Joint soft tissue balance measurement device

Abstract

The present invention provides a joint soft tissue balance measurement device, comprising: a base; a push piece, movably arranged on the base, with scale lines arranged on the side wall of the push piece; a transmission structure, arranged between the base and the push piece; a torque screwdriver, connected to the transmission structure and driven by the transmission structure to move the push piece up and down, the torque screwdriver comprising an indicator plate and an indicator needle, and a scale for calibrating the force value of the push piece is arranged on the indicator plate. The technical solution of the present application effectively solves the problem of poor accuracy in measuring force on soft tissue in the related art.

Description

Technical Field

[0001] The present invention relates to the field of orthopedic medical instruments, and in particular to a joint soft tissue balance measuring device. Background Art

[0002] The knee joint is mainly composed of the femur, tibia and patella. The joint capsule is attached to the periphery of the articular cartilage of each bone. The joint capsule is reinforced by ligaments. The soft tissue of the knee joint is composed of the joint capsule, ligaments, muscles, tendons, nerves, blood vessels, etc.

[0003] With the advent of an aging society, knee joint disease has become a common disease that affects the quality of life of the elderly. Total knee replacement is an effective method for treating advanced knee joint disease. Total knee replacement refers to replacing a knee joint that has been severely damaged and cannot perform normal functions with an artificial prosthesis, thereby eliminating knee joint pain and restoring its stability and range of motion.

[0004] In total knee replacement, in order to install the artificial prosthesis, the femur and tibia need to be cut so that the cut bone contour can match the installation surface of the artificial prosthesis. For example, for the tibia, the cutting step mainly includes the cutting of the proximal end of the tibia (the end close to the heart); for the femur, the cutting step mainly includes the cutting of the distal end of the femur (the end away from the heart), and the osteotomy of the anterior condyle, posterior condyle, oblique surface and intercondylar of the femur. After the bone cutting of the femur and distal tibia is completed, an osteotomy gap is formed between the femur and tibia, and the entire replacement will enter a very critical step, namely, the balance of soft tissue around the knee. In order to obtain better long-term follow-up results, the accuracy of soft tissue balance is a goal that people continue to explore and pursue. In the related art, the total knee replacement is performed by intramedullary and extramedullary positioning osteotomy through a mechanical guide device, and then the doctor uses the naked eye, hand feel and experience to locate the anatomical landmarks, the force line of the lower limbs and the rotation axis of the prosthesis, and then manually marks the osteotomy, places the artificial prosthesis and balances the soft tissue. Although people are constantly improving the mechanical positioning function of surgical instruments for cutting bone tissue and improving the accuracy of implanting artificial prostheses into the cutting gap, compared with cutting bone tissue, there are no good supporting instruments for soft tissue balancing to help doctors locate, measure and correct. Soft tissue balancing usually relies on the doctor's experience and skills, and the accuracy of force measurement of soft tissue is poor. Whether the treatment is proper directly affects the postoperative joint function and stability. Summary of the invention

[0005] The main purpose of the present invention is to provide a joint soft tissue balance measurement device to solve the problem of poor accuracy in measuring the force of soft tissue in the related art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a joint soft tissue balance measuring device, comprising: a base; a push piece, which is movably arranged on the base, and the side wall of the push piece is provided with scale lines; a transmission structure, which is arranged between the base and the push piece; a torque screwdriver, which is connected to the transmission structure and drives the push piece to move up and down through the transmission structure, and the torque screwdriver includes an indicator disk and an indicator needle, and the indicator disk is provided with a scale for calibrating the force value of the push piece.

[0007] Furthermore, the transmission structure includes a gear portion, a first rack portion and a second rack portion, the gear portion is meshed with the first rack portion and the second rack portion, the gear portion is movably arranged between the first rack portion and the second rack portion, the first rack portion is arranged on the base, the second rack portion is arranged on the abutment, and the gear portion is connected to the torque screwdriver.

[0008] Furthermore, the torque screwdriver comprises an indicator plate and an indicator needle, and the indicator plate is provided with a scale for calibrating the force value of the abutting member.

[0009] Further, the base includes a bottom plate and a first protrusion arranged on the bottom plate, the abutting member includes a abutting block and a groove arranged on the abutting block, the first protrusion is located in the groove, the gear portion is located between the side wall of the first protrusion and the groove wall of the groove, the first rack portion is arranged on the side wall of the first protrusion facing the gear portion, and the second rack portion is arranged on the groove wall of the groove facing the gear portion.

[0010] Furthermore, the base includes a bottom plate and a surrounding plate arranged on the bottom plate, the abutting piece is located inside the surrounding plate, and the transmission structure is located between the bottom plate and the abutting piece.

[0011] Furthermore, a first guide plane is arranged on the inner wall of the enclosure, and a second guide plane contacting and cooperating with the first guide plane is arranged on the outer wall of the abutting member.

[0012] Further, the abutting member includes an abutting block and a second protruding portion arranged on the bottom of the abutting block, a part of the second rack portion is located on the second protruding portion, and an avoiding portion capable of avoiding the second protruding portion is arranged on the base.

[0013] Furthermore, the joint soft tissue balance measurement device also includes an anti-slip structure, which is arranged between the base and the abutment. The anti-slip structure includes a stopper and a stopper groove cooperating with the stopper. The stopper is arranged on the base, and the stopper groove is arranged on the abutment.

[0014] Furthermore, scale lines are arranged on the side wall of the abutting member.

[0015] Furthermore, the joint soft tissue balance measuring device also includes a gripping member connected to the base.

[0016] Furthermore, the groove runs through two oppositely disposed side surfaces of the abutting block.

[0017] By applying the technical solution of the present invention, a joint soft tissue balance measuring device includes: a base, a push piece and a transmission structure. The push piece is movably arranged on the base, and scale lines are arranged on the side wall of the push piece. The transmission structure is arranged between the base and the push piece. The torque screwdriver is connected to the transmission structure and drives the push piece to move up and down through the transmission structure. The torque screwdriver includes an indicator plate and an indicator needle, and the indicator plate is provided with a scale for calibrating the force value of the push piece. In knee replacement surgery, after completing the bone cutting of the distal end of the femur and tibia, the joint soft tissue balance measuring device is implanted in the osteotomy gap between the femur and the tibia, and the torque screwdriver is rotated, and the torque screwdriver drives the transmission structure to rotate. Under the action of the transmission structure, the push piece moves up until it fills the osteotomy gap, so that the push piece contacts and cooperates with the osteotomy surface of the femoral condyle. At this time, the value on the indicator disk of the torque screwdriver is zero; when the torque screwdriver continues to rotate, the push piece will apply a push force to the osteotomy surface of the femoral condyle. The push piece first overcomes the gravity of the joint and then gradually moves up and pulls the ligament until the ligament and surrounding soft tissue are tightened. If the push piece continues to apply force, the indicated value of the indicator needle of the torque screwdriver will gradually rise. The push force will reflect the tensile force of the ligament and surrounding soft tissue. The tensile force and the push force are a pair of action and reaction forces, and the two values ​​are equal. In this process, according to the scale lines on the side wall of the push piece, the distance the push piece moves up can be known. At this time, the indicated value of the indicator needle on the indicator disk is observed, and the indicated value is the tensile force of the soft tissue. After obtaining the traction force of the soft tissues in the medial collateral ligament and lateral collateral ligament regions, it is possible to intuitively and accurately judge whether it is necessary to adjust the degree of loosening of the soft tissues of the knee joint according to the traction force of the two regions and the distance the abutment member moves upward. If necessary, the degree of loosening of the soft tissues of the knee joint is balanced. Therefore, the technical solution of the present application effectively solves the problem of poor accuracy in measuring the force of soft tissues in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic diagram of the three-dimensional structure of the embodiment of the joint soft tissue balance measurement device according to the present invention when the abutting piece extends out of the base body from a first viewing angle is shown;

[0020] Figure 2 Shows Figure 1 A schematic front view of a joint soft tissue balance measuring device when a support member extends out of a base body;

[0021] Figure 3 Shows Figure 1A schematic cross-sectional view of a joint soft tissue balance measuring device when a support member extends out of a base body;

[0022] Figure 4 Shows Figure 1 A schematic diagram of the three-dimensional structure of the joint soft tissue balance measurement device from a second viewing angle when the supporting member extends out of the base body;

[0023] Figure 5 Shows Figure 1 A schematic diagram of a three-dimensional structure of a joint soft tissue balance measuring device when a support member extends out of a base body from a third perspective;

[0024] Figure 6 Shows Figure 1 A schematic diagram of a three-dimensional structure of a joint soft tissue balance measurement device from a first perspective when the abutting piece does not extend out of the base;

[0025] Figure 7 Shows Figure 1 A schematic front view of the joint soft tissue balance measuring device when the abutting piece does not extend out of the base body;

[0026] Figure 8 Shows Figure 1 A schematic cross-sectional view of a joint soft tissue balance measuring device when the abutting piece does not extend out of the base body;

[0027] Fig. 9 Shows Figure 1 A schematic diagram of the three-dimensional structure of the joint soft tissue balance measurement device from a second viewing angle when the supporting member does not extend out of the base body;

[0028] Fig.10 Shows Figure 1 A schematic diagram of the three-dimensional structure of the joint soft tissue balance measurement device from a third perspective when the supporting member does not extend out of the base body;

[0029] Fig.11 Shows Figure 1 A schematic diagram of a three-dimensional structure of a base of a joint soft tissue balance measurement device from a first perspective;

[0030] Fig.12 Shows Fig.11 A schematic front view of a base of a joint soft tissue balance measuring device;

[0031] Fig.13 Shows Fig.11 A schematic top view of a base of a joint soft tissue balance measuring device;

[0032] Fig.14 Shows Figure 1 A schematic diagram of a three-dimensional structure of a base of a joint soft tissue balance measurement device from a second viewing angle;

[0033] Fig.15 Shows Figure 1 A schematic diagram of a three-dimensional structure of a base of a joint soft tissue balance measurement device from a third perspective;

[0034] Fig.16 Shows Figure 1 A schematic diagram of the three-dimensional structure of the support member of the joint soft tissue balance measurement device from a first perspective;

[0035] Fig.17 Shows Fig.16 A schematic front view of an abutment member of a joint soft tissue balance measuring device;

[0036] Fig.18 Shows Figure 1 A schematic diagram of the three-dimensional structure of the support member of the joint soft tissue balance measurement device from a second perspective;

[0037] Fig.19 Shows Figure 1 A schematic diagram of the three-dimensional structure of the support member of the joint soft tissue balance measurement device from a third perspective;

[0038] Fig. 20 Shows Figure 1 A schematic diagram of the three-dimensional structure of the joint soft tissue balance measuring device when the gear part and the torque screwdriver are connected;

[0039] Fig.21 Shows Figure 1 A schematic diagram of the three-dimensional structure of the gear part of the joint soft tissue balance measurement device;

[0040] Fig. 22 Shows Figure 1 A schematic diagram of the three-dimensional structure of a torque screwdriver of a joint soft tissue balance measurement device;

[0041] Fig.23 Shows Figure 1 A curve diagram showing the relationship between the torque value and the pressure value of the torque screwdriver of the joint soft tissue balance measuring device; and

[0042] Fig.24 Shows Figure 1 Schematic diagram of the structure of the torque screwdriver of the joint soft tissue balance measurement device.

[0043] The above drawings include the following reference numerals:

[0044] 1. Handle; 2. Indicator plate; 3. Indicator needle; 6. Sleeve rod; 10. Base; 11. First guide plane; 12. Bottom plate; 13. First protrusion; 14. Avoidance portion; 15. Scale line; 16. Enclosure; 20. Abutment; 21. Second guide plane; 22. Abutment block; 23. Groove; 24. Second protrusion; 25. Scale line; 30. Transmission structure; 31. Gear portion; 32. First rack portion; 33. Second rack portion; 40. Torque screwdriver; 50. Anti-slip structure; 51. Stopper; 52. Stopper groove; 60. Grip member. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0047] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0048] like Figures 1 to 10As shown, the joint soft tissue balance measuring device of this embodiment includes: a base 10, a push piece 20 and a transmission structure 30. The push piece 20 is movably arranged on the base 10, and a scale line 25 is arranged on the side wall of the push piece 20. The transmission structure 30 is arranged between the base 10 and the push piece 20. The torque screwdriver 40 is connected to the transmission structure 30 and drives the push piece 20 to move up and down through the transmission structure 30. The torque screwdriver 40 includes an indicator disk 2 and an indicator needle. The indicator disk 2 is provided with a scale for calibrating the force value of the push piece 20.

[0049] By applying the technical solution of this embodiment, the torque screwdriver 40 is connected to the transmission structure 30 and drives the abutment 20 to move up and down through the transmission structure 30. The torque screwdriver 40 includes an indicator disk 2 and an indicator needle 3. The indicator disk 2 is provided with a scale for calibrating the force value of the abutment 20. In knee replacement surgery, after the distal bone cutting of the femur and tibia is completed, the joint soft tissue balance measurement device is implanted in the osteotomy gap between the femur and tibia, and the torque screwdriver 40 is rotated to drive the transmission structure 30 to rotate. Under the action of the transmission structure 30, the push piece 20 moves up until it fills the osteotomy gap, so that the push piece 20 contacts and cooperates with the osteotomy surface of the femoral condyle. At this time, the value on the indicator disk 2 of the torque screwdriver 40 is zero; when the torque screwdriver 40 continues to rotate, the push piece 20 will apply a push force to the osteotomy surface of the femoral condyle. The push piece 20 first overcomes the gravity of the joint and then gradually moves up and pulls the ligament until the ligament and surrounding soft tissue are tightened. If the push piece 20 continues to apply force, the indicated value of the indicator needle of the torque screwdriver will gradually rise. The push force will reflect the tensile force of the ligament and surrounding soft tissue. The tensile force and the push force are a pair of action and reaction forces, and the two values ​​are equal. In this process, according to the scale line 25 on the side wall of the push piece 20, the distance that the push piece 20 moves up can be known. At this time, the indicated value of the indicator needle 3 on the indicator disk 2 is observed, and the indicated value is the tensile force of the soft tissue. After obtaining the tension of the soft tissues in the medial collateral ligament and the lateral collateral ligament, it is possible to intuitively and accurately determine whether the degree of release of the soft tissues of the knee joint needs to be adjusted according to the tension of the two areas and the distance the abutment member 20 moves upward, and if necessary, the degree of release of the soft tissues of the knee joint is balanced. Therefore, the technical solution of this embodiment effectively solves the problem of poor accuracy in measuring the force of soft tissues in the related art.

[0050] like Figure 3 and Figure 8As shown, in this 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 meshed with the first rack portion 32 and the second rack portion 33, and the gear portion 31 is movably arranged between the first rack portion 32 and the second rack portion 33. The first rack portion 32 is arranged on the base 10, and the second rack portion 33 is arranged on the abutting member 20, and the gear portion 31 is connected to the torque screwdriver 40. When the torque screwdriver 40 screws the gear portion 31, the gear portion 31 can move up and down under the action of the first rack portion 32 and the second rack portion 33, and at the same time drive the abutting member 20 to translate up and down along the first rack portion 32 on the base 10. In this way, the gear portion 31 is meshed with the first rack portion 32 and the second rack portion 33 so that the abutting member 20 can translate up and down smoothly, and has an accurate transmission ratio and high transmission accuracy. Of course, in other embodiments not shown in the figures, the transmission structure can also be a chain drive, a belt drive, or a worm drive.

[0051] like Figure 1 , Figure 20 to Figure 22 As shown, in this embodiment, the torque screwdriver 40 includes an indicator plate 2 and an indicator needle, and the indicator plate 2 is provided with a scale for calibrating the force value of the abutment 20. It should be noted that the torque screwdriver, also known as a torque screwdriver, is a commonly used tool in the prior art. The corresponding structure of the torque screwdriver is cited in this application, and the scale on the indicator plate of the torque screwdriver is improved. Specifically, refer to Fig.24 The torque screwdriver includes a sleeve rod 6, an indicator disk 2, an indicator needle 3 and a handle 1. The indicator disk 2 is fixedly connected to the sleeve rod 6, and the handle 1 is fixedly connected to the indicator needle 3. The sleeve rod 6 and the handle 1 are hollow structures and nested, and the interiors of the two are connected by a torsion spring. The sleeve rod 6 is connected to the transmission structure 30, and the transmission structure 30 is driven by the handle 1 to drive the push piece 20 to move. When the push piece 20 applies a push force to the osteotomy surface of the femoral condyle, the torsion spring is deformed and pushes the indicator needle 3 to move, so that the handle 1 will rotate with the indicator needle 3 relative to the sleeve rod 6 and the indicator disk 2, so that the indicator needle 3 stays at a certain value on the indicator disk, and the tension is obtained by the indication of the indicator needle 3 on the indicator disk. The specific structure of the torque screwdriver can refer to the dial-type torque screwdriver with the authorization announcement number CN203993676U or the measurement device for detecting the tightness of the wire rope with the authorization announcement number CN207540706U.

[0052] The dial of the torque screwdriver in the prior art displays the torque value, and the present application makes an improvement here, converting the torque value into a pressure value. The torque value can be converted into a pressure value by a mechanical testing machine, and the pressure value can be calibrated on the indicator disk 2 to form a scale showing the force value of the abutment 20. Specifically, Fig.23The corresponding relationship between torque value and pressure value is shown, with the horizontal axis representing torque value and the vertical axis representing pressure value. That is, the original 0.2, 0.4, 0.8, 1...3, 3.2, 3.4 on the dial are changed to 45.00, 77.00, 97.00, 132.00...442.00, 446.00, 460.00. Of course, the above values ​​are only an embodiment, and the scales may be different due to specific structural differences and materials.

[0053] The abutment 20 of the joint soft tissue balance measuring device of this embodiment can be matched with a mechanical testing machine, and the handle 1 can be twisted so that the indicator needle 3 indicates 0.2, 0.4, 0.8, 1...3, 3.2, 3.4, and the corresponding pressure value can be obtained through the reading of the mechanical testing machine. In this way, the application enables the indicator disk 2 of the torque screwdriver 40 to directly display the pressure value of the soft tissue tension, which more intuitively reflects the value of the tension of the soft tissue on the inner or outer side of the knee joint.

[0054] The sleeve rod 6 of the torque screwdriver 40 of this embodiment is a hexagonal body, and the gear portion 31 is provided with a hexagonal hole that matches the hexagonal body. The hexagonal body and the hexagonal hole are plug-fitted together, so that the connection is convenient.

[0055] like Figure 3 , Figure 8 , Fig.12 and Fig.19 As shown, in this embodiment, the base 10 includes a bottom plate 12 and a first protrusion 13 arranged on the bottom plate 12, and the abutting member 20 includes an abutting block 22 and a groove 23 arranged on the abutting block 22. The first protrusion 13 is located in the groove 23, and the gear portion 31 is located between the side wall of the first protrusion 13 and the groove wall of the groove 23. The first rack portion 32 is arranged on the side wall of the first protrusion 13 facing the gear portion 31, and the second rack portion 33 is arranged on the groove wall of the groove 23 facing the gear portion 31. The arrangement of the groove 23 can avoid the first protrusion 13 so that the first protrusion 13 can be inserted into the groove 23. The gear portion 31 is located between the side wall of the first protrusion 13 and the groove wall of the groove 23, so that the joint soft tissue balance measurement device has a compact and simple structure, occupies less space, and is easy to operate.

[0056] like Figure 8 , Figures 11 to 15 As shown, in this embodiment, the base 10 includes a bottom plate 12 and a surrounding plate 16 disposed on the bottom plate 12. The abutting member 20 is located inside the surrounding plate 16, and the transmission structure 30 is located between the bottom plate 12 and the abutting member 20. The surrounding plate 16 can limit the range of movement of the abutting member 20 to prevent the abutting member 20 from being separated from the surrounding plate 16 in the horizontal direction.

[0057] like Figure 3 , Figure 5 , Figure 8 and Fig.14 As shown, in this embodiment, a first guide plane 11 is provided on the inner wall of the enclosure 16, and a second guide plane 21 is provided on the outer wall of the push member 20 to contact and cooperate with the first guide plane 11. The contact and cooperation between the first guide plane 11 and the second guide plane 21 can make the push member 20 move more smoothly in the enclosure 16 on the one hand, and can prevent the push member 20 from rotating relative to the enclosure 16 on the other hand.

[0058] like Figure 3 , Figure 8 , Fig.10 , Fig.13 , Figures 15 to 19 As shown, in this embodiment, the abutting member 20 includes an abutting block 22 and a second protruding portion 24 arranged on the bottom of the abutting block 22. A portion of the second rack portion 33 is located on the second protruding portion 24, and a avoiding portion 14 capable of avoiding the second protruding portion 24 is arranged on the base 10. The arrangement of the second protruding portion 24 can increase the height of the abutting block 22 while maintaining the compactness of the overall structure, so that the arrangement length of the first rack portion 32 can extend on the second protruding portion 24, and then the gear portion 31 has a sufficient lifting height to increase the moving range of the abutting block 22. At the same time, the arrangement of the avoiding portion 14 can avoid the second protruding portion 24, and when increasing the moving range of the abutting block 22, it can ensure that there is no interference between the second protruding portion 24 and the base 10. It should be noted that the avoiding portion 14 is arranged on the bottom plate 12, and the avoiding portion 14 is a through hole, and the two ends of the through hole respectively penetrate the upper and lower surfaces of the bottom plate 12.

[0059] In this embodiment, there are three second protruding portions 24 and three avoiding portions 14, and the three second protruding portions 24 are arranged one by one with the three avoiding portions 14. A part of the second rack portion 33 is arranged on the middle second protruding portion 24 among the three second protruding portions 24. Of course, in other embodiments not shown in the figures, the number of the second protruding portions is not limited to three, and can also be one, two, four or more, and the number of the corresponding avoiding portions can be consistent with the number of the second protruding portions.

[0060] like Figure 1 , Figure 6 , Fig.14 and Fig.16As shown, in this embodiment, the joint soft tissue balance measurement device also includes an anti-slip structure 50, which is arranged between the base 10 and the push piece 20. The anti-slip structure 50 can prevent the push piece 20 from detaching from the base 10 when the push piece 20 moves up too much. The anti-slip structure 50 includes a stopper 51 and a stopper groove 52 matched with the stopper 51, the stopper 51 is arranged on the base 10, and the stopper groove 52 is arranged on the push piece 20. The stopper 51 is a pin penetrated on the base 10. In the process of the push piece 20 moving up, when the stopper 51 contacts the groove side wall of the stopper groove 52, this position is the limit position of the push piece 20 moving up. One end of the stopper groove 52 of this embodiment passes through the top surface of the push piece 20, so that the top surface of the push piece 20 can avoid the stopper 51, so that the stopper 51 can penetrate into the stopper groove 52 in the up and down direction.

[0061] like Figure 2 , Figure 7 , Fig.16 and Fig.17 , a scale line 25 is arranged on the side wall of the abutting member 20. The scale line 25 can be arranged to read the rising height of the abutting member 20, and at the same time, the overall height of the joint soft tissue balance measuring device can be read.

[0062] like Figure 2 , Figure 6 , Figures 10 to 12 As shown, in this embodiment, a plurality of engraved lines 15 are arranged on the outer wall surface of the substrate 10, and the plurality of engraved lines 15 are arranged on the substrate 10 in the vertical direction. The setting of the engraved lines 15 can be used as a reference line for the rising or falling distance of the scale line 25 or a reference line for the moving height of the gear part 31.

[0063] like Figures 1 to 15 As shown, in this embodiment, the joint soft tissue balance measurement device further includes a gripping member 60, which is connected to the base 10. The provision of the gripping member 60 facilitates the control of the base 10, so that the base 10 can be maintained at a specified position in the osteotomy gap.

[0064] like Figure 1 , Figure 4 , Fig. 9 and Fig.19 As shown, in this embodiment, the groove 23 passes through two oppositely disposed side surfaces of the abutting block 22. In this way, both ends of the groove 23 can avoid the shaft portion of the gear portion 31, and one end of the groove 23 can also avoid the torque screwdriver 40, so that the torque screwdriver 40 can pass through the abutting block 22.

[0065] like Figure 2 , Fig.12 , Fig.17 and Fig.21As shown, the height H1 of the base 10 is about 15 mm, the total moving height H2 of the abutting member 20 is 14 mm to 25 mm, the distance H3 between the top surface of the first protrusion 13 and the top surface of the base 10 is about 2 mm, the width L of the base 10 is about 30 mm, and the diameter of the shaft of the gear part 31 is 4 mm to 12 mm. The above dimensions enable the joint soft tissue balance measurement device to meet the size requirements of the osteotomy gap of knee replacement.

[0066] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0067] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0068] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A joint soft tissue balance measurement device, characterized in that: include: A substrate (10); A push member (20) is movably arranged on the base (10), and a scale line (25) is arranged on the side wall of the push member (20); A transmission structure (30) is arranged between the base (10) and the abutting member (20); A torque screwdriver (40) is connected to the transmission structure (30) and drives the push member (20) to move up and down through the transmission structure (30), the torque screwdriver (40) comprising an indicator disk (2) and an indicator needle, the indicator disk (2) being provided with a scale for calibrating the force value of the push member (20), and the torque screwdriver (40) having a handle; The transmission structure (30) comprises a second rack portion (33); the base (10) comprises a bottom plate (12) and a surrounding plate (16) arranged on the bottom plate (12); the abutting member (20) is located inside the surrounding plate (16); the transmission structure (30) is located between the bottom plate (12) and the abutting member (20); the abutting member (20) comprises a abutting block (22) and a second protruding portion (24) arranged on the bottom of the abutting block (22); a portion of the second rack portion (33) is located on the second protruding portion (24).

2. The joint soft tissue balance measurement device according to claim 1, characterized in that: The transmission structure (30) further comprises a gear portion (31) and a first rack portion (32); the gear portion (31) is meshed with the first rack portion (32) and the second rack portion (33); the gear portion (31) is movably arranged between the first rack portion (32) and the second rack portion (33); the first rack portion (32) is arranged on the base (10); the second rack portion (33) is arranged on the abutting member (20); and the gear portion (31) is connected to the torque screwdriver (40).

3. The joint soft tissue balance measurement device according to claim 2, characterized in that: The base (10) comprises a bottom plate (12) and a first protruding portion (13) arranged on the bottom plate (12); the abutting member (20) comprises a abutting block (22) and a groove (23) arranged on the abutting block (22); the first protruding portion (13) is located in the groove (23); the gear portion (31) is located between a side wall of the first protruding portion (13) and a groove wall of the groove (23); the first rack portion (32) is arranged on a side wall of the first protruding portion (13) facing the gear portion (31); and the second rack portion (33) is arranged on a groove wall of the groove (23) facing the gear portion (31).

4. The joint soft tissue balance measurement device according to claim 1, characterized in that: A first guide plane (11) is arranged on the inner wall of the enclosure (16), and a second guide plane (21) contacting and cooperating with the first guide plane (11) is arranged on the outer wall of the abutting member (20).

5. The joint soft tissue balance measurement device according to claim 1, characterized in that: The base (10) is provided with an avoidance portion (14) capable of avoiding the second protruding portion (24).

6. The joint soft tissue balance measurement device according to claim 1, characterized in that: The joint soft tissue balance measurement device also includes an anti-slip structure (50).

7. The joint soft tissue balance measurement device according to claim 6, characterized in that: The anti-slip structure (50) is arranged between the base (10) and the resisting member (20), and the anti-slip structure (50) comprises a stopper (51) and a stopper groove (52) matched with the stopper (51); the stopper (51) is arranged on the base (10), and the stopper groove (52) is arranged on the resisting member (20).

8. The joint soft tissue balance measurement device according to claim 1, characterized in that: The joint soft tissue balance measurement device also includes a gripping member (60), wherein the gripping member (60) is connected to the base body (10).

9. The joint soft tissue balance measurement device according to claim 3, characterized in that: The groove (23) passes through two oppositely disposed side surfaces of the abutting block (22).

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