Anchor, nailing device and bone anchoring device

Abstract

The invention discloses an anchor, a nailing device and a bone anchoring device.The anchor comprises an anchor body, an anti-rotation nut and a pushing bolt, the anchor body is of a sleeve-shaped structure with the two ends open, a barb structure is constructed outside the anchor body, and the anchor body is made of a magnesium alloy material; the anti-rotation nut is arranged at the head of the anchor body, the anchor body and the anti-rotation nut are matched to limit the degree of freedom of relative rotation between the anchor body and the anti-rotation nut, and the anti-rotation nut is made of magnesium alloy materials. The head of the propelling bolt is in threaded connection with the anti-rotation nut; an extrusion body is constructed on the tail portion, the extrusion body is located in the anchor body, the extrusion body can rotate around the axis of the extrusion body in the anchor body and move in the axial direction, the extrusion body is constructed to be capable of extruding the anchor body outwards to enable the anchor body to expand when moving towards the anti-rotation nut, and the propelling bolt is made of magnesium alloy materials. The treatment experience of a patient and the anchoring effect can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an anchor bolt, a nail inserter and a bone anchoring device. Background Art

[0002] Currently, common non-degradable titanium alloy anchor bolts and polyetheretherketone anchor bolts on the market all have the drawback of non-degradability. After the operation is healed, a second operation is required to remove them, or the implants will accompany the patient for life, causing troubles in necessary scenarios of life. Secondly, the fixing effect of the existing anchor bolts is not good, and a new solution is urgently needed to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide an anchor bolt, a nail inserter and a bone anchoring device to solve the problems existing in the above-mentioned prior art and improve the treatment experience of patients and the anchoring effect.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The present invention provides an anchor bolt, comprising:

[0006] An anchor bolt body, the anchor bolt body has a sleeve-like structure with openings at both ends, a barbed structure is constructed on the outer side of the anchor bolt body, and the anchor bolt body is made of magnesium alloy material;

[0007] An anti-rotation nut, the anti-rotation nut is arranged at the head of the anchor bolt body, and the anchor bolt body and the anti-rotation nut cooperate to limit the freedom of relative rotation between the two, and the anti-rotation nut is made of magnesium alloy material;

[0008] A propulsion bolt, the head of the propulsion bolt is threadedly connected to the anti-rotation nut; a pressing body is constructed at the tail, the pressing body is located inside the anchor bolt body, the pressing body can rotate around its own axis and move axially inside the anchor bolt body, and the pressing body is configured to extrude the anchor bolt body outward when moving towards the anti-rotation nut to expand the anchor bolt body, and the propulsion bolt is made of magnesium alloy material.

[0009] Preferably, the anchor bolt body includes a primary anchor bolt and a secondary anchor bolt; both the secondary anchor bolt and the primary anchor bolt are in a sleeve-like structure with openings at both ends. The secondary anchor bolt is disposed within the primary anchor bolt, and the extrusion body is disposed within the secondary anchor bolt. The extrusion body can rotate and move axially within the secondary anchor bolt. The wall of the primary anchor bolt is provided with a plurality of channels extending from the tail to the head, and the channels divide a part of the wall of the primary anchor bolt into a plurality of first expansion strips. The wall of the secondary anchor bolt is provided with a plurality of gaps extending from the tail to the head, and the gaps divide a part of the wall of the secondary anchor bolt into a plurality of second expansion strips. The barb structure is formed on the outside of the first expansion strip, and the barb structure is formed on the outside of some of the second expansion strips to form a second barb expansion strip. The second barb expansion strip is disposed opposite to the channel. In the initial state, there is an annular gap between the inner wall of the primary anchor bolt and the outer wall of the secondary anchor bolt. The anchor bolt is pushed into the bone channel to reach the primary anchoring state. In the primary anchoring state: the barb structure outside the primary anchor bolt contacts or is embedded in the wall surface of the bone channel, and the barb structure outside the secondary anchor bolt is located within the cylindrical surface where the outermost contour of the primary anchor bolt is located. The extrusion body moves towards the anti-rotation nut within the secondary anchor bolt to reach the secondary anchoring state. In the secondary anchoring state: the barb structure on the second expansion strip protrudes beyond the cylindrical surface where the outermost contour of the primary anchor bolt is located and contacts or is embedded in the wall surface of the bone channel.

[0010] Preferably, an elastic medical anti-loosening suture loop is provided between the secondary anchor bolt and the anti-rotation nut.

[0011] Preferably, the tail of the push bolt is provided with a threading hole.

[0012] Preferably, the outer diameter of the anchor bolt body is 1 - 2 mm.

[0013] Preferably, an internal hexagonal structure is formed on one side of the extrusion body.

[0014] The present invention also provides an anchor bolt inserter for fixing the anchor bolt as described above into a bone channel, including: the head of the anchor bolt inserter is formed with a structure matching the push bolt and a structure pressing against the tail of the anchor bolt.

[0015] Preferably, the staple applicator includes an outer tube, an inner staple core, a handle, and a positioning pin; one end of the inner staple core has a structure adapted to cooperate with the pushing bolt, and the other end extends into the outer tube from one end of the outer tube. A positioning hole is formed in the portion of the inner staple core located in the outer tube. The outer tube is provided with a first channel extending along the axial direction and a second channel extending along the circumferential direction. The head of the outer tube is adapted to abut against the tail of the anchor bolt. The second channel communicates with one end of the first channel away from the head of the outer tube. The handle is sleeved outside the outer tube, and a fixing hole is provided on the handle. The positioning pin passes through the positioning hole and its end portion is inserted into the fixing hole after passing out of the first channel or the second channel. When the positioning pin passes through the second channel, the head of the outer tube abuts against the tail of the anchor bolt; when the positioning pin passes through the first channel, there is a gap between the head of the outer tube and the anchor bolt.

[0016] Preferably, a wire passing channel is provided inside the inner staple core; a wire outlet hole is provided at a position where the inner staple core and the outer tube are opposite to each other; the suture on the anchor bolt can pass through the wire passing channel and the wire outlet hole and come out.

[0017] The present invention also provides a bone anchoring device, including the anchor bolt as described above and the staple applicator as described above.

[0018] The present invention has achieved the following technical effects compared with the prior art:

[0019] The present invention uses degradable magnesium alloy to make the anchor bolt. After being implanted into the body, the magnesium alloy can be degraded and absorbed as the bone heals, eliminating the need for a second operation to remove it and avoiding the embarrassing troubles of passing through security checks and entering and leaving shopping malls in daily life.

[0020] The present invention improves the anchoring effect by constructing barbs on the anchor bolt body and setting the anchor bolt body as an expandable structure.

[0021] The anchor bolt of the present invention can achieve double fixation, effectively ensuring the clinical use requirements.

[0022] The size of the anchor bolt of the present invention is 1-2 mm, which can be specifically used for the finger and toe joints of teenagers and infants. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1Schematic diagram of the anchor bolt provided by the embodiment of the present invention;

[0025] Figure 2 It is Figure 1 Schematic diagram of the structure after removing the primary anchor bolt in;

[0026] Figure 3 It is Figure 2 Schematic diagram of the structure after removing the secondary anchor bolt in;

[0027] Figure 4 It is Figure 1 Schematic diagram of the structure of the primary anchor bolt in;

[0028] Figure 5 It is Figure 1 Schematic diagram of the structure of the secondary anchor bolt in;

[0029] Figure 6 It is Figure 1 Cross-sectional view of, that is, cross-sectional view of the anchor bolt in the initial state and the primary anchoring state;

[0030] Figure 7 Cross-sectional view of the anchor bolt in the secondary anchoring state;

[0031] Figure 8 Schematic diagram of the bone anchoring device provided by the embodiment of the present invention;

[0032] Figure 9 It is Figure 8 Schematic diagram of the structure after removing half of the handle in;

[0033] Figure 10 It is Figure 9 Local enlarged view at A in;

[0034] Figure 11 It is Figure 8 Schematic diagram of the structure of the upper nail inner core, suture and anchor bolt in;

[0035] Figure 12 It is Figure 11 Local enlarged view at B in;

[0036] In the figure: 1 - anchor bolt body; 2 - anti-rotation nut; 3 - propulsion bolt; 4 - medical anti-loosening suture loop; 5 - outer tube; 6 - handle; 7 - suture; 9 - inner core for nail insertion; 11 - secondary anchor bolt; 12 - primary anchor bolt; 121 - channel; 122 - first expansion strip; 123 - barbed structure; 111 - gap; 112 - second expansion strip; 113 - second barbed expansion strip; 31 - extrusion body; 32 - internal hexagonal structure; 33 - schematic line of the outermost edge of the barbed structure on the secondary anchor bolt; 34 - schematic line of the outermost edge of the barbed structure on the primary anchor bolt; 100 - anchor bolt; 51 - positioning pin; 52 - second channel; 53 - first channel; 91 - positioning hole; 92 - wire outlet hole; 93 - external hexagonal structure. Detailed implementation manners

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0039] In this specification, the tail and the head are relative to when the anchor bolt is inserted into the human body. The head is the end far from the medical staff, and the tail is the end close to the medical staff. The head can also be called the distal end, and the tail can be called the proximal end. The far and near are only defined relative to the medical staff.

[0040] The following combines Figures 1 to 12 , and describes the embodiments of the present invention.

[0041] As Figures 1 to 7 shown, the present invention provides an anchor bolt 100, including: an anchor bolt body 1, an anti-rotation nut 2, and a propulsion bolt 3.

[0042] The anchor body 1 has a sleeve-like structure with openings at both ends. The outer part of the anchor body 1 is constructed with barbed structures 123. The anchor body 1 is made of magnesium alloy material. The anti-rotation nut 2 is arranged at the head of the anchor body 1. The anchor body 1 and the anti-rotation nut 2 cooperate to limit the freedom of relative rotation between the two. For example, the tail of the anti-rotation nut 2 can be set into a non-rotating body shape, such as a plum blossom shape, and then the head of the anchor body 1 is set into a cavity that matches the shape of the tail of the anti-rotation nut 2. The tail of the anti-rotation nut 2 can extend into the head of the anchor body 1. The anti-rotation nut 2 is made of magnesium alloy material. The head of the push bolt 3 is threadedly connected to the anti-rotation nut 2. The tail is constructed with an extrusion body 31. The extrusion body 31 is located inside the anchor body 1. The extrusion body 31 can rotate around its own axis and move axially inside the anchor body 1. The extrusion body 31 is configured to extrude the anchor body 1 outward when moving toward the anti-rotation nut 2, causing the anchor body 1 to expand. The push bolt 3 is made of magnesium alloy material.

[0043] During use, place the anchor 100 into the bone channel, and then gently tap the anchor 100 into the bone channel so that the tail end of the anchor 100 is buried in the bone surface. Then, rotate the push bolt 3 to make the push bolt 3 move inward along the axis. When the push bolt 3 moves inward, the extrusion body 31 can extrude the anchor body 1 outward, causing the anchor body 1 to expand, and further enabling the barbed structures 123 to be further embedded into the bone to improve the anchoring effect. In addition, the anchor body 1, the anti-rotation nut 2, and the push bolt 3 are all made of magnesium alloy material. After being implanted into the body, the magnesium alloy can be degraded and absorbed as the bone heals, eliminating the need for a second operation to remove it and avoiding the embarrassing troubles of passing through security checks and entering and leaving shopping malls in daily life.

[0044] In some embodiments,

[0045] The anchor body 1 includes a primary anchor 12 and a secondary anchor 11; both the secondary anchor 11 and the primary anchor 12 are sleeve-like structures with openings at both ends. The secondary anchor 11 is disposed within the primary anchor 12, and the extrusion body 31 is disposed within the secondary anchor 11. The extrusion body 31 can rotate and move axially within the secondary anchor 11. The wall of the primary anchor 12 is provided with a plurality of channels 121 extending from the tail to the head. The channels 121 divide a part of the wall of the primary anchor 12 into a plurality of first expansion strips 122. The wall of the secondary anchor 11 is provided with a plurality of gaps 111 extending from the tail to the head. The gaps 111 divide a part of the wall of the secondary anchor 11 into a plurality of second expansion strips 112. A barbed structure 123 is formed on the outside of the first expansion strip 122, and a barbed structure 123 is formed on the outside of some of the second expansion strips 112 to form a second barbed expansion strip 113. The second barbed expansion strip 113 is disposed opposite to the channel 121. In the initial state, there is an annular gap between the inner wall of the primary anchor 12 and the outer wall of the secondary anchor 11. The anchor is pushed into the bone channel and reaches the primary anchoring state. In the primary anchoring state: the barbed structure outside the primary anchor 12 contacts or is embedded in the wall surface of the bone channel, and the barbed structure outside the secondary anchor 11 is located within the cylindrical surface where the outermost contour of the primary anchor is located. The extrusion body 31 moves towards the anti-rotation nut 2 within the secondary anchor 11 to reach the secondary anchoring state. In the secondary anchoring state: the barbed structure on the second expansion strip 112 protrudes beyond the cylindrical surface where the outermost contour of the primary anchor 12 is located and contacts or is embedded in the wall surface of the bone channel.

[0046] This embodiment can achieve the secondary anchoring of the anchor 100, further improving the anchoring effect. During specific use, the doctor can control the degree of anchoring according to needs.

[0047] Specifically, the extrusion body 31 is a conical surface, and the inner wall of the secondary anchor 11 is a conical surface that cooperates with the extrusion body 31. In the initial state, the outer conical surface of the extrusion body 31 contacts the inner conical surface of the extrusion body 31. During use, first perform primary anchoring on the anchor, and then rotate the extrusion body 31 to move it inward. When moving, first expand the secondary anchor 11. Since there is a gap between the primary anchor 12 and the secondary anchor 11, this gap can ensure that the primary anchor 12 does not expand when the secondary anchor 11 expands in the early stage, and the designed gap value can ensure that as the secondary anchor 11 expands, the barbs on it can protrude outside the primary anchor for secondary anchoring.

[0048] In some embodiments, as Figure 6 shown, in the initial state, that is, in the primary anchoring state, the outermost edge of the barbed structure on the secondary anchor 11 is preferably on the cylindrical surface where the outermost contour of the primary anchor 12 is located, which can ensure that the barbed structure on the secondary anchor 11 can protrude outside the primary anchor 12.

[0049] In some embodiments, an elastic medical anti-loosening suture loop 4 is disposed between the secondary anchor 11 and the anti-rotation nut 2.

[0050] The medical anti-loosening suture loop 4 in this embodiment is equivalent to an anti-loosening gasket. After being squeezed by the secondary anchor 11, it will give a reaction force to the secondary anchor 11, and the secondary anchor 11 transmits this reaction force to the driving bolt 3. The driving bolt 3 will receive a force in the direction away from the anti-rotation nut 2, thereby improving the connection strength between the anti-rotation nut 2 and the driving bolt 3.

[0051] In some embodiments, a threading hole is provided at the tail of the driving bolt 3.

[0052] This embodiment realizes the setting of the suture 7.

[0053] In some embodiments, the outer diameter of the anchor body 1 is 1-2 mm.

[0054] The size of the anchor 100 in this embodiment is 1-2 mm, and it can be specifically used for the finger and toe joints of teenagers and infants.

[0055] In some embodiments, an internal hexagonal structure 32 is configured on one side of the extrusion body 31.

[0056] This embodiment is applicable to an external hexagonal screwdriver, that is, the upper nail inner core 9 in the following embodiment is used as an external hexagonal screwdriver.

[0057] As Figures 8 to 12 shown, the present invention also provides a nail inserter for fixing the anchor 100 in the above embodiments in a bone channel, including: the head of the nail inserter is configured with a structure that cooperates with the driving bolt 3 and a structure that abuts against the tail of the anchor 100.

[0058] In some embodiments, the nail inserter includes an outer tube 5, an upper nail inner core 9, a handle 6, and a positioning pin 51; one end of the upper nail inner core 9 is a structure that cooperates with the driving bolt 3, and the other end extends into the outer tube 5 from one end of the outer tube 5. A positioning hole 91 is provided in the part of the upper nail inner core 9 located in the outer tube 5. A first channel 53 extending along the axial direction is provided on the outer tube 5, and a second channel 52 extending along the circumferential direction is provided on the outer tube 5. The head of the outer tube 5 is used to abut against the tail of the anchor 100. The end of the second channel 52 away from the head of the outer tube 5 communicates with the first channel 53. The handle 6 is sleeved outside the outer tube 5, and a fixing hole is provided on the handle 6. The positioning pin 51 passes through the positioning hole 91 and the end portion thereof passes through the first channel 53 or the second channel 52 and then is inserted into the fixing hole. When the positioning pin 51 passes through the second channel 52, the head of the outer tube 5 abuts against the tail of the anchor 100; when the positioning pin 51 passes through the first channel 53, there is a gap between the head of the outer tube 5 and the anchor 100.

[0059] When in use, in the initial state, the positioning needle 51 is inserted into the second channel 52, and the handle 6 is held to insert the head of the nail core 9 into the hexagonal hole at the tail of the extrusion body 31. After being inserted to a certain depth, the head of the outer tube 5 is against the tail of the anchor body 1, and the purpose of knocking the anchor 100 into the bone channel is achieved by knocking the nailer. After the anchor 100 is in place, hold the handle 6 with one hand and rotate the outer tube 5 with the other hand until the positioning needle 51 is aligned with the first channel 53. At this time, the outer tube 5 can be pulled back, and the head of the outer tube 5 will be away from the tail of the anchor 100. At this time, the handle 6 can be rotated to drive the nail core 9 and the push bolt 3 to move forward, thereby realizing the expansion of the anchor body 1.

[0060] This embodiment enables the anchoring of the anchor 100 with a micro diameter.

[0061] In some embodiments, a wire passage is provided in the upper nail inner core 9 ; a wire outlet hole 92 is provided at the relative position between the upper nail inner core 9 and the outer tube 5 ; and the suture 7 on the anchor 100 can pass through the wire passage and the wire outlet hole 92 .

[0062] The suture 7 in this embodiment can be used to connect the anchor 100 to the nail core 9, thereby improving the reliability of the connection between the anchor 100 and the nailing device. Specifically, the suture 7 is fixed relative to the outer tube 5 by a thread fixer at the front end of the handle 6.

[0063] One end of the upper nail inner core 9 is configured with an outer hexagonal structure 93 matching the inner hexagonal structure 32 on the extruded body 31 .

[0064] The present invention further provides a bone anchoring device, comprising the anchor 100 in the above embodiment and the nailing device in the above embodiment.

[0065] The procedure of performing surgery using the above-mentioned bone anchoring device is as follows:

[0066] Pre-set a bone channel (about 0.2 mm smaller in diameter than the anchor 100, which enables the barbed structure outside the primary anchor 12 to be pressed against the wall of the bone channel after the anchor 100 is tapped into the bone channel later) - gently tap the anchor 100 along the bone channel into the bone channel so that the tail end of the anchor 100 is buried in the bone surface, thereby achieving the fixation of the primary anchor 12 (the barbed structure 123 is embedded in the bone) - rotate the plum blossom rotatable handle at the tail of the outer tube 5 counterclockwise to retract the outer tube 5 - hold the handle 6 with the right hand and rotate it clockwise - as the handle 6 is rotated, the positioning pin 51 drives the inner nail core 9 to act together - the inner nail core 9 and the propulsion bolt 3 are connected by the internal hexagonal structure 32 and rotate clockwise together - due to the action of the bolt at the front end of the propulsion bolt 3 and the anti-rotation nut 2 at the head of the anchor 100, the propulsion bolt 3 moves along the axis towards the head of the anchor 100 - as the propulsion bolt 3 moves towards the head of the anchor 100, the compression medical anti-loosening suture loop 4 is compressed, and its reaction force will achieve the effective fixation of the propulsion bolt 3, the anti-rotation nut 2 and the primary anchor 12 (similar to the function of a lock washer) - as the propulsion bolt 3 moves forward, due to the conical structure design, the conical part of the propulsion bolt 3 will outwardly support the secondary anchor 11 from the inside, realizing the expansion of the secondary anchor 11, and the inverted cone structure in the secondary anchor 11 structure will further outwardly support in the bone channel, achieving the secondary fixation of the anchor 100 in the bone channel.

[0067] In the present invention, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An anchor, characterized in that: include: An anchor body, the anchor body is a sleeve-shaped structure with two ends open, a barb structure is constructed outside the anchor body, and the anchor body is made of magnesium alloy; An anti-rotation nut, which is arranged on the head of the anchor body, and the anchor body and the anti-rotation nut cooperate to limit the freedom of relative rotation between the two, and the anti-rotation nut is made of magnesium alloy; A push bolt, wherein the head of the push bolt is threadedly connected to the anti-rotation nut; the tail portion is configured with an extrusion body, the extrusion body is located in the anchor body, the extrusion body can rotate around its own axis and move axially in the anchor body, the extrusion body is configured to be able to squeeze the anchor body outward to expand the anchor body when moving toward the anti-rotation nut, and the push bolt is made of magnesium alloy material.

2. The anchor according to claim 1, characterized in that: The anchor body comprises a primary anchor and a secondary anchor; the secondary anchor and the primary anchor are both sleeve-shaped structures with openings at both ends; the secondary anchor is arranged in the primary anchor; the extrusion body is arranged in the secondary anchor; the extrusion body can rotate in the secondary anchor and move axially; the wall of the primary anchor is provided with a plurality of channels extending from the tail to the head; the channels divide part of the wall of the primary anchor into a plurality of first expansion strips; the wall of the secondary anchor is provided with a plurality of gaps extending from the tail to the head; the gaps divide part of the wall of the secondary anchor into a plurality of second expansion strips; the first expansion strip is externally structured with the barb structure; and part of the second expansion strip is externally structured with the barb structure. A second barbed expansion strip is formed, and the second barbed expansion strip is arranged opposite to the channel; in the initial state, there is an annular gap between the inner wall of the first-level anchor and the outer wall of the second-level anchor, and the anchor is pushed into the bone channel and reaches a first-level anchoring state. In the first-level anchoring state: the barb structure outside the first-level anchor contacts with or is embedded in the wall of the bone channel, and the barb structure outside the second-level anchor is located in the cylindrical surface where the outermost contour of the first-level anchor is located; the extrusion body moves toward the anti-rotation nut in the second-level anchor to reach a second-level anchoring state. In the second-level anchoring state: the barb structure on the second expansion strip protrudes from the cylindrical surface where the outermost contour of the first-level anchor is located and contacts with or is embedded in the wall of the bone channel.

3. The anchor according to claim 2, characterized in that: An elastic medical anti-loosening suture ring is arranged between the secondary anchor and the anti-rotation nut.

4. The anchor according to claim 1, characterized in that: The rear portion of the push bolt is provided with a threading hole.

5. The anchor according to claim 1, characterized in that: The outer diameter of the anchor body is 1 to 2 mm.

6. The anchor according to claim 1, characterized in that: The tail of the extruded body is configured with an inner hexagonal structure.

7. A nailing device, characterized in that: Used to fix the anchor described in any one of claims 1 to 6 in a bone channel, comprising: the head of the nailing device is configured with a structure that matches the driving bolt and a structure that presses against the tail of the anchor.

8. The nailing device according to claim 7, characterized in that: The nailing device comprises an outer tube, a nailing inner core, a handle and a positioning pin; one end of the nailing inner core is a structure matched with the pushing bolt, and the other end extends into the outer tube from one end of the outer tube, and a positioning hole is opened in the part of the nailing inner core located in the outer tube, the outer tube is provided with a first channel extending along the axial direction, and the outer tube is provided with a second channel extending along the circumferential direction, the head of the outer tube is used to abut against the tail of the anchor nail, and the second channel is connected with an end of the first channel away from the head of the outer tube, the handle is sleeved outside the outer tube, and a fixing hole is provided on the handle, the positioning pin is penetrated into the positioning hole and the end portion is inserted into the fixing hole after passing through the first channel or the second channel, and when the positioning pin is penetrated into the second channel, the head of the outer tube abuts against the tail of the anchor nail; when the positioning pin is penetrated into the first channel, there is a gap between the head of the outer tube and the anchor nail.

9. The nailing device according to claim 8, characterized in that: A wire passing channel is provided in the inner core of the upper nail; a wire outlet hole is provided at a position where the inner core of the upper nail and the outer tube are opposite to each other; and the suture on the anchor nail can pass through the wire passing channel and the wire outlet hole.

10. A bone anchoring device, characterized in that: It comprises the anchor nail according to any one of claims 1 to 6 and the nailing device according to any one of claims 7 to 9.

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