Auxiliary limb fixing device for orthopedic surgery

Abstract

The auxiliary limb fixing device comprises an operating bed, moving boxes are symmetrically and slidably connected to the side walls of the operating bed in the vertical direction, sliding blocks are slidably connected into the moving boxes, the top walls of the two sliding blocks are jointly and fixedly connected with an arc-shaped plate, a groove is formed in the side wall of the arc-shaped plate, and the arc-shaped plate is fixedly connected with the sliding blocks. An arc-shaped rack is fixedly connected to the inner wall of the groove, sliding seats are symmetrically and slidably connected to the side wall of the arc-shaped plate and are of a U-shaped structure, a main shaft is rotatably connected to the side wall of each sliding seat in a penetrating mode, a gear is fixedly connected to the side wall of each main shaft, and a rotating shaft is installed on the inner wall of each sliding seat; an outer fixing plate and an inner fixing plate are installed on the side wall of the rotating shaft. According to the leg fixing device, a patient lies on the operating bed, the output end of a driving motor drives a lead screw fixedly connected with the output end to rotate, then a sliding block in threaded connection with the side wall of the lead screw drives an arc-shaped plate to move along the operating bed, and then the positions of the legs, needing to be fixed, of the patient are adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of surgical limb auxiliary fixation devices, and in particular to an orthopedic surgical limb auxiliary fixation device. Background Art

[0002] Limb-assisted fixation in orthopedic surgery involves the use of instruments or devices to maintain the stable alignment of fracture ends during and after surgery, facilitating surgical manipulation and promoting healing. Based on the principles and application scenarios, these techniques are primarily categorized into two types: external fixation and internal fixation. External fixation techniques include splinting, plaster fixation, traction fixation, and external fixators.

[0003] Currently, when performing orthopedic surgery on a patient's leg, auxiliary fixation of the leg is required. Existing auxiliary fixation devices often use circular plates to lift and fix the patient's leg. This rigid contact with the patient's leg will cause discomfort in the patient's leg during a long operation. In addition, the existing auxiliary fixation devices are not convenient for adjusting the height and angle of the leg.

[0004] To this end, we proposed an auxiliary fixation device for limbs in orthopedic surgery. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art and to propose an auxiliary fixation device for limbs in orthopedic surgery.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An auxiliary fixation device for orthopedic surgery limbs, comprising an operating table, wherein the side walls of the operating table are symmetrically connected to a moving box for sliding in a vertical direction, the inside of the moving box is slidably connected to a slider, the top walls of the two sliders are commonly fixedly connected to an arc plate, the side walls of the arc plate are provided with a groove, the inner wall of the groove is fixedly connected to an arc-shaped rack, the side walls of the arc plate are symmetrically connected to a slide seat for sliding, the slide seat is in a U-shaped structure, the side wall of the slide seat is rotatably connected to a main shaft, the side wall of the main shaft is fixedly connected to a gear, the inner wall of the slide seat is installed with a rotating shaft, and the side wall of the rotating shaft is installed with an external fixing plate and an internal fixing plate;

[0008] The external fixation plate and the internal fixation plate are both provided with a lifting mechanism to improve the fixation comfort of the patient's legs;

[0009] The external fixation plate is provided with a locking mechanism for conveniently fixing the patient's legs.

[0010] Furthermore, the lifting mechanism includes an arc-shaped airbag fixedly connected to the inner side walls of the outer fixed plate and the inner fixed plate, the side wall of the slide is fixedly connected to the box body, the inner wall of the box is sealingly and slidingly connected to the piston, the inner wall of the box is penetrated and fixedly connected with a one-way connecting tube, the end of the one-way connecting tube away from the box body is fixedly connected to the arc-shaped airbag, a one-way hole is opened on the inner wall of the box, and a plurality of tension springs are fixedly connected to the side wall of the piston, and the end of the tension spring away from the piston is fixedly connected to the inner wall of the box.

[0011] Furthermore, the piston side wall is fixedly connected to a contact plate, the contact plate and the box body are slidably connected, one end of the main shaft is fixedly connected to a one-way bearing, the one-way bearing side wall is fixedly connected to a cam, and the contact plate and the cam slide against each other.

[0012] Furthermore, a pressure safety valve is installed on the side wall of the arc-shaped airbag, and an electronic valve is installed on the side wall of the arc-shaped airbag.

[0013] Furthermore, the locking mechanism includes an inserting plate fixedly connected to one end of the outer fixing plate, the inserting plate is wedge-shaped, a locking groove is provided on the inner wall of the inserting plate, and a slot is provided on the inner wall of one end of the inner fixing plate.

[0014] Furthermore, a plurality of wedge plates are slidably connected through the inner wall of the slot, and the wedge plates come into contact with the locking slots to limit the position after the inserting plate is inserted into the slot for a certain distance.

[0015] Furthermore, one end of the plurality of wedge plates is commonly fixedly connected to a base plate, a return spring is fixedly connected to the inner wall of the base plate, an end of the return spring away from the base plate is fixedly connected to the inner fixed plate, the base plate is made of magnetic material, and an electromagnet is embedded and fixed on the inner wall of the inner fixed plate.

[0016] Furthermore, one end side wall of the two movable boxes is commonly fixedly connected with a connecting plate, one end of the operating bed is fixedly connected with a support plate, the top wall of the support plate is fixedly connected with an electric push rod, and the movable end of the electric push rod is fixedly connected to the connecting plate.

[0017] Furthermore, a servo motor is fixedly connected to the side wall of the slide, an output end of the servo motor is coaxially fixedly connected to the main shaft, and the gear is meshed with the arc-shaped rack.

[0018] Furthermore, a lead screw is rotatably connected to the inner wall of the movable box, the slider is threadedly connected to the lead screw, the side wall of the movable box is fixedly connected to a drive motor, and the output end of the drive motor is fixedly connected to the adjacent lead screw.

[0019] Compared with the existing technology, the advantages of the present invention are:

[0020] 1. The patient lies flat on the operating table. The two drive motors are started. The output ends of the drive motors drive the screws fixed to them to rotate, which in turn causes the sliders threaded onto the side walls of the screws to drive the curved plate to move along the operating table, thereby adjusting the position of the patient's legs that need to be fixed.

[0021] 2. By setting up a servo motor, an arc-shaped plate, and an arc-shaped rack structure, turning on the servo motor causes the main shaft to drive the gear to rotate, and then the slide can slide along the arc-shaped plate, and the slide drives the corresponding external and internal fixation plates to move, making it convenient to adjust the fixed angle of the patient's leg;

[0022] 3. The main shaft drives the cam to rotate through a one-way bearing. By setting up a piston, contact plate and box body, the gas drawn into the box body is squeezed into the arc-shaped airbag through a one-way connecting pipe, completing the squeezing and buffering of the patient's legs, avoiding the contact of the rigid external and internal fixation plates with the patient's legs, which would cause discomfort to the patient's legs;

[0023] 4. When it is necessary to adjust the height of the patient's legs after fixation, you only need to turn on the electric push rod. The movable end of the electric push rod drives the support plate fixed to it to move a certain distance in the vertical direction. Then the support plate will drive the two moving boxes fixed to it to move synchronously. The two moving boxes drive the arc plate to move synchronously through the slider, thereby completing the adjustment of the height of the patient's legs after fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the appearance of an auxiliary fixation device for limbs in orthopedic surgery proposed by the present invention;

[0025] Figure 2 This is a schematic diagram of the positional relationship among the connecting plate, electric push rod and support plate in an auxiliary fixation device for limbs in orthopedic surgery proposed by the present invention;

[0026] Figure 3 This is a schematic diagram of the connection relationship between the slide, main shaft, one-way bearing and other structures in the auxiliary fixation device for limbs in orthopedic surgery proposed by the present invention;

[0027] Figure 4 This is a schematic diagram of the structure inside the box of an auxiliary fixation device for limbs in orthopedic surgery proposed by the present invention;

[0028] Figure 5 This is a schematic diagram of the structure inside a slot in an auxiliary fixation device for limbs in orthopedic surgery proposed by the present invention;

[0029] Figure 6 for Figure 5 A magnified schematic diagram of the structure of part A.

[0030] In the figure: 1, operating bed; 2, moving box; 3, screw rod; 4, connecting plate; 5, sliding block; 6, arc plate; 7, groove; 8, arc rack; 9, sliding seat; 10, main shaft; 11, gear; 12, servo motor; 13, one-way bearing; 14, cam; 15, box; 16, piston; 17, contact plate; 18, tension spring; 19, one-way hole; 20, one-way connecting pipe; 21, rotating shaft; 22, outer fixed plate; 23, inner fixed plate; 24, arc-shaped air bag; 25, pressure safety valve; 26, electronic valve; 27, plug plate; 28, plug groove; 29, locking groove; 31, bottom plate; 32, electromagnet; 33, reset spring; 34, driving motor; 35, wedge-shaped plate; 36, support plate; 37, electric push rod. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0032] The embodiments, all belong to the protection scope of the present application.

[0033] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element 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.

[0034] Reference Figures 1-6, an auxiliary fixation device for limbs in orthopedic surgery, including an operating table 1, the side walls of the operating table 1 are slidably connected to a symmetrically arranged moving box 2 in the vertical direction, the inside of the moving box 2 is slidably connected to a slider 5, the top walls of the two sliders 5 are fixedly connected to an arc plate 6, the side walls of the arc plate 6 are provided with a groove 7, the inner wall of the groove 7 is fixedly connected to an arc-shaped rack 8, the side walls of the arc plate 6 are symmetrically slidably connected to a slide seat 9, the slide seat 9 is a U-shaped structure, the side wall of the slide seat 9 is rotatably connected to a main shaft 10, and the side wall of the main shaft 10 is fixedly connected It is connected to the gear 11, and a rotating shaft 21 is installed on the inner wall of the slide 9. The rotating shaft 21 consists of two rotatable shafts, so that the outer fixing plate 22 and the inner fixing plate 23 can rotate independently of each other. The outer fixing plate 22 and the inner fixing plate 23 are installed on the side walls of the rotating shaft 21; the outer fixing plate 22 and the inner fixing plate 23 are both arc-shaped structures, and the outer fixing plate 22 and the inner fixing plate 23 are jointly provided with a lifting mechanism to improve the comfort of the patient's leg fixation; the outer fixing plate 22 is provided with a locking mechanism for conveniently fixing the patient's legs.

[0035] The lifting mechanism includes an arc-shaped airbag 24 fixedly connected to the inner wall of the outer fixed plate 22 and the inner fixed plate 23. The arc-shaped airbag 24 is made of elastic material and will shrink after being exposed to external force. The side wall of the slide 9 is fixedly connected to the box body 15, and the inner wall of the box body 15 is sealed and slidably connected to the piston 16. A one-way connecting pipe 20 is fixedly connected to the inner wall of the box body 15. The end of the one-way connecting pipe 20 away from the box body 15 is fixedly connected to the arc-shaped airbag 24. A one-way hole 19 is opened on the inner wall of the box body 15. A plurality of tension springs 18 are fixedly connected to the side wall of the piston 16. The end of the tension spring 18 away from the piston 16 is fixedly connected to the inner wall of the box body 15.

[0036] A contact plate 17 is fixedly connected to the side wall of the piston 16, and the contact plate 17 and the box body 15 are slidably connected. One end of the main shaft 10 is fixedly connected to a one-way bearing 13. The one-way bearing 13 is a prior art and will not be described in detail here. A cam 14 is fixedly connected to the side wall of the one-way bearing 13, and the contact plate 17 and the cam 14 slide against each other.

[0037] A pressure relief valve 25 is installed on the side wall of the curved airbag 24. When gas is introduced into the curved airbag 24 and the internal pressure becomes excessive, the valve automatically discharges excess gas, ensuring that the internal pressure remains within a stable and safe range. The pressure relief valve 25 is an automatic pressure-regulating device that operates based on a preset pressure threshold: when the internal pressure of the airbag exceeds the set value, the valve immediately opens to release excess gas; once the pressure returns to normal, the valve automatically closes, preventing the airbag from over-inflating, rupturing, or otherwise posing a safety hazard. An electronic valve 26 is also installed on the side wall of the curved airbag 24.

[0038] The locking mechanism includes an inserting plate 27 fixedly connected to one end of the outer fixing plate 22 . The inserting plate 27 is wedge-shaped and has a locking groove 29 on its inner wall. A slot 28 is formed on the inner wall of one end of the inner fixing plate 23 .

[0039] A plurality of wedge plates 35 are slidably connected to the inner wall of the slot 28 . After the inserting plate 27 is inserted into the slot 28 for a certain distance, the wedge plates 35 contact the locking grooves 29 to limit the position.

[0040] One end of the multiple wedge plates 35 is fixedly connected to the base plate 31, and a return spring 33 is fixedly connected to the inner wall of the base plate 31. The end of the return spring 33 away from the base plate 31 is fixedly connected to the inner fixed plate 23. The base plate 31 is made of magnetic material, and an electromagnet 32 ​​is embedded and fixed on the inner wall of the inner fixed plate 23. After the electromagnet 32 ​​is energized, the energized electromagnet 32 ​​and the base plate 31 have the same polarity and form a magnetic attraction force on each other, thereby being able to drive the multiple wedge plates 35 to move through the base plate 31 to release the mutual restraint on the locking groove 29.

[0041] The side walls of one end of the two movable boxes 2 are fixedly connected to a connecting plate 4, one end of the operating bed 1 is fixedly connected to a support plate 36, and an electric push rod 37 is fixedly connected to the top wall of the support plate 36, and the movable end of the electric push rod 37 is fixedly connected to the connecting plate 4.

[0042] A servo motor 12 is fixedly connected to the side wall of the slide 9 , an output end of the servo motor 12 is coaxially fixedly connected to the main shaft 10 , and a gear 11 is meshed with the arc-shaped rack 8 .

[0043] A lead screw 3 is rotatably connected to the inner wall of the mobile box 2, the slider 5 is threadedly connected to the lead screw 3, and a drive motor 34 is fixedly connected to the side wall of the mobile box 2. The output end of the drive motor 34 is fixedly connected to the adjacent lead screw 3.

[0044] In the present invention, the patient is first allowed to lie flat on the operating bed 1, and then the two drive motors 34 are started. The output end of the drive motor 34 drives the screw 3 fixedly connected to it to rotate, and then the slider 5 threadedly connected to the side wall of the screw 3 drives the arc plate 6 to move along the operating bed 1, thereby adjusting the position of the patient's legs that need to be fixed.

[0045] In the initial state, the two slides 9 are both located at the bottom ends of the two sides of the arc-shaped plate 6. At this time, the patient's legs are placed between the corresponding external fixing plate 22 and the internal fixing plate 23. Then the user rotates the external fixing plate 22 and the internal fixing plate 23 so that the inserting plate 27 fixed at one end of the external fixing plate 22 is inserted into the slot 28 opened in the adjacent internal fixing plate 23. The inserting plate 27 is a wedge-shaped structure, and then the inserting plate 27 will slide against the inclined portion of the wedge plate 35 until the wedge plate 35 is inserted into the locking groove 29 of the inserting plate 27, completing the limit locking of the inserting plate 27.

[0046] Then the servo motor 12 is started, the output end of the servo motor 12 is rotated, so that the main shaft 10 also drives the gear 11 to rotate, the gear 11 and the arc-shaped rack 8 are connected in meshing, then the gear 11 will drive the sliding block 9 to slide along the arc-shaped plate 6 during rotation, the sliding block 9 drives the corresponding outer fixed plate 22 and the inner fixed plate 23 to move, so as to facilitate the adjustment of the fixed angle of the patient's leg.

[0047] At this time, under the action of the one-way bearing 13, the main shaft 10 will drive the cam 14 to rotate through the one-way bearing 13, so that the cam 14 continuously pushes the contact plate 17 slidingly abutting against it to slide during rotation, and under the action of the plurality of extension springs 18, the piston 16 reciprocatingly and sealingly slides, then the piston 16 will draw the gas outside into the box body 15 through the one-way hole 19, and then the gas in the box body 15 is extruded into the arc-shaped air bag 24 through the one-way connecting pipe 20, at this time, the diameter of the gear 11 is small, and the moving speed of the sliding block 9 is slow, so that when the sliding block 9 moves a small distance, enough gas enters the arc-shaped air bag 24, the extrusion and buffering of the patient's leg are completed, and the contact of the rigid outer fixed plate 22 and the inner fixed plate 23 with the patient's leg is avoided, so as to avoid the discomfort of the patient's leg.

[0048] And in the subsequent movement of the sliding block 9, gas will continue to enter the arc-shaped air bag 24, at this time, since the inner wall of the arc-shaped air bag 24 is provided with a pressure safety valve 25, the pressure safety valve 25 can discharge the excess gas in the arc-shaped air bag 24 to the outside when a certain gas pressure is reached, so as to avoid excessive extrusion of the arc-shaped air bag 24 on the patient's leg.

[0049] When it is necessary to adjust the height of the fixed leg of the patient, at this time, only the electric push rod 37 needs to be started, the movable end of the electric push rod 37 drives the support plate 36 fixedly connected thereto to move a distance along the vertical direction, then the support plate 36 drives the two moving boxes 2 fixedly connected thereto to move synchronously, the moving boxes 2 are provided with slide rails for sliding on the side of the operating bed 1, the two moving boxes 2 drive the arc-shaped plate 6 to move synchronously through the sliding block 5, so as to complete the adjustment of the height of the fixed leg of the patient.

[0050] The above describes the present application and its embodiments, which are not limited, and the drawings only show one of the embodiments of the present application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired thereby, without departing from the purpose of the present application, without creative design, similar structure and embodiments of the technical solution can be designed, which shall belong to the protection scope of the present application.

Claims

1. An auxiliary fixation device for limbs in orthopedic surgery, comprising an operating table (1), characterized in that: On the side walls of the operating table (1), moving boxes (2) are symmetrically and slidably connected along the vertical direction. Inside each of the moving boxes (2), a slider (5) is slidably connected. The top walls of the two sliders (5) are commonly fixedly connected to an arc-shaped plate (6). On the side wall of the arc-shaped plate (6), a groove (7) is provided. Inside the inner wall of the groove (7), an arc-shaped rack (8) is fixedly connected. On the side wall of the arc-shaped plate (6), sliding seats (9) are symmetrically slidably connected. The sliding seats (9) are in a U-shaped structure. A main shaft (10) is rotatably connected through the side wall of the sliding seat (9). On the side wall of the main shaft (10), a gear (11) is fixedly connected. Inside the inner wall of the sliding seat (9), a rotating shaft (21) is installed. On the side wall of the rotating shaft (21), an outer fixing plate (22) and an inner fixing plate (23) are installed; On the outer fixing plate (22) and the inner fixing plate (23), a lifting mechanism for improving the comfort of fixing the patient's legs is provided; On the outer fixing plate (22), a locking mechanism for conveniently fixing the patient's legs is provided.

2. The orthopedic surgery limb auxiliary fixation device according to claim 1, characterized in that: The lifting mechanism includes arc-shaped air bags (24) fixedly connected to the inner side walls of the outer fixing plate (22) and the inner fixing plate (23). On the side wall of the sliding seat (9), a box body (15) is fixedly connected. Inside the inner wall of the box body (15), a piston (16) is hermetically slidably connected. A one-way connecting pipe (20) is fixedly connected through the inner wall of the box body (15). The end of the one-way connecting pipe (20) far from the box body (15) is fixedly communicated with the arc-shaped air bag (24). Inside the inner wall of the box body (15), a one-way hole (19) is provided. On the side wall of the piston (16), a plurality of tension springs (18) are fixedly connected. The ends of the tension springs (18) far from the piston (16) are fixedly connected to the inner wall of the box body (15).

3. The orthopedic surgery limb auxiliary fixation device according to claim 2, characterized in that: On the side wall of the piston (16), a contact plate (17) is fixedly connected. The contact plate (17) is slidably connected through the box body (15). One end of the main shaft (10) is fixedly connected to a one-way bearing (13). On the side wall of the one-way bearing (13), a cam (14) is fixedly connected. The contact plate (17) and the cam (14) are in抵 contact and slide.

4. The orthopedic surgery limb auxiliary fixation device according to claim 3, characterized in that: On the side wall of the arc-shaped air bag (24), a pressure safety valve (25) is installed. On the side wall of the arc-shaped air bag (X), an electronic valve (26) is installed.

5. The orthopedic surgery limb auxiliary fixation device according to claim 1, characterized in that: The locking mechanism includes a plug plate (27) fixedly connected to one end of the outer fixing plate (22). The plug plate (27) is in a wedge-shaped structure. Inside the inner wall of the plug plate (27), a locking groove (29) is provided. Inside the inner wall of one end of the inner fixing plate (23), a slot (28) is provided.

6. The orthopedic surgery limb auxiliary fixation device according to claim 5, characterized in that: Inside the inner wall of the slot (28), a plurality of wedge-shaped plates (35) are slidably connected through. After the plug plate (27) is inserted into the slot (28) for a certain distance, the wedge-shaped plates (35) are in抵 contact with the locking groove (29) for limiting.

7. The orthopedic surgery limb auxiliary fixation device according to claim 6, characterized in that: One end of the plurality of wedge-shaped plates (35) is fixedly connected to a base plate (31), an inner wall of the base plate (31) is fixedly connected to a return spring (33), an end of the return spring (33) away from the base plate (31) is fixedly connected to an inner fixed plate (23), the base plate (31) is made of a magnetic material, and an electromagnet (32) is embedded and fixed on the inner wall of the inner fixed plate (23).

8. The orthopedic surgery limb auxiliary fixation device according to claim 1, characterized in that: The side walls of one end of the two movable boxes (2) are fixedly connected to a connecting plate (4), one end of the operating bed (1) is fixedly connected to a support plate (36), a top wall of the support plate (36) is penetrated and fixedly connected to an electric push rod (37), and the movable end of the electric push rod (37) is fixedly connected to the connecting plate (4).

9. The orthopedic surgery limb auxiliary fixation device according to claim 1, characterized in that: The side wall of the slide (9) is fixedly connected to a servo motor (12), the output end of the servo motor (12) is coaxially fixedly connected to the main shaft (10), and the gear (11) is meshedly connected to the arc-shaped rack (8).

10. The orthopedic surgery limb auxiliary fixation device according to claim 9, characterized in that: A lead screw (3) is rotatably connected to the inner wall of the movable box (2), the slider (5) and the lead screw (3) are threadedly connected, a drive motor (34) is fixedly connected to the side wall of the movable box (2), and the output end of the drive motor (34) is fixedly connected to the adjacent lead screw (3).

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