Fracture end reduction locking device

Abstract

The utility model discloses a kind of fracture end reduction locking devices, belong to orthopedics medical instrument technical field, it includes box body, the inner chamber of box body is provided with bidirectional screw rod, the middle fixed sleeve of the outside of bidirectional screw rod is equipped with worm wheel, the bottom of the inner chamber of box body is rotatably connected with the worm that is adapted to worm wheel, the front and rear sides of the inner chamber of box body are all fixedly installed with limiting rod, the left and right sides of box body are all provided with mainboard, the top of mainboard is provided with slot hole, the bottom of slot hole inner chamber is provided with nail cap, the bottom of nail cap is provided with bone nail, the side of mainboard is provided with protection plate, the top of mainboard is provided with positioning bolt, the inside of box body is rotatably connected with the outside of bidirectional screw rod, the left and right sides of bidirectional screw rod all extend to the inside of mainboard.The utility model can adjust the length of mainboard according to demand, to quickly adapt to different operating environment, improve the efficiency of surgical treatment.Meanwhile, the design of protection plate can effectively avoid that nail cap is touched by mistake.

Description

Technical Field

[0001] This utility model relates to the field of orthopedic medical device technology, and in particular to a fracture reduction and locking device. Background Technology

[0002] In the treatment of fracture reduction, bone screws and locking mechanisms are generally used in conjunction with orthopedic external fixators. The main function of the bone screws and locking mechanisms is to drive the bone screws into the bone and then lock the bone screws onto the fixator, thereby achieving the purpose of fixing the bone. As an important medical device, the locking device plays an irreplaceable role in orthopedic surgery. It not only improves the success rate and efficiency of the operation, but also reduces the pain and economic burden on patients.

[0003] Patent document CN221830760U discloses a fracture reduction and locking device, including a main plate and two bone nails. Both ends of the main plate are rotatably connected to secondary plates along their long sides. Each secondary plate has an inverted U-shaped slot on its sidewall furthest from the bone nail, and a sealing plate is fixedly connected to the open end of the inverted U-shaped slot. By inserting the two bone nails into the inverted U-shaped slots and nailing them to both sides of the fracture site, the rotation angle of the two secondary plates is adjusted according to the tilt of the bone nails. A threaded connector drives the end of a linkage rod to move, at which point the secondary plates, main plate, and linkage rod form a stable triangular support. Then, an adjusting component moves the compression block closer to the bone nail until it is compressed and fixed. The adjustable rotation angle of the secondary plates facilitates fixation of fracture sites with different curvatures, avoiding the need for special steel plates, reducing fixation costs, and improving adaptability.

[0004] The aforementioned technical solutions have the following shortcomings: firstly, it is inconvenient to adjust the length of the main board according to needs, making it difficult to adapt to different surgical environments; secondly, the method of fixing the bone screws is relatively cumbersome, and the screw heads are easily accidentally touched, affecting surgical safety and efficiency. Therefore, this utility model aims to provide a fracture end reduction locking device that can quickly adjust the length of the main board, fix the bone screws, and protect the screw heads. Utility Model Content

[0005] The purpose of this invention is to provide a fracture end reduction and locking device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A fracture reduction and locking device includes a housing. A bidirectional lead screw is installed within the inner cavity of the housing. A worm gear is fixedly sleeved on the middle of the outer side of the bidirectional lead screw. A worm adapted to the worm gear is rotatably connected to the bottom of the inner cavity of the housing. Limiting rods are fixedly installed on both the front and rear sides of the inner cavity of the housing. Main plates are provided on both the left and right sides of the housing. A slot is formed on the top of the main plate. A nail head is provided at the bottom of the inner cavity of the slot. A bone nail is provided at the bottom of the nail head. A protective plate is provided on one side of the main plate. A positioning bolt is provided on the top of the main plate.

[0007] Preferably, the middle end of the bidirectional lead screw is rotatably connected to the inner wall of the box, the inner cavity of the main board is provided with a threaded hole, and the two ends of the bidirectional lead screw are respectively connected to the inside of the main board through the threaded hole and threadedly engaged with the main board.

[0008] Preferably, the left and right sides of the limiting rod extend into the interior of the motherboard, and the front and rear sides of the motherboard cavity are provided with sliding holes adapted to the limiting rod, and the inner wall of the sliding hole slides in contact with the outer side of the limiting rod.

[0009] Preferably, the top of the worm gear passes through the housing and is fixed with a knob, and an anti-slip pad is fixedly embedded on the outside of the knob.

[0010] Preferably, one side of the protective plate extends into the interior of the slot.

[0011] Preferably, the bottom thread of the bone screw penetrates the motherboard.

[0012] Preferably, the top of the protective plate is provided with a positioning groove that is compatible with the positioning bolt.

[0013] Compared with the prior art, the beneficial effects of this utility model are: In this invention, a forward-rotating knob drives a worm gear to rotate, which in turn drives a matching worm wheel to rotate. The worm wheel then drives a bidirectional lead screw to rotate, which in turn drives the main plates on the left and right sides, connected to each other, to move away from each other. Through the bidirectional lead screw and worm wheel transmission system, the spacing between the main plates can be quickly adjusted to meet the fixation needs of different fracture sites, significantly improving surgical efficiency.

[0014] In this invention, after the bone screws are fixed, the left protective plate is pushed to the right and the right protective plate is pushed to the left to cover the slot. Then, the positioning bolts are rotated clockwise to fix the protective plates, which can protect the nail heads and improve the safety of the operation. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a fracture end reduction locking nail device proposed in this utility model; Figure 2This is a cross-sectional structural diagram of a fracture end reduction locking nail device proposed in this utility model; Figure 3 This is a top sectional view of the fracture reduction locking nail device proposed in this utility model; Figure 4 for Figure 2 A magnified view of part A in the middle; Figure 5 for Figure 2 A magnified view of part B in the middle section.

[0016] In the diagram: 1. Box body; 2. Two-way lead screw; 3. Worm gear; 4. Worm; 5. Knob; 6. Anti-slip pad; 7. Limiting rod; 8. Main board; 9. Threaded hole; 10. Sliding hole; 11. Bone nail; 12. Slot hole; 13. Nail head; 14. Protective plate; 15. Positioning bolt; 16. Positioning slot. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figure 1-5 A fracture reduction and locking device includes a housing 1. A bidirectional screw rod 2 is provided in the inner cavity of the housing 1. A worm gear 3 is fixedly sleeved in the middle of the outer side of the bidirectional screw rod 2. A worm 4 adapted to the worm gear 3 is rotatably connected to the bottom of the inner cavity of the housing 1. Limiting rods 7 are fixedly installed on the front and rear sides of the inner cavity of the housing 1. Main plates 8 are provided on the left and right sides of the housing 1. A slot 12 is opened on the top of the main plate 8. A nail head 13 is provided at the bottom of the inner cavity of the slot 12. A bone nail 11 is provided at the bottom of the nail head 13. A protective plate 14 is provided on one side of the main plate 8. A positioning bolt 15 is provided on the top of the main plate 8.

[0019] In this embodiment, the middle end of the bidirectional lead screw 2 is rotatably connected to the inner wall of the housing 1. The inner cavity of the main board 8 is provided with a threaded hole 9. The two ends of the bidirectional lead screw 2 are respectively connected to the interior of the main board 8 through the threaded hole 9 and threadedly engaged with the main board 8. The left and right sides of the limiting rod 7 extend into the interior of the main board 8. The front and rear sides of the inner cavity of the main board 8 are provided with sliding holes 10 that are adapted to the limiting rod 7. The inner wall of the sliding hole 10 slides in contact with the outer side of the limiting rod 7. Through the mutual cooperation of the limiting rod 7 and the sliding hole 10, the main board 8 on the left and right sides can be limited, which improves the stability of the main board 8 in use.

[0020] In this embodiment, the top of the worm gear 4 passes through the housing 1 and is fixed with a knob 5. An anti-slip pad 6 is fixedly embedded on the outside of the knob 5. One side of the protective plate 14 extends into the interior of the slot 12. The bottom of the bone nail 11 is threaded through the main plate 8. The top of the protective plate 14 is provided with a positioning groove 16 that matches the positioning bolt 15. The anti-slip pad 6 increases the friction between the user's hand and the knob 5, making it easier to rotate the worm gear 4.

[0021] In this embodiment, during use, the knob 5 is rotated forward, which drives the worm gear 4 to rotate. The worm gear 4 drives the matching worm wheel 3 to rotate, and the worm wheel 3 drives the bidirectional lead screw 2 to rotate. The bidirectional lead screw 2 drives the main plates 8 connected to the left and right sides to move away from each other, which facilitates the adjustment of the length of the main plates 8 according to needs. This allows for timely adaptation to different operating environments and improves the efficiency of surgical treatment. After fixing the bone nail 11, the left protective plate 14 is pushed to the right and the right protective plate 14 is pushed to the left, so that the protective plate 14 covers the slot 12. Then, the positioning bolt 15 is rotated forward to fix the protective plate 14, which can protect the nail head 13 and prevent the nail head 13 from being accidentally touched.

[0022] The foregoing has provided a detailed description of a fracture reduction and locking device according to this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A fracture reduction and locking device, comprising a housing (1), characterized in that: The inner cavity of the box body (1) is provided with a two-way lead screw (2), and a worm gear (3) is fixedly sleeved on the middle of the outer side of the two-way lead screw (2). The bottom of the inner cavity of the box body (1) is rotatably connected with a worm gear (4) that is compatible with the worm gear (3). Limiting rods (7) are fixedly installed on both the front and rear sides of the inner cavity of the box body (1). The left and right sides of the box body (1) are provided with main plates (8). The top of the main plate (8) is provided with a slot (12). The bottom of the inner cavity of the slot (12) is provided with a nail head (13). The bottom of the nail head (13) is provided with a bone nail (11). A protective plate (14) is provided on one side of the main plate (8). A positioning bolt (15) is provided on the top of the main plate (8).

2. The fracture end reduction locking device according to claim 1, characterized in that: The middle end of the bidirectional lead screw (2) is rotatably connected to the inner wall of the box (1). The inner cavity of the main board (8) is provided with a threaded hole (9). The two ends of the bidirectional lead screw (2) are respectively connected to the inside of the main board (8) and threadedly connected to the main board (8) through the threaded hole (9).

3. The fracture reduction locking device according to claim 1, characterized in that: The left and right sides of the limiting rod (7) extend into the interior of the main board (8). The front and rear sides of the inner cavity of the main board (8) are provided with sliding holes (10) that are adapted to the limiting rod (7). The inner wall of the sliding hole (10) slides in contact with the outer side of the limiting rod (7).

4. The fracture reduction locking device according to claim 1, characterized in that: The top of the worm gear (4) passes through the box (1) and is fixed with a knob (5), and an anti-slip pad (6) is fixedly embedded on the outside of the knob (5).

5. A fracture reduction locking device according to claim 1, characterized in that: One side of the protective plate (14) extends into the interior of the slot (12).

6. A fracture reduction locking device according to claim 1, characterized in that: The bottom thread of the bone nail (11) penetrates the main plate (8).

7. A fracture reduction locking device according to claim 1, characterized in that: The top of the protective plate (14) is provided with a positioning groove (16) that is compatible with the positioning bolt (15).

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