Intramedullary nail near-end aiming and fixing device and intramedullary nail aiming and fixing system

Abstract

The utility model provides an intramedullary nail near-end aiming and fixing device and an intramedullary nail aiming and fixing system. The aiming fixing device comprises a near-end positioning frame, a near-end aiming arm, a cylinder locking piece and a guide sleeve. The near-end aiming arm and the intramedullary nail are connected to a first connecting part and a second connecting part which are oppositely arranged on the near-end positioning frame respectively, the near-end aiming arm and the intramedullary nail are arranged in a spaced mode in the preset direction, and a near-end positioning hole is formed in the near-end aiming arm; the guide sleeve is arranged in the near-end positioning hole in a penetrating mode, the cylinder locking piece is arranged at the position, provided with the near-end positioning hole, of the near-end aiming arm, the cylinder locking piece is provided with a locking part, in the locking state, the locking part of the cylinder locking piece abuts against the outer wall face of the guide sleeve, and in the unlocking state, the locking part of the cylinder locking piece is disengaged from the guide sleeve. The aiming fixing device can provide a stable guide channel for drilling and aiming, the position of the guide sleeve is convenient to adjust, and the aiming fixing device has the advantages of improving positioning accuracy and operation convenience.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an aiming and fixing device for the proximal end of an intramedullary nail and an aiming and fixing system for an intramedullary nail having the aiming and fixing device for the proximal end of the intramedullary nail. Background Technology

[0002] Intramedullary nails are commonly used internal fixation devices for fractures of the humerus, femur, and tibia. A typical intramedullary nail structure includes a nail rod and locking screws, with locking holes at the proximal and distal ends of the nail rod for the locking screws to pass through. Depending on the type of femoral fracture, three main types of intramedullary nails are used: femoral intramedullary nails, femoral gamma nails, and femoral reconstruction nails. During use, the intramedullary nail is first inserted into the medullary cavity. A hole is drilled at the bone end of the surgical incision using a specialized tool. Then, locking screws are used to fix the nail by passing through the bone wall and the locking holes of the nail rod on both sides above and below the fracture site.

[0003] During the operation, the drill bit is inserted into the guide sleeve and positioned by the guide sleeve. After drilling is completed, the drill bit needs to be pulled out of the guide sleeve. When the drill bit is inserted into or removed from the guide sleeve, it is very easy to touch the guide sleeve, causing the guide sleeve to shake. The central axis of the guide sleeve is misaligned with the central axis of the locking hole, resulting in poor positioning accuracy of the guide sleeve. This, in turn, affects the fixing efficiency of the locking screw on the intramedullary nail and reduces the efficiency of the operation. Utility Model Content

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide an aiming and fixing device for the proximal end of an intramedullary nail. This aiming and fixing device has the advantages of improving drilling accuracy and ease of operation.

[0005] An embodiment of this utility model also proposes an aiming and fixing system for intramedullary nails.

[0006] The intramedullary nail of this utility model embodiment has a proximal locking hole and a distal locking hole. The aiming and fixing device of the proximal end of the intramedullary nail includes a proximal positioning frame, a proximal aiming arm, a locking sleeve, and a guide sleeve.

[0007] The proximal positioning frame has a first connecting portion and a second connecting portion arranged opposite to each other; the proximal aiming arm and the intramedullary nail are respectively connected to the first connecting portion and the second connecting portion, and the proximal aiming arm and the intramedullary nail are spaced apart along the preset direction. The proximal aiming arm is provided with a proximal positioning hole; the guide sleeve passes through the proximal positioning hole, the center extension line of the guide sleeve is collinear with the center axis of the proximal locking hole, the locking member is disposed at the position of the proximal aiming arm having the proximal positioning hole, the locking member has a convertible locked state and an unlocked state, the locking member has a locking portion, in the locked state, the locking portion of the locking member extends into the proximal positioning hole and abuts against the outer wall surface of the guide sleeve, in the unlocked state, the locking portion of the locking member disengages from the guide sleeve.

[0008] The aiming and fixing device for the proximal end of the intramedullary nail in this embodiment of the invention uses a locking sleeve to lock the guide sleeve. This locking mechanism, achieved through frictional contact, provides a guiding channel for the nail and drill bit, ensuring precise positioning for the intramedullary nail installation and preventing inaccurate drilling due to sleeve movement during and after drilling. Therefore, this aiming and fixing device improves operational convenience and accuracy, and also increases surgical efficiency.

[0009] Furthermore, due to variations in bone density during surgery, if the end of the guide sleeve fails to abut against the bone surface, it can be unlocked via the locking mechanism, allowing for rapid adjustment of the guide sleeve's position. Moreover, the locking mechanism can lock the guide sleeve at any position. Thus, this aiming and fixing device further enhances operational convenience.

[0010] The aiming and fixing device for the proximal end of the intramedullary nail according to this embodiment of the invention has the advantages of improving drilling accuracy and ease of operation.

[0011] In some embodiments, the locking sleeve includes a locking screw and a torque member. The locking screw is rotatably mounted on the proximal aiming arm and has a locking portion. The two ends of the torque member abut against the locking screw and the proximal aiming arm, respectively. In the natural state of the torque member, the locking portion of the locking sleeve abuts against the outer wall surface of the guide sleeve.

[0012] In some embodiments, the locking mechanism includes a locking knob, a rotating shaft, and a limiting ring. The rotating shaft is rotatably threaded onto the proximal aiming arm, with both ends of the rotating shaft extending beyond the proximal aiming arm. The locking knob is fixed to both ends of the rotating shaft. The rotating shaft has the locking portion. The limiting ring is engaged with the rotating shaft. Both the limiting ring and the proximal aiming arm have limiting holes. One end of the torque member passes through the limiting holes of the limiting ring and the proximal aiming arm.

[0013] In some embodiments, the locking portion is a protrusion extending beyond the pivot, or a clearance notch is provided on a portion of the pivot in the circumferential direction to form the locking portion on another portion of the pivot in the circumferential direction.

[0014] In some embodiments, the aiming and fixing device for the proximal end of the intramedullary nail further includes a locking member, and the proximal aiming arm and the proximal positioning frame are detachably connected via the locking member.

[0015] In some embodiments, the locking element includes a locking nut that is threaded onto the proximal end of the proximal aiming arm and the proximal positioning frame.

[0016] In some embodiments, the locking element includes a cylindrical pin and a polygonal pin, which engage with the proximal end of the proximal aiming arm and the proximal positioning frame.

[0017] In some embodiments, the proximal positioning frame includes a U-shaped frame and a gripper disposed on the U-shaped frame. The two ends of the U-shaped frame form the first connecting portion and the second connecting portion. The bottom of the U-shaped frame has multiple mounting points, and the gripper can be switchedly disposed on different mounting points.

[0018] In some embodiments, there are multiple proximal positioning holes, including the positioning straight hole and / or the positioning oblique hole.

[0019] In some embodiments, each mounting point is an inclined groove formed on the U-shaped frame, and the gripper is slidably fitted into the inclined groove. The inclined grooves of different mounting points have different inclination angles to generate striking forces in different directions.

[0020] In some embodiments, the angle between the tilt angle of each tilted groove and the preset direction is 20°-40°.

[0021] The intramedullary nail aiming and fixing system of this utility model embodiment includes a distal positioning member, a drill, and an aiming and fixing device for the proximal end of the intramedullary nail according to any one of the above. One end of the distal positioning member is alternatively connected to the first connecting part of the proximal positioning frame, and the other end of the distal positioning member can contact the distal end of the intramedullary nail. The drill is inserted into the guide sleeve to drill a fixing hole in the bone.

[0022] In some embodiments, the drill includes a drill rod and a limiter. The drill has a scale, and the limiter is slidably and lockably disposed on the scaled area of ​​the drill rod. The limiter has a control button with a locked state and an unlocked state. In the locked state, the limiter is locked to the drill rod, and in the unlocked state, the limiter is slidably connected to the drill rod.

[0023] In some embodiments, both the drill and the guide sleeve have mating indicator marks to enable quick mating and installation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the intramedullary nail implanted according to an embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the aiming and fixing system of the intramedullary nail and its cooperation with the intramedullary nail according to an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the structure of the near-end aiming arm and locking cylinder in an embodiment of this utility model.

[0027] Figure 4 This is a schematic diagram of the structure of the near-end aiming arm and the locking cylinder in an embodiment of the present invention.

[0028] Figure 5 This is a structural schematic diagram of the lock cylinder component according to an embodiment of the present utility model.

[0029] Figure 6 This is an exploded view of the lock cylinder component according to an embodiment of the present utility model.

[0030] Figure 7 This is a schematic diagram of the engagement of the rotating shaft, torque component, and limiting ring of the locking cylinder component according to an embodiment of this utility model.

[0031] Figure 8 This is a partial schematic diagram of the proximal aiming arm according to an embodiment of the present invention.

[0032] Figure 9 This is a schematic diagram of the proximal positioning frame according to an embodiment of the present utility model.

[0033] Figure 10This is a partial schematic diagram of the proximal positioning frame according to an embodiment of the present invention.

[0034] Figure 11 This is a schematic diagram of the drill bit and guide sleeve working together according to an embodiment of the present invention.

[0035] Figure 12 This is another schematic diagram of the drill and guide sleeve in an embodiment of the present invention.

[0036] Figure 13 This is a front view of the drill bit according to an embodiment of the present utility model.

[0037] Figure label:

[0038] Aiming and fixing device 100;

[0039] Locking pin 200;

[0040] Drill tool 300; Scale 301; Drill rod 302; Limiter 303;

[0041] Intramedullary nail 400; proximal locking hole 401; distal locking hole 402;

[0042] Proximal positioning frame 1; U-shaped frame 11; inclined slide 111; first connecting part 112; second connecting part 113; gripper 12;

[0043] Proximal aiming arm 2; Proximal positioning hole 21;

[0044] Lock cylinder component 3; locking screw component 31; locking knob 311; rotating shaft 312; clearance notch 3121; limit retaining ring 313; torque component 32;

[0045] Guide sleeve 4;

[0046] Locking component 5; locking nut 51; cylindrical pin 52; polygonal pin 53. Detailed Implementation

[0047] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0048] The following is for reference. Figures 1-13 This invention describes an aiming and fixing device 100 for the proximal end of an intramedullary nail and an aiming and fixing system for the intramedullary nail, according to embodiments of the present invention.

[0049] The intramedullary nail 400 of this embodiment is an aiming and fixing device 100 for the proximal end of an intramedullary nail. The intramedullary nail 400 has a proximal locking hole 401 and a distal locking hole 402. The aiming and fixing device 100 includes a proximal positioning frame 1, a proximal aiming arm 2, a locking sleeve 3, and a guide sleeve 4.

[0050] The proximal positioning frame 1 has a first connecting portion 112 and a second connecting portion 113 arranged opposite to each other along a preset direction. The proximal aiming arm 2 and the intramedullary nail 400 are respectively connected to the first connecting portion 112 and the second connecting portion 113 respectively, and the proximal aiming arm 2 and the intramedullary nail 400 are arranged along a preset direction ( Figure 2 The vertical direction shown can be understood as the internal and external direction of the human body. The proximal aiming arm 2 is provided with a proximal positioning hole 21. The guide sleeve 4 passes through the proximal positioning hole 21. The center extension line of the guide sleeve 4 is collinear with the center axis of the proximal locking hole 401. The locking sleeve 3 is provided at the position of the proximal aiming arm 2 with the proximal positioning hole 21. The locking sleeve 3 has a convertible locked state and an unlocked state. The locking sleeve 3 has a locking part. In the locked state, the locking part of the locking sleeve 3 extends into the proximal positioning hole 21 and abuts against the outer wall surface of the guide sleeve 4. In the unlocked state, the locking part of the locking sleeve 3 is disengaged from the guide sleeve 4.

[0051] The aiming and fixing device 100 for the proximal end of the intramedullary nail in this embodiment of the invention uses a locking sleeve 3 to lock the guide sleeve 4. This locking mechanism, achieved through frictional contact, provides a guiding channel for the locking nail 200 and the drill bit 300, ensuring precise positioning for the installation and locking of the intramedullary nail 400. This prevents the guide sleeve 4 from wobbling during and after drilling, which could lead to poor drilling accuracy. Therefore, this aiming and fixing device 100 improves the convenience and accuracy of operation, thereby increasing surgical efficiency.

[0052] Furthermore, due to variations in bone density during surgery, if the end of the guide sleeve 4 fails to abut against the bone surface, it can be unlocked through the engagement of the locking sleeve 3 and the guide sleeve 4, allowing for rapid adjustment of the guide sleeve 4's position. Moreover, the locking sleeve 3 can lock the guide sleeve 4 to any position. Thus, the aiming and fixing device 100 further enhances operational convenience.

[0053] The aiming and fixing device 100 for the proximal end of the intramedullary nail according to this embodiment of the present invention has the advantages of improving drilling accuracy and ease of operation.

[0054] like Figures 4 to 7 As shown, the locking cylinder 3 includes a locking screw 31 and a torque member 32. The locking screw 31 is rotatably mounted on the proximal aiming arm 2 and has a locking part. The two ends of the torque member 32 abut against the locking screw 31 and the proximal aiming arm 2, respectively. In the natural state of the torque member 32, the locking part of the locking cylinder 3 abuts against the outer wall surface of the guide sleeve 4.

[0055] The intramedullary nail proximal aiming and fixing device 100 of this utility model divides the locking cylinder 3 into a locking screw 31 and a torque member 32. The locking screw 31 is rotatably mounted on the proximal aiming arm 2. The two ends of the torque member 32 abut against the locking screw 31 and the proximal aiming arm 2, respectively. During the rotation of the locking screw 31, potential energy can be accumulated in the torque member 32. When no force is applied, the torque member 32 can return to its natural state. In the natural state of the torque member 32, the locking screw 31 locks the guide sleeve 4. Therefore, the aiming and fixing device 100 has the advantage of high ease of operation.

[0056] Optionally, the torsion member 32 can be a torsion spring, with its two ends abutting against the locking screw 31 and the proximal aiming arm 2, respectively, so that it automatically resets after the torsion spring is de-stressed. Thus, the intramedullary nail proximal aiming and fixing device 100 has the advantage of simple structure.

[0057] like Figures 4 to 7 As shown, the locking knob 31 includes a locking knob 311, a rotating shaft 312, and a limiting ring 313. The rotating shaft 312 is rotatably mounted on the proximal aiming arm 2, and both ends of the rotating shaft 312 extend out of the proximal aiming arm 2. The locking knob 311 is fixed on both ends of the rotating shaft 312. The rotating shaft 312 has a locking part. The limiting ring 313 is locked on the rotating shaft 312. The limiting ring 313 and the proximal aiming arm 2 have limiting holes. One end of the torque member 32 passes through the limiting ring 313 and the limiting hole of the proximal aiming arm 2.

[0058] The intramedullary nail proximal aiming and fixing device 100 of this embodiment of the invention comprises a locking knob 311, a rotating shaft 312, and a limiting ring 313, with the limiting ring 313 engaged on the rotating shaft 312. One end of a torque member 32 passes through a limiting hole on the limiting ring 313. During installation, the torque member 32 is fitted onto the rotating shaft 312, which is then threaded onto the proximal aiming arm 2. After the locking knob 311 is installed at the end of the rotating shaft 312, one end of the torque member 32 passes through the limiting hole of the limiting ring 313. Thus, the aiming and fixing device 100 improves the ease of installation.

[0059] Optionally, the central axis of the rotating shaft 312 is set perpendicular to the length direction of the proximal aiming arm 2.

[0060] Optionally, the end of the rotating shaft 312 is located in the rectangular rod section, and the middle part of the rotating shaft 312 is cylindrical.

[0061] Furthermore, such as Figures 4 to 7 As shown, an clearance notch 3121 is provided on the upper circumferential part of the rotating shaft 312 to form a locking part on the other circumferential part of the rotating shaft 312. In the locked state, the locking part extends into the proximal positioning hole 21.

[0062] The aiming and fixing device 100 for the proximal end of the intramedullary nail of this embodiment features a clearance notch 3121 on the upper circumferential portion of the rotating shaft 312. During installation, the clearance notch 3121 aligns with the proximal positioning hole 21, allowing the guide sleeve 4 to smoothly enter the proximal positioning hole 21. To fix the guide sleeve 4, the locking knob 311 is rotated to engage the locking part within the proximal positioning hole 21, thus locking the guide sleeve 4. Therefore, this aiming and fixing device 100 has the advantage of simple structure. Furthermore, the clearance notch 3121 does not affect the cross-sectional area of ​​the rotating shaft 312 and does not interfere with the installation of the rotating shaft 312 and the proximal aiming arm 2, improving the ease of installation.

[0063] This invention is not limited to this embodiment. For example, in other embodiments, the locking part is a protrusion extending beyond the rotating shaft 312. Thus, the aiming fixing device 100 has the advantage of simple structure.

[0064] like Figure 2 As shown, the intramedullary nail proximal aiming and fixing device 100 of this utility model embodiment also includes a locking member 5, and the proximal aiming arm 2 and the proximal positioning frame 1 are detachably connected by the locking member 5.

[0065] The intramedullary nail proximal aiming and fixing device 100 of this embodiment allows for a detachable connection between the proximal aiming arm 2 and the proximal positioning frame 1 via a locking member 5, facilitating the subsequent installation of the distal positioning member. Furthermore, this aiming and fixing device 100 offers the advantage of high assembly efficiency.

[0066] Furthermore, the locking component 5 includes a locking nut 51, which is threaded onto the proximal end of the proximal aiming arm 2 and the proximal positioning frame 1. Thus, by using the locking nut 51 to fix the proximal aiming arm 2 and the proximal positioning frame 1, the aiming fixing device 100 has the advantage of good installation stability.

[0067] Furthermore, such as Figure 2 As shown, the locking component 5 includes a cylindrical pin 52 and a polygonal pin 53, which cooperate with the proximal end of the proximal aiming arm 2 and the proximal positioning frame 1. The intramedullary nail proximal aiming and fixing device 100 of this embodiment has relatively high precision. The cylindrical pin 52 and polygonal pin 53 enable aiming at the nail hole position, improving positioning accuracy. When fixing with multiple locking components, it is possible that after some locking holes are aligned, the later-installed locking holes may be difficult to install due to misalignment. This application, by setting the polygonal pin 53, can ensure accurate nail hole positioning while minimizing assembly jamming caused by over-positioning of the nail hole. This aiming and fixing device 100 has the advantages of reducing assembly difficulty and improving assembly efficiency.

[0068] like Figure 2 , Figure 9 and Figure 10 As shown, the proximal positioning frame 1 includes a U-shaped frame 11 and a gripper 12 disposed on the U-shaped frame 11. The two ends (the U-shapes on both sides) of the U-shaped frame 11 form a first connecting part 112 and a second connecting part 113. The bottom of the U-shaped frame 11 has multiple mounting points, and the gripper 12 can be switched to be disposed on different mounting points.

[0069] The aiming and fixing device 100 for the proximal end of the intramedullary nail in this embodiment of the present invention provides multiple mounting points on the U-shaped frame 11, allowing for different mounting positions for the holder 12. The position of the holder 12 can be switched according to different patient sites and surgical scenarios. Therefore, the aiming and fixing device 100 improves the convenience of operation and force application.

[0070] like Figure 2 , Figure 9 and Figure 10 As shown, each installation site is an inclined groove 111 formed on the U-shaped frame 11. The holder 12 can be slidably fitted into the inclined groove 111. The inclined angles of the inclined grooves 111 at different installation sites are different, so as to generate percussion forces in different directions. Thus, multiple percussion forces are provided for the implantation of the intramedullary nail 400, reducing the difficulty of implanting the intramedullary nail 400.

[0071] The angle between the tilt angle of each tilting groove 111 and the preset direction is 20°-40°.

[0072] The intramedullary nail proximal aiming and fixing device 100 of this utility model provides a better force application angle for the striking operation while reducing the force intensity during striking by setting the angle between the tilt angle of each tilting groove 111 and the preset direction to 20°-40°.

[0073] like Figure 2 As shown, there are multiple proximal positioning holes 21, including straight positioning holes and oblique positioning holes. Therefore, the position and direction of the locking screw insertion can be determined according to the location of the patient's fracture, increasing the versatility of locking screw fixation. Consequently, the intramedullary nail aiming and fixation system of this embodiment improves surgical outcomes.

[0074] The intramedullary nail aiming and fixing system of this utility model embodiment includes a distal positioning member, a drill 300, and an aiming and fixing device 100 for the proximal end of the intramedullary nail according to any one of the above. One end of the distal positioning member is alternatively connected to the first connecting part 112 of the proximal positioning frame 1, and the other end of the distal positioning member can contact the distal end of the intramedullary nail 400. The drill 300 is inserted into the guide sleeve 4 to drill a fixing hole in the bone.

[0075] The intramedullary nail aiming and fixing system of this utility model has the advantages of improving drilling accuracy and ease of operation.

[0076] like Figure 2 , Figure 11 and Figure 12 As shown, the drill bit 300 includes a drill rod 302 and a limiter 303. The drill bit 300 is provided with a scale 301. The limiter 303 is slidably and lockably disposed on the area of ​​the drill rod 302 with the scale 301. The limiter 303 is provided with a control button, which has a locked state and an unlocked state. In the locked state, the limiter 303 is locked to the drill rod 302. In the unlocked state, the limiter 303 is slidably connected to the drill rod 302.

[0077] The intramedullary nail aiming and fixing system of this utility model embodiment has a control button on the limiter 303. In the locked state, the limiter 303 is locked on the drill rod 302. At this time, the value of the scale 301 corresponding to the lower end of the limiter 303 is the length of the drill bit of the drill 300 protruding from the guide sleeve 4. This design can accurately control the drilling depth of the drill 300 and avoid unnecessary damage.

[0078] Both the drill bit 300 and the guide sleeve 4 have mating indicator marks to facilitate quick mating and installation. Furthermore, the drill rod 302 is also equipped with mating indicator marks, saving mating time and improving the ease of assembly. For example, the drill rod 302 and the guide sleeve 4 can be equipped with color rings of the same color to clearly indicate their assembly and mating relationship.

[0079] Furthermore, the drill pipe 302 can be a long drill bit structure.

[0080] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0081] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0082] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0083] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0084] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0085] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An aiming and fixing device for the proximal end of an intramedullary nail, characterized in that, The intramedullary nail has a proximal locking hole and a distal locking hole, and the aiming and fixing device includes: A proximal positioning frame, the proximal positioning frame having a first connecting portion and a second connecting portion disposed opposite to each other; The proximal aiming arm and the intramedullary nail are respectively connected to the first connecting part and the second connecting part, and the proximal aiming arm and the intramedullary nail are spaced apart along a preset direction. The proximal aiming arm is provided with a proximal positioning hole. A locking sleeve and a guide sleeve are provided. The guide sleeve passes through the proximal positioning hole, and the center extension line of the guide sleeve is collinear with the center axis of the proximal locking hole. The locking sleeve is disposed at the position where the proximal aiming arm has the proximal positioning hole. The locking sleeve has a convertible locked state and an unlocked state. The locking sleeve has a locking part. In the locked state, the locking part of the locking sleeve extends into the proximal positioning hole and abuts against the outer wall surface of the guide sleeve. In the unlocked state, the locking part of the locking sleeve disengages from the guide sleeve.

2. The aiming and fixing device for the proximal end of the intramedullary nail according to claim 1, characterized in that, The locking cylinder includes a locking screw and a torque member. The locking screw is rotatably mounted on the proximal aiming arm and has a locking portion. The two ends of the torque member abut against the locking screw and the proximal aiming arm, respectively. In the natural state of the torque member, the locking portion of the locking cylinder abuts against the outer wall surface of the guide sleeve.

3. The aiming and fixing device for the proximal end of the intramedullary nail according to claim 2, characterized in that, The locking mechanism includes a locking knob, a rotating shaft, and a limiting ring. The rotating shaft is rotatably mounted on the proximal aiming arm, with both ends of the rotating shaft extending beyond the proximal aiming arm. The locking knob is fixed to both ends of the rotating shaft. The rotating shaft has the locking portion. The limiting ring is engaged with the rotating shaft. Both the limiting ring and the proximal aiming arm have limiting holes. One end of the torque member passes through the limiting holes of the limiting ring and the proximal aiming arm.

4. The aiming and fixing device for the proximal end of the intramedullary nail according to claim 3, characterized in that, The locking part is a protrusion that extends beyond the rotating shaft, or a clearance notch is provided on a portion of the rotating shaft in the circumferential direction to form the locking part on another portion of the rotating shaft in the circumferential direction.

5. The aiming and fixing device for the proximal end of the intramedullary nail according to claim 1, characterized in that, It also includes a locking element, through which the proximal aiming arm and the proximal positioning frame are detachably connected; The locking element includes a locking nut that is threaded onto the proximal end of the proximal aiming arm and the proximal positioning frame; and / or, the locking element includes a cylindrical pin and a polygonal pin that are threaded onto the proximal end of the proximal aiming arm and the proximal positioning frame.

6. The aiming and fixing device for the proximal end of the intramedullary nail according to claim 1, characterized in that, The proximal positioning frame includes a U-shaped frame and a gripper disposed on the U-shaped frame. The two ends of the U-shaped frame form the first connecting part and the second connecting part. The bottom of the U-shaped frame has multiple mounting points, and the gripper can be switched to be disposed on different mounting points. And / or, there are multiple proximal positioning holes, including the positioning straight hole and / or the positioning oblique hole.

7. The aiming and fixing device for the proximal end of the intramedullary nail according to claim 6, characterized in that, Each of the mounting points is an inclined groove formed on the U-shaped frame. The gripper can be slidably fitted into the inclined groove. The inclined grooves of different mounting points have different inclination angles to generate striking forces in different directions.

8. The aiming and fixing device for the proximal end of the intramedullary nail according to claim 7, characterized in that, The angle between the tilt angle of each tilted groove and the preset direction is 20°-40°.

9. An intramedullary nail aiming and fixation system, characterized in that, The device includes a distal positioning element, a drill bit, and an aiming and fixing device for the proximal end of an intramedullary nail according to any one of claims 1-8, wherein one end of the distal positioning element is alternatively connected to the first connecting portion of the proximal positioning frame, and the other end of the distal positioning element is capable of contacting the distal end of the intramedullary nail, and the drill bit is inserted into the guide sleeve to drill a fixing hole in the bone.

10. The intramedullary nail aiming and fixation system according to claim 9, characterized in that, The drill includes a drill rod and a limiter. The drill has a scale. The limiter is slidably and lockably disposed on the scaled area of ​​the drill rod. The limiter is provided with a control button. The control button has a locked state and an unlocked state. In the locked state, the limiter is locked to the drill rod. In the unlocked state, the limiter is slidably connected to the drill rod. And / or, both the drill and the guide sleeve have mating indicator marks to enable quick mating and installation.

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