A leg support device

Abstract

The application belongs to the technical field of medical devices, and discloses a leg supporting device, which comprises a base assembly, a tibial supporting assembly, a femoral supporting assembly and a joint assembly. The lower end of the tibial supporting assembly is rotatably mounted on the base assembly in the second horizontal direction, and the length of the tibial supporting assembly is adjustable. The lower end of the femoral supporting assembly is rotatably mounted on the base assembly in the second horizontal direction, and the length of the femoral supporting assembly is adjustable. The distance between the lower end of the femoral supporting assembly and the lower end of the tibial supporting assembly in the first horizontal direction is adjustable. The joint assembly comprises a connecting main shaft extending in the second horizontal direction, and the upper ends of the tibial supporting assembly and the femoral supporting assembly are rotatably connected through the connecting main shaft. The connecting main shaft is provided with a band fixing member for installing a band. The leg supporting device disclosed by the application can improve the supporting stability and reliability of the patient's leg, thereby improving the operation efficiency and operation accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a leg support device. BACKGROUND

[0002] The knee joint is an important weight-bearing joint of the lower limbs, and the knee joint includes the distal femur, the patella, the proximal tibia and the proximal fibula. Degenerative osteoarthrosis of the knee joint is a common disease in the elderly, and severe knee joint osteoarthrosis needs to be treated by artificial knee joint replacement. Knee joint replacement can relieve the pain of the knee joint, improve the function of the knee joint and correct the deformity of the knee joint to obtain long-term stability.

[0003] During the knee joint replacement surgery, the distal femur and the proximal tibia of the knee joint to be operated need to be in a stable position to facilitate subsequent surgical operations. The existing leg support device for supporting the patient's leg generally includes a slide rail assembly, a sliding block slidably mounted on the slide rail assembly, and a tibial support member rotatably mounted on the sliding block. The lower end of the tibial support member is connected with a foot support member, the tibial support member is used to support the patient's tibia, and the foot support member is used to support the patient's foot.

[0004] The existing leg support device, because the lower end of the tibial support member is connected with the sliding block and the upper end is suspended, the tibial support member is prone to shaking at the upper end due to too much force during use, which affects the stability of the patient's leg support and further affects the position accuracy of the patient's leg, thereby affecting the progress and reliability of the surgery. At the same time, the setting of the tibial support frame also easily causes the tibial support member to be deformed or even broken under stress, affecting the service life of the leg support device. SUMMARY

[0005] The purpose of the present application is to provide a leg support device to improve the stability and reliability of the support of the patient's leg, improve the accuracy and efficiency of the surgery, and improve the service life of the leg support device.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] A leg support device, comprising:

[0008] a base assembly extending along a first horizontal direction and used to be slidably laid on a surgical bed;

[0009] a tibial support assembly rotatably mounted on the base assembly about a second horizontal direction at the lower end, and the length of the tibial support assembly is adjustable;

[0010] A femur support assembly is rotatably mounted on the base assembly at a lower end thereof in the second horizontal direction, the length of the femur support assembly is adjustable, and the distance between the lower end of the femur support assembly and the lower end of the tibia support assembly in the first horizontal direction is adjustable;

[0011] A joint assembly includes a connecting shaft extending in the second horizontal direction, the upper ends of the tibia support assembly and the femur support assembly are rotatably connected by the connecting shaft, and a strap fixing member is arranged on the connecting shaft and used for mounting a strap.

[0012] As an optional technical solution of the leg support device, the upper end of the tibia support assembly is rotatably sleeved on the connecting shaft, the upper end of the femur support assembly is rotatably sleeved on the connecting shaft, and the upper end of the femur support assembly and the upper end of the tibia support assembly are arranged in an axial direction of the connecting shaft.

[0013] And / or, the strap fixing member includes a connecting ring part and a strap fixing part, the connecting ring part is sleeved on the connecting shaft, and the strap fixing part extends in a radial direction of the connecting ring part, and the strap fixing part is provided with a plurality of strap fixing grooves in a length direction and side by side.

[0014] As an optional technical solution of the leg support device, two strap fixing members are arranged in the axial direction of the connecting shaft, the two strap fixing members are respectively located on two sides of the upper end of the tibia support assembly, and one strap fixing member is located between the upper end of the femur support assembly and the upper end of the tibia support assembly.

[0015] And / or, a joint support sleeve is sleeved on the connecting shaft, an outer wall of the joint support sleeve is provided with a relief gap, the upper end of the tibia support assembly passes through the relief gap and is connected with the connecting shaft, and the joint support sleeve is used for supporting a knee joint of a patient.

[0016] As an optional technical solution of the leg support device, an outer diameter of the joint support sleeve gradually increases from a middle part to two ends, and an outer surface of the joint support sleeve is a smooth curved surface with a high two ends and a concave middle part.

[0017] And / or, the joint support sleeve is made of rubber or silicone.

[0018] And / or, annular grooves are arranged on end faces of the two ends of the joint support sleeve.

[0019] As an optional technical solution of the leg support device, the plurality of strap fixing grooves are respectively a first fixing groove with an upward slot and a second fixing groove with a downward slot, and the first fixing groove and the second fixing groove are arranged in a staggered manner in an extension direction of the strap fixing part.

[0020] And / or, two said strap fixing parts are arranged on the connecting ring part, and the two strap fixing parts are respectively arranged on opposite sides of the connecting ring part and extend downward in a direction away from the connecting ring part.

[0021] And / or, the connecting ring part is an open circular ring, and connecting plate parts are outwardly extended at two ends of the connecting ring part, the two connecting plate parts are oppositely arranged, the two connecting plate parts are fastened by a connecting threaded part, and when the connecting threaded part loosens the two connecting plate parts, the connecting ring part can slide along the connecting main shaft.

[0022] As an optional technical scheme of a leg support device, the base assembly comprises:

[0023] A slide rail assembly extends in the first horizontal direction;

[0024] A slide block assembly is slidably arranged on the slide rail assembly in the first horizontal direction, and a lower end of the tibia support assembly is rotatably installed on the slide block assembly;

[0025] Two bed beam connecting assemblies are spaced apart in the first horizontal direction, and the bed beam connecting assemblies are used to connect with a bed side beam of the operating bed. One of the two bed beam connecting assemblies is connected with one side of the slide rail assembly, and the other is separated from the slide rail assembly and has an upper end rotatably connected with the femur support assembly.

[0026] As an optional technical scheme of a leg support device, an upper end of the bed beam connecting assembly separated from the slide rail assembly is connected with a rotary connecting assembly, the rotary connecting assembly comprises a rotary seat and a ball head pressing assembly, a ball head installation slot is formed in the rotary seat, a lower end of the femur support assembly has a femur rotary ball head, the femur rotary ball head is rotatably installed in the ball head installation slot, and the ball head pressing assembly is arranged in the rotary seat in the second horizontal direction and has a tail end selectively extending into the ball head installation slot to press against the femur rotary ball head.

[0027] As an optional technical scheme of a leg support device, the bed beam connecting assembly comprises:

[0028] A beam clamping seat comprises an upper clamping seat and a lower clamping seat oppositely arranged, and a beam sliding groove is formed by the upper clamping seat and the lower clamping seat, the beam sliding groove is used to slidably cooperate with the bed side beam, and an adjusting transverse hole is formed in the lower clamping seat in the first horizontal direction;

[0029] A seat sliding rod is vertically arranged and has an upper end installed on the upper clamping seat, and the seat sliding rod is slidably arranged in the lower clamping seat;

[0030] The pressing rod is slidably arranged in the adjusting hole and has one end exposed outside the opening of the adjusting hole to form a pressing end, the pressing rod is provided with an adjusting hole penetrating through the pressing rod along a vertical direction, the width of the adjusting hole in the first horizontal direction is greater than the width of the seat slide rod, and the side hole wall of the adjusting hole away from the pressing end is provided with a locking member, the pressing rod has a locking position where the locking member abuts against the seat slide rod and a pressing position where the locking member is separated from the seat slide rod;

[0031] The pressing elastic member is arranged in the adjusting hole and is used to apply an elastic force to the pressing rod to make the locking member abut against the seat slide rod.

[0032] As an optional technical solution of the leg support device, the seat slide rod is provided with a locking groove on one side of the locking member, the locking groove extends along the second horizontal direction, and the locking groove is provided with a plurality of locking grooves arranged side by side along the vertical direction, and the locking member can be clamped into any one of the locking grooves.

[0033] And / or, one of the pressing rod and the lower clamping seat is provided with an adjusting limiting hole, the other is connected with an adjusting limiting member, the adjusting limiting hole extends along the first horizontal direction, the adjusting limiting member is slidably arranged in the adjusting limiting hole, and when the adjusting limiting member and the adjusting limiting hole abut against the side hole wall of the adjusting limiting hole away from the pressing end, the seat slide rod is arranged in a spaced manner with the hole wall of the adjusting hole.

[0034] As an optional technical solution of the leg support device, the sliding block assembly comprises:

[0035] The sliding seat is provided with a sliding groove penetrating through the lower end of the sliding seat along the first horizontal direction, the groove bottom of the sliding groove is provided with a gasket positioning groove, and the opposite two side groove walls of the sliding groove are provided with limiting insertion grooves.

[0036] The sliding gasket is made of lubricating material, the sliding gasket comprises a main gasket part and two limiting ear parts arranged on the opposite two sides of the main gasket part, the main gasket part is accommodated in the gasket positioning groove and protrudes downward from the groove bottom of the sliding groove, and the two limiting ear parts are respectively inserted into the two limiting insertion grooves.

[0037] Advantages:

[0038] The leg supporting device provided by the application can effectively reduce the probability of deformation or even bending of the tibial supporting assembly, improve the setting stability and comfort of the patient's leg on the femoral supporting device, enhance the stress stability of the leg supporting device, reduce the probability of shaking of the leg supporting device during the operation process, and improve the operation reliability; the length of the femoral supporting assembly and the tibial supporting assembly is adjustable, and the upper ends of the femoral supporting assembly and the tibial supporting assembly are rotationally connected, and the distance between the lower ends is adjustable, so that the length of the femoral supporting assembly and the tibial supporting assembly and the angle between them can be adjusted before the operation, so that the leg supporting device is suitable for use of patients with different heights, improves the applicability and use flexibility, and can also adjust the bending angle of the knee of the patient, so that the bending angle of the knee can better adapt to the requirements of the operation, and improve the convenience of the operation; in addition, the band fixing element arranged on the connecting main shaft can better fix the joint of the patient, and the band fixed by the band fixing element can also pull the tissue around the surgical incision of the patient, so that the surgical incision is always exposed during the operation process, and the operation convenience and operation precision are improved. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a structural schematic view of the leg supporting device and the operation bed provided by the embodiment of the application;

[0040] Figure 2 is a structural schematic view of the leg supporting device provided by the embodiment of the application;

[0041] Figure 3 is a front structural schematic view of the slide rail assembly provided by the embodiment of the application;

[0042] Figure 4 is a back structural schematic view of the slide rail assembly provided by the embodiment of the application;

[0043] Figure 5 is a sectional view of the partial structure of the slide rail assembly provided by the embodiment of the application;

[0044] Figure 6 is a structural schematic view of the bed beam connecting assembly provided by the embodiment of the application;

[0045] Figure 7 is a sectional view of the bed beam connecting assembly provided by the embodiment of the application;

[0046] Figure 8 is a partial enlarged view of I in Figure 7

[0047] Figure 9 is a structural schematic view of the locking rod provided by the embodiment of the application;​

[0048] Figure 10 is a structural schematic view of a seat slide rail provided by an embodiment of the present application;

[0049] Figure 11 is another cross-sectional view of a bed beam connecting assembly provided by an embodiment of the present application;

[0050] Figure 12 is a partially exploded schematic view of a slider assembly provided by an embodiment of the present application;

[0051] Figure 13 is a cross-sectional view of a slider assembly provided by an embodiment of the present application;

[0052] Figure 14 is a back structural schematic view of a slider assembly provided by an embodiment of the present application;

[0053] Figure 15 is a partially exploded structural schematic view of a slider assembly provided by an embodiment of the present application;

[0054] Figure 16 is a cross-sectional view of a slider assembly provided by an embodiment of the present application;

[0055] Figure 17 is Figure 16 is a local enlarged view at J in FIG. 8;

[0056] Figure 18 is a partial structural schematic view of a leg support device provided by an embodiment of the present application;

[0057] Figure 19 is an exploded structural schematic view of a shin support assembly and a joint assembly provided by an embodiment of the present application;

[0058] Figure 20 is a cross-sectional view of a joint assembly provided by an embodiment of the present application;

[0059] Figure 21 is a cross-sectional view of a rotary connecting assembly provided by an embodiment of the present application;

[0060] Figure 22 is an exploded structural schematic view of a rotary connecting assembly provided by an embodiment of the present application.

[0061] in the figure:

[0062] 1, base assembly; 11, slide rail assembly; 111, sliding sub-plate; 111a, first sliding sub-plate; 111b, second sliding sub-plate; 1111, base plate part; 1112, slide rail part; 1113, insertion slot; 1114, limiting column; 1115, mounting boss; 112, connecting block; 1121, limiting groove; 113, plate locking assembly; 1131, connecting piece; 11311, annular groove; 1132, plate locking piece; 11321, annular groove; 1133, anti-disengagement piece; 1134, locking elastic piece;

[0063] 12, bed beam connecting assembly; 121, beam clamping seat; 1211, upper clamping seat; 1212, middle seat; 12121, accommodating groove; 1213, lower clamping seat; 12131, adjusting transverse hole; 1214, beam sliding groove; 1215, side limiting protrusion; 122, guide rod; 1221, main rod body; 1222, upper limiting part; 123, seat adjusting assembly; 1231, seat sliding rod; 12311, locking groove; 12312, mounting plane; 12313, lower limiting part; 1232, pressing rod; 12321, adjusting through hole; 12322, adjusting limiting hole; 1233, adjusting limiting piece; 1234, locking rod; 12341, locking part; 1235, pressing elastic piece; 124, beam fastening assembly; 1241, beam locking rod; 1242, beam locking knob; 1243, locking elastic piece; 125, first fastening screw; 126, second fastening screw;

[0064] 13, sliding block assembly; 131, sliding seat; 1311, fixed sliding seat; 1312, movable sliding seat; 1313, sliding groove; 1314, limiting insertion slot; 1315, gasket positioning groove; 13151, first groove part; 13152, second groove part; 1317, limiting protrusion; 1318, mounting sliding seat; 1319, limiting groove; 132, sliding gasket; 1321, first piece part; 1322, second piece part; 1323, limiting ear part; 1324, arc-shaped groove; 1325, limiting edge part; 133, clamping adjusting assembly; 1331, clamping adjusting rod; 13311, screw part; 13312, optical shaft part; 13313, pressing part; 13314, spline shaft part; 1332, adjusting handle; 13321, connecting sleeve part; 13322, handle part; 1333, sliding limiting piece; 1334, locking seat; 1335, adjusting elastic piece; 134, sliding locking knob; 135, pivot shaft;

[0065] 14, slider limiting member; 15, rotating connecting assembly; 151, rotating seat; 1511, base portion; 1512, rotating sleeve portion; 1513, ball head mounting groove; 1514, V-shaped groove; 152, pressing lever; 1521, pressing head portion; 1522, adjusting screw portion; 1523, connecting rod portion; 154, sleeve seat; 155, pressing adjusting knob; 156, pressing elastic member;

[0066] 2, femur support assembly; 21, lower femur support member; 211, fixed long hole; 22, upper femur support member; 221, sliding groove; 23, femur fastening assembly; 231, locking screw member; 232, femur locking knob; 24, femur rotating ball head;

[0067] 3, tibia support assembly; 31, connecting seat; 311, ball head seat; 312, support seat; 3121, bottom plate portion; 3122, first side plate portion; 3123, second side plate portion; 32, foot supporting member; 321, foot supporting plate portion; 322, foot positioning plate portion; 323, foot blocking plate portion; 33, tibia support frame; 331, upper tibia support member; 332, lower tibia support member; 3321, guide rail portion; 333, tibia support plate; 334, tibia shaft sleeve portion; 34, tibia rotating ball head; 35, tibia locking member;

[0068] 4, joint assembly; 41, connecting main shaft; 42, joint support sleeve; 43, band fixing member; 431, connecting ring portion; 432, band fixing portion; 4321, band fixing groove; 433, connecting plate portion; 44, shaft limiting member;

[0069] 200, operating bed; 201, bed side beam. DETAILED DESCRIPTION

[0070] The application will be further described in conjunction with the accompanying drawings and examples. It should be understood that the specific examples described herein are intended to be illustrative only and are not in any way limiting of the application. Furthermore, it should be understood that the drawings are not necessarily to scale and that, unless otherwise indicated, like reference numerals are used throughout the several views to denote like components.

[0071] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0072] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0073] In the description of the present embodiment, the terms "upper", "lower", "right", "left", and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0074] The present embodiment provides a leg support device which can be applied in knee joint surgery, for surgery on the legs of a patient to ensure the stability of the patient's legs during the surgery and improve the reliability of the surgery. The knee joint surgery can be a surgery performed by an orthopedic surgery robot, or a knee joint surgery performed by a doctor.

[0075] As shown in Figure 1 and Figure 2 The leg support device includes a base assembly 1, a femur support assembly 2, and a tibia support assembly 3. The base assembly 1 is used to interface with a surgical bed 200 to mount the leg support device on the surgical bed 200; the femur support assembly 2 is used to stabilize the tibia support assembly 3, and the tibia support assembly 3 is used to support the tibia and feet of a patient.

[0076] Specifically, the base assembly 1 extends along a first horizontal direction and is used to slide and lay on the surgical bed 200; the lower end of the tibia support assembly 3 is rotatably mounted on the base assembly 1 about a second horizontal direction, and the length of the tibia support assembly 3 is adjustable; the lower end of the femur support assembly 2 is rotatably mounted on the base assembly 1 about the second horizontal direction, and the length of the femur support assembly 2 is adjustable, and the distance between the lower end of the femur support assembly 2 and the lower end of the tibia support assembly 3 in the first horizontal direction is adjustable. The leg support device further includes a joint assembly 4, which includes a connecting main shaft 41 extending along the second horizontal direction, and the upper ends of the tibia support assembly 3 and the femur support assembly 2 are rotatably connected through the connecting main shaft 41. The connecting main shaft 41 is provided with a band fixing member 43 for mounting a band.

[0077] The leg support device provided by the embodiment can effectively reduce the probability of deformation or even bending of the tibial support assembly 3, improve the setting stability and comfort of the patient's leg on the femoral support device, enhance the stress stability of the leg support device, reduce the probability of shaking of the leg support device during the operation process, and improve the operation reliability. The length of the femoral support assembly 2 and the tibial support assembly 3 is adjustable, and the upper ends of the femoral support assembly 2 and the tibial support assembly 3 are rotatably connected, and the distance between the lower ends is adjustable. Before the operation, the length and the angle between the femoral support assembly 2 and the tibial support assembly 3 can be adjusted, so that the leg support device is suitable for patients of different heights, improves the applicability and use flexibility, and can also adjust the bending angle of the knee of the patient, so that the bending angle of the knee can better adapt to the needs of the operation, and improve the convenience of the operation. Furthermore, the band fixing member 43 is arranged on the connecting shaft 41, which can better fix the joint of the patient, and the band fixed by the band fixing member 43 can also pull the tissue around the surgical incision of the patient, so that the surgical incision is always exposed during the operation process, and the operation convenience and operation precision are improved.

[0078] In the embodiment, the base assembly 1 includes a slide rail assembly 11, a slide block assembly 13, and a bed beam connecting assembly 12. The slide rail assembly 11 extends along a first horizontal direction and is slidably arranged on the operating bed 200. The slide block assembly 13 is slidably arranged on the slide rail assembly 11 along the first horizontal direction. The bed beam connecting assembly 12 is arranged in two along the first horizontal direction. The bed beam connecting assembly 12 is used to slidably connect with the bed side beam 201 of the operating bed 200. The lower end of the femoral support assembly 2 is rotatably arranged on one bed beam connecting assembly 12, and the bed beam connecting assembly 12 is separated from the slide rail assembly 11. The slide rail assembly 11 is connected with the other bed beam connecting assembly 12. The lower end of the tibial support assembly 3 is rotatably arranged on the slide block assembly 13.

[0079] The above arrangement can ensure that the lower ends of the femoral support assembly 2 and the tibial support assembly 3 are rotatably installed on the base assembly 1, shorten the length of the slide rail assembly 11 in the first horizontal direction, improve the processing, assembly and carrying convenience of the slide rail assembly 11, reduce the weight of the slide rail assembly 11, and improve the cleaning convenience of the slide rail assembly 11. At the same time, since the lower end of the tibial support assembly 3 is rotatably installed on the slide block assembly 13, and the slide block assembly 13 is slidably installed on the slide rail assembly 11, the angle between the femoral support assembly 2 and the tibial support assembly 3 can be adjusted by sliding the slide block assembly 13 on the slide rail assembly 11 before or during the operation, so as to adjust the bending degree of the knee joint of the patient and improve the operation convenience and reliability. By arranging two bed beam connecting assemblies 12, the leg support device can be more stably fixed on the operating bed 200, and the position of the leg support device on the operating bed 200 can be adjusted by sliding the bed beam connecting assembly 12 on the bed side beam 201, thereby improving the applicability to different operating beds 200 and patients of different heights.

[0080] In other embodiments, the lower end of the femoral support assembly 2 can be directly rotatably installed on one end of the slide rail assembly 11. In other embodiments, two slide block assemblies 13 can be arranged on the slide rail assembly 11, and the lower end of the tibial support assembly 3 and the lower end of the femoral support assembly 2 are rotatably installed on the two slide block assemblies 13, respectively. In the above arrangement, the bed beam connecting assembly 12 can be arranged only one or two can be arranged at intervals along the first horizontal direction.

[0081] As shown in Figures 3 to 5 The slide rail assembly 11 includes a slide rail plate, a connecting block 112 and a plate locking assembly 113. The slide rail plate includes at least two sliding sub-plates 111 spliced along the first horizontal direction. The upper surface of each sliding sub-plate 111 is convexly provided with a sub-rail part 1112, and the sub-rail parts 1112 are spliced in sequence to form a slide rail for sliding cooperation with the slide block assembly 13. Each sliding sub-plate 111 is provided with an insertion slot 1113 on the side facing the adjacent sliding sub-plate 111, and the insertion slot 1113 is provided with a side limiting part and a bottom limiting part; the connecting block 112 is arranged at the splicing position of the adjacent two sliding sub-plates 111, and the two ends of the connecting block 112 are respectively inserted into the insertion slots 1113 of the adjacent two sliding sub-plates 111. The connecting block 112 is clamped in the two side limiting parts in the first horizontal direction and is clamped in the bottom limiting part and the upper side slot wall of the insertion slot 1113 in the vertical direction; and the plate locking assembly 113 is used to fasten the adjacent two sliding sub-plates 111.

[0082] The sliding rail assembly 11 provided by the embodiment is formed by splicing at least two sliding sub-plates 111, so that the structure of the single sliding sub-plate 111 is small in size, and the transportation difficulty is reduced; the connecting block 112 is installed in the plug-in slot 1113 of the sliding sub-plate 111, the connecting block 112 splices the sliding sub-plates 111, the stability and convenience of assembly of the sliding sub-plates 111 are improved, it is ensured that the sliding sub-plates 111 can be stably maintained on the same plane after assembly, and the splicing efficiency and splicing reliability are improved; the side limiting part is arranged, the movement space of the connecting block 112 is limited, and the dislocation of the connecting block 112 after assembly of the sliding sub-plates 111 is prevented from affecting use; the plate locking assembly 113 is arranged to fasten the sliding sub-plates 111, the splicing tightness of the sliding sub-plates 111 is improved, and use problems caused by insecure splicing are avoided; the sliding rail assembly 11 is simple in structure and convenient to assemble and disassemble, the sliding rail plate can be disassembled when not in use, and cleaning and disinfection are facilitated.

[0083] Preferably, the two ends of each sub-sliding rail part 1112 are provided with sub-sliding grooves, and all the sub-sliding grooves on the same side are spliced to form a guide sliding groove; the sliding sub-plate 111 is provided with a sliding block limiting piece 14 at the two ends in the first horizontal direction, and the sliding block limiting piece 14 at least partially extends into the groove of the guide sliding groove. The guide sliding groove is used to cooperate with the sliding block assembly 13, the sliding block limiting piece 14 is arranged at the end of the guide sliding groove, the stroke of the sliding block assembly 13 is limited, and the sliding block assembly 13 is prevented from being separated from the sliding rail part 1112.

[0084] In the embodiment, two sliding sub-plates 111 are assembled into a sliding rail plate, the number of connecting blocks 112 and plate locking assemblies 113 can be reduced, and the cost is reduced. The sliding sub-plate 111 is provided with sub-sliding grooves on both sides, two sub-sliding grooves on the same side are spliced to form a guide sliding groove, and the sliding block limiting piece 14 is arranged at the two ends of the guide sliding groove. In other embodiments, the number of sliding sub-plates 111 can also be three or more.

[0085] Preferably, the plug-in slot 1113 is a stepped slot with a wide upper end and a narrow lower end, and the step surface of the stepped slot forms a bottom limiting part. This kind of arrangement makes the groove wall of the plug-in slot 1113 form a bottom limiting part, avoids additional processing of the bottom limiting part, simplifies the processing of the sliding rail plate, and can effectively prevent the connecting block 112 from being pulled out of the plug-in slot 1113 downward. In other embodiments, the plug-in slot 1113 can also be a trapezoidal slot with a width gradually decreasing from top to bottom.

[0086] Preferably, the insertion slot 1113 penetrates the bottom surface of the sliding sub-plate 111, and the insertion slot 1113 penetrates the sliding sub-plate 111 along the first horizontal direction. By penetrating the sliding sub-plate 111 through the insertion slot 1113, the processing difficulty of the sliding sub-plate 111 is reduced, and the contact area between the sliding sub-plate 111 and the operating bed 200 is reduced, thereby reducing the friction when the sliding rail plate slides relative to the operating bed 200, and the weight of the sliding sub-plate 111 is also reduced, so that the sliding sub-plate 111 is more convenient to use.

[0087] Preferably, the insertion slot 1113 is located between the sub-sliding grooves of the adjacent two sliding sub-plates 111, that is, it is arranged below the sub-rail part 1112. By arranging the insertion slot 1113 between the sub-sliding grooves of the adjacent two sliding sub-plates 111, the upward protrusion of the sub-rail part 1112 is ensured, and space in the thickness direction is also provided for the opening of the insertion slot 1113.

[0088] Preferably, the side limiting part includes a limiting column 1114, which is protrudingly arranged at the upper side groove wall of the insertion slot 1113; the connecting block 112 is provided with a limiting groove 1121 on the opposite sides in the first horizontal direction, and the limiting column 1114 abuts against the groove bottom of the corresponding limiting groove 1121. By arranging the limiting column 1114, the insertion slot 1113 can be arranged penetrating the sliding sub-plate 111 along the first horizontal direction, and the flexibility of arranging the insertion slot 1113 can be improved. In other embodiments, the side groove wall of the insertion slot 1113 perpendicular to the first horizontal direction can serve as the side limiting part.

[0089] Each sliding sub-plate 111 includes a base plate part 1111, which has an L-shaped structure including a main sliding plate part and a connecting sliding plate part connected perpendicularly, the main sliding plate part extends along the first horizontal direction, the connecting sliding plate part extends along the second horizontal direction towards the direction of the adjacent bed side cross beam 201, the sub-rail part 1112 and the insertion slot 1113 are arranged on the base plate part 1111, and the end of the connecting sliding plate part is connected with the bed beam connecting assembly 12. This arrangement can ensure that there is a certain distance between the main sliding plate part and the edge of the operating bed 200, that is, the tibial support assembly 3 has a certain distance from the edge of the operating bed 200, thereby improving the convenience of the patient lying on the operating bed 200; at the same time, the connecting sliding plate part extends along the direction towards the bed side cross beam 201, which can reduce the overall size of the sliding rail assembly 11 while improving the convenience of connecting the sliding rail assembly 11 to the bed side cross beam 201 through the bed beam connecting assembly 12. The connecting sliding plate part and the main sliding plate part of the adjacent two sliding sub-plates 111 are arranged in correspondence.

[0090] The installation boss 1115 is provided at one end of the connecting sliding plate part away from the main sliding plate part, the thickness of the installation boss 1115 is greater than the thickness of the base plate part 1111, the installation bosses 1115 of the adjacent two sliding sub-plates 111 are spliced, and the plate locking assembly 113 is installed on the installation boss 1115. The installation boss 1115 is separately provided at the position where the plate locking assembly 113 is installed, the sliding sub-plate 111 is thickened, the space for installing the plate locking assembly 113 is ensured, the structure of the sliding sub-plate 111 is light, and the sliding sub-plate 111 is not too thick and heavy due to the installation requirement of the plate locking assembly 113; meanwhile, the installation boss 1115 can also avoid interference with the sub-sliding rail part 1112; furthermore, the installation boss 1115 is also beneficial to improving the convenience of connecting the sliding rail assembly 11 and the bed beam connecting assembly 12.

[0091] As shown in Figure 5 Preferably, one of the adjacent two sliding sub-plates 111 is a first sliding sub-plate 111a, and the other is a second sliding sub-plate 111b. The plate locking assembly 113 includes a connecting piece 1131 and a plate locking piece 1132, the first end of the connecting piece 1131 is fixedly connected with the first sliding sub-plate 111a, the second end of the connecting piece 1131 is inserted into the second sliding sub-plate 111b, and a clamping groove is formed in the circumferential surface of the second end of the connecting piece 1131; the plate locking piece 1132 is fixedly installed on the second sliding sub-plate 111b, and the plate locking piece 1132 is matched with the clamping groove to limit the sliding of the connecting piece 1131 relative to the second sliding sub-plate 111b. The first end of the connecting piece 1131 is fixedly connected with the first sliding sub-plate 111a, and the second end is inserted into the second sliding sub-plate 111b, so that the other end of the connecting piece 1131 is directly inserted into the second sliding sub-plate 111b after being fixed with the first sliding sub-plate 111a, which reduces the assembly difficulty and is convenient to operate; the plate locking piece 1132 is matched with the connecting piece 1131 to prevent the connecting piece 1131 from moving along the axial direction, so as to fix the relative positions of the second sliding sub-plate 111b and the connecting piece 1131 and achieve locking.

[0092] Preferably, the connecting piece 1131 includes a threaded connecting part and an insertion part connected with each other, a fastening threaded hole is formed in the first sliding sub-plate 111a, the threaded connecting part is screwed into the fastening threaded hole, an insertion hole is formed in the second sliding sub-plate 111b, and the insertion part is inserted into the insertion hole and matched with the plate locking piece 1132. The threaded connecting part of the connecting piece 1131 is screwed into the first sliding sub-plate 111a, and then the insertion part is inserted into the second sliding sub-plate 111b, so as to achieve preliminary assembly, reduce the assembly difficulty of the sliding sub-plate 111, and be convenient to operate. In the embodiment, the connecting piece 1131 extends along the first horizontal direction, and the plate locking piece 1132 extends along the second horizontal direction.

[0093] Preferably, the connecting piece 1131 further comprises a limiting part connected between the threaded connecting part and the insertion part, the first sliding sub-plate 111a is provided with a mounting groove on one side facing the adjacent second sliding sub-plate 111b, and the limiting part is mounted in the mounting groove and abuts against the groove bottom of the mounting groove. By providing the limiting part, the length of the threaded connecting part screwed into the first sliding sub-plate 111a is limited, and the splicing position of the sliding sub-plate 111 is ensured.

[0094] In the embodiment, the threaded connecting part is arranged at an interval from the hole bottom of the fastening threaded hole, so as to avoid the length of the fastening threaded hole and the threaded connecting part affecting the splicing of the sliding sub-plate 111, and avoid the threaded connecting part extruding the hole bottom of the fastening threaded hole.

[0095] In the embodiment, the insertion part of the connecting piece 1131 is provided with an annular groove 11311, and the head of the plate locking piece 1132 abuts against the groove bottom of the annular groove 11311 during installation, so as to improve the convenience of the plate locking piece 1132 and the insertion part in clamping or separating. Preferably, the end of the plate locking piece 1132 abuts against the opposite two side groove walls of the annular groove 11311, so as to better limit the movement of the connecting piece 1131 along the axial direction of the connecting piece 1131.

[0096] Preferably, the plate locking piece 1132 is threadedly connected with the second sliding sub-plate 111b, the plate locking piece 1132 is sleeved with a locking elastic piece 1134, and the two ends of the locking elastic piece 1134 abut against the second sliding sub-plate 111b and the plate locking piece 1132 respectively. When the plate locking piece 1132 is clamped with the connecting piece 1131, the locking elastic piece 1134 is in a compressed state. By threadedly connecting the plate locking piece 1132 with the second sliding sub-plate 111b, the locking elastic piece 1134 is in a compressed state, the elastic force of the locking elastic piece 1134 acts on the plate locking piece 1132, the engagement force between the threads is increased, the friction force between the plate locking piece 1132 and the second sliding sub-plate 111b is increased, the self-locking of the threaded connection is achieved, the movement of the plate locking piece 1132 along the axial direction of the plate locking piece 1132 is avoided, and the firmness and reliability of the connection are ensured.

[0097] To improve the installation convenience of the locking elastic piece 1134, a mounting threaded hole and a receiving hole are formed in the second sliding sub-plate 111b in communication, the mounting threaded hole is in communication between the insertion hole and the receiving hole, and the receiving hole penetrates one side wall of the second sliding sub-plate 111b along the second horizontal direction. The plate locking piece 1132 includes a threaded rod portion and a main column portion connected along an axial direction, an external thread is formed on the threaded rod portion, and the external diameter of the threaded rod portion is smaller than the external diameter of the main column portion, the threaded rod portion is screwed into the mounting threaded hole and the tail end is clamped with the insertion portion; the locking elastic piece 1134 is located in the receiving hole and is sleeved on the threaded rod portion, and the two ends of the locking elastic piece 1134 abut with the hole bottom of the receiving hole and the end face of the main column portion respectively. The end of the main column portion away from the threaded rod portion protrudes out of the receiving hole, so as to facilitate the operator to install and dismount the plate locking piece 1132.

[0098] To improve the convenience of the operator to screw the plate locking piece 1132, the end of the main column portion away from the threaded rod portion is connected with a knob portion, the cross section of the knob portion is larger than the cross section of the main column portion, so as to increase the contact area of the plate locking piece 1132 with the operator. The knob portion preferably adopts a disc structure, and an anti-skid groove is formed on the circumferential side wall thereof.

[0099] Preferably, the locking assembly further includes a anti-dropping piece 1133 which is detachably installed in the second sliding sub-plate 111b, the axial direction of the anti-dropping piece 1133 is perpendicular to the axial direction of the plate locking piece 1132, and the anti-dropping piece 1133 is inserted with the plate locking piece 1132 to limit the movement of the plate locking piece 1132 along the axial direction. The arrangement of the anti-dropping piece 1133 can limit the movement of the plate locking piece 1132 along the axial direction, so as to avoid the plate locking piece 1132 from being randomly rotated due to accident, ensure the insertion reliability of the plate locking piece 1132 with the connecting piece 1131, effectively avoid misoperation, and thus effectively avoid the loosening of the adjacent two sliding sub-plates 111 during use, and improve the locking reliability of the locking assembly.

[0100] In the embodiment, the anti-dropping piece 1133 is a jackscrew which is screwed on the second sliding sub-plate 111b along the vertical direction. In other embodiments, the anti-dropping piece 1133 can also be a structure such as a bolt.

[0101] In the embodiment, an annular groove 11321 is formed on the outer side wall of the main column portion, and the anti-dropping piece 1133 is inserted into the annular groove 11321 to prevent the plate locking piece 1132 from being pulled out. In other embodiments, a hole penetrating through the opposite two sides of the main column portion can also be arranged on the outer side wall of the main column portion, and the anti-dropping piece 1133 is inserted into the hole.

[0102] As Figures 6 to 8As shown, the bed beam connecting assembly 12 comprises a beam clamping seat 121 and a beam fastening assembly 124. The beam clamping seat 121 comprises an upper clamping seat 1211 and a lower clamping seat 1213 which are spaced apart in a vertical direction, and the upper clamping seat 1211 and the lower clamping seat 1213 cooperatively form a beam sliding groove 1214 in which the bed side beam 201 is slidably arranged. The beam fastening assembly 124 is configured to fasten and unlock the clamping seat and the bed side beam 201, so that the beam clamping seat 121 can slide relative to the bed side beam 201 when the beam fastening assembly 124 is in an unlocked state, and the beam clamping seat 121 is fixed relative to the bed side beam 201 when the beam fastening assembly 124 is in a locked state. The upper clamping seat 1211 and the lower clamping seat 1213 each extend a side limiting protrusion 1215 towards the bed side beam 201 in a direction towards the beam sliding groove 1214, and the side limiting protrusion 1215 abuts an inner side of the bed side beam 201 to prevent the bed side beam 201 from being pulled out of the beam sliding groove 1214.

[0103] In the present embodiment, in order to improve the adjustment convenience of the lower clamping seat 1213 relative to the upper clamping seat 1211, the bed beam connecting assembly 12 further comprises a seat adjusting assembly 123. The seat adjusting assembly 123 comprises a seat sliding rod 1231, a pressing rod 1232 and a pressing elastic member 1235. Specifically, the lower clamping seat 1213 is provided with an adjusting horizontal hole 12131 in a first horizontal direction; the seat sliding rod 1231 is vertically arranged and has an upper end mounted on the upper clamping seat 1211, and the seat sliding rod 1231 is slidably arranged in the lower clamping seat 1213; the pressing rod 1232 is slidably arranged in the adjusting horizontal hole 12131 and has one end exposed outside the adjusting horizontal hole 12131 to form a pressing end, and the pressing rod 1232 is provided with an adjusting through hole 12321 which is vertically and throughly formed and has a width greater than that of the seat sliding rod 1231 in the first horizontal direction, and a locking member 12341 is arranged on a side hole wall of the adjusting through hole 12321 away from the pressing end; the pressing rod 1232 has a locking position at which the locking member 12341 abuts against the seat sliding rod 1231 and a pressing position at which the locking member 12341 is separated from the seat sliding rod 1231; and the pressing elastic member 1235 is arranged in the adjusting horizontal hole 12131 and is configured to apply an elastic force to the pressing rod 1232 to make the locking member 12341 abut against the seat sliding rod 1231.

[0104] The seat adjusting assembly 123 has an initial state and a pressing state. When the seat adjusting assembly 123 is in the initial state, the seat slide rod 1231 is abutted against the locking component 12341, so that the lower clamping seat 1213 is fixed relative to the seat slide rod 1231. When the pressing end is pressed, the pressing rod 1232 slides along the first horizontal direction relative to the lower clamping seat 1213, so that the seat slide rod 1231 is out of contact with the side wall of the adjusting through hole 12321, and the lower clamping seat 1213 can slide along the seat slide rod 1231 to adjust the distance between the lower clamping seat 1213 and the upper clamping seat 1211. At this time, the seat adjusting assembly 123 is in the pressing state, and the pressing elastic element 1235 is compressed. When the pressing end is released, the pressing rod 1232 is reset under the elastic restoring force of the pressing elastic element 1235, so that the seat slide rod 1231 is abutted against the locking component 12341, that is, the seat adjusting assembly 123 returns to the initial state.

[0105] To improve the convenience of adjustment, the adjusting transverse hole 12131 penetrates through the opposite sides of the lower clamping seat 1213 to form two pressing openings. The pressing rod 1232 is provided with two pressing rods 1232 in the adjusting transverse hole 12131. The opposite ends of the two pressing rods 1232 form two pressing ends, respectively. The two pressing ends are exposed through the two pressing openings, respectively. The pressing elastic element 1235 is arranged between the two pressing rods 1232 and abuts against the two pressing rods 1232 at both ends. The adjusting through hole 12321 and the seat slide rod 1231 are arranged one by one with the pressing rod 1232. Thus, when adjusting the lower clamping seat 1213, the operator can press the pressing ends of the two pressing rods 1232 by fingers to make the two pressing rods 1232 out of contact with the seat slide rod 1231, thereby improving the convenience of adjustment and facilitating the sliding operation of the lower clamping seat 1213 by the operator. At the same time, the force balance and sliding stability of the lower clamping seat 1213 are improved.

[0106] To improve the position stability between the seat slide rod 1231 and the pressing rod 1232 when the seat adjusting assembly 123 is in the initial state, in the embodiment, a locking groove 12311 is formed in the side wall of the seat slide rod 1231 away from the pressing end. The locking groove 12311 extends along the second horizontal direction and is spaced apart along the vertical direction. The locking component 12341 can be clamped into any locking groove 12311, thereby ensuring the relative fastening of the pressing rod 1232 and the seat slide rod 1231 in the initial state and avoiding the sliding of the lower clamping seat 1213 relative to the seat slide rod 1231 in the non-pressing state.

[0107] Preferably, the cross section of the locking groove 12311 is V-shaped, trapezoidal or arc-shaped structure to improve the locking reliability. The cross section shape of the locking component 12341 is consistent with that of the locking groove 12311 to improve the locking stability and reliability.

[0108] As Figure 8 andFigure 9 As shown in the drawings, in the present embodiment, the pressing rod 1232 is inserted with the locking rod 1234 along the second horizontal direction, the locking rod 1234 partially extends into the adjusting through hole 12321, and the part of the locking rod 1234 located in the adjusting through hole 12321 forms the locking component 12341. Thus, the processing and replacement convenience of the locking component 12341 can be improved. In other embodiments, the locking component 12341 can be integrally formed on the inner wall of the adjusting through hole 12321.

[0109] Preferably, both ends of the locking rod 1234 are in a cylindrical structure to improve the convenience of the locking rod 1234 inserted into the pressing rod 1232. The end of the locking rod 1234 is in a circular arc or circular truncated cone structure to guide the insertion of the locking rod 1234 into the pressing rod 1232. After the locking rod 1234 is inserted into the pressing rod 1232, the locking rod 1234 is recessed in the pressing rod 1232 to avoid the contact between the locking rod 1234 and the hole wall of the adjusting through hole 12131.

[0110] As shown in the drawings, Figure 7 and Figure 10 To ensure that the locking groove 12311 of the seat slide rod 1231 is aligned with the locking component 12341 after installation, the upper end of the seat slide rod 1231 is cut with an installation flat surface 12312, so that the upper end of the seat slide rod 1231 is in a non-circular cross section. The upper end of the upper clamping seat 1211 is provided with a rod insertion hole, the cross-sectional shape of the rod insertion hole is the same as that of the upper end of the seat slide rod 1231, and the upper end of the seat slide rod 1231 is inserted into the rod insertion hole to ensure that the seat slide rod 1231 cannot rotate relative to the upper clamping seat 1211 and ensure the reliability of the installation position of the seat slide rod 1231 in the circumferential direction. In the present embodiment, one installation flat surface 12312 is provided on each of the opposite sides of the seat slide rod 1231.

[0111] The upper end of the seat slide rod 1231 is provided with a rod threaded hole through the installation flat surface 12312, the upper clamping seat 1211 is provided with a rod fastening hole, the rod fastening hole is aligned with the rod threaded hole, and the seat slide rod 1231 and the upper clamping seat 1211 are fastened and connected by the first fastening screw 125 inserted into the rod fastening hole and the rod threaded hole. The lower end of the seat slide rod 1231 is provided with a lower limiting portion 12313 in the radial direction, the lower limiting portion 12313 is limited to pass through the lower clamping seat 1213 to limit the maximum stroke of the downward sliding of the lower clamping seat 1213.

[0112] As shown in the drawings, Figure 7 and Figure 8To limit the pressing stroke of the pressing rod 1232 and avoid the side wall of the adjusting through hole 12321 towards the pressing end being in contact with the seat slide rod 1231 when the pressing rod 1232 is in the pressing state, one of the pressing rod 1232 and the lower clamping seat 1213 is provided with an adjusting limiting hole 12322 extending along a first horizontal direction, and the other is connected with an adjusting limiting piece 1233 which is inserted into the adjusting limiting hole 12322 and can move along a second horizontal direction in the adjusting limiting hole 12322. When the adjusting limiting piece 1233 abuts against the side of the adjusting limiting hole 12322 towards the pressing end, the seat slide rod 1231 is spaced apart from the hole wall of the adjusting through hole 12321.

[0113] In the embodiment, the adjusting limiting hole 12322 is arranged on the pressing rod 1232, the adjusting limiting piece 1233 is inserted into the lower clamping seat 1213, and the adjusting limiting piece 1233 is arranged along the vertical direction. Preferably, the adjusting limiting piece 1233 is a screw rod to improve the installation convenience of the adjusting limiting piece 1233 on the lower clamping seat 1213.

[0114] To improve the processing convenience of the beam clamping seat 121, the beam clamping seat 121 further comprises an intermediate seat 1212 between the upper clamping seat 1211 and the lower clamping seat 1213, the seat slide rod 1231 passes through the intermediate seat 1212, and the beam fastening assembly 124 is installed on the intermediate seat 1212. Thus, the beam fastening assembly 124 and the seat adjusting assembly 123 are respectively installed on the intermediate seat 1212 and the lower clamping seat 1213, which can simplify the structure of the lower clamping seat 1213 and the intermediate seat 1212 and improve the processing convenience; at the same time, the seat adjusting assembly 123 is arranged on the lower clamping seat 1213, so that the intermediate seat 1212 and the beam fastening assembly 124 can be kept fixed relative to the upper clamping seat 1211 or adjusted together with the lower clamping seat 1213 when the lower clamping seat 1213 is adjusted, improving the adjusting flexibility. In other embodiments, the intermediate seat 1212 can be integrally formed with the upper clamping seat 1211, or the intermediate seat 1212 can be integrally formed with the lower clamping seat 1213.

[0115] Further, the upper clamping seat 1211 is connected with guide rods 122, the upper ends of the guide rods 122 are connected with the upper clamping seat 1211, the guide rods 122 slide through the middle seat 1212, the guide rods 122 are spaced apart in the second horizontal direction, two, the lower clamping seat 1213 and the beam fastening assembly 124 are located between the two guide rods 122. This kind of setting, so that the middle seat 1212 can slide downward relative to the upper clamping seat 1211, to adjust the height position of the beam fastening assembly 124; at the same time, the lower clamping seat 1213 is located between the two guide rods 122, which can reduce the width of the lower clamping seat 1213 in the first horizontal direction, so that the operator can press the two pressing rods 1232 at the same time through one hand, improve the operation convenience of the pressing rod 1232.

[0116] The guide rod 122 preferably includes a main rod body 1221 radially protruding from the upper limiting portion 1222 of the main rod body 1221, the main rod body 1221 passes through the upper clamping seat 1211 and the middle seat 1212. The lower end of the main rod body 1221 is preferably a circular arc surface to improve the smoothness of the main rod body 1221 passing through the upper clamping seat 1211 and the middle seat 1212. The upper limiting portion 1222 is located on the upper side of the upper clamping seat 1211 and is limited to pass into the upper clamping seat 1211. For the bed beam connecting assembly 12 connected with the femoral support assembly 2, the upper limiting portion 1222 of the guide rod 122 can abut against the upper end surface of the upper clamping seat 1211. For the bed beam connecting assembly 12 connected with the slide rail assembly 11, the upper end of the upper limiting portion 1222 abuts against the upper end surface of the mounting boss 1115 (as shown). Figure 3

[0117] Further, the middle seat 1212 is screwed with a second fastening screw 126 in the second horizontal direction, the end of the second fastening screw 126 abuts against the seat sliding rod 1231, so that when the second fastening screw 126 is tightened, the middle seat 1212 is fixed relative to the seat sliding rod 1231, that is, the middle seat 1212 is relatively fixed with the upper clamping seat 1211; when the second fastening screw 126 is loosened, the middle seat 1212 can slide along the guide rod 122 and the seat sliding rod 1231.

[0118] As Figure 6 and Figure 11 ​As shown, the beam fastening assembly 124 comprises a beam locking rod 1241 and a beam locking knob 1242, the beam locking rod 1241 extends along the second horizontal direction and is screwed in the intermediate seat 1212, the first end of the beam locking rod 1241 is connected with the beam locking knob 1242, the second end of the beam locking rod 1241 can extend out of the intermediate seat 1212 and abut against the bed side beam 201, and the beam locking knob 1242 is located on the side of the intermediate seat 1212 away from the bed side beam 201. When the beam locking knob 1242 is rotated, the beam locking rod 1241 is driven to move in the direction close to or away from the bed side beam 201, when the beam locking rod 1241 abuts against the bed side beam 201, the relative fixation of the bed side beam 201 and the intermediate seat 1212 is realized, that is, the base assembly 1 is fixed at the bed side beam 201; when the beam locking rod 1241 is separated from the bed side beam 201, the beam fastening assembly 124 can slide along the bed side beam 201 to adjust the position of the base assembly 1 on the operating bed 200.

[0119] The beam fastening assembly 124 further comprises a locking elastic member 1243, the locking elastic member 1243 is sleeved on the beam locking rod 1241, and the locking elastic member 1243 is used for applying an elastic force to the beam locking rod 1241 towards the bed side beam 201, so that the self-locking of the threaded connection of the beam locking rod 1241 and the intermediate seat 1212 can be better realized, and the fastening reliability of the beam fastening assembly 124 is improved. Further, a containing groove 12121 is formed on the side of the intermediate seat 1212 towards the bed side beam 201, the locking elastic member 1243 is arranged in the containing groove 12121 and abuts against the groove bottom of the containing groove 12121. The second end of the beam locking rod 1241 is provided with an abutting protrusion, the other end of the locking elastic member 1243 abuts against the abutting protrusion, so that the locking elastic member 1243 is limited between the groove bottom of the containing groove 12121 and the abutting protrusion.

[0120] The beam locking knob 1242 and the beam locking rod 1241 are preferably connected by a fastening screw. Further, a threaded hole is formed on the intermediate seat 1212, the beam locking rod 1241 comprises a connecting shaft portion, a screw main portion and the above-mentioned abutting protrusion which are coaxially connected in sequence, the screw main portion is threadedly penetrated in the intermediate seat 1212, the connecting shaft portion is inserted in the beam locking knob 1242 and is connected with the beam locking knob 1242 by the fastening screw, and the outer diameters of the connecting shaft portion, the screw main portion and the abutting protrusion gradually increase. That is, in assembly, the beam locking rod 1241 is inserted in the intermediate seat 1212 from the side where the containing groove 12121 is located, and the connecting shaft portion extends out of the intermediate seat 1212; then, the connecting shaft portion is connected with the beam locking knob 1242 by the fastening screw.

[0121] The above arrangement enables the abutting protrusion to limit the beam locking rod 1241 from being pulled out of the threaded hole in the direction away from the bed side beam 201, and the abutting between the beam locking knob 1242 and the middle seat 1212 can limit the beam locking rod 1241 from being pulled out of the threaded hole in the direction towards the bed side beam 201, thereby improving the mounting stability of the beam fastening assembly 124 on the middle seat 1212, and also limiting the axial adjustment stroke of the beam locking rod 1241. Preferably, the cross section of the connecting shaft part is rectangular to avoid relative rotation between the beam locking knob 1242 and the beam locking rod 1241, thereby ensuring the adjustment reliability.

[0122] As shown in Figure 12 and Figure 13 The sliding block assembly 13 comprises a sliding seat 131, and the lower end surface of the sliding seat 131 is provided with a sliding groove 1313 for cooperating with the sliding rail part 1112 of the sliding rail assembly 11, and the sliding rail part 1112 is slidably arranged in the sliding groove 1313. The shape of the sliding groove 1313 is the same as the cross-sectional shape of the sliding rail part 1112, and the sliding groove 1313 is preferably a stepped hole with a wide upper part and a narrow lower part, i.e., the lower ends of the opposite two groove walls of the sliding groove 1313 are provided with inwardly extending limiting protrusions, and the two limiting protrusions cooperate with the two guide sliding grooves on the two sliding rail plates to limit the sliding rail part 1112 from being pulled out of the sliding groove 1313. The sliding groove 1313 can also be a dovetail groove with a wide upper part and a narrow lower part.

[0123] The sliding seat 131 is provided with a sliding locking knob 134 from top to bottom, and the lower end of the sliding locking knob 134 extends into the sliding groove 1313 and can abut against the sliding rail part 1112 to fasten the sliding seat 131 relative to the sliding rail part 1112. The sliding locking knob 134 is preferably arranged at a corner of the sliding seat 131 to avoid interference with other structures on the sliding seat 131.

[0124] To realize the rotational connection between the tibial support assembly 3 and the sliding seat 131, the lower end of the tibial support assembly 3 is provided with a tibial rotating ball head 34, and the upper end of the sliding seat 131 is provided with a spherical groove, and the tibial rotating ball head 34 is rotatably arranged in the spherical groove. To improve the installation and adjustment convenience of the tibial rotating ball head 34 in the spherical groove, the sliding seat 131 comprises two sliding blocks, and opposite surfaces of the two sliding blocks are each provided with a hemispherical groove, and the two hemispherical grooves jointly form the spherical groove. The sliding block assembly 13 further comprises a clamping and adjusting assembly 133 for enabling the two sliding blocks to be folded or spread apart, so that the two sliding blocks can be switched between a clamping state of clamping the tibial rotating ball head 34 and an adjusting state of enabling the tibial rotating ball head 34 to rotate in the spherical groove.

[0125] In the embodiment, the two sliding seats are a fixed sliding seat 1311 and a movable sliding seat 1312, wherein the lower end surface of the fixed sliding seat 1311 is provided with the sliding groove 1313, the upper end of the fixed sliding seat 1311 is provided with a mounting groove, the mounting groove penetrates through the opposite sides of the fixed sliding seat 1311 along the first horizontal direction and one side along the second horizontal direction, and the movable sliding seat 1312 is arranged in the mounting groove. The groove side wall of the mounting groove forms a butt joint surface, the butt joint surface is provided with a hemispherical groove, and the side of the movable sliding seat 1312 facing the butt joint surface is provided with a hemispherical groove. The clamping and adjusting assembly 133 drives the movable sliding seat 1312 to act, so that the movable sliding seat 1312 moves in the direction of approaching or moving away from the fixed sliding seat 1311. In this way, the sliding groove 1313 can be directly arranged on the fixed sliding seat 1311, avoiding the problem that the joint of the fixed sliding seat 1311 and the movable sliding seat 1312 forms an uneven groove bottom, affecting the smoothness of sliding, improving the processing convenience and precision of the sliding seat 131, and ensuring the smoothness of the sliding seat 131.

[0126] The two sliding seats are rotatably connected at one end along the first horizontal direction through a pivot shaft 135, the clamping and adjusting assembly 133 is connected between the second ends of the two sliding seats, and the spherical groove is located between the pivot shaft 135 and the clamping and adjusting assembly 133. The clamping and adjusting assembly 133 drives the movable sliding seat 1312 to rotate around the pivot shaft 135, so that the second end of the movable sliding seat 1312 moves in the direction of approaching or moving away from the second end of the fixed sliding seat 1311, thereby realizing the compression or release between the two sliding seats.

[0127] In order to improve the connection convenience of the two sliding seats, the fixed sliding seat 1311 extends in the direction towards the mounting groove and has a fixed protrusion, the upper end of the movable sliding seat 1312 is provided with a fixed groove, the fixed protrusion extends into the fixed groove and abuts against the groove bottom of the fixed groove. The pivot shaft 135 is a threaded member, the pivot shaft 135 penetrates through the fixed protrusion and the groove bottom of the fixed groove from top to bottom and is threadedly connected with the groove bottom of the mounting groove, so as to ensure that the movable sliding seat 1312 can rotate around the pivot shaft 135, at the same time, the pivot shaft 135 is tightly connected with the fixed sliding seat 1311, improving the connection reliability, and avoiding the downward penetration of the pivot shaft 135 into the sliding groove 1313.

[0128] The clamping adjusting assembly 133 comprises a clamping adjusting rod 1331, a locking seat 1334 is rotatably arranged in the movable sliding seat 1312, the locking seat 1334 has an internally threaded hole, the clamping adjusting rod 1331 passes through the fixed sliding seat 1311 along the second horizontal direction and has a first end extending into the movable sliding seat 1312, the first end of the clamping adjusting rod 1331 has a screw rod part 13311, the screw rod part 13311 is screwed in the internally threaded hole of the locking seat 1334. The second end of the clamping adjusting rod 1331 extends out of the fixed sliding seat 1311 away from the side of the movable sliding seat 1312 and is connected with an adjusting handle 1332. The exposed end of the clamping adjusting rod 1331 has a pressing part 13313 which always abuts against the sliding seat 131 away from the movable sliding seat 1312.

[0129] When the adjusting handle 1332 is rotated, the adjusting handle 1332 can drive the clamping adjusting rod 1331 to rotate around the axis of the clamping adjusting rod 1331, because the pressing part 13313 always abuts against the sliding seat 131, the clamping adjusting rod 1331 only rotates and cannot move along the axial direction; because the adjusting handle 1332 is threadedly connected with the locking seat 1334 and the locking seat 1334 is fixed relative to the fixed sliding seat 1311, the rotation of the clamping adjusting rod 1331 drives the locking seat 1334 to move along the extension direction of the clamping adjusting rod 1331, thereby driving the movable sliding seat 1312 to move in the direction close to or away from the fixed sliding seat 1311.

[0130] The clamping adjusting assembly 133 can be avoided to be dismounted from the sliding seat 131, the adjusting convenience and flexibility are improved; by arranging the adjusting handle 1332, the convenience and comfort of rotating the clamping adjusting rod 1331 are effectively improved, the operation comfort is improved, and the adjusting efficiency is improved; by arranging the locking seat 1334 cooperating with the clamping adjusting rod 1331, the replacement convenience of the locking seat 1334 is improved, and the service life of the sliding block assembly 13 is improved.

[0131] The lower end surface of the movable sliding seat 1312 is provided with a mounting cavity, and the side surface of the movable sliding seat 1312 facing the fixed sliding seat 1311 is provided with a rod through hole extending along the first horizontal direction, and the diameter of the rod through hole is greater than the outer diameter of the clamping adjusting rod 1331. The locking seat 1334 is rotatably installed in the mounting cavity around the vertical direction, and the rod through hole is communicated with the mounting cavity. The clamping adjusting rod 1331 is inserted into the internal threaded hole of the locking seat 1334 through the rod through hole. When the movable sliding seat 1312 is opened relative to the fixed sliding seat 1311, the direction of the rod through hole changes. By arranging the locking seat 1334 to be rotatably installed in the mounting cavity, it can be ensured that the internal threaded hole of the locking seat 1334 is always arranged along the extension direction of the clamping adjusting rod 1331 when the movable sliding seat 1312 moves, avoiding the twisting of the connection between the locking seat 1334 and the clamping adjusting rod 1331, and ensuring the adjustment reliability and service life of the clamping adjusting rod 1331. At the same time, the diameter of the rod through hole is greater than the outer diameter of the clamping adjusting rod 1331, so as to provide a space for the swing of the screw rod part 13311 of the clamping adjusting rod 1331 in the rod through hole.

[0132] The clamping adjusting rod 1331 further includes an optical axis part 13312 connected between the screw rod part 13311 and the pressing part 13313, and the fixed sliding seat 1311 is provided with a fixed rod hole extending along the second horizontal direction, and the optical axis part 13312 is arranged in the fixed rod hole. The outer diameter of the optical axis part 13312 is smaller than the outer diameter of the pressing part 13313, so that the pressing part 13313 is limited to be inserted into the fixed sliding seat 1311. The optical axis part 13312 includes a first shaft part and a second shaft part coaxially connected, the outer diameter of the first shaft part is smaller than the outer diameter of the second shaft part and equal to the outer diameter of the screw rod part 13311, and the second shaft part is in sliding fit with the fixed rod hole, so that the optical axis part 13312 is better supported in the fixed rod hole.

[0133] The adjusting handle 1332 includes a connecting sleeve part 13321 and a handle part 13322, the connecting sleeve part 13321 extends along the second horizontal direction, and the handle part 13322 is perpendicular to the extension direction of the connecting sleeve part 13321. The connecting sleeve part 13321 is sleeved outside the pressing part 13313 and connected with the second end of the clamping adjusting rod 1331. In this embodiment, when the clamping adjusting assembly 133 is in the clamping state, the handle part 13322 is horizontally arranged to avoid the external structure from being accidentally touched by the adjusting handle 1332, and also to avoid the adjusting handle 1332 from scratching the patient or medical staff, thereby improving the use safety and reliability of the clamping adjusting assembly 133. When the handle part 13322 is turned upward, the second end of the movable sliding seat 1312 is driven to move away from the fixed sliding seat 1311.

[0134] To further improve the adjustment and use convenience of the clamping adjustment rod 1331, the clamping adjustment rod 1331 further comprises a spline shaft portion 13314 coaxially connected with the screw rod portion 13311, and the spline shaft portion 13314 is located on the side of the pressing portion 13313 away from the optical axis portion 13312. The connecting sleeve portion 13321 is provided with a rod mounting hole, and the rod mounting hole comprises an optical hole portion and a spline hole portion arranged side by side, the spline shaft portion 13314 is matched with the spline hole portion, the pressing portion 13313 is slidingly inserted into the optical hole portion, and the spline shaft portion 13314 is circumferentially spaced apart and provided with a plurality of spline grooves, and the spline grooves extend along the second horizontal direction.

[0135] When the spline shaft portion 13314 and the spline hole portion are matched, the clamping adjustment rod 1331 is fixed in the circumferential direction with the adjustment handle 1332, and the rotation of the adjustment handle 1332 drives the rotation of the clamping adjustment rod 1331. The arrangement of the spline grooves enables the connecting sleeve portion 13321 to move axially relative to the spline shaft portion 13314, so that when the adjustment handle 1332 is pulled away from the sliding seat 131, the spline shaft portion 13314 and the spline hole portion can be separated, so that the adjustment handle 1332 can rotate relative to the clamping adjustment rod 1331. That is, when the adjustment handle 1332 is rotated to the state that the two sliding seats clamp the tibial rotating ball head 34, if the handle portion 13322 does not reach the horizontal position, the adjustment handle 1332 can be pulled in the first horizontal direction, so that the adjustment handle 1332 can be rotated relative to the clamping adjustment rod 1331 to the state that the handle portion 13322 is in the horizontal position, and then the spline shaft portion 13314 is inserted into the spline hole portion; or when the handle portion 13322 is rotated to the horizontal position, and the two sliding seats do not reach the state of clamping the tibial rotating ball head 34, the adjustment handle 1332 can be pulled in the first horizontal direction, so that the adjustment handle 1332 can be rotated relative to the clamping adjustment rod 1331, and the handle portion 13322 is lifted upward, and then the spline shaft portion 13314 is inserted into the spline hole portion, so that the adjustment handle 1332 can be further rotated to drive the rotation of the clamping adjustment rod 1331, thereby avoiding the problem that the handle portion 13322 cannot be continuously rotated due to the interference of the slide rail assembly 11.

[0136] To limit the sliding of the adjustment handle 1332 to disengage from the clamping adjustment rod 1331, in the embodiment, the end of the clamping adjustment rod 1331 is connected with a sliding limiting piece 1333, and the connecting sleeve portion 13321 can abut against the sliding limiting piece 1333 to limit the stroke of the connecting sleeve portion 13321 moving away from the sliding seat 131.

[0137] Preferably, the inner wall of the connecting sleeve part 13321 is provided with an annular limiting ring part, the sliding limiting part 1333 is installed in the inner part of the connecting sleeve part 13321, and the sliding limiting part 1333 has a fixed rod part and a limiting protrusion part, the connecting rod part 1523 is connected with the clamping adjusting rod 1331 and can pass through the limiting ring part, and the limiting protrusion part is located on the side away from the clamping adjusting rod 1331 and can abut against the limiting ring part. When the spline shaft part 13314 cooperates with the spline hole part, the limiting ring part and the limiting protrusion part are spaced apart, and the side of the limiting ring part facing the sliding seat 131 abuts against the end surface of the spline shaft part 13314. Preferably, the fixed rod part is threadedly connected with the clamping adjusting rod 1331 to adjust the maximum distance between the limiting protrusion part and the limiting ring part.

[0138] To better realize the reset of the adjusted adjusting handle 1332, the clamping adjusting assembly 133 further includes an adjusting elastic part 1335, the adjusting elastic part 1335 is sleeved on the sliding limiting part 1333 and abuts against the limiting ring part and the limiting protrusion part at both ends, and the adjusting elastic part 1335 is always in a compressed state, so that the threaded connection between the clamping adjusting rod 1331 and the locking seat 1334 is self-locked while realizing the reset of the adjusted adjusting handle 1332, thereby improving the structural stability and reliability of the clamping adjusting assembly 133 after adjustment.

[0139] Further, to improve the service life of the sliding block assembly 13, the side of the fixed sliding seat 1311 away from the movable sliding block is provided with a mounting port, and the sliding seat 131 further includes a mounting sliding seat 1318 detachably mounted in the mounting port, the clamping adjusting rod 1331 slides through the mounting sliding seat 1318, and the abutting part 13313 abuts against the mounting sliding seat 1318. The mounting sliding seat 1318 is provided to avoid the abrasion caused by the abutting part 13313 abutting against the sliding seat 131, thereby improving the replacement and maintenance convenience of the sliding seat 131. The side surface of the mounting sliding seat 1318 away from the movable sliding block 1312 is flush with the corresponding side surface of the fixed sliding seat 1311, and the upper end surface of the mounting sliding seat 1318 is flush with the upper end surface of the fixed sliding seat 1311, so as to improve the overall structural stability and reliability of the sliding seat 131 and the sliding block assembly 13.

[0140] As shown in Figures 14 to 17 To improve the smoothness of the sliding of the sliding block assembly 13, the sliding block assembly 13 further includes a sliding gasket 132 mounted on the upper side groove wall of the sliding groove 1313 for sliding cooperation with the sliding rail part 1112 of the sliding rail assembly 11. The sliding gasket 132 is made of lubricating material to reduce the friction between the sliding block assembly 13 and the sliding rail assembly 11, thereby improving the smoothness of the sliding of the sliding block assembly 13.

[0141] Specifically, the top wall of the sliding groove 1313 is provided with a gasket positioning groove 1315, and opposite side walls of the sliding groove 1313 are provided with limiting insertion grooves 1314; the sliding gasket 132 is made of a lubricating material, and includes a main gasket part and two limiting lug parts 1323 arranged on opposite sides of the main gasket part; the main gasket part is accommodated in the gasket positioning groove 1315 and protrudes downward from the top wall of the sliding groove 1313, and the two limiting lug parts 1323 are respectively inserted into the two limiting insertion grooves 1314. The gasket positioning groove 1315 can provide positioning for the installation of the sliding gasket 132; the limiting lug parts 1323 and the limiting insertion grooves 1314 can improve the installation stability and reliability of the sliding gasket 132 on the sliding seat 131, and prevent the sliding gasket 132 from being separated from the sliding seat 131 due to friction.

[0142] Further, the gasket positioning groove 1315 includes a first groove part 13151 and a second groove part 13152 which are communicated along a first horizontal direction; the groove width of the first groove part 13151, the groove width of the second groove part 13152 and the groove width of the sliding groove 1313 gradually increase; and the two limiting insertion grooves 1314 are arranged on opposite sides of the second groove part 13152. The main gasket part includes a first gasket part 1321 and a second gasket part 1322 which are connected; the limiting lug parts 1323 are arranged on both sides of an end of the second gasket part 1322 away from the first gasket part 1321; the shape of the first gasket part 1321 is the same as that of the first groove part 13151; and the width of the second gasket part 1322 along a second horizontal direction is smaller than the width of the second groove part 13152 and larger than the width of the first gasket part 1321.

[0143] The above arrangement makes it possible to insert one limiting lug part 1323 into the limiting insertion groove 1314 by deflecting the sliding gasket 132, and then reversely turn the sliding gasket 132 to insert the other limiting lug part 1323 into the sliding gasket 132 when the sliding gasket 132 is installed into the gasket positioning groove 1315, so as to reliably install the sliding gasket 132 on the sliding seat 131 and more effectively prevent the sliding gasket 132 from being separated from the sliding seat 131, and better ensure the setting reliability and stability of the sliding gasket 132 on the sliding seat 131; at the same time, compared with directly inserting the two limiting lug parts 1323 of the sliding gasket 132 into the two limiting insertion grooves 1314, this assembly method can increase the length of the limiting lug part 1323, so as to enhance the limiting effect of the limiting lug part 1323 after being matched with the limiting insertion groove 1314.

[0144] In the embodiment, the width of the limiting lug 1323 in the first horizontal direction is less than the width of the limiting slot 1314 in the first horizontal direction, so that the limiting lug 1323 can rotate in the limiting slot 1314 by a certain angle. Preferably, the width difference of the limiting slot 1314 in the first horizontal direction and the width of the limiting lug 1323 is less than half the length of the limiting lug 1323, so as to avoid the limiting lug 1323 from easily coming out of the limiting slot 1314 and losing the limiting effect. Further, the length of the limiting lug 1323 protruding from the main gasket part is 3mm-8mm, and the width difference of the limiting lug 1323 and the limiting slot 1314 is 0.5mm-2mm.

[0145] To further improve the assembly efficiency of the sliding gasket 132, the second slot part 13152 penetrates the bottom surface of the sliding seat 131 in the vertical direction, and the width of the first slot part 13151 is less than the width of the lower end slot of the sliding slot 1313. Thus, when assembling the sliding gasket 132, the sliding seat 131 can be first flipped to have the slot opening of the sliding slot 1313 upwardly arranged, and then the sliding gasket 132 is inserted into the gasket positioning slot 1315 from top to bottom. During the insertion process, the two limiting lugs 1323 are sequentially inserted into the two limiting slots 1314 by deflecting the sliding gasket 132.

[0146] Further, when the sliding gasket 132 is inserted into the gasket positioning slot 1315, the first piece part 1321 abuts against the three side slot walls of the first slot part 13151, so as to limit the horizontal position of the sliding gasket 132. One of the two side slot walls of the second slot part 13152 along the second horizontal direction abuts against the second piece part 1322, and the other side slot wall is spaced apart from the second piece part 1322. Further, the width difference of the second piece part 1322 along the second horizontal direction and the width of the second slot part 13152 along the second horizontal direction is 3mm-10mm.

[0147] To better limit the position of the sliding gasket 132 and the sliding seat 131 in the vertical direction, the side slot wall of the first slot part 13151 away from the second slot part 13152 is provided with a limiting groove 1319, the end of the sliding gasket 132 away from the limiting lug 1323 is provided with a limiting edge part 1325, the thickness of the limiting edge part 1325 is less than the thickness of the main gasket part, and the limiting edge part 1325 is inserted into the limiting groove 1319. Thus, the limiting of the sliding gasket 132 in the vertical direction can be realized by the cooperation of the limiting groove 1319 and the limiting edge part 1325. It can be understood that the side of the sliding gasket 132 away from the limiting groove 1319 can be limited by the cooperation of the limiting lug 1323 and the upper side slot wall of the limiting slot 1314.

[0148] Further, the cross section of the limiting groove 1319 is triangular, and the cross section of the limiting edge 1325 is the same as that of the limiting groove 1319. In this way, the limiting edge 1325 can be conveniently inserted into the limiting groove 1319. In other embodiments, the cross section of the limiting groove 1319 can also be rectangular or other shapes.

[0149] In the present embodiment, the first piece 1321 and the second piece 1322 are connected in a smooth transition with a circular arc, so as to reduce scratching. The groove walls of the first groove 13151 and the second groove 13152 are also connected in a smooth transition.

[0150] In order to further improve the setting stability of the sliding gasket 132 in the gasket positioning groove 1315, the length of the gasket positioning groove 1315 along the first horizontal direction is equal to the length of the main gasket along the first horizontal direction, one of the two groove walls of the gasket positioning groove 1315 along the first horizontal direction is provided with an arc-shaped limiting protrusion 1317, and the one end of the main gasket is provided with an arc-shaped groove 1324. The limiting protrusion 1317 is inserted into the arc-shaped groove 1324 and abuts against the groove wall of the arc-shaped groove 1324. In this way, the machining precision of the limiting protrusion 1317 and the arc-shaped groove 1324 can be ensured by fine machining, so as to ensure the close fit therebetween, thereby better limiting the installation of the sliding gasket 132 in the gasket positioning groove 1315.

[0151] In the present embodiment, the sliding gasket 132 is made of polyoxymethylene plastic or other materials with good lubricity and wear resistance.

[0152] As shown in Figure 18 and Figure 19 , the tibial support assembly 3 includes a rotating connecting seat 31, a tibial support frame 33 and a foot supporting piece 32. The rotating connecting seat 31 is connected with the top end of the tibial rotating ball head 34, the tibial support frame 33 and the foot supporting piece 32 are both installed on the rotating connecting seat 31, the foot supporting piece 32 is arranged at an angle with the tibial support frame 33, the foot supporting piece 32 extends away from the femoral support assembly 2 from bottom to top, the tibial support frame 33 extends towards the femoral support assembly 2 from bottom to top, and the upper end of the tibial support frame 33 is rotationally connected with the femoral support assembly 2. In this way, the leg support device can support the patient's feet, improve the comfort of the patient during the operation, and avoid the patient's feet from shaking during the operation.

[0153] The rotating connecting seat 31 comprises a detachably connected ball head seat 311 and a supporting seat 312, the tibial rotating ball head 34 is connected to the ball head seat 311, the supporting seat 312 is connected to the upper end of the ball head seat 311, and the tibial supporting frame 33 and the foot supporting piece 32 are both mounted on the supporting seat 312. With this arrangement, the ball head seat 311 of the supporting seat 312 can be separately arranged, the processing difficulty is reduced, and the ball head seat 311 can be replaced according to the size of the tibial rotating ball head 34, without the need to replace the supporting seat 312, thereby improving the structural versatility.

[0154] The tibial rotating ball head 34 has a spherical hinge part and a mounting rod part connected to the spherical hinge part, a connecting groove is formed in the ball head seat 311, and the mounting rod part is inserted into the connecting groove. A rotation-stopping flat surface is cut on the outer wall of the upper end of the mounting rod part, a rotation-stopping convex part is arranged on the groove bottom of the connecting groove, and the rotation-stopping flat surface is in contact with the rotation-stopping convex part to limit the relative rotation of the ball head seat 311 and the ball head, thereby ensuring that the tibial supporting assembly 3 and the ball head always rotate synchronously. Two rotation-stopping flat surfaces are arranged oppositely, and the rotation-stopping convex parts are arranged one by one in correspondence with the rotation-stopping flat surfaces. The ball head seat 311 and the mounting rod part are fastened by a screw that passes through the ball head seat 311 and the mounting rod part from top to bottom.

[0155] The supporting seat 312 comprises a bottom plate part 3121 and first and second side plate parts 3122 and 3123 connected to opposite sides of the bottom plate part 3121, the first and second side plate parts 3122 and 3123 are arranged at an acute angle and both extend upwardly and away from the bottom plate part 3121, the bottom plate part 3121 is in contact with the upper end of the ball head seat 311 and detachably connected, the foot supporting piece 32 is mounted on the second side plate part 3123, and the tibial supporting frame 33 is mounted on the inner side of the first side plate part 3122. Thus, the angle between the tibial supporting frame 33 and the foot supporting piece 32 can be set by the structure of the supporting seat 312, thereby improving the assembly reliability.

[0156] The foot supporting piece 32 comprises a foot supporting plate part 321 and a foot positioning plate part 322 protruding from the lower surface of the foot supporting plate part 321, a plate positioning groove is formed in the second side plate part 3123, the foot positioning plate part 322 is inserted into the plate positioning groove, and the foot supporting plate part 321 is attached to the inner side of the second side plate part 3123. The foot supporting piece 32 and the second side plate part 3123 are connected by a screw that passes through the groove bottom of the plate positioning groove and the foot positioning plate part 322 from bottom to top, the screw head is recessed in the second side plate part 3123, and the end of the screw is hidden in the foot supporting piece 32, so as to avoid the screw protruding from the foot supporting piece 32 and scratching the patient's leg, thereby improving the safety of the leg supporting device.

[0157] The foot support plate part 321 is preferably connected with a foot stop part 323 on both sides along the second horizontal direction. The foot stop part 323 extends upward and has an arc structure with an opening facing the other foot stop part 323. The foot stop part 323 is used to limit and stop the patient's leg from moving left and right. The foot stop part 323 is connected with the foot support plate part 321 in a circular arc transition, and the upper end edge of the foot stop part 323 is arranged in a curve to reduce the scratching of the patient's foot by the edge.

[0158] The length of the tibial support frame 33 along its extension direction can be adjusted, thereby adjusting the distance between the upper end of the tibial support frame 33 and the lower end of the foot support 32. It is ensured that the patient's foot can be supported on the foot support 32 while the upper end of the tibial support frame 33 is arranged opposite the patient's knee joint. This makes the leg support device better applicable to the leg fixation of patients of different heights and improves the comfort and reliability of the leg fixation of the patient.

[0159] Specifically, the tibial support frame 33 includes an upper tibial support part 331 and a lower tibial support part 332. The upper end of the upper tibial support part 331 is rotationally connected with the femoral support assembly 2, and the lower tibial support part 332 is connected with the first side plate part 3122. The upper tibial support part 331 is slidingly connected with the lower tibial support part 332 to adjust the length of the tibial support frame 33. The tibial support assembly 3 further includes a tibial locking part 35 for fixing the adjusted upper tibial support part 331 and lower tibial support part 332 to ensure the structural stability of the tibial support assembly 3 during the operation.

[0160] The upper tibial support part 331 and the lower tibial support part 332 are preferably in a rod structure to simplify the structure and reduce the weight. The cross section of the rod structure is preferably rectangular to improve the connection convenience between the upper tibial support part 331 and the lower tibial support part 332 and between the lower tibial support part 332 and the first side plate part 3122. In the embodiment, the upper side of the upper tibial support part 331 is provided with a guide sliding groove along its extension direction, and the back side of the lower tibial support part 332 is provided with a guide rail part 3321 which is slidingly inserted into the guide sliding groove. The guide sliding groove is preferably a dovetail groove to prevent the guide rail part 3321 from coming out of the guide sliding groove. In other embodiments, the positions of the guide sliding groove and the guide rail part 3321 can be interchanged.

[0161] The back side of the lower tibial support 332 is provided with a seat mounting groove, and the first side plate portion 3122 is inserted into the seat mounting groove and abuts against the groove bottom of the seat mounting groove. The back side of the guide rail portion 3321 is flush with the back side of the first side plate portion 3122 or the first side plate portion 3122 is recessed in the seat mounting groove, so as to avoid the lower side of the first side plate portion 3122 protruding from the back side of the lower tibial support 332 and affecting the sliding connection between the lower tibial support 332 and the upper tibial support 331, and increasing the sliding adjustment stroke of the lower tibial support 332 relative to the upper tibial support 331.

[0162] To improve the comfort of supporting the patient's leg, the tibial support assembly 3 further comprises a tibial support plate 333 connected to one side of the lower tibial support 332 facing the foot support 32. The width of the tibial support plate 333 in the second horizontal direction is greater than the width of the lower tibial support 332, thereby increasing the contact area of the tibial support frame 33 with the patient's calf and improving the support stability and comfort. The tibial support plate 333 is preferably provided in a curved panel shape, and the shape of the curved surface is matched with the shape of the calf, so as to further improve the support comfort of the patient's leg. The opposite two sides of the tibial support plate 333 are both upwardly bent and raised to stop the two sides of the patient's calf, so as to ensure the support stability of the patient's calf on the tibial support plate 333.

[0163] In the present embodiment, the upper and lower ends of the tibial support plate 333 are connected with the lower tibial support 332, and the tibial support plate 333 and the lower tibial support 332 are preferably integrally formed. In other embodiments, the tibial support plate 333 and the lower tibial support 332 can also be detachably connected by screws.

[0164] The upper tibial support 331 is provided with a fastening through hole along the extension direction thereof, and the tibial locking member 35 comprises a tibial locking screw, the shank of the tibial locking screw is slidingly arranged in the fastening through hole and is threadedly connected with the upper end of the lower tibial support 332, and the head of the tibial locking screw abuts against the lower side of the upper tibial support 331. Preferably, the lower tibial support 332 is provided with a weight-reducing long hole along the length direction, so as to reduce the overall weight of the lower tibial support 332, thereby reducing the overall weight of the tibial support assembly 3.

[0165] As Figure 18As shown, the length of the femoral support assembly 2 along its extending direction is adjustable, thereby being applicable to the leg fixation of patients with different leg lengths. Specifically, the femoral support assembly 2 comprises an upper femoral support 22 and a lower femoral support 21, the upper end of the upper femoral support 22 is rotatably connected with the upper end of the tibial support assembly 3, and the lower end of the lower femoral support 21 is rotatably connected with the bed beam connecting assembly 12. The lower femoral support 21 is slidably connected with the upper femoral support 22 to adjust the length of the femoral support assembly 2. The femoral support assembly 2 further comprises a femoral fastening assembly 23 for fastening the adjusted upper femoral support 22 and lower femoral support 21.

[0166] One of the upper femoral support 22 and the lower femoral support 21 is provided with a guide rail portion, and the other is provided with a sliding groove 221 extending along the extending direction of the femoral support assembly 2, the sliding rail portion 1112 is slidably arranged in the sliding groove 221, and the sliding groove 221 is preferably a dovetail groove to prevent the guide rail portion from falling out. In the embodiment, the lower side of the lower femoral support 21 is provided with a guide rail portion, and the upper femoral support 22 is provided with a sliding groove 221.

[0167] The lower femoral support 21 is provided with a fixed long hole 211 comprising a large hole portion and a small hole portion communicating along the second horizontal direction; the upper femoral support 22 is provided with a locking hole along its extending direction, the locking hole is in communication with the small hole portion. The femoral fastening assembly 23 comprises a locking screw 231 and a femoral locking knob 232, the locking screw 231 comprises a connecting screw rod and a sliding screw head connected with each other, the connecting screw rod is arranged in the small hole portion, and the sliding screw head is slidably arranged in the large hole portion and abuts against the hole bottom of the large hole portion; the femoral locking knob 232 is provided with an internally threaded hole, the connecting screw rod is threadedly screwed in the internally threaded hole, and the knob portion of the femoral locking knob 232 abuts against and presses the lower femoral support 21 and the upper femoral support 22. Preferably, a gasket is arranged between the knob portion and the lower side of the lower femoral support 21.

[0168] The upper femoral support 22 and the lower femoral support 21 are preferably rod-shaped structures to reduce weight and simplify structure.

[0169] In the embodiment, the upper end of the tibial support assembly 3 is rotatably sleeved on the connecting main shaft 41, the upper end of the femoral support assembly 2 is rotatably sleeved on the connecting main shaft 41, and the upper end of the femoral support assembly 2 and the upper end of the tibial support assembly 3 are arranged in the axial direction of the connecting main shaft 41. Thereby, the assembly and disassembly convenience of the tibial support assembly 3 and the femoral support assembly 2 on the connecting main shaft 41 can be improved.

[0170] Further, as shown in FIG. 1, the tibial support assembly 3 comprises a tibial support 31 and a tibial fastening assembly 32, the tibial support 31 is rotatably connected with the bed beam connecting assembly 12, and the tibial fastening assembly 32 is arranged on the tibial support 31 and is used for fastening the tibial support 31 and the bed beam connecting assembly 12. Figures 18 to 20As shown, the upper end of the upper tibial support 331 is connected with a tibial shaft sleeve part 334, which is sleeved on the connecting main shaft 41. The upper femoral support 22 is provided with a shaft through hole, and the connecting main shaft 41 is rotatably arranged in the shaft through hole. Preferably, the connecting main shaft 41 comprises a tibial connecting shaft part, a limiting shaft part and a femoral connecting shaft part which are coaxially connected in sequence, and the outer diameter of the limiting shaft part is larger than that of the femoral connecting shaft part and the tibial connecting shaft part. The tibial shaft sleeve part 334 is arranged on the tibial connecting shaft part, and the upper femoral support 22 is sleeved on the femoral connecting shaft part and abuts against the end face of the limiting shaft part, so as to limit the installation position of the upper femoral support 22 on the connecting main shaft 41.

[0171] Further, the cross-sectional shape of the femoral connecting shaft part is non-circular, and the shape of the shaft through hole is the same as that of the cross section of the femoral connecting shaft part, so that the connecting main shaft 41 and the femoral support assembly 2 are fixed in the circumferential direction. In the embodiment, the cross section of the femoral connecting shaft part is rectangular, and in other embodiments, the cross section of the femoral connecting shaft part can be D-shaped or circular.

[0172] In order to limit the upper femoral support 22 from being pulled out of the connecting main shaft 41, the femoral connecting shaft part is sleeved with a shaft limiting part 44, the upper femoral support 22 abuts against the shaft limiting part 44, and the upper end of the upper femoral support 22 is clamped between the shaft limiting part 44 and the connecting main shaft 41, so as to prevent the femoral support assembly 2 from moving along the axial direction of the connecting main shaft 41. The shaft limiting part 44 can be connected with the connecting main shaft 41 by screws, but is not limited thereto.

[0173] Further, the connecting main shaft 41 is sleeved with a joint support sleeve 42, the outer wall of the joint support sleeve 42 is provided with a avoiding gap, the upper end of the tibial support assembly 3 passes through the avoiding gap and is connected with the connecting main shaft 41, and the joint support sleeve 42 is used for supporting the knee joint of the patient, so as to improve the support comfort of the leg of the patient on the leg support device.

[0174] Specifically, the joint support sleeve 42 is sleeved on the tibial connecting shaft part and abuts against the end face of the limiting shaft part at one end. The axial ends of the tibial shaft sleeve part 334 abut against the opposite sides of the avoiding gap, so as to ensure the position stability of the tibial shaft sleeve part 334 and the joint support sleeve in the axial direction.

[0175] The outer diameter of the joint support sleeve 42 gradually increases from the middle to the two ends, and the outer surface of the joint support sleeve 42 is a smooth curved surface with high ends and a concave middle, so as to further increase the support comfort of the position of the knee of the patient and avoid the knee from sliding out of the joint support sleeve 42 along the axial direction of the connecting main shaft 41. The joint support sleeve 42 is preferably made of elastic materials such as rubber or silicone, so as to further improve the support comfort of the knee joint of the patient.

[0176] Further, annular grooves are formed in the end faces of the joint support sleeve 42, so that the two ends of the joint support sleeve 42 can be deformed by being pressed downward, and the upper end of the joint support sleeve 42 can further adapt to the shape of the knee joint of the patient, thereby improving the comfort of supporting the leg of the patient.

[0177] The strap fixing member 43 comprises a connecting ring part 431 and a strap fixing part 432, the connecting ring part 431 is sleeved on the connecting main shaft 41, the strap fixing part 432 extends along the radial direction of the connecting ring part 431, and a plurality of strap fixing grooves 4321 are arranged side by side along the length direction of the strap fixing part 432. The connecting ring part 431 can improve the installation convenience of the strap fixing member 43 on the connecting main shaft 41, and the strap fixing part 432 is beneficial to the fixation of the strap.

[0178] In order to further improve the connection convenience of the strap fixing member 43 on the connecting main shaft 41, the connecting ring part 431 is an open circular ring, and the two ends of the connecting ring part 431 extend outwardly and are provided with connecting plate parts 433, the two connecting plate parts 433 are oppositely arranged, the two connecting plate parts 433 are fastened by a connecting threaded part, and when the connecting threaded part is loosened, the connecting ring part 431 can slide along the connecting main shaft 41. Thus, the position of the strap fixing member 43 in the axial direction of the connecting main shaft 41 can be adjusted by sliding the connecting ring part 431 along the connecting main shaft 41, and the installation convenience of the strap fixing member 43 is improved; at the same time, the strap fixing member 43 can be applied to the installation of shafts with different outer diameters, and the versatility of the strap fixing member 43 is improved.

[0179] The plurality of strap fixing grooves 4321 are respectively first fixing grooves and second fixing grooves, the first fixing grooves and the second fixing grooves are oppositely arranged along the extension direction of the strap fixing part 432. Thus, the strap can be better wound around the strap fixing part 432, and the installation stability and flexibility of the strap on the strap fixing part 432 are improved.

[0180] Further, two strap fixing parts 432 are arranged on the connecting ring part 431, and the two strap fixing parts 432 are respectively arranged on the opposite sides of the connecting ring part 431 and extend downwardly and obliquely away from the connecting ring part 431. Thus, the connection position of the strap on the strap fixing member 43 can be increased, and the installation and arrangement flexibility of the strap is improved.

[0181] In the embodiment, two band fixing members 43 are arranged along the axial direction of the connecting main shaft 41, and are respectively located on the two sides of the upper end of the tibia support assembly 3, and one band fixing member 43 is located between the upper end of the femur support assembly 2 and the upper end of the tibia support assembly 3. Thus, the band can be arranged on both sides of the knee joint, so that the tissues on both sides of the surgical incision are pulled, the reliable exposure of the surgical incision during the operation is ensured, and the convenience of the operation is improved.

[0182] Further, one band fixing member 43 is sleeved on the tibia connecting shaft part, and the other band fixing member 43 is sleeved on the limiting shaft part, and the two band fixing members 43 are respectively located on the opposite sides of the joint support sleeve 42.

[0183] Further, the connecting main shaft 41 is a hollow shaft, so as to reduce the weight of the joint assembly 4, thereby reducing the weight of the whole leg support device.

[0184] As shown in Figure 18 , Figure 21 and Figure 22 , in order to improve the rotating connection convenience of the femur support assembly 2 and the bed beam connecting assembly 12, the upper end of the beam clamping seat 121 of the bed beam connecting assembly 12 is connected with a rotating connection assembly 15, and the lower end of the lower femur support 21 is installed with a femur rotating ball head 24, and the femur rotating ball head 24 is rotatably installed on the rotating connection assembly 15.

[0185] In the embodiment, the rotating connection assembly 15 includes a rotating seat 151 and a ball head pressing assembly. The rotating seat 151 is provided with a ball head installation slot 1513, and the femur rotating ball head 24 is rotatably installed in the ball head installation slot 1513 along the axis extending in the second horizontal direction. The ball head pressing assembly extends in the second horizontal direction and penetrates the rotating seat 151, and has oppositely arranged pressing ends and operation ends. The pressing end can selectively extend into the ball head installation slot 1513 to press the femur rotating ball head 24 against the rotating seat 151, and the operation end is exposed to the rotating seat 151.

[0186] That is, in the embodiment, the ball head pressing assembly has a pressing state of pressing the femur rotating ball head 24 and a loosening state of releasing the femur rotating ball head 24. When the ball head pressing assembly is in the pressing state, the femur rotating ball head 24 is fixed relative to the rotating seat 151, that is, it is ensured that the femur support assembly 2 will not rotate. When the ball head pressing assembly is in the loosening state, the femur rotating ball head 24 can rotate in the ball head installation slot 1513, so as to adjust the inclination angle of the femur support assembly 2 relative to the horizontal plane.

[0187] The bottom of the ball head mounting groove 1513 is a spherical surface which is in contact with the spherical surface of the femoral rotating ball head 24. The ball head mounting groove 1513 is provided with a V-shaped groove 1514 which opens upward and has opposite sides along the first horizontal direction. The maximum groove width of the V-shaped groove 1514 is greater than the diameter of the femoral rotating ball head 24. The bottom end of the V-shaped groove 1514 is lower than the center of the femoral rotating ball head 24 and higher than the bottom of the ball head mounting groove 1513. Thus, when the ball head pressing assembly is in the loosened state, the femoral rotating ball head 24 can not only rotate around the axis extending along the second horizontal direction, but also rotate around the axis extending along the second horizontal direction, improving the rotation flexibility and adjustment flexibility of the femoral rotating ball head 24 in the ball head mounting groove 1513, and further improving the adjustment flexibility of the femoral support assembly 2.

[0188] The ball head pressing assembly comprises a pressing rod 152 and a pressing adjustment knob 155. The first end of the pressing rod 152 forms a pressing end. The rotating seat 151 has an adjustment threaded hole therein, and the pressing rod 152 is screwed into the adjustment threaded hole. The second end of the pressing rod 152 is fixedly connected to the pressing adjustment knob 155, and the pressing adjustment knob 155 forms an operating end. By providing the pressing adjustment knob 155, the operation convenience and comfort of the operator rotating and adjusting the pressing rod 152 can be improved.

[0189] The rotating seat 151 is provided with a mounting shaft hole along the second horizontal direction, and the mounting shaft hole is connected to the ball head mounting groove 1513. The pressing rod 152 comprises a pressing head portion 1521, an adjustment screw portion 1522 and a connecting rod portion 1523 which are coaxially connected in sequence. The pressing head portion 1521 and the adjustment screw portion 1522 are both arranged in the mounting shaft hole, and the connecting rod portion 1523 is located outside the mounting shaft hole. The pressing head portion 1521 forms the above-mentioned pressing end, the adjustment screw portion 1522 is mounted in the adjustment threaded hole, and the connecting rod portion 1523 is connected to the pressing adjustment knob 155.

[0190] Preferably, the outer diameter of the pressing head portion 1521 is greater than the outer diameter of the adjustment screw portion 1522, so as to increase the contact area. Further, the pressing head portion 1521 is in sliding connection with the hole wall of the mounting shaft hole, so as to provide guidance for the movement of the pressing rod 152 in the mounting shaft hole. The mounting shaft hole preferably penetrates the rotating seat 151 along the second horizontal direction, so as to improve the processing convenience of the mounting shaft hole.

[0191] Preferably, the cross section of the connecting rod portion 1523 is rectangular, and the pressing adjustment knob 155 is provided with a rod fastening hole which has the same shape as the connecting rod portion 1523, so as to avoid relative rotation between the pressing rod 152 and the pressing adjustment knob 155. In this embodiment, the pressing adjustment knob 155 is sleeved outside the outer end of the pressing rod 152 and is connected by a fastening screw, so as to ensure the stability and reliability of the connection.

[0192] Further, the mounting shaft hole is detachably mounted with a screw sleeve seat 154, the screw sleeve seat 154 is provided with an adjusting screw hole, thereby avoiding the problem of high replacement cost of the rotating seat 151 caused by the abrasion of the internal thread hole due to the rotation of the pressing rod 152, and reducing the replacement and maintenance cost of the components in the rotating connection assembly 15.

[0193] Preferably, the outer wall of the screw sleeve seat 154 is threadedly connected with the inner wall of the mounting shaft hole, so as to improve the installation and dismounting convenience of the screw sleeve seat 154. Further, the mounting shaft hole comprises an axial communication light hole part and a threaded hole part, the light hole part is located between the ball head mounting groove 1513 and the threaded hole part, the inner diameter of the threaded hole part is larger than that of the light hole part, the screw sleeve seat 154 is threadedly mounted in the threaded hole part, and the pressing end is slidingly matched with the light hole part. The inner diameters of the threaded hole part and the light hole part are provided to limit the installation of the screw sleeve seat 154 in the threaded hole part, and limit the depth of the screw sleeve seat 154 inserted into the threaded hole part.

[0194] Further, the pressing rod 152 is sleeved with a pressing elastic member 156, the pressing elastic member 156 is located in the rotating seat 151, the first end of the pressing elastic member 156 is in abutment with the pressing end, the second end of the pressing elastic member 156 is in abutment with the end face of the screw sleeve seat 154, and the pressing elastic member 156 is in a compressed state. The provision of the pressing elastic member 156 is conducive to providing a clamping force for the threaded connection between the adjusting screw rod part 1522 and the adjusting screw hole, so as to realize self-locking after adjustment and ensure that the rotating connection assembly 15 is stably in the pressing position.

[0195] In order to improve the installation convenience of the pressing elastic member 156, the end of the screw sleeve seat 154 facing the pressing elastic member 156 is provided with a ring accommodating groove, and the second end of the pressing elastic member 156 is accommodated in the ring accommodating groove.

[0196] In the embodiment, the rotating seat 151 comprises a rotating sleeve part 1512 and a base part 1511, the rotating sleeve part 1512 extends along the second horizontal direction and is provided with the above-mentioned ball head mounting groove 1513, and the ball head pressing assembly is mounted on the rotating sleeve part 1512. The base part 1511 is connected to the lower end of the rotating sleeve part 1512 and is used for connecting with the bed beam connecting assembly 12.

[0197] Obviously, the above-mentioned embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. It is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A leg support device, characterized in that, include: The base assembly (1) extends along a first horizontal direction and is used for sliding on the operating table (200); The tibial support assembly (3) is mounted on the base assembly (1) at its lower end in a way that allows it to rotate around a second horizontal direction, and the length of the tibial support assembly (3) is adjustable. The femoral support assembly (2) is mounted on the base assembly (1) with its lower end rotatably mounted around the second horizontal direction. The length of the femoral support assembly (2) is adjustable, and the distance between the lower end of the femoral support assembly (2) and the lower end of the tibial support assembly (3) in the first horizontal direction is adjustable. The joint assembly (4) includes a connecting spindle (41) extending along the second horizontal direction. The upper end of the tibial support assembly (3) and the upper end of the femoral support assembly (2) are rotatably connected by the connecting spindle (41). A strap fastener (43) is provided on the connecting spindle (41) for installing a strap. The base assembly (1) includes: The slide rail assembly (11) extends along the first horizontal direction; The slider assembly (13) is slidably disposed on the slide rail assembly (11) along the first horizontal direction, and the lower end of the tibial support assembly (3) is rotatably mounted on the slider assembly (13). Two bed beam connecting assemblies (12) are provided at intervals along the first horizontal direction. The bed beam connecting assemblies (12) are used to connect with the bed side beam (201) of the operating table (200). One of the two bed beam connecting assemblies (12) is connected to one side of the slide rail assembly (11), and the other is separated from the slide rail assembly (11) and its upper end is rotatably connected to the femoral support assembly (2). The bed beam connection assembly (12) includes: The beam clamping seat (121) includes an upper clamping seat (1211) and a lower clamping seat (1213) arranged opposite each other. The upper clamping seat (1211) and the lower clamping seat (1213) together form a beam sliding groove (1214). The beam sliding groove (1214) is used to slide with the bed side crossbeam (201). The lower clamping seat (1213) is provided with an adjusting transverse hole (12131) along the first horizontal direction. A seat slide rod (1231) is vertically arranged and its upper end is installed on the upper clamping seat (1211). The seat slide rod (1231) slides through the lower clamping seat (1213). The pressing rod (1232) slides through the adjusting horizontal hole (12131) and one end is exposed through the opening of the adjusting horizontal hole (12131) to form a pressing end. The pressing rod (1232) has an adjusting through hole (12321) extending vertically. The width of the adjusting through hole (12321) in the first horizontal direction is greater than the width of the seat slide rod (1231). The side wall of the adjusting through hole (12321) away from the pressing end has a locking component (12341). The pressing rod (1232) has a locking position where the locking component (12341) abuts against the seat slide rod (1231) and a pressing position where the locking component (12341) is separated from the seat slide rod (1231). A pressing elastic element (1235) is disposed in the adjusting transverse hole (12131) and is used to apply an elastic force to the pressing rod (1232) to cause the locking member (12341) to press against the seat slide rod (1231).

2. The leg support device according to claim 1, characterized in that, The upper end of the tibial support assembly (3) is rotatably sleeved on the connecting spindle (41), the upper end of the femoral support assembly (2) is rotatably sleeved on the connecting spindle (41), and the upper ends of the femoral support assembly (2) and the upper ends of the tibial support assembly (3) are axially spaced on the connecting spindle (41). And / or, the strap fastener (43) includes a connecting ring portion (431) and a strap fixing portion (432), the connecting ring portion (431) is sleeved on the connecting spindle (41), the strap fixing portion (432) extends radially along the connecting ring portion (431), and the strap fixing portion (432) has a plurality of strap fixing grooves (4321) arranged side by side along the length direction.

3. The leg support device according to claim 2, characterized in that, Two strap fasteners (43) are provided at intervals along the axial direction of the connecting main shaft (41). The two strap fasteners (43) are located on both sides of the upper end of the tibial support assembly (3), and one strap fastener (43) is located between the upper end of the femoral support assembly (2) and the upper end of the tibial support assembly (3). And / or, a joint support sleeve (42) is fitted on the connecting spindle (41), and an avoidance notch is provided on the outer wall of the joint support sleeve (42). The upper end of the tibial support assembly (3) passes through the avoidance notch and is connected to the connecting spindle (41). The joint support sleeve (42) is used to support the patient's knee joint.

4. The leg support device according to claim 3, characterized in that, The outer diameter of the joint support sleeve (42) gradually increases from the middle to both ends, and the outer surface of the joint support sleeve (42) is a smooth curved surface with high ends and concave middle. And / or, the joint support sleeve (42) is made of rubber or silicone; And / or, the two end faces of the joint support sleeve (42) are provided with annular grooves.

5. The leg support device according to claim 2, characterized in that, The plurality of strap fixing grooves (4321) are respectively a first fixing groove with the groove opening facing upward and a second fixing groove with the groove opening facing downward, and the first fixing groove and the second fixing groove are staggered along the extension direction of the strap fixing part (432); And / or, the connecting ring portion (431) is provided with two strap fixing portions (432), the two strap fixing portions (432) are respectively provided on opposite sides of the connecting ring portion (431) and both extend downward at an angle away from the connecting ring portion (431); And / or, the connecting ring (431) is an open ring, and both ends of the connecting ring (431) extend outward with connecting plate (433) portions. The two connecting plate portions (433) are arranged opposite to each other and are fastened by connecting threaded parts. When the connecting threaded parts loosen the two connecting plate portions (433), the connecting ring (431) can slide along the connecting main shaft (41).

6. The leg support device according to claim 1, characterized in that, The upper end of the bed beam connecting assembly (12), which is separate from the slide rail assembly (11), is connected to a rotating connecting assembly (15). The rotating connecting assembly (15) includes a rotating seat (151) and a ball head pressing assembly. The rotating seat (151) has a ball head mounting groove (1513). The lower end of the femoral support assembly (2) has a femoral rotating ball head (24). The femoral rotating ball head (24) is rotatably installed in the ball head mounting groove (1513). The ball head pressing assembly passes through the rotating seat (151) along the second horizontal direction and its end can selectively extend into the ball head mounting groove (1513) to press against the femoral rotating ball head (24).

7. The leg support device according to claim 1, characterized in that, The seat slide rod (1231) has a locking groove (12311) on the side facing the locking component (12341). Multiple locking grooves (12311) are arranged side by side along the vertical direction. The locking component (12341) can be inserted into any of the locking grooves (12311). And / or, one of the pressing rod (1232) and the lower clamping seat (1213) is provided with an adjustment limiting hole (12322), and the other is connected with an adjustment limiting member (1233). The adjustment limiting hole (12322) extends along the first horizontal direction, and the adjustment limiting member (1233) is slidably disposed in the adjustment limiting hole (12322). When the adjustment limiting member (1233) abuts against the side wall of the adjustment limiting hole (12322) facing the pressing end, the seat slide rod (1231) is spaced apart from the wall of the adjustment through hole (12321).

8. The leg support device according to claim 1, characterized in that, The slider assembly (13) includes: A sliding seat (131) is provided with a sliding groove (1313) extending through the lower end of the sliding seat (131) along the first horizontal direction. A gasket positioning groove (1315) is provided at the bottom of the sliding groove (1313). Limiting slots (1314) are provided on the opposite sides of the sliding groove (1313). The sliding pad (132) is made of a lubricating material. The sliding pad (132) includes a main pad portion and two limiting ears (1323) disposed on opposite sides of the main pad portion. The main pad portion is accommodated in the pad positioning groove (1315) and protrudes downward from the bottom of the sliding groove (1313). The two limiting ears (1323) are respectively inserted into the two limiting slots (1314).

Images