A thyroid laparoscopic surgery retractor with foldable front end

Abstract

The present invention discloses a thyroid laparoscopic surgical retractor with a foldable front end, comprising an action mechanism and a power mechanism for driving the action mechanism to move; the power mechanism comprises an expansion cylinder, an outer shell, an air bag arranged on the outer side of one end of the outer shell, a three-way reversing valve and a curved straight cylinder arranged inside the outer shell, the air outlet of the air bag is connected with the air inlet of the three-way reversing valve, the two air outlets of the three-way reversing valve are respectively connected with the expansion cylinder and the curved straight cylinder, and the air bag is provided with an air release valve; the action mechanism comprises a curved straight shell, a curved straight rotating shaft, a curved straight connecting rod, two expansion plates and four expansion connecting rods for expanding the width of the curved straight shell, the curved straight rotating shaft and the curved straight shell form a lever mechanism on the outer shell, and the expansion cylinder is located in the curved straight shell.

Description

Technical Field

[0001] The invention relates to the field of surgical instruments, in particular to a thyroid laparoscopic surgical retractor with a foldable front end. Background Art

[0002] Traditional thyroid surgery involves exposing and removing the thyroid gland through an anterior cervical incision, which inevitably leaves visible scars on the neck. For people with scars, this scar will appear particularly obvious, seriously affecting the patient's appearance and physical and mental health. Surgeons can now complete thyroid removal through multiple remote locations outside the neck with the assistance of laparoscopy, thereby effectively avoiding visible scars on the neck. However, there are currently many laparoscopic thyroid surgery approaches, and the surgical instruments are also very messy. A small number of them are special retractors, and most of them use large retractors for abdominal or thoracic surgery. Moreover, many retractors cannot be used interchangeably. At the same time, because the laparoscopic incision is very small, the front end of the current retractor is too large to enter the wound cavity, and the retractor that can enter the wound cavity is very small, which cannot achieve the effect of sufficient traction and exposure. Summary of the invention

[0003] In response to the above problems, the present invention provides a thyroid laparoscopic surgical retractor with a foldable front end. The retractor has a foldable front end and can enter the wound cavity through an incision and then be opened to meet various traction exposures during the operation, improve the quality and speed of the operation, and increase the safety of the operation.

[0004] The technical solution of the present invention is:

[0005] A thyroid laparoscopic surgery retractor with a foldable front end, comprising an action mechanism and a power mechanism for driving the action mechanism to move;

[0006] The power mechanism comprises an expansion cylinder, an inflatable bag, a three-way reversing valve and a curved cylinder, the air outlet of the inflatable bag is connected to the air inlet of the three-way reversing valve, the two air outlets of the three-way reversing valve are respectively connected to the expansion cylinder and the curved cylinder, and the inflatable bag is provided with an air release valve;

[0007] The action mechanism includes a curved straight housing, a curved straight rotating shaft, a curved straight connecting rod, and an expansion mechanism of a six-link structure. The curved straight rotating shaft is arranged on the curved straight housing and forms a lever mechanism. One end of the curved straight connecting rod is hinged on the piston rod of the curved straight cylinder, and the other end is hinged on the side of the short lever arm of the lever mechanism. The piston rod of the expansion cylinder is hinged on a hinge point of the expansion mechanism.

[0008] The expansion cylinder is located in the curved and straight housing.

[0009] The working principle of the above technical solution is as follows:

[0010] First, the inflatable bag and the curved and straight cylinder are connected by a three-way reversing valve to realize the switching of the thyroid laparoscopic surgery retractor from an "I" shape to an "L" shape, and then the inflatable bag and the expansion cylinder are connected by a three-way reversing valve to form a rectangular structure with the expansion connecting rod and the expansion plate for expanding the width of the curved and straight shell; after the operation, the gas in the curved and straight cylinder and the expansion cylinder is discharged by the deflation valve on the inflatable bag to restore the thyroid laparoscopic surgery retractor to an "I" shape; this solution solves the problem that the retractor is too large to enter the wound cavity due to the small laparoscopic incision, and at the same time avoids the negative effects brought about by the above-mentioned problem, such as low surgical quality, slow surgical speed and large wound cavity.

[0011] In a further technical solution, the expansion mechanism includes two expansion plates and four expansion connecting rods, and the two expansion plates are respectively hinged at both ends of an expansion connecting rod. The expansion plates are located on both sides of the curved and straight shell, and the hinge points of the two expansion connecting rods are hinged on the piston rod of the expansion air pump. The hinge points of the other two expansion connecting rods are hinged at the ends on the inner side of the curved and straight shell.

[0012] In a further technical solution, the thyroid laparoscopic surgical retractor with a foldable front end also includes a shell, and both ends of the curved straight shaft are fixed in the shell, and the lever arm length of the curved straight shell on one side of the shell is smaller than the lever arm length on the other side of the curved straight shell.

[0013] In a further technical solution, the length directions of the two expansion plates are consistent, and there is a gap between the two expansion plates.

[0014] In a further technical solution, the rotation angle range of the curved and straight shell movement is greater than or equal to 90° and less than 180°.

[0015] In a further technical solution, the width of the expansion plate is less than half of the width of the curved and straight shell; and the expansion connecting rod is equal to 1.5 times to 2 times the width of the curved and straight shell.

[0016] The beneficial effects of the present invention are:

[0017] 1. First, the three-way reversing valve is used to connect the inflatable bag and the curved and straight cylinder to realize the switching of the thyroid laparoscopic surgery retractor from the "I" shape to the "L" shape, and then the three-way reversing valve is used to connect the inflatable bag and the expansion cylinder to form a rectangular structure for expanding the width of the curved and straight shell; after the operation, the gas in the curved and straight cylinder and the expansion cylinder is discharged by the deflation valve on the inflatable bag, so that the thyroid laparoscopic surgery retractor is restored to the "I" shape; through this solution, the problem that the retractor is too large to enter the wound cavity due to the small laparoscopic incision is solved, and the negative effects caused by the above problems are avoided, such as: low surgical quality, slow surgical speed and large wound cavity;

[0018] 2. The piston rod of the curved straight cylinder and the short end of the curved straight housing lever arm are connected by a curved straight connecting rod, which solves the problem of plane position difference caused by the linear motion of the piston rod and the rotation of the short lever arm of the curved straight housing;

[0019] 3. The expansion connecting rod and the expansion plate form an active hexagon, which is driven by the expansion cylinder to solve the problem that the front end of the existing surgical retractor cannot enter the wound due to its wide front end;

[0020] 4. A manual valve is used to switch the direction of the airflow, solving the problem that the solenoid valve requires a power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a thyroid laparoscopic surgery retractor with a foldable front end according to the present invention;

[0022] Figure 2 It is a schematic diagram of the structure when the expansion piston on the expansion cylinder of the present invention is fully retracted;

[0023] Figure 3 It is a schematic structural diagram of the expansion piston on the expansion cylinder of the present invention when it is fully extended;

[0024] Description of reference numerals:

[0025] 10. Inflatable bag; 11. Curved and straight air pipe; 12. Three-way reversing valve; 13. Expansion air pipe; 14. Curved and straight cylinder; 141. Curved and straight piston; 15. Expansion cylinder; 151. Expansion piston; 21. Curved and straight housing; 22. Curved and straight shaft; 231. Curved and straight connecting rod; 232. First connecting rod; 233. Second connecting rod; 234. Third connecting rod; 235. Fourth connecting rod; 241. First expansion plate; 242. Second expansion plate; 30. Housing. DETAILED DESCRIPTION

[0026] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] Example:

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, a thyroid laparoscopic surgery retractor with a foldable front end includes an action mechanism and a power mechanism for driving the action mechanism to move;

[0029] The power mechanism includes a housing 30, an inflatable bag 10, a three-way reversing valve 12, a curved straight cylinder 14, a curved straight air pipe 11, an expansion cylinder 15, an expansion air pipe 13, a curved straight piston 141 and an expansion piston 151;

[0030] The shell 30 is in the shape of a letter "I" as a whole, and has a chamber inside. The inflatable bag 10 is fixed to one end of the outer side of the shell 30. The three-way reversing valve 12, the curved straight air pipe 11 and the curved straight cylinder 14 are located inside the shell 30. The curved straight piston 141 is arranged on the curved straight cylinder 14. An air release valve is arranged on the inflatable bag 10. The gas output end of the inflatable bag 10 is connected to the air inlet of the three-way reversing valve 12 through the inflatable air pipe. One air outlet of the three-way reversing valve 12 is connected to the air inlet of the curved straight cylinder 14 through a curved straight air pipe 11. The other air outlet of the three-way reversing valve 12 is connected to the air inlet of the curved straight cylinder 14 through an expansion air pipe 13. The air flow direction through the three-way reversing valve 12 is: from the inflatable bag 10 to the curved straight cylinder 14 or from the inflatable bag 10 to the expansion cylinder 15.

[0031] The above-mentioned action mechanism includes a curved straight connecting rod 231, a curved straight rotating shaft 22, a curved straight housing 21 in a hollow rectangular parallelepiped, an expansion cylinder 15 located at one end of the curved straight housing 21, an expansion plate and an expansion connecting rod located at the other end of the curved straight housing 21, the expansion connecting rod includes a first connecting rod 232, a second connecting rod 233, a third connecting rod 234 and a fourth connecting rod 235 of equal length, the expansion plate includes a first expansion plate 241 and a second expansion plate 242, the expansion plate is rectangular, and the four expansion connecting rods and two expansion plates constitute an expansion mechanism;

[0032] A curved straight rotating shaft 22 is fixed to both sides of the curved straight housing 21 near one end, and the curved straight housing 21 and the curved straight rotating shaft 22 form a lever mechanism on the end of the housing 30 where the inflatable bag 10 is not provided. The two ends of the curved straight rotating shaft 22 are fixed inside the housing 30 at this end. The short lever arm length of the lever mechanism is equal to one fifth of the long lever arm length. One end of the short lever arm of the lever mechanism formed by the curved straight housing 21 and the curved straight rotating shaft 22 is located inside the housing 30; one end of the curved straight connecting rod 231 is hinged to the end of the curved straight piston 141, and the curved straight connecting rod 231 is hinged to the end of the curved straight piston 141. The other end of the straight-curved shell 21 is hinged on a side surface of the end of the straight-curved shell 21 in the shell 30. When the straight-curved piston 141 of the straight-curved cylinder 14 is fully extended, the thyroid laparoscopic surgery retractor is in an "L" shape as a whole. When the straight-curved piston 141 of the straight-curved cylinder 14 is fully retracted, the thyroid laparoscopic surgery retractor is in an "I" shape as a whole. In order to avoid the dead position of the straight-curved shell 21 when the straight-curved connecting rod 231 is driven, the angle range of the straight-curved shell 21 rotating around the straight-curved rotating shaft 22 is: greater than or equal to 90° and less than 180°.

[0033] The expansion piston 151 is arranged on the expansion cylinder 15, one end of the first connecting rod 232 is hinged to one end of the second connecting rod 233, and is also hinged to the end of the expansion piston 151, the other end of the first connecting rod 232 is hinged to a corner of the first expansion plate 241, and the other end of the second connecting rod 233 is hinged to a corner of the second expansion plate 242; one end of the third connecting rod 234 is hinged to one end of the fourth connecting rod 235, and is also hinged to the end of the longer force arm of the curved and straight housing 21, the other end of the third connecting rod 234 is hinged to a corner of the first expansion plate 241, and the corner and the corner where the first connecting rod 232 is hinged are on the same side in the length direction of the expansion plate, and similarly, the other end of the fourth connecting rod 235 is hinged to a corner of the second expansion plate 242;

[0034] A movable hexagon is formed by two expansion plates and four expansion connecting rods. When the expansion piston 151 of the expansion cylinder 15 is fully extended, the expansion connecting rod and the expansion plate form a rectangular structure. At this time, the first expansion plate 241 and the second expansion plate 242 extend to both sides of the curved straight housing 21, thereby increasing the width of the curved straight housing 21; when the expansion piston 151 on the expansion cylinder 15 is retracted, the expansion connecting rod and the expansion plate form a hexagonal structure, and the first expansion plate 241 and the second expansion plate 242 are retracted into the curved straight housing 21, thereby reducing the width of the curved straight housing 21;

[0035] When in use, firstly, one end of the thyroid laparoscopic surgical retractor provided with the curved and straight shell 21 is inserted into the wound, and then the curved and straight piston 141 of the curved and straight cylinder 14 is extended by using the inflation valve and adjusting the direction of the three-way reversing valve 12 to form an "L"-shaped structure, and then the three-way reversing valve 12 is adjusted, and the inflation bag 10 is used to work on the expansion cylinder 15 to extend the expansion piston 151, and the hexagonal expansion connecting rod and expansion plate are transformed into a rectangular structure; after the operation, the gas in the curved and straight cylinder 14 and the expansion cylinder 15 is discharged by the deflation valve on the inflation bag 10, so that the thyroid laparoscopic surgical retractor is restored to the "I" shape; through this technical solution, the problem that the retractor is too large to enter the wound cavity due to the small laparoscopic incision is solved, and at the same time, the negative effects caused by the above-mentioned problem are avoided, such as: low surgical quality, slow surgical speed and large wound cavity.

[0036] In another embodiment:

[0037] like Figure 1 As shown, the three-way reversing valve 12 is a manual reversing valve, and the manual switch is arranged on the outside of the shell 30 for easy adjustment. The advantage of the manual valve over the solenoid valve is that it does not need to be connected to the power supply and the controller, which makes the structure simpler and can also reduce the mass of the thyroid laparoscopic surgery hook.

[0038] In another embodiment:

[0039] When the expansion piston 151 on the expansion cylinder 15 is fully extended, the width of the rectangular structure of the expansion connecting rod and the expansion plate is equal to three to four times the width of the above-mentioned straight and curved shell 21. If the rectangular structure is too wide, the required length of the straight and curved shell 21 is too long, and it is not easy to unfold inside the wound. If the rectangular structure is too narrow, various traction and exposure purposes cannot be achieved.

[0040] In another embodiment:

[0041] like Figure 2 As shown, the width of the first expansion plate 241 is the same as that of the second expansion plate 242, and both are smaller than half of the width of the curved straight shell 21. When the expansion piston 151 on the expansion cylinder 15 is fully retracted, the first expansion plate 241 and the second expansion plate 242 are located inside the curved straight shell 21. Therefore, the first expansion plate 241 and the second expansion plate 242 are too wide to be placed in the curved straight shell 21. At the same time, there is a gap between the first expansion plate 241 and the second expansion plate 242, which can avoid the active dead point phenomenon when the expansion piston 151 on the expansion cylinder 15 is extended.

[0042] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A thyroid laparoscopic surgery retractor with a foldable front end, characterized in that: It includes an action mechanism and a power mechanism for driving the action mechanism to move; The power mechanism comprises an expansion cylinder, an inflatable bag, a three-way reversing valve and a curved cylinder, the air outlet of the inflatable bag is connected to the air inlet of the three-way reversing valve, the two air outlets of the three-way reversing valve are respectively connected to the expansion cylinder and the curved cylinder, and the inflatable bag is provided with an air release valve; The action mechanism includes a curved straight housing, a curved straight rotating shaft, a curved straight connecting rod, and an expansion mechanism of a six-link structure. The curved straight rotating shaft is arranged on the curved straight housing and forms a lever mechanism. One end of the curved straight connecting rod is hinged on the piston rod of the curved straight cylinder, and the other end is hinged on the side of the short lever arm of the lever mechanism. The piston rod of the expansion cylinder is hinged on a hinge point of the expansion mechanism. The expansion cylinder is located in the curved and straight housing; The expansion mechanism includes two expansion plates and four expansion connecting rods, two expansion plates are respectively hinged to one expansion connecting rod at both ends, the expansion plates are located on both sides of the curved and straight shell, the mutual hinge points of the two expansion connecting rods are hinged to the piston rod of the expansion cylinder, and the mutual hinge points of the other two expansion connecting rods are hinged to the ends of the inner side of the curved and straight shell; The thyroid laparoscopic surgical retractor with a foldable front end also includes an outer shell, which is generally in the shape of an "I" and has a chamber inside. The two ends of the curved and straight rotating shaft are fixed in the outer shell, and the length of the force arm on one side of the curved and straight shell located in the outer shell is smaller than the length of the force arm on the other side of the curved and straight shell.

2. A thyroid laparoscopic surgery retractor with a foldable front end according to claim 1, characterized in that: The length directions of the two expansion plates are consistent, and there is a gap between the two expansion plates.

3. The thyroid laparoscopic surgery retractor with foldable front end according to claim 1, characterized in that: The rotation angle range of the curved and straight housing movement is greater than or equal to 90° and less than 180°.

4. The thyroid laparoscopic surgery retractor with foldable front end according to claim 2, characterized in that: The width of the expansion plate is less than half of the width of the curved and straight shell; the expansion connecting rod is equal to 1.5 times to 2 times the width of the curved and straight shell.

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