Half-thread self-tapping hollow bone nail

Abstract

The utility model discloses a half-thread self-tapping hollow bone nail which comprises a body assembly. The protection assembly comprises a protection rod, a first sleeve, a first fixing plate, a first rubber plug, a movable nut, a fixing column, a second fixing plate and a second rubber plug; the protection rod penetrates through the periphery in the nut and extends downwards, the first sleeve is in threaded connection to the outer side face of the nut, the first fixing plate is fixedly connected to the top end of the first sleeve, the first rubber plug is fixedly connected to the center of the inner side of the first fixing plate, and the movable nut is in threaded connection to the outer surface of the cutting edge. The fixing columns are fixedly connected to the peripheries of the outer surfaces of the movable nuts, and the second fixing plates are fixedly connected to the outer ends of the fixing columns. The bone nail has the advantages that the two ends of the protection rod are limited through the first fixing plate and the movable nut, so that the protection rod can be fixed to the periphery of the outer side of the bone nail body, and the bone nail body is prevented from being bent due to falling or collision.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a semi-threaded self-tapping hollow bone screw. Background Art

[0002] Semi-threaded self-tapping hollow bone screw is a device used for internal fixation of fractures. It uses a self-tapping thread structure in conjunction with a cutting blade at the front end to position and tighten the bone. At the same time, it is pre-positioned with a thinner bone needle, and then the hollow bone screw is installed so that the thinner bone needle can pass through the hollow part to position the hollow bone screw.

[0003] When existing semi-threaded self-tapping hollow bone screws are transported and stored after production, if they are dropped or collided, the bone screw body is easily deformed under the action of external force, which may easily cause damage to the bone during actual use. Therefore, it is necessary to provide a semi-threaded self-tapping hollow bone screw that can prevent the bone screw body from bending to fix the internal device of the fracture. Utility Model Content

[0004] The purpose of the utility model is to provide a semi-threaded self-drilling hollow bone screw to solve the problem in the above-mentioned background technology that when the existing semi-threaded self-drilling hollow bone screws are transported and stored after production, when they are dropped or collided, the bone screw body is easily deformed under the action of external force, which leads to damage to the bone during actual use.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is a semi-threaded self-tapping hollow bone screw, comprising:

[0007] A body assembly, the body assembly comprising a chip cutting edge and a nut;

[0008] A protection assembly, the protection assembly comprising a protection rod, a first sleeve, a first fixing plate, a first rubber plug, a movable nut, a fixing column, a second fixing plate and a second rubber plug;

[0009] The protective rod extends downward through the interior of the nut, the first sleeve is threadedly connected to the outer side of the nut, the first fixed plate is fixedly connected to the top of the first sleeve, the first rubber plug is fixedly connected to the inner center of the first fixed plate, the movable nut is threadedly connected to the outer surface of the chip blade, the fixed column is fixedly connected to the outer surface of the movable nut, the second fixed plate is fixedly connected to the outer end of the fixed column, and the second rubber plug is fixedly connected to the inner center of the second fixed plate.

[0010] Furthermore, the body assembly also includes a bone screw body, a through hole and a thread groove;

[0011] The chipping blade is fixedly connected to the outer surface of the front end of the bone screw body, and the chipping blade is threaded. The nut is fixedly connected to the top of the bone screw body. The through hole is opened at the central position inside the nut and the bone screw body, and the thread groove is opened on the outer side of the nut.

[0012] Furthermore, a thread structure is provided on the inner side of the first sleeve and is opened relative to the thread groove, and a thread structure is provided on the inner surface of the movable nut and is opened relative to the chip cutting edge.

[0013] Furthermore, the inner side of the movable nut has a hollow annular groove opened relative to the protective rod, and the inner side of the first fixing plate is in contact with one end of the protective rod, and the protective rod is located around the outer side of the bone screw body.

[0014] Furthermore, it also includes a guide assembly, which includes a second sleeve, a fixed round block and a guide groove;

[0015] The second sleeve is threadedly connected to the outer side of the nut, the fixed round block is fixedly connected to the inner position of the second sleeve, and the guide groove is arranged in the inner position of the fixed round block.

[0016] Furthermore, the bottom end of the guide groove corresponds to the outer end of the through hole, and the guide groove is truncated cone-shaped, and the inner side surface of the second sleeve has a thread structure opened relative to the thread groove.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] 1. The utility model provides a protection component, through which a protection rod is placed on the outer side of the bone screw body by passing the nut, and respectively moving the first sleeve and the movable nut toward the central position of the bone screw body through the thread groove and the cutting edge, so that the first fixing plate and the movable nut limit the two ends of the protection rod, so that the protection rod can be fixed at the positions around the outer side of the bone screw body, thereby preventing the bone screw body from bending due to falling or collision, and the first fixing plate and the second fixing plate respectively drive the first rubber plug and the second rubber plug to seal the two ends of the bone screw body, thereby preventing dirt from entering the interior of the bone screw body.

[0019] 2. Based on beneficial effect 1, by setting a guide component, the second sleeve is fixed to the outer side of the nut through the threaded groove, so that the fixed round block is fixed above the nut, so that a thinner bone needle can pass through the guide groove into the through hole, thereby completing the positioning of the bone needle, which is simple to operate and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is the front view of the utility model;

[0022] Figure 2 This is a structural diagram of the main body component of the utility model;

[0023] Figure 3 This is a structural diagram of the protective component of the utility model;

[0024] Figure 4 This is a structural diagram of the guide component of the utility model.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 11. Bone screw body; 12. Cutting blade; 13. Nut; 14. Through hole; 15. Threaded groove; 21. Protective rod; 22. First sleeve; 23. First fixing plate; 24. First rubber plug; 25. Movable nut; 26. Fixing column; 27. Second fixing plate; 28. Second rubber plug; 31. Second sleeve; 32. Fixing round block; 33. Guide groove. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] See also Figure 1-3 As shown, this embodiment is a semi-threaded self-tapping hollow bone screw, comprising:

[0032] A body component, the body component includes a chip cutting edge 12 and a nut 13;

[0033] A protection assembly, the protection assembly includes a protection rod 21, a first sleeve 22, a first fixing plate 23, a first rubber plug 24, a movable nut 25, a fixing column 26, a second fixing plate 27 and a second rubber plug 28;

[0034] The protection rod 21 passes through the inner periphery of the nut 13 and extends downward, the first sleeve 22 is threadedly connected to the outer side of the nut 13, the first fixing plate 23 is fixedly connected to the top of the first sleeve 22, the first rubber plug 24 is fixedly connected to the inner center of the first fixing plate 23, the movable nut 25 is threadedly connected to the outer surface of the chip blade 12, the fixing column 26 is fixedly connected to the outer periphery of the outer surface of the movable nut 25, the second fixing plate 27 is fixedly connected to the outer end of the fixing column 26, and the second rubber plug 28 is fixedly connected to the inner center of the second fixing plate 27;

[0035] The protection rod 21 is used to block the outside of the bone screw body 11, the first sleeve 22 is used to support the first fixing plate 23, the first fixing plate 23 is used to seal the first rubber plug 24, the first rubber plug 24 and the second rubber plug 28 are used to seal the two ends of the bone screw body 11 respectively, the movable nut 25 is used to support the fixing column 26, the fixing column 26 is used to support the second fixing plate 27, and the second fixing plate 27 is used to support the second rubber plug 28;

[0036] The body assembly further includes a bone screw body 11, a through hole 14 and a thread groove 15;

[0037] The chipping blade 12 is fixedly connected to the outer surface of the front end of the bone screw body 11, and the chipping blade 12 is threaded, the nut 13 is fixedly connected to the top of the bone screw body 11, the through hole 14 is provided at the central position inside the nut 13 and the bone screw body 11, and the thread groove 15 is provided at the outer side of the nut 13;

[0038] The cutting blade 12 is used to position and tighten the bone, the nut 13 is used to drive the cutting blade 12 to rotate through the bone screw body 11, and the through hole 14 is used to place the bone pin;

[0039] The first sleeve 22 has a thread structure on the inner side thereof which is opened relative to the thread groove 15, and the movable nut 25 has a thread structure on the inner surface thereof which is opened relative to the chip cutting edge 12;

[0040] The first sleeve 22 can move along the thread groove 15 toward the center of the bone screw body 11 and be fixed on the outer side of the nut 13;

[0041] The inner side of the movable nut 25 has a hollow annular groove relative to the protection rod 21, and the inner side of the first fixing plate 23 is in contact with one end of the protection rod 21. The protection rod 21 is located around the outer side of the bone screw body 11.

[0042] When the inner side of the movable nut 25 and the inner side of the first fixing plate 23 are in contact with the outer end of the protection rod 21 respectively, the protection rod 21 is fixed between the movable nut 25 and the first fixing plate 23;

[0043] Working principle: When it is necessary to prevent the bone screw body 11 from bending, the protection rod 21 is passed through the nut 13 and placed downward, and then a rotational force is applied to the movable nut 25 and the first sleeve 22 respectively, so that the movable nut 25 and the first sleeve 22 are moved toward the middle of the bone screw body 11 along the chip edge 12 and the thread groove 15 respectively, and the movable nut 25 and the first sleeve 22 respectively drive the second fixing plate 27 and the first fixing plate 23 to move toward each other. When the inner side of the movable nut 25 and the inner side of the first fixing plate 23 are moved to contact the outer end of the protection rod 21 respectively, the protection rod 21 is fixed at the outer side of the bone screw body 11, so that the protection rod 21 can be protected to prevent the protection rod 21 from bending.

[0044] The movement of the first fixing plate 23 and the second fixing plate 27 respectively drives the first rubber plug 24 and the second rubber plug 28 to move into the two ends of the bone screw body 11. When the first rubber plug 24 and the second rubber plug 28 move to the two ends of the bone screw body 11, the two ends of the bone screw body 11 can be closed.

[0045] See also Figure 4 As shown, this embodiment is based on the above embodiment and also includes:

[0046] A guide assembly, the guide assembly includes a second sleeve 31, a fixed round block 32 and a guide groove 33;

[0047] The second sleeve 31 is threadedly connected to the outer side of the nut 13, the fixed round block 32 is fixedly connected to the inner position of the second sleeve 31, and the guide groove 33 is opened in the inner position of the fixed round block 32;

[0048] The second sleeve 31 is used to support the fixed round block 32, the fixed round block 32 is used to block the outer end of the nut 13, and the guide groove 33 is used to guide the bone needle;

[0049] The bottom end of the guide groove 33 corresponds to the outer end of the through hole 14, and the guide groove 33 is truncated cone-shaped. The inner side surface of the second sleeve 31 has a thread structure corresponding to the thread groove 15.

[0050] The outer diameter of the guide groove 33 is larger than the diameter of the through hole 14, and the bottom diameter of the guide groove 33 is equal to the diameter of the through hole 14;

[0051] Working principle: When the bone needle needs to be placed inside the through hole 14, the second sleeve 31 is fixed to the outer position of the nut 13 through the threaded structure on the inner side of the second sleeve 31 and the threaded groove 15. The second sleeve 31 drives the fixed round block 32 to be fixed above the nut 13. At this time, the bottom end of the guide groove 33 corresponds to the position of the through hole 14. Since the diameter of the upper end of the guide groove 33 is larger than the diameter of the through hole 14, the bone needle can be easily placed inside the guide groove 33 and can enter the through hole 14 along the guide groove 33.

[0052] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A semi-threaded self-tapping hollow bone screw, characterized in that: include: A body component, the body component comprising a chip cutting edge (12) and a nut (13); A protection assembly, the protection assembly comprising a protection rod (21), a first sleeve (22), a first fixing plate (23), a first rubber stopper (24), a movable nut (25), a fixing column (26), a second fixing plate (27) and a second rubber stopper (28); The protective rod (21) passes through the interior of the nut (13) and extends downward. The first sleeve (22) is threadedly connected to the outer side of the nut (13). The first fixing plate (23) is fixedly connected to the top of the first sleeve (22). The first rubber plug (24) is fixedly connected to the center of the inner side of the first fixing plate (23). The movable nut (25) is threadedly connected to the outer surface of the chip cutting edge (12). The fixing column (26) is fixedly connected to the outer surface of the movable nut (25). The second fixing plate (27) is fixedly connected to the outer end of the fixing column (26). The second rubber plug (28) is fixedly connected to the center of the inner side of the second fixing plate (27).

2. A semi-threaded self-tapping hollow bone screw according to claim 1, characterized in that: The body component also includes a bone screw body (11), a through hole (14) and a thread groove (15); The chipping blade (12) is fixedly connected to the outer surface of the front end of the bone screw body (11), and the chipping blade (12) is threaded. The nut (13) is fixedly connected to the top of the bone screw body (11). The through hole (14) is provided at the central position inside the nut (13) and the bone screw body (11), and the thread groove (15) is provided at the outer side of the nut (13).

3. A semi-threaded self-tapping hollow bone screw according to claim 1, characterized in that: The inner side of the first sleeve (22) has a thread structure opened relative to the thread groove (15), and the inner surface of the movable nut (25) has a thread structure opened relative to the chip cutting edge (12).

4. A semi-threaded self-tapping hollow bone screw according to claim 1, characterized in that: The inner side of the movable nut (25) has a hollow annular groove opened relative to the protective rod (21), and the inner side of the first fixing plate (23) is in contact with one end of the protective rod (21), and the protective rod (21) is located around the outer side of the bone screw body (11).

5. The semi-threaded self-tapping hollow bone screw according to claim 1, characterized in that: It also includes a guide assembly, which includes a second sleeve (31), a fixed round block (32) and a guide groove (33); The second sleeve (31) is threadedly connected to the outer side of the nut (13), the fixed round block (32) is fixedly connected to the inner position of the second sleeve (31), and the guide groove (33) is opened in the inner position of the fixed round block (32).

6. A semi-threaded self-tapping hollow bone screw according to claim 5, characterized in that: The bottom end of the guide groove (33) corresponds to the outer end of the through hole (14), and the guide groove (33) is truncated cone-shaped. The inner side surface of the second sleeve (31) has a thread structure opened relative to the thread groove (15).

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