CN215018425U - Tibia osteotomy system and osteotomy amount adjusting device thereof - Google Patents

Abstract

The utility model provides a shin bone cuts bone system and cuts bone volume adjusting device thereof, this cut bone volume adjusting device includes first member, second member and regulating part, first guide slot has been seted up to first member, the second member links to each other with first member, be connected with the primary shaft on the second member, the primary shaft is inserted and is located first guide slot, the regulating part rotates with the second member through the primary shaft and is connected, the second guide slot has been seted up on the regulating part, first member is equipped with the secondary shaft, when the regulating part rotates around the relative first member of primary shaft, the secondary shaft removes and is close to or keeps away from the primary shaft along the second guide slot, with the relative position of adjustment first member and second member on the length direction along first member. The utility model provides a shin bone cuts bone system and cuts bone volume adjusting device thereof utilizes the second guide slot on the regulating part to the restraint of second shaft for the second shaft can finely move relative primary shaft when moving along the second guide slot, thereby can be to cutting the accurate fine setting of bone position.

Description

Tibia osteotomy system and osteotomy amount adjusting device thereof

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a shin bone cuts bone system and cuts bone volume adjusting device thereof.

Background

Resection of the tibial side is required during unicondylar knee replacement surgery to install a suitable tibial prosthesis. The accuracy of the osteotomy position directly influences the installation result of the prosthesis, and therefore, in the knee joint replacement surgery, a tibial osteotomy amount fine-adjustment device is usually adopted to perform fine adjustment on the height of the tibial osteotomy plate so that the tibial osteotomy plate reaches the most appropriate osteotomy position, so as to perform accurate osteotomy on a tibial plateau.

Conventional tibial osteotomy amount fine adjustment devices are typically either threaded or snap-fit (i.e., gear-type).

Wherein, the screw thread fine tuning is that upper end pole and lower extreme pole pass through threaded connection together, and the shin bone plate is connected with the upper end pole, makes the relative lower extreme pole of upper end pole reciprocate through swivel nut, and then realizes the fine setting of shin bone plate. The structure is easy to generate abrasive dust to cause jamming or jamming due to the problem of thread precision in the process of thread rotation, and the rotating force is easy to cause the deviation of the upper end rod, and the locking is unstable and easy to loosen.

The snap-in type fine adjustment is usually performed by controlling the engagement or disengagement of the racks to control the locking or movement of the upper rod, which can be moved to adjust the position of the tibial osteotome plate attached to the upper rod when the racks are disengaged from each other, and lock the position of the upper rod when the racks are engaged with each other to fix the position of the tibial osteotome plate. Although the structure is stable and reliable in locking, the adjustment continuity is poor, and the accurate adjustment of the position of the tibial osteotomy plate cannot be met.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides a adjust comparatively accurate bone cutting volume adjusting device of effect and include this bone cutting volume adjusting device.

The utility model provides a pair of cut bone volume adjusting device, include:

the first rod piece is provided with a first guide groove, and the first guide groove extends along the length direction of the first rod piece approximately;

the second rod piece is connected with the first rod piece, a first shaft is connected onto the second rod piece, and the first shaft is inserted into the first guide groove and can move along the first guide groove;

the adjusting piece is connected with the second rod piece in a rotating mode through the first shaft, a second guide groove is formed in the adjusting piece, the first rod piece is provided with a second shaft, the second shaft is inserted into the second guide groove, and when the adjusting piece rotates around the first shaft relative to the first rod piece, the second shaft moves along the second guide groove and is close to or far away from the first shaft so as to adjust the relative position of the first rod piece and the second rod piece in the length direction of the first rod piece.

In one embodiment, the first rod piece is provided with an insertion cavity, the first guide groove penetrates through the side wall of the insertion cavity to be communicated with the insertion cavity, and the second rod piece is inserted in the insertion cavity in a telescopic and movable manner.

In one embodiment, the adjusting device comprises a stopping piece, the stopping piece can move along the length direction of the second rod piece to abut against the adjusting piece so as to limit the adjusting piece to rotate around the first shaft, and the stopping piece can leave the adjusting piece along the length direction of the second rod piece so as to release the abutting limit of the adjusting piece.

In one embodiment, the adjustment member is provided with a toothed edge and the stop member has a locking tooth which cooperates with the toothed edge.

In one embodiment, the engaging teeth of the toothed edge are arranged in a circular arc shape along the circumferential direction of the first shaft.

In one embodiment, the tooth crest radius of the tooth-shaped edge is 15 mm-60 mm.

In one embodiment, the elastic member is arranged between the first rod piece and the stop piece or between the second rod piece and the stop piece.

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 supports the stop member against the adjusting member.

In one embodiment, the first rod or the second rod is provided with a propping surface, and the spring props against the propping surface.

In one embodiment, the second guide groove has different radiuses in all radians by taking the intersection point of the first shaft and the adjusting piece as a circle center.

On the other hand, the utility model provides a shin bone cuts system, including cutting the bone baffle, embracing ankle ware and foretell bone cutting volume adjusting device, the bone baffle has cuts the bone groove, cut the bone groove and run through cut the relative both sides of bone baffle, embrace the ankle ware and be used for being fixed in patient's low limbs, first member with in the second member one with cut the bone baffle and connect, another with embrace the ankle ware and connect.

The utility model provides a shin bone cuts bone system and cuts bone volume adjusting device thereof, this cut bone volume adjusting device includes first member, second member and regulating part, first guide slot has been seted up to first member, be connected with the primary shaft on the second member, the primary shaft is inserted and is located first guide slot, the regulating part rotates through the primary shaft and second member and is connected, the second guide slot has been seted up on the regulating part, first member is equipped with the secondary shaft, when the regulating part rotates around the relative first member of primary shaft, the secondary shaft removes and is close to or keeps away from the primary shaft along the second guide slot, with the relative position of adjustment first member and second member on the length direction along first member. The second shaft can continuously and finely move relative to the first shaft when moving along the second guide groove, so that the osteotomy amount adjusting device can obtain continuous accurate fine adjustment effect when adjusting the osteotomy position.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, drawings of other embodiments can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of an osteotomy amount adjustment device of a tibial osteotomy system according to an embodiment;

FIG. 2 is a schematic view of the connection structure of the first rod and the second rod with the osteotomy guide and the ankle embracing device, respectively, when the tibial osteotomy system of one embodiment is installed on a tibia;

FIG. 3 is a perspective view of an embodiment of a tibial osteotomy system with first and second rods coupled to a osteotomy guide and an ankle catcher, respectively;

FIG. 4 is a cross-sectional structural view of a bone cutting guide in the tibial bone cutting system shown in FIG. 3;

FIG. 5 is a partial structural view of a first rod of the osteotomy amount adjustment device shown in FIG. 1;

FIG. 6 is a partial structural view of a second rod of the osteotomy amount adjustment device shown in FIG. 1;

FIG. 7 is a schematic structural view of an adjusting member of the osteotomy amount adjustment device shown in FIG. 1;

FIG. 8 is a schematic top view of an adjusting member of the osteotomy amount adjustment device according to one embodiment;

fig. 9 is a perspective view illustrating a stopper of an osteotomy amount adjusting device according to an embodiment.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of 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, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

With reference to fig. 1, the present invention provides a bone cutting amount adjusting device 10 for being installed in a tibia bone cutting system, and adjusting the position of the cut bone, so as to meet the requirement of accurate bone cutting of a tibia B platform.

In one embodiment, the osteotomy amount adjusting device 10 includes a first shaft 1 and a second shaft 2. The overall length of the first rod member 1 and the second rod member 2 is changed by adjusting the relative positions of the first rod member 1 and the second rod member 2, thereby adapting to the requirements of osteotomy height.

For example, referring to fig. 2 and 3, in the present invention, a tibial osteotomy system is provided in which a first rod 1 and a second rod 2 of an osteotomy amount adjustment device 10 are connected to an osteotomy guide 20 and an ankle catcher 30, respectively. When the tibial bone cutting system is used, the ankle embracing device 30 is fixedly clamped at a position close to an ankle joint B2 of a lower limb (tibia B) of a patient, so that the bone cutting guide 20 moves up and down relative to the ankle embracing device 30 after the relative position of the first rod piece 1 and the second rod piece 2 is adjusted by the bone cutting amount adjusting device 10, and the ankle embracing device 30 is fixed on the tibia B, so that when the position of the bone cutting guide 20 is adjusted by the bone cutting amount adjusting device 10, the bone cutting guide 20 can move relative to the tibia B, and finally the bone cutting guide 20 is positioned at a proper distance below a joint surface B1 adjacent to the tibia B, so that the bone cutting groove 21 of the bone cutting guide 20 can guide the bone cutting tool to cut the position needing bone cutting.

It should be noted that, referring to the tibia B shown in fig. 2 to 4, the osteotomy guide 20 is used as a structural member for guiding the osteotomy tool to perform the osteotomy operation on the tibia B, and the osteotomy groove 21 penetrates through two opposite side surfaces (front and rear sides) of the osteotomy guide 20, so that the osteotomy tool can pass through the osteotomy groove 21 to perform the osteotomy operation on the tibia B when the osteotomy guide 20 is mounted at the osteotomy position of the tibia B.

Since the osteotomy amount adjusting device 10 adjusts the relative positions of the first bar 1 and the second bar 2 to each other so that the osteotomy guide 20 moves to a position where osteotomy is required with respect to the ankle catcher 30, one of the first bar 1 and the second bar 2 may be connected to the osteotomy guide 20 and the other may be connected to the ankle catcher 30.

As shown in FIGS. 2 and 3, the bone cutting guide 20 is connected to an end of the first shaft 1 remote from the second shaft 2, and the ankle clasper 30 is connected to an end of the second shaft 2 remote from the first shaft 1.

In some embodiments, the ankle catcher 30 and the second shaft 2 may be connected by a cross bar 40 so as to keep the osteotomy amount adjusting device 10 at a certain distance from the tibia B by the cross bar 40, and the osteotomy guide 20 may be installed at a proper distance from the tibia B to meet the osteotomy requirement.

The second rod 2 and the cross rod 40 can be movably connected, and after the relative positions of the second rod and the cross rod are adjusted, the relative positions of the second rod and the cross rod are locked through a fastener or a locking structure, so that the stability of the whole tibia osteotomy system is ensured when the tibia B is subjected to an osteotomy operation. In some embodiments, the cross bar 40 and the second rod 2 are integrated, that is, the cross bar 40 and the second rod 2 are a structural member, and the two members are integrated by integral molding, so as to reduce the number of parts and assembly steps.

Referring to fig. 1 and 5, the first rod 1 is provided with a first guide groove 1c, and the first guide groove 1c extends along the length direction of the first rod 1. The second rod member 2 is inserted into the first rod member 1, specifically, the first rod member 1 is provided with an insertion cavity 1a, the first guide groove 1c penetrates through the side wall of the insertion cavity 1a to be communicated with the insertion cavity 1a, the second rod member 2 is inserted into the insertion cavity 1a in a telescopic and movable manner, and then the second rod member 2 can stably move along the insertion cavity 1a relative to the first rod member 1 to adjust the position of the bone cutting guide plate 20.

It should be noted that the first rod 1 and the second rod 2 may be connected without using a plug-in fit manner, for example, in some embodiments, the first rod 1 and the second rod 2 are slidably stacked together, and are configured to: when the first pin 1 and the second pin 2 slide relatively, the overall length of the first pin 1 and the second pin 2 is changed. Therefore, through the structure, the relative position of the first rod part 1 and the second rod part 2 in the length direction can be adjusted, the position adjustment requirement of the bone cutting guide plate 20 can be met, and the bone cutting guide plate 20 can be adjusted to be at a proper height for bone cutting. The second rod 2 is connected with a first shaft 6, and the first shaft 6 is inserted in the first guide groove 1c and can move along the first guide groove 1 c.

The first shaft 6 may be connected to the second pin 2 by welding or screwing. In some embodiments, the first shaft 6 may be fixed to the second rod 2 by inserting, for example, as shown in fig. 6, a socket 2c is formed on the second rod 2, and the first shaft 6 is inserted into the socket 2c to connect the first shaft 6 and the second rod 2. The first shaft 6 may also be integrally formed with the second pin 2.

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 along the length direction of the first rod member 1, when the first shaft 6 moves along the first guide groove 1c, the second rod member 2 connected with the first shaft 6 and the first rod member 1 will move relative to each other, so that the combined length of the first rod member 1 and the second rod member 2 will be adjusted adaptively, so that the distance between the bone cutting guide 20 and the ankle embracing device 30 connected with the first rod member 1 and the second rod member 2, respectively, can be adjusted to a proper state, and the position of the bone cutting guide 20 can be adjusted to meet the need of bone cutting.

With continued reference to fig. 1, the osteotomy amount adjustment device 10 includes an adjustment member 3, the adjustment member 3 being rotatably coupled to the second rod member 2 by a 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 pin 1. Referring to fig. 7, the adjusting member 3 is provided with a shaft hole 3c engaged with the first shaft 6, and a portion of the first shaft 6 protruding from the surface of the first rod 1 is engaged with the shaft hole 3 c.

The adjusting member 3 and the first shaft 6 can rotate relatively, or the first shaft 6 and the second rod 2 can rotate relatively, as long as the adjusting member 3 can rotate relative to the second rod 2 after the adjusting member 3 is connected with the second rod 2 through the first shaft 6, for example, in some embodiments, the first shaft 6 and the adjusting member 3 and the first shaft 6 and the second rod 2 are connected in a rotating manner.

Referring to fig. 1 and 7, the adjusting member 3 is provided with a second guide groove 3b, and the first rod member 1 is provided with a second shaft 7. The second shaft 7 may be fixed to the first rod 1 by inserting, for example, a pin hole 1b is formed at a position of the first rod 1 near the end, and the second shaft 7 is inserted into and matched with the pin hole 1b to be fixed to the first rod 1. In other embodiments, the second shaft 7 is screwed, snapped, welded or integrated with the first bar 1. The connection between the second shaft 7 and the first rod 1 is not limited herein.

The second guide groove 3b has different radii in each arc, i.e. the distance from the point of the second guide groove 3b in each arc to the shaft hole 3c is different, preferably gradually increasing or gradually decreasing, with the intersection point (i.e. the shaft hole 3c) of the first shaft 6 and the adjusting member 3 as the center. The second shaft 7 is inserted into the second guide groove 3b, and when the adjusting member 3 rotates around the first shaft 6 relative to the first rod member 1, the second shaft 7 moves along the second guide groove 3b and approaches or departs from the first shaft 6, so as to adjust the relative position of the first rod member 1 and the second rod member 2 in the axial direction, where the axial direction is along the length direction of the first rod member 1 or the second rod member 2. In this context, the first shaft 6 and the second shaft 7 both move along the first guide groove 1c and the second guide groove 3b, respectively, refer to relative movement, i.e., either one of the two relative movements moves, while the other one is stationary, or both the two movements may move.

It should be noted that the second guiding groove 3b may be a through groove, i.e. penetrating through the outer surface of the adjusting member 3. The second guide groove 3b may also be a blind groove, i.e. not extending through the outer surface of the adjusting member 3.

In this embodiment, the second guide groove 3b of the adjusting member 3 is used for constraining the second shaft 7, so that when the second shaft 7 moves along the second guide groove 3b, the second shaft 7 is close to or away from the first shaft 6, that is, the distance between the first shaft 6 and the second shaft 7 is adjusted, the second shaft 7 is disposed on the first rod 1, so that when the distance between the first shaft 6 and the second shaft 7 is changed, the first shaft 6 moves along the first guide groove 1c, so that the second rod 2 connected with the first shaft 6 moves relative to the first rod 1, thereby adjusting the relative positions of the first rod 1 and the second rod 2 in the length direction of the first rod 1, and further moving the bone cutting guide plate 20 connected with the first rod 1 up or down relative to the second rod 2, thereby achieving the purpose of adjusting the position of the bone cutting guide plate 20. The amount of change in the position of the second shaft 7 relative to the first shaft 6 as it moves along the second guide groove 3B is continuous, that is, the distance between the first shaft 6 and the second shaft 7 can be precisely controlled, so that when the osteotomy position of the osteotomy guide 20 relative to the tibia B is adjusted by the osteotomy amount adjustment device 10, a precise fine adjustment effect can be obtained.

The second guide groove 3b may be a circular arc groove. For example, in some embodiments, when the second guide groove 3b is a circular arc groove, as shown in fig. 8, the second guide groove 3b has a first end 3b1 and a second end 3b2 opposite to each other along the midline direction thereof, the distance r1 between the first end 3b1 and the first shaft 6 is 50mm, the distance r2 between the second end 3b2 and the first shaft 6 is 10mm, and r1 and r2 may have other values as long as they are not equal to each other. As shown in fig. 1, as the adjusting member 3 rotates relative to the second rod 2 about 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 is gradually reduced, and the first shaft 6 will move along the first guide groove 1c due to the fixed position between the second shaft 7 and the first rod 1. Due to the fixed position between the first shaft 6 and the second rod 2, the second rod 2 and the first rod 1 slide relatively along with the relative distance between the second shaft 7 and the first shaft 6, and the position of the osteotomy guide plate 20 is adjusted.

In some embodiments, as shown in fig. 8, the rotation range β of the adjusting member 3 around the first shaft 6 is 10 ° to 90 ° at the limit of the engagement between the second shaft 7 and the second guide groove 3 b.

It should be noted that the rotation amplitude β of the adjusting member 3 around the first shaft 6 refers to the angle of rotation of the adjusting member 3 when the second shaft 7 moves along the first end portion 3b1 of the second guide groove 3b to the second end portion 3b2 by driving the adjusting member 3 to rotate around the first shaft 6.

In this embodiment, the rotation range β of the adjusting member 3 around the first shaft 6 is controlled to be 10 ° to 90 °, so that when the adjusting member 3 adjusts the relative position of the first shaft 6 and the second shaft 7, a sufficient adjusting stroke is provided, so that the relative position of the first rod 1 and the second rod 2 can be accurately adjusted by adjusting the relative position between the first shaft 6 and the second shaft 7, so that the position of the osteotomy guide plate 20 can be accurately moved in a relatively large range, and the accurate control of the osteotomy amount is improved. If the rotation range β is less than 10 °, the inclination of the second guide groove 3b is too steep, and the adjustment of the relative position between the first shaft 6 and the second shaft 7 is changed too quickly when the adjustment member 3 is rotated, which is disadvantageous for accurate control of the osteotomy amount. If the rotation amplitude beta is greater than 90 deg., the volume of the adjusting member 3 is too large, which is not favorable for the compactness of the whole device.

Referring again to fig. 1, the osteotomy amount adjusting device 10 includes a stopper 4, the stopper 4 can move along the length direction of the second rod 2 to abut against the adjusting member 3 to limit the rotation of the adjusting member 3 around the first shaft 6, and the stopper 4 can move along the length direction of the second rod 2 away from the adjusting member 3 to release the abutting limit of the adjusting member 3.

In this embodiment, the position of the adjusting member 3 can be locked by the stopper 4 so that the adjusting member 3 maintains the relative positions of the first shaft 6 and the second shaft 7, and thus the first pin 1 and the second pin 2 are fixed to each other to stably support the bone cutting guide 20. When the position of the bone cutting guide 20 needs to be adjusted, the relative positions of the first rod 1 and the second rod 2 can be adjusted by rotating the adjusting member 3 around the axis of the first shaft 6 by only moving the stop 4 away so that the stop 4 releases the position lock of the adjusting member 3.

As shown in fig. 1, 7 and 9, the adjusting member 3 is provided with a toothed edge 3a, the stop member 4 comprises a main body portion 4b and a locking tooth 4a positioned on the main body portion 4b, when the stop member 4 moves along the length direction of the second rod 2 and the adjusting member 3 is abutted, the locking tooth 4a is matched with the toothed edge 3a, so that the position of the adjusting member 3 is locked, the adjusting member 3 cannot rotate around the first shaft 6 relative to the second rod 2, and the relative positions of the first shaft 6 and the second shaft 7 are locked, so as to fix the position of the osteotomy guide plate 20. When the position of the bone cutting guide plate 20 needs to be adjusted, the stop piece 4 only needs to be moved away from the adjusting piece 3 along the length direction of the second rod 2, so as to release the locking teeth 4a from being matched with the toothed edge 3 a.

The meshing teeth of the toothed edge 3a are arranged in a circular arc shape along the circumferential direction of the first shaft 6, so that no matter where the adjusting piece 3 rotates around the axis of the first shaft 6, the locking teeth 4a can be stably meshed with the corresponding meshing teeth, and the locking stability of the position of the adjusting piece 3 is improved.

In some embodiments, the tooth tip radius R of the toothed edge 3a is 15mm to 60mm, such as 15mm, 25mm, 35mm, 45mm, 55mm, or 60 mm. By controlling the tooth crest radius R of the toothed edge 3a to 15mm to 60mm, the distance from the toothed edge 3a of the adjusting member 3 to the axis of the first shaft 6 is made sufficiently large so that when the second guide groove 3b is provided, the displacement amount of the second guide groove 3b with respect to the movement of the second shaft 7 with respect to the first shaft 6 can be set sufficiently large to increase the adjustment range of the osteotomy amount. At the same time, the volume of the adjusting member 3 is not so large as to be detrimental to the compactness of the entire device.

Referring to fig. 1 and 9, the stopper 4 is annular, and the stopper 4 is sleeved on the first rod 1 or the second rod 2.

In some embodiments, the osteotomy amount adjustment device 10 includes an elastic member, such as an elastic body like a spring or rubber, or the like. The elastic piece is arranged between the first rod piece 1 and the stop piece 4 or between the second rod piece 2 and the stop piece 4 and is used for elastically abutting the stop piece 4 against the adjusting piece 3. The elastic member is arranged between the first rod member 1 and the stop member 4, namely, one end of the elastic member is fixedly connected or abutted with the first rod member 1, and the other end of the elastic member is fixedly connected or abutted with the stop member 4. The elastic member is set to a compressed state or a stretched state as necessary.

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 supports the stopper 4 against the adjusting member 3.

The first bar 1 or the second bar 2 is provided with a holding surface, such as a stepped groove or a stepped surface. Taking the second rod 2 as an example, as shown in fig. 6, the second rod 2 includes two sections of shaft bodies 2a and 2b connected to each other and having different radial dimensions, so that a step surface is formed on a connection surface of the two sections of shaft bodies 2a and 2b, and optionally, the step surface is recessed in a direction away from the shaft body 2a to form a step groove. The spring 5 is accommodated in the stepped groove and abuts against the bottom surface of the groove, so that the spring 5 does not excessively protrude out of the surface of the second rod 2, and the osteotomy amount adjusting device 10 is compact and small in overall structure. 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 against or be fixedly connected with the abutting surface, for example, a flange arranged on the first rod member 1 or the second rod member 2 may also be used, and in this case, the first rod member 1 or the second rod member 2 does not need to be provided with two sections with different thicknesses. Taking fig. 1 as an example, when the abutting surface is on the left side of the stopper 4, the elastic member is set in a stretching state; when the abutting surface is arranged at the right side of the stop piece 4, the elastic piece is set to be in a compressed state.

Referring to fig. 1 and 7, the adjusting member 3 may be a mirror-symmetric structure, and a clearance 304 is formed for the second rod 2 to pass through, so that when the adjusting member 3 is mounted to the first rod 1, two opposite sides of the first rod 1 are respectively provided with a corresponding second guide groove 3b, a second shaft 7, and the like, so that the assembly between the adjusting member 3 and the first rod 1 and the second rod 2 is more stable.

It is understood that the mirror symmetry of the adjusting member 3 is not essential, and as long as the adjusting member 3 can be rotatably connected to the second rod 2 through the first shaft 6 and the second guide groove 3b is provided to guide the second shaft 7 to move closer to or away from the first shaft 6 during sliding, the adjustment of the relative distance between the first shaft 6 and the second shaft 7 can be realized, so that the first rod 1 and the second rod 2 can relatively move along the length direction of the first rod 1, and the position of the osteotomy guide plate 20 can be adjusted.

Referring to fig. 7, the adjusting member 3 having a mirror symmetry structure includes a first guide plate 301 and a second guide plate 302 arranged at an interval, the first guide plate 301 and the second guide plate 302 are connected by two connecting arms 303 arranged at an interval, the two connecting arms 303 and the first guide plate 301 and the second guide plate 302 enclose to form a space 304, when the adjusting member 3 is mounted on the first rod member 1, the first guide plate 301 and the second guide plate 302 are respectively located at two sides of the first rod member 1, and the second rod member 2 passes through the space 304 and is matched with the first rod member 1.

At least one of the first guide vane 301 and the second guide vane 302 is provided with a second guide groove 3b, and the second shaft 7 connected with the first rod member 1 is in sliding fit with the second guide groove 3b on the corresponding side, so that the second shaft 7 can be close to or far away from the first shaft 6 in the sliding process along the second guide groove 3b, and the distance between the first shaft 6 and the second shaft 7 can be adjusted.

It will be appreciated that in the embodiment in which the adjusting member 3 comprises the first guide tab 301 and the second guide tab 302, the first guide tab 301 and the second guide tab 302 are both rotatably connected to the second rod member 2 with the axes of rotation coaxial, thereby enabling the adjusting member 3 to rotate relative to the second rod member 2. The rotation between the first guide vane 301, the second guide vane 302 and the second rod 2 can be performed by using the same first shaft 6, so as to enhance the stability of the adjusting member 3 in adjusting the position between the first rod 1 and the second rod 2. In other embodiments, a different first shaft 6 may be adopted as long as the first shaft 6 connected to the first guide vane 301 and the second guide vane 302 is coaxially disposed. Correspondingly, in the embodiment where the adjusting member 3 is provided with the shaft hole 3c, the shaft hole 3c may be provided on any one of the first guide vane 301 and the second guide vane 302, or the shaft holes 3c may be provided on both the first guide vane 301 and the second guide vane 302.

In this embodiment, the toothed edge 3a of the adjusting member 3 may be located on one of the first guide plate 301 and the second guide plate 302, or the first guide plate 301 and the second guide plate 302 may be provided with the toothed edge 3a, as long as the locking teeth 4a on the stop member 4 can engage with the corresponding toothed edge 3a to achieve a locking effect on the adjusting member 3. For example, as shown in fig. 7 and 9, when the 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 stop member 4, and the two locking teeth 4 correspond to the toothed edges 3a on the first guide piece 301 and the second guide piece 302, respectively, so that when the stop member 4 locks the position of the adjusting member 3, the structural arrangement can effectively improve the locking stability. In this embodiment, the stop member 4 may be provided with only one locking tooth 4, as long as the locking tooth 4 can cooperate with the toothed edge 3a of one of the first guide piece 301 and the second guide piece 302 to lock the adjusting member 3.

It should be noted that the arrangement position and the structural form of the stop member 4 may be other situations.

For example, when the first shaft 6 is rotatably coupled to the shaft hole 3c of the adjuster 3, the stopper 4 is provided between the first shaft 6 and the adjuster 3 and is used to selectively lock or release the degree of freedom of rotation of the adjuster 3 about the first shaft 6, thereby enabling the position of the adjuster 3 to be locked or released.

For another example, in other embodiments, the stop member 4 is movably disposed on the adjusting member 3 and is used to selectively lock or release the freedom of movement of the second shaft 7 along the second guide groove 3 b.

The structure of the stop members 4 and the positions of the stop members are not limited herein, as long as the stop members 4 can selectively lock or release the corresponding adjusting members 3, so that the adjusting members 3 cannot rotate relative to the second rod member 2 when locked.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (11)

1. An osteotomy amount adjusting device, comprising:

the first rod piece is provided with a first guide groove, and the first guide groove extends along the length direction of the first rod piece approximately;

the second rod piece is connected with the first rod piece, a first shaft is connected onto the second rod piece, and the first shaft is inserted into the first guide groove and can move along the first guide groove;

the adjusting piece is connected with the second rod piece in a rotating mode through the first shaft, a second guide groove is formed in the adjusting piece, the first rod piece is provided with a second shaft, the second shaft is inserted into the second guide groove, and when the adjusting piece rotates around the first shaft relative to the first rod piece, the second shaft moves along the second guide groove and is close to or far away from the first shaft so as to adjust the relative position of the first rod piece and the second rod piece in the length direction of the first rod piece.

2. The osteotomy amount adjusting device according to claim 1, wherein the first rod member defines an insertion cavity, the first guide groove extends through a sidewall of the insertion cavity to communicate with the insertion cavity, and the second rod member is inserted into the insertion cavity in a retractable manner.

3. The osteotomy amount adjusting device of claim 1, comprising a stopper movable along a length direction of the second rod member to abut against the adjusting member to restrict the adjusting member from rotating about the first axis, and being movable along the length direction of the second rod member away from the adjusting member to release the abutting limit of the adjusting member.

4. The osteotomy amount adjusting device of claim 3, wherein said adjuster is provided with a toothed edge, said stopper having a locking tooth, said locking tooth cooperating with said toothed edge.

5. The osteotomy amount adjusting device of claim 4, wherein the engaging teeth of the toothed edge are arranged in a circular arc shape in a circumferential direction of the first shaft.

6. The osteotomy amount adjusting device of claim 5, wherein a crest radius of the toothed edge is 15mm to 60 mm.

7. The osteotomy amount adjusting device of any one of claims 3-6, comprising an elastic member disposed between the first rod and the stopper, or between the second rod and the stopper.

8. The osteotomy amount adjusting device of claim 7, wherein the resilient member is a spring, the spring is sleeved on the first rod or the second rod, and resiliently urges the stopper against the adjusting member.

9. The osteotomy amount adjusting device of claim 8, wherein the first rod or the second rod is provided with a contact surface, and the spring contacts the contact surface.

10. The osteotomy amount adjusting device of claim 9, wherein said second guide groove has a different radius in each arc from a center of an intersection of said first axis and said adjusting member.

11. A tibial osteotomy system comprising the osteotomy amount adjustment device of any one of claims 1-10, an osteotomy guide having an osteotomy slot therethrough on opposite sides thereof, and an ankle cinching device for securing to a lower limb of a patient, one of said first and second rods being connected to said osteotomy guide and the other being connected to said ankle cinching device.

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