CN218960860U - Connection structure and endoscope lower clamp cutting instrument - Google Patents

Abstract

The utility model provides a connecting structure and an endoscope lower clamp cutting instrument, and relates to the technical field of medical instruments. The connecting structure provided by the utility model has the advantages of simple structure, firm connection, low cost, convenience in assembling the clamping and cutting instrument and the like.

Description

Connection structure and endoscope lower clamp cutting instrument

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a connecting structure and an endoscope lower clamp cutting instrument.

Background

Currently, in the surgical procedures such as endoscopic (Electro-Static discharge) and the like, a doctor usually needs some cutting and clamping apparatuses to clamp and cut a diseased tissue and an operation auxiliary device, and in order to facilitate the accurate alignment of an operation head at the distal end of the apparatus with the diseased tissue or the operation auxiliary device, the apparatus is usually provided with a rotary connection structure.

In the conventional rotary connection structure, for example, the rotary connection structure on a heat forceps (a heat biopsy forceps and an electric coagulation forceps), a connection ring is usually required to be welded on a metal connector at the outer end part of a flexible tube, and the connection ring and the metal connector can form a clamping groove for clamping with an operation head to form a rotary structure of the forceps head. The welding process is inconvenient for assembling the instrument, the exposed metal connector increases the length of the exposed metal section, in the clinical process, a doctor can retract the part of the exposed metal section into the working cavity of the endoscope in order to obtain clear view and accurate cutting or coagulation effect, so that the exposed metal part of the hot clamp can be in direct contact with the far end (metal piece) of the working cavity of the endoscope in many times, heat is transferred to the head of the endoscope, the damage of the endoscope is caused, the conductivity of the instrument is reduced, and the problems of poor cutting or coagulation effect and the like are caused.

Disclosure of Invention

The utility model aims to provide a connecting structure and an endoscope lower clamp cutting instrument, which have the advantages of simple structure, firm connection, low cost, convenience in assembly and the like.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

in a first aspect, the utility model provides a connection structure, which comprises a connection piece, a spiral flexible pipe and a rotating seat, wherein the connection piece is in spiral connection with the spiral flexible pipe, the connection piece is matched with a contact surface of the spiral flexible pipe, a limiting ring groove is formed between the connection piece and the spiral flexible pipe, and the rotating seat is sleeved outside the connection piece and is in rotating fit with the limiting ring groove.

Further, the connecting piece stretches into the spiral flexible pipe and is in spiral connection with the spiral flexible pipe, and the connecting piece is provided with a through hole along the axis direction of the spiral flexible pipe.

Further, the rotating seat is in clearance fit with the connecting piece.

Further, the end part of the connecting piece, which is away from the spiral flexible pipe, is positioned in the rotating seat, and one end of the rotating seat, which is away from the spiral flexible pipe, is provided with a mounting hole communicated with the end part of the connecting piece.

Further, the rotating seat comprises a rotating piece and a limiting cylinder connected with the rotating piece, the limiting cylinder and the rotating piece are provided with the mounting holes, and the rotating piece is sleeved outside the connecting piece and is in running fit with the limiting ring groove.

In a second aspect, the utility model further provides an endoscopic down-clamping and cutting instrument, which comprises an operation body and the connecting structure according to the scheme, wherein the operation body is movably connected with the rotating seat, and the operation body is used for performing operation.

Further, the operation body comprises a pull rod and two operation heads, and both the operation heads are provided with a hinge hole and a guide through groove;

one of the pull rod and the rotating seat is hinged with the hinge holes in the two operation heads, and the other one is rotationally and slidingly connected with the guide through grooves in the two operation heads;

the pull rod penetrates through the connecting piece and stretches into the spiral flexible pipe, the pull rod is in sliding fit with the connecting piece, and the guide through groove is used for being matched with the rotating seat to drive the two operating heads to be opened and closed under the pushing and pulling of the pull rod.

Further, the pull rod is provided with a first pin, the rotating seat is provided with a second pin, one of the first pin and the second pin is hinged with the hinge holes in the two operation heads, and the other pin is in rotary and sliding connection with the guide through grooves in the two operation heads.

Further, the operation body comprises a cutter head, a fastener and an operation wire, the cutter head is provided with a cutting end and a connecting end, the cutting end of the cutter head is in a hook shape, the connecting end of the cutter head is slidably arranged in the rotating seat and connected with the operation wire through the fastener, and the operation wire penetrates through the connecting piece and stretches into the spiral flexible pipe.

Further, the flexible pipe comprises a fixed handle and a movable handle movably connected with the fixed handle, the end part of the flexible pipe, which is far away from the connecting piece, is connected with the fixed handle, and the operation body is connected with the movable handle.

The connecting structure and the endoscope lower clamp cutting instrument provided by the utility model have the following beneficial effects:

the connecting structure provided by the first aspect of the utility model comprises a connecting piece, a spiral flexible pipe and a rotating seat, wherein the connecting piece is in spiral connection with the spiral flexible pipe (the spiral flexible pipe can be a spring pipe, wires of the spring pipe can be of various cross-sectional shapes, a tubular structure is formed by winding, an inner cavity of the spring pipe can naturally form wave-like concave-convex shapes and is spiral, the outer circle part of the connecting piece is designed into a spiral structure matched with the inner cavity of the spring pipe, and perfect screwing of the connecting piece and the spring pipe can be realized), so that a limit ring groove for limiting the position of the rotating seat is formed, and the rotating seat can rotate relative to the limit ring groove. The spiral flexible tube can be connected with the handle of the clamping and cutting instrument, and the rotating seat can be connected with the operation body of the cutting instrument, so that the operation body can rotate relative to the handle, and the operation body is convenient to align with pathological tissues or operation auxiliary devices. Compared with the prior art, the connecting structure provided by the first aspect of the utility model does not need a welding process, has the advantages of simple structure, firm connection, low cost, convenience in assembling clamping and cutting instruments and the like, and simultaneously, for the hot tongs, the length of a metal exposed section is greatly reduced, the risk of scalding a mirror is reduced, and the problem of poor cutting or electric coagulation effect is solved.

Compared with the prior art, the endoscope lower clamp cutting instrument provided by the second aspect of the utility model comprises the operation body and the connecting structure, and has the advantages of convenience in assembly, simple structure, reduction of processing procedures, low cost and the like.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic three-dimensional structure of a connection structure according to an embodiment of the present utility model;

FIG. 2 is a schematic three-dimensional structure of a connector according to an embodiment of the present utility model;

FIG. 3 is a schematic view of an exploded view of a portion of an endoscopic undercut instrument according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a portion of an endoscopic undercut instrument provided in accordance with a first embodiment of the present utility model;

FIG. 5 is a schematic view of an exploded view of a portion of an endoscopic down-clipping instrument according to a second embodiment of the present utility model;

FIG. 6 is a cross-sectional view of a portion of an endoscopic undercut instrument provided in accordance with a second embodiment of the present utility model;

FIG. 7 is a schematic view of an exploded view of a portion of an endoscopic down-clipping instrument according to a third embodiment of the present utility model;

FIG. 8 is a cross-sectional view of a portion of an endoscopic undercut instrument provided in accordance with a third embodiment of the present utility model;

fig. 9 is a schematic structural view of an endoscopic down-clamping and cutting instrument according to an embodiment of the present utility model.

Icon: 1-a connector; 11-a through hole; 2-helical flexible tubing; 3-a rotating seat; 31-mounting holes; 32-a rotating member; 32 a-a first rotating member; 32 b-a second rotating member; 32 c-a third rotary member; 33-a limiting cylinder; 33 a-a first limiting cylinder; 331 a-a first escape slot; 33 b-a second limiting cylinder; 331 b-a second avoidance groove; 33 c-a third limiting cylinder; 331 c-knife slot; 4-operating the body; 41-a pull rod; 41 a-a first tie rod; 41 b-a second tie rod; 42-an operating head; 42 a-a first operating head; 42 b-a second operating head; 43-hinge holes; 44-guiding through grooves; 45-a first pin; 46-a second pin; 47-cutter head; 471-wire inlet; 472-through holes; 48-fasteners; 49-operating wire; 5-fixing a handle; 6-a movable handle.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

An embodiment of the first aspect of the present utility model is to provide a connection structure, as shown in fig. 1 and 2, including a connection piece 1, a spiral flexible tube 2 and a rotating seat 3, where the connection piece 1 is in spiral connection with the spiral flexible tube 2, the connection piece 1 is matched with a contact surface of the spiral flexible tube 2, a limiting ring groove is formed between the connection piece 1 and the spiral flexible tube 2, and the rotating seat 3 is sleeved outside the connection piece 1 and is in running fit with the limiting ring groove.

In the connection structure provided in the above embodiment, the connection member 1 may be directly screwed on the spiral flexible tube 2, so as to form a limiting ring groove capable of being in running fit with the rotary seat 3. Compared with the prior art that the flexible pipe is externally sleeved with the metal connector, the connecting ring is welded with the outer surface of the connecting ring, so that the process steps are simplified, the assembly is convenient, and the cost is reduced. In addition, when the connecting structure is applied to the thermal biopsy forceps, the exposed length of the metal tube is shortened, and the problems that the conductive performance of the instrument is reduced, a lens is scalded and the like due to direct contact between the exposed metal connector and the outlet (metal piece) of the working cavity of the endoscope are avoided.

In at least one embodiment, as shown in FIG. 1, the connector 1 extends into the coiled flexible tubing 2 for threaded connection with the coiled flexible tubing 2, thereby enabling the connector 1 to be hidden within the instrument after assembly is complete while reducing the outer diameter size of the instrument.

Specifically, in order to allow the pulling member such as the pulling rod 41 or the operation wire 49 that pulls the operation head to extend to the proximal end of the instrument, the connector 1 is provided with a through hole 11 along the axis of the spiral flexible tube 2, and the through hole 11 allows the pulling member such as the pulling rod 41 or the operation wire 49 to pass through.

In some embodiments, the rotating base 3 is in clearance fit with the connecting piece 1, so that the rotating base 3 can rotate more smoothly relative to the connecting piece 1.

In some embodiments, to facilitate assembly of the connector 1, the end of the connector 1 facing away from the coiled flexible tube 2 is located within the swivel 3, and the end of the swivel 3 facing away from the coiled flexible tube 2 is provided with a mounting hole 31 communicating to the end of the swivel 3.

During assembly, the rotating seat 3 can be aligned with the spiral flexible pipe 2, then the connecting piece 1 extends into the mounting hole 31, and finally the connecting piece 1 is screwed in the spiral flexible pipe 2 by penetrating the mounting hole 31 through tools such as a screwdriver.

On the basis of the above embodiment, the end of the connecting piece 1 facing away from the spiral flexible tube 2 is provided with a groove for cooperation with a tool such as a screwdriver.

In some embodiments, the rotating base 3 may include a rotating member 32 and a limiting cylinder 33 connected to the rotating member 32, where the limiting cylinder 33 and the rotating member 32 are provided with mounting holes 31. The limiting cylinder 33 can be used for being matched with the operation body 4 in the instrument to realize the limiting effect on the operation body 4, and the rotating piece 32 is sleeved outside the connecting piece 1 and is in rotating fit with the limiting ring groove.

The rotating member 32 and the limiting cylinder 33 may be two independent components, or may be an integral structure.

An embodiment of the second aspect of the present utility model is to provide an endoscopic under-clip cutting apparatus, where the endoscopic under-clip cutting apparatus provided in the embodiment of the second aspect of the present utility model includes an operation body 4 and the above-mentioned connection structure, the operation body 4 is movably connected with the rotating base 3, and the operation body 4 is used for performing a surgical operation.

The endoscope lower clamp cutting instrument provided by the embodiment of the second aspect of the utility model comprises the operation body 4 and the connecting structure, and has the advantages of convenience in assembly, simple structure, reduction of processing procedures, low cost and the like.

Depending on the structure of the operation body 4, the following three embodiments can be specifically classified:

embodiment one:

in the first embodiment, as shown in fig. 3 and 4, the operation body 4 includes a pull rod 41 and two operation heads 42, the pull rod 41 is hereinafter referred to as a first pull rod 41a, the operation heads 42 are referred to as first operation heads 42a, the two first operation heads 42a may be forceps heads or scissor heads, and as shown in fig. 3, the two first operation heads 42a are forceps heads, so as to implement forceps of a diseased tissue or an operation auxiliary device, wherein:

the two first operating heads 42a are provided with a hinge hole 43 and a guide through groove 44, the first pull rod 41a penetrates through the connecting piece 1 and stretches into the spiral flexible pipe 2, the first pull rod 41a is in sliding fit with the connecting piece 1 and is hinged with the hinge holes 43 in the two first operating heads 42a, and the rotating seat 3 is in rotating and sliding connection with the guide through groove 44 in the two operating heads 42.

Specifically, as shown in fig. 3, the guide through grooves 44 on the two first operating heads 42a are identical in shape, and are projected along the depth direction of the two guide through grooves 44, and the projections of the two guide through grooves 44 are disposed in a crossed manner, so that when the first pull rod 41a pulls the two first operating heads 42a, the two first operating heads 42a can realize opening and closing actions.

In at least one embodiment, the guide channels 44 extend in an arc.

In the first embodiment, as shown in fig. 4, in order to facilitate the hinge of the first tie bar 41a with the hinge holes 43 in the two first operating heads 42a, the first tie bar 41a is provided with a first pin 45 hinged with the hinge holes 43. In order to facilitate the rotary seat 3 to be rotatably and slidably connected with the guiding through grooves 44 in the two first operating heads 42a, the rotary seat 3 is provided with a second pin 46 which is rotatably and slidably matched with the guiding through grooves 44.

In the first embodiment, as shown in fig. 3 and 4, the rotating base 3 includes a first rotating member 32a and a first limiting cylinder 33a, the first rotating member 32a and the first limiting cylinder 33a have an integral structure, and the second pin 46 is inserted into the first limiting cylinder 33a through the guiding through slot 44.

As shown in fig. 3, the side wall of the first limiting cylinder 33a is further provided with a first avoidance groove 331a, and the first avoidance groove 331a can perform the avoidance function on the deployment actions of the two first operation heads 42 a.

The following describes the use procedure of the endoscopic clip cutting instrument according to the first embodiment with reference to fig. 4:

the first pull rod 41a is pushed leftwards, one first operating head 42a rotates upwards relative to the first pin 45 under the cooperation of the guide through groove 44 and the second pin 46, one first operating head 42a rotates downwards relative to the first pin 45, the two first operating heads 42a are gripped and opened, and then the first pull rod 41a is pulled rightwards, and the two first operating heads 42a are gradually closed.

Embodiment two:

in the second embodiment, as shown in fig. 5 and 6, the operation body 4 includes a pull rod 41 and two operation heads 42, the pull rod 41 is hereinafter referred to as a second pull rod 41b, the operation heads 42 are referred to as second operation heads 42b, the two second operation heads 42b may be forceps heads or scissor heads, and as shown in fig. 5, the two second operation heads 42b are scissor heads, so as to implement shearing of a lesion tissue or an operation auxiliary device, wherein:

the two second operating heads 42b are provided with a hinge hole 43 and a guide through groove 44, the second pull rod 41b penetrates through the connecting piece 1 and stretches into the spiral flexible pipe 2, the second pull rod 41b is in sliding fit with the connecting piece 1 and is in rotary and sliding connection with the guide through groove 44 in the two second operating heads 42b, and the rotating seat 3 is hinged with the hinge holes 43 in the two operating heads 42.

The guide through groove 44 in the second embodiment is similar to the guide through groove 44 in the first embodiment, and will not be described in detail for the sake of brevity.

In the second embodiment, as shown in fig. 6, in order to facilitate the rotation and sliding connection between the second pull rod 41b and the guiding through grooves 44 in the two second operating heads 42b, the second pull rod 41b is provided with a first pin 45 that is in rotation and sliding fit with the guiding through grooves 44. In order to facilitate the articulation of the swivel base 3 with the articulation holes 43 in the two second operating heads 42b, the swivel base 3 is provided with a second pin 46 articulated with the articulation holes 43.

In the second embodiment, as shown in fig. 5 and 6, the rotating base 3 includes a second rotating member 32b and a second limiting cylinder 33b, the second rotating member 32b and the second limiting cylinder 33b are two independent components, the second limiting cylinder 33b extends into the second rotating member 32b to be fixedly connected with the second limiting cylinder 33b, and the second pin 46 is inserted on the second limiting cylinder 33 b.

As shown in fig. 5, the side wall of the second limiting cylinder 33b is further provided with a second avoidance groove 331b, and the second avoidance groove 331b can perform the avoidance function on the deployment actions of the two second operation heads 42 b.

The following describes a procedure of using the endoscopic clip cutting instrument according to the second embodiment with reference to fig. 6:

the second pull rod 41b is pushed to the left, one second operating head 42b rotates upward relative to the second pin 46 under the cooperation of the guide through groove 44 and the first pin 45, one second operating head 42b rotates downward relative to the second pin 46, the two second operating heads 42b are in an open state, and then the second pull rod 41b is pulled to the right, and the two second operating heads 42b are gradually closed.

Embodiment III:

in the third embodiment, as shown in fig. 7 and 8, the operation body 4 includes a cutter head 47, a fastener 48 and an operation wire 49, the cutter head 47 has a cutting end and a connecting end, the cutting end of the cutter head 47 is in a hook shape, the connecting end of the cutter head 47 is slidably disposed in the rotary seat 3 and connected with the operation wire 49 through the fastener 48, and the operation wire 49 extends into the spiral flexible tube 2 through the connector 1.

In the operation process of the existing mucous membrane stripping operation, after the elastic ring pulls the mucous membrane to strip, the stripped pathological tissues are required to be taken out. At this time, as one of the metal clips is fixed on the mucous membrane with the elastic ring, doctors often directly pull the metal clip off the mucous membrane, and the process may cause tearing of the mucous membrane or even bleeding. The above-mentioned operation body 4 can cut the elastic ring in the operation process of the mucosa dissection, and the specific operation is as follows:

during operation, the connecting end of the cutter head 47 can be driven to slide in the rotary seat 3 through the operation wire 49, so that the cutting end of the cutter head 47 extends out of or retracts into the rotary seat 3, the cutter head 47 can be conveyed to a position where an elastic ring needs to be cut after the cutting end extends out of the rotary seat 3, and an operator pulls the operation wire 49 to retract the cutter head 47 after the cutting end of the cutter head 47 hooks the elastic ring, so that cutting is performed. The endoscope lower clamp cutting instrument has the advantages of simple structure, convenient operation, and capability of effectively and reliably cutting off the elastic ring, avoiding tearing off the metal clamp directly in the operation process, and reducing the damage to mucous membranes.

The end surface of the connecting end of the tool bit 47 is provided with a wire feeding hole 471, a side surface of the tool bit 47 is provided with a through hole 472 communicated with the wire feeding hole 471, the through hole 472 can extend along the radial direction of the tool bit 47, the operation wire 49 extends into the through hole 472 through the wire feeding hole 471, and the fastener 48 is inserted into the through hole 472. During the insertion process, the fastener 48 forces the end of the operation wire 49 to bend in the through hole 472, and as the fastener 48 advances, the end of the operation wire 49 is pressed against the inner surface of the through hole 472, so as to connect the operation wire 49 with the cutter head 47.

Specifically, as shown in fig. 7, the longitudinal section of the fastener 48 may be L-shaped, with a long side extending into the through hole 472 for forcing the operation wire 49 to bend and press the operation wire 49 against the inner surface of the through hole 472, and a short side fully or semi-plugged at one end of the through hole 472.

In the third embodiment, as shown in fig. 7 and 8, the rotating base 3 includes a third rotating member 32c and a third limiting cylinder 33c, the third rotating member 32c and the third limiting cylinder 33c are two independent components, the third limiting cylinder 33c extends into the third rotating member 32c to be fixedly connected with the third limiting cylinder 33c, and the cutter head 47 is slidably engaged with the third limiting cylinder 33 c.

As shown in fig. 7, a knife slot 331c is formed on an end surface of the third limiting cylinder 33c, that is, a knife slot 331c is formed on an upper end surface of the third limiting cylinder 33c in fig. 7, and the knife slot 331c is used for allowing a cutting end of the cutter head 47 to enter and exit and limiting the cutting end of the cutter head 47 to rotate relative to the third limiting cylinder 33 c.

When the cutter head 47 needs to cut the elastic ring, the cutter head 47 is pushed to extend out of the cutter groove 331c through the operation wire 49, at this time, the cutter groove 331c limits the cutting end of the cutter head 47 to rotate relative to the third limiting cylinder 33c, and after the cutter head 47 hooks the elastic ring, the cutter head 47 is pulled through the operation wire 49, and the cutter head 47 cuts the elastic ring.

The arrangement of the knife slot 331c plays a role in limiting the knife head 47, and ensures the stability between the knife head 47 and the third limiting cylinder 33c along the circumferential direction of the third limiting cylinder 33 c.

On the basis of the above embodiment, optionally, the end surface of the third limiting cylinder 33c, on which the cutter groove 331c is formed, is a concave arc surface, and the projection of the arc surface along the first direction is an arc line, where the first direction is perpendicular to the cutting surface formed when the cutter head 47 slides relative to the third limiting cylinder 33 c.

On the basis of the above embodiments, as shown in fig. 9, the endoscopic under-clip cutting instrument may further comprise a fixed handle 5 and a movable handle 6 movably connected with the fixed handle 5, wherein the end of the spiral flexible tube 2 facing away from the connecting piece 1 is connected with the fixed handle 5, and the operation body 4 is connected with the movable handle 6. The operator can push and pull the first pull rod 41a, the second pull rod 41b or the operation wire 49 through the movable handle 6 to realize the cutting of the cutter head 47 or the clamping action of the operation head 42.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. The utility model provides a connection structure, its characterized in that, includes connecting piece (1), spiral flexible pipe (2) and roating seat (3), connecting piece (1) with spiral flexible pipe (2) screwed connection, just connecting piece (1) with the contact surface looks adaptation of spiral flexible pipe (2), connecting piece (1) with form spacing annular between spiral flexible pipe (2), roating seat (3) cover is located the outside of connecting piece (1) and with spacing annular normal running fit.

2. The connecting structure according to claim 1, wherein the connecting piece (1) extends into the spiral flexible pipe (2) to be in spiral connection with the spiral flexible pipe (2), and the connecting piece (1) is provided with a through hole (11) along the axis direction of the spiral flexible pipe (2).

3. The connection according to claim 1, characterized in that the swivel (3) is in a clearance fit with the connection piece (1).

4. The connecting structure according to claim 1, characterized in that the end of the connecting piece (1) facing away from the spiral flexible pipe (2) is located in the rotating seat (3), and a mounting hole (31) communicated to the end of the connecting piece (1) is formed in one end of the rotating seat (3) facing away from the spiral flexible pipe (2).

5. The connecting structure according to claim 4, wherein the rotating base (3) comprises a rotating member (32) and a limiting cylinder (33) connected with the rotating member (32), the limiting cylinder (33) and the rotating member (32) are provided with the mounting hole (31), and the rotating member (32) is sleeved outside the connecting member (1) and is in rotary fit with the limiting ring groove.

6. An endoscopic clip cutting instrument, characterized by comprising an operating body (4) and a connecting structure according to any one of claims 1-5, said operating body (4) being movably connected to said swivel (3), said operating body (4) being adapted for performing a surgical operation.

7. The endoscopic undercut apparatus according to claim 6, characterized in that said operating body (4) comprises a pull rod (41) and two operating heads (42), both operating heads (42) being provided with a hinge hole (43) and a guide through slot (44);

one of the pull rod (41) and the rotating seat (3) is hinged with the hinge holes (43) in the two operation heads (42), and the other one is rotationally and slidingly connected with the guide through grooves (44) in the two operation heads (42);

the pull rod (41) penetrates through the connecting piece (1) and stretches into the spiral flexible pipe (2), the pull rod (41) is in sliding fit with the connecting piece (1), and the guide through groove (44) is used for being matched with the rotating seat (3) to drive the two operating heads (42) to be opened and closed under the pushing and pulling of the pull rod (41).

8. Endoscopic clip-on instrument according to claim 7, characterized in that the pull rod (41) is provided with a first pin (45) and the swivel seat (3) is provided with a second pin (46), one of the first pin (45) and the second pin (46) being hinged with the hinge holes (43) in the two operating heads (42) and the other being in a rotating and sliding connection with the guide through slots (44) in the two operating heads (42).

9. The endoscopic clip cutting instrument according to claim 6, wherein the operating body (4) comprises a cutter head (47), a fastener (48) and an operating wire (49), the cutter head (47) has a cutting end and a connecting end, the cutting end of the cutter head (47) is in a hook shape, the connecting end of the cutter head (47) is slidingly arranged in the rotating seat (3) and is connected with the operating wire (49) through the fastener (48), and the operating wire (49) extends into the spiral flexible tube (2) through the connecting piece (1).

10. The endoscopic underclamping instrument according to claim 6, further comprising a fixed handle (5) and a movable handle (6) movably connected to the fixed handle (5), wherein the end of the spiral flexible tube (2) facing away from the connecting piece (1) is connected to the fixed handle (5), and wherein the operating body (4) is connected to the movable handle (6).

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