Gap measuring device, dismounting method thereof and external member

Abstract

The invention discloses a gap measuring device and a dismounting method thereof, and a kit, the gap measuring device can comprise a mounting part, a movable part and a rotating part, the movable part and the rotating part are mounted on the mounting part, the rotating part rotates around a first axis to drive the movable part to slide relative to the mounting part, and thus the distance between the mounting part and the movable part is adjusted; one of the rotating part and the mounting part is fixedly provided with a bulge, the other one is provided with a plurality of grooves, and the plurality of grooves are arranged around a first axis at intervals; the rotating piece can move back and forth along the first axis, so that the bulge enters or is separated from any one of the plurality of grooves; when the bulge is separated from the groove, the rotating piece can rotate around the first axis; when the protrusion enters any groove, the protrusion limits the rotating piece to rotate around the first axis. Therefore, according to the gap measuring device, through cooperation of the protrusion and the groove which are fixedly arranged, stable and reliable limiting can be provided for the rotating piece, and the accuracy of the measuring result of the gap measuring device is improved.

Description

Technical Field

[0001] The present application belongs to the field of medical device technology, and in particular relates to a gap measuring device, a disassembly method, and a kit thereof. Background Art

[0002] The main function of the flexion-extension gap meter is to open the extension gap or flexion gap to measure the size of the flexion gap and extension gap of the knee joint.

[0003] In the related art, some flexion-extension gap measuring devices include an upper support plate, a lower support plate, and an adjustment device. The upper support plate and the lower support plate respectively support the tibial osteotomy surface and the femoral osteotomy surface, and the upper support plate and the lower support plate are respectively connected to the adjustment device. The adjustment device can then adjust the spacing between the upper and lower support plates for measurement. However, after the gap between the upper and lower support plates is adjusted to the desired position, the adjustment device lacks a reliable limiting structure for fixing the upper and lower support plates, resulting in the gap between the upper and lower support plates being easily changed, ultimately affecting the accuracy of the extension gap and / or flexion gap measurement. Summary of the Invention

[0004] The embodiments of the present application provide a gap measuring device and a disassembly method and a kit thereof, which can improve the accuracy of the gap measuring device.

[0005] In a first aspect, an embodiment of the present application provides a gap measuring device, comprising a mounting component, a movable component, and a rotating component;

[0006] The movable component is mounted on the mounting component so as to be reciprocally slidable along a first direction, the mounting component is provided with a first supporting surface, and the movable component is provided with a second supporting surface, the first supporting surface and the second supporting surface are arranged opposite to each other along the first direction, one of the first supporting surface and the second supporting surface is used to abut against a tibial osteotomy surface, and the other of the first supporting surface and the second supporting surface is used to abut against a femoral osteotomy surface;

[0007] The rotating member is rotatably mounted on the mounting member about a first axis, and the rotating member is in transmission connection with the movable member so that the rotation of the rotating member about the first axis can drive the movable member to slide back and forth along the first direction;

[0008] One of the rotating member and the mounting member is fixedly provided with a protrusion, and the other of the rotating member and the mounting member is provided with a plurality of grooves, wherein the plurality of grooves are spaced apart around the first axis;

[0009] The rotating member can reciprocate along a second direction to allow the protrusion to enter or exit any one of the plurality of grooves, and the second direction is substantially parallel to the first axis;

[0010] When the protrusion is disengaged from the groove, the rotating member can rotate around the first axis;

[0011] When the protrusion enters any one of the grooves, the protrusion restricts the rotating member from rotating around the first axis;

[0012] When the protrusions are located in different grooves, the distances between the first support surface and the second support surface are different, and the distances are used to indicate the gap between the tibial osteotomy surface and the femoral osteotomy surface.

[0013] In a second aspect, an embodiment of the present application further provides a gap measuring device, comprising a mounting component, a movable component, and an eccentric member;

[0014] The movable component is mounted on the mounting component so as to be reciprocally slidable along a first direction, the mounting component is provided with a first supporting surface, and the movable component is provided with a second supporting surface, the first supporting surface and the second supporting surface are arranged opposite to each other along the first direction, one of the first supporting surface and the second supporting surface is used to abut against a tibial osteotomy surface, and the other of the first supporting surface and the second supporting surface is used to abut against a femoral osteotomy surface, and the distance between the first supporting surface and the second supporting surface is used to indicate the gap between the tibial osteotomy surface and the femoral osteotomy surface;

[0015] The eccentric piece can be mounted on the mounting component so as to rotate around a first axis. The eccentric piece is provided with a first eccentric structure. The first eccentric structure is eccentrically arranged with respect to the first axis and is transmission-connected to the movable component so that the rotation of the eccentric piece around the first axis can drive the movable component to slide along the first direction; wherein the maximum sliding distance of the movable component is less than or equal to the eccentric distance of the first eccentric structure.

[0016] In a second aspect, an embodiment of the present application further provides a gap measuring device, comprising a mounting component, a movable component, and an adjusting component;

[0017] The movable component is mounted on the mounting component so as to be reciprocally slidable along a first direction, the mounting component is provided with a first supporting surface, and the movable component is provided with a second supporting surface, the first supporting surface and the second supporting surface are arranged opposite to each other along the first direction, one of the first supporting surface and the second supporting surface is used to abut against a tibial osteotomy surface, and the other of the first supporting surface and the second supporting surface is used to abut against a femoral osteotomy surface, and the distance between the first supporting surface and the second supporting surface is used to indicate the gap between the tibial osteotomy surface and the femoral osteotomy surface;

[0018] The adjusting component is provided through the mounting component and is rotatable around a first axis. The adjusting component is provided with a first eccentric structure, and the first eccentric structure is eccentrically arranged with respect to the first axis.

[0019] The movable component is provided with a transmission portion, the transmission portion is located on one side of the adjusting component along the first axis, the first eccentric structure is capable of reciprocating along the first axis to be in transmission connection with or separation from the transmission portion, and when the first eccentric structure is in transmission connection with the transmission portion, the rotation of the adjusting component around the first axis can drive the movable component to slide along the first direction;

[0020] The transmission part is also provided with a disassembly hole, which extends along the first axial direction, with one end of the disassembly hole facing the adjusting component and the other end of the disassembly hole located on the outer surface of the movable component. The disassembly hole is used for inserting a first external instrument and pushing the adjusting component to separate the first eccentric structure from the transmission part, so that the movable component can slide along the first direction to separate from the mounting component.

[0021] In a fourth aspect, the present application further provides a disassembly method based on the above-mentioned gap measuring device, comprising the following steps:

[0022] Inserting an external instrument from the disassembly hole to push the adjustment component until the first eccentric structure is separated from the transmission part;

[0023] The movable part is slid synchronously with the external instrument along the first direction so that the movable part moves to be separated from the mounting part.

[0024] In a fifth aspect, an embodiment of the present application further provides a gap measurement device kit, comprising:

[0025] A gap measuring device as in any one of the above;

[0026] a first surgical instrument detachably connected to the gap measuring device, the first surgical instrument being used for a user to insert the gap measuring device into or remove the gap measuring device from the knee joint; and

[0027] The second surgical instrument is detachably connected to the gap measuring device, and the second surgical instrument is used for the user to rotate the rotating part, the eccentric part or the adjusting part.

[0028] In an embodiment of the present application, when it is necessary to adjust the gap between the first supporting surface and the second supporting surface, the rotating member can be moved along the negative direction of the first direction first so that the rigid protrusion disengages from the groove, thereby enabling the rotating member to rotate to drive the movable part to slide; when the gap between the first supporting surface and the second supporting surface is adjusted to the right position, the rotating member can be moved along the positive direction of the first direction so that the rigid protrusion is inserted into the groove, thereby forming a stable and reliable mechanical limit between the rotating member and the mounting part to improve the reliability of limiting the rotation of the rotating member. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and beneficial effects of the present application apparent.

[0030] Figure 1 A schematic structural diagram of a gap measurement device provided in an embodiment of the present application.

[0031] Figure 2 for Figure 1 Schematic diagram of the structure of the gap measuring device after adjustment.

[0032] Figure 3 for Figure 1 Exploded view of the rotating and mounted components in the gap measuring device shown.

[0033] Figure 4 for Figure 1 Exploded view of the gap measurement device shown.

[0034] Figure 5 for Figure 4 Schematic diagram of the transmission structure of the eccentric piece and the movable parts.

[0035] Figure 6 for Figure 1 A cross-sectional view of the gap measuring device along the AA direction is shown.

[0036] Figure 7 for Figure 6 Another transmission structure diagram of the rotating part and the eccentric part is shown.

[0037] Figure 8 for Figure 6 A schematic diagram of a disassembly scenario of the gap measuring device shown.

[0038] Figure 9 for Figure 4 Schematic diagram of another transmission structure of the eccentric piece and the movable part.

[0039] Figure 10 for Figure 6 A schematic structural diagram of another eccentric member of the gap measuring device shown.

[0040] Figure 11 for Figure 1 Schematic diagram showing the placement direction of the gap measurement device into the knee joint.

[0041] Figure 12 for Figure 1 Exploded view of the moving and mounted parts of the gap measuring device shown.

[0042] Figure 13 for Figure 10 Schematic diagram from another perspective.

[0043] Figure 14 for Figure 1 A top view of the gap measurement device shown.

[0044] Figure 15 for Figure 1 A schematic diagram of another limiting structure of the rotating part in the gap measuring device is shown.

[0045] Figure 16 Flowchart of the disassembly method of the gap measuring device provided in an embodiment of the present application.

[0046] Figure 17 A schematic diagram of the usage status of the gap measurement device kit provided in an embodiment of the present application.

[0047] The numbers in the figure are:

[0048] 100. Install components;

[0049] 11. First support surface; 12. Groove; 12a. First position-limiting structure; 13. Mounting hole; 131. Step surface; 14. First avoidance groove; 15. Instrument hole; 16. First guide structure; 17. Mounting groove; 18. First side wall; 19. First indicator mark;

[0050] 200, moving parts;

[0051] 21. Second supporting surface; 22. Transmission part; 221. Second eccentric structure; 222. Disassembly hole; 223. First weight-reducing hole; 23. Second guide structure; 24. Second avoidance groove;

[0052] 300, regulating components;

[0053] 31. Rotating member; 311. Protrusion; 311a. Second limiting structure; 312. Rotating body; 313. First transmission structure; 32. Eccentric member; 321. Main body; 322. First eccentric structure; 323. Second transmission structure; 33. Elastic member;

[0054] 400, First Surgical Instrument;

[0055] 500, second surgical instrument;

[0056] H1, first direction; H2, second direction; H3, direction of placement of the mounting component into the knee joint;

[0057] L1, first axis; L2, maximum length of the first supporting surface; L3, width from the bottom wall of the first avoidance groove to the side of the first supporting surface facing away from the first avoidance groove; L4, maximum length of the second supporting surface; L5, width from the bottom wall of the second avoidance groove to the side of the second supporting surface facing away from the second avoidance groove; L6, outer contour line of the first supporting surface; L7, outer contour line of the second supporting surface. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0059] Please refer to Figures 1 to 3 , Figure 1 A schematic structural diagram of a gap measurement device provided in an embodiment of the present application is shown. Figure 2 for Figure 1 The schematic diagram of the structure of the gap measuring device after adjustment is shown. Figure 3 for Figure 1 The embodiment of the present application provides a gap measuring device, which includes a mounting component 100 , a movable component 200 and a rotating component 31 .

[0060] The movable component 200 is mounted on the mounting component 100 so as to be reciprocally slidable along a first direction H1. The mounting component 100 is provided with a first support surface 11, and the movable component 200 is provided with a second support surface 21. The first support surface 11 and the second support surface 21 are disposed opposite each other along the first direction H1. One of the first support surface 11 and the second support surface 21 is configured to abut against a tibial osteotomy surface. The other of the first support surface 11 and the second support surface 21 is configured to abut against a femoral osteotomy surface.

[0061] The rotating member 31 is rotatably mounted on the mounting component 100 about the first axis L1. The rotating member 31 is in transmission connection with the movable member 200, so that the rotation of the rotating member 31 about the first axis L1 can drive the movable member 200 to slide back and forth along the first direction H1.

[0062] It is understood that the first axis L1 can also be understood as the rotation axis of the rotating member 31 itself. Therefore, by driving the movable component 200 to slide along the first direction H1 via the rotating member 31, the distance between the first support surface 11 and the second support surface 21 can be adjusted. The distance between the first support surface 11 and the second support surface 21 is used to indicate the gap between the tibial osteotomy surface and the femoral osteotomy surface.

[0063] Therefore, during the operation, after the tibial and femoral osteotomies are completed, the user can place the movable component 200 and the mounting component 100 between the knee joint so that one of the first support surface 11 and the second support surface 21 abuts against the tibial osteotomy surface, and the other of the first support surface 11 and the second support surface 21 abuts against the femoral osteotomy surface; then, the distance between the first support surface 11 and the second support surface 21 is adjusted by rotating the rotating part 31, and when the distance between the first support surface 11 and the second support surface 21 is adjusted to different sizes, the patient's calf can be rotated between the flexion position and the extension position, and then the flexion gap and extension gap suitable for the patient can be measured, thereby facilitating the subsequent selection of a suitable prosthesis for implantation into the patient's knee joint according to the flexion gap and extension gap suitable for the patient.

[0064] It can also be understood that, in actual use, the first support surface 11 can be used to abut against the tibial osteotomy surface, and the second support surface 21 can be used to abut against the femoral osteotomy surface; the second support surface 21 can be used to abut against the tibial osteotomy surface, and the first support surface can be used to abut against the femoral osteotomy surface; or both the first support surface 11 and the second support surface 21 can be used to abut against the tibial osteotomy surface or the femoral osteotomy surface, for example, the first support surface 11 and the second support surface 21 have the same shape, which is not limited in this embodiment of the present application.

[0065] The above is an overall explanation of the embodiment of the present application. The following will continue to illustrate the technical solution of the embodiment of the present application with examples in combination with some optional structures of the rotating member 31.

[0066] In some embodiments, one of the rotating member 31 and the mounting member 100 is fixedly provided with a protrusion 311. The other of the rotating member 31 and the mounting member 100 is provided with a plurality of grooves 12, which are spaced apart around the first axis L1.

[0067] The rotating member 31 is capable of reciprocating along a second direction H2, allowing the protrusion 311 to enter or exit any of the plurality of grooves 12. The second direction H2 is substantially parallel to the first axis L1. When the protrusion 311 exits a groove 12, the rotating member 31 is capable of rotating about the first axis L1. When the protrusion 311 enters any groove 12, the protrusion 311 restricts the rotating member 31 from rotating about the first axis L1. When the protrusion 311 is located in different grooves 12, the spacing between the first support surface 11 and the second support surface 21 varies. This spacing indicates the gap between the tibial and femoral osteotomy surfaces.

[0068] For example, when the rotating member 31 needs to be rotated to adjust the distance between the first supporting surface 11 and the second supporting surface 21, the adjustment process may be as follows:

[0069] First, the rotating member 31 is driven to move along the second direction H2 until the protrusion 311 is separated from the first groove 12 .

[0070] Then, the rotating member 31 is rotated around the first axis L1 to a suitable angle, and the rotating member 31 faces the second groove 12 .

[0071] Finally, the driving rotating member 31 is moved and reset along the second direction H2 so that the protrusion 311 enters the second groove 12, thereby limiting the rotation of the rotating member 31, and preventing the distance between the first support surface 11 and the second support surface 21 from changing, thereby ensuring the accuracy of the flexion gap and even gap measurement.

[0072] In some embodiments, the first axis L1 may be substantially perpendicular to the first direction H1. Of course, in some other embodiments, the first axis L1 may also be parallel to the first direction H1, which is not limited in this embodiment of the present application.

[0073] In some embodiments, the protrusion 311 may be a rigid protrusion, or the protrusion 311 may be made of a rigid material, such as a hard plastic material, a hard alloy material, or a hard metal material.

[0074] At the same time, because the protrusion 311 is fixed, compared to the use of some elastic and retractable parts such as glass bead springs for limiting, after the rotating member 31 receives the external force of rotation about the first axis L1, the protrusion 311 will not move radially or retract. Therefore, during the actual measurement process, when the protrusion 311 enters the groove 12, the movable component 200 can withstand a pressure of 400N without moving relative to the mounting component 100. The pressure of 400N is much greater than the tension of the patient's ligaments in the calf flexion and extension state. Therefore, the rigid protrusion can ensure the reliability of the position of the movable component 200 during the measurement process, or in other words, it can ensure that the distance between the first support surface 11 and the second support surface 21 will not change during the measurement process, thereby ensuring the accuracy and reliability of the measurement results of the gap measurement device.

[0075] For example, the mounting component 100 is provided with a mounting hole 13 . A plurality of grooves 12 are arranged around the first axis L1 on the wall of the mounting hole 13 . The rotating member 31 is passed through the mounting hole 13 , and the protrusion 311 protrudes from the outer circumference of the rotating member 31 .

[0076] Alternatively, the mounting component 100 may be provided with a mounting hole 13. The protrusion 311 protrudes from the wall of the mounting hole 13. The rotating member 31 is passed through the mounting hole 13, and the plurality of grooves 12 are arranged on the outer periphery of the rotating member 31 around the first axis L1.

[0077] Therefore, when the protrusion 311 enters the groove 12 , the protrusion 311 or the groove 12 provided on the outer peripheral side of the rotating member 31 can provide a more stable and reliable limit for the rotating member 31 .

[0078] In some embodiments, there may be at least two protrusions 311 , which are spaced apart around the first axis L1 . Thus, positioning by multiple protrusions 311 can provide more stable and reliable positioning for the rotating member 31 at various locations along the circumference.

[0079] For example, the number of the protrusions 311 can be two, and the two protrusions 311 are symmetrically arranged along the radial direction of the rotating member 31. Of course, in some other embodiments, the number of the protrusion 311 can also be one, and this embodiment of the present application does not limit this.

[0080] Please continue to refer to Figure 4 , Figure 4 for Figure 1 In some embodiments, the second support surface 21 can be located on a side of the movable component 200 that faces away from the mounting component 100 along the first direction H1. For example, when the first direction H1 is a height direction, the second support surface 21 can be located on the top side of the movable component 200.

[0081] In some embodiments, the first support surface 11 may be located on a side of the mounting component 100 along the first direction H1 that is away from the second support surface 21. For example, when the first direction H1 is a height direction, the second support surface 21 may be located above the mounting component 100, and the first support surface 11 may be located on the bottom side of the mounting component 100.

[0082] In some embodiments, the mounting component 100 further includes a first sidewall 18. The first sidewall 18 is connected to the first support surface 11 and extends toward the second support surface 21. The rotating member 31 is mounted on the first sidewall 18. For example, when the first direction H1 is the height direction, the second support surface 21 is located above the first support surface 11, and the first sidewall 18 is located between the second support surface 21 and the first support surface 11. The rotating member 31 is also disposed between the second support surface 21 and the first support surface 11. After the gap measuring device is placed in the knee joint, the rotating member 31 can be generally oriented toward the front of the knee to facilitate user operation.

[0083] In some embodiments, the rotating member 31 is at least partially exposed from the outer surface of the mounting component 100 so as to be driven to rotate by an external force, thereby facilitating adjustment by the user.

[0084] For example, one axial end of the rotating member 31 may face the outside of the mounting component 100, so that the user can use an external instrument (such as the second surgical instrument 400 described below) to turn the rotating member 31. Then, when the rotating member 31 is disposed on the side wall of the mounting component 100, after the gap measuring device is inserted into the knee joint, the rotating member 31 can face the outside of the knee joint, or toward the user, such as a surgeon, to facilitate adjustment.

[0085] In some embodiments, the end of the rotating member 31 exposed from the outer surface of the mounting component 100 may be provided with a non-circular hole such as a straight hole, a cross hole, a plum blossom hole, a hexagonal hole, a pentagonal hole, etc., so that the rotating member 31 can be twisted after a screwdriver or a screwdriver is inserted into the non-circular hole.

[0086] It can also be understood that the end of the rotating member 31 exposed to the outer surface of the mounting component 100 can be located in the corresponding hole or groove structure of the mounting component 100 and is not blocked, and the end of the rotating member 31 exposed to the outer surface of the mounting component 100 can also protrude from the outer surface of the mounting component 100. This embodiment of the present application does not limit this.

[0087] When the end of the rotating part 31 exposed on the outer surface of the mounting component 100 can also protrude from the outer surface of the mounting component 100, the end of the rotating part 31 exposed on the outer surface of the mounting component 100 can also be directly screwed by the user, and this embodiment of the application does not limit this.

[0088] In some embodiments, the gap measuring device may further include an elastic member 33, which is at least partially disposed in the mounting hole 13. The elastic member 33 abuts against the rotating member 31 to drive the rotating member 31 to move along the second direction H2 until the protrusion enters the groove.

[0089] Therefore, when the user needs to adjust the movable component 200, one adjustment process may be as follows:

[0090] First, the rotating member 31 is driven to move along the second direction H2 , for example, the rotating member 31 is pressed toward the mounting hole 13 , so that the protrusion 311 is disengaged from the first groove 12 and the elastic member 33 is compressed.

[0091] Then, after the rotating member 31 is disengaged from the first groove 12 , the user can drive the rotating member 31 to rotate around the first axis L1 , thereby driving the movable component 200 to move to a suitable position and making the protrusion 311 face the second groove 12 .

[0092] Finally, the user releases the rotating member 31, causing the elastic member 33 to elastically recover and drive the rotating member 31 to move back in the second direction H2, for example, toward the outside of the mounting hole 13 until the protrusion 311 enters the second groove 12. As a result, the movable component 200 moves from the position corresponding to the first groove to at least the position corresponding to the second groove.

[0093] like Figures 2 to 4 As shown in any one of the embodiments, a first indicator mark 19 is provided on the outer surface of the mounting component 100. The first indicator mark 19 is located on the end surface of the hole of the mounting hole 13 to indicate the distance between the first support surface 11 and the second support surface 21 and / or the thickness of the meniscus prosthesis corresponding to the distance.

[0094] Then, when the first indicator mark 19 is used to indicate the distance between the first support surface 11 and the second support surface 21, the user can more simply and intuitively obtain the appropriate flexion gap and / or extension gap parameters, and further conveniently select a meniscus prosthesis of appropriate thickness.

[0095] When the first indicator mark 19 is used to indicate the thickness of the meniscus prosthesis corresponding to the distance between the first support surface 11 and the second support surface 21, the user can directly select the appropriate thickness of the meniscus prosthesis without having to further determine the appropriate thickness of the meniscus prosthesis based on the distance between the first support surface 11 and the second support surface 21. This can further simplify the surgical procedure and prevent the user from selecting an inappropriate meniscus prosthesis due to misjudgment. It should also be noted that meniscus prostheses of different thicknesses can also be understood as meniscus prostheses of different models or specifications.

[0096] Correspondingly, the rotating member 31 may be provided with a second indicator mark, which is used to cooperate with the first indicator mark 19 to indicate the distance between the first support surface 11 and the second support surface 21 and / or the thickness of the meniscus prosthesis corresponding to the distance.

[0097] For example, the first indicator 19 may include multiple first scale marks and multiple first numbers, with the multiple first scale marks spaced apart around the first axis L1, and each first number corresponding to a first scale mark. Accordingly, the second indicator may include a first indicator mark such as an arrow or a dot, and the first indicator mark may point to different first scale marks and first numbers as the rotating member 31 rotates.

[0098] Of course, the second indicator may also include multiple second scale marks and multiple second numerals, with the multiple second scale marks spaced apart around the first axis L1, and each second numeral corresponding to a second scale mark. Accordingly, the first indicator 19 may include a second indicator mark such as an arrow or a dot, and the second indicator mark may point to different second scale marks and second numerals as the rotating member 31 rotates.

[0099] The difference in thickness between two adjacent first numbers or two adjacent second numbers of the meniscus prosthesis may be 1 mm. Of course, in some other embodiments, the difference in thickness between two adjacent first numbers or two adjacent second numbers of the meniscus prosthesis may be between 0.1 and 10 mm, which is not limited in this embodiment of the present application.

[0100] The above is an example description of some matching structures of the rotating member 31 and the mounting member 100 in the embodiment of the present application. The following is an example description of the transmission structure combining the rotating member 31 and the movable member 200.

[0101] It is understandable that the transmission connection between the rotating part 31 and the movable part 200 can be diverse. For example, the rotating part 31 can drive the movable part 200 to move along the first direction H1 through a bevel gear transmission structure, a connecting rod transmission structure, a cam transmission structure or an eccentric wheel transmission structure. The embodiment of the present application does not limit this.

[0102] Illustratively, the mounting component 100 is provided with a mounting slot 17 and a mounting hole 13 that communicate with each other. On one hand, the rotating member 31 is mounted in the mounting hole 13 so as to be rotatable about a first axis L1. On the other hand, a transmission portion 22 is protruding from the side of the movable component 200 facing away from the second support surface 21. The transmission portion 22 is disposed in the mounting slot 17 so as to be movable in a first direction H1. The transmission portion 22 is in transmission connection with the rotating member 31, such that rotation of the rotating member 31 about the first axis L1 drives the transmission portion 22 to move in the first direction H1.

[0103] Furthermore, by opening corresponding holes or groove structures in the mounting component 100 to accommodate the transmission structure of the rotating part 31 and the movable part 200, the gap measuring device can be made smaller and more compact, so that the user can more conveniently insert it into the knee joint, and avoid discomfort caused by the gap measuring device being too large and compressing the tissues at the knee joint.

[0104] It is understandable that the transmission part 22 can be integrally formed with the main body of the movable component 200, or can be detachably connected, which is not limited in the embodiment of the present application.

[0105] It can also be understood that the transmission connection between the rotating member 31 and the transmission part 22 can be diverse. For example, the rotating member 31 can drive the transmission part 22 to move along the first direction H1 through a bevel gear transmission structure, a connecting rod transmission structure, a cam transmission structure or an eccentric wheel transmission structure. The embodiment of the present application does not limit this.

[0106] For example, please refer to Figure 4 and Figure 5 , Figure 5 for Figure 4 Schematic diagram of the transmission structure between the eccentric member and the movable component. The gap measuring device may also include an eccentric member 32. The eccentric member 32 is connected to the rotating member 31 so that rotation of the rotating member 31 about the first axis L1 can drive the eccentric member to rotate about the first axis L1. The eccentric member 32 is provided with a first eccentric structure 322. The first eccentric structure 322 is eccentrically arranged with respect to the first axis L1 and is in transmission connection with the transmission unit 22. Such rotation of the first eccentric structure 322 about the first axis L1 can drive the movable component 200 to slide along the first direction H1.

[0107] Therefore, when a user rotates the rotating member 31, it first drives the eccentric member 32 to rotate about the first axis L1. As the eccentric member 32 rotates about the first axis L1, the first eccentric structure 322 drives the transmission unit 22 to slide in the first direction H1. The sliding of the transmission unit 22 also drives the entire movable component 200 to slide synchronously. Ultimately, the rotation of the rotating member 31 about the first axis L1 drives the movable component 200 to slide in the first direction H1.

[0108] Please continue to refer to Figure 6 , Figure 6 for Figure 1 A cross-sectional view of the gap measurement device along the AA direction is shown. In some embodiments, the inner wall of the mounting hole 13 is provided with a stepped surface 131 facing the transmission portion 22. The eccentric member 32 is at least partially disposed within the mounting hole 13. The end of the rotating member 31 away from the eccentric member 32 abuts against the stepped surface 131, and the end of the eccentric member 32 away from the stepped surface 131 abuts against the transmission portion 22, thereby preventing the eccentric member 32 and the rotating member 31 from disengaging from the mounting hole 13.

[0109] Furthermore, on the one hand, the transmission part 22 and the step surface 131 can be used to clamp the entirety of the eccentric member 32 and the rotating member 31 to limit the installation of the eccentric member 32 and the rotating member 31; on the other hand, the transmission part 22 or the movable part 200 can also be limited by the eccentric member 32, thereby realizing the interlocking of multiple parts such as the movable part 200, the installation part 100, the rotating part 31 and the eccentric member 32, so as to avoid the movable part 200, the installation part 100, the rotating part 31 and the eccentric member 32 from falling off during use, thereby improving the reliability of the gap measuring device and the accuracy of the measurement results.

[0110] In some embodiments, the groove 12 can extend from the step surface 131 to the end surface of the hole 13 facing away from the transmission part 22 , and the protrusion 311 can be arranged on the outer peripheral side of the rotating part 31 , and the protrusion 311 slides in conjunction with the groove 12 .

[0111] For example, the protrusion 311 may be a tooth-shaped protrusion, and the groove 12 may be a tooth groove that cooperates with the tooth-shaped protrusion.

[0112] In some embodiments, the rotating member 31 includes a rotating body 312 and a first transmission structure 313. The first transmission structure 313 is at least partially located on the side of the rotating body 312 facing the transmission portion 22. The eccentric member 32 includes a main body 321 and a second transmission structure 323. The second transmission structure 323 is at least partially located on the side of the main body 321 facing away from the transmission portion 22. The first transmission structure 313 and the second transmission structure 323 are slidably connected to each other, allowing the eccentric member 32 and the rotating member 31 to move relative to each other along the first axis L1, and allowing the rotating member 31 to drive the eccentric member 32 to rotate about the first axis L1.

[0113] Then, when the user drives the rotating member 31 to move along the second direction H2 so that the protrusion 311 enters or exits the groove 12, the rotating member 31 can slide relative to the eccentric member 32, thereby ensuring that the rotating member 31 always forms a stable and reliable transmission connection with the transmission part 22 through the eccentric member 32.

[0114] For example, please refer to Figure 6 and Figure 7 , Figure 7 for Figure 6 In the schematic diagram of another transmission structure of the rotating member and the eccentric member, one of the first transmission structure 313 and the second transmission structure 323 is a transmission shaft, and the other of the first transmission structure 313 and the second transmission structure 323 is a transmission hole. The transmission shaft is inserted into the transmission hole.

[0115] For example, the transmission shaft is a flat shaft, and the transmission hole is a waist-shaped hole or a long hole that matches the flat shaft. Thus, through the matching of the transmission shaft and the transmission hole axis, the rotating member 31 can drive the eccentric member 32 to rotate and can also rotate relative to the eccentric member 32.

[0116] In some embodiments, the gap measuring device further includes an elastic member 33 , which is compressed and disposed between the rotating body 312 and the main body 321 .

[0117] Accordingly, the elastic member 33 can be sleeved on the transmission shaft. For example, the elastic member 33 can be a helical compression spring or a disc spring, etc., which is not limited in the embodiment of the present application.

[0118] In some embodiments, on the one hand, the eccentric member 32 is mounted on the rotating member 31 so as to be reciprocally movable along the second direction H2, so that the eccentric member 32 can move along the second direction H2 to be in transmission connection with or disconnected from the transmission portion 22. On the other hand, the transmission portion 22 is further provided with a disassembly hole 222, which extends along the first axis L1. One end of the disassembly hole 222 faces the eccentric member 32. The other end of the disassembly hole 222 is located on the outer surface of the movable component 200. The disassembly hole 222 is used to allow a first external instrument to be inserted to push the eccentric member 32 until the first eccentric structure 322 is separated from the transmission portion 22, thereby allowing the movable component 200 to slide along the first direction H1 to be disconnected from the mounting component 100.

[0119] For example, the eccentric member 32 is installed in the mounting hole 13 , and an elastic member 33 is further provided in the mounting hole 13 . The elastic member 33 is used to drive the eccentric member 32 to approach the transmission part 22 along the second direction H2 so that the eccentric member 32 is connected to the transmission part 22 in transmission.

[0120] Then, please combine Figure 6 and Figure 8 , Figure 8 for Figure 6 A schematic diagram of a disassembly scenario for the gap measuring device is shown. The first external instrument, which can be a long rod, can be inserted into the disassembly hole 222 to push against the eccentric member 32, thereby driving the eccentric member 32 to move and separate from the transmission portion 22. The first external instrument is then synchronously moved in the first direction H1 along the movable component 200, so that the movable component 200 slides and separates from the mounting component 100. Finally, the first external instrument is removed from the movable component 200, and the eccentric member 32, elastic member 33, and rotating member 31 are removed from the mounting hole 13, completing the disassembly of the entire gap measuring device and facilitating cleaning and disinfection of the entire gap measuring device.

[0121] In some embodiments, the transmission portion 22 may further include a first lightening hole 223. The first lightening hole 223 may be connected to the disassembly hole 222. For example, the first lightening hole 223 may be located in the middle of the transmission portion 22. Of course, the first lightening hole 223 may not be connected to the disassembly hole 222, and this embodiment of the present application is not limited thereto.

[0122] Please continue to combine Figure 5 and Figure 9 , Figure 9 for Figure 4 Schematic diagram of another transmission structure between the eccentric member and the movable part. In some embodiments, the first eccentric structure 322 is at least partially located on the side of the eccentric member 32 facing away from the rotating member 31. The transmission portion 22 is provided with a second eccentric structure 221, which is at least partially located on the side of the transmission portion 22 facing the rotating member 31. Among them, one of the first eccentric structure 322 and the second eccentric structure 221 is a slide groove, and the other of the first eccentric structure 322 and the second eccentric structure 221 is a boss. The boss is slidably installed in the slide groove, so that the eccentric member 32 follows the rotation of the rotating member 31 and drives the movable part 200 to slide along the first direction H1.

[0123] Taking the second eccentric structure 221 including a slide groove as an example, the disassembly hole 222 can be connected to the slide groove or can be offset from the slide groove, which is not limited in this embodiment of the present application.

[0124] Then, in practice, an assembly process can be as follows:

[0125] First, the rotating member 31 , the elastic member 33 and the eccentric member 32 are sequentially installed into the mounting hole 13 from the side of the mounting hole 13 close to the transmission portion 22 , so that the rotating member 31 abuts against the step surface 131 of the mounting hole 13 .

[0126] Then, the eccentric member 32 is pressed so as to move the eccentric member 32 toward the rotating member 31 to avoid the position.

[0127] Next, the movable component 200 is moved along the first direction H1 so that the transmission portion 22 enters the installation groove 17 until the protrusion abuts against the end surface of the groove opening of the sliding groove and the eccentric member 32 is released.

[0128] Finally, the movable component 200 is continued to be moved along the first direction H1 so that the boss is aligned with the slide groove. The elastic member 33 drives the eccentric member 32 to reset, thereby inserting the boss into the slide groove.

[0129] Please continue to refer to Figure 10 , Figure 10 for Figure 6FIG2 is a schematic structural diagram of another eccentric member of the gap measuring device. In some other embodiments, the eccentric member 32 may be integrally formed with the rotating member 31 .

[0130] When the eccentric member 32 and the rotating member 31 are integrally formed, the gap measuring device further includes an elastic member 33, which is at least partially disposed in the mounting hole 13. The elastic member 33 is used to drive the eccentric member 32 or the rotating member 31 to move along the second direction H2 so that the protrusion 311 enters the groove 12.

[0131] For example, the elastic member 33 may abut between the transmission portion 22 and the rotating member 31 .

[0132] Thus, the rotation of the rotating member 31 about the first axis L1 can drive the eccentric member 32 to rotate synchronously about the first axis L1, and the rotation of the eccentric member 32 about the first axis L1 can then drive the movable component 200 to move along the first direction H1. Furthermore, when a user presses the rotating member 31 in the second direction H2, or in the direction of the first axis L1, the one of the rotating member 31 and the eccentric member 32 that abuts against the elastic member 33 can compress the elastic member 33. When the user releases the pressure on the rotating member 31, the elastic member 33 can drive the eccentric member 32 and the rotating member 31 to return to their original position, thereby allowing the user to press the rotating member 31.

[0133] In some embodiments, the maximum distance that the first eccentric structure 322 drives the movable component 200 to slide is less than or equal to the eccentricity of the first eccentric structure 322. The eccentricity of the first eccentric structure 322 is the distance from the first eccentric structure 322 to the first axis L1.

[0134] It is understandable that the distance that the eccentric member 32 drives the movable component 200 to slide in the first direction H1 can theoretically be twice the eccentricity of the first eccentric structure 322. However, when the distance that the eccentric member 32 drives the movable component 200 to slide in the first direction H1 is twice the eccentricity of the first eccentric structure 322, the mounting component 100 needs to be thicker, resulting in a thicker overall gap measurement device. In contrast, the maximum distance that the first eccentric structure 322 drives the movable component 200 to slide is less than or equal to the eccentricity of the first eccentric structure 322. This can both meet actual measurement requirements and avoid making the overall gap measurement device thicker.

[0135] Of course, in some other embodiments, the distance that the eccentric member 32 drives the movable component 200 to slide along the first direction H1 may also be twice the eccentricity of the first eccentric structure 322 , which is not limited in this embodiment of the present application.

[0136] The above are some examples of the transmission mode of the rotating member 31 and the movable member 200 in the embodiment of the present application. The following further explains and illustrates the technical solution of the embodiment of the present application in combination with some optional structures of the mounting member 100 and the movable member 200.

[0137] In some embodiments, during the sliding movement of the movable component 200, the first support surface 11 and the second support surface 21 are always located on different sides of the rotating member 31 along the first direction H1. Therefore, compared to a rotating member 31 that protrudes from the first support surface 11 or the second support surface 21, the rotating member 31 can be made smaller, thereby making the gap measurement device thinner, making it easier for the user to insert it into the knee joint and avoiding discomfort caused by the gap measurement device being too large and compressing the tissues of the knee joint.

[0138] In some embodiments, during the sliding movement of the movable component 200, the first support surface 11 and the second support surface 21 are always located on different sides of the eccentric member 32 along the first direction H1. Therefore, compared to when the eccentric member 32 protrudes from the first support surface 11 or the second support surface 21, the eccentric member 32 can be made smaller, thereby making the gap measurement device thinner, making it easier for the user to insert it into the knee joint and avoiding discomfort caused by the gap measurement device being too large and compressing the tissues of the knee joint.

[0139] In some embodiments, during the sliding process of the movable component 200, the movable component 200, the mounting component 100, the rotating component 31, and the eccentric component 32 form a single integral component. The first support surface 11 and the second support surface 21 respectively form different end surfaces of the integral component along the first direction H1. As a result, the gap measurement device can be made thinner, making it easier for users to insert it into the knee joint and avoiding discomfort caused by excessive pressure on the knee joint tissue due to the large size of the gap measurement device.

[0140] Please continue to refer to Figure 11 , Figure 11 for Figure 1 Schematic diagram of the direction of insertion of the gap measurement device into the knee joint. In some embodiments, a first avoidance groove 14 is provided on the side of the mounting component 100 that is initially inserted into the knee joint. The opening of the first avoidance groove 14 is oriented in the same direction H3 as the direction H3 in which the mounting component 100 is inserted into the knee joint.

[0141] Furthermore, the first avoidance groove 14 can be used for the cruciate ligament to avoid.

[0142] It is also understood that the direction H3 in which the mounting component 100 is inserted into the knee joint is the approximate direction in which the mounting component 100 is inserted into the knee joint. For example, the mounting component 100 may be inserted into the knee joint from the front to the back of the knee, and during this process, the mounting component 100 may swing or move slightly left and right. In this case, the direction H3 in which the mounting component 100 is inserted into the knee joint is from the front to the back of the knee.

[0143] A second avoidance groove 24 is provided on the side of the movable component 200 for first placement into the knee joint. The notch of the second avoidance groove 24 faces the same direction H3 as the direction H3 in which the mounting component 100 is placed into the knee joint.

[0144] Furthermore, the second avoidance groove 24 can be used to avoid the cruciate ligament.

[0145] In some embodiments, the mounting component 100 includes a first sidewall 18. The first sidewall 18 is connected to the first support surface 11 and extends toward the second support surface 21. An instrument hole 15 is also defined on a side of the first sidewall 18 facing away from the first avoidance groove 14. The instrument hole 15 is configured to receive a second external instrument, allowing a user to move the mounting component 100 using the second external instrument.

[0146] Thus, it is convenient for the user to place the gap measuring device into the knee joint, and after the gap measuring device is placed into the knee joint, the second external instrument can be separated from the mounting component 100 to facilitate the patient's weight adjustment of the knee joint posture.

[0147] In some embodiments, when the first side wall 18 further has a mounting hole 13 , the adjustment component 300 is rotatably mounted on the mounting hole 13 . The mounting hole 13 and the instrument hole 15 are spaced apart along the circumference of the first side wall 18 .

[0148] Furthermore, compared with the case where the mounting hole 13 and the instrument hole 15 are arranged along the thickness direction of the mounting component 100 , the thickness of the mounting component 100 can be greatly reduced, so that the gap measuring device as a whole is more compact.

[0149] In some embodiments, the distance between the mounting hole 13 and the instrument hole 15 is smaller than the distance between the mounting hole 13 and the first avoidance groove 14. For example, the mounting hole 13 and the instrument hole 15 are arranged adjacent to each other, so that both the mounting hole 13 and the instrument hole 15 can be well oriented toward the user for easy operation.

[0150] In some embodiments, the end surface of the hole opening of the mounting hole 13 is a plane, so that it is convenient for the user to obtain the information provided by the first indicator mark 19 more accurately on the basis of being convenient for operation.

[0151] Of course, in some other embodiments, the mounting hole 13 and the instrument hole 15 may also be arranged along the thickness direction of the mounting component 100, and this embodiment of the present application does not limit this.

[0152] Please continue to refer to Figure 12 and Figure 13 , Figure 12 for Figure 1 Exploded view of the movable and mounted parts of the gap measuring device shown, Figure 13 for Figure 10 Schematic diagram from another perspective. In some other embodiments, the mounting component 100 is provided with at least one first guide structure 16, and the movable component 200 is provided with at least one second guide structure 23. Each first guide structure 16 is slidably connected to the second guide structure 23 along the first direction H1. Thus, the cooperation between the first guide structure 16 and the second guide structure 23 can effectively support the movable component 200 and control the sliding path of the movable component 200.

[0153] In some other embodiments, at least one first guide structure 16 is located on a side of the first avoidance groove 14 to which the mounting component 100 is close.

[0154] It is understandable that the main force-bearing positions of the second support surface 21 and the first support surface 11 are in the parts of their respective contacts with the osteotomy surfaces of the knee joint. Therefore, by having at least one first guide structure 16 located on the side of the first avoidance groove 14 close to the mounting component 100, it means that the side of the second support surface 21 and the first support surface 11 that is first inserted between the knee joint can be supported. Then, compared to the guide fit formed by the mounting component 100 and the movable component 200 at the position outside the knee joint, the embodiment of the present application can avoid the formation of a cantilever structure between the movable component 200 and the portion of the mounting component 100 inserted between the knee joint, thereby avoiding bending and deformation of the portion of the movable component 200 and the mounting component 100 inserted between the knee joint, and ultimately improving the accuracy of the measurement.

[0155] In some embodiments, along the first direction H1 , an orthographic projection of the at least one second guide structure 23 is located within an orthographic projection of the second supporting surface 21 .

[0156] Therefore, by setting a second guide structure 23 at the corresponding position of the second support surface 21, compared with the guide cooperation formed by the mounting component 100 and the movable component 200 at the position outside the knee joint, the embodiment of the present application can avoid the formation of a cantilever structure between the movable component 200 and the mounting component 100 placed in the knee joint, thereby avoiding bending and deformation of the portion between the movable component 200 and the mounting component 100 placed in the knee joint, and ultimately improving the accuracy of the measurement.

[0157] In some embodiments, at least three first guide structures 16 may be distributed in a triangular shape to provide stable support.

[0158] In some embodiments, at least two first guide structures 16 are relatively disposed on different sides of the first support surface 11 to provide stable support.

[0159] In some embodiments, the first guide structure 16 may be a guide hole and the second guide structure 23 may be a guide post, or the first guide structure 16 may be a guide post and the second guide structure 23 may be a guide hole. This embodiment of the present application does not limit this.

[0160] There are multiple first guide structures 16 , and at least two first guide structures 16 are relatively disposed on different sides of the first support surface 11 .

[0161] Please continue to refer to Figure 14 , Figure 14 for Figure 1 A top view of the gap measurement device is shown. In some embodiments, along the length direction of the first support surface 11, the maximum length L2 of the first support surface 11 is greater than or equal to 60.4 mm and less than or equal to 86 mm. The length direction of the first support surface 11 is substantially perpendicular to the direction H3 in which the mounting component 100 is inserted into the knee joint. Along the width direction of the first support surface 11, the width L3 from the bottom wall of the first avoidance groove 14 to the side of the first support surface 11 facing away from the first avoidance groove 14 is greater than or equal to 39 mm and less than or equal to 57 mm.

[0162] It can be understood that, taking the first support surface 11 used to abut the tibial osteotomy surface as an example, the tibial support prosthesis corresponding to the first support surface 11 usually has multiple different specifications, and the size of the first support surface 11 in the embodiment of the present application conforms to the size of the middle specification among the multiple different specifications of tibial support prostheses, so that in actual use, it can avoid the first support surface 11 being too large, resulting in unstable support and causing pressure, irritation and discomfort to the tissues around the knee joint, and can also avoid the first support surface 11 being too small, resulting in unstable support.

[0163] In some embodiments, along the length direction of the second support surface 21, the maximum length L4 of the second support surface 21 is greater than or equal to 60.4 mm and less than or equal to 86 mm. The length direction of the second support surface 21 is substantially perpendicular to the direction H3 in which the mounting component 100 is inserted into the knee joint. Along the width direction of the second support surface 21, the width L5 from the bottom wall of the second avoidance groove 24 to the side of the second support surface 21 facing away from the second avoidance groove 24 is greater than or equal to 39 mm and less than or equal to 57 mm.

[0164] It can be understood that, taking the second support surface 21 used to abut against the femoral osteotomy surface as an example, the meniscus prostheses corresponding to the second support surface 21 usually have multiple different specifications, and the size of the second support surface 21 in the embodiment of the present application conforms to the size of the middle specification among the multiple different specifications of meniscus prostheses, so that in actual use, it can avoid the second support surface 21 being too large, resulting in unstable support and causing compression, irritation and discomfort to the tissues around the knee joint, and can also avoid the second support surface 21 being too small, resulting in unstable support.

[0165] In some embodiments, at least 50% of the outer contour line L6 of the first support surface 11 can match the outer contour line of a standard tibial plateau prosthesis. This allows the shape of the first support surface 11 to better match the tibial osteotomy surface, improving support effectiveness and measurement accuracy.

[0166] In some embodiments, at least 50% of the outer contour line L7 of the second support surface 21 can match the outer contour line of a standard tibial plateau prosthesis. This allows the shape of the second support surface 21 to better match the femoral osteotomy surface, improving support effectiveness and measurement accuracy.

[0167] In some embodiments, the rotating member 31 is configured to follow the mounting member 100 and be at least partially inserted between the tibial and femoral osteotomy surfaces. Thus, compared to a case where the mounting member 100 is inserted between the tibial and femoral osteotomy surfaces and the rotating member 31 is completely exposed outside the tibial and femoral osteotomy surfaces, the embodiment of the present application is more compact, making it easier for the user to insert the gap measurement device into the knee joint and avoiding discomfort caused by compression of the knee joint tissue by the gap measurement device being too large.

[0168] For example, the orthographic projection of the rotating member 31 on the second support surface 21 at least partially overlaps with the second support surface 21. Thus, when the mounting component 100 is placed between the tibial osteotomy surface and the femoral osteotomy surface, at least the portion of the rotating member 31 whose orthographic projection is located on the second support surface 21 can be simultaneously placed between the tibial osteotomy surface and the femoral osteotomy surface.

[0169] In some embodiments, at least 80% of the orthographic projection of the rotating member 31 on the second support surface 21 overlaps with the second support surface 21. Thus, most or even all of the rotating member 31 can be synchronously placed between the tibial osteotomy surface and the femoral osteotomy surface along with the mounting component 100.

[0170] For example, 80%, 81%, 83.7%, 86.9%, 88.4%, 90%, 92.3%, 95.4%, 98% or 100% of the orthographic projection of the rotating part 31 on the second supporting surface 21 coincides with the second supporting surface 21, and this embodiment of the present application does not limit this.

[0171] It can also be understood that the number of the rotating parts 31 can be one or at least two, and this embodiment of the present application does not limit this.

[0172] For example, if there are at least two rotating members 31, there are also at least two movable components 200, with each movable component 200 being in transmission connection with a different rotating member 31. Thus, different movable components 200 can abut different areas of the femoral osteotomy surface, and by adjusting different rotating members 31, different movable components 200 can be adjusted, thereby testing the balance of the soft tissue of the knee joint.

[0173] For example, one or more rotating members 31 may be used to abut against the area corresponding to the medial condyle in the femoral osteotomy surface, and one or more rotating members 31 may be used to abut against the area corresponding to the lateral condyle in the femoral osteotomy surface.

[0174] It should be noted that the first axis L1 can also be understood as the rotation axis of each rotating member 31. That is, when there are at least two rotating members 31, the first axis L1 corresponding to each rotating member 31 is the rotation axis of the rotating member 31 itself, and different rotating members 31 have different first axes L1. Of course, in some other embodiments, the first axes L1 corresponding to different rotating members 31 can also be the same, and this embodiment of the application is not limited to this.

[0175] Please combine Figure 4 and Figure 5 , an embodiment of the present application further provides a gap measuring device, which may include a mounting component 100 , a movable component 200 and an eccentric member 32 .

[0176] The movable component 200 is mounted on the mounting component 100 so as to be reciprocally slidable along a first direction H1. The mounting component 100 is provided with a first support surface 11, and the movable component 200 is provided with a second support surface 21. The first support surface 11 and the second support surface 21 are disposed opposite each other along the first direction H1. One of the first support surface 11 and the second support surface 21 is configured to abut against the tibial osteotomy surface, while the other of the first support surface 11 and the second support surface 21 is configured to abut against the femoral osteotomy surface. The distance between the first support surface 11 and the second support surface 21 indicates the gap between the tibial and femoral osteotomy surfaces.

[0177] The eccentric member 32 is mounted on the mounting component 100 so as to be rotatable about a first axis L1. The eccentric member 32 is provided with a first eccentric structure 322. The first eccentric structure 322 is eccentrically disposed relative to the first axis L1 and is in transmission connection with the movable component 200. This allows the eccentric member 32 to rotate about the first axis L1 and drive the movable component 200 to slide in a first direction H1. The maximum sliding distance of the movable component 200 is less than or equal to the eccentricity of the first eccentric structure 322.

[0178] Then, after the eccentric member 32 drives the movable component 200 to slide along the first direction H1, the distance between the first support surface 11 and the second support surface 21 can be adjusted. This distance, or the distance between the first support surface 11 and the second support surface 21, is used to indicate the gap between the tibial osteotomy surface and the femoral osteotomy surface. Therefore, during surgery, after the tibial and femoral osteotomies are completed, the user can place the movable component 200 and the mounting component 100 between the knee joints so that one of the first support surface 11 and the second support surface 21 abuts the tibial osteotomy surface and the other of the first support surface 11 and the second support surface 21 abuts the femoral osteotomy surface; then, by rotating the eccentric member 32, the distance between the first support surface 11 and the second support surface 21 is adjusted. When the distance between the first support surface 11 and the second support surface 21 is adjusted to different sizes, the patient's lower leg can be rotated between flexion and extension positions, and the flexion gap and extension gap suitable for the patient can be measured, thereby facilitating the subsequent selection of a suitable prosthesis for implantation into the patient's knee joint based on the flexion gap and extension gap suitable for the patient.

[0179] It is understandable that the distance that the eccentric member 32 drives the movable component 200 to slide in the first direction H1 can theoretically be twice the eccentricity of the first eccentric structure 322. However, when the distance that the eccentric member 32 drives the movable component 200 to slide in the first direction H1 is twice the eccentricity of the first eccentric structure 322, the mounting component 100 needs to be thicker, resulting in a thicker overall gap measurement device. In contrast, the maximum distance that the first eccentric structure 322 drives the movable component 200 to slide is less than or equal to the eccentricity of the first eccentric structure 322, which both meets actual measurement requirements and avoids increasing the overall thickness of the gap measurement device.

[0180] In some embodiments, the first axis L1 may be substantially perpendicular to the first direction H1. Of course, in some other embodiments, the first axis L1 may also be parallel to the first direction H1, which is not limited in this embodiment of the present application.

[0181] In some embodiments, the mounting component 100 is provided with a mounting groove 17 and a mounting hole 13 that are interconnected. The eccentric member 32 is mounted in the mounting hole 13 so as to be rotatable about the first axis L1. A transmission portion 22 is provided protrudingly on a side of the movable component 200 facing away from the second support surface 21. The transmission portion 22 is disposed in the mounting groove 17 so as to be movable along the first direction H1. The transmission portion 22 is in transmission connection with the first eccentric structure 322, so that rotation of the eccentric member 32 about the first axis L1 can drive the transmission portion 22 to move along the first direction H1.

[0182] Furthermore, by opening corresponding holes or groove structures in the mounting component 100 to accommodate the transmission structure of the rotating part 31 and the movable part 200, the gap measuring device can be made smaller and more compact, so that the user can more conveniently insert it into the knee joint, and avoid discomfort caused by the gap measuring device being too large and compressing the tissues at the knee joint.

[0183] In some embodiments, the transmission portion 22 is provided with a second eccentric structure 221. One of the first eccentric structure 322 and the second eccentric structure 221 is a slide groove, and the other of the first eccentric structure 322 and the second eccentric structure 221 is a boss that is slidably mounted in the slide groove, so that the rotation of the eccentric member 32 about the first axis L1 can drive the movable component 200 to slide along the first direction H1.

[0184] In some embodiments, the gap measurement device further includes a rotating member 31. The rotating member 31 is rotatably mounted on the mounting component 100 about the first axis L1. One end of the rotating member is exposed from the outer surface of the mounting component 100 so as to be driven by an external force to rotate about the first axis L1. One end of the rotating member 31 is connected to the eccentric member 32 so that rotation of the rotating member 31 about the first axis L1 drives rotation of the eccentric member 32 about the first axis L1.

[0185] Therefore, when the user needs to adjust the movable component 200 , the user can rotate the rotating member 31 , thereby driving the eccentric member 32 to rotate through the rotating member 31 .

[0186] Please continue to refer to Figure 15 , Figure 15 for Figure 1Schematic diagram of another limiting structure of the rotating member in the gap measuring device shown. In some embodiments, in order to allow the rotating member 31 to be suspended and fixed at a suitable angle to fix the distance between the first support surface 11 and the second support surface 21, one of the rotating member 31 and the mounting component 100 is provided with a plurality of first limiting structures 12a, and the plurality of first limiting structures 12a are spaced apart around the first axis L1, and the other of the rotating member 31 and the mounting component 100 is provided with a second limiting structure 311a. When the rotating member 31 rotates to different angles around the first axis L1, the second limiting structure 311a can cooperate with different first limiting structures 12a, thereby limiting the rotation of the rotating member 31. When the second limiting structure 311a cooperates with different first limiting structures 12a, the distance between the first support surface 11 and the second support surface 21 is different.

[0187] For example, the mounting component 100 has a mounting hole 13, and the rotating member 31 is inserted into the mounting hole 13. One of the first limiting structure 12a and the second limiting structure 311a is an elastic member, and the other is a limiting hole. Therefore, the elastic member can be stretched and snapped into the limiting hole, thereby applying a damping force to the rotating member 31, limiting its rotation. When the rotating member 31 receives a large torque, the elastic member is compressed and withdrawn from the limiting hole, allowing the rotating member 31 to rotate.

[0188] For example, the first limiting structure 12 a may include a limiting hole provided on the inner wall of the mounting hole 13 , and the second limiting structure 311 a may include an elastic telescopic member provided on the peripheral side of the rotating member 31 .

[0189] Optionally, the first limiting structure 12 a may include a limiting hole provided on the circumference of the rotating member 31 , and the second limiting structure 311 a may include an elastic telescopic member provided on the inner wall of the mounting hole 13 .

[0190] Optionally, the first limiting structure 12 a may include an elastic telescopic member provided on the inner wall of the mounting hole 13 , and the second limiting structure 311 a may include a limiting hole provided on the circumference of the rotating member 31 .

[0191] Optionally, the first limiting structure 12 a may include an elastic telescopic member provided on the circumference of the rotating member 31 , and the second limiting structure 311 a may include a limiting hole provided on the inner wall of the mounting hole 13 .

[0192] The elastic telescopic part can be a glass bead spring, or any other elastic telescopic part, and the embodiments of the present application do not limit this.

[0193] In some embodiments, the specific structures of the first limiting structure 12a and the second limiting structure 311a can refer to the above-mentioned groove 12 and protrusion 311 respectively, and the embodiment of the present application does not limit this.

[0194] In some embodiments, the specific structures of the mounting component 100, the movable component 200, and the eccentric component 32 can refer to the above-mentioned mounting component 100, the movable component 200, and the eccentric component 32, respectively, and the embodiments of the present application do not limit this.

[0195] In some embodiments, the gap measuring device may further include an elastic member 33 . The specific structure of the elastic member 33 may refer to the elastic member 33 described above, and will not be described in detail in the embodiment of the present application.

[0196] Please combine Figure 4 and Figure 5 , an embodiment of the present application further provides a gap measuring device, which may include a mounting component 100 , a movable component 200 and an adjusting component 300 .

[0197] The movable component 200 is mounted on the mounting component 100 so as to be reciprocally slidable along a first direction H1. The mounting component 100 is provided with a first support surface 11. The movable component 200 is provided with a second support surface 21. The first support surface 11 and the second support surface 21 are disposed opposite each other along the first direction H1. One of the first support surface 11 and the second support surface 21 is configured to abut against a tibial osteotomy surface. The other of the first support surface 11 and the second support surface 21 is configured to abut against a femoral osteotomy surface. The distance between the first support surface 11 and the second support surface 21 indicates the gap between the tibial osteotomy surface and the femoral osteotomy surface.

[0198] The adjusting component 300 is disposed through the mounting component 100 and is rotatable about the first axis L1. The adjusting component 300 is provided with a first eccentric structure 322. The first eccentric structure 322 is eccentrically disposed with respect to the first axis L1.

[0199] The movable component 200 is provided with a transmission part 22. The transmission part 22 is located on one side of the adjustment component 300 along the first axis L1. The first eccentric structure 322 can reciprocate along the first axis L1 to be in transmission connection with or separation from the transmission part 22.

[0200] When the first eccentric structure 322 is in transmission connection with the transmission portion 22 , the rotation of the adjusting component 300 around the first axis L1 can drive the movable component 200 to slide along the first direction H1 .

[0201] Then, after the movable component 200 is driven to slide along the first direction H1 by the adjustment component 300, the distance between the first support surface 11 and the second support surface 21 can be adjusted. This distance, or the distance between the first support surface 11 and the second support surface 21, is used to indicate the gap between the tibial osteotomy surface and the femoral osteotomy surface. Therefore, during surgery, after the tibial and femoral osteotomies are completed, the user can place the movable component 200 and the mounting component 100 between the knee joints so that one of the first support surface 11 and the second support surface 21 abuts the tibial osteotomy surface and the other of the first support surface 11 and the second support surface 21 abuts the femoral osteotomy surface. Then, the distance between the first support surface 11 and the second support surface 21 is adjusted by rotating the adjustment component 300. When the distance between the first support surface 11 and the second support surface 21 is adjusted to different sizes, the patient's lower leg can be rotated between flexion and extension positions, thereby measuring the flexion gap and extension gap suitable for the patient, thereby facilitating the subsequent selection of a suitable prosthesis for implantation into the patient's knee joint based on the flexion gap and extension gap suitable for the patient.

[0202] Please combine Figure 6 and Figure 8 The transmission portion 22 also has a disassembly hole 222 extending along the first axis L1. One end of the disassembly hole 222 faces the adjustment member 300. The other end of the disassembly hole 222 is located on the outer surface of the movable member 200. The disassembly hole 222 is used to allow a first external instrument to be inserted, thereby pushing the adjustment member 300 until the first eccentric structure separates from the transmission portion 22, thereby allowing the movable member 200 to slide along the first direction H1 and separate from the mounting member 100.

[0203] Furthermore, the gap measuring device can be disassembled by a first external instrument such as a long rod, thereby facilitating cleaning and disinfection of the entire gap measuring device.

[0204] In some embodiments, the mounting component 100 is provided with a mounting slot 17 and a mounting hole 13 that are interconnected. The adjustment component 300 is mounted in the mounting hole 13 so as to be rotatable about a first axis L1, which is substantially perpendicular to the first direction H1. A transmission portion 22 is provided protrudingly on a side of the movable component 200 facing away from the second support surface 21. The transmission portion 22 is disposed in the mounting slot 17 so as to be movable along the first direction H1. The transmission portion 22 is in transmission connection with the first eccentric structure 322, such that rotation of the adjustment component 300 about the first axis L1 drives the transmission portion 22 to move along the first direction H1.

[0205] Furthermore, by opening corresponding holes or groove structures in the mounting component 100 to accommodate the transmission structure of the rotating part 31 and the movable part 200, the gap measuring device can be made smaller and more compact, so that the user can more conveniently insert it into the knee joint, and avoid discomfort caused by the gap measuring device being too large and compressing the tissues at the knee joint.

[0206] In some embodiments, the transmission portion 22 is provided with a second eccentric structure 221. One of the first eccentric structure 322 and the second eccentric structure 221 is a slide groove, and the other of the first eccentric structure 322 and the second eccentric structure 221 is a boss. The boss is slidably mounted within the slide groove, so that rotation of the adjustment component 300 about the first axis L1 can drive the movable component 200 to slide along the first direction H1.

[0207] In some embodiments, the specific structures of the installation component 100 and the movable component 200 can refer to the above-mentioned installation component 100 and the movable component 200 respectively, and the embodiments of the present application are not limited to this.

[0208] In some embodiments, the adjusting component 300 may include a rotating component 31, an eccentric component 32 and an elastic component 33. The specific structures of the rotating component 31, the eccentric component 32 and the elastic component 33 can be referred to the above-mentioned rotating component 31, the eccentric component 32 and the elastic component 33, and the embodiments of the present application do not limit this.

[0209] Please continue to combine Figure 8 and Figure 16 , Figure 16 This is a flow chart of a method for disassembling a gap measuring device provided in an embodiment of the present application. This embodiment of the present application also provides a method for disassembling the gap measuring device, comprising the following steps:

[0210] S601 , inserting an external instrument into the disassembly hole 222 to push the adjustment component until the first eccentric structure 322 is separated from the transmission part 22 .

[0211] S602 , sliding the movable component 200 and the external instrument synchronously along the first direction H1 , so that the movable component 200 moves to be separated from the mounting component 100 .

[0212] Therefore, the gap measuring device can be disassembled by an external instrument such as a long rod, thereby facilitating the cleaning and disinfection of the entire gap measuring device.

[0213] In some embodiments, after the movable component 200 moves to be separated from the installation component 100 , the disassembly method further includes: removing the adjustment component 300 from the installation component 100 .

[0214] For example, removing the adjusting component 300 from the mounting component 100 may include removing the eccentric member 32 , the elastic member 33 and the rotating member 31 from the mounting hole 13 of the mounting component 100 in sequence.

[0215] This allows the entire gap measuring device to be cleaned and disinfected.

[0216] It can also be understood that when the rotating member 31 and the mounting component 100 are limited by the cooperation of the groove 12 and the protrusion 311, the gap measuring device can also have the advantage of being easier to assemble and disassemble.

[0217] Please continue to refer to Figure 17 , Figure 17 Schematic diagram of the use status of the gap measuring device kit provided in an embodiment of the present application. Based on the above-mentioned gap measuring device, an embodiment of the present application also provides a gap measuring device kit, including a gap measuring device, a first surgical instrument 400 and a second surgical instrument 500. The gap measuring device is the above-mentioned gap measuring device. The first surgical instrument 400 is fixedly connected or detachably connected to the gap measuring device, and the first surgical instrument 400 is used for the user to insert the gap measuring device into the knee joint or remove it from the knee joint. The second surgical instrument 500 is detachably connected to the gap measuring device. The second surgical instrument 500 is used for the user to rotate the rotating member 31, the eccentric member 32 or the adjusting member 300.

[0218] For example, the first surgical instrument 400 may be a quick-release handle, and the second surgical instrument 500 may be a screwdriver, etc., which is not limited in the present embodiment. In the above embodiments, the description of each embodiment has its own focus. For parts not described in detail in one embodiment, please refer to the relevant description of other embodiments.

[0219] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0220] The above is a detailed introduction to the gap measuring device, disassembly method, and kit provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A gap measuring device, It is characterized in that Includes mounting parts, moving parts and rotating parts; The movable component can be mounted on the mounting component in a reciprocating and slidable manner along a first direction, the mounting component is provided with a first supporting surface, and the movable component is provided with a second supporting surface, the first supporting surface and the second supporting surface are arranged opposite to each other along the first direction, one of the first supporting surface and the second supporting surface is used to abut against a tibial osteotomy surface, and the other of the first supporting surface and the second supporting surface is used to abut against a femoral osteotomy surface; The rotating member is rotatably mounted on the mounting member around a first axis, and the rotating member is transmission-connected to the movable member so that the rotation of the rotating member around the first axis can drive the movable member to slide back and forth along the first direction; One of the rotating member and the mounting member is fixedly provided with a protrusion, and the other of the rotating member and the mounting member is provided with a plurality of grooves, wherein the plurality of grooves are arranged at intervals around the first axis; Wherein, the rotating member can reciprocate along a second direction so that the protrusion enters or escapes from any one of the plurality of grooves, and the second direction is substantially parallel to the first axis; When the protrusion is disengaged from the groove, the rotating member can rotate around the first axis; When the protrusion enters any one of the grooves, the protrusion restricts the rotating member from rotating around the first axis; When the protrusions are located in different grooves, the distances between the first support surface and the second support surface are different, and the distances are used to indicate the gap between the tibial osteotomy surface and the femoral osteotomy surface.

2. The gap measuring device according to claim 1, It is characterized in that The second supporting surface is located on a side of the movable component away from the mounting component along the first direction; and / or The first supporting surface is located on a side of the mounting component away from the second supporting surface along the first direction; and / or The mounting component further includes a first side wall, the first side wall is connected to the first supporting surface and extends toward the second supporting surface, and the rotating member is mounted on the first side wall.

3. The gap measuring device according to claim 1, It is characterized in that The mounting component is provided with a mounting groove and a mounting hole which are interconnected; The rotating member is mounted in the mounting hole so as to be rotatable around the first axis, and the first axis is substantially perpendicular to the first direction; A transmission part is protruding from the side of the movable component away from the second supporting surface. The transmission part is movably arranged in the installation groove along the first direction. The transmission part is transmission-connected to the rotating member so that the rotation of the rotating member around the first axis can drive the transmission part to move along the first direction.

4. The gap measuring device according to claim 3, It is characterized in that The gap measuring device further comprises an eccentric member, wherein the eccentric member is connected to the rotating member so that the rotation of the rotating member around the first axis can drive the eccentric member to rotate around the first axis; The eccentric member is provided with a first eccentric structure, which is eccentrically arranged with respect to the first axis and is transmission-connected with the transmission part, so that the rotation of the first eccentric structure around the first axis can drive the movable part to slide along the first direction.

5. The gap measuring device according to claim 4, It is characterized in that The inner wall of the mounting hole is provided with a step surface facing the transmission part; The eccentric member is at least partially disposed in the mounting hole, one end of the rotating member away from the eccentric member abuts against the step surface, and one end of the eccentric member away from the step surface abuts against the transmission part to limit the eccentric member and the rotating member from being separated from the mounting hole.

6. The gap measuring device according to claim 5, It is characterized in that A plurality of grooves are arranged on the inner wall of the mounting hole and extend from the step surface to the end surface of the mounting hole on one side away from the transmission part. The protrusion is arranged on the outer peripheral side of the rotating part and slidably cooperates with the grooves.

7. The gap measuring device according to claim 4, It is characterized in that The rotating member includes a rotating body and a first transmission structure, wherein the first transmission structure is at least partially located on a side of the rotating body facing the transmission part, the eccentric member includes a main body and a second transmission structure, wherein the second transmission structure is at least partially located on a side of the main body away from the transmission part, and the first transmission structure and the second transmission structure are slidably connected so that the eccentric member and the rotating member can move relative to each other along the first axis, and the rotating member can drive the eccentric member to rotate around the first axis; wherein, One of the first transmission structure and the second transmission structure is a transmission shaft, the other of the first transmission structure and the second transmission structure is a transmission hole, and the transmission shaft is inserted into the transmission hole; and / or The gap measuring device further includes an elastic member, which is compressed and arranged between the rotating body and the main body.

8. The gap measuring device according to claim 4, It is characterized in that The eccentric member is mounted on the rotating member so as to be reciprocatingly movable along the second direction, so that the eccentric member can move along the second direction to be transmission-connected with or separated from the transmission part; The transmission part is also provided with a disassembly hole, which extends along the first axial direction, with one end of the disassembly hole facing the eccentric piece, and the other end of the disassembly hole being located on the outer surface of the movable part. The disassembly hole is used for inserting a first external instrument to push the eccentric piece until the first eccentric structure is separated from the transmission part, so that the movable part can slide along the first direction to be separated from the mounting part.

9. The gap measuring device according to claim 8, It is characterized in that The first eccentric structure is at least partially located on a side of the eccentric member facing away from the rotating member; The transmission part is provided with a second eccentric structure, and the second eccentric structure is at least partially located on a side of the transmission part facing the rotating member; Among them, one of the first eccentric structure and the second eccentric structure is a slide groove, and the other of the first eccentric structure and the second eccentric structure is a convex column, and the convex column is slidably installed in the slide groove, so that the eccentric part follows the rotation of the rotating part and drives the movable part to slide along the first direction.

10. The gap measuring device according to claim 8, It is characterized in that The transmission part is further provided with a first weight-reducing hole, and the first weight-reducing hole is communicated with the disassembly hole.

11. The gap measuring device according to claim 4, It is characterized in that The eccentric member and the rotating member are integrally formed; The gap measuring device also includes an elastic member, which is at least partially disposed in the mounting hole, and is used to drive the eccentric member or the rotating member to move along the second direction so that the protrusion enters the groove.

12. The gap measuring device according to claim 4, It is characterized in that The maximum distance that the eccentric member drives the movable component to slide is less than or equal to the eccentricity of the first eccentric structure.

13. The gap measuring device according to claim 4, It is characterized in that During the sliding of the movable component, the first supporting surface and the second supporting surface are always located at different sides of the rotating member along the first direction; and / or During the sliding of the movable component, the first supporting surface and the second supporting surface are always located on different sides of the eccentric member along the first direction; and / or During the sliding of the movable component, the movable component, the mounting component, the rotating component and the eccentric component form an integral component, and the first supporting surface and the second supporting surface respectively form different end surfaces of the integral component along the first direction.

14. The gap measuring device according to claim 1, It is characterized in that The mounting component is provided with a mounting hole, a plurality of the grooves are arranged around the first axis and arranged on the hole wall of the mounting hole, the rotating member is passed through the mounting hole, and the protrusion protrudes from the outer peripheral side of the rotating member; or The mounting component is provided with a mounting hole, the protrusion protrudes from the hole wall of the mounting hole, the rotating member is penetrated through the mounting hole, and the plurality of grooves are arranged around the first axis on the outer peripheral side of the rotating member.

15. The gap measuring device according to claim 14, It is characterized in that The outer surface of the mounting component is provided with a first indicator mark, which is located at the end surface of the hole opening of the mounting hole to indicate the distance between the first supporting surface and the second supporting surface and / or the thickness of the meniscus prosthesis corresponding to the distance.

16. The gap measuring device according to claim 1, It is characterized in that The number of the protrusions is at least two, and at least two of the protrusions are spaced apart around the first axis.

17. The gap measuring device according to any one of claims 1 to 16, It is characterized in that A first avoidance groove is provided on one side of the installation component for first placement into the knee joint, and the notch of the first avoidance groove faces the same direction as the direction in which the installation component is placed into the knee joint; and / or A second avoidance groove is provided on the side of the movable component that is first inserted into the knee joint, and the notch of the second avoidance groove faces the same direction as the direction in which the movable component is inserted into the knee joint.

18. The gap measuring device according to claim 17, It is characterized in that The first avoidance groove and the second avoidance groove are used to avoid the cruciate ligament.

19. The gap measuring device according to claim 17, It is characterized in that The mounting component includes a first side wall, the first side wall is connected to the first supporting surface and extends toward the second supporting surface, and a device hole is further provided on a side of the first side wall away from the first avoidance groove, the device hole is used for inserting a second external device, so that a user can move the mounting component through the second external device; The first side wall is also provided with a mounting hole, the rotating member is rotatably disposed in the mounting hole, and the mounting hole and the instrument hole are spaced apart along the circumferential direction of the first side wall.

20. The gap measuring device according to claim 19, It is characterized in that The mounting component is provided with at least one first guide structure, the movable component is provided with at least one second guide structure, and each of the first guide structures is slidably connected with the second guide structure along the first direction; Among them, at least one of the first guide structures is located on a side of the installation component close to the first avoidance groove 14 .

21. The gap measuring device according to claim 20, It is characterized in that The number of the first guide structures is multiple; wherein, At least three of the first guiding structures are distributed in a triangular shape; and / or At least two of the first guide structures are relatively arranged on different sides of the first supporting surface.

22. The gap measuring device according to claim 17, It is characterized in that Along the length direction of the first supporting surface, the maximum length of the first supporting surface is greater than or equal to 60.4 mm and less than or equal to 86 mm, and the length direction of the first supporting surface is substantially perpendicular to the direction in which the mounting component is inserted into the knee joint; along the width direction of the first supporting surface, the width from the bottom wall of the first avoidance groove to the side of the first supporting surface facing away from the first avoidance groove is greater than or equal to 39 mm and less than or equal to 57 mm; and / or Along the length direction of the second supporting surface, the maximum length of the second supporting surface is greater than or equal to 60.4 mm and less than or equal to 86 mm, and the length direction of the second supporting surface is approximately perpendicular to the direction in which the mounting component is inserted into the knee joint; along the width direction of the second supporting surface, the width from the bottom wall of the second avoidance groove to the side of the second supporting surface facing away from the second avoidance groove is greater than or equal to 39 mm and less than or equal to 57 mm.

23. The gap measuring device according to any one of claims 1 to 16, It is characterized in that At least 50% of the outer contour of the first support surface can match the outer peripheral contour of a standard tibial plateau prosthesis component; and / or At least 50% of the outer contour of the second support surface can be matched with the outer peripheral contour of a standard tibial plateau prosthesis component.

24. The gap measuring device according to any one of claims 1 to 16, It is characterized in that The rotating member is configured to follow the mounting component and be at least partially placed between the tibial osteotomy surface and the femoral osteotomy surface.

25. The gap measuring device according to claim 24, It is characterized in that The orthographic projection of the rotating member on the second supporting surface at least partially overlaps with the second supporting surface.

26. The gap measuring device according to claim 24, It is characterized in that At least 80% of an area of ​​an orthographic projection of the rotating member on the second supporting surface coincides with the second supporting surface.

27. The gap measuring device according to any one of claims 1 to 16, It is characterized in that The number of the rotating member and the number of the movable members are at least two, and each movable member is drivingly connected to a different rotating member.

28. A gap measuring device, It is characterized in that It includes mounting parts, moving parts and eccentric parts; The movable component can be mounted on the mounting component in a reciprocating and slidable manner along a first direction, the mounting component is provided with a first supporting surface, and the movable component is provided with a second supporting surface, the first supporting surface and the second supporting surface are arranged opposite to each other along the first direction, one of the first supporting surface and the second supporting surface is used to abut against a tibial osteotomy surface, and the other of the first supporting surface and the second supporting surface is used to abut against a femoral osteotomy surface, and the distance between the first supporting surface and the second supporting surface is used to indicate the gap between the tibial osteotomy surface and the femoral osteotomy surface; The eccentric piece can be installed on the installation component so as to rotate around a first axis. The eccentric piece is provided with a first eccentric structure. The first eccentric structure is eccentrically arranged with respect to the first axis and is transmission-connected with the movable component so that the rotation of the eccentric piece around the first axis can drive the movable component to slide along the first direction; wherein the maximum sliding distance of the movable component is less than or equal to the eccentric distance of the first eccentric structure.

29. The gap measuring device according to claim 28, It is characterized in that The mounting component is provided with a mounting groove and a mounting hole which are interconnected; The eccentric member is mounted in the mounting hole so as to be rotatable around the first axis, and the first axis is substantially perpendicular to the first direction; A transmission part is protruding from the side of the movable component away from the second supporting surface. The transmission part is movably arranged in the installation groove along the first direction. The transmission part is transmission-connected to the first eccentric structure so that the rotation of the eccentric part around the first axis can drive the transmission part to move along the first direction.

30. The gap measuring device according to claim 29, It is characterized in that The transmission part is provided with a second eccentric structure; Among them, one of the first eccentric structure and the second eccentric structure is a slide groove, and the other of the first eccentric structure and the second eccentric structure is a convex column, and the convex column is slidably installed in the slide groove, so that the rotation of the eccentric member around the first axis can drive the movable part to slide along the first direction.

31. The gap measuring device according to claim 28, It is characterized in that The gap measuring device also includes a rotating member, which is rotatably arranged on the mounting component around the first axis, one end of the rotating member is exposed from the outer surface of the mounting component so as to be driven by an external force to rotate around the first axis, and one end of the rotating member is connected to the eccentric member so that the rotation of the rotating member around the first axis can drive the rotation of the eccentric member around the first axis.

32. A gap measuring device, It is characterized in that Including installation parts, moving parts and adjustment parts; The movable component can be mounted on the mounting component in a reciprocating and slidable manner along a first direction, the mounting component is provided with a first supporting surface, and the movable component is provided with a second supporting surface, the first supporting surface and the second supporting surface are arranged opposite to each other along the first direction, one of the first supporting surface and the second supporting surface is used to abut against a tibial osteotomy surface, and the other of the first supporting surface and the second supporting surface is used to abut against a femoral osteotomy surface, and the distance between the first supporting surface and the second supporting surface is used to indicate the gap between the tibial osteotomy surface and the femoral osteotomy surface; The adjusting component is inserted through the mounting component and can rotate around a first axis, and the adjusting component is provided with a first eccentric structure, and the first eccentric structure is eccentrically arranged with respect to the first axis; The movable component is provided with a transmission part, and the transmission part is located on one side of the adjusting component along the first axis direction. The first eccentric structure can reciprocate along the first axis direction to be transmission-connected with or separated from the transmission part. When the first eccentric structure is transmission-connected with the transmission part, the rotation of the adjusting component around the first axis can drive the movable component to slide along the first direction. The transmission part is also provided with a disassembly hole, which extends along the first axial direction, with one end of the disassembly hole facing the adjusting component, and the other end of the disassembly hole being located on the outer surface of the movable component. The disassembly hole is used for allowing a first external instrument to be inserted and then push the adjusting component until the first eccentric structure is separated from the transmission part, so that the movable component can slide along the first direction until it is separated from the mounting component.

33. The gap measuring device according to claim 32, It is characterized in that The mounting component is provided with a mounting groove and a mounting hole which are interconnected; The adjusting component is mounted on the mounting hole so as to be rotatable around the first axis, and the first axis is substantially perpendicular to the first direction; A transmission part is protruding from the side of the movable component away from the second supporting surface. The transmission part is movably arranged in the installation groove along the first direction. The transmission part is transmission-connected to the first eccentric structure so that the rotation of the adjustment component around the first axis can drive the transmission part to move along the first direction.

34. The gap measuring device according to claim 33, It is characterized in that The transmission part is provided with a second eccentric structure; Among them, one of the first eccentric structure and the second eccentric structure is a slide groove, and the other of the first eccentric structure and the second eccentric structure is a convex column, and the convex column is slidably installed in the slide groove, so that the rotation of the adjusting component around the first axis can drive the movable component to slide along the first direction.

35. A disassembly method implemented based on the gap measuring device according to any one of claims 31 to 34, It is characterized in that The steps include: Inserting an external instrument from the disassembly hole to push the adjustment component until the first eccentric structure is separated from the transmission part; The movable component is slid synchronously with the external instrument along the first direction so that the movable component moves to be separated from the mounting component.

36. A gap measuring device kit, It is characterized in that include: The gap measuring device according to any one of claims 1 to 34; a first surgical instrument, fixedly connected or detachably connected to the gap measuring device, the first surgical instrument being used for a user to insert the gap measuring device into a knee joint or remove it from the knee joint; and A second surgical instrument is detachably connected to the gap measuring device, and the second surgical instrument is used for a user to rotate a rotating part, an eccentric part or an adjusting part.

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