External push rod structure

Abstract

The utility model discloses an external push rod structure which comprises an operation assembly, a communicating pipe and a hook line assembly. The operation assembly comprises a cylindrical fixing assembly, one end of the pull rod is slidably inserted into one end of the cylindrical fixing assembly and fixed to one end of the tension spring, and the other end of the tension spring is fixed to the inner wall of the cylindrical fixing assembly. The thread hooking assembly comprises a base, a semi-annular fixed part and a semi-annular movable part are oppositely combined to form a whole circle, the end of the semi-annular fixed part is fixed to one end of the base, a cavity is formed in the base and communicates with the two ends of the base, and the end of the semi-annular movable part slides into the cavity; a pull wire penetrates through the communicating pipe, one end of the pull wire is fixed to the pull rod, and the other end of the pull wire is fixed to the end of the semicircular movable part. The novel snare has the advantages that the novel snare is provided with the operation assembly, the communicating pipe, the line hooking assembly and the like, the line hooking assembly can open and close the notch through convenient operation, the ring at the end of the snare can be removed and separated, and the communicating pipe is made of medical plastic and can keep toughness under the condition of certain hardness.

Description

Technical field:

[0001] The utility model relates to the field of surgical instruments, in particular to an external push rod structure. Background technology:

[0002] At present, endoscopes are a kind of medical instrument for examining human organs and performing surgery on diseased tissues. Endoscopes are divided into rigid endoscopes and flexible endoscopes. When performing flexible endoscope examinations and surgeries, a transparent mucosal suction sleeve is put on the top of the endoscope, and then the snare is passed through the endoscope's own equipment channel. The snare is used to extend the transparent mucosal suction sleeve to cut the diseased tissue in the diseased area, and then the cut diseased tissue is sucked into the nearby transparent mucosal suction sleeve through the endoscope's adsorption ability to complete the surgery.

[0003] In actual applications, it is found that some lesion tissues are too large and have different shapes, while the commonly used transparent mucosal suction sleeve is an integrated cylindrical shape with a single structure. Therefore, the interior and shape of the transparent mucosal suction sleeve need to match it in order to accommodate the lesion tissue; secondly, the snare passing through the channel of the soft endoscope must also extend out of the sleeve opening of the transparent mucosal suction sleeve. Due to the narrow space of the sleeve opening, the "loop" at the end of the snare is too small, and the lesion tissue with too large volume is not suitable. In view of the above findings, the surgical method is changed, and the "loop" of the snare is put on the outer wall of the transparent mucosal suction sleeve, so as to avoid the problem of the "loop" of the snare being too small. During the operation, the "loop" of the snare is removed from the transparent mucosal suction sleeve. However, there is still a lack of corresponding technology for medical instruments suitable for improved surgery, especially tools for removing the "loop" of the snare. The ends of existing medical forceps are hard straight tubes that cannot bend with the flexible endoscope. Utility model content:

[0004] The purpose of the utility model is to provide an external push rod structure.

[0005] The utility model is implemented by the following technical solutions:

[0006] An external push rod structure includes an operating assembly, a connecting pipe, and a hook wire assembly;

[0007] The operating assembly, the connecting pipe and the ends of the hook wire assembly are connected in sequence;

[0008] The operating assembly includes a cylindrical fixing assembly, a pull rod, and a tension spring. One end of the pull rod is slidably inserted into one end of the cylindrical fixing assembly and fixed to one end of the tension spring. The tension spring is placed in the cylindrical fixing assembly, and the other end is fixed to the inner wall of the cylindrical fixing assembly.

[0009] The hook wire assembly includes a base, a semi-circular fixing part, and a semi-circular movable part. The semi-circular fixing part and the semi-circular movable part are matched to form a full circle. The end of the semi-circular fixing part is fixed to one end of the base. A cavity is provided in the base. The cavity is connected to both ends of the base. The end of the semi-circular movable part slides into the cavity.

[0010] A traction line passes through the interior of the connecting pipe, one end of the traction line is fixed to the pull rod, and the other end is fixed to the end of the semi-annular movable part.

[0011] Preferably, the cylindrical fixing assembly consists of a cylinder and a hand-held handle sleeve integrally fixed on both sides of the cylinder.

[0012] Preferably, a support rod is fixed to the end of the pull rod, and a sliding groove is provided on the side wall of the cylinder corresponding to the support rod, and both ends of the support rod are slidably placed in the sliding groove.

[0013] Preferably, the hook wire assembly further comprises a spring, wherein the spring is placed in the cavity, one end of the spring abuts against the end of the base, and the other end of the spring abuts against the end of the semi-annular movable part.

[0014] The advantages of the utility model are as follows: the utility model has structures such as an operating component, a connecting tube, and a hook wire component. The hook wire component can be conveniently operated by holding the operating component to open and close the gap, thereby realizing the removal and disengagement of the "loop" at the end of the snare. The connecting tube is made of medical plastic, which has a certain hardness and can maintain toughness. Compared with the hard straight tube of the existing medical forceps, it can be used to bend following the flexible endoscope. Description of the drawings:

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 yes Figure 1 A is a partial enlarged schematic diagram;

[0018] Figure 3 It is a schematic diagram of the utility model in use;

[0019] Figure 4 yes Figure 3 A partial enlarged schematic diagram of B in the figure.

[0020] In the figure: operating component 1, cylindrical fixing component 1.1, cylinder 1.1.1, hand-held handle sleeve 1.1.2, pull rod 1.2, support rod 1.2.1, slide groove 1.2.2, tension spring 1.3, connecting pipe 2, hook wire component 3, base 3.1, semi-annular fixing part 3.2, semi-annular movable part 3.3, cavity 3.4, spring 3.5, traction line 4. Specific implementation method:

[0021] 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 of 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.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an external push rod structure includes an operating component 1, a connecting pipe 2, and a hook wire component 3;

[0023] The ends of the operating component 1, the connecting pipe 2 and the hook wire component 3 are connected in sequence;

[0024] The operating assembly 1 comprises a cylindrical fixing assembly 1.1, a pull rod 1.2, and a tension spring 1.3. One end of the pull rod 1.2 is slidably inserted into one end of the cylindrical fixing assembly 1.1 and fixed to one end of the tension spring 1.3. The tension spring 1.3 is placed in the cylindrical fixing assembly 1.1, and the other end is fixed to the inner wall of the cylindrical fixing assembly 1.1. Pulling the pull rod 1.2 outward of the cylindrical fixing assembly 1.1 can drive the tension spring 1.3 to extend, and retracting the tension spring 1.3 can drive the pull rod 1.2 to reset.

[0025] The cylindrical fixing assembly 1.1 is composed of a cylinder 1.1.1 and a hand-held handle sleeve 1.1.2 integrally fixed on both sides of the cylinder 1.1.1;

[0026] A support rod 1.2.1 is fixed at the end of the pull rod 1.2, and a slide groove 1.2.2 is provided on the side wall of the cylinder 1.1.1 corresponding to the support rod 1.2.1. Both ends of the support rod 1.2.1 are slidably placed in the slide groove 1.2.2. The movement of the pull rod 1.2 drives the support rod 1.2.1 to slide in the slide groove 1.2.2, which has the effect of stabilizing the movement, and the length of the slide groove 1.2.2 limits the travel of the pull rod 1.2;

[0027] The hook wire assembly 3 includes a base 3.1, a semi-circular fixing member 3.2, and a semi-circular movable member 3.3. The semi-circular fixing member 3.2 and the semi-circular movable member 3.3 are matched to form a whole circle. The end of the semi-circular fixing member 3.2 is fixed to one end of the base 3.1. A cavity 3.4 is provided in the base 3.1. The cavity 3.4 is connected to both ends of the base 3.1. The end of the semi-circular movable member 3.3 slides into the cavity 3.4. The semi-circular movable member 3.3 moves in the cavity 3.4 of the base 3.1 and can be temporarily separated from the semi-circular fixing member 3.2, so that a gap appears in the whole circle formed by the matching of the semi-circular fixing member 3.2 and the semi-circular movable member 3.3.

[0028] The hook wire assembly 3 also includes a spring 3.5, which is placed in the cavity 3.4, one end of the spring 3.5 abuts against the end of the base 3.1, and the other end of the spring 3.5 abuts against the end of the semi-annular movable part 3.3. The spring 3.5 applies force to the semi-annular movable part 3.3, and pushes the semi-annular movable part 3.3 to align with the semi-annular fixed part 3.2;

[0029] A traction line 4 passes through the connecting pipe 2, one end of the traction line 4 is fixed to the pull rod 1.2, and the other end is fixed to the end of the semi-annular movable part 3.3. By pulling the pull rod 1.2, the semi-annular movable part 3.3 is driven to move through the traction line 4, and a gap appears in the whole circle where the semi-annular fixed part 3.2 and the semi-annular movable part 3.3 are matched, so that the semi-annular movable part 3.3 is opened.

[0030] Working principle: Figure 1 , 2 As shown, when the utility model is in use, the cylindrical fixing component 1.1 is held by hand, wherein the index finger and the middle finger are inserted into the hand-held handle sleeve 1.1.2, and the thumb can be inserted into the ring sleeve at the end of the pull rod 1.2. The pull rod 1.2 is pulled toward the outside of the cylinder 1.1.1 of the cylindrical fixing component 1.1 by the thumb, and the traction line 4 drives the semi-annular movable part 3.3 to move, and the semi-annular movable part 3.3 of the hook line component 3 opens, and the force of the thumb is released, and the tension spring 1.3 drives the pull rod 1.2 to reset, and the spring 3.5 pushes the semi-annular movable part 3.3 to reset.

[0031] First, the semi-circular movable part 3.3 is opened and then closed, and the full circle hook formed by the semi-circular fixed part 3.2 and the semi-circular movable part 3.3 is put on the "loop" of the snare, and the connecting tube 2 and the hook wire assembly 3 follow the flexible endoscope into the lesion area. When removing the "loop", the connecting tube 2 and the hook wire assembly 3 are pushed by the operating component 1, so that the semi-circular fixed part 3.2 and the semi-circular movable part 3.3 remove the "loop", and then the semi-circular movable part 3.3 is opened, and the hook wire assembly 3 is separated from the "loop" by using the notch; or it can be used in conjunction with the snare and separated after the "loop" has caught the lesion tissue.

[0032] The connecting pipe 2 can be made of polyethylene material, which is flexible.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An external push rod structure, characterized in that: It includes an operating assembly, a connecting pipe, and a hook line assembly; The operating assembly, the connecting pipe and the ends of the hook wire assembly are connected in sequence; The operating assembly includes a cylindrical fixing assembly, a pull rod, and a tension spring. One end of the pull rod is slidably inserted into one end of the cylindrical fixing assembly and fixed to one end of the tension spring. The tension spring is placed in the cylindrical fixing assembly, and the other end is fixed to the inner wall of the cylindrical fixing assembly. The hook wire assembly includes a base, a semi-circular fixing part, and a semi-circular movable part. The semi-circular fixing part and the semi-circular movable part are matched to form a full circle. The end of the semi-circular fixing part is fixed to one end of the base. A cavity is provided in the base. The cavity is connected to both ends of the base. The end of the semi-circular movable part slides into the cavity. A traction line passes through the interior of the connecting pipe, one end of the traction line is fixed to the pull rod, and the other end is fixed to the end of the semi-annular movable part.

2. The external push rod structure according to claim 1, characterized in that: The cylindrical fixing assembly consists of a cylinder and a hand-held handle sleeve integrally fixed on both sides of the cylinder.

3. The external push rod structure according to claim 2, characterized in that: A support rod is fixed at the end of the pull rod, and a sliding groove is provided on the side wall of the cylinder corresponding to the support rod, and two ends of the support rod are slidably placed in the sliding groove.

4. The external push rod structure according to claim 1, characterized in that: The hook wire assembly also includes a spring, which is placed in the cavity, one end of the spring abuts against the end of the base, and the other end of the spring abuts against the end of the semi-annular movable part.

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