An intramedullary nail aiming jig

Abstract

The application provides an intramedullary nail aiming frame, which comprises a handle, an aiming assembly and a guide assembly; the handle has a first distal end and a second distal end, the second distal end is used for connecting an intramedullary nail; the aiming assembly is connected with the first distal end; the guide assembly comprises a guide body and a guide wheel, the guide body is arranged on the aiming assembly and can move along the extension direction of the aiming assembly, the guide wheel is rotatably arranged on the guide body, the guide wheel is provided with a guide hole facing the intramedullary nail along the radial direction of the guide wheel, and the guide hole is used for fixing a screw sleeve. The intramedullary nail aiming frame provided by the application has high flexibility, the guide body is movably arranged on the aiming assembly, and the guide wheel rotates on the guide body, so that the intramedullary nail aiming frame can freely adjust the angle and distance according to the operation requirement, adapts to the bone structure of different patients and the operation requirement, greatly improves the flexibility and adaptability of the operation, and reduces the operation risk.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an intramedullary nail aiming frame. Background Technology

[0002] In clinical medicine, intramedullary nailing is a common treatment method for fractures. From a technical perspective, the main advantages of intramedullary nailing are its minimally invasive effect on the fracture ends and the ability to apply pressure to them.

[0003] In intramedullary nailing surgery to treat fractures, the insertion and locking of screws require a targeting frame and screw cannulas. Currently, each targeting frame is only compatible with one type of intramedullary nail, and each nail has different dimensions, screw hole positions, or numbers. However, clinical surgeries sometimes require the use of multiple types of intramedullary nails. Therefore, when multiple types of intramedullary nails need to be implanted in a clinical operation, multiple targeting frames must be prepared, leading to longer preparation times, more complex surgical procedures, and increased surgical risks. Summary of the Invention

[0004] The purpose of this invention is to provide an intramedullary nail aiming frame that increases the applicability of the product, reduces surgical time, and lowers surgical risks.

[0005] To achieve the above objectives, in a first aspect, the present invention provides an intramedullary nail aiming frame, including a handle, an aiming assembly, and a guide assembly;

[0006] The handle has a first distal end and a second distal end, the second distal end being used to connect to an intramedullary nail;

[0007] The aiming component is connected to the first remote end;

[0008] The guiding assembly includes a guiding body and a guiding wheel. The guiding body is disposed on the aiming assembly and can move along the extension direction of the aiming assembly. The guiding wheel is rotatably disposed on the guiding body. The guiding wheel has a guiding hole along its radial direction facing the intramedullary nail. The guiding hole is used to fix the screw sleeve.

[0009] In some embodiments, the aiming component includes a slide rail;

[0010] The slide rail is connected to the first distal end, and the slide rail has a sliding channel along its axial direction;

[0011] The guide body is movably disposed in the sliding channel.

[0012] In some embodiments, the slide rail has a first sliding wall and a second sliding wall, the first sliding wall and the second sliding wall being arranged opposite to each other to form the sliding channel;

[0013] The guide body has a first sliding groove and a second sliding groove on its two opposite side walls, respectively. The first sliding groove slides in conjunction with the first sliding wall, and the second sliding groove slides in conjunction with the second sliding wall.

[0014] In some embodiments, the inner side of the first sliding wall is provided with a first limiting groove along its axial direction, and the inner side of the second sliding wall is provided with a second limiting groove along its axial direction.

[0015] The guide wheel has a first limiting part on one side wall and a second limiting part on the other side wall. The first limiting part slides in conjunction with the first limiting groove, and the second limiting part slides in conjunction with the second limiting groove.

[0016] In some embodiments, the guide assembly further includes a first slider and a second slider;

[0017] The first slider is connected to the first slide groove, and the second slider is connected to the second slide groove;

[0018] The outer surface of the first sliding wall and / or the second sliding wall is provided with a marking portion along its axial direction. The marking portion cooperates with the first slider and the second slider to mark the sliding distance of the guide assembly.

[0019] In some embodiments, the guide assembly further includes a positioning member, wherein one side wall of the positioning member is provided with an elastic tab and the other side wall of the positioning member is provided with a positioning protrusion;

[0020] The guide body is provided with an installation groove, and the inner sidewall of the installation groove is provided with a notch corresponding to the second sliding wall;

[0021] The inner surface of the second sliding wall is provided with a plurality of positioning holes along its axial direction;

[0022] The positioning element is disposed in the mounting groove, the elastic tab abuts against one side wall of the mounting groove, and the positioning protrusion is connected to the positioning hole through the notch;

[0023] When a force is applied to the positioning member in the direction of the elastic tab, the positioning protrusion separates from the positioning hole, and the guide assembly can move axially along the slide rail.

[0024] In some embodiments, the aiming assembly further includes a connector, the proximal end of which is detachably connected to the first distal end, and the distal end of which is detachably connected to the slide rail.

[0025] In some embodiments, the guide body has mounting holes;

[0026] The guide wheel is rotatably disposed within the mounting hole;

[0027] During aiming and positioning, the screw sleeve is inserted through the guide hole, with one end of the screw sleeve extending toward the intramedullary nail.

[0028] In some embodiments, the inner wall of the mounting hole has an internal gear, and the outer wall of the guide wheel has an external gear, wherein the internal gear and the external gear mesh.

[0029] When a torque is applied to the guide wheel, the guide wheel can rotate within the mounting hole.

[0030] In some embodiments, the guide assembly further includes a locking mechanism disposed on the guide body, the locking mechanism including a locking element;

[0031] The inner wall of the mounting hole is provided with a circumferential groove, and the locking member is movably disposed in the circumferential groove;

[0032] The outer wall of the guide wheel is provided with an external gear;

[0033] When a force is applied to the locking mechanism to engage the locking element with the external gear, the guide wheel is fixed to the guide body.

[0034] In some embodiments, the locking element is an arc-shaped slide, and the surface of the slide near the guide wheel is provided with protruding teeth;

[0035] When a force is applied to the locking mechanism, the convex tooth meshes with the external gear.

[0036] In some embodiments, the surface of the slide near the guide wheel is further provided with a sliding portion, which contacts the tooth surface of the external gear.

[0037] In some embodiments, the protrusion height of the sliding portion is the same as the protrusion height of the tooth.

[0038] In some embodiments, the sidewall of the locking member is provided with a sliding pin;

[0039] The inner wall of the circumferential groove is provided with a sliding groove, and the top of the sliding groove is inclined toward the guide wheel;

[0040] The sliding pin is slidably disposed within the sliding groove.

[0041] In some embodiments, the locking mechanism further includes a button, a rotating linkage, a first connecting pin, and a second connecting pin;

[0042] The guide body is provided with a movable groove, which is connected to the circumferential groove. The inner sidewall of the movable groove is provided with an elongated hole that extends toward the mounting hole.

[0043] The button is located within the movable slot;

[0044] One end of the rotating link is connected to the button via the first connecting pin, and the end of the first connecting pin is located in the elongated hole. The other end of the rotating link extends into the circumferential groove and is connected to the locking member.

[0045] The second connecting pin passes through the rotating link and is connected to the guide body to limit the rotation trajectory of the rotating link.

[0046] In some embodiments, the guide assembly further includes a magazine sleeve and a locking element;

[0047] The magazine sleeve passes through the guide hole and is fixedly connected to the guide body. The inner diameter of the magazine sleeve is adjustable. The screw sleeve passes through the magazine sleeve.

[0048] The locking element is located on the guide wheel and is used to fix the magazine sleeve to the guide wheel.

[0049] In some embodiments, the magazine sleeve has a plurality of grooves on its wall, the plurality of grooves being arranged in a ring at intervals and extending to one end of the magazine sleeve, so that the wall of the magazine sleeve forms a plurality of arc-shaped portions.

[0050] In some embodiments, the guide body has a first notch and a second notch, the first notch and the second notch are located on opposite sides of the mounting hole and are both connected to the mounting hole.

[0051] In some embodiments, the first notch and the second notch have the same length, and the lengths of both the first notch and the second notch are greater than the radius of the mounting hole and less than the diameter of the mounting hole.

[0052] In some embodiments, the guide body is further provided with an aiming hole for aiming at the tail end hole of the intramedullary nail.

[0053] In some embodiments, the handle includes a first handle and a second handle that are detachably connected, wherein the distal end of the first handle is the first distal end and the distal end of the second handle is the second distal end.

[0054] The intramedullary nail aiming frame provided by this invention has at least one of the following beneficial effects:

[0055] 1. By setting the guide body movable on the aiming assembly, and the guide wheel can rotate freely on the guide body, the flexibility is high. This allows the intramedullary nail aiming frame to freely adjust the angle and distance according to the needs of the operation, adapting to the bone structure and surgical requirements of different patients. This greatly improves the flexibility and adaptability of the operation and reduces the risk of the operation.

[0056] 2. The intramedullary nail aiming frame provided by this invention has high precision, enabling doctors to more accurately locate the implantation position of the intramedullary nail, reduce surgical errors, and improve the success rate of surgery.

[0057] 3. The intramedullary nail aiming device provided by this invention has strong versatility and is compatible with multiple types of intramedullary nails, making the aiming device suitable for various surgical scenarios and patient needs, thus improving the practicality and versatility of the aiming device.

[0058] 4. Reduced costs: Hospitals can reduce the procurement and storage costs of different types of aiming frames, thereby improving economic efficiency. Attached Figure Description

[0059] Figure 1 This is a schematic diagram of the structure of the intramedullary nail aiming frame provided by the present invention;

[0060] Figure 2 A schematic diagram of the structure of the guide component provided in the embodiment of the present invention;

[0061] Figure 3 A schematic diagram of the structure of the guide body provided in the embodiments of the present invention;

[0062] Figure 4 This is a schematic diagram of the structure of the magazine sleeve and guide wheel after assembly according to an embodiment of the present invention;

[0063] Figure 5 A schematic diagram of the assembled structure of the magazine sleeve, guide wheel, positioning component and guide body according to an embodiment of the present invention;

[0064] Figure 6 This is a schematic diagram of the structure of the magazine sleeve provided by the present invention;

[0065] Figure 7 This is a schematic diagram of the slide rail structure provided in an embodiment of the present invention;

[0066] Figure 8 This is a schematic diagram of the positioning component provided in an embodiment of the present invention;

[0067] Figure 9 This is a schematic diagram of the structure of the connector provided in an embodiment of the present invention;

[0068] Figure 10 A top view of the first handle provided in the embodiment of the present invention;

[0069] Figure 11 This is a schematic diagram of the structure of the guide body in the second embodiment of the present invention;

[0070] Figure 12 A top view and a cross-sectional view along AA of the guide body of the second embodiment of the present invention;

[0071] Figure 13 for Figure 12 Enlarged view of point B in the middle;

[0072] Figure 14 This is a schematic diagram of the locking mechanism provided in an embodiment of the present invention.

[0073] Figure label:

[0074] Handle 1, First Handle 11, Second Handle 12, First Distal End 111, Second Distal End 112, Hole Structure 113

[0075] 2. Intramedullary nail; 3. Aiming assembly; 31. Connector; 331. Mounting surface; 32. Positioning pin; 33. Fixing element; 34. Slide rail; 341. Sliding channel; 342. First sliding wall; 343. Second sliding wall; 344. Positioning hole; 345. First limiting groove; 346. Second limiting groove; 347. Mark; 4. Guide assembly; 41. Guide body; 41. Mounting hole; 411. Circumferential groove; 4111. Sliding groove; 4112. First notch; 413. Second notch; 414. Internal gear; 415. First sliding groove; 416. Second sliding groove; 417. Mounting groove; 418. Notch; 419. Aiming hole. 420, 4201, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 43, 43, 43, 44, 45, 46, 47, 48, 48, 48, 48, 48, 48, 48, 48, 48, 49 ... Detailed Implementation

[0076] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this invention pertains. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. Unless otherwise specified, the term "connection" as used herein can refer to a direct connection or an indirect connection, i.e., a connection through an intermediate object.

[0077] In this text, the term "distal" refers to the end that is farther from the operator and closer to the patient; the term "proximal" refers to the end that is closer to the operator and farther from the patient.

[0078] To address the problems existing in the prior art, embodiments of the present invention provide an intramedullary nail aiming frame, with reference to... Figure 1 and Figure 2 As shown, the intramedullary nail aiming frame includes a handle 1, an aiming assembly 3, and a guide assembly 4. The handle 1 has a first distal end 111 and a second distal end 112, located on the same side of the handle 1. The second distal end 112 is used to connect to the intramedullary nail 2. The aiming assembly 3 is connected to the first distal end 111. The guide assembly 4 includes a guide body 41 and a guide wheel 42. The guide body 41 is disposed on the aiming assembly 3 and is movable along the extending direction of the aiming assembly 3. The guide wheel 42 is rotatably disposed on the guide body 41. The guide wheel 42 has a guide hole 421 radially facing the intramedullary nail 2. The guide hole 421 is used to fix a screw sleeve, and the end of the screw sleeve near the intramedullary nail 2 is used to connect a screw.

[0079] In this embodiment, the guide body 41 can move along the extension direction of the aiming component 3 to adjust the position of the screw. The guide wheel 42 is rotatably mounted on the guide body 41, thereby realizing the adjustment of the screw angle direction. The angle adjustment is flexible, allowing the intramedullary nail aiming frame to freely adjust the angle and distance of the screw according to the surgical needs. It can achieve aiming and positioning of the screw hole at the head end of the intramedullary nail as well as aiming and positioning of the hole at the tail end of the intramedullary nail, adapting to the bone structure and surgical requirements of different patients, greatly improving the flexibility and adaptability of the surgery, and reducing the risk of surgery.

[0080] In some embodiments, reference Figure 1 and Figure 3 As shown, the guide body 41 is provided with an aiming hole 419, which is used to aim at the tail end hole of the intramedullary nail 2 to achieve aiming and positioning of the tail end hole of the intramedullary nail 2.

[0081] In some embodiments, reference Figures 1 to 5 As shown, the guide body 41 has a mounting hole 411, and the guide wheel 42 is rotatably disposed in the mounting hole 411 for adjusting the angle of the guide hole 421. During aiming and positioning, the screw sleeve is inserted into the guide hole 421 and fixed, with one end of the screw sleeve extending toward the intramedullary nail 2.

[0082] In this embodiment, by rotatably placing the guide wheel 42 within the mounting hole 411, the angle direction of the screw can be adjusted, and the angle adjustment is flexible.

[0083] In some specific embodiments, reference is made to Figures 1 to 5 As shown, the guide body 41 also has a first notch 412 and a second notch 413. The first notch 412 and the second notch 413 are located on opposite upper and lower sides of the mounting hole 411 and are both connected to the mounting hole 411. The guide wheel 42 is rotatably disposed in the mounting hole 411. During aiming and positioning, the screw sleeve is inserted into the guide hole 421 and fixed, with one end of the screw sleeve extending through the first notch 412 and the other end of the screw sleeve extending toward the intramedullary nail 2 through the second notch 413.

[0084] In this embodiment, by opening the first notch 412 and the second notch 413 on opposite sides of the mounting hole 411, the adjustment angle of the screw is increased, and interference between the screw sleeve and the guide body 41 is avoided during angle adjustment, which would affect the range of angle adjustment.

[0085] Furthermore, the first notch 412 and the second notch 413 have the same length, and the lengths of the first notch 412 and the second notch 413 are both greater than the radius of the mounting hole 411 and less than the diameter of the mounting hole 411.

[0086] In this embodiment, by setting the lengths of the first notch 412 and the second notch 413 to be the same, and by setting the lengths of both the first notch 412 and the second notch 413 to be greater than the radius of the mounting hole 411 and less than the diameter of the mounting hole 411, the range of the rotation adjustment angle of the guide wheel 42 is larger, thereby increasing the flexibility of screw angle adjustment.

[0087] In some embodiments, the inner wall of the mounting hole 411 has an internal gear 414, and the outer wall of the guide wheel 42 is provided with an external gear 422. The internal gear 414 and the external gear 422 mesh, and when a torque is applied to the guide wheel 42, the guide wheel 42 can rotate within the mounting hole 411.

[0088] In this embodiment, the addendum of both the internal gear 414 and the external gear 422 is relatively small, and both can undergo certain deformation. When no torque is applied to the guide wheel 42, the internal gear 414 and the external gear 422 engage and lock together. When torque is applied to the guide wheel 42, the guide wheel 42 can rotate within the mounting hole 411, thereby achieving angle adjustment of the screw. Furthermore, through the engagement of the internal gear 414 and the external gear 422, a step-by-step locking effect is achieved for the guide wheel 42, increasing the reliability, accuracy, and stability of angle adjustment.

[0089] In some embodiments, reference Figures 2 to 5 As shown, the guide assembly 4 also includes a magazine sleeve 43 and a locking member 44. The magazine sleeve 43 passes through the guide hole 421 and is fixedly connected to the guide hole 421. The inner diameter of the magazine sleeve 43 is adjustable. The screw sleeve passes through the magazine sleeve 43. The locking member 44 is provided on the guide body 41 and is used to fix the magazine sleeve 43 to the guide body 41.

[0090] In this embodiment, the outer wall of the guide wheel 42 has a protruding structure with a threaded hole leading to the guide hole 421. The locking member 44 is a locking pin that engages with the threaded hole. By rotating the locking member 44, it abuts against the magazine sleeve 43 to fix the magazine sleeve 43. Since the inner diameter of the magazine sleeve 43 is adjustable, it is suitable for fixing screw sleeves with different outer diameters.

[0091] Furthermore, combined Figure 6 As shown, the magazine sleeve 43 has several grooves on its wall, which are arranged in a ring at intervals and extend to one end of the magazine sleeve 43, so that the wall of the magazine sleeve 43 forms several arc-shaped portions 431, making it easier to deform. In some embodiments, refer to Figure 4 and Figure 5 As shown, the guide assembly 4 also includes a fixing seat 45, which has a fixing through hole. The other end of the magazine sleeve 43 passes through the fixing through hole and is fixedly connected to the fixing through hole. The fixing seat 45 is located below the guide wheel 42 and is detachably connected to the guide wheel 42.

[0092] Specifically, the fixed base 45 is fixedly connected to the guide wheel 42 by bolts.

[0093] In some embodiments, reference Figure 1 , Figure 2 and Figure 7 As shown, the aiming assembly 3 includes a slide rail 34, the proximal end of which is connected to the first distal end 111 of the handle. The slide rail 34 has a sliding channel 341 along its axial direction. The guide body 41 is movably disposed in the sliding channel 341 so that the guide body 41 can be adjusted laterally.

[0094] In some embodiments, the slide rail 34 has a first sliding wall 342 and a second sliding wall 343, which are arranged opposite to each other to form the sliding channel 341. The guide body 41 has a first sliding groove 415 and a second sliding groove 416 on its opposite side walls. The first sliding groove 415 is slidably engaged with the first sliding wall 342, and the second sliding groove 416 is slidably engaged with the second sliding wall 343, so that the guide body 41 can move on the slide rail 34.

[0095] In some embodiments, reference Figure 4 , Figure 5 and Figure 7 As shown, the inner side of the first sliding wall 342 is provided with a first limiting groove 345 along its axial direction, and the inner side of the second sliding wall 343 is provided with a second limiting groove 346 along its axial direction. One side wall of the guide wheel 42 is provided with a first limiting part 423, and the other side wall is provided with a second limiting part 424. The first limiting part cooperates with the first limiting groove 345, and the second limiting part 424 cooperates with the second limiting groove 346.

[0096] In this embodiment, both the first limiting groove 345 and the second limiting groove 346 are semi-circular straight grooves, meaning that the two ends of the first limiting groove 345 and the second limiting groove 346 are semi-circular, and the middle is a straight groove. The first limiting part 423 and the second limiting part 424 are circular protrusions. By engaging the first limiting part with the first limiting groove 345 and the second limiting part 424 with the second limiting groove 346, the limiting movement of the guide body 41 is achieved, and the stability during movement is ensured.

[0097] Further, refer to Figure 2 , Figure 3 and Figure 7 As shown, the guide assembly 4 further includes a first slider 46 and a second slider 47. The first slider 46 is disposed on the side wall of the guide body 41 and cooperates with the first slide groove 415 to form a first slide cavity. The second slider 47 is disposed on the other side wall of the guide body 41 and cooperates with the second slide groove 416 to form a second slide cavity. The first sliding wall 342 passes through the first slide cavity, and the second sliding wall 343 passes through the second slide cavity, so that the guide body 41 can move axially along the slide rail 34.

[0098] Specifically, the first slider 46, the second slider 47, and the guide body 41 are detachably connected.

[0099] In this embodiment, the guide body 41 has a first through hole on its edge, the first slider 46 has a second through hole corresponding to the first through hole, and the second slider 47 has a threaded hole corresponding to the first through hole. The bolt passes through the first through hole, the second through hole and the threaded hole and is threadedly connected.

[0100] In some embodiments, the outer surface of the first sliding wall 342 and / or the second sliding wall 343 is provided with a marking portion 347 along its axial direction. The marking portion 347 cooperates with the first slider 46 and the second slider 47 to mark the sliding distance of the guide assembly 4.

[0101] In this embodiment, the marking part 347 is a scale line provided on the outer surface of the first sliding wall 342 and / or the second sliding wall 343, used to mark the moving distance of the guide body 41, so that the operator knows the adjustment distance and improves the aiming accuracy.

[0102] In some embodiments, reference Figure 1 , Figure 3 , Figure 7 and Figure 8 As shown, the guide assembly 4 further includes a positioning element 48. One side wall of the positioning element 48 has an elastic tab 481, and the other side wall has a positioning protrusion 482. The guide body 41 has a mounting groove 417. The inner side wall of the mounting groove 417 has a notch 418 corresponding to the second sliding wall 343. The inner surface of the second sliding wall 343 has several positioning holes 344 along its axial direction. The positioning element 48 is disposed within the mounting groove 417. The elastic tab 481 abuts against one side wall of the mounting groove 417, and the positioning protrusion 482 engages with the positioning holes 344 through the notch 418. When a force is applied to the positioning element 48 in the direction of the elastic tab 481, the positioning protrusion 482 separates from the positioning holes 344, and the guide assembly 4 can move axially along the slide rail 34.

[0103] In this embodiment, the bottom of the positioning member 48 has a movable channel 483, and the guide body 41 has a threaded hole corresponding to the movable channel 483. A fixing bolt passes through the movable channel 483 and is threadedly connected to the threaded hole to fix the positioning member 48. The elastic tab 481 abuts against the side wall of the mounting groove 417 to apply elastic force to the positioning member 48, causing the positioning protrusion 482 to pass through the notch 418 on the mounting groove 417 and engage with the positioning hole 344 for positioning. Therefore, when a force is applied to the positioning member 48 in the direction of the elastic tab 481, the positioning protrusion 482 separates from the positioning hole 344, and the guide assembly 4 can move axially along the slide rail 34.

[0104] In some embodiments, reference Figure 1 , Figure 7 , Figure 9 and Figure 10 As shown, the aiming assembly 3 also includes a connector 31, the proximal end of which is detachably connected to the first distal end 111, and the distal end of which is detachably connected to the slide rail 34.

[0105] Specifically, the handle 1 includes a detachably connected first handle 11 and a second handle 12. The distal end of the first handle 11 is the first distal end 111, and the distal end of the second handle 12 is the second distal end 112. The upper surface of the first distal end 111 is a planar structure, and the planar structure is provided with hole structures 113 for connecting with the connector 31. Preferably, three hole structures 113 are arranged in sequence at intervals. The connector 31 is provided with a positioning pin 32 and a fixing member 33. The positioning pin 32 and the fixing member 33 are connected to the hole structures 113, thereby realizing the detachable connection between the connector 31 and the handle 1.

[0106] In this embodiment, the hole structure 113 provided on the first distal end 111 includes a pin hole, a through hole, and a pin hole in sequence. The positioning pin 32 can be a diamond-shaped pin or a round pin, and the fixing member 33 can be a locking bolt with an external thread structure.

[0107] Furthermore, the distal side walls of the connector 31 are provided with recessed mounting surfaces 331, and the mounting surfaces 331 are provided with two threaded holes. The proximal end of the slide rail 34 is provided with a countersunk through hole corresponding to the threaded hole. The screw passes through the countersunk through hole and is threadedly connected to the threaded hole, so that the slide rail 34 and the connector 31 can be detachably connected.

[0108] In another embodiment of the present invention, an intramedullary nail aiming frame is provided, which differs from the intramedullary nail aiming frame disclosed in the above embodiments in that the design of the guide component is different.

[0109] Specifically, refer to Figure 4 and Figures 11 to 14 As shown, the guide assembly 4 includes a guide body 41 and a locking mechanism 49. The guide body 41 has a mounting hole 411, the inner wall of which is a smooth arc surface, and a circumferential groove 4111 is formed on the inner wall of the mounting hole 411. The circumferential groove 4111 is an arc-shaped groove arranged circumferentially along the mounting hole 411. The locking mechanism 49 includes a locking member 491, which is movably disposed within the circumferential groove 4111. The guide wheel 42 is rotatably disposed within the mounting hole 411, and an external gear 422 is provided on the outer wall of the guide wheel 42.

[0110] When a force is applied to the locking mechanism 49 to make the locking member 491 engage with the external gear 422, the guide wheel 42 locks with the guide body 41.

[0111] Furthermore, the locking member 491 is an arc-shaped sliding piece, and the surface of the sliding piece near the guide wheel 42 is provided with protruding teeth 4911. The protruding teeth 4911 are used to cooperate with the external gear 422 to fix the guide wheel 42 to the guide body 41. When a force is applied to the locking mechanism 49, the protruding teeth 4911 move and mesh with the external gear 422.

[0112] In some preferred embodiments, the surface of the slide near the guide wheel 42 is further provided with a sliding portion 4912, the sliding portion 4912 being arranged side by side with the tooth 4911, and the sliding portion 4912 always contacting the tooth surface of the external gear 422. Preferably, the protrusion height of the sliding portion 4912 is the same as the protrusion height of the tooth 4911.

[0113] In this embodiment, the sliding part 4912 is provided on the slider to ensure the stability of the slider when it moves.

[0114] In some embodiments, the locking member 491 includes a detachable first slide and a second slide, which are arranged side by side and detachably connected at the bottom by a pin. The first slide is rotatably connected to a rotating connecting rod 493. The first slide has a sliding portion 4912, and the second slide has at least one protruding tooth 4911. It is understood that disassembling the locking member 491 into the first slide and the second slide and processing them separately reduces the difficulty of manufacturing the locking member 491.

[0115] In some embodiments, the locking member 491 may also be integrally formed with a toothed structure 4911 and a sliding part 4912.

[0116] In some embodiments, reference Figure 13 and Figure 14 As shown, the side wall of the locking member 491 is provided with a sliding pin 4913, and the inner side wall of the circumferential groove 4111 opposite to the locking member 491 is provided with a sliding groove 4112. The top of the sliding groove 4112 is inclined toward the direction of the guide wheel, and the sliding pin 4913 is slidably disposed in the sliding groove 4112.

[0117] In this embodiment, the sliding pin 4913 is used in conjunction with the sliding groove 4112 to limit the sliding direction of the locking member 491, so that the locking member 491 can be better locked with the guide wheel 42.

[0118] In some embodiments, the locking mechanism 49 further includes a button 492, a rotating connecting rod 493, a first connecting pin 494, and a second connecting pin 495. The guide body has a movable groove 420, which communicates with the circumferential groove 4111 through an internal channel. Specifically, the movable groove 420 has a rectangular recess structure and extends towards the mounting hole 411. An elongated hole 4201, which can be oblong, is formed on the inner sidewall opposite to the movable groove 420, and its extending direction is the same as that of the movable groove 420. The button 492 is disposed within the movable groove 420 and can move along the extending direction of the movable groove 420. One end of the rotating connecting rod 493 is connected to the button 492 via the first connecting pin 494, and the end of the first connecting pin 494 is movably located within the elongated hole 4201. The other end of the rotating connecting rod 493 extends into the circumferential groove 4111 and is rotatably connected to the locking member 491. The second connecting pin 495 passes through the rotating connecting rod 493 and connects to a pin hole opened inside the guide body 41, for defining the rotation trajectory of the rotating connecting rod 493.

[0119] In this embodiment, in the initial state, the guide wheel 42 and the guide body 41 are in an unlocked state, meaning the guide wheel 42 can rotate freely relative to the guide body 41, and the button 492 is located on the right side of the moving groove 420. When it is necessary to lock the guide wheel 42 and the guide body 41, a force is applied to the button 492 toward the left side of the moving groove 420, causing the button 492 to move toward the left side of the moving groove 420 under the cooperation of the first connecting pin 494 and the elongated hole 4201. During this process, the rotating connecting rod 493 rotates to drive the locking member 491 to rotate clockwise until the convex tooth 4911 engages with the external gear 422 to achieve locking. When it is necessary to unlock, a force is applied to the button 492 toward the right side of the moving groove 420 to achieve unlocking. It can be understood that the locking method in this embodiment can effectively protect the external gear 422 structure of the guide wheel 42, reduce its wear, and extend the service life of the guide assembly 4.

[0120] The above description is merely a specific implementation of the embodiments of this application, but the protection scope of the embodiments of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the embodiments of this application should be covered within the protection scope of the embodiments of this application. Therefore, the protection scope of the embodiments of this application should be determined by the protection scope of the claims.

Claims

1. An intramedullary nail aiming frame, characterized in that, Includes a handle, aiming assembly, and guiding assembly; The handle has a first distal end and a second distal end, the second distal end being used to connect to an intramedullary nail; The aiming component includes a slide rail connected to the first distal end, and the slide rail has a sliding channel along its axial direction; The guiding assembly includes a guiding body and a guiding wheel. The guiding body is movably disposed in the sliding channel and can move along the extending direction of the aiming assembly. The guiding wheel is rotatably disposed in the guiding body. The guiding wheel has a guiding hole along its radial direction facing the intramedullary nail. The guiding hole is used to fix the screw sleeve. The guide body has mounting holes; The guide wheel is rotatably disposed within the mounting hole; During aiming and positioning, the screw sleeve is inserted through the guide hole, and one end of the screw sleeve extends toward the intramedullary nail; The outer wall of the guide wheel is provided with an external gear; The guide assembly further includes a locking mechanism disposed on the guide body, the locking mechanism including a locking element disposed in the mounting hole, the locking element cooperating with the external gear.

2. The intramedullary nail aiming frame according to claim 1, characterized in that, The slide rail has a first sliding wall and a second sliding wall, which are arranged opposite to each other to form the sliding channel; The guide body has a first sliding groove and a second sliding groove on its two opposite side walls, respectively. The first sliding groove slides in conjunction with the first sliding wall, and the second sliding groove slides in conjunction with the second sliding wall.

3. The intramedullary nail aiming frame according to claim 2, characterized in that, The inner side of the first sliding wall is provided with a first limiting groove along its axial direction, and the inner side of the second sliding wall is provided with a second limiting groove along its axial direction. The guide wheel has a first limiting part on one side wall and a second limiting part on the other side wall. The first limiting part slides in conjunction with the first limiting groove, and the second limiting part slides in conjunction with the second limiting groove.

4. The intramedullary nail aiming frame according to claim 2, characterized in that, The guide assembly further includes a first slider and a second slider; The first slider is connected to the first slide groove, and the second slider is connected to the second slide groove.

5. The intramedullary nail aiming frame according to claim 4, characterized in that, The outer surface of the first sliding wall and / or the second sliding wall is provided with a marking portion along its axial direction. The marking portion cooperates with the first slider and the second slider to mark the sliding distance of the guide assembly.

6. The intramedullary nail aiming frame according to claim 3, characterized in that, The guide assembly further includes a positioning element, which has an elastic tab on one side wall and a positioning protrusion on the other side wall. The guide body is provided with an installation groove, and the inner sidewall of the installation groove is provided with a notch corresponding to the second sliding wall; The inner surface of the second sliding wall is provided with a plurality of positioning holes along its axial direction; The positioning element is disposed in the mounting groove, the elastic tab abuts against one side wall of the mounting groove, and the positioning protrusion is connected to the positioning hole through the notch; When a force is applied to the positioning member in the direction of the elastic tab, the positioning protrusion separates from the positioning hole, and the guide assembly can move axially along the slide rail.

7. The intramedullary nail aiming frame according to any one of claims 1 to 6, characterized in that, The aiming assembly further includes a connector, the proximal end of which is detachably connected to the first distal end, and the distal end of which is detachably connected to the slide rail.

8. The intramedullary nail aiming frame according to claim 1, characterized in that, The locking element is an internal gear disposed on the inner sidewall of the mounting hole, and the internal gear meshes with the external gear; When a torque is applied to the guide wheel, the guide wheel can rotate within the mounting hole.

9. The intramedullary nail aiming frame according to claim 1, characterized in that, The inner wall of the mounting hole is provided with a circumferential groove, and the locking member is movably disposed in the circumferential groove; The outer wall of the guide wheel is provided with an external gear; When a force is applied to the locking mechanism to engage the locking element with the external gear, the guide wheel is fixed to the guide body.

10. The intramedullary nail aiming frame according to claim 9, characterized in that, The locking element is an arc-shaped slide plate, and the surface of the slide plate near the guide wheel is provided with protruding teeth; When a force is applied to the locking mechanism, the convex tooth meshes with the external gear.

11. The intramedullary nail aiming frame according to claim 10, characterized in that, The surface of the slide near the guide wheel is also provided with a sliding part, which contacts the tooth surface of the external gear.

12. The intramedullary nail aiming frame according to claim 10, characterized in that, The side wall of the locking component is provided with a sliding pin; The inner wall of the circumferential groove is provided with a sliding groove, and the top of the sliding groove is inclined toward the guide wheel; The sliding pin is slidably disposed within the sliding groove.

13. The intramedullary nail aiming frame according to claim 11, characterized in that, The locking mechanism also includes a button, a rotating linkage, a first connecting pin, and a second connecting pin; The guide body is provided with a movable groove, which is connected to the circumferential groove. The inner sidewall of the movable groove is provided with an elongated hole that extends toward the mounting hole. The button is located within the movable slot; One end of the rotating link is connected to the button via the first connecting pin, and the end of the first connecting pin is located in the elongated hole. The other end of the rotating link extends into the circumferential groove and is connected to the locking member. The second connecting pin passes through the rotating link and is connected to the guide body to limit the rotation trajectory of the rotating link.

14. The intramedullary nail aiming frame according to claim 1, characterized in that, The guide assembly also includes a magazine sleeve and a locking element; The magazine sleeve passes through the guide hole and is fixedly connected to the guide body. The inner diameter of the magazine sleeve is adjustable. The screw sleeve passes through the magazine sleeve. The locking element is located on the guide wheel and is used to fix the magazine sleeve to the guide wheel.

15. The intramedullary nail aiming frame according to claim 14, characterized in that, The magazine sleeve has several grooves on its wall, which are arranged in a ring at intervals and extend to one end of the magazine sleeve, so that the wall of the magazine sleeve forms several arc-shaped portions.

16. The intramedullary nail aiming frame according to any one of claims 8 to 15, characterized in that, The guide body has a first notch and a second notch, which are located on opposite sides of the mounting hole and are both connected to the mounting hole.

17. The intramedullary nail aiming frame according to claim 16, characterized in that, The first notch and the second notch have the same length, and the length of both the first notch and the second notch is greater than the radius of the mounting hole but less than the diameter of the mounting hole.

18. The intramedullary nail aiming frame according to claim 1, characterized in that, The guide body is also provided with an aiming hole, which is used to aim at the tail end hole of the intramedullary nail.

19. The intramedullary nail aiming frame according to claim 1, characterized in that, The handle includes a first handle and a second handle that are detachably connected, wherein the distal end of the first handle is the first distal end and the distal end of the second handle is the second distal end.

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