Tibia osteotomy system and its osteotomy amount adjustment device

Abstract

The tibial osteotomy system and its osteotomy amount adjustment device provided by the present invention. The osteotomy amount adjustment device includes a first rod, a second rod, and an adjusting member. The first rod is provided with a first guide groove. The second rod is connected to the first rod. A first shaft is connected to the second rod. The first shaft is inserted into the first guide groove. The adjusting member is rotationally connected to the second rod through the first shaft. The adjusting member is provided with a second guide groove. The first rod is provided with a second shaft. When the adjusting member rotates relative to the first rod around the first shaft, the second shaft moves along the second guide groove and approaches or moves away from the first shaft to adjust the relative position of the first rod and the second rod in the length direction of the first rod. The tibial osteotomy system and its osteotomy amount adjustment device provided by the present invention utilize the constraint of the second guide groove on the adjusting member to the second shaft, so that when the second shaft moves along the second guide groove, it can move relative to the first shaft finely, thereby enabling precise fine adjustment of the osteotomy position.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a tibial osteotomy system and an osteotomy amount adjusting device thereof. Background Art

[0002] During the unicompartmental knee arthroplasty, osteotomy of the tibial side is required to install a suitable tibial prosthesis. The accuracy of the osteotomy position will directly affect the result of the prosthesis installation. Based on this, during the knee arthroplasty, an osteotomy amount fine-tuning device is usually adopted to finely adjust the height of the tibial osteotomy plate, so that the tibial osteotomy plate reaches the most suitable osteotomy position for precise osteotomy of the tibial plateau.

[0003] Traditional tibial osteotomy amount fine-tuning devices are generally screw fine-tuning type or snap-fastener type (i.e., gear type).

[0004] Among them, in the screw fine-tuning type, the upper rod and the lower rod are connected together by threads, the tibial osteotomy plate is connected to the upper rod, and by rotating the nut, the upper rod moves up and down relative to the lower rod, thereby realizing the fine adjustment of the tibial osteotomy plate. In this structure, during the rotation of the threads, grinding debris is easily generated, causing jamming, or jamming is likely to occur due to thread precision problems. In addition, the rotational force is likely to cause the upper rod to shift, and the locking is unstable and prone to loosening.

[0005] Most of the snap-fastener type fine-tuning methods control the locking or movement of the upper rod by controlling the engagement or disengagement between the racks. When the racks are disengaged from each other, the upper rod can be moved to adjust the position of the tibial osteotomy plate connected to the upper rod. When the racks are engaged with each other, the racks lock the position of the upper rod to fix the position of the tibial osteotomy plate. Although this structure has stable and reliable locking, the adjustment continuity is poor and it cannot meet the precise adjustment of the position of the tibial osteotomy plate. Summary of the Invention

[0006] Based on this, the present invention provides an osteotomy amount adjusting device with a more precise adjustment effect and includes the osteotomy amount adjusting device.

[0007] An osteotomy amount adjusting device provided by the present invention includes:

[0008] A first rod member, provided with a first guide groove, and the first guide groove extends substantially along the length direction of the first rod member;

[0009] A second rod member, connected to the first rod member, a first shaft is connected to the second rod member, the first shaft is inserted into the first guide groove and can move along the first guide groove;

[0010] An adjusting member, wherein the adjusting member is rotatably connected to the second rod member via the first axis, a second guide groove is provided on the adjusting member, the first rod member is provided with a second axis, and the second axis is inserted into the second guide groove. When the adjusting member rotates around the first axis relative to the first rod member, the second axis moves along the second guide groove and approaches or moves away from the first axis to adjust the relative positions of the first rod member and the second rod member along the length direction of the first rod member.

[0011] In one embodiment, the first rod is provided with an inserting cavity, the first guide groove penetrates the side wall of the inserting cavity to be connected with the inserting cavity, and the second rod is inserted into the inserting cavity in a telescopic and movable manner.

[0012] In one embodiment, a stop member is included, which can be moved along the length direction of the second rod to abut against the adjusting member to limit the rotation of the adjusting member around the first axis, and the stop member can leave the adjusting member along the length direction of the second rod to release the abutment limit on the adjusting member.

[0013] In one embodiment, the adjusting member is provided with a toothed edge, and the stopping member has locking teeth, and the locking teeth cooperate with the toothed edge.

[0014] In one embodiment, the meshing teeth of the toothed edge are arranged in an arc shape along the circumference of the first shaft.

[0015] In one embodiment, the tooth top radius of the toothed edge is 15 mm to 60 mm.

[0016] In one embodiment, an elastic member is included, and the elastic member is arranged between the first rod and the stopper, or between the second rod and the stopper.

[0017] In one embodiment, the elastic member is a spring, and the spring is sleeved on the first rod member or the second rod member, and elastically holds the stop member against the adjusting member.

[0018] In one embodiment, the first rod or the second rod is provided with a supporting surface, and the spring is in contact with the supporting surface.

[0019] In one embodiment, with the intersection of the first axis and the adjusting member as the center, the radius of the second guide groove on each arc is different.

[0020] On the other hand, the present invention provides a tibial osteotomy system, which includes an osteotomy guide plate, an ankle holder, and the above-mentioned osteotomy amount adjustment device. The osteotomy guide plate has an osteotomy groove, and the osteotomy groove penetrates through opposite sides of the osteotomy guide plate. The ankle holder is used to be fixed to the lower limb of a patient. One of the first rod and the second rod is connected to the osteotomy guide plate, and the other is connected to the ankle holder.

[0021] The tibial osteotomy system and its osteotomy amount adjustment device provided by the present invention. The osteotomy amount adjustment device includes a first rod, a second rod, and an adjusting member. The first rod is provided with a first guide groove, and a first shaft is connected to the second rod. The first shaft is inserted into the first guide groove. The adjusting member is rotatably connected to the second rod through the first shaft. The adjusting member is provided with a second guide groove, and the first rod is provided with a second shaft. When the adjusting member rotates relative to the first rod around the first shaft, the second shaft moves along the second guide groove and approaches or moves away from the first shaft to adjust the relative position of the first rod and the second rod in the length direction of the first rod. Since the second shaft can move relative to the first shaft continuously and finely when moving along the second guide groove, when the osteotomy amount adjustment device adjusts the osteotomy position, a continuous and precise fine-tuning effect can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of the osteotomy amount adjustment device of the tibial osteotomy system according to an embodiment;

[0024] Figure 2 It is a schematic connection structure diagram of the first rod and the second rod with the osteotomy guide plate and the ankle holder respectively when the tibial osteotomy system according to an embodiment is installed on the tibia;

[0025] Figure 3 It is a three-dimensional structural diagram of the tibial osteotomy system according to an embodiment when the first rod and the second rod are connected to the osteotomy guide plate and the ankle holder respectively;

[0026] Figure 4 For Figure 3 It is a schematic cross-sectional structure diagram of the osteotomy guide plate in the shown tibial osteotomy system;

[0027] Figure 5 For Figure 1 It is a schematic partial structure diagram of the first rod of the shown osteotomy amount adjustment device;

[0028] Figure 6 For Figure 1 The partial structural schematic diagram of the second rod member of the osteotomy amount adjustment device shown;

[0029] Figure 7 For Figure 1 The structural schematic diagram of the adjusting member of the osteotomy amount adjustment device shown;

[0030] Figure 8 The top view structural schematic diagram of the adjusting member of the osteotomy amount adjustment device of an embodiment;

[0031] Figure 9 The three-dimensional structural schematic diagram of the stop member of the osteotomy amount adjustment device of an embodiment. Specific embodiments

[0032] To make the above objects, features, and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In the present invention, unless otherwise clearly defined and limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0037] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0038] Combined with Figure 1 As shown, an osteotomy amount adjusting device 10 provided by the present invention is used to be installed in a tibial osteotomy system to adjust the osteotomy position, so as to meet the need for precise osteotomy of the tibial B platform.

[0039] In one embodiment, the osteotomy amount adjusting device 10 includes a first rod 1 and a second rod 2. By adjusting the relative positions of the first rod 1 and the second rod 2, the overall length of the first rod 1 and the second rod 2 is changed, so as to meet the need for osteotomy height.

[0040] For example, combined with Figure 2 and Figure 3As shown, in a tibial osteotomy system provided by the present invention, a first rod 1 and a second rod 2 of the osteotomy amount adjustment device 10 are respectively connected to an osteotomy guide plate 20 and an ankle holder 30. When using the tibial osteotomy system, the ankle holder 30 is clamped and fixed at a position close to the ankle joint B2 of the patient's lower limb (tibia B). Thus, after the osteotomy amount adjustment device 10 adjusts the relative positions of the first rod 1 and the second rod 2, the osteotomy guide plate 20 moves up and down relative to the ankle holder 30. Since the ankle holder 30 is fixed on the tibia B, when the position of the osteotomy guide plate 20 is adjusted by the osteotomy amount adjustment device 10, the osteotomy guide plate 20 can move relative to the tibia B, and finally the osteotomy guide plate 20 is at a more appropriate distance below the joint surface B1 of the tibia B. In this way, the osteotomy groove 21 of the osteotomy guide plate 20 can guide the osteotomy tool to perform osteotomy on the position where osteotomy is required.

[0041] It should be noted that, with reference to Figures 2 to 4 As shown, taking the tibia B as a reference, the osteotomy guide plate 20 is a structural member for guiding the osteotomy tool to perform osteotomy on the tibia B. The osteotomy groove 21 penetrates through two opposite sides (front and back sides) of the osteotomy guide plate 20. Thus, when the osteotomy guide plate 20 is installed at the osteotomy position of the tibia B, the osteotomy tool can pass through the osteotomy groove 21 to perform osteotomy on the tibia B.

[0042] Since the osteotomy amount adjustment device 10 adjusts the relative positions of the first rod 1 and the second rod 2 to move the osteotomy guide plate 20 relative to the ankle holder 30 to the position where osteotomy is required, therefore, one of the first rod 1 and the second rod 2 is connected to the osteotomy guide plate 20, and the other is connected to the ankle holder 30.

[0043] As Figure 2 and Figure 3 shown, the osteotomy guide plate 20 is connected to one end of the first rod 1 away from the second rod 2, and the ankle holder 30 is connected to one end of the second rod 2 away from the first rod 1.

[0044] In some embodiments, the ankle holder 30 and the second rod 2 can be connected by a cross bar 40, so as to keep the osteotomy amount adjustment device 10 at a certain distance from the tibia B by using the cross bar 40, and the osteotomy guide plate 20 can be installed at a more appropriate distance from the tibia B to meet the osteotomy requirements.

[0045] The second rod 2 and the cross bar 40 can be movably connected. After adjusting their relative positions, their relative positions are locked by fasteners or locking structures to ensure the stability of the entire tibial osteotomy system when performing osteotomy on the tibia B. In some embodiments, the cross bar 40 and the second rod 2 are an integral structure, that is, the cross bar 40 and the second rod 2 are a structural member, and the two are combined into one by an integral molding method, so as to reduce the number of components and the assembly process.

[0046] Combined with Figure 1 and Figure 5 As shown, the first rod 1 is provided with a first guide groove 1c, and the first guide groove 1c extends substantially along the length direction of the first rod 1. The second rod 2 is inserted into the first rod 1. Specifically, the first rod 1 is provided with a plugging cavity 1a, and the first guide groove 1c penetrates through the side wall of the plugging cavity 1a to communicate with the plugging cavity 1a. The second rod 2 is telescopically movably inserted into the plugging cavity 1a, and then the second rod 2 can stably move relative to the first rod 1 along the plugging cavity 1a to adjust the position of the osteotomy guide plate 20.

[0047] It should be noted that the first rod 1 and the second rod 2 may not be connected by a plugging fit. For example, in some embodiments, the first rod 1 and the second rod 2 are slidably stacked together and are configured such that when the first rod 1 and the second rod 2 slide relative to each other, the overall length of the first rod 1 and the second rod 2 changes. Thus, through this structural form, the relative position of the first rod 1 and the second rod 2 in the length direction can also be adjusted to meet the need for adjusting the position of the osteotomy guide plate 20, so that the osteotomy guide plate 20 can be adjusted to a suitable height for osteotomy. A first shaft 6 is connected to the second rod 2, and the first shaft 6 is inserted into the first guide groove 1c and can move along the first guide groove 1c.

[0048] The first shaft 6 may be connected to the second rod 2 by welding or screwing. In some embodiments, the first shaft 6 may be inserted and fixed to the second rod 2. For example, combined with Figure 6 as shown, the second rod 2 is provided with a jack 2c, and the first shaft 6 is inserted into the jack 2c to realize the connection between the first shaft 6 and the second rod 2. The first shaft 6 may also be integrally formed with the second rod 2.

[0049] Since the first shaft 6 is inserted into the first guide groove 1c and can move along the first guide groove 1c, and the first guide groove 1c extends substantially along the length direction of the first rod 1, when the first shaft 6 moves along the first guide groove 1c, the second rod 2 connected to the first shaft 6 will move relative to the first rod 1, so that the combined length of the first rod 1 and the second rod 2 will be adaptively adjusted. In this way, the distance between the osteotomy guide plate 20 and the ankle holder 30 respectively connected to the first rod 1 and the second rod 2 can be adjusted to a suitable state, and then the position of the osteotomy guide plate 20 is adjusted to meet the osteotomy requirement.

[0050] Continue to refer to Figure 1 as shown, the osteotomy amount adjusting device 10 includes an adjusting member 3, and the adjusting member 3 is rotatably connected to the second rod 2 through the first shaft 6. Specifically, since the first shaft 6 is inserted into the first guide groove 1c, a part of the structure of the first shaft 6 protrudes from the surface of the first rod 1. Combined withFigure 7 As shown, a shaft hole 3c that mates with the first shaft 6 is formed in the adjusting member 3, and a partial structure of the first shaft 6 protruding from the surface of the first rod 1 mates with the shaft hole 3c.

[0051] The adjusting member 3 and the first shaft 6 can rotate relative to each other, or the first shaft 6 and the second rod 2 can rotate relative to each other. As long as the adjusting member 3 is connected to the second rod 2 through the first shaft 6, the adjusting member 3 can rotate relative to the second rod 2. For example, in some embodiments, both the first shaft 6 and the adjusting member 3 and the first shaft 6 and the second rod 2 are rotatably connected.

[0052] Combined with Figure 1 and Figure 7 As shown, a second guide groove 3b is formed in the adjusting member 3, and the first rod 1 is provided with a second shaft 7. The second shaft 7 can be fixed to the first rod 1 by means of insertion. For example, a pin hole 1b is provided at a position near the end of the first rod 1, and the second shaft 7 is inserted and mated with the pin hole 1b to be fixed on the first rod 1. In other embodiments, the second shaft 7 is threadedly connected, snap-connected, welded or integrally formed with the first rod 1. The connection manner between the second shaft 7 and the first rod 1 is not limited herein.

[0053] Taking the intersection point of the first shaft 6 and the adjusting member 3 (i.e., the shaft hole 3c) as the center of the circle, the radii of the second guide groove 3b at each radian are different, that is, the distances from the points on the second guide groove 3b at each radian to the shaft hole 3c are different, preferably gradually increasing or gradually decreasing. The second shaft 7 is inserted into the second guide groove 3b. When the adjusting member 3 rotates relative to the first rod 1 around the first shaft 6, the second shaft 7 moves along the second guide groove 3b and approaches or moves away from the first shaft 6 to adjust the relative position of the first rod 1 and the second rod 2 in the axial direction. Here, the axial direction refers to the length direction of the first rod 1 or the second rod 2. The movement of the first shaft 6 along the first guide groove 1c and the movement of the second shaft 7 along the second guide groove 3b in this article both refer to relative movement, that is, any one of the two parties moving relative to each other while the other is stationary, or both parties moving.

[0054] It should be noted that the second guide groove 3b can be a through groove, that is, it penetrates the outer surface of the adjusting member 3. The second guide groove 3b can also be a blind groove, that is, it does not penetrate the outer surface of the adjusting member 3.

[0055] In this embodiment, by using the constraint of the second guide groove 3b on the adjusting member 3 on the second shaft 7, when the second shaft 7 moves along the second guide groove 3b, it approaches or moves away from the first shaft 6, that is, the distance between the first shaft 6 and the second shaft 7 can be adjusted. The second shaft 7 is arranged on the first rod member 1. Thus, when the distance between the first shaft 6 and the second shaft 7 changes, the first shaft 6 moves along the first guide groove 1c. In this way, the second rod member 2 connected to the first shaft 6 will move relative to the first rod member 1, so as to adjust the relative position of the first rod member 1 and the second rod member 2 in the length direction of the first rod member 1. Furthermore, the osteotomy guide plate 20 connected to the first rod member 1 moves up or down relative to the second rod member 2, achieving the purpose of adjusting the position of the osteotomy guide plate 20. When the second shaft 7 moves along the second guide groove 3b, the amount of change in its position relative to the first shaft 6 is continuous. That is to say, the distance between the first shaft 6 and the second shaft 7 can be precisely controlled. Thus, when adjusting the osteotomy position of the osteotomy guide plate 20 relative to the tibia B through this osteotomy amount adjusting device 10, an accurate fine-tuning effect can be obtained.

[0056] The second guide groove 3b can be an arc groove. For example, in some embodiments, in combination with Figure 8 as shown, when the second guide groove 3b is an arc groove, the second guide groove 3b has opposite first end 3b1 and second end 3b2 in the direction along its center line. The distance r1 between the first end 3b1 and the first shaft 6 is 50 mm, and the distance r2 from the second end 3b2 to the first shaft 6 is 10 mm. r1 and r2 can take other values as long as they are not equal. In combination with Figure 1 as shown, as the adjusting member 3 rotates relative to the second rod member 2 around the axis of the first shaft 6, during the process that the second shaft 7 moves from the first end 3b1 to the second end 3b2 along the second guide groove 3b, the relative distance between the second shaft 7 and the first shaft 6 gradually decreases. Since the position between the second shaft 7 and the first rod member 1 is fixed, the first shaft 6 will move along the first guide groove 1c. Since the position between the first shaft 6 and the second rod member 2 is fixed, as the relative distance between the second shaft 7 and the first shaft 6 gradually decreases, the second rod member 2 slides relative to the first rod member 1, meeting the need to adjust the position of the osteotomy guide plate 20.

[0057] In some embodiments, in combination with Figure 8 as shown, under the cooperation and limitation of the second shaft 7 and the second guide groove 3b, the rotation amplitude β of the adjusting member 3 around the first shaft 6 is 10° to 90°.

[0058] It should be noted that the rotation amplitude β of the adjusting member 3 around the first shaft 6 refers to the angle by which the adjusting member 3 rotates when the second shaft 7 is driven to move from the first end 3b1 to the second end 3b2 of the second guide groove 3b by driving the adjusting member 3 to rotate around the first shaft 6.

[0059] In this embodiment, the rotation amplitude β of the adjusting member 3 around the first axis 6 is controlled within 10° to 90°, which can ensure that when the adjusting member 3 adjusts the relative positions of the first axis 6 and the second axis 7, there is a sufficiently large adjustment stroke. Thus, by adjusting the relative positions of the first axis 6 and the second axis 7, the relative positions of the first rod member 1 and the second rod member 2 can be precisely adjusted to adapt to the position of the osteotomy guide plate 20 to be accurately moved within a relatively large range, improving the precise control of the osteotomy amount. If the rotation amplitude β is less than 10°, the inclination of the second guide groove 3b is too steep. When the adjusting member 3 is rotated, the change in the relative positions of the first axis 6 and the second axis 7 is too fast, which is not conducive to the precise control of the osteotomy amount. If the rotation amplitude β is greater than 90°, the volume of the adjusting member 3 is too large, which is not conducive to the compactness of the entire device.

[0060] Referring again to Figure 1 As shown, the osteotomy amount adjustment device 10 includes a stopper 4. The stopper 4 can move along the length direction of the second rod member 2 to abut against the adjusting member 3 to limit the rotation of the adjusting member 3 around the first axis 6, and the stopper 4 can move away from the adjusting member 3 along the length direction of the second rod member 2 to release the abutting limit on the adjusting member 3.

[0061] In this embodiment, the position of the adjusting member 3 can be locked by using the stopper 4, so that the adjusting member 3 maintains the relative positions of the first axis 6 and the second axis 7, and further enables the first rod member 1 and the second rod member 2 to be fixed to each other to stably support the osteotomy guide plate 20. When the position of the osteotomy guide plate 20 needs to be adjusted, only the stopper 4 needs to be moved away so that the stopper 4 releases the position lock on the adjusting member 3, and then the relative positions of the first rod member 1 and the second rod member 2 can be adjusted by rotating the adjusting member 3 around the axis of the first axis 6.

[0062] Combined with Figure 1 、 Figure 7 and Figure 9 As shown, the adjusting member 3 is provided with a toothed edge 3a. The stopper 4 includes a main body portion 4b and locking teeth 4a located on the main body portion 4b. When the stopper 4 moves along the length direction of the second rod member 2 to abut against the adjusting member 3, the locking teeth 4a cooperate with the toothed edge 3a to lock the position of the adjusting member 3, so that the adjusting member 3 cannot rotate relative to the second rod member 2 around the first axis 6. At this time, the relative positions of the first axis 6 and the second axis 7 are locked to fix the position of the osteotomy guide plate 20. When the position of the osteotomy guide plate 20 needs to be adjusted, only the stopper 4 needs to be moved away from the adjusting member 3 along the length direction of the second rod member 2 to release the cooperation between the locking teeth 4a and the toothed edge 3a.

[0063] The engaging teeth of the toothed edge 3a are arranged in an arc shape circumferentially along the first axis 6, so that no matter to what position the adjusting member 3 rotates around the axis of the first axis 6, the locking teeth 4a can stably engage with the corresponding engaging teeth, thereby improving the locking stability of the position of the adjusting member 3.

[0064] In some embodiments, the crown radius R of the toothed edge 3a is 15 mm to 60 mm, such as 15 mm, 25 mm, 35 mm, 45 mm, 55 mm or 60 mm. By controlling the crown radius R of the toothed edge 3a within 15 mm to 60 mm, the distance from the toothed edge 3a of the adjusting member 3 to the axis of the first axis 6 is large enough, so that when setting the second guide groove 3b, the displacement amount of the second guide groove 3b for the movement of the second axis 7 relative to the first axis 6 can be set large enough to increase the adjustment range of the osteotomy amount. At the same time, the volume of the adjusting member 3 is not too large to be disadvantageous to the compactness of the whole device.

[0065] Combined Figure 1 and Figure 9 As shown, the stop member 4 is annular, and the stop member 4 is sleeved on the first rod member 1 or the second rod member 2.

[0066] In some embodiments, the osteotomy amount adjustment device 10 includes an elastic member, such as an elastic body such as a spring or rubber, etc. The elastic member is disposed between the first rod member 1 and the stop member 4, or between the second rod member 2 and the stop member 4, and is used to elastically abut the stop member 4 against the adjusting member 3. Disposed between the first rod member 1 and the stop member 4 means that one end of the elastic member is fixedly connected or abutted to the first rod member 1, and the other end is fixedly connected or abutted to the stop member 4. The elastic member is set to a compressed state or a stretched state as needed.

[0067] Optionally, the elastic member is a spring 5, and the spring 5 is sleeved on the first rod member 1 or the second rod member 2 and elastically abuts the stop member 4 against the adjusting member 3.

[0068] The first rod member 1 or the second rod member 2 is provided with an abutting surface, such as a stepped groove or a stepped surface, etc. Taking the second rod member 2 as an example, combined Figure 6 As shown, the second rod member 2 includes two axially connected shaft bodies 2a, 2b with different radial dimensions. In this way, a stepped surface is formed at the connection surface of the two shaft bodies 2a, 2b. Optionally, the stepped surface is recessed away from the shaft body 2a to form a stepped groove. The spring 5 is received in the stepped groove and abuts against the bottom surface of the groove. In this way, the spring 5 will not protrude excessively from the surface of the second rod member 2, making the overall structure of the osteotomy amount adjustment device 10 compact and small. The form of the abutting surface is not limited to this, as long as it can ensure that one end of the spring 5 can abut or be fixedly connected to it. For example, it can also be a flange provided on the first rod member 1 or the second rod member 2. At this time, the first rod member 1 or the second rod member 2 does not have to be set as two sections with different thicknesses. Taking Figure 1For example, when the abutting surface is on the left side of the stopper 4, the elastic member is in a stretched state; when the abutting surface is on the right side of the stopper 4, the elastic member is in a compressed state.

[0069] Combined Figure 1 with Figure 7 As shown, the adjusting member 3 can be a mirror-symmetrical structure, forming an avoidance space 304 for the second rod 2 to pass through. When the adjusting member 3 is installed on the first rod 1, corresponding second guide grooves 3b, second shafts 7, etc. are provided on both opposite sides of the first rod 1, making the assembly between the adjusting member 3, the first rod 1, and the second rod 2 more stable.

[0070] It can be understood that it is not necessary for the adjusting member 3 to be in a mirror-symmetrical structure. In the foregoing embodiment, as long as the adjusting member 3 can be rotatably connected to the second rod 2 through the first shaft 6 and the relative distance between the first shaft 6 and the second shaft 7 can be adjusted by setting the second guide groove 3b to guide the second shaft 7 to approach or move away from the first shaft 6 during the sliding process, the relative distance between the first rod 1 and the second rod 2 can be adjusted along the length direction of the first rod 1, thereby adjusting the position of the osteotomy guide plate 20.

[0071] Combined Figure 7 As shown, the adjusting member 3 with a mirror-symmetrical structure includes a first guide piece 301 and a second guide piece 302 arranged at intervals. The first guide piece 301 and the second guide piece 302 are connected by two connecting arms 303 arranged at intervals. The two connecting arms 303, the first guide piece 301, and the second guide piece 302 enclose an avoidance space 304. When the adjusting member 3 is installed on the first rod 1, the first guide piece 301 and the second guide piece 302 are respectively located on both sides of the first rod 1, and the second rod 2 passes through the avoidance space 304 and cooperates with the first rod 1.

[0072] At least one of the first guide piece 301 and the second guide piece 302 is provided with a second guide groove 3b. The second shaft 7 connected to the first rod 1 is in sliding fit with the corresponding second guide groove 3b, so that the second shaft 7 can approach or move away from the first shaft 6 during the sliding process along the second guide groove 3b, satisfying the adjustment of the distance between the first shaft 6 and the second shaft 7.

[0073] It can be understood that in the embodiment where the adjusting member 3 includes the first guide piece 301 and the second guide piece 302, both the first guide piece 301 and the second guide piece 302 are rotatably connected to the second rod 2, and the rotation axes are coaxial, so that the adjusting member 3 can rotate relative to the second rod 2. The rotation between the first guide piece 301, the second guide piece 302 and the second rod 2 can adopt the same first shaft 6 to enhance the stability of the position adjustment between the adjusting member 3 and the first rod 1 and the second rod 2. In other embodiments, different first shafts 6 can also be adopted, as long as the first shafts 6 connected to the first guide piece 301 and the second guide piece 302 are coaxially arranged. Correspondingly, in the embodiment where the adjusting member 3 is provided with the shaft hole 3c, the shaft hole 3c can be provided on either the first guide piece 301 or the second guide piece 302, or shaft holes 3c are provided on both the first guide piece 301 and the second guide piece 302.

[0074] In this embodiment, the toothed edge 3a of the adjusting member 3 can be located on either the first guide piece 301 or the second guide piece 302, or toothed edges 3a are provided on both the first guide piece 301 and the second guide piece 302, as long as the locking teeth 4a on the stopper 4 can be engaged with the corresponding toothed edge 3a to lock the adjusting member 3. For example, in combination with Figure 7 and Figure 9 As shown, when toothed edges 3a are provided on both the first guide piece 301 and the second guide piece 302, at least two locking teeth 4 are provided on the stopper 4, and the two locking teeth 4 respectively correspond to the toothed edges 3a on the first guide piece 301 and the second guide piece 302. Thus, when the stopper 4 locks the position of the adjusting member 3, this structural setting can effectively improve the locking stability. In this embodiment, the stopper 4 can also be provided with only one locking tooth 4, as long as the locking tooth 4 can cooperate with the toothed edge 3a of either the first guide piece 301 or the second guide piece 302 to lock the adjusting member 3.

[0075] It should be noted that the installation position and structural form of the stopper 4 can also be other situations.

[0076] For example, when the first shaft 6 is rotatably connected to the shaft hole 3c of the adjusting member 3, the stopper 4 is arranged between the first shaft 6 and the adjusting member 3 and is used to selectively lock or release the rotational freedom of the adjusting member 3 around the first shaft 6, and the position locking or release of the adjusting member 3 can be achieved.

[0077] For another example, in some other embodiments, the stopper 4 is movably arranged on the adjusting member 3 and is used to selectively lock or release the moving freedom of the second shaft 7 along the second guide groove 3b.

[0078] The structure and the installation position of the stopper 4 are not limited herein, as long as the stopper 4 can selectively lock or release the corresponding adjusting member 3, so that the adjusting member 3 cannot rotate relative to the second rod 2 when it is locked.

[0079] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered that the scope described in this specification.

[0080] The above-described embodiments merely represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. An osteotomy amount adjustment device, characterized in that, comprising: A first rod member having a first guide groove extending substantially along the length direction of the first rod member; A second rod member connected to the first rod member, a first shaft is connected to the second rod member, the first shaft is inserted into the first guide groove and can move along the first guide groove; An adjusting member, the adjusting member is rotatably connected to the second rod member through the first shaft, a second guide groove is provided on the adjusting member, a second shaft is provided on the first rod member, the second shaft is inserted into the second guide groove, when the adjusting member rotates relative to the first rod member around the first shaft, the second shaft moves along the second guide groove and approaches or moves away from the first shaft to adjust the relative position of the first rod member and the second rod member in the length direction of the first rod member; with the intersection point of the first shaft and the adjusting member as the center, the radii of the second guide groove at each radian are different, and under the cooperation and limitation of the second shaft and the second guide groove, the rotation amplitude of the adjusting member around the first shaft is 10° to 90°.

2. The osteotomy amount adjustment device according to claim 1, characterized in that, The first rod member is provided with a plugging cavity, the first guide groove penetrates through the side wall of the plugging cavity to communicate with the plugging cavity, and the second rod member is telescopically inserted into the plugging cavity.

3. The osteotomy amount adjustment device according to claim 1, characterized in that, Comprising a stop member, the stop member can move along the length direction of the second rod member to abut against the adjusting member to limit the rotation of the adjusting member around the first shaft, and the stop member can move away from the adjusting member along the length direction of the second rod member to release the abutting limit on the adjusting member.

4. The osteotomy amount adjustment device according to claim 3, characterized in that, The adjusting member is provided with a toothed edge, the stop member has a locking tooth, and the locking tooth cooperates with the toothed edge.

5. The osteotomy amount adjustment device according to claim 4, characterized in that, The meshing teeth of the toothed edge are arranged in an arc shape along the circumferential direction of the first shaft.

6. The osteotomy amount adjustment device according to claim 5, characterized in that, The tooth tip radius of the toothed edge is 15 mm to 60 mm.

7. The osteotomy amount adjustment device according to any one of claims 3-6, characterized in that, Comprising an elastic member, the elastic member is arranged between the first rod member and the stop member, or between the second rod member and the stop member.

8. The osteotomy amount adjustment device according to claim 7, characterized in that, The elastic member is a spring, the spring is sleeved on the first rod member or the second rod member, and elastically abuts the stop member against the adjusting member.

9. The osteotomy amount adjustment device according to claim 8, characterized in that, The first rod member or the second rod member is provided with an abutting surface, and the spring abuts against the abutting surface.

10. The osteotomy amount adjustment device according to claim 1, characterized in that, The first rod member and the second rod member are slidably stacked together and configured such that when the first rod member and the second rod member slide relative to each other, the overall length of the first rod member and the second rod member changes.

11. A tibial osteotomy system, characterized in that it includes an osteotomy amount adjustment device, an osteotomy guide plate and an ankle holder as described in any one of claims 1-10. The osteotomy guide plate has an osteotomy groove that penetrates opposite sides of the osteotomy guide plate. The ankle holder is used to be fixed to the lower limb of a patient. One of the first rod member and the second rod member is connected to the osteotomy guide plate, and the other is connected to the ankle holder.

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