Counterweight-free traction device for limb recovery in medical surgery department

Abstract

The invention discloses a medical surgical limb recovery traction device without a counter weight, and belongs to the field of medical auxiliary tools, the medical surgical limb recovery traction device comprises a sickbed, a human body model, a traction device and a traction rope, the traction device comprises a fixing plate connected with the sickbed, and the outer wall of the fixing plate is fixedly connected with a retaining structure for pulling the traction rope. When the leg bone traction device is used, the leg bone of a patient moves along with continuous traction, the pressure balance in the upper cavity and the lower cavity is broken, the pressure hose in the upper cavity further extends, and when the pressure hose in the upper cavity extends, the pressure block is pushed to extrude the lower pressure hose; and when the pressure hose in the lower cavity is extruded, internal gas is pushed into the supporting rod, so that the supporting rod always keeps pushing force until the internal pressure of the upper cavity and the internal pressure of the lower cavity are balanced again, in this way, the traction pulling force can be automatically adjusted, manual operation is not needed, and the convenience of the device is further improved.

Description

Technical Field

[0001] The present invention relates to the field of medical auxiliary tools, and specifically to a traction device for limb recovery in medical surgery without counterweights. Background Art

[0002] Orthopedic traction is a commonly used treatment technique, mainly used for the treatment and rehabilitation of fractures, dislocations or certain musculoskeletal diseases. Its main purposes include the following aspects. By applying traction force, the displaced fracture ends can be realigned to restore the normal anatomical structure of the bone. For joint dislocations, traction helps to restore the dislocated joint to its normal position. By traction, the muscle tension and spasm caused by fractures or dislocations can be reduced, thus relieving pain. Appropriate traction can improve local blood circulation, which is beneficial to the blood supply and nutrition of the fracture ends and promotes fracture healing.

[0003] However, the current traction devices have simple structures, mostly composed of traction ropes and multiple counterweight blocks. It is very inconvenient to carry multiple counterweight blocks into the ward during operation. During traction, the counterweight blocks hang at the end of the hospital bed. There are situations where caregivers and medical staff walk in the ward. The counterweight blocks are very easy to be touched inadvertently. Since the counterweight blocks just hang at the end of the bed, it is very easy for the counterweight blocks to shake when being accidentally touched. When the counterweight blocks shake, it will seriously affect the traction effect and increase the pain of the patient. It is also very inconvenient to manually change the weight of the counterweight blocks according to the recovery situation during traction. Therefore, the present invention provides a traction device for limb recovery in medical surgery without counterweights to solve the above-mentioned problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a traction device for limb recovery in medical surgery without counterweights to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A traction device for limb recovery in medical surgery without counterweights, including a hospital bed, a human model, a traction device and a traction rope. The traction device includes a fixing plate connected to the hospital bed. A holding structure for pulling the traction rope is fixedly connected to the outer wall of the fixing plate. And a tension providing structure is also fixedly connected between the holding structure and the fixing plate. The holding structure includes a connecting plate, and the connecting plate is fixedly connected to the fixing plate through a connecting member. An adjusting rod for supporting and guiding the traction rope is also fixedly connected between the tension providing structure and the fixing plate; One end of the connecting plate away from the fixed plate is rotatably connected with a tension plate. The upper end of the tension plate is connected with one end of the traction rope away from the patient's leg. Two support rods are symmetrically and rotatably connected between the tension plate and the connecting plate. The support rods are pneumatic piston rods. The chambers of the pneumatic piston rods are communicated with a tension providing structure through a butt joint pipe. A limiting structure is also rotatably connected between the connecting plate and the support rods, so that the tension plate can maintain one-way rotation through the limiting structure.

[0006] As a further scheme of the present invention, the tension providing structure includes a tension pipe. The upper end of the tension pipe is fixedly connected with a holding pipe. The lower end of the tension pipe is fixedly connected with a pneumatic pipe. A piston block for providing pressure to the pneumatic pipe is slidably connected inside the tension pipe. The upper end of the piston block is fixedly connected with a power piston rod. The power piston rod sequentially penetrates through the tension pipe and the holding pipe. By continuously pressing the power piston rod, the pressure in the air chamber inside the tension pipe can be increased.

[0007] As a further scheme of the present invention, an exhaust passage is opened inside the power piston rod. The exhaust passage penetrates through the piston block and the entire power piston rod, and a first one-way valve is also fixedly connected inside the exhaust passage.

[0008] As a further scheme of the present invention, two transition passages are symmetrically and fixedly connected to the inner bottom end of the tension pipe. Second one-way valves are fixedly connected inside the two transition passages. Both of the two second one-way valves only allow the gas inside the tension pipe to be discharged into the pneumatic pipe. The first one-way valve and the two second one-way valves are all one-way pressure relief valves. The pressure bearing capacity of one of the second one-way valves is greater than that of the first one-way valve which is greater than that of the other second one-way valve.

[0009] As a further scheme of the present invention, a limiting slide bar is fixedly connected inside the pneumatic pipe. A pressure block is slidably connected to the outside of the limiting slide bar. The pressure block divides the entire pneumatic pipe into upper and lower two cavities. A connecting pipe is provided inside the lower cavity.

[0010] As a further scheme of the present invention, the connecting pipe is connected with a diversion air pipe on the outer wall of the pneumatic pipe, and the diversion air pipe is fixedly connected with the butt joint pipe. Pressure hoses are fixedly connected inside the upper and lower two cavities. The ends of the two pressure hoses away from each other are in an open state and are fixedly connected with the inner wall of the pneumatic pipe. The other ends are both fixedly connected with fixed disks, and manual pressure relief valves are fixedly connected inside the two cavities.

[0011] As a further scheme of the present invention, a diversion pipe is also fixedly connected inside the pneumatic pipe. One end of the diversion pipe is connected with one of the transition passages, and the other end sequentially penetrates through the fixed disk and the pressure block and is fixedly connected with the inner bottom end of the pneumatic pipe. An exhaust port is also opened at the lower end of the diversion pipe.

[0012] As a further solution of the present invention, restraint ropes are fixedly connected inside both of the two pressure hoses. To facilitate the length adjustment of the pressure hoses, two adjusting pipes are fixedly connected to the outside of the air pressure pipe. A guiding steel bar is movably connected inside the adjusting pipe, and the guiding steel bar is slidably connected inside the air pressure pipe. The guiding steel bar is fixedly connected to the restraint rope. By adjusting the length of the guiding steel bar extending into the air pressure pipe, the telescopic length of the pressure hose can be changed.

[0013] As a further solution of the present invention, the restraint structure includes an outer pipe. An inner pipe is fixedly connected inside the outer pipe. A limiting piston is slidably connected inside the inner pipe. A limiting plug rod is fixedly connected inside the limiting piston. The limiting plug rod is rotatably connected to the outer wall of the support rod. The outer pipe is rotatably connected to the outer wall of the connecting plate. A third one-way valve is also fixedly connected to the outer wall of the inner pipe. A connection port is also provided on the outer wall of the inner pipe. The connection port communicates the inside of the inner pipe with the inside of the outer pipe.

[0014] As a further solution of the present invention, a sealing block is movably connected inside the connection port. The outer wall of the sealing block is arc-shaped, so that the sealing block can move at a small angle inside the connection port. One end of the sealing block is fixedly connected with a soft rubber, and the other end is fixedly connected with a short rod. A gas guiding port is provided between the inside of the connection port and the inner pipe. The soft rubber blocks the gas guiding port. A number of air inlets are also opened on the outer wall of the sealing block. The short rod is rotatably connected to an adjusting inner rod at the end away from the sealing block. The adjusting inner rod is fixedly connected with a contact rod at the end away from the short rod. The contact rod penetrates through the outer wall of the connecting plate and is slidably connected with the connecting plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. When the present invention is in use, during operation, hold the holding tube and continuously press the power piston rod. Then, the pressure hoses in the upper and lower cavities expand in sequence until restricted by the restricting rope. After the pressure hose in the lower cavity is restricted by the restricting rope, the gas will enter the support rod through the diversion air pipe and the docking pipe, thereby causing the support rod to push the tension plate to tilt. When the tension plate tilts, it will pull the traction rope to stretch and traction the patient's leg. When the pressure in the lower cavity reaches the threshold, the air pumping can be stopped. At this time, the pressures in the upper and lower cavities are the same. Then, extend the guiding steel bar into the upper cavity. At this time, the pressure hose in the upper cavity has a tendency to extend again. As the traction continues, the patient's leg bone will displace. When the leg bone displaces, the air intake volume in the support rod will change. At this time, the pressure balance in the upper and lower cavities is broken, and the pressure hose in the upper cavity will further elongate. When the pressure hose in the upper cavity elongates, it will push the pressure block to squeeze the lower pressure hose. When the lower pressure hose is squeezed, the gas inside will be pushed into the support rod, thereby enabling the support rod to always maintain a thrust until the pressures in the upper and lower cavities are balanced again. In this way, the present invention can automatically adjust the traction force without manual operation, further increasing the convenience of the present invention.

[0016] 2. When the present invention is in use, when the tension plate rotates, it will pull the limit plug rod to extend outwards. At this time, the gas in the inner tube will be discharged into the outer tube through the third one-way valve. Although the pressures in the inner tube and the outer tube are the same at this time, according to the formula of pressure and force, since one end of the limit piston has a limit plug rod and the other end does not, the pressure areas received at both ends of the limit piston are different. The pressure at the end of the limit piston with the limit plug rod is smaller than that at the other end. In this way, the reverse rotation of the tension plate can be prevented from affecting the traction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a traction device for limb recovery in medical surgery without counterweight.

[0018] Figure 2 It is an exploded view of a traction device for limb recovery in medical surgery without counterweight.

[0019] Figure 3 It is a structural diagram of the holding structure in a traction device for limb recovery in medical surgery without counterweight.

[0020] Figure 4 It is a cross-sectional view of the holding structure in a traction device for limb recovery in medical surgery without counterweight.

[0021] Figure 5 It is a connection diagram of the tension plate and the connecting plate in a traction device for limb recovery in medical surgery without counterweight.

[0022] Figure 6 A cross-sectional view of the tension providing structure in a traction device for limb recovery in medical surgery without counterweight.

[0023] Figure 7 A cross-sectional view of the connecting pipe in a traction device for limb recovery in medical surgery without counterweight.

[0024] Figure 8 An internal view of the pneumatic tube in a traction device for limb recovery in medical surgery without counterweight.

[0025] Figure 9 An internal structure diagram of the limiting structure in a traction device for limb recovery in medical surgery without counterweight.

[0026] Figure 10 In a traction device for limb recovery in medical surgery without counterweight Figure 9 Large diagram of Prescription A.

[0027] Figure 11 A usage state diagram of a traction device for limb recovery in medical surgery without counterweight.

[0028] In the figure: 1, hospital bed; 2, human model; 3, traction device; 4, traction rope; 5, tension providing structure; 6, holding structure; 7, limiting structure; 300, fixing plate; 301, limiting plate; 302, positioning plate; 303, connecting piece; 304, locking bolt; 305, adjusting rod; 306, extension rod; 307, locking nut; 308, guide wheel; 309, transition window; 500, tension tube; 501, holding tube; 502, pneumatic tube; 503, reset cavity; 504, reset spring; 505, blocking plate; 506, power piston rod; 507, exhaust passage; 508, first one-way valve; 509, piston block; 510, air chamber; 511, transition passage; 512, pressure hose; 513, fixed disk; 514, limiting rope; 515, adjusting tube; 516, diversion air pipe; 517, connecting pipe; 518, pressure block; 519, limiting slide bar; 520, shunt pipe; 521, exhaust port; 523, guiding steel bar; 524, adjusting screw; 525, connecting rod; 526, guiding steel bar; 527, manual pressure relief valve; 600, connecting plate; 601, docking pipe; 602, tension plate; 603, extension plate; 604, connecting bolt; 605, first installation groove; 606, second installation groove; 607, support rod; 700. Outer tube; 702. Inner tube; 703. Limit piston; 704. Limit plug rod; 705. Third one-way valve; 706. Contact rod; 707. Adjusting inner rod; 708. Plugging block; 709. Air inlet; 710. Connection port. Detailed implementation mode

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1: Please refer to Figures 1 to 5 , in the embodiment of the present invention, a traction device for limb recovery in medical surgery without counterweight includes a hospital bed 1, a human body model 2, a traction device 3 and a traction rope 4. When stretching the patient's leg, steel nails need to be inserted into the patient's leg according to specific conditions, and then a pull ring is fixed outside the steel nails, and then the pull ring is connected to the traction rope 4 to stretch the patient's leg. The steel nails and the pull ring are both prior arts and will not be described in detail here. The traction device 3 includes a fixing plate 300 connected to the hospital bed 1. When stretching the patient's leg, the traction device 3 needs to be connected to the hospital bed 1. In order to facilitate the connection between the traction device 3 and the hospital bed 1 so that the traction device 3 can be applied to different hospital beds 1, the traction device 3 can be detachably connected to the hospital bed 1 through the fixing plate 300. Specifically, two limiting plates 301 are symmetrically and slidably connected to both the upper and lower ends of the fixing plate 300. One ends of the limiting plates 301 located inside the fixing plate 300 are fixedly connected with pulling springs, and the ends of the pulling springs away from the limiting plates 301 are fixedly connected to the fixing plate 300. A positioning plate 302 is also connected to the outer wall of the limiting plate 301 through a hexagonal bolt, and the hexagonal bolt is rotatably connected to the positioning plate 302, and the hexagonal bolt is threadedly connected to the limiting plate 301. More specifically, two optical axes are symmetrically and fixedly connected to one end of the positioning plate 302 close to the limiting plate 301, and the optical axes are slidably connected to the limiting plate 301. When in use, first rotate the hexagonal bolt to adjust the distance between the positioning plate 302 and the limiting plate 301, and then pull the limiting plates 301 in opposite directions to expand the pulling springs, and then buckle the limiting plates 301 on the upper and lower ends of the bed end guardrail, and finally tighten the hexagonal bolt to make the positioning plate 302 approach the limiting plate 301, so as to connect the fixing plate 300 to the hospital bed 1. In this way, the connection of the traction device 3 can be completed.

[0031] A holding structure 6 for pulling the towing rope 4 is fixedly connected to the outer wall of the fixed plate 300, and a tension providing structure 5 is also fixedly connected between the holding structure 6 and the fixed plate 300. The holding structure 6 includes a connecting plate 600. The connecting plate 600 is fixedly connected to the fixed plate 300 through a connecting member 303. Specifically, two connecting members 303 are fixedly connected to one end of the connecting plate 600 close to the fixed plate 300 through fixing bolts, and the two connecting members 303 are respectively detachably connected to the fixed plate 300 through locking bolts 304. An adjusting rod 305 for supporting and guiding the towing rope 4 is also fixedly connected between the tension providing structure 5 and the fixed plate 300. Specifically, the lower end of the adjusting rod 305 is fixedly connected to the outer surface of one of the connecting members 303, and a transition window 309 is opened inside the other connecting member 303. The adjusting rod 305 passes through the connecting member 303 through the transition window 309. An extension rod 306 is also slidably connected inside the adjusting rod 305. A guide wheel 308 is rotatably connected to the upper end of the extension rod 306. More specifically, a sliding window is also opened on the outer surface of the adjusting rod 305. A fastening screw is fixedly connected to the outer wall of the extension rod 306. The fastening screw extends to the outside of the sliding window, and a locking nut 307 is also threadedly connected to the outside of the fastening screw. Both the locking nut 307 and the locking screw can normally pass through the transition window 309. After both the locking nut 307 and the locking screw are above the transition window 309, the extension rod 306 can be rotated to change its angle. After the angle adjustment is completed, the locking nut 307 is tightened to fix the angle of the extension rod 306, thereby facilitating the stretching of the patient's leg.

[0032] A tension plate 602 is rotatably connected to one end of the connecting plate 600 away from the fixed plate 300. The upper end of the tension plate 602 is connected to the end of the towing rope 4 away from the patient's leg. Specifically, a receiving groove is opened at one end of the connecting plate 600 away from the fixed plate 300. The tension plate 602 is located in the receiving groove, and a rotating shaft is fixedly connected to the lower end of the tension plate 602. The rotating shaft is rotatably connected to the connecting plate 600. An extension plate 603 is fixedly connected to the upper end of the connecting plate 600. A connecting bolt 604 is threadedly connected to the upper end of the extension plate 603. A connecting hole is opened in the middle of the connecting bolt 604. The towing rope 4 passes through the connecting hole, and by rotating the connecting bolt 604, the towing rope 4 can be driven to move into the threaded hole, thereby squeezing and limiting the towing rope 4 by the connecting bolt 604 and the threaded hole.

[0033] Please refer to Figure 4 and Figure 5, there are two support rods 607 symmetrically and rotatably connected between the tension plate 602 and the connecting plate 600. The support rods 607 are pneumatic piston rods. The chambers of the pneumatic piston rods are connected to the tension providing structure 5 through the docking pipes 601, and the docking pipes 601 are flexible hoses. Specifically, a first installation groove 605 is formed inside the connecting plate 600. One end of the pneumatic piston rod is rotatably connected inside the first installation groove 605, and the movable end of the pneumatic piston rod is rotatably connected to the tension plate 602. More specifically, the pneumatic piston rod includes a cylinder body, and a connecting piston is movably connected inside the cylinder body. One end of the connecting piston is fixedly connected to the piston rod of the pneumatic piston rod; In order to maintain the stability of the tension plate 602 and prevent the tension plate 602 from rotating towards the connecting plate 600 during operation, a limiting structure 7 is also rotatably connected between the connecting plate 600 and the support rod 607. Through the limiting structure 7, the tension plate 602 can maintain one-way rotation. Specifically, a second installation groove 606 is also formed inside the connecting plate 600, and the limiting structure 7 is located inside the second installation groove 606.

[0034] Embodiment 2: Please refer to Figures 6 - 8 , based on Embodiment 1, the tension providing structure 5 includes a tension tube 500. The upper end of the tension tube 500 is fixedly connected with a holding tube 501, and the lower end of the tension tube 500 is fixedly connected with a pneumatic tube 502. A piston block 509 that provides pressure for the pneumatic tube 502 is slidably connected inside the tension tube 500. The upper end of the piston block 509 is fixedly connected with a power piston rod 506. The power piston rod 506 sequentially penetrates through the tension tube 500 and the holding tube 501. By continuously pressing the power piston rod 506, the pressure in the air chamber 510 inside the tension tube 500 can be increased. In order for gas to continuously enter the air chamber 510, a fourth one-way valve is also fixedly connected to the outside of the tension tube 500. The fourth one-way valve only allows gas to enter the tension tube 500 (the fourth one-way valve is not visible in the figure). An exhaust passage 507 is formed inside the power piston rod 506. The exhaust passage 507 penetrates through the piston block 509 and the entire power piston rod 506, and a first one-way valve 508 is also fixedly connected inside the exhaust passage 507. Specifically, the first one-way valve 508 only allows gas to be discharged outwards; Two transition channels 511 are symmetrically and fixedly connected to the inner bottom end of the tension tube 500. Second one-way valves are fixedly connected inside both of the two transition channels 511. Both of the two second one-way valves only allow the gas inside the tension tube 500 to be discharged into the pneumatic tube 502. The first one-way valve 508 and the two second one-way valves are all one-way pressure relief valves. The pressure-bearing capacity of one of the second one-way valves is greater than that of the first one-way valve 508 which is greater than that of the other second one-way valve. Specifically, the first one-way valve 508 and the two second one-way valves are numbered as E, D1, and D2 respectively. The pressure-bearing relationship is: D1>E>D2; To further increase the stability of the power piston rod 506, the outer part of the holding tube 501 is wrapped with a rubber sleeve, and a reset cavity 503 is formed inside the holding tube 501. A reset spring 504 is fixedly connected inside the reset cavity 503. The reset spring 504 is sleeved outside the power piston rod 506. A blocking plate 505 is fixedly connected to a part of the power piston rod 506 inside the holding tube 501. The blocking plate 505 is located above the reset spring 504; A limiting slide bar 519 is fixedly connected inside the air pressure tube 502. A pressure block 518 is slidably connected to the outside of the limiting slide bar 519. The pressure block 518 divides the entire air pressure tube 502 into upper and lower cavities. A connecting tube 517 is arranged inside the lower cavity. The connecting tube 517 is connected to a diversion air tube 516 on the outer wall of the air pressure tube 502. The diversion air tube 516 is fixedly connected to the docking tube 601. Pressure hoses 512 are fixedly connected inside both the upper and lower cavities. The pressure hoses 512 are corrugated hoses. One ends of the two pressure hoses 512 away from each other are in an open state and are fixedly connected to the inner wall of the air pressure tube 502. The other ends are both fixedly connected to a fixed disk 513. Manual pressure relief valves 527 are fixedly connected inside both cavities. The pressures inside the two cavities can be relieved through the manual pressure relief valves 527. Specifically, two pressure gauges are fixedly connected to the outer wall of the air pressure tube 502. The pressure gauges are respectively communicated with the upper cavity and the lower cavity. The pressure gauges are not shown in the figure; A diversion tube 520 is also fixedly connected inside the air pressure tube 502. One end of the diversion tube 520 is connected to one of the transition channels 511. The other end sequentially penetrates through the fixed disk 513 and the pressure block 518 and is fixedly connected to the bottom end inside the air pressure tube 502. An exhaust port 521 is also formed at the lower end of the diversion tube 520. Specifically, the diversion tube 520 is connected to the transition channel 511 where the D1 second one-way valve is located. More specifically, corrugated rubber tubes are sleeved outside both the limiting slide bar 519 and the diversion tube 520. Sealing rubber rings are arranged at the sliding connection parts of the pressure block 518 with the limiting slide bar 519 and the diversion tube 520. One end of the corrugated rubber tube is fixedly connected to the inner wall of the air pressure tube 502, and the other end is fixedly connected to the pressure block 518. In this way, the airtightness between the pressure block 518 and the limiting slide bar 519 and the diversion tube 520 can be further increased.

[0035] To prevent the pressure block 518 from sliding up and down when pressurizing the air pressure tube 502 and breaking the pressure balance, a restraining rope 514 is fixedly connected inside both of the two pressure hoses 512. To facilitate the length adjustment of the pressure hose 512, two adjusting tubes 515 are fixedly connected to the outside of the air pressure tube 502. A guiding steel bar 523 is movably connected inside the adjusting tube 515. The guiding steel bar 523 is slidably connected inside the air pressure tube 502. The guiding steel bar 523 is fixedly connected to the restraining rope 514. By adjusting the length of the guiding steel bar 523 extending into the air pressure tube 502, the telescopic length of the pressure hose 512 can be changed; Specifically, please refer to Figure 7 , one end of the adjusting tube 515 is rotatably connected with a threaded adjusting screw 524. The adjusting screw 524 is rotatably connected with a connecting rod 525 at one end of the adjusting tube 515. The connecting rod 525 is rotatably connected with a guiding steel bar 526 at the end far from the adjusting screw 524. The guiding steel bar 526 is fixedly connected to the guiding steel bar 523. More specifically, one end of the restraining rope 514 is fixedly connected to the fixed disk 513, and the other end is fixedly connected to the guiding steel bar 523.

[0036] For Embodiment 3, please refer to Figures 9 - 10 , the limiting structure 7 includes an outer tube 700. An inner tube 702 is fixedly connected inside the outer tube 700. One end of the inner tube 702 is fixedly connected to the inner wall of the outer tube 700, and the other end is in an open state. And the pressure inside the outer tube 700 is greater than the external atmospheric pressure. A limiting piston 703 is slidably connected inside the inner tube 702. A limiting piston rod 704 is fixedly connected inside the limiting piston 703. The limiting piston rod 704 is rotatably connected to the outer wall of the support rod 607. The outer tube 700 is rotatably connected to the outer wall of the connecting plate 600; A third one-way valve 705 is also fixedly connected to the outer wall of the inner tube 702. The third one-way valve 705 only allows the gas inside the inner tube 702 to be discharged outward, and the third one-way valve 705 is also a pressure relief valve, and the pressure can only be released when a predetermined pressure is reached. A connection port 710 is also provided on the outer wall of the inner tube 702. The connection port 710 connects the inside of the inner tube 702 with the inside of the outer tube 700; A plugging block 708 is movably connected inside the connection port 710. The outer wall of the plugging block 708 is circular arc-shaped, so that the plugging block 708 can move at a small angle inside the connection port 710. And one end of the plugging block 708 is fixedly connected with soft rubber, and the other end is fixedly connected with a short rod. A gas guiding port is provided between the inside of the connection port 710 and the inner tube 702. The soft rubber plugs the gas guiding port. And a plurality of air inlets 709 are also opened on the outer wall of the plugging block 708. The plurality of air inlets 709 are arranged in a circumferential shape on the outer wall of the plugging block 708. Such a design can prevent the plugging block 708 from affecting the intake of the air inlets 709; One end of the short rod away from the blocking block 708 is rotatably connected to an adjusting inner rod 707. One end of the adjusting inner rod 707 away from the short rod is fixedly connected to a contact rod 706. The contact rod 706 penetrates through the outer wall of the connecting plate 600 and is slidably connected to the connecting plate 600. And the contact rod 706 is made of a plastic material with toughness. A connecting spring is also sleeved outside the contact rod 706. One end of the connecting spring is fixedly connected to the contact rod 706, and the other end is fixedly connected to the connecting plate 600. The connecting spring facilitates the reset of the contact rod 706 after being pressed.

[0037] The working principle of the present invention is as follows: Please refer to Figure 11 When the present invention is used, the whole device is connected to the end of the hospital bed 1. After the connection is completed, one end of the traction rope 4 is connected to the pull ring on the patient's leg, and the other end is connected to the extension plate 603. After the connection is completed, start operating the tension providing structure 5 to control the rotation of the tension plate 602; During the operation, hold the holding tube 501 and continuously press the power piston rod 506. At this time, the exhaust passage 507 is not blocked. When the power piston rod 506 is pressed, it will continuously pump air into the air chamber 510. As the pressure in the air chamber 510 increases, one of the second one-way valves (D2) will open (it should be noted that the pressure that D1 can withstand is greater than D2, and the pressure that D2 can withstand is less than E. Therefore, when the pressure in the air chamber 510 is greater than E, the first one-way valve 508 will exhaust, so that only D2 can be opened when the exhaust passage 507 is not blocked). When it opens, compressed gas will enter the pressure hose 512 in the upper cavity. As the gas is pumped in, the pressure hose 512 will expand until it is restricted by the restraining rope 514. At this time, as the gas is continuously pumped into the pressure hose 512 in the upper cavity, the pressure will rise. When it is found through the pressure gauge that the pressure reaches the predetermined value, the pumping of air can be stopped (when performing leg traction, the traction force generally needs to be calculated according to the patient's physical condition. The specific calculation method is the prior art, and the conversion formula between pressure and force is also the prior art, so it will not be described in detail here. Therefore, as long as the predetermined pressure value is calculated, accurate pressurization can be achieved); When the pressure in the upper cavity reaches the threshold value, then block the exhaust passage 507 with your hand and then pump air again. At this time, since there is pressure in the upper cavity and no pressure in the lower cavity, even if both second one-way valves are opened, no gas will enter the upper cavity. The gas will only enter the lower cavity through the shunt pipe 520 until the pressures in the upper and lower cavities are balanced; When the compressed gas enters the lower cavity, the pressure hose 512 in the lower cavity will also expand until it is restricted by the restraint rope 514. After the pressure hose 512 in the lower cavity is restricted by the restraint rope 514, the gas will enter the support rod 607 through the diversion air pipe 516 and the docking pipe 601, thereby causing the support rod 607 to push the tension plate 602 to tilt. When the tension plate 602 tilts, it will pull the traction rope 4 to stretch and traction the patient's leg. When the pressure in the lower cavity reaches the threshold, the air pumping can be stopped. At this time, the pressures in the upper and lower cavities are the same (the pressure thresholds of the upper and lower cavities are the same). Then, rotate the adjusting screw rod 524 corresponding to the upper cavity to make the guiding steel bar 523 extend into the upper cavity. At this time, the pressure hose 512 in the upper cavity can be extended again. However, since the pressures in the upper and lower cavities are currently balanced, the pressure hose 512 in the upper cavity will not change; As the traction continues, the patient's leg bone will displace. When the leg bone displaces, the air intake volume in the support rod 607 will change (the support rod 607 will elongate). At this time, the pressure balance in the upper and lower cavities is broken. At this time, the pressure hose 512 in the upper cavity will further elongate. When the pressure hose 512 in the upper cavity elongates, it will push the pressure block 518 to squeeze the lower pressure hose 512. When the pressure hose 512 in the lower cavity is squeezed, the gas inside will be pushed into the support rod 607, thereby enabling the support rod 607 to always maintain a thrust until the pressures inside the upper and lower cavities are balanced again. In this way, the present invention can automatically adjust the traction force without manual operation, further increasing the convenience of the present invention.

[0038] Moreover, by adjusting the extension amount of the guiding steel bar 523 in the upper cavity, the change amount of the pressure block 518 pushing the pressure hose 512 in the lower cavity can be controlled, thereby controlling the rotation amount of the tension plate 602, and further controlling the change amount of the traction force of the traction rope 4, avoiding the problem of excessive displacement of the leg bone caused by too large a change in the traction force change amount in a short time.

[0039] Then, take a new X-ray of the patient after a period of time and then judge whether it is necessary to increase the pressure, that is, whether it is necessary to increase the traction force. If it is necessary to pressurize again, it can be done.

[0040] When the tension plate 602 rotates, it will pull the limit plug rod 704 to extend outwards. At this time, the gas in the inner tube 702 will be discharged into the outer tube 700 through the third one-way valve 705. At this time, although the pressures in the inner tube 702 and the outer tube 700 are the same, according to the formula of pressure and force, since one end of the limit piston 703 has the limit plug rod 704 and the other end does not, the pressure areas received at both ends of the limit piston 703 are different. The pressure at the end of the limit piston 703 with the limit plug rod 704 is smaller than that at the other end. In this way, the reverse rotation of the tension plate 602 can be avoided from affecting the traction effect, thereby increasing the stability of the traction.

[0041] When it is necessary to reset the tension plate 602, only need to push the contact rod 706, use the contact rod 706 to push the adjusting inner rod 707. When the adjusting inner rod 707 is pushed, the blocking block 708 will deflect, thereby releasing the blockage of the connection port 710, so that the pressure between the inner tube 702 and the outer tube 700 returns to balance again (at the beginning, the limit plug rod 704 is pulled by an external force, so the limit piston 703 will further compress the gas in the inner cylinder 702, thus opening the third one-way valve 705, and when the gas in the outer tube 700 enters the inner tube 702 through the connection port 710, there is no pressure, so the third one-way valve 705 cannot be opened). Then open the manual pressure relief valve 527, and finally manually push the tension plate 602 to reset.

[0042] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. A traction device for limb recovery in medical surgery without counterweight, comprising a hospital bed (1), a human body model (2), a traction device (3) and a traction rope (4), characterized in that, The traction device (3) includes a fixing plate (300) connected to the hospital bed (1). A holding structure (6) for pulling the traction rope (4) is fixedly connected to the outer wall of the fixing plate (300). A tension providing structure (5) is also fixedly connected between the holding structure (6) and the fixing plate (300). The holding structure (6) includes a connecting plate (600). The connecting plate (600) is fixedly connected to the fixing plate (300) through a connecting member (303). An adjusting rod (305) for supporting and guiding the traction rope (4) is also fixedly connected between the tension providing structure (5) and the fixing plate (300). One end of the connecting plate (600) away from the fixing plate (300) is rotatably connected to a tension plate (602). The upper end of the tension plate (602) is connected to the end of the traction rope (4) away from the patient's leg. Two support rods (607) are symmetrically and rotatably connected between the tension plate (602) and the connecting plate (600). The support rods (607) are pneumatic piston rods. The chambers of the pneumatic piston rods are communicated with the tension providing structure (5) through a docking pipe (601). A limiting structure (7) is also rotatably connected between the connecting plate (600) and the support rods (607), so that the tension plate (602) can maintain one-way rotation through the limiting structure (7).

2. A traction device for limb recovery in medical surgery without counterweight according to claim 1, characterized in that, The tension providing structure (5) includes a tension pipe (500). The upper end of the tension pipe (500) is fixedly connected to a holding pipe (501). The lower end of the tension pipe (500) is fixedly connected to a pneumatic pipe (502). A piston block (509) for providing pressure to the pneumatic pipe (502) is slidably connected inside the tension pipe (500). The upper end of the piston block (509) is fixedly connected to a power piston rod (506). The power piston rod (506) sequentially penetrates the tension pipe (500) and the holding pipe (501). By continuously pressing the power piston rod (506), the pressure in the air chamber (510) inside the tension pipe (500) can be increased.

3. A traction device for limb recovery in medical surgery without counterweight according to claim 2, characterized in that, An exhaust passage (507) is opened inside the power piston rod (506). The exhaust passage (507) penetrates the piston block (509) and the entire power piston rod (506). A first one-way valve (508) is also fixedly connected inside the exhaust passage (507).

4. A traction device for limb recovery in medical surgery without counterweight according to claim 3, characterized in that, Two transition passages (511) are symmetrically and fixedly connected to the bottom end inside the tension pipe (500). Second one-way valves are fixedly connected inside both of the two transition passages (511). Both of the two second one-way valves only allow the gas inside the tension pipe (500) to be discharged into the pneumatic pipe (502). The first one-way valve (508) and the two second one-way valves are all one-way pressure relief valves. The pressure-bearing capacity of one of the second one-way valves is greater than that of the first one-way valve (508), which is greater than that of the other second one-way valve.

5. A traction device for limb recovery in medical surgery without counterweight according to claim 4, characterized in that, A limiting slide bar (519) is fixedly connected inside the air pressure pipe (502). A pressure block (518) is slidably connected to the outside of the limiting slide bar (519). The pressure block (518) divides the entire air pressure pipe (502) into upper and lower cavities. A connecting pipe (517) is provided inside the lower cavity.

6. A traction device for limb recovery in medical surgery without counterweight according to claim 5, characterized in that, The connecting pipe (517) is connected to a diversion air pipe (516) on the outer wall of the air pressure pipe (502), and the diversion air pipe (516) is fixedly connected to a docking pipe (601). Pressure hoses (512) are fixedly connected inside both the upper and lower cavities. One end of each of the two pressure hoses (512) facing away from each other is in an open state and is fixedly connected to the inner wall of the air pressure pipe (502). The other ends are both fixedly connected to fixed disks (513). Manual pressure relief valves (527) are fixedly connected inside both cavities.

7. A traction device for limb recovery in medical surgery without counterweight according to claim 6, characterized in that, A flow dividing pipe (520) is also fixedly connected inside the air pressure pipe (502). One end of the flow dividing pipe (520) is connected to one of the transition channels (511), and the other end sequentially penetrates through the fixed disk (513) and the pressure block (518) and is fixedly connected to the inner bottom end of the air pressure pipe (502). An exhaust port (521) is also provided at the lower end of the flow dividing pipe (520).

8. A traction device for limb recovery in medical surgery without counterweight according to claim 7, characterized in that, Limiting ropes (514) are fixedly connected inside both of the two pressure hoses (512). To facilitate length adjustment of the pressure hoses (512), two adjusting pipes (515) are fixedly connected to the outside of the air pressure pipe (502). A guiding steel bar (523) is movably connected inside the adjusting pipe (515). The guiding steel bar (523) is slidably connected inside the air pressure pipe (502). The guiding steel bar (523) is fixedly connected to the limiting rope (514). By adjusting the length of the guiding steel bar (523) extending into the air pressure pipe (502), the telescopic length of the pressure hose (512) can be changed.

9. A traction device for limb recovery in medical surgery without counterweight according to claim 1, characterized in that, The limiting structure (7) includes an outer pipe (700). An inner pipe (702) is fixedly connected inside the outer pipe (700). A limiting piston (703) is slidably connected inside the inner pipe (702). A limiting piston rod (704) is fixedly connected inside the limiting piston (703). The limiting piston rod (704) is rotatably connected to the outer wall of the support rod (607). The outer pipe (700) is rotatably connected to the outer wall of the connecting plate (600). A third one-way valve (705) is also fixedly connected to the outer wall of the inner pipe (702). A connection port (710) is also provided on the outer wall of the inner pipe (702). The connection port (710) communicates the inside of the inner pipe (702) with the inside of the outer pipe (700).

10. A traction device for limb recovery in medical surgery without counterweight according to claim 9, characterized in that, Inside the connection port (710), a blocking block (708) is movably connected. The outer wall of the blocking block (708) is arc-shaped, enabling the blocking block (708) to move at a small angle within the connection port (710). One end of the blocking block (708) is fixedly connected to soft rubber, and the other end is fixedly connected to a short rod. A gas guide port is provided between the inside of the connection port (710) and the inner tube (702). The soft rubber blocks the gas guide port. Additionally, a number of air inlets (709) are formed on the outer wall of the blocking block (708). The end of the short rod away from the blocking block (708) is rotatably connected to an adjusting inner rod (707). The end of the adjusting inner rod (707) away from the short rod is fixedly connected to a contact rod (706). The contact rod (706) penetrates through the outer wall of the connecting plate (600) and is slidably connected to the connecting plate (600).

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