Telescopic head-replaceable endoscopic surgical instrument

Abstract

The utility model discloses a telescopic head-replaceable endoscopic surgical instrument, which relates to the technical field of endoscopic surgical instruments, and comprises an extension bar, the front end of the extension bar is in threaded connection with a main sleeve, the upper part of the front end of the main sleeve is fixedly provided with a fixed mounting head, and the lower part of the front end of the main sleeve is rotationally connected with a rotary mounting head; clamping pliers are clamped to the front ends of the fixed mounting head and the rotary mounting head, a connecting block is fixedly mounted at the rear end of the lengthening rod, grips are rotationally connected to the upper end and the lower end of the rear end of the connecting block, and a circular ring column is fixedly mounted in the center of the rear end of the connecting block. By arranging a series of structures, when the length needs to be reduced, the main sleeve is rotated towards the rear end, the main sleeve can drive the rotary mounting head to move backwards in the length direction of the lengthening rod, the rotary mounting head can drive the secondary sleeve to move synchronously, and then the length of the device is reduced; the length of the device can be changed according to environmental requirements, and use is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of laparoscopic surgical instruments, in particular to a laparoscopic surgical instrument with a retractable and replaceable head. Background Art

[0002] Surgical instruments refer to the medical instruments used in clinical operations. Thoracoscopic and laparoscopic surgery is a newly developed minimally invasive method. During the operation, extended surgical instruments are used to enter the patient's body for minimally invasive treatment.

[0003] There are many types of existing forceps surgical instruments used for thoracoscopic and laparoscopic surgeries. For different diseases or in one operation, many types of forceps surgical instruments are often needed. Such extended forceps surgical instruments are generally of fixed length. During the operation, many types of extended forceps surgical instruments are placed together, which are prone to misalignment, thereby affecting the doctor's use. In addition, the head clamping structure of such surgical instruments is often fixed and cannot be replaced, which is inconvenient to use. Utility Model Content

[0004] The purpose of the utility model is to provide a retractable and replaceable head laparoscopic surgical instrument to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a retractable and interchangeable head laparoscopic surgical instrument, comprising an extension rod, the front end of the extension rod is threadedly connected to a main sleeve, the upper front end of the main sleeve is fixedly installed with a fixed mounting head, the lower front end of the main sleeve is rotatably connected with a rotating mounting head, the front ends of the fixed mounting head and the rotating mounting head are both clamped with clamps, the rear end of the extension rod is fixedly installed with a connecting block, the upper and lower ends of the rear end of the connecting block are rotatably connected with handles, an annular column is fixedly installed at the center position of the rear end of the connecting block, a connecting rod is installed inside the annular column, the front end of the connecting rod passes through the internal through hole of the connecting block and the extension rod and is slidably connected with a secondary sleeve, the lower front end of the secondary sleeve is connected to the rotating mounting head, and the lower end of the upper handle is installed with an extrusion plate, the extrusion plate passes through the annular column and is connected to the upper end of the connecting rod.

[0006] Preferably, both upper and lower ends of the rear end of the circular ring column are rotatably connected to support rods, the two support rods are respectively connected to the inner walls of the two handles, and a torsion spring is provided at the connection between the support rod and the circular ring column.

[0007] Preferably, a rotation arc groove is provided at both upper and lower ends of the rear end of the connection block, and a rotation circular plate is installed at the front end of the handle, and the rotation circular plate is rotatably connected to the inside of the rotation arc groove.

[0008] Preferably, a semicircular reinforcement plate is installed on the outer surface of the rotating mounting head and the fixed mounting head, an arc-shaped groove is opened inside the semicircular reinforcement plate, and a mounting hole is opened at the front center position of the rotating mounting head and the fixed mounting head.

[0009] Preferably, the clamping pliers are of various types, and a mounting column adapted to the mounting hole is installed at the rear end center position of the clamping pliers, and an arc-shaped clamping block adapted to the arc-shaped clamping groove is installed at the rear end outer edge position of the clamping pliers.

[0010] Preferably, the upper front end of the secondary sleeve contacts the rear end of the fixed mounting head.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The telescopic and interchangeable head laparoscopic surgical instrument is squeezed inwardly by two handles, wherein the upper handle drives the squeezing plate to move, and the squeezing plate squeezes one end of the connecting rod inside the circular column to move downward, and the other end of the connecting rod is connected to the rotating mounting head through a secondary sleeve. When one end of the connecting rod moves downward, the secondary sleeve and the rotating mounting head at the other end of the connecting rod drive a clamping forceps to move upward in the opposite direction, and then contact with another clamping forceps at the front end of the fixed mounting head to complete the clamping effect. When the length needs to be reduced, the main sleeve can be rotated toward the rear end, and the main sleeve will drive the fixed mounting head and the rotating mounting head to move backward along the length direction of the extension rod, and the fixed mounting head and the rotating mounting head will drive the secondary sleeve to move synchronously, thereby reducing the length of the device. When using and placing the device, the length of the device can be changed according to environmental requirements, which will be more convenient to use.

[0013] 2. This retractable and interchangeable head laparoscopic surgical instrument has mounting holes at the front ends of the fixed mounting head and the rotating mounting head, and mounting columns are provided at the rear ends of the clamping forceps. The clamping forceps can be connected to the fixed mounting head and the rotating mounting head by snapping the mounting columns and the mounting holes. There are many types of clamping forceps, and the user can replace the type of clamping forceps at the front ends of the fixed mounting head and the rotating mounting head at any time according to usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the disassembly of the head structure of the utility model;

[0016] Figure 3 For this utility model Figure 1 A is a schematic diagram of the structure enlargement;

[0017] Figure 4This is a structural schematic diagram of the connection block of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the main sleeve and the secondary sleeve of the utility model.

[0019] In the figure: 1. Extension rod; 2. Main sleeve; 3. Fixed mounting head; 4. Rotating mounting head; 5. Semicircular reinforcement plate; 6. Clamping pliers; 7. Grip; 8. Mounting hole; 9. Arc-shaped slot; 10. Arc-shaped block; 11. Mounting column; 12. Support rod; 13. Circular column; 14. Extrusion plate; 15. Connecting block; 16. Rotating arc slot; 17. Connecting rod; 18. Rotating circular plate; 19. Secondary sleeve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] like Figures 1 to 5As shown, the telescopic and interchangeable head laparoscopic surgical instrument of this embodiment includes an extension rod 1, the interior of the extension rod 1 is a hollow structure, the front end of the extension rod 1 is threadedly connected to a main sleeve 2, the main sleeve 2 and the extension rod 1 are threadedly connected, and the overlapping length of the main sleeve 2 on the surface of the extension rod 1 can be changed by rotating the main sleeve 2, a fixed mounting head 3 is fixedly installed on the upper front end of the main sleeve 2, the fixed mounting head 3 and the main sleeve 2 are installed in an integrated manner and cannot change their position, and a rotating mounting head 4 is rotatably connected to the lower front end of the main sleeve 2, and there is a The rotating connection can be rotated within a certain angle. The front ends of the fixed mounting head 3 and the rotating mounting head 4 are both clamped with a clamping clamp 6. The clamping clamp 6 has a variety of different types. The clamping clamp 6 and the fixed mounting head 3 and the rotating mounting head 4 are all detachably connected. The rear end of the extension rod 1 is fixedly installed with a connecting block 15. A through hole is opened inside the connecting block 15. The front end of the through hole is connected to the extension rod 1. The upper and lower ends of the rear end of the connecting block 15 are rotatably connected with handles 7. The two handles 7 can be rotated within a certain angle. The center position of the rear end of the connecting block 15 is fixedly installed with a circular The ring column 13 is a hollow structure inside the circular column 13, and a connecting rod 17 is installed inside the circular column 13. The front end of the connecting rod 17 passes through the internal through hole of the connecting block 15 and the extension rod 1 and is slidably connected with a secondary sleeve 19. It should be noted that the rear end of the circular column 13 is a closed structure, and the connecting rod 17 does not contact the circular column 13. The connecting rod 17 passes through the internal through hole of the connecting block 15 and the extension rod 1 in turn, and the front end of the connecting rod 17 is slidably connected with the secondary sleeve 19. The secondary sleeve 19 can slide on the surface of the connecting rod 17, and the front end lower part of the secondary sleeve 19 is connected to the rotating mounting head 4. The upper handle 7 is connected, and an extrusion plate 14 is installed at the lower end of the upper handle 7. The extrusion plate 14 passes through the circular column 13 and is connected to the upper end of the connecting rod 17. The two handles 7 are squeezed inward, and the upper handle 7 will drive the extrusion plate 14 to move. The extrusion plate 14 will squeeze the connecting rod 17 inside the circular column 13 to move downward. The other end of the connecting rod 17 is connected to the rotating mounting head 4 through the secondary sleeve 19. When one end of the connecting rod 17 moves downward, the rotating mounting head 4 will drive the clamping clamp 6 to move upward and contact the clamping clamp 6 at the front end of the fixed mounting head 3 to complete the clamping effect.

[0023] Specifically, the upper and lower ends of the rear end of the circular column 13 are rotatably connected with support rods 12, and the two support rods 12 are respectively connected to the inner walls of the two handles 7. A torsion spring is provided at the connection between the support rods 12 and the circular column 13. The two support rods 12 are respectively in contact with the inner walls of the two handles 7, thereby connecting the handles 7 and the circular column 13. Under the action of the torsion spring, when there is no external force, the position of the support rod 12 will not change. By using the support rod 12 and the torsion spring in combination, the initial position of the handle 7 can be limited, and the handle 7 can be prevented from rotating to a large extent.

[0024] Furthermore, a rotating arc groove 16 is provided at both upper and lower ends of the rear end of the connecting block 15, and a rotating circular plate 18 is installed at the front end of the handle 7. The rotating circular plate 18 is rotatably connected to the inside of the rotating arc groove 16, and the rotating circular plate 18 is rotatably connected to the inside of the rotating arc groove 16, so that the handle 7 can rotate around the center position of the rotating circular plate 18.

[0025] Furthermore, a semicircular reinforcement plate 5 is installed on the outer surface of the rotating mounting head 4 and the fixed mounting head 3, and an arc-shaped card slot 9 is opened inside the semicircular reinforcement plate 5. A mounting hole 8 is opened at the front center position of the rotating mounting head 4 and the fixed mounting head 3. The clamping clamp 6 has various types. A mounting column 11 adapted to the mounting hole 8 is installed at the rear center position of the clamping clamp 6, and an arc-shaped card block 10 adapted to the arc-shaped card slot 9 is installed at the outer edge position of the rear end of the clamping clamp 6. The mounting hole 8 and the rear end of the clamping clamp 6 are provided with a mounting column 11. The clamping clamp 6 can be connected to the fixed mounting head 3 and the rotating mounting head 4 by clamping the mounting column 11 and the mounting hole 8. There are many types of clamping clamps 6. The user can replace the type of clamping clamp 6 at any time at the front end of the fixed mounting head 3 and the rotating mounting head 4 according to the use requirements, and then the arc-shaped clamping block 10 and the arc-shaped clamping groove 9 are used in coordination with each other to enhance the connection strength between the clamping clamp 6 and the fixed mounting head 3 and the rotating mounting head 4, thereby reducing the probability of accidental falling of the clamping clamp 6.

[0026] Furthermore, the upper front end of the secondary sleeve 19 contacts the rear end of the fixed mounting head 3, and the fixed mounting head 3 and the secondary sleeve 19 are only in contact but not connected. The front end of the secondary sleeve 19 is connected to the rotating mounting head 4 and will move synchronously with the rotating mounting head 4, and there is no direct interaction relationship between the secondary sleeve 19 and the fixed mounting head 3.

[0027] The method of using this embodiment is: squeeze inward through the two handles 7, wherein the upper handle 7 will drive the squeezing plate 14 to move, and the squeezing plate 14 will squeeze the connecting rod 17 inside the circular column 13 to move downward, and the other end of the connecting rod 17 is connected to the rotating mounting head 4 through the secondary sleeve 19. When one end of the connecting rod 17 moves downward, the secondary sleeve 19 at the other end of the connecting rod 17 and the rotating mounting head 4 will drive a clamping clamp 6 to move upward in the opposite direction, and then contact with another clamping clamp 6 at the front end of the fixed mounting head 3 to complete the clamping effect. When the length needs to be reduced, the main sleeve 2 can be rotated toward the rear end, and the main sleeve 2 will drive the fixed mounting head 3 and the rotating mounting head 4 to move backward along the length direction of the extension rod 1, and the fixed mounting head 3 and the rotating mounting head 4 will drive the secondary sleeve 19 to move synchronously, thereby reducing the length of the device. When using and placing the device, the length of the device can be changed according to environmental requirements, which will be more convenient to use.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A retractable and replaceable head laparoscopic surgical instrument, comprising an extension rod (1), characterized in that: The front end of the extension rod (1) is threadedly connected to a main sleeve (2); a fixed mounting head (3) is fixedly mounted on the upper front end of the main sleeve (2); a rotating mounting head (4) is rotatably connected to the lower front end of the main sleeve (2); the front ends of the fixed mounting head (3) and the rotating mounting head (4) are both clamped with clamps (6); a connecting block (15) is fixedly mounted on the rear end of the extension rod (1); upper and lower ends of the rear end of the connecting block (15) are rotatably connected to handles (7); the rear end of the connecting block (15) is A circular column (13) is fixedly installed at the center position of the end, and a connecting rod (17) is installed inside the circular column (13). The front end of the connecting rod (17) passes through the internal through hole of the connecting block (15) and the extension rod (1) and is slidably connected to a secondary sleeve (19). The lower front end of the secondary sleeve (19) is connected to the rotating mounting head (4). An extrusion plate (14) is installed at the lower end of the handle (7) above, and the extrusion plate (14) passes through the circular column (13) and is connected to the upper end of the connecting rod (17).

2. The retractable and replaceable head laparoscopic surgical instrument according to claim 1, characterized in that: The upper and lower ends of the rear end of the circular column (13) are rotatably connected to support rods (12), the two support rods (12) are respectively connected to the inner walls of the two handles (7), and a torsion spring is provided at the connection between the support rod (12) and the circular column (13).

3. The retractable and replaceable head laparoscopic surgical instrument according to claim 1, characterized in that: The upper and lower ends of the rear end of the connection block (15) are each provided with a rotation arc groove (16), and the front end of the handle (7) is provided with a rotation circular plate (18), and the rotation circular plate (18) is rotationally connected inside the rotation arc groove (16).

4. The retractable and replaceable head laparoscopic surgical instrument according to claim 1, characterized in that: A semicircular reinforcement plate (5) is installed on the outer surface of the rotating mounting head (4) and the fixed mounting head (3), an arc-shaped groove (9) is provided inside the semicircular reinforcement plate (5), and a mounting hole (8) is provided at the front end center position of the rotating mounting head (4) and the fixed mounting head (3).

5. The retractable and replaceable head laparoscopic surgical instrument according to claim 4, characterized in that: The clamping pliers (6) are of various types. A mounting column (11) adapted to the mounting hole (8) is installed at the rear center position of the clamping pliers (6), and an arc-shaped clamping block (10) adapted to the arc-shaped clamping groove (9) is installed at the rear outer edge position of the clamping pliers (6).

6. The retractable and replaceable head laparoscopic surgical instrument according to claim 1, characterized in that: The upper front end of the secondary sleeve (19) contacts the rear end of the fixed mounting head (3).

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