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

Abstract

The utility model 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 support, 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 utility model relates to the field of medical apparatus and instruments, and specifically relates to an external fixation device with a micro-motion assembly and a hydroxyapatite coating fixation nail. BACKGROUND

[0002] A fracture is a condition in which the continuity of a bone structure is completely or partially broken; generally speaking, a whole bone is transformed into at least two broken bones after a fracture, and the broken end of each broken bone is referred to as a fracture end (hereinafter referred to as an end).

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

[0004] Experimental phenomena show that the slight movement of the end can promote the healing of the fracture; it is manifested that the stress stimulation of the end is increased, the inflammation period is prolonged, the blood flow of the limb is increased, the cell and capillary proliferation is vigorous, the abundant periosteal callus is generated, the adjacent two ends are filled with cartilage tissue, and then solidified, which can significantly promote the growth of the callus and the healing of the fracture; from the perspective of medical treatment, during the recovery of the fracture, the limb should be allowed to move, so that the broken bones receive external forces during the movement, causing the adjacent two broken bones to produce slight displacement, and then the ends of the broken bones produce slight movement, forming stress stimulation of the ends.

[0005] However, if the aforementioned prior art minimally invasive reduction and fixation system for fractures is used for fracture recovery, since the broken bones of the patient have been fixed by the minimally invasive reduction and fixation system for fractures, the adjacent two broken bones do not produce or rarely produce slight displacement during the exercise of the limb, thereby hindering the slight movement of the end and failing to form stress stimulation of the end, resulting in prolonged fracture healing time and low efficiency of fracture healing treatment.

[0006] The actual reason for the above-mentioned low efficiency of fracture healing treatment is that the external fixation support of the prior art keeps the broken bones in a stationary state relative to the external fixation support after fixing the broken bones, so that the adjacent two broken bones cannot produce slight displacement; in another aspect, the external fixation support of the prior art cannot drive the broken bones to produce slight displacement, therefore, how to realize that the external fixation support can drive the broken bones to produce slight displacement becomes a technical problem to be solved. UTILITY MODEL CONTENT

[0007] To solve the technical problem of how to realize the external fixation device capable of driving the broken bone to produce slight displacement, the utility model provides external fixation device with micro-motion assembly and hydroxyapatite coating fixed nail.

[0008] To achieve the above object, the utility model takes the technical scheme that:

[0009] According to one aspect of the utility model, provide a kind of external fixation device with micro-motion assembly and hydroxyapatite coating fixed nail, including support, three clamping block components and the micro-motion assembly;The support is provided with sliding slot, the sliding slot is configured as first section and second section, wherein, the length direction of the support two ends are head and tail respectively, the first section extends along the direction of the head to the tail, the second section extends along the direction of the tail to the head, the first section and the second section are separated by the mounting portion of the support;Three clamping block components are used to clamp at least one hydroxyapatite coating fixed nail respectively, three clamping block components are provided with first slider respectively, the micro-motion assembly is provided with second slider, any first slider and second slider are respectively with the sliding pair of the sliding slot;Three clamping block components are defined as first component, second component and third component respectively, wherein, along the direction of the head to the tail, the first component, the second component and the micro-motion assembly are sequentially arranged in the first section, the first component and the second component form spacing, the micro-motion assembly is connected with the second component, the third component is arranged in the second section;Three clamping block components and the micro-motion assembly have fixed state and movable state relative to the support respectively, wherein, the micro-motion assembly is configured to output kinetic energy to the second component when receiving electric energy, when the second component is movable relative to the support, the micro-motion assembly is used to drive the second component to move according to preset path, and the preset path is swing path and / or straight line path.

[0010] Further, the micro-motion assembly includes a housing, a motor, and a linkage mechanism; the housing is provided with a receiving cavity, the receiving cavity and the housing form a mounting opening for arranging the motor; the motor is arranged in the receiving 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 linkage mechanism has a head end and a tail end at two ends thereof, the head end is arranged in the receiving cavity, the head end is connected to the motor shaft of the motor, the tail end is arranged outside the receiving cavity, and the tail end is connected to the second component through a first positioning pin.

[0011] Further, a limiting groove is arranged on the shell, the limiting groove penetrates one of the side walls of the shell and communicates with the accommodating cavity; one part of the connecting rod mechanism is limited in the limiting groove, and a gap fit is formed between the connecting rod mechanism and the inner wall of the limiting groove.

[0012] Further, an adjusting assembly is further included; the adjusting assembly is located at the position of the mounting part, and the adjusting assembly is connected with the micro-motion assembly, wherein the adjusting assembly is configured to output a pulling force or a pushing force to the micro-motion assembly when receiving kinetic energy, and the micro-motion assembly makes a step-by-step linear motion relative to the support under the action of the pulling force or the pushing force.

[0013] Further, the adjusting assembly includes a screw rod and an adjusting knob; the mounting part is provided with a movable channel for being penetrated by the screw rod and a mounting cavity for accommodating the adjusting knob, the movable channel respectively communicates with the mounting cavity and the sliding groove; the external thread of the screw rod is connected with the internal thread hole of the adjusting knob, wherein the connection position of the screw rod and the adjusting knob is located at the communicating position of the mounting cavity and the sliding groove; the second sliding block part is provided with a positioning groove for being inserted by the screw rod and a positioning through hole for being inserted by a second positioning pin, the positioning through hole and the positioning groove communicate with each other, one end of the screw rod 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] Further, the ratio of the linear motion distance of the screw rod to the rotation angle of the adjusting knob is configured as 1mm:360°; four adjusting hole grooves are recessed on the circumferential surface of the adjusting knob, 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 respectively used for being inserted by a rod-shaped part.

[0015] Further, the screw rod is processed with a positioning surface, the extension direction of the positioning surface is parallel to the extension direction of the screw rod; the adjusting assembly further includes a tightening screw, the support is provided with a threaded through hole for mounting the tightening screw, the threaded through hole communicates with the movable channel, and the position where the tightening screw contacts the positioning surface is located at the communicating position of the threaded through hole and the movable channel.

[0016] Further, the sliding slot is through the support, the cross section of the first section and the cross section of the second section are respectively configured with a first profile and a second profile, wherein, the through direction of the sliding slot and the cross section are respectively perpendicular to the direction from the first end to the last end, the sliding slot and the surface of the support form a first opening and a second opening respectively, the opening direction of the first opening and the opening direction of the second opening are opposite to each other; along the direction from the first opening to the second opening, the first profile is configured as a divergent profile with gradually increasing width, the second profile is configured as a parallel profile with equal width or a convergent profile with gradually decreasing width, wherein, at the intersection of the first profile and the second profile, the width of the first profile is greater than the width of the second profile; the profile of the cross section of any one of the first slider parts is the same as the profile of the first profile respectively; one part of the profile of the cross section of the second slider part is the same as the profile of the first profile; the rest of the profile of the cross section of the second slider part is the same as the profile of the second profile, or, the rest of the profile of the cross section of the second slider part is smaller than the profile of the second profile.

[0017] Further, any one of the clamp block assemblies is respectively provided with a first clamp block, a second clamp block, a connecting screw and a fixing screw; the first clamp block is provided with a first half slot, the second clamp block is provided with a second half slot, the number of the first half slots is the same as the number of the second half slots, the position of any one of the first half slots matches the position of any one of the second half slots, any one of the hydroxyapatite coating fixing nails is clamped by any one of the first half slots and any one of the second half slots respectively; the length of the first clamp block is greater than the length of the second clamp block, one end of the length direction of the first clamp block is provided with a protruding part for connecting the micro-motion assembly, the second clamp block covers the first clamp block, the second clamp block is located at the side of the protruding part, the first clamp block and the second clamp block are connected through the connecting screw; the first slider part of any one of the clamp block assemblies is arranged on the first clamp block, the second clamp block is isolated from the first slider part by the first clamp block, when the first slider part is arranged in the sliding slot, the fixing screw is connected to the first slider part through the second opening, the head part of the fixing screw is blocked outside the second opening by the support.

[0018] Further, an end cover is also included, which is arranged at the first end of the support and detachably connected with the first end.

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

[0020] The external fixing device with the micro-motion assembly and the hydroxyapatite coating fixed nail has the advantages that the micro-motion assembly, the second assembly and the hydroxyapatite coating fixed nail clamped on the second assembly are adopted, the broken bone can be driven actively, the broken bone driven by the second assembly and the hydroxyapatite coating fixed nail clamped thereon can produce slight displacement, the broken end of the driven broken bone can form stress stimulation, the inflammation period is relatively long, the cartilage tissue between the two adjacent broken ends is relatively more, the growth of the bone callus and the fracture healing can be promoted significantly, the fracture healing time is shortened, and the fracture healing treatment efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The structure schematic view of the external fixing device with the micro-motion assembly and the hydroxyapatite coating fixed nail provided in the utility model embodiment 1 is provided.

[0022] Figure 2 The structure schematic view of the external fixing device with the micro-motion assembly and the hydroxyapatite coating fixed nail provided in the utility model embodiment 1 is provided.

[0023] Figure 3 The structure schematic view of the micro-motion assembly provided in the utility model embodiment 1 is provided.

[0024] Figure 4 The structure schematic view of the external fixing device with the micro-motion assembly and the hydroxyapatite coating fixed nail provided in the utility model embodiment 1 is provided.

[0025] Figure 5 The structure schematic view of the external fixing device with the micro-motion assembly and the hydroxyapatite coating fixed nail provided in the utility model embodiment 1 is provided.

[0026] Figure 6 The structure schematic view of the micro-motion assembly provided in the utility model embodiment 1 is provided.

[0027] Figure 7 The structure schematic view of the adjusting assembly provided in the utility model embodiment 1 is provided.

[0028] Figure 8 The structure schematic view of the clamping block assembly provided in the utility model embodiment 1 is provided.

[0029] Figure 9 The structure schematic view of the clamping block assembly provided in the utility model embodiment 1 is provided.

[0030] Figure 10 The cross-sectional view of the support along the direction from the first end to the last end provided in the utility model embodiment 1 is provided.

[0031] Figure 11 A cross-sectional view of the support along the direction from the end to the head is provided for the embodiment 1 of the utility model;

[0032] Figure 12 A coordinate schematic view of path one is provided for the embodiment 1 of the utility model;

[0033] Figure 13 A coordinate schematic view of path two is provided for the embodiment 1 of the utility model;

[0034] Figure 14 A coordinate schematic view of path three is provided for the embodiment 1 of the utility model;

[0035] Figure 15 A structure schematic view of the hydroxyapatite coating fixed nail is provided for the embodiment 1 of the utility model;

[0036] Figure 16 An electrical connection diagram of the micro-motion assembly is provided for the embodiment 1 of the utility model. Specific implementation

[0037] Embodiment 1:

[0038] In the embodiment, an external fixation device with a micro-motion assembly and a hydroxyapatite coating fixed nail is provided to solve the technical problem of how to realize that the external fixation support can drive the broken bone to produce fine displacement.

[0039] Specifically, referring to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 8 , in the embodiment, the external fixation device with the micro-motion assembly 3 and the hydroxyapatite coating fixed nail 4 comprises a support 1, three clamping block assemblies 2 and the micro-motion assembly 3.

[0040] The support 1 is provided with a sliding groove 100, and the sliding groove 100 is configured as a first section 101 and a second section 102, wherein the length direction of the support 1 has two ends, which are a head end D1 and an end D2, the first section 101 extends along the direction from the head end D1 to the end D2, the second section 102 extends along the direction from the 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 support 1;

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

[0042] The three clamping block assemblies 2 are respectively defined as a first assembly 21, a second assembly 22 and a third assembly 23, wherein, along the direction from the first end D1 to the second end D2, the first assembly 21, the second assembly 22 and the micro-motion assembly 3 are sequentially arranged in the first section 101, the first assembly 21 and the second assembly 22 form a spacing, the micro-motion assembly 3 is connected with the second assembly 22, and the third assembly 23 is arranged in the second section 102.

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

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

[0045] Figure 2 In the embodiment, the support 1 is arranged in a strip or long plate shape, and the support 1 has a thickness that can be used to arrange the sliding groove 100, the length of the support 1 matches the length of the long bone, and at least the length of the support 1 can satisfy that all the broken bones are connected to the support 1 by the hydroxyapatite coating fixation nail 4;

[0046] The support 1 should have a certain hardness to reduce the deformation of the support 1 itself, which is known to those skilled in the art and will not be described here.

[0047] See Figure 1 Or Figure 2 The support 1 is provided with the sliding groove 100, one of the purposes of arranging the sliding groove 100 is to reduce the weight of the support 1, the second purpose of arranging the sliding groove 100 is to increase the contact area of the support 1 relative to the three clamping block assemblies 2 and the contact area of the support 1 relative to the micro-motion assembly 3, so as to facilitate the positioning and fixing of the three clamping block assemblies 2 and the micro-motion assembly 3 relative to the support 1, and the third purpose of arranging the sliding 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 support 1.

[0048] See Figure 1 Or Figure 2, the sliding groove 100 on the bracket 1 is configured two sections, respectively, the first section 101 and the second section 102, the mounting portion 103 provided between the first section 101 and the second section 102 separates the first section 101 and the second section 102, so that the clamp block assembly 2 or the micro-motion assembly 3 provided in the first section 101 cannot move to the second section 102, and the clamp block assembly 2 or the micro-motion assembly 3 provided in the second section 102 (in other embodiments, two micro-motion assemblies 3 can be provided on one bracket 1, one of which is provided in the second section 102) cannot move to the first section 101;

[0049] In this embodiment, referring to Figure 1 , the mounting portion 103 is provided between the first section 101 and the second section 102, and the specific role of the mounting portion 103 will be described later, which is not mentioned here; in other embodiments, the mounting portion 103 can be provided at other positions of the bracket 1, such as outside the first section 101 and the second section 102; however, the position of the mounting portion 103 in other embodiments will inevitably increase the space occupied by the bracket 1 in other embodiments; therefore, in this embodiment, the position of the mounting portion 103 is provided between the first section 101 and the second section 102, one of the purposes is to reduce the space occupied by the bracket 1.

[0050] Three clamp block assemblies 2 are provided on the bracket 1, and any one of the clamp block assemblies 2 has a fixed state and a movable state relative to the bracket 1; wherein, when any one of the clamp block assemblies 2 forms a fixed state relative to the bracket 1, the clamp block assembly 2 cannot displace relative to the bracket 1, and vice versa, when any one of the clamp block assemblies 2 forms a movable state relative to the bracket 1, it can displace relative to the bracket 1 when subjected to an external force;

[0051] Referring to Figure 1 or Figure 2 , the main role of the three clamp block assemblies 2 is to clamp the hydroxyapatite coating fixation nail 4; the hydroxyapatite coating fixation 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 coating fixation nail 4 and the clamp block assembly 2; however, in this embodiment, the external fixation device with the micro-motion assembly 3 and the hydroxyapatite coating fixation nail 4 is used in clinical use, one of the clamp block assemblies 2 (i.e. the second assembly 22) needs to be adjusted to form a movable state relative to the bracket 1, which will be described later;

[0052] Referring to Figure 1 or Figure 8, three clamping block assemblies 2 are respectively provided with first sliding block parts 200, the first sliding block parts 200 are matched with the sliding grooves 100, the first sliding block parts 200 are inserted into the sliding grooves 100, and in the direction perpendicular to the first end D1 to the last end D2, the first sliding block parts 200 form inseparable connection structures with the sliding grooves 100; correspondingly, in the direction along the first end D1 to the last end D2, the first sliding block parts 200 can slide in the sliding grooves 100; when the first sliding block parts 200 slide relative to the sliding grooves 100, the clamping block assemblies 2 with the first sliding block parts 200 slide relative to the support 1.

[0053] In the embodiment, referring to Figure 2 , three clamping block assemblies 2 are respectively defined as a first assembly 21, a second assembly 22 and a third assembly 23, the second assembly 22 is arranged between the first assembly 21 and the third assembly 23, and the second assembly 22 is connected with the micro-motion assembly 3;

[0054] Referring to Figure 1 or Figure 2 , the micro-motion assembly 3 is arranged on the support 1, and the micro-motion assembly 3 has a fixed state and a movable state relative to the support 1; when the micro-motion assembly 3 forms the fixed state relative to the support 1, the micro-motion assembly 3 cannot produce displacement relative to the support 1, and vice versa, when the micro-motion assembly 3 is in the movable state, the micro-motion assembly 3 produces displacement relative to the support 1 under the action of external force;

[0055] Referring to Figure 1 or Figure 5 , the micro-motion assembly 3 is provided with a second sliding block part 300, the second sliding block part 300 is matched with the sliding groove 100, the second sliding block part 300 is inserted into the sliding groove 100, and in the direction perpendicular to the first end D1 to the last end D2, the second sliding block part 300 forms an inseparable connection structure with the sliding groove 100; correspondingly, in the direction along the first end D1 to the last end D2, the second sliding block part 300 can slide in the sliding groove 100; when the second sliding block part 300 slides relative to the sliding groove 100, the micro-motion assembly 3 with the second sliding block part 300 slides relative to the support 1.

[0056] In the embodiment, the length of the first section 101 of the sliding groove 100 and the length of the second section 102 are not specifically limited, as long as the length of the first section 101 can meet the installation and adjustment requirements of the first assembly 21, the second assembly 22 and the micro-motion assembly 3, and as long as the length of the second section 102 can meet the installation and adjustment requirements of the third assembly 23.

[0057] Referring to Figure 2At the position of the first section 101, the second assembly 22 is located between the first assembly 21 and the micro-motion assembly 3, and the micro-motion assembly 3 is located between the second assembly 22 and the mounting portion 103, which is arranged for the adjustment assembly 5 to be connected to the micro-motion assembly 3.

[0058] It should be understood that in other embodiments, at the position of the first section 101, the micro-motion assembly 3 can be arranged between the first assembly 21 and the second assembly 22, but this arrangement will increase the distance between the micro-motion assembly 3 and the mounting portion 103, and the adjustment assembly 5 will have to pass through the second assembly 22 to be connected to the micro-motion assembly 3.

[0059] The main function of the micro-motion assembly 3 is to drive the second assembly 22 to move along a preset path relative to the bracket 1; specifically, the micro-motion assembly 3 is arranged as an electric micro-motion assembly 3, which can output kinetic energy to the second assembly 22 when receiving electric energy, forming the micro-motion assembly 3 driving the second assembly 22; since the second assembly 22 is used to clamp the hydroxyapatite coating fixation nail 4, which is used to be connected to one of the broken bones, so that when the micro-motion assembly 3 drives the second assembly 22, the second assembly 22 can drive the hydroxyapatite coating fixation nail 4 clamped thereby, and the hydroxyapatite coating fixation nail 4 can drive the broken bone connected thereby.

[0060] The second assembly 22 moves along a preset path relative to the bracket 1; specifically, the preset path can adopt the following three paths:

[0061] Referring to Figure 12 , path one S1, if the direction from the first end D1 to the second end D2 is the X-axis direction in a three-dimensional coordinate system, then in the XY plane, the second assembly 22 can move along a swing path in the Y-axis direction with the X-axis as the center line under the driving of the micro-motion assembly 3; in the path one S1, the micro-motion assembly 3 can adopt an electromagnetic device, such as the electromagnetic structure of the coil, valve core and spring of the electromagnetic valve in the prior art.

[0062] Referring to Figure 13 , path two S2, if the direction from the first end D1 to the second end D2 is the X-axis direction in a three-dimensional coordinate system, then in the XY plane, the second assembly 22 can move along a straight line path in the X-axis direction under the driving of the micro-motion assembly 3, wherein the second assembly 22 should make reciprocating motion along the X-axis direction; in the path two S2, the micro-motion assembly 3 can adopt the electromagnetic structure in the path one S1 described above, or can adopt an electric motor, including a linear motor or a rotary motor, etc.

[0063] Referring toFigure 14 If the direction from the first end D1 to the second end D2 is the X-axis direction in the three-dimensional coordinate system, the second assembly 22 can move along a linear path in the X-axis direction and an oscillating path in the Y-axis direction under the driving of the micro-motion assembly 3 in the XY plane. More specifically, the second assembly 22 moves to the first quadrant and the fourth quadrant under the driving of the micro-motion assembly 3 with the origin of the XY plane as the starting point. In the path three S3, the micro-motion assembly 3 can adopt a motor and an adjusting assembly. The motor includes a linear motor or a rotary motor, and the adjusting assembly includes a connecting rod mechanism and / or an eccentric wheel, etc.

[0064] In this embodiment, referring to Figure 15 The hydroxyapatite coating fixed nail 4 is provided. At least the outer surface of the threaded section M1 (used for connecting the fractured bone) of the hydroxyapatite coating fixed nail 4 is provided with a hydroxyapatite coating. The hydroxyapatite coating can be absorbed by the bone and new tissue grows at the intersection of the threaded section M1 and the fractured bone, which can increase the connection stability of the hydroxyapatite coating fixed nail 4 and the fractured bone.

[0065] Referring to Figure 15 The hydroxyapatite coating fixed nail 4 is provided with a joint section M2 at the other end relative to the threaded section M1, which is used to be connected by the chuck of a tool, such as the chuck of an electric drill or the chuck of a manual tool. In order to increase the stability of the connection between the hydroxyapatite coating fixed nail 4 and the chuck, the joint section M2 is preferably provided with a triangular joint structure, which is configured with three planes. When the triangular joint structure is clamped by the corresponding chuck, three anti-rotation surfaces for preventing the fixed nail from rotating relative to the chuck are formed, so that the connection between the hydroxyapatite coating fixed nail 4 and the chuck is more stable.

[0066] Referring to Figure 15 The position of the hydroxyapatite coating fixed 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 circular shape, which is convenient for quick positioning connection with the chuck block assembly 2.

[0067] In actual use of the external fixation device with the micro-motion assembly 3 and the hydroxyapatite-coated fixation pins 4 of the present embodiment, the three clamp block assemblies 2 are respectively connected to one of the fractured bones through the hydroxyapatite-coated fixation pins 4 clamped thereby; in the case of static (no movement of the fractured bones) recovery of the patient, the three clamp block assemblies 2 are adjusted to be in a fixed state relative to the support 1 respectively, so that any fractured bone connected by the hydroxyapatite-coated fixation pin 4 is in a static state relative to the support 1 respectively, thereby avoiding the misalignment of the fractured bones during the static recovery of the patient; when the medical staff determines that the fractured ends of the fractured bones need to be treated by stress stimulation, the medical staff should adjust the second assembly 22 (i.e. the second clamp block assembly 2) to be in a movable state, and then start the micro-motion assembly 3 to drive the second assembly 22, and the second assembly 22 drives the second fractured bone through the hydroxyapatite-coated fixation pin 4 clamped thereby, so that the second fractured bone makes a slight displacement along a preset path, and then the fractured end of the second fractured bone, or the fractured ends of the first and second fractured bones, or the fractured ends of the second and third fractured bones, or the fractured ends of all the fractured bones, respectively form stress stimulation through the slight displacement of the second fractured bone; after the medical staff determines that the fractured ends of the fractured bones have completed the treatment of stress stimulation, the medical staff should adjust the second assembly 22 from the movable state to the fixed state again, so that the patient can recover again in a static state.

[0068] In the present embodiment, one of the purposes of using the hydroxyapatite-coated fixation pins 4 is to cooperate with the movement of the micro-motion assembly 3; correspondingly, although fixation pins without 'hydroxyapatite coating' can be used in other embodiments, the cooperation of ordinary fixation pins with the movement of the micro-motion assembly 3 can cause the fixation effect of the 'external fixation device' in other embodiments relative to the fractured bones to be unsatisfactory.

[0069] Specifically, in the present embodiment, the hydroxyapatite-coated fixation pin 4 clamped by the first assembly 21 in the three clamp block assemblies 2 is defined as the first fixation pin, the fractured bone connected by the first fixation pin is defined as the first fractured bone G1, and by analogy, the hydroxyapatite-coated fixation pin 4 clamped by the second assembly 22 is the second fixation pin, the fractured bone connected by the second fixation pin is defined as the second fractured bone G2, and the hydroxyapatite-coated fixation pin 4 clamped by the third assembly 23 is the third fixation pin, and the fractured bone connected by the third fixation pin is defined as the third fractured bone G3.

[0070] When the micro-motion assembly 3 drives the second assembly 22 to generate motion, the second fixed nail has a motion trend relative to the second fractured bone G2, in other words, the second fixed nail applies a second force to the second fractured bone G2, and the direction of the second force is along the direction from the bracket 1 to the second fractured bone G2; in other words, the counter force of the second force acts on the second assembly 22, the micro-motion assembly 3, the bracket 1, the first assembly 21 and the third assembly 23, respectively, so that the first fixed nail applies a first force to the first fractured bone G1, and the third fixed nail applies a third force to the third fractured bone G3, wherein the directions of the first force and the third force are the directions of the counter force of the second force, respectively.

[0071] The fixed nails without the 'hydroxyapatite coating' in other embodiments are defined according to the definition of the hydroxyapatite coating fixed nail 4 in this embodiment, respectively, which are defined as A fixed nail, B fixed nail and C fixed nail, respectively; correspondingly, the fractured bones in other embodiments are defined according to the definition of the fractured bone in this embodiment, respectively, which are defined as A fractured bone, B fractured bone and C fractured bone, respectively; and the forces of the fixed nails and the fractured bones in other embodiments are defined according to the definition of the forces of the fixed nails and the fractured bones in this embodiment, respectively, which are defined as A force, B force and C force, respectively.

[0072] By comparing this embodiment with the above-mentioned other embodiments, if the first force of the first fixed nail to the first fractured bone G1 has the same force size and the same force direction as the A force of the A fixed nail to the A fractured bone in other embodiments, since the A fixed nail is not provided with the hydroxyapatite coating, the connection stability of the A fixed nail and the A fractured bone in other embodiments is lower than the connection stability of the first fixed nail and the first fractured bone G1 in this embodiment, and further, in other embodiments, when the micro-motion assembly 3 works, the probability that the A force destroys the connection stability of the A fixed nail and the A fractured bone is relatively high, and correspondingly, in this embodiment, when the micro-motion assembly 3 works, the probability that the first force destroys the connection stability of the first fixed nail and the first fractured bone G1 is relatively low.

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

[0074] As can be known from the above, since the fixing nail in the embodiment is limited to the hydroxyapatite coating fixing nail 4, the connection stability of the fixing nail and the fractured bone is increased, when the micro-motion assembly 3 is working, the force between the fixing nail and the fractured bone is not easy to damage the connection stability of the fixing nail and the fractured bone, thereby reducing the risk of separation of the fixing nail and the fractured bone, further avoiding the separation of the external fixation device with the micro-motion assembly 3 and the hydroxyapatite coating fixing nail 4 from at least one fractured bone of the patient, improving the use safety of the external fixation device with the micro-motion assembly 3 and the hydroxyapatite coating fixing nail 4, and further ensuring the efficiency of the treatment of the fracture.

[0075] In the prior art (a minimally invasive fracture reduction and fixation system, application number 202311313041.1), since the fracture reduction and fixation system cannot actively drive the fractured bone, the fractured bone remains in a stationary state relative to the fracture reduction and fixation system, the fractured bone cannot make a slight displacement, and the fracture end of the fractured bone cannot form stress stimulation, so that the inflammation period is relatively short, the cartilage tissue between the two adjacent fracture ends is relatively small, and the growth of the callus and the healing of the fracture cannot be significantly promoted, the healing time of the fracture is prolonged, and the efficiency of the healing treatment of the fracture is low.

[0076] In the embodiment, the micro-motion assembly 3 is arranged on the support 1, and the micro-motion assembly 3 outputs kinetic energy to the second assembly 22 when receiving electric energy, so that the external fixation device with the micro-motion assembly 3 and the hydroxyapatite coating fixing nail 4 can actively drive the fractured bone through the micro-motion assembly 3, the second assembly 22 and the hydroxyapatite coating fixing nail 4 clamped on the second assembly 22, so that the fractured bone driven by the second assembly 22 and the hydroxyapatite coating fixing nail 4 clamped thereon can make a slight displacement, the fracture end of the driven fractured bone can form stress stimulation, so that the inflammation period is relatively long, the cartilage tissue between the two adjacent fracture ends is relatively large, the growth of the callus and the healing of the fracture can be significantly promoted, the healing time of the fracture is shortened, and the efficiency of the healing treatment of the fracture is high.

[0077] Preferably, referring to Figure 4 The external fixation device with the micro-motion assembly 3 and the hydroxyapatite coating fixing nail 4 in the embodiment 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 arranged in the receiving 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 mounting opening;

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

[0081] The motor 32 is used as a power source of the micro-motion assembly 3, when the motor 32 receives electric energy, the motor shaft of the motor 32 outputs kinetic energy to the outside;

[0082] The motor shaft of the motor 32 is arranged as an eccentric shaft, and at least has the following two specific arrangement modes:

[0083] In a first mode, the motor shaft is configured in an integrated manner, one end of the motor shaft is arranged as an eccentric structure, so that the motor shaft forms an eccentric shaft;

[0084] In a second mode, an eccentric component is arranged on the motor shaft, the eccentric component has an output shaft and a connecting seat, the axis of the output shaft and the axis of the connecting seat are arranged as eccentric structures, when the eccentric component is connected to the motor shaft, the axis of the connecting seat and the axis of the motor shaft are arranged as coaxial, so that the output shaft forms an eccentric shaft relative to the motor shaft.

[0085] Referring to 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 second assembly 22, wherein the connecting rod mechanism 33 and the second assembly 22 can be connected by the first positioning pin 34;

[0086] When the motor 32 receives electric 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 assembly 22 to move along the path as described above in the 'path three', and then the second assembly 22 drives the hydroxyapatite coating fixed nail 4 clamped by the second assembly 22 to move, and the rest is not described in detail.

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

[0088] In a 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 a second mode, in the case that an external controller is arranged, the stator of the motor 32 drives the rotor to make a rotation with a preset angle, and the preset angle is limited between plus or minus 90 degrees.

[0090] It should be understood that the motor 32 can adopt the motor in the prior art, and the external controller can adopt the controller in the prior art, for example, a single-chip microcomputer; the specific structure and function of the motor 32 and the external controller are respectively the common knowledge known by those skilled in the art, and will not be described here.

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

[0092] In the embodiment, the motor 32 is arranged inside the shell 31, and one of the purposes of arranging the shell 31 is to facilitate the connection of the motor 32 relative to the support 1, that is, the shell 31 serves as an 'intermediate connecting component' to increase the connection area of the motor 32 and the support 1;

[0093] The second purpose of arranging the shell 31 is to limit the swing range of the connecting rod mechanism 33; specifically, see Figure 6 , the external fixation device with the micro-motion assembly 3 and the hydroxyapatite-coated fixation pin 4 in the embodiment is provided with a limiting groove 35 on the shell 31, the limiting groove 35 penetrates one of the side walls of the shell 31, and the limiting groove 35 is in communication with the accommodating cavity;

[0094] One part of the connecting rod mechanism 33 is limited in the limiting groove 35, and a gap fit is formed between the connecting rod mechanism 33 and the inner wall of the limiting groove 35.

[0095] One part of the connecting rod mechanism 33 is limited in the limiting groove 35, and a gap fit is formed between the inner wall of the limiting groove 35 and the connecting rod mechanism 33, so that the swing range of the connecting rod mechanism 33 is limited.

[0096] It should be understood that the external fixation device with the micro-motion assembly 3 and the hydroxyapatite-coated fixation pin 4 in the embodiment is also provided with a cover plate, which is used to cover the mounting port of the shell 31, so that the cover plate and the shell 31 together 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 adopted instead of the above technical solution of providing the limiting groove 35 on the shell 31, the other technical solutions must add new structures to the outside or inside of the shell 31, thereby expanding the volume of the shell 31, resulting in the expanded volume of the shell 31 occupying more space, which will affect the observation and operation of medical staff on the other embodiments of the'micro-motion assembly 3 and external fixation device of hydroxyapatite-coated fixation nail 4'. On the contrary, in the present embodiment, the limiting groove 35 is provided on the shell 31 to limit the swing range of the connecting rod mechanism 33, which is a preferred technical solution for relatively reducing the volume of the shell 31 and reducing the space occupied by the shell 31.

[0098] In the foregoing, it has been proposed that in the present embodiment, an external controller is provided; only when the micro-motion mechanism needs to be controlled, the external controller is connected with the motor 32; specifically, the shell 31 is provided with a wire passing mounting hole 36, and the motor 32 is provided with an interface (not shown in the figure), and the interface of the motor 32 is exposed to 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 the connector structure in the prior art, which is not specifically limited here.

[0099] Further, in some specific fracture scenarios, the phenomenon of relatively large spacing between the two adjacent fractured bones can also occur; from a medical point of view, one of the necessary conditions for promoting the fine displacement of the fractured bone and causing the fracture end to be stressed is to first form a certain cartilage tissue between the fracture ends of the two fractured bones, and then drive the fractured bone to produce fine displacement so that the fracture end of the fractured bone is stressed;

[0100] Referring to Figure 2, still taking the three-section broken bone as an example, assuming that the interval between the first section broken bone G1 and the second section broken bone G2 is relatively small, and a certain amount of cartilage tissue is formed between the broken end of the first section broken bone G1 and the broken end of the second section broken bone G2, the second section broken bone G2 can be driven to produce a slight displacement by the micro-motion assembly 3 in the technical solution described above, and the stress stimulation is formed at the broken end of the first section broken bone G1 and the broken end of the second section broken bone G2 respectively, so as to further increase the cartilage tissue on the basis of the certain cartilage tissue between the two section broken bones and promote fracture healing; Correspondingly, if the interval between the second section broken bone G2 and the third section broken bone G3 is relatively large, although a certain cartilage tissue can be generated at the broken end of the second section broken bone G2 and a certain cartilage tissue can be generated at the broken end of the third section broken bone G3, the cartilage tissues at the two broken ends do not contact each other, and even if the second section broken bone G2 is driven by the micro-motion assembly 3 in the technical solution described above, the broken end of the second section broken bone G2 facing the third section broken bone G3 and the broken end of the third section broken bone G3 facing the second section broken bone G2 cannot be subjected to stress stimulation;

[0101] Therefore, in the scenario where the interval between the adjacent two section broken bones is relatively large, the technical solution described above cannot form the effect of improving the fracture healing treatment efficiency, and the substantial reason is that the technical solution described above cannot shorten the interval between the two section broken bones; Therefore, how to shorten the interval between the two section broken bones becomes a new technical problem.

[0102] Referring to Figure 1 、 Figure 2 、 Figure 5 and Figure 7 , the external fixation device with the micro-motion assembly 3 and the hydroxyapatite coating fixation pin 4 of the embodiment further comprises an adjusting assembly 5.

[0103] The position of the adjusting assembly 5 is located at the position of the mounting portion 103, and the adjusting assembly 5 is connected with the micro-motion assembly 3, wherein the adjusting assembly 5 is configured to output a pulling force or a pushing force to the micro-motion assembly 3 when receiving kinetic energy, and the micro-motion assembly 3 makes a step-by-step linear displacement action relative to the support 1 under the action of the pulling force or the pushing force.

[0104] Taking the scenario of three-section broken bones as an example, and assuming that the interval between the first section broken bone G1 and the second section broken bone G2 is relatively small, and the interval between the second section broken bone G2 and the third section broken bone G3 is relatively large;

[0105] In actual use of the external fixation device with the micro-motion assembly 3 and the hydroxyapatite-coated fixation pins 4, the hydroxyapatite-coated fixation pins 4 clamped by the first assembly 21 are still defined as the first fixation pins, and the first fixation pins are connected to the first fractured bone G1; similarly, the hydroxyapatite-coated fixation pins 4 clamped by the second assembly 22 are still defined as the second fixation pins, and the second fixation pins are connected to the second fractured bone G2, and the hydroxyapatite-coated fixation pins 4 clamped by the third assembly 23 are still defined as the third fixation pins, and the third fixation pins are connected to the third fractured bone G3.

[0106] Referring to Figure 2 In the above scenario, on one hand, the medical staff drives the second assembly 22 through the micro-motion assembly 3, so that the second fractured bone G2 produces a slight displacement; on the other hand, the medical staff operates the adjusting assembly 5, so that after the adjusting assembly 5 receives the force applied by the medical staff, the adjusting assembly 5 can apply a pushing force or a pulling force to the micro-motion assembly 3, so that the micro-motion assembly 3 produces a step-by-step linear displacement action along the direction from the second assembly 22 to the third assembly 23; since the micro-motion assembly 3 is connected to the second assembly 22, the second assembly 22 is connected to the second fractured bone G2 through the second fixation pins clamped thereby, so that when the micro-motion assembly 3 produces a step-by-step linear displacement action, the second assembly 22, the second fixation pins and the second fractured bone G2 produce a step-by-step linear displacement action along the direction from the second assembly 22 to the third assembly 23, respectively, thereby shortening the distance between the second assembly 22 and the third assembly 23.

[0107] It should be understood that when the distance between the second fractured bone G2 and the third fractured bone G3 is shortened, and the cartilage tissue between the fractured end of the second fractured bone G2 facing the third fractured bone G3 and the fractured end of the third fractured bone G3 facing the second fractured bone G2 are in contact with each other, the adjusting assembly 5 is no longer operated, and at this time, the second fractured bone G2 and the third fractured bone G3 have formed a state with a relatively small distance, and when the micro-motion assembly 3 drives the second assembly 22, the fractured end of the second fractured bone G2 and the fractured end of the third fractured bone G3 can be subjected to stress stimulation.

[0108] It should be understood that the displacement amount of the micro-motion assembly 3 produced by the actual operation of the adjusting assembly 5 by the medical staff and the time node of the adjustment should be determined according to the healing condition of the patient; importantly, the displacement amount of the micro-motion assembly 3 produced by the adjusting assembly 5 should be relatively small, which includes but is not limited to 0.2mm-1mm; if the displacement amount is relatively large, the cartilage tissue between the first fractured bone G1 and the second fractured bone G2 is easily pulled apart.

[0109] In the actual use of the external fixation device with micro-motion assembly 3 and hydroxyapatite-coated fixation pins 4 of the embodiment, in the case of static (no movement of the patient's fractured bones) healing recovery of the patient, the three clamp block assemblies 2 are adjusted to be fixed relative to the support 1 respectively, so that any fractured bone connected by the hydroxyapatite-coated fixation pins 4 is in a static state relative to the support 1, thereby avoiding the phenomenon of misalignment of the fractured bones during the static recovery of the patient; when the medical staff judges that it is necessary to reduce the distance between the second fractured bone G2 and the third fractured bone G3, the medical staff should adjust the second assembly 22 (i.e. the second clamp block assembly 2) to be movable, then the medical staff operates the adjusting assembly 5, so that the adjusting assembly 5 drives the micro-motion assembly 3, the second assembly 22, the fixation pins clamped on the second assembly 22, and the second fractured bone G2 connected to the fixation pins clamped on the second assembly 22 to make a step-by-step linear displacement action; when the medical staff judges that the second fractured bone G2 has made a step-by-step linear displacement action and the displacement distance meets the distance imagined by the medical staff, the medical staff should adjust the second assembly 22 from the movable state to the fixed state again, so that the patient can again perform static healing recovery.

[0110] Preferably, referring to Figure 3 、 Figure 5 or Figure 7 , the adjusting assembly 5 of the external fixation device with micro-motion assembly 3 and hydroxyapatite-coated fixation pins 4 of the embodiment includes a screw rod 501 and an adjusting 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 sliding groove 100 respectively.

[0112] The outer thread of the screw rod 501 is connected with the inner threaded hole of the adjusting knob 502, and the connection between the screw rod 501 and the adjusting knob 502 is located at the communication position of the mounting cavity 105 and the sliding groove 100.

[0113] The second sliding block portion 300 is provided with a positioning groove 301 for being inserted by the screw rod 501 and a positioning through hole 302 for being inserted by 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 a mounting through hole arranged in the positioning groove 301, and the second positioning pin 500 is inserted into the positioning through hole 302 and the mounting through hole respectively.

[0114] The specific structure of the adjusting knob 502 and the screw rod 501 can adopt the structure of the adjusting knob and the structure of the screw rod in the prior art, which will not be described here. The adjusting knob 502 and the screw rod 501 are used as the adjusting assembly 5, which is to convert the circular motion of the adjusting knob 502 into the linear displacement motion of the screw rod 501, so that the step length of the linear displacement motion of the screw rod 501 is controllable when the adjusting knob 502 is adjusted each time, thereby avoiding the negative phenomenon that the displacement of the micro-motion assembly 3 is relatively large caused by the adjustment.

[0115] More specifically, referring to Figure 5 or Figure 7 In the external fixation device with the micro-motion assembly 3 and the hydroxyapatite-coated fixation pin 4 of the embodiment, the ratio of the linear motion distance of the screw rod 501 to the rotation angle of the adjusting knob 502 is configured as 1 mm:360°.

[0116] The four adjusting hole grooves 503 are recessed on the circumferential surface of the adjusting knob 502, and the four adjusting hole grooves 503 are distributed at equal intervals along the circumferential direction of the circumferential surface. Any one of the adjusting hole grooves 503 is used for being inserted by the rod-shaped part.

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

[0118] In the embodiment, the four adjusting hole grooves 503 of the adjusting knob 502 are used for being inserted by the rod-shaped part, such as a metal rod-shaped part or a plastic rod-shaped part.

[0119] The positions of the four adjusting hole grooves 503 and the mounting portion 103 of the bracket 1 form a positional relationship of whether the adjusting hole grooves 503 are shielded by the mounting portion 103. Specifically, the four adjusting hole grooves 503 are installed in the clockwise or counterclockwise direction, which are defined as the first hole groove to the fourth hole groove. Since the adjusting knob 502 is arranged in the mounting cavity 105 of the mounting portion 103, when the adjusting knob 502 is adjusted to one of the angles, the first hole groove and the third hole groove are shielded by the mounting portion 103, and the second hole groove and the fourth hole groove are not shielded by the mounting portion 103. Therefore, the shielded adjusting hole grooves 503 cannot be inserted by the rod-shaped part, and the rod-shaped part can only be inserted into the unshielded adjusting hole groove.

[0120] When the medical staff specifically adjusts the knob 502, the four adjusting holes 503, in addition to being inserted by the rod-shaped part to facilitate the medical staff to operate, also have a scale-like marking effect, which can simply and roughly prompt the medical staff to adjust the angle of rotation of the knob 502; in addition, the function of the mounting part 103 is to set the mounting cavity 105, and also has the function of blocking the rod-shaped part to avoid the angle of rotation of the knob 502 being too large.

[0121] It should be understood that in other embodiments, the number of adjusting holes 503 can also be set to 5, 6 or more, which is a technical solution that can be easily thought of by those skilled in the art, and will not be repeated here.

[0122] Referring to Figure 5 , the screw rod 501 is connected with the second slider part 300 of the micro-motion assembly 3, and specifically adopts a structure in which a positioning groove 301 and a positioning through hole 302 are arranged on the second slider part 300, an installation through hole is arranged on the screw rod 501, and the second positioning pin 500 is inserted into the positioning through hole 302 and the installation through hole respectively to realize the connection. This connection structure is simple, reliable and low in 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 arranged on the hole wall of the installation through hole of the screw rod 501, which increases some economic cost.

[0123] In the foregoing scheme with the screw rod 501 and the adjusting knob 502, in order to avoid the adjusting knob 502 being accidentally touched and rotated, and thus causing the screw rod 501 to displace, the embodiment also needs to be provided with a limiting function for limiting the displacement of the screw rod 501.

[0124] Specifically, referring to Figure 5 or Figure 7 , the external fixation device with the micro-motion assembly 3 and the hydroxyapatite-coated fixation pin 4 of the embodiment is provided with a positioning face 504 machined on the screw rod 501, and the extension direction of the positioning face 504 is parallel to the extension direction of the screw rod 501.

[0125] The adjusting assembly 5 also includes a tightening screw 505, and the bracket 1 is provided with a threaded through hole for installing the tightening screw 505, and the threaded through hole and the movable channel 104 are communicated, wherein the position where the tightening screw 505 contacts the positioning face 504 is located at the communication position of 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 a friction force, which becomes the resistance to rotating the adjusting knob 502; when the tightening screw 505 contacts the positioning surface 504 of the screw rod 501, if the adjusting knob 502 is accidentally touched to form a rotating tendency, the friction force between the tightening screw 505 and the positioning surface 504 of the screw rod 501 limits the adjusting knob 502 from rotating, and thus the screw rod 501 cannot be displaced; when the medical staff needs to rotate the adjusting knob 502, the medical staff first rotates the tightening screw 505, so that the tightening screw 505 changes from the limiting state of contacting the positioning surface 504 of the screw rod 501 to the separation state of separating from the positioning surface 504 of the screw rod 501; in the separation state, there is no friction force between the tightening screw 505 and the positioning surface 504 of the screw rod 501, so that the medical staff can easily rotate the adjusting knob 502.

[0127] In the foregoing scheme, it has been proposed that the micro-motion assembly 3 has a fixed state and a movable state relative to the support 1; in this embodiment, the screw rod 501 and the adjusting knob 502 are specifically used, and the screw rod 501 is connected to the micro-motion assembly 3, and the adjusting knob 502 is limited in the mounting cavity 105, and at the same time, the positioning surface 504 of the screw rod 501 can be limited by the tightening screw 505; when the tightening screw 505 contacts the positioning surface 504, so that the friction force is formed between the screw rod 501 and the tightening screw 505, the friction force limits the adjusting knob 502 from rotating, at this time, the micro-motion assembly 3 forms a fixed state relative to the support 1; on the contrary, when the tightening screw 505 does not contact the positioning surface 504, so that there is no friction force between the screw rod 501 and the tightening screw 505, the adjusting knob is limited to be rotatable, at this time, the micro-motion assembly 3 forms a movable state relative to the support 1.

[0128] Further, in all the foregoing schemes, in the direction perpendicular to or inclined to the first end D1 to the second end D2, in order to avoid that the first sliding block part 200 of any clamping block assembly 2 is separated from the sliding groove 100 of the support 1, and in order to avoid that the second sliding block part 300 of the micro-motion assembly 3 is separated from the sliding groove 100 of the support 1, the following technical scheme is preferably used.

[0129] Referring to Figure 6 , Figure 8 , Figure 10 and Figure 11The external fixation device with the micro-motion assembly 3 and the hydroxyapatite-coated fixation pin 4 in the embodiment has a sliding groove 100 through the support 1, the cross sections of the first section 101 and the second section 102 are respectively configured with a first profile L1 and a second profile L2, wherein the through direction of the sliding groove 100 and the cross section are respectively perpendicular to the direction from the first end D1 to the second end D2, the sliding groove 100 forms a first port 106 and a second port 107 with the surface of the support 1 respectively, and the opening direction of the first port 106 and the opening direction of the second port 107 are opposite to each other;

[0130] Along the direction from the first port 106 to the second port 107, the first profile L1 is configured as a diverging profile with gradually increasing width, and the second profile L2 is configured as a parallel profile with equal width or a converging profile with gradually decreasing width, wherein the width of the first profile L1 is greater than the width of the second profile L2 at the intersection of the first profile L1 and the second profile L2;

[0131] The cross section of any one of the first slider 200 has the same profile as the first profile L1;

[0132] One part of the cross section of the second slider 300 has the same profile as the first profile L1;

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

[0134] Wherein, the through direction of the sliding groove 100 is perpendicular to the direction from the first end D1 to the second end D2, the first profile L1 of the sliding groove 100 forms the first port 106 with the surface of the support 1, the second profile L2 of the sliding groove 100 forms the second port 107 with the surface of the support 1, and the first port 106 and the second port 107 are arranged in a back-to-back manner;

[0135] Referring to Figure 10 and Figure 11 All the clamp block assemblies 2 and the micro-motion assemblies 3 are arranged outside the first port 106, but any one of the first sliders 200 of the clamp block assemblies 2 is located in the first port 106 and in the sliding groove 100 between the first port 106 and the second port 107, and the second sliders 300 of the micro-motion assemblies 3 are arranged in the first port 106 and in the sliding groove 100 between the first port 106 and the second port 107;

[0136] Referring to Figure 10 and Figure 11, along the direction from the first profile L1 to the second profile L2, the first profile L1 is configured as a diverging profile with gradually increasing width, correspondingly, the cross section of the first slider 200 has the same profile as the first profile L1, resulting in that the first slider 200 is blocked by the bracket 1 along the direction from the second port 107 to the first port 106, so that the first slider 200 cannot be separated from the bracket 1; similarly, since one part of the cross section of the second slider 300 has the same profile as the first profile L1, the second slider 300 is blocked by the bracket 1 along the direction from the second port 107 to the first port 106, so that the second slider 300 cannot be separated from the bracket 1;

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

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

[0139] It should be understood that the profile of the first profile L1 is preferably configured as a trapezoidal profile, correspondingly, the cross section of the first slider 200 is configured as a trapezoidal profile, which makes the machining of the sliding groove 100 of the bracket 1 and the first slider 200 easier, and is conducive to reducing the machining cost.

[0140] It should be understood that in other embodiments, the first profile L1 can also be configured as other profiles with gradually increasing width, for example, configuring two inclined sides of the trapezoidal profile as arc-shaped profiles respectively, or configuring two inclined sides of the trapezoidal profile as multi-segment profiles, etc.

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

[0142] Further, on the basis of the aforementioned scheme with the first port 106 and the second port 107, in order to realize the switching between the fixed state and the movable state of any one of the clamping block assemblies 2 relative to the support 1, and in order to realize the clamping of the hydroxyapatite-coated fixation pegs 4 by the clamping block assemblies 2, the following scheme is preferably adopted.

[0143] Referring to Figure 8 and Figure 9 , the external fixation device with the micro-motion assembly 3 and the hydroxyapatite-coated fixation pegs 4 of the embodiment is provided with the first clamping block 201 and the second clamping block 202, the connecting screw 203 and the fixing screw 204 for any one of the clamping block assemblies 2;

[0144] The first clamping block 201 is provided with the first half slot 205, and the second clamping block 202 is provided with the second half slot 206. The number of the first half slots 205 is the same as the number of the second half slots 206. The position of any one of the first half slots 205 matches the position of any one of the second half slots 206. Any one of the hydroxyapatite-coated fixation pegs 4 is clamped by any one of the first half slots 205 and any one of the second half slots 206;

[0145] The length of the first clamping block 201 is greater than the length of the second clamping block 202. One end of the length direction of the first clamping block 201 is provided with the protruding part 208 for connecting the micro-motion assembly 3. The second clamping block 202 covers the first clamping block 201 and is located at the side of the protruding part 208. The first clamping block 201 and the second clamping block 202 are connected by the connecting screw 203;

[0146] The first sliding block part 200 of any one of the clamping block assemblies 2 is arranged on the first clamping block 201. The second clamping block 202 is isolated from the first sliding block part 200 by the first clamping block 201. When the first sliding block part 200 is arranged in the sliding groove 100, the fixing screw 204 is connected to the first sliding block part 200 through the second port 107. The head part of the fixing screw 204 is blocked outside the second port 107 by the support 1.

[0147] Referring to Figure 8 and Figure 9 , the first half slot 205 of the first clamping block 201 cooperates with the second half slot 206 of the second clamping block 202. One hydroxyapatite-coated fixation peg 4 is arranged between any one of the first half slots 205 and any one of the second half slots 206. The first half slot 205 and the second half slot 206 respectively wrap the hydroxyapatite-coated fixation peg 4 in a half-enclosed state;

[0148] The first clamping block 201 and the second clamping block 202 are connected by the connecting screw 203, and when the connecting screw 203 is adjusted to have a larger distance between the head of the screw and the first clamping block 201, the hydroxyapatite coating fixation nail 4 can be arranged between one of the first half grooves 205 and one of the second half grooves 206, and when the connecting screw 203 is adjusted to have a smaller distance between the head of the screw and the first clamping block 201, the first clamping block 201 and the second clamping block 202 clamp the hydroxyapatite coating fixation nail 4, thereby achieving clamping of the hydroxyapatite coating fixation nail 4 by the clamping block assembly 2.

[0149] The fixing screw 204 is used to control the switching between the fixed state and the movable state of the first sliding block part 200 relative to the support 1, wherein when the distance between the head of the fixing screw 204 and the first sliding block part 200 gradually increases, the friction between the fixing screw 204 and the support 1 decreases, and the first sliding block part 200 changes from the fixed state to the movable state relative to the support 1, and vice versa, when the distance between the head of the fixing screw 204 and the first sliding block part 200 gradually decreases, the friction between the fixing screw 204 and the support 1 increases, and the first sliding block part 200 changes from the movable state to the fixed state relative to the support 1; when the head of the fixing screw 204 is in contact with the support 1, the friction between the head of the fixing screw 204 and the support 1 is used to limit the displacement of the first sliding block part 200, so that the fixed state is formed between the first sliding block part 200 and the support 1.

[0150] It has been mentioned in the foregoing scheme that the connecting rod mechanism 33 is connected with the second assembly 22 by the first positioning pin 34; specifically, a positioning blind hole is arranged on the protruding part 208 of the first clamping block 201 of the second assembly 22, and correspondingly, a connecting rod through hole is arranged at the tail end D4 of the connecting rod mechanism 33, and the first positioning pin 34 is connected with the connecting rod through hole and the positioning blind hole respectively.

[0151] Further, in the foregoing scheme, since the sliding groove 100 of the support 1 is arranged as the first section 101 and the second section 102, and the mounting part 103 is arranged between the first section 101 and the second section 102, and the cross section of the sliding groove 100 is arranged as the first profile L1 and the second profile L2, it results that the position of the second sliding block part 300 inserted into the first section 101 can only be located at the head end D1 of the support 1, and a mouth structure must be arranged at the head end D1 to facilitate the insertion of the first sliding block part 200 and the second sliding block part 300, and if the length of the first section 101 is relatively long, during the process of screwing the foregoing fixing screw 204, or during the actual use of the external fixation device with the micro-motion assembly 3 and the hydroxyapatite coating fixation nail 4, it is possible that the distance of the head end D1 of the support 1 is expanded, resulting in loosening of the first sliding block part 200 relative to the support 1, and causing the support 1 to be not firmly fixed relative to the fractured bone at the first section 101.

[0152] In order to avoid the above-mentioned fixed not firm phenomenon occurs, preferably, see Figure 1 The external fixation device with the micro-motion assembly 3 and the hydroxyapatite coated fixation pin 4 of the embodiment further comprises an end cap 110, which is arranged at the first end D1 of the bracket 1 and detachably connected with the first end D1.

[0153] The end cap 110 is arranged at the first end D1 of the bracket 1, on the one hand, the end cap 110 can shield the mouth structure located at the first end D1, and in the process of assembling the first slider part 200 and the sliding groove 100, the first slider part 200 is prevented from being separated from the sliding groove 100 along the direction from the second end D2 to the first end D1, on the other hand, after the end cap 110 is connected with the first end D1, the end cap 110 serves as the support structure of the first end D1, so that the situation that the first end D1 of the bracket 1 is expanded is avoided, and then the first slider part 200 is prevented from being loose 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 cap 110 and the bracket 1 can adopt screw connection, positioning pin connection or clamping connection.

[0155] It should be understood that if the length of the second section 102 is relatively long, the end cap 110 can also be arranged at the second end D2 of the bracket 1; the end cap 110 arranged at the second end D2 of the bracket 1 has the same effect as the end cap 110 arranged at the first end D1 of the bracket 1, which will not be described here.

[0156] The above only describes the preferred embodiments of the present application, and does not limit the patent range of the present application, any equivalent structural transformation or direct or indirect application in other related technical fields based on the content of the present application and the drawings is also included in the patent protection range of the present application.

Claims

1. An external fixation device having a micromotion assembly and a hydroxyapatite-coated set screw, characterized in that, The bracket, three clamping block assemblies and the micro-motion assembly are included. The bracket is provided with a sliding groove, which is configured as 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 head end to the tail end, the second section extends along the tail end to the head end, and the first section and the second section are separated by the mounting part of the bracket. Three clamping block assemblies are respectively used to clamp at least one hydroxyapatite coating fixation pin, and each of the three clamping block assemblies is provided with a first sliding block part, and the micro-motion assembly is provided with a second sliding block part, wherein any one of the first sliding block part and the second sliding block part forms a sliding pair with the sliding groove. 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 tail end, the first assembly, the second assembly and the micro-motion assembly are sequentially arranged in the first section, a spacing is formed between the first assembly and the second assembly, the micro-motion assembly is connected with the second assembly, and the third assembly is arranged in the second section. The three clamping block assemblies and the micro-motion assembly 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 when 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 swing path and / or a straight line path.

2. An external fixation device having a micromotion assembly and a hydroxyapatite-coated set screw according to claim 1, wherein, 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 receiving 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 a head end and a tail end respectively, the head end is arranged in the receiving cavity, the head end is connected to the motor shaft of the motor, the tail end is arranged outside the receiving cavity, and the tail end is connected to the second assembly through a first positioning pin.

3. An external fixation device having a micromotion assembly and a hydroxyapatite-coated set screw according to claim 2, wherein, A limiting groove is arranged on the housing, the limiting groove penetrates one side wall of the housing, and the limiting groove is communicated with the receiving cavity. One part of the connecting rod mechanism is limited in the limiting groove, and a gap 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 assembly and a hydroxyapatite-coated set screw of claim 1, wherein, An adjusting assembly is further included. The position of the adjusting assembly is located at the position of the mounting part, and the adjusting assembly is connected with the micro-motion assembly, wherein the adjusting assembly is configured to output a pulling force or a pushing force to the micro-motion assembly when receiving kinetic energy, and the micro-motion assembly makes a step-by-step linear motion relative to the bracket under the action of the pulling force or the pushing force.

5. An external fixation device having a micromotion assembly and a hydroxyapatite-coated set screw according to claim 4, wherein, The adjusting assembly includes a screw rod and an adjusting knob. The mounting part 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 sliding groove respectively. The outer thread of the screw rod is connected with the inner thread hole of the adjusting knob, wherein the connection position of the screw rod and the adjusting knob is located at the communicating position of the installation cavity and the sliding slot; The second sliding block part is provided with a positioning slot for being inserted by the screw rod and a positioning through hole for being inserted by a second positioning pin, the positioning through hole and the positioning slot are communicated, one end of the screw rod is provided with an installation through hole, the installation through hole is arranged in the positioning slot, and the second positioning pin is inserted into the positioning through hole and the installation through hole respectively.

6. An external fixation device having a micromotion assembly and a hydroxyapatite-coated set screw according to claim 5, wherein, The ratio of the linear motion distance of the screw rod to the rotation angle of the adjusting knob is configured as 1mm:360°; Four adjusting hole grooves are arranged on the concave of the circumferential surface of the adjusting knob, 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 for being inserted by a rod-shaped part.

7. The external fixation device having a micro-motion assembly and a hydroxyapatite-coated set screw of claim 5, wherein, The screw rod is processed with a positioning surface, and the extension directions of the positioning surface and the screw rod are parallel to each other; The adjusting assembly further comprises a tightening screw, the support is provided with a threaded through hole for installing the tightening screw, the threaded through hole and the movable channel are communicated, and the position where the tightening screw contacts the positioning surface is located at the communicating position of the threaded through hole and the movable channel.

8. The external fixation device having a micro-motion assembly and a hydroxyapatite-coated set screw of claim 1, wherein, The sliding slot penetrates the support, the cross sections of the first segment and the second segment are respectively configured with a first profile part and a second profile part, wherein the penetrating direction of the sliding slot and the cross sections are respectively perpendicular to the direction from the first end to the second end, the sliding slot and the surface of the support form a first opening part and a second opening part respectively, and the opening directions of the first opening part and the second opening part are opposite to each other; Along the direction from the first opening part to the second opening part, the first profile part is configured as a diverging profile with gradually increasing width, and the second profile part is configured as a parallel profile with equal width or a converging profile with gradually decreasing width, wherein at the intersection of the first profile part and the second profile part, the width of the first profile part is greater than the width of the second profile part; The profile of the cross section of any one of the first sliding block parts is the same as the profile of the first profile part; One part of the profile of the cross section of the second sliding block part is the same as the profile of the first profile part; The remaining profile of the cross section of the second sliding block part is the same as the profile of the second profile part, or the remaining profile of the cross section of the second sliding block part is smaller than the profile of the second profile part.

9. An external fixation device having a micromotion assembly and a hydroxyapatite-coated set screw according to claim 8, wherein, Any one 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 slot, the second clamping block is provided with a second half slot, the number of the first half slots is the same as the number of the second half slots, the position of any one of the first half slots matches the position of any one of the second half slots, and any one of the hydroxyapatite coating fixing pins is clamped by any one of the first half slots and any one of the second half slots. 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 protruding part for connecting the micro-motion assembly, the second clamping block covers the first clamping block, the second clamping block is located at the side of the protruding part, and the first clamping block and the second clamping block are connected through the connecting screw; The first sliding block part of any one of the clamping block assemblies is arranged on the first clamping block, the second clamping block is isolated from the first sliding block part by the first clamping block, when the first sliding block part is arranged in the sliding groove, the fixing screw is connected to the first sliding block part through the second port, and the head part of the fixing screw is blocked outside the second port by the support.

10. The external fixation device having a micro-motion assembly and a hydroxyapatite-coated set screw of claim 1, wherein, The end cover is further arranged at the first end of the support, and the end cover is detachably connected with the first end.

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