WO2024255653A1 - 一种连接装置及手术导航系统 - Google Patents

一种连接装置及手术导航系统 Download PDF

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Publication number
WO2024255653A1
WO2024255653A1 PCT/CN2024/097391 CN2024097391W WO2024255653A1 WO 2024255653 A1 WO2024255653 A1 WO 2024255653A1 CN 2024097391 W CN2024097391 W CN 2024097391W WO 2024255653 A1 WO2024255653 A1 WO 2024255653A1
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WO
WIPO (PCT)
Prior art keywords
tube
groove
connection
pipe
cascade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2024/097391
Other languages
English (en)
French (fr)
Inventor
蒋灿华
梁烨
左国坤
张佳楫
郑雨天
肖聪
宋涛
邓华
蹇爱
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Institute of Material Technology and Engineering of CAS
Central South University
Original Assignee
Ningbo Institute of Material Technology and Engineering of CAS
Central South University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Institute of Material Technology and Engineering of CAS, Central South University filed Critical Ningbo Institute of Material Technology and Engineering of CAS
Priority to US18/994,640 priority Critical patent/US12514654B2/en
Publication of WO2024255653A1 publication Critical patent/WO2024255653A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/18—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
    • A61B2034/2072—Reference field transducer attached to an instrument or patient
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

Definitions

  • the present invention relates to the technical field of medical devices, and in particular to a connecting device and a surgical navigation system.
  • 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, which increases the risk of surgery and worsens the postoperative effect.
  • the cascade tube on the mechanical navigation device is usually used to obtain position information. Whether the cascade tube on the mechanical navigation device is suitable is related to the accuracy of the entire navigation.
  • the length of the cascade tube in the surgical navigation system is usually not adjustable. When the patient has well-developed cheek muscles or more fat, the length extending from the mouth cannot meet clinical needs. Even after fixation, it will loosen during surgery due to the thickness of cheek muscles or fat, resulting in errors, which will cause serious consequences.
  • the present invention aims to solve the problem that the length of the cascade tube in the existing surgical navigation system cannot be adjusted.
  • the present invention proposes the following technical solutions:
  • a connecting device for connecting two adjacent cascade tubes of a surgical navigation system comprising: a connecting tube, a butt joint tube, a sleeve and a positioning bead, the connecting tube and the butt joint tube are used to be respectively arranged at the two ends of the cascade tubes; the butt joint tube on one of the cascade tubes is used to be sleeved on the outside of the connecting tube on the other cascade tube;
  • the connecting pipe is provided with a connecting protrusion;
  • the inner wall of the butt joint pipe is provided with a connecting groove which is in communication with the interior of the butt joint pipe, the opening of the connecting groove is arranged toward the end away from the cascade pipe and the connecting groove matches the connecting protrusion; when the butt joint pipe is sleeved on the outside of the connecting pipe, the connecting protrusion is used to move from the opening of the connecting groove into the connecting groove;
  • the outer wall of the connecting pipe is provided with a connecting bead groove matching the positioning bead; the side wall of the butt joint pipe is penetrated with a butt joint bead hole matching the positioning bead; when the butt joint pipe is sleeved outside the connecting pipe, the butt joint bead hole is used to align with the connecting bead groove to form a positioning bead groove;
  • 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.
  • connection device provided by the present invention has the following beneficial effects but is not limited to them:
  • the number of cascade tubes in the surgical navigation system 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; then, the sleeve originally sleeved on the docking tube away from the docking bead hole is moved to a position on the docking tube that is opposite to 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 connecting bead groove and the docking bead hole are used to accommodate the positioning beads and limit the position of the positioning beads to ensure that the positioning beads are always in a more ideal position; wherein, the initial fixed connection is achieved through the cooperation between the connecting protrusion and the connecting groove, and the secondary fixed connection is achieved through the cooperation between the sleeve, the positioning beads and the positioning bead groove to prevent relative rotation between the connecting tube and the docking tube.
  • the double fixed connection is beneficial to adjusting the length of the cascade tube on the one hand, so that the user can adjust the length of the cascade tube in the surgical navigation system according to actual conditions, and on the other hand, it is beneficial to reduce 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.
  • the connecting tube comprises a fixing tube, a connecting ring and connecting teeth
  • the connecting protrusion is arranged on the outer wall of the connecting ring
  • one end of the connecting ring is provided with the connecting teeth protruding along the axial direction thereof, and a plurality of the connecting teeth are evenly spaced in a square shape along the circumference of the connecting ring;
  • the fixed tube is used for fixed connection with 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 for being inserted into the tooth groove and connected by cold welding.
  • 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
  • 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.
  • 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 butt joint tube and the opening of the first slide groove passes through the end of the butt joint tube
  • the end of the first slide groove away from the end of the butt joint 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 butt joint 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.
  • the connecting groove further comprises 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.
  • 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.
  • the connecting device also includes an auxiliary spring, and a spring groove is provided on the inner wall of one end of the cascade tube away from the connecting tube, the spring groove is communicated with 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.
  • the outer wall of the connecting tube has a plurality of connecting bead grooves evenly spaced along its circumferential direction, 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.
  • 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.
  • 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 curved tube and a second curved tube, the first curved tube and the second curved 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 curved tube, and the docking tube of the connecting device is threadedly connected to the second curved tube.
  • FIG1 is a schematic diagram of the overall structure of a connecting device according to an embodiment of the present invention.
  • FIG2 is a schematic diagram of a partially enlarged structure of point A in FIG1 according to an embodiment of the present invention
  • FIG3 is a schematic cross-sectional view of a butt joint according to an embodiment of the present invention.
  • FIG4 is a schematic diagram of the overall cross-sectional structure of a connecting device according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of the structure of the cascade tube of the surgical navigation system according to an embodiment of the present invention.
  • 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
  • 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.
  • the present invention provides a connecting device for connecting two adjacent cascade tubes 6 of a surgical navigation system, the connecting device comprising: 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 used to be respectively arranged at both 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.
  • a connecting protrusion 11 is provided on the connecting pipe 1; a connecting groove 21 connected to the interior of the connecting pipe 2 is provided on the inner wall of the connecting pipe 2, 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 connecting 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.
  • the outer wall of the connecting pipe 1 is provided with a connecting bead groove 12 matching the positioning bead 4; the side wall of the butt tube 2 is penetrated with a docking bead hole 22 matching the positioning bead 4; when the butt tube 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.
  • 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.
  • the sleeve 3 is used to be sleeved on the outside of the butt joint tube 2 so that the positioning beads 4 are clamped in the positioning bead groove.
  • the number of the cascade tubes 6 in the surgical navigation system 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 inside of 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 and away from the docking bead hole 22 is moved to The butt joint pipe 2 is positioned opposite to the positioning bead groove so that the annular groove 30 in the sleeve 3 is aligned with the positioning bead groove; then, the
  • the double fixed connection is used to prevent relative rotation between the connecting tube 1 and the butt tube 2.
  • 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.
  • it is conducive to reducing the gap at the connection between two adjacent cascade tubes when they are connected, thereby increasing the stability of the connection, improving the connection accuracy and reducing errors.
  • 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, one end of the connecting ring 14 is protruding along its axial direction with the connecting teeth 15, and a plurality of the connecting teeth 15 are evenly spaced along the circumferential square 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; the fixed tube 13 is provided with a tooth groove 16 matching the connecting tooth 15 at one end 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.
  • the connecting teeth 15 and the tooth grooves 16 are arranged in a one-to-one correspondence.
  • the connecting teeth 15 and the tooth grooves 16 are meshed one by one.
  • the connecting protrusion 11 on the connecting ring 14 is first aligned with the opening of the connecting groove 21 on the butt joint pipe 2, and then the connecting ring 14 is first moved to the inside of the butt joint pipe 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 pipe 2.
  • the connecting ring 14 is connected to the fixed pipe 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 rotation virtual position inside the connecting device,
  • the connecting ring 14 is provided.
  • 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.
  • the connecting teeth 15 are connected to the tooth grooves 16 to fix the connecting ring 14 on the fixing 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.
  • 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
  • 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
  • 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.
  • 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
  • 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.
  • 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°
  • 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°.
  • the arrangement of the tip 151, the middle portion 152 and the root 153 facilitates the quick 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 helps to enhance the connection between the connecting ring 14 and the fixing tube 13.
  • 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 butt joint pipe 2 and the opening of the first slide groove 211 passes through the end of the butt joint pipe 2; the end of the first slide groove 211 away from the end of the butt joint pipe 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 pipe 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 to the first slide groove 211.
  • one 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 be smoothly inserted from the opening of the first slide groove 211.
  • the connection between the second slide groove 212 and the first slide groove 211 is provided with an arc structure, and the width of the second slide groove 212 is greater than the length of the connecting protrusion 11, so that the connecting ring 14 can be rotated when it is located at the deepest part of the first slide groove 211, so that the connecting protrusion 11 can be twisted toward the direction of 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 is matched with 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 in parallel with the two waistlines of the connecting protrusion 11, so that the connecting protrusion 11 can be moved to the third slide groove 213 for fixed connection.
  • 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 beneficial to enhance the fixing effect.
  • the connecting groove 21 further includes a limiting groove 214 which is colinear with the third sliding groove 213 , and the limiting groove 214 is disposed at one end of the third sliding groove 213 close to the second sliding groove 212 .
  • the setting of the limiting groove 214 is helpful to prevent the connecting protrusion 11 from falling off from the connecting groove 21, and further helps to prevent the connecting pipe 1 from falling off from the butt pipe 2.
  • the inner wall of the cascade pipe 6 away from the connecting pipe 1 is provided with a thread groove
  • the outer wall of one end of the butt pipe 2 is provided with a connecting thread 24 matching the thread groove, and the butt pipe 2 is threadedly connected to the cascade pipe 6.
  • the butt joint pipe 2 is threadedly connected to one 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 to increase the convenience of the user during installation or disassembly.
  • the connecting device also includes an auxiliary spring 5, and the inner wall of the cascade tube 6 at one end away from the connecting tube 1 is also provided with a spring groove 50, and the spring groove 50 is connected with the thread groove, and 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.
  • 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.
  • the auxiliary spring 5 is squeezed to apply a force to the butt joint pipe 2 in a direction close to the connecting pipe 1, which helps to avoid axial virtual position after the butt joint pipe 2 and the cascade pipe 6 are tightened.
  • the outer wall of the connecting tube 1 has a plurality of connecting bead grooves 12 evenly spaced along its circumferential direction, 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.
  • the number of the positioning beads 4 is consistent with the number of the connecting bead grooves 12 .
  • 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 to enhance the stability of the secondary connection.
  • connection 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 bead hole 22 , and the outer diameter of the limiting ring 23 is greater than the inner diameter of the sleeve 3 .
  • the setting of the stop ring 23 is helpful to prevent the sleeve 3 from being detached from the butt pipe 2.
  • the present invention also provides a surgical navigation system, including a cascade tube 6 and a connecting device as described above, wherein the cascade tube 6 includes a straight tube 61, a first curved tube 62 and a second curved tube 63, wherein 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.
  • the senor is used to obtain the position of the cascade tube 6 and calculate and locate the operating device, and the precise position of the operating device is represented by coordinates, so as to perform distance measurement, level measurement and orientation determination during surgery, thereby improving the accuracy of the surgical navigation system during use and improving the safety of the surgery.

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Abstract

一种连接装置及手术导航系统，连接装置用于连接手术导航系统的相邻的两个级联管（6），连接装置包括：连接管（1）、对接管（2）、套管（3）和定位珠（4），连接管（1）和对接管（2）用于分别设置于级联管（6）的两端；其中一个级联管（6）上的对接管（2）用于套接于另一个级联管（6）上的连接管（1）的外壁；连接管（1）上设置有连接凸起（11）；对接管（2）的内壁设置有与对接管（2）的内部相连通的连接槽（21）；其中，双重固定连接一方面有利于调节级联管（6）的长度，使得用户可根据实际情况来调节手术导航系统中的级联管（6）的长度，另一方面有利于减小相邻两个级联管（6）在连接时连接处的间隙，以此增加连接的稳定性，提高连接精度，减小误差。

Description

一种连接装置及手术导航系统 技术领域
本发明涉及医疗器械技术领域，具体而言，涉及一种连接装置及手术导航系统。
 背景技术
随着数字化技术的普及，口腔手术通常通过专用器械伸入患者口腔，以进行精细的手术操作，由于口腔空间比较有限，故在器械伸入口腔后，无法准确获得器械的位置，导致增加手术风险，术后效果变差。
 技术问题
目前，通常采用机械导航装置来获取位置信息，机械导航装置上的级联管是否合 适关系到整个导航的精确度。现有技术中，手术导航系统中的级联管的长度通常不可调节，当患者颊部肌肉发达或者脂肪较多时，由口内伸出的长度不能满足临床需要，即使固位后，会因颊部肌肉或脂肪厚度的影响，使其术中松动，产生误差，以此造成严重的影响。
 技术解决方案
本发明旨在解决现有手术导航系统中的级联管的长度不可调节的问题。
为解决上述问题，本发明提出如下技术方案：
一种连接装置，用于连接手术导航系统的相邻的两个级联管，所述连接装置包括：连接管、对接管、套管和定位珠，所述连接管和所述对接管用于分别设置于所述级联管的两 端；其中一个所述级联管上的所述对接管用于套接于另一个所述级联管上的所述连接管外；
所述连接管上设置有连接凸起；所述对接管的内壁设置有与所述对接管的内部相连通的连接槽，所述连接槽的开口朝向远离所述级联管的一端设置且所述连接槽与所述连接凸起相匹配；当所述对接管套接于所述连接管外时，所述连接凸起用于从所述连接槽的开口移动至所述连接槽内；
所述连接管的外壁设置有与所述定位珠相匹配的连接珠槽；所述对接管的侧壁贯穿设置有与所述定位珠相匹配的对接珠孔；当所述对接管套接于所述连接管外时，所述对接珠孔用于与所述连接珠槽相对齐以形成定位珠槽；
所述套管的内壁沿其周向方向设置有环槽，多个所述定位珠活动设置于所述环槽内，当所述对接管套接于所述连接管外后，所述套管用于套接于所述对接管外，以使所述定位珠卡接于所述定位珠槽内。
 有益效果
本发明提供的一种连接装置，相较于现有技术，具有但不局限于以下有益效果：
当在手术导航系统中的级联管的较短时，可增加级联管的数量并通过连接装置来连接相邻的两个级联管；在安装时，首先将一个级联管上的对接管套接于另一个级联管上的连接管的外壁，并使得连接管上的连接凸起从对接管的内壁的连接槽的开口移动至连接槽内，以实现初步固定连接，并使得对接珠孔与连接珠槽相对齐以形成定位珠槽；之后，将原本套接在对接管上的远离对接珠孔的套管移动至对接管上正对定位珠槽的位置处，以使得套管内的环槽与定位珠槽相对齐；然后，转动套管，套管在转动的过程中带动定位珠在环槽内移动并且使得定位珠移动至定位珠槽内，进而实现二次固定连接，连接珠槽和对接珠 孔用于容纳定位珠并限制定位珠位置，保证定位珠始终处于较为理想的位置；其中，通过连 接凸起与连接槽之间相互配合，实现初步固定连接，通过套管、定位珠和定位珠槽之间相互 配合，实现二次固定连接，以防止连接管和对接管之间发生相对转动，双重固定连接一方面 有利于调节级联管的长度，使得用户可根据实际情况来调节手术导航系统中的级联管的长 度，另一方面有利于减小相邻两个级联管在连接时连接处的间隙，以此增加连接的稳定性，提高连接精度，减小误差。
优选地，所述连接管包括固定管、连接环和连接齿，所述连接凸起设置于所述连接环的外壁，所述连接环的一端沿其轴向方向凸出设置有所述连接齿，多个所述连接齿沿所述连接环的周向方形均匀间隔设置；
所述固定管用于与所述级联管固定连接，所述连接珠槽设置于所述固定管的外壁；所述固定管朝向所述对接管的一端设置有与所述连接齿相匹配的齿槽，所述连接齿用于插接于所述齿槽内并采用冷焊接连接。
优选地，所述连接齿包括尖部、中部和根部，所述根部固定于所述连接环的端部，所述中部用于连接于所述尖部与所述根部之间，所述尖部的截面为三角形结构，所述中部 的截面为等腰梯形结构，所述根部的截面为矩形结构，所述中部的截面的较长底边的一端 与所述根部相连接，所述中部的截面的较短底边的一端与所述尖部相连接；所述根部的宽 度与所述齿槽的宽度相匹配。
优选地，所述连接槽包括第一滑槽、第二滑槽和第三滑槽，所述第一滑槽沿所述对接管的轴向方向设置且所述第一滑槽的开口贯穿所述对接管的端部；所述第一滑槽远离所述对接管的端部的一端连接有与所述第一滑槽相垂直的所述第二滑槽；所述第三滑槽沿所述对接管的轴向方向设置，所述第三滑槽连接于所述第二滑槽远离所述第一滑槽的一端并与所述第一滑槽反向设置。
优选地，所述连接槽还包括与所述第三滑槽共线的限位槽，所述限位槽设置于所述第三滑槽靠近所述第二滑槽的一端。
优选地，所述级联管远离所述连接管的一端的内壁设置有螺纹槽，所述对接管的 一端外壁设置有与所述螺纹槽相匹配的连接螺纹，所述对接管螺纹连接于所述级联管内。
优选地，所述连接装置还包括辅助弹簧，所述级联管远离所述连接管的一端的内 壁还设置有弹簧槽，所述弹簧槽与所述螺纹槽相连通，所述辅助弹簧安装进所述弹簧槽内，所述辅助弹簧的一端抵接于所述弹簧槽的内壁，另一端抵接于所述对接管的端部。
优选地，所述连接管的外壁沿其周向方向均匀间隔分布多个所述连接珠槽，所述连接珠槽设置有多排，相邻两排的所述连接珠槽交错分布；所述对接珠孔与所述连接珠槽相适配。
优选地，所述连接装置还包括限位环，所述对接管靠近所述对接珠孔的一端外壁固定有所述限位环，所述限位环的外径大于所述套管的内径。
本发明还提供一种手术导航系统，包括级联管以及如上述所述的连接装置，所述级联管包括直管、第一弯管和第二弯管，所述第一弯管和所述第二弯管分别固定连接于所述直管的两端，所述连接装置的连接管与所述第一弯管固定连接，所述连接装置的对接管与所述第二弯管螺纹连接。
所述手术导航系统相对于现有技术所具有的有益效果与所述连接装置一致，在此不再赘述。
 附图说明
图1为本发明实施例的连接装置的整体结构示意图；
图2为本发明实施例的图1中A处的局部放大结构示意图；
图3为本发明实施例的对接管的剖面结构示意图；
图4为本发明实施例的连接装置的整体剖面结构示意图；
图5为本发明实施例的手术导航系统的级联管的结构示意图。
附图标记说明：
1连接管、11连接凸起、12连接珠槽、13固定管、14连接环、15连接齿、151尖部、152中部、153根部、16齿槽、2对接管、21连接槽、211第一滑槽、212第二滑槽、213第三滑槽、214限位槽、22对接珠孔、23限位环、24连接螺纹、3套管、30环槽、4定位珠、5辅助弹簧、50弹簧槽、6级联管、61直管、62第一弯管、63第二弯管、64旋转轴承。
 本发明的实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例用于说明本申请，但不能用来限制本申请的范围。
在本发明的描述中，需要理解的是，术语“上”、“下”、“前”、“后”、“左”、“右”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描 述，而不是指示或暗示所指的组件或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
需要说明的是，本文提供的坐标系XYZ中，X轴正向代表右方，X轴的反向代表左方，Y轴的正向代表前方，Y轴的反向代表后方，Z轴的正向代表上方，Z轴的反向代表下方；Z轴、X 轴、Y轴表示含义仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的组件或元 件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
参阅图1‑图5，本发明提供的一种连接装置，用于连接手术导航系统的相邻的两个级联管6，所述连接装置包括：连接管1、对接管2、套管3和定位珠4，所述连接管1和所述对接管2用于分别设置于所述级联管6的两端；其中一个所述级联管6上的所述对接管2用于套接于另一个所述级联管6上的所述连接管1外。
参阅图2‑图3，所述连接管1上设置有连接凸起11；所述对接管2的内壁设置有与所述对接管2的内部相连通的连接槽21，所述连接槽21的开口朝向远离所述级联管6的一端设置且所述连接槽21与所述连接凸起11相匹配；当所述对接管2套接于所述连接管1外时，所述连接凸起11用于从所述连接槽21的开口移动至所述连接槽21内。
参阅图4，所述连接管1的外壁设置有与所述定位珠4相匹配的连接珠槽12；所述对接管2的侧壁贯穿设置有与所述定位珠4相匹配的对接珠孔22；当所述对接管2套接于所述连接管1外时，所述对接珠孔22用于与所述连接珠槽12相对齐以形成定位珠槽。
参阅图4，所述套管3的内壁沿其周向方向设置有环槽30，多个所述定位珠4活动设置于所述环槽30内，当所述对接管2套接于所述连接管1外后，所述套管3用于套接于所述对接管2外，以使所述定位珠4卡接于所述定位珠槽内。
在本实施例中，当在手术导航系统中的级联管6的较短时，可增加所述级联管6的 数量并通过所述连接装置来连接相邻的两个所述级联管6；在安装时，首先将一个所述级联 管6上的所述对接管2套接于另一个所述级联管6上的所述连接管1的外壁，并使得所述连接 管1上的所述连接凸起11从所述对接管2的内壁的所述连接槽21的开口移动至所述连接槽 21内，以实现初步固定连接，并使得所述对接珠孔22与所述连接珠槽12相对齐以形成所述 定位珠槽；之后，将原本套接在所述对接管2上的远离所述对接珠孔22的所述套管3移动至 所述对接管2上正对所述定位珠槽的位置处，以使得所述套管3内的所述环槽30与所述定位 珠槽相对齐；然后，转动所述套管3，所述套管3在转动的过程中带动所述定位珠4在所述环 槽30内移动并且使得所述定位珠4移动至所述定位珠槽内，进而实现二次固定连接，所述连 接珠槽12和所述对接珠孔22用于容纳所述定位珠4并限制所述定位珠4位置，保证所述定位 珠4始终处于理想位置；其中，通过所述连接凸起11与所述连接槽21之间相互配合，实现初 步固定连接，通过所述套管3、所述定位珠4和所述定位珠槽之间相互配合，实现二次固定连 接，以防止所述连接管1和所述对接管2之间发生相对转动，双重固定连接一方面有利于调节所述级联管的长度，使得用户可根据实际情况来调节手术导航系统中的级联管的长度，另一方面有利于减小相邻两个级联管在连接时连接处的间隙，以此增加连接的稳定性，提 高连接精度，减小误差。
参阅图1-图2，优选地，所述连接管1包括固定管13、连接环14和连接齿15，所述连接凸起11设置于所述连接环14的外壁，所述连接环14的一端沿其轴向方向凸出设置有所述连接齿15，多个所述连接齿15沿所述连接环14的周向方形均匀间隔设置。
所述固定管13用于与所述级联管6固定连接，所述连接珠槽12设置于所述固定管 13的外壁；所述固定管13朝向所述对接管2的一端设置有与所述连接齿15相匹配的齿槽16，所述连接齿15用于插接于所述齿槽16内并采用冷焊接连接。
具体地，所述连接齿15与所述齿槽16一一对应设置，在所述连接装置按预设位置连接时，所述连接齿15与所述齿槽16一一啮合。
在本实施例中，在安装时，先将所述连接环14上的所述连接凸起11与所述对接管2上的连接槽21的开口相对齐，再将所述连接环14先移动至所述对接管2的内部，并使得所述连接凸起11移动至所述连接槽21内，防止所述连接环14在所述对接管2内转动，之后，将所述连接环14与所述固定管13相连接，即将所述连接环14上的所述连接齿15插接进所述齿槽16内并采用冷焊接连接；其中，所述连接凸起11和所述连接槽21的设置有利于防止所述连接装置内部产生转动虚位，在实际使用时，所述连接凸起11若是直接设置在所述固定管13上，则在安装时未必能保证与所述连接槽21相对齐，故设置所述连接环14，在安装时可先转动所述连接环14使得所述连接凸起11先与所述连接槽21对齐并将所述连接环14安装进所述对接管2内，然后将所述连接齿15与所述齿槽16相连接以将所述连接环14固定于所述固定管13上，该结构有利于调整所述连接凸起11的周向位置，以使得所述连接凸起11能够与所述连接槽21的所述开口相对齐，以提高安装的便捷性。
参阅图2，优选地，所述连接齿15包括尖部151、中部152和根部153，所述根部153固定于所述连接环14的端部，所述中部152用于连接于所述尖部151与所述根部153之间，所述尖部151的截面为三角形结构，所述中部152的截面为等腰梯形结构，所述根部153的截面为矩形结构，所述中部152的截面的较长底边的一端与所述根部153相连接，所述中部152的截面的较短底边的一端与所述尖部151相连接；所述根部153的宽度与所述齿槽16的宽度相匹配。
具体地，所述尖部151为等腰三角形，所述中部152的截面的一端的底边边长与所述尖部151的三角形的底边边长一致，所述中部152的截面的另一端的底边边长与所述根部153的宽度一致，所述连接齿15插接进所述齿槽16内时，所述根部153用于提供与所述齿槽16的摩擦力，以使所述连接齿15与所述齿槽16相互啮合。
其中，所述连接齿15的所述尖部151的截面的腰线与所述连接环14的轴线所成的锐角为40°，所述中部152的截面的腰线与所述连接环14的轴线所成的锐角  为8°，该结构有利于所述连接齿15快速插接进所述齿槽16内。
在本实施例中，所述尖部151、所述中部152和所述根部153的设置有利于所述连接齿15快速插接进所述齿槽16内，通过所述根部153维持与所述齿槽16的摩擦，加之冷焊接效果，有利于增强所述连接环14与所述固定管13之间的连接。
参阅图3，优选地，所述连接槽21包括第一滑槽211、第二滑槽212和第三滑槽213，所述第一滑槽211沿所述对接管2的轴向方向设置且所述第一滑槽211的开口贯穿所述对接 管2的端部；所述第一滑槽211远离所述对接管2的端部的一端连接有与所述第一滑槽211相垂直的所述第二滑槽212；所述第三滑槽213沿所述对接管2的轴向方向设置，所述第三滑槽 213连接于所述第二滑槽212远离所述第一滑槽211的一端并与所述第一滑槽211反向设置。
具体地，所述连接凸起11远离所述固定管13的一端为第一端，另一端为第二端，所 述第一端的截面宽度小于所述第二端的截面宽度；所述第一滑槽211的宽度大于所述连接 凸起11的所述第二端的截面宽度，便于所述连接凸起11能顺利从所述第一滑槽211的开口 进入到所述连接槽21内；所述第二滑槽212与所述第一滑槽211的连接处设置有圆弧结构，且所述第二滑槽212的宽度大于所述连接凸起11的长度，便于在所述连接环14位于第一滑槽211最深处时转动，以使所述连接凸起11朝向所述第二滑槽212的方向拧动；所述第三滑 槽213靠近所述第二滑槽212一端的宽度大于所述连接凸起11的所述第二端的截面宽度，所 述第三滑槽213远离所述第二滑槽212一端的宽度与所述连接凸起11的所述第一端的截面宽度相匹配，且所述第三滑槽213的两个腰线分别与所述连接凸起11的两个腰线平行设置，以便于所述连接凸起11移动至所述第三滑槽213处实现固定卡接。
在本实施例中，所述连接凸起11、所述第一滑槽211、所述第二滑槽212和所述第三滑槽213之间相互配合，使得所述连接环14在插接进所述对接管2内时通过移动和转动实现与所述对接管2的初步固定，有利于加强固定效果。
参阅图3，优选地，所述连接槽21还包括与所述第三滑槽213共线的限位槽214，所述限位槽214设置于所述第三滑槽213靠近所述第二滑槽212的一端。
在本实施例中，所述限位槽214的设置有利于防止所述连接凸起11从所述连接槽 21中脱落，进而有利于防止所述连接管1从所述对接管2中脱落。
参阅图3，优选地，所述级联管6远离所述连接管1的一端的内壁设置有螺纹槽，所述对接管2的一端外壁设置有与所述螺纹槽相匹配的连接螺纹24，所述对接管2螺纹连接于所述级联管6内。
在本实施例中，所述对接管2螺纹连接在所述级联管6上远离所述连接管1的一端，该结构使得所述对接管2可拆卸安装在所述级联管6上，以增加用户在安装或拆卸时的便利性。
参阅图4，优选地，所述连接装置还包括辅助弹簧5，所述级联管6远离所述连接管1的一端的内壁还设置有弹簧槽50，所述弹簧槽50与所述螺纹槽相连通，所述辅助弹簧5安装进所述弹簧槽50内，所述辅助弹簧5的一端抵接于所述弹簧槽50的内壁，另一端抵接于所述对接管2的端部。
具体地，所述辅助弹簧5的一端还可套接于所述对接管2的外部并与所述对接管2 的外部固定连接，所述辅助弹簧5的另一端抵接于所述弹簧槽50的内壁，以使所述辅助弹簧5连接于所述对接管2与所述弹簧槽50的内壁之间。
在本实施例中，在拧紧连接螺纹24后，所述辅助弹簧5受到挤压以对所述对接管2施加靠近所述连接管1方向的力，有利于避免所述对接管2与所述级联管6拧紧后产生轴向的虚位。
参阅图1，优选地，所述连接管1的外壁沿其周向方向均匀间隔分布多个所述连接珠槽12，所述连接珠槽12设置有多排，相邻两排的所述连接珠槽12交错分布；所述对接珠孔22与所述连接珠槽12相适配。
具体地，所述定位珠4的数量与所述连接珠槽12的数量一致。
在本实施例中，相邻两排的所述连接珠槽12交错分布则相邻两排的所述定位珠槽也交错分布，所述定位珠4卡接进交错分布的所述定位珠槽内有利于加强二次连接的稳定性。
参阅图3-图4，优选地，所述连接装置还包括限位环23，所述对接管2靠近所述对接珠孔22的一端外壁固定有所述限位环23，所述限位环23的外径大于所述套管3的内径。
在本实施例中，所述限位环23的设置有利于防止所述套管3从所述对接管2上脱
落。
参阅图5，本发明还提供一种手术导航系统，包括级联管6以及如上述所述的连接装置，所述级联管6包括直管61、第一弯管62和第二弯管63，所述第一弯管62和所述第二弯管63分别固定连接于所述直管61的两端，所述连接装置的连接管1与所述第一弯管62固定连接，所述连接装置的对接管2与所述第二弯管63螺纹连接。
所述手术导航系统相对于现有技术所具有的有益效果与所述连接装置一致，在此不再赘述。
参阅图5，所述手术导航系统还包括旋转轴承64、传感器和操作装置，所述旋转轴承64设置于所述第二弯管63以及所述直管61上，以使得所述级联管6能够根据实际需求进行转动，保证导航位置的准确；所述操作装置设置于所述手术导航系统中最末的所述级联管6的尾端，所述操作装置用于伸入口腔内部并对口腔进行手术。
在本实施例中，所述传感器用于获得所述级联管6的位置以及计算和定位所述操 作装置，并通过坐标表示所述操作装置的精确位置，以此进行手术中距离测量、水准测量及方位确定，便于提高所述手术导航系统在使用中的精度，提高手术安全性。
虽然本发明披露如上，但本发明的保护范围并非仅限于此。本领域技术人员在不脱离本发明的精神和范围的前提下，可进行各种变更与修改，这些变更与修改均将落入本发明的保护范围。

Claims (10)

  1. 一种连接装置，用于连接手术导航系统的相邻的两个级联管（6），其特征在于，所述连接装置包括：连接管（1）、对接管（2）、套管（3）和定位珠（4），所述连接管（1）和所述对接管（2）用于分别设置于所述级联管（6）的两端；其中一个所述级联管（6）上的所述对接管（2）用于套接于另一个所述级联管（6）上的所述连接管（1）外；
    所述连接管（1）上设置有连接凸起（11）；所述对接管（2）的内壁设置有与所述对接管（2）的内部相连通的连接槽（21），所述连接槽（21）的开口朝向远离所述级联管（6）的一端设置且所述连接槽（21）与所述连接凸起（11）相匹配；当所述对接管（2）套接于所述连接管（1）外时，所述连接凸起（11）用于从所述连接槽（21）的开口移动至所述连接槽（21）内；
    所述连接管（1）的外壁设置有与所述定位珠（4）相匹配的连接珠槽（12）；所述对接管（2）的侧壁贯穿设置有与所述定位珠（4）相匹配的对接珠孔（22）；当所述对接管（2）套接于所述连接管（1）外时，所述对接珠孔（22）用于与所述连接珠槽（12）相对齐以形成定位珠槽；
    所述套管（3）的内壁沿其周向方向设置有环槽（30），多个所述定位珠（4）活动设置于所述环槽（30）内，当所述对接管（2）套接于所述连接管（1）外后，所述套管（3）用于套接于所述对接管（2）外，以使所述定位珠（4）卡接于所述定位珠槽内。
  2. 根据权利要求1所述的连接装置，其特征在于，所述连接管（1）包括固定管（13）、连接环（14）和连接齿（15），所述连接凸起（11）设置于所述连接环（14）的外壁，所述连接环（14）的一端沿其轴向方向凸出设置有所述连接齿（15），多个所述连接齿（15）沿所述连接环（14）的周向方形均匀间隔设置；
    所述固定管（13）用于与所述级联管（6）固定连接，所述连接珠槽（12）设置于所述固定管（13）的外壁；所述固定管（13）朝向所述对接管（2）的一端设置有与所述连接齿（15）相匹配的齿槽（16），所述连接齿（15）用于插接于所述齿槽（16）内并采用冷焊接连接。
  3. 根据权利要求2所述的连接装置，其特征在于，所述连接齿（15）包括尖部（151）、中部（152）和根部（153），所述根部（153）固定于所述连接环（14）的端部，所述中部（152）用于连接于所述尖部（151）与所述根部（153）之间，所述尖部（151）的截面为三角形结构，所述中部（152）的截面为等腰梯形结构，所述根部（153）的截面为矩形结构，所述中部（152）的截面的较长底边的一端与所述根部（153）相连接，所述中部（152）的截面的较短底边的一端与所述尖部（151）相连接；所述根部（153）的宽度与所述齿槽（16）的宽度相匹配。
  4. 根据权利要求1所述的连接装置，其特征在于，所述连接槽（21）包括第一滑槽（211）、第二滑槽（212）和第三滑槽（213），所述第一滑槽（211）沿所述对接管（2）的轴向方向设置且 所述第一滑槽（211）的开口贯穿所述对接管（2）的端部；所述第一滑槽（211）远离所述对接 管（2）的端部的一端连接有与所述第一滑槽（211）相垂直的所述第二滑槽（212）；所述第三 滑槽（213）沿所述对接管（2）的轴向方向设置，所述第三滑槽（213）连接于所述第二滑槽 （212）远离所述第一滑槽（211）的一端并与所述第一滑槽（211）反向设置。
  5. 根据权利要求4所述的连接装置，其特征在于，所述连接槽（21）还包括与所述第三滑槽（213）共线的限位槽（214），所述限位槽（214）设置于所述第三滑槽（213）靠近所述第二滑槽（212）的一端。
  6. 根据权利要求1所述的连接装置，其特征在于，所述级联管（6）远离所述连接管（1）的一端的内壁设置有螺纹槽，所述对接管（2）的一端外壁设置有与所述螺纹槽相匹配的连接螺纹（24），所述对接管（2）螺纹连接于所述级联管（6）内。
  7. 根据权利要求6所述的连接装置，其特征在于，还包括辅助弹簧（5），所述级联管（6）远离所述连接管（1）的一端的内壁还设置有弹簧槽（50），所述弹簧槽（50）与所述螺纹槽相连通，所述辅助弹簧（5）安装进所述弹簧槽（50）内，所述辅助弹簧（5）的一端抵接于所述弹簧槽（50）的内壁，另一端抵接于所述对接管（2）的端部。
  8. 根据权利要求1所述的连接装置，其特征在于，所述连接管（1）的外壁沿其周向方向均匀间隔分布多个所述连接珠槽（12），所述连接珠槽（12）设置有多排，相邻两排的所述连接珠槽（12）交错分布；所述对接珠孔（22）与所述连接珠槽（12）相适配。
  9. 根据权利要求1所述的连接装置，其特征在于，还包括限位环（23），所述对接管（2）靠近所述对接珠孔（22）的一端外壁固定有所述限位环（23），所述限位环（23）的外径大于所述套管（3）的内径。
  10. 一种手术导航系统，其特征在于，包括级联管（6）以及如权利要求1-9任一项所述的连接装置，所述级联管（6）包括直管（61）、第一弯管（62）和第二弯管（63），所述第一弯管（62）和所述第二弯管（63）分别固定连接于所述直管（61）的两端，所述连接装置的连接管（1）与所述第一弯管（62）固定连接，所述连接装置的对接管（2）与所述第二弯管（63）螺纹连接。
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