Novel foreign body forceps for digestive endoscopy

Abstract

The utility model discloses a pair of novel foreign body forceps for a digestive endoscopy, which comprises a fixed cylinder, a hinge rod assembly, a connecting rod assembly, a pull rod, an alligator tooth forceps and a quick tool changing assembly, the hinge rod assembly is positioned at one end of the fixed cylinder and is hinged to the end part of the fixed cylinder, and the hinge rod assembly is connected with the connecting rod assembly; the connecting rod assembly is located on one side of the hinge rod assembly and arranged in the fixing cylinder, the other end of the connecting rod assembly is hinged to the pull rod, the pull rod is located on one side of the connecting rod assembly and arranged in the fixing cylinder in a sliding mode, and the alligator tooth clamp is located at the other end of the hinge rod assembly and fixedly connected to the hinge rod assembly. The quick knife changing assembly is arranged on one side of the alligator tooth forceps and fixedly connected to the alligator tooth forceps, and after a foreign body transversely arranged on the esophageal wall of a patient is cut off through the shear blades, the foreign body is changed into two sections of separated foreign bodies from one transverse foreign body, and then the two sections of foreign bodies can be taken out from the esophageal wall of the patient in sequence through the alligator tooth forceps. Foreign matters are prevented from puncturing blood vessels near the esophageal wall, and the possibility of massive hemorrhage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a novel foreign body forceps for digestive endoscopy. Background Art

[0002] Foreign bodies in the esophagus are a common problem in the gastroenterology department. Currently, in clinical practice, foreign bodies are mainly removed by using foreign body forceps under endoscopy and taken out of the body through the mouth. Some foreign bodies have one end embedded in the esophageal wall and the other end free in the esophageal cavity. This type of foreign body is easy to remove. Just use the foreign body forceps to clamp the free end, pull the foreign body out of the esophageal wall, and then take it out of the mouth.

[0003] Chinese patent publication number CN213722323U discloses a similar endoscopic foreign body forceps that can be controlled in multiple directions, including a first outer tube, one end of the first outer tube is connected to the second outer tube through a rotating device, a pull rod is coaxially arranged inside the first outer tube and the second outer tube, one end of the second outer tube is symmetrically provided with a side plate, two clamp bodies are rotatably connected between the two side plates, the other ends of the two clamp bodies are rotatably connected to the pull rod through a rotating rod, the other end of the pull rod extends to the outside of the first outer tube, the other end of the pull rod is connected to a pull ring, the rotating device includes a rotating seat, the outer wall of the rotating seat is connected to a camera device, and the adjacent ends of the first outer tube and the second outer tube are respectively A second annular seat and a first annular seat are connected, and the rotating seat is rotatably connected between the second annular seat and the first annular seat. The second annular seat, the first annular seat and the rotating seat are coaxially arranged, and a thread is arranged on the inner wall of the rotating seat. An inner tube is coaxially arranged on the outer wall of the pull rod, and a threaded section is arranged on the side of the inner tube close to the second outer tube. The threaded section is threadedly connected to the rotating seat, and a second vertical plate is symmetrically arranged on the outer wall of the other end of the inner tube, and a strip through groove is arranged at the corresponding position of the first outer tube. One end of the second vertical plate passes through the strip through groove to the outside of the first outer tube, and an annular pull plate is coaxially arranged on the outside of the first outer tube, and one end of the two second vertical plates are connected to the inner wall of the annular pull plate.

[0004] However, when using the above device to remove foreign bodies with both ends inserted into the esophageal wall, it is necessary to use foreign body forceps to further insert the foreign body to one end so that the foreign body at the other end is separated from the esophageal wall, and then the foreign body is removed from the inside of the esophagus, which undoubtedly aggravates the damage to the esophagus. If the foreign body is correctly embedded in the middle section of the esophagus, which is close to the large blood vessels, this method of removing the foreign body may puncture the blood vessels near the esophageal wall and cause heavy bleeding. Therefore, a better solution is urgently needed clinically to deal with transverse foreign bodies with both ends inserted into the esophageal wall. Utility Model Content

[0005] The problem to be solved by the utility model is to overcome the disadvantage of the prior art that when removing a foreign body with both ends inserted into the esophageal wall, it is necessary to use a foreign body forceps to further insert the foreign body to one end so that the foreign body at the other end is separated from the esophageal wall, and then the foreign body is removed from the inside of the esophagus, which undoubtedly aggravates the damage to the esophagus. If the foreign body is correctly embedded in the middle section of the esophagus, which is close to a large blood vessel, this method of removing the foreign body may puncture the blood vessels near the esophageal wall, causing heavy bleeding.

[0006] A novel foreign body forceps for digestive endoscopy is proposed, comprising a fixed cylinder, a hinged rod assembly for closing a blade and an alligator tooth forceps, a connecting rod assembly for driving the hinged rod assembly to close, a pull rod for pulling the connecting rod assembly, an alligator tooth forceps for clamping foreign bodies and a quick knife change assembly for quickly changing blades, wherein the hinged rod assembly is located at one end of the fixed cylinder and is hinged at the end of the fixed cylinder, and the hinged rod assembly is connected to the connecting rod assembly, the connecting rod assembly is located at one side of the hinged rod assembly and is arranged inside the fixed cylinder, and the other end of the connecting rod assembly is hinged on the pull rod, the pull rod is located at one side of the connecting rod assembly and is slidably arranged inside the fixed cylinder, the alligator tooth forceps is located at the other end of the hinged rod assembly and is fixedly connected to the hinged rod assembly, and the quick knife change assembly is arranged at one side of the alligator tooth forceps and is fixedly connected to the alligator tooth forceps.

[0007] In the technical solution of the utility model, after the crocodile forceps and the shearing blade are placed into the patient's esophagus through the fixed tube and close to the foreign body, the pull rod can be moved downward, and the pull rod can be opened through the connecting rod and the hinged rod during the downward movement, and the hinged rod can be moved toward the foreign body again after opening, until the foreign body is parallel to the shearing blade, and the pull rod can be pulled upward, and in the process of the pull rod moving upward, the hinged rod assembly will be merged under the drive of the connecting rod assembly, and at the same time as the hinged rod assembly is merged, the shearing blade will cut off the foreign body, and then The foreign body cut into two pieces can be clamped using crocodile tooth forceps to solve the problem mentioned in the technical background that when removing foreign bodies with both ends inserted into the esophageal wall, it is necessary to use foreign body forceps to further insert the foreign body to one end so that the foreign body at the other end is separated from the esophageal wall, and then the foreign body is removed from the inside of the esophagus. This will undoubtedly aggravate the damage to the esophagus. If the foreign body is correctly embedded in the middle section of the esophagus, which is close to the large blood vessels, this method of removing the foreign body may puncture the blood vessels near the esophageal wall and cause heavy bleeding.

[0008] Preferably, the articulated rod assembly includes a first articulated rod, a second articulated rod and a first articulated shaft, the first articulated rod and the second articulated rod are cross-arranged in an "X" shape at one end of the fixed tube, the first articulated shaft is vertically arranged at the overlapping point of the first articulated rod and the second articulated rod and is hinged at the end of the fixed tube, one end of the first articulated rod and the second articulated rod are connected with crocodile tooth clamps, the other ends of the first articulated rod and the second articulated rod are connected to the connecting rod assembly, the crocodile tooth clamps are fixedly connected to the articulated rod assembly by screws, and the crocodile tooth clamps are in direct contact with foreign objects, so when the crocodile tooth clamps need to be replaced, the crocodile tooth clamps can be directly removed without replacing the entire articulated rod assembly.

[0009] Preferably, the connecting rod assembly includes a first connecting rod, a second connecting rod and a second hinge shaft, one end of the first connecting rod is connected to the first hinge rod, one end of the second connecting rod is connected to the second hinge rod, and the other ends of the first connecting rod and the second connecting rod are hinged on the second hinge shaft, the second hinge shaft is arranged at one end of the pull rod and hinged on the pull rod, one end of the connecting rod assembly is hinged to the pull rod assembly, and the other end is hinged to the hinge rod assembly, so that when the pull rod slides up and down inside the fixed cylinder, the hinge rod assembly can be opened or closed by the pull rod assembly, without the need to manually open or close the hinge rod assembly.

[0010] Preferably, the crocodile tooth pliers include a pliers head, a cover plate, a first spring and a pressure rod, the cover plate is arranged above the pliers head and clamped on the pliers head, a groove is opened inside the pliers head, two groups of first springs are arranged inside the groove and located at both ends of the groove, two groups of pressure rods are arranged inside the groove for vertical sliding, and the two groups of pressure rods are respectively located on both sides of the quick tool change assembly, when the quick tool change assembly needs to be replaced, it is only necessary to squeeze the two groups of pressure rods at the same time, and the stopper can be pressed into the shell by the pressure rod to replace it, and after the shell is taken out, the second spring of the pressure rod is released to pull the pressure rod back to its original position to prevent the pressure rod from blocking the stopper.

[0011] The preferred technical solution of the utility model is that the quick tool change assembly includes a shearing blade, a block, a second spring, a guide rod, a shell and a baffle. The shearing blade is located on one side of the shell and fixedly connected to the inside of the shell, the guide rod is located on the other side of the shell and connected to the shell, there are two groups of blocks respectively arranged at both ends of the guide rod and slidably connected to the inside of the shell, and one side of the two groups of blocks is provided with a second spring, and the two groups of second springs are both sleeved on the guide rod, and the baffle is located on one side of the block and clamped on the shell. During installation, the gear rod will fix the shell together with the shearing blade on the crocodile tooth pliers. Therefore, when the shearing blade needs to be replaced, after pressing the gear rod into the inside of the shell, the shell and the shearing blade can be fixed together in the inside of the crocodile tooth pliers again, and the operation is simple and effective.

[0012] Preferably, a handle is provided on the fixing tube, and the cross section of the handle is in the shape of an I. When the fixing tube is placed into the patient's esophagus, the handle can be held to fix the fixing tube to avoid the fixing tube from falling suddenly due to hand slippage.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model does not need to use foreign body forceps to further insert one end of the foreign body into the esophageal wall of the patient laterally when the foreign body is stuck in the esophageal wall of the patient so as to separate the other end of the foreign body from the esophageal wall and then use the foreign body forceps to take out the foreign body from the inside of the esophageal wall. Instead, the cutting blade is combined with the foreign body forceps, and the cutting blade on the crocodile tooth forceps is used to cut the foreign body lying on the esophageal wall of the patient, so that the foreign body is changed from one transverse foreign body to two separated foreign bodies. Then, the two foreign bodies can be taken out from the esophageal wall of the patient one after another by the crocodile tooth forceps, thereby avoiding the possibility of the foreign body piercing the blood vessels near the esophageal wall and causing heavy bleeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a new type of foreign body forceps for digestive endoscopy in the closed state;

[0016] Figure 2 This is a schematic diagram of a new type of foreign body forceps for digestive endoscopy in the open state;

[0017] Figure 3 A schematic diagram of the internal structure of a new type of foreign body forceps for digestive endoscopy (the fixed tube is a whole, and a piece is removed to show the internal structure.);

[0018] Figure 4 It is a schematic diagram of the structural coordination of a hinged rod and crocodile tooth forceps of a new type of foreign body forceps for digestive endoscopy;

[0019] Figure 5 It is a schematic diagram of the structure of a new type of crocodile tooth forceps for foreign body forceps used in digestive endoscopy;

[0020] Figure 6 A schematic diagram of the internal structure of a new type of crocodile tooth forceps for foreign body forceps used in digestive endoscopy;

[0021] Figure 7 It is a schematic diagram of the structure of a new type of quick-change blade assembly for foreign body forceps used in digestive endoscopy;

[0022] Figure 8 A schematic diagram of the internal structure of a new type of quick-change blade assembly for foreign body forceps used in digestive endoscopy (the shell is a whole, and a piece is removed to show the internal structure.);

[0023] In the figure: 1-fixed cylinder, 2-articulated rod assembly, 21-first articulated rod, 22-second articulated rod, 23-first articulated shaft, 3-connecting rod assembly, 31-first connecting rod, 32-second connecting rod, 33-second articulated shaft, 4-pull rod, 5-crocodile tooth pliers, 51-pliers head, 52-cover plate, 53-first spring, 54-pressure rod, 6-quick tool change assembly, 61-cutting blade, 62-block, 63-second spring, 64-guide rod, 65-housing, 66-baffle. DETAILED DESCRIPTION

[0024] The following will be combined with the attached embodiment of the utility model Figure 1-8 , the technical solutions in the embodiments of the utility model are described in detail.

[0025] like Figure 1 As shown, a novel foreign body forceps for digestive endoscopy includes a fixed tube 1, a hinged rod assembly 2 for closing a blade and a crocodile tooth forceps 5, a connecting rod assembly 3 for driving the hinged rod assembly 2 to close, a pull rod 4 for pulling the connecting rod assembly 3, a crocodile tooth forceps 5 for clamping foreign bodies and a quick blade changing assembly 6 for quickly replacing blades. The hinged rod assembly 2 is arranged at one end of the fixed tube 1 according to the axial direction of the fixed tube 1 and is arranged at the axial position of the fixed tube 1, and the hinged rod assembly 2 is hinged at the end of the fixed tube 1.

[0026] like Figure 1 As shown, the connecting rod assembly 3 is arranged at one end of the fixed cylinder 1 and at the axial position of the fixed cylinder 1 according to the axial direction of the fixed cylinder, and the connecting rod assembly 3 is located on one side of the hinged rod assembly 2, one end of the hinged rod assembly 2 is hinged to the connecting rod assembly 3, and the other end of the connecting rod assembly 3 is hinged to the pull rod 4, so when the pull rod 4 moves, it will synchronously drive the connecting rod assembly 3 to move, and when the connecting rod assembly 3 moves, it will synchronously drive the hinged rod assembly 2 to move, and the pull rod 4 is arranged on the other side of the connecting rod assembly 3 according to the axial direction of the fixed cylinder 1.

[0027] like Figure 1 As shown, the pull rod 4 is slidably arranged inside the fixed cylinder 1, one end of the articulated rod assembly 2 is hinged to the connecting rod assembly 3, and the other end of the articulated rod assembly 2 is provided with a crocodile tooth clamp 5, which is located on one side of the articulated rod assembly 2 and is fixedly connected to the articulated rod assembly 2 with screws. Therefore, when the articulated rod assembly 2 moves, the articulated rod assembly 2 will synchronously drive the crocodile teeth to move synchronously, and the quick tool change assembly 6 is arranged on one side of the crocodile tooth clamp 5 according to the length direction of the crocodile tooth clamp 5, and the quick tool change assembly 6 is clamped inside the crocodile tooth clamp 5.

[0028] like Figure 2-3As shown, the articulated rod assembly 2 includes a first articulated rod 21, a second articulated rod 22 and a first articulated shaft 23. The first articulated rod 21 is located above the second articulated rod 22, so the first articulated rod 21 and the second articulated rod 22 are cross-arranged in an "X" shape at one end of the fixed cylinder 1. The first articulated shaft 23 is vertically arranged at the overlapping point of the first articulated rod 21 and the second articulated rod 22. The first articulated shaft 23 is located at the end of the fixed cylinder 1 and the angle between the axis of the first articulated shaft 23 and the axis of the fixed cylinder 1 is 90 degrees. The first articulated shaft 23 is fixedly connected to the end of the fixed cylinder 1 by screws.

[0029] like Figure 2-3 As shown, the first hinged rod 21 and the second hinged rod 22 are both hinged on the first hinge shaft 23, so the first hinged rod 21 and the second hinged rod 22 can be opened and closed with the axis of the first hinge shaft 23 as the center, one end of the first hinged rod 21 and the second hinged rod 22 are connected to the connecting rod assembly 3, and the other ends of the first hinged rod 21 and the second hinged rod 22 are fixedly connected with the crocodile tooth clamp 5, so when one end of the first hinged rod 21 and the second hinged rod 22 is opened or closed, the crocodile tooth clamp 5 will be driven to open or close synchronously.

[0030] like Figure 2-3 As shown, the connecting rod assembly 3 includes a first connecting rod 31, a second connecting rod 32 and a second hinge shaft 33. The second hinge shaft 33 is arranged at one end of the pull rod 4, and the angle between the axis of the second hinge shaft 33 and the axis of the pull rod 4 is 90 degrees, and the second hinge shaft 33 is fixedly bonded to the pull rod 4, one end of the first connecting rod 31 is connected to the second hinge shaft 33, and the other end of the first connecting rod 31 is hinged to the first hinge rod 21, and one end of the second connecting rod 32 is connected to the second hinge shaft 33, and the other end of the second connecting rod 32 is hinged to the second hinge rod 22.

[0031] like Figure 2-3 As shown, when the pull rod 4 slides downward inside the fixed cylinder 1, the ends of the first pull rod 4 and the second pull rod 4 hinged to the second hinge shaft 33 will move downward synchronously, and the other ends of the first pull rod 4 and the second pull rod 4 will be synchronously separated to both sides and move laterally. While the first pull rod 4 and the second pull rod 4 are separated and moved laterally to both sides, the ends of the first hinged rod 21 and the second hinged rod 22 hinged to the first pull rod 4 and the second pull rod 4 will be synchronously opened outward, and the other ends of the first hinged rod 21 and the second hinged rod 22 will also be separated at this time. At this time, the hinged rod assembly 2 is in an open state. Similarly, when the pull rod 4 moves upward, the hinged rod assembly 2 can be closed by the connecting rod assembly 3. At this time, the hinged rod assembly 2 is in a closed state.

[0032] like Figure 2-3As shown, a handle 11 is sleeved on the fixed tube 1, and the cross section of the handle 11 is in the shape of an "I". The handle 11 is bonded to the outer wall of the fixed tube 1. When the fixed tube 1 is placed inside the patient's esophagus and the shear blade 61 of the quick-change knife assembly is driven by the hinged rod assembly 2 to clamp off foreign objects, the fixed tube 1 can be fixed by holding the handle 11 to avoid the fixed tube 1 from falling suddenly due to hand slippage.

[0033] like Figure 4-6 As shown, the crocodile tooth pliers 5 include a pliers head 51, a cover plate 52, a first spring 53 and a pressure rod 54. The cover plate 52 is arranged above the pliers head 51 in the length direction of the pliers head 51, and the cover plate 52 is clamped on the pliers head 51. The interior of the pliers head 51 is provided with a groove in the length direction of the pliers head 51. There are two groups of first springs 53, both of which are arranged in the interior of the groove in the length direction of the pliers head 51, and the two groups of first springs 53 are respectively located at two ends of the groove. There are also two groups of pressure rods 54, both of which are vertically arranged in the interior of the groove and are respectively located at two ends of the groove, and the top ends of the two groups of pressure rods 54 pass through the preset sliding groove on the cover plate 52 and are arranged at the top end of the cover plate 52.

[0034] like Figure 4-6 As shown, the two groups of pressure rods 54 are located inside the two groups of first springs 53, one end of the first spring 53 is clamped on the pliers head 51, and the other end of the first spring 53 is clamped on the pressure rod 54, the pressure rod 54 is slidably connected inside the groove and the first spring 53 is a tension spring, so when the pressure rod 54 laterally squeezes the stopper 62 of the quick tool change assembly 6, the first spring 53 is in a stretched state and begins to accumulate force, so when the pressure rod 54 is released, the first spring 53 will use the force accumulated during stretching to pull the pressure rod 54 back to its original position to avoid the pressure rod 54 from blocking the quick tool change assembly 6.

[0035] like Figure 7-8 As shown, the quick tool change assembly 6 includes a shearing blade 61, a stopper 62, a second spring 63, a guide rod 64, a shell 65 and a baffle 66. The shearing blade 61 is arranged on one side of the shell 65 along the length direction of the shell 65, and the shearing blade 61 is fixedly connected to the inside of the shell 65 by screws. A slot is provided on the other side of the shell 65. The guide rod 64 is located in the slot on one side of the shell 65, and the guide rod 64 is bonded to the shell 65. There are two groups of stoppers 62, both of which are arranged inside the shell 65, and the two groups of blocks are respectively located on both sides of the guide rod 64. Both ends of the guide rod 64 are slidably arranged inside the stopper 62. The two groups of stoppers 62 are both clamped on the shell 65 and slidably arranged inside the shell 65. The baffle 66 is located on one side of the guide rod 64 and clamped on the shell 65. After the stopper 62 is placed inside the shell 65, the baffle 66 can be clamped into the inside of the shell 65 to prevent the stopper 62 from falling from the inside of the shell 65.

[0036] like Figure 7-8As shown, there are two groups of second springs 63, which are respectively located on one side of the two groups of blocks 62 and are sleeved on the guide rod 64. Therefore, when the pressure rod 54 or the shell 65 squeezes the block 62 and the block 62 moves to the center position of the shell 65, the block 62 will begin to squeeze the second spring 63. At this time, the second spring 63 will be deformed and begin to accumulate force. When the pressure rod 54 is released or the block 62 moves to the inside of the pliers head 51, the second spring 63 will immediately pop out the block 62 and move it to the inside of the pliers head 51 to clamp the shell 65 and the pliers head 51 to prevent the shell 65 and the cutting blade 61 from falling from the inside of the pliers head 51 during use.

[0037] The movement process of this embodiment: when the device is used, after the cutting blade 61 is fixed to the shell 65 by screws, the shell 65 can be inserted into the inside of the clamp head 51, and then the handle 11 can be held and the end of the fixed cylinder 1 equipped with the cutting blade 61 can be placed into the patient's esophagus. After the hinged rod and the crocodile tooth forceps 5 are placed into the patient's esophagus, the pull rod 4 can be pushed downward so that it can open the hinged rod assembly 2 through the connecting rod assembly 3. After the two sets of crocodile tooth forceps 5 are opened, the direction of the foreign body can continue to be moved.

[0038] After the foreign body that crosses the patient's esophageal wall moves to the position of the cutting blade 61, the pull rod 4 can be pulled upward. When the pull rod 4 moves upward, the hinged rod assembly 2 can be closed through the connecting rod assembly 3, and then the cutting blade 61 can be closed through the crocodile tooth forceps 5 to remove the foreign body. After the foreign body is cut off, the pull rod 4 is pushed downward again to open the hinged rod assembly 2, and then the crocodile tooth forceps 5 are used to take the two sections of foreign body out of the patient's esophagus in turn.

[0039] The above embodiments are only for illustrating the technical idea of ​​the present utility model, and cannot be used to limit the protection scope of the present utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A novel foreign body forceps for digestive endoscopy, characterized in that: The invention comprises a fixed cylinder (1), a hinged rod assembly (2) for closing a blade and a crocodile tooth clamp (5), a connecting rod assembly (3) for driving the hinged rod assembly (2) to close, a pull rod (4) for pulling the connecting rod assembly (3), a crocodile tooth clamp (5) for clamping foreign objects, and a quick blade changing assembly (6) for quickly changing blades, wherein the hinged rod assembly (2) is located at one end of the fixed cylinder (1) and is hinged to the end of the fixed cylinder (1), and the hinged rod assembly (2) is connected to the connecting rod assembly (3). The connecting rod assembly (3) is located at one side of the hinged rod assembly (2) and is arranged inside the fixed cylinder (1), and the other end of the connecting rod assembly (3) is hinged on the pull rod (4), the pull rod (4) is located at one side of the connecting rod assembly (3) and is slidably arranged inside the fixed cylinder (1), the crocodile tooth clamp (5) is located at the other end of the hinged rod assembly (2) and is fixedly connected to the hinged rod assembly (2), and the quick tool change assembly (6) is arranged on one side of the crocodile tooth clamp (5) and is fixedly connected to the crocodile tooth clamp (5).

2. A novel foreign body forceps for digestive endoscopy according to claim 1, characterized in that: The hinged rod assembly (2) comprises a first hinged rod (21), a second hinged rod (22) and a first hinge shaft (23); the first hinged rod (21) and the second hinged rod (22) are arranged crosswise in an "X" shape at one end of the fixed cylinder (1); the first hinge shaft (23) is vertically arranged at the overlapping point of the first hinged rod (21) and the second hinged rod (22) and is hinged to the end of the fixed cylinder (1); one end of the first hinged rod (21) and the second hinged rod (22) are both connected to an alligator tooth clamp (5); the other ends of the first hinged rod (21) and the second hinged rod (22) are both connected to the connecting rod assembly (3).

3. A novel foreign body forceps for digestive endoscopy according to claim 2, characterized in that: The connecting rod assembly (3) comprises a first connecting rod (31), a second connecting rod (32) and a second hinge shaft (33); one end of the first connecting rod (31) is connected to the first hinge rod (21); one end of the second connecting rod (32) is connected to the second hinge rod (22); the other ends of the first connecting rod (31) and the second connecting rod (32) are both hinged on the second hinge shaft (33); the second hinge shaft (33) is arranged at one end of the pull rod (4) and is connected to the pull rod (4).

4. The novel foreign body forceps for digestive endoscopy according to claim 3, characterized in that: The crocodile tooth pliers (5) comprise a pliers head (51), a cover plate (52), a first spring (53) and a pressure rod (54); the cover plate (52) is arranged above the pliers head (51) and is clamped on the pliers head (51); a groove is provided inside the pliers head (51); two groups of the first spring (53) are arranged inside the groove and at both ends of the groove; two groups of the pressure rod (54) are arranged inside the groove in a vertically slidable manner; and the two groups of the pressure rod (54) are respectively located on both sides of the quick tool change assembly (6).

5. The novel foreign body forceps for digestive endoscopy according to claim 4, characterized in that: The quick tool change assembly (6) comprises a shear blade (61), a stopper (62), a second spring (63), a guide rod (64), a housing (65) and a stopper (66); the shear blade (61) is located on one side of the housing (65) and is fixedly connected to the inside of the housing (65); the guide rod (64) is located on the other side of the housing (65) and is connected to the inside of the housing (65); the stopper (62) has two groups, which are respectively arranged at two ends of the guide rod (64) and are slidably connected to the inside of the housing (65); one side of the two groups of stoppers (62) is provided with a second spring (63); the two groups of second springs (63) are both sleeved on the guide rod (64); and the stopper (66) is located on one side of the stopper (62) and is clamped on the housing (65).

6. The novel foreign body forceps for digestive endoscopy according to claim 1, characterized in that: The fixing tube (1) is sleeved with a handle (11), and the cross section of the handle (11) is in the shape of an I.

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