A femoral head compression device and apparatus

Abstract

The application relates to the technical field of medical operation tools, in particular to a femoral head pressing device and equipment, wherein the femoral head pressing device comprises an outer sleeve, an extension column and a support plate; the outer sleeve is a cylindrical sleeve structure, an axial cavity is arranged in the inner part, and the two ends in the axial direction are respectively an open end and a closed end; a working opening is arranged on the side wall of the outer sleeve; the extension column is arranged in the axial cavity and directly or indirectly controlled by an operator to move along the axial direction of the axial cavity; the support plate is arranged at the working opening and controlled by the extension column to be pushed out or withdrawn at the working opening. Through the thread cooperation design of the combined core column and the outer sleeve, the axial movement of the extension column can be conveniently controlled by rotating the combined core column by an operator, the pushing out or withdrawing of the support plate is further controlled, and the pressure in the femoral head operation is realized.

Description

Technical Field

[0001] This application relates to the field of medical surgical tools technology, and in particular to a femoral head compression device and equipment. Background Technology

[0002] Avascular necrosis of the femoral head, also known as ischemic necrosis or aseptic necrosis of the femoral head, is a relatively common osteoarthritis. It is mostly caused by rheumatic diseases, blood disorders, decompression sickness, excessive use of hormones, and long-term alcohol consumption. It initially disrupts the blood supply to the tissues adjacent to the joint surface, leading to necrosis. The main symptoms of avascular necrosis of the femoral head progress from intermittent pain to persistent pain, then to muscle spasms and restricted joint movement, ultimately causing severe disability and lameness. Early and mid-stage treatment of avascular necrosis of the femoral head is a current challenge in orthopedics. Although there are many treatment methods, the efficacy is generally unsatisfactory, often progressing to collapse or worsening existing collapse, ultimately necessitating hip replacement surgery.

[0003] However, avascular necrosis of the femoral head mostly occurs in patients aged 30-50, making premature total hip replacement unsuitable. Furthermore, total hip replacement is less effective for avascular necrosis of the femoral head compared to other diseases. Femoral head reconstruction surgery, which involves removing necrotic bone and filling the defect with bone cement or other media, is a relatively new treatment for avascular necrosis of the femoral head. Its design principle is: after removing necrotic bone, the defect is filled with bone substitute materials or bone cement, repositioning the collapsed cartilage surface and reconstructing the rounded contour of the femoral head, preserving the hip joint itself, and potentially eliminating or delaying total joint replacement surgery.

[0004] The hallmark of successful hip preservation in femoral head necrosis is the formation of stable sclerotic bone within the femoral head. However, while there are currently reamers specifically designed for removing necrotic bone from within the femur, there are no pressure-applying tools for removing necrotic bone from within the femoral head. Utility Model Content

[0005] The purpose of this application is to provide a femoral head compression device and equipment to solve at least one of the technical problems existing in the prior art.

[0006] To solve the above-mentioned technical problems, this application provides a femoral head compression device, including an outer sleeve, a telescopic column, and a support plate; The outer sleeve is a cylindrical structure with an internal axial cavity, and the two ends in the axial direction are an open end and a closed end, respectively. A working opening is provided on the side wall of the outer sleeve; The telescopic column is disposed within the axial cavity and is directly or indirectly controlled by the operator to move along the axial direction of the axial cavity; The support plate is positioned at the working opening and is pushed out or retracted at the working opening under the control of the telescopic column.

[0007] Furthermore, it also includes a motion transmission assembly for controlling the support plate with the telescopic column.

[0008] Furthermore, after being compressed by the telescopic column, the motion transmission component transmits the axial movement of the telescopic column as radial movement of the support plate at the working opening.

[0009] Furthermore, the motion transmission assembly includes a first motion transmission device and a second motion transmission device disposed opposite to each other; The first motion transmission device is connected to the axial inner wall of the outer sleeve cavity; The second motion transmission device is connected to one end of the telescopic column near the closed end; The support plate is disposed at the working opening and is connected to the first motion transmission device and the second motion transmission device; When the operator controls the telescopic column to move towards the side closer to the closed end, the motion transmission component is deflected by the pressure from the telescopic column, thereby pushing the support plate to move away from the outer sleeve and abut against the femur.

[0010] Furthermore, the first motion transmission device includes a first movable plate and a first elastic element; The first elastic element is fixedly connected at both ends to the first movable plate and the inner wall of the axial cavity, respectively. The first movable plate is provided with a first connecting part and a second connecting part; The first connecting part is riveted to the inner wall of the axial cavity; The second connecting part is movably riveted to the support plate.

[0011] Furthermore, the first connecting portion and the second connecting portion are symmetrically arranged on the first movable plate; In the initial state, the angle between the axial direction of the first elastic element and the line connecting the first connecting part and the second connecting part is not less than 60 degrees and not greater than 85 degrees.

[0012] Furthermore, in the initial state, the height of the movable riveting joint between the first connecting part and the inner wall of the axial cavity is lower than the height of the movable riveting joint between the second connecting part and the support plate.

[0013] Furthermore, the second motion transmission device includes a second movable plate and a second elastic element; The two ends of the second elastic element are fixedly connected to the second movable plate and the inner wall of the axial cavity, respectively; The second movable plate is provided with a third connecting part and a fourth connecting part; The third connecting part is movably riveted to the telescopic column; The fourth connecting part is movably riveted to the support plate.

[0014] Furthermore, the third connecting portion and the fourth connecting portion are symmetrically arranged on the second movable plate; In the initial state, the angle between the axial direction of the second elastic element and the line connecting the third and fourth connecting parts is not less than 60 degrees and not greater than 85 degrees.

[0015] Furthermore, the height of the third connecting part and the movable riveting joint of the telescopic column is lower than the height of the fourth connecting part and the movable riveting joint of the support plate.

[0016] Furthermore, it also includes a combined core column for controlling the telescopic column to move axially along the axial cavity under the operator's control; One end of the combined core column is disposed in the axial cavity and connected to the end of the telescopic column, while the other end is exposed outside the outer sleeve and is controlled by the operator to move along the axial direction of the axial cavity.

[0017] Furthermore, the side wall of the combined core column away from the support plate is provided with external threads; The outer sleeve is provided with a meshing part, and the meshing part is provided with an internal thread that meshes with the external thread on the combined core column; After the external thread engages with the internal thread, rotating the combined core column causes it to move along the axial direction of the axial cavity, thereby driving the telescopic column to move.

[0018] Furthermore, the combined core column and the telescopic column are connected by bearings.

[0019] Furthermore, a concave-convex connecting pair is provided between the combined core column and the telescopic column to realize the guiding transmission between the combined core column and the telescopic column.

[0020] Furthermore, the concave-convex connection pair includes a tapered protrusion disposed on the combined core column or the telescopic column, a tapered groove disposed on the telescopic column or the combined core column, and a tapered bearing between the tapered protrusion and the tapered groove.

[0021] Furthermore, the end of the combined core column away from the telescopic column is provided with an interface (such as a hexagonal interface, a cross interface, a slotted interface, etc.) or a rotating handle for connecting to electric / manual tools or for manual operation.

[0022] Furthermore, the support plate includes a strip plate and a connecting lug plate; The connecting ear plates are disposed on both sides or the lower end surface of the strip plate and are used to connect with the motion transmission component.

[0023] Furthermore, the cross-sectional shape of the strip plate is cylindrical, elliptical, or spherical.

[0024] Furthermore, when the support plate is lowered to its lowest height, its top exceeds the outer diameter of the outer sleeve, thereby reducing obstruction when the femoral head compression device is inserted into the core tunnel.

[0025] Furthermore, the motion transmission component is a hydraulic bladder or a gear and rack transmission structure.

[0026] Furthermore, the motion transmission component is a hydraulic bladder; The hydraulic bladder is disposed within the axial cavity; The end of the telescopic column abuts against the hydraulic bladder; The bottom of the support plate abuts against the hydraulic bladder; When the telescopic column compresses the hydraulic bladder, the hydraulic bladder transmits pressure to the support plate, thereby converting the axial pressure from the telescopic column into radial pressure on the support plate.

[0027] Furthermore, the motion transmission component is a gear and rack transmission structure; The gear and rack transmission structure includes an axial telescopic rack, a radial telescopic rack, and a transmission gear; The axial telescopic rack is telescopically mounted on the end of the telescopic column and on the inner wall of the axial cavity; The radial telescopic rack is telescopically mounted on the lower end of the support plate and on the inner wall of the axial cavity; The transmission gear meshes with both the axial telescopic rack and the radial telescopic rack. When the telescopic column moves axially, it drives the axial telescopic rack to move, which in turn drives the transmission gear to rotate, thereby driving the radial telescopic rack to move, and finally driving the support plate to move.

[0028] Furthermore, the first motion transmission device includes a first movable plate, a first connecting part, and a second connecting part; The first connecting part is connected to the inner wall of the axial cavity by a torque riveting node; The second connecting part and the support plate are connected by a torque riveting node.

[0029] Furthermore, the second motion transmission device includes a second movable plate, a third connecting part, and a fourth connecting part; The third connecting part and the telescopic column are connected by a torque riveting node. The fourth connecting part and the support plate are connected by a torque riveting node.

[0030] Furthermore, the torque riveting node includes a rivet assembly, a first torsion arm, a second torsion arm, and a third elastic element; The third elastic element is disposed between the first torsion arm and the second torsion arm; The first torsion arm and the second torsion arm are respectively disposed between the two components that are riveted by moving torque, and the components are connected by the rivet assembly.

[0031] On the other hand, this application also discloses a device including a femoral head compression device.

[0032] By adopting the above technical solution, this application has the following beneficial effects: (1) Through the threaded design of the combined core column and the outer sleeve, the operator can easily control the axial movement of the telescopic column by rotating the combined core column, thereby controlling the extension or retraction of the support plate, and realizing the application of pressure in femoral head surgery.

[0033] (2) The use of movable riveting or torque riveting to connect the components not only ensures the stability of the structure, but also adapts to different needs during the operation.

[0034] (3) The axial movement of the telescopic column is efficiently and accurately converted into the radial movement of the support plate through the motion transmission component, ensuring that the support plate can accurately abut against the femur and achieve the pressure effect.

[0035] (4) The design of this device takes into account the needs of different surgical scenarios. By adjusting the parameters of components such as motion transmission components and elastic elements, as well as the shape of the support plate, it can adapt to the femoral morphology and surgical requirements of different patients, thereby improving the versatility and practicality of the device. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 A schematic diagram of the front view structure of the femoral head compression device; Figure 2 A top-view schematic diagram of the femoral head compression device; Figure 3 for Figure 2 A top view of the structural plan without the support plates; Figure 4 A three-dimensional structural diagram of a pressure device for the femoral head; Figure 5Front sectional view of the femoral head compression device in its initial state; Figure 6 Front sectional view of the femoral head compression device in its extended position; Figure 7 for Figure 6 Enlarged view of a section of the central support plate; Figure 8 for Figure 6 A magnified view of a portion of the concave-convex joint; Figure 9 A front sectional view of the femoral head compression device with an elliptical support plate in its initial state; Figure 10 A front sectional view of the femoral head compression device equipped with an elliptical support plate in its extended state; Figure 11 A front sectional view of the femoral head compression device equipped with a spherical support plate in its initial state; Figure 12 A front sectional view of the femoral head compression device equipped with a spherical support plate in its extended state; Figure 13 Schematic diagrams of cross-sections of cylindrical, elliptical, and spherical support plates; Figure 14 This is a front cross-sectional view of the hydraulic bladder used as the motion transmission component in Example 2; Figure 15 This is a front cross-sectional view of the gear and rack transmission structure used as the motion transmission component in Example 2; Figure 16 This is a front sectional view of the femoral head compression device in the open state in Example 3; Figure 17 A cross-sectional view of a torque riveting joint from a first-person perspective; Figure 18 A schematic diagram of the planar structure of the torque riveting joint after removing the third elastic element, from another perspective.

[0038] Figure label: 1-Outer sleeve; 2-Telescopic column; 3-Support plate; 4-Axial cavity; 5-Open end; 6-Closed end; 7-Working opening; 8-First movable plate; 9-First elastic element; 10-First connecting part; 11-Second connecting part; 12-Second movable plate; 13-Second elastic element; 14-Third connecting part; 15-Fourth connecting part; 16-Combined core column; 17-External thread; 18-Meshing part; 19-Internal thread; 20-Conical protrusion; 21-Conical groove; 22-Conical bearing; 23-Strip plate; 24-Connecting ear plate; 25-Hydraulic bladder; 26-Axial telescopic rack; 27-Radial telescopic rack; 28-Transmission gear; 29-Torque riveting node; 30-Rivet assembly; 31-First torsion arm; 32-Second torsion arm; 33-Third elastic element. Detailed Implementation

[0039] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] It should also be noted that the specific embodiments or implementation methods described below are a series of optimized settings listed in this application to further explain the specific application content, and these settings can be combined or used in conjunction with each other.

[0043] The present application will be further explained below with reference to specific implementation methods.

[0044] Example 1 like Figure 1-6 As shown, the femoral head compression device provided in this embodiment includes an outer sleeve 1, a telescopic column 2, and a support plate 3; The outer sleeve 1 is a cylindrical structure with an axial cavity 4 inside, and the two ends of the axial upward are an open end 5 and a closed end 6, respectively. A working opening 7 is provided on the side wall of the outer sleeve 1; The telescopic column 2 is disposed within the axial cavity 4 and is directly or indirectly controlled by the operator to move along the axial direction of the axial cavity 4. The support plate 3 is located at the working opening 7 and is pushed out or retracted at the working opening 7 under the control of the telescopic column 2.

[0045] As a further embodiment of this invention, a motion transmission component for controlling the support plate 3 under the control of the telescopic column 2 is also included.

[0046] As a further embodiment of this example, after being compressed by the telescopic column 2, the motion transmission component transmits the axial movement of the telescopic column 2 as the radial movement of the support plate 3 at the working opening 7.

[0047] like Figure 7 As shown, as a further embodiment of this example, the motion transmission component includes a first motion transmission device and a second motion transmission device disposed opposite to each other. The first motion transmission device is connected to the inner wall of the axial cavity 4 of the outer sleeve 1; The second motion transmission device is connected to one end of the telescopic column 2 near the closed end 6; The support plate 3 is disposed at the working opening 7 and is connected to the first motion transmission device and the second motion transmission device; When the operator controls the telescopic column 2 to move closer to the closed end 6, the motion transmission component is deflected by the pressure from the telescopic column 2, thereby pushing the support plate 3 to move away from the outer sleeve 1 and to abut against the femur.

[0048] As a further embodiment of this embodiment, the first motion transmission device includes a first movable plate 8 and a first elastic member 9; The first elastic element 9 is fixedly connected at both ends to the first movable plate 8 and the inner wall of the axial cavity 4, respectively; The first movable plate 8 is provided with a first connecting part 10 and a second connecting part 11; The first connecting part 10 is riveted to the inner wall of the axial cavity 4; The second connecting part 11 is movably riveted to the support plate 3.

[0049] As a further embodiment of this embodiment, the second motion transmission device includes a second movable plate 12 and a second elastic member 13; The two ends of the second elastic element 13 are fixedly connected to the second movable plate 12 and the inner wall of the axial cavity 4, respectively; The second movable plate 12 is provided with a third connecting part 14 and a fourth connecting part 15; The third connecting part 14 is movably riveted to the telescopic column 2; The fourth connecting part 15 is movably riveted to the support plate 3.

[0050] As a further embodiment of this embodiment, the first connecting part 10 and the second connecting part 11 are symmetrically arranged on the first movable plate 8; In the initial state, the angle between the axial direction of the first elastic member 9 and the line connecting the first connecting part 10 and the second connecting part 11 is not less than 60 degrees and not greater than 85 degrees.

[0051] As a further embodiment of this embodiment, the third connecting part 14 and the fourth connecting part 15 are symmetrically arranged on the second movable plate 12; In the initial state, the angle between the axial direction of the second elastic member 13 and the line connecting the third connecting part 14 and the fourth connecting part 15 is not less than 60 degrees and not greater than 85 degrees.

[0052] like Figure 5 As shown, in a further embodiment of this example, in the initial state, the height of the movable riveting joint between the first connecting part 10 and the inner wall of the axial cavity 4 is lower than the height of the movable riveting joint between the second connecting part 11 and the support plate 3.

[0053] As a further embodiment of this example, the height of the movable riveting joint between the third connecting part 14 and the telescopic column 2 is lower than the height of the movable riveting joint between the fourth connecting part 15 and the support plate 3.

[0054] like Figure 1-7As shown, in operation, the femoral head compression device disclosed in this application allows the operator to directly or indirectly control the telescopic column 2 to move axially within the axial cavity 4. When the telescopic column 2 moves towards the motion transmission assembly, it applies horizontal pressure to the motion transmission assembly. Specifically, the pressure from the telescopic column 2 is transmitted to the third connecting part 14, and then through the second movable plate 12, the fourth connecting part 15, the support plate 3, the second connecting part 11, the first movable plate 8, and the first connecting part 10 to the inner wall of the axial cavity 4 of the outer sleeve 1. Because the inner wall of the axial cavity 4 provides support, the motion transmission assembly is compressed. At this time, due to the elastic characteristics of the first elastic element 9 and the second elastic element 13, the first movable plate 8 and most of the second movable plates 12 are flipped or turned, with the axis of flipping being the movable riveting point of the first connecting part 10 and the movable riveting point of the third connecting part 14. Simultaneously, the second connecting part 11 and the fourth connecting part 15 lift the support plate 3. When the support plate 3 needs to be retracted, simply control the telescopic column 2 to move back within the axial cavity 4, and the first elastic element 9 and the second elastic element 13 will drive the first movable plate 8 and the second movable plate 12 to return to their original positions. It is worth noting that, in the initial state, the angle between the axial direction of the first elastic element 9 and the line connecting the first connecting part 10 and the second connecting part 11 is not less than 60 degrees and not greater than 85 degrees; the angle between the axial direction of the second elastic element 13 and the line connecting the third connecting part 14 and the fourth connecting part 15 is not less than 60 degrees and not greater than 85 degrees. The heights of the second connecting part 11 and the fourth connecting part 15 are higher than the heights of the first connecting part 10 and the third connecting part 14. This arrangement ensures that when the telescopic column 2 abuts against the motion transmission assembly, the motion transmission assembly will cause the second connecting part 11 and the fourth connecting part 15 to rotate upwards; otherwise, the rotation direction would be the opposite (i.e., downwards), which does not meet the usage requirements of the device in this application.

[0055] like Figure 5 , 6 As shown in Figures 8 and 9, as a further embodiment of this example, a combined core column 16 is also included to allow the telescopic column 2 to be controlled by the operator so as to move along the axial direction of the axial cavity 4. One end of the combined core column 16 is disposed inside the axial cavity 4 and connected to the end of the telescopic column 2, while the other end is exposed outside the outer sleeve 1. It is controlled by the operator to move along the axial direction of the axial cavity 4.

[0056] As a further embodiment of this embodiment, the combined core column 16 is provided with an external thread 17 on the side wall away from the support plate 3; The outer sleeve 1 is provided with a meshing part 18, and the meshing part 18 is provided with an internal thread 19 that meshes with the external thread 17 on the combined core column 16. After the external thread 17 engages with the internal thread 19, the combined core 16 is rotated to move along the axial direction of the axial cavity 4, thereby driving the telescopic column 2 to move.

[0057] As a further embodiment of this example, the combined core column 16 and the telescopic column 2 are connected by bearings.

[0058] As a further embodiment of this example, a concave-convex connecting pair is provided between the combined core column 16 and the telescopic column 2 to realize the guiding transmission between the combined core column 16 and the telescopic column 2.

[0059] As a further embodiment of this example, the concave-convex connection pair includes a conical protrusion 20 disposed on the combined core column 16 or the telescopic column 2, a conical groove 21 disposed on the telescopic column 2 or the combined core column 16, and a conical bearing 22 between the conical protrusion 20 and the conical groove 21.

[0060] As a further embodiment of this invention, the end of the combined core column 16 away from the telescopic column 2 is provided with an interface (e.g., a hexagonal interface, a cross interface, a straight interface, etc.) or a rotating handle (not shown in the figure) for connection to electric / manual tools or manual operation.

[0061] like Figure 5 , 6 As shown in Figures 8 and 9, the femoral head compression device disclosed in this application, during operation, causes the combined core column 16 to rotate and advance or deflect via an electric / manual tool or manual operation. When the combined core column 16 rotates and advances, its movement can be decomposed into two directions: axial linear motion and circumferential rotational motion. Through the concave-convex connecting pair, the circumferential rotational motion is blocked by the tapered bearing 22, while the axial linear motion is transmitted to the telescopic column 2.

[0062] As a further embodiment of this example, the support plate 3 includes a strip plate 23 and a connecting ear plate 24; The connecting ear plate 24 is disposed on both sides or the lower end surface of the strip plate 23 for connection with the motion transmission component.

[0063] like Figure 9-13 As shown, as a further embodiment of this example, the cross-sectional shape of the strip plate 23 is cylindrical, elliptical, or spherical.

[0064] As a further embodiment of this invention, when the support plate 3 is lowered to its lowest height, its top exceeds the outer diameter of the outer sleeve 1, thereby reducing the obstruction when the femoral head compression device is inserted into the core tunnel.

[0065] By adopting the above technical solution, this application has the following beneficial effects: (1) By combining the core column 16 with the outer sleeve 1 through the threaded engagement, the operator can precisely control the axial movement of the telescopic column 2, thereby achieving precise ejection or retraction of the support plate 3, improving the flexibility of operation and ensuring the accuracy of the surgical procedure.

[0066] (2) The design of the support plate 3, including its cross-sectional shape and the setting of the connecting ear plate 24, enables the device to adapt to different femoral shapes, improving the device's versatility and compatibility. In addition, by adjusting the parameters of the motion transmission components, it can be further adapted to the needs of different surgical scenarios.

[0067] (3) The design of the combined core column 16, especially the external thread 17 on the side away from the support plate 3 and the meshing part 18 on the outer sleeve 1, allows the operator to easily control the movement of the telescopic column 2 by rotating the combined core column 16.

[0068] (4) When the support plate 3 is lowered to its lowest height, its top still exceeds the outer diameter of the outer sleeve 1. This design reduces the obstruction of the device being inserted into the core tunnel, reduces the risk of damage to the patient's tissues, and improves the safety of the operation.

[0069] Example 2 like Figure 14-15 As shown, this embodiment is basically the same as embodiment 1, except that the motion transmission component can be a hydraulic bladder 25 or a gear and rack transmission structure.

[0070] As a further embodiment of this invention, the motion transmission component is a hydraulic bladder 25; The hydraulic bladder 25 is disposed within the axial cavity 4; The end of the telescopic column 2 abuts against the hydraulic bladder 25; The bottom of the support plate 3 abuts against the hydraulic bladder 25; When the telescopic column 2 compresses the hydraulic bladder 25, the hydraulic bladder 25 transmits pressure to the support plate 3, thereby converting the axial pressure from the telescopic column 2 into radial pressure on the support plate 3.

[0071] As a further embodiment of this invention, the motion transmission component is a gear and rack transmission structure; The gear and rack transmission structure includes an axial telescopic rack 26, a radial telescopic rack 27, and a transmission gear 28. The axial telescopic rack 26 is telescopically mounted on the end of the telescopic column 2 and on the inner wall of the axial cavity 4; The radial telescopic rack 27 is telescopically mounted on the lower end of the support plate 3 and on the inner wall of the axial cavity 4; The transmission gear 28 meshes with both the axial telescopic rack 26 and the radial telescopic rack 27. When the telescopic column 2 moves axially, it drives the axial telescopic rack 26 to move, which in turn drives the transmission gear 28 to rotate, thereby driving the radial telescopic rack 27 to move, and finally driving the support plate 3 to move.

[0072] By adopting the above technical solution, this application has the following beneficial effects: (1) By introducing a hydraulic bladder 25 or a gear and rack transmission structure as a motion transmission component, this technical solution provides a variety of transmission methods for the femoral head compression device. This diversity enables the device to adapt to different surgical needs and environmental conditions, improving its applicability and flexibility.

[0073] (2) The hydraulic bladder 25 can transmit pressure quickly and evenly, ensuring that the support plate 3 is subjected to stable radial thrust. The gear and rack transmission structure ensures stable transmission between the telescopic column 2 and the support plate 3 through precise meshing.

[0074] (3) Both the hydraulic bladder 25 and the gear and rack transmission structure have high structural compactness, making the whole device smaller and lighter. At the same time, these transmission methods have high reliability and durability, ensuring safety and stability during the operation.

[0075] Example 3 like Figure 16-18 As shown, this embodiment is basically the same as embodiment 1, except that the first motion transmission device includes a first movable plate 8, a first connecting part 10, and a second connecting part 11; The first connecting part 10 is connected to the inner wall of the axial cavity 4 by a torque riveting node 29. The second connecting part 11 and the support plate 3 are connected by a torque riveting node 29.

[0076] As a further embodiment of this embodiment, the second motion transmission device includes a second movable plate 12, a third connecting part 14 and a fourth connecting part 15; The third connecting part 14 and the telescopic column 2 are connected by a movable torque riveting node 29; The fourth connecting part 15 and the support plate 3 are connected by a torque riveting node 29.

[0077] As a further embodiment of this example, the torque riveting node 29 includes a rivet assembly 30, a first torsion arm 31, a second torsion arm 32, and a third elastic element 33. The third elastic element 33 is disposed between the first torsion arm 31 and the second torsion arm 32; The first torsion arm 31 and the second torsion arm 32 are respectively disposed between the two components that are riveted by the movable torque, and the components are connected by the rivet assembly 30.

[0078] By adopting the above technical solution, this application has the following beneficial effects: (1) By using torque riveting node 29 for active torque riveting, the first motion transmission device and the second motion transmission device can respond to the movement of telescopic column 2 more flexibly. At the same time, due to the specified rotation trend, the rotation direction is fixed and there will be no uncertain trajectory, thus making the movement of support plate 3 more stable and reducing the surgical risk caused by transmission instability.

[0079] (2) The design of the torque riveting node 29 not only improves the strength of the connection part, but also enhances the durability of the entire motion transmission component. In long-term surgical operations, this structure can resist fatigue and wear caused by frequent movement, thus extending the service life of the device.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A femoral head compression device, characterized in that, Includes outer sleeve, telescopic column, and support plate; The outer sleeve is a cylindrical structure with an internal axial cavity, and the two ends in the axial direction are an open end and a closed end, respectively. A working opening is provided on the side wall of the outer sleeve; The telescopic column is disposed within the axial cavity and is directly or indirectly controlled by the operator to move along the axial direction of the axial cavity; The support plate is positioned at the working opening and is pushed out or retracted at the working opening under the control of the telescopic column.

2. The femoral head compression device according to claim 1, characterized in that, It also includes a motion transmission assembly for controlling the support plate by the telescopic column; When the motion transmission component is compressed by the telescopic column, it transmits the axial movement of the telescopic column into the radial movement of the support plate at the working opening.

3. The femoral head compression device according to claim 2, characterized in that, The motion conduction assembly includes a first motion conduction device and a second motion conduction device that are disposed opposite to each other. The first motion transmission device is connected to the axial inner wall of the outer sleeve cavity; The second motion transmission device is connected to one end of the telescopic column near the closed end; The support plate is disposed at the working opening and is connected to the first motion transmission device and the second motion transmission device; When the operator controls the telescopic column to move towards the side closer to the closed end, the motion transmission component is deflected by the pressure from the telescopic column, thereby pushing the support plate to move away from the outer sleeve and abut against the femur.

4. The femoral head compression device according to claim 3, characterized in that, The first motion transmission device includes a first movable plate and a first elastic element; The first elastic element is fixedly connected at both ends to the first movable plate and the inner wall of the axial cavity, respectively. The first movable plate is provided with a first connecting part and a second connecting part; The first connecting part is riveted to the inner wall of the axial cavity; The second connecting part is movably riveted to the support plate.

5. The femoral head compression device according to claim 4, characterized in that, The first connecting part and the second connecting part are symmetrically arranged on the first movable plate; In the initial state, the angle between the axial direction of the first elastic element and the line connecting the first connecting part and the second connecting part is not less than 60 degrees and not greater than 85 degrees.

6. The femoral head compression device according to claim 5, characterized in that, In the initial state, the height of the movable riveting joint between the first connecting part and the inner wall of the axial cavity is lower than the height of the movable riveting joint between the second connecting part and the support plate.

7. The femoral head compression device according to claim 3, characterized in that, The second motion transmission device includes a second movable plate and a second elastic element; The two ends of the second elastic element are fixedly connected to the second movable plate and the inner wall of the axial cavity, respectively; The second movable plate is provided with a third connecting part and a fourth connecting part; The third connecting part is movably riveted to the telescopic column; The fourth connecting part is movably riveted to the support plate.

8. The femoral head compression device according to claim 7, characterized in that, The third connecting part and the fourth connecting part are symmetrically arranged on the second movable plate; In the initial state, the angle between the axial direction of the second elastic element and the line connecting the third and fourth connecting parts is not less than 60 degrees and not greater than 85 degrees.

9. The femoral head compression device according to claim 8, characterized in that, The height of the third connecting part and the movable riveting joint of the telescopic column is lower than the height of the fourth connecting part and the movable riveting joint of the support plate.

10. The femoral head compression device according to claim 1, characterized in that, It also includes a combined core column for controlling the telescopic column to move axially along the axial cavity under the operator's control; One end of the combined core column is disposed in the axial cavity and connected to the end of the telescopic column, while the other end is exposed outside the outer sleeve and is controlled by the operator to move along the axial direction of the axial cavity.

11. The femoral head compression device according to claim 10, characterized in that, The composite core column has an external thread on the side wall away from the support plate; The outer sleeve is provided with a meshing part, and the meshing part is provided with an internal thread that meshes with the external thread on the combined core column; After the external thread engages with the internal thread, rotating the combined core column causes it to move along the axial direction of the axial cavity, thereby driving the telescopic column to move.

12. The femoral head compression device according to claim 10, characterized in that, The combined core column and the telescopic column are connected by bearings.

13. The femoral head compression device according to claim 10, characterized in that, A concave-convex connecting pair is provided between the combined core column and the telescopic column to realize the guiding transmission between the combined core column and the telescopic column.

14. The femoral head compression device according to claim 13, characterized in that, The concave-convex connection includes a tapered protrusion disposed on the combined core column or the telescopic column, a tapered groove disposed on the telescopic column or the combined core column, and a tapered bearing between the tapered protrusion and the tapered groove.

15. The femoral head compression device according to claim 10, characterized in that, The end of the combined core column away from the telescopic column is provided with an interface or rotating handle for connection to electric / manual tools or manual operation.

16. The femoral head compression device according to claim 2, characterized in that, The support plate includes a strip plate and a connecting lug plate; The connecting ear plates are disposed on both sides or the lower end surface of the strip plate and are used to connect with the motion transmission component.

17. The femoral head compression device according to claim 16, characterized in that, The cross-sectional shape of the strip plate is cylindrical, elliptical, or spherical.

18. The femoral head compression device according to claim 1, characterized in that, When the support plate is lowered to its lowest height, its top exceeds the outer diameter of the outer sleeve, thereby reducing obstruction when the femoral head compression device is inserted into the core tunnel.

19. The femoral head compression device according to claim 2, characterized in that, The motion transmission component is a hydraulic bladder; The hydraulic bladder is disposed within the axial cavity; The end of the telescopic column abuts against the hydraulic bladder; The bottom of the support plate abuts against the hydraulic bladder; When the telescopic column compresses the hydraulic bladder, the hydraulic bladder transmits pressure to the support plate, thereby converting the axial pressure from the telescopic column into radial pressure on the support plate.

20. The femoral head compression device according to claim 2, characterized in that, The motion transmission component is a gear and rack transmission structure; The gear and rack transmission structure includes an axial telescopic rack, a radial telescopic rack, and a transmission gear; The axial telescopic rack is telescopically mounted on the end of the telescopic column and on the inner wall of the axial cavity; The radial telescopic rack is telescopically mounted on the lower end of the support plate and on the inner wall of the axial cavity; The transmission gear meshes with both the axial telescopic rack and the radial telescopic rack. When the telescopic column moves axially, it drives the axial telescopic rack to move, which in turn drives the transmission gear to rotate, thereby driving the radial telescopic rack to move, and finally driving the support plate to move.

21. The femoral head compression device according to claim 3, characterized in that, The first motion transmission device includes a first movable plate, a first connecting part, and a second connecting part; The first connecting part is connected to the inner wall of the axial cavity by a torque riveting node; The second connecting part and the support plate are connected by a torque riveting node.

22. The femoral head compression device according to claim 3, characterized in that, The second motion transmission device includes a second movable plate, a third connecting part, and a fourth connecting part; The third connecting part and the telescopic column are connected by a torque riveting node. The fourth connecting part and the support plate are connected by a torque riveting node.

23. The femoral head compression device according to any one of claims 21 or 22, characterized in that, The torque riveting node includes a rivet assembly, a first torsion arm, a second torsion arm, and a third elastic element; The third elastic element is disposed between the first torsion arm and the second torsion arm; The first torsion arm and the second torsion arm are respectively disposed between the two components that are riveted by moving torque, and the components are connected by the rivet assembly.

24. An apparatus comprising the femoral head compression device according to any one of claims 1-22.

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