Reset device

Abstract

The present invention discloses a reduction device, which comprises a main body; a navigation system disposed on the main body for navigation during the use of the reduction device; and an insertion part disposed at one end of the main body. The reduction device of the present invention has a navigation function and is easy to operate, can monitor and evaluate acetabular adjustment in real time, reduces the dependence on the personal experience of doctors for periacetabular osteotomy, reduces the time used in the surgical process, and improves the reliability of acetabular adjustment.

Description

Technical Field

[0001] The present invention relates to the field of reducers, and particularly to a reducer for periacetabular osteotomy. Background Art

[0002] Periacetabular osteotomy is specifically for patients with hip dysplasia. For young or less severely diseased patients, early detection and timely treatment can change the acetabular orientation, effectively increasing the acetabular containment and coverage of the femur. After the acetabulum is transected along the ischium, pubis, ilium, and posterior column using a straight osteotome and a curved osteotome, the acetabulum needs to be adjusted at a certain angle to bring the acetabular containment and coverage rate with the femur to the normal level. In the acetabular adjustment stage of traditional periacetabular osteotomy, it depends on the doctor's personal osteotomy experience. After inserting a Schanz pin under the acetabular spine, using the Schanz pin as a medium, the Schanz pin is twisted or pushed and pulled at a certain angle to drive the pose of the acetabulum for adjustment. The angle of this twist or push-pull needs to be evaluated based on the doctor's personal experience, resulting in a longer operation time and lower reliability of acetabular adjustment. Therefore, there is a market demand for a reducer with a navigation function to enable real-time monitoring and evaluation of acetabular adjustment, which is easy to operate and reliable. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a reducer that is easy to operate and reliable for real-time monitoring and evaluation of acetabular adjustment.

[0004] The present invention solves the above technical problem through the following technical solutions:

[0005] A reducer includes: a main body; a navigation system disposed on the main body for navigation during the use of the reducer; and an insertion part disposed at one end of the main body.

[0006] In this solution, the navigation system, the insertion part, and the handle can all be fixed to the main body through a pin rod. The main body is approximately cylindrical and is the base for carrying other parts of the reducer; the navigation system is disposed on the main body to enable real-time monitoring and evaluation of the position and angle adjustment of the acetabulum during the use of the reducer; the insertion part is disposed at one end of the main body and is used to insert into the acetabulum to synchronously transmit the twisting or pushing and pulling movement on the reducer to the acetabulum.

[0007] Preferably, the insertion part includes a nail part and a rod part, and the nail part and the rod part are connected through a connecting mechanism. The connecting mechanism includes a connecting rod and a receiving hole for inserting the connecting rod. One of the connecting rod and the receiving hole is disposed on the nail part, and the other is disposed on the rod part. The outer side of the connecting rod in the radial direction has a first limiting surface, and the inner wall of the receiving hole has a second limiting surface matching the first limiting surface, so that when the receiving hole rotates around its own axis, it can drive the connecting rod to rotate.

[0008] In this solution, the nail is inserted into the acetabulum; the rod is a connecting piece that connects the nail and the main body; the nail and the rod are connected through the connecting rod and the receiving hole for the connecting rod to be inserted, so that the nail and the rod are engaged with each other; the first limiting surface and the second limiting surface cooperate with each other, so that the receiving hole can rotate around its own axis and drive the connecting rod to rotate, while also preventing either the nail or the rod from idling and failing to accurately synchronize the doctor's twisting of the reducer. This setting prevents the above factors that may occur during the operation, and helps the smoothness and reliability of the operation.

[0009] Furthermore, a locking sleeve is rotatably sleeved on the outer side of the rod portion, the inner wall of the locking sleeve can be threadedly connected to the outer wall of the nail portion, and the locking sleeve can move axially relative to the rod portion between a first position close to the nail portion and a second position away from the nail portion.

[0010] In this solution, the locking sleeve is used to lock the connecting rod and the receiving hole on the nail part and the rod part, and the inner wall of the locking sleeve is threadedly connected and matched with the outer wall of the nail part. Therefore, the locking sleeve can move axially relative to the rod part between a first position close to the nail part and a second position away from the nail part on the outside of the rod part. Specifically, when the locking sleeve is threadedly connected to the nail part, the locking sleeve can be moved axially by rotating the locking sleeve. This movement specifically controls the tightness of the connection between the nail part and the rod part. In the first position, the nail part and the rod part are tightly engaged with each other, while in the second position, the nail part and the rod part can be separated. This arrangement allows the rod part and the main body to which it is connected to be separated from the nail part when necessary, and timely reconnected to other nail parts to make adjustments, thereby improving the operability of the operation.

[0011] Furthermore, the rod portion has a first step portion protruding radially outward, and the locking sleeve has a second step portion protruding radially inward. When the locking sleeve is located at the first position, the second step portion abuts against a side of the first step portion away from the nail portion.

[0012] In this solution, the first step portion constitutes a limiting structure for the locking sleeve, and the locking sleeve has a second step portion that matches the first step portion, and the first step portion and the second step portion abut against each other when the locking sleeve is in the first position. Therefore, the movement space of the locking sleeve is limited to the side of the first step portion close to the main body, and when the locking sleeve is in the second position to separate the nail portion and the rod portion, the locking sleeve will not fall out from the direction where the nail portion is located to interfere with the surgical process, thereby ensuring the reliability of the acetabulum adjustment process.

[0013] Furthermore, a receiving cavity is provided on a side of the locking sleeve facing the main body, and when the locking sleeve is located at the second position, the main body can be partially inserted into the receiving cavity.

[0014] In this solution, through this accommodating cavity, when the locking sleeve is in the second position, part of the locking sleeve overlaps outside the body, that is, the main body can be partially inserted into the accommodating cavity. This accommodating cavity provides a larger operating space for the movement of the locking sleeve, so that it is possible to clearly and visually distinguish whether the locking sleeve is specifically in the first position or the second position in terms of position and space, without the need for additional manual touch confirmation, which provides convenience for the doctor's operation and further optimizes the time used in the surgical process.

[0015] Furthermore, both the receiving hole and the connecting rod have a square cross-section, and rounded corners are provided at the four corners.

[0016] In this solution, the receiving hole and the connecting rod are set to have a square cross-section, so that each constitutes four first or second limiting surfaces to achieve transmission, preventing any one of the nail part or the rod part from idling and unable to accurately synchronously reflect the doctor's torsion of the repositioner. Rounded corners are provided at the four corners of the square, thus preventing the four corners from deforming due to wear or collision and affecting the engagement between the receiving hole and the connecting rod, resulting in the two not being engaged in place. At the same time, the rounded corners reduce the processing difficulty. Therefore, this setting improves the reliability and processability of the repositioner during operation.

[0017] Preferably, the first end and the second end of the main body are opposite ends, the navigation system is connected between the first end and the second end of the main body, the insertion part is arranged at the first end, and a handle is arranged at the second end.

[0018] In this solution, the handle is used for convenient holding, so that it is easier for the doctor to make torsional or push-pull adjustments. The navigation system is connected between the first end and the second end of the main body, preventing the navigation system from interfering with the insertion part and / or the handle in space, and improving the reliability of the repositioner operation.

[0019] Preferably, the main body is provided with an installation groove, and part of the navigation system is embedded in the installation groove; the main body is provided with a first flat surface part, the installation groove is arranged on the first flat surface part, the navigation system is provided with a second flat surface part, a convex part is arranged on the second flat surface part, the first flat surface part cooperates with the second flat surface part, and the convex part is inserted into the installation groove in a matching manner.

[0020] In this solution, the navigation system is partially embedded in the installation groove on the main body, making the connection between the two more stable and reliable. The main body is provided with a first flat portion to form a stable section plane, and an installation groove is further provided on this stable section plane. A protruding portion corresponding in position and shape to the installation groove is further provided on the second flat portion of the navigation system. Thus, the second flat portion of the navigation system can be parallel to the main body by only fitting with the first flat portion and inserting the protruding portion into the installation groove. And when the nail portion is parallel to the main body, it can also be regarded as the navigation device being parallel to the nail portion. In this setting, the mutually parallel navigation system and nail portion enable the programming algorithm in the navigation system not to consider the angle factor, achieving streamlining of the algorithm, making the response of the navigation device faster, and further reducing the time used in the surgical process.

[0021] Preferably, the navigation system includes a reference frame and a navigation device. The reference frame is inclined in a direction away from the insertion portion, and the navigation device is provided at one end of the reference frame away from the main body.

[0022] In this solution, the reference frame is inclined in a direction away from the insertion portion, thereby further preventing the navigation device from interfering with the insertion portion in terms of spatial position and improving the reliability of the operation of the repositioner.

[0023] Furthermore, the navigation device is an NDI device. A three-claw-shaped installation portion is provided on the reference frame, and the navigation device is connected to the reference frame through the three-claw-shaped installation portion.

[0024] On the basis of conforming to the common knowledge in the art, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0025] The positive and progressive effects of the present invention are as follows: The repositioner of the present invention has a navigation function and is easy to operate, can monitor and evaluate acetabular adjustment in real time, reduces the dependence on the personal experience of doctors in periacetabular osteotomy, reduces the time used in the surgical process, and improves the reliability of acetabular adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a perspective view of the repositioner according to an embodiment of the present invention;

[0027] Figure 2 is a sectional view of the repositioner according to an embodiment of the present invention;

[0028] Figure 3 is a perspective view of the nail portion of the repositioner according to an embodiment of the present invention;

[0029] Figure 4 is a perspective view of the rod portion of the repositioner according to an embodiment of the present invention;

[0030] Figure 5Stereogram of the locking sleeve of the resettor according to an embodiment of the present invention;

[0031] Figure 6 Stereogram of the main body of the resettor according to an embodiment of the present invention;

[0032] Figure 7 Stereogram of the reference frame of the resettor according to an embodiment of the present invention;

[0033] Figure 8 Stereogram of the three-jaw mounting portion of the resettor according to an embodiment of the present invention.

[0034] Figure 9 Stereogram of the handle of the resettor according to an embodiment of the present invention.

[0035] Description of the reference numerals:

[0036] Resettor 100

[0037] Main body 10

[0038] First end 11

[0039] Second end 12

[0040] Navigation system 20

[0041] Insertion portion 30

[0042] Nail portion 31

[0043] Receiving hole 311

[0044] Second limiting surface 312

[0045] Rod portion 32

[0046] Connecting rod 321

[0047] First limiting surface 322

[0048] Handle 40

[0049] Locking sleeve 50

[0050] First position 110

[0051] Second position 120

[0052] First step portion 51

[0053] Second step portion 52

[0054] Accommodating cavity 53

[0055] Wrench hole 54

[0056] Round corner 60

[0057] Mounting groove 70

[0058] The first planar part 81

[0059] The second planar part 82

[0060] The convex part 83

[0061] The reference frame 90

[0062] The three - jaw mounting part 91

[0063] The pin 201

[0064] The pin hole 202 Detailed implementation mode

[0065] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of these embodiments accordingly.

[0066] As Figure 1 、 Figure 2 、 Figure 6 and Figure 9 shown, an embodiment of the present invention provides a reset device 100, including: a main body 10; a navigation system 20, which is arranged on the main body 10 and used for navigation during the use of the reset device 100; an insertion part 30, which is arranged at the first end 11 of the main body 10.

[0067] In specific implementation, the navigation system 20, the insertion part 30, and the handle 40 can all be fixed to the main body 10 through pin rods. The main body 10 is approximately cylindrical, and the main body 10 is a matrix for carrying other parts of the reset device 100; the navigation system 20 is arranged on the main body 10 to monitor and evaluate the position and angle adjustment of the acetabulum in real time during the use of the reset device 100; the insertion part 30 is arranged at the first end 11 of the main body 10 and is used for inserting into the acetabulum to synchronously transmit the torsional or pushing - pulling motion on the reset device 100 to the acetabulum.

[0068] As Figure 2 shown, preferably, the insertion part 30 includes a nail part 31 and a rod part 32. The nail part 31 and the rod part 32 are connected through a connecting mechanism. The connecting mechanism includes a connecting rod 321 and a receiving hole 311 for the connecting rod 321 to insert. In this embodiment, the receiving hole 311 is arranged on the nail part 31, the connecting rod 321 is arranged on the rod part 32, the outer radial side of the connecting rod 321 has a first limiting surface 322, and the inner wall of the receiving hole 311 has a second limiting surface 312 matching the first limiting surface 322, so that when the receiving hole 311 rotates around its own axis, it can drive the connecting rod 321 to rotate. In some other implementation modes, the receiving hole 311 can also be arranged on the rod part 32 and the connecting rod 321 can be arranged on the nail part 31.

[0069] In the specific implementation, the nail part 31 is used to be inserted into the acetabulum; the rod part 32 is a connecting piece that serves as a connection between the nail part 31 and the main body 10; the nail part 31 and the rod part 32 are connected through the connecting rod 321 provided by themselves and the receiving hole 311 for the connecting rod 321 to be inserted, so that the nail part 31 and the rod part 32 are engaged with each other; the first limiting surface 322 and the second limiting surface 312 cooperate with each other, so that the receiving hole 311 can rotate around its own axis and drive the connecting rod 321 to rotate, while also preventing either the nail part 31 or the rod part 32 from idling and failing to accurately synchronize with the doctor's twisting of the reducer 100. This setting prevents the above factors that may occur during the operation, and provides help for the smoothness and reliability of the operation. In addition, as an alternative, the nail part 31 can also be replaced by a Schanz needle with the same receiving hole 311 or any tool with drilling, fixing or positioning, so as to achieve the same or similar technical effects.

[0070] like Figure 2 , Figure 4 and Figure 5 As shown, further, a locking sleeve 50 is rotatably sleeved on the outer side of the rod 32, and the inner wall of the locking sleeve 50 can be threadedly connected with the outer wall of the nail portion 31, and the locking sleeve 50 can move axially relative to the rod 32 between a first position 110 close to the nail portion 31 and a second position 120 away from the nail portion 31. Further, a wrench hole 54 for a wrench is provided on the radial side of the locking sleeve 50. Furthermore, the radial side of the handle 40 close to the insertion portion 30 is concave inwardly to form an arc surface.

[0071] In specific implementation, the locking sleeve 50 is used to lock the connecting rod 321 and the receiving hole 311 on the nail part 31 and the rod part 32, and the inner wall of the locking sleeve 50 is threadedly connected and matched with the outer wall of the nail part 31. Therefore, the locking sleeve 50 can move axially relative to the rod part 32 on the outside of the rod part 32 between a first position 110 close to the nail part 31 and a second position 120 away from the nail part 31. Specifically, when the locking sleeve 50 is threadedly connected to the nail part 31, the locking sleeve 50 can be rotated to make the locking sleeve 50 move axially. This movement specifically controls the tightness of the connection between the nail part 31 and the rod part 32. When in the first position 110, the nail part 31 and the rod part 32 are tightly engaged with each other, and when in the second position 120, the nail part 31 and the rod part 32 can be separated. In addition, during use, the doctor can use a wrench to cooperate with the wrench hole 54, so as to quickly and conveniently realize the locking or loosening process, reduce the physical work difficulty of the locking or loosening process, and speed up the surgical process. Secondly, the part of the radial side of the handle 40 close to the insertion part 30 is recessed inward to form an arc surface, so that it is convenient for the doctor to control and move the locking sleeve 50 by using this arc surface. Therefore, this setting enables the rod part 32 and the main body 10 to which it is connected to be separated from the nail part 31 when necessary, and then be connected to other nail parts 31 again in time for adjustment, improving the operability of the surgery.

[0072] As Figure 2 and Figure 4 shown, further, the rod part 32 has a first step part 51 protruding radially outward, and the locking sleeve 50 has a second step part 52 protruding radially inward. When the locking sleeve 50 is in the first position 110, the second step part 52 abuts against the side of the first step part 51 away from the nail part 31. Further, a spring can be arranged between the first step part 51 and the second step part 52.

[0073] In specific implementation, the first step part 51 constitutes a limiting structure for the locking sleeve 50. The locking sleeve 50 has a second step part 52 that cooperates with the first step part 51, and when the locking sleeve 50 is in the first position 110, the first step part 51 and the second step part 52 abut against each other. Therefore, the moving space of the locking sleeve 50 is limited to the side of the first step part 51 close to the main body 10. When the locking sleeve 50 is in the second position 120 to separate the nail part 31 from the rod part 32, the locking sleeve 50 will not come out from the direction of the nail part 31 to interfere with the surgical process, ensuring the reliability of the acetabular adjustment process. The spring arranged between the first step part 51 and the second step part 52 can automatically move the locking sleeve 50 to the second position 120 when the locking sleeve 50 does not perform the locking function, thereby reducing the operation amount of the doctor during the surgical process.

[0074] As Figure 2As shown, further, a receiving cavity 53 is provided on one side of the locking sleeve 50 facing the main body 10. When the locking sleeve 50 is in the second position 120, the main body 10 can be partially inserted into the receiving cavity 53.

[0075] In a specific implementation, through the receiving cavity 53, when the locking sleeve 50 is in the second position 120, the locking sleeve 50 is partially stacked outside the main body, that is, the main body 10 can be partially inserted into the receiving cavity 53. The receiving cavity 53 provides a larger operating space for the movement of the locking sleeve 50, so that it is clearly visible to distinguish whether the locking sleeve 50 is specifically in the first position 110 or the second position 120 in terms of position and space, and there is no need to make additional manual touch confirmation, which provides convenience for the operation of the doctor and further optimizes the time used in the surgical process.

[0076] As Figure 3 and Figure 4 As shown, further, the cross-sections of the receiving hole 311 and the connecting rod 321 are both square, and rounded corners 60 are provided at the four corners.

[0077] In a specific implementation, the receiving hole 311 and the connecting rod 321 are set to have a square cross-section, so that four first or second limiting surfaces 312 are respectively formed to realize transmission, preventing any one of the nail part 31 or the rod part 32 from idling and unable to accurately synchronously reflect the torsion of the repositioner 100 by the doctor. Rounded corners 60 are provided at the four corners of the square, thus preventing the four corners from deforming due to wear or collision and affecting the engagement between the receiving hole 311 and the connecting rod 321, resulting in the inability of the two to be engaged in place. At the same time, the rounded corners 60 reduce the processing difficulty. Therefore, this setting improves the reliability and easy processing of the repositioner 100 during operation. In other implementation manners, the cross-sections of the receiving hole 311 and the connecting rod 321 can also be other shapes, such as triangles, rectangles, trapezoids, etc., and the present invention does not limit this.

[0078] As Figure 1 、 Figure 2 and Figure 6 As shown, preferably, the first end 11 and the second end 12 of the main body 10 are opposite ends, the navigation system 20 is connected between the first end 11 and the second end 12 of the main body 10, the insertion part 30 is arranged at the first end 11, and a handle 40 is arranged at the second end 12.

[0079] In specific implementation, the outer shape of the handle 40 is designed to prevent it from slipping off and fit the shape of a human hand for holding. The handle 40 is used to facilitate holding, enabling the doctor to more easily make twisting or pushing / pulling adjustments. The navigation system 20 is connected between the first end 11 and the second end 12 of the main body 10, preventing the navigation system 20 from interfering with the insertion part 30 and the handle 40 spatially and improving the operational reliability of the resetter 100. In some embodiments, to meet the actual surgical needs, the first end 11 and the second end 12 can also be two ends of the main body 10 that are perpendicular to each other. For example, in the case where the shape of the main body 10 is "L". In other words, the insertion part 30 and the handle 40 can be connected to any two parts of the main body 10.

[0080] As Figure 2 , Figure 6 and Figure 7 shown, preferably, the main body 10 is provided with a mounting groove 70, and a part of the navigation system 20 is embedded in the mounting groove 70. The spatial structure of the mounting groove 70 is a cuboid, and fillets 60 are provided at its four corners; the main body 10 is provided with a first flat surface portion 81, the mounting groove 70 is arranged on the first flat surface portion 81, the navigation system 20 is provided with a second flat surface portion 82, and a protruding portion 83 is arranged on the second flat surface portion 82. The first flat surface portion 81 cooperates with the second flat surface portion 82, and the protruding portion 83 is inserted into the mounting groove 70 in a matching manner. The spatial structure of the protruding portion 83 is a cuboid, and fillets 60 are provided at its four corners.

[0081] In specific implementation, the navigation system 20 is partially embedded in the mounting groove 70 on the main body 10, making the connection between the two more stable and reliable. The main body 10 is provided with a first flat surface portion 81 to form a stable section plane, and a mounting groove 70 is further arranged on the stable section plane. A protruding portion 83 corresponding to the mounting groove 70 in position and shape is further arranged on the second flat surface portion 82 of the navigation system 20. Thus, the second flat surface portion 82 of the navigation system 20 can be parallel to the main body 10 by only fitting with the first flat surface portion 81 and inserting the protruding portion 83 into the mounting groove 70. And when the nail portion 31 is parallel to the main body 10, it can also be regarded as the navigation device being parallel to the nail portion 31. The limiting surfaces formed by the mounting groove 70 and the protruding portion 83 with a cuboid spatial structure cooperate with each other to prevent the installed components from rotating, so the stability and reliability are better. In this setting, the parallel navigation system 20 and the nail portion 31 enable the programming algorithm in the navigation system 20 not to consider the angle factor, achieving algorithm simplification, making the reaction of the navigation device faster, and further reducing the time used in the surgical process.

[0082] As Figure 2 and Figure 7As shown, preferably, the navigation system 20 includes a reference frame 90 and a navigation device (not shown in the figure). The reference frame 90 is inclined and extends away from the insertion portion 30, thus presenting an inclined inverted "L" shape. The navigation device is disposed at one end of the reference frame 90 away from the main body 10 and is partially embedded in a rectangular parallelepiped mounting groove on the reference frame 90.

[0083] In specific implementation, the reference frame 90 is inclined and extends away from the insertion portion 30, thereby further preventing the navigation device from interfering with the insertion portion 30 in terms of spatial position and improving the reliability of the operation of the resettor 100.

[0084] As Figure 8 shown, further, the navigation device is an NDI device. A three-claw mounting portion 91 is provided on the reference frame 90. The navigation device is connected to the reference frame 90 through the three-claw mounting portion 91. As an alternative solution, other navigation systems 20 can also be used, such as an ordinary camera or a 3D scanner. In these cases, corresponding shape adjustments need to be made to the mounting portion.

[0085] Based on the common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0086] Although the specific implementation manners of the present invention have been described above, those skilled in the art should understand that this is only an example. The protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these implementation manners, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A resetter, characterized in that, Comprising: A main body; A navigation system, which is arranged on the main body and used for navigation during the use of the repositioner; An insertion part, which is arranged at one end of the main body; Wherein, the insertion part includes a nail part and a rod part, the nail part and the rod part are connected by a connecting mechanism, the connecting mechanism includes a connecting rod and a receiving hole for the connecting rod to be inserted into, wherein, one of the connecting rod and the receiving hole is arranged on the nail part and the other is arranged on the rod part, the outer side of the connecting rod has a first limiting surface, and the inner wall of the receiving hole has a second limiting surface matching the first limiting surface, so that the receiving hole can drive the connecting rod to rotate when rotating around its own axis; Wherein, a locking sleeve is rotatably sleeved on the outer side of the rod part, the inner wall of the locking sleeve can be threadedly connected with the outer wall of the nail part, and the locking sleeve can move axially relative to the rod part between a first position close to the nail part and a second position far from the nail part; and Wherein, a receiving cavity is arranged on one side of the locking sleeve facing the main body, and when the locking sleeve is in the second position, the main body can be partially inserted into the receiving cavity.

2. The reseter according to claim 1, characterized in that, The rod part has a first stepped part protruding radially outwards, and the locking sleeve has a second stepped part protruding radially inwards. When the locking sleeve is in the first position, the second stepped part abuts against the side of the first stepped part far from the nail part.

3. The resetter according to claim 1, characterized in that, The cross sections of the receiving hole and the connecting rod are both square, and rounded corners are arranged at the four corners.

4. The resetter according to claim 1, characterized in that, The first end and the second end of the main body are opposite ends, the navigation system is connected between the first end and the second end of the main body, the insertion part is arranged at the first end, and a handle is arranged at the second end.

5. The resetter according to claim 1, characterized in that, The main body is provided with a mounting groove, and part of the navigation system is embedded in the mounting groove; the main body is provided with a first flat part, the mounting groove is arranged on the first flat part, the navigation system is provided with a second flat part, a protruding part is arranged on the second flat part, the first flat part cooperates with the second flat part, and the protruding part is inserted into the mounting groove in a matching manner.

6. The resettor according to claim 1, wherein, The navigation system includes a reference frame and a navigation device, the reference frame is inclined towards the direction away from the insertion part, and the navigation device is arranged at one end of the reference frame far from the main body.

7. The resetter according to claim 6, characterized in that, The navigation device is an NDI device, a three-claw mounting part is arranged on the reference frame, and the navigation device is connected with the reference frame through the three-claw mounting part.

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