CN218870410U - Endoscope catheter shearing device capable of passing guide wire - Google Patents

Abstract

The utility model discloses a can cross pipe shearing mechanism for endoscope of seal wire, it includes handle assembly, shearing assembly, spring pipe and cable, shearing assembly includes knife rest and cutter, the spring pipe is located between handle assembly and the knife rest, the cable is connected between cutter and handle assembly, the cutter is rotationally connected with the knife rest, shearing assembly still includes supplementary blade, set up flutedly on the knife rest, supplementary blade fixed mounting is in the bottom of recess, the cooperation is cuted with supplementary blade to the cutter, one side of cutter orientation supplementary blade sets up to the arc structure. The utility model discloses a can cross pipe shearing mechanism for endoscope of seal wire, the cutter sets up to the arc structure, multiplicable and plastic pipe's contact radian, and has reduced the risk of pipe slippage, and simultaneously, the pipe is cuted jointly to cutter and auxiliary blade, has reduced the shearing degree of difficulty, more is favorable to the user to operate.

Description

Endoscope catheter shearing device capable of passing guide wire

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a catheter shearing device for an endoscope, which can cross a guide wire.

Background

In Endoscopic minimally invasive surgery, especially Endoscopic Nasobiliary Drainage (ENBD), a portion of a plastic catheter remaining in a patient is sometimes cut off to meet the surgical needs. The Chinese patent with the publication number of CN202821461U discloses a device for shearing a plastic catheter under an endoscope, and the technology ends the situation that no medical instrument capable of completing the functions exists in the original market. However, in the above technology, although the cutter holder is provided with the semicircular notch for placing the plastic catheter, the blade of the blade is in a linear state, so that the stability of the plastic catheter is still poor during shearing, the catheter is easy to roll, and a great slip risk exists. In addition, the device only has one blade, the acting force applied to the blade by the handle assembly during cutting is limited, the cutting difficulty is high, and the catheter is not easy to cut quickly and easily.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: among the prior art, the cutting part of blade is linear state, appears the condition of pipe slippage easily, and only has a blade, and it is limited that it exerts the effort on the pipe, and the shearing degree of difficulty is great, based on this, the utility model provides a when cuting pipe be difficult for the slippage and be favorable to the user to cut the pipe shearing mechanism for endoscope that can cross the seal wire.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a can cross pipe shearing mechanism for endoscope of seal wire, includes handle components, cuts subassembly, spring pipe and cable, it includes knife rest and cutter to cut the subassembly, the spring pipe is located handle components with between the knife rest, the cable is connected the cutter with between the handle components, the cutter with the knife rest rotationally is connected, it still includes auxiliary blade to cut the subassembly, set up the recess on the knife rest, auxiliary blade fixed mounting is in the bottom of recess, the cutter with auxiliary blade cuts the cooperation, one side that the cutter faced auxiliary blade sets up to the arc structure.

Further, the knife rest is of a cylindrical structure, a mounting groove penetrating through two opposite side walls of the knife rest is formed in the knife rest, a fixed shaft is fixedly connected into one end of the mounting groove, and the cutter is rotatably sleeved on the fixed shaft.

Further, the auxiliary blade is fixedly installed on one of the groove walls of the installation groove.

Furthermore, a limiting block is fixedly installed in one end, far away from the fixed shaft, of the installation groove, and the end portion of the cutter can abut against the limiting block.

Furthermore, an opening communicated with the mounting groove is formed in one end, close to the spring tube, of the tool rest, and one end of the inhaul cable penetrates through the opening and then is hooked on the cutter.

Further, keep away from on the knife rest the one end fixedly connected with bolster of spring tube, the head of bolster sets up to the hemisphere face, the slope has seted up the wire guide hole on the bolster, the one end in wire guide hole link up the lateral wall of bolster, the other end in wire guide hole link up the tip of bolster.

Furthermore, one end of the spring tube is rotatable relative to the handle assembly, one end of the pull cable penetrates through the spring tube and then is fixedly connected with the handle assembly, the catheter shearing device for the endoscope capable of passing the guide wire further comprises a rotating assembly, the rotating assembly comprises a transition sleeve, a connecting sleeve and a connecting cover, the connecting sleeve is rotatably sleeved outside the transition sleeve and is fixedly connected with one end of the spring tube, and the connecting cover is rotatably sleeved outside the transition sleeve and is fixedly connected with one end of the cutter rest.

Furthermore, the handle assembly comprises a core bar, a sliding handle, a fixing clamp, an auxiliary tube and an end cover, the sliding handle is slidably sleeved outside the core bar, the end cover is installed at one end of the core bar, the fixing clamp is installed on the sliding handle, one end of the auxiliary tube is fixedly connected with the fixing clamp, the other end of the auxiliary tube is fixedly connected with the inhaul cable, and one end of the spring tube is fixedly connected with the end cover.

Furthermore, a sliding groove which is communicated with the two opposite side walls of the core bar is formed in the side wall of the core bar along the axial direction, the fixing clamp is of a structure shaped like a Chinese character ji, two free ends of the fixing clamp extend outwards to form a clamping and embedding portion, a clamping groove is formed in the side wall of the sliding handle, the fixing clamp is fixedly contained in the sliding handle, and the clamping and embedding portion penetrates through the sliding groove and then is clamped into the clamping groove.

Furthermore, the relative lateral wall epirelief of fixation clamp is equipped with the backstop arch, two be formed with the clearance between the backstop arch, the one end fixedly connected with backstop pipe of auxiliary tube, the auxiliary tube passes the clearance, the backstop pipe is located the backstop arch is kept away from the one end of end cover, just the tip of backstop pipe with the protruding counterbalance of backstop is held.

The utility model has the advantages that: the utility model provides a can cross pipe shearing mechanism for endoscope of seal wire has following effect:

1. the cutting edge part of the cutter is set to be an arc-shaped structure, so that the contact radian of the cutter and the outer circular surface of the plastic conduit is increased, the rapid shearing is facilitated, meanwhile, the arc-shaped structure on the cutter is matched with the groove with the upward opening, the plastic conduit can be limited in the space formed by the cutter and the groove, and the risk of conduit slipping is reduced;

2. when shearing the plastic catheter, the cutter and the auxiliary blade can shear the catheter from the upper direction and the lower direction simultaneously, so that the shearing difficulty is reduced, and the operation of a user is facilitated.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a perspective view of a catheter cutting device for an endoscope through which a guide wire can be passed according to a first embodiment of the present invention;

FIG. 2 is a partially exploded view of the guide tube shearing device for the over-the-wire endoscope shown in FIG. 1;

FIG. 3 is a perspective view from another perspective of the core rod shown in FIG. 2;

FIG. 4 is an enlarged partial view of a portion A of the guide wire passable catheter cutting device for an endoscope shown in FIG. 1;

FIG. 5 is a partially enlarged view of a portion B of the guide wire passable catheter cutting device for an endoscope shown in FIG. 2;

FIG. 6 is a schematic view showing a connection structure between a cutting assembly and a cable in the guide wire passable catheter cutting device for an endoscope shown in FIG. 1;

FIG. 7 is a perspective view of a catheter shearing apparatus for an endoscope through which a guide wire can be passed according to a second embodiment of the present invention;

FIG. 8 is an enlarged view of a portion of FIG. 7 at C;

FIG. 9 is a front view of the guide wire passable catheter shearing device for an endoscope shown in FIG. 7;

FIG. 10 is a cross-sectional view taken along D-D of FIG. 9;

fig. 11 is a partial enlarged view at E in fig. 10;

FIG. 12 is an enlarged view of a portion of FIG. 10 at F;

FIG. 13 is a partially exploded view of the shear assembly, cable and rotating assembly coupling structure of FIG. 7.

In the figure: 10. the handle assembly comprises a handle assembly 11, a core rod 111, a first pull ring 112, a sliding groove 113, a through groove 12, a sliding handle 121, a second pull ring 122, a clamping groove 13, a fixing clamp 131, a clamping embedding part 132, a stopping protrusion 1321, a gap 1322, a limiting groove 14, an auxiliary tube 141, a stopping tube 15, an end cover 20, a shearing assembly 21, a tool rest 211, a groove 212, a mounting groove 213, a fixing shaft 214, a limiting shaft 22, a cutter 221, a butting part 23, an auxiliary blade 24, a buffer 241, a guide wire hole 30, a spring tube 40, a guy cable 50, a rotating assembly 51, a transition sleeve 511, a butting protrusion 512, a butting edge 52, a connecting sleeve 521, a butting edge 53, a connecting cover 114, a guide wire accommodating cavity 16, a rotating sleeve 215 and a limiting block.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

Example one

Referring to fig. 1 to 4, the present invention provides a catheter cutting device for an endoscope, which can pass a guide wire, comprising a handle assembly 10, a cutting assembly 20, a spring tube 30 and a pulling cable 40, wherein the spring tube 30 is connected between the handle assembly 10 and the cutting assembly 20 and sleeved outside the pulling cable 40, and the pulling cable 40 is connected to the cutting assembly 20 for controlling the cutting action of the cutting assembly 20.

The handle assembly 10 comprises a core bar 11, a sliding handle 12, a fixing clamp 13, an auxiliary tube 14 and an end cover 15, wherein the sliding handle 12 is slidably sleeved outside the core bar 11, the end cover 15 is fixedly installed at one end of the core bar 11, the fixing clamp 13 is installed on the sliding handle 12, one end of the auxiliary tube 14 is fixedly connected with the fixing clamp 13, the other end of the auxiliary tube 14 penetrates through the end cover 15 and then is fixedly connected with a pull cable 40, and one end of a spring tube 30 is fixedly connected with the end cover 15. When the device is used, a user slides the sliding handle 12 relative to the core rod 11 to drive the fixing clamp 13 to move, so that the auxiliary tube 14 is driven to move, the auxiliary tube 14 can drive the inhaul cable 40 to move when moving, and the shearing assembly 20 can be controlled to shear when the inhaul cable 40 moves.

Specifically, core bar 11 is roughly a cylindrical structure, slide handle 12 is a sleeve-shaped structure with two through ends, slide handle 12 can slide along the axial direction of core bar 11, for user operation convenience, the one end of core bar 11 far away from end cover 15 is provided with first pull ring 111, all be provided with second pull ring 121 on the relative both sides wall of slide handle 12, wherein, first pull ring 111 is used for supplying user's thumb to insert, two second pull rings 121 are used for supplying user's forefinger and middle finger to insert, three fingers cooperate each other to realize that slide handle 12 slides relative to core bar 11.

Referring to fig. 2 and 5, the fixing clip 13 is substantially shaped like a Chinese character ji, two free ends of the fixing clip 13 extend outward to form an embedded portion 131, the side wall of the sliding handle 12 is provided with a slot 122, the fixing clip 13 is fixedly accommodated in the sliding handle 12, and the embedded portion 131 penetrates through the sliding slot 112 and then is inserted into the slot 122. In the present embodiment, the fixing clip 13 is made of an elastic material, for example, the fixing clip 13 is an integrally formed plastic piece, when a user presses the fixing clip 13 inward, the fixing clip 13 can be deformed, so that the two clamping portions 131 are close to each other, and when the pressing force on the fixing clip 13 is released, the fixing clip 13 can be restored to its original shape, so as to be clamped into the clamping groove 122, so that the fixing clip 13 is fixedly connected to the sliding handle 12. When the user slides the sliding handle 12, the engaging portion 131 slides along the sliding slot 112, thereby restricting the sliding handle 12 from rotating relative to the core rod 11.

During the assembly, firstly, the sliding handle 12 is sleeved on the core bar 11 through one end of the core bar 11, then the fixing clamp 13 is placed into the sliding groove 112 from one side of the core bar 11, then the fixing clamp 13 is held between the fingers and the fixing clamp 13, the fixing clamp 13 is inserted into the sliding handle 12, when the clamping and embedding part 131 moves to be aligned with the clamping groove 122, the clamping and embedding part 131 is clamped into the clamping groove 122, and therefore the assembly is completed, and the operation is simple and convenient. Referring to fig. 3, in order to prevent the auxiliary tube 14 from entering the core rod 11 during the process of placing the fixing clip 13 into the sliding slot 112, a through slot 113 communicating with the sliding slot 112 is formed on the side wall of the core rod 11 near one end of the end cover 15, so that the auxiliary tube 14 and the fixing clip 13 can be synchronously fed into the core rod 11.

Referring to fig. 5, in the present embodiment, the opposite side walls of the fixing clip 13 are convexly provided with the stopping protrusions 132, a gap 1321 is formed between the two stopping protrusions 132, one end of the auxiliary tube 14 is fixedly connected with the stopping tube 141, the auxiliary tube 14 passes through the gap 1321, the stopping tube 141 is located on one side of the stopping protrusion 132 away from the end cover 15, and the end of the stopping tube 141 can abut against the stopping protrusions 132. When the user slides the sliding handle 12 in a direction away from the cutting assembly 20, the stopping protrusion 132 can abut against the end of the stopping tube 141 and drive the auxiliary tube 14 to move together, so as to pull the auxiliary tube 14 and the cable 40. In addition, semicircular limiting grooves 1322 are formed in the opposite surfaces of the two stopping protrusions 132, and when the fixing clip 13 is installed on the sliding handle 12, the two limiting grooves 1322 are matched with each other to limit the auxiliary pipe 14 between the two limiting grooves 1322, so that the auxiliary pipe 14 is prevented from being separated from the stopping protrusions 132. It is understood that in other embodiments, not shown, the auxiliary tube 14 may be fixedly connected to the fixing clip 13 by clipping, etc., and is not limited herein.

Referring to fig. 4 and 6, the cutting assembly 20 includes a knife rest 21, a cutter 22 and an auxiliary blade 23, the knife rest 21 is fixedly connected with one end of the spring tube 30, the cable 40 is connected with the cutter 22, the cutter 22 is rotatably connected with the knife rest 21, a groove 211 is formed in the knife rest 21, the auxiliary blade 23 is fixedly mounted at the bottom of the groove 211, the cutter 22 can be in cutting fit with the auxiliary blade 23, and one side of the cutter 22 facing the auxiliary blade 23 is provided with an arc-shaped structure. During operation, the cutting assembly 20 is stretched into a human body cavity, after a plastic catheter to be cut is placed into the groove 211 of the knife rest 21 through the endoscope, the sliding handle 12 is slid, the pull cable 40 is further pulled, one end of the cutter 22 rotates relative to the knife rest 21 after being pulled, the cutter 22 is tangential to the plastic catheter, and the plastic catheter is cut off under the cutting matching of the cutter 22 and the auxiliary blade 23. The recess 211 of knife rest 21 can play limiting displacement to the plastic pipe, prevents that the pipe from sliding at will, provides the guarantee for subsequent accurate shearing. The cutting edge part of cutter 22 sets up to the arc structure, has increased the contact radian of cutter 22 with the outer disc of plastic pipe, is favorable to cuting fast, and simultaneously, arc structure (this arc structure opening down) on the cutter 22 mutually supports with the ascending recess 211 of opening, can inject the plastic pipe in the space that cutter 22 and recess 211 constitute, has reduced the risk of pipe slippage. In addition, when the plastic catheter is cut, the cutter 22 and the auxiliary blade 23 can cut the catheter from the upper direction and the lower direction simultaneously, and under the condition that the same acting force is applied to the cutter 22 through the handle assembly 10, compared with a mode of cutting in one direction, the mode of cutting in two directions together obviously reduces the cutting difficulty and is more beneficial to the operation of a user.

In this embodiment, the tool holder 21 has a cylindrical structure, the tool holder 21 is provided with a mounting groove 212, the mounting groove 212 penetrates through two opposite side walls of the tool holder 21, a fixing shaft 213 is fixedly connected to one end of the mounting groove 212, and the cutting knife 22 is rotatably sleeved on the fixing shaft 213. When the cable 40 pulls the cutter 22 by the handle assembly 10, the cutter 22 rotates about the fixed shaft 213, thereby cooperating with the auxiliary blade 23 to cut the plastic catheter. The auxiliary blade 23 is fixedly installed on one of the groove walls of the mounting groove 212. An opening is arranged at one end of the tool rest 21 close to the spring tube 30, the opening is communicated with the mounting groove 212, and one end of the pull cable 40 passes through the opening of the tool rest 21 and then is hooked on the cutting knife 22. The cable 40 may be a single rotating wire or a wire rope formed by twisting a plurality of rotating fine wires, and is not limited herein.

In addition, a limit shaft 214 is fixedly installed in one end of the installation groove 212 far away from the fixing shaft 213, a propping part 221 is convexly arranged at one end of the cutting knife 22 far away from the pull cable 40, and the propping part 221 can prop against the limit shaft 214. When the cutter 22 moves towards the auxiliary blade 23 to cut off the plastic conduit completely, the bottom surface of the abutting part 221 is convenient for the top of the limiting shaft 214 to abut, and at the moment, the cutter 22 cannot rotate further, so that the moving stroke of the cutter 22 is effectively limited.

In the present embodiment, a buffer member 24 is fixedly connected to one end of the tool rest 21 away from the spring tube 30, a head portion of the buffer member 24 (i.e., an end portion of the buffer portion away from the tool rest 21) is formed as a hemispherical surface, a wire guide hole 241 is obliquely formed in the buffer member 24, and a dotted line portion in fig. 4 shows the wire guide hole 241. The head of bolster 24 can prevent that knife rest 21 from stretching into to human chamber when saying causing the damage to the chamber, and guide wire hole 241 is used for supplying the seal wire to insert, during the use, the utility model discloses a shearing mechanism enters into to human chamber under the direction of seal wire and says in, finally reachs the target site, has made things convenient for user operation. It will be appreciated that the bumper 24 is made of a rubber or silicone material.

Example two

Referring to fig. 7 to 13, a second embodiment of the present invention provides a catheter cutting device for an endoscope capable of passing a guide wire, which is different from the first embodiment in the following main points: the catheter cutting device for an endoscope capable of passing a guide wire in the embodiment further comprises a rotating assembly 50, wherein the rotating assembly 50 is arranged between the tool holder 21 and the spring tube 30, one end of the spring tube 30 can rotate relative to the tool holder 21 through the rotating assembly 50, the other end of the spring tube 30 can rotate relative to the handle assembly 10, and one end of the pull cable 40, which is far away from the cutting knife 22, penetrates through the spring tube 30 and is fixedly connected with the handle assembly 10.

Specifically, the rotating assembly 50 includes a transition sleeve 51, a connection sleeve 52 and a connection cover 53, the connection sleeve 52 is rotatably sleeved outside the transition sleeve 51 and is fixedly connected to one end of the spring tube 30, and the connection cover 53 is rotatably sleeved outside the transition sleeve 51 and is fixedly connected to one end of the tool rest 21. In order to avoid the separation of the transition sleeve 51 from the connection sleeve 52 and the connection cover 53, one end of the transition sleeve 51 is provided with two abutting protrusions 511 protruding outwards in the radial direction, the abutting protrusions 511 are arranged oppositely, the other end of the transition sleeve 51 is provided with an abutting edge 512 protruding outwards in the radial direction, the abutting protrusions 511 abut against the end face of the connection cover 53 far away from the connection sleeve 52, one end of the connection sleeve 52 is provided with an abutting edge 521 protruding inwards, and the abutting edge 512 abuts against the end face of the abutting edge 521 far away from the connection cover 53. Thus, the transition sleeve 51 is prevented from being separated from the connection sleeve 52 and the connection cover 53, and the rotatable connection relationship between the connection sleeve 52 and the connection cover 53 and the transition sleeve 51 is not affected. During the use, when operating personnel rotated handle assembly 10, shearing assembly 20 can rotate in step under the drive of cable 40 to be convenient for control shearing assembly 20 position, realized the regulatory function of shearing assembly 20 angle.

Referring to fig. 12 again, in the present embodiment, an end of the core rod 11 for installing the end cap 15 is provided with a receiving cavity 114, the handle assembly 10 further includes a rotating sleeve 16, the rotating sleeve 16 is rotatably installed in the receiving cavity 114, and one end of the spring tube 30 passes through the end cap 15 and then is fixedly connected to the rotating sleeve 16, and in addition, the aperture of the through hole of the end cap 15 for the spring tube 30 to pass through is smaller than the aperture of the inner hole of the rotating sleeve 16, so that the rotating sleeve 16 is limited to be separated from the receiving cavity 114. The rotatable function of the spring tube 30 relative to the handle assembly 10 is achieved by the rotatable sleeve 16, so that when the handle assembly 10 is rotated, the spring tube 30 will not rotate, and the friction between the spring tube and the body cavity is reduced, thereby alleviating the pain of the patient.

Further, in this embodiment, one end of the cable 40 far away from the cutting assembly 20 is fixedly connected to the fixing clip 13 through a tight fit, for example, a fixing hole is formed on the fixing clip 13, and one end of the cable 40 is in interference fit with the fixing hole, so that the cable 40 can be driven to rotate synchronously with the cutting assembly 20 when the user rotates the handle assembly 10. It will be appreciated that in other embodiments, not shown, one end of the cable 40 is fixedly connected to one end of the auxiliary tube 14, and the other end of the auxiliary tube 14 is fixedly connected to the fixing clip 13, so as to enable the cutting assembly 20 to be driven to rotate synchronously by the cable 40 when the handle assembly 10 is rotated.

In addition, referring to fig. 13, compared with the first embodiment, the present embodiment has the following differences in addition to the above differences:

first, in this embodiment, lengthened bolster 24's length, and the one end in wire guide hole 241 link up bolster 24's lateral wall, and wire guide hole 241's the other end link up bolster 24's tip (show wire guide hole 241's structure with the dotted line in fig. 13), so, work as the utility model discloses a when pipe shearing mechanism gets into human chamber along the seal wire, the seal wire is relatively compact with the structure of the two constitution of bolster 24 head, can not occupy too much human chamber and say the space, has guaranteed that bolster 24 can get into to narrow chamber and say in, is favorable to operating personnel will the utility model discloses a pipe shearing mechanism sends into human chamber smoothly and says.

In the second embodiment, the structure of the limiting shaft 214 and the corresponding abutting portion 221 in the first embodiment is eliminated, and a limiting block 215 is installed in one end of the installation groove 212 far from the fixing shaft 123, so that when the cutting knife 22 cuts off the catheter, one end of the cutting knife 22 can just abut against the limiting block 215, thereby limiting the cutting knife 22.

The parts not mentioned in this embodiment are the same as those in the first embodiment, and are not described again here.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (10)

1. An endoscopic catheter cutting device capable of passing a guide wire, comprising a handle assembly, a cutting assembly, a spring tube and a pull cable, wherein the cutting assembly comprises a cutter holder and a cutter, the spring tube is arranged between the handle assembly and the cutter holder, the pull cable is connected between the cutter and the handle assembly, and the cutter is rotatably connected with the cutter holder, the endoscopic catheter cutting device is characterized in that: the cutting assembly further comprises an auxiliary blade, a groove is formed in the tool rest, the auxiliary blade is fixedly installed at the bottom of the groove, the cutter is in cutting fit with the auxiliary blade, and an arc-shaped structure is arranged on one side, facing the auxiliary blade, of the cutter.

2. The over-the-wire endoscopic catheter shearing device according to claim 1, wherein: the knife rest is of a cylindrical structure, a mounting groove penetrating through two opposite side walls of the knife rest is formed in the knife rest, a fixed shaft is fixedly connected into one end of the mounting groove, and the cutter is rotatably sleeved on the fixed shaft.

3. The guide-wire-passable catheter shearing device for an endoscope according to claim 2, wherein: the auxiliary blade is fixedly arranged on one groove wall of the mounting groove.

4. The guide-wire-passable catheter shearing device for an endoscope according to claim 2, wherein: a limiting block is fixedly arranged in one end, far away from the fixed shaft, of the mounting groove, and the end portion of the cutter can abut against the limiting block.

5. The guide-wire-passable catheter shearing device for an endoscope according to claim 2, wherein: an opening communicated with the mounting groove is formed in one end, close to the spring pipe, of the tool rest, and one end of the stay rope penetrates through the opening and then is hung on the cutter.

6. The guide tube shearing device for a transwireable endoscope according to any of claims 1 to 5, wherein: keep away from on the knife rest the one end fixedly connected with bolster of spring pipe, the head of bolster sets up to the hemisphere, the slope has seted up the guide wire hole on the bolster, the one end in guide wire hole link up the lateral wall of bolster, the other end in guide wire hole link up the tip of bolster.

7. The guide-wire-passable catheter shearing device for an endoscope according to claim 1, wherein: one end of the spring tube is rotatable relative to the handle assembly, one end of the inhaul cable penetrates through the spring tube and then is fixedly connected with the handle assembly, the catheter shearing device for the endoscope capable of guiding the wires further comprises a rotating assembly, the rotating assembly comprises a transition sleeve, a connecting sleeve and a connecting cover, the connecting sleeve is rotatably sleeved outside the transition sleeve and is fixedly connected with one end of the spring tube, and the connecting cover is rotatably sleeved outside the transition sleeve and is fixedly connected with one end of the cutter rest.

8. The guide-wire-passable catheter shearing device for an endoscope according to claim 1, wherein: the handle assembly comprises a core bar, a sliding handle, a fixing clamp, an auxiliary tube and an end cover, the sliding handle is slidably sleeved outside the core bar, the end cover is installed at one end of the core bar, the fixing clamp is installed on the sliding handle, one end of the auxiliary tube is fixedly connected with the fixing clamp, the other end of the auxiliary tube is fixedly connected with the inhaul cable, and one end of the spring tube is fixedly connected with the end cover.

9. The guide-wire-passable catheter shearing device for an endoscope according to claim 8, wherein: the side wall of the core bar is provided with a sliding groove which penetrates through the two opposite side walls of the core bar along the axial direction, the fixing clamp is of a structure shaped like a Chinese character ji, two free ends of the fixing clamp extend outwards to form an embedded clamping part, the side wall of the sliding handle is provided with a clamping groove, the fixing clamp is fixedly contained in the sliding handle, and the embedded clamping part penetrates through the sliding groove and then is clamped into the clamping groove.

10. The guide-wire-passable catheter shearing device for an endoscope according to claim 9, wherein: the fixing clamp is characterized in that stop protrusions are arranged on the opposite side walls of the fixing clamp in a protruding mode, a gap is formed between the two stop protrusions, one end of the auxiliary pipe is fixedly connected with the stop pipe, the auxiliary pipe penetrates through the gap, the stop pipe is located at the position, far away from the stop protrusions, of one end of the end cover, and the end portions of the stop pipe are abutted to the stop protrusions.

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