Four-way synchronous retractor and operation method thereof

Abstract

The invention is suitable for the field of medical instruments, and provides a four-way synchronous retractor and an operation method thereof.The four-way synchronous retractor comprises a rotating mechanism, traction mechanisms and a driving mechanism, by arranging the rotating mechanism, the traction mechanisms and the driving mechanism, when an upper disc in the rotating mechanism rotates relative to a lower disc, the upper disc rotates to drive teeth to be in meshing transmission with a circular fluted disc, and the teeth are driven to be meshed with the circular fluted disc; the multiple forceps are driven to rotate synchronously, traction operation is conducted on tissue around a wound from multiple directions, the operation view is expanded, the coordination and synchronism of actions of all traction mechanisms are guaranteed, meanwhile, the force and direction for retracting the tissue are easier to control, a surgeon can conduct operation conveniently, and the operation efficiency is improved. The problems that a common retractor used in open type operations such as the abdomen and the pelvic cavity can only conduct traction in the horizontal or vertical direction, deformation is caused by tissue pulling in other directions, a wound area is invaded, and the size of an operation incision is affected are solved.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, in particular to a four-way synchronous retractor and an operating method thereof. Background Art

[0002] In the field of modern surgery, open surgery in the abdomen, pelvis and other parts is a key means of treating many diseases. This type of surgery often requires full exposure of the surgical field so that the surgeon can clearly observe the tissue structure of the surgical site and accurately perform operations such as removing diseased tissues and repairing damaged organs. As an indispensable surgical auxiliary instrument, the core function of the retractor is to expand the surgical operating space by pulling the tissues around the wound to ensure the smooth progress of the operation.

[0003] However, the retractors commonly used in clinical practice have obvious limitations in actual use: most retractors are designed to only pull tissues in the horizontal or vertical direction. In complex abdominal and pelvic surgical scenarios, the tissues around the wound are not only subjected to force in these two conventional directions. When the surgical operation needs to maintain the operating space in other non-horizontal and non-vertical directions such as inclined and diagonal directions, the existing retractors are difficult to meet the needs.

[0004] Since it cannot provide stable and appropriate traction in multiple directions at the same time, during the operation, the tissue around the wound will be deformed due to the unbalanced pulling force. The result of this deformation is often that the tissue invades the wound area, making the originally stretched operating incision smaller, seriously affecting the exposure of the surgical field. This not only places extremely high demands on the operating accuracy and proficiency of the surgeon, but also may greatly increase the difficulty of the surgical operation due to the limited surgical field of view, prolong the operation time, and increase the surgical risk of the patient, such as damage to important blood vessels and nerves due to misoperation. It is also not conducive to the recovery of patients after surgery. Based on the limitations of the above-mentioned prior art and the actual needs of clinical surgery, the retractor of the present invention was developed to solve the key problems mentioned above and provide better instrument support for surgical operations. Summary of the invention

[0005] The object of the present invention is to provide a four-way synchronous retractor and an operating method thereof to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A four-way synchronous retractor, comprising a rotating mechanism, a pulling mechanism and a driving mechanism; the rotating mechanism comprises an upper plate, a bottom plate and a reset pin, the upper plate is rotatably mounted on the bottom plate, and the bottom surface of the upper plate is symmetrically and fixedly provided with a reset pin in the same diameter direction, a pair of first arc grooves are provided on the bottom plate, the reset pins are slidably arranged in the first arc grooves, and a spring is placed in the first arc groove; four pulling mechanisms are provided, the four pulling mechanisms are arranged in a circular array and are fixedly mounted on the bottom plate by threads, the pulling mechanism comprises pliers, a retractor, a screw 1, a screw 2, a bearing 1 and a bearing 2, the pliers One end of the clamp is mounted on the chassis by screw 1, and the pliers are rotatably arranged by bearing 1, the retractor is mounted on the bottom surface of the other end of the pliers by screw 2, and is rotatably arranged by bearing 2; the driving mechanism includes the same number of driving units as the pulling mechanism, wherein when the upper plate rotates relative to the chassis, the driving mechanism drives the multiple pliers to rotate, the driving unit includes a circular toothed disk and a plurality of teeth meshing with the circular toothed disk, the circular toothed disk is fixedly mounted on the end of the pliers, bearing 1 is mounted in the circular toothed disk, the inner ring array of the upper plate is provided with a plurality of slots, and the plurality of teeth are arranged in the slots at equal intervals.

[0008] As a further solution of the present invention: the pliers include a mounting piece mounted on the chassis and a flip piece rotatably mounted on the mounting piece by means of screws, the circular toothed disc is fixedly mounted on the mounting piece, and the pull hook is rotatably mounted on the side of the flip piece.

[0009] As a further solution of the present invention: a plurality of ceramic beads are rotatably mounted on the bottom surface of the upper plate, and a second arc-shaped groove for the ceramic beads to roll is provided on the bottom plate.

[0010] As a further solution of the present invention: an upper plate pull bolt and a lower plate pull bolt are fixedly provided on both sides of the same diameter direction of the upper plate and the bottom plate, respectively, and the upper plate pull bolt and the lower plate pull bolt are staggered.

[0011] As a further solution of the present invention: a limiting mechanism is also provided on the upper plate, and the limiting mechanism is used to limit the rotation of the upper plate relative to the lower plate. The limiting mechanism includes a pin shaft switch, a pin shaft, a reset spring and a fixed pin. The pin shaft is movably installed on the upper plate through the reset spring, and the top end of the pin shaft is rotatably installed with a pin shaft switch through the fixed pin, and the bottom end of the pin shaft is fixedly installed with a limiting protrusion, and a groove is opened on the side of the chassis corresponding to the position of the pin shaft, and a plurality of limiting teeth are fixedly arranged in the groove.

[0012] A method for operating a four-way synchronous retractor, characterized in that the specific steps are as follows:

[0013] S1. During the surgical preparation stage, first place the retractor at the appropriate position of the surgical wound. According to the direction and range of the tissue around the wound that needs to be retracted, manually rotate the upper plate. With the help of the smooth rolling of the ceramic beads, the angle of the upper plate relative to the bottom plate can be easily adjusted. At this time, the reset pin can be reset at any time with the cooperation of the spring in the arc groove, which is convenient for finding the appropriate initial angle;

[0014] S2. If you need to lock the upper plate position to prevent accidental rotation, you can operate the pin switch of the limit mechanism, and use the reset spring to make the limit protrusion at the bottom end of the pin fit into the limit tooth of the bottom plate groove to lock it;

[0015] S3. When retracting the wound tissue, first operate the pin switch to release the lock of the upper plate, and then rotate the upper plate pull bolt and the lower plate pull bolt on the upper plate and the bottom plate. As the upper plate rotates, the teeth of the driving mechanism mesh with the circular toothed plate, driving multiple forceps to rotate synchronously, pulling the retractor to retract the tissue from multiple directions, expanding the surgical operation space;

[0016] S4. After the wound is pulled open to a suitable size, the pin switch of the limit mechanism is operated again to relock the upper plate;

[0017] S5. After the operation, operate each component in reverse, loosen the tissue, and remove the retractor.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides a rotating mechanism, a plurality of pulling mechanisms and a driving mechanism. When the upper plate in the rotating mechanism rotates relative to the lower plate, the upper plate rotates to drive the meshing transmission of the teeth and the circular toothed plate, so as to realize driving the synchronous rotation of the plurality of forceps, and performing traction operations on the tissues around the wound from multiple directions, thereby expanding the surgical field of view. While ensuring the coordination and synchronization of the actions of the various pulling mechanisms, the force and direction of the tissue retraction are easier to control, which is convenient for the surgeon to perform the surgical operation, and solves the problem that in open surgeries such as the abdomen and pelvis, the commonly used retractors can only be used for traction in the horizontal or vertical direction, and the other directions will be deformed due to the pulling of the tissues, thereby invading the wound area and affecting the size of the operating incision. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a four-way synchronous retractor;

[0021] Figure 2 An exploded view of a four-way synchronous retractor;

[0022] Figure 3 for Figure 1 Schematic diagram of the local internal structure;

[0023] Figure 4It is an exploded view of a pulling mechanism in a four-way synchronous retractor;

[0024] Figure 5 It is a structural schematic diagram of a limit mechanism in a four-way synchronous retractor;

[0025] In the figure: 1. rotating mechanism; 1-1. upper plate; 1-2. bottom plate; 1-3. reset pin; 1-4. first arc groove; 2. pulling mechanism; 2-1. pliers; 2-2. hook; 2-3. screw one; 2-4. screw two; 2-5. bearing one; 2-6. bearing two; 3. driving mechanism; 3-1. circular toothed plate; 3-2. teeth; 4. mounting part; 5. flip part; 6. ceramic bead; 7. second arc groove; 8. limiting mechanism; 8-1. pin shaft switch; 8-2. pin shaft; 8-3. reset spring; 8-4. fixing pin; 8-5. limiting teeth; 9. upper plate pull bolt; 10. lower plate pull bolt. DETAILED DESCRIPTION

[0026] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0027] See also Figure 1-5 , a four-way synchronous retractor, comprising a rotating mechanism 1, a pulling mechanism 2 and a driving mechanism 3;

[0028] The rotating mechanism 1 comprises an upper plate 1-1, a bottom plate 1-2 and a reset pin 1-3. The upper plate 1-1 is rotatably mounted on the bottom plate 1-2, and the reset pin 1-3 is symmetrically fixedly arranged in the same diameter direction on the bottom surface of the upper plate 1-1. A pair of first arc grooves 1-4 are provided on the bottom plate 1-2. The reset pin 1-3 is slidably arranged in the first arc groove 1-4, and a spring (not shown in the figure) is placed in the first arc groove 1-4. The upper plate 1-1 is connected to the bottom plate 1-2 by rotation, and a matching structure between the reset pin 1-3 and the spring in the first arc groove 1-4 is arranged, so that the upper plate 1-1 can be automatically reset with the help of the elastic force of the spring after rotating relative to the bottom plate 1-2, so that the angle can be flexibly adjusted according to different retraction requirements during surgery, and the reset function ensures the convenience and repeatability of operation, and improves the flexibility and efficiency of the retractor when using;

[0029] See also Figure 1, the pulling mechanism 2 is provided with four, the four pulling mechanisms 2 are arranged in a circular array and are fixedly installed on the chassis 1-2 through threads, the pulling mechanism 2 includes a pliers 2-1, a hook 2-2, a screw 2-3, a screw 2-4, a bearing 2-5 and a bearing 2-6, one end of the pliers 2-1 is installed on the chassis 1-2 through a screw 2-3, and the pliers 2-1 is rotatably arranged through a bearing 2-5, the hook 2-2 is installed on the bottom surface of the other end of the pliers 2-1 through a screw 2-4, and is rotatably arranged through a bearing 2-6, and the four pulling mechanisms 2 are fixed on the chassis 1-2 at equal intervals, which can be The circumferentially evenly distributes the retraction force, and stably and evenly pulls the tissues around the wound from four different directions, fully covering the surgical area, more comprehensively and effectively expanding the surgical operation space, avoiding the problem of uneven tissue force caused by uneven retraction, and providing a good field of view and operating conditions for the surgery. The forceps 2-1 and the retractor 2-2 are respectively rotated by the bearing 1 2-5 and the bearing 2 2-6, so that they can flexibly adjust the angle and position when contacting the tissue and performing the retraction action, better adapt to the shape and force direction of different tissues, effectively improve the accuracy and stability of the retracted tissue, and help the smooth implementation of the surgery;

[0030] See also Figure 1-3 The driving mechanism 3 includes the same number of driving units as the pulling mechanism 2, wherein when the upper plate 1-1 rotates relative to the bottom plate 1-2, the driving mechanism 3 drives the multiple pliers 2-1 to rotate, and the driving unit includes a circular toothed disc 3-1 and a plurality of teeth 3-2 meshing with the circular toothed disc 3-1, wherein the circular toothed disc 3-1 is fixedly mounted at the end of the pliers 2-1, and a bearing 2-5 is mounted in the circular toothed disc 3-1, and the inner ring array of the upper plate 1-1 is provided with a plurality of notches, and a plurality of teeth 3-2 are arranged in the notches at equal intervals. This design of the driving mechanism 3 utilizes the rotation of the upper plate 1-1 to drive the teeth The meshing transmission of the teeth 3-2 and the circular toothed disc 3-1 drives the multiple forceps 2-1 to rotate synchronously, ensuring the coordination and synchronization of the actions of the pulling mechanisms 2, making it easier to control the force and direction of tissue retraction, and maintaining the consistency of the overall retraction effect when retracting tissue in multiple directions, further improving the stability of the surgical operation space, facilitating the surgeon to perform the operation, and solving the problem that in open surgeries such as the abdomen and pelvis, commonly used retractors can only be used for traction in the horizontal or vertical direction, and the other directions will be deformed due to tissue pulling, thereby invading the wound area and affecting the size of the operating incision.

[0031] Please refer to the figure Figure 2 and Figure 3A plurality of ceramic beads 6 are also rotatably mounted on the bottom surface of the upper plate 1-1, and a second arc groove 7 for the ceramic beads 6 to roll is provided on the bottom plate 1-2. The ceramic beads 6 roll in the second arc groove 7, which effectively reduces the friction force when the upper plate 1-1 and the bottom plate 1-2 rotate relative to each other, making the rotation operation of the upper plate 1-1 smoother and lighter, and saving more effort for the operator when adjusting the angle of the retractor, etc. At the same time, it also reduces the wear between components, helps to extend the service life of the retractor, and ensures its long-term stable and reliable operation.

[0032] See also Figure 1 and Figure 3 An upper plate pull bolt 9 and a lower plate pull bolt 10 are fixedly arranged on both sides of the same diameter direction of the upper plate 1-1 and the bottom plate 1-2, and the upper plate pull bolt 9 and the lower plate pull bolt 10 are staggered. The arrangement of the upper plate pull bolt 9 and the lower plate pull bolt 10 facilitates the rotation of the upper plate 1-1 and the lower plate.

[0033] See also Figure 1 and Figure 5 The upper plate 1-1 is also provided with a limit mechanism 8, which is used to limit the rotation of the upper plate 1-1 relative to the lower plate. The limit mechanism 8 includes a pin switch 8-1, a pin 8-2, a reset spring 8-3 and a fixed pin 8-4. The pin 8-2 is movably mounted on the upper plate 1-1 through the reset spring 8-3, and the top of the pin 8-2 is rotatably mounted with the pin switch 8-1 through the fixed pin 8-4. The bottom end of the pin 8-2 is fixedly mounted with a limit protrusion, and a groove is opened on the side of the bottom plate 1-2 corresponding to the position of the pin 8-2, and a plurality of limit protrusions are fixedly arranged in the groove. The existence of tooth 8-5 and limit mechanism 8 can limit the rotation of upper plate 1-1 relative to lower plate as needed. By operating pin switch 8-1 and utilizing reset spring 8-3 to control the cooperation between the limit protrusion at the bottom end of pin 8-2 and the limit tooth 8-5 in the groove of bottom plate 1-2, the rotation state of upper plate 1-1 can be flexibly locked or unlocked. During the operation, it can ensure that the retractor remains stable after reaching the appropriate retraction angle and position, avoiding the retraction effect affected by accidental rotation. At the same time, it is also convenient to make corresponding adjustments according to the progress of the operation, thereby improving the controllability and safety of the use of the retractor.

[0034] See also Figure 4The pliers 2-1 include a mounting member 4 mounted on the chassis 1-2 and a flip member 5 rotatably mounted on the mounting member 4 by means of screws. The circular toothed disc 3-1 is fixedly mounted on the mounting member 4, and the retractor 2-2 is rotatably mounted on the side of the flip member 5. The pliers 2-1 adopts a structure in which the mounting member 4 and the flip member 5 are rotatably connected by screws, combined with the rotatable mounting method of the retractor 2-2 on the side of the flip member 5, so that the pliers 2-1 and the retractor 2-2 have more dimensions of flexibility as a whole, can better fit tissues of different shapes and positions around the wound, accurately pull the tissues, and enhance the adaptability of the retractor to the different tissue retraction requirements in complex surgical scenarios.

[0035] A method for operating a four-way synchronous retractor, characterized in that the specific steps are as follows:

[0036] S1. In the surgical preparation stage, the retractor is first placed at a suitable position of the surgical wound. According to the direction and range of the tissue around the wound that needs to be retracted, the upper plate 1-1 is manually rotated. With the help of the smooth rolling of the ceramic beads 6, the angle of the upper plate 1-1 relative to the bottom plate 1-2 can be easily adjusted. At this time, the reset pin 1-3 can be reset at any time with the cooperation of the spring in the arc groove, which is convenient for finding a suitable initial angle;

[0037] S2. If the upper plate 1-1 needs to be locked to prevent accidental rotation, the pin switch 8-1 of the limit mechanism 8 can be operated to make the limit protrusion at the bottom end of the pin 8-2 snap into the limit tooth 8-5 of the groove of the bottom plate 1-2 through the reset spring 8-3 to lock it;

[0038] S3. When retracting the wound tissue, first operate the pin switch 8-1 to release the lock of the upper plate 1-1, and then rotate the upper plate pull bolt 9 and the lower plate pull bolt 10 on the upper plate 1-1 and the bottom plate 1-2. As the upper plate 1-1 rotates, the teeth 3-2 of the driving mechanism 3 mesh with the circular toothed plate 3-1, driving the multiple forceps 2-1 to rotate synchronously, pulling the retractor 2-2 to retract the tissue from multiple directions, thereby expanding the surgical operation space;

[0039] S4, after the wound is pulled open to a suitable size, the pin switch 8-1 of the limit mechanism 8 is operated again to re-lock the upper plate 1-1;

[0040] S5. After the operation, operate each component in reverse, loosen the tissue, and remove the retractor.

[0041] Working principle: The four-way synchronous retractor and its operation method are mainly based on mechanical transmission and ingenious structural coordination to achieve the tissue retraction function. In the rotating mechanism 1, the upper plate 1-1 can rotate relative to the bottom plate 1-2, and the automatic resetting after rotation is realized by relying on the reset pin 1-3 and the spring in the arc groove. The pulling mechanism 2 is fixed to the bottom plate 1-2 by threads, and its forceps 2-1 and retractor 2-2 can be flexibly rotated with the help of bearings to better contact and pull the tissue. When the upper plate 1-1 rotates, the teeth 3-2 in the upper notch of the driving mechanism 3 and the circular toothed disc 3-1 at the end of the forceps 2-1 are engaged and driven to drive multiple forceps 2-1 to rotate synchronously, so as to achieve multi-directional coordinated tissue retraction. The ceramic beads 6 reduce the rotation friction. The upper plate pull bolt 9 and the lower plate pull bolt 10 ensure the stability of the structure. The limit mechanism 8 controls the rotation locking state of the upper plate 1-1 through the pin shaft 8-2, the reset spring 8-3, etc. The synergistic effect of various parts provides a stable and multi-directional tissue retraction effect for surgery and ensures the surgical field of view and operating space.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A four-way synchronous retractor, characterized in that: It comprises a rotating mechanism (1), a pulling mechanism (2) and a driving mechanism (3); The rotating mechanism (1) comprises an upper plate (1-1), a bottom plate (1-2) and a reset pin (1-3); the upper plate (1-1) is rotatably mounted on the bottom plate (1-2), and the reset pin (1-3) is symmetrically and fixedly arranged on the bottom surface of the upper plate (1-1) in the same diameter direction; a pair of first arc-shaped grooves (1-4) are opened on the bottom plate (1-2), the reset pin (1-3) is slidably arranged in the first arc-shaped grooves (1-4), and a spring is placed in the first arc-shaped groove (1-4); Four pulling mechanisms (2) are provided, and the four pulling mechanisms (2) are arranged in a ring array and are fixedly mounted on the chassis (1-2) by means of threads. The pulling mechanism (2) comprises a pliers (2-1), a retractor (2-2), a screw 1 (2-3), a screw 2 (2-4), a bearing 1 (2-5) and a bearing 2 (2-6). One end of the pliers (2-1) is mounted on the chassis (1-2) by means of a screw 1 (2-3), and the pliers (2-1) is rotatably arranged by means of a bearing 1 (2-5). The retractor (2-2) is mounted on the bottom surface of the other end of the pliers (2-1) by means of a screw 2 (2-4), and is rotatably arranged by means of a bearing 2 (2-6). The driving mechanism (3) comprises the same number of driving units as the pulling mechanism (2), wherein when the upper plate (1-1) rotates relative to the bottom plate (1-2), the driving mechanism (3) drives the plurality of pliers (2-1) to rotate, and the driving unit comprises a circular toothed disc (3-1) and a plurality of teeth (3-2) meshing with the circular toothed disc (3-1), the circular toothed disc (3-1) is fixedly mounted on the end of the pliers (2-1), a bearing 1 (2-5) is mounted in the circular toothed disc (3-1), and a plurality of notches are formed in the inner ring array of the upper plate (1-1), and the plurality of teeth (3-2) are arranged in the notches at equal intervals.

2. The four-way synchronous retractor according to claim 1, characterized in that: The pliers (2-1) comprise a mounting member (4) mounted on a chassis (1-2) and a flip member (5) rotatably mounted on the mounting member (4) via a screw, the circular toothed disc (3-1) being fixedly mounted on the mounting member (4), and the draw hook (2-2) being rotatably mounted on a side of the flip member (5).

3. The four-way synchronous retractor according to claim 1, characterized in that: A plurality of ceramic beads (6) are also rotatably mounted on the bottom surface of the upper plate (1-1), and a second arc-shaped groove (7) for the ceramic beads (6) to roll is provided on the bottom plate (1-2).

4. The four-way synchronous retractor according to claim 1, characterized in that: An upper plate pull bolt (9) and a lower plate pull bolt (10) are fixedly arranged on both sides of the upper plate (1-1) and the bottom plate (1-2) in the same diameter direction, respectively. The upper plate pull bolt (9) and the lower plate pull bolt (10) are staggered.

5. The four-way synchronous retractor according to claim 1, characterized in that: A limiting mechanism (8) is also provided on the upper plate (1-1), and the limiting mechanism (8) is used for limiting the rotation of the upper plate (1-1) relative to the lower plate. The limiting mechanism (8) comprises a pin shaft switch (8-1), a pin shaft (8-2), a return spring (8-3) and a fixed pin (8-4). The pin shaft (8-2) is movably mounted on the upper plate (1-1) via the return spring (8-3), and the top end of the pin shaft (8-2) is rotatably mounted with the pin shaft switch (8-1) via the fixed pin (8-4), and a limiting protrusion is fixedly mounted on the bottom end of the pin shaft (8-2). A groove is provided on the side surface of the bottom plate (1-2) corresponding to the position of the pin shaft (8-2), and a plurality of limiting teeth (8-5) are fixedly arranged in the groove.

6. A method for operating a four-way synchronous retractor, characterized in that: The specific steps are as follows: S1. In the surgical preparation stage, the retractor is first placed at a suitable position of the surgical wound. According to the direction and range of the tissue around the wound that needs to be retracted, the upper plate (1-1) is manually rotated. With the help of the smooth rolling of the ceramic beads (6), the angle of the upper plate (1-1) relative to the bottom plate (1-2) is easily adjusted. At this time, the reset pin (1-3) can be reset at any time with the cooperation of the spring in the arc groove, so as to facilitate finding a suitable initial angle; S2. If the position of the upper plate (1-1) needs to be locked to prevent accidental rotation, the pin switch (8-1) of the limit mechanism (8) can be operated to make the limit protrusion at the bottom end of the pin (8-2) engage in the limit tooth (8-5) of the groove of the bottom plate (1-2) through the return spring (8-3) to lock it; S3. When retracting wound tissue, first operate the pin switch (8-1) to release the lock of the upper plate (1-1), then rotate the upper plate pull bolt (9) and the lower plate pull bolt (10) on the upper plate (1-1) and the bottom plate (1-2). As the upper plate (1-1) rotates, the teeth (3-2) of the driving mechanism (3) mesh with the circular toothed plate (3-1) to drive the multiple forceps (2-1) to rotate synchronously, and pull the retractor (2-2) to retract the tissue from multiple directions, thereby expanding the surgical operation space; S4, after the wound is pulled open to a suitable size, the pin switch (8-1) of the limit mechanism (8) is re-operated to re-lock the upper plate (1-1); S5. After the operation, operate each component in reverse, loosen the tissue, and remove the retractor.

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