Connecting device and surgical navigation system

Abstract

A connecting device and a surgical navigation system. The connecting device is used for connecting two adjacent cascade pipes (6) of the surgical navigation system. The connecting device comprises connecting pipes (1), butt joint pipes (2), sleeves (3), and positioning beads (4); each connecting pipe (1) and each butt joint pipe (2) are respectively arranged at two ends of the corresponding cascade pipe (6); the butt joint pipe (2) on one cascade pipe (6) is sleeved on the outer wall of the connecting pipe (1) on the other cascade pipe (6); a connecting protrusion (11) is provided on the connecting pipe (1); a connecting groove (21) communicated with the interior of the butt joint pipe (2) is formed in the inner wall of the butt joint pipe (2). On the one hand, the dual fixed connection facilitates adjusting the length of the cascade pipes (6), so that, on the basis of the actual situation, a user can adjust the length of the cascade pipes (6) in the surgical navigation system, and on the other hand, the gap at the joint of the two adjacent cascade pipes (6) during connection can be reduced, so that the connection stability is improved, the connection accuracy is improved, and errors are reduced.

Description

Connecting device and surgical navigation system Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a connecting device and a surgical navigation system. Background Art

[0002] With the popularization of digital technology, oral surgery usually involves inserting special instruments into the patient's mouth to perform delicate surgical operations. Due to the limited oral space, the position of the instrument cannot be accurately obtained after it is inserted into the mouth, resulting in increased surgical risks and poor postoperative effects. Technical issues

[0003] Currently, mechanical navigation devices are commonly used to obtain positional information. The fit of the cascade tubes in these devices is crucial to the accuracy of the entire navigation process. In existing surgical navigation systems, the length of the cascade tubes is typically not adjustable. For patients with well-developed cheek muscles or excessive fat, the length extending from the mouth may not meet clinical requirements. Even after fixation, the thickness of the cheek muscles or fat can cause the tubes to loosen during surgery, resulting in errors and serious complications. Technical Solutions

[0004] The present invention aims to solve the problem that the length of the cascade tube in the existing surgical navigation system cannot be adjusted.

[0005] In order to solve the above problems, the present invention proposes the following technical solutions:

[0006] A connecting device for connecting two adjacent cascade tubes of a surgical navigation system, the connecting device comprising: a connecting tube, a butt joint tube, a sleeve, and a positioning bead, the connecting tube and the butt joint tube being respectively disposed at both ends of the cascade tubes; the butt joint tube on one of the cascade tubes being sleeved onto the outside of the connecting tube on the other cascade tube;

[0007] The connecting tube is provided with a connecting protrusion; the inner wall of the butt joint tube is provided with a connecting groove which is in communication with the interior of the butt joint tube, the opening of the connecting groove is arranged toward the end away from the cascade tube and the connecting groove matches the connecting protrusion; when the butt joint tube is sleeved on the outside of the connecting tube, the connecting protrusion is used to move from the opening of the connecting groove into the connecting groove;

[0008] The outer wall of the connecting pipe is provided with a connecting bead groove that matches the positioning bead; the side wall of the butt joint pipe is penetrated by a butt joint bead hole that matches the positioning bead; when the butt joint pipe is sleeved on the outside of the connecting pipe, the butt joint bead hole is used to align with the connecting bead groove to form a positioning bead groove;

[0009] The inner wall of the sleeve is provided with an annular groove along its circumferential direction, and a plurality of the positioning beads are movably arranged in the annular groove. When the docking tube is sleeved on the outside of the connecting tube, the sleeve is used to be sleeved on the outside of the docking tube so that the positioning beads are clamped in the positioning bead groove. Beneficial effects

[0010] The connection device provided by the present invention has, but is not limited to, the following beneficial effects compared to the prior art:

[0011] 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 connecting device; during installation, the docking tube on one cascade tube is first sleeved on the outer wall of the connecting tube on the other cascade tube, and the connecting protrusion on the connecting tube is moved from the opening of the connecting groove on the inner wall of the docking tube to the connecting groove to achieve a preliminary fixed connection, and the docking bead hole is aligned with the connecting bead groove to form a positioning bead groove; thereafter, the sleeve originally sleeved on the docking tube away from the docking bead hole is moved to a position on the docking tube facing the positioning bead groove, so that the annular groove in the sleeve is aligned with the positioning bead groove; then, the sleeve is rotated, and the sleeve drives the positioning bead to move in the annular groove during the rotation process and makes the positioning bead move in the annular groove and make the positioning bead move in the annular groove. The positioning beads move into the positioning bead groove, thereby realizing a secondary fixed connection. The connecting bead groove and the docking bead hole are used to accommodate the positioning beads and limit the position of the positioning beads, ensuring that the positioning beads are always in a relatively ideal position; wherein, the initial fixed connection is realized by the mutual cooperation between the connecting protrusion and the connecting groove, and the secondary fixed connection is realized by the mutual cooperation between the sleeve, the positioning beads and the positioning bead groove to prevent relative rotation between the connecting tube and the docking tube. On the one hand, the double fixed connection is conducive to adjusting the length 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. On the other hand, it is conducive to reducing the gap at the connection between the two adjacent cascade tubes when connected, thereby increasing the stability of the connection, improving the connection accuracy and reducing errors.

[0012] Preferably, the connecting tube comprises a fixing tube, a connecting ring and connecting teeth, the connecting protrusion is provided on the outer wall of the connecting ring, one end of the connecting ring is provided with the connecting teeth protruding along its axial direction, and a plurality of the connecting teeth are evenly spaced along the circumference of the connecting ring in a square shape;

[0013] The fixed tube is used to be fixedly connected to the cascade tube, and the connecting bead groove is arranged on the outer wall of the fixed tube; the end of the fixed tube facing the butt tube is provided with a tooth groove matching the connecting tooth, and the connecting tooth is used to be inserted into the tooth groove and connected by cold welding.

[0014] Preferably, the connecting tooth includes a tip, a middle part and a root part, the root part is fixed to the end of the connecting ring, the middle part is used to connect between the tip and the root part, the cross-section of the tip part is a triangular structure, the cross-section of the middle part is an isosceles trapezoidal structure, the cross-section of the root part is a rectangular structure, one end of the longer base side of the cross-section of the middle part is connected to the root part, and one end of the shorter base side of the cross-section of the middle part is connected to the tip part; the width of the root part matches the width of the tooth groove.

[0015] Preferably, the connecting groove includes a first slide groove, a second slide groove and a third slide groove, the first slide groove is arranged along the axial direction of the docking tube and the opening of the first slide groove passes through the end of the docking tube; the end of the first slide groove away from the end of the docking tube is connected to the second slide groove perpendicular to the first slide groove; the third slide groove is arranged along the axial direction of the docking tube, the third slide groove is connected to the end of the second slide groove away from the first slide groove and is arranged in the opposite direction to the first slide groove.

[0016] Preferably, the connecting groove further includes a limiting groove colinear with the third sliding groove, and the limiting groove is arranged at one end of the third sliding groove close to the second sliding groove.

[0017] Preferably, a thread groove is provided on the inner wall of one end of the cascade pipe away from the connecting pipe, and a connecting thread matching the thread groove is provided on the outer wall of one end of the butt joint pipe, and the butt joint pipe is threadedly connected to the inside of the cascade pipe.

[0018] Preferably, the connecting device also includes an auxiliary spring, and a spring groove is provided on the inner wall of the cascade tube away from the connecting tube. The spring groove is connected to the threaded groove, and the auxiliary spring is installed in the spring groove. One end of the auxiliary spring abuts against the inner wall of the spring groove, and the other end abuts against the end of the docking tube.

[0019] Preferably, the outer wall of the connecting tube has a plurality of connecting bead grooves evenly distributed along its circumferential direction, and the connecting bead grooves are arranged in multiple rows, and the connecting bead grooves in two adjacent rows are staggered; the docking bead holes are adapted to the connecting bead grooves.

[0020] Preferably, the connecting device further comprises a limiting ring, and the limiting ring is fixed to the outer wall of one end of the butt joint tube close to the butt joint bead hole, and the outer diameter of the limiting ring is greater than the inner diameter of the sleeve.

[0021] The present invention also provides a surgical navigation system, including a cascade tube and a connecting device as described above, the cascade tube including a straight tube, a first bend tube and a second bend tube, the first bend tube and the second bend tube are respectively fixedly connected to the two ends of the straight tube, the connecting tube of the connecting device is fixedly connected to the first bend tube, and the docking tube of the connecting device is threadedly connected to the second bend tube.

[0022] The beneficial effects of the surgical navigation system compared to the prior art are consistent with those of the connecting device and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic diagram of the overall structure of a connecting device according to an embodiment of the present invention;

[0024] FIG2 is a schematic diagram of a partially enlarged structure of point A in FIG1 according to an embodiment of the present invention;

[0025] FIG3 is a schematic cross-sectional view of a butt joint according to an embodiment of the present invention;

[0026] FIG4 is a schematic diagram of the overall cross-sectional structure of a connecting device according to an embodiment of the present invention;

[0027] FIG5 is a schematic structural diagram of a cascade tube of a surgical navigation system according to an embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1 connecting pipe, 11 connecting protrusion, 12 connecting bead groove, 13 fixing pipe, 14 connecting ring, 15 connecting tooth, 151 tip, 152 middle, 153 root, 16 tooth groove, 2 docking pipe, 21 connecting groove, 211 first slide groove, 212 second slide groove, 213 third slide groove, 214 limiting groove, 22 docking bead hole, 23 limiting ring, 24 connecting thread, 3 sleeve, 30 ring groove, 4 positioning bead, 5 auxiliary spring, 50 spring groove, 6 cascade pipe, 61 straight pipe, 62 first bend pipe, 63 second bend pipe, 64 rotary bearing. Modes for Carrying Out the Invention

[0030] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, 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 should not be understood as limiting the present invention.

[0032] It should be noted that in the coordinate system XYZ provided herein, the positive direction of the X-axis represents the right, the negative direction of the X-axis represents the left, the positive direction of the Y-axis represents the front, the negative direction of the Y-axis represents the back, the positive direction of the Z-axis represents the top, and the negative 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 operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] 1-5 , the present invention provides a connecting device for connecting two adjacent cascade tubes 6 of a surgical navigation system. The connecting device comprises: a connecting tube 1, a butt joint tube 2, a sleeve 3, and a positioning bead 4. The connecting tube 1 and the butt joint tube 2 are respectively arranged at the two ends of the cascade tubes 6; the butt joint tube 2 on one of the cascade tubes 6 is used to be sleeved on the outside of the connecting tube 1 on the other cascade tube 6.

[0034] 2-3 , a connecting protrusion 11 is provided on the connecting pipe 1; a connecting groove 21 is provided on the inner wall of the butt joint pipe 2 and is connected to the interior of the butt joint pipe 2, and the opening of the connecting groove 21 is arranged toward the end away from the cascade pipe 6 and the connecting groove 21 matches the connecting protrusion 11; when the butt joint pipe 2 is sleeved on the outside of the connecting pipe 1, the connecting protrusion 11 is used to move from the opening of the connecting groove 21 to the inside of the connecting groove 21.

[0035] Referring to Figure 4, the outer wall of the connecting pipe 1 is provided with a connecting bead groove 12 that matches the positioning bead 4; the side wall of the docking pipe 2 is penetrated by a docking bead hole 22 that matches the positioning bead 4; when the docking pipe 2 is sleeved on the outside of the connecting pipe 1, the docking bead hole 22 is used to align with the connecting bead groove 12 to form a positioning bead groove.

[0036] Referring to Figure 4, the inner wall of the sleeve 3 is provided with an annular groove 30 along its circumferential direction, and a plurality of the positioning beads 4 are movably arranged in the annular groove 30. When the docking tube 2 is sleeved on the outside of the connecting tube 1, the sleeve 3 is used to be sleeved on the outside of the docking tube 2 so that the positioning beads 4 are clamped in the positioning bead groove.

[0037] In this embodiment, when the cascade tubes 6 in the surgical navigation system are shorter, the number of the cascade tubes 6 can be increased and the two adjacent cascade tubes 6 can be connected through the connecting device; during installation, the docking tube 2 on one cascade tube 6 is first sleeved on the outer wall of the connecting tube 1 on the other cascade tube 6, and the connecting protrusion 11 on the connecting tube 1 is moved from the opening of the connecting groove 21 on the inner wall of the docking tube 2 to the connecting groove 21 to achieve a preliminary fixed connection, and the docking bead hole 22 is aligned with the connecting bead groove 12 to form the positioning bead groove; thereafter, the sleeve 3 originally sleeved on the docking tube 2 away from the docking bead hole 22 is moved to a position on the docking tube 2 facing the positioning bead groove, so that the annular groove 30 in the sleeve 3 is aligned with the positioning bead groove; then, the sleeve 3 is rotated, and the sleeve 3 is rotated during the rotation. During the process, the positioning bead 4 is driven to move in the annular groove 30 and the positioning bead 4 is moved into the positioning bead groove, thereby realizing a secondary fixed connection. The connecting bead groove 12 and the docking bead hole 22 are used to accommodate the positioning bead 4 and limit the position of the positioning bead 4 to ensure that the positioning bead 4 is always in an ideal position; wherein, the initial fixed connection is realized by the mutual cooperation between the connecting protrusion 11 and the connecting groove 21, and the secondary fixed connection is realized by the mutual cooperation between the sleeve 3, the positioning bead 4 and the positioning bead groove to prevent relative rotation between the connecting tube 1 and the docking tube 2. On the one hand, the double fixed connection is conducive to adjusting the length 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. On the other hand, it 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 errors.

[0038] Referring to Figures 1 and 2, preferably, the connecting tube 1 includes a fixing tube 13, a connecting ring 14 and connecting teeth 15, the connecting protrusion 11 is arranged on the outer wall of the connecting ring 14, and one end of the connecting ring 14 is provided with the connecting teeth 15 protruding along its axial direction, and a plurality of the connecting teeth 15 are evenly spaced along the circumferential square of the connecting ring 14.

[0039] The fixed tube 13 is used to be fixedly connected to the cascade tube 6, and the connecting bead groove 12 is arranged on the outer wall of the fixed tube 13; the fixed tube 13 is provided with a tooth groove 16 matching the connecting tooth 15 at one end facing the docking tube 2, and the connecting tooth 15 is used to be inserted into the tooth groove 16 and connected by cold welding.

[0040] Specifically, the connecting teeth 15 and the tooth grooves 16 are arranged in a one-to-one correspondence. When the connecting device is connected according to a preset position, the connecting teeth 15 and the tooth grooves 16 are engaged one by one.

[0041] In this embodiment, during installation, the connecting protrusion 11 on the connecting ring 14 is first aligned with the opening of the connecting groove 21 on the butt joint 2, and then the connecting ring 14 is first moved to the inside of the butt joint 2, and the connecting protrusion 11 is moved into the connecting groove 21 to prevent the connecting ring 14 from rotating in the butt joint 2, and then the connecting ring 14 is connected to the fixed tube 13, that is, the connecting teeth 15 on the connecting ring 14 are inserted into the tooth groove 16 and connected by cold welding; wherein, the setting of the connecting protrusion 11 and the connecting groove 21 is conducive to preventing the generation of rotational virtual position inside the connecting device, In actual use, if the connecting protrusion 11 is directly provided on the fixed tube 13, it may not be possible to ensure that it is aligned with the connecting groove 21 during installation. Therefore, the connecting ring 14 is provided. During installation, the connecting ring 14 can be rotated first so that the connecting protrusion 11 is aligned with the connecting groove 21 and the connecting ring 14 is installed into the docking tube 2. Then, the connecting teeth 15 are connected to the tooth grooves 16 to fix the connecting ring 14 on the fixed tube 13. This structure is conducive to adjusting the circumferential position of the connecting protrusion 11 so that the connecting protrusion 11 can be aligned with the opening of the connecting groove 21 to improve the convenience of installation.

[0042] Referring to Figure 2, preferably, the connecting tooth 15 includes a tip 151, a middle part 152 and a root 153, the root 153 is fixed to the end of the connecting ring 14, and the middle part 152 is used to connect between the tip 151 and the root 153, the cross-section of the tip 151 is a triangular structure, the cross-section of the middle part 152 is an isosceles trapezoidal structure, and the cross-section of the root 153 is a rectangular structure, one end of the longer bottom side of the cross-section of the middle part 152 is connected to the root 153, and one end of the shorter bottom side of the cross-section of the middle part 152 is connected to the tip 151; the width of the root 153 matches the width of the tooth groove 16.

[0043] Specifically, the tip 151 is an isosceles triangle, the length of the base side of one end of the cross section of the middle portion 152 is consistent with the length of the base side of the triangle of the tip 151, and the length of the base side of the other end of the cross section of the middle portion 152 is consistent with the width of the root 153. When the connecting tooth 15 is inserted into the tooth groove 16, the root 153 is used to provide friction with the tooth groove 16 so that the connecting tooth 15 and the tooth groove 16 engage with each other.

[0044] Among them, the acute angle formed by the waistline of the cross-section of the tip 151 of the connecting tooth 15 and the axis of the connecting ring 14 is 40°, and the acute angle formed by the waistline of the cross-section of the middle part 152 and the axis of the connecting ring 14 is 8°. This structure is conducive to the rapid insertion of the connecting tooth 15 into the tooth groove 16.

[0045] In this embodiment, the arrangement of the tip 151, the middle portion 152 and the root 153 facilitates the rapid insertion of the connecting tooth 15 into the tooth groove 16. The friction with the tooth groove 16 is maintained by the root 153, and the cold welding effect facilitates strengthening the connection between the connecting ring 14 and the fixing tube 13.

[0046] Referring to Figure 3, preferably, the connecting groove 21 includes a first slide groove 211, a second slide groove 212 and a third slide groove 213, the first slide groove 211 is arranged along the axial direction of the docking tube 2 and the opening of the first slide groove 211 passes through the end of the docking tube 2; the end of the first slide groove 211 away from the end of the docking tube 2 is connected to the second slide groove 212 perpendicular to the first slide groove 211; the third slide groove 213 is arranged along the axial direction of the docking tube 2, the third slide groove 213 is connected to the end of the second slide groove 212 away from the first slide groove 211 and is arranged in the opposite direction of the first slide groove 211.

[0047] Specifically, the end of the connecting protrusion 11 away from the fixing tube 13 is the first end, and the other end is the second end. The cross-sectional width of the first end is smaller than the cross-sectional width of the second end; the width of the first slide groove 211 is larger than the cross-sectional width of the second end of the connecting protrusion 11, so that the connecting protrusion 11 can smoothly enter the connecting groove 21 from the opening of the first slide groove 211; the second slide groove 212 is provided with an arc structure at the connection between the first slide groove 211 and the second slide groove 212, and the width of the second slide groove 212 is larger than the length of the connecting protrusion 11, so that when the connecting ring 14 is located at the second When the first slide groove 211 is at its deepest, it is rotated to screw the connecting protrusion 11 toward the second slide groove 212; the width of the third slide groove 213 close to the second slide groove 212 is greater than the cross-sectional width of the second end of the connecting protrusion 11, and the width of the third slide groove 213 away from the second slide groove 212 matches the cross-sectional width of the first end of the connecting protrusion 11, and the two waistlines of the third slide groove 213 are respectively arranged parallel to the two waistlines of the connecting protrusion 11, so that the connecting protrusion 11 can be moved to the third slide groove 213 to achieve fixed engagement.

[0048] In this embodiment, the connecting protrusion 11, the first slide groove 211, the second slide groove 212 and the third slide groove 213 cooperate with each other, so that the connecting ring 14 can be initially fixed to the docking tube 2 by moving and rotating when inserted into the docking tube 2, which is conducive to enhancing the fixing effect.

[0049] 3 , preferably, the connecting groove 21 further includes a limiting groove 214 colinear with the third sliding groove 213 , and the limiting groove 214 is provided at one end of the third sliding groove 213 close to the second sliding groove 212 .

[0050] In this embodiment, the provision of the limiting groove 214 is beneficial to preventing the connecting protrusion 11 from falling off from the connecting groove 21 , thereby preventing the connecting pipe 1 from falling off from the butt-jointing pipe 2 .

[0051] Referring to Figure 3, preferably, the inner wall of the cascade pipe 6 away from the connecting pipe 1 is provided with a thread groove, and the outer wall of one end of the docking pipe 2 is provided with a connecting thread 24 matching the thread groove, and the docking pipe 2 is threadedly connected to the cascade pipe 6.

[0052] In this embodiment, the butt joint pipe 2 is threadedly connected to the end of the cascade pipe 6 away from the connecting pipe 1. This structure allows the butt joint pipe 2 to be detachably installed on the cascade pipe 6, thereby increasing the convenience of the user during installation or disassembly.

[0053] Referring to Figure 4, preferably, the connecting device also includes an auxiliary spring 5, and the inner wall of the cascade tube 6 away from the connecting tube 1 is further provided with a spring groove 50, and the spring groove 50 is connected to the threaded groove. The auxiliary spring 5 is installed in the spring groove 50, and one end of the auxiliary spring 5 abuts against the inner wall of the spring groove 50, and the other end abuts against the end of the docking tube 2.

[0054] Specifically, one end of the auxiliary spring 5 can also be sleeved on the outside of the docking tube 2 and fixedly connected to the outside of the docking tube 2, and the other end of the auxiliary spring 5 abuts against the inner wall of the spring groove 50, so that the auxiliary spring 5 is connected between the docking tube 2 and the inner wall of the spring groove 50.

[0055] In this embodiment, after tightening the connecting thread 24, the auxiliary spring 5 is squeezed to apply force to the butt joint pipe 2 in a direction close to the connecting pipe 1, which helps to avoid axial voids after the butt joint pipe 2 and the cascade pipe 6 are tightened.

[0056] Referring to Figure 1, preferably, the outer wall of the connecting tube 1 has multiple connecting bead grooves 12 evenly distributed along its circumferential direction, and the connecting bead grooves 12 are arranged in multiple rows, and the connecting bead grooves 12 in two adjacent rows are staggered; the docking bead holes 22 are adapted to the connecting bead grooves 12.

[0057] Specifically, the number of the positioning beads 4 is consistent with the number of the connecting bead grooves 12 .

[0058] In this embodiment, the connecting bead grooves 12 of two adjacent rows are staggered and the positioning bead grooves of two adjacent rows are also staggered. The positioning beads 4 are snapped into the staggered positioning bead grooves, which is beneficial to enhance the stability of the secondary connection.

[0059] 3-4 , preferably, the connecting device further comprises a limiting ring 23 , and the limiting ring 23 is fixed to the outer wall of one end of the butt joint pipe 2 close to the butt joint hole 22 , and the outer diameter of the limiting ring 23 is greater than the inner diameter of the sleeve 3 .

[0060] In this embodiment, the setting of the limiting ring 23 is helpful to prevent the sleeve 3 from being detached from the butt joint 2.

[0061] fall.

[0062] Referring to Figure 5, the present invention also provides a surgical navigation system, including a cascade tube 6 and a connecting device as described above, the cascade tube 6 includes a straight tube 61, a first curved tube 62 and a second curved tube 63, the first curved tube 62 and the second curved tube 63 are respectively fixedly connected to the two ends of the straight tube 61, the connecting tube 1 of the connecting device is fixedly connected to the first curved tube 62, and the docking tube 2 of the connecting device is threadedly connected to the second curved tube 63.

[0063] The beneficial effects of the surgical navigation system compared to the prior art are consistent with those of the connecting device and will not be described in detail here.

[0064] Referring to Figure 5, the surgical navigation system also includes a rotary bearing 64, a sensor and an operating device. The rotary bearing 64 is arranged on the second curved tube 63 and the straight tube 61, so that the cascade tube 6 can be rotated according to actual needs to ensure the accuracy of the navigation position; the operating device is arranged at the tail end of the last cascade tube 6 in the surgical navigation system, and the operating device is used to extend into the oral cavity and perform surgery on the oral cavity.

[0065] In this embodiment, the sensor is used to obtain the position of the cascade tube 6 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 surgical safety.

[0066] 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 connecting device for connecting two adjacent cascade tubes (6) of a surgical navigation system, characterized in that: The connecting device comprises: a connecting pipe (1), a butt-joint pipe (2), a sleeve (3) and a positioning bead (4); the connecting pipe (1) and the butt-joint pipe (2) are used to be respectively arranged at two ends of the cascade pipe (6); the butt-joint pipe (2) on one of the cascade pipes (6) is used to be sleeved on the outside of the connecting pipe (1) on another of the cascade pipes (6); The connecting pipe (1) is provided with a connecting protrusion (11); the inner wall of the butt-joint pipe (2) is provided with a connecting groove (21) which is in communication with the interior of the butt-joint pipe (2); the opening of the connecting groove (21) is arranged towards an end away from the cascade pipe (6) and the connecting groove (21) matches the connecting protrusion (11); when the butt-joint pipe (2) is sleeved on the outside of the connecting pipe (1), the connecting protrusion (11) is used to move from the opening of the connecting groove (21) into the inside of the connecting groove (21); The outer wall of the connecting tube (1) is provided with a connecting bead groove (12) matching the positioning bead (4); the side wall of the butt joint tube (2) is penetrated with a butt joint bead hole (22) matching the positioning bead (4); when the butt joint tube (2) is sleeved on the outside of the connecting tube (1), the butt joint bead hole (22) is used to align with the connecting bead groove (12) to form a positioning bead groove; The inner wall of the sleeve (3) is provided with an annular groove (30) along its circumferential direction, and a plurality of the positioning beads (4) are movably arranged in the annular groove (30). When the butt joint pipe (2) is sleeved on the outside of the connecting pipe (1), the sleeve (3) is used to be sleeved on the outside of the butt joint pipe (2) so that the positioning beads (4) are clamped in the positioning bead groove.

2. The connection device according to claim 1, characterized in that: The connecting tube (1) comprises a fixing tube (13), a connecting ring (14) and connecting teeth (15); the connecting protrusion (11) is arranged on the outer wall of the connecting ring (14); one end of the connecting ring (14) is provided with the connecting teeth (15) protruding along the axial direction thereof; a plurality of connecting teeth (15) are evenly spaced in a square shape along the circumference of the connecting ring (14); The fixed tube (13) is used for fixed connection with the cascade tube (6), and the connecting bead groove (12) is arranged on the outer wall of the fixed tube (13); a tooth groove (16) matching the connecting tooth (15) is arranged at one end of the fixed tube (13) facing the butt tube (2), and the connecting tooth (15) is used for being inserted into the tooth groove (16) and connected by cold welding.

3. The connection device according to claim 2, characterized in that: The connecting tooth (15) comprises a tip (151), a middle part (152) and a root (153); the root (153) is fixed to the end of the connecting ring (14); the middle part (152) is used to connect between the tip (151) and the root (153); the cross section of the tip (151) is a triangular structure; the cross section of the middle part (152) is an isosceles trapezoidal structure; the cross section of the root (153) is a rectangular structure; one end of the longer bottom side of the cross section of the middle part (152) is connected to the root (153); and one end of the shorter bottom side of the cross section of the middle part (152) is connected to the tip (151); the width of the root (153) matches the width of the tooth groove (16).

4. The connection device according to claim 1, characterized in that: The connecting groove (21) comprises a first slide groove (211), a second slide groove (212) and a third slide groove (213); the first slide groove (211) is arranged along the axial direction of the butt joint tube (2) and the opening of the first slide groove (211) passes through the end of the butt joint tube (2); an end of the first slide groove (211) away from the end of the butt joint tube (2) is connected to the second slide groove (212) perpendicular to the first slide groove (211); the third slide groove (213) is arranged along the axial direction of the butt joint tube (2), the third slide groove (213) is connected to an end of the second slide groove (212) away from the first slide groove (211) and is arranged in the opposite direction to the first slide groove (211).

5. The connection device according to claim 4, characterized in that: The connecting groove (21) further comprises a limiting groove (214) colinear with the third sliding groove (213), wherein the limiting groove (214) is arranged at one end of the third sliding groove (213) close to the second sliding groove (212).

6. The connection device according to claim 1, characterized in that: The inner wall of one end of the cascade pipe (6) away from the connecting pipe (1) is provided with a thread groove, and the outer wall of one end of the butt joint pipe (2) is provided with a connecting thread (24) matching the thread groove, and the butt joint pipe (2) is threadedly connected to the inside of the cascade pipe (6).

7. The connection device according to claim 6, characterized in that: The cascade tube (6) further comprises an auxiliary spring (5); an inner wall of one end of the cascade tube (6) away from the connecting tube (1) is further provided with a spring groove (50); the spring groove (50) is communicated with the thread groove; the auxiliary spring (5) is installed in the spring groove (50); one end of the auxiliary spring (5) abuts against the inner wall of the spring groove (50); and the other end abuts against the end of the butt tube (2).

8. The connection device according to claim 1, characterized in that: The outer wall of the connecting tube (1) has a plurality of connecting bead grooves (12) evenly spaced apart along its circumferential direction, the connecting bead grooves (12) are arranged in a plurality of rows, and the connecting bead grooves (12) in two adjacent rows are staggered; the docking bead holes (22) are adapted to the connecting bead grooves (12).

9. The connection device according to claim 1, characterized in that: It also comprises a limiting ring (23), the limiting ring (23) being fixed to the outer wall of one end of the butt joint tube (2) close to the butt joint bead hole (22), and the outer diameter of the limiting ring (23) is greater than the inner diameter of the sleeve (3).

10. A surgical navigation system, characterized in that: The invention comprises a cascade pipe (6) and a connecting device according to any one of claims 1 to 9, wherein the cascade pipe (6) comprises a straight pipe (61), a first curved pipe (62) and a second curved pipe (63), the first curved pipe (62) and the second curved pipe (63) are respectively fixedly connected to two ends of the straight pipe (61), a connecting pipe (1) of the connecting device is fixedly connected to the first curved pipe (62), and a butt-joint pipe (2) of the connecting device is threadedly connected to the second curved pipe (63).

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