Director

Abstract

The present invention provides a guide, which includes: a base and two or more guide tube assemblies; the base has two or more through-holes, the guide tube assemblies are used to be detachably inserted into the through-holes and assembled and connected with the base, and each through-hole is only for one guide tube assembly to be inserted; wherein, the guide tube assembly includes a first connection structure, and the base includes a second connection structure, and the first connection structure and the second connection structure are used to be adaptively connected to limit the relative position of the guide tube assembly and the base when the guide tube assembly is assembled and connected with the base. In this configuration, by configuring the guide tube assembly to be detachable, the guide tube assembly can be removed and used alone during use, avoiding the abutment and obstruction of the remaining guide tube assemblies with the skin and muscle tissue, so that each guide tube assembly can penetrate into the incised skin and muscle tissue, thereby protecting the skin and muscle tissue.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a guide. Background Art

[0002] During orthopedic robotic optical navigation surgery, multiple fixation pins are typically inserted percutaneously into the bone to rigidly connect the target to the bone. These pins are typically slender, cylindrical steel needles with an external thread on one end. The surgeon typically first uses a scalpel to incise the skin, separate the muscles, and then uses a medical drill to drive the pins into the bone through an integrated, multi-hole guide.

[0003] However, when the first anchoring needle is inserted, the skin and muscle have not yet been incised and separated for the other anchoring needles. This results in the guide tube of the integrated multi-porous guide device, which is adapted for the first anchoring needle, being blocked by the contact between the other guide tubes and the skin and muscle tissue, and unable to penetrate the subcutaneous muscle. This effectively fails to separate the anchoring needle from the skin and muscle. At this time, the rotating outer thread of the anchoring needle directly contacts the skin and muscle tissue without protection, causing additional damage to the skin and muscle tissue. Summary of the Invention

[0004] The object of the present invention is to provide a guide to solve the problem that the existing guide is difficult to effectively isolate the fixing needle and the skin and muscles.

[0005] In order to solve the above technical problems, the present invention provides a guide, which includes: a base and two or more guide tube assemblies;

[0006] The base has two or more through-going through-holes, the guide tube assembly is used to be detachably inserted into the through-holes and assembled and connected to the base, and each through-hole is only for one guide tube assembly to pass through;

[0007] In which, the guide tube assembly includes a first connecting structure, and the base includes a second connecting structure. The first connecting structure and the second connecting structure are used to be adaptively connected to limit the relative position of the guide tube assembly and the base when the guide tube assembly is assembled and connected to the base.

[0008] Optionally, the first connection structure and the second connection structure include mechanical connection structures, and / or the first connection structure and the second connection structure include magnetic connection structures.

[0009] Optionally, the first connection structure includes a first limiting surface, which is angled with the axial direction of the guide tube assembly; the second connection structure includes a second limiting surface, which is angled with the axial direction of the through hole; the guide tube assembly is used to rotate around its own axis to drive the first limiting surface and the second limiting surface to abut against or separate from each other.

[0010] Optionally, the guide tube assembly includes a guide tube body and a limiting wedge block arranged on the periphery of the guide tube body, and the first limiting surface is arranged on the limiting wedge block.

[0011] Optionally, the guide tube assembly includes more than two limiting wedge blocks, and the two or more limiting wedge blocks are evenly distributed circumferentially around the outer circumference of the guide tube assembly; the second connecting structure includes more than two second limiting surfaces, and the two or more second limiting surfaces are evenly distributed circumferentially around the central axis of the through hole.

[0012] Optionally, the first connection structure also includes a third limiting surface, which is perpendicular to the axial direction of the guide tube body and is arranged opposite to the first limiting surface; the second connection structure also includes a fourth limiting surface, which is perpendicular to the axial direction of the through hole; the third limiting surface is used to abut against the fourth limiting surface.

[0013] Optionally, the guide tube assembly includes a shoulder arranged on the outer periphery of the guide tube body, and the shoulder is arranged at intervals with the limiting wedge block along the axial direction of the guide tube body; the third limiting surface is arranged on the shoulder; the base includes a limiting groove located at the axial end of the through hole, and the fourth limiting surface is arranged on the bottom surface of the limiting groove.

[0014] Optionally, the base includes a boss protruding radially inward and formed in the through hole, and the boss includes two end faces arranged along the axial direction of the through hole, and each of the end faces is provided with the second limiting surface and the fourth limiting surface, the first limiting surface is used to abut against the second limiting surface on one of the end faces, and the third limiting surface is used to abut against the fourth limiting surface on the other end face.

[0015] Optionally, the first connection structure includes an outer peripheral wall of the guide tube body, and the second connection structure includes an inner side wall of the boss, and the inner side wall of the boss is used to abut against the outer peripheral wall of the guide tube body to limit the radial position of the guide tube body.

[0016] Optionally, the first connection structure includes an external thread, the second connection structure includes an internal thread, and the guide tube assembly is used to rotate around its own axis to drive the external thread to connect with or separate from the internal thread.

[0017] Optionally, the guide tube assembly includes a guide tube body and a shoulder arranged on the outer periphery of the guide tube body, and the external thread is arranged on the shoulder; the base includes a limiting groove located at the axial end of the through hole, and the internal thread is arranged on the limiting groove.

[0018] Optionally, the first connecting structure includes a fifth limiting surface, which is perpendicular to the axial direction of the guide tube body; the base has a sixth limiting surface, which is perpendicular to the central axis of the through hole; and the fifth limiting surface is used to abut against the sixth limiting surface.

[0019] Optionally, the fifth limiting surface is arranged on the shaft shoulder, and the sixth limiting surface is arranged on the bottom surface of the limiting groove.

[0020] Optionally, the first connection structure includes a magnet, and the second connection structure can be attracted to the magnet.

[0021] Optionally, the guide tube assembly includes a guide tube body and a shoulder arranged on the outer periphery of the guide tube body, and the base includes a limiting groove located at the axial end of the through hole, and the limiting groove is used to accommodate the shoulder; at least one of the shoulder and the limiting groove includes the magnet, and the other can be attracted to the magnet.

[0022] Optionally, the guide tube assembly includes ribs arranged on the outer periphery of the guide tube body, and the ribs extend along the axial direction of the guide tube body.

[0023] Optionally, the base includes a rotation limiting groove, and the rib plate is inserted into the rotation limiting groove, so that the guide tube assembly is restricted from circumferential rotation by the rotation limiting groove.

[0024] Optionally, when the guide tube assembly is inserted into the through hole from one end of the through hole and assembled and connected with the base, the guide tube assembly does not extend beyond the other end of the through hole.

[0025] To summarize, the guide provided by the present invention includes: a base and two or more guide tube assemblies; the base has two or more through-holes, and the guide tube assembly is used to be detachably inserted into the through-holes and assembled and connected with the base, and each of the through-holes is only for one guide tube assembly to be inserted; wherein, the guide tube assembly includes a first connecting structure, and the base includes a second connecting structure, and the first connecting structure and the second connecting structure are used to be adaptively connected to limit the relative position of the guide tube assembly and the base when the guide tube assembly is assembled and connected with the base.

[0026] With this configuration, by configuring the guide tube assembly to be detachable, the guide tube assembly can be removed and used alone during use, avoiding the obstruction of the remaining guide tube assemblies against the skin and muscle tissue, so that each guide tube assembly can penetrate deeply into the incised skin and muscle tissue, and protect the skin and muscle tissue from damage during the installation of the fixing needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Those skilled in the art will appreciate that the accompanying drawings are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention.

[0028] Figure 1a is a perspective view of a guide according to a first embodiment of the present invention;

[0029] Figure 1b is a side view of the guide of embodiment 1 of the present invention;

[0030] Figure 1c is a bottom view of the guide of embodiment 1 of the present invention;

[0031] Figure 1d is a top view of the guide of Example 1 of the present invention;

[0032] Figure 1e is an axial cross-sectional view of the guide of the first embodiment of the present invention;

[0033] Figure 2a is a perspective view of a guide tube assembly according to a first embodiment of the present invention;

[0034] Figure 2b is a side view of the guide tube assembly according to the first embodiment of the present invention;

[0035] Figure 2c is a side view of the guide tube assembly of the first embodiment of the present invention from another angle;

[0036] Figure 2d is an axial cross-sectional view of the guide tube assembly according to the first embodiment of the present invention;

[0037] Figure 3a is a three-dimensional diagram of a base according to a first embodiment of the present invention;

[0038] Figure 3b is a top view of the base according to the first embodiment of the present invention;

[0039] Figure 3c is an axial cross-sectional view of the base according to the first embodiment of the present invention;

[0040] Figure 4a is a perspective view of a guide according to a second embodiment of the present invention;

[0041] Figure 4b is a side view of a guide according to a second embodiment of the present invention;

[0042] Figure 4c is a bottom view of a guide according to a second embodiment of the present invention;

[0043] Figure 4d is a top view of a guide according to a second embodiment of the present invention;

[0044] Figure 4e is an axial cross-sectional view of a guide according to a second embodiment of the present invention;

[0045] Figure 5a is a perspective view of a guide tube assembly according to a second embodiment of the present invention;

[0046] Figure 5b is a side view of a guide tube assembly according to a second embodiment of the present invention;

[0047] Figure 5c is a side view of the guide tube assembly of the second embodiment of the present invention from another angle;

[0048] Figure 5d is an axial cross-sectional view of a guide tube assembly according to a second embodiment of the present invention;

[0049] Figure 6a is a three-dimensional diagram of a base according to a second embodiment of the present invention;

[0050] Figure 6b is a top view of a base according to a second embodiment of the present invention;

[0051] Figure 6c is an axial cross-sectional view of the base of the second embodiment of the present invention;

[0052] Figure 7a is a perspective view of a guide according to a third embodiment of the present invention;

[0053] Figure 7b is a side view of a guide according to a third embodiment of the present invention;

[0054] Figure 7c is a bottom view of a guide according to a third embodiment of the present invention;

[0055] Figure 7d is a top view of a guide according to a third embodiment of the present invention;

[0056] Figure 7e is an axial cross-sectional view of a guide according to a third embodiment of the present invention;

[0057] Figure 8a is a perspective view of a guide tube assembly according to a third embodiment of the present invention;

[0058] Figure 8b is a side view of a guide tube assembly according to a third embodiment of the present invention;

[0059] Figure 8c is a side view of the guide tube assembly of the third embodiment of the present invention from another angle;

[0060] Figure 8d is an axial cross-sectional view of the guide tube assembly according to the third embodiment of the present invention;

[0061] Figure 9a is a perspective view of a guide according to a fourth embodiment of the present invention;

[0062] Figure 9b is a side view of a guide according to a fourth embodiment of the present invention;

[0063] Figure 9c is a bottom view of a guide according to a fourth embodiment of the present invention;

[0064] Figure 9d is a top view of a guide according to a fourth embodiment of the present invention;

[0065] Figure 9e is an axial cross-sectional view of a guide according to a fourth embodiment of the present invention;

[0066] Figure 10a is a perspective view of a guide tube assembly according to a fourth embodiment of the present invention;

[0067] Figure 10b is a side view of a guide tube assembly according to a fourth embodiment of the present invention;

[0068] Figure 10c is a side view of the guide tube assembly of the fourth embodiment of the present invention from another angle;

[0069] Figure 10d is an axial cross-sectional view of a guide tube assembly according to a fourth embodiment of the present invention;

[0070] Figure 11a is a perspective view of a guide according to a fifth embodiment of the present invention;

[0071] Figure 11b is a side view of a guide according to a fifth embodiment of the present invention;

[0072] Figure 11c is a bottom view of a guide according to a fifth embodiment of the present invention;

[0073] Figure 11d is a top view of a guide according to a fifth embodiment of the present invention;

[0074] Figure 11e is an axial cross-sectional view of a guide according to a fifth embodiment of the present invention;

[0075] Figure 12a is a perspective view of a guide tube assembly according to a fifth embodiment of the present invention;

[0076] Figure 12b is a side view of a guide tube assembly according to a fifth embodiment of the present invention;

[0077] Figure 12c is a side view of the guide tube assembly of the fifth embodiment of the present invention from another angle;

[0078] Figure 12dis an axial cross-sectional view of a guide tube assembly according to a fifth embodiment of the present invention;

[0079] Figure 13a is a perspective view of a base according to a fifth embodiment of the present invention, which includes a magnet;

[0080] Figure 13b is a top view of a base according to a fifth embodiment of the present invention, which includes a magnet;

[0081] Figure 13c is an axial cross-sectional view of a base according to a fifth embodiment of the present invention, which includes a magnet;

[0082] Figure 14a is a perspective view of a guide tube assembly according to a fifth embodiment of the present invention, which includes a magnet;

[0083] Figure 14b is an axial cross-sectional view of a guide tube assembly according to a fifth embodiment of the present invention, which includes a magnet;

[0084] Figure 15a is a schematic diagram of step 1 of using the guide according to an embodiment of the present invention;

[0085] Figure 15b is a schematic diagram of step 2 of using the guide according to an embodiment of the present invention;

[0086] Figure 15c 2 is a schematic diagram of step three of using the guide according to an embodiment of the present invention.

[0087] In the attached figure:

[0088] 1-base; 10-through hole; 100-boss; 101-main body channel; 102-main body channel; 11-limiting groove; 111-second limiting surface; 112-fourth limiting surface; 12-limiting groove; 121-internal thread; 122-sixth limiting surface; 13-limiting groove; 131-rotation limiting groove;

[0089] 2-guide tube assembly; 20-guide tube body; 21-limiting wedge block; 211-first limiting surface; 22-shaft shoulder; 221-third limiting surface; 23-rib; 24-shaft shoulder; 241-external thread; 242-fifth limiting surface; 25-shaft shoulder; 3-magnet; 901, 902-assembly; 91-skin and muscle tissue; 92-bone; 93-fixing needle. DETAILED DESCRIPTION

[0090] To make the objects, advantages, and features of the present invention more clearly apparent, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale. They are only used to conveniently and clearly assist in illustrating the purposes of the embodiments of the present invention. In addition, the structures shown in the drawings are often part of the actual structure. In particular, different drawings may need to illustrate different focuses and sometimes use different scales.

[0091] As used herein, the singular forms "a," "an," and "the" include plural referents. The term "or" is generally used to include "and / or," the term "several" is generally used to include "at least one," and the term "at least two" is generally used to include "two or more." Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, features defined as "first," "second," and "third" may explicitly or implicitly include one or at least two of the features. The terms "one end" and "the other end," as well as "proximal" and "distal," generally refer to corresponding portions and not just endpoints. The terms "proximal" and "distal" are used herein with respect to a guide having an end for insertion into the human body and an end extending outside the body. The term "proximal" refers to the location of a component closer to the end of the guide extending outside the body, while the term "distal" refers to the location of a component closer to the end of the guide inserted into the human body. Optionally, in manual or hand-operated application scenarios, the terms "proximal" and "distal" are defined herein relative to an operator, such as a surgeon or clinician. The term "proximal" refers to the position of an element that is closer to the operator, and the term "distal" refers to the position of an element that is closer to the guide and therefore further away from the operator. In addition, as used in the present invention, "installed", "connected", "connected", and one element "set" to another element should be understood in a broad sense, usually only indicating that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the connection, coupling, cooperation or transmission between the two elements can be direct or indirect through an intermediate element, and cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, one element can be in any orientation such as inside, outside, above, below or on one side of another element, unless the content clearly indicates otherwise. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Additionally, directional terms such as above, below, up, down, upward, downward, left, right, etc. are used with respect to exemplary embodiments as they are shown in the figures, with an upward or upper direction toward the top of the corresponding figure and a downward or lower direction toward the bottom of the corresponding figure.

[0092] The object of the present invention is to provide a guide to solve the problem that the existing guide is difficult to effectively isolate the fixing needle and the skin and muscles.

[0093] The following description is given with reference to the accompanying drawings.

[0094] [Example 1]

[0095] Please refer to Figures 1a to 3c , embodiment 1 of the present invention provides a guide, which includes: a base 1 and two or more guide tube assemblies 2; the base 1 has two or more through-holes 10, the guide tube assemblies 2 are used to be detachably inserted into the through-holes 10 and assembled and connected with the base 1, and each through-hole 10 is only for one guide tube assembly 2 to pass through.

[0096] With such a configuration, by configuring the guide tube assembly 2 to be detachable, the guide tube assembly 2 can be removed and used separately during use. When inserting the first fixing needle, a separately detachable guide tube assembly 2 can be used, or a guide assembly that is only assembled and connected to the base 1 with one guide tube assembly 2 can be used. At this time, after incising the skin and separating the muscles, the only guide tube assembly 2 can be deeply inserted into the subcutaneous muscle tissue to protect the insertion of the first fixing needle. At this time, since there is only one guide tube assembly 2, the other guide tube assemblies 2 will not be blocked by the skin and muscle tissue. After completing the implantation of the first fixing needle, the first and second guide tube assemblies 2 can be assembled and connected to the base 1 together to determine the entry position of the second fixing needle (i.e., the intersection of the extension direction of the second guide tube assembly 2 and the skin), and then the skin is incised and separated. Then, the first guide tube assembly 2 is placed on the first fixing needle and penetrated into the subcutaneous muscle tissue. At this time, the second guide tube assembly 2 also penetrates into the subcutaneous muscle tissue to protect the insertion of the second fixing needle. By analogy, the guide can be further assembled and connected with several other guide tube assemblies 2 to protect the insertion of several other fixing needles. It can be understood that by configuring the guide tube assemblies 2 to be detachable, each guide tube assembly 2 can be allowed to penetrate the incised skin and muscle tissue, thereby protecting the skin and muscle tissue from damage during the installation of the fixing needles.

[0097] exist Figures 1a to 3cIn the illustrated example, the base 1 includes three through-holes 10. It should be noted that the three through-holes 10 are merely an example of a guide and are not intended to be limiting of the guide. In particular, for a guide including three through-holes 10, it is not necessary to use all three through-holes 10. Instead, only one, two, or all three through-holes 10 may be used. When only one or two of the through-holes 10 are used, the operator may select any one or two of the through-holes 10, regardless of the order in which they are used. For other guides including a greater or lesser number of through-holes 10, the above principles may apply.

[0098] Furthermore, this embodiment does not restrict the arrangement of the through-holes 10. Two or more through-holes 10 can be arranged in parallel or at an angle. Furthermore, two or more through-holes 10 can be arranged in a straight line, or multiple through-holes 10 can be arranged in any manner, such as in a triangular arrangement. The distance between through-holes 10 can be set according to actual needs and is not restricted in this embodiment.

[0099] In addition, the number of guide tube assemblies 2 may be the same as or different from the number of through holes 10. For example, a base 1 including three through holes 10 may be adapted to have three guide tube assemblies 2 or only two guide tube assemblies 2.

[0100] Preferably, the guide tube assembly 2 includes a first connecting structure, and the base 1 includes a second connecting structure. The first connecting structure and the second connecting structure are used to be adaptively connected to limit the relative position of the guide tube assembly 2 and the base 1 when the guide tube assembly 2 is assembled and connected to the base 1. It should be noted that limiting the relative position of the guide tube assembly 2 and the base 1 here means that the guide tube assembly 2 and the base 1 do not produce relative displacement and are relatively fixed when there is no external force driving them to separate. Preferably, the relative position of the two is at least limited in the radial and axial directions. When the guide tube assembly 2 is assembled to the base 1, after the guide tube assembly 2 is inserted into the penetration hole 10, the first connecting structure and the second connecting structure can be adaptively connected to limit the relative position of the guide tube assembly 2 and the base 1, thereby fixing the guide tube assembly 2 on the base 1 to achieve orientation. On the other hand, the operator can also conveniently detach the guide tube assembly 2 from the base 1 through the first connecting structure and the second connecting structure to facilitate the independent use of the guide tube assembly 2 or to avoid the temporarily unnecessary guide tube assembly 2 from forming abutment and obstruction with the skin and muscle tissue.

[0101] Optionally, in this embodiment 1, the first connection structure and the second connection structure include a mechanical connection structure. It should be noted that the mechanical connection structure refers to a connection relationship formed by a direct physical connection structure such as abutment limit, snap connection, interference fit, threaded connection, etc. Please refer to Figures 2a to 2d as well as Figures 3a to 3c The first connection structure includes a first limiting surface 211, and the second connection structure includes a second limiting surface 111. The first limiting surface 211 forms an angle with the axial direction of the guide tube assembly 2; the second limiting surface 111 forms an angle with the axial direction of the through-hole 10. The guide tube assembly 2 is configured to rotate about its own axial direction to drive the first limiting surface 211 and the second limiting surface 111 to abut or separate. When the first limiting surface 211 and the second limiting surface 111 abut, they can prevent the guide tube assembly 2 from moving axially relative to the base 1, thereby limiting the relative position of the guide tube assembly 2 and the base 1. The first limiting surface 211 and the second limiting surface 111 can be helical surfaces, and their angles are compatible (i.e., the angle between the first limiting surface 211 and the axial direction of the guide tube assembly 2 is approximately the same as the angle between the second limiting surface 111 and the axial direction of the through-hole 10). As a result, the first limiting surface 211 and the second limiting surface 111 can abut against each other as the guide tube assembly 2 rotates.

[0102] In an alternative embodiment, the guide tube assembly 2 includes a guide tube body 20 and a limiting wedge 21 disposed on the outer periphery of the guide tube body 20. The first limiting surface 211 is provided on the limiting wedge 21. The guide tube body 20 is preferably a generally cylindrical tube, and the outer contour of its distal end may be slightly constricted to facilitate insertion into skin and muscle tissue. It should be noted that the central axis of the guide tube body 20 is also the central axis of the entire guide tube assembly 2.

[0103] Preferably, the guide tube assembly 2 includes more than two limiting wedge blocks 21, and the two or more limiting wedge blocks 21 are evenly distributed around the outer circumference of the guide tube assembly 2; the second connection structure includes more than two second limiting surfaces 111, and the two or more second limiting surfaces 111 are evenly distributed around the central axis of the through hole 10. The provision of more than two limiting wedge blocks 21 and second limiting surfaces 111 can improve the uniformity of the force between the guide tube assembly 2 and the base 1, and improve the stability of the connection between the guide tube assembly 2 and the base 1. Figures 1a to 3c In the illustrated example, the guide tube assembly 2 includes two limiting wedge blocks 21, and correspondingly, the limiting groove 11 includes two second limiting surfaces 111. Preferably, the circumferential distribution angle of the limiting wedge blocks 21 around the guide tube body 20 (i.e., the central angle of the circumferential extension range of the limiting wedge blocks 21 around the guide tube body 20 relative to the axis of the guide tube body 20) is no greater than 90°, and the circumferential distribution angle of the second limiting surfaces 111 around the axis of the limiting groove 11 is no greater than 90°. It will be understood that in other embodiments, the number of limiting wedge blocks 21 and second limiting surfaces 111 is not limited to two, and may also be a larger number.

[0104] Furthermore, the first connection structure further includes a third limiting surface 221, which is perpendicular to the axial direction of the guide tube body 20; and along the axial direction of the guide tube body 20, the third limiting surface 221 is arranged opposite the first limiting surface 211. The second connection structure further includes a fourth limiting surface 112, which is perpendicular to the axial direction of the through hole 10; the third limiting surface 221 is used to abut against the fourth limiting surface 112. The function of the third limiting surface 221 and the fourth limiting surface 112 is to limit the axial position of the guide tube assembly 2 relative to the base 1 through the abutment between the third limiting surface 221 and the fourth limiting surface 112, combined with the abutment between the first limiting surface 211 and the second limiting surface 111. Specifically, when the first limiting surface 211 and the second limiting surface 111 abut against each other, the guide tube assembly 2 can be restricted from moving in the direction facing the first limiting surface 211, and when the third limiting surface 221 and the fourth limiting surface 112 abut against each other, the guide tube assembly 2 can be restricted from moving in the direction facing the third limiting surface 221. Figure 1a In the illustrated example, the third limiting surface 221 is located above the fourth limiting surface 112, and the first limiting surface 211 is coupled to the bottom of the second limiting surface 111. Thus, the axial movement of the guide tube assembly 2 is limited. Since the third limiting surface 221 and the first limiting surface 211 are arranged relative to each other, the displacement of the guide tube assembly 2 in both axial directions is limited, thereby firmly securing the guide tube assembly 2 in the base 1. It should be understood that since the first limiting surface 211 is at a certain angle relative to the axial direction of the guide tube body 20, the relative arrangement of the third limiting surface 221 and the first limiting surface 211 here means that the angle formed by their normal directions is not less than 135°.

[0105] In an alternative embodiment, the guide tube assembly 2 includes a shoulder 22 spaced apart from the limiting wedge 21 along the axial direction of the guide tube body 2; a third limiting surface 221 is provided on the shoulder 22; the base 1 includes a limiting groove 11 located at an axial end of the through hole 10, and a fourth limiting surface 112 is provided on the bottom surface of the limiting groove 11. The limiting groove 11 can be a circular open cavity recessed in the base 1, with one axial end coaxially connected to the through hole 10 and the other end open to the outside.

[0106] Preferably, a limiting groove 11 is provided at each of the two axial ends of the through hole 10. Optionally, not only a second limiting surface 111 but also a fourth limiting surface 112 can be provided on the bottom surface of the limiting groove 11. The fourth limiting surface 112 can be radially arranged on the outside of the second limiting surface 111 to form a ring shape. Since a limiting groove 11 is provided at each of the two axial ends of the through hole 10, it can be understood that the shaft shoulder 22 is used to adapt to one of the limiting grooves 11, and the limiting wedge block 21 is used to adapt to the other limiting groove 11. That is, if the second limiting surface 111 of one of the limiting grooves 11 abuts against the first limiting surface 211 on the limiting wedge block 21 of the guide tube assembly 2, the fourth limiting surface 112 of the limiting groove 11 is left unused. When the fourth limiting surface 112 of the other limiting groove 11 abuts the third limiting surface 221 on the shoulder 22 of the guide tube assembly 2, the second limiting surface 111 of the limiting groove 11 remains unused. With this configuration, the front and back sides of the base 1 are equivalent in the axial direction, and the operator does not need to distinguish between the front and back sides of the base 1, facilitating operation during surgery. It is understood that in other embodiments, the fourth limiting surface 112 can also be directly provided on the base 1, rather than necessarily provided within the limiting groove 11. That is, the base 1 can distinguish between the front and back sides in the axial direction, and the base 1 only includes one limiting groove 11. With this configuration, the operator must insert the guide tube assembly 2 into the perforation 10 in a fixed direction. Furthermore, the cross-sectional shape of the shoulder 22 matches that of the limiting groove 11. After the shoulder 22 and the limiting groove 11 are adapted and connected, the limiting groove 11 can limit the radial position of the shoulder 22, further improving the stability of the connection.

[0107] Optionally, the guide tube assembly 2 includes ribs 23 provided on the outer periphery of the guide tube body 20, and the ribs 23 extend along the axial direction of the guide tube body 20. This embodiment does not limit the number of ribs 23, for example Figure 2a In the illustrated example, there are two ribs 23, distributed 180° around the circumference of the guide tube body 20. It will be appreciated that in other embodiments, the number of ribs 23 may be one or more. The ribs 23 are intended to be gripped by the operator, facilitating the application of torque during tightening. Optionally, the ribs 23 are positioned on the side of the shoulder 22 away from the stop wedge 21; preferably, the ribs 23 are connected to the shoulder 22.

[0108] Furthermore, in some embodiments, the ribs 23 may have a certain degree of deformation capability and a certain degree of rigidity, and the base 1 includes a rotation limiting groove 131 (please refer to Figure 13a), the ribs 23 can abut, be squeezed, and deform against the base 1 as the guide tube body 20 rotates, thereby engaging with the limiting groove 131 when the first limiting surface 211 abuts the second limiting surface 111. Specifically, the ribs 23 are designed to be inserted into the limiting groove 131, thereby limiting the circumferential rotation of the guide tube assembly 2. Of course, it is understood that if the operator applies a greater torque to drive the guide tube body 20 to rotate in the opposite direction, the ribs 23 can be deformed again and withdrawn from the limiting groove 131, thereby separating the guide tube assembly 2 from the base 1.

[0109] Optionally, the rotation-limiting grooves 131 may be formed on the inner circumferential wall of the limiting groove 13 along the axial direction of the limiting groove 13, and the number and distribution of the rotation-limiting grooves 131 may be adapted to the number and distribution of the ribs 23. The provision of the rotation-limiting grooves 131 can limit the circumferential rotation of the guide tube assembly 2 relative to the base 1, and prevent the guide tube assembly 2 from disengaging in the reverse direction after being rotated into position, thereby improving the stability of the assembled connection between the guide tube assembly 2 and the base 1.

[0110] Optionally, the base 1 includes a boss 100 that protrudes radially inward and is formed in the through hole 10. The boss 100 includes two end surfaces arranged along the axial direction of the through hole 10, and each end surface is provided with a second limiting surface 111 and a fourth limiting surface 112. The first limiting surface 211 is used to abut against the second limiting surface 111 on one of the end surfaces, and the third limiting surface 221 is used to abut against the fourth limiting surface 112 on the other end surface. It can be understood that a portion of the axial end surface of the boss 100 can be flush with the bottom surface of the limiting groove 11, and the fourth limiting surface 112 can extend from the bottom surface of the limiting groove 11 to a portion of the end surface of the boss 100. The second limiting surface 111 and the fourth limiting surface 112 are simultaneously provided on each end surface of the boss 100, and the operator does not need to distinguish between the front and back sides of the base 1, which facilitates operation during surgery. In a preferred example, along the axial direction of the through hole 10, the fourth limiting surface 112 protrudes from the second limiting surface 111, that is, the fourth limiting surface 112 is relatively located on the outside of the second limiting surface 111, and can form an abutment with the third limiting surface 221 on the shoulder 22 before the second limiting surface 111. Preferably, the end face structures of the boss 100 at both ends of the axial direction are similar. Therefore, when the third limiting surface 221 is combined with the fourth limiting surface 112 on the upper end face of the boss 100, the first limiting surface 211 is combined with the second limiting surface 111 on the lower end face of the boss 100. The reverse is also similar. With such a configuration, the front and back of the base 1 along the axial direction are equivalent, and the operator does not need to distinguish between the front and back sides of the base 1, which facilitates operation during surgery.

[0111] For the sake of better explanation, a limiting groove 11 is defined. It should be noted that in actual products, the limiting groove 11 can be a slot formed separately at the axial end of the through hole 10, or it can be a part of the through hole 10, that is, the through hole 10 and the limiting groove 11 are integrated.

[0112] Furthermore, the first connecting structure comprises the outer circumferential wall of the guide tube body 20, and the second connecting structure comprises the inner sidewall of the boss 100. The inner sidewall of the boss 100 is configured to abut against the outer circumferential wall of the guide tube body 20 to limit the radial position of the guide tube body 20. In this configuration, the inner sidewall of the boss 100 abuts against the outer circumferential wall of the guide tube body 20, thereby limiting radial displacement of the guide tube body 20 and improving the stability of the guide tube body 20 within the through-hole 10.

[0113] Preferably, the through hole 10 includes a main channel 101 for the guide tube body 20 to pass through and an auxiliary channel 102 for the limiting wedge block 21 or the shaft shoulder 22 to pass through. The main channel 101 and the auxiliary channel 102 are adjacent to and connected to each other. In one embodiment, the main channel 101 is defined by the inner side wall of the boss 100, and the auxiliary channel 102 is defined by the circumferential side wall of the boss 100. Since the shaft shoulder 22 and the limiting wedge block 21 are arranged relatively spaced apart, the shaft shoulder 22 or the limiting wedge block 21 needs to be passed through the through hole 10 during use. Figures 1a to 3c In the illustrated example, the shoulder 22 is generally disc-shaped with a relatively large outer diameter. The diameter of the circumscribed circle of the limiting wedge block 21 is relatively small, and the auxiliary passage 102 is used to allow the limiting wedge block 21 to pass through. During use, the operator inserts the end of the guide tube assembly 2, which is adjacent to the limiting wedge block 21, into the perforation 10. The guide tube body 20 then passes through the main passage 101, and the limiting wedge block 21 passes through the auxiliary passage 102. After the limiting wedge block 21 passes through the auxiliary passage 102, the shoulder 22 abuts against the limiting groove 11 at the other end of the base 1. The guide tube assembly 2 can then be rotated to abut the first limiting surface 211 on the limiting wedge block 21 against the second limiting surface 111 on the limiting groove 11. It will be appreciated that in other embodiments, the shoulder 22 may have a smaller outer diameter, while the diameter of the circumscribed circle of the limiting wedge block 21 is relatively large. In this case, the rib 23 can be positioned on the side of the limiting wedge 21 away from the shaft shoulder 22. With this configuration, the auxiliary channel 102 can be used to allow the shaft shoulder 22 to pass through. During use, the operator inserts the end of the guide tube assembly 2 near the shaft shoulder 22 into the through-hole 10, the guide tube body 20 passes through the main channel 101, and the shaft shoulder 22 passes through the auxiliary channel 102.

[0114] The following combination Figures 15a to 15c , the steps for using a guide including three through-holes 10 are described.

[0115] Step 1: Use a scalpel to cut and peel open the skin and muscle tissue 91 to establish an access path for the first guide tube assembly 2 , and insert the first guide tube assembly 2 along this access path until it rests against the surface of the bone 92 .

[0116] Step 2: Insert the first fixing needle 93 from the inner cavity of the first guide tube assembly 2, and use a power tool to drive the first fixing needle 93 into the bone 92, as shown in FIG. Figure 15a As shown, the first guide tube assembly 2 is then pulled out, thereby completing the installation of the first fixing needle 93. The first guide tube assembly 2 can protect the skin and muscle tissue 91 from being damaged by the threaded section 931 of the first fixing needle 93, thereby reducing damage to the patient. It should be understood that in steps 1 and 2, the first guide tube assembly 2 can be used independently or assembled and connected with the base 1 for use together. If the first guide tube assembly 2 is assembled and connected with the base 1 for use together, it must be ensured that at this time the base 1 is only connected to the first guide tube assembly 2 and no other guide tube assemblies 2 are assembled on the base 1.

[0117] Step 3: Insert the two guide tube assemblies 2 into the two through-holes 10 of the base 1 respectively, and rotate and lock them to form an assembly connection to form an assembly 901 (if the first guide tube assembly 2 has been assembled and connected to the base 1 in steps 1 and 2, then at this time, only the second one needs to be inserted into the second through-hole 10 and assembled with the base 1). Put the first guide tube assembly 2 of the assembly 901 outside the first fixing needle 93 and move it distally until the second guide tube assembly 2 rests on the surface of the skin and muscle tissue 91, thereby determining the entry position of the second guide tube assembly 2. Use a scalpel to cut and peel open the skin and muscle tissue 91 to establish an entry for the second guide tube assembly 2. Continue to insert the assembly 901 in the distal direction so that both guide tube assemblies 2 rest on the surface of the bone 92.

[0118] Step 4: Insert the second fixing needle 93 from the inner cavity of the second guide tube assembly 2, and use a power tool to drive the second fixing needle 93 into the bone 92, as shown in FIG. Figure 15b As shown, the assembly 901 is then pulled out to complete the installation of the second fixing needle 93.

[0119] Step 5: Insert the third guide tube assembly 2 into the third through-hole 10 of the base 1 and rotate and lock to form an assembled connection, forming the assembly 902. Slide the first and second guide tube assemblies 2 of the assembly 902 over the first and second fixing pins 93 and move distally until the third guide tube assembly 2 rests on the surface of the skin and muscle tissue 91, thereby determining the entry position for the third guide tube assembly 2. Use a scalpel to cut and peel open the skin and muscle tissue 91 to establish the entry position for the third guide tube assembly 2. Continue inserting the assembly 902 distally until all three guide tube assemblies 2 rest on the surface of the bone 92.

[0120] Step 6: Insert the third fixing needle 93 from the inner cavity of the third guide tube assembly 2, and use a power tool to drive the third fixing needle 93 into the bone 92, as shown in FIG. Figure 15cAs shown, the assembly 902 is then pulled out to complete the installation of the third fixing needle 93.

[0121] It can be understood that for a guide including a larger number of through holes 10 , the above steps 5 and 6 can be understood and performed with reference to achieve the installation of a larger number of fixing needles 93 .

[0122] Therefore, by configuring the guide tube assembly 2 to be detachable, the guide tube assembly 2 can be removed and used alone during use, avoiding the obstruction of the remaining guide tube assemblies 2 against the skin and muscle tissue 91, so that each guide tube assembly 2 can deeply incise the skin and muscle tissue 91, and can protect the skin and muscle tissue 91 from damage during the installation of the fixing needle 93.

[0123] [Example 2]

[0124] The guide of the second embodiment of the present invention is basically the same as the guide of the first embodiment, and the same parts will not be described again. Only the differences will be described below.

[0125] In the second embodiment, the arrangement of the first connection structure and the second connection structure is different from that of the first embodiment. Figures 4a to 6c The first connection structure includes an external thread 241, and the second connection structure includes an internal thread 121. The guide tube assembly 2 is configured to rotate about its own axis to drive the external thread 241 to connect or disconnect with the internal thread 121. The external thread 241 and the internal thread 121 are compatible threads. When the guide tube assembly 2 rotates about its own axis, the external thread 241 can connect or disconnect with the internal thread 121. When the external thread 241 and the internal thread 121 are connected, the relative position of the guide tube assembly 2 and the base 1 can be restricted.

[0126] In an alternative embodiment, the guide tube assembly 2 includes a guide tube body 20 and a shoulder 24 disposed on the outer periphery of the guide tube body 20, with external threads 241 disposed on the shoulder 24. The base 1 includes a retaining groove 12 located at the axial end of the through hole 10, with internal threads 121 disposed on the retaining groove 12. The structure of the guide tube body 20 can be the same as or similar to that of the guide tube body 20 of the first embodiment. Please refer to the first embodiment and will not be repeated here.

[0127] The retaining groove 12 can be a circular open cavity recessed into the base 1, with one axial end coaxially connected to the through hole 10 and the other end open to the outside. Preferably, the internal thread 121 is formed on the inner circumferential wall of the retaining groove 12. The shoulder 24 is generally disc-shaped, and the external thread 241 is formed on the outer circumferential wall of the shoulder 24.

[0128] Optionally, the guide tube assembly 2 of the second embodiment may also include a rib plate 23. The specific structure and installation principle of the rib plate 23 can refer to the first embodiment. Preferably, the rib plate 23 is provided on the proximal side of the shoulder 24, that is, the rib plate 23 is located on the side of the shoulder 24 away from the guide tube body 20 that penetrates the penetration hole 10, to facilitate operation.

[0129] Optionally, the first connection structure includes a fifth limiting surface 242, which is perpendicular to the axial direction of the guide tube body 20; the base 1 includes a sixth limiting surface 122, which is perpendicular to the axial direction of the through-hole 10; the fifth limiting surface 242 is configured to abut against the sixth limiting surface 122. The fifth limiting surface 242 and the sixth limiting surface 122 abut against each other to limit the axial position of the guide tube assembly 2 relative to the base 1, thereby preventing the guide tube assembly 2 from being screwed in too deeply.

[0130] In an alternative exemplary embodiment, the fifth limiting surface 242 is provided on the shaft shoulder 24, and the sixth limiting surface 122 is provided on the bottom surface of the limiting groove 12. Furthermore, a limiting groove 12 is provided at each axial end of the through hole 10. With such a configuration, the front and back sides of the base 1 along the axial direction are equivalent, and the operator does not need to distinguish between the front and back sides of the base 1, which facilitates operation during surgery. Of course, it is understandable that in some other embodiments, the front and back sides of the base 1 can be distinguished along the axial direction, and the base 1 only includes one limiting groove 12. With such a configuration, the operator must insert the guide tube assembly 2 into the through hole 10 along a fixed direction. In some other embodiments, the sixth limiting surface 122 can also be directly provided on the base 1, and does not have to be provided in the limiting groove 12. The fifth limiting surface 242 can also be provided on other structures instead of on the shaft shoulder 24, and the present invention is not limited to this.

[0131] In the second embodiment, since the threaded connection can limit the movement of the guide tube assembly 2 in two axial directions along the through hole 10, only a set of relative internal and external threads is required to limit the relative position of the guide tube assembly 2 and the base 1, which has a simple structure and is easy to use.

[0132] Optionally, in the second embodiment, ribs 23 and rotation limiting grooves 131 with certain deformation capabilities may be provided as in the first embodiment, and the details will not be repeated here.

[0133] [Example 3]

[0134] The guide of the third embodiment of the present invention is basically the same as the guide of the second embodiment, and the same parts will not be described again. Only the differences will be described below.

[0135] In this embodiment 3, the structure of the guide tube assembly 2 is different from that of the guide tube assembly 2 of the embodiment 2. The structure of the base 1 can be the same or similar to that of the base 1 of the embodiment 2. Figures 7a to 9c When the guide tube assembly 2 passes through the penetration hole 2 from one end of the penetration hole 10 and is assembled and connected with the base 1 , the guide tube assembly 2 does not extend beyond the other end of the penetration hole 10 .

[0136] In an alternative embodiment, the rib 23 is positioned differently from the second embodiment. Specifically, the rib 23 is positioned distally from the shoulder 24, that is, on the side of the shoulder 24 closest to the guide tube body 20's insertion hole 10. This allows the rib 23 to avoid obstructing the proximal end of the guide tube assembly 2 from entering the hole 10.

[0137] Optionally, the axial distance between the proximal end of the guide tube body 10 and the shaft shoulder 24 is adapted to the axial length of the through hole 10 .

[0138] In both Examples 1 and 2, the guide tube assembly 2 is assembled and connected to the base 1 by inserting its distal end into the perforation 10. In contrast, in Example 3, the guide tube assembly 2 is assembled and connected to the base 1 by inserting its proximal end into the perforation 10, ensuring that the proximal end of the guide tube assembly 2 does not protrude from the base 1. This configuration eliminates protruding structures on the proximal surface of the base 1, allowing the proximal surface of the base 1 to function as a support, facilitating operation.

[0139] [Example 4]

[0140] The guide of the fourth embodiment of the present invention is basically the same as the guide of the first embodiment. The same parts will not be described again. Only the differences will be described below.

[0141] In the fourth embodiment, the structure of the guide tube assembly 2 is different from that of the guide tube assembly 2 of the first embodiment. The structure of the base 1 can be the same or similar to that of the base 1 of the first embodiment. Figures 9a to 11c When the guide tube assembly 2 passes through the penetration hole 2 from one end of the penetration hole 10 and is assembled and connected with the base 1 , the guide tube assembly 2 does not extend beyond the other end of the penetration hole 10 .

[0142] In an alternative example, the shoulder 22 is provided at the proximal end of the guide tube body 20 , and the rib 23 is provided on a side of the limiting wedge block 21 away from the shoulder 22 , that is, the rib 23 is provided on the distal end of the limiting wedge block 21 .

[0143] Similar to the third embodiment, the guide tube assembly 2 is assembled and connected to the base 1 by inserting the proximal end into the through hole 10, ensuring that the proximal end of the guide tube assembly 2 does not protrude from the base 1. With this configuration, the proximal surface of the base 1 can have no protruding structures, and the proximal surface of the base 1 can also serve as a support, facilitating operation.

[0144] [Example 5]

[0145] The guide of the fifth embodiment of the present invention is basically the same as the guide of the first embodiment. The same parts will not be described again. Only the differences will be described below.

[0146] In this fifth embodiment, the structure of the guide tube assembly 2 is different from that of the guide tube assembly 2 in the first embodiment. The arrangement of the first connection structure and the second connection structure is different from that in the first embodiment. The first connection structure and the second connection structure include magnetic connection structures. Specifically, in an exemplary embodiment, please refer to Figures 11a to 13c The first connection structure includes a magnet 3, and the second connection structure can be attracted to the magnet 3. It is understood that in some other embodiments, the magnetic connection structure can also be achieved by the first connection structure and the second connection structure being attracted to an additional magnet, and those skilled in the art can configure it according to existing technologies.

[0147] The magnetic connection makes it very convenient to assemble and disassemble the guide tube assembly 2 and the base 1. As long as the guide tube assembly 2 and the base 1 are aligned, they will automatically engage and lock. When disassembling, the guide tube assembly 2 can be separated from the base 1 by simply overcoming the attraction of the magnet 3.

[0148] In an alternative exemplary embodiment, the guide tube assembly 2 includes a guide tube body 20 and a shoulder 25 arranged on the outer periphery of the guide tube body 20, and the base 1 includes a limiting groove 13 located at the axial end of the through hole 10, and the limiting groove 13 is used to accommodate the shoulder 25; at least one of the shoulder 25 and the limiting groove 13 includes a magnet 3, and the other can be attracted to the magnet 3.

[0149] Please refer to Figures 11a to 13c , the following description is made by taking the limiting groove 13 including the magnet 3 and the shaft shoulder 25 being able to be attracted to the magnet 3 as an example.

[0150] The magnet 3 can be a permanent magnet, such as a magnet, that possesses a certain magnetic field strength. In one exemplary embodiment, an annular magnet 3 is disposed at the bottom wall of the retaining groove 13. The shoulder 25 can be attracted to the magnet 3 by virtue of the shoulder 25 comprising a magnet having a polarity opposite to that of the magnet 3, or a ferromagnetic member, such as iron or nickel, that is attracted to the magnet 3. With this configuration, the shoulder 25 can be attracted to the magnet 3.

[0151] It is understandable that in other embodiments, the magnet 3 may be provided on the shaft shoulder 25, such as Figure 14a and Figure 14b As shown, the limiting groove 13 can be adapted to be provided with a magnet with a polarity opposite to that of the magnet 3 , or a ferromagnetic member that can be attracted by the magnet 3 .

[0152] Preferably, the guide tube assembly 2 includes ribs 23 disposed on the outer periphery of the guide tube body 20, and the ribs 23 extend axially along the guide tube body 20. The base 1 includes rotation-limiting grooves 131, and the ribs 23 are adapted to be inserted into the rotation-limiting grooves 131, so that the guide tube assembly 2 is restricted from circumferential rotation by the rotation-limiting grooves 131. The rotation-limiting grooves 131 can be provided on the inner circumferential wall of the limiting groove 13 along the axial direction of the limiting groove 13, and the number and distribution of the ribs 23 can be adapted to the number and distribution of the ribs 23.

[0153] The setting of the rotation limiting groove 131 can limit the circumferential rotation of the guide tube assembly 2 relative to the base 1. Combined with the magnetic connection structure, it can improve the stability of the assembly connection between the guide tube assembly 2 and the base 1.

[0154] Preferably, the rib 23 is disposed on the distal side of the shoulder 25, that is, the rib 23 is located on the side of the shoulder 25 proximal to the hole 10 through which the guide tube body 20 penetrates. Furthermore, the radial width of the rib 23 is greater than the radial width of the shoulder 25, that is, the rib 23 protrudes radially beyond the shoulder 25 to facilitate insertion into the rotation-limiting groove 131. In particular, in this fifth embodiment, the rib 23 is prevented from circumferentially rotating with the base 1, and thus the rib 23 can be made of a hard material.

[0155] In summary, the guide provided by the present invention includes: a base and two or more guide tube assemblies; the base has two or more through-holes, the guide tube assembly is used to be detachably inserted into the through-holes and assembled and connected with the base, and each through-hole is only for one guide tube assembly to be inserted; wherein, the guide tube assembly includes a first connection structure, and the base includes a second connection structure, and the first connection structure and the second connection structure are used to be adaptively connected to limit the relative position of the guide tube assembly and the base when the guide tube assembly is assembled and connected with the base. In this configuration, by configuring the guide tube assembly to be detachable, the guide tube assembly can be removed and used separately during use, avoiding the abutment and obstruction of the remaining guide tube assemblies with the skin and muscle tissue, so that each guide tube assembly can penetrate deeply into the incised skin and muscle tissue, and can protect the skin and muscle tissue from damage during the installation of the fixing needle.

[0156] It should be noted that the above embodiments can be combined with each other. The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure are within the scope of protection of the claims.

Claims

1. A guide device used in orthopedic robotic surgery, characterized in that: include: a base and two or more guide tube assemblies; The base has two or more through-going through-holes, the guide tube assembly is used to be detachably inserted into the through-holes and assembled and connected to the base, and each through-hole is only for one guide tube assembly to pass through; The guide tube assembly includes a first connection structure, and the base includes a second connection structure, wherein the first connection structure and the second connection structure are adapted to be connected to each other so as to limit the relative position of the guide tube assembly and the base when the guide tube assembly and the base are assembled and connected; The first connection structure includes a first limiting surface and a third limiting surface, the first limiting surface is at an angle to the axial direction of the guide tube assembly; the third limiting surface is perpendicular to the axial direction of the guide tube body, and the third limiting surface is arranged opposite to the first limiting surface; the second connection structure includes a second limiting surface and a fourth limiting surface, the second limiting surface is at an angle to the axial direction of the through hole; the fourth limiting surface is perpendicular to the axial direction of the through hole; the third limiting surface is used to abut against the fourth limiting surface.

2. The guide according to claim 1, characterized in that The first connection structure and the second connection structure include mechanical connection structures, and / or the first connection structure and the second connection structure include magnetic connection structures.

3. The guide according to claim 2, characterized in that The guide tube assembly is used to rotate around its own axis to drive the first limiting surface and the second limiting surface to abut against or separate from each other.

4. The guide according to claim 3, characterized in that The guide tube assembly includes a guide tube body and a limiting wedge block arranged on the periphery of the guide tube body, and the first limiting surface is arranged on the limiting wedge block.

5. The guide according to claim 4, characterized in that The guide tube assembly includes more than two limiting wedge blocks, and the two or more limiting wedge blocks are evenly distributed around the outer circumference of the guide tube assembly; the second connecting structure includes more than two second limiting surfaces, and the two or more second limiting surfaces are evenly distributed around the central axis of the through hole.

6. The guide according to claim 4, characterized in that The guide tube assembly includes a shoulder arranged on the outer periphery of the guide tube body, and the shoulder is arranged at intervals with the limiting wedge block along the axial direction of the guide tube body; the third limiting surface is arranged on the shoulder; the base includes a limiting groove located at the axial end of the through hole, and the fourth limiting surface is arranged on the bottom surface of the limiting groove.

7. The guide according to claim 1, characterized in that The base includes a boss protruding radially inward and formed in the through hole, and the boss includes two end faces arranged along the axial direction of the through hole, and each of the end faces is provided with the second limiting surface and the fourth limiting surface, the first limiting surface is used to abut against the second limiting surface on one of the end faces, and the third limiting surface is used to abut against the fourth limiting surface on the other end face.

8. The guide according to claim 7, characterized in that The first connection structure includes the outer peripheral wall of the guide tube body, and the second connection structure includes the inner side wall of the boss. The inner side wall of the boss is used to abut against the outer peripheral wall of the guide tube body to limit the radial position of the guide tube body.

9. The guide according to claim 1, wherein: The first connection structure includes a magnet, and the second connection structure can be attracted to the magnet.

10. The guide according to claim 9, characterized in that The guide tube assembly includes a guide tube body and a shoulder arranged on the outer periphery of the guide tube body, the base includes a limiting groove located at the axial end of the through hole, and the limiting groove is used to accommodate the shoulder; at least one of the shoulder and the limiting groove includes the magnet, and the other can be attracted to the magnet.

11. The guide according to any one of claims 1, characterized in that: The guide tube assembly includes a rib plate provided on the outer periphery of the guide tube body, and the rib plate extends along the axial direction of the guide tube body.

12. The guide according to claim 1, wherein: When the guide tube assembly is inserted into the through hole from one end of the through hole and is assembled and connected with the base, the guide tube assembly does not extend beyond the other end of the through hole.

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