Sleeve type bone nail structure

Abstract

The utility model discloses a sleeve type bone nail structure which comprises a guide part and a bone nail part, the guide part comprises an upper sleeve and a lower sleeve, and the upper sleeve and the lower sleeve are connected through a connecting piece; the first connecting assembly is arranged between the upper sleeve and the connecting piece; the second connecting assembly is arranged between the connecting piece and the lower sleeve; the top end of the upper sleeve is connected with a handheld positioning end used for determining the direction. The bottom end of the lower sleeve is connected with an extension sleeve for connection and fixation; the bone nail part comprises a bone nail rod and an expansion arm, and the bone nail rod is connected with the expansion arm through an adjusting part; and the expansion arm is movably connected with a bone plate positioning end through a pivoting shaft. The sleeve positioning structure is designed, the nail holder and the bone nail are integrated, adjustment is convenient, the occupied space size is effectively reduced, good stability is achieved, the position of a bone plate can be accurately positioned, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a sleeve-type bone screw structure. Background Art

[0002] Bone screws are non-active surgical metal implants for bone connection, consisting of cortical bone screws (full thread and semi-thread) and cancellous bone screws (full thread and semi-thread).

[0003] During orthopedic surgery, bone screws are often implanted in conjunction with a screw holder. The main function of a screw holder is to stably hold the screw, allowing the surgeon to safely and accurately place the screw where it needs to be fixed or implanted. It also maintains alignment with the screw's axis throughout the procedure, controlling the screw's direction of advancement.

[0004] However, the use of nail holders has great limitations. Not only do they occupy more surgical space and make it difficult to accurately position the bone plate, but most existing nail holders do not have good stability and are prone to loosening or falling, leading to surgical failure.

[0005] Therefore, we need to propose a sleeve-type bone screw structure to overcome the above problems. Utility Model Content

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a sleeve-type bone screw structure to solve the problem that the use of existing nail holders has great limitations. Not only do they occupy more surgical space and are difficult to accurately position the bone plate, but most of the existing nail holders do not have good stability and are prone to loosening or falling, resulting in surgical failure.

[0007] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a sleeve-type bone screw structure, including a guide part and a bone screw part, which is characterized in that: the guide part includes an upper sleeve and a lower sleeve, and the upper sleeve and the lower sleeve are connected by a connecting piece. It also includes a first connecting component, which is arranged between the upper sleeve and the connecting piece; and a second connecting component, which is arranged between the connecting piece and the lower sleeve. The top end of the upper sleeve is connected to a handheld positioning end for determining the orientation. The bottom end of the lower sleeve is connected to an extension sleeve for connection and fixation. On the other hand, the bone screw part includes a bone screw rod and an expansion arm, and the bone screw rod and the expansion arm are connected by an adjustment part. The expansion arm is movably connected to the bone plate positioning end through a pivot shaft.

[0008] In order to further improve the usability of the sleeve-type bone screw structure, the present invention adopts a solution in which the first connecting assembly and the second connecting assembly are symmetrically arranged about the center line of the left-right direction of the connecting piece.

[0009] In order to further improve the ease of use of the sleeve-type bone screw structure, the present invention adopts a solution: the first connecting component includes a first internal connection hole and a first external connection column that are assembled in position, one of which is connected to the upper sleeve and the other is connected to the connecting piece.

[0010] In order to further improve the ease of use of the sleeve-type bone screw structure, the present invention adopts a solution: the second connecting component includes a second external connecting column and a second internal connecting hole that are assembled in position, one of which is connected to the connecting member and the other is connected to the lower sleeve.

[0011] In order to further improve the usability of the sleeve-type bone screw structure, the present invention adopts a solution in which a fixing cap groove is connected to the bottom end of the extension sleeve.

[0012] In order to further improve the usability of the sleeve-type bone screw structure, the present invention adopts a solution in which a bone screw cap is connected to the top end of the bone screw rod.

[0013] In order to further improve the usability of the sleeve-type bone screw structure, the present invention adopts a solution in which the fixing cap groove and the bone screw cap are sleeve-fitted.

[0014] In order to further improve the ease of use of the sleeve-type bone screw structure, the present invention adopts a solution that: the upper sleeve and the lower sleeve are both cylindrical or polygonal, and the outer diameter of the upper sleeve is smaller than the outer diameter of the lower sleeve.

[0015] In order to further improve the usability of the sleeve-type bone screw structure, the present invention adopts a solution in which the outer wall contact surface of the upper sleeve is a smooth surface.

[0016] In order to further improve the usability of the sleeve-type bone screw structure, the present invention adopts a solution in which the outer wall contact surface of the lower sleeve is a smooth surface.

[0017] The beneficial effects of the present invention are as follows: the sleeve-type bone screw structure is configured as a sleeve positioning structure, which integrates the nail holder and the bone screw. It is simple to operate, easy to use, and convenient to adjust the length, effectively reducing the space volume required during surgery. Moreover, it has good stability, can accurately locate the position of the bone plate, effectively ensures the quality of surgery, improves surgical efficiency, and also increases the success rate of surgery, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of the guide part of the utility model;

[0020] Figure 3 This is a schematic diagram of the exploded structure of the guide portion of the utility model;

[0021] Figure 4 This is a structural diagram of the first embodiment of the bone nail portion of the present invention;

[0022] Figure 5 This is a structural diagram of the second embodiment of the bone nail portion of the present invention;

[0023] Figure 6 This is a structural diagram of the third embodiment of the bone nail part of the present invention.

[0024] In the figure: 1 guide part, 10 connecting part, 11 upper sleeve, 12 hand-held positioning end, 13 first internal connection hole, 14 first external connection column, 15 second external connection column, 16 second internal connection hole, 17 lower sleeve, 18 extension sleeve, 19 fixing cap groove, 2 bone nail part, 20 bone nail cap, 21 bone nail rod, 22 adjustment part, 23 expansion arm, 24 pivot axis, 25 bone plate positioning end. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figures 1 to 4 The present invention provides a sleeve-type bone screw structure, comprising a guide portion 1 and a bone screw portion 2. The guide portion 1 comprises an upper sleeve 11 and a lower sleeve 17, the upper sleeve 11 and the lower sleeve 17 being connected via a connector 10. The structure further comprises a first connecting assembly disposed between the upper sleeve 11 and the connector 10, and a second connecting assembly disposed between the connector 10 and the lower sleeve 17. A handheld positioning end 12 is connected to the top end of the upper sleeve 11 for determining the guide orientation. An extension sleeve 18 is connected to the bottom end of the lower sleeve 17 for engaging with a fixed cap groove 19. The bone screw portion 2 comprises a bone screw rod 21 and an expansion arm 23, the bone screw rod 21 and the expansion arm 23 being connected via an adjustment portion 22. The expansion arm 23 is movably connected to a bone plate positioning end 25 via a pivot shaft 24.

[0027] The guide part 1 is used to stabilize the bone screw part 2 and to locate the insertion position of the bone screw part 2 according to surgical requirements, so that the bone screw part 2 can be locked into the bone plate in a narrow surgical space.

[0028] The first connecting assembly and the second connecting assembly are symmetrically arranged about the center line of the left and right directions of the connecting member 10 , and the upper sleeve 11 and the lower sleeve 17 are movably connected to each other through the first connecting assembly and the second connecting assembly based on the connecting member 10 .

[0029] The first connecting assembly includes a first internal connection hole 13 and a first external connection post 14 that are aligned and assembled, one of which is connected to the upper sleeve 11 , and the other is connected to the connecting member 10 .

[0030] The second connecting assembly includes a second external connecting post 15 and a second internal connecting hole 16 that are aligned and assembled, one of which is connected to the connecting member 10 , and the other is connected to the lower sleeve 17 .

[0031] The bottom end of the extension sleeve 18 is connected to a fixing cap groove 19, and the top end of the bone screw rod 21 is connected to a bone screw cap 20. The fixing cap groove 19 and the bone screw cap 20 are sleeved and adapted.

[0032] The upper sleeve 11 and the lower sleeve 11 are both cylindrical or polygonal, and the outer diameter of the upper sleeve 11 is smaller than the outer diameter of the lower sleeve 17. The outer wall contact surface of the upper sleeve 11 is a smooth surface, and the outer wall contact surface of the lower sleeve 17 is a smooth surface. Specific embodiment 1

[0033] See also Figure 5 The guide 1 secures the nail 2 and uses it to position the nail 2 for insertion according to surgical requirements. After the lesion is expanded using the expansion arm 23, the plate positioning end 25 is adjusted upward via a pivot 24, allowing the plate positioning end 25 to lock into the bone plate in the confined surgical space. This screw structure incorporates a sleeve-type positioning mechanism, integrating the nail holder and the nail, making it easy to adjust the length and effectively reducing the space required during surgery. Specific embodiment 2

[0034] See also Figure 6 The guide 1 stabilizes the bone nail 2 and uses it to position the nail 2 for insertion according to surgical requirements. After the lesion is expanded using the expansion arm 23, the plate positioning end 25 is adjusted via a pivot shaft 24, driving it downward to lock the nail 2 into the bone plate in a narrow surgical space. This nail structure offers excellent stability, precise plate positioning, and improved surgical success rates, making it highly practical.

[0035] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0036] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A sleeve-type bone screw structure, comprising a guide portion (1) and a bone screw portion (2), characterized in that: The guide portion (1) comprises an upper sleeve (11) and a lower sleeve (17); The upper sleeve (11) and the lower sleeve (17) are connected via a connecting piece (10); It also includes a first connecting assembly, which is arranged between the upper sleeve (11) and the connecting member (10); It also includes a second connecting assembly, which is arranged between the connecting member (10) and the lower sleeve (17); The top end of the upper sleeve (11) is connected to a handheld positioning end (12) for determining orientation; The bottom end of the lower sleeve (17) is connected to an extension sleeve (18) for connection and fixing; The bone nail portion (2) comprises a bone nail rod (21) and an expansion arm (23); The bone screw rod (21) and the expansion arm (23) are connected via an adjustment portion (22); The expansion arm (23) is movably connected to the bone plate positioning end (25) via a pivot shaft (24).

2. The telescopic bone screw structure according to claim 1, characterized in that: The first connecting component and the second connecting component are symmetrically arranged about a center line in the left-right direction of the connecting member (10).

3. The telescopic bone screw structure according to claim 2, characterized in that: The first connecting component comprises a first internal connection hole (13) and a first external connection column (14) which are assembled in alignment, one of which is connected to the upper sleeve (11) and the other is connected to the connecting member (10).

4. The telescopic bone screw structure according to claim 2, characterized in that: The second connecting assembly comprises a second external connecting column (15) and a second internal connecting hole (16) which are assembled in alignment, one of which is connected to the connecting member (10) and the other is connected to the lower sleeve (17).

5. The telescopic bone screw structure according to claim 1, characterized in that: The bottom end of the extension sleeve (18) is connected to a fixing cap groove (19).

6. The telescopic bone screw structure according to claim 1, characterized in that: The top end of the bone screw rod (21) is connected to a bone screw cap (20).

7. The telescopic bone screw structure according to claim 1, characterized in that: The upper sleeve (11) and the lower sleeve (11) are both cylindrical or polygonal, and the outer diameter of the upper sleeve (11) is smaller than the outer diameter of the lower sleeve (17).

8. The telescopic bone screw structure according to claim 7, characterized in that: The outer wall contact surface of the upper sleeve (11) is a smooth surface.

9. The telescopic bone screw structure according to claim 7, characterized in that: The outer wall contact surface of the lower sleeve (17) is a smooth surface.

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