External skeletal fixation device

Abstract

The invention relates to an external skeletal fixation device. The external skeletal fixation device comprises: a base; the first fixing piece is used for being fixed to one of the near-end bone and the far-end bone, the first fixing piece is movably connected to one end, in the first direction, of the base so that the first fixing piece can rotate around the second direction and the third direction relative to the base, the first direction is the arrangement direction of the near-end bone and the far-end bone, and the third direction is the arrangement direction of the far-end bone and the near-end bone. Any two of the first direction, the second direction and the third direction are vertical; the fixing assembly is used for being fixed to the other one of the near-end bone and the far-end bone, and the fixing assembly is movably connected to the end, deviating from the first fixing piece in the first direction, of the base so that the fixing assembly can move in the second direction and the third direction relative to the base and can move in the first direction relative to the base and rotate around the first direction relative to the base. The external skeletal fixation device does not need to be repeatedly adjusted and is relatively simple to operate.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an external bone fixation device. Background Art

[0002] Usually, when a fracture or bone crack occurs, a dislocation will occur between the proximal bone and the distal bone (a fracture or bone crack occurs between the proximal bone and the distal bone). At present, when treating patients with fractures or bone cracks, the general method is to fix fixing pins on the proximal bone and the distal bone respectively, so that the fixing pins at both locations are connected to the external bone fixation device, and the relative positions of the two fixing pins are adjusted by the external bone fixation device so that the two can move and rotate relative to each other in the three directions of xyz (6 degrees of freedom), thereby pulling the proximal bone and the distal bone, so that the relative positions of the two can be restored to normal. However, in the related art, some external bone fixation devices are difficult to achieve a good reduction effect through a single adjustment when realizing the relative movement of the above-mentioned 6 degrees of freedom, and often require secondary or even multiple adjustments, which is more complicated to operate. Summary of the invention

[0003] Based on this, it is necessary to provide an external bone fixation device to solve the problem in the related art that secondary or even multiple adjustments are required, resulting in complicated operation.

[0004] An external bone fixation device, comprising:

[0005] Pedestal;

[0006] a first fixing member, the first fixing member being used to be fixed to one of the proximal bone and the distal bone, the first fixing member being movably connected to one end of the base along a first direction so that the first fixing member can rotate relative to the base around a second direction and a third direction, the first direction being the arrangement direction of the proximal bone and the distal bone, and any two of the first direction, the second direction and the third direction being perpendicular;

[0007] A fixing assembly for fixing to the other of the proximal bone and the distal bone, the fixing assembly being movably connected to one end of the base away from the first fixing member along the first direction, so that the fixing assembly can move relative to the base along the second direction and the third direction, and can move relative to the base along the first direction and rotate around the first direction.

[0008] In one embodiment, the first fixing member includes a connecting portion and a rod portion extending along the first direction, the connecting portion is connected to an end of the rod portion close to the base, the connecting portion is ball-jointed to the base, and the rod portion is used to connect to one of the proximal bone and the distal bone.

[0009] In one embodiment, the external bone fixation device includes a first locking member detachably connected to the base, and a recessed portion is provided at one end of the base close to the connecting portion. The connecting portion extends into the recessed portion and the two are spherically matched. When the first locking member and the base are not locked, the connecting portion can rotate in the recessed portion. When the first locking member and the base are locked, the first locking member abuts against the connecting portion to limit the rotation of the connecting portion.

[0010] In one of the embodiments, the outer surface of the connecting portion is provided with a first mesh mark that is crisscrossed, and the end of the base that is away from the fixing component is provided with a first pointer located outside the recessed portion.

[0011] In one embodiment, the fixing assembly includes an adjusting member and a second fixing member, the adjusting member being movably connected to one end of the base away from the first fixing member along the first direction so that the adjusting member can move relative to the base along the second direction and the third direction, the second fixing member is used to be fixed to the other of the proximal bone and the distal bone, and the second fixing member is movably connected to the adjusting member so that the second fixing member can move relative to the adjusting member along the first direction and rotate around the first direction.

[0012] In one embodiment, the external bone fixation device includes a second locking member having a locked state and an unlocked state, and the second fixing member extending along the first direction is inserted into the adjusting member; in the unlocked state, the second fixing member can move along the first direction and rotate around the first direction relative to the adjusting member; in the locked state, the second locking member passes through the adjusting member and abuts against the second fixing member.

[0013] In one embodiment, the outer peripheral surface of the second fixing member is provided with a criss-cross second mesh mark, and the end of the adjusting member away from the first fixing member is provided with a second pointer.

[0014] In one embodiment, the external bone fixation device includes a third locking member detachably connected to the base, and when the third locking member is locked with the base, the adjusting member is locked to limit the movement of the adjusting member relative to the base. When the third locking member is not locked with the base, the adjusting member can move relative to the base along the second direction and the third direction.

[0015] In one embodiment, a step hole is provided at one end of the base away from the first fixing member, and the step hole has a step surface. The adjusting member includes an adjusting ring and a boss protruding from the outer peripheral surface of the adjusting ring. The second fixing member passes through the adjusting ring. When the third locking member is locked with the base, the boss is locked between the third locking member and the step surface.

[0016] In one embodiment, a third pointer pointing to the second direction and a fourth pointer pointing to the third direction are provided on the end surface of the boss, and a plurality of second direction identification lines arranged at intervals along the second direction and a plurality of third direction identification lines arranged at intervals along the third direction are provided on the step surface, and the third pointer can be aligned with the second direction identification line, and the fourth pointer can be aligned with the third direction identification line.

[0017] In one embodiment, the first fixing member includes a first fixing pin for fixing to one of the proximal bone and the distal bone, and the fixing assembly includes a second fixing pin for fixing to the other of the proximal bone and the distal bone.

[0018] The above-mentioned external bone fixation device includes a base, a first fixing member and a fixing assembly. The connection with one of the proximal bone and the distal bone is achieved through the first fixing member, and the connection with the other of the proximal bone and the distal bone is achieved through the fixing assembly. The first fixing member is movably connected to one end of the base along the first direction so that the first fixing member can rotate relative to the base around the second direction and the third direction; the fixing assembly is movably connected to one end of the base away from the first fixing member along the first direction so that the fixing assembly can move relative to the base along the second direction and the third direction, and move relative to the base along the first direction and rotate around the first direction. In this way, the relative movement of the proximal bone and the distal bone in the first direction, the second direction and the third direction, and the relative rotation around the first direction, the second direction and the third direction can be achieved, that is, the relative movement of the two with 6 degrees of freedom is achieved. In this device, when the above-mentioned 6 degrees of freedom relative movement is required, it is only necessary to rotate the first fixing member relative to the base around the second direction and the third direction, and to move the fixing assembly relative to the base along the first direction and rotate around the first direction, and move relative to the base along the second direction and the third direction, so as to eliminate the position deviation of the proximal bone and the distal bone in the 6 directions, and restore the proximal bone and the distal bone to the normal position, without repeated adjustment, and the operation is relatively simple. In addition, in the above-mentioned adjustment process, the several adjustments are relatively independent, and the position in other directions will not be affected by one of the adjustments, so the adjustment accuracy is higher and the operation difficulty is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of an external bone fixation device in one embodiment of the present application.

[0020] Figure 2 It is an exploded view of some components of the external bone fixation device in one embodiment of the present application.

[0021] Figure 3 It is a cross-sectional view of an external bone fixation device in one embodiment of the present application.

[0022] Figure 4 It is a right side view of the base in one embodiment of the present application.

[0023] Figure 5 It is a front view of a base in one embodiment of the present application.

[0024] Figure 6 It is a left view of the base in one embodiment of the present application.

[0025] Figure 7 This is a front view of an adjusting member in one embodiment of the present application.

[0026] Figure 8 It is a left side view of the adjusting member in one embodiment of the present application.

[0027] Reference numerals:

[0028] 100, base; 110, recessed portion; 120, protruding portion; 130, first pointer; 140, stepped hole; 141, first hole portion; 142, second hole portion; 143, stepped surface; 1431, second direction identification line; 1432, third direction identification line; 200, first fixing member; 210, rod portion; 211, first clamping arm; 212, second clamping arm; 220, connecting portion; 221, first mesh identification; 3 00, adjusting member; 310, adjusting ring; 311, mounting hole; 312, second pointer; 320, boss; 321, third pointer; 322, fourth pointer; 400, second fixing member; 410, second mesh mark; 500, first fixing needle; 600, second fixing needle; 710, first locking member; 711, connecting arm; 712, supporting wall; 720, third locking member; 721, gripping portion; 722, extending portion. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0031] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, 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 intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0035] See also Figures 1 to 3 The bone external fixation device provided in one embodiment of the present application includes a base 100, a first fixing member 200 and a fixing assembly. The first fixing member 200 is used to be fixed to one of the proximal bone and the distal bone, and the fixing assembly is used to be fixed to the other of the proximal bone and the distal bone. The first fixing member 200 is movably connected to one end of the base 100 along a first direction so that the first fixing member 200 can rotate relative to the base 100 around a second direction and a third direction, the first direction being the arrangement direction of the proximal bone and the distal bone, and the first direction, the second direction and any two of the third direction are perpendicular. The fixing assembly is movably connected to one end of the base 100 away from the first fixing member 200 along the first direction so that the fixing assembly can move relative to the base 100 along the second direction and the third direction, and can move relative to the base 100 along the first direction and rotate around the first direction.

[0036] Specifically, the second direction is the radial direction of the proximal bone and the distal bone, that is, when in use, the device is installed on one side of the proximal bone and the distal bone along the second direction.

[0037] The above-mentioned external bone fixation device is connected to one of the proximal bone and the distal bone through the first fixing member 200, and is connected to the other of the proximal bone and the distal bone through the second fixing member 400. The first fixing member 200 is movably connected to one end of the base 100 along the first direction, so that the first fixing member 200 can rotate relative to the base 100 around the second direction and the third direction; the fixing assembly is movably connected to one end of the base 100 away from the first fixing member 200 along the first direction, so that the fixing assembly can move relative to the base 100 along the second direction and the third direction, and move relative to the base 100 along the first direction and rotate around the first direction. In this way, the relative movement of the proximal bone and the distal bone in the first direction, the second direction and the third direction, and the relative rotation around the first direction, the second direction and the third direction can be realized, that is, the relative movement of the two with 6 degrees of freedom is realized. In this device, when the above-mentioned relative movement of six degrees of freedom is required, it is only necessary to rotate the first fixing member 200 relative to the base 100 around the second direction and the third direction, and to move the fixing assembly relative to the base 100 along the first direction and rotate around the first direction, and move relative to the base 100 along the second direction and the third direction, so as to eliminate the position deviation of the proximal bone and the distal bone in six directions, and restore the proximal bone and the distal bone to their normal positions without repeated adjustments, and the operation is relatively simple. In addition, in the above-mentioned adjustment process, the adjustment of the movement in several directions is relatively independent, and the position in other directions will not be affected by the adjustment in one place, so the adjustment accuracy is higher and the operation difficulty is lower.

[0038] See also Figures 1 to 3 In some embodiments, the fixing assembly includes an adjusting member 300 and a second fixing member 400. The adjusting member 300 is movably connected to an end of the base 100 away from the first fixing member 200 along the first direction, so that the adjusting member 300 can move along the second direction and the third direction relative to the base 100. The second fixing member 400 is used to be fixed to the other of the proximal bone and the distal bone, and the second fixing member 400 is movably connected to the adjusting member 300, so that the second fixing member 400 can move along the first direction and rotate around the first direction relative to the adjusting member 300.

[0039] In the above embodiment, when the relative movement of the proximal bone and the distal bone with six degrees of freedom is required, it is only necessary to rotate the first fixing member 200 relative to the base 100 around the second direction and the third direction, and to move and rotate the second fixing member 400 relative to the adjusting member 300 along the first direction and around the first direction, and to move the adjusting member 300 along the second direction and the third direction relative to the base 100, so that the position deviation of the proximal bone and the distal bone in the six directions can be eliminated, and the proximal bone and the distal bone can be restored to the normal position without repeated adjustment, and the operation is relatively simple. In addition, in the above adjustment process, the adjustment of the movement in several directions is relatively independent, and the position in other directions will not be affected by the adjustment in one place, so the adjustment accuracy is higher and the operation difficulty is lower.

[0040] See also Figures 1 to 3 In some embodiments, the first fixing member 200 includes a connecting portion 220 and a rod portion 210 extending along a first direction, the connecting portion 220 is connected to one end of the rod portion 210 close to the base 100, the connecting portion 220 is ball-jointedly connected to the base 100, and the rod portion 210 is used to connect to one of the proximal bone and the distal bone.

[0041] The connection part 220 is connected to the base 100 by a ball joint. Therefore, the connection part 220 can rotate 360 ​​degrees relative to the base 100, and naturally can realize the aforementioned rotation around the second direction and the third direction.

[0042] In some embodiments, the connecting portion 220 and the rod portion 210 may be connected as one piece by integral molding; or, in some embodiments, the two may be manufactured separately and then fixed together by means of clamping, bonding, etc.

[0043] See also Figures 3 to 5 In some embodiments, the external bone fixation device includes a first locking member 710 detachably connected to the base 100, and a recessed portion 110 is provided at one end of the base 100 close to the connecting portion 220. The connecting portion 220 extends into the recessed portion 110 and the contact area between the two is spherically matched. When the first locking member 710 and the base 100 are not locked, the connecting portion 220 can rotate in the recessed portion 110. When the first locking member 710 and the base 100 are locked, the first locking member 710 abuts against the connecting portion 220 to limit the rotation of the connecting portion 220.

[0044] In the embodiment shown in the drawings, the recessed portion 110 is a spherical recessed portion, and the outer surface of the connecting portion 220 is spherical, and the shapes and sizes of the two are matched, so that when the first locking member 710 is separated from the base 100, the connecting portion 220 can be inserted into the recessed portion 110 and can be completely fitted with the wall surface of the recessed portion 110, and can be flexibly rotated in the recessed portion 110. In this way, the ball joint connection between the connecting portion 220 and the base 100 can be achieved.

[0045] The first locking member 710 and the base 100 are detachably mounted by means of a threaded connection. Specifically, the first locking member 710 is annular, and is sleeved on the end of the base 100 near the connecting portion 220. The two are threadedly connected to tighten the connecting portion 220 and limit the rotation of the connecting portion 220. Further, the first locking member 710 includes a connecting arm 711 and a supporting wall 712, both of which are annular. The supporting wall 712 is connected to the outer end of the connecting arm 711. The connecting arm 711 extends along the axial direction of the base 100, and the supporting wall 712 extends along the radial direction of the base 100. The base 100 includes a protrusion 120 near one end of the connecting portion 220. The connecting arm 711 is sleeved on the protrusion 120, and the two are threadedly connected. The outer peripheral surface of the connecting arm 711 is provided with a serrated protrusion for the user to hold and rotate. As the connecting arm 711 is gradually tightened, the inner side wall of the supporting wall 712 will gradually press against the surface of the connecting portion 220 , thereby pressing the connecting portion 220 against the wall surface of the recessed portion 110 and restricting its rotation in the recessed portion 110 .

[0046] In other embodiments, the first locking member 710 and the base 100 may also be detachably mounted by means of snap connection or the like.

[0047] In other embodiments, a spherical component may be provided on the base 100, and a spherical pit may be provided on the connecting portion 220, and the spherical component may extend into the spherical pit to achieve a ball joint connection.

[0048] See also Figure 1 , Figure 2 and Figure 4 In some embodiments, the outer surface of the connecting portion 220 is provided with a criss-cross first mesh mark 221, and the end of the base 100 away from the fixing component is provided with a first pointer 130 located outside the recessed portion 110.

[0049] Specifically, the first pointer 130 is disposed on the end surface of the protruding portion 120 and points to the connecting portion 220. The first mesh mark 221 includes a plurality of first-class mark lines arranged at intervals and around the first direction, and a plurality of second-class mark lines arranged at intervals and around the second direction, and the two types of mark lines intersect each other to form a mesh similar to longitude and latitude lines. It can be understood that when the first fixing member 200 rotates relative to the base 100 around the second direction, the first-class mark lines aligned with the first pointer 130 will be different, and when the first fixing member 200 rotates relative to the base 100 around the third direction, the second-class mark lines aligned with the first pointer 130 will be different. Therefore, when the connecting portion 220 is rotated, by judging the position of the first pointer 130 aligned with the first mesh mark 221, the angle of rotation can be obtained. In this way, the rotation of the connecting portion 220 around the second direction and the third direction can be conveniently and accurately controlled.

[0050] Preferably, the first locking member 710 is made of a transparent material and is transparent as a whole, so that the angle of rotation of the connecting portion 220 can be easily observed. When the position of the connecting portion 220 needs to be adjusted, the first locking member 710 only needs to be loosened, and then the connecting portion 220 is rotated in the required rotation direction and rotation angle, and the position of the first pointer 130 pointing to the first mesh mark 221 is observed through the first locking member 710. When it is observed that the rotation is in place, the first locking member 710 can be tightened.

[0051] See also Figure 3 and Figure 7 In some embodiments, the external fixation device includes a second locking member having a locked state and an unlocked state, and the second fixing member 400 extending along the first direction is inserted into the adjusting member 300; in the unlocked state, the second fixing member 400 can move along the first direction and rotate around the first direction relative to the adjusting member 300; in the locked state, the second locking member passes through the adjusting member 300 and abuts against the second fixing member 400.

[0052] Specifically, the adjusting member 300 includes an adjusting ring 310 in an annular shape, and the second fixing member 400 is in a cylindrical rod shape. The second fixing member 400 is inserted into the adjusting ring 310, and the outer peripheral surface of the second fixing member 400 contacts the inner peripheral surface of the adjusting ring 310. When the second locking member is in an unlocked state, the second fixing member 400 can move along the first direction and rotate around the first direction in the adjusting ring 310. The adjusting ring 310 is provided with a mounting hole 311 that penetrates along its radial direction. The mounting hole 311 is a threaded hole. The second locking member is a screw. In the locked state, the second locking member is screwed into the mounting hole 311 and abuts against the outer peripheral surface of the second fixing member 400, thereby limiting the relative movement of the second fixing member 400 and the adjusting ring 310.

[0053] Preferably, the second fixing member 400 passes through the adjustment ring 310, that is, the end surface of the second fixing member 400 extends out of the adjustment ring 310. In this way, the contact area between the outer circumference of the second fixing member 400 and the inner circumference of the adjustment ring 310 can be larger, and the support for the second fixing member 400 is more stable.

[0054] See also Figure 3 , Figure 7 and Figure 8 In some embodiments, a crisscross second mesh mark 410 is disposed on the outer peripheral surface of the second fixing member 400 , and a second pointer 312 is disposed on the end of the adjusting member 300 away from the first fixing member 200 .

[0055] Specifically, the second pointer 312 is arranged on the end face of the adjustment ring 310 away from the first fixing member 200, and points to the second fixing member 400. The second mesh mark 410 includes a plurality of third-class mark lines arranged at intervals and extending along the first direction, and a plurality of fourth-class mark lines arranged at intervals and extending along the first direction, and the two types of mark lines intersect each other in a mesh shape. It can be understood that when the second fixing member 400 moves relative to the adjustment member 300 along the first direction, the third-class mark lines aligned with the second pointer 312 will be different, and when the second fixing member 400 rotates relative to the adjustment member 300 around the first direction, the fourth-class mark lines aligned with the second pointer 312 will be different. Therefore, when adjusting the position of the second fixing member 400, by judging the position of the second pointer 312 aligned with the second mesh mark 410, the angle turned and the distance moved can be obtained accordingly. In this way, the movement of the second fixing member 400 along the first direction and the rotation around the first direction can be conveniently and accurately controlled.

[0056] See also Figures 1 to 3 In some embodiments, the external bone fixation device includes a third locking member 720 detachably connected to the base 100. When the third locking member 720 is locked with the base 100, the adjusting member 300 is locked to limit the movement of the adjusting member 300 relative to the base 100. When the third locking member 720 is not locked with the base 100, the adjusting member 300 can move relative to the base 100 along the second direction and the third direction.

[0057] Specifically, the adjusting member 300 extends between the third locking member 720 and the base 100. When the third locking member 720 and the base 100 are locked, the two clamp the adjusting member 300, thereby inhibiting the movement of the adjusting member 300. When the position of the adjusting member 300 needs to be adjusted, the third locking member 720 and the base 100 only need to stop clamping the adjusting member 300. At this time, the adjusting member 300 can move along the second direction and the third direction.

[0058] See also Figure 3 , Figure 5 and Figure 7 In some embodiments, a step hole 140 is provided at one end of the base 100 away from the first fixing member 200, and the step hole 140 has a step surface 143. The adjusting member 300 includes an adjusting ring 310 and a boss 320 protruding from the outer peripheral surface of the adjusting ring 310. The second fixing member 400 is passed through the adjusting ring 310. When the third locking member 720 is locked with the base 100, the boss 320 is locked between the third locking member 720 and the step surface 143.

[0059] Specifically, the step hole 140 includes a first hole portion 141 and a second hole portion 142 that are interconnected, and the second hole portion 142 is located at an end of the first hole portion 141 away from the first fixing member 200. The diameter of the second hole portion 142 is larger than that of the first hole portion 141, so that a step surface 143 is formed between the two. The boss 320 is annular, which is sleeved on the outer peripheral surface of the adjustment ring 310, and the two are connected as a whole. The second fixing member 400 and the adjustment ring 310 both extend into the step hole 140. When the third locking member 720 is locked with the base 100, the boss 320 is clamped by the third locking member 720 and the step surface 143, thereby inhibiting the movement of the adjustment member 300.

[0060] In some embodiments, the third locking member 720 and the base 100 are detachably mounted by threaded connection. Specifically, the third locking member 720 is annular, extends into the second hole portion 142, and is threadedly connected to the hole wall of the second hole portion 142, thereby clamping the boss 320 with the step surface 143 to inhibit the adjustment member 300 from moving along the second direction and the third direction. When the third locking member 720 is loosened, the third locking member 720 and the step surface 143 no longer clamp the adjustment member 300.

[0061] Specifically, the third locking member 720 includes a gripping portion 721 and an insertion portion 722 connected to each other, the insertion portion 722 is inserted into the second hole portion 142 and is threadedly connected to the hole wall of the second hole portion 142, and the end wall of the insertion portion 722 and the step surface 143 clamp the boss 320. The gripping portion 721 is exposed, and a serrated protrusion is provided on its outer peripheral surface for the user to grip and rotate, and the insertion portion 722 can be screwed in and out by rotating the gripping portion 721.

[0062] In other embodiments, the third locking member 720 and the base 100 may also be detachably mounted by means of snap connection or the like.

[0063] See also Figure 3 , Figure 6 and Figure 8 In some embodiments, a third pointer 321 pointing to the second direction and a fourth pointer 322 pointing to the third direction are provided on the end surface of the boss 320, and a plurality of second direction marking lines 1431 arranged at intervals along the second direction and a plurality of third direction marking lines 1432 arranged at intervals along the third direction are provided on the step surface 143. The third pointer 321 can be aligned with the second direction marking line 1431, and the fourth pointer 322 can be aligned with the third direction marking line 1432.

[0064] Specifically, on the end surface of the boss 320 away from the first fixing member 200, a third pointer 321 is provided at one end along the second direction, and a fourth pointer 322 is provided at one end along the third direction. The third pointer 321 points to the second direction identification line 1431 outside the boss 320, and the fourth pointer 322 points to the third direction identification line 1432 outside the boss 320. When the adjusting member 300 moves along the second direction, the second direction identification line 1431 aligned with the third pointer 321 will be different, and when the adjusting member 300 moves along the third direction, the third direction identification line 1432 aligned with the fourth pointer 322 will be different. Therefore, when moving the adjusting member 300, by judging the position of the third pointer 321 aligned with the second direction identification line 1431, and the position of the fourth pointer 322 aligned with the third direction identification line 1432, the distance moved by the adjusting member 300 in the second direction and the third direction can be obtained accordingly. In this way, the movement of the adjusting member 300 in the second direction and the third direction can be conveniently and accurately controlled.

[0065] Preferably, the third locking member 720 is made of a transparent material and is transparent as a whole, so that the positions currently pointed to by the second pointer 312 , the third pointer 321 and the fourth pointer 322 can be easily observed.

[0066] See also Figures 1 to 3 In some embodiments, the first fixture 200 includes a first fixture pin 500 fixed to one of the proximal bone and the distal bone, and the fixture assembly includes a second fixture pin 600 for fixing to the other of the proximal bone and the distal bone.

[0067] Specifically, the first fixing pin 500 is fixed to the proximal bone, and the second fixing pin 600 is fixed to the distal bone. The first fixing pin 500 is connected to the rod 210 in the first fixing member 200, and the second fixing pin 600 is connected to the second fixing member 400 in the fixing assembly.

[0068] Preferably, the first fixing needle 500 is detachably connected to the rod portion 210 in the first fixing member 200, and the second fixing needle 600 is detachably connected to the second fixing member 400 in the fixing assembly.

[0069] In some embodiments, the rod portion 210 is in the shape of a cylindrical rod, and includes a first clamping arm 211 and a second clamping arm 212. The extension direction of the first fixing pin 500 is perpendicular to the first direction, and the first fixing pin 500 is clamped by the first clamping arm 211 and the second clamping arm 212 to achieve fixed installation of the first fixing pin 500. Further, the first clamping arm 211 and the second clamping arm 212 are both provided with a half hole, and the two half holes are connected to form a space for the first fixing pin 500 to pass through. The first clamping arm 211 and the second clamping arm 212 are locked by screws so that the two can hold the first fixing pin 500 tightly. Preferably, a plurality of first fixing pins 500 arranged at intervals are all fixed to the proximal bone, and these first fixing pins 500 are all fixed between the first clamping arm 211 and the second clamping arm 212 in the above manner.

[0070] In the embodiment shown in the drawings, the connection structure between the second fixing needle 600 and the second fixing member 400 is the same as the connection structure between the first fixing needle 500 and the rod 210 described above, and will not be described again here.

[0071] When the above-mentioned bone external fixation device is used, the first fixing pin 500 is first fixed to the proximal bone, and the second fixing pin 600 is fixed to the distal bone, and then a CT scan or X-ray is performed, and the current relative position difference between the first fixing pin 500 and the second fixing pin 600 is analyzed according to the obtained imaging data, and compared with the relative position difference when the first fixing pin 500 and the second fixing pin 600 are fixed on the normal bone, so that the amplitude required for relative adjustment of the first fixing pin 500 and the second fixing pin 600 in each direction can be obtained. Then, each locking member in the bone external fixation device is loosened, and the first fixing pin 500 is fixed to the rod 210, and the second fixing pin 600 is fixed to the second fixing member 400. Then, the relative position of the first fixing member 200 and the second fixing member 400 is adjusted according to the amplitude required for adjustment in each direction obtained above, and then the relative position of the first fixing pin 500 and the second fixing pin 600 is adjusted, and the proximal bone and the distal bone are pulled to eliminate the relative position difference between the two.

[0072] Specifically, when adjusting the relative position of the first fixing member 200 and the second fixing member 400, according to the method in the above-mentioned embodiment, the first fixing member 200 can be first rotated relative to the base 100 around the second direction and the third direction, and then the second fixing member 400 can be moved along the first direction and rotated around the first direction relative to the adjusting member 300, and then the adjusting member 300 can be moved along the second direction and the third direction relative to the base 100, so as to complete the position adjustment of 6 degrees of freedom. Alternatively, the second fixing member 400 can be first moved along the first direction and rotated around the first direction relative to the adjusting member 300, and then the adjusting member 300 can be moved along the second direction and the third direction relative to the base 100, and finally the first fixing member 200 can be rotated around the second direction and the third direction relative to the base 100.

[0073] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A bone external fixation device, characterized in that: The external bone fixation device comprises: Base (100); A first fixing member (200), the first fixing member (200) is used to be fixed to one of the proximal bone and the distal bone, the first fixing member (200) is movably connected to one end of the base (100) along a first direction, so that the first fixing member (200) can rotate relative to the base (100) around a second direction and a third direction, the first direction being the arrangement direction of the proximal bone and the distal bone, and the first direction, the second direction and the third direction are perpendicular to any two of them; A fixing assembly for fixing the other of the proximal bone and the distal bone, the fixing assembly being movably connected to one end of the base (100) away from the first fixing member (200) along the first direction, so that the fixing assembly can move relative to the base (100) along the second direction and the third direction, and can move relative to the base (100) along the first direction and rotate around the first direction.

2. The external bone fixation device according to claim 1, characterized in that: The first fixing member (200) comprises a connecting portion (220) and a rod portion (210) extending along the first direction, wherein the connecting portion (220) is connected to one end of the rod portion (210) close to the base (100), the connecting portion (220) is ball-jointedly connected to the base (100), and the rod portion (210) is used to be connected to one of the proximal bone and the distal bone.

3. The external bone fixation device according to claim 2, characterized in that: The external bone fixation device comprises a first locking member (710) detachably connected to the base (100); a recessed portion (110) is provided at one end of the base (100) close to the connecting portion (220); the connecting portion (220) extends into the recessed portion (110) and the two are spherically matched; when the first locking member (710) and the base (100) are not locked, the connecting portion (220) can rotate in the recessed portion (110); when the first locking member (710) and the base (100) are locked, the first locking member (710) abuts against the connecting portion (220) to limit the rotation of the connecting portion (220).

4. The external bone fixation device according to claim 3, characterized in that: The outer surface of the connecting portion (220) is provided with a first mesh mark (221) that is crisscrossed, and the end of the base (100) that is away from the fixing assembly is provided with a first pointer (130) located outside the recessed portion (110).

5. The bone external fixation device according to any one of claims 1 to 4, characterized in that: The fixing assembly comprises an adjusting member (300) and a second fixing member (400); the adjusting member (300) is movably connected to one end of the base (100) away from the first fixing member (200) along the first direction, so that the adjusting member (300) can move relative to the base (100) along the second direction and the third direction; the second fixing member (400) is used to be fixed to the other of the proximal bone and the distal bone, and the second fixing member (400) is movably connected to the adjusting member (300) so that the second fixing member (400) can move relative to the adjusting member (300) along the first direction and rotate around the first direction.

6. The external bone fixation device according to claim 5, characterized in that: The external bone fixation device comprises a second locking member having a locked state and an unlocked state, wherein the second fixing member (400) extending along the first direction is inserted into the adjusting member (300); in the unlocked state, the second fixing member (400) can move along the first direction and rotate around the first direction relative to the adjusting member (300); in the locked state, the second locking member passes through the adjusting member (300) and abuts against the second fixing member (400).

7. The external bone fixation device according to claim 6, characterized in that: The outer peripheral surface of the second fixing member (400) is provided with a crisscross second mesh mark (410), and the end of the adjusting member (300) facing away from the first fixing member (200) is provided with a second pointer (312).

8. The external bone fixation device according to claim 6, characterized in that: The external bone fixation device comprises a third locking member (720) detachably connected to the base (100); when the third locking member (720) is locked with the base (100), the adjusting member (300) is locked to limit the movement of the adjusting member (300) relative to the base (100); when the third locking member (720) is not locked with the base (100), the adjusting member (300) can move relative to the base (100) along the second direction and the third direction.

9. The external bone fixation device according to claim 8, characterized in that: A stepped hole (140) is provided at one end of the base (100) away from the first fixing member (200), and the stepped hole (140) has a stepped surface (143). The adjusting member (300) comprises an adjusting ring (310) and a boss (320) protruding from the outer peripheral surface of the adjusting ring (310). The second fixing member (400) is passed through the adjusting ring (310). When the third locking member (720) is locked with the base (100), the boss (320) is locked between the third locking member (720) and the stepped surface (143).

10. The external bone fixation device according to claim 9, characterized in that: A third pointer (321) pointing to the second direction and a fourth pointer (322) pointing to the third direction are provided on the end surface of the boss (320); a plurality of second direction identification lines (1431) arranged at intervals along the second direction and a plurality of third direction identification lines (1432) arranged at intervals along the third direction are provided on the step surface (143); the third pointer (321) can be aligned with the second direction identification line (1431), and the fourth pointer (322) can be aligned with the third direction identification line (1432).

11. The bone external fixation device according to any one of claims 1 to 4, characterized in that: The first fixing member (200) includes a first fixing pin (500) for fixing to one of the proximal bone and the distal bone, and the fixing assembly includes a second fixing pin (600) for fixing to the other of the proximal bone and the distal bone.

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