External bone fixation device

Abstract

The application relates to an external bone fixation device. The external bone fixation device comprises a base, a first fixing member for fixing one of a proximal bone and a 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 along 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; and a fixing assembly for fixing the other of the proximal bone and the distal bone, the fixing assembly being movably connected to the end of the base along the first direction away from the first fixing member, so that the fixing assembly can move relative to the base along the second direction and the third direction, and can move and rotate relative to the base along and around the first direction. The external bone fixation device does not need to be repeatedly adjusted, and the operation is relatively simple.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to external fixation devices for bones. Background Technology

[0002] Typically, when a fracture or crack occurs, misalignment occurs between the proximal and distal bones (where the fracture or crack occurs between the proximal and distal bones). Currently, the common approach to treating fractures or cracks involves fixing pins to both the proximal and distal bones, connecting both pins to an external fixation device. The external fixation device is then used to adjust the relative positions of the pins, allowing them to move and rotate relative to each other in the x, y, and z directions (6 degrees of freedom), thereby pulling the proximal and distal bones back to their normal position. However, some external fixation devices, when achieving the aforementioned 6 degrees of freedom of relative movement, often fail to achieve satisfactory reduction with a single adjustment, frequently requiring secondary or even multiple adjustments, making the procedure quite complex. Summary of the Invention

[0003] Therefore, it is necessary to provide an external fixation device to solve the problem that the related technologies require secondary or even multiple adjustments, which leads to complicated operation.

[0004] An external fixation device, the external fixation device comprising:

[0005] Base;

[0006] A first fixing member is used to fix one of the proximal bone and the distal bone. The first fixing member is movably connected to one end of the base along a first direction so that the first fixing member can rotate relative to the base about a second direction and a third direction. The first direction is 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 are perpendicular.

[0007] A fixation component for fixing the other of the proximal and distal bones, the fixation component being movably connected to one end of the base away from the first fixation member along the first direction, so that the fixation component is movable relative to the base along the second and third directions, and is movable relative to the base along the first direction and rotated about the first direction.

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

[0009] In one of the embodiments, the external bone fixation device comprises a first locking member detachably connected to the base, the base is provided with a recess near one end of the connecting portion, the connecting portion extends into the recess and the two are spherical surface matched, when the first locking member is not locked with the base, the connecting portion can rotate in the recess, when the first locking member is locked with the base, 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-shaped mark in longitudinal and transverse interlaced manner, and the base is provided with a first pointer outside the recess away from the fixing assembly.

[0011] In one of the embodiments, the fixing assembly comprises an adjusting member and a second fixing member, the adjusting member is 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 along the second direction and the third direction relative to the base, the second fixing member is used for fixing the other one of the proximal end bone and the distal end bone, and the second fixing member is movably connected to the adjusting member, so that the second fixing member can move along the first direction and rotate around the first direction relative to the adjusting member.

[0012] In one of the embodiments, the external bone fixation device comprises a second locking member having a locked state and an unlocked state, 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 of the embodiments, the outer circumferential surface of the second fixing member is provided with a second mesh-shaped mark in longitudinal and transverse interlaced manner, and one end of the adjusting member away from the first fixing member is provided with a second pointer.

[0014] In one of the embodiments, the external bone fixation device comprises a third locking member detachably connected to the base, 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 along the second direction and the third direction relative to the base.

[0015] In one of the embodiments, the base is provided with a stepped hole at the end away from the first fixing member, the stepped hole has a stepped surface, the adjusting member comprises an adjusting ring and a boss protruding from the outer circumferential surface of the adjusting ring, the second fixing member is arranged in the adjusting ring, and the boss is locked between the third locking member and the stepped surface when the third locking member is locked with the base.

[0016] In one of the embodiments, the end surface of the boss is provided with a third pointer pointing to the second direction and a fourth pointer pointing to the third direction, the stepped surface is provided with a plurality of second direction identification lines arranged along the second direction and a plurality of third direction identification lines arranged along the third direction, the third pointer can be aligned with the second direction identification lines, and the fourth pointer can be aligned with the third direction identification lines.

[0017] In one of the embodiments, the first fixing member comprises a first fixing needle for fixing to one of the proximal bone and the distal bone, and the fixing assembly comprises a second fixing needle for fixing to the other of the proximal bone and the distal bone.

[0018] The above bone external fixation device comprises a base, a first fixing member and a fixing assembly, the connection with one of the proximal bone and the distal bone is realized through the first fixing member, and the connection with the other of the proximal bone and the distal bone is realized through the fixing assembly. The first fixing member is movably connected to the base at the end along the first direction, so that the first fixing member can rotate relative to the base along the second direction and the third direction; the fixing assembly is movably connected to the base at the end 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 and rotate relative to the base along 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 of the proximal bone and the distal bone around the first direction, the second direction and the third direction, i.e. the relative movement of the two in six degrees of freedom, can be realized. In the device, when the relative movement in the above six degrees of freedom is needed, the first fixing member is only needed to rotate relative to the base along the second direction and the third direction, and the fixing assembly is only needed to move and rotate relative to the base along the first direction, and move relative to the base along the second direction and the third direction, so that the positional 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 several parts is relatively independent, and the positional deviation in other directions will not be affected due to the adjustment of one part, the accuracy of the adjustment is higher, and the operation difficulty is lower. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a structural schematic diagram of a bone external fixation device in an embodiment of the present application.

[0020] Figure 2 An exploded view of the bone external fixation device parts in an embodiment of the present application.

[0021] Figure 3 A sectional view of the bone external fixation device in an embodiment of the present application.

[0022] Figure 4 A right view of the base in an embodiment of the present application.

[0023] Figure 5 A front view of the base in an embodiment of the present application.

[0024] Figure 6 A left view of the base in an embodiment of the present application.

[0025] Figure 7 A front view of the adjusting member in an embodiment of the present application.

[0026] Figure 8 A left view of the adjusting member in an embodiment of the present application.

[0027] Reference signs:

[0028] 100, base; 110, recess; 120, protrusion; 130, first pointer; 140, stepped hole; 141, first hole part; 142, second hole part; 143, stepped surface; 1431, second direction identification line; 1432, third direction identification line; 200, first fixing member; 210, rod part; 211, first clamping arm; 212, second clamping arm; 220, connecting part; 221, first net-like identification; 300, 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 net-like identification; 500, first fixing needle; 600, second fixing needle; 710, first locking member; 711, connecting arm; 712, abutting wall; 720, third locking member; 721, holding part; 722, extending part. DETAILED DESCRIPTION

[0029] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in many different ways without being limited to the embodiments described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0030] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0031] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0032] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0033] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on" or "below" the second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] It is to be noted that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In addition, it is to be understood that when an element such as a layer, film, region, or substrate is referred to as being "connected" to or "coupled" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. As used herein, the term "about" when used in reference to a particular recited numerical value, means that the value can vary from the recited value by no more than 1%, 2%, 5%, or 10%. As used herein, the term "substantially" means that a property is 100%, plus or minus a few percent, of the desired value. As used herein, the terms "vertical", "horizontal", "up", "down", "left", "right", and similar terms are used for explanation only, and are not intended to be limiting.

[0035] Referring to Figures 1 to 3 In one embodiment, the external fixation device for bone includes a base 100, a first fixation member 200, and a fixation assembly. The first fixation member 200 is configured to be fixed to one of a proximal bone and a distal bone. The fixation assembly is configured to be fixed to the other of the proximal bone and the distal bone. The first fixation member 200 is movably connected to one end of the base 100 along a first direction, such that the first fixation member 200 is capable of rotating relative to the base 100 along a second direction and a third direction. The first direction is a direction in which the proximal bone and the distal bone are arranged, and any two of the first direction, the second direction, and the third direction are perpendicular to each other. The fixation assembly is movably connected to the other end of the base 100 along the first direction away from the first fixation member 200, such that the fixation assembly is capable of moving relative to the base 100 along the second direction and the third direction, and is capable of moving relative to the base 100 along the first direction and rotating relative to the base 100 along the first direction.

[0036] Specifically, the second direction is a radial direction of the proximal bone and the distal bone, i.e., the device is installed on one side of the proximal bone and the distal bone along the second direction during use.

[0037] The above external fixation device for bone is connected with one of the proximal bone and the distal bone through the first fixing member 200, and connected with 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 the base 100 at one end 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; and the fixing assembly is movably connected to the base 100 at the end 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. Thus, 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 of the proximal bone and the distal bone around the first direction, the second direction and the third direction, i.e. the relative movement of the proximal bone and the distal bone in six degrees of freedom, can be realized. In the device, when the relative movement in the above six degrees of freedom is needed, the first fixing member 200 is only needed to rotate relative to the base 100 around the second direction and the third direction, and the fixing assembly is only needed to move 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 that the positional 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 positional deviation in other directions will not be affected by the adjustment of one direction, the accuracy of the adjustment is higher, and the operation difficulty is lower.

[0038] Referring to Figures 1 to 3 In some embodiments, the fixing assembly comprises an adjusting member 300 and a second fixing member 400. The adjusting member 300 is movably connected to the base 100 at the end 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 fix 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.

[0039] In the above embodiment, when the relative movement of 6 degrees of freedom between the proximal bone and the distal bone is needed, the first fixing member 200 is only needed to rotate around the second direction and the third direction relative to the base 100, the second fixing member 400 is only needed to move along the first direction and rotate around the first direction relative to the adjusting member 300, and the adjusting member 300 is only needed to move along the second direction and the third direction relative to the base 100, so that the positional deviation of the proximal bone and the distal bone in 6 directions is eliminated, the proximal bone and the distal bone are restored to the normal position, and repeated adjustment is not needed, and the operation is relatively simple. In addition, in the above adjustment process, the adjustment of several directions is relatively independent, and the position of other directions will not be affected by the adjustment of one direction, the accuracy of the adjustment is higher, and the operation difficulty is lower.

[0040] Referring to Figures 1 to 3 In some embodiments, the first fixing member 200 includes a connecting portion 220 and a rod portion 210 extending along the 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-hinged to the base 100, and the rod portion 210 is used to be connected to one of the proximal bone and the distal bone.

[0041] The connecting portion 220 is ball-hinged to the base 100, so the connecting portion 220 can rotate 360 degrees relative to the base 100, and the rotation around the second direction and the third direction described above can be naturally realized.

[0042] In some embodiments, the connecting portion 220 and the rod portion 210 can be integrally connected by an integral molding manner, or in some embodiments, the two can be separately manufactured and then fixed together by clamping, bonding or the like.

[0043] Referring to Figures 3 to 5 In some embodiments, the external bone fixation device includes a first locking member 710 detachably connected to the base 100, one end of the base 100 close to the connecting portion 220 is provided with a recessed portion 110, the connecting portion 220 extends into the recessed portion 110 and the contact area of the two is spherical surface matching, when the first locking member 710 is not locked with the base 100, the connecting portion 220 can rotate in the recessed portion 110, and when the first locking member 710 is locked with the base 100, 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 recess, 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 completely fitted with the wall surface of the recessed portion 110 after extending into the recessed portion 110, and can rotate flexibly in the recessed portion 110. In this way, the ball-hinge connection of the connecting portion 220 and the base 100 can be realized.

[0045] The first locking member 710 is detachably mounted on the base 100 by screwing. Specifically, the first locking member 710 is annular, and is sleeved on the end of the base 100 close to the connecting portion 220, and is screwed on the connecting portion 220 to abut against 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 an abutting wall 712, both of which are annular. The abutting 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 abutting wall 712 extends along the radial direction of the base 100. The base 100 includes a protrusion 120 at one end close to the connecting portion 220, the connecting arm 711 is sleeved on the protrusion 120, and the two are screwed together. The outer circumferential surface of the connecting arm 711 is provided with a sawtooth-shaped protrusion for a user to hold and rotate. As the connecting arm 711 is gradually tightened, the inner side wall of the abutting wall 712 will gradually abut against the surface of the connecting portion 220, thereby pressing the connecting portion 220 against the wall surface of the recess 110 and limiting the rotation of the connecting portion 220 in the recess 110.

[0046] In other embodiments, the first locking member 710 and the base 100 can also be detachably mounted by clamping or the like.

[0047] In other embodiments, a spherical member can also be provided on the base 100, and a spherical recess is provided on the connecting portion 220, the spherical member extends into the spherical recess to achieve spherical hinge connection.

[0048] Referring to Figure 1 , Figure 2 and Figure 4 In some embodiments, the outer surface of the connecting portion 220 is provided with a first mesh-shaped mark 221 intersecting longitudinally and transversely, and the end of the base 100 away from the fixing assembly is provided with a first pointer 130 located outside the recess 110.

[0049] Specifically, the first pointer 130 is arranged on the end surface of the protrusion 120 and points to the connecting portion 220. The first mesh-shaped mark 221 includes a plurality of first type mark lines arranged at intervals and around a first direction, and a plurality of second type mark lines arranged at intervals and around a second direction, the two types of mark lines intersect with each other to form a mesh shape similar to latitude and longitude lines. It can be understood that when the first fixing member 200 rotates relative to the base 100 around the second direction, the first type mark line aligned by 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 type mark line aligned by the first pointer 130 will be different. Therefore, when the connecting portion 220 is rotated, the angle of rotation can be correspondingly obtained by judging the position of the first mesh-shaped mark 221 aligned by the first pointer 130. 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 transparent material and has a transparent appearance, so that the angle of the connecting part 220 can be observed conveniently. When the position of the connecting part 220 needs to be adjusted, the first locking member 710 is loosened, and then the connecting part 220 is rotated to the desired direction and angle, and the position of the first pointer 130 pointing to the first meshed mark 221 is observed through the first locking member 710. When the connecting part 220 is rotated to the desired position, the first locking member 710 is tightened.

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

[0052] Specifically, the adjusting member 300 comprises an adjusting ring 310 in the shape of a circular ring, and the second fixation member 400 is in the shape of a cylindrical rod. The second fixation member 400 is inserted into the adjusting ring 310, and the outer circumferential surface of the second fixation member 400 contacts the inner circumferential surface of the adjusting ring 310. In the unlocked state, the second fixation member 400 can move in 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 penetrating through in the radial direction of the adjusting ring 310, and 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 circumferential surface of the second fixation member 400, so as to limit the relative movement between the second fixation member 400 and the adjusting ring 310.

[0053] Preferably, the second fixation member 400 penetrates through the adjusting ring 310, that is, the end surface of the second fixation member 400 extends out of the adjusting ring 310, so that the contact area between the outer circumferential surface of the second fixation member 400 and the inner circumferential surface of the adjusting ring 310 is larger, and the support for the second fixation member 400 is more stable.

[0054] Referring to Figure 3 , Figure 7 and Figure 8 In some embodiments, the outer circumferential surface of the second fixation member 400 is provided with second meshed marks 410 intersecting longitudinally and transversely, and the end of the adjusting member 300 away from the first fixation member 200 is provided with a second pointer 312.

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

[0056] Referring to 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 is locked with the base 100, the adjusting member 300 is clamped between the third locking member 720 and the base 100, so that the movement of the adjusting member 300 is inhibited. When it is necessary to adjust the position of the adjusting member 300, the third locking member 720 and the base 100 are no longer clamped with the adjusting member 300. At this time, the adjusting member 300 can move along the second direction and the third direction.

[0058] Referring to Figure 3 , Figure 5 With Figure 7 In some embodiments, the end of the base 100 away from the first fixing member 200 is provided with a stepped hole 140 having a stepped surface 143. The adjusting member 300 includes an adjusting ring 310 and a boss 320 protruding from the outer circumferential surface of the adjusting ring 310. The second fixing member 400 is arranged in 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.

[0059] Specifically, the stepped hole 140 comprises a first hole portion 141 and a second hole portion 142 which are in communication with each other, and the second hole portion 142 is located at an end of the first hole portion 141 which is away from the first fixing member 200. The diameter of the second hole portion 142 is greater than that of the first hole portion 141, so as to form a stepped surface 143 between the two. The boss 320 is annular, and is sleeved on the outer circumferential surface of the adjusting ring 310, and the two are integrated. The second fixing member 400 and the adjusting ring 310 both extend into the stepped hole 140, and 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 stepped surface 143, so as to inhibit the movement of the adjusting member 300.

[0060] In some embodiments, the third locking member 720 is detachably mounted with the base 100 in a threaded connection manner. Specifically, the third locking member 720 is annular, extends into the second hole portion 142, and is threadedly connected with the hole wall of the second hole portion 142, so as to clamp the boss 320 with the stepped surface 143, and inhibit the movement of the adjusting member 300 in the second direction and the third direction. When the third locking member 720 is loosened, the third locking member 720 no longer clamps the adjusting member 300 with the stepped surface 143.

[0061] Specifically, the third locking member 720 comprises a holding portion 721 and an extending portion 722 which are connected with each other, the extending portion 722 extends into the second hole portion 142 and is threadedly connected with the hole wall of the second hole portion 142, and the end wall of the extending portion 722 clamps the boss 320 with the stepped surface 143. The holding portion 721 is exposed, and the outer circumferential surface thereof is provided with serrated protrusions for the user to hold and rotate. By rotating the holding portion 721, the extending portion 722 can be screwed in and out.

[0062] In other embodiments, the third locking member 720 can also be detachably mounted with the base 100 in a clamping manner or the like.

[0063] Referring to Figure 3 , Figure 6 and Figure 8 In some embodiments, the end surface of the boss 320 is provided with a third pointer 321 which points to the second direction, and a fourth pointer 322 which points to the third direction, the stepped surface 143 is provided with a plurality of second direction identification lines 1431 which are arranged at intervals in the second direction, and a plurality of third direction identification lines 1432 which are arranged at intervals in the third direction, the third pointer 321 can be aligned with the second direction identification lines 1431, and the fourth pointer 322 can be aligned with the third direction identification lines 1432.

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

[0065] Preferably, the third locking member 720 is made of transparent material and has a transparent overall appearance, so that the current pointing positions of the second pointer 312, the third pointer 321 and the fourth pointer 322 can be conveniently observed.

[0066] Referring to Figures 1 to 3 In some embodiments, the first fixing member 200 includes a first fixing needle 500 fixed to one of the proximal end bone and the distal end bone, and the fixing assembly includes a second fixing needle 600 for fixing to the other of the proximal end bone and the distal end bone.

[0067] Specifically, the first fixing needle 500 is fixed to the proximal end bone, and the second fixing needle 600 is fixed to the distal end bone. The first fixing needle 500 is connected to the rod portion 210 in the first fixing member 200, and the second fixing needle 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 a cylindrical rod shape, which includes a first clamping arm 211 and a second clamping arm 212. The extending direction of the first fixation needle 500 is perpendicular to the first direction, and the first fixation needle 500 is clamped by the first clamping arm 211 and the second clamping arm 212 to achieve fixed installation of the first fixation needle 500. Further, the first clamping arm 211 and the second clamping arm 212 are each provided with a half hole, and the two half holes are communicated to form a space for the first fixation needle 500 to pass through. The first clamping arm 211 and the second clamping arm 212 are locked by screws so that they can tightly hold the first fixation needle 500. Preferably, a plurality of first fixation needles 500 arranged at intervals are fixed to the proximal bone, and these first fixation needles 500 are all fixed between the first clamping arm 211 and the second clamping arm 212 in the above-mentioned manner.

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

[0071] The aforementioned external bone fixation device, in use, first fixes the first fixation needle 500 to the proximal bone and the second fixation needle 600 to the distal bone, and then performs CT scanning or X-ray imaging. According to the imaging data obtained, the current relative position difference of the first fixation needle 500 and the second fixation needle 600 is analyzed and compared with the relative position difference when the first fixation needle 500 and the second fixation needle 600 are fixed on the normal bone, so that the amplitude of the relative adjustment of the first fixation needle 500 and the second fixation needle 600 in each direction can be obtained. Then, loosen each locking member in the external bone fixation device, fix the first fixation needle 500 to the rod portion 210, and fix the second fixation needle 600 to the second fixation member 400. Then, adjust the relative position of the first fixation member 200 and the second fixation member 400 according to the amplitude of the adjustment in each direction obtained above, and further adjust the relative position of the first fixation needle 500 and the second fixation needle 600, to pull the proximal bone and the distal bone and eliminate the relative position difference between them.

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

[0073] Each technical feature of the above-described embodiments can be combined with any other technical feature, and for the sake of brevity, not all possible combinations are described, but it is understood that the scope of the present disclosure encompasses all such possible combinations.

[0074] The above-described embodiments are merely illustrative of several embodiments of the present application, and the description is relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be noted 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 are all within the scope of the present application. Therefore, the scope of the patent of the present application should be subject to the appended claims.

Claims

1. An external bone fixation device, comprising: The external bone fixation device comprises: a base (100); a first fixing member (200) for fixing on one of a proximal bone and a distal bone, the first fixing member (200) being 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 any two of the first direction, the second direction and the third direction being perpendicular to each other; a fixing assembly comprising an adjusting member (300) and a second fixing member (400), the adjusting member (300) being 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) being for fixing on the other of the proximal bone and the distal bone, and the second fixing member (400) being movably connected to the adjusting member (300), so that the second fixing member (400) can move and rotate relative to the adjusting member (300) along and around the first direction.

2. The bone external fixation device of claim 1, wherein, The first fixing member (200) comprises a connecting portion (220) and a rod portion (210) extending along the first direction, the connecting portion (220) being connected to one end of the rod portion (210) close to the base (100), the connecting portion (220) being ball-hinged to the base (100), and the rod portion (210) being for connecting to one of the proximal bone and the distal bone.

3. The bone external fixation device of claim 2, wherein, The external bone fixation device comprises a first locking member (710) detachably connected to the base (100), the base (100) being provided with a recess (110) at one end close to the connecting portion (220), the connecting portion (220) extending into the recess (110) and being in spherical surface cooperation with the recess (110), when the first locking member (710) is not locked with the base (100), the connecting portion (220) can rotate in the recess (110), and when the first locking member (710) is locked with the base (100), the first locking member (710) abuts against the connecting portion (220) to limit the rotation of the connecting portion (220).

4. The bone external fixation device of claim 3, wherein, An outer surface of the connecting portion (220) is provided with first mesh-shaped marks (221) in longitudinal and transverse interlacing arrangement, and one end of the base (100) away from the fixing assembly is provided with a first pointer (130) located outside the recess (110).

5. The bone external fixation device of claim 1, wherein, The bone external fixation device comprises 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 penetrates through the adjusting member (300) and abuts against the second fixing member (400).

6. The bone external fixation device of claim 5, wherein, The outer circumferential surface of the second fixing member (400) is provided with a second mesh-shaped mark (410) intersecting longitudinally and transversely, and the end of the adjusting member (300) away from the first fixing member (200) is provided with a second pointer (312).

7. The bone external fixation device of claim 5, wherein, The bone external fixation device comprises a third locking member (720) detachably connected to the base (100), and 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 along the second direction and the third direction relative to the base (100).

8. The bone external fixation device of claim 7, wherein, The end of the base (100) away from the first fixing member (200) is provided with a stepped hole (140) having a stepped surface (143), the adjusting member (300) comprises an adjusting ring (310) and a boss (320) protruding from the outer circumferential surface of the adjusting ring (310), the second fixing member (400) penetrates through the adjusting ring (310), and 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).

9. The bone external fixation device of claim 8, wherein, The end surface of the boss (320) is provided with a third pointer (321) pointing to the second direction and a fourth pointer (322) pointing to the third direction, the stepped surface (143) is provided with a plurality of second direction mark lines (1431) arranged at intervals along the second direction and a plurality of third direction mark lines (1432) arranged at intervals along the third direction, the third pointer (321) can be aligned with the second direction mark lines (1431), and the fourth pointer (322) can be aligned with the third direction mark lines (1432).

10. The bone external fixation device according to any one of claims 1 to 4, wherein, The first fixing member (200) comprises a first fixing needle (500) for fixing one of the proximal end bone and the distal end bone, and the fixing assembly comprises a second fixing needle (600) for fixing the other of the proximal end bone and the distal end bone.

Images