In-vitro visual centrum adjusting device

Abstract

The utility model discloses an in-vitro visual centrum adjusting device which comprises an artificial centrum, the artificial centrum comprises an adjuster, a rotating nut and a fixing base, at least part of the adjuster is embedded in the fixing base, one part of the rotating nut is arranged on the fixing base in a sleeving mode, and the other part of the rotating nut is arranged on the adjuster in a sleeving mode so as to be in threaded connection with the adjuster; a plurality of circumferentially arranged grooves are formed in the peripheral side of the rotating nut; the holder comprises an adjusting tube and a handle assembly, a plurality of adjusting columns are arranged at the end, facing the artificial vertebral body, of the adjusting tube, the adjusting columns are sequentially arranged at equal intervals in the circumferential direction of the adjusting tube, and the adjusting columns can be matched with the grooves; the handle assembly can penetrate through the adjusting pipe and is connected with the fixing base, and the holder can drive the rotating nut to rotate relative to the fixing base through the adjusting column so as to drive the adjuster to move relative to the fixing base. The adjusting column is matched with the groove, so that the height of the artificial vertebral body can be accurately and rotationally adjusted, and the implanted artificial vertebral body is matched with the original height of a diseased vertebral body of a patient.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an external visual vertebral body adjustment device. Background Technology

[0002] Artificial vertebral bodies are a treatment for conditions such as vertebral burst fractures, kyphosis, and spinal tumors. During surgery, the damaged or diseased vertebra is removed and replaced with a replacement to maintain the spine's normal weight-bearing capacity and physiological curvature. The height of the artificial vertebra must be adjusted during the procedure to ensure it matches the height of the original diseased vertebra, preventing unsatisfactory restoration of spinal height and curvature due to height differences.

[0003] Therefore, there is an urgent need for a new type of instrument for holding and implanting artificial vertebrae to improve the ease of operation for adjusting the height of artificial vertebrae after implantation. Summary of the Invention

[0004] In view of the above-mentioned problems in the prior art, the purpose of this application is to provide a novel holding and implantation device for artificial vertebral bodies, so as to improve the ease of operation for adjusting the height of artificial vertebral bodies after implantation.

[0005] To address the aforementioned problems, this application provides an external visual vertebral body adjustment device, the device comprising:

[0006] An artificial vertebral body includes an adjuster, a rotating nut, and a fixing seat. The adjuster is at least partially embedded in the fixing seat. A portion of the rotating nut is sleeved on the fixing seat, and another portion is sleeved on the adjuster for threaded connection with the adjuster. The outer circumferential side of the rotating nut is provided with a plurality of circumferentially arranged grooves.

[0007] The holder includes an adjusting tube and a handle assembly. The adjusting tube has multiple adjusting posts at one end facing the artificial vertebra, and the multiple adjusting posts are arranged at equal intervals along the circumference of the adjusting tube. The adjusting posts can be adapted to the groove. The handle assembly can pass through the adjusting tube and be connected to the fixed base. The holder can drive the rotating nut to rotate relative to the fixed base through the adjusting posts, so as to drive the adjuster to move relative to the fixed base.

[0008] Preferably, the handle assembly includes a fixing screw and a sleeve, the sleeve and the adjusting tube being sequentially sleeved on the fixing screw, and the fixing screw being screwed to the fixing seat;

[0009] The end of the sleeve facing the adjusting column has an arc-shaped structure, which can fit against the peripheral wall of the fixing seat.

[0010] Preferably, the end of the fixing screw away from the adjusting column is provided with a rotary knob, which is used to rotate the fixing screw to connect the fixing screw to the fixing base.

[0011] Preferably, a limiting ring is provided on the inner wall surface of the sleeve, and a limiting ring groove is provided on the fixing screw at the position corresponding to the limiting ring. The sleeve can be sleeved with the fixing screw through the snap-fit ​​of the limiting ring and the limiting ring groove.

[0012] Preferably, the artificial vertebra is further provided with a locking member, which is located on the fixing seat near the groove and below the movement direction of the adjuster.

[0013] Preferably, a knob is provided at the end of the adjusting tube away from the adjusting column, and the knob is provided with a plurality of first alignment members corresponding to each of the adjusting columns;

[0014] The handle assembly is provided with at least one second alignment member near the knob. The second alignment member can correspond to each of the first alignment members so that the alignment of the groove and the locking member can be determined by the alignment of the first alignment member and the second alignment member.

[0015] Preferably, the number of the first alignment members corresponds to the number of the adjustment columns; and / or, the position of each of the first alignment members corresponds one-to-one with the position of each of the adjustment columns.

[0016] Preferably, the first alignment member is disposed on the end face of the knob opposite to the adjusting column and extends toward the central axis of the adjusting tube so as to be aligned with the second alignment member;

[0017] And / or, along the central axis of the sleeve, the arc-shaped structure at the end of the sleeve is recessed in the direction of the second alignment member; and, when there are multiple second alignment members, at least one second alignment member is disposed on the starting surface of the second alignment member formed by the central axis of the sleeve and the moving direction of the adjuster.

[0018] Preferably, the knob has a connecting hole on its periphery, and the connecting hole can communicate with the cavity of the adjustment tube that accommodates the handle assembly;

[0019] The interior of the connecting hole is provided with a screw assembly, which includes a ball, an elastic element, and a connector. The outer wall of the handle assembly is provided with a receiving ring groove corresponding to the connecting hole, which allows the ball to rotate.

[0020] Preferably, the artificial vertebral body is further provided with a stop member, which is disposed on the adjuster and can pass through the adjuster to prevent the adjuster from disengaging relative to the rotating nut and / or the fixing seat.

[0021] Based on the above technical solution, the external visual vertebral body adjustment device described in this application has the following beneficial effects:

[0022] Precise rotational adjustment is achieved by matching the adjusting post on the adjusting tube with the groove of the rotating nut, thereby finely adjusting the height of the artificial vertebral body to ensure that the implanted artificial vertebral body matches the original height of the patient's diseased vertebral body. The design of the handle assembly connecting to the fixation base ensures that the holder is stably connected to the artificial vertebral body, ensuring that the position of the artificial vertebral body does not shift during adjustment, thus guaranteeing the accuracy and safety of the surgery. Through the cooperation of the rotating nut and the adjuster, it is possible to adapt to the specific condition of different patients' diseased vertebral bodies and provide personalized treatment plans. The holder design allows for precise adjustment outside the body, thereby reducing the risk of needing to make multiple adjustments to the patient during surgery, thus reducing the possibility of surgical trauma and postoperative complications. Therefore, by designing a holder with this structural form, the artificial vertebral body can be implanted more accurately, thereby improving the success rate of surgery and reducing the risk of reoperation due to improper implantation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0024] Figure 1 This is a cross-sectional view of the external vertebral body adjustment device provided in the embodiments of this application.

[0025] Figure 2 yes Figure 1 A magnified view of the area at point Y.

[0026] Figure 3 This is a front view of the gripper provided in the embodiments of this application.

[0027] Figure 4 This is a cross-sectional view of the gripper provided in the embodiments of this application.

[0028] Figure 5 yes Figure 4 Sectional view at point AA.

[0029] Figure 6 yes Figure 4 Sectional view at point BB.

[0030] Figure 7 This is a structural view and enlarged view of the gripper provided in the embodiments of this application from a first perspective.

[0031] Figure 8 This is a structural view and enlarged view of the gripper provided in the embodiments of this application from a second perspective.

[0032] Figure 9 This is a front view of the artificial vertebra provided in the embodiments of this application.

[0033] Figure 10 yes Figure 9 Sectional view at point CC.

[0034] The reference numerals in the attached drawings are as follows: Holder 100; Adjusting tube 11, Adjusting column 111, Knob 112, First alignment member 113, Connecting hole 114, Ball bearing 115, Elastic member 116, Connector 117; Handle assembly 12, Fixing screw 121, Limiting ring groove 1211, Sleeve 122, Receiving ring groove 1221, Moving space 1222, Arc-shaped structure 123, Rotating knob 124, Limiting ring 125, Second alignment member 126, Handle 127; Artificial vertebra 200, Adjuster 21, Rotating nut 22, Groove 221, Fixing seat 23, Locking member 24, Stopping member 25, Threaded hole 26; External vertebral body adjustment device 300; Extending direction of the holder X, Moving direction of the adjuster Y. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0036] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this application. In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0037] like Figures 1-10 As shown, this application discloses an external visual vertebral body adjustment device 300, which includes an artificial vertebral body 200 and a holder 100. The artificial vertebral body 200 is an implant that needs to be implanted into the human body. The holder 100 is used to adjust the artificial vertebral body 200. Specifically, by setting the holder 100 to clamp the artificial vertebral body 200, it is convenient to hold, implant, and adjust the artificial vertebral body 200. Thus, the artificial vertebral body 200 can be implanted into the corresponding position of the diseased vertebral body of the patient through the holder 100.

[0038] like Figures 9-10 As shown, the artificial vertebra 200 includes an adjuster 21, a rotating nut 22, and a fixing seat 23.

[0039] The adjuster 21 is at least partially embedded in the fixed base 23. A portion of the rotating nut 22 is circumferentially rotatably sleeved on the fixed base 23, and another portion is sleeved on the adjuster 21 to be threadedly connected to the adjuster 21. That is, the rotating nut 22 is located at the connection between the fixed base 23 and the adjuster 21. Furthermore, the outer circumferential side of the rotating nut 22 is provided with a plurality of circumferentially arranged grooves 221.

[0040] like Figures 3-8 As shown, the gripper 100 includes an adjustment tube 11 and a handle assembly 12.

[0041] The regulating tube 11 has a plurality of regulating posts 111 at one end. The plurality of regulating posts 111 are arranged at equal intervals along the circumference of the regulating tube 11. The regulating posts 111 are used to adjust the artificial vertebra 200. It can be understood that the regulating posts 111 can be adapted to the grooves 221 on the rotating nut 22, so that the rotating nut 22 can be rotated by rotating the regulating tube 11.

[0042] The handle assembly 12 can be threaded through the adjustment tube 11 and connected to the fixed base 23. The gripper 100 can drive the rotating nut 22 to rotate relative to the fixed base 23 through the adjustment column 111, so as to drive the adjuster 21 to move relative to the fixed base 23.

[0043] In other embodiments, the number of adjustment columns 111 can be set as needed according to actual requirements, for example, it can be determined according to the movement of the adjuster 21 relative to the fixed seat 23.

[0044] Therefore, the adjustment mechanism of the manipulator 100 for the artificial vertebra 200 is as follows: one end of the handle assembly 12 clamps the fixing seat 23 of the artificial vertebra 200 and keeps it stationary. The rotation of the adjusting tube 11 relative to the handle assembly 12 can drive the rotating nut 22 to rotate relative to the fixing seat 23 through the adjusting column 111, thereby driving the adjuster 21, which is screwed to the rotating nut 22, to move relative to the fixing seat 23. The direction of movement of the adjuster 21 relative to the fixing seat 23 is perpendicular to the axis of the adjusting tube 11. Therefore, taking the axis of the adjusting tube 11 as the horizontal direction as an example, when the adjusting tube 11 rotates relative to the handle assembly 12 in the horizontal direction, it can drive the adjuster 21 to move in the vertical direction, thereby achieving the adjustment of the height of the artificial vertebra 200, so that the artificial vertebra 200 can be highly matched with the actual support height required by the patient.

[0045] Therefore, the holder 100 with the above-described structure in this application, through the matching of the adjusting post 111 on the adjusting tube 11 with the groove 221 of the rotating nut 22, can achieve precise rotational adjustment, thereby finely adjusting the height of the artificial vertebra 200 and ensuring that the implanted artificial vertebra 200 matches the original height of the patient's diseased vertebra. The design of the handle assembly 12 being able to connect with the fixing seat 23 ensures that the holder 100 is stably connected to the artificial vertebra 200, ensuring that the position of the artificial vertebra 200 will not shift during the adjustment process, thus ensuring the accuracy and safety of the surgery. Through the cooperation of the rotating nut 22 and the adjuster 21, it can adapt to the specific conditions of different patients' diseased vertebrae and provide personalized treatment plans. The design of the holder 100 allows for precise adjustment outside the body, thereby reducing the risk of needing to make multiple adjustments to the patient during surgery, thus reducing the possibility of surgical trauma and postoperative complications. Therefore, by designing the holder 100 with this structural form, the artificial vertebra 200 can be implanted more accurately, thereby improving the success rate of the surgery and reducing the risk of reoperation due to improper implantation.

[0046] In this embodiment, the handle assembly 12 includes a fixing screw 121 and a sleeve 122. The sleeve 122 and the adjusting tube 11 are sequentially sleeved on the fixing screw 121. The fixing screw 121 can be screwed to the fixing seat 23. Specifically, the fixing seat 23 is provided with a threaded hole 26 that is adapted to the fixing screw 121 for fixing the connection between the fixing screw 121 and the fixing seat 23.

[0047] like Figure 7 As shown, the end of the sleeve 122 facing the adjusting column 111 is provided with an arc-shaped structure 123. The arc-shaped structure 123 can be adapted to the peripheral wall of the fixed seat 23. Specifically, the arc-shaped structure 123 can fit against the peripheral wall of the fixed seat 23 to fix the fit between the handle assembly 12 and the fixed seat 23 and to position the connection between the handle assembly 12 and the fixed seat 23.

[0048] In this embodiment, the gripper 100 achieves its positioning effect with the artificial vertebra 200 through the combined action of the arc-shaped structure 123 and the fixing screw 121. Specifically, after adjusting the peripheral wall of the arc-shaped structure 123 and the fixing seat 23 to fit together, the fixing screw 121 is then locked into the threaded hole 26 of the fixing seat 23.

[0049] It is understandable that the extendable length of the fixing screw 121 relative to the adjusting tube 11 is greater than the length of each adjusting column 111, so that the fixing screw 121 can be embedded in the fixing seat 23 through the threaded hole 26, so as to ensure that the fixing screw 121 can be fixedly connected to the fixing seat 23 during the adjustment of the artificial vertebra 200.

[0050] Furthermore, the arc size of the arc-shaped structure 123 at the end of the sleeve 122 depends on the curvature of the peripheral wall of the fixing seat 23.

[0051] Therefore, the handle assembly 12 with the above-described structure in this application, where the arc-shaped structure 123 adapts to and fits the peripheral wall of the fixation seat 23, not only provides a clear positioning for the handle assembly 12, enabling it to be quickly and accurately positioned when fixed to the fixation seat 23, reducing the time required for adjustment and confirmation during surgery, but also enhances the connection stability between the handle assembly 12 and the fixation seat 23. This reduces the relative displacement between the holder 100 and the artificial vertebral body 200 fixation seat 23 caused by vibration or improper operation during surgery, ensuring the accuracy and safety of adjustment during the procedure. Furthermore, the arc-shaped structure 123 increases the contact area between the sleeve 122 and the fixation seat 23, thereby dispersing the pressure of the fixing screw 121 on the fixation seat 23, reducing local stress concentration, and improving the reliability of the fixed connection.

[0052] like Figures 1-4 As shown, a knob 124 is provided at the end of the fixed screw 121 away from the adjusting column 111. The knob 124 and the fixed screw 121 are fixedly connected to each other so as to rotate the fixed screw 121 to realize its connection with the fixed seat 23.

[0053] like Figure 6 As shown, a limiting ring 125 is provided on the inner wall surface of the sleeve 122, and a limiting ring groove 1211 is provided on the fixing screw 121 at the position corresponding to the limiting ring 125. The sleeve 122 can be sleeved with the fixing screw 121 through the snap-fit ​​of the limiting ring 125 and the limiting ring groove 1211.

[0054] Specifically, such as Figure 1 As shown, the limiting ring 125 is located on the inner wall surface of the sleeve 122, specifically corresponding to the limiting ring groove 1211 on the fixing screw 121; and a moving space 1222 is provided on the inner wall surface of the sleeve 122, and the limiting ring 125 is disposed in the moving space 1222, so that the fixing screw 121 can move in the moving space 1222 along the axial direction of the fixing screw 121 and along the circumferential direction of the fixing screw 121.

[0055] Understandably, the rotary knob 124 is for the operator to pick up and rotate, so as to realize the screw connection between the fixed screw 121 and the threaded hole 26 on the fixed seat 23, thereby enhancing the convenience and tightness of the connection.

[0056] Furthermore, when assembling the handle assembly 12, the limiting ring 125 is first fitted into the limiting ring groove 1211 of the fixing screw 121, and then the limiting ring 125 and the fixing screw 121 are jointly installed into the sleeve 122. After the limiting ring 125 moves to the moving space 1222, due to the fixing effect of the limiting ring 125, the fixing screw 121 will no longer detach from the sleeve 122. This achieves the assembly of the sleeve 122 and the fixing screw 121, avoiding the risk of the fixing screw 121 falling off the sleeve 122 during the use of the handle assembly 12, increasing the overall stability of the handle assembly 12, and ensuring that the surgical process will not be affected by the component falling off.

[0057] like Figures 9-10 As shown, the artificial vertebra 200 in this application is also provided with a locking member 24. Specifically, the locking member 24 is located on the fixing seat 23 near the groove 221 and below the moving direction of the adjuster 21.

[0058] like Figure 8 As shown, a knob 112 is provided at the end of the regulating tube 11 away from the regulating column 111, and a plurality of first alignment members 113 corresponding to each regulating column 111 are provided on the knob 112;

[0059] The handle assembly 12 is provided with at least one second alignment member 126 near the knob 112. The second alignment member 126 can correspond to each of the first alignment members 113, so that the alignment of the first alignment member 113 and the second alignment member 126 can be used to determine whether the locking member 24 is aligned with the groove 221.

[0060] It should be noted that when there is only one second alignment member 126, along the central axis of the sleeve 122, the arc-shaped structure 123 at the end is recessed towards the second alignment member 126 at the center of the end. The second alignment member 126 is disposed on the plane enclosed by the extension direction X of the holder (that is, the central axis of the sleeve 122) and the movement direction Y of the adjuster. The plane can be defined as the starting surface of the second alignment member. Specifically, the following example illustrates the situation with the handle assembly 12 placed horizontally and viewed from the side. When the adjustment post 111 of the handle assembly 12 is placed to the left, the arc-shaped structure 123 at the left end of the sleeve 122 is in a state where the upper and lower ends protrude to the left and the center point in the middle is recessed to the right in the vertical direction. This is the starting surface of the second alignment member. Under the starting surface of the second alignment member 126, regardless of whether there is one or more second alignment members 126, and regardless of whether the number of second alignment members 126 is odd or even, at least one of the second alignment members 126 at the right end of the sleeve 122 can be shown in the side view.

[0061] Preferably, in this embodiment of the application, there are multiple second alignment members 126, and each of the multiple second alignment members 126 corresponds to one of the first alignment members 113. It can be understood that, starting from the second alignment member 126 on the starting surface of the second alignment member 126, the remaining multiple second alignment members 126 are arranged in an array at equal intervals on the peripheral wall of the sleeve 122. The number and position of each second alignment member 126 correspond to the number and position of the first alignment members 113, so as to facilitate intraoperative observation.

[0062] In this way, after the arc-shaped structure 123 at the end of the sleeve 122 and the outer wall of the fixing seat 23 are attached, regardless of whether there is one or multiple second alignment members 126, after marking one of the second alignment members 126, as long as the first alignment member 113 and the marked second alignment member 126 are aligned, the locking member 24 can be aligned with the groove 221. This allows the operator to remove the holder 100 after the height of the artificial vertebra 200 is implanted in the body and the tightening tool such as a screwdriver can pass through the groove 221 of the rotating nut 22 and unscrew the locking member 24 relative to the groove 221 to fix the rotating nut 22 and prevent the rotating nut 22 from loosening and affecting the height of the artificial vertebra 200. This design avoids the need to first determine whether the locking element 24 is located below the groove 221, i.e., to first determine whether the groove 221 on the rotating nut 22 is aligned with the locking element 24. If the locking element 24 and the groove 221 are not aligned, the holder 100 needs to be reconnected and adjusted again. Therefore, the structure of this application can determine whether the groove 221 is aligned with the locking element 24 by using the first alignment element 113 and / or the second alignment element 126 corresponding to the fixing post. The alignment can be visualized outside the body, which effectively improves the convenience and accuracy of operation and reduces the complexity and potential risks of surgical procedures.

[0063] In this embodiment, the threaded hole 26 for fixing the screw 121 and the locking member 24 extend in the same direction. After the arc-shaped structure 123 of the sleeve 122 is fitted and locked with the fixing seat 23 on the artificial vertebra, the threaded hole 26 and the locking member 24 both fall on the plane formed by the adjustment direction Y and the central axis of the handle assembly. This allows the insertion and tightening of the tool to be performed in one direction during operation, further simplifying the operation.

[0064] In this embodiment, the number of first alignment members 113 corresponds to the number of adjustment columns 111, and the position of each first alignment member 113 corresponds one-to-one with the position of each adjustment column 111.

[0065] In this embodiment, the operator can rotate the knob 112 to rotate the adjusting tube 11 relative to the handle assembly 12. Thus, when rotating the adjusting tube 11, the operator can determine the alignment of the locking member 24 and the groove 221 based on the alignment of the first alignment member 113 and the second alignment member 126 on the knob 112.

[0066] In this embodiment, a handle 127 is also provided on the sleeve 122 to facilitate the operator's gripping of the entire handle 100. The rotary knob 124 is partially embedded in the handle 127 to make the entire handle 100 structure more compact.

[0067] Preferably, the second alignment member 126 is disposed on the outer wall of the sleeve 122 between the knob 112 and the handle 127. This arrangement not only makes it easier for the second alignment member 126 to be closer to the first alignment member 113, thus improving the accuracy of alignment, but also makes it easier for the operator to notice when holding the handle 127, thus improving the convenience of operation.

[0068] Furthermore, the first alignment member 113 is disposed on the end face of the knob 112 opposite to the adjusting post 111 and extends toward the central axis of the adjusting tube 11, so as to be aligned with the second alignment member 126. Preferably, both the first alignment member 113 and the second alignment member 126 are grooved structures.

[0069] Specifically, the first groove 113 is provided on the end face of the knob 112 facing the handle 127, and each first groove 113 extends toward the central axis of the adjusting tube 11. It can be understood that the first groove 113 and the second groove 126 are both groove-shaped structures with openings, so that the opening of the first groove 113 can be connected with the opening of the second groove 126 on the sleeve 122, so that each first groove 113 corresponds to each second groove 126 one by one.

[0070] Therefore, by adopting the above-described structural form, the alignment of the locking member 24 and the groove 221 can be determined by the alignment of the first groove 113 and the second groove 126. In other words, when the first groove 113 and the second groove 126 are aligned, the operator can visually see the relative positions of the two grooves and thus infer the alignment of the locking member 24 and the groove 221. This visual alignment indication simplifies the alignment process, reduces operational difficulty, and improves surgical efficiency. The design of the first groove 113 and the second groove 126 provides intuitive visual feedback, allowing the operator to directly understand the adjustment status by observing the alignment of the grooves, without relying on other auxiliary tools or indicators.

[0071] In other embodiments, the first alignment member 113 and the second alignment member 126 may also adopt other structural forms, such as laser marking, pad printing, raised structure or adhesive marker, etc. The specific configuration can be set as needed, as long as the relative position of the locking member 24 and the groove 221 can be determined based on their alignment.

[0072] like Figure 5 As shown, a connecting hole 114 is provided on the periphery of the knob 112, and the connecting hole 114 can communicate with the cavity of the regulating tube 11 that accommodates the handle assembly 12.

[0073] The connecting hole 114 is provided with a screw assembly, which includes a ball 115, an elastic element 116 and a connector 117. The outer wall of the handle assembly 12 is provided with a receiving annular groove 1221 corresponding to the connecting hole 114, and the receiving annular groove 1221 allows the ball 115 to roll.

[0074] In this embodiment of the application, the screw assembly is a ball screw, which has an external thread on its outer wall surface and can be screwed into the connecting hole 114 as a whole.

[0075] The purpose of the screw assembly is as follows: after the screw assembly is screwed into the connecting hole 114, it can form an integral structure with the adjusting tube 11; and the adjusting tube 11 and the handle assembly 12 are detachably connected. After the adjusting tube 11 and the handle assembly 12 are assembled, the screw assembly will be subjected to compressive force, which will compress the elastic element 116, and then cause the ball 115 to retract into the elastic element 116. This ensures the integrity of the holder 100 during surgical operations and postoperative cleaning, and prevents the adjusting tube 11 and the handle assembly 12 from falling off or separating. In addition, this arrangement can also provide guidance for the adjusting tube 11 to rotate along the circumferential direction of the handle assembly 12.

[0076] Specifically, the receiving annular groove 1221 is provided on the outer wall surface of the sleeve 122 so that it can communicate with the connecting hole 114 to allow the ball bearing 115 of the screw assembly to rotate.

[0077] Preferably, there are multiple connecting holes 114. In this embodiment, there are two connecting holes 114, which are symmetrically arranged on both sides of the knob 112. Multiple connecting holes 114 and corresponding receiving ring grooves 1221 can provide multi-point contact, which increases the stability between the adjusting tube 11 and the sleeve 122, reduces the swaying or offset during the adjustment process, provides a balanced distribution of rotational force, and avoids instability or deviation caused by uneven force on one side.

[0078] Therefore, by adopting the above-described structure, a ball bearing 115 is provided inside the connecting hole 114, and a receiving annular groove 1221 is provided on the outer wall of the sleeve 122. The ball bearing 115 can roll within the receiving annular groove 1221, thereby achieving smooth rotation of the adjusting tube 11 relative to the handle assembly 12. This design reduces friction and improves the smoothness of operation. The elastic element 116 provides a certain pressure to the ball bearing 115, ensuring stable rolling of the ball bearing 115 within the receiving annular groove 1221, while also acting as a buffer to reduce vibration during operation and improve the comfort and stability of the surgical procedure.

[0079] like Figures 9-10 As shown, the artificial vertebra 200 in this application is also provided with a stop member 25.

[0080] The stop member 25 is provided on the adjuster 21. After passing through the adjuster 21, the stop member 25 can abut against the inner wall surface of the rotating nut 22 and interfere with the rotating nut 22 to prevent the adjuster 21 from falling off the rotating nut 22 and / or the fixing seat 23.

[0081] Preferably, the protrusion height of the stop member 25 at the end facing the rotating nut 22 is between the outer diameter of the adjuster 21 and the inner diameter of the rotating nut 22, and the protrusion height of the end of the stop member 25 away from the rotating nut 22 is greater than the inner diameter of the adjuster 21, that is, the stop member 25 can pass through the adjuster 21 and both ends of the stop member 25 protrude relative to the adjuster 21.

[0082] In this embodiment, both the locking member 24 and the stop member 25 are screws.

[0083] The foregoing description has fully disclosed the specific embodiments of this application. It should be noted that any modifications made by those skilled in the art to the specific embodiments of this application do not depart from the scope of the claims. Accordingly, the scope of the claims of this application is not limited to the foregoing specific embodiments.

Claims

1. An external visual vertebral body adjustment device, characterized in that, The device includes: An artificial vertebral body includes an adjuster, a rotating nut, and a fixing seat. The adjuster is at least partially embedded in the fixing seat. A portion of the rotating nut is sleeved on the fixing seat, and another portion is sleeved on the adjuster for threaded connection with the adjuster. The outer circumferential side of the rotating nut is provided with a plurality of circumferentially arranged grooves. The holder includes an adjusting tube and a handle assembly. The adjusting tube has multiple adjusting posts at one end facing the artificial vertebra, and the multiple adjusting posts are arranged at equal intervals along the circumference of the adjusting tube. The adjusting posts can be adapted to the groove. The handle assembly can pass through the adjusting tube and be connected to the fixed base. The holder can drive the rotating nut to rotate relative to the fixed base through the adjusting posts, so as to drive the adjuster to move relative to the fixed base.

2. The external visual vertebral body adjustment device according to claim 1, characterized in that, The handle assembly includes a fixing screw and a sleeve, the sleeve and the adjusting tube being sequentially sleeved on the fixing screw, and the fixing screw being screwed to the fixing seat; The end of the sleeve facing the adjusting column has an arc-shaped structure, which can fit against the peripheral wall of the fixing seat.

3. The external visual vertebral body adjustment device according to claim 2, characterized in that, The fixed screw is provided with a rotary knob at the end away from the adjusting column. The rotary knob is used to rotate the fixed screw to connect the fixed screw to the fixed base.

4. The external visual vertebral body adjustment device according to claim 2, characterized in that, The inner wall of the sleeve is provided with a limiting ring, and the fixing screw is provided with a limiting ring groove at the position corresponding to the limiting ring. The sleeve can be sleeved with the fixing screw through the snap-fit ​​of the limiting ring and the limiting ring groove.

5. The external visual vertebral body adjustment device according to claim 1, characterized in that, The artificial vertebra is also provided with a locking component, which is located on the fixing seat near the groove and below the movement direction of the adjuster.

6. The external visual vertebral body adjustment device according to claim 5, characterized in that, The end of the regulating tube away from the regulating column is provided with a knob, and the knob is provided with a plurality of first alignment members corresponding to each of the regulating columns; The handle assembly is provided with at least one second alignment member near the knob. The second alignment member can correspond to each of the first alignment members so that the alignment of the groove and the locking member can be determined by the alignment of the first alignment member and the second alignment member.

7. The external visual vertebral body adjustment device according to claim 6, characterized in that, The number of the first alignment members corresponds to the number of the adjustment columns; and / or, the position of each first alignment member corresponds one-to-one with the position of each adjustment column.

8. The external visual vertebral body adjustment device according to claim 6, characterized in that, The first alignment member is disposed on the end face of the knob opposite to the adjusting column and extends toward the central axis of the adjusting tube so as to be aligned with the second alignment member; And / or, along the central axis of the sleeve, the arc-shaped structure at the end of the sleeve is recessed in the direction of the second alignment member; and, when there are multiple second alignment members, at least one of the second alignment members is disposed on the starting surface of the second alignment member formed by the central axis of the sleeve and the moving direction of the adjuster.

9. The external visual vertebral body adjustment device according to claim 6, characterized in that, The knob has a connecting hole on its periphery, which can communicate with the cavity of the adjustment tube that accommodates the handle assembly. The interior of the connecting hole is provided with a screw assembly, which includes a ball, an elastic element, and a connector. The outer wall of the handle assembly is provided with a receiving ring groove corresponding to the connecting hole, which allows the ball to rotate.

10. The external visual vertebral body adjustment device according to claim 1, characterized in that, The artificial vertebra is also provided with a stop member, which is disposed on the adjuster and can pass through the adjuster to prevent the adjuster from disengaging from the rotating nut and / or the fixing seat.

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