External fixation device with micro-motion assembly and hydroxyapatite coating fixation nail

Abstract

The invention relates to the field of medical instruments, in particular to an external fixing device with a micro-motion assembly and a hydroxyapatite coating fixing nail, which comprises a bracket, three clamping block assemblies and the micro-motion assembly, the three clamping block assemblies are used for clamping at least one hydroxyapatite coating fixing nail respectively, the micro-motion assembly is configured to output kinetic energy to the second assembly when receiving electric energy, and when the second assembly is in a movable state relative to the support, the micro-motion assembly is used for driving the second assembly to move according to a preset path. The preset path is a swing path and / or a linear path. The broken bone is actively driven through the micro-motion assembly, the second assembly and the hydroxyapatite coating fixing nail clamped on the second assembly, so that the broken bone driven by the second assembly and the hydroxyapatite coating fixing nail clamped on the second assembly can generate fine displacement, and the broken end of the driven broken bone can form stress stimulation, so that the broken bone can be driven to move stably and stably. The fracture healing time is shortened, and the fracture healing treatment efficiency is high.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, in particular to an external fixation device with a micro-motion component and a hydroxyapatite coating fixing nail. Background Art

[0002] A fracture is a condition that refers to a complete or partial break in the continuity of a bone structure. Generally speaking, a whole bone will be broken into at least two broken bones after a fracture. The broken ends of each broken bone are called fracture ends (hereinafter referred to as fracture ends).

[0003] Among the medical treatments for fractures, using an external fixator to treat fractures is one of the commonly used medical treatments; an external fixator, for example, is provided in the prior art, and is named a minimally invasive fracture reduction and fixation system, and the patent document with application number 202311313041.1. The main function of the external fixator is to reduce and fix at least two broken bones. After the patient uses the external fixator to fix the broken bones, the two adjacent broken bones remain in a relatively fixed state.

[0004] Experimental phenomena have shown that slight movement of the broken ends can promote the healing of fractures. This is manifested by increasing stress stimulation on the broken ends, prolonging the inflammatory period, and increasing blood flow to the limbs, thereby promoting vigorous proliferation of cells and capillaries, producing abundant periosteal callus, and filling the space between the two adjacent broken ends with cartilage tissue, which then solidifies, and can significantly promote callus growth and fracture healing. From a medical perspective, during the fracture recovery process, limb movement should be allowed so that the broken bones receive external forces during the movement, resulting in slight displacement of the two adjacent broken bones, and then slight movement of the broken bone ends, forming stress stimulation of the broken ends.

[0005] However, if a minimally invasive fracture reduction and fixation system of the prior art is used for fracture recovery, since the patient's fractured bones have been fixed by the minimally invasive fracture reduction and fixation system, during the patient's limb exercise, there is no or little micro displacement between the two adjacent fractured bones, thereby hindering the micro movement of the fracture ends and failing to form stress stimulation of the fracture ends, resulting in prolonged fracture healing time and low fracture healing treatment efficiency;

[0006] The above-mentioned phenomenon of low efficiency in fracture healing treatment occurs because, after the external fixator of the prior art fixes the broken bones, the broken bones remain stationary relative to the external fixator, resulting in no slight displacement between two adjacent broken bones. In other words, the external fixator of the prior art cannot drive the broken bones to produce slight displacement. Therefore, how to enable the external fixator to drive the broken bones to produce slight displacement becomes a technical problem to be solved. Summary of the invention

[0007] In order to solve the technical problem of how to realize that an external fixator can drive a broken bone to produce a slight displacement, the present invention provides an external fixation device having a micro-motion component and a hydroxyapatite-coated fixation nail.

[0008] To achieve the above object, the technical solution adopted by the present invention is:

[0009] According to one aspect of the present invention, there is provided an external fixation device having a micro-motion component and a hydroxyapatite-coated fixing nail, comprising a bracket, three clamping block assemblies and the micro-motion component; the bracket is provided with a slide groove, and the slide groove is configured as a first section and a second section, wherein the two ends of the bracket in the length direction are respectively a head end and a tail end, the first section extends along the direction from the head end to the tail end, and the second section extends along the direction from the tail end to the head end, and the first section and the second section are separated by the mounting part of the bracket; the three clamping block assemblies are respectively used to clamp at least one of the hydroxyapatite-coated fixing nails, the three clamping block assemblies are respectively provided with a first slider portion, and the micro-motion assembly is provided with a second slider portion, and any one of the first slider portion and the second slider portion respectively forms a part with the slide groove Sliding pair; the three clamping block assemblies are respectively defined as a first assembly, a second assembly and a third assembly, wherein, along the direction from the head end to the end end, the first assembly, the second assembly and the micro-motion assembly are sequentially arranged in the first section, a gap is formed between the first assembly and the second assembly, the micro-motion assembly is connected to the second assembly, and the third assembly is arranged in the second section; the three clamping block assemblies and the micro-motion assembly respectively have a fixed state and a movable state relative to the bracket, wherein the micro-motion assembly is configured to output kinetic energy to the second assembly upon receiving electric energy, and when the second assembly is in a movable state relative to the bracket, the micro-motion assembly is used to drive the second assembly to move along a preset path, and the preset path is a swinging path and / or a straight path.

[0010] Furthermore, the micro-motion component includes a shell, a motor and a connecting rod mechanism; the shell is provided with a accommodating cavity, and the accommodating cavity and the shell form a mounting opening for setting the motor; the motor is arranged in the accommodating cavity, wherein the motor shaft of the motor is configured as an eccentric shaft, and the motor shaft of the motor points to the mounting opening; the two ends of the connecting rod mechanism are respectively a head end and a tail end, the head end is arranged in the accommodating cavity, the head end is connected to the motor shaft of the motor, the tail end is arranged outside the accommodating cavity, and the tail end is connected to the second component through a first positioning pin.

[0011] Furthermore, a limiting groove is provided on the shell, the limiting groove passes through one of the side walls of the shell, and the limiting groove is communicated with the accommodating cavity; a part of the connecting rod mechanism is limited in the limiting groove, and a clearance fit is formed between the connecting rod mechanism and the inner wall of the limiting groove.

[0012] Furthermore, it also includes an adjustment component; the position of the adjustment component is located at the position of the mounting portion, and the adjustment component is connected to the micro-motion component, wherein the adjustment component is configured to output a pulling force or a pushing force to the micro-motion component when receiving kinetic energy, and the micro-motion component performs a stepping linear displacement motion relative to the bracket under the action of the pulling force or the pushing force.

[0013] Furthermore, the adjustment assembly includes a screw and an adjustment knob; the mounting portion is provided with an active channel for being penetrated by the screw and an installation cavity for accommodating the adjustment knob, and the active channel is communicated with the installation cavity and the slide groove respectively; the external thread of the screw and the internal threaded hole of the adjusting knob are connected, wherein the connection between the screw and the adjusting knob is located at the communication point between the installation cavity and the slide groove; the second sliding block portion is provided with a positioning groove for being inserted by the screw and a positioning through hole for being inserted by a second positioning pin, the positioning through hole and the positioning groove are communicated, one end of the screw is provided with a mounting through hole, the mounting through hole is arranged in the positioning groove, and the second positioning pin is respectively inserted into the positioning through hole and the mounting through hole.

[0014] Furthermore, the ratio of the linear movement distance of the screw and the rotation angle of the adjusting knob is configured as 1 mm: 360°; four adjusting hole grooves are recessed on the circumferential surface of the adjusting knob, and the four adjusting hole grooves are distributed at equal intervals along the circumferential direction of the circumferential surface, and any one of the adjusting hole grooves is used to be inserted by a rod-shaped component.

[0015] Furthermore, the screw rod is processed with a positioning surface, and the extension direction of the positioning surface is parallel to the extension direction of the screw rod; the adjustment assembly also includes a tightening screw, and the bracket is provided with a threaded through hole for installing the tightening screw, and the threaded through hole is connected to the movable channel, wherein the position where the tightening screw contacts the positioning surface is located at the connection between the threaded through hole and the movable channel.

[0016] Further, the slide groove passes through the bracket, and the cross-section of the first section and the cross-section of the second section are respectively constructed with a first contour portion and a second contour portion, wherein the penetration direction of the slide groove and the cross-section are respectively perpendicular to the direction from the head end to the tail end, and the slide groove forms a first mouth portion and a second mouth portion with the surface of the bracket, respectively, and the opening direction of the first mouth portion and the opening direction of the second mouth portion diverge from each other; along the direction from the first mouth portion to the second mouth portion, the first contour portion is configured as a divergent contour with a gradually increasing width, and the second contour portion is configured as a parallel contour with equal width or a convergent contour with a gradually decreasing width, wherein at the intersection of the first contour portion and the second contour portion, the width of the first contour portion is greater than the width of the second contour portion; the contour of the cross-section of any one of the first slider portions is respectively the same as the contour of the first contour portion; a part of the contour of the cross-section of the second slider portion is the same as the contour of the first contour portion; the remaining contour of the cross-section of the second slider portion is the same as the contour of the second contour portion, or the remaining contour of the cross-section of the second slider portion is smaller than the contour of the second contour portion.

[0017] Further, any of the clamping block assemblies is respectively provided with a first clamping block, a second clamping block, a connecting screw and a fixing screw; the first clamping block is provided with a first half-groove, the second clamping block is provided with a second half-groove, the number of the first half-groove is the same as the number of the second half-groove, the position of any of the first half-groove matches the position of one of the second half-groove, and any of the hydroxyapatite coated fixing nails is clamped by one of the first half-groove and one of the second half-groove respectively; the length of the first clamping block is greater than the length of the second clamping block, one end of the length direction of the first clamping block is provided with a protrusion for connecting the micro-motion assembly, the second clamping block covers the first clamping block, the second clamping block is located on the side of the protrusion, and the first clamping block and the second clamping block are connected by the connecting screw; the first sliding block portion of any of the clamping block assemblies is provided on the first clamping block, the second clamping block and the first sliding block portion are isolated by the first clamping block, when the first sliding block portion is provided in the sliding groove, the fixing screw is connected to the first sliding block portion through the second mouth portion, and the nail head of the fixing screw is blocked by the bracket outside the second mouth portion.

[0018] Furthermore, it also includes an end cover, which is arranged at the head end of the bracket and is detachably connected to the head end.

[0019] The above technical solution has the following advantages or beneficial effects:

[0020] The external fixation device with a micro-motion component and a hydroxyapatite-coated fixing nail provided by the present invention adopts a micro-motion component arranged on a bracket. The micro-motion component outputs kinetic energy to the second component when receiving electric energy, so that the broken bone can be actively driven through the micro-motion component, the second component and the hydroxyapatite-coated fixing nail clamped on the second component, resulting in the broken bone driven by the second component and the hydroxyapatite-coated fixing nail clamped thereon to produce a slight displacement, and the broken ends of the driven broken bones can form stress stimulation, so that the inflammation period is relatively long, and the cartilage tissue between two adjacent broken ends is relatively more, which can significantly promote callus growth and fracture healing, shorten the fracture healing time, and have high efficiency in fracture healing treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of an external fixation device having a micro-motion component and a hydroxyapatite-coated fixation nail provided in Example 1 of the present invention;

[0022] Figure 2 A schematic structural diagram of an external fixation device having a micro-motion component and a hydroxyapatite-coated fixation nail provided in Example 1 of the present invention;

[0023] Figure 3 A schematic diagram of the structure of a micro-motion assembly provided in Example 1 of the present invention;

[0024] Figure 4 A schematic structural diagram of an external fixation device having a micro-motion component and a hydroxyapatite-coated fixation nail provided in Example 1 of the present invention;

[0025] Figure 5 A schematic structural diagram of an external fixation device having a micro-motion component and a hydroxyapatite-coated fixation nail provided in Example 1 of the present invention;

[0026] Figure 6 A schematic diagram of the structure of a micro-motion assembly provided in Example 1 of the present invention;

[0027] Figure 7 A schematic diagram of the structure of the adjustment component provided in Example 1 of the present invention;

[0028] Figure 8 A schematic diagram of the structure of a clamping block assembly provided in Example 1 of the present invention;

[0029] Fig. 9 A schematic diagram of the structure of a clamping block assembly provided in Example 1 of the present invention;

[0030] Fig.10 A cross-sectional view of the bracket along the direction from the head end to the tail end provided in Example 1 of the present invention;

[0031] Fig.11A cross-sectional view of the bracket along the direction from the end to the head end provided in Example 1 of the present invention;

[0032] Fig.12 A schematic diagram of coordinates of path 1 provided in Example 1 of the present invention;

[0033] Fig.13 A coordinate diagram of path 2 provided in Example 1 of the present invention;

[0034] Fig.14 A coordinate diagram of path three provided in Example 1 of the present invention;

[0035] Fig.15 A schematic diagram of the structure of a hydroxyapatite-coated fixing nail provided in Example 1 of the present invention;

[0036] Fig.16 This is an electrical connection diagram of the micro-motion assembly provided in Example 1 of the present invention. DETAILED DESCRIPTION

[0037] Embodiment 1:

[0038] In this embodiment, an external fixation device having a micro-motion component and a hydroxyapatite-coated fixation nail is provided to solve the technical problem of how to achieve that the external fixation bracket can drive the broken bone to produce a slight displacement.

[0039] For details, see Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 8 , in this embodiment, the external fixation device having a micro-motion component 3 and a hydroxyapatite-coated fixing nail 4 includes a bracket 1, three clamping block components 2 and a micro-motion component 3;

[0040] The bracket 1 is provided with a slide groove 100, which is configured as a first section 101 and a second section 102, wherein the two ends of the bracket 1 in the length direction are a head end D1 and a tail end D2, respectively, the first section 101 extends from the head end D1 to the tail end D2, and the second section 102 extends from the tail end D2 to the head end D1, and the first section 101 and the second section 102 are separated by a mounting portion 103 of the bracket 1;

[0041] The three clamping block assemblies 2 are respectively used to clamp at least one hydroxyapatite coating fixing nail 4. The three clamping block assemblies 2 are respectively provided with a first slider portion 200, and the micro-motion assembly 3 is provided with a second slider portion 300. Any one of the first slider portion 200 and the second slider portion 300 respectively forms a sliding pair with the slide groove 100;

[0042] The three clamping block components 2 are respectively defined as a first component 21, a second component 22 and a third component 23, wherein the first component 21, the second component 22 and the micro-motion component 3 are sequentially arranged in the first section 101 along the direction from the head end D1 to the end end D2, a gap is formed between the first component 21 and the second component 22, the micro-motion component 3 is connected to the second component 22, and the third component 23 is arranged in the second section 102;

[0043] The three clamping block assemblies 2 and the micro-motion assembly 3 respectively have a fixed state and a movable state relative to the bracket 1, wherein the micro-motion assembly 3 is configured to output kinetic energy to the second assembly 22 upon receiving electric energy, and when the second assembly 22 is in a movable state relative to the bracket 1, the micro-motion assembly 3 is used to drive the second assembly 22 to move along a preset path, which is a swinging path and / or a straight path.

[0044] For the convenience of understanding by those skilled in the art, see Figure 2 Taking a fracture case of a long bone with three broken bones as an example, the external fixation device with a micro-motion component 3 and a hydroxyapatite-coated fixing nail 4 of this embodiment is described in detail.

[0045] Figure 2 In the embodiment, the bracket 1 is configured as a strip or long plate as a whole, and the bracket 1 has a thickness that can be used to set the slide groove 100, and the length of the bracket 1 matches the length of the long bone, at least the length of the bracket 1 can meet the requirement that all the broken bones are connected to the bracket 1 through the hydroxyapatite coated fixing nails 4 respectively;

[0046] The bracket 1 should have a certain hardness to reduce deformation of the bracket 1 itself. This is common knowledge known to those skilled in the art and will not be elaborated here.

[0047] See also Figure 1 or Figure 2 The bracket 1 is provided with a slide groove 100. One of the purposes of providing the slide groove 100 is to reduce the weight of the bracket 1 itself; the second purpose of providing the slide groove 100 is to increase the contact area of ​​the bracket 1 relative to the three clamping block assemblies 2 and the contact area of ​​the bracket 1 relative to the micro-motion assembly 3, so as to facilitate the positioning of the three clamping block assemblies 2 and the micro-motion assembly 3 relative to the bracket 1 and fix them more firmly; the third purpose of providing the slide groove 100 is to facilitate the adjustment of the positions of the three clamping block assemblies 2 and the micro-motion assembly 3 relative to the bracket 1;

[0048] See also Figure 1 or Figure 2, the slide groove 100 on the bracket 1 is configured with two sections, namely the first section 101 and the second section 102. The mounting portion 103 arranged between the first section 101 and the second section 102 isolates the first section 101 and the second section 102, so that the clamping block assembly 2 or the micro-motion assembly 3 arranged in the first section 101 cannot move to the second section 102, and the clamping block assembly 2 or the micro-motion assembly 3 (in other embodiments, two micro-motion assemblies 3 may be arranged on one bracket 1, and one of the micro-motion assemblies 3 is arranged in the second section 102) arranged in the second section 102 cannot move to the first section 101;

[0049] In this embodiment, see Figure 1 The mounting portion 103 is positioned between the first section 101 and the second section 102. The specific function of the mounting portion 103 will be described in the following content and will not be mentioned here for the time being. In other embodiments, the mounting portion 103 may be positioned at other positions of the bracket 1, such as outside the first section 101 and the second section 102. However, the position where the mounting portion 103 is positioned in other embodiments will inevitably increase the space occupied by the bracket 1 in other embodiments. Therefore, in this embodiment, the mounting portion 103 is positioned between the first section 101 and the second section 102, one of the purposes of which is to reduce the space occupied by the bracket 1.

[0050] The three clamping block assemblies 2 are respectively arranged on the bracket 1, and any clamping block assembly 2 has a fixed state and a movable state relative to the bracket 1; wherein, when any clamping block assembly 2 is in a fixed state relative to the bracket 1, the clamping block assembly 2 cannot be displaced relative to the bracket 1; conversely, when any clamping block assembly 2 is in a movable state relative to the bracket 1, the clamping block assembly 2 can be displaced relative to the bracket 1 when subjected to an external force;

[0051] See also Figure 1 or Figure 2 The main function of the three clamping block assemblies 2 is to clamp the hydroxyapatite coated fixing nail 4; the hydroxyapatite coated fixing nail 4 is used to connect to one of the broken bones, so that the broken bone can be fixed relative to the bracket 1 through the hydroxyapatite coated fixing nail 4 and the clamping block assembly 2; however, in this embodiment, when the external fixation device with the micro-motion assembly 3 and the hydroxyapatite coated fixing nail 4 is used clinically, one of the clamping block assemblies 2 (i.e., the second assembly 22) needs to be adjusted to form a movable state relative to the bracket 1, as described later;

[0052] See also Figure 1 or Figure 8The three clamping block assemblies 2 are respectively provided with a first sliding block portion 200, which matches the slide groove 100. The first sliding block portion 200 is inserted into the slide groove 100, and in the direction perpendicular to the head end D1 to the end D2, the first sliding block portion 200 and the slide groove 100 form an inseparable connection structure; correspondingly, in the direction along the head end D1 to the end D2, the first sliding block portion 200 can slide in the slide groove 100; when the first sliding block portion 200 slides relative to the slide groove 100, the clamping block assembly 2 with the first sliding block portion 200 slides relative to the bracket 1.

[0053] In this embodiment, see Figure 2 The three clamping block components 2 are respectively defined as a first component 21, a second component 22 and a third component 23, the second component 22 is arranged between the first component 21 and the third component 23, and the second component 22 is connected to the micro-motion component 3;

[0054] See also Figure 1 or Figure 2 , the micro-motion component 3 is arranged on the bracket 1, and the micro-motion component 3 has a fixed state and a movable state relative to the bracket 1; wherein, when the micro-motion component 3 is in a fixed state relative to the bracket 1, the micro-motion component 3 cannot generate displacement relative to the bracket 1, and conversely, when the micro-motion component 3 is in a movable state, the micro-motion component 3 is subjected to an external force and generates displacement relative to the bracket 1;

[0055] See also Figure 1 or Figure 5 The micro-motion component 3 is provided with a second slider portion 300, which matches the slide groove 100. The second slider portion 300 is inserted into the slide groove 100, and in a direction perpendicular to the head end D1 to the end D2, the second slider portion 300 and the slide groove 100 form an inseparable connection structure; correspondingly, in the direction along the head end D1 to the end D2, the second slider portion 300 can slide in the slide groove 100; when the second slider portion 300 slides relative to the slide groove 100, the micro-motion component 3 with the second slider portion 300 slides relative to the bracket 1.

[0056] In this embodiment, no specific restrictions are made on the length of the first section 101 and the length of the second section 102 of the slide groove 100, as long as the length of the first section 101 can meet the installation requirements and adjustment requirements of the first component 21, the second component 22 and the micro-motion component 3, and as long as the length of the second section 102 can meet the installation requirements and adjustment requirements of the third component 23.

[0057] See also Figure 2At the position of the first section 101, the second component 22 is located between the first component 21 and the micro-motion component 3, and the micro-motion component 3 is located between the second component 22 and the mounting portion 103. The purpose of this arrangement is to reduce the distance between the micro-motion component 3 and the mounting portion 103, wherein the mounting portion 103 is used to set the adjustment component 5 described later, and the adjustment component 5 is connected to the micro-motion component 3.

[0058] It should be understood that in other embodiments, at the position of the first section 101, the micro-motion component 3 can be arranged between the first component 21 and the second component 22. However, such an arrangement will cause the distance between the micro-motion component 3 and the mounting portion 103 to increase, resulting in the adjustment component 5 described later having to cross the second component 22 and connect to the micro-motion component 3.

[0059] The main function of the micro-motion component 3 is to drive the second component 22, so that the second component 22 moves along a preset path relative to the bracket 1; specifically, the micro-motion component 3 is configured as an electric micro-motion component 3, and the micro-motion component 3 can output kinetic energy to the second component 22 when receiving electric energy, so that the micro-motion component 3 drives the second component 22; since the second component 22 is used to clamp the hydroxyapatite coated fixing nail 4, and the hydroxyapatite coated fixing nail 4 is used to be connected to one of the broken bones, when the micro-motion component 3 drives the second component 22, the second component 22 can drive the hydroxyapatite coated fixing nail 4 clamped by it, and the hydroxyapatite coated fixing nail 4 can drive the broken bone to which it is connected.

[0060] The second component 22 moves along a preset path relative to the bracket 1. Specifically, the preset path can adopt the following three paths:

[0061] See also Fig.12 , path S1, if the direction from the head end D1 to the end end D2 is the X-axis direction in the three-dimensional coordinate system, then in the XY plane, the second component 22 can move along the swing path in the Y-axis direction with the X-axis as the center line under the drive of the micro-motion component 3; in path S1, the micro-motion component 3 can be implemented by an electromagnetic device, such as the electromagnetic structure of the coil, valve core and spring of the solenoid valve in the prior art.

[0062] See also Fig.13 , path two S2, if the direction from the head end D1 to the end end D2 is the X-axis direction in the three-dimensional coordinate system, then in the XY plane, the second component 22 can move along a straight path in the X-axis direction under the drive of the micro-motion component 3, wherein the second component 22 should make a reciprocating motion along the X-axis direction; in path two S2, the micro-motion component 3 can adopt the electromagnetic structure in the aforementioned path one S1, or can adopt a motor, and the motor includes a linear motor or a rotary motor, etc.

[0063] See also Fig.14 , path three S3, if the direction from the head end D1 to the end end D2 is the X-axis direction in the three-dimensional coordinate system, then in the XY plane, the second component 22 can be driven by the micro-motion component 3, that is, move along a straight path in the X-axis direction, and move along a swing path in the Y-axis direction; more specifically, with the origin of the XY plane as the starting point, the second component 22 moves to the first quadrant and the fourth quadrant under the drive of the micro-motion component 3; in path three S3, the micro-motion component 3 can use a motor and an adjustment component, the motor includes a linear motor or a rotary motor, and the adjustment component includes a connecting rod mechanism and / or an eccentric wheel, etc.

[0064] In this embodiment, see Fig.15 Specifically, a hydroxyapatite-coated fixing nail 4 is provided; at least a hydroxyapatite coating is provided on the outer surface of a threaded segment M1 (the threaded segment M1 is used to connect the broken bone) of the hydroxyapatite-coated fixing nail 4; the hydroxyapatite coating can be absorbed by the bone, and new tissue grows at the intersection of the threaded segment M1 and the broken bone, which can increase the connection stability between the hydroxyapatite-coated fixing nail 4 and the broken bone;

[0065] See also Fig.15 The hydroxyapatite coating fixing nail 4 is provided with a joint section M2 at the other end relative to the threaded section M1, and the joint section M2 is used to be connected with a tool chuck, such as a chuck of an electric drill or a chuck of a hand tool; in order to increase the stability of the connection between the hydroxyapatite coating fixing nail 4 and the chuck, the joint section M2 is preferably provided with a triangular joint structure, and the triangular joint structure is provided with three planes, and when the triangular joint structure is clamped by the corresponding chuck, three anti-rotation surfaces can be formed for preventing the fixing nail from rotating relative to the chuck, thereby making the connection between the hydroxyapatite coating fixing nail 4 and the chuck more stable;

[0066] See also Fig.15 The position of the hydroxyapatite coated fixing nail 4 between the joint section M2 and the threaded section M1 is defined as the clamping section M3. The cross section of the clamping section M3 is preferably configured as a circle, the purpose of which is to facilitate rapid positioning and connection with the clamp block assembly 2.

[0067] When the external fixation device with the micro-motion component 3 and the hydroxyapatite-coated fixing nail 4 of this embodiment is actually used, the three clamping block components 2 are respectively connected to one of the broken bones through the hydroxyapatite-coated fixing nails 4 clamped therein; when the patient is undergoing static healing and recovery (the patient's fracture site is immobile), the three clamping block components 2 are adjusted to be fixed relative to the support 1, respectively, so that any broken bone connected by the hydroxyapatite-coated fixing nail 4 is in a static state relative to the support 1, thereby avoiding the phenomenon of broken bone dislocation during the patient's static recovery process; when the medical staff determines that the broken end of the broken bone needs stress stimulation treatment, the medical staff should adjust the second component 22 (i.e., the second clamping block component 2) to The movable state is then activated to start the micro-motion component 3, and the second component 22 is driven by the micro-motion component 3. The second component 22 drives the second broken bone through the hydroxyapatite coated fixing nail 4 clamped therein, so that the second broken bone makes a slight displacement along the preset path, thereby causing the broken ends of the second broken bone, or the broken ends of the first broken bone and the broken ends of the second broken bone, or the broken ends of the second broken bone and the third broken bones, or the broken ends of all the broken bones to form stress stimulation through the slight displacement of the second broken bone; after the medical staff determines that the broken ends of the broken bones have completed the stress stimulation treatment, the medical staff should adjust the second component 22 from the movable state to the fixed state again, so that the patient can perform static healing and recovery again.

[0068] In this embodiment, one of the purposes of using the hydroxyapatite-coated fixing nail 4 is to cooperate with the movement of the micro-motion component 3; correspondingly, although fixing nails without "hydroxyapatite coating" can be used in other embodiments, the ordinary fixing nails cooperate with the movement of the micro-motion component 3, which may cause the "external fixation device" in other embodiments to have an unsatisfactory fixation effect on the broken bone;

[0069] Specifically, in this embodiment, among the three clamping block assemblies 2, the hydroxyapatite coated fixing nail 4 clamped by the first assembly 21 is defined as the first fixing nail, and the broken bone connected by the first fixing nail is defined as the first broken bone G1. Similarly, the hydroxyapatite coated fixing nail 4 clamped by the second assembly 22 is the second fixing nail, and the broken bone connected by the second fixing nail is defined as the second broken bone G2. The hydroxyapatite coated fixing nail 4 clamped by the third assembly 23 is the third fixing nail, and the broken bone connected by the third fixing nail is defined as the third broken bone G3.

[0070] When the micro-motion component 3 drives the second component 22 to move, the second fixing nail generates a movement tendency relative to the second broken bone G2. In other words, the second fixing nail applies a second force to the second broken bone G2, and the direction of the second force is along the direction from the bracket 1 to the second broken bone G2; conversely, the reverse force of the second force acts on the second component 22, the micro-motion component 3, the bracket 1, the first component 21 and the third component 23 respectively, so that the first fixing nail applies a first force to the first broken bone G1, and the third fixing nail applies a third force to the third broken bone G3, wherein the direction of the first force and the direction of the third force are respectively the directions of the reverse force of the second force;

[0071] The fixing nails without "hydroxyapatite coating" in other embodiments are defined according to the definition of the hydroxyapatite coating fixing nail 4 in this embodiment, and are defined as A fixing nail, B fixing nail and C fixing nail respectively; correspondingly, the broken bones in other embodiments are defined according to the definition of the broken bones in this embodiment, and are defined as A broken bone, B broken bone and C broken bone respectively; and the acting force between the fixing nail and the broken bone in other embodiments is defined according to the definition of the acting force between the fixing nail and the broken bone in this embodiment, and is defined as A acting force, B acting force and C acting force respectively;

[0072] Comparing this embodiment with the other embodiments mentioned above, if the first force acting on the first fixing nail to the first broken bone G1 is the same as the force A acting on the A fixing nail to the A broken bone in other embodiments, and the force has the same direction, then, since the A fixing nail is not provided with a hydroxyapatite coating, the connection stability between the A fixing nail and the A broken bone in other embodiments is lower than the connection stability between the first fixing nail and the first broken bone G1 in this embodiment, and further, in other embodiments, when the micro-motion component 3 is working, the probability that the A force destroys the connection stability between the A fixing nail and the A broken bone is relatively high. Correspondingly, in this embodiment, when the micro-motion component 3 is working, the probability that the first force destroys the connection stability between the first fixing nail and the first broken bone G1 is relatively low;

[0073] Similarly, since the B fixing nail and the C fixing nail are not provided with hydroxyapatite coating respectively, the connection stability between the B fixing nail and the broken bone B in other embodiments is lower than the connection stability between the second fixing nail and the third broken bone G3 in this embodiment, and the probability that the B force destroys the connection stability between the B fixing nail and the broken bone B is relatively high. In addition, the connection stability between the C fixing nail and the broken bone C is lower than the connection stability between the third fixing nail and the third broken bone G3 in this embodiment, and the probability that the C force destroys the connection stability between the C fixing nail and the broken bone C is relatively high.

[0074] From the above content, it can be known that since the fixing nail of the present embodiment is limited to the hydroxyapatite coated fixing nail 4, the connection stability between the fixing nail and the broken bone is increased. When the micro-motion component 3 is working, the force between the fixing nail and the broken bone is not easy to destroy the connection stability between the fixing nail and the broken bone, thereby reducing the risk of separation between the fixing nail and the broken bone, thereby avoiding the separation of the external fixation device with the micro-motion component 3 and the hydroxyapatite coated fixing nail 4 of the present embodiment from at least one broken bone of the patient, improving the safety of the use of the external fixation device with the micro-motion component 3 and the hydroxyapatite coated fixing nail 4, and ensuring the efficiency of treating fractures.

[0075] In the prior art (a minimally invasive fracture reduction and fixation system, application number 202311313041.1), since the minimally invasive fracture reduction and fixation system cannot actively drive the broken bones, the broken bones remain static relative to the minimally invasive fracture reduction and fixation system, and the broken bones cannot make slight displacements, and the broken ends of the broken bones cannot form stress stimulation, resulting in a relatively short inflammation period, relatively little cartilage tissue between two adjacent broken ends, and unable to significantly promote callus growth and fracture healing, thereby prolonging the fracture healing time and low fracture healing treatment efficiency;

[0076] In the present embodiment, a micro-motion component 3 is provided on the bracket 1. The micro-motion component 3 outputs kinetic energy to the second component 22 when receiving electrical energy. Therefore, the external fixation device having the micro-motion component 3 and the hydroxyapatite coated fixing nail 4 of the present embodiment can actively drive the broken bone through the micro-motion component 3, the second component 22 and the hydroxyapatite coated fixing nail 4 clamped on the second component 22, resulting in a slight displacement of the broken bone driven by the second component 22 and the hydroxyapatite coated fixing nail 4 clamped thereon. Stress stimulation can be formed at the broken ends of the driven broken bone, so that the inflammation period is relatively long, and the cartilage tissue between the two adjacent broken ends is relatively more, which can significantly promote the growth of callus and fracture healing, shorten the fracture healing time, and have high efficiency in fracture healing treatment.

[0077] Preferably, see Figure 4 , the external fixation device in this embodiment has a micro-motion component 3 and a hydroxyapatite-coated fixing nail 4, the micro-motion component 3 includes a housing 31, a motor 32 and a connecting rod mechanism 33;

[0078] The housing 31 is provided with a receiving cavity, and the receiving cavity and the housing 31 form a mounting opening for arranging the motor 32;

[0079] The motor 32 is disposed in the accommodating cavity, wherein the motor shaft of the motor 32 is configured as an eccentric shaft, and the motor shaft of the motor 32 points to the installation opening;

[0080] The two ends of the connecting rod mechanism 33 are respectively a head end D3 and a tail end D4. The head end D3 is arranged in the accommodating cavity and connected to the motor shaft of the motor 32. The tail end D4 is arranged outside the accommodating cavity and connected to the second component 22 through a first positioning pin 34.

[0081] The motor 32 serves as a power source for the micro-motion assembly 3. When the motor 32 receives electrical energy, the motor shaft of the motor 32 outputs kinetic energy to the outside.

[0082] The motor shaft of the motor 32 is configured as an eccentric shaft, which has at least the following two specific configurations:

[0083] Method 1: the motor shaft is configured as an integrated type, and one end of the motor shaft is set as an eccentric structure, so that the motor shaft forms an eccentric shaft;

[0084] Method 2: An eccentric component is provided on the motor shaft, and the eccentric component has an output shaft and a connecting seat. The center line of the output shaft and the center line of the connecting seat are set to an eccentric structure. When the eccentric component is connected to the motor shaft, the center line of the connecting seat and the center line of the motor shaft are set to be coaxial, so that the output shaft forms an eccentric shaft relative to the motor shaft.

[0085] See also Figure 4 The eccentric shaft of the motor 32 is connected to the head end D3 of the connecting rod mechanism 33, and the tail end D4 of the connecting rod mechanism 33 is connected to the aforementioned second component 22, wherein the connecting rod mechanism 33 and the second component 22 can be connected by a first positioning pin 34;

[0086] When the motor 32 receives electrical energy and outputs kinetic energy to the outside, the motor shaft drives the connecting rod assembly to swing, so that the connecting rod assembly drives the second component 22 to move along the path of "path three" as mentioned above, and then the second component 22 drives the hydroxyapatite coated fixing nail 4 clamped by the second component 22 to move, and the rest is not repeated.

[0087] Since the motor shaft is set as an eccentric shaft, the motor 32 in this embodiment has the following two working modes:

[0088] In the first mode, the stator of the motor 32 drives the rotor to make a circular motion, so that the motor shaft makes a circular motion;

[0089] In the second mode, when an external controller is provided, the stator of the motor 32 drives the rotor to rotate at a preset angle, and the preset angle is limited between plus and minus 90 degrees.

[0090] It should be understood that the motor 32 can adopt a motor in the prior art, and the external controller can adopt a controller in the prior art, such as a single-chip microcomputer; the specific structures and functions of the motor 32 and the external controller are common knowledge known to those skilled in the art and will not be repeated here.

[0091] The specific structure of the connecting rod mechanism 33 is common knowledge known to those skilled in the art; in this embodiment, the connecting mechanism can be specifically configured as a two-link structure or a three-link structure (see Figure 4 ), wherein a two-link structure or a three-link structure can be formed by connecting pieces of the same length, or a two-link structure or a three-link structure can be formed by connecting pieces of different lengths. The connection method between two adjacent connecting pieces is common knowledge known to those skilled in the art and will not be repeated here; the connection method between the connecting rod assembly and the eccentric shaft can adopt a connection structure in the prior art, including but not limited to: bearing connection and / or locating pin connection, bearing connection and / or spline connection, etc.

[0092] In this embodiment, the motor 32 is disposed inside the housing 31. One of the purposes of disposing the housing 31 is to facilitate the connection of the motor 32 with respect to the bracket 1, that is, the housing 31 serves as an 'intermediate connection component' for increasing the connection area between the motor 32 and the bracket 1.

[0093] The second purpose of setting the housing 31 is to limit the swing range of the connecting rod mechanism 33; Figure 6 In the external fixing device of this embodiment, which has a micro-motion component 3 and a hydroxyapatite-coated fixing nail 4, a limiting groove 35 is provided on the shell 31, and the limiting groove 35 passes through one of the side walls of the shell 31, and the limiting groove 35 is communicated with the accommodating cavity;

[0094] A portion of the connecting rod mechanism 33 is restricted in the limiting groove 35 , and a clearance fit is formed between the connecting rod mechanism 33 and the inner wall of the limiting groove 35 .

[0095] A portion of the connecting rod mechanism 33 is restricted in the limiting groove 35 . Since a clearance fit is formed between the inner wall of the limiting groove 35 and the connecting rod mechanism 33 , the swing range of the connecting rod mechanism 33 is limited.

[0096] It should be understood that the external fixing device of this embodiment having the micro-motion component 3 and the hydroxyapatite-coated fixing pin 4 is also provided with a cover plate, which is used to cover the installation port of the shell 31, so that the cover plate and the shell 31 jointly surround the motor 32, and the connecting rod mechanism 33 located in the shell 31 is surrounded by the cover plate and the shell 31.

[0097] It should be understood that, in other embodiments, although other technical solutions can be used to replace the above-mentioned technical solution of setting a limit groove 35 on the shell 31, other technical solutions must add a new structure on the outside or inside of the shell 31, thereby expanding the volume of the shell 31, resulting in the shell 31 with an enlarged volume occupying a larger space, which will affect the medical staff's observation and operation of the 'external fixation device of the micro-motion component 3 and the hydroxyapatite coated fixing nail 4' of other embodiments; conversely, in this embodiment, setting a limit groove 35 on the shell 31 to limit the swing range of the connecting rod mechanism 33 is a preferred technical solution for relatively reducing the volume of the shell 31 and reducing the space occupied by the shell 31.

[0098] As mentioned above, an external controller is provided in the present embodiment; the external controller is connected to the motor 32 only when the micro-motion mechanism needs to be controlled; specifically, a wire-passing mounting hole 36 is provided on the housing 31, and the motor 32 is provided with an interface (not shown in the figure), and the interface of the motor 32 is exposed in the wire-passing mounting hole 36, so that the external controller can be connected to the interface of the motor 32 through the connector of the control cable; the structure of the interface of the motor 32 and the structure of the connector of the control cable can adopt the interface structure and connector structure in the prior art, and no specific limitation is made here.

[0099] Furthermore, in some specific fracture scenarios, the distance between two adjacent broken bones may be relatively large. From a medical perspective, one of the necessary conditions for promoting the slight displacement of the broken bones and causing the broken ends to be stimulated by stress is that a certain amount of cartilage tissue is naturally formed between the broken ends of the two broken bones, and then the broken bones are driven to produce slight displacement, causing the broken ends to be stimulated by stress.

[0100] See also Figure 2Still taking three broken bones as an example, assuming that the distance between the first broken bone G1 and the second broken bone G2 is relatively small, after a certain amount of cartilage tissue is formed between the first broken bone G1 and the second broken bone G2, the second broken bone G2 can be driven to produce a slight displacement by the micro-motion component 3 in the aforementioned technical solution, and stress stimulation is respectively formed at the broken ends of the first broken bone G1 and the broken ends of the second broken bone G2, thereby further increasing the cartilage tissue on the basis of the certain amount of cartilage tissue already between the two broken bones, thereby promoting fracture healing; corresponding If the distance between the second broken bone G2 and the third broken bone G3 is relatively large, then although a certain amount of cartilage tissue can be generated at the broken end of the second broken bone G2 and a certain amount of cartilage tissue can be generated at the broken end of the third broken bone G3, the cartilage tissues at the two broken ends are not in contact with each other. Even if the second broken bone G2 is driven by the micro-motion component 3 in the aforementioned technical solution, the broken end of the second broken bone G2 facing the third broken bone G3 and the broken end of the third broken bone G3 facing the second broken bone G2 cannot be subjected to stress stimulation.

[0101] Therefore, in the scenario where the distance between two adjacent broken bones is relatively large, the aforementioned technical solution can no longer improve the efficiency of fracture healing treatment. The actual reason is that the aforementioned technical solution cannot shorten the distance between the two broken bones; therefore, how to shorten the distance between the two broken bones becomes a new technical problem.

[0102] See also Figure 1 , Figure 2 , Figure 5 and Figure 7 , the external fixation device having the micro-motion component 3 and the hydroxyapatite-coated fixing nail 4 of this embodiment also includes an adjustment component 5;

[0103] The adjustment component 5 is located at the mounting portion 103 and is connected to the micro-motion component 3, wherein the adjustment component 5 is configured to output a pulling force or a pushing force to the micro-motion component 3 upon receiving kinetic energy, and the micro-motion component 3 performs a stepping linear displacement motion relative to the bracket 1 under the action of the pulling force or the pushing force.

[0104] Take a three-broken-bone scenario as an example, and assume that the distance between the first broken bone G1 and the second broken bone G2 is relatively small, while the distance between the second broken bone G2 and the third broken bone G3 is relatively large;

[0105] When the external fixation device with the micro-motion component 3 and the hydroxyapatite coating fixing nail 4 of this embodiment is actually used, the hydroxyapatite coating fixing nail 4 clamped by the first component 21 is still defined as the first fixing nail, and the first fixing nail is connected to the first broken bone G1; similarly, the hydroxyapatite coating fixing nail 4 clamped by the second component 22 is still defined as the second fixing nail, and the second fixing nail is connected to the second broken bone G2, and the hydroxyapatite coating fixing nail 4 clamped by the third component 23 is still defined as the third fixing nail, and the third fixing nail is connected to the third broken bone G3;

[0106] See also Figure 2 In the above scenario, on the one hand, the medical staff drives the second component 22 through the micro-motion component 3, so that the second broken bone G2 produces a slight displacement; on the other hand, the medical staff operates the adjustment component 5, so that after receiving the force applied by the medical staff, the adjustment component 5 can apply a thrust or a pull to the micro-motion component 3, so that the micro-motion component 3 produces a step-by-step linear displacement along the direction from the second component 22 to the third component 23; because the micro-motion component 3 is connected to the second component 22, the second component 22 is connected to the second broken bone G2 through the second fixing nail clamped therein, so that when the micro-motion component 3 makes a step-by-step linear displacement, along the direction from the second component 22 to the third component 23, the second component 22, the second fixing nail and the second broken bone G2 respectively make a step-by-step linear displacement, thereby shortening the distance between the second component 22 and the third component 23.

[0107] It should be understood that when the distance between the second broken bone G2 and the third broken bone G3 is shortened and the cartilage tissue between the broken end of the second broken bone G2 facing the third broken bone G3 and the broken end of the third broken bone G3 facing the second broken bone G2 are in contact with each other, the adjustment component 5 is no longer required to be operated. At this time, a relatively small distance has been formed between the second broken bone G2 and the third broken bone G3. When the micro-motion component 3 drives the second component 22, the broken ends of the second broken bone G2 and the broken ends of the third broken bone G3 can be subjected to stress stimulation respectively.

[0108] It should be understood that the amount of displacement of the micro-motion component 3 caused by the actual operation of the adjustment component 5 by the medical staff and the time point of the adjustment should be determined according to the patient's fracture healing condition; importantly, the amount of displacement of the micro-motion component 3 caused by the adjustment component 5 should be relatively small, including but not limited to 0.2mm~1mm; if the displacement is relatively large, it is easy to break the cartilage tissue between the first broken bone G1 and the second broken bone G2.

[0109] When the external fixation device with the micro-motion component 3 and the hydroxyapatite-coated fixing nail 4 of the present embodiment is actually used, when the patient is in a static state (the fracture site of the patient is not moving) healing and recovery, the three clamping block components 2 are adjusted to be in a fixed state relative to the support 1, so that any broken bone connected by the hydroxyapatite-coated fixing nail 4 is in a static state relative to the support 1, thereby avoiding the phenomenon of broken bone dislocation during the patient's static recovery process; when the medical staff determines that the distance between the second broken bone G2 and the third broken bone G3 needs to be shortened, the medical staff should adjust the second component 22 (i.e., the second The clamping block assembly 2 is adjusted to an active state, and then the medical staff operates the adjusting assembly 5, so that the adjusting assembly 5 sequentially drives the micro-motion assembly 3, the second assembly 22, the fixing nail clamped on the second assembly 22 and the second broken bone G2 connected to the fixing nail clamped on the second assembly 22 to perform a step-by-step linear displacement movement; when the medical staff determines that the second broken bone G2 has performed a step-by-step linear displacement movement and the displacement distance meets the distance imagined by the medical staff, the medical staff should adjust the second assembly 22 from the active state to the fixed state again, so that the patient can perform static healing and recovery again.

[0110] Preferably, see Figure 3 , Figure 5 or Figure 7 , the external fixation device of this embodiment has a micro-motion component 3 and a hydroxyapatite-coated fixing nail 4, and the adjustment component 5 includes a screw 501 and an adjustment knob 502;

[0111] The mounting portion 103 is provided with a movable channel 104 for being penetrated by the screw rod 501 and a mounting cavity 105 for accommodating the adjusting knob 502, and the movable channel 104 is communicated with the mounting cavity 105 and the slide groove 100 respectively;

[0112] The external thread of the screw rod 501 is connected to the internal thread hole of the adjusting knob 502, wherein the connection between the screw rod 501 and the adjusting knob 502 is located at the connection between the installation cavity 105 and the slide groove 100;

[0113] The second slider portion 300 is provided with a positioning groove 301 for inserting the screw rod 501 and a positioning through hole 302 for inserting the second positioning pin 500. The positioning through hole 302 is communicated with the positioning groove 301. One end of the screw rod 501 is provided with an installation through hole, which is arranged in the positioning groove 301. The second positioning pin 500 is respectively inserted into the positioning through hole 302 and the installation through hole.

[0114] The specific structure of the adjusting knob 502 and the screw 501 can adopt the structure of the adjusting knob and the structure of the screw in the prior art, which will not be repeated here; the adjusting knob 502 and the screw 501 are adopted as the adjusting component 5, which utilizes the conversion of the circular motion of the adjusting knob 502 into the linear displacement motion of the screw 501, so that each time the adjusting knob 502 is turned, the step length of the linear motion of the screw 501 is a controllable length, thereby avoiding the aforementioned negative phenomenon that the displacement of the micro-motion component 3 is relatively large due to the adjustment.

[0115] For more details, see Figure 5 or Figure 7 , in the external fixation device with the micro-motion component 3 and the hydroxyapatite-coated fixing nail 4 of this embodiment, the ratio of the linear motion distance of the screw 501 and the rotation angle of the adjustment knob 502 is configured as 1 mm: 360°;

[0116] Four adjusting holes 503 are recessed on the circumferential surface of the adjusting knob 502 . The four adjusting holes 503 are distributed at equal intervals along the circumferential direction of the circumferential surface. Any one of the adjusting holes 503 is used to be inserted by a rod-shaped component.

[0117] In this embodiment, the angle of the adjusting knob 502 for each quarter turn is 90°, and the linear movement distance of the screw 501 is 0.25 mm; the angle of the adjusting knob 502 for each half turn is 180°, and the linear movement distance of the screw 501 is 0.5 mm; the angle of the adjusting knob 502 for each three quarters turn is 270°, and the linear movement distance of the screw 501 is 0.75 mm; the angle of the adjusting knob 502 for each full turn is 360°, and the linear movement distance of the screw 501 is 1 mm.

[0118] In this embodiment, the four adjustment holes 503 of the adjustment knob 502 are respectively used to be inserted by rod-shaped components, such as metal stick-shaped components or plastic stick-shaped components;

[0119] The positions of the four adjustment slots 503 and the position of the mounting portion 103 of the bracket 1 form a positional relationship as to whether the adjustment slots 503 are blocked by the mounting portion 103; specifically, the four adjustment slots 503 are installed in a clockwise or counterclockwise direction, and are defined as the first to fourth slots, respectively. Since the adjustment knob 502 is arranged in the mounting cavity 105 of the mounting portion 103, when the adjustment knob 502 is adjusted to one of the angles, the first and third slots are blocked by the mounting portion 103, and the second and fourth slots are not blocked by the mounting portion 103; therefore, the blocked adjustment slots 503 cannot be inserted by the rod-shaped component, and the rod-shaped component can only be inserted into the mounting slots that are not blocked.

[0120] When medical personnel operate the adjustment knob 502, the four adjustment hole grooves 503, in addition to being used for inserting the rod-shaped component to facilitate the operation of the medical personnel, also have a marking function similar to a ruler, which can simply and roughly remind the medical personnel the angle to which the adjustment knob 502 is turned; in addition, in addition to being used to set the installation cavity 105, the installation portion 103 also has the function of blocking the rod-shaped component to prevent the adjustment knob 502 from being rotated too large.

[0121] It should be understood that in other embodiments, the number of the adjustment hole slots 503 may be set to 5, 6 or more. This is a technical solution that can be easily thought of by those skilled in the art and will not be elaborated here.

[0122] See also Figure 5 The screw rod 501 is connected to the second slider portion 300 of the micro-motion assembly 3, and specifically adopts a positioning groove 301 and a positioning through hole 302 to be set on the second slider portion 300, and a mounting through hole is set on the screw rod 501, and the second positioning pin 500 is respectively inserted into the positioning through hole 302 and the mounting through hole to achieve connection. This connection structure is simple, reliable, and has low economic cost; in other embodiments, a screw can also be used instead of the second positioning pin 500, and correspondingly, at least an internal thread needs to be set on the hole wall of the mounting through hole of the screw rod 501, which increases some economic costs.

[0123] In the aforementioned solution with the screw 501 and the adjusting knob 502 , in order to prevent the adjusting knob 502 from being accidentally touched and rotating, thereby causing displacement of the screw 501 , this embodiment also needs to be provided with a limit function for limiting the displacement of the screw 501 .

[0124] For details, see Figure 5 or Figure 7 In the external fixation device of this embodiment having a micro-motion component 3 and a hydroxyapatite-coated fixing nail 4, a screw rod 501 is processed with a positioning surface 504, and the extending direction of the positioning surface 504 is parallel to the extending direction of the screw rod 501;

[0125] The adjustment component 5 also includes a tightening screw 505. A threaded through hole for installing the tightening screw 505 is provided on the bracket 1. The threaded through hole is connected to the movable channel 104, wherein the position where the tightening screw 505 contacts the positioning surface 504 is located at the connection between the threaded through hole and the movable channel 104.

[0126] The tightening screw 505 contacts the positioning surface 504 of the screw rod 501 to generate friction, and the friction becomes a resistance to turning the adjusting knob 502. When the tightening screw 505 and the positioning surface 504 of the screw rod 501 contact each other, if the adjusting knob 502 is accidentally touched and forms a rotation tendency, the friction between the tightening screw 505 and the positioning surface 504 of the screw rod 501 restricts the adjusting knob 502 from rotating, and the screw rod 501 cannot move. When the medical staff needs to turn the adjustment knob 502, the medical staff first turns the tightening screw 505 so that the tightening screw 505 changes from the limited state in which it contacts the positioning surface 504 of the screw rod 501 to the separated state in which the tightening screw 505 and the positioning surface 504 of the screw rod 501 are separated from each other; in the separated state, there is no friction between the tightening screw 505 and the positioning surface 504 of the screw rod 501, so that the medical staff can easily turn the adjustment knob 502.

[0127] It has been proposed in the aforementioned scheme that the micro-motion component 3 has a fixed state and a movable state relative to the bracket 1; in this embodiment, a screw 501 and an adjusting knob 502 are specifically used, and the screw 501 is connected to the micro-motion component 3, and the adjusting knob 502 is confined in the mounting cavity 105, and at the same time, the positioning surface 504 of the screw 501 can be restricted by the tightening screw 505; when the tightening screw 505 contacts the positioning surface 504, so that a friction force is formed between the screw 501 and the tightening screw 505, the friction force restricts the adjusting knob 502 to a non-rotatable state, at this time, the micro-motion component 3 forms a fixed state relative to the bracket 1; conversely, when the tightening screw 505 does not contact the positioning surface 504, so that no friction force is formed between the screw 501 and the tightening screw 505, the adjusting knob is restricted to a rotatable state, at this time, the micro-motion component 3 forms a movable state relative to the bracket 1.

[0128] Furthermore, in all the aforementioned schemes, in order to avoid the first slider portion 200 of any clamping block assembly 2 from being separated from the slide groove 100 of the bracket 1, and to avoid the second slider portion 300 of the micro-motion assembly 3 from being separated from the slide groove 100 of the bracket 1, along the direction perpendicular to or inclined to the head end D1 to the tail end D2, the following technical scheme is preferably adopted.

[0129] See also Figure 6 , Figure 8 , Fig.10 and Fig.11In the external fixation device of the present embodiment with the micro-motion component 3 and the hydroxyapatite coating fixing nail 4, the slide groove 100 penetrates the bracket 1, and the cross section of the first section 101 and the cross section of the second section 102 are respectively configured with a first contour portion L1 and a second contour portion L2, wherein the penetration direction and the cross section of the slide groove 100 are respectively perpendicular to the direction from the head end D1 to the end D2, and the slide groove 100 forms a first mouth portion 106 and a second mouth portion 107 with the surface of the bracket 1, and the opening direction of the first mouth portion 106 and the opening direction of the second mouth portion 107 are opposite to each other;

[0130] Along the direction from the first mouth portion 106 to the second mouth portion 107, the first contour portion L1 is configured as a divergent contour with a gradually increasing width, and the second contour portion L2 is configured as a parallel contour with an equal width or a convergent contour with a gradually decreasing width, wherein at the intersection of the first contour portion L1 and the second contour portion L2, the width of the first contour portion L1 is greater than the width of the second contour portion L2;

[0131] The profile of the cross section of any one of the first sliding block portions 200 is respectively the same as the profile of the first profile portion L1;

[0132] A portion of the cross-section of the second slider portion 300 has the same contour as the first contour portion L1;

[0133] The remaining contour of the cross section of the second slider portion 300 is the same as the contour of the second contour portion L2 , or the remaining contour of the cross section of the second slider portion 300 is smaller than the contour of the second contour portion L2 .

[0134] The through direction of the slide groove 100 is perpendicular to the direction from the head end D1 to the end D2 mentioned above; the first contour portion L1 of the slide groove 100 and the surface of the bracket 1 form a first opening portion 106, and the second contour portion L2 of the slide groove 100 and the surface of the bracket 1 form a second opening portion 107, and the first opening portion 106 and the second opening portion 107 are arranged back to back;

[0135] See also Fig.10 and Fig.11 , all the aforementioned clamping block assemblies 2 and fine-motion assemblies 3 are respectively arranged outside the first mouth portion 106, but any first slider portion 200 arranged in the clamping block assembly 2 is respectively located in the first mouth portion 106, and is respectively located in the slide groove 100 between the first mouth portion 106 and the second mouth portion 107; similarly, the second slider portion 300 arranged in the fine-motion assembly 3 is respectively located in the first mouth portion 106, and is respectively located in the slide groove 100 between the first mouth portion 106 and the second mouth portion 107;

[0136] See also Fig.10 and Fig.11, along the direction from the first contour portion L1 to the second contour portion L2, the first contour portion L1 is configured as a divergent contour with a gradually increasing width, and correspondingly, the contour of the cross section of the first slider portion 200 is the same as the contour of the first contour portion L1, resulting in the first slider portion 200 being blocked by the bracket 1 along the direction from the second mouth portion 107 to the first mouth portion 106, so that the first slider portion 200 cannot be separated from the bracket 1; similarly, since a portion of the contour of the cross section of the second slider portion 300 is the same as the contour of the first contour portion L1, the second slider portion 300 is blocked by the bracket 1 along the direction from the second mouth portion 107 to the first mouth portion 106, so that the second slider portion 300 cannot be separated from the bracket 1;

[0137] Correspondingly, since the width of the first contour portion L1 is greater than the width of the second contour portion L2 at the intersection of the first contour portion L1 and the second contour portion L2, the first slider portion 200 and the second slider portion 300 are respectively blocked by the bracket 1 along the direction from the first contour portion L1 to the second contour portion L2, so that the first slider portion 200 and the second slider portion 300 cannot be separated from the bracket 1 respectively;

[0138] Along the direction perpendicular to or inclined to the head end D1 to the tail end D2, under the condition that the first slider part 200 and the second slider part 300 cannot be separated from the bracket 1 respectively, the clamping block assembly 2 provided with the first slider part 200 cannot be separated from each other, and the micro-motion assembly 3 provided with the second slider part 300 cannot be separated from the bracket 1.

[0139] It should be understood that the contour of the first contour portion L1 is preferably configured as a trapezoidal contour, and correspondingly, the cross-section of the first slider portion 200 is configured as a trapezoidal contour, which makes the processing of the slide groove 100 and the first slider portion 200 of the bracket 1 easier and helps to reduce processing costs.

[0140] It should be understood that in other embodiments, the first contour portion L1 can also be configured as other contours with gradually increasing widths, for example, the two oblique sides of the trapezoidal contour are respectively configured as arc contours, or the two oblique sides of the trapezoidal contour are respectively configured as multi-segment contours, etc.

[0141] It should be understood that in other embodiments, the contour of the first contour portion L1 can also be replaced with a special-shaped contour, for example, a contour that first converges and then diverges, or a contour that first diverges and then converges; however, setting a special-shaped contour will significantly increase the processing cost of the bracket 1, the first slider portion 200 and the second slider portion 300.

[0142] Furthermore, based on the aforementioned scheme having the first mouth 106 and the second mouth 107, in order to realize the switching of the fixed state and the movable state of any clamping block assembly 2 relative to the bracket 1, and in order to realize the clamping block assembly 2 to clamp the hydroxyapatite coated fixing nail 4, it is preferably implemented by the following scheme.

[0143] See also Figure 8 and Fig. 9 , the external fixation device of this embodiment has a micro-motion component 3 and a hydroxyapatite-coated fixing nail 4, and any clamping block component 2 is respectively provided with a first clamping block 201, a second clamping block 202, a connecting screw 203 and a fixing screw 204;

[0144] The first clamping block 201 is provided with a first half groove 205, and the second clamping block 202 is provided with a second half groove 206. The number of the first half grooves 205 is the same as the number of the second half grooves 206. The position of any first half groove 205 matches the position of one of the second half grooves 206. Any hydroxyapatite coating fixing nail 4 is clamped by one of the first half grooves 205 and one of the second half grooves 206 respectively.

[0145] The length of the first clamp block 201 is greater than that of the second clamp block 202. A protrusion 208 for connecting the micro-motion assembly 3 is provided at one end of the first clamp block 201 in the length direction. The second clamp block 202 covers the first clamp block 201. The second clamp block 202 is located on the side of the protrusion 208. The first clamp block 201 and the second clamp block 202 are connected by connecting screws 203.

[0146] The first slider portion 200 of any clamping block assembly 2 is arranged on the first clamping block 201, and the second clamping block 202 is isolated from the first slider portion 200 by the first clamping block 201. When the first slider portion 200 is arranged in the slide groove 100, the fixing screw 204 is connected to the first slider portion 200 through the second mouth portion 107, and the nail head of the fixing screw 204 is blocked by the bracket 1 outside the second mouth portion 107.

[0147] Among them, see Figure 8 and Fig. 9 The first half groove 205 of the first clamping block 201 cooperates with the second half groove 206 of the second clamping block 202, and a hydroxyapatite coating fixing nail 4 is arranged between one of the first half grooves 205 and one of the second half grooves 206, and the first half groove 205 and the second half groove 206 respectively surround the hydroxyapatite coating fixing nail 4 in a semi-enclosed state;

[0148] The first clamp block 201 and the second clamp block 202 are connected by a connecting screw 203, and when the connecting screw 203 is adjusted so that the distance between its nail head and the first clamp block 201 is relatively large, the hydroxyapatite coated fixing nail 4 can be set between one of the first half grooves 205 and one of the second half grooves 206. When the connecting screw 203 is adjusted so that the distance between its nail head and the first clamp block 201 is relatively small, the first clamp block 201 and the second clamp block 202 clamp the hydroxyapatite coated fixing nail 4, thereby realizing the clamping of the hydroxyapatite coated fixing nail 4 by the clamp block assembly 2.

[0149] The fixing screw 204 is used to control the switching of the first sliding block 200 between a fixed state and a movable state relative to the bracket 1, wherein when the distance between the nail head of the fixing screw 204 and the first sliding block 200 gradually increases, the friction between the fixing screw 204 and the bracket 1 decreases, and the first sliding block 200 changes from a fixed state to a movable state relative to the bracket 1; conversely, when the distance between the nail head of the fixing screw 204 and the first sliding block 200 gradually decreases, the friction between the fixing screw 204 and the bracket 1 increases, and the first sliding block 200 changes from a movable state to a fixed state relative to the bracket 1; when the nail head of the fixing screw 204 contacts the bracket 1, the friction between the nail head of the fixing screw 204 and the bracket 1 is used to limit the displacement of the first sliding block 200, so that a fixed state is formed between the first sliding block 200 and the bracket 1.

[0150] As mentioned in the aforementioned scheme, the connecting rod mechanism 33 is connected to the second component 22 by using the first positioning pin 34; specifically, a positioning blind hole is provided on the protruding portion 208 of the first clamping block 201 of the second component 22, and correspondingly, a connecting rod through hole is provided at the tail end D4 of the connecting rod mechanism 33, and the first positioning pin 34 can be connected to the connecting rod through hole and the positioning blind hole respectively.

[0151] Furthermore, in the aforementioned scheme, since the slide groove 100 of the bracket 1 is set as the first section 101 and the second section 102, and an installation portion 103 is provided between the first section 101 and the second section 102, and the cross-section of the slide groove 100 is set as the aforementioned first contour portion L1 and the second contour portion L2, this results in the second slider portion 300 being inserted into the first section 101. The position can only be located at the head end D1 of the bracket 1, and a mouth structure must be provided at the head end D1 to facilitate the insertion of the first slider portion 200 and the second slider portion 300 respectively. If the length of the first section 101 is relatively long, in the process of screwing the aforementioned fixing screw 204, or in the actual use of the external fixation device having the micro-motion component 3 and the hydroxyapatite coated fixing nail 4, the spacing of the head end D1 of the bracket 1 may be enlarged, thereby causing the first slider portion 200 to loosen relative to the bracket 1, resulting in the bracket 1 being not firmly fixed relative to the broken bone at the first section 101.

[0152] In order to avoid the above-mentioned phenomenon of loose fixation, preferably, see Figure 1 The external fixation device of this embodiment having the micro-motion component 3 and the hydroxyapatite-coated fixing nail 4 also includes an end cover 110, which is arranged at the head end D1 of the bracket 1, and the end cover 110 is detachably connected to the head end D1.

[0153] An end cover 110 is installed at the head end D1 of the bracket 1. On the one hand, the end cover 110 can cover the mouth structure at the head end D1, and during the process of assembling the first slider portion 200 and the slide groove 100, it can prevent the first slider portion 200 from being separated from the slide groove 100 along the direction from the end D2 to the head end D1 relative to the slide groove 100. On the other hand, after the end cover 110 is connected to the head end D1, the end cover 110 serves as a supporting structure of the head end D1, thereby preventing the distance at the head end D1 of the bracket 1 from being enlarged, thereby preventing the first slider portion 200 from loosening relative to the bracket 1, so that the bracket 1 forms a firm connection structure relative to the broken bone at the first section 101.

[0154] The connection structure between the end cover 110 and the bracket 1 can be a screw connection, a positioning pin connection or a snap connection.

[0155] It should be understood that if the length of the second section 102 is relatively long, the aforementioned end cap 110 may also be provided at the end D2 of the bracket 1; the function of the end cap 110 provided at the end D2 of the bracket 1 is the same as the function of the end cap 110 provided at the head end D1 of the aforementioned bracket 1, and will not be repeated here.

[0156] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An external fixation device having a micro-motion assembly and a hydroxyapatite-coated fixation nail, characterized in that: It includes a bracket, three clamping block assemblies and the micro-motion assembly; The bracket is provided with a slide groove, and the slide groove is configured into a first section and a second section, wherein the two ends of the bracket in the length direction are a head end and a tail end respectively, the first section extends along the direction from the head end to the tail end, and the second section extends along the direction from the tail end to the head end, and the first section and the second section are separated by the mounting portion of the bracket; The three clamping block assemblies are respectively used to clamp at least one of the hydroxyapatite coating fixing nails, the three clamping block assemblies are respectively provided with a first slider portion, the micro-motion assembly is provided with a second slider portion, and any one of the first slider portion and the second slider portion respectively forms a sliding pair with the slide groove; The three clamp block components are respectively defined as a first component, a second component and a third component, wherein along the direction from the head end to the tail end, the first component, the second component and the micro-motion component are sequentially arranged in the first section, a gap is formed between the first component and the second component, the micro-motion component is connected to the second component, and the third component is arranged in the second section; The three clamping block assemblies and the micro-motion assembly respectively have a fixed state and a movable state relative to the bracket, wherein the micro-motion assembly is configured to output kinetic energy to the second assembly upon receiving electric energy, and when the second assembly is in a movable state relative to the bracket, the micro-motion assembly is used to drive the second assembly to move along a preset path, which is a swinging path and / or a straight path.

2. The external fixation device having a micro-motion component and a hydroxyapatite-coated fixation nail according to claim 1, characterized in that: The micro-motion assembly includes a housing, a motor and a connecting rod mechanism; The housing is provided with a receiving cavity, and the receiving cavity and the housing form a mounting opening for arranging the motor; The motor is arranged in the accommodating cavity, wherein the motor shaft of the motor is configured as an eccentric shaft and the motor shaft of the motor points to the installation opening; The two ends of the connecting rod mechanism are respectively a head end and a tail end, the head end is arranged in the accommodating cavity, the head end is connected to the motor shaft of the motor, the tail end is arranged outside the accommodating cavity, and the tail end is connected to the second component through a first positioning pin.

3. The external fixation device having a micro-motion component and a hydroxyapatite-coated fixation nail according to claim 3, characterized in that: The housing is provided with a limiting groove, the limiting groove passes through one of the side walls of the housing, and the limiting groove is communicated with the accommodating cavity; A portion of the connecting rod mechanism is restricted in the limiting groove, and a clearance fit is formed between the connecting rod mechanism and the inner wall of the limiting groove.

4. The external fixation device having a micro-motion component and a hydroxyapatite-coated fixation nail according to claim 1, characterized in that: Also included are adjustment components; The position of the adjustment component is located at the position of the mounting portion, and the adjustment component is connected to the micro-motion component, wherein the adjustment component is configured to output a pulling force or a pushing force to the micro-motion component when receiving kinetic energy, and the micro-motion component performs a stepping linear displacement motion relative to the bracket under the action of the pulling force or the pushing force.

5. The external fixation device having a micro-motion component and a hydroxyapatite-coated fixation nail according to claim 4, characterized in that: The adjustment assembly includes a screw and an adjustment knob; The mounting portion is provided with a movable channel for being penetrated by the screw rod and a mounting cavity for accommodating the adjusting knob, and the movable channel is communicated with the mounting cavity and the slide groove respectively; The external thread of the screw is connected to the internal thread hole of the adjusting knob, wherein the connection between the screw and the adjusting knob is located at the connecting part of the mounting cavity and the slide groove; The second sliding block portion is provided with a positioning groove for inserting the screw rod and a positioning through hole for inserting the second positioning pin, the positioning through hole and the positioning groove are communicated with each other, one end of the screw rod is provided with an installation through hole, the installation through hole is arranged in the positioning groove, and the second positioning pin is respectively inserted into the positioning through hole and the installation through hole.

6. The external fixation device having a micro-motion component and a hydroxyapatite-coated fixation nail according to claim 5, characterized in that: The ratio of the linear motion distance of the screw and the rotation angle of the adjusting knob is configured as 1 mm:360°; The circumferential surface of the adjusting knob is concavely provided with four adjusting holes, and the four adjusting holes are distributed at equal intervals along the circumferential direction of the circumferential surface, and any one of the adjusting holes is used for being inserted by a rod-shaped component.

7. The external fixation device having a micro-motion component and a hydroxyapatite-coated fixation nail according to claim 5, characterized in that: The screw is processed with a positioning surface, and the extending direction of the positioning surface is parallel to the extending direction of the screw; The adjustment assembly also includes a tightening screw, and the bracket is provided with a threaded through hole for installing the tightening screw, and the threaded through hole is communicated with the movable channel, wherein the position where the tightening screw contacts the positioning surface is located at the connection between the threaded through hole and the movable channel.

8. The external fixation device having a micro-motion component and a hydroxyapatite-coated fixation nail according to claim 1, characterized in that: The slide groove passes through the bracket, and the cross section of the first section and the cross section of the second section are respectively configured with a first contour portion and a second contour portion, wherein the penetration direction of the slide groove and the cross section are respectively perpendicular to the direction from the head end to the tail end, and the slide groove forms a first mouth portion and a second mouth portion with the surface of the bracket, and the opening direction of the first mouth portion and the opening direction of the second mouth portion are opposite to each other; Along the direction from the first mouth portion to the second mouth portion, the first contour portion is configured as a divergent contour with a gradually increasing width, and the second contour portion is configured as a parallel contour with an equal width or a convergent contour with a gradually decreasing width, wherein at the intersection of the first contour portion and the second contour portion, the width of the first contour portion is greater than the width of the second contour portion; The profile of the cross section of any one of the first sliding blocks is respectively the same as the profile of the first profile portion; A portion of the cross-section of the second slider portion has a profile that is the same as the profile of the first profile portion; The remaining contour of the cross section of the second slider portion is the same as the contour of the second contour portion, or the remaining contour of the cross section of the second slider portion is smaller than the contour of the second contour portion.

9. The external fixation device having a micro-motion component and a hydroxyapatite-coated fixation nail according to claim 8, characterized in that: Any of the clamping block assemblies is respectively provided with a first clamping block, a second clamping block, a connecting screw and a fixing screw; The first clamp block is provided with a first half groove, the second clamp block is provided with a second half groove, the number of the first half grooves is the same as the number of the second half grooves, the position of any one of the first half grooves matches the position of one of the second half grooves, and any one of the hydroxyapatite coated fixing nails is clamped by one of the first half grooves and one of the second half grooves respectively; The length of the first clamp block is greater than that of the second clamp block, one end of the first clamp block in the length direction is provided with a protrusion for connecting the micro-motion assembly, the second clamp block covers the first clamp block, the second clamp block is located on the side of the protrusion, and the first clamp block and the second clamp block are connected by the connecting screw; The first sliding block portion of any one of the clamping block assemblies is arranged on the first clamping block, and the second clamping block is isolated from the first sliding block portion by the first clamping block. When the first sliding block portion is arranged in the sliding groove, the fixing screw is connected to the first sliding block portion through the second mouth portion, and the nail head of the fixing screw is blocked by the bracket outside the second mouth portion.

10. The external fixation device having a micro-motion component and a hydroxyapatite-coated fixation nail according to claim 1, characterized in that: It also includes an end cover, which is arranged on the head end of the bracket and is detachably connected to the head end.

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