Orthopedic external fixation support easy to adjust

Abstract

The invention relates to the technical field of orthopedic instruments, in particular to an easy-to-adjust orthopedic external fixing support which comprises at least two fixing needles, the two fixing needles are fixedly connected to a fracture part respectively, the two ends of each fixing needle are connected with universal fixing clamps respectively, and the universal fixing clamps are connected through connecting parts. The connecting part comprises at least three connecting rods, a rigidity adjusting assembly is arranged on the connecting part, the rigidity adjusting assembly can change the distance between the connecting rods by rotating an adjusting disc, then the rigidity of the connecting part is adjusted, materials of the connecting part do not need to be replaced, it is avoided that in the replacing process, skeleton positioning is affected by position changes of fixing needles, and operation is easy, convenient and efficient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of orthopedic apparatus, in particular to an orthopedic external fixation support easy to adjust. BACKGROUND

[0002] The orthopedic external fixation support system is an apparatus used in orthopedic surgery, mainly used for fracture fixation, bone lengthening and bone defect repair, etc. It fixes two or more parts of the bone together through external fixation to promote the healing and recovery of the bone.

[0003] For example, Chinese patent CN102018557B discloses an orthopedic external fixation support with a threaded compression, which includes a connecting rod, a compression fixing needle and a fixed block assembly. The fixed block assembly includes an outer hexagonal connecting nut, a spiral spring, a connecting rod, an inner compression fixing needle fixed block, an outer compression fixing needle fixed block, a connecting rod fixing sleeve and a circular spring sheet. The connecting rod has a connecting rod body, and the connecting rod body has threaded rods at both ends. The connecting rod body has a circular arc groove one in the middle for clamping the connecting rod. The circular arc groove one side is provided with a mounting step, and the end of the mounting step is provided with a circular groove one for placing the circular spring sheet. The end of the mounting step is also provided with a plurality of tooth-shaped protrusions matched with the inner compression fixing needle fixed block. The connecting rod fixing sleeve is provided with a step hole, and the circular surface has a circular arc groove two matched with the connecting rod body middle circular arc groove one for clamping the connecting rod. The scheme drills the required hole on the bone surface by surgical tools, and the threaded segment of the compression fixing needle is screwed into the hole. The rear end of the threaded segment enters the bone at a slower speed than the front end of the threaded segment, thereby compressing the fracture surface when the threaded rear end enters the bone.

[0004] The orthopedic external fixation support in the prior art needs to adjust the rigidity of the support during use to speed up the recovery, but the fixed external support in the prior art usually uses a rod with fixed rigidity, which can only replace the support rod of different materials. Replacing the support rod of different materials increases the pain of the patient and affects the adjustment accuracy of the external fixation support. SUMMARY

[0005] Therefore, it is necessary to provide an orthopedic external fixation support easy to adjust in view of the problem that the orthopedic external fixation support in the prior art needs to replace the support rod of different materials when adjusting the rigidity, and the replacement process is complicated and easy to increase the pain of the patient.

[0006] The above-mentioned purpose is achieved by the following technical scheme: An orthopedic external fixation support easy to adjust, comprising: At least two fixing needles, one fixing needle passing through the proximal end of the fracture, and the other fixing needle passing through the root of the distal end of the fracture; The connecting part is provided with universal fixing clamps at both ends, which can connect the fixing needle and the connecting part. A rigidity adjusting assembly is arranged for adjusting the rigidity of the connecting part, which gradually weakens with the increase of time.

[0007] Further, the connecting part comprises at least three connecting rods, both ends of the three connecting rods are connected with the fixing needle through the universal fixing clamps respectively, and the three connecting rods can approach or move away from each other.

[0008] Further, the three connecting rods are made of titanium alloy.

[0009] Further, the rigidity adjusting assembly comprises a fixing cylinder and an adjusting disc, the fixing cylinder is fixedly arranged on the universal fixing clamp, at least three sliding grooves are arranged on the fixing cylinder, the three sliding grooves penetrate the upper and lower ends of the fixing cylinder, the three sliding grooves are uniformly distributed along the circumference of the fixing cylinder and extend along the radial direction of the fixing cylinder, the adjusting disc is rotationally arranged on the end face of the fixing cylinder, at least three adjusting grooves are arranged on the adjusting disc, the three adjusting grooves are arc-shaped, the three adjusting grooves are uniformly distributed along the circumference of the adjusting disc, the three adjusting grooves and the three sliding grooves are one-to-one corresponding, and the three connecting rods penetrate the three sliding grooves and the three adjusting grooves.

[0010] Further, a locking screw is arranged at the center of the adjusting disc, a threaded groove is arranged at the center of the fixing cylinder, first elastic strips are uniformly distributed in the circumferential direction of the center of the fixing cylinder, second elastic strips are uniformly distributed in the circumferential direction of the end face of the adjusting disc close to the center of the fixing cylinder, the first elastic strips and the second elastic strips are arranged alternately, and the first elastic strips and the second elastic strips are both elastic.

[0011] Further, a plurality of friction protrusions are arranged on the outer periphery of the adjusting disc.

[0012] Further, the universal fixing clamp comprises a rotating head, a first clamping block and a second clamping block, clamping grooves are arranged on the first clamping block and the second clamping block, the clamping grooves can accommodate the fixing needle, the rotating head is swing-connected to the end of the second clamping block away from the first clamping block, a connecting block is arranged on the end of the rotating head away from the second clamping block, the connecting block is swing-connected with the rotating head, and the connecting block is fixedly connected with the fixing cylinder.

[0013] Further, the end of the rotating head close to the second clamping block is coaxially and rotationally provided with a rotating disc, and a friction strip is arranged on the end of the rotating disc close to the second clamping block.

[0014] Further, a locking bolt is arranged in the connecting block, one end of the locking bolt is sequentially threaded through the rotating head, the rotating disc, the second clamping block and the first clamping block, and the side, away from the first clamping block, of the second clamping block is provided with a locking nut, which is threadedly connected with the locking bolt.

[0015] Further, two groups of adjusting nuts are arranged at the two ends of the connecting part.

[0016] The present application has the following advantages: The present application can adjust the distance between the connecting rods by rotating the adjusting disc, thereby adjusting the rigidity of the connecting part without changing the material of the connecting part, avoiding the change of the fixed needle position affecting the positioning of the bone during the replacement process, and being simple and efficient to operate.

[0017] The present application uses titanium alloy material for the connecting rod, which has high strength and modulus, can meet the mechanical requirements, and is light in weight, thereby reducing the burden on the patient's limbs and improving the comfort and convenience of movement.

[0018] The locking screw at the center of the adjusting disc cooperates with the threaded groove of the fixing cylinder, and the first and second elastic strips are arranged alternately on the fixing cylinder and the adjusting disc, so that vibration feedback is generated when the adjusting disc is rotated, the adjusting angle can be accurately controlled according to the feedback, the adjusting precision is enhanced, and the friction strips arranged between the components of the universal fixing clamp also help to improve the adjusting precision.

[0019] The present application uses the universal fixing clamp, the rotating head of which can swing and rotate, and the connecting block can be adjusted in multiple directions, so that the whole external fixation support can adapt to the fracture conditions of various angles, thereby expanding the application range.

[0020] The present application arranges the adjusting nuts at the two ends of the connecting rod, which can adjust the distance between the universal fixing clamps, facilitate the doctor to position the bone of the fracture site, and be flexible to operate. DETAILED DESCRIPTION

[0021] Figure 1 The structure diagram of the orthopedic external fixation support easy to adjust provided by an embodiment of the present application is shown; Figure 2 The partial exploded view of the orthopedic external fixation support easy to adjust provided by an embodiment of the present application is shown; Figure 3 The partial enlarged view of part A of the orthopedic external fixation support easy to adjust provided by an embodiment of the present application is shown; Figure 2 The partial enlarged view of part B of the orthopedic external fixation support easy to adjust provided by an embodiment of the present application is shown; Figure 4 Figure 2 The partial enlarged view of part B of the orthopedic external fixation support easy to adjust provided by an embodiment of the present application is shown; Figure 5 The partial enlarged view of part B of the orthopedic external fixation support easy to adjust provided by an embodiment of the present application is shown; Figure 2 ​Part C of the easy-to-adjust orthopedic external fixator provided in an embodiment is shown in a local enlarged view; Figure 6 For Figure 2 Part D of the easy-to-adjust orthopedic external fixator provided in an embodiment is shown in a local enlarged view; Figure 7 For Figure 2 Part E of the easy-to-adjust orthopedic external fixator provided in an embodiment is shown in a local enlarged view; Figure 8 Part structure of the easy-to-adjust orthopedic external fixator provided in an embodiment is shown in a sectional view; Figure 9 For Figure 8 Part F of the easy-to-adjust orthopedic external fixator provided in an embodiment is shown in a local enlarged view; Figure 10 Adjusting rigidity assembly of the easy-to-adjust orthopedic external fixator provided in an embodiment is shown in a sectional view; Figure 11 For Figure 10 Part G of the easy-to-adjust orthopedic external fixator provided in an embodiment is shown in a local enlarged view.

[0022] Wherein: 100, bone; 110, fixation needle; 120, connecting part; 130, connecting rod; 140, adjusting nut; 200, rigidity adjusting assembly; 210, fixing cylinder; 220, sliding through slot; 221, circular slot; 222, spiral slot; 230, first elastic strip; 240, adjusting disc; 241, adjusting through slot; 242, circular protrusion; 243, rotating ring slot; 250, second elastic strip; 260, friction protrusion; 270, locking screw; 271, rotating ring piece; 300, universal fixing clamp; 310, first clamping block; 311, clamping slot; 312, connecting slot; 320, second clamping block; 321, swinging slot; 322, first guide slot; 330, rotating disc; 331, first guide piece; 340, rotating head; 341, sliding slot; 342, second guide piece; 350, connecting block; 351, arc-shaped protrusion; 352, second guide slot; 353, spherical slot; 360, locking bolt; 361, hinged ball; 370, locking nut. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application by means of embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0024] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0025] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0026] Refer to the following Figures 1-11 The following describes an easily adjustable orthopedic external fixator provided by the present invention.

[0027] The application discloses an orthopedic external fixing support which is easy to adjust and is suitable for orthopedic correction surgery and comprises at least two fixing needles 110, one of which passes through a proximal end part of a fracture and the other of which passes through a root bone part of a distal end of the fracture, the two fixing needles 110 are parallel to each other, a connecting part 120 is arranged between the two fixing needles 110, the connecting part 120 is used for connecting the two fixing needles 110, universal fixing clamps 300 are arranged on two ends of the connecting part 120 respectively, the universal fixing clamps 300 can connect one end of the connecting part 120 and one end of the fixing needle 110 together, so as to fix a fracture part of a patient, a rigidity adjusting assembly 200 is arranged on the connecting part 120, the rigidity adjusting assembly 200 is used for adjusting rigidity of the connecting part 120, when the fixing needle 110 and the connecting part 120 are used for the first time, the fixing needle 110 and the connecting part 120 need to tightly fix the skeleton 100 of the patient, at this time, the connecting part 120 needs to have relatively strong rigidity, but as the skeleton 100 of the patient grows and heals, a certain activity space needs to be provided for the patient, at this time, the rigidity of the connecting part 120 needs to be weakened, the rigidity of the connecting part 120 in the prior art is generally adjusted by replacing the connecting part 120 made of other materials, but the position of the two fixing needles 110 may be changed in the replacement process, the positioning of the skeleton 100 of the patient may be affected after replacement, and the replacement process is relatively troublesome, usually needs to be operated by multiple doctors at the same time, and the replacement efficiency is relatively low.

[0028] Therefore, the application is provided with the rigidity adjusting assembly 200 on the connecting part 120, the rigidity adjusting assembly 200 can adjust the rigidity of the connecting part 120, and the rigidity of the connecting part 120 gradually decreases with the increase of time, specifically, the connecting part 120 in the application comprises at least three connecting rods 130, two ends of the three connecting rods 130 are connected with two ends of the fixing needle 110 through the universal fixing clamps 300 respectively, and the three connecting rods 130 can move away from or close to each other, when the three connecting rods 130 move away from each other, the three connecting rods 130 are farther away from the center, a force arm formed by the three connecting rods 130 is longer, the three connecting rods 130 can more effectively resist a torsional or bending moment caused by external force, so that the rigidity is improved, on the contrary, when the three connecting rods 130 move close to each other, the three connecting rods 130 are closer to the center, the force arm formed by the three connecting rods 130 is reduced and shortened, and the structure is more prone to deformation, so that the rigidity is reduced.

[0029] It should be noted that when the three connecting rods 130 move away from each other, triangular support points formed by the three connecting rods 130 on the universal fixing clamps 300 move away from each other, so that the support effect of the three connecting rods 130 is better, and the rigidity of the three connecting rods 130 as a whole is further improved; when the three connecting rods 130 move close to each other, the triangular support points formed by the three connecting rods 130 on the universal fixing clamps 300 move close to each other, so that the support performance of the three connecting rods 130 is reduced, and the rigidity of the three connecting rods 130 as a whole is reduced.

[0030] Specifically, the three connecting rods 130 in the embodiment are made of titanium alloy, which has the advantages of low density, high strength, good biocompatibility, corrosion resistance, and the like. In addition, the titanium alloy has a relatively light weight, which can reduce the burden on the patient's limbs and improve the comfort and activity convenience of the patient when wearing the external fixator compared with the metal connecting rods 130.

[0031] More specifically, as shown in Figure 4 and Figure 5 , the rigidity adjusting assembly 200 in the embodiment includes a fixing cylinder 210 and an adjusting disc 240. The fixing cylinder 210 is fixedly arranged on the universal fixing clamp 300. At least three sliding through-slots 220 are formed in the fixing cylinder 210, and the three sliding through-slots 220 extend through the upper and lower ends of the fixing cylinder 210 and are uniformly distributed along the circumference of the fixing cylinder 210. The adjusting disc 240 is rotatably arranged on the end face of the fixing cylinder 210. At least three adjusting through-slots 241 are formed in the adjusting disc 240, and the three adjusting through-slots 241 correspond to the three sliding through-slots 220 one by one. The three adjusting through-slots 241 are arc-shaped and are uniformly distributed along the circumference of the adjusting disc 240. In addition, the three connecting rods 130 simultaneously pass through the three sliding through-slots 220 and the three adjusting through-slots 241. When the adjusting disc 240 rotates, the three arc-shaped adjusting through-slots 241 on the adjusting disc 240 can push the three connecting rods 130 to move closer to or farther away from each other along the radial direction of the fixing cylinder 210 in the three sliding through-slots 220.

[0032] For example, as shown in Figure 7 , when the adjusting disc 240 is rotated in the reverse direction (clockwise direction as viewed from top to bottom in Figure 7 ), the arc-shaped adjusting through-slots 241 on the adjusting disc 240 push the three connecting rods 130 to move closer to each other. At this time, the overall rigidity of the three connecting rods 130 is reduced. When the adjusting disc 240 is rotated in the forward direction, the arc-shaped adjusting through-slots 241 on the adjusting disc 240 push the three connecting rods 130 to move farther away from each other. At this time, the overall rigidity of the three connecting rods 130 is enhanced.

[0033] In further embodiments, as shown in Figure 4 , Figure 5 and Figure 11As shown, in order to fix the positions among the three connecting rods 130, a locking screw 270 is arranged at the center of the adjusting disc 240, a spiral groove 222 is arranged at the center of the fixing cylinder 210, the locking screw 270 passes through the spiral groove 222 and is screwed in the spiral groove 222, a rotating ring groove 243 is arranged at the center of the adjusting disc 240, a rotating ring piece 271 is fixedly arranged on the locking screw 270 and is rotatably connected in the rotating ring groove 243, when the locking screw 270 rotates in the spiral groove 222, it can move along the axial direction of the fixing cylinder 210 to drive the adjusting disc 240 to move synchronously in the axial direction, thereby locking or releasing the connection between the adjusting disc 240 and the fixing cylinder 210.

[0034] It should be noted that the center of the fixing cylinder 210 is provided with a circular groove 221, the spiral groove 222 is arranged at the bottom of the circular groove 221, a plurality of first elastic strips 230 are uniformly distributed on the bottom of the circular groove 221, a circular protrusion 242 is arranged at the center of the adjusting disc 240 and close to one end of the fixing cylinder 210, a plurality of second elastic strips 250 are uniformly distributed on the end face of the circular protrusion 242 close to the fixing cylinder 210, when the adjusting disc 240 and the fixing cylinder 210 are rotatably connected, the circular protrusion 242 is located in the circular groove 221, at this time, the first elastic strips 230 and the second elastic strips 250 are arranged alternately, when the adjusting disc 240 rotates on the fixing cylinder 210 by a certain angle, the first elastic strips 230 and the second elastic strips 250 will rub against each other, the first elastic strips 230 and the second elastic strips 250 can increase the rotating resistance to a certain extent, so that the adjusting disc 240 can be positioned more stably and accurately during rotation, and the positional deviation caused by excessive rotation or loosening is avoided.

[0035] When it is necessary to adjust the distance among the three connecting rods 130, the patient or the doctor can rotate the locking screw 270 to make the adjusting disc 240 and the fixing cylinder 210 rotatable relative to each other, then the adjusting disc 240 can be rotated to drive the three connecting rods 130 to move close to or away from along the radial direction of the adjusting disc 240 to adjust the distance among the three connecting rods 130, the first elastic strips 230 and the second elastic strips 250 can increase the adjustment accuracy, the contact frequency of the first elastic strips 230 and the second elastic strips 250 is fixed when rotating by a certain angle each time, therefore, when adjusting other adjusting discs 240, the angle of adjustment can be determined according to the contact frequency of the first elastic strips 230 and the second elastic strips 250, it should be noted that when the patient or the doctor rotates the adjusting disc 240, the first elastic strips 230 and the second elastic strips 250 will contact to produce a vibration feedback, the patient or the doctor can obviously feel the vibration feedback, thereby improving the adjustment accuracy.

[0036] It can be understood that, since the first elastic strip 230 and the second elastic strip 250 are both elastic, when the patient or the doctor twists the locking screw 270 to rotate different numbers of turns, the vibration feedback intensity generated by the contact of the first elastic strip 230 and the second elastic strip 250 can be changed, when a stronger feedback intensity is needed, the patient or the doctor can twist the locking screw 270 to rotate a smaller number of turns, so that the first elastic strip 230 and the second elastic strip 250 are in contact and a larger deformation occurs, thereby generating a stronger vibration feedback, of course, at this time, the patient or the doctor needs to use a larger force to rotate the adjusting disc 240; when a weaker feedback intensity is needed, the patient or the doctor can twist the locking screw 270 to rotate a larger number of turns, so that the first elastic strip 230 and the second elastic strip 250 are in contact and a smaller deformation occurs, thereby generating a weaker vibration feedback, of course, at this time, only a smaller intensity is needed to rotate the adjusting disc 240.

[0037] Specifically, the adjusting disc 240 is rotated to make the three connecting rods 130 approach along the radial direction of the adjusting disc 240, thereby gradually weakening the overall rigidity of the three connecting rods 130, and after adjustment is completed, the locking screw 270 is twisted in the opposite direction to lock the adjusting disc 240 and the fixed cylinder 210, preventing relative rotation therebetween to affect the positions of the three connecting rods 130.

[0038] This structure design can effectively ensure the position fixation between the three connecting rods 130, and through the interaction of the first elastic strip 230 and the second elastic strip 250 and the close cooperation of the locking screw 270 and the spiral groove 222, the dual functions of flexible rotation adjustment and stable fixation between the adjusting disc 240 and the fixed cylinder 210 are realized, thereby providing a strong guarantee for the reliability and stability of the entire structure.

[0039] It should be noted that, as shown in Figure 1 , Figure 2 , Figure 10 and Figure 11 , the universal fixing clamp 300 of the present application has a total of four, two of which are located above and two of which are located below, and the rigidity adjusting assembly 200 is described as the adjusting disc 240 and the fixed cylinder 210 of the two universal fixing clamps 300 located below, as shown in Figure 7 , the adjusting disc 240 of the two universal fixing clamps 300 located above is located at the upper end surface of the fixed cylinder 210; as shown in Figure 11 , the adjusting disc 240 of the two universal fixing clamps 300 located above is located at the structure of the fixed cylinder 210, which is basically the same, except that the adjusting disc 240 of the two universal fixing clamps 300 located below is located at the lower end surface of the fixed cylinder 210, and the other structures are completely the same, which will not be described in detail here.

[0040] In further embodiments, in order to facilitate the rotation of the adjustment disc 240 by the patient or the doctor, a plurality of friction protrusions 260 are arranged on the outer periphery of the adjustment disc 240, which can increase the friction when the patient or the doctor contacts the adjustment disc 240, thereby facilitating the rotation of the adjustment disc 240 and preventing relative sliding.

[0041] The height of each friction protrusion 260 is controlled between 2-3 mm, which can ensure significant tactile feedback and will not cause compression or wear to the skin of the hand due to being too sharp, so that when the hand of the patient or the doctor contacts the adjustment disc 240, the friction can be greatly increased.

[0042] It can be understood that the friction protrusions 260 effectively increase the upper limit of static friction by increasing the roughness of the contact surface. Whether it is a patient in the postoperative rehabilitation stage with relatively weak hand strength or a doctor who needs to perform rapid and accurate operations in a complex medical environment, the close engagement relationship between the hand and the friction protrusions 260 when holding the adjustment disc 240 can effectively avoid the relative sliding phenomenon caused by factors such as hand sweating and uneven operation force.

[0043] Specifically, as shown in Figure 2 , Figure 3 and Figure 4 , the universal fixing clamp 300 in the embodiment includes a rotating head 340, a first clamping block 310 and a second clamping block 320, the first clamping block 310 and the second clamping block 320 are both provided with a clamping groove 311, which is semicylindrical, when the first clamping block 310 and the second clamping block 320 are connected together, the two clamping grooves 311 simultaneously clamp one end of the fixing needle 110, thereby fixing and connecting the fixing needle 110 on the first clamping block 310 and the second clamping block 320, the rotating head 340 is swingably connected to the end of the second clamping block 320 away from the first clamping block 310, the rotating head 340 can swing around the second clamping block 320 as the swing center to adjust the position of the rotating head 340, the end of the rotating head 340 away from the second clamping block 320 is provided with a connecting block 350, the connecting block 350 is swingably connected with the second clamping block 320, and the connecting block 350 is also fixedly connected with the fixing cylinder 210, the connecting block 350 has the function of multidirectional adjustment, since the fixing cylinder 210 is fixedly connected with the connecting block 350, the three connecting rods 130 on the fixing cylinder 210 can adapt to multidirectional adjustment, and the rotating head 340 in the embodiment can also rotate relative to the second clamping block 320, thereby making the adjustment of the connecting block 350 have another dimension, and further making the whole universal fixing clamp 300 block can be multidirectionally adjusted to adapt to bone fracture conditions at various angles, thereby greatly increasing the application range of the orthopedic external fixation support which is easy to adjust.

[0044] It should be noted that, asFigure 2 、 Figure 3 、 Figure 4 and Figure 9 As shown, a rotating disk 330 is rotatably provided on one end of the rotating head 340 close to the second clamping block 320 in this embodiment, and friction strips are evenly distributed circumferentially on one end of the rotating disk 330 close to the rotating head 340, and friction strips are also evenly distributed circumferentially on one end of the rotating head 340 close to the rotating disk 330. The function of the friction strips is the same as that of the aforementioned first elastic strip 230 and second elastic strip 250, which will not be described in detail here.

[0045] like Figure 2 and Figure 3 As shown, in order to enable the rotating head 340 to swing on the second clamping block 320, an arc-shaped raised swinging groove 321 is provided on one end of the second clamping block 320 close to the rotating disk 330, and circular holes are provided on the connecting block 350, the rotating head 340 and the rotating disk 330. A locking bolt 360 is passed through the circular hole. The locking bolt 360 is used to connect the first clamping block 310, the second clamping block 320, the rotating head 340 and the connecting block 350 together. An arc-shaped raised connecting groove 312 is provided on the first clamping block 310, and the connecting groove 312 has the same length as the swinging groove 321. One end of the locking bolt 360 passes through the first clamping block 310 in sequence. The connecting block 350, rotating head 340, rotating disk 330, second clamping block 320, and first clamping block 310 are threadedly connected with a locking nut 370. The locking nut 370 of the present invention is slidably disposed on the side of the arc-shaped raised connecting groove 312 of the first clamping block 310 away from the second clamping block 320. The outer periphery of the locking nut 370 is rectangular. The rectangular locking nut 370 can slide within the first clamping block 310 along the length of the arc-shaped raised connecting groove 312. The arrangement of the rectangular locking nut 370 prevents the locking nut 370 from rotating relative to the first clamping block 310 when the patient or doctor tightens the locking bolt 360. After the locking bolt 360 connects the connecting block 350, rotating head 340, rotating disk 330, second clamping block 320, and first clamping block 310, the rotating disk 330 on the rotating head 340 can swing along the length of the arc-shaped raised swinging groove 321.

[0046] A first guide groove 322 for guiding is provided on the arc-shaped raised swing groove 321, and a first guide piece 331 is provided on the rotating disk 330. The first guide piece 331 is slidably connected to the first guide groove 322 so that the rotating head 340 is guided to swing in the second clamping block 320 through the first guide groove 322 and the first guide piece 331.

[0047] It is to be explained that, in order to improve the accuracy of adjustment, the present application is provided with uniformly arranged friction strips on the outer side of the swing groove 321, i.e. the side of the swing groove 321 close to the rotating disc 330, and the rotating disc 330 is also provided with friction strips on the end surface close to the swing groove 321, which are circumferentially uniformly arranged. When the second clamping block 320 is connected with the rotating disc 330, the friction strips on the side of the swing groove 321 will be in contact with the friction strips on the end surface of the rotating disc 330 close to the second clamping block 320. The friction strips have the same effect as the first elastic strip 230 and the second elastic strip 250, and thus will not be described in detail here.

[0048] Specifically, as shown in Figure 4 and Figure 6 In order to make the connecting block 350 swing on the rotating head 340, the present embodiment is provided with an arc-shaped recessed sliding groove 341 on the end of the rotating head 340 close to the connecting block 350, and the sliding groove 341 is provided with a second guide piece 342 for guiding. The end of the connecting block 350 close to the rotating head 340 is provided with an arc-shaped protrusion 351 matched with the arc-shaped recessed sliding groove 341, and the arc-shaped protrusion 351 is provided with a second guide groove 352 matched with the second guide piece 342, so that the connecting block 350 can swing along the extension direction of the second guide groove 352. In order to facilitate the swinging of the two, the present application hollows the inside of the connecting block 350, and a spherical groove 353 is arranged at the circular hole away from the end of the arc-shaped protrusion 351, and a hinged ball 361 is arranged on the end of the locking bolt 360 away from the locking nut 370. The hinged ball 361 on the locking bolt 360 is ball-jointed in the spherical groove 353, so that the connecting block 350 can swing along the second guide groove 352 with the hinged ball 361 as the swing center.

[0049] It is to be explained that, in order to improve the accuracy, friction strips are arranged on the side of the arc-shaped recessed sliding groove 341 and the side of the arc-shaped protrusion 351.

[0050] In a further embodiment, the connecting rod 130 of the present application is provided with two groups of adjusting nuts 140 threadedly connected on both ends, each group of adjusting nuts 140 has two, and each group of adjusting nuts 140 is used for positioning the connecting rod 130 on the universal fixing clamp 300, and the adjusting nut 140 can adjust the distance between the two universal fixing clamps 300 connected by the connecting rod 130, so as to facilitate the doctor to position the fractured part of the bone 100.

[0051] The specific use process of the orthopedic external fixation support provided by the present application is described in combination with the above embodiments: Install the fixing needle 110: The doctor inserts one of the two fixation needles 110 through the proximal end of the fractured bone, and adjusts the length of the two fixation needles 110, and then inserts the other fixation needle 110 through the distal end of the fractured bone, and adjusts the length of the two fixation needles 110.

[0052] Install the universal fixing clamp 300: Install the four universal fixing clamps 300 on the two ends of the two fixation needles 110, and the four universal fixing clamps 300 are not clamped on the two ends of the two fixation needles 110, which is convenient for subsequent adjustment. Install the six connecting rods 130: Insert the six connecting rods 130 through the three sliding grooves 220 on the fixing cylinder 210 of the four universal fixing clamps 300 and the three adjusting grooves 241 on the adjusting disc 240 in sequence, and the adjusting nuts 140 of the six connecting rods 130 are not locked at this time, which is convenient for subsequent adjustment.

[0053] Adjust the universal fixing clamp 300: Adjust the four universal fixing clamps 300 to be parallel to each other, and the specific state is shown in Figure 1 and Figure 10 After adjustment, tighten the locking bolt 360.

[0054] Adjust the connecting rod 130: The doctor adjusts the adjusting nuts 140 on the six connecting rods 130 according to the fracture condition, so that the six connecting rods 130 pull the upper and lower two fixation needles 110 close to or away from each other to make the fractured bone 100 correspond, and the doctor loosens the locking bolt 360 on the fixing cylinder 210, at this time the adjusting disc 240 can rotate relative to the fixing cylinder 210, the doctor rotates the adjusting disc 240 in the positive direction, so that the three connecting rods 130 can be away from each other on the three adjusting grooves 241 on the adjusting disc 240 and the three sliding grooves 220 on the fixing cylinder 210, and the distance between the three connecting rods 130 is the farthest, at this time the overall stiffness of the three connecting rods 130 is the largest, so that the bone 100 can be better positioned, and after adjustment, the doctor tightens the locking bolt 360.

[0055] Subsequent adjustment: With the increase of the time that the patient uses the orthopedic external fixation support which is easy to adjust, the growth and healing of the patient's bone 100, the doctor needs to adjust the distance between the three connecting rods 130 regularly, when adjusting, the doctor loosens the locking bolt 360, reversely rotates the adjusting disc 240 to make the distance between the three connecting rods 130 close, when the distance between the three connecting rods 130 is close, the rigidity of the three connecting rods 130 as a whole is reduced, thereby being beneficial to the growth and healing of the patient's bone 100 in the later stage.

[0056] The technical features of the above embodiments can be combined in any manner, and to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0057] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the present application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An easily adjustable orthopedic external fixator, characterized in that: include: At least two fixation pins, one through the proximal part of the fracture and the other through the distal part of the radicular bone; A connecting portion, wherein both ends of the connecting portion are provided with universal fixing clamps, and the universal fixing clamps are capable of connecting the fixing pin and the connecting portion; A stiffness adjustment component is used to adjust the stiffness of the connection part, and the stiffness of the connection part gradually weakens with the increase of time.

2. The easily adjustable orthopedic external fixator according to claim 1, characterized in that: The connecting portion includes at least three connecting rods, both ends of which are connected to the fixing pins via universal fixing clamps, and the three connecting rods can move closer to or farther away from each other.

3. The easily adjustable orthopedic external fixator according to claim 2, characterized in that: The three connecting rods are all made of titanium alloy.

4. The easily adjustable orthopedic external fixator according to claim 2, characterized in that: The stiffness adjustment assembly includes a fixed cylinder and an adjusting disk, the fixed cylinder is fixedly arranged on the universal fixing clamp, at least three sliding slots are provided on the fixed cylinder, the three sliding slots all pass through the upper and lower ends of the fixed cylinder, the three sliding slots are evenly distributed along the circumference of the fixed cylinder and extend radially along the fixed cylinder, the adjusting disk is rotatably arranged on the end surface of the fixed cylinder, at least three adjusting slots are provided on the adjusting disk, the three adjusting slots are all arc-shaped, the three adjusting slots are evenly distributed along the circumference of the adjusting disk, the three adjusting slots and the three sliding slots correspond one to one, and the three connecting rods all pass through the three sliding slots and the three adjusting slots.

5. The easily adjustable orthopedic external fixator according to claim 4, characterized in that: A locking screw is provided at the center of the adjusting disk, a threaded groove is provided at the center of the fixing cylinder, a first elastic bar is evenly distributed circumferentially at the center of the fixing cylinder, and a second elastic bar is evenly distributed circumferentially on an end surface of the adjusting disk center close to the center of the fixing cylinder. The first elastic bar and the second elastic bar are staggered and both are elastic.

6. The easily adjustable orthopedic external fixator according to claim 2, characterized in that: A plurality of friction protrusions are arranged on the outer circumference of the adjusting disk.

7. The easily adjustable orthopedic external fixator according to claim 2, characterized in that: The universal fixing clamp includes a rotating head, a first clamping block and a second clamping block. The first clamping block and the second clamping block are both provided with a clamping groove, and the clamping groove can accommodate a fixing needle. The rotating head is swingably connected to the end of the second clamping block away from the first clamping block. A connecting block is provided on the end of the rotating head away from the second clamping block. The connecting block is swingably connected to the rotating head, and the connecting block is fixedly connected to the fixing cylinder.

8. The easily adjustable orthopedic external fixator according to claim 7, characterized in that: A rotating disk is coaxially and rotatably provided on one end of the rotating head close to the second clamping block, and a friction strip is provided on one end of the rotating disk close to the second clamping block.

9. The easily adjustable orthopedic external fixator according to claim 8, characterized in that: A locking bolt is provided in the ball joint of the connecting block, and the other end of the locking bolt passes through the rotating head, the rotating disk, the second clamping block and the first clamping block in sequence. A locking nut is provided on the side of the second clamping block away from the first clamping block, and the locking nut is threadedly connected to the locking bolt.

10. The easily adjustable orthopedic external fixator according to claim 1, characterized in that: Two sets of adjusting nuts are provided at both ends of the connecting portion.

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