Biopsy forceps matched with sampling device

Abstract

The utility model discloses a pair of biopsy forceps adaptive to a sampling device, which comprises an outer sheath tube, two ends of the outer sheath tube are respectively and fixedly connected with a cylinder body and a limiting sleeve, the end face of the limiting sleeve is provided with a driving wire in a penetrating manner, one end, positioned in the outer sheath tube, of the driving wire is fixedly sleeved with a threaded rod, and the front end of the cylinder body is provided with a pair of sampling forceps. A push rod penetrates through the front end surface of the cylinder body in a sliding manner and is in transmission connection with the sampling pliers; in the sampling process, the push-and-pull module drives the driving wire to slide in the outer sheath tube, the connecting column can be pushed and pulled, so that the push rod drives the sampling pliers to open and close to facilitate sampling and complete sampling, and after the outer sheath tube is coiled into the sampling device shell, the rotating module drives the rotating terminal to rotate, so that the sampling efficiency is improved. The threaded rod can be driven to rotate through the driving wire, so that the threaded rod is in threaded fit with the connecting column to drive the connecting column to drive the push rod to move, the sampling pliers are opened and closed under the condition that the driving wire is not pushed and pulled, and a sample is conveniently taken out.

Description

Technical Field

[0001] The utility model belongs to the field of medical instruments and relates to a digestive tract surgical instrument under a medical endoscope, in particular to a biopsy forceps adapted to a sampling device. Background Art

[0002] Due to the small trauma, small amount of bleeding and low incidence of complications, the diagnosis and treatment with soft endoscopes and surgical instruments has become the mainstream method. Endoscopic biopsy is one of the most common procedures. The endoscopist manipulates the digestive endoscope for diagnosis. After finding the corresponding lesion, the nurse will hold the biopsy forceps to assist the doctor in intervening from the forceps channel of the digestive endoscope and assist the doctor in completing the endoscopic target biopsy. After the biopsy is completed, the nurse removes the biopsy forceps from the forceps channel, opens the jaws, and places the biopsy tissue in the tissue sampling bottle.

[0003] The conventional surgical biopsy forceps are divided into an outer sheath and a driving wire, and the distal end of the outer sheath is provided with a forceps head structure. During use, the distal jaws are opened and closed by pulling the driving wire at the proximal end.

[0004] During robotic surgery, the tissue sampling process is fully automatic. Due to the conveying principle of robotic surgical instruments, when the instrument is retracted, the outer sheath is coiled and stored in the sampling device housing 21. Due to the small storage diameter, the drive wire and the outer sheath will fit each other, which will cause increased friction, making it difficult to open the jaws, resulting in failure in tissue sampling. For this reason, we propose a biopsy forceps that is adapted to the sampling device. Utility Model Content

[0005] The purpose of the utility model is to provide a biopsy forceps adapted to a sampling device to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A biopsy forceps adapted to a sampling device comprises an outer sheath, wherein the two ends of the outer sheath are respectively fixedly connected with a barrel and a limiting sleeve, a driving wire is passed through the end surface of the limiting sleeve, and one end of the driving wire located in the outer sheath is fixedly sleeved with a threaded rod, a sampling forceps is installed at the front end of the barrel, a push rod is slidably passed through the front end surface of the barrel, and the push rod is transmission-connected to the sampling forceps, and one end of the push rod located in the outer sheath is fixedly connected with a connecting column, and the connecting column is threadedly connected to the threaded rod.

[0008] As a further solution of the utility model: the front end surface of the cylinder is symmetrically fixedly connected to two connecting seats, the push rod is located between the two connecting seats, the sampling forceps include two symmetrically arranged forceps cups, one end of the forceps cups is fixedly connected to a first connecting rod, and the two first connecting rods are rotatably installed between the two connecting seats through a first pin shaft, the first connecting rods are rotatably sleeved on the first pin shaft, the ends of the two first connecting rods away from the forceps cups are rotatably connected to the second connecting rod through the second pin shaft, the end of the push rod located outside the cylinder body is fixedly penetrated by a third pin shaft, and the ends of the two second connecting rods away from the second pin shaft are respectively rotatably sleeved at the two ends of the third pin shaft.

[0009] As a further solution of the utility model: the end face of the threaded rod away from the push rod is provided with a trapezoidal internal thread, the threaded rod is provided with a trapezoidal external thread adapted to the trapezoidal internal thread, the threaded rod is located inside the trapezoidal internal thread, the open end of the connecting column is fixedly connected to a limiting ring, and the inner diameter of the limiting ring is smaller than the outer diameter of the threaded rod.

[0010] As a further solution of the utility model: the outer wall of the driving wire located outside the limiting sleeve is fixedly sleeved with a rotating terminal and a driving terminal.

[0011] As a further solution of the utility model: a spring tube is fixedly connected inside the outer sheath tube, the connecting column is located inside the spring tube, an inner lining tube is arranged inside the spring tube, and the inner lining tube is located between the push rod and the limiting sleeve, and the driving wire passes through the inner lining tube.

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

[0013] During the sampling process, the utility model drives the driving wire to slide in the outer sheath tube through the push-pull module, and can push and pull the connecting column, so as to drive the sampling clamp to open and close through the push rod, so as to facilitate sampling. After the outer sheath tube is coiled and put into the sampling device housing, the rotating terminal is driven to rotate through the rotating module, and the threaded rod can be driven to rotate through the driving wire, so that the threaded rod is driven to rotate by the thread cooperation between the threaded rod and the connecting column to drive the pushing rod to move, so as to realize the opening and closing of the sampling clamp without pushing and pulling the driving wire, so as to facilitate the removal of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a schematic diagram of the structure of a biopsy forceps adapted for a sampling device.

[0015] Figure 2 An exploded view of a biopsy forceps adapted for a sampling device.

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0017] Figure 4 A partial cross-sectional view of a biopsy forceps adapted for a sampling device.

[0018] Figure 5 The present invention is a schematic diagram of the installation position of a biopsy forceps adapted to a sampling device on the sampling device.

[0019] Figure 6 Schematic diagram of the internal structure of the sampling device.

[0020] Among them, the cylinder 1, the connecting seat 2, the clamp cup 3, the first connecting rod 4, the first pin 5, the second pin 6, the second connecting rod 7, the third pin 8, the push rod 9, the connecting column 10, the trapezoidal internal thread 11, the threaded rod 12, the drive wire 13, the limit ring 14, the outer sheath 15, the spring tube 16, the inner liner 17, the limit sleeve 18, the rotating terminal 19, the drive terminal 20, the sampling device housing 21, the push-pull module 22, and the rotating module 23. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail in conjunction with the embodiments below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship 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 operated in a specific orientation in the specification, and therefore cannot be understood as a limitation on the present invention.

[0024] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0025] See also Figures 1 to 6In an embodiment of the utility model, a biopsy forceps adapted to a sampling device comprises an outer sheath tube 15, wherein both ends of the outer sheath tube 15 are fixedly connected with a barrel 1 and a limiting sleeve 18 respectively, and a driving wire 13 is passed through the end surface of the limiting sleeve 18, and one end of the driving wire 13 located in the outer sheath tube 15 is fixedly sleeved with a threaded rod 12, and a sampling forceps is installed at the front end of the barrel 1, and a push rod 9 is slidably passed through the front end surface of the barrel 1, and the push rod 9 is transmission-connected with the sampling forceps, and one end of the push rod 9 located in the outer sheath tube 15 is fixedly connected with a connecting column 10, and the connecting column 10 is threadedly connected with the threaded rod 12, and the outer wall of the driving wire 13 located outside the limiting sleeve 18 is fixedly sleeved with a rotating terminal 19 and a driving terminal 20, wherein the rotating terminal 19 is connected with a rotating module 23 of the sampling device, and the driving terminal 20 is connected with a push-pull module 22 of the sampling device. Since the sampling device has been patented and is not the focus of this case, it will not be described in detail.

[0026] The utility model adopts the above-mentioned scheme. During the sampling process, the push-pull module 22 drives the driving wire 13 to slide in the outer sheath 15, so that the connecting column 10 can be pushed and pulled, so that the sampling clamp is driven to open and close by the push rod 9, so as to facilitate sampling. After the outer sheath 15 is received into the sampling device housing 21, the rotating terminal 19 is driven to rotate by the rotating module 23, so that the threaded rod 12 can be driven to rotate by the driving wire 13, so that the threaded rod 12 and the connecting column 10 are matched to drive the connecting column 10 to drive the push rod 9 to move, so as to realize the opening and closing of the sampling clamp without pushing and pulling the driving wire 13, so as to facilitate the removal of the sample.

[0027] Specific combination Figure 2 , Figure 3 In one embodiment of the utility model, the front end surface of the cylinder 1 is symmetrically fixedly connected with two connecting seats 2, the push rod 9 is located between the two connecting seats 2, the sampling forceps includes two symmetrically arranged clamp cups 3, one end of the clamp cups 3 is fixedly connected with a first connecting rod 4, and the two first connecting rods 4 are rotatably installed between the two connecting seats 2 through a first pin shaft 5, the first connecting rods 4 are rotatably sleeved on the first pin shaft 5, and the ends of the two first connecting rods 4 away from the clamp cup 3 are rotatably connected to the second connecting rod 7 through a second pin shaft 6, the end of the push rod 9 located outside the cylinder 1 is fixedly penetrated with a third pin shaft 8, and the ends of the two second connecting rods 7 away from the second pin shaft 6 are rotatably sleeved at the two ends of the third pin shaft 8 respectively.

[0028] By sliding the push rod 9 on the cylinder 1, the two first connecting rods 4 can be driven to rotate on the first pin 5 through the second connecting rod 7, so as to drive the two clamp cups 3 to move in opposite directions at the same time, thereby realizing the opening and closing of the sampling clamp. The structure is simple and the operation is stable.

[0029] Specific combination Figure 4In one embodiment of the utility model, a trapezoidal internal thread 11 is provided on the end face of the threaded rod 12 away from the push rod 9, and a trapezoidal external thread matching the trapezoidal internal thread 11 is provided on the threaded rod 12. The threaded rod 12 is located in the trapezoidal internal thread 11, and the open end of the connecting column 10 is fixedly connected to a limiting ring 14, and the inner diameter of the limiting ring 14 is smaller than the outer diameter of the threaded rod 12.

[0030] The limiting ring 14 can prevent the threaded rod 12 from falling out of the open end of the connecting column 10 .

[0031] Specific combination Figure 4 In one embodiment of the utility model, a spring tube 16 is fixedly connected to the outer sheath tube 15, the connecting column 10 is located in the spring tube 16, an inner lining tube 17 made of polytetrafluoroethylene is provided in the spring tube 16, and the inner lining tube 17 is located between the push rod 9 and the limit sleeve 18, and the driving wire 13 passes through the inner lining tube 17.

[0032] The spring tube 16 can provide internal support for the outer sheath 15, thereby preventing the outer sheath 15 from being bent at a large angle. The inner lining tube 17 can guide the drive wire 13, thereby preventing the drive wire 13 from directly fitting against the inner wall of the spring tube 16 and lubricating the movement of the drive wire 13 in the outer sheath 15.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A biopsy forceps adapted for a sampling device, characterized in that: The invention comprises an outer sheath tube (15), the two ends of which are respectively fixedly connected with a barrel (1) and a limiting sleeve (18), the end surface of the limiting sleeve (18) is provided with a driving wire (13), one end of the driving wire (13) located in the outer sheath tube (15) is fixedly sleeved with a threaded rod (12), a sampling forceps is installed at the front end of the barrel (1), a push rod (9) is slidably provided on the front end surface of the barrel (1), and the push rod (9) is transmission-connected with the sampling forceps, one end of the push rod (9) located in the outer sheath tube (15) is fixedly connected with a connecting column (10), and the connecting column (10) is threadedly connected with the threaded rod (12).

2. A biopsy forceps adapted for a sampling device according to claim 1, characterized in that: The front end of the cylinder (1) is symmetrically and fixedly connected to two connecting seats (2), the push rod (9) is located between the two connecting seats (2), the sampling forceps comprises two symmetrically arranged clamp cups (3), one end of each of the clamp cups (3) is fixedly connected to a first connecting rod (4), and the two first connecting rods (4) are rotatably mounted between the two connecting seats (2) via a first pin shaft (5), the first connecting rods (4) are rotatably sleeved on the first pin shaft (5), the ends of the two first connecting rods (4) away from the clamp cup (3) are rotatably connected to a second connecting rod (7) via a second pin shaft (6), the end of the push rod (9) located outside the cylinder (1) is fixedly penetrated by a third pin shaft (8), and the ends of the two second connecting rods (7) away from the second pin shaft (6) are rotatably sleeved at the two ends of the third pin shaft (8).

3. The biopsy forceps adapted for sampling device according to claim 1, characterized in that: The end surface of the threaded rod (12) away from the push rod (9) is provided with a trapezoidal internal thread (11), and the threaded rod (12) is provided with a trapezoidal external thread that matches the trapezoidal internal thread (11). The threaded rod (12) is located in the trapezoidal internal thread (11), and the open end of the connecting column (10) is fixedly connected to a limiting ring (14), and the inner diameter of the limiting ring (14) is smaller than the outer diameter of the threaded rod (12).

4. The biopsy forceps adapted for a sampling device according to claim 1, characterized in that: The outer wall of the driving wire (13) located outside the limiting sleeve (18) is fixedly sleeved with a rotating terminal (19) and a driving terminal (20).

5. The biopsy forceps adapted for a sampling device according to claim 1, characterized in that: A spring tube (16) is fixedly connected to the outer sheath tube (15), the connecting column (10) is located in the spring tube (16), an inner lining tube (17) is provided in the spring tube (16), and the inner lining tube (17) is located between the push rod (9) and the limiting sleeve (18), and the driving wire (13) passes through the inner lining tube (17).

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