CN219814243U - Disposable scissors for endoscope - Google Patents

Abstract

The utility model discloses a pair of disposable endoscope scissors, which comprises an operation part, a pushing part and a scissor part, wherein the operation part comprises a core rod and a first finger ring part, the first finger ring part is sleeved outside the core rod and can axially move along the core rod, and an inner cavity is formed in the core rod; the pushing part comprises a spring hose part and a traction steel wire, the spring hose part comprises a first spring hose and a second spring hose, the proximal end of the first spring hose enters the inner cavity of the core rod and is connected with the distal end of the core rod, and the second spring hose is sleeved in the first spring hose; the proximal end of the traction steel wire passes through the second spring hose and is connected with the first ring part, the distal end of the traction steel wire is connected with the scissors part, and the traction steel wire can axially move to draw the scissors part to open and close while the first ring part axially moves along the core rod; the scissors part comprises fixed scissors, movable push rods, long pins and short pins.

Description

Disposable scissors for endoscope

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a pair of disposable scissors for an endoscope.

Background

In current endoscopic surgical procedures, it is clinically desirable to cut an implant device such as a plastic stent, nylon ligature, or the like. However, in clinical application, there is no suitable device for cutting, in the prior art, a disposable mucosa cutting device or a disposable electric snare device is commonly used, and the implantation device to be cut is cut off by high-frequency electric heating burning, but there is a certain risk in the operation. For example, when cutting a nylon ligation wire, the nylon wire is stuck to a mucous membrane portion, and when cutting, the nylon wire is burned by high-frequency electric heating, which is prone to cause erroneous damage, and there is a risk of accident.

Disclosure of Invention

In view of the defects in the prior art, the utility model provides the disposable scissors for the endoscope, which have a simple structure and a unidirectional opening and closing structure, and are not easy to cause accidental injury.

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

a disposable endoscope scissors comprises an operation part, a pushing part and a scissors part, wherein: the operation part comprises a core bar and a first finger ring part, the first finger ring part is sleeved outside the core bar and can axially move along the core bar, and the core bar is provided with an inner cavity; the pushing part comprises a spring hose part and a traction steel wire, the spring hose part comprises a first spring hose and a second spring hose, the proximal end of the first spring hose enters the inner cavity of the core rod and is connected with the distal end of the core rod, and the second spring hose is sleeved in the first spring hose; the proximal end of the traction steel wire passes through the second spring hose and is connected with the first ring part, the distal end of the traction steel wire is connected with the scissors part, and the traction steel wire can axially move to draw the scissors part to open and close while the first ring part axially moves along the core rod; the scissors portion includes fixed scissors, movable push rod and pin subassembly, and movable push rod is connected with the distal end of traction steel wire, and pin subassembly includes long pin and short pin, and scissors portion includes fixed scissors, movable push rod, long pin and short pin, and long pin is with fixed scissors and movable scissors connection, and short pin is with movable scissors and movable push rod's distal end connection, and movable push rod's proximal end is connected with traction steel wire.

Preferably, the core bar comprises a scissors connecting part and a rod seat, wherein an inner cavity is formed in the scissors connecting part, and the scissors connecting part can be connected with the first spring hose; the rod seat is provided with a sliding groove which radially penetrates to the outer peripheral surface and axially extends; the inner cavity of the scissors connecting part is axially communicated with the sliding groove;

preferably, the first ring portion includes a first ring holding portion and a sliding portion, the first ring holding portion is formed with an inner cavity, the sliding portion is disposed in the inner cavity of the first ring holding portion, and the sliding portion can move axially along a sliding groove of the core bar under the driving of the first ring holding portion.

Preferably, the inner wall of the first finger ring holding part is provided with a plurality of protruding blocks, the corresponding position of the outer periphery of the sliding part is provided with a plurality of protruding block clamping grooves, and the protruding blocks can be clamped with the protruding block clamping grooves so as to connect the sliding part with the first finger ring holding part.

Preferably, the sliding part comprises an upper fixing clamping piece and a lower fixing clamping piece which can be mutually butted, the upper fixing clamping piece is provided with an upper guiding half groove, the lower fixing clamping piece is provided with a lower guiding half groove, the upper guiding half groove and the lower guiding half groove form a guiding groove after being butted, and the guiding groove can be used for inserting the traction steel wire and is connected with the sliding part.

Preferably, the fixed upper buckle piece comprises an upper semicircular piece and a buckle convex rib, wherein the proximal end of the buckle convex rib is connected with the inner wall of the upper semicircular piece, and the distal end of the buckle convex rib extends out of the upper semicircular piece; the fixed lower buckle piece comprises a lower semicircular piece and a supporting convex rib, the proximal end of the supporting convex rib is connected with the inner wall of the lower semicircular piece, and the distal end of the supporting convex rib extends out of the lower semicircular piece; the two ends of the upper semicircular piece and the lower semicircular piece can be mutually butted, and the buckle convex rib and the support convex rib can be mutually butted; the upper guide half groove and the lower guide half groove are respectively arranged on one side of the buckle convex rib and one side of the support convex rib, which are mutually butted.

Preferably, the long boss and the short boss are arranged at the far end of the buckle convex rib from far to near, the boss clamping groove is arranged at the position corresponding to the position of the far end of the support convex rib and the short boss, the long boss can be buckled at the outer side of the far end of the support convex rib, and the short boss can be buckled at the boss clamping groove of the support convex rib.

Preferably, the upper guide half groove and the lower guide half groove have the same structure, and the lower guide half groove is provided with a large guide groove section and a small guide groove section which are communicated from far to near, and the diameter of the large guide groove section is larger than that of the small guide groove section.

Preferably, the operating portion further comprises a second finger ring portion, the second finger ring portion being connected to the proximal end of the core.

Preferably, the second finger ring portion is provided with a connecting hole; the core rod further comprises a finger ring connecting part, and the finger ring connecting part is connected with the proximal end of the rod seat; the finger ring connecting part comprises a rod part connected with the proximal end of the rod seat and a rod cap connected with the rod part, the rod part and the rod cap can be inserted into the connecting hole, and the diameter of the rod cap is larger than that of the rod part; the finger ring connecting part penetrates through the outer peripheral surface along the radial direction of the rod cap and axially extends to the direction of the rod part, and a plurality of telescopic grooves are formed and can be compressed and released, so that the connection between the core rod and the second finger ring part is realized.

The disposable scissors for the endoscope have a simple structure, and can be flexibly operated by an operator. In addition, under the mode of shearing the nylon rope of the purse, when the nylon rope is used for tying the mucous membrane, the disposable scissors for the endoscope are unidirectionally opened and closed, and the scissors can be opened first to be inserted into a gap between the mucous membrane and the nylon rope and then closed, so that accidental injury can not be caused.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a perspective view of a pair of disposable endoscope scissors according to an embodiment of the present utility model.

Fig. 2 is an exploded view of the disposable endoscope scissors according to the embodiment of the present utility model.

Fig. 3 is an assembly schematic diagram of a first ring portion and a sliding portion of a pair of disposable endoscope scissors according to an embodiment of the present utility model, wherein an upper diagram is a schematic diagram after the first ring portion is assembled and before the sliding portion is assembled, a middle diagram is a schematic diagram after the first ring portion is assembled and after the sliding portion is connected, and a lower diagram is a schematic diagram after the first ring portion and the sliding portion are assembled.

Fig. 4 is a diagram showing the structure of a movable push rod of the disposable endoscope scissors according to the embodiment of the present utility model.

Fig. 5 is a view showing a structure of movable scissors of the disposable endoscope scissors according to the embodiment of the present utility model.

Fig. 6 is a view showing a structure of a fixed scissors of the disposable endoscope scissors according to the embodiment of the present utility model.

Detailed Description

The technical scheme of the utility model is further specifically described below through examples and with reference to the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of embodiments of the present utility model with reference to the accompanying drawings is intended to illustrate the general inventive concept and should not be taken as limiting the utility model.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in the drawings in order to simplify the drawings.

In the embodiment of the present utility model, the "proximal" refers to an end close to the operator, and the "distal" refers to an end far from the operator.

According to one general technical concept of the present utility model, there is provided a disposable endoscope scissors including an operation part, a pushing part, and a scissors part. The operation part comprises a core bar and a first finger ring part, the first finger ring part is sleeved outside the core bar and can axially move along the core bar, and the core bar is provided with an inner cavity. The pushing part comprises a spring hose part and a traction steel wire, the spring hose part comprises a first spring hose and a second spring hose, the proximal end of the first spring hose enters the inner cavity of the core rod and is connected with the distal end of the core rod, and the second spring hose is sleeved in the first spring hose; the proximal end of the traction steel wire penetrates through the first spring hose and is connected with the first ring part, the traction steel wire can axially move along the core rod while the traction scissor part is opened and closed, and the distal end of the traction steel wire is connected with the scissor part. The scissors portion includes fixed scissors, movable push rod and pin subassembly, and the scissors portion includes fixed scissors, movable push rod, long pin and short pin, and long pin is with fixed scissors and movable scissors connection, and short pin is with movable scissors and movable push rod's distal end connection, and movable push rod's proximal end is connected with traction steel wire.

Fig. 1 illustrates a perspective view of a pair of disposable endoscope scissors according to an exemplary embodiment of the present utility model.

As shown in fig. 1, in the embodiment of the present utility model, the disposable endoscope scissors include an operation unit 100, a pushing unit 200, and a scissors unit 300.

In an embodiment of the present utility model, the operation portion 100 includes a stem 110 and a first ring portion 120. The first finger ring 120 is sleeved outside the core rod 110 and can move along the axial direction of the core rod 110, and the core rod 110 is formed with an inner cavity. The operator applies a force to the first finger ring 120, which moves the first finger ring 120 axially along the stem 110.

As shown in fig. 1-2, in some preferred embodiments, the mandrel 110 includes a scissors connection 111 and a stem seat 112, the scissors connection 111 being disposed at a distal end of the mandrel 110. The scissors connecting portion 111 is formed with an inner cavity, and the first spring tube 211 may be inserted into the inner cavity of the scissors connecting portion 111 and connected thereto, for example, may be fixedly connected by means of glue bonding or the like. The lever seat 112 is provided with a slide groove 113 extending axially and penetrating to the outer peripheral surface in the radial direction thereof, and the slide groove 113 axially penetrates the inner cavity of the scissors connecting portion 111. After the two are axially penetrated, the traction steel wire 220 can be inserted into the sliding groove 113 from the inner cavity of the scissors connecting part 111.

In some preferred embodiments, the first ring portion 120 includes a first ring grip 121 and a sliding portion 122. The first finger ring holding part 121 has an inner cavity, the sliding part 122 is disposed in the inner cavity of the first finger ring holding part, and the sliding part 122 is connected to the first finger ring holding part 121 and is movable axially along the sliding groove 113 of the core bar 110 under the driving of the first finger ring holding part 121. For example, as shown in fig. 1, the first finger ring holding part 121 has an i-shaped cylindrical structure, the proximal end and the distal end of the cylinder are not closed, and the structure is convenient for an operator to hold. The cylinder is provided with an inner cavity into which the sliding portion 122 is inserted and connected.

As shown in fig. 2, in some preferred embodiments, a plurality of protrusions 121a are provided on the inner wall of the first finger ring holding portion 121, and a plurality of protrusion clamping grooves 121b are provided at corresponding positions on the outer periphery of the sliding portion 122, wherein the protrusions 121a can be clamped with the protrusion clamping grooves 121b to connect the sliding portion 122 with the first finger ring holding portion 121.

In some preferred embodiments, the sliding portion 122 includes a fixed upper latch 122a and a fixed lower latch 122b that can be abutted with each other. An upper guide half groove (not shown) is provided in the fixed upper fastening part 122a, and a lower guide half groove 122c is provided in the fixed lower fastening part 122b, and the upper guide half groove and the lower guide half groove 122c are butted to form a guide groove. The guiding groove can be used for inserting the traction steel wire 220 and connecting with the sliding part 122, after the traction steel wire 220 is connected with the sliding part 122, the traction steel wire 220 is connected with the first ring holding part 121 which can drive the sliding part 122 to axially move, so that the first ring holding part 121 can axially move under the operation of the first ring holding part, and the scissors 300 can be opened and closed.

In some preferred embodiments, the fixed upper snap 122a comprises an upper semicircular member 122a (1) and a snap bead 122a (2), wherein the proximal end of the snap bead 122a (2) is connected to the inner wall of the upper semicircular member 122a (1), and the distal end of the snap bead 122a (2) extends out of the upper semicircular member 122a (1). The fixed lower fastening member 122b includes a lower semicircular member 122b (1) and a supporting rib 122b (2), wherein a proximal end of the supporting rib 122b (2) is connected to an inner wall of the lower semicircular member 122b (1), and a distal end of the supporting rib 122b (2) extends out of the lower semicircular member 122b (1). The two ends of the upper semicircular ring piece 122a (1) and the lower semicircular ring piece 122b (1) can be butted with each other to form a ring after being butted. The fastening ribs 122a (2) and the supporting ribs 122b (2) may be abutted to each other, and the upper guide half groove (not shown) and the lower guide half groove 122c are respectively disposed at one side of the fastening ribs 122a (2) and the supporting ribs 122b (2) where they are abutted to each other, and form guide grooves after being abutted to each other. After the upper fastening member 122a is abutted with the lower fastening member 122b, the upper fastening member can be fixedly connected with the traction steel wire 220, so as to drive the traction steel wire 220 to axially move.

In some preferred embodiments, the snap bead 122a (2) is provided with a long boss 125 and a short boss 126 from far to near, where from far to near refers to from the distal side to the proximal side of the snap bead 122a (2). The boss clamping grooves 127 are formed in positions, corresponding to the positions of the supporting ribs 122b (2) and the short bosses 126, of the long bosses 125 can be buckled on the outer sides of the distal ends of the supporting ribs 122b (2), the short bosses 126 can be buckled on the boss clamping grooves 127 of the supporting ribs 122b (2), and after the long bosses 125 and the short bosses 126 are buckled, the butt joint connection of the upper semicircular ring piece 122a (1) and the lower semicircular ring piece 122b (1) can be achieved.

By way of example, the proximal end of the snap bead 122a (2) is disposed at the center of the upper semicircular piece 122a (1), and the proximal end of the support bead 122b (2) is also disposed at the center of the lower semicircular piece 122b (1).

To facilitate guiding the traction wire 220, in the embodiment of the present utility model, the upper guiding half groove (not shown) and the lower guiding half groove 122c are identical in structure, and the lower guiding half groove 122c is provided with a large guiding groove section 122c (1) and a small guiding groove section 122c (2) which are penetrated from far to near, respectively, and the diameter of the large guiding groove section 122c (1) is larger than that of the small guiding groove section 122c (2). The different sized arrangements may limit the sliding of the traction wire 200 within the groove.

As shown in fig. 3, in the embodiment of the present utility model, the first finger grip 121 is sleeved on the outside of the stem 110 from the distal end of the stem 110 and then moves proximally along the outside of the stem 110 to the stem base 112 when assembled. Next, the sliding portion 122 is assembled, the support rib 122b (2) for fixing the lower fastening member 122b is inserted into the sliding groove 113 of the lever base 112 from the bottom of the lever base 112, and both ends of the lower semicircular ring member 122b (1) for fixing the lower fastening member 122b are fastened to the outer periphery of the lever base 112 with the insertion of the support rib 122b (2) into the sliding groove 113. Similarly, the fastening bead 122a (2) for fixing the upper fastening member 122a is inserted into the sliding groove of the rod seat 112 from the top of the rod seat 112, and the two ends of the upper semicircular ring member 122a (1) for fixing the upper fastening member 122a are fastened to the outer periphery of the rod seat 112 along with the insertion of the fastening bead 122a (2) into the sliding groove 113. After the fixed lower fastening member 122b and the fixed upper fastening member 122b are inserted into the sliding groove 113, the fixed lower fastening member 122b is connected to the fixed upper fastening member 122b by fastening the long boss 125 and the short boss 126. After the fixed lower fastening part 122b is connected with the fixed upper fastening part 122b, the fixed lower fastening part moves proximally along the core bar 110, and then is inserted into the inner cavity of the first finger ring holding part 121 and connected with the inner cavity. After the first finger grip 121 is connected to the sliding portion 123, when the operator moves the first finger grip 121, the sliding portion 123 and the traction wire 220 connected to the sliding portion 123 can be driven to move, and then the scissors 300 can be pulled to open and close. When the traction wire 220 is assembled, it extends into the inner cavity of the core 110 from the distal end of the core 110, and then is connected with the fixed lower buckle 122b through the guide groove provided between the fixed lower buckle 122b and the fixed upper buckle 122b before the fixed lower buckle is connected.

In the embodiment of the present utility model, the order of assembling the first ring holding portion 121 and the sliding portion 123 is not limited, and the sliding portion 123 may be assembled first, then the first ring holding portion 121 may be assembled, and then the sliding portion 123 may be connected to the first ring holding portion 121. The assembly sequence of the fixed upper buckle 122a and the fixed lower buckle 122b is not limited, and they may be assembled together and then assembled with the core pin 110 (or the rod seat 112), specifically, may be assembled according to practical situations.

In some preferred embodiments, the handle portion 100 further includes a second finger ring 130, the second finger ring 130 being coupled to the proximal end of the stem 110.

In some preferred embodiments, the stem 110 further includes a finger ring connection 113, the finger ring connection 113 being connected to the proximal end of the stem block 112. The finger ring connection portion 113 includes a stem portion 113a connected to the proximal end of the stem 112 and a stem cap 113b connected to the stem portion 113a, the stem cap 113b having a larger diameter than the stem portion 113 a. The connection portion of the second finger ring 130 is provided with a connection hole into which the extruded stem cap 113b and stem 113a are inserted. The finger ring connection portion 113 is provided with a plurality of expansion grooves 114 penetrating to the outer circumferential surface in the radial direction of the stem cap 113b and extending axially to the stem portion 113a, and the expansion grooves 114 can be compressed and released to thereby connect the stem 110 with the second finger ring portion 130. The different diameters of the structures allow the compressed stem cap 113b to be released after entering the connection hole of the second finger ring portion 130, thereby being snapped at the connection hole. The telescopic structure is convenient for installing and connecting the core bar 110 and the second finger ring part 130, and the installed core bar 110 can also rotate relative to the second finger ring part 130, so that an operator can rotate the core bar 110 according to actual conditions, and then adjust the direction of scissors. As an example, two or four expansion slots intersecting in a cross may be provided.

In an embodiment of the present utility model, the propulsion section 200 includes a spring hose section 210 and a traction wire 220. The spring hose portion 210 includes a first spring hose 211 and a second spring hose 212, the proximal end of the first spring hose 211 enters the lumen of the stem 110 and is connected to the distal end of the stem 110, and the second spring hose 212 is sleeved in the first spring hose 211. The purpose of the spring hose portion 210 is to protect the traction wire 220 from being broken or to facilitate resetting even if it is excessively bent, for example, in the case that the core bar 110 and the pushing portion 200 are at an extreme 90 degrees, such as the springless hose portion 210, there is a risk that the traction wire 220 will be broken or excessively bent and cannot be reset. The proximal end of the traction wire 220 passes through the second spring hose 212 and connects to the first finger ring 120, and the distal end of the traction wire 220 connects to the scissor section 300. After the traction steel wire 220 is connected with the first ring portion 120 and the scissor portion 300, the traction steel wire 220 can axially move while the first ring portion 120 axially moves along the core bar 110, so as to draw the scissor portion 300 to open and close.

As shown in fig. 4 to 6, in the embodiment of the present utility model, the scissors section 300 includes a fixed scissors 310, a movable scissors 320, a movable push rod 330, a long pin (340) and a short pin (350). The long pin 340 connects the fixed scissors 310 with the movable scissors 320, the short pin 350 connects the movable scissors 320 with the distal end of the movable push rod 330, and the proximal end of the movable push rod 330 is connected with the traction wire 220.

The proximal end of the movable push rod 330 is connected to the distal end of the traction wire 220, for example, by welding.

The distal end of the movable push rod 330 is provided with a first through hole 331, the proximal end of the movable scissors 320 is provided with a second through hole 321 and a third through hole 322, and both sides of the fixed scissors 310 are provided with a fourth through hole 311 and a fifth through hole (not shown). The distal end of the movable push rod 330 is inserted into the proximal end of the movable scissors 320, and the short pin 350 penetrates the first penetration 331 of the movable push rod 330 and the second penetration 321 of the movable scissors 320, thereby connecting the movable push rod 330 with the movable scissors 320. The purpose of the short pin 350 is to limit the overspray of the scissor edge. The long pin 340 penetrates the fourth penetration hole 311 of the fixed scissors 310, the third penetration hole 322 of the movable scissors 320, and the fifth penetration hole (not shown) of the fixed scissors 310, thereby connecting the fixed scissors 310 with the movable scissors 320. The proximal ends of the stationary scissors 310 are fixedly connected to the distal ends of the spring hose portions 210 by welding. After the traction wire 220 drives the movable push rod 330 to move, the movable scissors 320 are pushed to move by the connection of the short pin 350 to form a hinge to rotate the scissors to open, and vice versa. The purpose of the short pin 350 is to limit the overspray of the scissor edge.

The disposable endoscope scissors provided by the embodiment of the utility model are operated in a pure mechanical structure, and a clinical operator can flexibly and controllably operate in the operation process without being influenced by other devices and other factors, and especially can realize fine operation when stripping sticky tissues or tissues with abundant surrounding blood vessels. In addition, when the nylon rope is used for cutting the purse string nylon rope and the mucous membrane is tied by the nylon rope, the disposable scissors for the endoscope are opened and closed unidirectionally, so that the scissors can be opened first to be inserted into a gap between the mucous membrane and the nylon rope, and then the scissors are closed, so that accidental injury can not be caused. Compared with the cutting mode of using other high-frequency electrical machinery to utilize high firing, the surgical risk is greatly reduced.

Those skilled in the art will appreciate that the embodiments described above are exemplary and that modifications may be made by those skilled in the art, and that the structures described in the various embodiments may be freely combined without conflict in terms of structure or principle.

Although the present utility model has been described with reference to the accompanying drawings, the examples disclosed in the drawings are intended to illustrate preferred embodiments of the utility model and are not to be construed as limiting the utility model.

Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims (11)

1. The utility model provides a disposable scissors for endoscope, includes operating portion, advancing part and scissors portion, its characterized in that:

the operation part comprises a core bar and a first finger ring part, the first finger ring part is sleeved outside the core bar and can axially move along the core bar, and an inner cavity is formed in the core bar;

the pushing part comprises a spring hose part and a traction steel wire, the spring hose part comprises a first spring hose and a second spring hose, the proximal end of the first spring hose enters the inner cavity of the core rod and is connected with the distal end of the core rod, and the second spring hose is sleeved in the first spring hose; the proximal end of the traction steel wire penetrates through the second spring hose and is connected with the first ring part, the distal end of the traction steel wire is connected with the scissors part, and the traction steel wire can axially move to draw the scissors part to open and close while the first ring part axially moves along the core rod;

the scissors portion includes fixed scissors, movable push rod, long pin and short pin, long pin will fixed scissors with movable scissors is connected, short pin will movable scissors with movable push rod's distal end is connected, movable push rod's proximal end with traction steel wire connects.

2. The disposable endoscope scissors according to claim 1, wherein the core bar comprises a scissors connecting portion and a rod seat, the scissors connecting portion is formed with an inner cavity, and the scissors connecting portion is connectable with the first spring hose; the rod seat is provided with a sliding groove which penetrates to the outer peripheral surface along the radial direction of the rod seat and extends axially; the inner cavity of the scissors connecting part is axially communicated with the sliding groove.

3. The pair of disposable endoscope scissors according to claim 2, wherein the first ring portion includes a first ring holding portion having an inner cavity and a sliding portion provided in the inner cavity of the first ring holding portion, the sliding portion being movable axially along a sliding groove of the core rod under the drive of the first ring holding portion.

4. The pair of disposable endoscope scissors according to claim 3, wherein a plurality of projections are provided on an inner wall of the first ring holding portion, a plurality of projection engaging grooves are provided on a position corresponding to an outer periphery of the sliding portion, and the projections are engageable with the projection engaging grooves to connect the sliding portion and the first ring holding portion.

5. The pair of disposable endoscope scissors according to claim 3 or 4, wherein the sliding portion comprises an upper fixing clip and a lower fixing clip which can be abutted to each other, the upper fixing clip is provided with an upper guiding half groove, the lower fixing clip is provided with a lower guiding half groove, the upper guiding half groove and the lower guiding half groove are abutted to form a guiding groove, and the guiding groove can be used for the traction steel wire to be inserted into and connected with the sliding portion.

6. The pair of disposable endoscope scissors according to claim 5, wherein the fixed upper buckle member comprises an upper semicircular member and a buckle rib, a proximal end of the buckle rib is connected with an inner wall of the upper semicircular member, and a distal end of the buckle rib extends out of the upper semicircular member; the fixed lower buckle piece comprises a lower semicircular piece and a supporting convex rib, the proximal end of the supporting convex rib is connected with the inner wall of the lower semicircular piece, and the distal end of the supporting convex rib extends out of the lower semicircular piece; the two ends of the upper semicircular piece and the lower semicircular piece can be mutually butted, and the clamping convex ribs and the supporting convex ribs can be mutually butted; the upper guide half groove and the lower guide half groove are respectively arranged on one side of the buckle convex rib and one side of the support convex rib, which are in butt joint with each other.

7. The pair of disposable endoscope scissors according to claim 6, wherein a long boss and a short boss are respectively provided at a distal end of the locking rib from far to near, a boss locking groove is provided at a position corresponding to the short boss at the distal end of the supporting rib, the long boss is locked at an outer side of the distal end of the supporting rib, and the short boss is locked at the boss locking groove of the supporting rib.

8. The pair of disposable endoscope scissors according to claim 7, wherein the upper guide half groove and the lower guide half groove have the same structure, and the lower guide half groove is provided with a large guide groove section and a small guide groove section which are penetrated from far to near, respectively, and the diameter of the large guide groove section is larger than that of the small guide groove section.

9. The disposable endoscope scissors according to claim 1, wherein said operating portion further comprises a second finger ring portion, said second finger ring portion being connected to a proximal end of the core rod.

10. A pair of disposable endoscope scissors according to claim 2 or 3, wherein said operating portion further comprises a second finger ring portion, said second finger ring portion being connected to the proximal end of the core rod.

11. The pair of disposable endoscope scissors according to claim 10, wherein the second finger ring portion is provided with a connecting hole; the core rod further comprises a finger ring connecting part, and the finger ring connecting part is connected with the proximal end of the rod seat; the finger ring connecting part comprises a rod part connected with the proximal end of the rod seat and a rod cap connected with the rod part, the rod part and the rod cap can be inserted into the connecting hole, and the diameter of the rod cap is larger than that of the rod part; the finger ring connecting part penetrates through the outer peripheral surface along the radial direction of the rod cap and axially extends to the direction of the rod part, and a plurality of telescopic grooves are formed, and can be compressed and released so as to realize connection of the core rod and the second finger ring part.