CN217040205U

CN217040205U - Patella superior approach intramedullary nail

Info

Publication number: CN217040205U
Application number: CN202220061462.4U
Authority: CN
Inventors: 马程相; 施钢花; 许哲勇
Original assignee: Jiangsu Angel Medical Instruments Co ltd
Current assignee: Jiangsu Angel Medical Instruments Co ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-07-26
Anticipated expiration: 2032-01-11

Abstract

The utility model discloses an access intramedullary nail on kneecap relates to intramedullary nail technical field, comprising a main body, the installation piece is all installed at the both ends of main part inner wall, and the both ends of main part outer wall have all seted up the screw, the inside of screw has all run through the shank of bolt, and the one end of shank of bolt all installs the cap of bolt, the one end of cap of bolt all is provided with the knob, and the one end of knob all installs the swing arm, the movable plate is all installed through the bearing to the one end of swing arm, and the inside of movable plate has all seted up two guide slots, the inside of shank of bolt outer wall all is provided with two kellies, and the one end of kellies extends to the inside of shank of bolt. The utility model discloses a position of restriction kelly reaches the rotatory effect of restriction shank of bolt for the shank of bolt is more stable, avoids the main part not hard up to appear.

Description

Patella superior approach intramedullary nail

Technical Field

The utility model relates to the technical field of intramedullary nails, in particular to an intramedullary nail for entry on the patella.

Background

In an orthopedic surgery, in order to reduce damage to periosteum blood circulation, retain growth factors with osteogenesis in hematoma, and ensure that marrow-expanding fragments have a self-grafting bone effect, and the muscle contraction generates micromotion to provide mechanical stimulation and other factors to promote fracture healing, an intramedullary nail is usually adopted for fixation, wherein for the convenience of a patient, the intramedullary nail is usually driven in by a method of entering a path on a patella.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an approach intramedullary nail on the kneecap to solve the problem that the bolt on the intramedullary nail proposed in the above-mentioned background technology may become flexible.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an entry intramedullary nail on kneecap, includes the main part, the installation piece is all installed at the both ends of main part inner wall, and the both ends of main part outer wall have all seted up the screw, the inside of screw has all been run through the shank of bolt, and the one end of shank of bolt all installs the cap of bolt, the one end of cap of bolt all is provided with the knob, and the one end of knob all installs the hob, the movable plate is all installed through the bearing to the one end of hob, and the inside of movable plate has all seted up two guide slots, the inside of shank of bolt outer wall all is provided with two kellies, and the one end of kellies extends to the inside of shank of bolt, the guide block is all installed to the front end of the inside kellies of shank of bolt, and the one end of guide block all extends to the inside of guide slot.

Furthermore, the shape of the bolt cap is circular, and the diameter of the bolt cap is larger than that of the screw hole.

Furthermore, the bolt rod is in threaded connection with the screw hole through threads, and the length of the bolt rod is larger than the outer diameter of the main body.

Furthermore, a groove is formed in one end of each mounting block, and the groove and the center of each clamping rod are located on the same horizontal line.

Furthermore, the shapes of the groove and the clamping rod are regular hexagons, and the size of the groove is the same as that of the clamping rod.

Further, the guide slot is arranged in an inclined manner, and the inclination angle between the guide slot and the horizontal plane is.

Furthermore, the inner wall of the bolt rod is provided with a sliding groove, one end of the moving plate is provided with a sliding block, and the moving plate is in sliding connection with the bolt rod through the matching between the sliding block and the sliding groove.

Compared with the prior art, the beneficial effects of the utility model are that:

the knob is rotated, the movable plate can be pressed downwards through the rotary rod, when the movable plate moves downwards, thrust is applied to the guide block by the inner wall of the guide groove, the clamping rod is pushed out from the inside of the bolt rod, the clamping rod is inserted into the groove, and the installation block is butted, so that the effect of limiting the rotation of the bolt rod can be achieved by limiting the position of the clamping rod, the bolt rod can be more stable, and looseness of a main body is avoided.

Drawings

Fig. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view of the side view of the present invention;

FIG. 3 is a schematic view of a side view structure of the assembly of the mounting block and the clamping rod of the present invention;

fig. 4 is a schematic view of the front cross-section structure of the bolt shaft of the present invention.

In the figure: 1. a bolt cap; 2. a main body; 3. a bolt shank; 4. a knob; 5. a screw hole; 6. mounting a block; 7. a clamping rod; 8. rotating the rod; 9. a groove; 10. a guide groove; 11. a guide block; 12. and (5) moving the plate.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments.

The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art. The embodiment is as follows: referring to fig. 1-4, an intramedullary nail for suprapatellar approach includes a main body 2, mounting blocks 6 are mounted at both ends of an inner wall of the main body 2, screw holes 5 are formed at both ends of an outer wall of the main body 2, bolt rods 3 penetrate through the screw holes 5, bolt caps 1 are mounted at one ends of the bolt rods 3, knobs 4 are arranged at one ends of the bolt caps 1, turnbars 8 are mounted at one ends of the knobs 4, a movable plate 12 is mounted at one end of each turnbar 8 through a bearing, two guide grooves 10 are formed in the movable plate 12, two clamping rods 7 are arranged in the outer wall of each bolt rod 3, one ends of the clamping rods 7 extend into the corresponding bolt rod 3, guide blocks 11 are mounted at front ends of the clamping rods 7 in the corresponding bolt rods 3, and one ends of the guide blocks 11 extend into the corresponding guide grooves 10.

The bolt cap 1 is circular in shape, and the diameter of the bolt cap 1 is larger than that of the screw hole 5.

The bolt rod 3 is in threaded connection with the screw hole 5 through threads, and the length of the bolt rod 3 is larger than the outer diameter of the main body 2;

specifically, as shown in fig. 1, 2 and 4, the bolt shank 3 is inserted into the screw hole 5 to connect the body 2 and the shaft, thereby completing the fixation of a plurality of bones of the leg while preventing torsion between the bones of the leg.

One end of the mounting block 6 is provided with a groove 9, and the groove 9 and the center of the clamping rod 7 are positioned on the same horizontal line;

the shapes of the groove 9 and the clamping rod 7 are regular hexagons, and the groove 9 and the clamping rod 7 are the same in size;

specifically, as shown in fig. 3, the position of the clamping rod 7 is limited by the groove 9, so that the rotation effect of the bolt rod 3 can be limited, the bolt rod 3 is more stable, and the main body 2 is prevented from loosening.

The guide groove 10 is obliquely arranged, and the inclination angle between the guide groove 10 and the horizontal plane is 70 degrees;

the inner wall of the bolt rod 3 is provided with a sliding groove, one end of the moving plate 12 is provided with a sliding block, and the moving plate 12 is in sliding connection with the bolt rod 3 through the matching between the sliding block and the sliding groove;

specifically, as shown in fig. 4, the knob 4 is rotated to press the moving plate 12 downward via the rotating rod 8, and the inner wall of the guide groove 10 pushes the guide block 11 while the moving plate 12 moves downward, thereby pushing the locking rod 7 out of the bolt rod 3.

The working principle is as follows: when the device is used, the main body 2 is used for connecting and fixing each broken leg bone, and the bolt rod 3 is inserted into the screw hole 5 so as to connect the main body 2 and the bone body, thus completing the fixation of a plurality of leg bones and avoiding the leg bones from twisting;

after fixing shank of bolt 3, rotate knob 4 gently, make it push down movable plate 12 through swing arm 8, movable plate 12 is when the downward movement, the inner wall of guide slot 10 applys thrust to guide block 11, push out shank of bolt 7 from the inside of shank of bolt 3, make its inside and installation piece 6 that insert recess 9 accomplish the butt joint, thereby can reach the rotatory effect of restriction shank of bolt 3 through the position of restriction shank of bolt 7, can make shank of bolt 3 more stable, avoid main part 2 to appear becoming flexible.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. An suprapatellar approach intramedullary nail comprising a main body (2), characterized in that: the two ends of the inner wall of the main body (2) are respectively provided with an installation block (6), the two ends of the outer wall of the main body (2) are respectively provided with a screw hole (5), a bolt rod (3) penetrates through the screw holes (5), and one end of each bolt rod (3) is provided with a bolt cap (1), one end of each bolt cap (1) is provided with a knob (4), and one end of the knob (4) is provided with a rotating rod (8), one end of the rotating rod (8) is provided with a moving plate (12) through a bearing, two guide grooves (10) are arranged inside the moving plate (12), two clamping rods (7) are arranged inside the outer wall of the bolt rod (3), and one end of the clamping rod (7) extends to the inside of the bolt rod (3), guide blocks (11) are installed at the front ends of the clamping rods (7) inside the bolt rod (3), and one ends of the guide blocks (11) extend to the inside of the guide grooves (10).

2. The suprapatellar approach intramedullary nail of claim 1, wherein: the bolt cap (1) is circular, and the diameter of the bolt cap (1) is larger than that of the screw hole (5).

3. The suprapatellar approach intramedullary nail of claim 1, wherein: the bolt rod (3) is in threaded connection with the screw hole (5) through threads, and the length of the bolt rod (3) is larger than the outer diameter of the main body (2).

4. The suprapatellar approach intramedullary nail of claim 1, wherein: one end of the mounting block (6) is provided with a groove (9), and the centers of the groove (9) and the clamping rod (7) are positioned on the same horizontal line.

5. The suprapatellar approach intramedullary nail of claim 4, wherein: the shapes of the groove (9) and the clamping rod (7) are regular hexagons, and the size of the groove (9) is the same as that of the clamping rod (7).

6. The suprapatellar approach intramedullary nail of claim 1, wherein: the guide groove (10) is obliquely arranged, and the inclination angle between the guide groove (10) and the horizontal plane is 70 degrees.

7. The suprapatellar approach intramedullary nail of claim 1, wherein: the inner wall of the bolt rod (3) is provided with a sliding groove, one end of the moving plate (12) is provided with a sliding block, and the moving plate (12) is in sliding connection with the bolt rod (3) through the matching between the sliding block and the sliding groove.