 This is a partial structural schematic diagram of the multi-directional adjustable transverse connection device in Embodiment 2 of this patent.

[0028] Figure label:

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

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the term "connected" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0032] Throughout the text, the terms “top,” “bottom,” “above,” “below,” and “on top” refer to the relative positions of components of the device, such as the relative positions of the top and bottom substrates within the device. It is understood that the device is multifunctional and independent of its spatial orientation.

[0033] To facilitate understanding of the embodiments of the present invention, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of the present invention.

[0034] Example 1

[0035] like Figures 1-6 As shown, this embodiment provides a multi-directional adjustable horizontal connecting device, which is formed as a horizontally arranged rod, including a rod body 1 and a hook body 2.

[0036] The rod 1 is located in the middle and is rod-shaped as a whole.

[0037] The hook 2 is provided at both ends of the rod 1, that is, a hook 2 is provided at both the left and right ends of the rod, so that the horizontal connecting device can cooperate with the left and right bars respectively through the hook 2.

[0038] The hook 2 includes an extension 3 and a curved portion 4. The curved portion 4 bends towards the middle of the rod to form an inward hook, so as to hook the rod 100 that needs to be locked from the outside. The extension 3 is disposed between the curved portion and the rod, serving to connect the rod and the curved portion.

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

[0040] On the outer side of the extension 3, near the curved portion, a first screw plug hole 6 is provided. This screw plug hole can mate with a first locking screw plug 7. The first locking screw plug 7 and the first screw plug hole 6 are provided with mating threads, which guide the screw plug to move up and down in the screw plug hole. That is, before the hook body hooks the bar, the first locking screw plug 7 is rotated upward to make room for the hook on the hook body, preventing the hook from obstructing the bar when it hooks it. After the hook body hooks the bar, the first locking screw plug is rotated, which moves downward relative to the first screw plug hole under the guidance of the threads. The lower end of the first locking screw plug protrudes from the first screw plug hole and enters the hook formed by the curved portion, abutting against the bar, thereby locking the relative position between the hook body and the bar.

[0041] The extension 3 includes a connecting rod 8, with a ball head 9 on the inner side of the connecting rod and a thickened block 10 on the outer side of the connecting rod.

[0042] The thickened block 10 is formed in the shape of a cuboid. The curved part extends outward and then downward from the thickened block to form a flat hook shape. This hook shape can firmly hook the rod on the one hand, and provide sufficient mechanical strength on the other hand. At the same time, the outer contour of the hook is basically consistent with the contour of the rod, that is, the size along the length of the rod is larger and the shape is consistent with the axial shape of the rod, so as to reduce the disturbance of the hook to the surrounding tissue.

[0043] The thickened block 10 is the area of ​​stress concentration when the hook and rod 100 are connected. The thickened block provides sufficient mechanical strength and facilitates the setting of the first screw plug hole 6 facing the hook in the vertical direction of the thickened block. In particular, the first screw plug hole 6 has sufficient depth in the vertical direction. When the first locking screw 7 moves downward and is in the locked position, the top of the first locking screw 7 is lower than the upper surface of the first screw plug hole 6. That is to say, the first locking screw 7 is sunk in the first screw plug hole, thus avoiding the first locking screw 7 from disturbing the surrounding tissues.

[0044] The ball head 9 is set in the spherical base 11 of the rod body 2. The ball head is spherical in shape. The spherical base is formed by a plurality of arc-shaped comb teeth 12 evenly arranged. One end of the comb teeth 12 is fixed to 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 hollow spherical base.

[0045] On the outer surface of the spherical base, an external thread 13 is formed along the spherical surface. A locking cap 14 is sleeved on the periphery of the spherical base surface. An internal thread is provided inside the locking cap. The internal thread engages with the external thread 13 arranged along the spherical surface. When the locking cap rotates, the engagement of the internal and external threads drives the locking cap 14 to compress the comb teeth inward or allow the comb teeth to pop outward, thereby controlling the spherical base 11 to lock or release the ball head 9, so as to lock or allow the position of the ball head to be adjusted, thereby controlling 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 provided on the rod body.

[0047] The first rotating unit includes a first rotor 15 and a first rotating base 16. The first rotating base 16 includes a front plate, a rear plate, and front and rear connecting plates; the front plate and rear plate are located at the front and rear, respectively, and the front and rear connecting plates are disposed between the front plate and the rear plate. The front plate, rear plate, and front and rear connecting plates form a "U" shape arranged along the front-rear direction. The front and rear connecting plates are fixedly connected to the spherical base, for example, they can be integrally formed; the ends of the front plate and rear plate away from the front and rear connecting plates are free ends, capable of elastic deformation. Both the front plate and the rear plate have a first through hole on their free ends.

[0048] A first rotor 15 is disposed between the front plate and the rear plate, and a through hole is also provided in the connecting end of the first rotor. A first pivot 17 extends in the front-rear direction and passes through the through hole in the front plate, the rotor, and the rear plate. In this way, the first rotor can rotate in the vertical direction relative to the first rotor about the first pivot.

[0049] Furthermore, the pivot may have a threaded front end and a nut at its rear end. A through hole on the rear plate allows the front end of the pivot to pass through while blocking the larger rear end of the pivot from entering the hole. An internal thread matching the threaded front end of the pivot is provided within a through hole on the front plate. When the nut is operated to rotate the pivot, the pivot and the front plate, through the action of the threads, drive the free ends of the front and rear plates closer together or allow them to move away from each other.

[0050] When the front plate and the rear plate approach each other to a predetermined distance, the front plate and the rear plate press against 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 to a predetermined distance, the rotation of the first rotor between the front plate and the rear plate is undisturbed, thereby allowing the first rotor to rotate to a predetermined position.

[0051] Of course, it is understandable that the direction of the thread and nut can also be reversed. The rear end can be threaded and the front end can be nutted. The connection method and working principle are similar to those described above, and will not be elaborated further.

[0052] Furthermore, the rod body includes a second rotating unit, which includes a second rotor 18 and a second rotating base 19. One end of the second rotor 18, i.e., the outer end, is fixedly connected to the inner end of the first rotor 15. If the first rotor 15 is a plate extending in the vertical direction, then the second rotor is a plate extending in the vertical direction.

[0053] The second rotary base 19 includes an upper plate, a lower plate, and upper and lower connecting plates; the upper plate and the lower plate are located at the top and bottom, respectively, and the upper and lower connecting plates are disposed between the upper plate and the lower plate. The upper plate, the lower plate, and the upper and lower connecting plates form a "U" shape arranged along the vertical direction.

[0054] The ends of the upper and lower plates furthest from the connecting plates, i.e., the outer ends, are free ends and can elastically deform. Both the upper and lower plates have a second through hole at their free ends.

[0055] A second rotor 18 is disposed between the upper plate and the lower plate, and the second rotor also has a through hole. A second pivot 20 extends in the front-to-back direction and passes through the through hole in the upper plate, the second rotor, and the lower plate. In this way, the second rotor can rotate about the second pivot relative to the second rotor in the front-to-back direction.

[0056] Furthermore, the lower end of the second pivot may be threaded, and the upper end may be fitted with a nut. A through hole in the upper plate allows the front end of the pivot to pass through while blocking the larger rear end of the pivot from entering. An internal thread matching the thread at the lower end of the second pivot is provided within the through hole in the lower plate. When the nut of the second pivot is operated to rotate it, the second pivot and the lower plate are driven together by the threads, either bringing the free ends of the upper and lower plates closer together or allowing them to move away from each other.

[0057] When the upper plate and the lower plate approach each other to a predetermined distance, the upper plate and the lower plate press against 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 to a predetermined distance, the rotation of the second rotor between the upper plate and the lower plate is undisturbed, thereby allowing the second rotor to rotate to a predetermined position.

[0058] Of course, it is understandable that the direction of the thread and nut can also be reversed, that is, the upper end can be threaded and the lower end can be nutted. The connection method and working principle are similar to those described above, and will not be elaborated further.

[0059] Furthermore, the rod body also includes a telescopic cylinder 21, which is disposed 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 rotating seat, that is, one end of the telescopic cylinder is fixedly connected to the second rotating seat, and the other end of the telescopic cylinder is connected to another hook on the opposite side.

[0060] In this specific embodiment, the fixed connection between the cylinder and the second rotating seat is used as an example. One side of the telescopic cylinder and the second rotating seat can be integrally formed to achieve high strength and a relatively smooth surface. A sliding hole is provided in the cylinder, closed on one side and open on the other side. The sliding rod is slidably disposed in the sliding hole. To maintain smooth sliding, a thickened portion is provided on the side of the sliding rod near the second rotating seat. The thickened portion has the same shape and size as the inner wall of the sliding hole, thus guiding the sliding rod smoothly when it slides within the sliding hole. A sliding rod extension is provided on the side of the thickened portion away from the second rotating component. The extension rod is thinner than the thickened portion and extends outward from the sliding hole, passing through the opening of the sliding hole and protruding outside the cylinder. The shape and size of the extension rod are the same as the inner wall of the opening, meaning the opening is actually narrower relative to the inner wall of the sliding hole. This serves two purposes: firstly, it acts as a limit, preventing the thickened portion from moving further when it reaches its limit position in the direction of the opening; secondly, the sliding hole's support for the thickened portion and the opening's support for the sliding rod create a stable sliding guide, preventing the sliding rod from swaying relative to the cylinder and thus providing stable sliding operation.

[0061] In this specific embodiment, the shape of the sliding hole can be a variety of suitable shapes. For example, the sliding hole as a whole can be a cylindrical hole, and the thickened part can be cylindrical or spherical, thereby providing a stable first support point. The cross-sectional shape of the extension rod and the opening is preferably circular, thereby providing a stable second support point.

[0062] Furthermore, the cylinder 22 is provided with a second screw plug hole 24, which extends through the cylinder in the vertical direction and is threaded. A second locking screw plug 25 is provided in conjunction with this, having an external thread that engages with the internal thread in the second screw plug hole to drive the screw plug to move up and down. When the lower end of the second locking screw plug extends into the sliding hole and abuts against the sliding rod, the second locking screw plug locks the position of the sliding rod, preventing it from extending or retracting freely. When the two disengage, the sliding rod is released, allowing it to slide freely.

[0063] The first rotating unit provides the freedom of rotation in the forward and backward directions, the second rotating unit provides the freedom of rotation in the up and down directions, and the sliding rod provides the extension and retraction in the left and right directions; this allows the rod body to adaptively adjust its shape according to the engagement angle between the hook and the rod. This provides a large degree of freedom for various engagements between the hook and the rod. In other words, when the hook body engages with rods at different angles, not only does the angle of the hook body match the rod, but the rod body can also adjust to different angles and dimensions to accommodate the hook body. This allows for a wide range of adaptation to rods arranged at different angles and distances on the left and right sides of the cross-connecting device, thus providing greater adaptability and avoiding excessive or insufficient connecting and holding forces on the rod, which could cause pressure on the body's tissues.

[0064] In addition to the hooks being provided on both sides of the rod, a set of the first rotating unit and a set of the second rotating unit can also be provided on both sides of the rod. This allows for a wider range of angle adjustments, accommodating greater angle differences and distances between the bars on both sides of the cross-connecting device.

[0065] Example 2

[0066] like Figures 7-10 As shown, this embodiment provides a multi-directional adjustable transverse connection device, which includes an adjustable transverse connection device with the same structure as in Embodiment 1, and improves upon the limitations of the first embodiment in cases where transverse bending bars are required.

[0067] When one of the connected rods is a bent rod, the compatibility between the hook and the bent rod needs to be considered. If the shape of the hook and the degree of curvature of the bent rod do not match, the hook may become loose. Furthermore, when a bent rod with a large curvature is used for transverse connection, stress concentration can easily occur, affecting the implantation effect.

[0068] Therefore, in this second embodiment, a connection structure with multiple hooks is provided in each segment of the cross-connecting device. Specifically, an additional hook 26 is provided at the part of the connecting rod 8 of the hook that exposes the ball head. 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 inserted into or removed from 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 located inside the ring, and the rod extends outward from the sliding ring groove 32 on the ring. A hook seat is connected to the rod, and a channel 33 is provided on the hook seat for the rod to pass through. A screw hole is provided in a direction perpendicular to the channel, and a fixing bolt is provided in the screw hole. The position of the hook seat and the rod is locked by tightening the fixing bolt.

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

[0072] In use, the locking bolts secure the connecting rod 8 of the main hook and the head of the auxiliary pin together by compression. The hook seat is movably mounted on the rod of the auxiliary pin, and the position of the hook seat is fixed by the fixing bolts on the hook seat. The angle of the auxiliary hook body is set by the ball joint between the hook seat and the auxiliary hook body. This allows for the lateral connection between bent bars of various angles.

[0073] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-directional adjustable cross-connection device, comprising a hook body and a rod body, wherein the hook body is disposed on the left and right sides of the rod body; characterized in that: The hook body includes a hook and a universal ball joint; the hook and the universal ball joint are fixedly connected, and the hook is provided with a first screw hole and a first locking screw plug penetrating the surface of the hook; the universal ball joint includes: a ball head, fixedly connected to the hook, and multiple arc-shaped comb teeth; one end of the comb teeth is fixed to the rod body, and the other end of the comb teeth is a free end; the multiple comb teeth are evenly arranged along the spherical surface to form an internally hollow spherical base, and the ball head is accommodated in the spherical base; the outer surface of the spherical base is formed with external threads arranged along the spherical surface; and a locking nut. The locking nut is sleeved around the surface of the spherical base; the locking nut has an internal thread that engages with the external thread arranged along the spherical surface; when the locking nut rotates, the engagement of the internal and external threads drives the locking nut to compress the comb teeth inward or allow the comb teeth to pop outward, thereby controlling the locking or loosening of the ball head on the spherical base, thereby controlling the locking and adjustment of the relative position between the hook and the rod body; the rod body includes a first rotating unit, a second rotating unit, and a telescopic cylinder; in The first rotating unit includes a first rotating base and a first rotor. The first rotating base is connected to the universal ball joint of one side of the hook body to allow the hook body to adjust its angle relative to the first rotating base. The first rotor is pivotally connected to the first rotating base in a first direction and rotates relative to the first rotating base in a first plane. The second rotating unit includes a second rotating base 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 base in a second direction orthogonal to the first direction, and rotates relative to the second rotating base in a second plane orthogonal to the first plane. 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 joint of the hook body on the other side.

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

3. A multi-directional adjustable transverse connection device according to claim 1 or 2, characterized in that, The hook includes a curved portion and an extension portion; The curved section bends toward the middle of the rod to form an inward hook; The extension is disposed between the curved portion and the rod body, connecting the rod body and the curved portion; a first screw plug hole is provided on the outer side of the extension, the first screw plug hole is threadedly engaged with a first locking screw plug, and the first locking screw plug is guided by the thread to move up and down in the first screw plug hole, so that after the hook body hooks the rod, the lower end of the first locking screw plug protrudes out of the first screw plug hole and enters the hook formed by the curved portion to abut against the rod, thereby locking the relative position between the hook body and the rod.

4. A multi-directional adjustable transverse connection device according to claim 1 or 2, characterized in that, A thickened block is arranged between the hook and the ball head; the first screw plug hole is arranged in the up-down direction of the thickened block; when the first locking screw plug moves downward to the locking position, the top end of the first locking screw plug is lower than the upper surface of the first screw plug hole.

5. A multi-directional adjustable transverse connection device according to claim 1 or 2, characterized in that, The first rotating unit comprises a first rotating seat, a first rotor and a first pivot shaft; The first rotating seat comprises a front plate, a rear plate and a front-rear connecting plate; the front plate and the rear plate are located at the front side and the rear side respectively, and the front-rear connecting plate is connected and 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 plate; The first rotor is pivotally connected to the first rotating seat via the first pivot shaft; wherein, the first pivot shaft extends along the front-rear direction and is arranged to pass through the front plate, the first rotor and the rear plate; the first pivot shaft is in threaded fit with the first rotating seat, and when the first pivot shaft 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 threads; so that the first rotor is held at a predetermined position by the squeezing of the front plate and the rear plate, or the first rotor is allowed to rotate without interference from the front plate and the rear plate.

6. A multi-directional adjustable transverse connection device according to claim 1 or 2, characterized in that, The second rotating unit comprises a second rotating seat, a second rotor and a second pivot shaft; The second rotating seat comprises an upper plate, a lower plate and an up-down connecting plate; the upper plate and the lower plate are located at the upper side and the lower side respectively, and the up-down connecting plate is connected and 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 up-down connecting plate; The second rotor is pivotally connected to the second rotating seat via the second pivot shaft; wherein, the second pivot shaft extends along the up-down direction and is arranged to pass through the upper plate, the second rotor and the lower plate; the second pivot shaft is in threaded fit with the second rotating seat, and when the second pivot shaft is operated to rotate relative to the second rotating seat, the upper plate and the lower plate are squeezed or loosened under the action of threads; so that the second rotor is held at a predetermined position by the squeezing of the upper plate and the lower plate, or the second rotor is allowed to rotate without interference from the upper plate and the lower plate.

7. The multi-directional adjustable transverse connecting device according to claim 1 or 2, characterized in that, A sliding hole is arranged in the cylinder body, the sliding hole is closed on one side of the cylinder body, and an opening is arranged on the other side of the cylinder body; A sliding rod is slidably arranged in the sliding hole, a thickened portion is arranged on the side of the sliding rod close to the closed side of the cylinder body, and the shape and size of the thickened portion are consistent with those of the inner wall of the sliding hole; an extension rod is arranged on the side of the thickened portion close to the opening, the size of the extension rod is smaller than that of the thickened portion, the extension rod extends out of the sliding hole, passes through the opening of the sliding hole all the way and is exposed 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.

8. A multi-directional adjustable transverse connection device according to claim 7, characterized in that, The sliding hole is a cylindrical hole as a whole, and the thickened portion is cylindrical or spherical; the cross-sectional shapes of the extension rod and the opening are both circular.

9. A multi-directional adjustable transverse connection device according to claim 8, characterized in that, The cylinder is provided with a second screw plug hole, which extends through the cylinder in the vertical direction and is provided with threads. A second locking screw plug is provided, which cooperates with the second screw plug hole. When the lower end of the second locking screw plug extends into the sliding hole and abuts against the sliding rod, the second locking screw plug locks the position of the sliding rod so that it can no longer extend or retract freely.

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