CN111067613B - Rotary femoral intramedullary needle extractor - Google Patents
Rotary femoral intramedullary needle extractor Download PDFInfo
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- CN111067613B CN111067613B CN201911359599.7A CN201911359599A CN111067613B CN 111067613 B CN111067613 B CN 111067613B CN 201911359599 A CN201911359599 A CN 201911359599A CN 111067613 B CN111067613 B CN 111067613B
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
- A61B17/921—Impactors or extractors, e.g. for removing intramedullary devices for intramedullary devices
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Abstract
The invention discloses a rotary femoral intramedullary needle extractor which comprises a pulling shaft and a fixing frame sleeved on a thigh, wherein a steel needle is inserted into the thigh, a fixing mechanism is installed on the inner wall of the fixing frame, the bottom of the fixing frame is connected with a base, connecting blocks are fixedly connected to the base, the two connecting blocks are respectively inserted into the fixing frame, a first fixing rod and a second fixing rod are fixedly connected to one side of the fixing frame, a pair of first connecting shafts is fixedly connected between the first fixing rod and the second fixing rod, and a pair of second connecting shafts is fixedly connected to the second fixing rod. The fixing frame, the first fixing rod and the second fixing rod form a fixed support structure, so that the position of the thigh of the patient is fixed, the workload of medical staff is reduced, special staff is not needed for fixing, the phenomenon that a direct knocking mode is too violent and too laborious is avoided, the thigh of the patient is slowly and effectively taken out of the marrow of the patient, and the operation safety is ensured.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a rotary femoral intramedullary needle extractor.
Background
The femur fracture can be caused by violent direct striking, falling from a high place, vehicle impact, rolling and the like, the femur is the largest bone of the whole body, if the serious complications such as massive hemorrhage, nerve injury and the like of a patient can be caused by untimely treatment after the fracture, the patient needs to be quickly and correctly fixed and bound, then the patient needs to be immediately sent to a hospital for treatment, a steel needle for fixing and adjusting needs to be inserted into bone marrow after the femur fracture, the fracture position of the patient is corrected, the steel needle is directly inserted into the bone marrow for correction, so the steel needle needs to be taken out after the correction is finished, after a plurality of fixing needles on the side edge of the steel needle are removed, the steel needle is generally directly connected with one end of the steel needle through an extractor, and the steel needle is directly pulled out through pulling force.
Because the steel needle is fixed inside the thighbone, inside still can be connected with materials such as marrow, the thighbone itself is the biggest bone of human body, and at the in-process that the growth was corrected, the bone can wrap up the steel needle gradually, so need use very big power way at the in-process of extraction, sometimes need many people to mutually support even, use medical hammer to extract through the mode of beating, the process of extraction is very hard.
Disclosure of Invention
The invention aims to solve the defects in the prior art, such as: the existing femur extraction mode is very laborious, and often requires multiple persons to cooperate with alternative operation, so that the rotary type femur intramedullary needle extractor is provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rotary femoral intramedullary needle extractor comprises a pulling shaft and a fixing frame sleeved on a thigh, wherein a steel needle is inserted into the thigh, a fixing mechanism is installed on the inner wall of the fixing frame, the bottom of the fixing frame is connected with a base, connecting blocks are fixedly connected to the base, the two connecting blocks are respectively inserted into the fixing frame, a first fixing rod and a second fixing rod are fixedly connected to one side of the fixing frame, a pair of first connecting shafts is fixedly connected between the first fixing rod and the second fixing rod, a pair of second connecting shafts is fixedly connected to the second fixing rod, and the two second connecting shafts are respectively positioned on the same vertical plane with the first connecting shafts; the two second connecting shafts are internally provided with connecting sleeves, the pulling shaft penetrates through the two connecting sleeves, the right end of the pulling shaft is connected with the steel needle, the left end of the pulling shaft is fixedly connected with a sliding rod, the sliding rod is connected with a sliding hammer in a sliding clamping manner, one side of the sliding hammer is rotatably connected with the pulling shaft, the steel needle is provided with a clamping groove, one end, close to the steel needle, of the pulling shaft is fixedly connected with a clamping body, the clamping body is inserted into the clamping groove, a clamping mechanism is installed in the clamping body, and the clamping body is connected with the clamping groove through the clamping mechanism; two fixedly connected with third dead lever between the first connecting axle, set up smooth chamber in the third dead lever, sliding connection control lever in the smooth chamber, the left side fixedly connected with gasbag of control lever, install one-way circulation mechanism on the smooth chamber, the right side fixedly connected with fixed axle of control lever, the fixed axle is kept away from the one end of control lever and is installed adjustment mechanism, the activity groove has been seted up on the second dead lever, control lever and activity groove sliding connection, the lower extreme of control lever is connected with the card axle, the control lever through the card axle with draw and get the hub connection.
Preferably, fixed establishment includes a pair of connecting band, two equal sliding connection a pair of telescopic shaft on the connecting band, the inner wall fixed connection of telescopic shaft and mount, the magic subsides are all installed at the both ends of connecting band.
Preferably, the clamping mechanism comprises a pair of L-shaped shafts, a moving groove is formed in the clamping body, the two L-shaped shafts are both installed in the moving groove, a moving block is fixedly connected to one end of each L-shaped shaft, the two moving blocks are both connected with the clamping body in a sliding mode, a fourth connecting spring is connected between the two L-shaped shafts, a limiting shaft is inserted between the two L-shaped shafts, a third connecting spring is sleeved on the limiting shaft, two ends of the third connecting spring are respectively fixedly connected with the L-shaped shafts, and the other ends of the two L-shaped shafts are clamped with the inner wall of the clamping groove.
Preferably, the third fixed link is internally and symmetrically provided with connecting grooves, two ends of the limiting shaft are respectively inserted into the connecting grooves, two ends of the limiting shaft are fixedly connected with limiting blocks, the inner wall of each connecting groove is provided with a limiting groove corresponding to each limiting block, and each limiting block is slidably connected with the corresponding limiting groove.
Preferably, adjustment mechanism includes a plurality of threaded rods, the one end fixedly connected with fixed block that the control lever was kept away from to the fixed axle, the screw thread has cup jointed a pair of thread bush on the threaded rod, two the bilateral symmetry of thread bush rotates and is connected with the universal driving shaft, wherein two the universal driving shaft rotates with the fixed block to be connected, another two the universal driving shaft rotates and is connected with the sliding shaft, sliding shaft and third dead lever sliding connection, the both ends symmetry of sliding shaft installs the moving mechanism, the sliding shaft passes through the moving mechanism and is connected with the third dead lever, the opening has been seted up on the first dead lever, the threaded rod passes the opening, the one end fixedly connected with carousel of third dead lever is kept away from to the threaded rod, it is connected with the handle to rotate on the carousel, the power spring has been cup jointed with the junction of carousel to the handle.
Preferably, the moving mechanism includes the second loose axle, the spout has been seted up to the both ends symmetry of loose axle, the central fixedly connected with third slider of the card body, third slider and spout sliding connection, the both ends loose-leaf of second loose axle is connected with first loose axle, the one end fixedly connected with tooth block of second loose axle is kept away from to first loose axle, the tooth's socket has been seted up to the symmetry on the third dead lever, tooth block and tooth's socket meshing joint, install second connecting spring in the spout, second connecting spring and third slider fixed connection.
Preferably, the one-way circulation mechanism includes the toper piece, the intercommunication mouth has been seted up to one side of third dead lever, toper piece joint is on the intercommunication mouth, the bilateral symmetry fixedly connected with of intercommunication mouth inserts the axle, the one end fixedly connected with second slider of toper piece, two it all passes the second slider to insert the axle, insert and cup joint first connecting spring on the axle, first connecting spring's one end and second slider fixed connection, the other end of first connecting spring and the outer wall fixed connection of third dead lever.
Preferably, a first sliding block is connected in the movable groove in a sliding mode, a rotating block is connected to one side of the first sliding block in a rotating mode, an insertion opening is formed in the control rod, the rotating block penetrates through the insertion opening, and a return spring is sleeved at the connecting position of the rotating block and the first sliding block.
Preferably, the upper end fixedly connected with rectangular block of card axle, the rectangular block is inserted and is established on the control lever, the lower extreme and the axle joint of drawing of card axle.
Preferably, the base is symmetrically provided with buckles, the fixing frame is provided with an operating bed below, the operating bed is provided with buckle grooves corresponding to the buckles, and the buckles are connected with the buckle grooves in a clamping mode.
Compared with the prior art, the invention has the beneficial effects that: a fixed bracket structure is formed by the fixing frame, the first fixing rod and the second fixing rod, so that the position of the thigh of the patient is fixed, the workload of medical staff is reduced, and special staff is not needed for fixing;
through the threaded rod, draw mutually supporting of getting axle, universal driving shaft and control lever, can be through screw thread pivoted mode, take out the steel needle from the patient is internal, avoid directly knocking the mode too fiercely and too hard, slowly effectually take out it from the patient marrow, guarantee the security of operation.
Drawings
FIG. 1 is a schematic view of a rotary femoral intramedullary needle extractor according to the present invention;
FIG. 2 is a schematic structural view of a rotary femoral intramedullary needle extractor fixing mechanism according to the present invention;
FIG. 3 is a schematic view of the structure at A in FIG. 1;
FIG. 4 is a schematic view of the structure at B in FIG. 1;
fig. 5 is a schematic structural diagram at C in fig. 1.
In the figure: 1 base, 2 connecting blocks, 3 steel needles, 4 fixing frames, 5 second fixing rods, 6 first fixing rods, 7 first connecting shafts, 8 threaded sleeves, 9 turntables, 10 handles, 11 threaded rods, 12 linkage shafts, 13 tooth grooves, 14 fixing shafts, 15 air bags, 16 sliding rods, 17 sliding hammers, 18 pulling shafts, 19 pulling shafts, 20 control rods, 21 rotating blocks, 22 clamping shafts, 23 rectangular blocks, 24 first sliding blocks, 25 connecting sleeves, 26 a second connecting shaft, 27 a connecting belt, 28 a telescopic shaft, 29 a moving groove, 30 a limiting shaft, 31 a third fixing rod, 32 a clamping groove, 33 a moving block, 34 a clamping body, 35 a fourth connecting spring, 36L-shaped shafts, 37 a third connecting spring, 38 a connecting groove, 39 a sliding shaft, 40 a first movable shaft, 41 a third sliding block, 42 a second connecting spring, 43 a second movable shaft, 44 a toothed block, 45 a sliding groove, 46 a inserting shaft, 47 a first connecting spring, 48 a second sliding block and 49 a conical block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-5, a rotary femoral intramedullary nail extractor comprises a pulling shaft 19 and a fixing frame 4 sleeved on a thigh, wherein a steel needle 3 is inserted into the thigh, a fixing mechanism is installed on the inner wall of the fixing frame 4, the bottom of the fixing frame 4 is connected with a base 1, the base 1 is fixedly connected with connecting blocks 2, the two connecting blocks 2 are respectively inserted on the fixing frame 4, one side of the fixing frame 4 is fixedly connected with a first fixing rod 6 and a second fixing rod 5, a pair of first connecting shafts 7 is fixedly connected between the first fixing rod 6 and the second fixing rod 5, a pair of second connecting shafts 26 is fixedly connected on the second fixing rod 5, and the two second connecting shafts 26 are respectively positioned on the same vertical plane with the first connecting shafts 7;
the two second connecting shafts 26 are internally provided with connecting sleeves 25, the pulling shaft 19 penetrates through the two connecting sleeves 25, the right end of the pulling shaft 19 is connected with the steel needle 3, the left end of the pulling shaft 19 is fixedly connected with a sliding rod 16, the sliding rod 16 is slidably clamped with a sliding hammer 17, one side of the sliding hammer 17 is rotatably connected with a pulling shaft 18, the steel needle 3 is provided with a clamping groove 32, one end of the pulling shaft 19, which is close to the steel needle 3, is fixedly connected with a clamping body 34, the clamping body 34 is inserted into the clamping groove 32, a clamping mechanism is arranged in the clamping body 34, and the clamping body 34 is connected with the clamping groove 32 through the clamping mechanism;
a third fixing rod 31 is fixedly connected between the two first connecting shafts 7, a sliding cavity is formed in the third fixing rod 31, the control rod 20 is connected in the sliding cavity in a sliding mode, an air bag 15 is fixedly connected to the left side of the control rod 20, a one-way circulation mechanism is installed on the sliding cavity, a fixing shaft 14 is fixedly connected to the right side of the control rod 20, an adjusting mechanism is installed at one end, far away from the control rod 20, of the fixing shaft 14, a movable groove is formed in the second fixing rod 5, the control rod 20 is connected with the movable groove in a sliding mode, a clamping shaft 22 is connected to the lower end of the control rod 20, and the control rod 20 is connected with the pulling shaft 19 through the clamping shaft 22;
wherein, fixed establishment includes a pair of connecting band 27, and equal sliding connection is a pair of telescopic shaft 28 on two connecting bands 27, and telescopic shaft 28 and mount 4's inner wall fixed connection, magic subsides are all installed at the both ends of connecting band 27. The two connecting belts 27 are wound on the thighs of the patient, and the magic tapes can adjust the bonding length of the two connecting belts 27, so that the positions of the thighs are fixed, and medical staff does not need to fix the thighs of the patient specially;
wherein, the clamping mechanism comprises a pair of L-shaped shafts 36, a moving groove 29 is arranged in a clamping body 34, two L-shaped shafts 36 are both arranged in the moving groove 29, one end of each L-shaped shaft 36 is fixedly connected with a moving block 33, the two moving blocks 33 are both connected with the clamping body 34 in a sliding manner, a fourth connecting spring 35 is connected between the two L-shaped shafts 36, a limiting shaft 30 is inserted between the two L-shaped shafts 36, a third connecting spring 37 is sleeved on the limiting shaft 30, two ends of the third connecting spring 37 are respectively and fixedly connected with the L-shaped shafts 36, the other ends of the two L-shaped shafts 36 are clamped with the inner wall of the clamping groove 32, the L-shaped shafts 36 are moved through the two moving blocks 33, the fourth connecting spring 35 and the third connecting spring 37 are compressed, the limiting shaft 30 can slide relative to the L-shaped shafts 36, so that the clamping body 34 can be inserted into the clamping groove 32, the moving blocks 33 are released, under the elastic force action of the fourth connecting spring 35 and the third connecting spring 37, thereby realizing the clamping effect between the L-shaped shaft 36 and the clamping groove 32;
wherein, the third fixing rod 31 is symmetrically provided with connecting grooves 38, two ends of the limiting shaft 30 are respectively inserted into the connecting grooves 38, two ends of the limiting shaft 30 are both fixedly connected with limiting blocks, the inner wall of the connecting grooves 38 is provided with limiting grooves corresponding to the limiting blocks, the limiting blocks are connected with the limiting grooves in a sliding manner, the limiting blocks play a limiting role, and control the moving range of the limiting shaft 30 relative to the L-shaped shaft 36;
wherein, the adjusting mechanism comprises a plurality of threaded rods 11, one end of the fixed shaft 14 far away from the control rod 20 is fixedly connected with a fixed block, a pair of threaded sleeves 8 are sleeved on the threaded rods 11 in a threaded manner, two sides of the two threaded sleeves 8 are symmetrically and rotatably connected with linkage shafts 12, wherein the two linkage shafts 12 are rotatably connected with the fixed block, the other two linkage shafts 12 are rotatably connected with sliding shafts 39, the sliding shafts 39 are slidably connected with third fixed rods 31, two ends of the sliding shafts 39 are symmetrically provided with movable mechanisms, the sliding shafts 39 are connected with the third fixed rods 31 through the movable mechanisms, an opening is arranged on the first fixed rod 6, the threaded rods 11 penetrate through the opening, one end of the threaded rods 11 far away from the third fixed rods 31 is fixedly connected with a turntable 9, a handle 10 is rotatably connected on the turntable 9, a return spring is sleeved at the joint of the handle 10 and the turntable 9, a user rotates the handle 10, the threaded rods 11 are driven to rotate by the turntable 9, the threaded rod 11 can drive the threaded sleeves 8 sleeved with the threads to synchronously approach or depart from each other in the rotating process, and the sliding shaft 39 can be fixed at a corresponding position of the third fixing rod 31 at any time through the movable mechanism, so that the included angle between the two linkage shafts 12 can be changed when the threaded rod 11 rotates, the change of the included angle can drive the control rod 20 to move, the control rod 20 drives the pulling shaft 19 to move, and the labor force of medical personnel can be greatly reduced through the adjusting device at the most labor-consuming place;
wherein, the movable mechanism comprises a second movable shaft 43, sliding grooves 45 are symmetrically arranged at two ends of the sliding shaft 39, a third sliding block 41 is fixedly connected at the center of the clamp body 34, the third sliding block 41 is in sliding connection with the sliding grooves 45, a first movable shaft 40 is connected at two ends of the second movable shaft 43 in a hinged manner, a tooth block 44 is fixedly connected at one end of the first movable shaft 40 far away from the second movable shaft 43, tooth grooves 13 are symmetrically arranged on the third fixed rod 31, the tooth block 44 is in engaged joint with the tooth grooves 13, a second connecting spring 42 is arranged in the sliding groove 45, the second connecting spring 42 is fixedly connected with the third sliding block 41, when the angle between the two linkage shafts 12 cannot be changed any more after the distance of one end is moved, the position of the sliding shaft 39 relative to the third fixed rod 31 is adjusted again, after the position is properly adjusted, the first movable shaft 40 is respectively rotated, so that the tooth block 44 connected at one end of the first movable shaft 40 is engaged with the tooth grooves 13, thereby fixing the position of the slide shaft 39 for the next adjustment;
wherein, the one-way circulation mechanism comprises a conical block 49, one side of the third fixing rod 31 is provided with a communication port, the conical block 49 is clamped on the communication port, two sides of the communication port are symmetrically and fixedly connected with inserting shafts 46, one end of the conical block 49 is fixedly connected with a second sliding block 48, the two inserting shafts 46 pass through the second sliding block 48, the inserting shafts 46 are sleeved with first connecting springs 47, one end of each first connecting spring 47 is fixedly connected with the second sliding block 48, the other end of each first connecting spring 47 is fixedly connected with the outer wall of the third fixing rod 31, when the control rod 20 moves towards the right side, the air in the air bag 15 is compressed, the air in the air bag 15 is extruded outwards, the air acts on the conical block 49, the conical block 49 pushes the second sliding block 48 to move, the second sliding block 48 slides towards the inserting shafts 46, the communication port is opened, and the air flows out, when the control rod 20 does not move any more, under the elastic force action of the first connecting spring 47, the conical block 49 is clamped and fixed with the communication port, so that the control rod 20 can be controlled not to move continuously in time, and the injury to a patient caused by the excessively fast drawing-out process is avoided;
the first sliding block 24 is connected in the movable groove in a sliding mode, one side of the first sliding block 24 is rotatably connected with a rotating block 21, a socket is formed in the control rod 20, the rotating block 21 penetrates through the socket, a return spring is sleeved at the joint of the rotating block 21 and the first sliding block 24, the rotating block 21 on one side of the first sliding block 24 penetrates through the socket in the control rod 20 and rotates a certain angle, the position of the rotating block 21 is fixed after the rotating block rotates a certain angle through the return spring, the first sliding block 24 is connected with the control rod 20, and when the control rod 20 moves, the first sliding block 24 slides relative to the movable groove, so that the sliding angle of the control rod 20 is effectively controlled, and the stability of the moving process of the control rod is guaranteed;
wherein, the upper end fixedly connected with rectangular block 23 of calorie axle 22, rectangular block 23 is inserted and is established on control lever 20, the lower extreme of calorie axle 22 with draw and get 19 joints of axle, rectangular block 23 and the control lever 20 joint through calorie axle 22 upper end, the lower extreme of calorie axle 22 inserts and draws in the axle 19, thereby realize the fixed connection of control lever 20 and drawing the axle 19, make and draw axle 19 and control lever 20 synchronous motion, thereby calorie axle 22 drives and draws the axle 19 and realize the extraction of steel needle 3, the symmetry is installed the buckle on the base 1, be provided with the operation table below the mount 4, install the catching groove that corresponds with the buckle on the operation table, buckle and catching groove joint, thereby buckle and catching groove joint, realize the fixed of sick bed and base 1, the sick bed is as basic fixed knot structure, stabilize whole equipment.
In the invention, when a user uses the device, thighs of a patient are fixed through a fixing mechanism, a fixing frame 4 is fixed on an operating bed, one end of a pulling shaft 19 is connected with a steel needle 3 through an operating clamping mechanism, a handle 10 is rotated, a rotary table 9 and a threaded rod 11 are driven to rotate through the handle 10, the change of the angle between two linkage shafts 12 is realized, the linkage shafts 12 push a control rod 20 to move through a fixed shaft 14, the control rod 20 drives the pulling shaft 19 to slowly move outwards through a clamping shaft 22, the position with relatively hard movement is realized through an adjusting mechanism, the labor force can be effectively reduced, wherein an air bag 15 is used for buffering, after the operation of the position with hard angle is finished, the sudden movement under inertia is avoided, finally, the pulling shaft 18 is pulled, the pulling shaft 18 drives a sliding hammer 17 to slowly impact the tail of a sliding rod 16 on the sliding rod 16, so that the steel needle 3 is taken out of the marrow of the patient, the independent medical care personnel can easily take out the steel needle 3.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A rotary femoral intramedullary needle extractor, which comprises a pulling shaft (19) and a fixing frame (4) sleeved on a thigh, it is characterized in that a steel needle (3) is inserted into the thigh, a fixing mechanism is arranged on the inner wall of the fixing frame (4), the bottom of the fixed frame (4) is connected with a base (1), the base (1) is fixedly connected with connecting blocks (2), the two connecting blocks (2) are respectively inserted on the fixed frame (4), one side of the fixed frame (4) is fixedly connected with a first fixed rod (6) and a second fixed rod (5), a pair of first connecting shafts (7) is fixedly connected between the first fixing rod (6) and the second fixing rod (5), a pair of second connecting shafts (26) is fixedly connected to the second fixing rod (5), and the two second connecting shafts (26) are respectively positioned on the same vertical plane with the first connecting shaft (7);
connecting sleeves (25) are installed in the two second connecting shafts (26), the pulling shaft (19) penetrates through the two connecting sleeves (25), the right end of the pulling shaft (19) is connected with the steel needle (3), a sliding rod (16) is fixedly connected with the left end of the pulling shaft (19), a sliding hammer (17) is connected onto the sliding rod (16) in a sliding and clamping mode, one side of the sliding hammer (17) is connected with the pulling shaft (18) in a rotating mode, a clamping groove (32) is formed in the steel needle (3), a clamping body (34) is fixedly connected to one end, close to the steel needle (3), of the pulling shaft (19), the clamping body (34) is inserted into the clamping groove (32), a clamping mechanism is installed in the clamping body (34), and the clamping body (34) is connected with the clamping groove (32) through the clamping mechanism;
a third fixing rod (31) is fixedly connected between the two first connecting shafts (7), a sliding cavity is formed in the third fixing rod (31), a control rod (20) is connected in the sliding cavity in a sliding mode, an air bag (15) is fixedly connected to the left side of the control rod (20), a one-way circulation mechanism is installed on the sliding cavity, a fixing shaft (14) is fixedly connected to the right side of the control rod (20), an adjusting mechanism is installed at one end, far away from the control rod (20), of the fixing shaft (14), a movable groove is formed in the second fixing rod (5), the control rod (20) is connected with the movable groove in a sliding mode, a clamping shaft (22) is connected to the lower end of the control rod (20), and the control rod (20) is connected with a pulling shaft (19) through the clamping shaft (22);
the adjusting mechanism comprises a plurality of threaded rods (11), one end of the fixed shaft (14) far away from the control rod (20) is fixedly connected with a fixed block, a pair of threaded sleeves (8) are sleeved on the threaded rods (11) in a threaded manner, two sides of each threaded sleeve (8) are symmetrically and rotatably connected with a linkage shaft (12), two linkage shafts (12) are rotatably connected with the fixed block, the other two linkage shafts (12) are rotatably connected with sliding shafts (39), the sliding shafts (39) are slidably connected with a third fixed rod (31), movable mechanisms are symmetrically arranged at two ends of each sliding shaft (39), the sliding shafts (39) are connected with the third fixed rod (31) through the movable mechanisms, an opening is formed in the first fixed rod (6), the threaded rods (11) penetrate through the opening, one end of the threaded rods (11) far away from the third fixed rod (31) is fixedly connected with a turntable (9), the rotary table is characterized in that a handle (10) is rotatably connected to the rotary table (9), and a return spring is sleeved at the joint of the handle (10) and the rotary table (9).
2. The rotary type femoral intramedullary nail extractor according to claim 1, wherein the fixing mechanism comprises a pair of connecting bands (27), a pair of telescopic shafts (28) are slidably connected to both of the two connecting bands (27), the telescopic shafts (28) are fixedly connected with the inner wall of the fixing frame (4), and magic tapes are mounted at both ends of the connecting bands (27).
3. The rotary femoral intramedullary needle extractor of claim 1, the clamping mechanism comprises a pair of L-shaped shafts (36), a moving groove (29) is arranged in the clamping body (34), the two L-shaped shafts (36) are both arranged in the moving groove (29), one end of each L-shaped shaft (36) is fixedly connected with a moving block (33), the two moving blocks (33) are both connected with a clamping body (34) in a sliding manner, a fourth connecting spring (35) is connected between the two L-shaped shafts (36), a limiting shaft (30) is inserted between the two L-shaped shafts (36), spacing epaxial cup jointed third connecting spring (37) of (30), the both ends of third connecting spring (37) respectively with L type axle (36) fixed connection, two the other end of L type axle (36) and the inner wall joint of draw-in groove (32).
4. The rotary femoral intramedullary nail extractor according to claim 3, wherein the third fixing rod (31) is symmetrically provided with a connecting groove (38), two ends of the limiting shaft (30) are respectively inserted into the connecting groove (38), two ends of the limiting shaft (30) are both fixedly connected with limiting blocks, an inner wall of the connecting groove (38) is provided with a limiting groove corresponding to the limiting block, and the limiting block is slidably connected with the limiting groove.
5. The rotary femoral intramedullary needle extractor of claim 1, the movable mechanism comprises a second movable shaft (43), sliding grooves (45) are symmetrically formed in two ends of the sliding shaft (39), the center of the clamp body (34) is fixedly connected with a third sliding block (41), the third sliding block (41) is connected with a sliding groove (45) in a sliding way, the two ends of the second movable shaft (43) are connected with a first movable shaft (40) through hinges, one end of the first movable shaft (40) far away from the second movable shaft (43) is fixedly connected with a tooth block (44), tooth sockets (13) are symmetrically arranged on the third fixing rod (31), the tooth blocks (44) are engaged and clamped with the tooth sockets (13), a second connecting spring (42) is installed in the sliding groove (45), and the second connecting spring (42) is fixedly connected with a third sliding block (41).
6. The rotary femoral intramedullary nail extractor according to claim 1, wherein the one-way circulating mechanism comprises a conical block (49), one side of the third fixing rod (31) is provided with a communication port, the conical block (49) is clamped on the communication port, insertion shafts (46) are symmetrically and fixedly connected to two sides of the communication port, one end of the conical block (49) is fixedly connected with a second slider (48), two insertion shafts (46) penetrate through the second slider (48), a first connecting spring (47) is sleeved on each insertion shaft (46), one end of the first connecting spring (47) is fixedly connected with the second slider (48), and the other end of the first connecting spring (47) is fixedly connected with the outer wall of the third fixing rod (31).
7. The rotary type femoral intramedullary nail extractor according to claim 1, wherein a first sliding block (24) is slidably connected in the movable groove, a rotating block (21) is rotatably connected to one side of the first sliding block (24), a socket is formed on the control rod (20), the rotating block (21) passes through the socket, and a return spring is sleeved at the joint of the rotating block (21) and the first sliding block (24).
8. The rotary type femoral intramedullary nail extractor according to claim 1, wherein a rectangular block (23) is fixedly connected to the upper end of the clamping shaft (22), the rectangular block (23) is inserted on the control rod (20), and the lower end of the clamping shaft (22) is clamped with the pulling shaft (19).
9. The rotary femoral intramedullary needle extractor according to claim 1, wherein the base (1) is symmetrically provided with buckles, an operating bed is arranged below the fixing frame (4), the operating bed is provided with buckle grooves corresponding to the buckles, and the buckles are connected with the buckle grooves in a clamping manner.
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| WO2003086214A1 (en) * | 2002-04-09 | 2003-10-23 | Henrik Hansson | Device for extraction of pins at fixation means for fixation of bone fragments at bone fractures |
| CN201295286Y (en) * | 2008-10-21 | 2009-08-26 | 常州迪恩医疗器械有限公司 | Three-in-one aiming device for femoral intramedullary nail |
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