Fastening nail for minimally invasive surgery

Abstract

The utility model relates to the technical field of surgical fixing nails, and discloses a fixing nail for minimally invasive surgery, which comprises a fixing nail body and a nail cap fixedly mounted at one end of the fixing nail body, and one end of the fixing nail body is provided with a threaded groove. A drill bit can be installed or a flat-head fixing nail body can be used according to requirements, when the fixing nail does not need the drill bit, the multiple sliding blocks can be automatically pushed to the threaded groove along the connecting rod under the action of the first spring, the multiple sliding blocks can drive the middle movable assembly to move at the same time when sliding along the connecting rod, and therefore the drill bit is not needed. According to the fixing nail for the minimally invasive surgery, when a drill bit does not need to be used, the movable assembly can be automatically pushed to block the threaded groove, and the movable assembly can be automatically pushed to block the threaded groove when the drill bit does not need to be used; and sundries can be prevented from entering the fixing nail body to infect a wound when the fixing nail is used.

Description

Technical Field

[0001] This utility model relates to the field of surgical fixation nail technology, specifically a fixation nail for minimally invasive surgery. Background Technology

[0002] Fixation pins are orthopedic surgical instruments used to stabilize bone position during fracture or bone correction surgery. Materials include stainless steel, titanium alloy, and absorbable types. Structurally, they consist of a head, a rod, and a tail. Types include needle-like pins, screws, and bone plates.

[0003] For example, a spinal fixation screw with announcement number CN214966478U includes two screw rods and a positioning sleeve assembly disposed between the two screw rods. The positioning sleeve assembly includes a base rod and connecting sleeves disposed at both ends of the base rod. The two connecting sleeves are respectively fitted onto the top ends of the two screw rods. Each end of the base rod has an inner groove, and the inner groove is provided with a spring and an inner slider. The connecting sleeve has an end groove corresponding to the inner groove, and the inner side of the end groove is provided with an end locking block. Through the inner groove, spring, inner slider, end groove, end locking block, connecting rod, annular groove, pry sleeve, side slider, and side slide, the surgical fixation screw can be stably connected to the positioning sleeve assembly without affecting the normal screwing in of the surgical fixation screw. This ensures that the two surgical fixation screws are well positioned and aligned during installation, improving the installation accuracy and stability of the surgical fixation screw.

[0004] The aforementioned patent allows for the removal or retention of the nail head depending on the actual installation situation and requirements. However, when the nail head is not needed, the part where the nail head is installed has a hollow structure. When installed in the patient's body, it is easy for blood clots or other debris to enter the hollow area, which can easily cause infection and inflammation in the patient's body. Therefore, it still has some inconvenience in actual use.

[0005] Therefore, we propose a fixation nail for minimally invasive surgery to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a fixation nail for minimally invasive surgery to solve the problem mentioned in the background art where, when the nail head is not needed, the part where the nail head is installed has a hollow structure. When installed in the patient's body, blood clots or other debris can easily enter the hollow area, which can easily cause infection and inflammation in the patient's body. Therefore, it still has certain inconveniences in actual use.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a fixation nail for minimally invasive surgery, comprising a fixation nail body and a nail head fixedly installed at one end of the fixation nail body. One end of the fixation nail body has a threaded groove, and the interior of the fixation nail body has an installation groove. A plurality of connecting grooves are formed on one side of the installation groove. A connecting rod is fixedly installed between the sidewall of the plurality of connecting grooves and the inner wall of the installation groove. A slider is slidably installed on each of the plurality of connecting rods. A spring is fixedly installed between the sidewall of the slider and the inner wall of the connecting groove. The spring is sleeved on the outside of the connecting rod. A movable component is provided between the plurality of sliders.

[0008] Preferably, a screw is threaded into the threaded groove, and a drill bit is fixedly mounted on one end of the screw.

[0009] Preferably, the movable component includes a movable block fixedly installed between several sliders, the inner wall of the movable block having a groove, and a rotating rod rotatably installed in the groove.

[0010] Preferably, a fixing rod is fixedly installed on both side walls of the rotating rod, and a sliding rod is slidably installed inside each fixing rod. A spring is fixedly installed between the inner wall of the sliding rod and the inner wall of the fixing rod.

[0011] Preferably, the side wall of the movable block is provided with a slot, and both sides of the threaded groove are provided with inclined grooves, and the slide rod is slidably connected in the inclined groove.

[0012] Preferably, a second slot is provided on one side of the rotating rod, and an operating rod is fixedly installed between the two side walls of the second slot.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. When using this minimally invasive surgical fixation pin, a drill bit can be installed or a flat-headed fixation pin body can be used as needed. When the fixation pin does not require a drill bit, multiple sliders can be automatically pushed along the connecting rod to the threaded groove under the action of spring one. When the multiple sliders slide along the connecting rod, they can drive the middle movable component to move simultaneously. When the sliders are pushed by spring one to the maximum distance they can move, the movable component slides in the threaded groove and seals the threaded groove. When the minimally invasive surgical fixation pin does not require the use of a drill bit, it can automatically push the movable component to block the threaded groove, which can prevent foreign objects from entering the fixation pin body and causing infection of the wound during use.

[0015] 2. With the cooperation of the inclined groove, nail head, drill bit, screw, movable block, slide, rotating rod, fixed rod, slide rod, spring two, slot one, slot two and operating rod, this device can seal the threaded groove at one end of the fixed nail body when the drill bit is not needed. The movable block can be adjusted to make it openable or blocked. In the blocked state, it can prevent foreign objects from entering the interior of the fixed nail body. In the open state, the drill bit can be installed, making it more flexible to use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall cross-sectional three-dimensional structure of this utility model;

[0018] Figure 3 This is a cross-sectional three-dimensional structural diagram of the movable component system of this utility model;

[0019] Figure 4 This is a three-dimensional cross-sectional view of the inclined groove system of this utility model;

[0020] Figure 5 For the present utility model Figure 3 Enlarged 3D structural diagram at point A.

[0021] In the diagram: 1. Fixing nail body; 11. Threaded groove; 12. Mounting groove; 13. Connecting groove; 14. Slider; 15. Spring 1; 16. Connecting rod; 17. Inclined groove; 2. Nail head; 3. Drill bit; 31. Screw; 4. Movable component; 41. Movable block; 42. Slide groove; 43. Rotating rod; 44. Fixing rod; 45. Slide rod; 46. Spring 2; 47. Slot 1; 48. Slot 2; 49. Operating rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1: Please refer to Figure 1 - Figure 3A fixation pin for minimally invasive surgery includes a fixation pin body 1 and a pin cap 2 fixedly installed at one end of the fixation pin body 1. One end of the fixation pin body 1 has a threaded groove 11, and the inside of the fixation pin body 1 has an installation groove 12. A plurality of connecting grooves 13 are provided on one side of the installation groove 12. A connecting rod 16 is fixedly installed between the side wall of the plurality of connecting grooves 13 and the inner wall of the installation groove 12. A slider 14 is slidably installed on each of the plurality of connecting rods 16. A spring 15 is fixedly installed between the side wall of the slider 14 and the inner wall of the connecting groove 13. The spring 15 is sleeved on the outside of the connecting rod 16. A movable component 4 is provided between the plurality of sliders 14.

[0024] In this embodiment: When using the minimally invasive surgical fixation nail, a drill bit 3 can be installed or a flat-headed fixation nail body 1 can be used as needed. When the fixation nail does not require the drill bit 3, multiple sliders 14 can be automatically pushed along the connecting rod 16 to the threaded groove 11 under the action of spring 15. When the multiple sliders 14 slide along the connecting rod 16, they can drive the middle movable component 4 to move simultaneously. When the sliders 14 are pushed to the maximum distance that can be moved by spring 15, the movable component 4 slides in the threaded groove 11 and blocks the threaded groove 11. When the minimally invasive surgical fixation nail does not require the use of the drill bit 3, the movable component 4 can be automatically pushed to block the threaded groove 11, which can prevent foreign objects from entering the fixation nail body 1 and causing infection of the wound during use.

[0025] Example 2: This example is an improvement on Example 1. For details, please refer to [link / reference]. Figure 2 - Figure 5 A screw 31 is installed in the internal thread of the threaded groove 11. A drill bit 3 is fixedly installed at one end of the screw 31. The drill bit 3 can be fixedly set at one end of the fixing nail body 1 through the screw 31.

[0026] The movable component 4 includes a movable block 41 fixedly installed between several sliders 14. The inner wall of the movable block 41 is provided with a groove 42, and a rotating rod 43 is rotatably installed in the groove 42. The rotating rod 43 can rotate inside the movable block 41.

[0027] Fixed rods 44 are fixedly installed on both sides of the rotating rod 43. Sliding rods 45 are slidably installed inside the fixed rods 44. Spring 46 is fixedly installed between the inner wall of the sliding rod 45 and the inner wall of the fixed rod 44. In the initial state, the sliding rod 45 is stored inside the fixed rod 44.

[0028] The side wall of the movable block 41 is provided with a slot 47, and the two side walls of the threaded groove 11 are provided with inclined grooves 17. The sliding rod 45 is slidably connected in the inclined groove 17. When the rotating rod 43 rotates, it can drive the fixed rod 44 and the sliding rod 45 of the side wall to rotate together along the inner wall of the sliding groove 42, and can slide along the slot 47 into the inclined groove 17 when rotating.

[0029] A slot 48 is provided on one side of the rotating rod 43. An operating rod 49 is fixedly installed between the two side walls of the slot 48. The rotating rod 43 can be rotated by the operating rod 49, and the sliding rod 45 can be slid into the inclined groove 17.

[0030] In this embodiment: when the drill bit 3 is needed, the screw 31 can be screwed into the threaded groove 11 first. When the screw 31 is screwed into the threaded groove 11, it will contact the movable block 41, pushing the movable block 41 into the interior of the fixing nail body 1. When pushing, the slider 14 provided on the side will slide along the connecting rod 16 until the drill bit 3 is rotated to... Figure 1 Figure 2 The position shown is correct. At this point, multiple springs 15 are compressed. When the drill bit 3 is not needed, the screw 31 can be unscrewed along the thread groove 11. When there is no pressure from the screw 31, the multiple springs 15 can automatically push the movable block 41 towards the thread groove 11. When the screw 31 is removed, the movable block 41 also slides to the position of the thread groove 11. At this time, the operating lever 49 can be rotated. When the operating lever 49 rotates, it drives the rotating rod 43 to rotate in the slide groove 42. The rotation of the rotating rod 43 drives the fixed rod 44 and the slide rod 4 on its side wall. 5. When rotating together, the slide rod 45 slides along the slot 47 on the side wall to the position of the inclined groove 17. At this time, under the action of the spring 46, the slide rod 45 is pushed out and slid into the inclined groove 17, which can limit the movement block 41. When the drill bit 3 is not needed, the device can block the threaded groove 11 at one end of the fixed nail body 1, and adjust the movement block 41 to make it openable or blocked. In the blocked state, it can prevent foreign objects from entering the interior of the fixed nail body 1. In the open state, the drill bit can be installed, which is more flexible to use.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fixation nail for minimally invasive surgery, comprising a fixation nail body (1) and a nail cap (2) fixedly installed at one end of the fixation nail body (1), characterized in that: One end of the fixing nail body (1) is provided with a threaded groove (11), and the inside of the fixing nail body (1) is provided with an installation groove (12). A plurality of connecting grooves (13) are provided on one side of the installation groove (12). A connecting rod (16) is fixedly installed between the side wall of the plurality of connecting grooves (13) and the inner wall of the installation groove (12). A slider (14) is slidably installed on each of the plurality of connecting rods (16). A spring (15) is fixedly installed between the side wall of the slider (14) and the inner wall of the connecting groove (13). The spring (15) is sleeved on the outside of the connecting rod (16). A movable component (4) is provided between the plurality of sliders (14).

2. The fixation nail for minimally invasive surgery according to claim 1, characterized in that: A screw (31) is threaded into the internal thread of the threaded groove (11), and a drill bit (3) is fixedly installed at one end of the screw (31).

3. The fixation nail for minimally invasive surgery according to claim 1, characterized in that: The movable component (4) includes a movable block (41) fixedly installed between several sliders (14). The inner wall of the movable block (41) is provided with a groove (42), and a rotating rod (43) is rotatably installed in the groove (42).

4. The fixation nail for minimally invasive surgery according to claim 3, characterized in that: Fixed rods (44) are fixedly installed on both sides of the rotating rod (43). Sliding rods (45) are slidably installed inside the fixed rods (44). A spring (46) is fixedly installed between the inner wall of the sliding rod (45) and the inner wall of the fixed rod (44).

5. The fixation nail for minimally invasive surgery according to claim 4, characterized in that: The side wall of the movable block (41) is provided with a slot (47), and the two side walls of the threaded groove (11) are provided with inclined grooves (17), and the slide rod (45) is slidably connected in the inclined groove (17).

6. The fixation nail for minimally invasive surgery according to claim 5, characterized in that: A slot two (48) is provided on one side of the rotating rod (43), and an operating rod (49) is fixedly installed between the two side walls of the slot two (48).

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