CN212394935U - Joint soft tissue balance measuring device - Google Patents

Abstract

The utility model provides a balanced measuring device of joint soft tissue, include: a substrate; the abutting piece is movably arranged on the base body, and the side wall of the abutting piece is provided with scale marks; the transmission structure is arranged between the base body and the abutting piece; the torque screwdriver is connected with the transmission structure and drives the abutting piece to move up and down through the transmission structure, the torque screwdriver comprises an indicating disc and an indicating needle, and scales for calibrating the stress value of the abutting piece are arranged on the indicating disc. The technical scheme of this application has solved the relatively poor problem of the degree of accuracy of carrying out the dynamometry to the soft tissue among the correlation technique effectively.

Description

Joint soft tissue balance measuring device

Technical Field

The utility model relates to an orthopedic medical instrument field particularly, relates to a joint soft tissue balance measuring device.

Background

The knee joint mainly comprises thighbone, shinbone and patella, a joint capsule is attached to the periphery of each bone joint cartilage, ligaments are arranged around the joint capsule for reinforcement, and the joint capsule, the ligaments, muscles, tendons, nerves, blood vessels and the like at the knee joint form soft tissue of the knee joint.

With the advent of aging society, knee joint pathology has become a common disease affecting the quality of life of the elderly. Total knee arthroplasty is an effective method for treating advanced knee arthropathy. Total knee replacement refers to the replacement of a knee joint, which has been seriously damaged and fails to function normally, with an artificial prosthesis, thereby eliminating pain of the knee joint and restoring its stability and mobility.

In total knee arthroplasty, to install the prosthesis, the femur and tibia are resected so that the resected bone profile matches the mounting surface of the prosthesis. For example, for the tibia, the resection step mainly includes resection of the proximal end of the tibia (referring to the end near the heart); for the femur, the resection step mainly includes resection of the distal end of the femur (referring to the end away from the heart), and resection of the anterior, posterior, oblique, and intercondylar condyles of the femur. When the distal bone cuts of the femur and tibia are completed, an osteotomy gap is formed between the femur and tibia, and the whole replacement procedure will proceed to a very critical step, namely, soft tissue balancing around the knee. The accuracy of soft tissue balance is a constantly sought and pursued goal in order to obtain better follow-up results at a long term. The related art total knee replacement performs intramedullary and extramedullary positioning osteotomies with a mechanical guide, and then the surgeon positions anatomical landmarks, lower limb force lines, and prosthesis rotation axes with naked eyes, hand feel, and experience, and then manually scribes the osteotomies, prosthesis placement, and soft tissue balancing. Although people constantly improve the mechanical positioning function of surgical instruments for cutting bone tissues and improve the accuracy of implanting the artificial prosthesis into the cutting gap, compared with the cutting bone tissues, the soft tissue balance does not have good matching instruments to help a doctor to position, measure and correct, the soft tissue balance usually depends on the experience and the technology of the doctor, the accuracy of measuring the force of the soft tissue is poor, whether the treatment is proper or not is judged, and the function and the stability of the postoperative joint are directly influenced.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a joint soft tissue balance measuring device to solve the problem of poor accuracy of force measurement to soft tissue in the related art.

In order to achieve the above object, the utility model provides a balanced measuring device of joint soft tissue, include: a substrate; the abutting piece is movably arranged on the base body, and the side wall of the abutting piece is provided with scale marks; the transmission structure is arranged between the base body and the abutting piece; the torque screwdriver is connected with the transmission structure and drives the abutting piece to move up and down through the transmission structure, the torque screwdriver comprises an indicating disc and an indicating needle, and scales for calibrating the stress value of the abutting 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 ejection piece, and the gear part is connected with the torque screwdriver.

Furthermore, the torque screwdriver comprises an indicating dial and an indicating needle, and scales for calibrating the stress value of the abutting piece are arranged on the indicating dial.

Further, the base body comprises a bottom plate and a first protruding portion arranged on the bottom plate, the abutting piece comprises an abutting block and a groove arranged on the abutting block, the first protruding portion is located in the groove, the gear portion is located between the side wall of the first protruding portion and the groove wall of the groove, the first rack portion is arranged on the side wall of the first protruding portion facing the gear portion, and the second rack portion is arranged on the groove wall of the groove facing the gear portion.

Further, the base body comprises 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.

Furthermore, a first guide plane is arranged on the inner wall of the enclosing plate, and a second guide plane in contact fit with the first guide plane is arranged on the outer wall of the abutting piece.

Further, the abutting piece comprises an abutting block and a second protruding portion arranged on the bottom of the abutting block, one 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 body.

Further, joint soft tissue balance measurement device still includes anti-disengaging structure, and anti-disengaging structure sets up between the base member and support the top, anti-disengaging structure include the backstop piece and with backstop piece complex backstop groove, on the backstop piece sets up the base member, backstop groove sets up on supporting the top.

Furthermore, the side wall of the propping piece is provided with scale marks.

Further, the joint soft tissue balance measuring device also comprises a holding piece, and the holding piece is connected to the base body.

Further, the recess runs through two sides of the relative setting of piece of propping up.

Use the technical scheme of the utility model, joint soft tissue balance measuring device includes: base member, top piece and drive structure. The abutting piece is movably arranged on the base body, and the side wall of the abutting piece is provided with scale marks. The transmission structure is arranged between the base body and the abutting piece. The torque screwdriver is connected with the transmission structure and drives the abutting part to move up and down through the transmission structure, the torque screwdriver comprises an indicating dial and an indicating needle, and scales for calibrating the stress value of the abutting part are arranged on the indicating dial. In the knee joint replacement, after the distal bone cutting of the femur and the tibia is completed, the joint soft tissue balance measuring device is implanted into the osteotomy gap between the femur and the tibia, and the torque screwdriver is rotated to drive the transmission structure to rotate. Under the action of the transmission structure, the abutting part moves upwards until the osteotomy gap is filled, so that the abutting part is in contact fit with the femoral condyle osteotomy surface, and the numerical value on the indicating disc of the torque screwdriver is zero; when the torque screwdriver is continuously rotated, the propping piece applies propping force to the osteotomy surface of the femoral condyle, the propping piece overcomes the gravity of the joint firstly and then gradually moves upwards and lifts the ligament until the ligament and the surrounding soft tissue are tensioned, if the propping piece continues to apply force, the indication value of the indicator needle of the torque screwdriver also gradually rises, the propping force reflects the tension of the ligament and the surrounding soft tissue, and the tension and the propping force are a pair of reaction force reaction forces which are equal to each other. In the process, the upward moving distance of the abutting piece can be known according to the scale marks on the side wall of the abutting piece, and the indication numerical value of the indicating needle on the indicating disc is observed, wherein the indication numerical value is the tension of soft tissues. After the tension of the soft tissues in the two areas of the medial collateral ligament and the lateral collateral ligament is obtained, whether the adjustment of the degree of looseness of the soft tissues of the knee joint is needed can be intuitively and accurately judged according to the tension of the two areas and the upward moving distance of the abutting part. If necessary, the degree of loosening of the soft tissue of the knee joint is balanced. Therefore, the technical scheme of the application effectively solves the problem of poor accuracy of force measurement of soft tissues in the related technology.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic perspective view of a first viewing angle of an abutment member extending out of a base body according to an embodiment of the device for measuring balance of soft tissue in a joint of the present invention;

FIG. 2 is a schematic front view of the anvil of the device of FIG. 1 shown extended from the base;

FIG. 3 shows a schematic cross-sectional view of the abutment of the joint soft tissue balance measuring device of FIG. 1 as it extends through the base;

FIG. 4 is a perspective view of the joint soft tissue balance measuring device of FIG. 1 from a second perspective when the abutting member extends out of the base;

FIG. 5 is a perspective view of the joint soft tissue balance measuring device of FIG. 1 from a third perspective when the abutting member extends out of the base;

FIG. 6 is a perspective view of the joint soft tissue balance measuring device of FIG. 1 from a first perspective without the abutment extending beyond the base;

FIG. 7 is a schematic front view of the anvil of the joint soft tissue balance measuring device of FIG. 1 shown without the anvil extending out of the base;

FIG. 8 shows a schematic cross-sectional view of the anvil of the joint soft tissue balance measuring device of FIG. 1 without the anvil extending out of the base;

FIG. 9 is a perspective view of the joint soft tissue balance measuring device of FIG. 1 from a second perspective when the abutting member is not extended out of the base;

FIG. 10 is a perspective view of the joint soft tissue balance measuring device of FIG. 1 from a third perspective when the abutting member is not extended out of the base;

FIG. 11 shows a perspective view from a first perspective of the base of the joint soft tissue balance measurement device of FIG. 1;

FIG. 12 shows a schematic front view of the 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 shows a perspective view from a second perspective of the base of the joint soft tissue balance measurement device of FIG. 1;

FIG. 15 is a perspective view of the base of the joint soft tissue balance measurement device of FIG. 1 from a third perspective;

FIG. 16 shows a perspective view of a first perspective of a counter element of the joint soft tissue balance measuring device of FIG. 1;

FIG. 17 shows a schematic front view of the counter part of the joint soft tissue balance measuring device of FIG. 16;

FIG. 18 is a perspective view of the abutting member of the joint soft tissue balance measuring device of FIG. 1 from a second perspective;

FIG. 19 is a perspective view of a third perspective of the abutting member of the joint soft tissue balance measuring device of FIG. 1;

FIG. 20 is a perspective view of the gear portion and the torqued screwdriver of the joint soft tissue balance measuring device of FIG. 1 shown connected;

FIG. 21 shows a perspective view of a gear portion of the joint soft tissue balance measurement device of FIG. 1;

FIG. 22 shows a perspective view of a torque screwdriver of the joint soft tissue balance measurement device of FIG. 1;

FIG. 23 is a graph illustrating torque values versus pressure values for the torqued screwdriver of the joint soft tissue balance measurement device of FIG. 1; and

fig. 24 shows a schematic view of the torque screwdriver of the joint soft tissue balance measuring device of fig. 1.

Wherein the figures include the following reference numerals:

1. a handle; 2. an indicator panel; 3. an indicator needle; 6. a quill rod; 10. a substrate; 11. a first guide plane; 12. a base plate; 13. a first projecting portion; 14. an avoidance part; 15. scribing lines; 16. enclosing plates; 20. a propping piece; 21. a second guide plane; 22. a propping block; 23. a groove; 24. a second projection; 25. scale lines; 30. a transmission structure; 31. a gear portion; 32. a first rack portion; 33. a second rack portion; 40. a torque screwdriver; 50. an anti-falling structure; 51. a stopper; 52. a stopper groove; 60. a grip.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present 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 example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1 to 10, the joint soft tissue balance measuring device of the present embodiment includes: the base body 10, the abutting piece 20 and the transmission structure 30. The abutting piece 20 is movably arranged on the base body 10, and the side wall of the abutting piece 20 is provided with scale marks 25. The transmission structure 30 is disposed between the base 10 and the abutting member 20. The torque screwdriver 40 is connected with the transmission structure 30 and drives the abutting part 20 to move up and down through the transmission structure 30, the torque screwdriver 40 comprises an indicating plate 2 and an indicating needle, and scales for calibrating the stress value of the abutting part 20 are arranged on the indicating plate 2.

By applying the technical scheme of the embodiment, the torque screwdriver 40 is connected with the transmission structure 30 and drives the abutting part 20 to move up and down through the transmission structure 30, the torque screwdriver 40 comprises the indicating dial 2 and the indicating needle 3, and the indicating dial 2 is provided with scales for calibrating the stress value of the abutting part 20. In the knee joint replacement, after the distal bone cutting of the femur and the tibia is completed, the joint soft tissue balance measuring device is implanted into the osteotomy gap between the femur and the 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 propping element 20 moves upwards until the osteotomy gap is filled, so that the propping element 20 is in contact fit with the femoral condyle osteotomy surface, and the numerical value on the indicating disc 2 of the torque screwdriver 40 is zero; when the torque screwdriver 40 is continuously rotated, the propping piece 20 applies propping force to the osteotomy surface of the femoral condyle, the propping piece 20 overcomes the gravity of the joint firstly and then gradually moves upwards and pulls up the ligament until the ligament and the surrounding soft tissue are tensioned, if the propping piece 20 continuously applies force, the indication value of the indicator needle of the torque screwdriver also gradually rises, the propping force reflects the tension force of the ligament and the surrounding soft tissue, the tension force and the propping force are a pair of reaction force reaction forces, and the two values are equal. In the process, the distance of the abutting piece 20 moving upwards can be known according to the scale marks 25 on the side wall of the abutting piece 20, and the indication value of the indicating needle 3 on the indicating disc 2 is observed, wherein the indication value is the tension of the soft tissue. After the tension forces of the soft tissues in the two areas of the medial collateral ligament and the lateral collateral ligament are obtained, whether the degree of looseness of the soft tissues of the knee joint needs to be adjusted or not can be intuitively and accurately judged according to the tension forces of the two areas and the upward moving distance of the abutting part 20, and the degree of looseness of the soft tissues of the knee joint is balanced if necessary. Therefore, the technical scheme of the embodiment effectively solves the problem of poor accuracy of force measurement on soft tissues in the related art.

As shown in fig. 3 and 8, in the present embodiment, the power transmission structure 30 includes a gear portion 31, a first rack portion 32, and a second rack portion 33. The gear portion 31 meshes with the first rack portion 32 and the second rack portion 33, and the gear portion 31 is movably provided between the first rack portion 32 and the second rack portion 33. The first rack portion 32 is provided on the base 10, the second rack portion 33 is provided on the abutting member 20, and the gear portion 31 is connected to the torque driver 40. When the torque screwdriver 40 screws the gear portion 31, the gear portion 31 can move up and down by the first rack portion 32 and the second rack portion 33, and simultaneously drives 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 meshes with the first rack portion 32 and the second rack portion 33 so that the knock member 20 can smoothly translate up and down, and has an accurate transmission ratio and high transmission accuracy. Of course, in other embodiments not shown in the figures, the transmission structure may also be a chain transmission, a belt transmission, a worm transmission.

As shown in fig. 1 and fig. 20 to fig. 22, in the present embodiment, the torque screwdriver 40 includes an indicating dial 2 and an indicating needle, and the indicating dial 2 is provided with a scale for calibrating the force value of the abutting member 20. It should be noted that the torque screwdriver is also called a torque driver, and is a common tool in the prior art. The corresponding structure of the torque screwdriver is cited in the application, and the scales on the indicating plate of the torque screwdriver are improved. Specifically, referring to fig. 24, the torque screwdriver includes a sleeve shaft 6, an indicating plate 2, an indicating pin 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 are nested, and the insides of the two are connected by a torsion spring. The sleeve rod 6 is connected with the transmission structure 30, and the transmission structure 30 is driven by the handle 1 to drive the abutting part 20 to move. When the propping component 20 applies propping force to the femoral condyle osteotomy surface, the torsion spring deforms and pushes the indicating needle 3 to move, so that the handle 1 can drive the indicating needle 3 to rotate relative to the sleeve rod 6 and the indicating disc 2, the indicating needle 3 stays on a certain numerical value on the indicating disc, and the traction force is obtained through the indication of the indicating needle 3 on the indicating disc. The specific structure of the torque screwdriver can refer to a dial type torque screwdriver with the authorization notice number CN203993676U or a measuring device with the authorization notice number CN207540706U for detecting the tightness of the steel wire rope.

What show on the dial plate of the torque screwdriver among the prior art is the torque value, improved here in this application, turned into the pressure value with the torque value. The torque value can be converted into a pressure value through a mechanical testing machine, and the pressure value is calibrated on the indicating disc 2 to form a scale for displaying the stress value of the abutting member 20. Specifically, fig. 23 shows the correspondence relationship between the torque value and the pressure value, with the torque value on the horizontal axis and the pressure value on the vertical axis. Namely, 0.2, 0.4, 0.8, 1 … … 3, 3.2 and 3.4 on the original dial are changed into 45.00, 77.00, 97.00, 132.00 … … 442.00, 446.00 and 460.00. Of course, the above numerical values are only one example, and the scales may be different due to the specific structural differences and materials.

The abutting piece 20 of the joint soft tissue balance measuring device of the embodiment can be matched with a mechanical testing machine, the handle 1 is twisted, the indicating needle 3 indicates the pressure to 0.2, 0.4, 0.8, 1 … … 3, 3.2 and 3.4, and a corresponding pressure value is obtained through the reading of the mechanical testing machine. Thus, the indication disc 2 of the torque screwdriver 40 directly displays the pressure value of the tension of the soft tissue, and the numerical value of the tension of the soft tissue on the inner side or the outer side of the knee joint is more intuitively reflected.

The sleeve rod 6 of the torque screwdriver 40 of the embodiment is a hexagonal prism, the gear portion 31 is provided with a hexagonal hole matched with the hexagonal prism, and the hexagonal prism is in splicing 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 bottom plate 12 and a first protrusion 13 disposed on the bottom plate 12, and the abutting member 20 includes an abutting block 22 and a groove 23 disposed on the abutting block 22. The first projecting portion 13 is located in the groove 23, and the gear portion 31 is located between a side wall of the first projecting portion 13 and a groove 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 groove wall of the recessed groove 23 facing the gear portion 31. The groove 23 is provided to avoid the first projecting portion 13 so that the first projecting portion 13 is inserted into the groove 23. The gear portion 31 is located between the side wall of the first protruding portion 13 and the groove wall of the groove 23, so that the joint soft tissue balance measuring device is compact and simple in structure, small in occupied space and convenient to operate.

As shown in fig. 8 and 11 to 15, in the present embodiment, the base body 10 includes a bottom plate 12 and a surrounding plate 16 provided on the bottom plate 12. The abutting piece 20 is located inside the enclosing plate 16, and the transmission structure 30 is located between the bottom plate 12 and the abutting piece 20. The surrounding plate 16 can limit the moving range of the abutting piece 20, and the abutting piece 20 is prevented from being separated from the surrounding plate 16 in the 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 enclosing plate 16, and a second guiding plane 21 contacting and cooperating with the first guiding plane 11 is provided on the outer wall of the abutting member 20. The first guide plane 11 and the second guide plane 21 are in contact fit, so that the abutting piece 20 can move more smoothly in the enclosing plate 16, and the abutting piece 20 can be prevented from rotating relative to the enclosing plate 16.

As shown in fig. 3, 8, 10, 13, 15 to 19, in the present embodiment, the abutting member 20 includes an abutting block 22 and a second protruding portion 24 disposed on the bottom of the abutting block 22. The base body 10 is provided with an escape portion 14 that can escape the second projecting portion 24. A part of the second rack portion 33 is located on the second projecting portion 24, and the provision of the second projecting portion 24 enables the height of the abutting block 22 to be increased while maintaining the overall compactness of the structure, enabling the arrangement length of the first rack portion 32 to be extended on the second projecting portion 24, and thus enabling the gear portion 31 to have a sufficient elevation height to increase the range of movement of the abutting block 22. Meanwhile, the avoidance part 14 can avoid the second protrusion part 24, and when the moving range of the abutting block 22 is increased, the second protrusion part 24 and the base body 10 can be ensured not to generate interference. The escape portion 14 is provided on the bottom plate 12, and the escape portion 14 is a through hole having both ends penetrating through both upper and lower surfaces of the bottom plate 12.

In the present embodiment, there are three second projecting portions 24, three avoidance portions 14, and the three second projecting portions 24 are provided in one-to-one correspondence with the three avoidance portions 14. A part of the above-described second rack portion 33 is arranged on the one second projecting portion 24 located in the middle of the three second projecting portions 24. Of course, in other embodiments not shown in the drawings, the number of the second protruding portions is not limited to three, and may be one, two, four or more, and the number of the corresponding avoiding portions may be the same as the number of the second protruding portions.

As shown in fig. 1, 6, 14 and 16, in the present embodiment, the joint soft tissue balance measuring device further includes a retaining structure 50, and the retaining structure 50 is disposed between the base 10 and the abutting member 20. The anti-slip structure 50 is provided to prevent the abutting member 20 from being separated from the base 10 when the upward movement of the abutting member 20 is excessively large. The retaining structure 50 includes a stopper 51 and a stopper groove 52 matched with the stopper 51, the stopper 51 is disposed on the base 10, and the stopper groove 52 is disposed on the abutting member 20. The stopper 51 is a pin inserted through the base 10. When the stopper 51 contacts with the groove sidewall of the stopper groove 52 during the upward movement of the abutting member 20, this position is an extreme position of the upward movement of the abutting member 20. One end of the stopping groove 52 of the present embodiment penetrates through the top surface of the abutting member 20, so that the top surface of the abutting member 20 can avoid the stopping member 51, and the stopping member 51 can conveniently penetrate into the stopping groove 52 in the up-down direction.

As shown in fig. 2, 7, 16 and 17, the sidewall of the supporting member 20 is provided with a graduation mark 25. The graduation mark 25 can read the rising height of the abutting part 20 and can read the whole 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 scribe lines 15 are provided on the outer wall surface of the base 10, and the plurality of scribe lines 15 are arranged on the base 10 in the vertical direction. The scribed lines 15 may be provided as reference lines for the distance the scale lines 25 rise or fall or for the height the gear portion 31 moves.

As shown in fig. 1 to 15, in the present embodiment, the joint soft tissue balance measuring 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 held at a specified position in the osteotomy gap.

As shown in fig. 1, 4, 9 and 19, in the present embodiment, the groove 23 penetrates through two opposite side surfaces of the abutting block 22. Thus, both ends of the recess 23 can escape the shaft portion of the gear portion 31, wherein one end of the recess 23 can also escape the torque driver 40 so that the torque driver 40 can pass through the abutting 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 urging member 20 is about 14mm to 25mm, the distance H3 between the top surface of the first projecting portion 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 about 4mm to 12 mm. The above dimensions enable the articular soft tissue balance measuring device to meet the size requirements of the osteotomy gap of a knee replacement.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "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 of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A joint soft tissue balance measurement device, comprising:

a base (10);

the abutting piece (20) is movably arranged on the base body (10), and the side wall of the abutting piece (20) is provided with scale marks (25);

the transmission structure (30) is arranged between the base body (10) and the abutting piece (20);

the torque screwdriver (40) is connected with the transmission structure (30) and drives the abutting part (20) to move up and down through the transmission structure (30), the torque screwdriver (40) comprises an indicating disc (2) and an indicating needle, and scales for calibrating the stress value of the abutting part (20) are arranged on the indicating disc (2).

2. The device for measuring the balance of soft joint tissue according to claim 1, wherein the transmission structure (30) comprises 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), 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 disposed on the base body (10), the second rack portion (33) is disposed on the abutting member (20), and the gear portion (31) is connected with the torque screwdriver (40).

3. The device according to claim 2, wherein the base body (10) comprises a bottom plate (12) and a first protrusion (13) arranged on the bottom plate (12), the abutting member (20) comprises an abutting block (22) and a groove (23) arranged on the abutting block (22), the first protrusion (13) is located in the groove (23), the gear portion (31) is located between a side wall of the first protrusion (13) and a 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).

4. The articular soft tissue balance measurement device according to claim 2, characterized in that the base body (10) comprises a bottom plate (12) and a surrounding plate (16) arranged on the bottom plate (12), the abutting piece (20) is positioned inside the surrounding plate (16), and the transmission structure (30) is positioned between the bottom plate (12) and the abutting piece (20).

5. The balance measuring device for the soft tissue of the joint according to claim 4, wherein a first guide plane (11) is arranged on the inner wall of the coaming (16), and a second guide plane (21) which is in contact fit with the first guide plane (11) is arranged on the outer wall of the abutting piece (20).

6. The device according to claim 4, wherein the abutting piece (20) comprises an abutting block (22) and a second protrusion (24) arranged on the bottom of the abutting block (22), a part of the second rack portion (33) is arranged on the second protrusion (24), and an avoiding portion (14) capable of avoiding the second protrusion (24) is arranged on the base body (10).

7. The device according to claim 1, further comprising a release prevention structure (50).

8. The device for measuring the balance of soft tissues in the joint according to claim 7, wherein the anti-slip structure (50) is arranged between the base body (10) and the abutting member (20), the anti-slip structure (50) comprises a stop member (51) and a stop groove (52) matched with the stop member (51), the stop member (51) is arranged on the base body (10), and the stop groove (52) is arranged on the abutting member (20).

9. The device according to claim 1, further comprising a grip (60), wherein the grip (60) is attached to the base (10).

10. The device according to claim 3, wherein the groove (23) extends through two oppositely disposed sides of the abutment block (22).

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