Fixing mechanism for tracer device and tracer device

Abstract

The invention provides a tracer device and a fixing mechanism thereof, the fixing mechanism comprises a fixing seat and a fixer, the fixing seat comprises a seat body and an adjusting screw rod rotatably connected to the seat body, the seat body is provided with a sliding rail extending in the same direction as the adjusting screw rod, and the sliding rail is provided with a sliding groove; a first thread part and a second thread part which are opposite in thread turning direction are arranged on the adjusting screw rod; the fixator comprises two fixing assemblies, the fixing assemblies are connected to the sliding rail in a sliding mode, the two fixing assemblies are connected to the first threaded part and the second threaded part in a threaded mode respectively, and the fixing assemblies are used for being detachably connected with kirschner wires. According to the fixing mechanism, independent arrangement of the two kirschner wires is achieved by arranging the two fixing assemblies, the stability of the tracer body is improved, an operator can rotate the adjusting screw to enable the two fixing assemblies to move oppositely or oppositely at the same time, and rapid adjustment of the distance between the two kirschner wires is achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, and particularly relates to a fixing mechanism for a tracer device and the tracer device. BACKGROUND

[0002] In surgery using a spinal robot, a tracer needs to be fixed on the spinous process of a patient, and then an optical tracking system is used to track and locate the tracer to assist the surgeon in accurately completing the surgery. In the prior art, a spinous process clamp or other fixing mechanism is often used, which requires a large incision on the back of the patient and exposes the spinous process of the patient, and then the tracer is fixed on the spinous process by clamping the spinous process with the clamp head of the fixing mechanism. However, this method has the problems of large incision area, large amount of bleeding, slow postoperative recovery, and insecure fixation. SUMMARY

[0003] The present application aims to provide a fixing mechanism for a tracer device and the tracer device, which aims to solve the technical problems of large incision area, large amount of bleeding, slow postoperative recovery, and insecure fixation of the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0005] In a first aspect, a fixing mechanism for a tracer device is provided, comprising:

[0006] A fixing seat comprising a seat body and an adjusting screw rotatably connected to the seat body, the seat body being provided with a sliding rail extending in the same direction as the adjusting screw, and the adjusting screw being provided with a first threaded portion and a second threaded portion having equal thread pitches and opposite thread directions;

[0007] A fixing device comprising two fixing components, each of the fixing components being slidably connected to the sliding rail, and the two fixing components being screwed to the first threaded portion and the second threaded portion, respectively, and the fixing components being used for detachably connecting Kirschner wires.

[0008] In one embodiment of the first aspect, the fixing component comprises a first connecting rod, a first clamping block, a second clamping block, a screwing block, and a first locking member, the screwing block being slidably connected to the sliding rail, the screwing blocks of the two fixing components being screwed to the first threaded portion and the second threaded portion, respectively, one side of the screwing block away from the seat body being fixedly connected to the first connecting rod, the first connecting rod being arranged through the second clamping block and the first clamping block, and the other end of the first connecting rod being connected to the first locking member, and the second clamping block being arranged opposite to the first clamping block and used for jointly clamping Kirschner wires.

[0009] In one of the embodiments of the first aspect, the fixing assembly further comprises a first elastic member located between the first clamping block and the second clamping block, and the first elastic member provides an elastic force for moving the first clamping block away from the second clamping block.

[0010] In one of the embodiments of the first aspect, the fixing assembly further comprises a second connecting rod and a second locking member, the threaded block is connected to one end of the second connecting rod, and the second locking member is connected to the other end of the second connecting rod, and the second locking member abuts against the seat body to prevent the threaded block from sliding relative to the seat body.

[0011] In one of the embodiments of the first aspect, a side of the first clamping block facing the second clamping block is provided with at least one first clamping groove, and / or a side of the second clamping block facing the first clamping block is provided with at least one second clamping groove.

[0012] In one of the embodiments of the first aspect, the first clamping block is provided with two first clamping grooves with arc-shaped cross sections, the second clamping block is provided with two second clamping grooves with arc-shaped cross sections, the first clamping grooves and the second clamping grooves are oppositely arranged, and the arc surface radius corresponding to the first clamping grooves is not equal to the arc surface radius corresponding to the second clamping grooves.

[0013] In one of the embodiments of the first aspect, the fixing assembly further comprises a third clamping block fixedly connected to a side of the threaded block facing the second clamping block, and the third clamping block and the second clamping block are respectively provided with a first rotating part and a second rotating part on the two facing surfaces thereof, and the first rotating part and the second rotating part are rotationally connected to allow the third clamping block and the second clamping block to relatively rotate in the direction of the axis of the first connecting rod.

[0014] In one of the embodiments of the first aspect, the seat body is provided with a scale along the sliding rail direction, and the fixing assembly is provided with an identifier for indicating the scale.

[0015] In the second aspect, a tracer device is provided, which comprises a tracer body and a fixing mechanism as described in the above embodiments, and the tracer body is connected to the seat body.

[0016] In one of the embodiments of the second aspect, the tracer body is connected to the fixing seat through a connector, the connector comprises a limiting rod, a first limiting head and a second limiting head connected to the limiting rod, a chuck assembly and a supporting member, the first limiting head and the second limiting head are respectively connected to the two ends of the limiting rod and can move towards or away from each other, the chuck assembly and the supporting member are located between the first limiting head and the second limiting head, the chuck assembly is used for clamping the fixing seat, and the supporting member is connected to the tracer body.

[0017] The technical effect of the present application relative to the prior art is that the fixing mechanism realizes the detachable connection of the two Kirschner wires by setting two fixing assemblies, the surgical process is fixed by inserting the two Kirschner wires into the spinous process, which reduces the wound area and the amount of bleeding, accelerates postoperative recovery, improves the stability of the tracer fixing, and in addition, the fixing mechanism sets the first threaded part and the second threaded part with opposite rotation directions on the adjusting screw, and screws the two fixing assemblies of the slide rail slidingly connected to the seat body on the first threaded part and the second threaded part, respectively, so that the operator can rotate the adjusting screw to move the two fixing assemblies simultaneously towards each other or away from each other, realizing the quick adjustment of the distance between the two Kirschner wires, and the distance between the two Kirschner wires can be adjusted according to the surgical site and the anatomical shape of the spinous process of the patient during use, thereby expanding the use scenarios and range. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application or the prior art description. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 is a perspective view of the tracer device provided by the embodiment of the present application;

[0020] Figure 2 is an exploded view of the fixing mechanism of the tracer device in Figure 1

[0021] Figure 3 is a sectional view of the fixing assembly in the fixing mechanism in Figure 1

[0022] Figure 4 is a partial structure view of the fixing assembly in the fixing mechanism in Figure 1

[0023] Figure 5 is a perspective view of the second clamping block in Figure 1

[0024] Figure 6 is an exploded view of the connector in Figure 1

[0025] Figure 7 is an exploded view of the tracer body in Figure 1

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] ​​​​​​100, fixing mechanism; 10, fixing seat; 11, seat body; 1101, sliding rail; 111, scale; 12, adjusting screw; 121, first threaded part; 122, second threaded part; 13, seat rod; 20, fixator; 21, fixing assembly; 211, first connecting rod; 212, first clamping block; 2121, first clamping groove; 2122, first connecting hole; 2123, first mounting groove; 213, second clamping block; 2131, second clamping groove; 2132, second connecting hole; 2101, first clamping surface; 2102, second clamping surface; 2133, first rotating part; 2133a, convex strip; 2130, first rotating surface; 214, screwing block; 215, first locking piece; 2151, first gasket; 216, first elastic piece; 217, second locking piece; 2171, second gasket; 218, second connecting rod; 219, third clamping block; 2191, second rotating part; 2190, second rotating surface; 2191a, strip-shaped groove; 2192, second mounting groove; 2193, mark; 200, tracer body; 300, connector; 31, limiting rod; 32, first limiting head; 33, second limiting head; 34, chuck assembly; 341, first chuck; 342, second chuck; 343, second elastic piece; 3401, pin structure; 35, supporting piece; 351, tooth structure; 3511, first annular gear; 3512, second annular gear; 41, bracket; 42, array connector; 421, inner hole; 43, reflective bead; 44, cylindrical plug; 45, pin; 90, kirschner wire. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described below in detail with reference to examples thereof illustrated in the accompanying drawings, in which like or similar elements or components throughout the drawings are denoted by the same or similar reference numerals, and the embodiments described below are merely examples for explaining the present application and are not to be understood as limiting the present application.

[0029] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0030] In addition, the terms "first", "second", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0031] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0032] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples.

[0033] Please refer to Figure 1 The embodiment of the present application provides a tracer device and a fixing mechanism 100 for the tracer device, the tracer device comprises a tracer body 200, a connector 300 and the fixing mechanism 100, the tracer body 200 is connected to the fixing mechanism 100 through the connector 300. The tracer body 200 is used to track the change of bone structure or the pose state during the operation process, and the fixing mechanism 100 is used to fixedly connect the tracer body 200 to the bone structure.

[0034] Please refer to Figure 2 The fixing mechanism 100 comprises a fixing seat 10 and a fixing device 20.

[0035] The fixing seat 10 comprises a seat body 11 and an adjusting screw 12 rotatably connected to the seat body 11, the seat body 11 is provided with a sliding rail 1101 extending in the same direction as the adjusting screw 12, and the adjusting screw 12 is provided with a first threaded portion 121 and a second threaded portion 122 with opposite screw threads. It can be understood that the first threaded portion 121 extends in a straight line, and the second threaded portion 122 also extends in a straight line, and the center axis of the first threaded portion 121 and the center axis of the second threaded portion 122 can coincide or be parallel. Among them, the adjusting screw 12 extends in a straight line, and the first threaded portion 121 and the second threaded portion 122 are arranged in sequence along the extension direction of the adjusting screw 12.

[0036] The fixer 20 comprises two fixing assemblies 21, each of which is slidingly connected to the slide rail 1101, and the two fixing assemblies 21 are respectively screwed to the first threaded part 121 and the second threaded part 122, and the fixing assembly 21 is used for detachably connecting the Kirschner wire 90.

[0037] The fixing mechanism 100 achieves detachable connection and separate setting of the two Kirschner wires 90 by setting the two fixing assemblies 21, and the surgical process is fixed by inserting the two Kirschner wires 90 into the spinous process to fix the tracer body 200, which reduces the wound area and the amount of bleeding, speeds up postoperative recovery, and improves the stability of the tracer body 200. The fixing mechanism 100 sets the first threaded part 121 and the second threaded part 122 with opposite rotation directions on the adjusting screw 12, and screws the two fixing assemblies 21 slidingly connected to the slide rail 1101 on the seat body 11 to the first threaded part 121 and the second threaded part 122, respectively. When the operator rotates the adjusting screw 12, the two fixing assemblies 21 can be moved towards each other or away from each other at the same time, which realizes quick adjustment of the distance between the two Kirschner wires 90, saves operation time, and adjusts the distance between the two Kirschner wires 90 according to the surgical site and the anatomical shape of the spinous process of the patient during use, which expands the use scene and range. At the same time, the two Kirschner wires 90 can be independently fixed by the two fixing assemblies 21, so as to realize independent adjustment of the position and angle of the two Kirschner wires 90, so that the two Kirschner wires 90 can be fixed at different vertebral body positions of the spine at the same time, which improves the stability of the connection between the fixing mechanism 100 and the spine, thereby ensuring the navigation accuracy during the operation process.

[0038] Optionally, the first threaded part 121 and the second threaded part 122 have equal pitches, so that the moving speed of the two fixing assemblies 21 is equal when the adjusting screw 12 is rotated, which is convenient for the operator to grasp the distance between the two fixing assemblies 21.

[0039] In some embodiments, referring to Figure 2 and Figure 3 , the fixing assembly 21 comprises a first connecting rod 211, a first clamping block 212, a second clamping block 213, a screwing block 214, and a first locking piece 215.

[0040] The screwing block 214 is slidingly connected to the slide rail 1101, and the screwing blocks 214 of the two fixing assemblies 21 are respectively screwed to the first threaded part 121 and the second threaded part 122. In this way, the two fixing assemblies 21 are respectively screwed to the first threaded part 121 and the second threaded part 122 through the screwing block 214. The slide rail 1101 can be a rod-shaped structure or a groove-shaped structure. In the illustrated embodiment, the slide rail 1101 is a rod-shaped structure, and the screwing block 214 is sleeved outside the slide rail 1101.

[0041] One end of the first connecting rod 211 is fixedly connected with the screw block 214 away from the side of the seat body 11, and the other end of the first connecting rod 211 is connected with the first locking piece 215. The first connecting rod 211 is arranged in the first clamping block 212 and the second clamping block 213. Specifically, the first clamping block 212 is provided with a first connecting hole 2122, and the second clamping block 213 is provided with a second connecting hole 2132. The first connecting rod 211 is arranged in the first connecting hole 2122 and the second connecting hole 2132 to achieve radial positioning of the first clamping block 212 and the second clamping block 213. The first clamping block 212 and the second clamping block 213 can slide relative to the first connecting rod 211 along the extension direction of the first connecting rod 211 to adjust the distance between the first clamping block 212 and the second clamping block 213.

[0042] The first clamping block 212 and the second clamping block 213 are oppositely arranged, the first clamping block 212 is close to the first locking piece 215, and the second clamping block 213 is close to the screw block 214. The first clamping block 212 and the second clamping block 213 are used to jointly clamp the Kirschner wire 90. The first clamping block 212 and the second clamping block 213 can also rotate relative to the first connecting rod 211 about the axis of the first connecting rod 211 to achieve angle adjustment of the Kirschner wire 90. Thus, there are multiple choices for the position of the Kirschner wire 90 for special patients with different anatomical shapes of the spinous process.

[0043] The first locking piece 215 can lock the position of the first clamping block 212 and the second clamping block 213, and can also release the locking of the first clamping block 212 and the second clamping block 213. For example, the first locking piece 215 can press the first clamping block 212 and the second clamping block 213 towards the screw block 214 by moving towards the screw block 214. In use, the operator can first place the Kirschner wire 90 between the first clamping block 212 and the second clamping block 213, and then press the first clamping block 212 and the second clamping block 213 towards the screw block 214 by operating the first locking piece 215 to limit the axial movement and rotation of the first clamping block 212 and the second clamping block 213. Thus, the first clamping block 212 and the second clamping block 213 can clamp the Kirschner wire 90, avoiding radial movement, axial movement and rotation of the Kirschner wire 90 relative to the fixing assembly 21, thereby ensuring the accuracy of the operation.

[0044] Optionally, please refer to Figure 2 and Figure 3The first locking member 215 can be screwed to the first connecting rod 211, and an operator can move the first locking member 215 towards or away from the screwing block 214 by screwing the first locking member 215. When the first locking member 215 moves towards the screwing block 214, the first clamping block 212 and the second clamping block 213 can be pressed towards the screwing block 214, thereby locking the first clamping block 212 and the second clamping block 213, so that the first clamping block 212 and the second clamping block 213 jointly clamp the trocar needle 90. When the first locking member 215 moves away from the screwing block 214, the locking of the first clamping block 212 and the second clamping block 213 can be released, so that the first clamping block 212 and the second clamping block 213 can be separated to put in or take out the trocar needle 90. The first locking member 215 can be a nut screwed to the first connecting rod 211, and the first locking member 215 can be provided with a first gasket 2151 on the side facing the seat body 11.

[0045] In some embodiments, referring to Figure 2 and Figure 3 , the fixing assembly 21 further comprises a first elastic member 216 located between the first clamping block 212 and the second clamping block 213 and capable of applying elastic forces away from the first clamping block 212 and the second clamping block 213. In this way, after the locking of the first clamping block 212 and the second clamping block 213 by the first locking member 215 is released, the first clamping block 212 can move towards the direction away from the second clamping block 213 under the elastic force of the first elastic member 216, so that a certain interval is maintained between the first clamping block 212 and the second clamping block 213, facilitating the putting in or taking out of the trocar needle 90.

[0046] Optionally, referring to Figure 2 and Figure 3 , the first elastic member 216 can be a spring sleeved on the first connecting rod 211, and the spring is located between the first clamping block 212 and the second clamping block 213. When the first clamping block 212 and the second clamping block 213 jointly clamp the trocar needle 90, the first elastic member 216 is in a compressed state. The first clamping surface 2101 can be provided with a first installation groove 2123, and the second clamping surface 2102 can be provided with a second installation groove 2192. The two ends of the spring are respectively accommodated in the first installation groove 2123 and the second installation groove 2192. The first installation groove 2123 and the second installation groove 2192 can be used to limit the spring and reduce the distance between the first clamping surface 2101 and the second clamping surface 2102.

[0047] In some embodiments, referring to Figure 2 and Figure 3The fixing assembly 21 further comprises a second connecting rod 218 and a second locking member 217. The threaded block 214 is connected to one end of the second connecting rod 218, and the second locking member 217 is connected to the other end of the second connecting rod 218. The second locking member 217 can abut against the seat body 11 to prevent the threaded block 214 from sliding relative to the seat body 11. It can be understood that the second locking member 217 can press the seat body 11 to increase the friction between the second locking member 217 and the seat body 11, thereby preventing the threaded block 214 from sliding relative to the seat body 11.

[0048] Optionally, referring to Figure 2 and Figure 3 The second connecting rod 218 has the same extension direction as the first connecting rod 211, and is connected to the side of the threaded block 214 away from the first connecting rod 211. The first connecting rod 211 and the second connecting rod 218 can be arranged in the threaded block 214, and are connected to each other to facilitate assembly.

[0049] Optionally, referring to Figure 2 and Figure 3 The second locking member 217 can be screwed on the second connecting rod 218. An operator can move the second locking member 217 towards or away from the seat body 11 by rotating the second locking member 217. When the second locking member 217 moves towards the seat body 11 to press the seat body 11, the position of the threaded block 214 can be locked. When the second locking member 217 moves away from the seat body 11, the position of the threaded block 214 can be unlocked, and the position of the threaded block 214 can be adjusted by rotating the adjusting screw 12. The second locking member 217 can be a nut screwed on the second connecting rod 218. The side of the second locking member 217 facing the seat body 11 can be provided with a second gasket 2171. In the illustrated embodiment, the seat body 11 is located on the side of the second locking member 217 facing the threaded block 214.

[0050] In some embodiments, referring to Figure 2 and Figure 3The first clamping groove 2121 is straightly extended, and both extension ends of the first clamping groove 2121 are throughly arranged. The second clamping groove 2131 is straightly extended, and both extension ends of the second clamping groove 2131 are throughly arranged. The first clamping groove 2121 and the second clamping groove 2131 are axially faced, the extension direction of the first clamping groove 2121 is same as the extension direction of the second clamping groove 2131, the slot opening of the first clamping groove 2121 is toward the slot opening of the second clamping groove 2131, and the Kirschner wire 90 is clamped between the first clamping groove 2121 and the second clamping groove 2131. In this way, the Kirschner wire 90 can be partially accommodated in the first clamping groove 2121 and partially accommodated in the second clamping groove 2131, and the distance between the first clamping face 2101 and the second clamping face 2102 is less than the diameter of the Kirschner wire 90, so that the Kirschner wire 90 is further prevented from moving radially and rotating by the first clamping groove 2121 and the second clamping groove 2131. Specifically, the side of the first clamping block 212 facing the second clamping block 213 has the first clamping face 2101, the side of the second clamping block 213 facing the first clamping block 212 has the second clamping face 2102, the first clamping face 2101 is parallel to the second clamping face 2102, the first clamping groove 2121 is located on the first clamping face 2101, and the second clamping groove 2131 is located on the second clamping face 2102.

[0051] For example, referring to Figure 3 The cross section of the first clamping groove 2121 perpendicular to the axial direction of the Kirschner wire 90 is arc-shaped, and the cross section of the second clamping groove 2131 perpendicular to the axial direction of the Kirschner wire 90 is also arc-shaped, that is, the first clamping groove 2121 and the second clamping groove 2131 are both formed by arc faces, so as to adapt to the cross section of the Kirschner wire 90.

[0052] Optionally, referring to Figure 2 The arc face radius corresponding to the first clamping groove 2121 is not equal to the arc face radius corresponding to the second clamping groove 2131, so that the first clamping groove 2121 and the second clamping groove 2131 can adapt to Kirschner wires 90 with different diameters (such as Figure 2). Wherein, the radius of the arc surface corresponding to the first clamping groove 2121 refers to the radius corresponding to the arc surface forming the first clamping groove 2121, and the radius of the arc surface corresponding to the second clamping groove 2131 refers to the radius corresponding to the arc surface forming the second clamping groove 2131. Taking the example that the radius of the arc surface corresponding to the first clamping groove 2121 is smaller than the radius of the arc surface corresponding to the second clamping groove 2131, the first clamping groove 2121 can be adapted to the Kirschner wire 90 with a smaller diameter, and the second clamping groove 2131 can be adapted to the Kirschner wire 90 with a larger diameter. In this way, no matter for the Kirschner wire 90 with a smaller diameter or for the Kirschner wire 90 with a larger diameter, one of the first clamping groove 2121 and the second clamping groove 2131 can be adapted to the Kirschner wire 90, so as to increase the contact area between the first clamping block 212 and the second clamping block 213 and the Kirschner wire 90, thereby further preventing the axial movement of the Kirschner wire 90.

[0053] In actual application, the diameter corresponding to the arc surface forming the first clamping groove 2121 and the diameter corresponding to the arc surface forming the second clamping groove 2131 can be respectively consistent with the diameters of two commonly used Kirschner wires 90 with different diameters. Of course, if the first clamping groove 2121 and the second clamping groove 2131 cannot be adapted to the Kirschner wire 90, for example, the diameter corresponding to the arc surface forming the first clamping groove 2121 is smaller than the diameter of the Kirschner wire 90, and the diameter corresponding to the arc surface forming the second clamping groove 2131 is larger than the diameter of the Kirschner wire 90, at this time, the two side walls of the slot opening of the first clamping groove 2121 can abut against the two sides of the Kirschner wire 90, and the slot bottom part of the second clamping groove 2131 can abut against the Kirschner wire 90, so that there are three positions to limit the Kirschner wire 90, so as to prevent the radial movement, axial movement and rotation of the Kirschner wire 90.

[0054] The first clamping groove 2121 and the second clamping groove 2131 can jointly form a clamping structure, and the first clamping block 212 and the second clamping block 213 can rotate around the axis of the first connecting rod 211. In the rotating process of the first clamping block 212 and the second clamping block 213, the clamping structure also rotates. The number of clamping structures in the fixing assembly 21 is not limited.

[0055] Optionally, the clamping structure is provided with one, if it is needed to set two Kirschner wires 90 closer, the clamping structures in the two fixing assemblies 21 can be rotated to positions close to each other, for example, the clamping structure in the left fixing assembly 21 is rotated to the right side of the first connecting rod 211, and the clamping structure in the right fixing assembly 21 is rotated to the left side of the first connecting rod 211. If it is needed to set two Kirschner wires 90 farther apart, the clamping structures in the two fixing assemblies 21 can be rotated to positions far away from each other, for example, the clamping structure in the left fixing assembly 21 is rotated to the left side of the first connecting rod 211, and the clamping structure in the right fixing assembly 21 is rotated to the right side of the first connecting rod 211.

[0056] Optionally, please refer to Figure 3 andFigure 2 The first clamping groove 2121 is provided with two, and the two first clamping grooves 2121 are respectively located on the opposite sides of the first connecting rod 211. The number of the second clamping grooves 2131 is the same as that of the first clamping grooves 2121, and each first clamping groove 2121 corresponds to a second clamping groove 2131 to form a clamping structure. Both clamping structures can clamp the Kirschner wire 90, so as to increase the number of Kirschner wires 90 that can be fixed by the fixing mechanism 100. The extension direction of the two first clamping grooves 2121 can be parallel. In the operation of using only two Kirschner wires 90, the Kirschner wire 90 can be clamped in which clamping structure according to the distance requirement between the two Kirschner wires 90. For example, if the two Kirschner wires 90 need to be arranged closer, one Kirschner wire 90 can be clamped on the right clamping structure of the left fixing assembly 21, and the other Kirschner wire 90 can be clamped on the left clamping structure of the right fixing assembly 21. If the two Kirschner wires 90 need to be arranged farther, one Kirschner wire 90 can be clamped on the left clamping structure of the left fixing assembly 21, and the other Kirschner wire 90 can be clamped on the right clamping structure of the right fixing assembly 21. In this way, the width of the fixing assembly 21 in the axial direction of the adjusting screw 12 can be reduced to limit the distance between the Kirschner wires 90, and the adjustment speed of the distance between the two Kirschner wires 90 can be improved.

[0057] Of course, the number of clamping structures can also be three or more to provide multiple Kirschner wire 90 mounting positions. The number of Kirschner wires 90 can be selected according to the position of the patient's spinous process and the curvature shape of the spine during the operation. The extension direction of the first clamping groove 2121 in each clamping structure can be the same or different, which is not limited in particular.

[0058] In other embodiments, only the first clamping groove 2121 can be provided on the first clamping block 212, and the second clamping groove 2131 is not provided on the second clamping block 213, or only the second clamping groove 2131 can be provided on the second clamping block 213, and the first clamping groove 2121 is not provided on the first clamping block 212, which is not limited here. The number of clamping structures in the two fixing assemblies 21 can also be different, and can be personalized according to the operation requirements, which is not limited here.

[0059] In some embodiments, the first clamping surface 2101 is a plane and does not provide the first clamping groove 2121, and the second clamping surface 2102 is a plane and does not provide the second clamping groove 2131. The Kirschner wire 90 is clamped between the first clamping surface 2101 and the second clamping surface 2102. Since the cross section of the Kirschner wire 90 is circular, the line connecting the contact positions of the first clamping surface 2101 and the Kirschner wire 90 and the contact positions of the second clamping surface 2102 and the Kirschner wire 90 passes through the center axis of the Kirschner wire 90, so as to prevent the Kirschner wire 90 from moving axially, radially and rotating.

[0060] In some embodiments, please refer toFigure 4 The fixing assembly 21 further comprises a third clamping block 219 fixedly connected to one side of the screwing block 214 facing the second clamping block 213. The two opposite surfaces of the third clamping block 219 and the second clamping block 213 are respectively provided with a first rotating part 2133 and a second rotating part 2191. The first rotating part 2133 and the second rotating part 2191 are rotationally connected, so that the third clamping block 219 and the second clamping block 213 rotate relative to each other around the axis of the first connecting rod 211. In this way, the second clamping block 213 is guided and limited by the third clamping block 219, avoiding the second clamping block 213 from being twisted when it rotates relative to the first connecting rod 211. Meanwhile, the third clamping block 219 can support the second clamping block 213 circumferentially, avoiding the second clamping block 213 from being skewed when only one Kirschner wire 90 is clamped between the first clamping block 212 and the second clamping block 213.

[0061] Specifically, please refer to Figure 5 and Figure 4 The second clamping block 213 has a first rotating surface 2130 opposite the second clamping surface 2102. The first rotating surface 2130 faces the third clamping block 219. The third clamping block 219 has a second rotating surface 2190 facing the second clamping block 213. The first rotating surface 2130 and the second rotating surface 2190 are opposite and parallel to each other. The first rotating part 2133 is formed on the first rotating surface 2130, and the second rotating part 2191 is formed on the second rotating surface 2190. When the first rotating part 2133 and the second rotating part 2191 rotate together, the second rotating surface 2190 is in close contact with the third rotating surface, so that the third clamping block 219 supports the second clamping block 213. In the following examples, the second rotating part 2191 is arranged on the second clamping block 213, and the second rotating part 2191 is arranged on the third clamping block 219.

[0062] One of the first rotating part 2133 and the second rotating part 2191 can be a protruding structure, and the other can be a groove structure matched with the protruding structure. When the second clamping block 213 rotates relative to the third clamping block 219, the protruding structure slides or rotates relative to the groove structure.

[0063] The width of the groove of the groove structure can be smaller than the width of the groove bottom. In this way, the protruding structure can be clamped in the groove structure in the axial direction, preventing the second clamping block 213 and the third clamping block 219 from being separated. After the first locking part 215 contacts and locks the first clamping block 212, only the first clamping block 212 can move away from the screwing block 214 under the action of the first elastic part 216. The second clamping block 213 is always in contact with the third clamping block 219, avoiding the second clamping block 213 from sliding relative to the first connecting rod 211, facilitating the placement and removal of the Kirschner wire 90.

[0064] In the following embodiments, the first rotating part 2133 is described as a protruding structure and the second rotating part 2191 is described as a grooved structure.

[0065] For example, please refer to Figure 5 and Figure 4 The first rotating part 2133 includes a protruding rib 2133a protruding from the first rotating surface 2130, which extends circumferentially along the first connecting rod 211. The second rotating part 2191 includes a strip-shaped groove 2191a formed on the second rotating surface 2190, which extends circumferentially along the second connecting rod 218. The protruding rib 2133a and the strip-shaped groove 2191a are adapted to and slidably connected. When the second clamping block 213 rotates relative to the third clamping block 219, the protruding rib 2133a slides within the strip-shaped groove 2191a. The strip-shaped groove 2191a can guide and limit the protruding rib 2133a, thereby limiting the rotation of the second clamping block 213.

[0066] Optional, please refer to Figure 5 and Figure 2 The first rotating part 2133 includes two protrusions 2133a, which extend along the axial direction of the first connecting rod 211. The two protrusions 2133a are respectively located on both sides of the first connecting rod 211 and are spaced apart. The second rotating part 2191 includes two strip-shaped grooves 2191a, which extend along the circumference of the first connecting rod 211. The two strip-shaped grooves 2191a are respectively located on both sides of the first connecting rod 211 and are spaced apart. Each protrusion 2133a is slidably connected to one strip-shaped groove 2191a. The two strip-shaped grooves 2191a can limit and guide both sides of the second clamping block 213, thereby improving the stability of the second clamping block 213 during rotation. The widths of the second clamping block 213 and the third clamping block 219 can be set to be equal to the width of the base body 11 to increase aesthetics and reduce space occupation. The two extended ends of the two strip grooves 2191a are connected. The protrusion 2133a can partially slide out of the strip grooves 2191a during the rotation of the second clamping block 213, but this does not affect the limiting effect of the strip grooves 2191a on the protrusion 2133a.

[0067] It should be noted that the diameters of the two arcs corresponding to the two protrusions 2133a can be equal, and in this case, the two protrusions 2133a can be spaced apart, as in the above embodiment, or the two protrusions 2133a can be connected end to end, and the two protrusions 2133a together form a ring-shaped protrusion 2133a. Correspondingly, the strip-shaped groove 2191a can also be two spaced apart grooves, or can also be connected end to end to form a ring-shaped groove. In this way, the protrusion 2133a can be prevented from being pulled out of the strip-shaped groove 2191a. Of course, the diameters of the two arcs corresponding to the two protrusions 2133a can also be different, and in this case, the two protrusions 2133a can overlap in the radial direction. In actual applications, the number, position and structure of the protrusions 2133a and the strip-shaped grooves 2191a can be set according to actual needs and design requirements.

[0068] For example, the first rotating part 2133 includes a boss protruding from the first rotating surface 2130, the top surface of the boss parallel to the first rotating surface 2130 is circular, and the central axis of the boss coincides with the central axis of the first connecting rod 211. The second rotating part 2191 includes a columnar groove provided in the second rotating surface 2190, the central axis of the columnar groove coincides with the central axis of the first connecting rod 211, and the columnar groove is adapted to and rotationally connected with the boss. Compared with the sliding connection between the protrusion 2133a and the strip-shaped groove 2191a, the rotational connection structure of the boss and the columnar groove in this embodiment has higher structural strength.

[0069] It should be noted that in other embodiments, the first rotating part 2133 can also be a groove-shaped structure, and the second rotating part 2191 can be a protrusion-shaped structure, which is not limited here.

[0070] In some embodiments, please refer to Figure 5 and Figure 2 The seat body 11 is marked with a scale 111 in the direction of the sliding rail 1101, and the fixing assembly 21 is provided with an identifier 2193 for indicating the scale 111. After the Kirschner wire 90 is connected to the fixing assembly 21, the doctor can adjust the adjusting screw 12 according to the expected planned installation position of the spinous process, until the distance between the two fixing assemblies 21 calculated according to the scale 111 indicated by the identifiers 2193 on the two fixing assemblies 21 is equal to the preset distance. At this time, the two Kirschner wires 90 reach the installation position of the spinous process, and the doctor can connect the spinous process and the spine. It should be noted that the identifier 2193 can be a specially marked identifier 2193, or it can be a certain structure or position on the fixing assembly 21, which is not limited here.

[0071] In some embodiments, please refer to Figure 6 The fixing seat 10 further includes a seat rod 13 connected to the seat body 11, and the connector 300 is connected to the seat body 11 through the seat rod 13. The seat rod 13 can be provided at the end of the seat body 11 to avoid affecting the movement of the fixing assembly 21.

[0072] In some embodiments, referring to Figure 6 , the connector 300 comprises a limiting rod 31, a first limiting head 32, a second limiting head 33, a clamping head assembly 34 and a support 35.

[0073] The first limiting head 32 and the second limiting head 33 are respectively connected to the two ends of the limiting rod 31, and the clamping head assembly 34 and the support 35 are sleeved on the limiting rod 31, wherein the clamping head assembly 34 is used for clamping the fixed seat 10, specifically clamping the seat rod 13 of the fixed seat 10. The support 35 is used for connecting the tracer body 200. The edge of the first limiting head 32 protrudes from the peripheral side surface of the limiting rod 31, and the edge of the second limiting head 33 also protrudes from the peripheral side surface of the limiting rod 31. The first limiting head 32 and the second limiting head 33 can move towards each other or move away from each other. When the first limiting head 32 and the second limiting head 33 move towards each other, the first limiting head 32 and the second limiting head 33 can jointly clamp the clamping assembly and the support 35, so that the first clamping head 341 and the second clamping head 342 jointly clamp the seat rod 13 and fix the angle of the support 35. When the first limiting head 32 and the second limiting head 33 move away from each other, the clamping of the clamping assembly and the support 35 is relaxed, the support 35 can rotate around the limiting rod 31 to adjust the position of the tracer body 200, and the clamping of the seat rod 13 by the clamping assembly is also relaxed, so that the seat rod 13 can be taken out or adjusted.

[0074] Optionally, referring to Figure 6 , the first limiting head 32 is fixedly connected with the limiting rod 31, and the second limiting head 33 is threadedly connected with the limiting rod 31. When it is necessary to adjust the distance between the first limiting head 32 and the second limiting head 33, the first limiting head 32 or the second limiting head 33 can be rotated to realize the movement of the first limiting head 32 and the second limiting head 33 towards each other or away from each other.

[0075] Optionally, referring to Figure 1 , the clamping head assembly 34 comprises a first clamping head 341, a second clamping head 342 and a second elastic member 343. The first clamping head 341 and the second clamping head 342 are sleeved on the limiting rod 31 and are rotationally connected through a pin structure 3401. The rotation axis of the first clamping head 341 and the second clamping head 342 is perpendicular to the central axis of the limiting cover. The first clamping head 341 can be provided with a first clamping groove, and the second clamping head 342 can be provided with a second clamping groove. The grooves of the first clamping groove and the second clamping groove are opposite to each other to jointly clamp the seat rod 13 (such as Figure 6). The first clamping groove and the second clamping groove are located between the limiting cover and the pin structure 3401. The second elastic member 343 is arranged between the first clamping head 341 and the second clamping head 342, and is used to apply an elastic force to the first clamping head 341 and the second clamping head 342 to make them move away from each other. In this way, after the first limiting head 32 and the second limiting head 33 move away from each other, the first clamping head 341 and the second clamping head 342 can be automatically opened under the elastic force of the second elastic member 343, so as to facilitate the quick insertion or quick removal of the seat rod 13, and realize the quick disassembly and assembly between the connector 300 and the fixing mechanism 100, thereby saving the operation time. The second elastic member 343 can be a spring sleeved on the limiting rod 31, and when the first clamping head 341 and the second clamping head 342 clamp the seat rod 13, the spring is in a compressed state.

[0076] Optionally, please refer to Figure 1 , the support member 35 is located between the second limiting head 33 and the clamping head assembly 34, and the support member 35 and the clamping head assembly 34 are engaged through the tooth structure 351. Specifically, the support member 35 is located between the second clamping head 342 and the second limiting head 33, the support member 35 is provided with a first annular gear rack 3511, the second clamping head 342 is provided with a second annular gear rack 3512, the central axis of the first annular gear rack 3511, the central axis of the second annular gear rack 3512 and the support axis of the limiting rod 31 all coincide, the first annular gear rack 3511 and the second annular gear rack 3512 are engaged, and the first annular gear rack 3511 and the second annular gear rack 3512 form the tooth structure 351. The support member 35 can adjust the angle between the clamping head assembly 34 and the position of the tracer body 200 (such as Figure 1 ) when the first limiting head 32 and the second limiting head 33 move away from each other, and lock the current position through the tooth structure 351 when the first limiting head 32 and the second limiting head 33 move close to each other.

[0077] In other embodiments, the fixing mechanism 100 can also be directly connected with the tracer body 200, which is not limited here.

[0078] Please refer to Figure 7 , the tracer body 200 is connected with the connector 300 through the support member 35. Please refer to ​The tracer body 200 comprises a support 41, a cylindrical plug 44, a reflective ball 43, an array connector 42 and a pin 45. The support 41 is provided with a plurality of branches, each of which is connected with the array connector 42 at the extending end. The cylindrical plug 44 is connected with the array connector 42 and limits the reflective ball 43 between the array connector 42 and the cylindrical plug 44 to fix the reflective ball 43. The pin 45 is connected with the array connector 42 or the cylindrical plug 44 and is connected with the support 35. In this way, the tracer body 200 is connected with the support 35 through the pin 45. In the illustrated embodiment, the cylindrical plug 44 is threadedly connected with the array connector 42. The cylindrical plug 44, the reflective ball 43 and the array connector 42 are all provided with four.

[0079] During installation, the reflective ball 43 is first arranged in the inner hole 421 of the array connector 42 to preliminarily position the reflective ball 43. Then, the cylindrical plug 44 is screwed on the array connector 42 to lock the reflective ball 43 between the cylindrical plug 44 and the array connector 42. Then, the pin 45 is inserted into the opening of the cylindrical plug 44 and is gently knocked towards the reflective ball 43 until the pin 45 is inserted into the cylindrical plug 44.

[0080] During surgery, the Kirschner wire 90 is first fixed on the patient's spinous process through the fixing mechanism 100. Then, the position and state of the tracer body 200 are adjusted in real time according to the optical tracking system to ensure that the optical tracking system can track and identify the position of the reflective ball 43 in real time to realize real-time tracking and positioning of the patient's pose during surgery.

[0081] The above only describes some specific embodiments of the present application and only specifically describes the technical principles of the present application. These descriptions are only for explaining the principles of the present application and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, any modifications, equivalent replacements and improvements made within the spirit and principles of the present application and other specific embodiments of the present application that can be conceived by those skilled in the art without creative labor should be included in the protection scope of the present application.

Claims

1. A fixation mechanism (100) for a tracer device, characterized in that, The utility model relates to a fixing device for kirschner wire, which comprises a fixing base (10) and a fixing device (20). The fixing base (10) comprises a base body (11) and an adjusting screw (12) rotatably connected to the base body (11), wherein the base body (11) is provided with a sliding rail (1101) extending in the same direction as the adjusting screw (12), and the adjusting screw (12) is provided with a first threaded part (121) and a second threaded part (122) with opposite screw threads. The fixing device (20) comprises two fixing assemblies (21), each of which is slidably connected to the sliding rail (1101), and the two fixing assemblies (21) are respectively screwed to the first threaded part (121) and the second threaded part (122), and the fixing assemblies (21) are used for detachably connecting kirschner wires (90).

2. The fixation mechanism (100) for a tracer device of claim 1, characterized in that The fixing assembly (21) comprises a first connecting rod (211), a first clamping block (212), a second clamping block (213), a screwing block (214), and a first locking piece (215), wherein the screwing block (214) is slidably connected to the sliding rail (1101), the screwing blocks (214) of the two fixing assemblies (21) are respectively screwed to the first threaded part (121) and the second threaded part (122), one side of the screwing block (214) away from the base body (11) is fixedly connected to the first connecting rod (211), the first connecting rod (211) penetrates through the second clamping block (213) and the first clamping block (212), and the other end of the first connecting rod (211) is connected to the first locking piece (215), and the second clamping block (213) is oppositely arranged to the first clamping block (212) and is used for jointly clamping kirschner wires (90).

3. The fixation mechanism (100) for a tracer device of claim 2, characterized in that, The fixing assembly (21) further comprises a first elastic piece (216) located between the first clamping block (212) and the second clamping block (213), and the first elastic piece (216) provides an elastic force for moving the first clamping block (212) away from the second clamping block (213).

4. The fixation mechanism (100) for a tracer device of claim 2, wherein, The fixing assembly (21) further comprises a second connecting rod (218) and a second locking piece (217), wherein the screwing block (214) is connected to one end of the second connecting rod (218), and the second locking piece (217) is connected to the other end of the second connecting rod (218), and the second locking piece (217) abuts against the base body (11) to prevent the screwing block (214) from sliding relative to the base body (11).

5. The fixation mechanism (100) for a tracer device of claim 2, wherein, At least one first clamping groove (2121) is formed on one side of the first clamping block (212) facing the second clamping block (213), and / or at least one second clamping groove (2131) is formed on one side of the second clamping block (213) facing the first clamping block (212).

6. The fixation mechanism (100) for a tracer device of claim 5, characterized in that The first clamping block (212) is provided with two first clamping grooves (2121) with arc-shaped cross sections, the second clamping block (213) is provided with two second clamping grooves (2131) with arc-shaped cross sections, the first clamping grooves (2121) and the second clamping grooves (2131) are oppositely arranged, and the arc surface radius corresponding to the first clamping grooves (2121) is not equal to the arc surface radius corresponding to the second clamping grooves (2131).

7. The fixation mechanism (100) for a tracer device of claim 2, wherein, The fixing assembly (21) further comprises a third clamping block (219) fixedly connected to one side of the screwing block (214) facing the second clamping block (213), the third clamping block (219) and the second clamping block (213) are respectively provided with a first rotating part (2133) and a second rotating part (2191) on the opposite faces thereof, and the first rotating part (2133) and the second rotating part (2191) are rotationally connected, so that the third clamping block (219) and the second clamping block (213) are relatively rotated in the axial direction of the first connecting rod (211).

8. A fixation mechanism (100) for a tracer device according to any one of claims 1 to 7, characterized in that The seat body (11) is provided with a scale (111) along the direction of the slide rail (1101), and the fixing assembly (21) is provided with an identification (2193) for indicating the scale.

9. A tracer device, characterized in that The tracer body (200) is connected to the seat body (11).

10. The tracer device of claim 9, wherein, The tracer body (200) is connected to the fixing seat (10) through a connector (300), the connector (300) comprises a limiting rod (31), a first limiting head (32), a second limiting head (33), a chuck assembly (34) and a support (35) which are all connected to the limiting rod (31), the first limiting head (32) and the second limiting head (33) are respectively connected to two ends of the limiting rod (31) and can move towards or away from each other, the chuck assembly (34) and the support (35) are both located between the first limiting head (32) and the second limiting head (33), the chuck assembly (34) is used for clamping the fixing seat (10), and the support (35) is connected to the tracer body (200).

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