Surgical retractor for hepatobiliary and pancreatic surgery

Abstract

The invention discloses an operation drag hook for hepatobiliary and pancreatic surgery, and belongs to the field of medical instruments, the operation drag hook comprises a supporting ring and supporting seats, the supporting seats are located at the front and rear positions of the supporting ring, constant-force pulling assemblies are arranged on the two sides of the supporting ring, and each constant-force pulling assembly comprises supporting blocks fixedly connected to the two sides of the supporting ring; the inner wall of the upper end of the supporting block is slidably connected with a T-shaped limiting block, the lower end of the T-shaped limiting block is fixedly connected with a rack, force can be kept constant when the drag hooks on the two sides open an incision through the characteristics of a coil spring, secondary damage caused by the fact that the incision is pulled due to the fact that the force is too large is avoided, and meanwhile the situation that an operation is affected due to the fact that the force is too small is avoided; when the force of the coil spring is constant and the incision position is pulled by the drag hook, medical staff does not need to manually pull the rack, so that a patient is protected from secondary injury, the wound can be automatically pulled open, a worker does not need to adjust the drag hook, and the working convenience and safety are improved.

Description

Technical Field

[0001] The present invention relates to the field of medical instruments, and more particularly to a surgical retractor for hepatobiliary and pancreatic surgery. Background Art

[0002] Surgical retractors are commonly used in medical surgery, used to retract the surgical incision to fully expose the field of view suitable for surgery. The liver, gallbladder, and pancreas are important organs located on both sides of the upper abdomen, and clinical surgical treatment requires incision on one side.

[0003] When the existing surgical retractor is used to open the incision, the staff places the retractor at the incision position and controls the opening of the incision. When opening, the opening force cannot be well controlled. If it is too large, it will cause secondary damage to the patient, and if it is too small, it will affect the field of vision and be detrimental to the surgical work. At the same time, after the incision is opened, the position of the existing device cannot be adjusted. After the incision is opened, the support device may have a certain obstruction, affecting the surgery. If the support component is adjusted at this time, the pulling force of the retractor on the incision will be changed, which will affect the incision. The applicability is poor and the use has certain limitations.

[0004] Therefore, a surgical retractor for hepatobiliary and pancreatic surgery is proposed. Summary of the Invention

[0005] In response to the problems existing in the prior art, the purpose of the present invention is to provide a surgical retractor for hepatobiliary and pancreatic surgery, which can maintain a constant pulling force on the incision. Even when the position of the device is adjusted, the pulling force of the retractor will not change, thereby improving the convenience and safety of work.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A surgical retractor for hepatobiliary and pancreatic surgery comprises a support ring and a support seat, wherein the support seat is located in front and rear positions of the support ring, and constant force pulling components are provided on both sides of the support ring; The constant force pulling assembly includes support blocks fixedly connected to both sides of the support ring, the upper inner wall of the support block is slidably connected to a T limit block, the lower end of the T limit block is fixedly connected to a rack, the internal rotation of the support block is connected to a toothed roller, the outer side of the toothed roller is meshed with the lower end of the rack, and the opposite sides of the two racks are fixedly connected to a draw hook, the front end of the toothed roller is fixedly connected to a rod, the outer side of the rod is fixedly connected to a coil spring, the outer side of the coil spring is fixedly connected to a support cylinder, the rear end of the support cylinder is movably connected to the support block, the front and rear positions of the support ring are fixedly connected to the support rod, the upper end of the support seat is provided with a first slide groove, the first slide groove is slidably connected to the first slider, the upper end of the first slider is fixedly connected to the lower end of the support rod, and a limit assembly is provided on one side of the first slider Preferably, the outer side of the support tube is slidably connected to a polygonal block, the front end of the polygonal block is located inside the support tube and is fixedly connected to a first spring, the front end of the polygonal block is fixedly connected to a hand-turning rod, the rear end of the support tube is rotatably connected to the front end of the support block, and the polygonal block is clamped with the front end of the support block.

[0008] Preferably, the limiting assembly includes a first threaded rod threadedly connected to the inside of the first slider, and rectangular openings are provided on opposite sides of the two support seats. The rod wall of the first threaded rod is provided with a second spring, and the rod wall of the first threaded rod is provided with a contact block. The contact block can move back and forth on the rod wall of the first threaded rod, and one end of the first threaded rod is fixedly connected to a knob, and the knob contacts the second spring to limit the second spring.

[0009] Preferably, the upper end of the support block is fixedly connected to an air cylinder, the interior of the air cylinder is slidably connected to a first piston block, one side of the first piston block is fixedly connected to a round block, and the round blocks are provided in multiples, one side of the round block is fixedly connected to a first pipe fitting, the interior of the first pipe fitting is fixedly connected to a first one-way valve, the opposite sides of the two first pipe fittings are fixedly connected to a shell, the lower end of the shell is fixedly connected to the upper end of the rack, the opposite sides of the two air cylinders are fixedly connected to a second one-way valve, the opposite sides of the two shells are fixedly connected to a second pipe fitting, and the lower end of the pull hook is provided with a suction port, which is communicated with the second pipe fitting.

[0010] Preferably, a handle is fixedly connected to the front end of the shell.

[0011] Preferably, a dirt collection box is slidably connected to the interior of the housing.

[0012] Preferably, the interior of the pull hook is rotatably connected to a toggle block, a rectangular groove is provided inside the toggle block, a moving block is slidably connected inside the rectangular groove, the moving block can be inside the toggle block, the upper end of the moving block is rotatably connected to a second threaded rod, and the rod wall of the second threaded rod is connected to the internal thread of the rack.

[0013] Preferably, the lower end of the toggle block is fixedly connected to a suction cup, the upper end of the suction cup is fixedly connected to a hose, the upper end of the rack is fixedly connected to a cylinder, the lower end side wall of the cylinder is connected to the hose, the interior of the cylinder is slidably connected to a second piston block, the upper end of the second piston block is fixedly connected to a telescopic rod, the interior of the telescopic rod is fixedly connected to a third spring, the rod wall of the telescopic rod is slidably connected to the upper end of the cylinder, the upper end of the telescopic rod is rotatably connected to a limiting bar, and the front and rear positions of the upper end of the cylinder are fixedly connected to support plates.

[0014] Preferably, the lower end of the support ring is rotatably connected to a circular ring, the front end of the support block is evenly fixedly connected to a clamping block, the upper end of the support rod at the front end is provided with a second sliding groove, the interior of the second sliding groove is slidingly connected to a second slider, the front end of the second slider is fixedly connected to a fourth spring, the rear end of the second slider is fixedly connected to a limiting rod, the interior of the second sliding groove is fixedly connected to a sliding rod, and the sliding rod is slidably connected to the interior of the second slider.

[0015] Preferably, the lower end of the support seat is fixedly connected to an electric rod, the lower end of the electric rod is fixedly connected to a mounting seat, both sides of the upper end of the mounting seat are fixedly connected to vertical rods, and the rod walls of the vertical rods are slidably connected to both sides of the support seat.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) Due to the characteristics of the coil spring, the force of the retractors on both sides is kept constant when the incision is opened. Excessive force will not cause the incision to be pulled and cause secondary damage, and at the same time, it will not be too small to affect the operation. When the coil spring force is constant, the medical staff only needs to pull the retractor to the incision position, and there is no need to manually pull the rack. This protects the patient from secondary damage and can automatically open the wound without the need for the staff to adjust the retractor. If the retractor moves when the incision is opened, if the support ring blocks the operation, the support ring is adjusted to move. Due to the characteristics of the coil spring, when it moves, the rack moves relative to the support block, and it will not change the pulling force of the retractor on the incision, and will not cause harm to the patient, thereby improving the convenience and safety of the work.

[0017] (2) Before making the incision, the staff can adjust the elastic force of the coil spring by pulling and rotating the polygonal block according to the conditions of different patients, so as to adapt to different patients, thereby improving the applicability of the device.

[0018] (3) When the incision is opened by the retractor, negative pressure can be generated through the first piston block and the air cylinder to absorb the accumulated fluid and blood at the incision position, so that the doctor's vision is better and it is conducive to the progress of the operation.

[0019] (4) For some positions that are not affected or are not on the same level as the retractor, the second threaded rod is rotated to rotate the toggle block, which further performs a limiting effect to prevent other positions from affecting the operation, further improving the device and improving the use effect.

[0020] (5) By pulling the telescopic rod upward, the telescopic rod drives the second piston block to move upward, so that the position of the cylinder at the lower end of the second piston block is in a negative pressure state, and then the suction cup adsorbs the part to be opened, thereby improving the stability of the opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the local structure of the present invention; Figure 3 It is a partial cross-sectional schematic diagram of the present invention; Figure 4 This is a schematic cross-sectional structural diagram of a support block according to the present invention; Figure 5 For the present invention Figure 4 A in the middle is an enlarged structural diagram; Figure 6 This is a schematic cross-sectional view of the drag hook of the present invention; Figure 7 For the present invention Figure 6 The enlarged structural diagram at B in the middle; Figure 8 This is a schematic diagram of the support ring and the circular ring rotation structure of the present invention; Figure 9 For the present invention Figure 8 Enlarged structural diagram at point C in the middle.

[0022] Description of the numbers in the figure: 1. Support ring; 2. Support block; 3. T-stop block; 4. Rack; 5. Air cylinder; 6. Clamping block; 7. Stop rod; 8. Support rod; 9. Electric rod; 10. Mounting seat; 11. Vertical rod; 12. First slider; 13. Support seat; 14. Draw hook; 15. Toggle block; 16. Housing; 17. Handle; 18. Support cylinder; 19. Hand-turning rod; 20. Polygonal block; 21. Tooth roller; 22. First spring; 23. Second threaded rod; 24. Moving block; 25. Rectangular groove; 26. Cylinder; 27. Third spring; 28. Telescopic rod 29. Second piston block; 30. Second pipe fitting; 31. First pipe fitting; 32. First one-way valve; 33. Second one-way valve; 34. Dirt collection box; 35. Suction cup; 36. Hose; 37. Suction port; 38. Support plate; 39. Circular ring; 40. Second slider; 41. First slide groove; 42. Fourth spring; 43. Sliding rod; 44. First threaded rod; 45. Contact block; 46. Second spring; 47. Rectangular opening; 48. Second slide groove; 49. Rod; 50. Coil spring; 51. First piston block; 52. Circular block; 53. Limiting strip. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only 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 ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] See also Figures 1 to 9 A surgical retractor for hepatobiliary and pancreatic surgery includes a support ring 1 and a support seat 13. The support seat 13 is located in the front and rear positions of the support ring 1. The support seat 13 is used for supporting. Constant force pulling components are provided on both sides of the support ring 1. The constant force pulling assembly includes a support block 2 fixedly connected to both sides of the support ring 1, and a T-limit block 3 is slidably connected to the inner wall of the upper end of the support block 2. The T-limit block 3 can stably move at the upper end of the inner part of the support block 2, and the lower end of the T-limit block 3 is fixedly connected to the rack 4. The rack 4 can be stably moved by the T-limit block 3. The internal rotation of the support block 2 is connected to a toothed roller 21. When the toothed roller 21 rotates, it can drive the rack 4 to move. The outer side of the toothed roller 21 is meshed with the lower end of the rack 4. The opposite sides of the two racks 4 are fixedly connected to a hook 14. When the rack 4 moves, it drives the hook 14 to move. The front end of the toothed roller 21 is fixedly connected to a rod 49. The rotation of the rod 49 drives the toothed roller 21 to rotate. The outer side of the rod 49 is fixedly connected to a coil spring 50. The coil spring 50 is a prior art and is arranged in a winding manner. After the position of its end moves a certain distance, the deformation amount is almost zero. The support rod 8 is fixedly connected to the outer side of the coil spring 50, and the rear end of the support tube 18 is movably connected to the support block 2. The front and rear positions of the support ring 1 are fixedly connected to the support rod 8. The upper end of the support seat 13 is provided with a first slide groove 41. The first slide block 12 is slidably connected inside the first slide groove 41. The first slide block 12 can move inside the first slide groove 41. The upper end of the first slide block 12 is fixedly connected to the lower end of the support rod 8. A limiting component is provided on one side of the first slide block 12. After the first slide block 12 moves, the limiting component limits and fixes the first slide block 12. During operation, the two racks 4 are pulled and moved closer to each other, and the two retractors 14 are hooked to the incision position of the operation, and then the corresponding racks 4 are released. At this time, the rod 49 rotates under the action of the coil spring 50, and the coil spring 50 causes the tooth roller 21 to rotate, and the rotation of the tooth roller 21 causes the rack 4 to move. Since the coil spring 50 can provide a constant force, the force of the rod 49 to rotate remains unchanged, and the rod 49 drives the tooth roller 21 to rotate, and the rotation of the tooth roller 21 causes the rack 4 to drive the retractor 14 to move. The two retractors 14 provide a constant pulling force. Since the pulling force on both sides is almost constant, the first slider 12 can be moved inside the first slide groove 41 to move the support ring 1. The movement of the support ring 1 makes the position where surgery is required better exposed to the field of vision of medical staff, which is more convenient during surgery. During operation, the characteristics of the coil spring 50 ensure that the force of the retractor hooks 14 on both sides is kept constant when the incision is opened. Excessive force will not be applied, causing the incision to be pulled and causing secondary damage, and at the same time, it will not be too small to affect the operation. When the coil spring 50 has a constant force, the medical staff only needs to pull the retractor hook 14 to the incision position, and there is no need to manually pull the rack 4. This protects the patient from secondary injury while automatically opening the wound. There is no need for the staff to adjust the retractor hook 14. If the retractor hook 14 moves to open the incision, if the support ring 1 blocks the operation, the support ring 1 is adjusted to move at this time. Due to the characteristics of the coil spring 50, when moving, the rack 4 moves relative to the support block 2, and will not change the pulling force of the retractor hook 14 on the incision, and will not cause harm to the patient, thereby improving the convenience and safety of work.

[0025] like Figure 4 and Figure 5 As shown, the outer side of the support cylinder 18 is slidably connected to a polygonal block 20, and the front end of the polygonal block 20 is located inside the support cylinder 18 and is fixedly connected to a first spring 22. The first spring 22 pushes the polygonal block 20 toward the rear end, and the front end of the polygonal block 20 is fixedly connected to a hand-turning rod 19. The hand-turning rod 19 can move the polygonal block 20 forward and drive the polygonal block 20 to rotate. The rear end of the support cylinder 18 is rotatably connected to the front end of the support block 2, and the polygonal block 20 is clamped with the front end of the support block 2. When the polygonal block 20 is inside the support block 2, the support block 2 limits the rotation of the polygonal block 20. Since the polygonal block 20 is partially located inside the support tube 18, when the polygonal block 20 is located inside the support block 2, the support tube 18 is also fixed relative to the support block 2. When the retractor 14 needs to be adjusted, the hand-turned rod 19 is pulled forward, and the hand-turned rod 19 drives the polygonal block 20 to disengage from the support block 2. At this time, the hand-turned rod 19 is rotated to drive the polygonal block 20 to rotate, and the polygonal block 20 drives the support tube 18 to rotate. The rotation of the support tube 18 causes the deformation of the coil spring 50 to change. It should be noted that due to the characteristics of the coil spring 50, when changing the elastic force, multiple turns of rotation are required to cause a certain deformation. In this way, when working, the staff can adjust the elastic force of the coil spring 50 according to the conditions of different patients before opening the incision to suit different patients, thereby improving the applicability of the device.

[0026] like Figure 8 and Figure 9 As shown, the limiting assembly includes a first threaded rod 44 threadedly connected to the inside of the first slider 12, and rectangular openings 47 are provided on the opposite sides of the two support seats 13. When the first slider 12 moves, it drives the first threaded rod 44 to move, and the rectangular openings 47 provide space for the first threaded rod 44 to move. The rod wall of the first threaded rod 44 is sleeved with a second spring 46, and the rod wall of the first threaded rod 44 is sleeved with a contact block 45. The contact block 45 can move back and forth on the rod wall of the first threaded rod 44. One end of the first threaded rod 44 is fixedly connected to a knob, and the knob contacts the second spring 46 to limit the second spring 46. After the position of the first slider 12 is adjusted, the first threaded rod 44 is rotated at this time. The first threaded rod 44 moves toward the inside of the first slider 12, driving the knob to move, thereby compressing the second spring 46. The compressed second spring 46 pushes the contact block 45 toward the side wall of the support seat 13. Under the action of the second spring 46, friction is generated with the support seat 13, thereby limiting the first slider 12, so that the entire device is in a stable state during surgery.

[0027] like Figure 3As shown, the upper end of the support block 2 is fixedly connected to the air cylinder 5, and the interior of the air cylinder 5 is slidably connected to the first piston block 51, which can move inside the air cylinder 5. A round block 52 is fixedly connected to one side of the first piston block 51. The round block 52 is set in multiple ways, and one side of the round block 52 is fixedly connected to the first pipe 31. Through the setting of the round block 52, the interior of the air cylinder 5 and the first pipe 31 can be communicated. The interior of the first pipe 31 is fixedly connected to the first one-way valve 32. The first one-way valve 32 is the prior art, which allows gas to pass in one direction. The opposite sides of the two first pipes 31 are fixedly connected to the housing 16. The lower end of the housing 16 is fixedly connected to the upper end of the rack 4. The opposite sides of the two gas cylinders 5 are fixedly connected to the second one-way valve 33. The opposite sides of the two housings 16 are fixedly connected to the second pipe 30. The lower end of the retractor 14 is provided with a suction port 37, which is connected to the second pipe 30. The interior of the housing 16 is slidably connected to a dirt collection box 34, which collects accumulated liquid. Then put the two hooks 14 into the incision position, the rack 4 moves to drive the first pipe 31 to move toward the inside of the air cylinder 5, and the first pipe 31 drives the first piston block 51 to move. When the first piston block 51 moves, the air pressure inside the air cylinder 5 near the hook 14 is reduced, and the first pipe 31 generates a negative pressure inside the shell 16, and then the second pipe 30 generates a negative pressure at the suction port 37, thereby sucking out the accumulated liquid at the incision position, so that the accumulated liquid enters the inside of the shell 16, and is collected by the dirt box 34. When the work is finished, the dirt box 34 is pulled out for cleaning. It should be noted that When the first tube 31 moves toward the outside of the air cylinder 5, the first one-way valve 32 is in a closed state and the second one-way valve 33 is in an open state. When the first tube 31 moves toward the inside of the air cylinder 5, the first one-way valve 32 is in an open state and the second one-way valve 33 is in a closed state. This ensures that the accumulated fluid can be sucked away normally, and at the same time, it can avoid blowing air into the incision position to avoid causing discomfort. In this way, when the incision is opened by the retractor 14, the accumulated fluid and blood at the incision position can be sucked away by the first piston block 51, which improves the doctor's vision and facilitates the operation.

[0028] like Figure 2 As shown, a handle 17 is fixedly connected to the front end of the housing 16, and the handle 17 is used to facilitate the movement of the movable rack 4.

[0029] like Figure 6 and Figure 7As shown, the inner part of the hook 14 is rotatably connected to the toggle block 15, and the toggle block 15 can rotate relative to the hook 14. A rectangular groove 25 is provided inside the toggle block 15, and a moving block 24 is slidably connected inside the rectangular groove 25. The moving block 24 can be inside the toggle block 15. Under the action of the second threaded rod 23, the moving block 24 always maintains a horizontal state. The upper end of the moving block 24 is rotatably connected to the second threaded rod 23, and the rod wall of the second threaded rod 23 is threadedly connected to the inner part of the rack 4; After the retractor 14 opens the incision, the second threaded rod 23 is rotated as needed, and the second threaded rod 23 moves up and down relative to the rack 4, and the second threaded rod 23 drives the moving block 24 to move up and down. The moving block 24 moves vertically up and down, causing the toggle block 15 to rotate. In this way, during operation, some positions that are not affected or are not on the same level as the retractor 14 are further limited by the toggle block 15 to prevent other positions from affecting the operation, further improving the device and improving the use effect.

[0030] like Figure 6 and Figure 7 As shown, the lower end of the toggle block 15 is fixedly connected to a suction cup 35, the upper end of the suction cup 35 is fixedly connected to a hose 36, the upper end of the rack 4 is fixedly connected to a cylinder 26, the lower end side wall of the cylinder 26 is communicated with the hose 36, the interior of the cylinder 26 is slidably connected to a second piston block 29, the second piston block 29 can move up and down relative to the cylinder 26, the upper end of the second piston block 29 is fixedly connected to a telescopic rod 28, the interior of the telescopic rod 28 is fixedly connected to a third spring 27, the third spring 27 makes the telescopic rod 28 in a retracted state, the rod wall of the telescopic rod 28 is slidably connected to the upper end of the cylinder 26, the upper end of the telescopic rod 28 is rotatably connected to the limit bar 53, and the front and rear positions of the upper end of the cylinder 26 are fixedly connected to the support plate 38; By pulling the telescopic rod 28 upward, the telescopic rod 28 drives the second piston block 29 to move upward, so that the position of the cylinder 26 at the lower end of the second piston block 29 is in a negative pressure state, thereby causing the suction cup 35 to adsorb the pried part, thereby improving the stability of the prying. The third spring 27 is used to prevent the adsorption force of the suction cup 35 from being too large, causing discomfort to the patient. The telescopic rod 28 moves upward and drives the limit bar 53 to move upward, and then the limit bar 53 is rotated, and then the limit bar 53 is placed on the upper end of the support plate 38, so that the telescopic rod 28 is in an upward state.

[0031] like Figure 8 and Figure 9As shown, the lower end of the support ring 1 is rotatably connected to the circular ring 39, and the support ring 1 can rotate relative to the circular ring 39, so that the position of the hook 14 can be adjusted, and the front end of the support block 2 is evenly fixedly connected to the clamping block 6, and the upper end of the front support rod 8 is provided with a second sliding groove 48, and the second slider 40 is slidably connected inside the second sliding groove 48. The front end of the second slider 40 is fixedly connected to the fourth spring 42, and the fourth spring 42 pushes the second slider 40 backward. The rear end of the second slider 40 is fixedly connected to the limiting rod 7, and the second slider 40 drives the limiting rod 7 to move. The interior of the second sliding groove 48 is fixedly connected to the sliding rod 43, and the movement of the second slider 40 is more stable through the sliding rod 43. The sliding rod 43 is slidably connected to the interior of the second slider 40; First, pull the limit rod 7 forward, and the support ring 1 rotates relative to the circular ring 39. When working, rotate the support ring 1. The rotation of the support ring 1 causes the position of the retractor 14 to be adjusted accordingly, thereby improving the applicability of the device and facilitating the operation. After adjustment, release the limit rod 7, and the second slider 40 moves backward under the action of the fourth spring 42, driving the limit rod 7 to move. The rear end of the limit rod 7 is provided with a friction block that contacts the clamping block 6, thereby limiting the rotation of the support ring 1.

[0032] like Figure 8 As shown, the lower end of the support seat 13 is fixedly connected to the electric rod 9, the lower end of the electric rod 9 is fixedly connected to the mounting seat 10, and the upper ends of the mounting seat 10 are fixedly connected to vertical rods 11 on both sides. The rod walls of the vertical rods 11 are slidably connected to the two sides of the support seat 13. The entire device is fixedly installed through the mounting seat 10, and the electric rod 9 can drive the entire device to move up and down.

[0033] Working principle: When working, the two racks 4 are pulled and approach each other, and the two retractors 14 are hooked to the incision position of the operation, and then the corresponding racks 4 are released. At this time, the rod 49 rotates under the action of the coil spring 50, and the coil spring 50 causes the tooth roller 21 to rotate. The rotation of the tooth roller 21 causes the rack 4 to move. Since the coil spring 50 can provide a constant force, the force of the rod 49 to rotate remains unchanged. The rod 49 drives the tooth roller 21 to rotate, and the rotation of the tooth roller 21 causes the rack 4 to drive the retractors 14 to move. The two retractors 14 provide a constant pulling force. Since the pulling force on both sides is almost constant, the support ring 1 can be moved by moving the first slider 12 inside the first slide groove 41. , the movement of the support ring 1 makes the position requiring surgery better exposed to the field of vision of the medical staff, so that it is more convenient during the operation. In this way, during work, through the characteristics of the coil spring 50, the force of the retractor 14 on both sides is kept constant when the incision is opened, and excessive force will not cause the incision to be pulled and cause secondary injury, and at the same time, it will not be too small to affect the operation. When the coil spring 50 has a constant force, it is only necessary to pull the retractor 14 to the incision position, and the medical staff does not need to manually pull the rack 4. This protects the patient from secondary injury and can automatically open the wound without the need for the staff to adjust the retractor 14, thereby improving the convenience and safety of the work; Furthermore, when the polygonal block 20 is inside the support block 2, the support block 2 limits the rotation of the polygonal block 20. Since the polygonal block 20 is partially located inside the support tube 18, when the polygonal block 20 is inside the support block 2, the support tube 18 is also fixed relative to the support block 2. When the retractor 14 needs to be adjusted, the hand-turned rod 19 is pulled forward, and the hand-turned rod 19 drives the polygonal block 20 to separate from the support block 2. At this time, the hand-turned rod 19 is rotated to drive the polygonal block 20 to rotate, and the polygonal block 20 drives the support tube 18 to rotate. The rotation of the support tube 18 causes the deformation of the coil spring 50 to change. It should be noted that due to the characteristics of the coil spring 50, when changing the elastic force, it is necessary to rotate multiple times to achieve a certain deformation. In this way, when working, the staff can adjust the elastic force of the coil spring 50 according to the conditions of different patients before opening the incision to suit different patients, thereby improving the applicability of the device. Furthermore, after the position of the first slider 12 is adjusted, the first threaded rod 44 is rotated, and the first threaded rod 44 moves toward the inside of the first slider 12, driving the knob to move, thereby compressing the second spring 46. The compressed second spring 46 pushes the contact block 45 toward the side wall of the support seat 13. Under the action of the second spring 46, friction is generated with the support seat 13, thereby limiting and fixing the first slider 12, so that the entire device is in a stable state during surgery; Furthermore, when the two hooks 14 are placed in the incision position, the rack 4 moves to drive the first pipe 31 to move toward the inside of the air cylinder 5, and the first pipe 31 drives the first piston block 51 to move. When the first piston block 51 moves, the air pressure inside the air cylinder 5 near the hook 14 is reduced, and a negative pressure is generated inside the shell 16 through the first pipe 31, and then a negative pressure is generated at the suction port 37 through the second pipe 30, thereby sucking out the accumulated liquid at the incision position, allowing the accumulated liquid to enter the inside of the shell 16, and collecting the accumulated liquid through the dirt box 34. When the work is completed, the dirt box 34 is pulled out for cleaning. It should be noted that It is clear that when the first pipe 31 moves toward the outside of the air cylinder 5, the first one-way valve 32 is in a closed state and the second one-way valve 33 is in an open state. When the first pipe 31 moves toward the inside of the air cylinder 5, the first one-way valve 32 is in an open state and the second one-way valve 33 is in a closed state. This ensures that the accumulated fluid can be sucked away normally and at the same time avoids blowing air into the incision position to avoid causing discomfort. In this way, when the incision is opened by the retractor 14, the accumulated fluid and blood at the incision position can be sucked away by the first piston block 51, so that the doctor's vision is better and it is conducive to the progress of the operation. Furthermore, after the retractor 14 opens the incision, the second threaded rod 23 is rotated as needed, and the second threaded rod 23 moves up and down relative to the rack 4, and the second threaded rod 23 drives the moving block 24 to move up and down. The moving block 24 moves vertically up and down, causing the toggle block 15 to rotate. In this way, during operation, some positions that are not acted on or are not on the same level as the retractor 14 are further limited by the toggle block 15, thereby preventing other positions from affecting the operation, further improving the device and improving the use effect. Furthermore, by pulling the telescopic rod 28 upward, the telescopic rod 28 drives the second piston block 29 to move upward, so that the position of the cylinder 26 at the lower end of the second piston block 29 is in a negative pressure state, thereby causing the suction cup 35 to adsorb the part to be opened, thereby improving the stability of the opening. The third spring 27 is used to prevent the adsorption force of the suction cup 35 from being too large, which may cause discomfort to the patient. The telescopic rod 28 moves upward, driving the limit bar 53 to move upward, and then the limit bar 53 is rotated and then placed on the upper end of the support plate 38, so that the telescopic rod 28 is in an upward state. Furthermore, first pull the limit rod 7 forward, and the support ring 1 rotates relative to the circular ring 39. When working, rotate the support ring 1. The rotation of the support ring 1 causes the position of the retractor 14 to be adjusted accordingly, thereby improving the applicability of the device and facilitating the operation. After adjustment, release the limit rod 7, and the second slider 40 moves backward under the action of the fourth spring 42, driving the limit rod 7 to move. The rear end of the limit rod 7 is provided with a friction block that contacts the clamping block 6, thereby limiting the rotation of the support ring 1.

[0034] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A surgical retractor for hepatobiliary and pancreatic surgery, comprising a support ring (1) and a support seat (13), wherein the support seat (13) is located in front and rear positions of the support ring (1), and is characterized in that: Both sides of the support ring (1) are provided with constant force pulling components; The constant force pulling assembly comprises a support block (2) fixedly connected to both sides of the support ring (1), the inner wall of the upper end of the support block (2) is slidably connected to a T-limiting block (3), the lower end of the T-limiting block (3) is fixedly connected to a rack (4), the interior of the support block (2) is rotatably connected to a toothed roller (21), the outer side of the toothed roller (21) is meshedly connected to the lower end of the rack (4), the opposite sides of the two racks (4) are fixedly connected to a draw hook (14), the front end of the toothed roller (21) is fixedly connected to a rod (49), and the rod (49) The outer side of the support ring (13) is fixedly connected to a coil spring (50), the outer side of the coil spring (50) is fixedly connected to a support tube (18), the rear end of the support tube (18) is movably connected to the support block (2), the front and rear positions of the support ring (1) are fixedly connected to a support rod (8), the upper end of the support seat (13) is provided with a first slide groove (41), the interior of the first slide groove (41) is slidably connected to a first slider (12), the upper end of the first slider (12) is fixedly connected to the lower end of the support rod (8), and a limiting component is provided on one side of the first slider (12).

2. The surgical retractor for hepatobiliary and pancreatic surgery according to claim 1, characterized in that: The outer side of the support tube (18) is slidably connected to a polygonal block (20), the front end of the polygonal block (20) is located inside the support tube (18) and is fixedly connected to a first spring (22), the front end of the polygonal block (20) is fixedly connected to a hand-turning rod (19), the rear end of the support tube (18) is rotatably connected to the front end of the support block (2), and the polygonal block (20) is clamped to the front end of the support block (2).

3. The surgical retractor for hepatobiliary and pancreatic surgery according to claim 1, characterized in that: The limiting assembly includes a first threaded rod (44) threadedly connected to the inside of the first slider (12), and rectangular openings (47) are provided on opposite sides of the two support seats (13). The rod wall of the first threaded rod (44) is provided with a second spring (46), and the rod wall of the first threaded rod (44) is provided with a contact block (45). The contact block (45) can move back and forth on the rod wall of the first threaded rod (44). One end of the first threaded rod (44) is fixedly connected to a knob, and the knob contacts the second spring (46) to limit the second spring (46).

4. The surgical retractor for hepatobiliary and pancreatic surgery according to claim 1, characterized in that: The upper end of the support block (2) is fixedly connected to an air cylinder (5), the interior of the air cylinder (5) is slidably connected to a first piston block (51), one side of the first piston block (51) is fixedly connected to a round block (52), and the round block (52) is provided in multiple arrangements. One side of the round block (52) is fixedly connected to a first pipe fitting (31), the interior of the first pipe fitting (31) is fixedly connected to a first one-way valve (32), the opposite sides of the two first pipe fittings (31) are fixedly connected to a housing (16), the lower end of the housing (16) is fixedly connected to the upper end of the rack (4), the opposite sides of the two air cylinders (5) are fixedly connected to a second one-way valve (33), the opposite sides of the two housings (16) are fixedly connected to a second pipe fitting (30), and the lower end of the draw hook (14) is provided with a suction port (37), and the suction port (37) is communicated with the second pipe fitting (30).

5. The surgical retractor for hepatobiliary and pancreatic surgery according to claim 4, characterized in that: A handle (17) is fixedly connected to the front end of the housing (16).

6. The surgical retractor for hepatobiliary and pancreatic surgery according to claim 4, characterized in that: A dirt collection box (34) is slidably connected to the interior of the housing (16).

7. The surgical retractor for hepatobiliary and pancreatic surgery according to claim 1, characterized in that: The interior of the pull hook (14) is rotatably connected to a toggle block (15), a rectangular groove (25) is provided inside the toggle block (15), and a moving block (24) is slidably connected inside the rectangular groove (25). The moving block (24) can be inside the toggle block (15), and the upper end of the moving block (24) is rotatably connected to a second threaded rod (23), and the rod wall of the second threaded rod (23) is threadedly connected to the interior of the rack (4).

8. The surgical retractor for hepatobiliary and pancreatic surgery according to claim 7, characterized in that: The lower end of the toggle block (15) is fixedly connected to a suction cup (35), the upper end of the suction cup (35) is fixedly connected to a hose (36), the upper end of the rack (4) is fixedly connected to a cylinder (26), the lower end side wall of the cylinder (26) is communicated with the hose (36), the interior of the cylinder (26) is slidably connected to a second piston block (29), the upper end of the second piston block (29) is fixedly connected to a telescopic rod (28), the interior of the telescopic rod (28) is fixedly connected to a third spring (27), the rod wall of the telescopic rod (28) is slidably connected to the upper end of the cylinder (26), the upper end of the telescopic rod (28) is rotatably connected to a limit bar (53), and the front and rear positions of the upper end of the cylinder (26) are fixedly connected to a support plate (38).

9. The surgical retractor for hepatobiliary and pancreatic surgery according to claim 1, characterized in that: The lower end of the support ring (1) is rotatably connected to a circular ring (39), the front end of the support block (2) is evenly fixedly connected to a clamping block (6), the upper end of the front support rod (8) is provided with a second sliding groove (48), the interior of the second sliding groove (48) is slidably connected to a second slider (40), the front end of the second slider (40) is fixedly connected to a fourth spring (42), the rear end of the second slider (40) is fixedly connected to a limiting rod (7), the interior of the second sliding groove (48) is fixedly connected to a sliding rod (43), and the sliding rod (43) is slidably connected to the interior of the second slider (40).

10. The surgical retractor for hepatobiliary and pancreatic surgery according to claim 1, characterized in that: The lower end of the support seat (13) is fixedly connected to an electric rod (9), the lower end of the electric rod (9) is fixedly connected to a mounting seat (10), both sides of the upper end of the mounting seat (10) are fixedly connected to vertical rods (11), and the rod walls of the vertical rods (11) are slidably connected to both sides of the support seat (13).

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