Single-arm multi-degree-of-freedom fracture reducer

Abstract

In order to solve the deficiencies of the prior art, the present invention provides a single-arm multi-degree-of-freedom fracture reducer, comprising: a telescopic device that performs telescopic movement in the horizontal and longitudinal directions. One end of the telescopic device is fixedly connected to the fixed end of the first steering mechanism. The first steering mechanism, the second steering mechanism, and the first connecting device are connected in sequence. A Kirschner wire chuck is installed on the first connecting device. The other end of the telescopic device is fixedly connected to the fixed end of the third steering mechanism. The third steering mechanism, the fourth steering mechanism, and the second connecting device are connected in sequence. A Kirschner wire chuck is installed on the second connecting device. The single-arm multi-degree-of-freedom fracture reducer of the present invention can realize the control of at least 5 degrees of freedom directions, and can well control the Kirschner wire to perform reduction movement, thereby driving the broken bone to perform reduction movement. It is relatively labor-saving in the control and movement process of each degree of freedom, saving physical strength while reducing the frequency of X-ray filming.

Description

Technical Field

[0001] The invention belongs to the technical field of medical equipment, and in particular relates to a single-arm multi-degree-of-freedom fracture reducer. Background Art

[0002] Fracture refers to a condition in which the continuity of the bone structure is completely or partially broken. The main treatment method is to reposition and splice the broken bones through equipment or manual operation, then fix the broken bones with a fixation device and carry out rehabilitation treatment with drugs.

[0003] The existing broken bone reduction technology has the following problems: 1. The function of the reduction device is too single, and it can only be used for simple opening or closing, that is, single-degree-of-freedom movement. Broken bone reduction and positioning still require manual operation. 2. Repeated positioning is required during the reduction process. When positioning and taking X-rays, doctors always need to travel back and forth between the operating room and the operating room, which seriously affects the reduction efficiency and increases the reduction cost. 3. The accuracy of reduction is difficult to guarantee, and it basically depends on the doctor's operating experience. 4. The reduction process is very laborious, which adds an extra burden to medical staff and sometimes increases the degree of trauma to the patient. Summary of the invention

[0004] In view of the problems of the prior art, the present invention provides a single-arm multi-degree-of-freedom fracture reducer, comprising: a telescopic device that performs telescopic movement in a horizontal and longitudinal direction. One end of the telescopic device is fixedly connected to the fixed end of a first steering mechanism. The rotating end of the first steering mechanism is vertically arranged and fixedly connected to the fixed end of a second steering mechanism. The rotating end of the second steering mechanism is horizontally arranged and fixedly connected to the first connecting device. A Kirschner wire chuck is installed on the first connecting device.

[0005] Further, the other end of the telescopic device is fixedly connected to the fixed end of the third steering mechanism. The rotating end of the third steering mechanism is vertically arranged and fixedly connected to the fixed end of the fourth steering mechanism. The rotating end of the fourth steering mechanism is horizontally arranged and fixedly connected to the second connecting device. The second connecting device is equipped with a Kirschner wire chuck.

[0006] Furthermore, the telescopic device comprises: a guide screw sleeve and a guide screw. The guide screw is inserted into the guide screw sleeve and is controlled by the guide screw control device to perform horizontal and longitudinal movements along the guide screw sleeve.

[0007] Furthermore, the lead screw control device comprises: a device housing, a first bevel gear, and a second bevel gear. The device housing is fixed on the lead screw sleeve, and the lead screw passes through the device housing and is inserted into the lead screw sleeve. The first bevel gear is horizontally arranged in the device housing, and is sleeved on the outside of the lead screw and is threadedly connected with the lead screw. The second bevel gear is vertically arranged and is toothed with the first bevel gear, and the end of its gear shaft facing away from the bevel gear extends to the outside of the device housing.

[0008] Furthermore, the device housing includes: a bevel gear sleeve and a sleeve end cover, a guide cover plate, and a bevel gear sleeve that are detachably fixedly connected to the bevel gear sleeve. The sleeve end cover is fixedly connected to the guide screw sleeve, and the guide cover plate is slidably connected to the guide screw.

[0009] Furthermore, a bevel gear sleeve is provided at the end of the bevel gear sleeve facing the sleeve end cover, a first bevel gear cavity is provided inside the end facing away from the sleeve end cover along the horizontal longitudinal direction, and a second bevel gear cavity is provided at the top along the vertical direction, the first bevel gear cavity is connected with the bevel gear sleeve, and the second bevel gear cavity is connected with the first bevel gear cavity.

[0010] Furthermore, the first bevel gear comprises: a first wheel shaft arranged horizontally. An internal threaded through hole matching the guide screw is provided at the center axis of the first wheel shaft. A first bevel tooth is fixed to one end of the first wheel shaft close to the guide cover plate, and a first clamping groove is provided to one end close to the sleeve end cover. The first bevel tooth is located in the first bevel gear cavity, the first wheel shaft passes through the bevel gear sleeve and the first clamping groove extends to the outside of the bevel gear sleeve, and a first bevel gear retaining ring is clamped thereon.

[0011] Furthermore, the second bevel gear includes: a second axle is vertically arranged. A second bevel tooth is fixed to one end of the second axle close to the first bevel gear, and a second slot is provided at one end close to the bevel gear sleeve. The second bevel tooth is located in the second bevel gear cavity and is engaged with the first bevel tooth. A groove is provided at one end of the second axle facing away from the second bevel tooth, and passes through a through hole provided on the bevel gear sleeve, so that the second slot extends to the outside of the bevel gear sleeve. The second bevel gear retaining ring is inserted into the second slot located outside the bevel gear sleeve.

[0012] Furthermore, the sleeve end cover has a sleeve fixing cavity matching the bevel gear sleeve at one end facing the bevel gear sleeve, and a fixing sleeve matching the outer wall shape of the lead screw sleeve at one end facing the lead screw sleeve. The fixing sleeve is connected to the sleeve fixing cavity.

[0013] Furthermore, the guide cover plate is provided with a guide cover plate through hole matching the guide screw along the horizontal longitudinal direction.

[0014] Furthermore, the bevel gear shaft sleeve is provided with more than two first fastening screw through holes along the horizontal longitudinal direction, the guide cover plate is provided with a first fastening countersunk through hole at a corresponding position, and the sleeve end cover is provided with a first fastening threaded hole at a corresponding position. The first fastening screw passes through the first fastening countersunk through hole and the first fastening screw through hole in sequence and is screwed to the first fastening threaded hole.

[0015] Furthermore, the bevel gear sleeve is provided with two or more second fastening countersunk through holes in the vertical direction, and the top of the bevel gear sleeve is provided with a second fastening threaded hole at a corresponding position. The second fastening screw passes through the second fastening countersunk through hole and is screwed to the second fastening threaded hole.

[0016] Furthermore, the vertical top and the vertical bottom of the two horizontal end surfaces of the guide screw sleeve are provided with positioning anti-rotation concave surfaces. The end of the guide screw sleeve facing the guide screw is provided with a through hole matching the guide screw.

[0017] Furthermore, the guide screw includes: an external thread section, an installation and fixing section, and a limit block. The vertical top and vertical bottom of the external thread section are both provided with inner grooves along the horizontal longitudinal direction. The portion where the guide screw control device is slidably connected to the guide screw is provided with a protrusion matching the inner groove. The installation and fixing section is fixedly connected to the first steering mechanism.

[0018] Furthermore, the inner groove is provided with a limiter installation groove at one end close to the guide screw sleeve. A limiter is installed in the limiter installation groove through a spring. The top of the limiter faces the end of the guide screw sleeve and presents a downward inclined surface or a downward inclined arc surface. The guide screw sleeve is provided with a limit groove matching the limit block at one end close to the guide screw control device.

[0019] Furthermore, the first steering mechanism includes: a rotating mechanism, a first connecting hole fixed on the rotating mechanism and fixedly connected to the guide screw. The second steering mechanism includes: a rotating mechanism, a first horizontal base fixed horizontally on the rotating mechanism and detachably fixedly connected to the first steering mechanism. The third steering mechanism includes: a rotating mechanism, a second connecting hole fixed on the rotating mechanism and fixedly connected to the guide screw sleeve. The fourth steering mechanism includes: a rotating mechanism, a second horizontal base fixed horizontally on the rotating mechanism and detachably fixedly connected to the third steering mechanism.

[0020] Optionally, the first connecting device is an arc-shaped arm mechanism, which includes: an arc-shaped arm and a chuck mounting rod arranged in the vertical direction. The bottom end of the arc-shaped arm is provided with a first fastening connection hole matching the rotating end of the rotating mechanism in the horizontal transverse direction. The top end of the arc-shaped arm is provided with a first chuck mounting rod through hole in the horizontal longitudinal direction. The arc-shaped arm is provided with a first chuck mounting rod fastening screw hole at the chuck mounting rod through hole, which is connected to the first chuck mounting rod through hole and the hole axes are perpendicular to each other. The chuck mounting rod passes through the first chuck mounting rod through hole and is pressed and fastened by a screw passing through the first chuck mounting rod fastening screw hole. The Kirschner wire chuck is installed on the chuck mounting rod.

[0021] Optionally, the second connecting device is a fan-shaped displacement mechanism, which includes: a fan-shaped guide rail, a displacement mechanism and a clamp mounting rod.

[0022] Furthermore, the sector guide rail comprises: a guide rail fixing mechanism and a sector guide rail fixed to each other. The guide rail fixing mechanism is provided with a second fastening connection hole matching the rotating end of the rotating mechanism along the horizontal lateral direction. The outer circumferential surface of the sector guide rail is provided with worm gear teeth.

[0023] Furthermore, the displacement mechanism includes: a transmission rod, a first displacement base and a second displacement base which are arranged opposite to each other and are detachably fixedly connected to each other. The first displacement base faces the side of the second displacement base, and is provided with a first fan-shaped guide rail groove matching the fan-shaped guide rail at the lower end, and a first transmission rod groove matching the transmission rod at the upper end. The bottom end of the first transmission rod groove is connected with the top end of the first fan-shaped guide rail groove. The transmission rod is installed at the position of the first transmission rod groove, and one end of the rod extends to the outside of the first displacement base and the second displacement base, and a transmission rod rotation groove is provided on the end surface. The fan-shaped guide rail passes through the first fan-shaped guide rail groove and is gear-connected with the transmission rod.

[0024] Furthermore, the second displacement base is provided with a second transmission rod groove and a second fan-shaped guide rail groove at a position corresponding to the first displacement base, and a chuck mounting rod mounting hole is provided on the outer side wall. One end of the chuck mounting rod is fixedly connected to the chuck mounting rod mounting hole. The Kirschner wire chuck is mounted on the chuck mounting rod.

[0025] Furthermore, a mounting protrusion is provided at one end of the guide rail fixing mechanism facing the sector-shaped guide rail, and a first positioning pin hole is provided on the mounting protrusion along the horizontal longitudinal direction. A mounting groove matching the mounting protrusion is provided at one end of the sector-shaped guide rail facing the guide rail fixing mechanism, and a second positioning pin hole is provided on a side wall of the mounting groove at a position corresponding to the mounting hole. A pin or a screw passes through the second positioning pin hole and the first positioning pin hole to fix the guide rail fixing mechanism to the sector-shaped guide rail. A limit pin hole is provided at one end of the sector-shaped guide rail away from the guide rail fixing mechanism, and the limit pin is fixedly connected or screwed to the limit pin hole in a plug-in manner.

[0026] Furthermore, the first displacement base is provided with more than two base assembly countersunk holes in the horizontal longitudinal direction. The second displacement base is provided with base assembly threaded holes at corresponding positions, and the base fixing screws pass through the base assembly countersunk holes and are fixed to the base assembly threaded holes.

[0027] Furthermore, the first displacement base is provided with more than two first base positioning pin blind holes in the horizontal longitudinal direction, and the second displacement base is provided with second base positioning pin blind holes at corresponding positions. The two ends of the base positioning pin are respectively inserted into the first base positioning pin blind hole and the second base positioning pin blind hole.

[0028] Furthermore, the rotating end of the fourth steering mechanism is horizontally arranged and fixedly connected to the fixed end of the fifth steering mechanism. The rotating end of the fifth steering mechanism is horizontally arranged and fixedly connected to the second connecting device.

[0029] Furthermore, the first steering mechanism comprises: a rotating mechanism, a first connecting hole fixed on the rotating mechanism and fixedly connected to the guide screw. The third steering mechanism comprises: a rotating mechanism, a second connecting hole fixed on the rotating mechanism and fixedly connected to the guide screw sleeve. The second, fourth and fifth steering mechanisms comprise: a rotating mechanism, a vertical base fixed on the rotating mechanism and detachably fixedly connected to the corresponding device.

[0030] Optionally, the first connecting device is a connecting rod mechanism, which includes: a connecting rod and a chuck mounting rod. The connecting rod includes: a rod head and a rod arm arranged in a horizontal and transverse direction. A third rotating mechanism mounting through hole matching the rotating end of the rotating mechanism is provided at the axis of the rod arm. The rod head includes: a second chuck mounting rod through hole arranged in a horizontal and longitudinal direction, and a second chuck mounting rod fastening screw hole arranged in a vertical direction at the top end. The chuck mounting rod passes through the second chuck mounting rod through hole and is pressed and fastened by a screw passing through the second chuck mounting rod fastening screw hole. The Kirschner wire chuck is installed on the chuck mounting rod.

[0031] Optionally, the second connecting device is a sleeve rod mechanism, which includes: a T-type chuck mounting rod and a mounting rod fastening screw. The T-type chuck fastening mounting rod includes: a chuck mounting rod and a rotating mechanism mounting hole. The chuck mounting rod is provided with a rotating mechanism mounting hole matching the rotating end of the rotating mechanism at one end thereof facing the fifth steering mechanism. The mounting rod fastening screw passes through the chuck mounting rod and is screwed and fixed to the rotating end of the rotating mechanism. The Kirschner wire chuck is mounted on the outside of the chuck mounting rod.

[0032] Furthermore, the rotating mechanism comprises: a steering base, a worm wheel, and a worm. The worm wheel and the worm are perpendicular to each other and are installed in the steering base in a toothed manner. The worm wheel shaft of the worm wheel extends to the outside of the steering base and is fixed to the fixed end of other devices. One end of the worm extends to the outside of the steering base, and a worm rotation groove is provided on the end surface.

[0033] Furthermore, the steering base is provided with a worm cavity and a worm wheel cavity which are perpendicular to each other and connected to each other. The outer wall of the steering base is provided with a worm mounting hole at one end of the worm cavity and a worm shaft hole at the other end. The outer wall of the steering base is provided with a worm wheel mounting hole at one end of the worm wheel cavity and a worm wheel shaft hole at the other end.

[0034] Furthermore, the worm gear is installed in the worm gear cavity, and includes: a worm gear shaft, and turbine teeth fixed on the worm gear shaft. The bottom of one end of the worm gear shaft extending to the outside of the steering base is provided with an anti-slip installation groove along the axis, and the other end is a worm gear shaft cover installation section. A worm gear shaft cover is fixedly installed on the worm gear shaft cover installation section. A worm gear shaft cover retaining ring is sandwiched between the worm gear shaft cover and the worm gear installation hole.

[0035] Furthermore, the worm is installed in the worm cavity, and includes: a worm shaft, and an external thread fixed on the worm shaft. One end of the worm shaft extends to the outside of the steering base, and a worm rotation groove is provided on the end surface, and the other end is a worm shaft cover mounting section. A worm shaft cover is fixedly installed on the worm shaft cover mounting section. A worm shaft cover retaining ring is sandwiched between the worm shaft cover and the worm mounting hole.

[0036] Furthermore, the worm shaft is provided with a worm shaft screw hole on the end surface of one end provided with the anti-slip mounting groove. The device fixed to the worm shaft is provided with a mounting hole matching the anti-slip mounting groove at a corresponding position and is sleeved on the outside of the worm shaft. The third fastening screw passes through the mounting hole of the fixing device and is screwed to the worm shaft screw hole.

[0037] Furthermore, the single-arm multi-degree-of-freedom fracture reducer further comprises: a Kirschner wire guide. The Kirschner wire guide comprises: a guide base, a guide handle, a sliding Kirschner wire guide rod, and a fixed Kirschner wire guide rod.

[0038] Furthermore, the guide base includes a slide groove. One end of the slide groove is provided with a base blind hole, and the other end is provided with a base threaded hole. The guide handle is fixedly and detachably installed with the base blind hole, the sliding Kirschner wire guide rod is detachably and slidably fixedly installed with the slide groove, and the fixed Kirschner wire guide rod is screwed and installed with the base threaded hole.

[0039] Furthermore, the guide handle comprises: a hand-held handle portion. A mounting plug is provided at the bottom end of the hand-held handle portion. The mounting plug matches the blind hole of the base.

[0040] Furthermore, the sliding Kirschner wire guide rod includes: a first Kirschner wire sleeve, a slider, and a retaining ring. A first Kirschner wire through hole is provided at the center axis of the first Kirschner wire sleeve. The first Kirschner wire sleeve is provided with an upper baffle, a slider external thread, and a sleeve retaining ring groove in sequence from top to bottom near the top. The slider has a shape that matches the slide groove, and an internal thread hole that matches the slider external thread is provided at the vertical center axis. A lower baffle that matches the upper baffle is provided at the bottom end of the internal thread hole. Both the upper baffle and the lower baffle are wider than the groove width of the slide groove.

[0041] Furthermore, the fixed Kirschner wire guide rod comprises: a second Kirschner wire sleeve. A second Kirschner wire through hole is provided at the middle axis of the second Kirschner wire sleeve. A sleeve thread matching the base thread hole is provided at a portion of the second Kirschner wire sleeve near the top.

[0042] The horizontal longitudinal direction, horizontal transverse direction, vertical direction and other directional descriptions described in the present invention are all relative direction descriptions rather than absolute horizontal or vertical descriptions. In actual use, the bone axis to be reset is generally taken as the horizontal longitudinal direction, and the horizontal transverse direction, vertical direction and other directions change relatively based on the horizontal longitudinal direction.

[0043] The Kirschner wire clamp of the present invention adopts the existing Kirschner wire clamp with a rod hole at the rear end and a clamp at the front end. The clamp mounting rod is a round rod matching the rod hole at the rear end of the existing Kirschner wire clamp.

[0044] The present invention has at least one of the following advantages:

[0045] 1. The single-arm multi-degree-of-freedom fracture reducer of the present invention can realize the control of at least 5 degrees of freedom, and can well control the Kirschner wire to perform reduction movement, thereby driving the broken bone to perform reduction movement.

[0046] 2. The single-arm multi-degree-of-freedom fracture reducer of the present invention is relatively labor-saving in the process of controlling and moving each degree of freedom, which effectively saves the doctor's physical strength and further improves the accuracy and stability of broken bone reduction.

[0047] 3. The single-arm multi-degree-of-freedom fracture reducer of the present invention controls the movement of the Kirschner wire through a multi-degree-of-freedom control system to achieve controlled reduction of the broken bone. The operator can roughly know the relative orientation and position of the broken bone by observing the Kirschner wire, which greatly reduces the frequency of X-ray films during the reduction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 Shown is a structural schematic diagram of a single-arm multi-degree-of-freedom fracture reducer of the present invention.

[0049] Figure 2 Shown is a schematic structural diagram of the guide screw control device of the present invention.

[0050] Figure 3 Shown is a schematic structural diagram of the guide screw sleeve and the guide screw of the present invention.

[0051] Figure 3-1 Shown Figure 3 Schematic diagram of the installation structure of the middle screw sleeve and the limiter.

[0052] Figure 4 Shown is a schematic structural diagram of the first steering mechanism of the present invention.

[0053] Figure 5 Shown is a schematic structural diagram of a second steering mechanism of the present invention.

[0054] Figure 6 Shown is a schematic structural diagram of the arc arm mechanism of the present invention.

[0055] Figure 7 Shown is a schematic structural diagram of the third steering mechanism of the present invention.

[0056] Figure 8 Shown is a schematic structural diagram of the circular arc worm mechanism of the present invention.

[0057] Fig. 9 Shown is a schematic structural diagram of the displacement mechanism of the present invention.

[0058] Fig.10 Shown is a structural schematic diagram of another single-arm multi-degree-of-freedom fracture reducer of the present invention.

[0059] Fig.11 Shown is a schematic structural diagram of the connecting rod mechanism of the present invention.

[0060] Fig.12 Shown is a schematic structural diagram of the sleeve rod mechanism of the present invention.

[0061] Fig.13 Shown is a schematic structural diagram of the Kirschner wire guide of the present invention.

[0062] Figure 13-1 Shown Fig.13 Schematic diagram of the assembly structure. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0064] Example 1

[0065] The single-arm multi-degree-of-freedom fracture reducer comprises: a telescopic device that performs telescopic movement in the horizontal longitudinal direction. One end of the telescopic device is fixedly connected to the fixed end of the first steering mechanism 4. The rotating end of the first steering mechanism is vertically arranged and fixedly connected to the fixed end of the second steering mechanism. The rotating end of the second steering mechanism is horizontally arranged and fixedly connected to the first connecting device. A Kirschner wire chuck 12 is installed on the first connecting device.

[0066] The other end of the telescopic device is fixedly connected to the fixed end of the third steering mechanism 7. The rotating end of the third steering mechanism is vertically arranged and fixedly connected to the fixed end of the fourth steering mechanism. The rotating end of the fourth steering mechanism is horizontally arranged and fixedly connected to the second connecting device. The second connecting device is equipped with a Kirschner wire chuck 12.

[0067] The use process of the device is as follows: first, according to the X-ray, at least one Kirschner wire is respectively inserted in the direction of the appropriate position on the broken bone to be reset. Then, the Kirschner wire chuck 12 on the first connecting device is clamped on the Kirschner wire or the Kirschner wire group of one of the broken bones. After that, by adjusting the first steering mechanism, the second steering mechanism, the third steering mechanism, the fourth steering mechanism, and the telescopic device, the second connecting device is brought close to the Kirschner wire or the Kirschner wire group of another broken bone, and the Kirschner wire chuck 12 on the second connecting device is clamped on the Kirschner wire or the Kirschner wire group on the broken bone. Finally, by adjusting the first steering mechanism, the second steering mechanism, the third steering mechanism, and the fourth steering mechanism, the bone connection points of the two broken bones are matched with each other, and the telescopic device is adjusted to make the two groups of Kirschner wire chucks 12 close to each other, thereby driving the two parts of the broken bone to squeeze each other, thereby realizing the broken bone reset operation. Among them, the first steering mechanism controls the first connecting device to rotate clockwise or counterclockwise along the vertical axis. The second steering mechanism controls the first connecting device to rotate clockwise or counterclockwise along the vertical axis and the horizontal axis. The third steering mechanism controls the second connecting device to rotate clockwise or counterclockwise along the vertical axis. The fourth steering mechanism controls the second connecting device to rotate clockwise or counterclockwise along the horizontal axis. The telescopic device controls the first connecting device and the second connecting device to perform relative telescopic movement along the horizontal longitudinal direction.

[0068] Example 2

[0069] Based on the single-arm multi-degree-of-freedom fracture reducer of Example 1, Figure 1 and Figure 2 As shown, the telescopic device comprises: a guide screw sleeve 3 and a guide screw 2. The guide screw 2 is inserted into the guide screw sleeve 3 and is controlled by the guide screw control device 1 to perform horizontal and longitudinal movements along the guide screw sleeve 3.

[0070] The lead screw control device 1 comprises: a device housing, a first bevel gear 103, and a second bevel gear 106. The device housing is fixed on the lead screw sleeve 3, and the lead screw 2 passes through the device housing and is inserted into the lead screw sleeve 3. The first bevel gear 103 is horizontally arranged in the device housing, and is sleeved on the outside of the lead screw 2 and is threadedly connected with the lead screw 2. The second bevel gear 106 is vertically arranged and is toothed with the first bevel gear 103, and the end of its gear shaft facing away from the bevel gear extends to the outside of the device housing.

[0071] The device housing includes: a sleeve end cover 102 detachably fixedly connected to the bevel gear sleeve 101, a guide cover plate 104, and a bevel gear sleeve 107. The sleeve end cover 102 is fixedly connected to the guide screw sleeve 3, and the guide cover plate 104 is slidably connected to the guide screw 2.

[0072] A bevel gear sleeve 1013 is provided at one end of the bevel gear sleeve 101 facing the sleeve end cover 102, a first bevel gear cavity 1011 is provided inside the end facing away from the sleeve end cover 102 along the horizontal longitudinal direction, and a second bevel gear cavity 1012 is provided at the top along the vertical direction, the first bevel gear cavity 1011 is connected to the bevel gear sleeve 1013, and the second bevel gear cavity 1012 is connected to the first bevel gear cavity 1011.

[0073] The first bevel gear 103 includes: a first wheel shaft 1035 arranged horizontally. An internal threaded through hole 1033 matching the lead screw 2 is provided at the center axis of the first wheel shaft 1035. A first bevel tooth 1031 is fixed to one end of the first wheel shaft 1035 close to the guide cover plate 104, and a first clamping groove 1034 is provided to one end of the first wheel shaft 1035 close to the sleeve end cover 102. The first bevel tooth 1031 is located in the first bevel gear cavity 1011, and the first wheel shaft 1035 passes through the bevel gear sleeve 1013 and extends the first clamping groove 1034 to the outside of the bevel gear sleeve 1013, and is clamped with the first bevel gear retaining ring 110.

[0074] The second bevel gear 106 includes: a second axle 1064 is vertically arranged. A second bevel tooth 1061 is fixed to one end of the second axle 1064 close to the first bevel gear 103, and a second clamping groove 1062 is provided at one end close to the bevel gear sleeve 107. The second bevel tooth 1061 is located in the second bevel gear cavity 1012 and is gear-engaged with the first bevel tooth 1031. A groove 1063 is provided at one end of the second axle 1064 facing away from the second bevel tooth 1061, and passes through a through hole provided on the bevel gear sleeve 107, so that the second clamping groove 1062 extends to the outside of the bevel gear sleeve 107. The second bevel gear retaining ring 108 is clamped into the second clamping groove 1062 located outside the bevel gear sleeve 107.

[0075] The sleeve end cover 102 has a sleeve fixing cavity 1021 matching the bevel gear sleeve 1013 at one end facing the bevel gear sleeve 101, and a fixing sleeve 1022 matching the outer wall shape of the lead screw sleeve 3 at one end facing the lead screw sleeve 3. The fixing sleeve 1022 is in communication with the sleeve fixing cavity 1021.

[0076] The guide cover plate 104 is provided with a guide cover plate through hole 1041 matching the guide screw 2 along the horizontal longitudinal direction.

[0077] After the device is installed, the guide screw 2 first passes through the guide cover plate through hole 1041 and then engages with the internal threaded through hole 1033 of the first bevel gear 103, and then passes through the internal threaded through hole 1033 into the guide screw sleeve 3 to be slidably connected with the guide screw sleeve 3. At this time, a screwdriver is inserted into the groove 1063 or other auxiliary tools are used to drive the second wheel shaft 1064 to rotate, thereby driving the second bevel tooth 1061 fixed to the second wheel shaft 1064 to rotate, and the second bevel tooth 1061 drives the first bevel tooth 1031 connected thereto to rotate, and the first bevel tooth 1031 drives the first wheel shaft 1035 fixed thereto to rotate. Since the lead screw control device 1 is fixed to the lead screw sleeve 3, the components in the lead screw control device 1 are all fixedly connected or fixedly rotatably connected. Therefore, when an external force drives the first wheel shaft 1035 to rotate, the lead screw 2 connected to the internal threaded through hole 1033 of the first wheel shaft 1035 telescopes relative to the first wheel shaft 1035 under the action of the thread, thereby realizing the telescopic movement of the lead screw 2 relative to the guide screw sleeve 3 controlled by the lead screw control device 1.

[0078] Example 3

[0079] Based on the single-arm multi-degree-of-freedom fracture reducer of Example 1, Figure 2 As shown, the bevel gear sleeve 101 is provided with two or four first fastening screw through holes 1014 in the horizontal longitudinal direction, the guide cover plate 104 is provided with a first fastening countersunk through hole 1042 at a corresponding position, and the sleeve end cover 102 is provided with a first fastening threaded hole 1023 at a corresponding position. The fastening screw threaded through hole 1042 is provided with a chamfered surface matching the first fastening screw 105 at one end facing away from the bevel gear sleeve (101). The first fastening screw 105 passes through the first fastening screw through hole 1042 and the second fastening screw through hole 1014 in sequence and is screwed to the first fastening threaded hole 1023. This arrangement enables the bevel gear sleeve 101, the guide cover plate 104, and the sleeve end cover 102 to be detachably fixed. When necessary, the four first fastening screws 105 can be removed to separate the bevel gear sleeve 101, the guide cover plate 104, and the sleeve end cover 102 so as to replace the components therein.

[0080] The bevel gear sleeve 107 is provided with two or four second fastening countersunk through holes 1072 in the vertical direction, and the top of the bevel gear sleeve 101 is provided with a second fastening threaded hole 1015 at a corresponding position. The second fastening screw 109 passes through the second fastening countersunk through hole 1072 and is screwed to the second fastening threaded hole 1015. This arrangement enables the bevel gear sleeve 101 and the bevel gear sleeve 107 to be detachably fixed. When necessary, the four second fastening screws 109 can be removed to separate the bevel gear sleeve 101 and the bevel gear sleeve 107 so as to replace the components therein.

[0081] Example 4

[0082] Based on the single-arm multi-degree-of-freedom fracture reducer of Example 2, Figure 3 As shown, the vertical top and the vertical bottom of the two horizontal end surfaces of the lead screw sleeve 3 are provided with positioning anti-rotation concave surfaces 302. Compared with the cylindrical installation end surface of the lead screw sleeve 3, the added positioning anti-rotation concave surfaces 302 can effectively increase the installation stability between the lead screw sleeve 3 and the third steering mechanism and the lead screw control device 1. The end of the lead screw sleeve 3 facing the lead screw 2 is provided with a through hole matching the lead screw 2.

[0083] The guide screw 2 includes: an external thread section 201 and an installation and fixing section 202. The vertical top and vertical bottom of the external thread section 201 are both provided with an inner groove 203 along the horizontal longitudinal direction. The portion of the guide screw control device 1 that is slidably connected to the guide screw 2 is provided with a protrusion that matches the inner groove 203. The installation and fixing section 202 is fixedly connected to the first steering mechanism 4. This setting can force the guide screw 2 to perform telescopic movement relative to the first wheel shaft 1035 rather than axial rotation when being driven by the first wheel shaft 1035.

[0084] like Figure 3-1 As shown, the inner groove 203 is provided with a limiter installation groove 205 at one end close to the guide screw sleeve 3. The limiter 204 is installed in the limiter installation groove 205 through a spring 206. The top of the limiter 204 faces the end of the guide screw sleeve 3 and presents a downward inclined surface or a downward inclined arc surface. The guide screw sleeve 3 is provided with a limit groove matching the limit block 204 at one end close to the guide screw control device 1.

[0085] When the guide screw 2 slides inwardly relative to the guide screw sleeve 3, the stopper 204 is pressed down by the inner wall of the guide screw sleeve 3 until it is retracted into the stopper installation groove 205, thereby not affecting the sliding of the guide screw 2 relative to the guide screw sleeve 3. When the guide screw 2 slides outwardly relative to the guide screw sleeve 3 to the limiting groove, the stopper 204 is bounced up by the spring 206 and pushed into the limiting groove, thereby limiting the movement of the guide screw 2 and preventing the guide screw 2 from sliding out of the guide screw sleeve 3. At this time, when the guide screw 2 needs to slide inwardly relative to the guide screw sleeve 3 again, it only needs to apply a certain external force so that the stopper 204 presses the stopper 204 along the lower inclined surface or lower inclined arc surface of the stopper 204 on the inner wall of the limiting groove, so that it is retracted into the stopper installation groove 205 again.

[0086] Example 5

[0087] Based on the single-arm multi-degree-of-freedom fracture reducer of Example 2, Figure 1 and Figure 4 As shown, the first steering mechanism 4 includes: a rotating mechanism 17, and a first connecting hole 401 fixed on the rotating mechanism 17 and detachably fixedly connected to the lead screw 2. Figure 1 and Figure 5 As shown, the second steering mechanism 5 includes: a rotating mechanism 17, and a first horizontal base 501 horizontally fixed on the rotating mechanism 17 and detachably fixedly connected to the first steering mechanism 4. Figure 1 and Figure 7 As shown, the third steering mechanism 7 includes: a rotating mechanism 17, and a second connecting hole 701 fixed on the rotating mechanism 17 and detachably fixedly connected to the guide screw sleeve 3. Figure 1 and Figure 8 As shown, the fourth steering mechanism includes: a rotating mechanism 17, and a second horizontal base 801 horizontally fixed on the rotating mechanism 17 and detachably fixedly connected to the third steering mechanism 7. The rotating mechanism 17 is used to drive the mechanism fixed to the rotating end to perform controllable relative rotation relative to the mechanism fixed to the fixed end.

[0088] The first connecting device is an arc-shaped arm mechanism, such as Figure 6As shown, the mechanism includes: an arc-shaped arm 601 arranged in the vertical direction and a chuck mounting rod 11. The bottom end of the arc-shaped arm 601 is provided with a first fastening connection hole 6011 along the horizontal horizontal direction that matches the rotating end of the rotating mechanism 17. The top end of the arc-shaped arm 601 is provided with a first chuck mounting rod through hole 6012 along the horizontal longitudinal direction. The arc-shaped arm 601 is provided with a first chuck mounting rod fastening screw hole 6013 at the chuck mounting rod through hole 6012, which is connected with the first chuck mounting rod through hole 6012 and the hole axes are perpendicular to each other. The chuck mounting rod 11 passes through the first chuck mounting rod through hole 6012 and is pressed and fastened by a screw passing through the first chuck mounting rod fastening screw hole 6013. The Kirschner wire chuck 12 is installed on the chuck mounting rod 11. The arc-shaped arm 601 can form a certain height difference and distance difference between the K-wire chuck 12 and the rotating mechanism and the guide screw 2, so that there is enough space between the device and the K-wire for matching and adjustment.

[0089] The second connecting device is a fan-shaped displacement mechanism, which includes: a fan-shaped guide rail 9, a displacement mechanism 10 and a clamp mounting rod 11.

[0090] like Figure 8 As shown, the sector guide rail 9 comprises: a guide rail fixing mechanism 901 and a sector guide rail 903 fixed to each other. The guide rail fixing mechanism 901 is provided with a second fastening connection hole 9011 along the horizontal direction to match the rotating end of the rotating mechanism 17. The outer circumferential surface of the sector guide rail 903 is provided with guide rail teeth 9031.

[0091] like Fig. 9 As shown, the displacement mechanism 10 comprises: a transmission rod 1002, a first displacement base 1001 and a second displacement base 1003 which are arranged opposite to each other and are detachably fixedly connected to each other. The first displacement base 1001 faces the side of the second displacement base 1003, and is provided with a first fan-shaped guide rail groove 10012 matching the fan-shaped guide rail 903 at the lower end, and a first transmission rod groove 10011 matching the transmission rod 1002 at the upper end. The bottom end of the first transmission rod groove 10011 is connected with the top end of the first fan-shaped guide rail groove 10012. The transmission rod 1002 is installed at the position of the first transmission rod groove 10011, and one end of the rod 10021 extends to the outside of the first displacement base 1001 and the second displacement base 1003, and is provided with a transmission rod rotation groove 10023 on the end surface. The fan-shaped guide rail 903 passes through the first fan-shaped guide rail groove 10012 and is gear-engaged with the transmission rod 1002.

[0092] The second displacement base 1003 is provided with a second transmission rod groove 10031 and a second fan-shaped guide rail groove 10032 at a position corresponding to the first displacement base 1001, and a chuck mounting rod mounting hole 10033 is provided on the outer wall. One end of the chuck mounting rod 11 is detachably fixedly connected to the chuck mounting rod mounting hole 10033. The Kirschner wire chuck 12 is mounted on the chuck mounting rod 11. Since the position of the fan-shaped guide rail 903 relative to the guide screw sleeve 3 is fixed when other mechanisms are not adjusted, when a screwdriver is inserted into the transmission rod rotation groove 10023 or other auxiliary tools are used to drive the transmission rod 1002 to rotate, the transmission rod 1002 can intelligently move toward or away from the guide screw sleeve 3 along its arc worm gear surface relative to the fan-shaped guide rail 903. At this time, the chuck mounting rod 11 fixed on the second displacement base 1003 and the Kirschner wire chuck 12 on the chuck mounting rod 11 will drive the Kirschner wire clamped by the Kirschner wire chuck 12 to deflect and displace along a fixed circle center. By adjusting the relative position of the Kirschner wire chuck 12 and the Kirschner wire, the circle center can be located on the axis of the broken bone, thereby driving the broken bone to deflect concentrically along the axis of the broken bone, which can significantly reduce the difficulty of adjusting the twisting direction of the cross sections of the two broken bones.

[0093] Example 6

[0094] Based on the single-arm multi-degree-of-freedom fracture reducer of Example 5, Figure 8 As shown, the end of the guide rail fixing mechanism 901 facing the fan-shaped guide rail 903 is provided with a mounting protrusion 9012, and the mounting protrusion 9012 is provided with a first positioning pin hole 9013 along the horizontal longitudinal direction. The end of the fan-shaped guide rail 903 facing the guide rail fixing mechanism 901 is provided with a mounting groove 9032 matching the mounting protrusion 9012, and a second positioning pin hole 9033 is provided on a side wall of the mounting groove 9032 at a position corresponding to the mounting hole 9013. The pin or screw 904 passes through the second positioning pin hole 9033 and the first positioning pin hole 9013 to fix the guide rail fixing mechanism 901 and the fan-shaped guide rail 903. This setting can form a detachable fixed connection between the guide rail fixing mechanism 901 and the fan-shaped guide rail 903. Since the fan-shaped guide rail 903 is a relatively wearable structure, this setting allows almost only the fan-shaped guide rail 903 to be stored and replaced when needed.

[0095] The end of the sector rail 903 away from the rail fixing mechanism 901 is provided with a limit pin hole 9034, and the limit pin 905 is plug-in fixedly connected or screwed to the limit pin hole 9034. This arrangement can effectively avoid the problem of the displacement mechanism 10 falling off from the sector rail 903 due to improper operation during operation.

[0096] Example 7

[0097] Based on the single-arm multi-degree-of-freedom fracture reducer of Example 5, Fig. 9 As shown, the first displacement base 1001 is provided with 2, 4 or 6 base assembly countersunk holes 10013 in the horizontal longitudinal direction, and the end of the base assembly countersunk hole 10013 facing away from the second displacement base 1003 is provided with a chamfered surface matching the base fixing screw 1004. The second displacement base 1003 is provided with a base assembly threaded hole at a corresponding position, and the base fixing screw 1004 passes through the base assembly countersunk hole 10013 and is fixed to the base assembly threaded hole. This arrangement can realize the rapid separation or fixation between the first displacement base 1001 and the second displacement base 1003.

[0098] The first displacement base 1001 is provided with two or three first base positioning pin blind holes 10014 in the horizontal longitudinal direction, and the second displacement base 1003 is provided with second base positioning pin blind holes at corresponding positions. The two ends of the base positioning pin are respectively inserted into the first base positioning pin blind hole 10014 and the second base positioning pin blind hole. This arrangement can assist in positioning the relative positions of the first displacement base 1001 and the second displacement base 1003 during the process of fixing and combining the first displacement base 1001 and the second displacement base 1003.

[0099] Example 8

[0100] Based on the single-arm multi-degree-of-freedom fracture reducer of Example 1, Fig.10 As shown, the rotating end of the fourth steering mechanism is horizontally arranged and fixedly connected to the fixed end of the fifth steering mechanism. The rotating end of the fifth steering mechanism is horizontally arranged and fixedly connected to the second connecting device.

[0101] like Figure 4 As shown, the first steering mechanism 4 includes: a rotating mechanism 17, and a first connecting hole 401 fixed on the rotating mechanism 17 and detachably fixedly connected to the lead screw 2. Figure 7 As shown, the third steering mechanism 7 includes: a rotating mechanism 17, and a second connecting hole 701 fixed on the rotating mechanism 17 and detachably fixedly connected to the guide screw sleeve 3. Fig.12 As shown, the second, fourth and fifth steering mechanisms include: a rotating mechanism 17, and a vertical base 1401 fixed on the rotating mechanism 17 and detachably fixedly connected to a corresponding device.

[0102] like Fig.11As shown, the first connecting device is a connecting rod mechanism, which includes: a connecting rod 16 and a chuck mounting rod 11. The connecting rod 16 includes: a rod head and a rod arm arranged in a horizontal and transverse direction. A third rotating mechanism mounting through hole 1601 matching the rotating end of the rotating mechanism 17 is provided at the axis of the rod arm. The rod head includes: a second chuck mounting rod through hole 1602 arranged in a horizontal and longitudinal direction, and a second chuck mounting rod fastening screw hole 1604 arranged at the top end in a vertical direction. The chuck mounting rod 11 passes through the second chuck mounting rod through hole 1602 and is pressed and fastened by a screw passing through the second chuck mounting rod fastening screw hole 1604. The Kirschner wire chuck 12 is installed on the chuck mounting rod 11. At this time, after fixing the rotating end of the rotating mechanism 17 to the third rotating mechanism mounting hole 1601, pass the chuck mounting rod 11 through the second chuck mounting rod hole 1602, and screw in the screw from the second chuck mounting rod fastening screw hole 1604 to press and tighten the chuck mounting rod 11, and then install the Kirschner wire chuck 12 on the chuck mounting rod 11.

[0103] like Fig.12 As shown, the second connection device is a sleeve rod mechanism, which includes: a T-type chuck mounting rod 15 and a mounting rod fastening screw 1503. The T-type chuck mounting rod 15 includes: a chuck mounting end 1051 and a rotating mechanism mounting hole 1502. The chuck mounting end 1501 is provided with a rotating mechanism mounting hole 1502 matching the rotating end of the rotating mechanism 17 at one end facing the fifth steering mechanism. The mounting rod fastening screw 1503 passes through the chuck mounting rod 1501 and is screwed and fixed to the rotating end of the rotating mechanism 17. The Kirschner wire chuck 12 is installed outside the chuck mounting rod 1501.

[0104] At this time, the sleeve rod mechanism is fixed to the rotating end of the fifth steering mechanism, and rotates clockwise or counterclockwise along the horizontal longitudinal axis under the drive of the fifth steering mechanism, thereby driving the Kirschner wire chuck 12 and the Kirschner wire fixed on the sleeve rod mechanism to rotate along the rotating axis of the sleeve rod mechanism. The structure of the device is relatively simple, and can realize the relative twisting operation of the broken bone along its axis, and the twisting axis is located at the axis of the sleeve rod mechanism.

[0105] According to an embodiment of the present invention, as required, the first connecting device and the second connecting device can both be one of an arc-shaped arm mechanism, a fan-shaped displacement mechanism, a connecting rod mechanism, and a sleeve rod mechanism, for example, the first connecting device and the second connecting device are both fan-shaped displacement mechanisms. They can also be any two different types of arc-shaped arm mechanisms, fan-shaped displacement mechanisms, connecting rod mechanisms, and sleeve rod mechanisms, for example, the first connecting device is a connecting rod mechanism, and the second connecting device is a fan-shaped displacement mechanism.

[0106] Example 9

[0107] Based on the above embodiments, Figure 4As shown, the rotating mechanism 17 comprises: a steering base 1701, a worm wheel 1702, and a worm 1705. The worm wheel 1702 and the worm 1705 are perpendicular to each other and are installed in the steering base 1701 in a gear-connected manner. The worm wheel shaft of the worm wheel 1702 extends to the outside of the steering base 1701 and is fixed to the fixed end of other devices. One end of the worm 1705 extends to the outside of the first steering base 1701, and a worm rotation groove 17052 is provided on the end surface.

[0108] The steering base 1701 is provided with a worm cavity 17012 and a worm wheel cavity 17015 which are perpendicular to each other and communicate with each other. The outer wall of the steering base 1701 is provided with a worm mounting hole 17014 at one end of the worm cavity 17012, and a worm shaft hole 17013 at the other end. The outer wall of the steering base 1701 is provided with a worm wheel mounting hole 17016 at one end of the worm wheel cavity 17015, and a worm wheel shaft through hole 17017 at the other end.

[0109] The worm wheel 1702 is installed in the worm wheel cavity 17015, and includes: a worm wheel shaft 17021, and a turbine tooth 17022 fixed on the worm wheel shaft 17021. The bottom of one end of the worm wheel shaft 17021 extending to the outside of the steering base 1701 is provided with an anti-slip installation groove 17023 along the axis, and the other end is a worm wheel shaft cover installation section 17024. The worm wheel shaft cover installation section 17024 is fixedly installed with a worm wheel shaft cover 1703. A worm wheel shaft cover retaining ring 1704 is sandwiched between the worm wheel shaft cover 1703 and the worm wheel installation hole 17016. The worm wheel shaft cover retaining ring 1704 is a circular arc circle with recovery ability, and its inner diameter is smaller than the aperture of the worm wheel installation hole 17016. The aperture of the worm gear mounting hole 17016 is smaller than the inner diameter of the worm gear cavity 17015 , and the aperture of the worm gear shaft through hole 17017 matches the outer diameter of the worm gear shaft 17021 .

[0110] The worm 1705 is installed in the worm cavity 17012, and includes: a worm shaft 17051, and an external thread 17052 fixed on the worm shaft 17051. The worm shaft 17051 extends to one end outside the steering base 1701, and is provided with a worm rotation groove 17053 on the end surface, and the other end is a worm shaft cover mounting section 17054. A worm shaft cover 1706 is fixedly mounted on the worm shaft cover mounting section 17054. A worm shaft cover retaining ring 1707 is sandwiched between the worm shaft cover 1706 and the worm mounting hole 17014. The worm shaft cover retaining ring 1707 is a circular arc ring with recovery ability, and its inner diameter is smaller than the aperture of the worm mounting hole 17014. The aperture of the worm mounting hole 17014 is smaller than the inner diameter of the worm cavity 17012 , and the aperture of the worm shaft hole 17013 matches the outer diameter of the worm shaft 17051 .

[0111] The use process of the device is as follows: first, the worm wheel 1702 and the worm 1705 are installed in the corresponding cavity of the steering base 1701. The installation method of the worm wheel 1702 is as follows: first, the end of the worm wheel shaft 17021 that needs to pass through the worm wheel shaft through hole 17017 is aligned with the worm wheel shaft through hole 17017, and then the worm wheel shaft 17021 is installed into the worm wheel cavity 17015 from the worm wheel mounting hole 17016, and the worm wheel shaft 17021 passes through the worm wheel shaft through hole 17017. Then, the worm wheel shaft cover retaining ring 1704 is bent and clamped between the worm wheel shaft cover 1703 and the worm wheel mounting hole 17016. Finally, the worm wheel shaft cover retaining ring 1704 is loosened to restore it to its original state and clamp it between the worm wheel shaft cover 1703 and the worm wheel mounting hole 17016. The installation method of the worm 1705 is the same as that of the worm wheel 1702. After installing the worm wheel 1702 and the worm 1705, it is only necessary to insert a screwdriver into the worm rotation groove 17053 or other auxiliary tools to drive the worm shaft 17051 to rotate, and then drive the external thread 17052 fixed to it to rotate, thereby driving the turbine teeth 17022 toothed with the external thread 17052 to rotate, the turbine teeth 17022 drive the worm wheel shaft 17021 fixed to it to rotate, and the worm wheel shaft 17021 drives other mechanisms fixedly connected to it to rotate, thereby realizing the rotation adjustment of the rotating end.

[0112] Example 10

[0113] Based on the single-arm multi-degree-of-freedom fracture reducer of Example 1, Figure 4 As shown, the worm shaft 17021 is provided with a worm fixing screw hole 17025 on the end surface of one end provided with the anti-slip mounting groove 17023. The device fixed to the worm shaft 17021 is provided with a worm shaft through hole matching the worm shaft 17021 at the corresponding position, and is sleeved on the outside of the worm shaft 17021. Figure 5 As shown, the first horizontal base 501 is provided with a first worm gear shaft through hole 502. Figure 8 As shown, the second horizontal base 801 is provided with a second worm gear shaft through hole 802. Fig.11 As shown, the third rotating mechanism mounting through hole 1601 is provided with a third worm gear shaft through hole. Fig.12 As shown, a third worm gear shaft through hole 1402 is provided on the vertical base 1401 .

[0114] like Figure 5 , 6 As shown in , 8, 11, and 12, the additional worm gear fixing screw 1708 passes through the corresponding worm gear shaft through hole and is screwed to the worm gear fixing screw hole 17025, and the diameter of the screw head is larger than the hole diameter of the worm gear shaft through hole of the fixing device. Fig.12 As shown, the chuck mounting end passes through the outer T-shaped rotating mechanism mounting hole 1502 and is fixed to the worm shaft through hole of the worm shaft 17021.

[0115] According to one embodiment of the present invention, the single-arm multi-degree-of-freedom fracture reducer further comprises: a Kirschner wire guide. The Kirschner wire guide comprises: a guide base 18, a guide handle 19, a sliding Kirschner wire guide rod 20, and a fixed Kirschner wire guide rod 21.

[0116] The guide base 18 comprises a slide groove 1801. One end of the slide groove 1801 is provided with a base blind hole 1802, and the other end is provided with a base threaded hole 1803. The guide handle 19 is fixedly and detachably installed with the base blind hole 1802, the sliding K-wire guide rod 20 is detachably and slidably fixedly installed with the slide groove 1801, and the fixed K-wire guide rod 21 is threadedly installed with the base threaded hole 1803.

[0117] The guide handle 19 comprises a hand-held handle portion 1901. A mounting plug 1902 is disposed at the bottom of the hand-held handle portion 1901. The mounting plug 1902 matches the base blind hole 1802.

[0118] The sliding K-wire guide rod 20 includes: a first K-wire sleeve 2001, a slider 2006, and a retaining ring 2007. A first K-wire through hole 2005 is provided at the middle axis of the first K-wire sleeve 2001. The portion of the first K-wire sleeve 2001 near the top is provided with an upper baffle 2002, a slider external thread 2003, and a sleeve retaining ring groove 2004 from top to bottom. The slider 2006 has an outer shape that matches the slide 1801, and an internal thread hole 20061 that matches the slider external thread 2003 is provided at the vertical middle axis. A lower baffle 20062 that matches the upper baffle 2002 is provided at the bottom end of the internal thread hole 20061. Both the upper baffle 2002 and the lower baffle 20062 are wider than the groove width of the slide 1801.

[0119] The fixed K-wire guide rod 21 comprises: a second K-wire sleeve 2101. A second K-wire through hole 2103 is provided at the middle axis of the second K-wire sleeve 2101. A sleeve thread 2102 matching the base thread hole 1803 is provided at a portion of the second K-wire sleeve 2101 near the top.

[0120] The use process of the device is as follows: first, remove the retaining spring 2007, and rotate the first Kirschner wire sleeve 2001 to separate the upper baffle 2002 and the lower baffle 20062 from the upper and lower end surfaces of the slide groove 1801. Then, according to the needs, slide the first Kirschner wire sleeve 2001 and the slider 2006 in the slide groove 1801 to the required position. Then, rotate the first Kirschner wire sleeve 2001 to make the upper baffle 2002 and the lower baffle 20062 close to the upper and lower end surfaces of the slide groove 1801, and insert the retaining spring 2007 so that the first Kirschner wire sleeve 2001 cannot slide relative to the slide groove 1801 under the action of friction. Finally, insert the Kirschner wire into the bone along the first Kirschner wire through hole 2005 of the first Kirschner wire sleeve 2001 and the second Kirschner wire through hole 2103 of the second Kirschner wire sleeve 2101. The device can provide necessary guidance for the Kirschner wire and stabilize the injection, thereby preventing the Kirschner wire from becoming loose or crooked, which would affect the subsequent orthopedic reduction operation using a reducer.

[0121] The present invention has at least one of the following advantages:

[0122] 1. The single-arm multi-degree-of-freedom fracture reducer of the present invention can realize the control of at least 5 degrees of freedom, and can well control the Kirschner wire to perform reduction movement, thereby driving the broken bone to perform reduction movement.

[0123] 2. The single-arm multi-degree-of-freedom fracture reducer of the present invention is relatively labor-saving in the process of controlling and moving each degree of freedom, which effectively saves the doctor's physical strength and further improves the accuracy and stability of broken bone reduction.

[0124] 3. The single-arm multi-degree-of-freedom fracture reducer of the present invention controls the movement of the Kirschner wire through a multi-degree-of-freedom control system to achieve controlled reduction of the broken bone. The operator can roughly know the relative orientation and position of the broken bone by observing the Kirschner wire, which greatly reduces the frequency of X-ray films during the reduction process.

[0125] It should be noted and understood that various modifications and improvements can be made to the invention described in detail above without departing from the spirit and scope of the claims of the present invention. Therefore, the scope of the claimed technical solution is not limited by any specific exemplary teaching given.

Claims

1. Single-arm multi-degree-of-freedom fracture reducer, characterized in that: include: A telescopic device that performs telescopic movement in the horizontal and longitudinal directions; One end of the telescopic device is fixedly connected to the fixed end of the first steering mechanism (4); the rotating end of the first steering mechanism is vertically arranged and fixedly connected to the fixed end of the second steering mechanism; the rotating end of the second steering mechanism is horizontally arranged and fixedly connected to the first connecting device; the first connecting device is equipped with a Kirschner wire chuck (12); The other end of the telescopic device is fixedly connected to the fixed end of the third steering mechanism (7); the rotating end of the third steering mechanism is vertically arranged and fixedly connected to the fixed end of the fourth steering mechanism; the rotating end of the fourth steering mechanism is horizontally arranged and fixedly connected to the second connecting device; the second connecting device is equipped with a Kirschner wire chuck (12); The first connecting device is an arc-shaped arm mechanism, which comprises: an arc-shaped arm (601) arranged in the vertical direction and a chuck mounting rod (11); the bottom end of the arc-shaped arm (601) is provided with a first fastening connection hole (6011) along the horizontal horizontal direction and matching the rotating end of the rotating mechanism (17); the top end of the arc-shaped arm (601) is provided with a first chuck mounting rod through hole (6012) along the horizontal longitudinal direction; the arc-shaped arm (601) is provided with a first chuck mounting rod fastening screw hole (6013) at the chuck mounting rod through hole (6012) and the hole axes are perpendicular to each other; the chuck mounting rod (11) passes through the first chuck mounting rod through hole (6012) and is pressed and fastened by a screw passing through the first chuck mounting rod fastening screw hole (6013); the Kirschner wire chuck (12) is installed on the chuck mounting rod (11); The second connecting device is a fan-shaped displacement mechanism, which comprises: a fan-shaped guide rail (9), a displacement mechanism (10) and a clamp mounting rod (11); The sector-shaped guide rail (9) comprises: a guide rail fixing mechanism (901) and a sector-shaped guide rail (903) fixed to each other; the guide rail fixing mechanism (901) is provided with a second fastening connection hole (9011) matching the rotating end of the rotating mechanism (17) along a horizontal lateral direction; and the outer circumferential surface of the sector-shaped guide rail (903) is provided with guide rail teeth (9031); The displacement mechanism (10) comprises: a transmission rod (1002), a first displacement base (1001) and a second displacement base (1003) which are arranged opposite to each other and are detachably fixedly connected to each other; the first displacement base (1001) is provided with a first fan-shaped guide rail groove (10012) matching the fan-shaped guide rail (903) at the lower end thereof, and a first displacement worm groove (10011) matching the transmission rod (1002) at the upper end thereof; The bottom end of the displacement worm groove (10011) is connected to the top end of the first fan-shaped guide rail groove (10012); the transmission rod (1002) is installed at the position of the first displacement worm groove (10011), one end of the rod extends to the first transmission rod groove (10011) and the outside of the second displacement base (1003), and a transmission rod transmission groove (10023) is provided on the end surface; the fan-shaped guide rail (903) passes through the first fan-shaped guide rail groove (10012) and is gear-connected with the transmission rod (1002); The second displacement base (1003) is provided with a second displacement worm groove (10031) and a second fan-shaped worm wheel groove (10032) at a position corresponding to the first displacement base (1001), and a chuck mounting rod mounting hole (10033) is provided on the outer wall; one end of the chuck mounting rod (11) is fixedly connected to the chuck mounting rod mounting hole (10033); and the Kirschner wire chuck (12) is mounted on the chuck mounting rod (11).

2. The single-arm multi-degree-of-freedom fracture reducer according to claim 1, characterized in that: The telescopic device comprises: a guide screw sleeve (3) and a guide screw (2); the guide screw (2) is inserted into the guide screw sleeve (3) and is controlled by a guide screw control device (1) to perform horizontal longitudinal movement along the guide screw sleeve (3).

3. The single-arm multi-degree-of-freedom fracture reducer according to claim 2, characterized in that: The guide screw control device (1) comprises: a device housing, a first bevel gear (103), and a second bevel gear (106); the device housing is fixed on the guide screw sleeve (3), and the guide screw (2) passes through the device housing and is inserted into the guide screw sleeve (3); the first bevel gear (103) is horizontally arranged in the device housing, and is sleeved on the outside of the guide screw (2) and is threadedly connected to the guide screw (2); the second bevel gear (106) is vertically arranged and is toothed with the first bevel gear (103), and the end of its gear shaft facing away from the bevel gear extends to the outside of the device housing.

4. The single-arm multi-degree-of-freedom fracture reducer according to claim 3, characterized in that: The housing of the device comprises: a bevel gear shaft sleeve (101), and a sleeve end cover (102), a guide cover plate (104), and a bevel gear shaft cover (107) which are respectively detachably fixedly connected to the bevel gear shaft sleeve (101); the sleeve end cover (102) is fixedly connected to the guide screw sleeve (3), and the guide cover plate (104) is slidably connected to the guide screw (2); The bevel gear sleeve (1013) is provided at one end of the bevel gear shaft sleeve (101) facing the sleeve end cover (102), a first bevel gear cavity (1011) is provided inside the end facing away from the sleeve end cover (102) along the horizontal longitudinal direction, and a second bevel gear cavity (1012) is provided at the top along the vertical direction, the first bevel gear cavity (1011) is communicated with the bevel gear sleeve (1013), and the second bevel gear cavity (1012) is communicated with the first bevel gear cavity (1011); The first bevel gear (103) comprises: a first wheel shaft (1035) arranged horizontally; an internal threaded through hole (1033) matching the guide screw (2) is provided at the center axis of the first wheel shaft (1035); a first bevel tooth (1031) is fixed to one end of the first wheel shaft (1035) close to the guide cover plate (104), and a first clamping groove (1034) is provided to one end of the first wheel shaft (1035) close to the sleeve end cover (102); the first bevel tooth (1031) is located in the first bevel gear cavity (1011), the first wheel shaft (1035) passes through the bevel gear sleeve (1013) and the first clamping groove (1034) extends to the outside of the bevel gear sleeve (1013), and is clamped with a first bevel gear retaining ring (110); The second bevel gear (106) comprises: a second axle (1064) arranged vertically; a second bevel tooth (1061) is fixed to one end of the second axle (1064) close to the first bevel gear (103), and a second clamping groove (1062) is arranged at one end close to the bevel gear shaft cover (107); the second bevel tooth (1061) is located in the second bevel gear cavity (1012) and is gear-engaged with the first bevel tooth (1031); a groove (1063) is arranged at one end of the second axle (1064) facing away from the second bevel tooth (1061), and passes through a through hole provided on the bevel gear shaft cover (107), so that the second clamping groove (1062) extends to the outside of the bevel gear shaft cover (107); and the second bevel gear retaining ring (108) is clamped into the second clamping groove (1062) located outside the bevel gear shaft cover (107); The sleeve end cover (102) is provided with a sleeve fixing cavity (1021) matching the bevel gear sleeve (1013) at one end facing the bevel gear shaft sleeve (101), and is provided with a fixing sleeve (1022) matching the shape of the outer wall of the guide screw sleeve (3) at one end facing the guide screw sleeve (3); the fixing sleeve (1022) is communicated with the sleeve fixing cavity (1021); The guide cover plate (104) is provided with a guide cover plate through hole (1041) along the horizontal longitudinal direction and matching with the guide screw rod (2).

5. The single-arm multi-degree-of-freedom fracture reducer according to claim 2, characterized in that: The vertical top end and the vertical bottom end of the two horizontal end surfaces of the guide screw sleeve (3) are both provided with positioning anti-rotation concave surfaces (302); the end of the guide screw sleeve (3) facing the guide screw (2) is provided with a through hole matching the guide screw (2); The guide screw (2) comprises: an external thread section (201), an installation and fixing section (202), and a limit block (204); the vertical top and vertical bottom of the external thread section (201) are both provided with an inner groove (203) along the horizontal longitudinal direction; the portion where the guide screw control device (1) is slidably connected to the guide screw (2) is provided with a protrusion matching the inner groove (203); the installation and fixing section (202) is fixedly connected to the first steering mechanism (4); The inner groove (203) is provided with a limiter installation groove (205) at one end close to the guide screw sleeve (3); a limiter (204) is installed in the limiter installation groove (205) via a spring (206); the top of the limiter (204) faces one end of the guide screw sleeve (3) and presents a downward inclined surface or a downward inclined arc surface; the guide screw sleeve (3) is provided with a limiter groove matching the limiter block (204) at one end close to the guide screw control device (1).

6. The single-arm multi-degree-of-freedom fracture reducer according to claim 1, characterized in that: The first steering mechanism (4) comprises: a rotating mechanism (17), a first connecting hole (401) fixed on the rotating mechanism (17) and fixedly connected to the guide screw (2); the second steering mechanism comprises: a rotating mechanism (17), a first horizontal base (501) fixed horizontally on the rotating mechanism (17) and detachably fixedly connected to the first steering mechanism (4); the third steering mechanism (7) comprises: a rotating mechanism (17), a second connecting hole (701) fixed on the rotating mechanism (17) and fixedly connected to the guide screw sleeve (3); the fourth steering mechanism comprises: a rotating mechanism (17), a second horizontal base (801) fixed horizontally on the rotating mechanism (17) and detachably fixedly connected to the third steering mechanism (7).

7. The single-arm multi-degree-of-freedom fracture reducer according to claim 1, characterized in that: The end of the guide rail fixing mechanism (901) facing the sector-shaped guide rail (903) is provided with a mounting protrusion (9012), and the mounting protrusion (9012) is provided with a first positioning pin hole (9013) along the horizontal longitudinal direction; the end of the sector-shaped guide rail (903) facing the guide rail fixing mechanism (901) is provided with a mounting groove (9032) matching the mounting protrusion (9012), and a side wall of the mounting groove (9032) is provided at a position corresponding to the mounting hole (9013). 13) A second positioning pin hole (9033) is provided at a corresponding position; a pin or a screw (904) passes through the second positioning pin hole (9033) and the first positioning pin hole (9013) to fix the guide rail fixing mechanism (901) and the fan-shaped guide rail (903); a limit pin hole (9034) is provided at one end of the fan-shaped guide rail (903) away from the guide rail fixing mechanism (901), and the limit pin (905) is fixedly connected to the limit pin hole (9034) by plug-in or screw connection; The first transmission rod groove (10011) is provided with more than two base assembly countersunk holes (10013) in the horizontal longitudinal direction; the second displacement base (1003) is provided with base assembly threaded holes at corresponding positions, and the base fixing screws (1004) pass through the base assembly countersunk holes (10013) and are fixed to the base assembly threaded holes; The first transmission rod groove (10011) is provided with more than two first base positioning pin blind holes (10014) along the horizontal longitudinal direction, and the second displacement base (1003) is provided with a second base positioning pin blind hole at the corresponding position; the two ends of the base positioning pin are respectively inserted into the first base positioning pin blind hole (10014) and the second base positioning pin blind hole.

8. The single-arm multi-degree-of-freedom fracture reducer according to claim 1, characterized in that: The rotating end of the fourth steering mechanism is horizontally arranged and fixedly connected to the fixed end of the fifth steering mechanism; the rotating end of the fifth steering mechanism is horizontally arranged and fixedly connected to the second connecting device; The first steering mechanism (4) comprises: a rotating mechanism (17), a first connecting hole (401) fixed on the rotating mechanism (17) and fixedly connected to the guide screw (2); the third steering mechanism (7) comprises: a rotating mechanism (17), a second connecting hole (701) fixed on the rotating mechanism (17) and fixedly connected to the guide screw sleeve (3); the second, fourth and fifth steering mechanisms comprise: a rotating mechanism (17), a vertical base (1401) fixed on the rotating mechanism (17) and detachably fixedly connected to the corresponding device.

9. The single-arm multi-degree-of-freedom fracture reducer according to any one of claims 6 or 8, characterized in that: The rotating mechanism (17) comprises: a steering base (1701), a worm wheel (1702), and a worm (1705); the worm wheel (1702) and the worm (1705) are perpendicular to each other and are installed in the steering base (1701) in a toothed manner; the worm wheel shaft of the worm wheel (1702) extends to the outside of the steering base (1701) and is fixed to the fixed end of other devices; one end of the worm (1705) extends to the outside of the steering base (1701), and a worm rotation groove (17053) is provided on the end surface.

10. The single-arm multi-degree-of-freedom fracture reducer according to claim 9, characterized in that: A worm cavity (17012) and a worm wheel cavity (17015) are provided in the steering base (1701) in a mutually perpendicular and mutually connected manner; a worm mounting hole (17014) is provided at one end of the worm cavity (17012) and a worm shaft hole (17013) is provided at the other end of the outer wall of the steering base (1701); a worm wheel mounting hole (17016) is provided at one end of the worm wheel cavity (17015) and a worm wheel shaft hole (17017) is provided at the other end of the outer wall of the steering base (1701); The worm wheel (1702) is installed in the worm wheel cavity (17015), and comprises: a worm wheel shaft (17021), and turbine teeth (17022) fixed on the worm wheel shaft (17021); the bottom of one end of the worm wheel shaft (17021) extending to the outside of the steering base (1701) is provided with an anti-slip installation groove (17023) along the axis, and the other end is a worm wheel shaft cover installation section (17024); a worm wheel shaft cover (1703) is fixedly installed on the worm wheel shaft cover installation section (17024); a worm wheel shaft cover retaining ring (1704) is sandwiched between the worm wheel shaft cover (1703) and the worm wheel installation hole (17016); The worm (1705) is installed in the worm cavity (17012), and comprises: a worm shaft (17051), and an external thread (17052) fixed on the worm shaft (17051); one end of the worm shaft (17051) extends to the outside of the steering base (1701), and a worm rotation groove (17053) is provided on the end surface, and the other end is a worm shaft cover mounting section (17054); a worm shaft cover (1706) is fixedly installed on the worm shaft cover mounting section (17054); a worm shaft cover retaining ring (1707) is sandwiched between the worm shaft cover (1706) and the worm mounting hole (17014).

11. The single-arm multi-degree-of-freedom fracture reducer according to claim 1, characterized in that: The single-arm multi-degree-of-freedom fracture reducer further comprises: a Kirschner wire guide; the Kirschner wire guide comprises: a guide base (18), a guide handle (19), a sliding Kirschner wire guide rod (20), and a fixed Kirschner wire guide rod (21); The guide base (18) comprises: a slide groove (1801); a base blind hole (1802) is provided at one end of the slide groove (1801), and a base threaded hole (1803) is provided at the other end; the guide handle (19) is fixedly and detachably mounted on the base blind hole (1802), the sliding Kirschner wire guide rod (20) is detachably and slidably fixedly mounted on the slide groove (1801), and the fixed Kirschner wire guide rod (21) is threadedly mounted on the base threaded hole (1803); The guide handle (19) comprises: a hand-held handle portion (1901); a mounting plug (1902) is provided at the bottom end of the hand-held handle portion (1901); the mounting plug (1902) matches the base blind hole (1802); The sliding Kirschner wire guide rod (20) comprises: a first Kirschner wire sleeve (2001), a slider (2006), and a retaining spring (2007); a first Kirschner wire through hole (2005) is provided at the central axis of the first Kirschner wire sleeve (2001); The portion of the first Kirschner wire sleeve (2001) close to the top is provided with an upper baffle (2002), a slider external thread (2003), and a sleeve retaining ring groove (2004) in order from top to bottom; the slider (2006) has an outer shape that matches the slide groove (1801), and an internal thread hole (20061) that matches the slider external thread (2003) is provided at the vertical center axis; A lower baffle (20062) matching the upper baffle (2002) is provided at the bottom end of the internal threaded hole (20061); The upper baffle (2002) and the lower baffle (20062) are both wider than the width of the slide groove (1801); The fixed Kirschner wire guide rod (21) comprises: a second Kirschner wire sleeve (2101); a second Kirschner wire through hole (2103) is provided at the central axis of the second Kirschner wire sleeve (2101); and a sleeve thread (2102) matching the base thread hole (1803) is provided at a portion of the second Kirschner wire sleeve (2101) close to the top.

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