Surgical retractor with adjustable traction force

Abstract

The utility model relates to the technical field of retractors, in particular to a surgical retractor with adjustable traction force, which comprises a close-fitting disc, suckers are equiangularly distributed on the bottom surface of the close-fitting disc, three groups of straight notches are formed in the middle of the close-fitting disc, and a worm is rotatably connected to the top surface of the close-fitting disc through a fixing plate. The interiors of the three straight notches are slidably connected with movable rods, and the top ends of the movable rods are fixedly connected with outer arc-shaped rings. According to the improved surgical retractor, the retraction hook is hooked to the edge of a surgical wound, the worm drives the worm wheel to rotate, the outer arc-shaped ring drives the retraction hook to retract the surgical wound through the pull rope under the cooperation of the arc-shaped groove and the straight groove opening, and the position of the rope sleeve part of the pull rope can be changed in the gap of the limiting protruding strip on the surface of the outer arc-shaped rod; according to the surgical retractor, the position of the retraction hook is adjusted, a surgical incision is retracted from different angles and directions, so that the adaptability of the surgical retractor is enhanced, and the surgical retractor can be used for retracting wounds in various shapes.

Description

Technical Field

[0001] This utility model relates to the field of retraction device technology, specifically a surgical retractor with adjustable traction force. Background Technology

[0002] Retractors, also known as retractors, are used to retract tissue, expose the surgical area, and facilitate exploration and manipulation. They can be divided into handheld retractors and automatic retractors. They are available in various shapes and sizes, allowing for the selection of the appropriate retractor based on surgical needs. Existing retractors with external casings do not allow for adjustment of the tension of the retraction rope, which can easily lead to strain injuries due to excessive traction when retracting human tissue. Therefore, we have introduced a surgical retractor with adjustable traction force.

[0003] An existing patent (publication number: CN220632140U) discloses a surgical retractor, including a main frame, an adjusting rod, a lifting platform, a magnetic fixing component, an automatic retraction component, a support frame, a retraction rod, a rotating sleeve, and an anti-slip groove. The adjusting rod is connected to a threaded groove on the main frame, with its bottom rotatably connected to the lifting platform. The top of the adjusting rod is fixedly fitted with a rotating sleeve. This invention utilizes the magnetic fixing component to fix the retraction rod in the mounting groove at the bottom of the support frame. The retraction rod can be removed from the retractor by pulling out the plug to detach the first magnet from the retractor. The installation and disassembly process is simple, facilitating the replacement of different models of retraction rods, thereby improving the user experience for medical staff. During surgery, the automatic retraction component replaces manual adjustment of the retractor's retraction width, reducing the surgeon's workload while ensuring the retraction accuracy and improving the retractor's practicality. The existing technology has the following problems: When using the existing shell puller, it is inconvenient to adjust the tension of the pull rope, which can easily lead to damage due to excessive traction. Utility Model Content

[0004] The purpose of this invention is to provide a surgical retractor with adjustable traction force to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a surgical retractor with adjustable traction force, comprising a body-fitting disc, suction cups evenly distributed on the bottom surface of the body-fitting disc, three sets of straight grooves in the middle of the body-fitting disc, and a worm gear rotatably connected to the top surface of the body-fitting disc via a fixed plate. Movable rods are slidably connected inside the three straight grooves, and an outer arc-shaped ring is fixedly connected to the top of the movable rod. Several limiting protrusions are integrally formed on the outer surface of the outer arc-shaped ring, and a pull rope is sleeved in the gap between the several limiting protrusions. A retraction hook is fixedly connected to one end of the pull rope near the central axis of the outer arc-shaped ring.

[0006] Preferably, the pull rope consists of a rope sleeve and a straight rope portion, with the rope sleeve portion fitted onto the surface of the outer arc-shaped ring, and the outer edge of the outer arc-shaped ring having rounded corners.

[0007] Preferably, the inner walls of the three sets of straight grooves are provided with annular grooves, and a lower limiting piece is slidably connected inside the annular grooves.

[0008] Preferably, the lower limiting piece is integrally formed at the bottom end of the movable rod, and the upper limiting piece is integrally formed on the outer side of the top end of the movable rod.

[0009] Preferably, the worm gear meshes with the worm wheel, and the worm wheel is annular. A rotating ring is fixedly connected to the bottom surface of the inner ring of the worm wheel, and the bottom surface of the rotating ring is rotatably connected to the top surface of the body plate.

[0010] Preferably, the worm gear has three sets of arc-shaped grooves at equal angles in the middle, and the movable rod slides through the middle of the arc-shaped grooves.

[0011] Preferably, the top surface of the worm gear is in contact with the bottom surface of the upper limit plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] In this invention, the suction cup is attached to the patient, so that the part to be operated on is located in the middle of the inner ring of the worm gear, ensuring that the retractor will not interfere with the operation. Then, the retraction hook is hooked on the edge of the surgical wound, and the worm gear is driven to rotate by the worm. With the cooperation of the arc groove and the straight groove, the outer arc ring drives the retraction hook to retract the surgical incision through the pull rope.

[0014] In this invention, the loop part of the pull rope can be changed between the gaps of the limiting protrusions on the surface of the outer arc-shaped rod, thereby adjusting the position of the retraction hook and retracting the surgical incision from different angles and directions. This enhances the adaptability of the surgical retractor and enables it to retract wounds of various shapes. Attached Figure Description

[0015] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0017] Figure 3 This is a partial frontal cross-sectional three-dimensional structural schematic diagram of the present invention;

[0018] Figure 4 This is a front-view three-dimensional structural diagram of the outer arc-shaped ring of this utility model.

[0019] In the diagram: 1. Body-fitting disc; 2. Suction cup; 3. Straight groove; 4. Worm gear; 5. Movable rod; 6. Outer arc ring; 7. Rotating ring; 8. Limiting protrusion; 9. Pull rope; 10. Pulling hook; 11. Annular groove; 12. Lower limit plate; 13. Upper limit plate; 14. Worm gear; 15. Arc groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 4 This utility model provides a technical solution: a surgical retractor with adjustable traction force, including a body-fitting plate 1. Suction cups 2 are distributed at equal angles on the bottom surface of the body-fitting plate 1. Three sets of straight grooves 3 are formed in the middle of the body-fitting plate 1. A worm gear 4 is rotatably connected to the top surface of the body-fitting plate 1 via a fixed plate. A movable rod 5 is slidably connected inside the three straight grooves 3. An outer arc-shaped ring 6 is fixedly connected to the top of the movable rod 5. Several limiting protrusions 8 are integrally formed on the outer surface of the outer arc-shaped ring 6. A pull rope 9 is sleeved in the gap between the limiting protrusions 8. A retraction hook 10 is fixedly connected to one end of the pull rope 9 near the central axis of the outer arc-shaped ring 6. The worm gear 4 meshes with a worm wheel 14, and the worm wheel 14 is annular. A rotating ring 7 is fixedly connected to the bottom surface of the inner ring of the worm wheel 14. The bottom surface of the rotating ring 7 is rotatably connected to the top surface of the body-fitting plate 1. Three sets of arc-shaped grooves 15 are rotatably formed in the middle of the worm wheel 14. The movable rod 5 slides... The worm gear 4 is rotated to drive the worm wheel 14. The worm wheel 14 rotates around the central axis of the rotating ring 7, using the arc-shaped groove 15 in the middle to move the movable rod 5. Since the bottom end of the movable rod 5 is slidably positioned within the straight groove 3 via the lower limit plate 12, the movable rod 5 can only move in a straight line along the straight groove 3, moving closer to or further away from the central axis of the worm wheel 14. This changes the tension of the pull rope 9, thus adjusting the traction force. The worm 4 is attached to the patient, ensuring the surgical area is in the middle of the inner ring of the worm wheel 14, ensuring the retractor does not interfere with the surgery and allowing the surgical site to be fully exposed. Then, the retractor hook 10 hooks the edge of the surgical opening, pulling the opening open to prevent closure and ensure normal operation. When the traction force needs adjustment, the worm 4 is rotated to drive the worm wheel 14. The worm wheel 14 rotates around the central axis of the rotating ring 7, using the arc-shaped groove 15 in the middle to compress the movable rod 5. Because the bottom end of the movable rod 5 is slidably positioned within the straight groove 3 via the lower limit plate 12, the movable rod 5 can only move in a straight line along the straight groove 3, moving closer to or further away from the central axis of the worm wheel 14, thereby changing the tension of the pull rope 9 and adjusting its traction force.

[0022] In this embodiment, as Figure 4As shown, the pull rope 9 consists of a rope sleeve and a straight rope section. The rope sleeve is fitted onto the surface of the outer arc-shaped ring 6, and the outer edge of the outer arc-shaped ring 6 is rounded. The rounded corner structure can reduce wear between the rope sleeve and the outer arc-shaped ring 6, and extend the service life of the pull rope 9. The rope sleeve can be adjusted between different limiting protrusions 8, thereby changing the position of the retraction hook 10. This structure can adjust the position of the retraction hook 10 according to wounds of different sizes and shapes, improving the adaptability of this surgical retractor.

[0023] In this embodiment, as Figure 3 As shown, the inner walls of the three sets of straight grooves 3 are provided with annular grooves 11. A lower limiting piece 12 is slidably connected inside the annular groove 11. The lower limiting piece 12 is integrally formed at the bottom end of the movable rod 5, and an upper limiting piece 13 is integrally formed on the outer side of the top end of the movable rod 5. The top surface of the worm gear 14 is in contact with the bottom surface of the upper limiting piece 13. Through the cooperation of the upper limiting piece 13 and the lower limiting piece 12, the movable rod 5 can be vertically limited to prevent it from falling under the action of gravity and its bottom end from contacting the human skin and causing obstruction during movement. At the same time, the cooperation of the two sets of limiting pieces can also prevent the movable rod 5 from coming out of the body plate 1. The lower limiting piece 12 is elliptical. This structure can prevent the lower limiting piece 12 from rotating in the annular groove 11, which would cause the movable rod 5 to rotate, and ultimately cause the outer arc ring 6 to rotate about the movable rod 5 as the axis.

[0024] The method of use and advantages of this utility model: When using this adjustable traction force surgical retractor, the working process is as follows:

[0025] First, the suction cup 2 is attached to the patient, positioning the area requiring surgery in the center of the inner ring of the worm gear 14. This ensures that the retractor will not interfere with the surgery. Then, the retraction hook 10 is hooked onto the edge of the surgical wound. The worm gear 14 is rotated by the worm 4. With the cooperation of the arc groove 15 and the straight groove 3, the outer arc ring 6 pulls the retraction hook 10 to retract the surgical incision via the pull rope 9. Furthermore, the loop of the pull rope 9 can be repositioned between the gaps of the limiting protrusions 8 on the surface of the outer arc ring 6, thereby adjusting the position of the retraction hook 10 and retracting the surgical incision from different angles and directions. This enhances the adaptability of the surgical retractor, enabling it to retract wounds of various shapes.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A surgical retractor with adjustable traction force, comprising a body-hugging disc (1), characterized in that: The bottom surface of the body-fitting plate (1) is equidistantly distributed with suction cups (2). The middle part of the body-fitting plate (1) is provided with three sets of straight slots (3). The top surface of the body-fitting plate (1) is rotatably connected to a worm gear (4) through a fixed plate. The three straight slots (3) are slidably connected to movable rods (5). The top of the movable rods (5) is fixedly connected to an outer arc ring (6). The outer surface of the outer arc ring (6) is integrally formed with several limiting protrusions (8). Pull ropes (9) are sleeved in the gaps between the several limiting protrusions (8). The end of the pull rope (9) near the central axis of the outer arc ring (6) is fixedly connected to a pull hook (10).

2. The surgical retractor with adjustable traction force according to claim 1, characterized in that: The pull rope (9) consists of a rope sleeve and a straight rope part. The rope sleeve part is fitted onto the surface of the outer arc ring (6), and the outer edge of the outer arc ring (6) is rounded.

3. The surgical retractor with adjustable traction force according to claim 1, characterized in that: The inner walls of the three sets of straight slots (3) are provided with annular grooves (11), and a lower limiting piece (12) is slidably connected inside the annular grooves (11).

4. A surgical retractor with adjustable traction force according to claim 3, characterized in that: The lower limit piece (12) is integrally formed at the bottom end of the movable rod (5), and the upper limit piece (13) is integrally formed on the outer side of the top end of the movable rod (5).

5. A surgical retractor with adjustable traction force according to claim 1, characterized in that: The worm (4) meshes with the worm wheel (14), and the worm wheel (14) is annular. A rotating ring (7) is fixedly connected to the bottom surface of the inner ring of the worm wheel (14), and the bottom surface of the rotating ring (7) is rotatably connected to the top surface of the body plate (1).

6. A surgical retractor with adjustable traction force according to claim 5, characterized in that: The worm gear (14) has three sets of arc-shaped grooves (15) at equal angles in the middle, and the movable rod (5) slides through the middle of the arc-shaped grooves (15).

7. A surgical retractor with adjustable traction force according to claim 6, characterized in that: The top surface of the worm gear (14) is in contact with the bottom surface of the upper limit plate (13).

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