Hose type sampling forceps for multi-head endoscope

Abstract

The utility model relates to the technical field of medical instruments, in particular to a pair of hose type sampling forceps for a multi-head endoscope, which comprises a fixed cylinder component, a guide pipe assembly is connected to the fixing cylinder assembly, a fixing assembly is installed at the end of the guide pipe assembly, a clamping assembly is hinged to the interior of the fixing assembly, and a steel wire can drive a first sliding plate and a second sliding plate to move at the same time when pulled; when the second sliding plate slides, the two clamping jaws are driven to rotate and open with the fixing shaft as the axis and drive the needle head to slide in the middle section of the fixing shaft, the pull ring is loosened, the two clamping jaws can be closed again and cut and sample under the action of the first spring, the second spring and the third spring, and meanwhile the tip end of the needle head can extend to the position between the two clamping jaws again. Then the locking piece is shifted, under the action of the fourth spring, when the piston moves, the generated negative pressure is utilized to suck the sample into the needle head through the needle head, so that the sampling operation is completed, and compared with traditional sampling pliers, the sampling operation is more convenient, and sample separation caused by misoperation is effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely is a kind of hose type sampling forceps for multi-head endoscope. BACKGROUND

[0002] When doctor is in the diagnosis and treatment to the internal pathological position of intestines and stomach and viscera, needs to use endoscope to observe pathological position, and uses the sampling forceps matched in observation to sample pathological position, for case analysis test, to confirm pathological nature, endoscope sampling forceps mainly pass through flexible endoscope forceps channel.

[0003] A kind of sampling forceps for intestines and stomach endoscope is disclosed in a patent with publication number CN209252952U, belongs to medical instrument field, its technical scheme main point is including fixed handle, fixed handle rotationally connected with movable handle, the end of fixed handle is installed metal hose, transmission steel wire is worn in the metal hose, the end of movable handle is connected with transmission steel wire, the end of metal hose away from fixed handle is installed with forceps head, a plurality of clamping claws are rotationally connected on the forceps head, pull rod is arranged in the forceps head, transmission steel wire is connected with clamping claw by pull rod and drives clamping claw to rotate, sampling needle is arranged at the center position of forceps head, clamping claw wraps sampling needle, sampling needle is hollowly arranged and the end of sampling needle is provided with suction port, suction tube is arranged in the metal hose, one end of suction tube is communicated with sampling needle, the other end of suction tube extends out of metal hose, the sampling forceps for intestines and stomach endoscope has the advantages of quickly extracting lesion sample, and firmly fixing lesion sample.

[0004] And because existing endoscope sampling forceps need to be operated by both hands when using, the hand held in fixed handle is prone to loosening when operating, in turn causes forceps head to loosen and lead to sample to fall off, lead to inconvenient operation, and when the sampling volume is small, sampling needle cannot be accurately inserted into sample to suck, in turn affect sampling effect;Therefore, in view of the above problems, a kind of hose type sampling forceps for multi-head endoscope is provided. UTILITY MODEL CONTENTS

[0005] In order to make up for the deficiency of prior art, in view of the problems existing in prior art, the utility model provides a kind of hose type sampling forceps for multi-head endoscope.

[0006] The technical scheme adopted by the utility model to solve its technical problems is: the utility model provides a kind of hose type sampling forceps for multi-head endoscope, including fixed cylinder assembly;The fixed cylinder assembly is connected with catheter assembly, the end of catheter assembly is installed with fixed assembly, the fixed assembly is hingedly connected with clamping assembly;

[0007] The catheter assembly comprises a flexible tube, a steel wire and a gas guide tube arranged in the flexible tube, the fixing assembly comprises a fixing head, a fixing shaft is fixedly connected in the fixing head, the clamping assembly is hingedly connected on the fixing shaft, a needle is slidably arranged in the middle section of the fixing shaft, the needle is connected with the gas guide tube through a connecting tube, and the end of the gas guide tube in the fixing cylinder assembly is connected with a negative pressure assembly.

[0008] The end of the steel wire in the fixing head is fixedly connected with a second sliding plate, two linkage rods are rotatably arranged on the side of the second sliding plate, the two linkage rods are arranged in an intersecting manner and are rotatably connected at the intersecting position, and the ends of the two linkage rods are rotatably connected to the inner side of the clamping assembly.

[0009] The second sliding plate is connected with the needle through a connecting rod, and when the steel wire is retracted, the clamping assembly can be opened, and the needle can be retracted in the fixing shaft.

[0010] Preferably, the fixing head is fixedly connected to the end of the flexible tube, a first fixing member is fixedly connected in the fixing head, the end of the steel wire is arranged in the first fixing member, a second spring is arranged between the second sliding plate and the first fixing member, the second spring is sleeved on the end of the steel wire, two second guide rails are symmetrically fixed on the inner wall of the fixing head, and the second sliding plate is slidably arranged between the two second guide rails.

[0011] Preferably, a pointed end is arranged at the end opposite to the second sliding plate of the needle, a fixing plate is fixedly connected to the same side of the needle and the pointed end of the needle, a third spring is sleeved on the needle, the third spring is located between the fixing plate and the fixing shaft, a connecting tube is arranged on the end opposite to the pointed end of the needle, the other end of the connecting tube is connected with the gas guide tube, and the connecting rod is connected to the end opposite to the pointed end of the needle.

[0012] Preferably, the clamping assembly comprises two clamping jaws, a connecting plate is fixedly connected to each of the two clamping jaws, a switching plate is fixedly connected to the opposite sides of the two connecting plates, the two switching plates are symmetrically and hingedly connected on the fixing shaft in an up-down manner, the ends of the two linkage rods are rotatably connected to the inner sides of the two connecting plates, and cutting edges are arranged on the openings of the two clamping jaws.

[0013] Preferably, the fixing cylinder assembly comprises an outer cylinder, the flexible tube is arranged on the outer cylinder, a handle is fixedly connected to the outer wall of the outer cylinder, two first guide rails are symmetrically fixed to the inner wall of the outer cylinder, a first sliding plate is slidably arranged between the two first guide rails, a pull rod is fixedly connected to the first sliding plate, and the end of the pull rod is connected with the steel wire.

[0014] Preferably, the pull rod is sleeved with a sleeve, the sleeve is fixed to the end of the flexible tube in the outer cylinder, a first baffle is fixed in the outer cylinder, a spring is sleeved on the outer side of the pull rod, and the spring is located between the first sliding plate and the first baffle.

[0015] Preferably, the negative pressure assembly comprises an inner cylinder fixed to the inner wall of the outer cylinder, a piston is slidably arranged in the inner cylinder, a connecting rod is fixed to the side of the piston, and an end plate is fixed to the end of the connecting rod penetrating through the inner cylinder and the outer cylinder.

[0016] Preferably, a locking member for limiting is buckled on the end plate, the locking member is rotatably installed on the handle, a fourth spring is arranged in the inner cylinder and located on the side opposite to the piston and the connecting rod, and the end of the inner cylinder opposite to the connecting rod is communicated with the air guide pipe.

[0017] The utility model discloses the beneficial effect that lies in:

[0018] When the steel wire is pulled, the first sliding plate and the second sliding plate are simultaneously moved, the second sliding plate rotates and opens the two clamping jaws when sliding, and the needle head slides in the middle segment of the fixed shaft, the pull ring is loosened, the two clamping jaws are re-closed and cut the sample under the action of the first spring, the second spring and the third spring, the tip of the needle head extends between the two clamping jaws again, then the locking member is actuated, the piston moves under the action of the fourth spring, and the sample is sucked into the needle head through the needle head by the generated negative pressure, so that the sampling operation is completed. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating creative labor.

[0020] Figure 1 It is the first three-dimensional structure schematic diagram in this embodiment;

[0021] Figure 2 It is the fixed assembly main body structure cutout enlarged schematic diagram in this embodiment;

[0022] Figure 3 It is the fixed assembly main body structure cutout enlarged schematic diagram in this embodiment;

[0023] Figure 4 It is the fixed assembly main body structure cutout enlarged schematic diagram in this embodiment;

[0024] Figure 5 It is the enlarged schematic view of B area in the fixing cylinder assembly body installation structure of the embodiment;

[0025] Figure 6 It is the enlarged schematic view of B area in the fixing cylinder assembly body installation structure of the embodiment;

[0026] Figure 7 It is the enlarged schematic view of B area in the fixing cylinder assembly body installation structure of the embodiment;

[0027] Figure 8 It is the enlarged schematic view of B area in the fixing cylinder assembly body installation structure of the embodiment;

[0028] In the figure: 1, fixing cylinder assembly; 11, outer cylinder; 12, No. 1 guide rail; 13, No. 1 sliding plate; 14, pull rod; 15, sleeve; 16, No. 1 baffle; 17, No. 1 spring; 18, pull ring;

[0029] 2, catheter assembly; 21, flexible tube; 22, steel wire; 23, air guide pipe;

[0030] 3, fixing assembly; 31, fixing head; 32, fixing shaft; 33, No. 1 fixing piece; 34, No. 2 sliding plate; 35, No. 2 spring; 36, No. 2 guide rail; 37, linkage rod; 38, needle head; 39, fixing plate; 310, No. 3 spring; 311, connecting rod; 312, connecting pipe;

[0031] 4, clamping assembly; 41, clamping jaw; 42, connecting plate; 43, cutting edge; 44, adapter plate;

[0032] 5, handle bar;

[0033] 6, negative pressure assembly; 61, inner cylinder; 62, piston; 63, connecting rod; 64, end plate; 65, locking piece; 66, No. 4 spring. DETAILED DESCRIPTION

[0034] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0035] Please refer to Figures 1-8 As shown in the figure, a hose type sampling forceps for multi-head endoscope comprises a fixing cylinder assembly 1; the fixing cylinder assembly 1 is connected with a catheter assembly 2; the catheter assembly 2 is provided with a fixing assembly 3 at the end; the fixing assembly 3 is hingedly connected with a clamping assembly 4;

[0036] The catheter assembly 2 comprises a flexible tube 21, a steel wire 22 and a guide tube 23 arranged in the flexible tube 21, the fixing assembly 3 comprises a fixing head 31, a fixing shaft 32 fixedly connected in the fixing head 31, and the clamping assembly 4 is hingedly connected on the fixing shaft 32, a needle 38 is slidingly arranged in the middle of the fixing shaft 32, and the needle 38 is connected with the guide tube 23 through a connecting tube 312, and the end of the guide tube 23 in the fixing cylinder assembly 1 is connected with a negative pressure assembly 6.

[0037] The end of the steel wire 22 in the fixing head 31 is fixedly connected with a second sliding plate 34, two linkage rods 37 are rotatably installed on the side of the second sliding plate 34, and the two linkage rods 37 are arranged in cross and rotatably connected at the cross position, and the ends of the two linkage rods 37 are rotatably connected to the inner side of the clamping assembly 4.

[0038] The second sliding plate 34 is connected with the needle 38 through a connecting rod 311, and when the steel wire 22 is retracted, the clamping assembly 4 can be opened, and the needle 38 can be retracted in the fixing shaft 32.

[0039] The fixing head 31 is fixedly connected to the end of the flexible tube 21, a first fixing piece 33 is fixedly connected in the fixing head 31, and the end of the steel wire 22 is arranged through the first fixing piece 33, a second spring 35 is arranged between the second sliding plate 34 and the first fixing piece 33, and the second spring 35 is sleeved on the end of the steel wire 22, two second guide rails 36 are symmetrically fixedly connected on the inner wall of the fixing head 31, and the second sliding plate 34 is slidingly arranged between the two second guide rails 36.

[0040] The end of the needle 38 opposite to the sharp end is provided with a sharp end, the needle 38 is fixedly connected with a fixing plate 39 on the same side of the sharp end, a third spring 310 is sleeved on the needle 38, and the third spring 310 is located between the fixing plate 39 and the fixing shaft 32, a connecting tube 312 is installed on the end of the needle 38 opposite to the sharp end, the other end of the connecting tube 312 is connected with the guide tube 23, and the connecting rod 311 is connected at the end of the needle 38 opposite to the sharp end.

[0041] The clamping assembly 4 comprises two clamping jaws 41, a connecting plate 42 is fixedly connected on each of the two clamping jaws 41, a transfer plate 44 is fixedly connected on the opposite sides of the two connecting plates 42, and the two transfer plates 44 are symmetrically and rotatably hinged on the fixing shaft 32, the ends of the two linkage rods 37 are rotatably connected to the inner sides of the two connecting plates 42 respectively, and the openings of the two clamping jaws 41 are provided with cutting edges 43.

[0042] The fixed cylinder assembly 1 comprises an outer cylinder 11, the flexible pipe 21 is installed on the outer cylinder 11, a handle 5 is fixed on the outer wall of the outer cylinder 11, two first guide rails 12 are symmetrically fixed on the inner wall of the outer cylinder 11, a first sliding plate 13 is slidably arranged between the two first guide rails 12, a pull rod 14 is fixed on the first sliding plate 13, and the end of the pull rod 14 is connected with the steel wire 22.

[0043] The pull rod 14 is sleeved with a sleeve 15, the sleeve 15 is fixed on the end of the flexible pipe 21 in the outer cylinder 11, a first baffle 16 is fixed in the outer cylinder 11, a first spring 17 is sleeved on the outer side of the pull rod 14, the first spring 17 is located between the first sliding plate 13 and the first baffle 16, and a pull ring 18 is fixed on the end of the pull rod 14 opposite to the steel wire 22 and penetrates the outer cylinder 11.

[0044] The negative pressure assembly 6 comprises an inner cylinder 61, the inner cylinder 61 is fixed on the inner wall of the outer cylinder 11, a piston 62 is slidably arranged in the inner cylinder 61, a connecting rod 63 is fixed on the side of the piston 62, an end plate 64 is fixed on the end of the connecting rod 63 and penetrates the inner cylinder 61 and the outer cylinder 11.

[0045] A locking piece 65 for limiting is buckled on the end plate 64, the locking piece 65 is rotatably installed on the handle 5, a fourth spring 66 is arranged in the inner cylinder 61 and located on the side of the piston 62 opposite to the connecting rod 63, and the end of the inner cylinder 61 opposite to the connecting rod 63 is communicated with the air guide pipe 23.

[0046] In operation, the existing endoscope sampling forceps need to be operated by both hands, which is not convenient. When the sampling volume is small, the sampling needle cannot be accurately inserted into the sample for suction, thereby affecting the sampling effect. In the present scheme, the initial state of the first spring 17 always pushes the first sliding plate 13 to one side of the catheter assembly 2, so that the first sliding plate 13 drives the pull rod 14 to extend into the sleeve 15, and the pull rod 14 drives the steel wire 22 to extend into the fixed assembly 3. The second spring 35 always pushes the second sliding plate 34 to one side of the fixed shaft 32, so that the second sliding plate 34 slides in the second guide rail 36, and the second sliding plate 34 pushes the two linkage rods 37 to reduce the included angle between the two sides of the two linkage rods 37, so as to drive the two connecting plates 42 connected to the end of the two linkage rods 37 to be embedded in the opening of the fixed head 31, so that the connecting plate 42 is installed at the end of the two clamping jaws 41 in the occluded state. The second sliding plate 34 will push the needle 38 between the clamping jaws 41 through the connecting rod 311 while sliding, and the third spring 310 will always push the fixed plate 39 to the side opposite to the fixed shaft 32, so that the fixed plate 39 drives the tip of the needle 38 to extend between the two clamping jaws 41. In addition, the fourth spring 66 always pushes the piston 62 to the side opposite to the air guide tube 23, so that the connecting rod 63 extends out of the inner cylinder 61.

[0047] In operation, the connecting rod 63 is first pressed into the inner cylinder 61, and then the locking member 65 is turned over on the handle 5 to be buckled on the end plate 64 to limit and fix the end plate 64. After the connecting rod 63 is retracted into the inner cylinder 61, it pushes the piston 62 to move in the inner cylinder 61 towards the air guide tube 23, and squeezes the fourth spring 66 to make it retract. Then the sampling operation can be performed. When clamping, the pull ring 18 is pulled to extend the pull rod 14 out of the outer cylinder 11, and the steel wire 22 is pulled. The steel wire 22 is pulled to move the first sliding plate 13 and the second sliding plate 34 at the same time. The first sliding plate 13 moves to the side of the first baffle 16 to squeeze the first spring 17 to make it retract. The second sliding plate 34 moves to the side of the first fixed member 33 to squeeze the second spring 35 to make it retract. The second sliding plate 34 slides under the guidance of the second guide rail 36, and rotates the two linkage rods 37 while sliding, so that the included angle between the two sides of the two linkage rods 37 gradually increases, so that the end of the two linkage rods 37 and the two connecting plates 42 gradually shrink inward, to drive the two clamping jaws 41 to rotate around the fixed shaft 32 to open for clamping operation. The second sliding plate 34 will drive the needle 38 to slide in the fixed shaft 32 and move to one side of the catheter assembly 2 through the connecting rod 311 while sliding. The needle 38 moves to squeeze the third spring 310 on one side of the fixed shaft 32 to make it retract.

[0048] When the two clamping jaws 41 are opened and the needle 38 is retracted, the two opened clamping jaws 41 are aligned with the lesion position and the pull ring 18 is released, under the action of the first spring 17, the second spring 35 and the third spring 310, the two clamping jaws 41 will be closed again, and in the closing process, the lesion position is cut and sampled, at the same time, the tip of the needle 38 will be extended between the two clamping jaws 41 again, and the tip of the needle 38 will be inserted into the sample in the two clamping jaws 41, then the locking piece 65 is actuated, so that the locking piece 65 releases the restriction of the end plate 64, at this time, under the action of the fourth spring 66, the piston 62 will move to the side opposite to the air duct 23 again, and when the piston 62 moves, the negative pressure generated on the side of the fourth spring 66 is used, and the generated negative pressure is used to suck the sample into the needle 38 through the needle 38, so as to complete the sampling operation;

[0049] The cooperation achieves the sample retention effect, compared with the traditional sampling forceps, the sampling operation is more convenient, the sample is effectively prevented from being separated due to misoperation, and the accuracy and sampling effect of the sampling operation are improved.

[0050] The basic principle, main features and advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model.

Claims

1. A hose-type biopsy forceps for a multi-head endoscope, characterized by: Including fixed cylinder assembly (1), the fixed cylinder assembly (1) is connected with the catheter assembly (2), the catheter assembly (2) end installation has fixed assembly (3), the fixed assembly (3) is hinged with the clamping assembly (4) in it; The catheter assembly (2) includes a flexible tube (21), a steel wire (22) and a gas guide tube (23) are arranged in the flexible tube (21), the fixed assembly (3) includes a fixed head (31), the fixed head (31) is fixedly connected with a fixed shaft (32), and the clamping assembly (4) is hinged on the fixed shaft (32), a needle (38) is slidably arranged in the middle of the fixed shaft (32), and the needle (38) is connected with the gas guide tube (23) through a connecting pipe (312), and the end of the gas guide tube (23) in the fixed cylinder assembly (1) is connected with a negative pressure assembly (6); The end of the steel wire (22) in the fixed head (31) is fixedly connected with a second sliding plate (34), two linkage rods (37) are rotatably installed on the side surface of the second sliding plate (34), and the two linkage rods (37) are arranged in cross and rotatably connected at the cross position, and the end of the two linkage rods (37) is rotatably connected to the inner side of the clamping assembly (4). The second sliding plate (34) is connected with the needle (38) through a connecting rod (311), when the steel wire (22) is retracted, the clamping assembly (4) can be opened, and the needle (38) is retracted in the fixed shaft (32).

2. The flexible tube type biopsy forceps for a multi-head endoscope according to claim 1, characterized in that: The fixed head (31) is fixedly connected to the end of the flexible tube (21), a first fixed part (33) is fixedly connected in the fixed head (31), the end of the steel wire (22) is arranged in the first fixed part (33), a second spring (35) is arranged between the second sliding plate (34) and the first fixed part (33), the second spring (35) is sleeved on the end of the steel wire (22), two second guide rails (36) are symmetrically fixed on the inner wall of the fixed head (31), and the second sliding plate (34) is slidably arranged between the two second guide rails (36).

3. The flexible biopsy forceps for a multi-head endoscope according to claim 1, characterized in that: The end of the needle (38) opposite to the second sliding plate (34) is provided with a sharp end, the needle (38) is fixedly connected with a fixed plate (39) on the same side of the sharp end, a third spring (310) is sleeved on the needle (38), the third spring (310) is located between the fixed plate (39) and the fixed shaft (32), a connecting pipe (312) is installed on the end of the needle (38) opposite to the sharp end, the other end of the connecting pipe (312) is connected with the gas guide tube (23), and the connecting rod (311) is connected to the end of the needle (38) opposite to the sharp end.

4. The flexible biopsy forceps for a multi-head endoscope according to claim 1, characterized in that: The clamping assembly (4) comprises two clamping jaws (41), the two clamping jaws (41) are fixedly connected with connecting plates (42), the opposite sides of the two connecting plates (42) are fixedly connected with adapter plates (44), the two adapter plates (44) are symmetrically and rotatably connected to the fixed shaft (32), the two ends of the two linkage rods (37) are respectively rotatably connected to the inner sides of the two connecting plates (42), and the openings of the two clamping jaws (41) are provided with cutting edges (43).

5. The flexible biopsy forceps for a multi-head endoscope according to claim 1, characterized in that: The fixed cylinder assembly (1) comprises an outer cylinder (11), the flexible pipe (21) is mounted on the outer cylinder (11), the outer wall of the outer cylinder (11) is fixedly connected with a handle (5), the inner wall of the outer cylinder (11) is symmetrically fixedly connected with two first guide rails (12), the two first guide rails (12) are commonly and slidably provided with a first sliding plate (13), the first sliding plate (13) is fixedly connected with a pull rod (14), and the end of the pull rod (14) is connected with a steel wire (22).

6. A flexible biopsy forceps for a multi-head endoscope according to claim 5, characterized in that: The outer side of the pull rod (14) is sleeved with a sleeve (15), the sleeve (15) is fixedly connected to the end of the flexible pipe (21) located in the outer cylinder (11), a first baffle (16) is fixedly connected in the outer cylinder (11), a first spring (17) is sleeved on the outer side of the pull rod (14), and the first spring (17) is located between the first sliding plate (13) and the first baffle (16), and a pull ring (18) is fixedly connected to the end of the pull rod (14) opposite to the steel wire (22) and penetrates the outer cylinder (11).

7. The flexible biopsy forceps for a multi-head endoscope according to claim 1, characterized by: The negative pressure assembly (6) comprises an inner cylinder (61), and the inner cylinder (61) is fixedly connected to the inner wall of the outer cylinder (11), the inner cylinder (61) is slidably provided with a piston (62), the side of the piston (62) is fixedly connected with a connecting rod (63), and the end of the connecting rod (63) is fixedly connected with an end plate (64) penetrating the inner cylinder (61) and the outer cylinder (11).

8. The flexible biopsy forceps for a multi-head endoscope according to claim 7, characterized by: The end plate (64) is buckled with a locking member (65) for limiting, the locking member (65) is rotatably installed on the handle (5), the inner cylinder (61) is provided with a fourth spring (66), and the fourth spring (66) is located on the side opposite to the piston (62) and the connecting rod (63), and the end of the inner cylinder (61) opposite to the connecting rod (63) is communicated with the air guide pipe (23).

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