Stackable quick-detachable device and surgical navigation system

Abstract

A stackable quick-detachable device and a surgical navigation system. The stackable quick-detachable device is used for connecting two adjacent cascading pipe sections (8) of a surgical navigation system. The stackable quick-detachable device comprises: a connecting rod (1), a butt joint rod (2) and an elastic member (3). The connecting rod (1) is arranged at one end of one cascading pipe section (8), and the butt joint rod (2) is arranged at one end of the other cascading pipe section (8). An end face of the connecting rod (1) is provided with a mounting slot (4), and the elastic member (3) is used for being mounted onto the inner wall of the mounting slot (4). The butt joint rod (2) is used for being inserted into the mounting slot (4) of the connecting rod (1) and abutting against the elastic member (3). The structure is simple and facilitates quickly detaching and mounting cascading pipe sections.

Description

A superimposable quick-release device and surgical navigation system Technical Field The present invention relates to the technical field of medical devices, and in particular to a stackable quick-release device and a surgical navigation system. Background Art In the field of oral surgery, special instruments are usually inserted into the patient's mouth for operation. Due to the small oral space and limited field of vision, it is often impossible to accurately know the specific position of the instrument, which increases the risk of surgery and worsens the postoperative effect. With the popularization of navigation technology and digital oral surgery technology, the accuracy of oral surgery for treatment points is getting higher and higher, and various types of positioning instruments have emerged. Technical issues At present, optical tracking is commonly used. The three-dimensional position of the patient's oral cavity and the instrument itself is obtained through infrared light emitting devices and receiving devices to guide the operation. This technical solution has high accuracy, but this device is limited by tissue occlusion and has limitations when used in deep cavities; other solutions use electromagnetic tracking to locate through magnetic fields. This method can penetrate non-magnetic objects to achieve positioning, avoiding the defects of optical tracking, but the accuracy is not high and is limited when high precision is required. The above scheme requires the use of more precise light, magnetic field emitting devices and receiving devices, with high hardware costs, and in the narrow oral space, it is either easily blocked, resulting in navigation failure, or the accuracy cannot meet the requirements of oral surgery. In addition, there is a mechanical navigation device. The connection structure of the cascade tube of the mechanical navigation device is relatively complex. When adjusting the length, the disassembly and assembly operation is relatively troublesome, resulting in low work efficiency. . Technical Solutions The present invention aims to solve the problem that the connection structure of the existing cascade tubes used for distance measurement, level measurement and orientation determination during surgery is relatively complicated and the disassembly and assembly operation is relatively troublesome. In order to solve the above problems, the present invention proposes the following technical solutions: A stackable quick-release device is used to connect two adjacent cascade tubes of a surgical navigation system, the stackable quick-release device comprising: a connecting rod, a docking rod and an elastic member, the connecting rod is arranged at one end of one of the cascade tubes, and the docking rod is arranged at one end of the other cascade tube; the end surface of the connecting rod is provided with a mounting groove, the elastic member is used to be mounted on the inner wall of the mounting groove, the docking rod on one of the cascade tubes is used to be inserted into the mounting groove of the connecting rod on the other cascade tube and abut against the elastic member; The outer wall of the docking rod is provided with a connecting pin; the inner wall of the installation groove is provided with a connecting groove matching the connecting pin, and the connecting groove includes a first groove, a second groove and a third groove, the first groove is arranged along the axial direction of the connecting rod and the opening of the first groove is arranged toward the inlet and outlet of the installation groove; the end of the first groove away from the opening is connected to the second groove perpendicular to the first groove, the end of the second groove away from the first groove is connected to the third groove, and the third groove is arranged in the same direction as the first groove; The docking rod is used to be inserted into the installation groove and rotated so that the connecting pin moves into the first groove and moves from the first groove to the second groove; the elastic member is used to abut the docking rod so that the connecting pin on the outer wall of the docking rod is clamped in the third groove. Beneficial Effects Compared with the prior art, the stackable quick-release device provided by the present invention has but is not limited to the following beneficial effects: When the cascade tubes in the surgical navigation system are shorter, the number of cascade tubes can be increased and two adjacent cascade tubes can be connected through a stackable quick-release device; during installation, first insert the docking rod on one of the cascade tubes into the installation groove of the connecting rod on the other cascade tube, and when inserting, pay attention to inserting the connecting pin into the first groove of the connecting groove, and move the connecting pin to the first groove where it is connected to the second groove, while making the end of the docking rod squeeze the elastic member and abut the elastic member; then, rotate the docking rod, and the docking rod drives the connecting pin to rotate, so that the connecting pin moves from the first groove to the second groove where it is connected to the third groove; finally, let go to remove the external force on the docking rod, and the elastic member is reset so that the elastic member pushes the docking rod. The connecting pin on the docking rod moves from the second groove to the third groove, and the elastic member abuts against the docking rod so that the connecting pin is clamped in the third groove, thereby realizing the fixed connection between the docking rod and the connecting rod; wherein, the docking rod is inserted into the installation groove and rotated so that the connecting pin moves into the first groove and moves from the first groove to the second groove; the elastic member is used to abut the docking rod so that the connecting pin on the outer wall of the docking rod is clamped in the third groove. The structure is simple and easy to operate, which is conducive to the rapid disassembly and assembly of the cascade tube, so that the user can adjust the length of the cascade tube in the surgical navigation system according to actual conditions. The setting of the elastic member is conducive to reducing the gap at the connection between two adjacent cascade tubes when connected, thereby increasing the stability of the connection, improving the connection accuracy and reducing the error. Preferably, a guiding slope is arranged in the second groove, and the guiding slope is gradually inclined toward an end away from the opening along a direction from the first groove to the third groove. Preferably, a spring groove connected to the mounting groove is provided inside the connecting rod and on the inner wall of the mounting groove; the elastic member includes a connecting spring, the connecting spring is installed in the spring groove, one end of the connecting spring is connected to the inner wall of the spring groove, and the other end of the connecting spring is used to connect to the docking rod. Preferably, the elastic member also includes a connecting plate, which is used to move in the installation groove, one end of the spring groove is connected to the inner wall of the spring groove, and the other end of the connecting spring is connected to the connecting plate; a groove is provided in the middle of one side of the connecting plate away from the connecting spring, and the docking rod is used to abut against the groove. Preferably, the mounting groove comprises an inner groove, a middle groove and a limiting groove which are sequentially connected and arranged from the inside to the outside, and the inner groove, the middle groove and the limiting groove are coaxially arranged with the connecting rod; the diameter of the inner groove is larger than the diameter of the middle groove, and the diameter of the limiting groove is larger than the diameter of the middle groove; the connecting plate is used to move in the inner groove; the connecting groove is arranged on the inner wall of the middle groove, and the connection between the limiting groove and the middle groove has a first step surface, and the opening of the first groove is arranged toward the first step surface; The docking rod includes a first rod and a second rod, the first rod is used to connect with one end of the cascade tube, the diameter of the first rod matches the limiting groove, the second rod is used to be arranged at the end of the first rod away from the cascade tube, the diameter of the second rod matches the middle groove, the connection between the first rod and the second rod has a second step surface, the second step surface matches the first step surface, and the connecting pin is arranged on the outer wall of the second rod. Preferably, a plurality of connecting pins are evenly arranged along the circumferential direction of the docking rod, and the connecting pins are arranged in two rows along the axial direction of the docking rod, and the two rows of connecting pins are staggered and distributed at intervals; a plurality of connecting grooves are evenly arranged on the inner wall of the middle groove, and the projection of the connecting pins in the axial direction of the docking rod matches the projection of the connecting grooves in the axial direction of the connecting rod. Preferably, the stackable quick-release device also includes a fixing tube, a fixing plate, a fixing bolt and a fixing nut, the fixing tube is fixedly arranged on an end of the connecting rod away from the mounting groove, and one end of the cascade tube is used to be inserted into the fixing tube; a fixing groove is penetrated through the side wall of the fixing tube, and the fixing plates are arranged on both sides of the fixing groove on the side wall of the fixing tube, and the two fixing plates are used to achieve connection through the fixing bolts and the fixing nuts.

[0013] The present invention also provides a surgical navigation system, comprising a cascade tube and a stackable quick-release device as described above, wherein the cascade tube comprises a first bend and a second bend, wherein the first bend and the second bend are both "L" shaped structures, the connecting rod of the stackable quick-release device is used to connect to one end of the first bend, and the docking rod of the stackable quick-release device is used to connect to one end of the second bend. Preferably, the surgical navigation system further comprises a rotation structure, and an end of the first curved tube away from the connecting rod and an end of the second curved tube away from the docking rod are connected via the rotation structure so that the first curved tube and the second curved tube rotate relative to each other. Preferably, the rotating structure comprises a connecting head, a rotating bearing, a limiting portion and a connecting cover, the rotating bearing is sleeved on one end of the first curved pipe away from the connecting rod, and the limiting portion is installed on the end of the first curved pipe located outside the rotating bearing; The end of the second curved pipe away from the docking rod is fixedly connected to the connecting head, and the end of the connecting head is provided with a connecting groove matching the first curved pipe, the rotating bearing and the limiting portion. The end of the first curved pipe away from the connecting rod is together with the rotating bearing and the limiting portion for installation in the connecting groove; the connecting cover is used to be fixed to the connecting head toward the connecting groove by screws and limit the rotating bearing and the limiting portion in the connecting groove. A surgical navigation system provided by the present invention has but is not limited to the following beneficial effects compared to the prior art: the rotating bearing and the connecting groove cooperate with each other to rotationally connect the first bend pipe and the second bend pipe, so that the first bend pipe and the second bend pipe of a cascade pipe can rotate relative to each other, thereby increasing the flexibility of the cascade pipe when in use, so that the cascade pipe can be rotated according to actual needs, thereby ensuring the accuracy of the navigation position. BRIEF DESCRIPTION OF THE DRAWINGS FIG1 is a schematic diagram of the connection relationship between the connecting rod and the docking rod in the present invention; FIG2 is a schematic structural diagram of a connecting pin according to an embodiment of the present invention; FIG3 is a schematic diagram of the exploded structure of the rotating structure of an embodiment of the present invention; FIG4 is a schematic cross-sectional view of a rotating structure according to an embodiment of the present invention; FIG. 5 is a schematic diagram of the structure of the cascade tube according to an embodiment of the present invention. Description of reference numerals: 1 connecting rod, 11 fixing cylinder, 12 fixing plate, 13 fixing bolt, 2 docking rod, 21 first rod, 22 second rod, 23 second step surface, 3 elastic member, 31 connecting spring, 32 connecting plate, 33 groove, 4 mounting groove, 40 spring groove, 41 inner groove, 42 middle groove, 43 limiting groove, 44 first step surface, 5 connecting pin, 6 connecting groove, 61 first groove, 610 opening, 62 second groove, 63 third groove, 64 guiding inclined surface, 7 rotating structure, 71 connecting head, 72 rotating bearing, 73 limiting part, 74 connecting cover, 75 connecting through groove, 8 cascade pipe, 81 first elbow, 82 second elbow. Embodiments of the present invention The following is a further detailed description of the implementation of the present application in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but cannot be used to limit the scope of the present application. In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. It should be noted that, in the coordinate system XYZ provided herein, the positive direction of the X-axis represents the right, the reverse direction of the X-axis represents the left, the positive direction of the Y-axis represents the front, the reverse direction of the Y-axis represents the back, the positive direction of the Z-axis represents the top, and the reverse direction of the Z-axis represents the bottom; the meanings of the Z-axis, X-axis, and Y-axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. Referring to FIGS. 1 to 5 , the present invention provides a stackable quick-release device for connecting two adjacent cascade tubes 8 of a surgical navigation system, the stackable quick-release device comprising: a connecting rod 1, a docking rod 2 and an elastic member 3, the connecting rod 1 being arranged at one end of one of the cascade tubes 8, the docking rod 2 being arranged at one end of the other cascade tube 8; the end surface of the connecting rod 1 being provided with a mounting groove 4, the elastic member 3 being used for mounting on the inner wall of the mounting groove 4, the docking rod 2 on one of the cascade tubes 8 being used for plugging into the mounting groove 4 of the connecting rod 1 on the other cascade tube 8 and abutting against the elastic member 3 (the arrow in FIG. 1 indicates that the docking rod 2 is used for plugging into the mounting groove 4 of the connecting rod 1 along the direction of the arrow); Referring to FIGS. 1 and 2 , a connecting pin 5 is disposed on the outer wall of the docking rod 2; a connecting groove 6 matching the connecting pin 5 is disposed on the inner wall of the mounting groove 4, and the connecting groove 6 includes a first groove 61, a second groove 62 and a third groove 63, wherein the first groove 61 is disposed along the axial direction of the connecting rod 1 and an opening 610 of the first groove 61 is disposed toward the inlet and outlet of the mounting groove 4; an end of the first groove 61 away from the opening 610 is connected to the second groove 62 perpendicular to the first groove 61, an end of the second groove 62 away from the first groove 61 is connected to the third groove 63, and the third groove 63 is disposed in the same direction as the first groove 61; The docking rod 2 is used to be inserted into the installation groove 4 and rotated so that the connecting pin 5 moves into the first groove 61 and moves from the first groove 61 to the second groove 62; the elastic member 3 is used to abut the docking rod 2 so that the connecting pin 5 on the outer wall of the docking rod 2 is clamped in the third groove 63. In this embodiment, when the cascade tubes 8 in the surgical navigation system are shorter, the number of the cascade tubes 8 can be increased and the two adjacent cascade tubes 8 can be connected through the stackable quick-release device; during installation, first, the docking rod 2 on one cascade tube 8 is inserted into the installation groove 4 of the connecting rod 1 on the other cascade tube 8, and when inserting, pay attention to inserting the connecting pin 5 into the first groove 61 of the connecting groove 6, and move the connecting pin 5 to the first groove 61 and the second groove 62. At the same time, the end of the docking rod 2 squeezes the elastic member 3 and abuts against the elastic member 3; then, rotate the docking rod 2, and the docking rod 2 drives the connecting pin 5 to rotate, so that the connecting pin 5 moves from the first groove 61 to the second groove 62 and the third groove 63. Finally, let go to remove the external force on the docking rod 2, and the elastic member 3 is reset, so that the elastic member 3 pushes The docking rod 2, the connecting pin 5 on the docking rod 2 moves from the second groove 62 to the third groove 63, the elastic member 3 abuts against the docking rod 2 so that the connecting pin 5 is clamped in the third groove 63, thereby realizing the fixed connection between the docking rod 2 and the connecting rod 1; wherein, by inserting the docking rod 2 into the installation groove 4 and rotating it, the connecting pin 5 is moved into the first groove 61 and from the first groove 61 to the second groove 62; the elastic member 3 is used to abut the docking rod 2 so that the connecting pin 5 on the outer wall of the docking rod 2 is clamped in the third groove 63. The structure is simple and easy to operate, which is conducive to the rapid disassembly and assembly of the cascade tube 8, so that the user can adjust the length of the cascade tube 8 in the surgical navigation system according to actual conditions. The setting of the elastic member 3 is conducive to reducing the gap at the connection between two adjacent cascade tubes 8 when connected, thereby increasing the stability of the connection, improving the connection accuracy, and reducing the error. Referring to FIG. 1 , preferably, a guiding inclined surface 64 is disposed in the second groove 62 , and the guiding inclined surface 64 is gradually inclined toward an end away from the opening 610 along a direction from the first groove 61 to the third groove 63 . Specifically, the guiding inclined surface 64 can be a straight surface or a curved surface. In this embodiment, when the connecting pin 5 rotates with the docking rod 2, the connecting pin 5 moves from the connection between the first groove 61 and the second groove 62 along the second groove 62 to the connection between the second groove 62 and the third groove 63; when the connecting pin 5 moves in the second groove 62, it moves along the guide bevel 64. The setting of the guide bevel 64 can make the connecting pin 5 move more smoothly in the second groove 62, avoiding the phenomenon of jamming when the connecting pin 5 moves in the second groove 62, thereby making disassembly and assembly convenient and helping to improve the efficiency of disassembly and assembly. Referring to Figure 2, preferably, the cross-section of the connecting pin 5 is an isosceles trapezoidal structure, the width of the first groove 61 is greater than the longer bottom side of the isosceles trapezoidal structure of the connecting pin 5, the width of the second groove 62 is greater than the height of the isosceles trapezoidal structure of the connecting pin 5, and the shape of the third groove 63 matches the cross-section of the connecting pin 5, which is also an isosceles trapezoidal structure; when the connecting pin 5 is arranged on the docking rod 2, the longer bottom side of the isosceles trapezoidal structure of the connecting pin 5 is close to the end of the docking rod 2, and the shorter bottom side of the isosceles trapezoidal structure of the connecting pin 5 is away from the end of the docking rod 2; then the shorter bottom side of the isosceles trapezoidal structure of the third groove 63 is close to the opening 610, and the longer bottom side of the isosceles trapezoidal structure of the third groove 63 is away from the opening 610 and connected to the second groove 62. In this embodiment, the cross-section of the connecting pin 5 is an isosceles trapezoidal structure, and the structures of the first groove 61, the second groove 62 and the third groove 63 match the connecting pin 5. The width of the first groove 61 is greater than the longer bottom side of the isosceles trapezoidal structure of the connecting pin 5, and the width of the second groove 62 is greater than the height of the isosceles trapezoidal structure of the connecting pin 5, which is conducive to the connecting pin 5 moving smoothly in the first groove 61 and the second groove 62; the shape of the third groove 63 matches the cross-section of the connecting pin 5. When the connecting pin 5 is snapped into the third groove 63, the setting of the isosceles trapezoidal structure is conducive to making the connecting pin 5 more stable in the third groove 63, without any gap, avoiding the problem of shaking, and is conducive to improving the stability of the connection, thereby strengthening the connection. In other embodiments, the cross-sectional shape of the connecting pin 5 can also be a triangle, a rectangle, a polygon, a circle or various combinations thereof, and the cross-sectional shape of the third groove 63 matches the cross-sectional shape of the connecting pin 5, so that no gap will appear when the connecting pin 5 is snapped into the third groove 63, thereby improving the connection stability. Referring to Figure 1, preferably, a spring groove 40 connected to the mounting groove 4 is provided inside the connecting rod 1 on the inner wall of the mounting groove 4; the elastic member 3 includes a connecting spring 31, the connecting spring 31 is installed in the spring groove 40, one end of the connecting spring 31 is connected to the inner wall of the spring groove 40, and the other end of the connecting spring 31 is used to connect with the docking rod 2. Specifically, the diameter of the spring groove 40 is smaller than the diameter of the mounting groove 4 and smaller than the diameter of the docking rod 2. When the docking rod 2 is inserted into the mounting groove 4, the end of the docking rod 2 is used to squeeze the connecting spring 31. The inner wall of the mounting groove 4 connected to the spring groove 40 has a limiting effect on the docking rod 2, so that the docking rod 2 can be quickly moved to the connection between the first groove 61 and the second groove 62, thereby improving the installation convenience. In this embodiment, when the docking rod 2 is inserted into the installation groove 4, the end of the docking rod 2 is used to squeeze the connecting spring 31 until the docking rod 2 is restricted by the inner wall of the installation groove 4 and the spring groove 40, and the docking rod 2 is restricted by the axial displacement. At this time, the connecting pin 5 is connected to the second groove 62 in the first groove 61, and then the docking rod 2 is rotated to move the connecting pin 5 from the first groove 61 to the second groove 62, and then the hand is released to remove the external force on the docking rod 2. Under the effect of the resetting of the connecting spring 31, the connecting spring 31 pushes the docking rod 2, and the connecting pin 5 on the docking rod 2 moves from the second groove 62 to the third groove 63; wherein, the connecting spring 31 abuts against the docking rod 2, so that the connecting pin 5 is more firmly connected to the third groove 63, avoiding the problem of unstable connection caused by gap, increasing the connection stability and also increasing the convenience of installation. Referring to Figure 1, preferably, the elastic member 3 also includes a connecting plate 32, and the connecting plate 32 is used to move in the installation groove 4, one end of the spring groove 40 is connected to the inner wall of the spring groove 40, and the other end of the connecting spring 31 is connected to the connecting plate 32; a groove 33 is provided in the middle of the side of the connecting plate 32 away from the connecting spring 31, and the docking rod 2 is used to abut against the groove 33. In this embodiment, when the docking rod 2 is inserted into the installation groove 4, the end of the docking rod 2 abuts against the groove 33, and the connecting plate 32 is pushed to squeeze the connecting spring 31 until the connecting plate 32 abuts against the inner wall connecting the installation groove 4 and the spring groove 40, so that the docking rod 2 is restricted by the inner wall connecting the installation groove 4 and the spring groove 40 to stop axial displacement. At this time, the connecting pin 5 is connected to the second groove 62 in the first groove 61, and then the docking rod 2 is rotated to move the connecting pin 5 from the first groove 61 to the second groove 62; wherein, the setting of the connecting plate 32 is conducive to making the docking rod 2 in the groove 33 when squeezing the connecting spring 31, so that the docking rod 2 is in a suitable position when moving, avoiding the problem of position displacement. In other embodiments, the elastic member 3 may also be a spring or other structure or material with elastic deformation capability. Referring to Fig. 1, preferably, the mounting groove 4 comprises an inner groove 41, a middle groove 42 and a limiting groove 43 which are sequentially connected and arranged from the inside to the outside, and the inner groove 41, the middle groove 42 and the limiting groove 43 are coaxially arranged with the connecting rod 1; the diameter of the inner groove 41 is larger than the diameter of the middle groove 42 and larger than the diameter of the spring groove 40, and the diameter of the limiting groove 43 is larger than the diameter of the middle groove 42; the connecting plate 32 is used to move in the inner groove 41; the connecting groove 6 is arranged on the inner wall of the middle groove 42, and the connection between the limiting groove 43 and the middle groove 42 has a first step surface 44, and the first groove 61 has a first step surface 45; The opening 610 is arranged toward the first step surface 44; the docking rod 2 includes a first rod 21 and a second rod 22, the first rod 21 is used to connect with one end of the cascade tube 8, the diameter of the first rod 21 matches the limiting groove 43, the second rod 22 is used to be arranged at the end of the first rod 21 away from the cascade tube 8, the diameter of the second rod 22 matches the middle groove 42, the connection between the first rod 21 and the second rod 22 has a second step surface 23, the second step surface 23 matches the first step surface 44, and the connecting pin 5 is arranged on the outer wall of the second rod 22. Specifically, the connecting plate 32 moves in the inner groove 41 , and the diameter of the connecting plate 32 is larger than the diameter of the spring groove 40 , smaller than the diameter of the inner groove 41 , and larger than the diameter of the middle groove 42 . In this embodiment, during installation, the second rod 22 of the docking rod 2 is inserted into the inner groove 41 and the middle groove 42, and the connecting pin 5 on the second rod 22 enters the first groove 61 through the opening 610 on the first step surface 44, and at the same time, the end of the second rod 22 extends into the inner groove 41 to abut and drive the connecting plate 32; when the second rod 22 is located at a suitable position in the first groove 61 and the second groove 62, that is, the docking rod 2 is restricted to move axially toward the spring groove 40 and the connecting pin 5 is located at the connection between the first groove 61 and the second groove 62, at this time, the first rod 21 is located in the limiting groove 43, and the second step surface 23 contacts the first step surface 44; wherein, the first rod 21 and the second rod 22 respectively cooperate with the inner groove 41, the middle groove 42 and the limiting groove 43, thereby increasing the contact area between the docking rod 2 and the mounting groove 4, which is beneficial to improving the tightness of the connection between the docking rod 2 and the mounting groove 4. Referring to FIG. 1 , preferably, a plurality of pin grooves are evenly spaced along the circumferential direction of the second rod 22 , and the cross-sectional shape of the pin grooves matches the cross-sectional shape of the connecting pin 5 , and the connecting pin 5 can be detachably inserted into the pin grooves. In this embodiment, the connecting pin 5 can be detachably inserted into the pin groove, so that the connecting pin 5 can be processed separately, making the processing and production more convenient. Referring to Figure 1, preferably, a plurality of connecting pins 5 are evenly arranged along the circumferential direction of the docking rod 2, and the connecting pins 5 are arranged in two rows along the axial direction of the docking rod 2, and the two rows of connecting pins 5 are staggered and distributed at intervals; the inner wall of the middle groove 42 is evenly spaced and a plurality of connecting grooves 6 are evenly arranged, and the projection of the connecting pins 5 in the axial direction of the docking rod 2 matches the projection of the connecting grooves 6 in the axial direction of the connecting rod 1. Specifically, the connecting pins 5 are arranged in two rows along the axial direction of the docking rod 2, and the positions of the two rows of connecting pins 5 on the second rod 22 are at different distances from the second step surface 23. Correspondingly, for the two rows of connecting pins 5 at different distances, the depth of the first groove 61 in the connecting groove 6 also corresponds thereto, and the distances of the second groove 62 and the third groove 63 from the first step surface 44 also correspond thereto. In this embodiment, the connecting pins 5 are arranged in two rows and along the axial direction of the docking rod 2. Accordingly, the number of the connecting grooves 6 is consistent with the number of the connecting pins 5. This structure is conducive to increasing the tightness of the connection between the docking rod 2 and the connecting rod 1. Referring to Figure 5, preferably, the stackable quick-release device also includes a fixing cylinder 11, a fixing plate 12, a fixing bolt 13 and a fixing nut. The fixing cylinder 11 is fixedly arranged on the end of the connecting rod 1 away from the mounting groove 4, and one end of the cascade tube 8 is used to be inserted into the fixing cylinder 11; a fixing groove is penetrated through the side wall of the fixing cylinder 11, and the fixing plates 12 are arranged on both sides of the fixing groove of the side wall of the fixing cylinder 11, and the two fixing plates 12 are used to be connected through the fixing bolts 13 and the fixing nuts. In this embodiment, when the connecting rod 1 is installed on one end of the cascade tube 8, one end of the cascade tube 8 is inserted into the fixing tube 11, and then the two fixing plates 12 are fixed by the cooperation between the fixing bolts 13 and the fixing nuts. Since the fixing plates 12 are arranged on both sides of the fixing grooves, when the fixing bolts 13 and the fixing nuts fix the fixing plates 12, the fixing tube 11 clamps and fixes one end of the cascade tube 8 outside one end of the cascade tube 8, so that the connecting rod 1 is connected to one end of the cascade tube 8. Referring to FIG. 5 , the present invention further provides a surgical navigation system, which can be used to determine the distance and orientation between the key cutting position and the anatomical structure during surgery. The surgical navigation system includes a cascade tube 8 and the stackable quick-release device as described above. The cascade tube 8 includes a first bend 81 and a second bend 82. Both the first bend 81 and the second bend 82 are "L" shaped structures. The connecting rod 1 of the stackable quick-release device is used to connect to one end of the first bend 81, and the docking rod 2 of the stackable quick-release device is used to connect to one end of the second bend 82. In this embodiment, when two adjacent cascade tubes 8 are connected, the docking rod 2 on the second bend tube 82 on one of the cascade tubes 8 is used to be inserted into the installation groove 4 of the connecting rod 1 on the first bend tube 81 on the other cascade tube 8 and abut against the elastic member 3. Among them, the first bend pipe 81 of the cascade pipe 8 is inserted into the fixing tube 11, and then the two fixing plates 12 are fixed by the cooperation between the fixing bolts 13 and the fixing nuts, so that the connecting rod 1 is connected to the first bend pipe 81 of the cascade pipe 8. Referring to Figure 5, preferably, the surgical navigation system also includes a rotating structure 7, and the end of the first curved tube 81 away from the connecting rod 1 and the end of the second curved tube 82 away from the docking rod 2 are connected through the rotating structure 7, so that the first curved tube 81 and the second curved tube 82 can rotate relative to each other. In this embodiment, the rotating structure 7 is installed on the cascade pipe 8 so that the first bend pipe 81 and the second bend pipe 82 of the cascade pipe 8 can rotate relative to each other. This structure is conducive to adjusting the rotation direction of the cascade pipe 8, and further conducive to adjusting the installation direction of two adjacent cascade pipes 8. Referring to FIGS. 3 and 4 , preferably, the rotating structure 7 comprises a connecting head 71, a rotating bearing 72, a limiting portion 73 and a connecting cover 74, and the end of the first curved tube 81 away from the connecting rod 1 is sleeved with the rotating bearing 72, and the end of the first curved tube 81 is located outside the rotating bearing 72 and is provided with the limiting portion 73; The end of the second curved tube 82 away from the docking rod 2 is fixedly connected to the connecting head 71, and the end of the connecting head 71 is provided with a connecting groove 75 matching the first curved tube 81, the rotating bearing 72 and the limiting portion 73. The end of the first curved tube 81 away from the connecting rod 1 is together with the rotating bearing 72 and the limiting portion 73 for installation in the connecting groove 75; the connecting cover 74 is used to be fixed to the connecting head 71 toward the connecting groove 75 by screws and limit the rotating bearing 72 and the limiting portion 73 in the connecting groove 75. Specifically, the first curved pipe 81 and the second curved pipe 82 can be arranged in exchange positions, that is, the first curved pipe 81 is used to be fixedly connected to the connecting head 71, and the limiting portion 73 and the rotating bearing 72 can be arranged on the second curved pipe 82. In this embodiment, the limiting portion 73 is provided to limit the position of the rotating bearing 72 to prevent the rotating bearing 72 from falling off the first bend pipe 81; the rotating bearing 72 and the connecting groove 75 cooperate with each other to rotationally connect the first bend pipe 81 and the second bend pipe 82, so that the first bend pipe 81 and the second bend pipe 82 of a cascade pipe 8 can rotate relative to each other, thereby increasing the flexibility of the cascade pipe 8 when in use, so that the cascade pipe 8 can be rotated according to actual needs to ensure the accuracy of the navigation position. Preferably, the surgical navigation system also includes a sensor and an operating device. The operating device is arranged at the tail end of the last cascade tube 8 in the surgical navigation system. The operating device is used to extend into the oral cavity and perform surgery on the oral cavity. The sensor is installed on the cascade tube 8. In this embodiment, the sensor is used to obtain the position of the cascade tube 8 and calculate and locate the operating device, and to represent the precise position of the operating device through coordinates, so as to perform distance measurement, leveling measurement and orientation determination during surgery, thereby improving the accuracy of the surgical navigation system during use and improving the safety of the surgery. Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A stackable quick-release device for connecting two adjacent cascade tubes (8) of a surgical navigation system, characterized in that: The stackable quick-release device comprises: a connecting rod (1), a docking rod (2) and an elastic member (3); the connecting rod (1) is arranged at one end of one of the cascade tubes (8), and the docking rod (2) is arranged at one end of the other cascade tube (8); an installation groove (4) is arranged on the end surface of the connecting rod (1); the elastic member (3) is used to be installed on the inner wall of the installation groove (4); the docking rod (2) on one of the cascade tubes (8) is used to be inserted into the installation groove (4) of the connecting rod (1) on the other cascade tube (8) and abut against the elastic member (3); The outer wall of the docking rod (2) is provided with a connecting pin (5); the inner wall of the installation groove (4) is provided with a connecting groove (6) matching the connecting pin (5), the connecting groove (6) comprising a first groove (61), a second groove (62) and a third groove (63), the first groove (61) being arranged along the axial direction of the connecting rod (1) and the opening (610) of the first groove (61) being arranged toward the inlet and outlet of the installation groove (4); the end of the first groove (61) away from the opening (610) is connected to the second groove (62) perpendicular to the first groove (61), the end of the second groove (62) away from the first groove (61) is connected to the third groove (63), and the third groove (63) is arranged in the same direction as the first groove (61); The docking rod (2) is used to be inserted into the installation groove (4) and rotated, so that the connecting pin (5) moves into the first groove (61) and moves from the first groove (61) to the second groove (62); the elastic member (3) is used to abut against the docking rod (2), so that the connecting pin (5) on the outer wall of the docking rod (2) is clamped in the third groove (63).

2. The stackable quick-release device according to claim 1, characterized in that: A guiding inclined surface (64) is provided in the second groove (62), and the guiding inclined surface (64) is arranged to be gradually inclined in a direction from the first groove (61) to the third groove (63) toward an end away from the opening (610).

3. The stackable quick-release device according to claim 1, characterized in that: A spring groove (40) connected to the mounting groove (4) is provided inside the connecting rod (1) on the inner wall of the mounting groove (4); the elastic member (3) comprises a connecting spring (31), the connecting spring (31) is installed in the spring groove (40), one end of the connecting spring (31) is connected to the inner wall of the spring groove (40), and the other end of the connecting spring (31) is used to be connected to the docking rod (2).

4. The stackable quick-release device according to claim 3, characterized in that: The elastic member (3) further comprises a connecting plate (32), the connecting plate (32) being used to move in the installation groove (4), one end of the spring groove (40) being connected to the inner wall of the spring groove (40), and the other end of the connecting spring (31) being connected to the connecting plate (32); a groove (33) is provided in the middle of a side of the connecting plate (32) away from the connecting spring (31), and the docking rod (2) is used to abut against the groove (33).

5. The stackable quick-release device according to claim 4, characterized in that: The mounting groove (4) comprises an inner groove (41), a middle groove (42) and a limit groove (43) which are sequentially connected and arranged from the inside to the outside, and the inner groove (41), the middle groove (42) and the limit groove (43) are coaxially arranged with the connecting rod (1); the diameter of the inner groove (41) is larger than the diameter of the middle groove (42), and the diameter of the limit groove (43) is larger than the diameter of the middle groove (42); the connecting plate (32) is used to move in the inner groove (41); the connecting groove (6) is arranged on the inner wall of the middle groove (42), and the connection between the limit groove (43) and the middle groove (42) has a first step surface (44), and the opening (610) of the first groove (61) is arranged toward the first step surface (44); The docking rod (2) comprises a first rod (21) and a second rod (22); the first rod (21) is used to connect with one end of the cascade tube (8); the diameter of the first rod (21) matches the limiting groove (43); the second rod (22) is used to be arranged at one end of the first rod (21) away from the cascade tube (8); the diameter of the second rod (22) matches the middle groove (42); a second step surface (23) is provided at the connection between the first rod (21) and the second rod (22); the second step surface (23) matches the first step surface (44); and the connecting pin (5) is arranged on the outer wall of the second rod (22).

6. The stackable quick-release device according to claim 5, characterized in that: A plurality of connecting pins (5) are evenly arranged along the circumferential direction of the docking rod (2), and two rows of connecting pins (5) are arranged along the axial direction of the docking rod (2), and the two rows of connecting pins (5) are arranged at intervals and staggered; a plurality of connecting grooves (6) are evenly arranged on the inner wall of the middle groove (42), and the projection of the connecting pins (5) in the axial direction of the docking rod (2) matches the projection of the connecting grooves (6) in the axial direction of the connecting rod (1).

7. The stackable quick-release device according to claim 1, characterized in that: It also comprises a fixing cylinder (11), a fixing plate (12), a fixing bolt (13) and a fixing nut, wherein the fixing cylinder (11) is fixedly arranged on an end of the connecting rod (1) away from the mounting groove (4), and one end of the cascade pipe (8) is used to be inserted into the fixing cylinder (11); a fixing groove is penetrated through the side wall of the fixing cylinder (11), and the fixing plates (12) are arranged on both sides of the fixing groove on the side wall of the fixing cylinder (11), and the two fixing plates (12) are used to be connected via the fixing bolt (13) and the fixing nut.

8. A surgical navigation system, characterized in that: The invention comprises a cascade pipe (8) and a stackable quick-release device as claimed in any one of claims 1 to 7, wherein the cascade pipe (8) comprises a first curved pipe (81) and a second curved pipe (82), wherein the first curved pipe (81) and the second curved pipe (82) are both "L" shaped structures, the connecting rod (1) of the stackable quick-release device is used to connect with one end of the first curved pipe (81), and the docking rod (2) of the stackable quick-release device is used to connect with one end of the second curved pipe (82).

9. The surgical navigation system according to claim 8, characterized in that: It also comprises a rotating structure (7), wherein an end of the first curved pipe (81) away from the connecting rod (1) and an end of the second curved pipe (82) away from the docking rod (2) are connected via the rotating structure (7), so that the first curved pipe (81) and the second curved pipe (82) can rotate relative to each other.

10. The surgical navigation system according to claim 9, characterized in that: The rotating structure (7) comprises a connecting head (71), a rotating bearing (72), a limiting portion (73) and a connecting cover (74); an end of the first curved tube (81) away from the connecting rod (1) is sleeved with the rotating bearing (72), and an end of the first curved tube (81) located outside the rotating bearing (72) is provided with the limiting portion (73); The end of the second curved tube (82) away from the docking rod (2) is fixedly connected to the connecting head (71); the end of the connecting head (71) is provided with a connecting groove (75) matching the first curved tube (81), the rotating bearing (72) and the limiting portion (73); the end of the first curved tube (81) away from the connecting rod (1) together with the rotating bearing (72) and the limiting portion (73) is used to be installed in the connecting groove (75); the connecting cover (74) is used to be fixed to the connecting head (71) toward the connecting groove (75) by means of screws and to limit the rotating bearing (72) and the limiting portion (73) in the connecting groove (75).

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