Disclosure of Invention
The invention mainly aims to provide a joint soft tissue balance measuring device which is used for solving the problem of poor accuracy of measuring force on soft tissues in the related technology.
The invention provides a joint soft tissue balance measuring device which comprises a base body, a propping piece, a transmission structure and a torsion screw driver, wherein the propping piece is movably arranged on the base body, graduation marks are arranged on the side wall of the propping piece, the transmission structure is arranged between the base body and the propping piece, the torsion screw driver is connected with the transmission structure and drives the propping piece to move up and down through the transmission structure, the torsion screw driver comprises an indicating disc and an indicating needle, and graduations for calibrating stress values of the propping piece are arranged on the indicating disc.
Further, the transmission structure comprises a gear part, a first rack part and a second rack part, the gear part is meshed with the first rack part and the second rack part, the gear part is movably arranged between the first rack part and the second rack part, the first rack part is arranged on the base body, the second rack part is arranged on the propping piece, and the gear part is connected with the torsion screwdriver.
Further, the torsion screwdriver comprises an indicating disc and an indicating needle, and scales for calibrating the stress value of the propping piece are arranged on the indicating disc.
Further, the base member includes the bottom plate and sets up the first bulge on the bottom plate, and the piece is supported including supporting the kicking block and setting up the recess on supporting the kicking block, and first bulge is located in the recess, and gear portion is located between the lateral wall of first bulge and the cell wall of recess, and first rack portion sets up on the lateral wall of first bulge towards gear portion, and second rack portion sets up on the cell wall of recess towards gear portion.
Further, the base body comprises a bottom plate and a coaming arranged on the bottom plate, the propping piece is positioned in the coaming, and the transmission structure is positioned between the bottom plate and the propping piece.
Further, a first guide plane is arranged on the inner wall of the coaming, and a second guide plane in contact fit with the first guide plane is arranged on the outer wall of the propping piece.
Further, the propping piece comprises a propping block and a second protruding portion arranged on the bottom of the propping block, a part of the second rack portion is located on the second protruding portion, and an avoidance portion capable of avoiding the second protruding portion is arranged on the base body.
Further, the joint soft tissue balance measuring device further comprises an anti-falling structure, the anti-falling structure is arranged between the base body and the propping piece, the anti-falling structure comprises a stopping piece and a stopping groove matched with the stopping piece, the stopping piece is arranged on the base body, and the stopping groove is arranged on the propping piece.
Further, scale marks are arranged on the side wall of the propping piece.
Further, the joint soft tissue balance measuring device further comprises a holding piece, and the holding piece is connected to the base body.
Further, the groove penetrates through two opposite side surfaces of the supporting block.
By applying the technical scheme of the application, the joint soft tissue balance measuring device comprises a base body, a propping piece and a transmission structure. The propping piece is movably arranged on the base body, and scale marks are arranged on the side wall of the propping piece. The transmission structure is arranged between the base body and the propping piece. The torsion screwdriver is connected with the transmission structure and drives the propping piece to move up and down through the transmission structure, the torsion screwdriver comprises an indication disc and an indication needle, and scales for calibrating stress values of the propping piece are arranged on the indication disc. In knee joint replacement, after the distal bone cuts of femur and tibia are completed, the joint soft tissue balance measuring device is implanted into the osteotomy gap between femur and tibia, the torsion screw driver is rotated, and the torsion screw driver drives the transmission structure to rotate. Under the action of the transmission structure, the propping piece moves upwards until the bone cutting gap is filled, so that the propping piece is in contact fit with the bone cutting surface of the femoral condyle, the numerical value on the indication disc of the torsion screw driver is zero at the moment, when the torsion screw driver is continuously rotated, the propping piece applies propping force to the bone cutting surface of the femoral condyle, the propping piece firstly overcomes the gravity of the joint and then gradually moves upwards and lifts the ligament until the ligament and surrounding soft tissues are tensioned, if the propping piece is continuously applied with force, the indication numerical value of the indication needle of the torsion screw driver also gradually rises, the propping force reflects the traction force of the ligament and surrounding soft tissues, and the traction force and the propping force are a pair of acting force reaction forces, and the two values are equal. In the process, according to the scale marks on the side wall of the propping piece, the upward moving distance of the propping piece can be known, and at the moment, the indication value of the indication needle on the indication disc is observed, wherein the indication value is the traction force of the soft tissue. After the traction force of the soft tissues of the medial collateral ligament and the lateral collateral ligament is obtained, whether the loosening degree of the knee joint soft tissues needs to be adjusted can be intuitively and accurately judged according to the traction force of the two areas and the upward moving distance of the propping piece. If necessary, the degree of loosening of the knee joint soft tissue is balanced. Therefore, the technical scheme of the application effectively solves the problem of poor accuracy of measuring the force of the soft tissue in the related technology.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a schematic perspective view showing a first view angle of an abutment member of an embodiment of a soft tissue balance measuring device according to the present invention as it extends out of a base body;
FIG. 2 is a schematic front view of the abutment of the soft tissue balance measuring device of FIG. 1 extending out of the base;
FIG. 3 is a schematic cross-sectional view of the abutment of the soft tissue balance measurement device of FIG. 1 extending out of the base;
FIG. 4 is a schematic perspective view showing a second view of the abutment of the soft tissue balance measuring device of FIG. 1 extending out of the base;
FIG. 5 is a schematic perspective view showing a third view of the abutment of the soft tissue balance measuring device of FIG. 1 extending out of the base;
FIG. 6 is a schematic perspective view of the abutment of the soft tissue balance measuring device of FIG. 1 at a first view angle when the abutment is not extended out of the base body;
FIG. 7 is a schematic front view of the abutment of the soft tissue balance measurement device of FIG. 1 without extending beyond the base;
FIG. 8 is a schematic cross-sectional view of the abutment of the soft tissue balance measurement device of FIG. 1 without extending out of the base;
FIG. 9 is a schematic perspective view showing a second view of the abutment of the soft tissue balance measuring device of FIG. 1 when the abutment is not extended out of the base body;
FIG. 10 is a schematic perspective view of the abutment of the soft tissue balance measuring device of FIG. 1 from a third perspective without extending out of the base;
FIG. 11 is a schematic perspective view showing a first view of the base of the articulating soft tissue balance measurement device of FIG. 1;
FIG. 12 is a schematic front view of a base of the joint soft tissue balance measurement device of FIG. 11;
FIG. 13 shows a schematic top view of the base of the joint soft tissue balance measurement device of FIG. 11;
FIG. 14 is a schematic perspective view showing a second view of the base of the soft tissue balance measurement device of FIG. 1;
FIG. 15 is a schematic perspective view showing a third view of the base of the soft tissue balance measurement device of FIG. 1;
FIG. 16 is a schematic perspective view of a first view of an abutment of the soft tissue balance measurement device of FIG. 1;
FIG. 17 shows a schematic front view of an abutment of the soft tissue balance measurement device of FIG. 16;
FIG. 18 is a schematic perspective view of a second view of an abutment of the soft tissue balance measurement device of FIG. 1;
FIG. 19 is a schematic perspective view of a third view of an abutment of the soft tissue balance measurement device of FIG. 1;
FIG. 20 is a schematic perspective view showing the gear portion of the soft tissue balance measuring device of FIG. 1 in a coupled state with a torque screwdriver;
FIG. 21 is a schematic perspective view showing a gear portion of the joint soft tissue balance measuring device of FIG. 1;
FIG. 22 is a schematic perspective view of a torque driver of the soft tissue balance measuring device of FIG. 1;
FIG. 23 is a graph showing the torque value versus pressure value of the torque screwdriver of the soft tissue balance measuring device of FIG. 1, and
Fig. 24 is a schematic view showing the construction of a torsion screwdriver of the joint soft tissue balance measuring device of fig. 1.
Wherein the above figures include the following reference numerals:
1. the hand grip, 2, the indicating disc, 3, the indicating needle, 6, the sleeve rod, 10, the basal body, 11, the first guiding plane, 12, the bottom plate, 13, the first protruding part, 14, the avoiding part, 15, the dividing line, 16, the coaming, 20, the propping piece, 21, the second guiding plane, 22, the propping block, 23, the groove, 24, the second protruding part, 25, the scale mark, 30, the transmission structure, 31, the gear part, 32, the first rack part, 33, the second rack part, 40, the torsion screwdriver, 50, the anti-falling structure, 51, the stopping piece, 52, the stopping groove, 60 and the holding piece.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
As shown in fig. 1 to 10, the joint soft tissue balance measuring device of the present embodiment includes a base body 10, an abutment 20, and a transmission structure 30. The abutment 20 is movably arranged on the base body 10, and graduation marks 25 are arranged on the side wall of the abutment 20. The transmission structure 30 is arranged between the base body 10 and the abutment 20. The torque screwdriver 40 is connected with the transmission structure 30 and drives the propping piece 20 to move up and down through the transmission structure 30, the torque screwdriver 40 comprises an indication disc 2 and an indication needle, and scales for calibrating the stress value of the propping piece 20 are arranged on the indication disc 2.
By applying the technical scheme of the embodiment, the torsion screwdriver 40 is connected with the transmission structure 30 and drives the propping piece 20 to move up and down through the transmission structure 30, the torsion screwdriver 40 comprises an indication disc 2 and an indication needle 3, and the indication disc 2 is provided with scales for calibrating the stress value of the propping piece 20. In knee joint replacement, after the distal bone cuts of the femur and tibia are completed, the soft tissue balance measuring device is implanted into the osteotomy gap between the femur and tibia, the torsion screw driver 40 is rotated, and the torsion screw driver 40 drives the transmission structure 30 to rotate. Under the action of the transmission structure 30, the propping piece 20 moves upwards until the bone cutting gap is filled, so that the propping piece 20 is in contact fit with the bone cutting surface of the femoral condyle, the numerical value on the indication disc 2 of the torsion screw driver 40 is zero at the moment, when the torsion screw driver 40 is continuously rotated, the propping piece 20 applies propping force to the bone cutting surface of the femoral condyle, the propping piece 20 firstly overcomes the gravity of the joint and then gradually moves upwards and lifts the ligament until the ligament and surrounding soft tissues are tensioned, if the propping piece 20 continues to apply force, the indication numerical value of the indication needle of the torsion screw driver also gradually rises, the propping force reacts the traction force of the ligament and the surrounding soft tissues, and the traction force and the propping force are a pair of acting force reaction forces, and the two values are equal. In this process, the distance of the upward movement of the abutment 20 is known from the graduation marks 25 on the side wall of the abutment 20, and the indication value of the indicator needle 3 on the indicator disc 2, which is the traction force of the soft tissue, is observed. After the traction force of the soft tissues of the medial collateral ligament and the lateral collateral ligament is obtained, whether the loosening degree of the soft tissues of the knee joint needs to be adjusted or not can be intuitively and accurately judged according to the traction force of the two areas and the upward moving distance of the propping piece 20, and the loosening degree of the soft tissues of the knee joint is balanced when the loosening degree of the soft tissues of the knee joint needs to be adjusted. Therefore, the technical scheme of the embodiment effectively solves the problem of poor accuracy of measuring the force of the soft tissue in the related technology.
As shown in fig. 3 and 8, in the present embodiment, the transmission structure 30 includes a gear portion 31, a first rack portion 32, and a second rack portion 33. The gear portion 31 is engaged with the first rack portion 32 and the second rack portion 33, and the gear portion 31 is movably disposed between the first rack portion 32 and the second rack portion 33. The first rack portion 32 is provided on the base body 10, the second rack portion 33 is provided on the abutment 20, and the gear portion 31 is connected to the torque driver 40. When the torque driver 40 screws the gear portion 31, the gear portion 31 is movable up and down by the first rack portion 32 and the second rack portion 33, and drives the abutment 20 to translate up and down along the first rack portion 32 on the base 10. In this way, the meshing of the gear portion 31 with the first rack portion 32 and the second rack portion 33 enables the abutting piece 20 to be smoothly translated up and down, and has an accurate transmission ratio with high transmission accuracy. Of course, in embodiments not shown in other figures, the transmission structure may also be a chain transmission, a belt transmission, a worm transmission.
As shown in fig. 1 and 20 to 22, in the present embodiment, the torque screwdriver 40 includes an indicator disc 2 and an indicator needle, and a scale for calibrating the stress value of the abutment 20 is provided on the indicator disc 2. It should be noted that the torque screwdriver is also called as a torque screwdriver, and is a common tool in the prior art. The application refers to the corresponding structure of the torsion screwdriver and improves the scale on the indication disc of the torsion screwdriver. Specifically, referring to fig. 24, the torque screwdriver includes a socket rod 6, an indicating plate 2, an indicating needle 3, and a handle 1. The indicating plate 2 is fixedly connected with the sleeve rod 6, and the handle 1 is fixedly connected with the indicating needle 3. The sleeve rod 6 and the handle 1 are hollow and nested, and the interiors of the sleeve rod and the handle are connected through torsion springs. The sleeve rod 6 is connected with the transmission structure 30, and the handle 1 drives the transmission structure 30 to drive the propping piece 20 to move. When the propping piece 20 applies a propping force to the femoral condyle osteotomy surface, the torsion spring deforms to push the indicator needle 3 to move, so that the handle 1 can rotate relative to the sleeve rod 6 and the indicator disc 2 with the indicator needle 3, the indicator needle 3 stays on a certain value on the indicator disc, and traction force is obtained through indication of the indicator needle 3 on the indicator disc. The specific structure of the torsion screwdriver can refer to a dial type torsion screwdriver with an authorized bulletin number of CN203993676U or a measuring device for detecting the tightness of a steel wire rope with an authorized bulletin number of CN 207540706U.
The torque value is displayed on the dial of the torque screwdriver in the prior art, and the torque value is converted into the pressure value by improving the torque value. The torque value may be converted to a pressure value by a mechanical testing machine, which is calibrated on the indicator disc 2 to form a scale showing the force value of the abutment 20. Specifically, fig. 23 shows a correspondence relationship between a torque value and a pressure value, with the horizontal axis representing the torque value and the vertical axis representing the pressure value. Namely 0.2, 0.4, 0.8, 1.3, 3.2 on the original dial plate 3.4 was modified to 45.00, 77.00, 97.00, 132.00. Of course, the above values are only one embodiment, and the scales may be different due to specific structural differences and materials.
The abutment 20 of the joint soft tissue balance measuring device of this embodiment may be fitted with a mechanical testing machine, and the handle 1 is twisted so that the indicator needle 3 indicates to 0.2, 0.4, 0.8, 1. In this way, the application makes the indication disc 2 of the torsion screw driver 40 directly display the pressure value of the traction force of the soft tissue, and more intuitively reflects the value of the traction force of the soft tissue on the inner side or the outer side of the knee joint.
The sleeve rod 6 of the torque screwdriver 40 in this embodiment is a hexagonal prism, and the gear portion 31 is provided with a hexagonal hole matched with the hexagonal prism, and the hexagonal prism is in plug-in fit with the hexagonal hole, so that the connection is convenient.
As shown in fig. 3, 8, 12 and 19, in the present embodiment, the base 10 includes a base plate 12 and a first protruding portion 13 provided on the base plate 12, and the abutment member 20 includes an abutment block 22 and a groove 23 provided on the abutment block 22. The first projection 13 is located in the groove 23, and the gear portion 31 is located between the side wall of the first projection 13 and the wall of the groove 23. The first rack portion 32 is provided on a side wall of the first projecting portion 13 facing the gear portion 31, and the second rack portion 33 is provided on a wall of the groove 23 facing the gear portion 31. The recess 23 is provided so as to be able to avoid the first protruding portion 13, so that the first protruding portion 13 is inserted into the recess 23. The gear portion 31 is located between the sidewall of the first protrusion 13 and the wall of the groove 23 so that the joint soft tissue balance measuring device is compact and simple in structure, occupies a small space, and is convenient to operate.
As shown in fig. 8 and 11 to 15, in the present embodiment, the base 10 includes a base plate 12 and a shroud 16 provided on the base plate 12. The abutment 20 is located inside the shroud 16 and the drive structure 30 is located between the base plate 12 and the abutment 20. The coaming 16 can define a range of motion of the abutment 20, preventing the abutment 20 from disengaging from the coaming 16 in a horizontal direction.
As shown in fig. 3, 5, 8 and 14, in the present embodiment, a first guiding plane 11 is provided on the inner wall of the coaming 16, and a second guiding plane 21 that is in contact fit with the first guiding plane 11 is provided on the outer wall of the abutment member 20. The contact engagement of the first guide plane 11 with the second guide plane 21 can make the movement of the abutment member 20 within the coaming 16 smoother on the one hand, and can prevent the abutment member 20 from rotating relative to the coaming 16 on the other hand.
As shown in fig. 3, 8, 10, 13, 15 to 19, in the present embodiment, the abutment 20 includes an abutment block 22 and a second projection 24 provided on the bottom of the abutment block 22. A part of the second rack portion 33 is located on the second projecting portion 24, and the base 10 is provided with the escape portion 14 capable of escaping from the second projecting portion 24. The arrangement of the second protruding portion 24 can increase the height of the abutment block 22 while maintaining the compactness of the overall structure, so that the arrangement length of the first rack portion 32 can extend over the second protruding portion 24, and further the gear portion 31 has a sufficient lifting height to increase the movement range of the abutment block 22. Meanwhile, the avoidance portion 14 can avoid the second protruding portion 24, and when the moving range of the abutment block 22 is increased, interference between the second protruding portion 24 and the base 10 can be prevented. The relief portion 14 is provided on the bottom plate 12, and the relief portion 14 is a through hole, and both ends of the through hole penetrate through both upper and lower surfaces of the bottom plate 12, respectively.
In this embodiment, there are three second protrusions 24, and three avoidance portions 14, and the three second protrusions 24 are disposed in one-to-one correspondence with the three avoidance portions 14. A part of the above-described second rack portion 33 is arranged on one second projecting portion 24 located in the middle of the three second projecting portions 24. Of course, in the embodiment not shown in other figures, the number of the second protrusions is not limited to three, but may be one, two, four or more, and the number of the corresponding avoidance portions may be consistent with the number of the second protrusions.
As shown in fig. 1,6, 14 and 16, in the present embodiment, the joint soft tissue balance measuring device further includes an anti-drop structure 50, and the anti-drop structure 50 is disposed between the base body 10 and the abutment 20. The anti-drop structure 50 is provided to prevent the abutment 20 from being separated from the base body 10 in the event of an excessive upward movement of the abutment 20. The anti-falling structure 50 comprises a stop piece 51 and a stop groove 52 matched with the stop piece 51, the stop piece 51 is arranged on the base body 10, and the stop groove 52 is arranged on the propping piece 20. The stopper 51 is a pin penetrating the base 10. During the upward movement of the abutment 20, when the stopper 51 contacts the groove side wall of the stopper groove 52, this position is the limit position of the upward movement of the abutment 20. One end of the stop groove 52 of the present embodiment penetrates through the top surface of the abutment member 20, so that the top surface of the abutment member 20 can avoid the stop member 51, and the stop member 51 can conveniently penetrate into the stop groove 52 in the up-down direction.
As shown in fig. 2, 7, 16 and 17, graduation marks 25 are provided on the side wall of the abutment 20. The graduation marks 25 are provided to read the elevation of the abutment 20 and at the same time the overall height of the joint soft tissue balance measuring device.
As shown in fig. 2, 6, and 10 to 12, in the present embodiment, a plurality of score lines 15 are provided on the outer wall surface of the base body 10, and the plurality of score lines 15 are arranged on the base body 10 in the vertical direction. The setting of the score line 15 may be used as a reference line for the distance by which the score line 25 rises or falls or a reference line for the height by which the gear portion 31 moves.
As shown in fig. 1 to 15, in the present embodiment, the joint soft tissue balance measurement device further includes a grip 60, and the grip 60 is connected to the base 10. The provision of the grip 60 facilitates control of the base 10 to enable the base 10 to be maintained at a designated location in the osteotomy gap.
As shown in fig. 1,4, 9 and 19, in the present embodiment, a groove 23 penetrates both side surfaces of the abutment block 22 which are disposed opposite to each other. Thus, both ends of the groove 23 can avoid the shaft portion of the gear portion 31, wherein one end of the groove 23 can also avoid the torsion driver 40, so that the torsion driver 40 can pass through the abutment block 22.
As shown in fig. 2, 12, 17 and 21, the height H1 of the base 10 is about 15mm, the total moving height H2 of the pressing member 20 is 14mm to 25mm, the distance H3 between the top surface of the first projection 13 and the top surface of the base 10 is about 2mm, the width L of the base 10 is about 30mm, and the diameter of the shaft portion of the gear portion 31 is 4mm to 12mm. The above-mentioned dimensions enable the device for measuring balance of soft tissue of the joint to meet the dimensional requirements of osteotomy gap of knee joint replacement.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of the present invention, and the azimuth terms "inside and outside" refer to inside and outside with respect to the outline of each component itself.
Spatially relative terms, such as "above," "upper" and "upper surface," "above" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the process is carried out, the exemplary term "above" may be included. Upper and lower. Two orientations below. The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.