Combined spinal cord fixing nail
The design of the modular spinal cord fixation nail solves the problems of unreliable connection between the spinal cord fixation nail and the vertebral rod and inconvenient angle adjustment, achieving a stable and detachable connection and flexible angle adjustment, thus improving the stability and flexibility of the osteopathic system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU ANGEL MEDICAL INSTR
- Filing Date
- 2025-03-11
- Publication Date
- 2026-04-24
AI Technical Summary
The existing spinal fixation nails are not securely connected to the vertebral rods and the angle adjustment is inconvenient, which affects the stability and flexibility of the osteopathic system.
A modular spinal fixation nail was designed, comprising a detachable fixation nail body and a nail head. The detachable nail head is connected to the vertebral rod, and a stable connection is achieved using clamping blocks and fastening discs. The spherical connection between the connector and the end allows for angle adjustment.
It achieves a stable and detachable connection between the fixation pin and the vertebral rod, ensuring the reliability of the connection, and allows for easy adjustment of the angle of the vertebral rod to meet different osteopathic needs.
Smart Images
Figure CN224155743U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical devices for bone setting, and in particular to a combined spinal cord fixation nail. Background Technology
[0002] Orthopedic conditions often require chiropractic correction, which necessitates the use of assistive devices such as spinal fixation nails. Spinal fixation nails are typically surgically implanted into the spine to immobilize the injured area and maintain spinal stability, preventing fracture displacement and ensuring precise alignment of the fracture site, thus providing support and protection for spinal rehabilitation.
[0003] Spinal fixation nails, as medical bone-setting devices, are implanted into the human body to stabilize bones and promote normal bone growth. Many bone-setting systems consist of fixation nails and vertebral rods, therefore the fixation nails also need screw heads to connect to the vertebral rods. Conventional connection methods typically use screw plugs for locking, which are not very secure, and the screw heads are usually fixed to the nail body, making it inconvenient to adjust the angle of the vertebral rod. Utility Model Content
[0004] In view of this, the purpose of this utility model is to propose a combined spinal cord fixation nail to solve the problems of connection and angle adjustment between spinal cord fixation nails and vertebral rods in the prior art.
[0005] To achieve the above objectives, this utility model provides a combined spinal cord fixation nail, comprising a fixation nail body, wherein the fixation nail body consists of a lower screw and an upper end, and the spinal cord fixation nail further comprises:
[0006] A detachable nail head portion connected to the fixing nail body is used to connect the fixing nail body and the awl. The nail head portion includes a connector, and the side wall of the connector has a through awl mounting hole.
[0007] The clamping block, which is movably connected within the connector, is used to clamp and secure the vertebral rod that passes through the vertebral rod mounting hole.
[0008] Furthermore, the connector is a tubular component that runs vertically through the connector, and the diameter of the lower opening of the connector is smaller than the diameter of the upper opening of the connector. The lower opening of the connector and the connector form an inwardly recessed arc-shaped portion.
[0009] Furthermore, the end is a hemisphere with a flat upper surface, and the curvature of the spherical surface at the lower end of the end is the same as the curvature of the arc-shaped part at the lower end of the connector. The upper surface of the end is also provided with a screw slot.
[0010] Furthermore, the connector is provided with two symmetrical limiting grooves, which are vertically arranged on the inner wall of the connector. The clamping block has protrusions on both sides, which are located in the limiting grooves and slidably connected to them.
[0011] Furthermore, the clamping block is provided with an inwardly recessed arc-shaped groove, and the clamping block is provided with two parts, upper and lower, and the two clamping blocks are arranged in opposite positions with the arc-shaped groove.
[0012] Furthermore, a fastening circular plate is provided inside the upper opening of the connector. A thread is provided on the outer side wall of the fastening circular plate, and an internal thread that matches it is also provided at the upper opening of the connector. The two are threadedly connected, and a cross groove is also provided on the upper surface of the fastening circular plate.
[0013] Furthermore, the lower section of the fastening circular plate is provided with a permanent magnet, the upper end face of the upper clamping block is magnetically attracted to the fastening circular plate, and the lower clamping block is pressed against the upper end of the end.
[0014] Furthermore, the upper end of the connector is provided with two collinear slots.
[0015] The beneficial effects of this utility model are as follows: 1. By setting a detachable fixation nail body and nail head, the device can be disassembled and used as needed. When only the fixation nail needs to be used to fix the injured area, the nail head can be removed. The entire fixation nail body consists of a screw at the bottom and an end at the top. The upper end face of the end has a screw slot, which can be used with tools to drive the screw part of the fixation nail body into the spine. When it is necessary to use it in conjunction with a vertebral rod for bone setting, the nail head can be attached.
[0016] 2. The nail head mainly consists of a connector and clamping blocks inside the connector. The connector has a through-hole for mounting the vertebral rod on its side wall, allowing the vertebral rod to pass through and be clamped and fixed by the clamping blocks. A fastening plate is also located at the upper opening of the connector, threaded to the connector. Of the two clamping blocks, the upper clamping block is magnetically attached to the fastening plate, while the lower clamping block presses against the end. Therefore, simply tightening the fastening plate forces the upper clamping block down, which, in conjunction with the fixed lower clamping block, clamps and secures the vertebral rod, ensuring stability and reliability.
[0017] 3. The lower opening of the connector is an inwardly curved part, while the end of the fixing nail body is a hemisphere, and the curvature of the lower spherical surface of the end is the same as the curvature of the lower curved part of the connector. Therefore, the spherical connection allows the fixing nail body and the connector to rotate, thus making it easy to adjust the angle of the awl after it is installed. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model.
[0020] Figure 2 This is a top-view structural diagram of the device of this utility model.
[0021] Figure 3 This is a schematic diagram of the structure of the fixing nail body in the device of this utility model.
[0022] Figure 4 This is a schematic diagram of the internal structure of the device of this utility model.
[0023] The diagram is marked as follows:
[0024] 101. Fixing nail body; 102. End; 103. Screw slot; 104. Connector; 105. Awl mounting hole; 106. Slotted groove; 107. Fastening round plate; 108. Cross groove; 109. Clamping block; 110. Limiting groove. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.
[0026] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0027] The first aspect of this utility model is as follows: Figure 1 , Figure 2 and Figure 3As shown, osteopathic systems often require a combination of fixation pins and vertebral rods. However, sometimes only fixation pins are needed to fix the bone at the injured site. Therefore, this embodiment includes a fixation pin body 101 and a pin head portion, which is detachably connected to the fixation pin body 101. The pin head portion is used to connect the fixation pin body 101 and the vertebral rod.
[0028] Specifically, the nail head includes a connector 104, which is a tubular component extending vertically. The diameter of the lower opening of the connector 104 is smaller than the diameter of the upper opening, and there is an inwardly recessed arc-shaped portion between the lower opening and the connector 104. Correspondingly, the fixing nail body 101 consists of a lower screw and an upper end 102. The end 102 is a hemisphere with a flat upper surface, and the curvature of the lower spherical surface of the end 102 is the same as the curvature of the lower arc-shaped portion of the connector 104.
[0029] Preferably, the upper end face of the end 102 is also provided with a screw slot 103.
[0030] Therefore, when only fixation pins are needed to immobilize the injured area, the pin head can be removed. The entire fixation pin body 101 consists of a lower screw and an upper end 102. The upper surface of the end 102 has a screw slot 103, which can be used with tools to drive the screw portion of the fixation pin body 101 into the spine. When it is necessary to use it in conjunction with a vertebral rod for bone setting, the pin head can be attached.
[0031] When installing the retaining screw body 101 and the connector 104, the retaining screw body 101 is passed through the connector 104 from top to bottom. Since the size of the end portion 102 in the retaining screw body 101 is larger than the lower opening of the connector 104, the screw portion in the retaining screw body 101 will eventually protrude from the lower opening of the connector 104, while the end portion 102 will be stuck inside the connector 104.
[0032] Furthermore, since the spherical curvature of the lower end of the end 102 is the same as the curvature of the lower end of the connector 104, the spherical connection allows the fixing nail body 101 and the connector 104 to rotate, thus making it convenient to adjust the angle of the vertebra after it is installed.
[0033] Preferably, the upper end of the connector 104 is also provided with two collinear slots 106. When it is necessary to adjust the angle of the awl, a tool can be used to insert into the slot 106, and then the connector 104 can be rotated, which is simple and convenient.
[0034] The second aspect of this utility model is as follows: Figure 1 , Figure 2 and Figure 4As shown, after the screw head and the fixation screw body 101 are used together to form an osteopathic system, it is also necessary to ensure that the connection between the screw head and the vertebral rod is secure. To address this, this embodiment uses a clamping block 109 within the connector 104 to clamp and fix the vertebral rod.
[0035] The clamping block 109 has two parts, upper and lower, and is movably connected to the connector 104. The clamping block 109 is a square plate-shaped piece with an inwardly recessed arc groove. The two clamping blocks 109 are arranged with the arc groove facing each other.
[0036] Additionally, the side wall of the connector 104 is provided with a through-hole vertebra rod mounting hole 105 for allowing the vertebra rod to pass through the connector.
[0037] The upper opening of the connector 104 is also provided with a fastening circular plate 107. The outer wall of the fastening circular plate 107 is provided with a thread, and the upper opening of the connector 104 is also provided with an internal thread that matches it. The two are threadedly connected, and the upper surface of the fastening circular plate 107 is also provided with a cross groove 108.
[0038] Preferably, the lower section of the fastening circular plate 107 is provided with a permanent magnet, the upper end face of the upper clamping block 109 is magnetically attracted to the fastening circular plate 107, and the lower clamping block 109 presses against the upper end of the end 102.
[0039] Therefore, the vertebral rod can pass through the vertebral rod mounting hole 105 and be clamped and fixed by the clamping block 109. The upper opening of the connector 104 is also equipped with a fastening circular plate 107, which is threadedly connected to the connector 104. Of the two clamping blocks 109, the upper clamping block 109 is magnetically attracted to the fastening circular plate 107, while the lower clamping block 109 presses against the end 102. Therefore, simply tightening the fastening circular plate 107 forces the upper clamping block 109 to descend, cooperating with the fixed lower clamping block 109 to clamp and fix the vertebral rod, ensuring stability and reliability.
[0040] In summary, this invention, by providing a detachable fixation nail body 101 and nail head, allows the device to be disassembled and used as needed. When only the fixation nail is needed to immobilize the injured area, the nail head can be removed. The entire fixation nail body 101 consists of a lower screw and an upper end 102. The upper surface of the end 102 has a screw slot 103, which can be used with tools to drive the screw portion of the fixation nail body 101 into the spine. When it is necessary to use it in conjunction with a vertebral rod for bone setting, the nail head can be attached.
[0041] The nail head mainly consists of a connector 104 and a clamping block 109 within the connector 104. The connector 104 has a through-hole vertebra rod mounting hole 105 on its side wall, allowing the vertebra rod to pass through and be clamped and fixed by the clamping block 109. A fastening circular plate 107 is also provided at the upper opening of the connector 104, threadedly connected to the connector 104. Of the two clamping blocks 109, the upper clamping block 109 is magnetically attached to the fastening circular plate 107, while the lower clamping block 109 presses against the end 102. Therefore, simply tightening the fastening circular plate 107 forces the upper clamping block 109 down, which, in conjunction with the fixed lower clamping block 109, clamps and fixes the vertebra rod, ensuring stability and reliability.
[0042] The lower opening of the connector 104 and the connector 104 form an inwardly recessed arc-shaped part, while the end 102 of the fixing nail body 101 is a hemisphere, and the arc of the lower spherical surface of the end 102 is the same as the arc of the lower arc-shaped part of the connector 104. Therefore, the spherical connection allows the fixing nail body 101 and the connector 104 to rotate, thus making it convenient to adjust the angle of the awl after it is installed.
[0043] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention includes the claims being limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.
[0044] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A combined spinal cord fixation nail, comprising a fixation nail body (101), said fixation nail body (101) consisting of a lower screw and an upper end (102), characterized in that, The spinal cord fixation nail also includes: The nail head portion is detachably connected to the fixing nail body (101) for connecting the fixing nail body (101) and the awl. The nail head portion includes a connector (104), and the side wall of the connector (104) is provided with a through awl mounting hole (105). A clamping block (109) is movably connected within the connector (104) for clamping and securing the vertebral rod passing through the vertebral rod mounting hole (105).
2. The combined spinal cord fixation nail according to claim 1, characterized in that, The connector (104) is a tubular part that runs vertically through the connector, and the diameter of the lower opening of the connector (104) is smaller than the diameter of the upper opening of the connector (104). The lower opening of the connector (104) and the connector (104) are connected by an inwardly recessed arc-shaped part.
3. The combined spinal cord fixation nail according to claim 2, characterized in that, The end (102) is a hemisphere with a flat upper surface, and the arc of the lower spherical surface of the end (102) is the same as the arc of the lower arc of the connector (104). The end (102) also has a screw slot (103) on its upper surface.
4. A combined spinal cord fixation nail according to claim 1 or 2, characterized in that, The connector (104) is also provided with two symmetrical limiting grooves (110). The limiting grooves (110) are vertically arranged on the inner wall of the connector (104). The clamping block (109) has protrusions on both sides of its side walls. The protrusions are located in the limiting grooves (110) and are slidably connected to them.
5. A combined spinal cord fixation nail according to claim 4, characterized in that, The clamping block (109) is provided with an inwardly recessed arc-shaped groove. The clamping block (109) is provided with two parts, upper and lower, and the two clamping blocks (109) are arranged in opposite positions with the arc-shaped groove.
6. A combined spinal cord fixation nail according to claim 5, characterized in that, The upper opening of the connector (104) is also provided with a fastening circular plate (107). The outer wall of the fastening circular plate (107) is provided with a thread, and the upper opening of the connector (104) is also provided with an internal thread that matches it. The two are threadedly connected. The upper surface of the fastening circular plate (107) is also provided with a cross groove (108).
7. A combined spinal cord fixation nail according to claim 6, characterized in that, The lower section of the fastening circular plate (107) is provided with a permanent magnet, the upper end face of the upper clamping block (109) is magnetically attracted to the fastening circular plate (107), and the lower clamping block (109) is pressed against the upper end of the end (102).
8. A combined spinal cord fixation nail according to claim 1, characterized in that, The upper end of the connector (104) is also provided with two collinear slots (106).