A bone peg fixation device

Abstract

The application relates to the technical field of medical products, and discloses a bone nail fixing device. The bone nail fixing device is used for fixing a bone nail, and the bone nail fixing device comprises a nail fixing main body and a supporting shell. The nail fixing main body is sequentially provided with a guide channel and a nail clamping section. The guide channel is used for allowing a tool to pass through, and the nail clamping section is used for clamping the bone nail. The bone nail can be separated from the nail clamping section under the action of the tool. One end of the supporting shell is connected to the nail fixing main body, and the other end of the supporting shell extends beyond the nail clamping section. The application realizes the fixation of the bone nail before implantation, does not need manual holding, reduces the operation difficulty, and improves the operation success rate. Furthermore, the supporting shell is arranged, on one hand, the bone nail is convenient to adjust, so as to be aligned with a to-be-installed position; and on the other hand, the problem that the fixing precision of the bone nail fixing device is poor when the bone nail fixing device is used for installing the bone nail in a suspended state is solved, the skew phenomenon of the bone nail is prevented, and the installation precision of the bone nail is improved.

Description

Technical Field

[0001] This application relates to the field of medical product technology, and in particular to a bone screw fixation device. Background Technology

[0002] In the field of neurosurgery, procedures such as DBS (deep brain stimulation) and cranioplasty are common. In these surgeries, the implantation and fixation of small-sized bone screws are crucial. Due to their precise fit, small-sized bone screws can firmly fix the implant to the skull and other skeletal structures, ensuring surgical outcomes and patient recovery.

[0003] However, the current bone screw installation process presents numerous inconveniences. In practice, the surgeon must first hold the bone screw and then use a screwdriver to precisely screw it into the pre-set fixing hole. However, in the surgical environment, the surgeon must wear gloves. The thickness and material of the gloves greatly reduce the tactile sensitivity and dexterity of the hands, making it difficult for the surgeon to hold the small bone screw firmly, and bone screws frequently fall out. Once a bone screw falls out, it not only delays the surgical process but may also lead to contamination from pollutants in the operating room environment, increasing the patient's risk of postoperative infection.

[0004] Therefore, there is an urgent need for a bone screw fixation device to solve the aforementioned problems. Utility Model Content

[0005] Based on the above, the purpose of this application is to provide a bone screw fixation device that achieves fixation of the bone screw before implantation, eliminating the need for manual handling, reducing surgical difficulty, improving surgical success rate, making the bone screw easy to adjust to align with the installation position, preventing bone screw misalignment, and improving the installation accuracy of the bone screw.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] A bone screw fixation device for fixing bone screws, comprising:

[0008] The main body of the fixation nail has a guide channel and a clamping section arranged sequentially. The guide channel is used for the tool to pass through, and the clamping section is used to clamp the bone nail. The bone nail can be detached from the clamping section by the action of the tool.

[0009] A supporting shell, one end of which is connected to the nail body and the other end of which extends beyond the clamping section.

[0010] As a preferred technical solution for a bone screw fixation device, the supporting shell is disposed around a portion of the guide channel and the clamping segment, and is coaxial with and spaced apart from the portion of the guide channel and the clamping segment.

[0011] As a preferred technical solution for a bone screw fixation device, the other end of the support shell is provided with a support surface, which is used to press against the periphery of the position to be installed; when the clamping segment clamps the bone screw, the bone screw is located inside the support shell and the screw body does not protrude from the support surface; when the bone screw is detached from the clamping segment, the screw body is at least partially threaded to the position to be installed.

[0012] As a preferred technical solution of a bone screw fixation device, the clamping section includes a clamping hole and an extension channel. The guide channel, the clamping hole and the extension channel are sequentially connected and coaxially arranged. The clamping hole is used to clamp the head of the bone screw, and the extension channel is used to clamp the body of the bone screw.

[0013] As a preferred technical solution of a bone screw fixation device, the screw body is provided with a plurality of circumferentially spaced elastic arms and clamping plates extending from the ends of the elastic arms. The elastic arms extend along the axis of the guide channel, the plurality of elastic arms form part of the guide channel, and the plurality of clamping plates form the clamping segment.

[0014] As a preferred technical solution for a bone screw fixation device, two annular stop protrusions are provided at intervals on the inner wall of the clamping plate. The inner diameter of the two annular stop protrusions is smaller than the outer diameter of the bone screw head. A stop groove is formed between the two annular stop protrusions, and the stop groove is used to clamp the bone screw head.

[0015] As a preferred technical solution for a bone screw fixation device, the width of the clamping plate is greater than the width of the elastic arm, and the clamping plate extends from the end of the elastic arm toward the central axis, causing the diameter of the clamping hole to gradually decrease.

[0016] As a preferred technical solution for a bone screw fixation device, the end of the clamping plate is provided with a screw guard section, which extends parallel to the central axis.

[0017] As a preferred technical solution for a bone screw fixation device, the outer wall of the screw body is provided with a first anti-slip structure.

[0018] As a preferred technical solution for a bone screw fixation device, the first anti-slip structure includes multiple grooves or protrusions; or the first anti-slip structure includes anti-slip patterns.

[0019] As a preferred technical solution for a bone screw fixation device, the bone screw fixation device is made of transparent material.

[0020] As a preferred technical solution for a bone screw fixation device, the supporting shell and the screw body are integrally formed; or

[0021] The supporting shell is detachably connected to the fixing nail body.

[0022] As a preferred technical solution for a bone screw fixation device, the supporting shell is threaded, magnetically connected, or snap-fitted to the screw body.

[0023] As a preferred technical solution for bone screw fixation device, the supporting surface is provided with a second anti-slip structure.

[0024] The beneficial effects of this application are as follows:

[0025] This application provides a bone screw fixation device. In use, the clamping section holds the bone screw. The device is moved above the installation position, and the end of the supporting shell extending beyond the clamping section is pressed against the periphery of the installation position, aligning the bone screw with the position. Then, a tool passes through the guide channel and pushes the bone screw until it passes through the supporting shell and abuts the installation position. Finally, the tool is turned, disengaging the bone screw from the clamping section and completing the implantation. This application achieves fixation of the bone screw before implantation, eliminating the need for manual handling, reducing surgical difficulty, and improving the success rate. Furthermore, by providing the supporting shell, the bone screw is easily adjusted to align with the installation position. The supporting shell also supports the fixation device, solving the problem of poor accuracy when installing bone screws in a suspended state. When turning the screw, the fixation device remains in a stable position under the support of the shell, allowing the tool to move in one direction under the guidance of the guide channel, preventing the screw from tilting and improving installation accuracy. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this application and these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the bone screw fixation device provided in the specific embodiments of this application;

[0028] Figure 2 This is a structural cross-sectional view of the bone screw fixation device provided in a specific embodiment of this application;

[0029] Figure 3 This is a cross-sectional view of the bone screw fixation device provided in the specific embodiments of this application;

[0030] Figure 4 This is an exploded view of the bone nail fixation device provided in the specific embodiments of this application.

[0031] The markings in the image are as follows:

[0032] 100. Bone screws; 200. Tools;

[0033] 1. Fixing nail body; 11. Guide channel; 12. Nail clamping section; 121. Nail clamping hole; 1211. Annular stop protrusion; 1212. Stop groove; 122. Extension channel; 13. Elastic arm; 14. Nail clamping piece; 141. Nail guard section; 2. Support shell; 21. Support surface. Detailed Implementation

[0034] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present application, not the entire structure.

[0035] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0038] The technical field and related terms of the embodiments of this application are briefly described below.

[0039] Implantable medical systems include implantable neurostimulation systems, implantable cardiac stimulation systems (also known as pacemakers), implantable drug delivery systems (IDDS), and lead transfer systems. Examples of implantable neurostimulation systems include deep brain stimulation (DBS), cortical nerve stimulation (CNS), spinal cord stimulation (SCS), sacral nerve stimulation (SNS), and vagus nerve stimulation (VNS).

[0040] Implantable neurostimulation systems consist of a stimulator implanted in the patient's body (i.e., an implantable neurostimulator) and a programmed device placed outside the patient's body. In other words, the stimulator is a medical device, or medical devices include stimulators. Related neuromodulation techniques primarily involve stereotactic surgery to implant electrodes (e.g., electrode wires) at specific sites (target points) in the body's tissues. Discharge pulses are then delivered through these electrodes to the target points, modulating the electrical activity and function of corresponding neural structures and networks, thereby improving symptoms and alleviating pain.

[0041] As an example, a DBS includes an IPG (Implantable Pulse Generator), extension leads, and electrode leads. The IPG is connected to the electrode leads via the extension leads. The IPG is implanted in the patient's body, for example, in the chest or other internal locations.

[0042] As another example, DBS includes an IPG and electrode leads, with the IPG directly connected to the electrode leads. The IPG is implanted in the patient's head, for example, by creating a groove in the patient's skull and then placing the IPG in the groove. In this case, the IPG may not protrude from the outer surface of the skull, or it may protrude partially from the outer surface of the skull.

[0043] In this system, the IPG responds to programmed commands sent by a programmable device, relying on sealed batteries and circuits to provide controllable electrical stimulation therapy (or electrical stimulation energy) to tissues within the body. The IPG delivers one or more controllable specific electrical stimuli to specific areas of tissues within the body via electrode leads.

[0044] In some embodiments, the extension wire is used in conjunction with the IPG as a medium for transmitting electrical stimulation, thereby transmitting the electrical stimulation generated by the IPG to the electrode wire.

[0045] In some embodiments, electrical stimulation can be delivered in the form of a pulsed signal or a non-pulsed signal. For example, electrical stimulation can be delivered as a signal with various waveform shapes, frequencies, and amplitudes. Therefore, non-pulsed signal electrical stimulation can be a continuous signal, which can have a sinusoidal waveform or other continuous waveforms.

[0046] After receiving electrical stimulation from the IPG or extension leads, the electrode leads deliver the stimulation to specific areas of tissue within the body via multiple electrode contacts. The stimulator may have one or more electrode leads on one or both sides, with multiple electrode contacts on each lead. These contacts may be evenly or non-uniformly arranged circumferentially on the electrode leads. As an example, the electrode contacts may be arranged in a 4x3 array (a total of 12 contacts) circumferentially on the electrode leads. The electrode contacts may include stimulating electrode contacts and / or collecting electrode contacts. The electrode contacts may be in shapes such as sheet-like, ring-like, or dot-like.

[0047] In some embodiments, the stimulated tissue may be the patient's brain tissue, and the stimulated site may be a specific location within the brain tissue. Generally, the stimulated site differs depending on the patient's disease type, and the number of stimulation contacts (single-source or multi-source), the application of one or more specific electrical stimulation pathways (single-channel or multi-channel), and the stimulation parameters (values) also vary.

[0048] This application does not limit the applicable disease types, but can be any disease type applicable to deep brain stimulation (DBS), spinal cord stimulation (SCS), sacral nerve stimulation, gastric stimulation, peripheral nerve stimulation, or functional electrical stimulation. Among these, DBS can be used to treat or manage diseases including, but not limited to: spastic disorders (e.g., epilepsy), pain, migraines, mental illnesses (e.g., major depressive disorder (MDD)), bipolar disorder, anxiety disorders, post-traumatic stress disorder, mild depression, obsessive-compulsive disorder (OCD), behavioral disorders, mood disorders, memory disorders, mental state disorders, mobility disorders (e.g., essential tremor or Parkinson's disease), Huntington's disease, Alzheimer's disease, drug addiction, autism, or other neurological or psychiatric diseases and impairments.

[0049] In this embodiment of the application, when the programmable device and the stimulator establish a programmable connection, the programmable device can be used to adjust one or more stimulation parameters of the stimulator (or one or more stimulation parameters of the pulse generator, with different stimulation parameters corresponding to different electrical stimuli). Alternatively, the stimulator can sense the patient's electrophysiological activity to collect electrophysiological signals, and the collected electrophysiological signals can be used to continue adjusting the stimulation parameters of the stimulator to achieve closed-loop control (or adaptive adjustment) of the stimulation parameters.

[0050] Stimulation parameters may include at least one of the following: electrode contact identification for delivering electrical stimulation (e.g., electrode contact #2 and electrode contact #3), frequency (e.g., the number of electrical stimulation pulse signals per second, in Hz), pulse width (duration of each pulse, in μs), amplitude (generally expressed as voltage, i.e., the intensity of each pulse, in V), timing (e.g., continuous or bursty, bursty refers to discontinuous timing behavior composed of multiple processes), stimulation mode (including one or more of current mode, voltage mode, timed stimulation mode, and cyclic stimulation mode), physician control upper and lower limits (the range that the physician can adjust), and patient control upper and lower limits (the range that the patient can adjust independently).

[0051] In some embodiments, the stimulation parameters of the stimulator can be adjusted in current mode or voltage mode.

[0052] Programmable devices can include physician-controlled devices (i.e., devices used by physicians) and / or patient-controlled devices (i.e., devices used by patients). Physician-controlled devices are, for example, smart terminal devices such as tablets, laptops, desktop computers, and mobile phones equipped with programming software. Patient-controlled devices are, for example, smart terminal devices such as tablets, laptops, desktop computers, and mobile phones equipped with programming software; patient-controlled devices can also be other electronic devices with programming functions (e.g., chargers with programming functions, electrophysiological acquisition devices, etc.).

[0053] like Figures 1-3 As shown, this embodiment provides a bone screw fixation device, which includes a screw fixation body 1 and a support shell 2. The screw fixation body 1 is sequentially provided with a guide channel 11 and a clamping section 12. The guide channel 11 is used for a tool 200 to pass through, and the clamping section 12 is used to clamp the bone screw 100. The bone screw 100 can be detached from the clamping section 12 under the action of the tool 200. One end of the support shell 2 is connected to the screw fixation body 1, and the other end is provided with a support surface 21, which is used to press against the periphery of the installation position. When the clamping section 12 clamps the bone screw 100, the bone screw 100 is located inside the support shell 2, and the screw body of the bone screw 100 does not protrude from the support surface 21. When the bone screw 100 is detached from the clamping section 12, at least part of the screw body is threadedly connected to the installation position. In this embodiment, the tool 200 can be a screwdriver.

[0054] In use, the clamping segment 12 holds the bone screw 100, and the bone screw fixation device is moved above the installation position. The end of the supporting shell 2 extending beyond the clamping segment 12 is pressed against the periphery of the installation position, aligning the bone screw 100 with the installation position. Then, the tool 200 passes through the guide channel 11 and pushes the bone screw 100 until it passes through the supporting shell 2 and abuts against the installation position. The tool 200 then twists the bone screw 100, disengaging it from the clamping segment 12 and completing the implantation. This embodiment achieves fixation of the bone screw 100 before implantation, eliminating the need for manual handling, reducing surgical difficulty, and improving the success rate of the surgery. Furthermore, by providing the supporting shell 2, on the one hand, the bone screw 100 is easy to adjust to align with the installation position; on the other hand, the supporting shell 2 can support the bone screw fixing device, solving the problem of poor accuracy when installing the bone screw 100 in a suspended state. When the bone screw 100 is turned, the position of the bone screw fixing device remains unchanged under the support of the supporting shell, and the tool 200 can move in one direction under the guidance of the guide channel 11, preventing the bone screw 100 from tilting and improving the installation accuracy of the bone screw 100. In this embodiment, the clamping section 12 is elastic, and when the bone screw 100 is turned, the bone screw 100 can disengage from the elastic clamping section 12.

[0055] Preferably, the support shell 2 is disposed around the part of the guide channel 11 and the clamping section 12, and is coaxial with and spaced apart from the part of the guide channel 11 and the clamping section 12. Therefore, the center of the support shell 2 is the position to be installed, reducing the difficulty of aligning the bone screw 100 with the position to be installed.

[0056] Furthermore, the other end of the supporting shell 2 is provided with a supporting surface 21, which is used to press against the periphery of the installation position. When the clamping section 12 clamps the bone screw 100, the bone screw 100 is located inside the supporting shell 2, and the screw body of the bone screw 100 does not protrude from the supporting surface 21. When the bone screw 100 is released from the clamping section 12, at least part of the screw body is threadedly connected to the installation position. During the process of turning the bone screw 100, the supporting surface 21 supports the bone screw fixing device to improve stability. When the bone screw 100 is released from the clamping section 12, at least part of the screw body is threadedly connected to the installation position, thus fixing the bone screw 100.

[0057] Preferably, the clamping section 12 includes a clamping hole 121 and an extension channel 122. The guide channel 11, the clamping hole 121 and the extension channel 122 are connected in sequence and coaxially arranged. The clamping hole 121 is used to clamp the head of the bone screw 100, and the extension channel 122 is used to clamp the body of the screw, so that the axis of the bone screw 100 can be collinear with the axis of the tool 200, and the bone screw 100 can always be centered when it is screwed.

[0058] In this embodiment, the fixation nail body 1 is provided with a plurality of circumferentially spaced elastic arms 13 and clamping plates 14 extending from the ends of the elastic arms 13. The elastic arms 13 extend along the axis of the guide channel 11, and the plurality of elastic arms 13 form part of the guide channel 11. The plurality of clamping plates 14 form a clamping section 12. The elastic arms 13 enable the clamping section 12 to generate elastic deformation so that the bone nail 100 can be clamped by the clamping section 12. When the bone nail 100 moves downward, the spacing between the plurality of elastic arms 13 increases to facilitate the passage of the bone nail 100.

[0059] Specifically, two annular stop protrusions 1211 are spaced apart on the inner wall of the clamping plate 14. The inner diameter of the two annular stop protrusions 1211 is smaller than the outer diameter of the head of the bone screw 100. A stop groove 1212 is formed between the two annular stop protrusions 1211. The stop groove 1212 is used to clamp the head of the bone screw 100 and can limit the head of the bone screw 100 to prevent the bone screw 100 from moving after being installed, thus achieving the clamping of the head of the bone screw 100.

[0060] Preferably, the width of the clamping piece 14 is greater than the width of the elastic arm 13. The clamping piece 14 extends from the end of the elastic arm 13 toward the central axis, so that the diameter of the clamping hole 121 gradually decreases. The elastic arm 13 is narrower, which facilitates elastic deformation. The clamping piece 14 is wider, which improves the clamping stability of the bone nail 100.

[0061] Furthermore, the end of the clamping piece 14 is provided with a nail guard section 141, which extends parallel to the central axis. In this embodiment, multiple nail guard sections 141 form an extension channel 122, which provides guidance for fixation when the bone nail 100 is turned.

[0062] Preferably, the outer wall of the fixation nail body 1 is provided with a first anti-slip structure. The operator can hold the fixation nail body 1 with the area provided by the first anti-slip structure. The first anti-slip structure increases friction, making it easier for the operator to hold the bone nail fixation device and preventing it from falling. Specifically, the first anti-slip structure includes multiple grooves or protrusions; or the first anti-slip structure includes anti-slip patterns.

[0063] Preferably, the support surface 21 is provided with a second anti-slip structure. The second anti-slip structure can increase the friction between the support surface 21 and the periphery of the installation position, thereby improving the stability of the bone screw fixation device when installing the bone screw 100. Specifically, when the bone screw 100 needs to be installed on the scalp and skull, the second anti-slip structure can be a concave-convex structure to prevent damage to the scalp; when the bone screw 100 needs to be installed directly on the skull, the second anti-slip structure can be a pointed structure that can penetrate the outer wall of the skull to prevent the bone screw fixation device from deviating relative to the skull.

[0064] In existing technologies, when a surgeon operates the bone screw 100, their hand inevitably falls within the surgical field of vision, obscuring some critical areas and interfering with the surgeon's observation of the surgical site, thus reducing the precision of the operation. For highly demanding neurosurgical procedures, this may affect the positioning and fixation of the implant, thereby impacting the patient's treatment outcome and recovery process. To address these issues, in this embodiment, the bone screw fixation device is made of a transparent material, allowing the surgeon to observe the precise position of the bone screw 100, facilitating rapid access to the head of the bone screw 100, and enabling quicker alignment of the bone screw 100 with the installation position, thereby increasing operational convenience.

[0065] In this embodiment, the supporting shell 2 and the fixing nail body 1 are integrally formed. This bone nail fixing device can be processed by 3D printing, injection molding, or CNC machining.

[0066] In other embodiments, such as Figure 4 As shown, for ease of manufacturing, the bone screw fixation device is a split structure, with the support shell 2 detachably connected to the screw body 1. The support shell 2 and the screw body 1 can be manufactured separately, reducing manufacturing difficulty. The support shell 2 is connected to the screw body 1 via threaded connection, magnetic connection, or snap-fit ​​connection. In this embodiment, the end of the screw body 1 near the support shell 2 has an external thread, and the end of the support shell 2 away from the support surface 21 has a threaded hole; the support shell 2 is threadedly connected to the screw body 1.

[0067] like Figures 1-4 As shown, this embodiment also provides a method for using the bone screw fixation device, as detailed below:

[0068] During assembly, the bone screw 100 is installed via the guide channel 11. A screwdriver is inserted through the guide channel 11 and pushes the bone screw 100. When the bone screw 100 contacts the upper annular stop protrusion 1211, it expands the clamping hole 121, allowing the head of the bone screw 100 to pass through the upper annular stop protrusion 1211 and enter the gap between the two annular stop protrusions 1211. When the doctor needs to use the bone screw 100 to fix the implant, he only needs to hold the bone screw fixation device, place the bone screw fixation device in the installation position, and then use the screwdriver to reach the head of the bone screw 100 through the guide channel 11. He continues to push the screwdriver so that the bone screw 100 reaches the installation position, and then tightens the screwdriver to fix it.

[0069] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of this application, the scope of which is determined by the scope of the appended claims.

Claims

1. A bone screw fixation device for fixing a bone screw (100), characterized in that, include: The main body (1) of the fixation nail has a guide channel (11) and a clamping section (12) arranged in sequence. The guide channel (11) is used for the tool (200) to pass through, and the clamping section (12) is used to clamp the bone nail (100). The bone nail (100) can be detached from the clamping section (12) by the action of the tool (200). A support shell (2) is provided, one end of which is connected to the fastener body (1), and the other end extends beyond the clamping section (12).

2. The bone screw fixation device according to claim 1, characterized in that, The supporting shell (2) is disposed around a portion of the guide channel (11) and the clamping segment (12), and is coaxial with and spaced apart from the portion of the guide channel (11) and the clamping segment (12).

3. The bone screw fixation device according to claim 1, characterized in that, The other end of the supporting shell (2) is provided with a supporting surface (21), which is used to press against the periphery of the installation position; when the clamping section (12) clamps the bone nail (100), the bone nail (100) is located inside the supporting shell (2), and the nail body of the bone nail (100) does not protrude from the supporting surface (21); when the bone nail (100) is detached from the clamping section (12), at least part of the nail body is threadedly connected to the installation position.

4. The bone screw fixation device according to claim 1, characterized in that, The clamping section (12) includes a clamping hole (121) and an extension channel (122). The guide channel (11), the clamping hole (121) and the extension channel (122) are connected in sequence and coaxially arranged. The clamping hole (121) is used to clamp the head of the bone screw (100), and the extension channel (122) is used to clamp the body of the bone screw (100).

5. The bone screw fixation device according to claim 4, characterized in that, The fastener body (1) is provided with a plurality of circumferentially spaced elastic arms (13) and clamping pieces (14) extending from the ends of the elastic arms (13). The elastic arms (13) extend along the axis of the guide channel (11). The plurality of elastic arms (13) form part of the guide channel (11), and the plurality of clamping pieces (14) form the clamping segment (12).

6. The bone screw fixation device according to claim 5, characterized in that, The inner wall of the clamping plate (14) is provided with two annular stop protrusions (1211) spaced apart. The inner diameter of the two annular stop protrusions (1211) is smaller than the outer diameter of the head of the bone nail (100). A stop groove (1212) is formed between the two annular stop protrusions (1211) and the stop groove (1212) is used to clamp the head of the bone nail (100).

7. The bone screw fixation device according to claim 5, characterized in that, The width of the clamping piece (14) is greater than the width of the elastic arm (13), and the clamping piece (14) extends from the end of the elastic arm (13) toward the central axis, so that the diameter of the clamping hole (121) gradually decreases.

8. The bone screw fixation device according to claim 5, characterized in that, The end of the clamping piece (14) is provided with a nail guard section (141), which extends parallel to the central axis.

9. The bone screw fixation device according to claim 1, characterized in that, The outer wall of the nail body (1) is provided with a first anti-slip structure.

10. The bone screw fixation device according to claim 9, characterized in that, The first anti-slip structure includes multiple grooves or protrusions; or the first anti-slip structure includes anti-slip patterns.

11. The bone screw fixation device according to claim 1, characterized in that, The bone screw fixation device is made of transparent material.

12. The bone screw fixation device according to claim 1, characterized in that, The supporting shell (2) and the fixing body (1) are integrally formed; or The supporting shell (2) is detachably connected to the fixing body (1).

13. The bone screw fixation device according to claim 1, characterized in that, The supporting shell (2) is threaded, magnetically attached or snapped to the fastener body (1).

14. The bone screw fixation device according to claim 3, characterized in that, The support surface (21) is provided with a second anti-slip structure.

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