CN111658023A

CN111658023A - Peripheral telescopic forceps flap type multifunctional cavity biopsy forceps device

Info

Publication number: CN111658023A
Application number: CN202010653725.6A
Authority: CN
Inventors: 李臻; 李鑫; 王彩鸿; 刘杨; 周纪妹; 詹鹏超; 石洋; 张玉元; 任克伟; 任建庄; 韩新巍
Original assignee: First Affiliated Hospital of Zhengzhou University
Current assignee: First Affiliated Hospital of Zhengzhou University
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2020-09-15
Also published as: CN112971869A; CN112971869B

Abstract

The invention relates to the field of medical instruments, in particular to a peripheral telescopic clamp flap type multifunctional cavity biopsy forceps device; the invention comprises a handle, an outer sleeve, a hinge joint and biopsy forceps which are connected in sequence, wherein a pushing mechanism is arranged in the biopsy forceps, penetrates through the outer sleeve and is connected with a sliding handle, and the sliding handle can drive the pushing mechanism to move so as to expand the biopsy forceps; a shearing mechanism is also arranged in the biopsy forceps, a pressing elastic mechanism is arranged on the handle, and the pressing elastic mechanism can drive the shearing mechanism to cut the biopsy tissue on the side wall of the blood vessel; in the invention, the pushing mechanism is driven to move by sliding the sliding handle, so that the biopsy forceps are unfolded, the pressing elastic mechanism is pressed, and the shearing mechanism is driven to cut the biopsy tissue on the side wall of the blood vessel, therefore, the operation is convenient, the practicability is strong, and the safety factor is high.

Description

Peripheral telescopic forceps flap type multifunctional cavity biopsy forceps device

Technical Field

The invention relates to the field of medical instruments, in particular to a peripheral telescopic clamp flap type multifunctional cavity biopsy forceps device.

Background

Biopsy forceps are one of the most important and commonly used tools in modern interventional diagnosis and treatment, and are used for taking biopsy samples in various lumens such as blood vessels, bile ducts, common hepatic ducts and the like to provide pathological bases for diagnosis, and pathological biopsy is always considered as the 'gold standard' for tumor diagnosis.

In the biopsy sampling operation of the inner wall of the blood vessel, the biopsy sampling is also required to be carried out by the biopsy forceps, however, in the actual operation process, the existing biopsy forceps have the following defects:

1. when the biopsy is taken conventionally, the biopsy tissue which is not easy to fall off is taken simply through biopsy forceps, so that the tissue is very easy to tear in a large area, a series of subsequent reactions such as inflammation and infection are caused, and the biopsy tissue which is easy to fall off is searched randomly in the blood vessel through biopsy, so that the biopsy tissue can not be found smoothly, a large amount of time is consumed, the labor waste is caused for doctors, the operation time of patients is prolonged, and the operation is also a kind of decoction for the patients.

2. At present, high-frequency thermal biopsy forceps are arranged on the market, biopsy tissues are cut off and clamped in a high-frequency electric excision mode, the method has the tissue cutting effect to a certain extent, certain scorching effect can be formed on the tissues by adopting the high-frequency electric excision, activity of the biopsy tissues can be killed, scorched biopsy tissue residues can be remained at the jaw of the biopsy forceps, and the biopsy forceps are very difficult to take out and inconvenient to clean.

3. The inside pipeline that sets up through biopsy forceps pipe of current biopsy forceps is to the inside infusion liquid medicine of biopsy forceps and tissue region, can't play the effect of duplicating the treatment to the inside tissue of lumen.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a circumferential telescopic forceps flap type multifunctional lumen biopsy forceps device, which drives a pushing mechanism to move by sliding a sliding handle, so that a biopsy forceps is unfolded, presses a pressing elastic mechanism, and drives a shearing mechanism to cut a biopsy tissue on a side wall of a blood vessel, and the operation is convenient.

The purpose of the invention is realized by the following technical scheme:

the invention provides a peripheral telescopic forceps flap type multifunctional cavity biopsy forceps device which comprises a handle, an outer sleeve, a hinged joint and biopsy forceps which are sequentially connected, wherein a pushing mechanism used for opening the biopsy forceps is arranged in the biopsy forceps, the pushing mechanism penetrates through the outer sleeve and is connected with a sliding handle arranged on the handle, and the sliding handle can drive the pushing mechanism to move so as to expand the biopsy forceps; the biopsy forceps are internally provided with a shearing mechanism for cutting the biopsy tissue on the side wall of the blood vessel, the handle is provided with a pressing elastic mechanism, the pressing elastic mechanism is connected with the shearing mechanism, and the pressing elastic mechanism can drive the shearing mechanism to cut the biopsy tissue on the side wall of the blood vessel.

As an improvement of the invention, the biopsy forceps are hinged on the hinge joint, the biopsy forceps comprise a first forceps flap and a second forceps flap, relief openings are respectively arranged in the first forceps flap and the second forceps flap, and saw teeth which are uniformly distributed are respectively arranged on the edges of the first forceps flap and the second forceps flap.

As a further improvement of the invention, the root parts of the first clamp flap and the second clamp flap are respectively provided with a ring groove, and an elastic tightening belt is arranged in the ring grooves.

As a further improvement of the invention, the pushing mechanism comprises an inclined splitting block, an inclined wedge top and a pushing brace, wherein the inclined splitting block is in an open shape, and the inclined wedge top penetrates through the inclined splitting block through the pushing brace to be connected with the sliding handle.

As a further improvement of the invention, the shearing mechanism comprises a fixed frame piece, a gear fixed piece and a gear driving frame, wherein the fixed frame piece comprises a left frame piece and a right frame piece, the left frame piece and the right frame piece are respectively connected with a left rotating cutter and a right rotating cutter, the left rotating cutter and the right rotating cutter are respectively provided with a wide edge section and a narrow edge section, the wide edge section is provided with a sawtooth cutting edge for shearing, the narrow edge section is provided with an arc-shaped rack, the gear fixed piece is hinged with a gear, and the gear is respectively meshed and connected with the gear driving frame and the arc-shaped rack.

As a further improvement of the invention, the left frame piece and the right frame piece are both provided with guide stop blocks, the left rotating knife and the right rotating knife are both provided with guide grooves, and the guide stop blocks are clamped in the guide grooves.

As a further improvement of the invention, a gear sliding opening meshed with the gear is arranged in the gear driving frame, a rack is arranged on one side of the gear sliding opening, a guide strip is arranged on the other side of the gear sliding opening, and a circumferential guide groove for the guide strip to be clamped is arranged on the gear.

As a further improvement of the invention, the gear driving frame is connected with a movable push-pull strip, and the movable push-pull strip penetrates through the outer sleeve and the pressing elastic mechanism.

As a further improvement of the invention, the pressing elastic mechanism comprises a fixed shell, a sliding block, a pressing sheet and a top flap, a sliding groove is arranged on the outer sleeve, the fixed shell is connected in the sliding groove, a top plate is arranged in the fixed shell, a spring is arranged between the sliding block and the top plate, the pressing sheet is hinged with the top flap, and the top flap is connected with the sliding block.

As a further improvement of the invention, the medical liquid infusion apparatus further comprises a liquid infusion mechanism for delivering liquid medicine, wherein the liquid infusion mechanism comprises an inner sleeve and a guide wire, round hole channels are arranged on the outer sleeve and the hinge joint, the inner sleeve is arranged in the round hole channel, and the guide wire is guided into the inner sleeve.

In the invention, the pushing mechanism is driven to move by sliding the sliding handle, so that the biopsy forceps are unfolded, the pressing elastic mechanism is pressed, and the shearing mechanism is driven to cut the biopsy tissue on the side wall of the blood vessel, therefore, the operation is convenient, the practicability is strong, and the safety factor is high.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a first schematic structural view of a bioptome of the present invention;

FIG. 3 is a second schematic structural view of a bioptome of the present invention;

FIG. 4 is a third schematic structural view of a bioptome of the present invention;

FIG. 5 is a first exploded view of a bioptome of the present invention;

FIG. 6 is a second exploded view of a bioptome of the present invention;

FIG. 7 is a first schematic structural diagram of a shearing mechanism of the present invention;

FIG. 8 is a second schematic structural view of the shearing mechanism of the present invention;

FIG. 9 is a third schematic structural view of the shearing mechanism of the present invention;

FIG. 10 is a first view of the connection between the gear and the gear driving frame according to the present invention;

FIG. 11 is a second schematic view of the connection between the gear and the gear driving frame of the present invention;

FIG. 12 is a first schematic view of the connection of the gears in the shearing mechanism of the present invention;

FIG. 13 is a second schematic view of the connection of the gears in the shearing mechanism of the present invention;

FIG. 14 is a third schematic view of the connection of the gears in the shearing mechanism of the present invention;

FIG. 15 is a fourth schematic structural view of the shearing mechanism of the present invention;

FIG. 16 is a first schematic structural view of a pushing mechanism of the present invention;

FIG. 17 is a second schematic structural view of the pushing mechanism of the present invention;

FIG. 18 is a schematic view of the retainer plate of the present invention;

FIG. 19 is a schematic view of the construction of the right frame piece of the present invention;

FIG. 20 is a first schematic structural view of a pressing elastic mechanism according to the present invention;

FIG. 21 is a second schematic structural view of the pressing elastic mechanism of the present invention;

FIG. 22 is a cross-sectional view of the pressing spring mechanism of the present invention;

wherein the reference numerals are: 1-handle, 11-sliding handle, 2-outer sleeve, 3-articulated head, 4-biopsy forceps, 41-first forceps flap, 42-second forceps flap, 43-abdicating opening, 44-saw tooth, 45-ring groove, 46-elastic tightening belt, 5-pushing mechanism, 51-oblique cleft block, 52-oblique wedge top head, 53-pushing brace, 6-shearing mechanism, 61-fixed frame piece, 611-left frame piece, 612-right frame piece, 613-wide edge section, 614-narrow edge section, 615-guide block, 616-saw tooth cutting edge, 617-arc rack, 62-gear fixing piece, 621-gear, 622-ring guide groove, 63-gear driving frame, 631-left rotating knife, 632-right rotating knife, 633-gear sliding opening, 634-moving push-pull strip, 635-guide groove, 636-rack, 637-guide strip, 7-pressing elastic mechanism, 71-fixed shell, 72-sliding block, 73-pressing piece, 74-top flap, 75-sliding groove, 76-top plate, 77-spring, 8-liquid-passing mechanism, 81-inner sleeve and 82-guide wire.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 22, the multi-functional peripheral telescopic forceps flap type biopsy forceps device of the present invention includes a handle 1, an outer cannula 2, a hinged joint 3 and biopsy forceps 4 connected in sequence.

As shown in fig. 1, a pushing mechanism 5 for opening the biopsy forceps 4 is disposed in the biopsy forceps 4, the pushing mechanism 5 passes through the outer cannula 2 and is connected to a sliding handle 11 disposed on the handle 1, and the sliding handle 11 can drive the pushing mechanism 5 to move so as to unfold the biopsy forceps 4.

The biopsy forceps 4 are further internally provided with a shearing mechanism 6 for cutting the biopsy tissue on the side wall of the blood vessel, the handle 1 is provided with a pressing elastic mechanism 5, the pressing elastic mechanism 5 is connected with the shearing mechanism 6, and the pressing elastic mechanism 5 can drive the shearing mechanism 6 to cut the biopsy tissue on the side wall of the blood vessel.

As shown in fig. 2 to 6, in the present invention, the biopsy forceps 4 is hinged on the hinge joint 3, the biopsy forceps 4 includes a first jaw 41 and a second jaw 42, the first jaw 41 and the second jaw 42 are both provided with a relief opening 43 therein, the edges of the first jaw 41 and the second jaw 42 are both provided with saw teeth 44 uniformly distributed, the roots of the first jaw 41 and the second jaw 42 are both provided with a ring groove 45, and an elastic tightening strip 46 is arranged in the ring groove 45; in particular, the outer sleeve 2 is a slender round tube, a sliding handle 11 which can guide and slide is arranged on the handle 1, the front end of the outer sleeve 2 is coaxially and fixedly provided with a hinged joint 3, a biopsy forceps 4 is hinged on the hinged joint 3, the biopsy forceps 4 is formed by mutually hinging a first forceps flap 41 and a second forceps flap 42, the edges of the first and

second clamp flaps

41 and 42 are designed with saw teeth 44 uniformly arranged back and forth, a notch with certain depth and width is arranged in the middle area of the upper side edge of the first clamp flap 41 and the second clamp flap 42 as a yielding port 43, the first clamp flap 41 and the second clamp flap 42 are respectively opposite to the yielding port, when the first clamp flap 41 and the second clamp flap 42 are closed, the two opposite abdicating openings can enable the inner side and the outer side of the clamp flap to have a passage opening with a certain area, and when the biopsy forceps 4 are closed, the passage opening can clamp the convex tissue on the inner side wall of the blood vessel into the first clamp flap 41 and the second clamp flap 42. Two rings of ring grooves 45 are arranged on the circumferential outer wall of the root area of the first forceps flap 41 and the second forceps flap 42 along the front-back direction, the two rings of ring grooves 45 have certain intervals in the front-back direction, an elastic tightening belt 46 is sleeved inside each ring groove 45, the ring grooves 45 play a role in clamping and preventing slippage on the elastic tightening belt 46, the elastic tightening belts 46 have elastic expansion and contraction characteristics, and are in an elastic stretching state when being sleeved on the peripheries of the ring grooves 45, so that the first forceps flap 41 and the second forceps flap 42 of the biopsy forceps 4 are in a closed state all the time under the elastic tightening effect of the front elastic tightening belt 46 and the rear elastic tightening belt 46 when no external force is applied.

As shown in fig. 7 to 9, in the present invention, the shearing mechanism 6 includes a fixed frame piece 61, a gear fixing piece 62 and a gear driving frame 63, the fixed frame piece 61 includes a left frame piece 611 and a right frame piece 612, the left frame piece 611 and the right frame piece 612 are respectively connected with a left rotating knife 631 and a right rotating knife 632, the left rotating knife 631 and the right rotating knife 632 are respectively provided with a wide edge section 613 and a narrow edge section 614, the wide edge section 613 is provided with a sawtooth cutting edge 616 for shearing, the narrow edge section 614 is provided with an arc-shaped rack 617, the gear fixing piece 62 is hinged with a gear 621, and the gear 621 is respectively engaged with the gear driving frame 63 and the arc-shaped rack 617.

Specifically, the fixed frame piece 61 is fixedly connected to the front end of the hinge joint 3, the fixed frame piece 61 is divided into a left frame piece 611 and a right frame piece 612 which are symmetrically distributed in the left-right direction, the left frame piece 611 and the right frame piece 612 are arc pieces with a certain radian, a gap with a certain width is formed between the lower edges of the left frame piece 611 and the right frame piece 612, the left frame piece 611 and the right frame piece 612 are fixedly connected to the left and right frame pieces in the area close to the root portion, and the left and right frame pieces 611 and the right frame pieces 612 are fixedly connected to the hinge joint 3 through the. A gear fixing piece 62 is fixed at the middle position of the gap between the lower edges of the left frame piece 611 and the right frame piece 612, and the gear fixing piece 62 is fixed between the gap between the left frame piece 611 and the right frame piece 612 like a cross beam.

In the invention, the left frame piece 611 and the right frame piece 612 are both provided with a guide stop block 615, the left rotating knife 631 and the right rotating knife 632 are both provided with a guide groove 635, and the guide stop block 615 is clamped in the guide groove 635; specifically, two guide stoppers 615 protruding outward are respectively disposed on the outer side surfaces of the left frame piece 611 and the right frame piece 612 of the fixed frame piece 61, the cross section of each guide stopper 615 is T-shaped, the two guide stoppers 615 of the left frame piece 611 are close to the front end in the axial direction, the two guide stoppers 616 of the right frame piece 612 are close to the rear end in the axial direction, and the two guide stoppers of the same frame piece are all located at the same axial depth. The left frame piece 611 and the right frame piece 612 are respectively connected with a left rotating knife 631 and a right rotating knife 632 through guide stop blocks in a clamping manner, the left rotating knife 631 and the right rotating knife 632 are integrally of arc-shaped piece structures, the overall outline of the left rotating knife 631 and the right rotating knife 632 is similar to a right-angle side structure in a shape like a Chinese character '7', namely, a wide section 613 is a region with a wide width in the axial direction, a narrow section 614 is a region with a narrow width in the axial direction, which is integrally connected with the lower edge of the left rotating knife 631 and the right rotating knife 632, guide grooves 635 with a certain radian are formed in the circumferential direction, and the left rotating knife 631 and the right rotating knife 632 are mutually clamped with the corresponding guide stop blocks through the guide grooves 635, so that the left rotating knife 631 and the right rotating knife 632 can only adhere to the arc outer wall of the frame piece 615 to rotate and cannot move relatively in the axial direction. The upper edges of the wide edge sections 613 of the left rotating knife 631 and the right rotating knife 632 are designed to be saw-toothed cutting edges 616, and the saw-toothed cutting edges 616 have cutting edges and also have saw teeth. The right-angle side end edges of the narrow side sections 614 of the left rotating knife 631 and the right rotating knife 632 are designed into arc-shaped racks 617 which are uniformly distributed.

The left rotating knife 631 and the right rotating knife 632 are both in the above structure, the saw-tooth cutting edges 616 of the left rotating knife 631 and the right rotating knife 632 are both located above the abdicating opening 43, and the left rotating knife 631 and the right rotating knife 632 are opposite in direction of the arc-shaped racks 617, and a certain interval is formed between the two arc-shaped racks 617. A gear 621 is provided under the gear fixing plate 62 to be hinged to the gear fixing plate 62, and the gear 621 is engaged with the arc-shaped rack 617 simultaneously in the front-rear direction. When the gear 621 rotates, the left rotary knife 631 and the right rotary knife 632 can be driven to synchronously rotate in opposite directions or in opposite directions under the arc-shaped limit of the guide stopper 615 of the fixed frame piece 62. The serrated cutting edges 616 on the upper edges of the left rotating knife 631 and the right rotating knife 632 are located at the cutting edge surfaces of the cutting edges which are respectively the upper side shearing surfaces when the cutting edges rotate in opposite directions and approach each other, so that the left rotating knife 631 and the right rotating knife 632 have a cutting effect.

As shown in fig. 10 and 11, in the present invention, a gear sliding opening 633 engaged with the gear 621 is disposed in the gear driving frame 63, a rack 636 is disposed on one side of the gear sliding opening 633, a guide 637 is disposed on the other side of the gear sliding opening 633, and a circumferential guide groove 622 for the guide 637 to be inserted into is disposed on the gear 621; the gear driving frame 63 is connected with a moving push-pull strip 634, and the moving push-pull strip 634 passes through the outer sleeve 2 and the pressing elastic mechanism 7; specifically, the thickness of the gear 621 is greater than the thickness of the left rotating knife 631 and the right rotating knife 632, and when the gear 621 is engaged with the arc-shaped rack 617, the bottom surface of the gear 621 is flush with the bottom of the engagement portion of the left rotating knife 631 and the right rotating knife 632, so that the upper end of the gear 621 extends out to a certain height relative to the upper end of the arc-shaped rack 617. The gear driving frame 63 is sleeved outside the gear section in the area above the arc-shaped gear 617, and the gear driving frame 63 is positioned at the gear section in the area between the gear fixing plate 62 and the arc-shaped gear 617.

The gear driving frame 63 has a rectangular outline, an oblong gear sliding hole 633 is provided in a middle area inside the gear driving frame 63, and the gear 621 is fitted inside the gear sliding hole 633 and can move back and forth inside. The two straight side walls in the oblong gear sliding port 633 are integrally provided with evenly distributed racks 636 on one straight side wall, the racks 636 can be meshed with the gear 621, a raised guide bar 637 is arranged on the other straight side wall along the direction of the straight side wall, and a circumferential guide groove 622 matched with the guide bar 637 is arranged on the gear 621 circumferentially, so that the gear driving frame 63 can slide in the front-back direction under the guiding action of the guide bar 637 and the circumferential guide groove 622, and the racks on the straight side walls can drive the gear to rotate in the sliding process of the gear driving frame 63. A moving push-pull bar 634 is fixedly connected to the rear end of the gear driving frame 63, the moving push-pull bar 634 passes through the hinge 3 towards the rear, and a channel in the pipe wall of the outer sleeve 2 extends backwards to the handle 1 at the rear side, the moving push-pull bar 634 has certain strength, and when pushed forwards and backwards, the moving push-pull bar 634 can drive the gear driving frame 63 at the front end to move forwards and backwards.

As shown in fig. 16 and 17, in the present invention, the pushing mechanism 5 includes an inclined splitting block 51, an inclined wedge top 52 and a pushing brace 53, the inclined splitting block 51 is open, and the inclined wedge top 52 passes through the inclined splitting block 51 through the pushing brace 53 to be connected with the sliding handle 11; specifically, an inwardly protruding wedge 51 is integrally fixed to the inside area of the root of the biopsy forceps 4, and the protruding length of the wedge 51 inwardly decreases from the root toward the front, so that the two wedges 51 are integrally formed into an open structure. A wedge top 52 is arranged in the middle area of the front end of the hinge joint 3, the outer diameter of the wedge top 52 is sequentially increased from the root of the rear end to the outer diameter of the front end, the overall profile is similar to a conical structure, two pushing braces 53 are fixedly connected to the positions, close to the upper side and the lower side, of the rear end of the wedge top 52, the pushing braces 53 extend backwards in a channel in the pipe wall of the outer sleeve 2 to the handle 1 at the rear end, and the wedge top 52 can be driven to move back and forth by pushing and pulling the pushing braces 53; when the wedge tip 52 is located in front of the middle region of the two wedge blocks 51, the wedge tip 52 is not in contact with the wedge blocks 51, and the two jaws of the biopsy forceps 4 are in a closed state.

When the pushing brace 53 drives the wedge top 52 to pull backwards, the conical wedge top 52 which is thin at the back and thick at the front moves backwards at the open channel between the two wedge blocks 51, and the wedge top 52 gradually plays a role of propping up the outside at the wedge blocks 51 at the two sides in the moving process, so that the two clamp petals of the biopsy forceps 4 are gradually opened; when the pushing brace 53 drives the wedge top 52 to gradually separate from the wedge block, the first clamp piece 41 and the second clamp piece 42 are gradually closed in the forward moving process of the wedge top 52 under the elastic tightening action of the elastic tightening belt 46, the two parallel pushing braces 53 are connected with the sliding handle 11 at the handle section at the rear end of the outer sleeve 2, and the sliding handle 11 can drive the wedge top 52 to move back and forth by sliding the sliding handle back and forth along the axial direction.

As shown in fig. 20 to 22, in the present invention, the pressing elastic mechanism 7 includes a fixed shell 71, a sliding block 72, a pressing piece 73 and a top flap 74, a sliding slot 75 is provided on the outer sleeve 2, the fixed shell 71 is connected in the sliding slot 75, a top plate 76 is provided in the fixed shell 71, a spring 75 is provided between the sliding block 72 and the top plate 76, the pressing piece 73 is hinged with the top flap 74, and the top flap 74 is connected with the sliding block 72; specifically, the movable push-pull bar 634 extends backwards to the rear handle 11 on the pipe wall of the outer sleeve 2 and is connected with a pressing elastic push-pull mechanism 7, a sliding groove 75 with a certain depth is arranged at the pipe wall of the outer sleeve 2 of the pressing elastic push-pull mechanism 7, the sliding groove 75 has a certain length along the axial front-rear direction, a fixed shell 71 is fixed inside the sliding groove 75, a sliding block 72 is sleeved inside the fixed shell 71, the fixed shell 71 plays a role in clamping and guiding the sliding block 72, the rear end of the movable push-pull bar 634 is fixedly connected with the sliding block 72, a vertical top plate 76 is integrally fixed inside the fixed shell 71, a spring 77 is connected between the top plate 76 and the sliding block 72 of the fixed shell 71, a pressing plate 73 and a top flap 74 are synchronously hinged outside the fixed shell 71, the top flap 74 is positioned in the middle area of the pressing plate 73 and hinged on the same hinge shaft, and a certain included angle, the lower side of the top petal 74 is pressed by the pressing piece 73, and the top corner of the sliding block 72 arranged on the upper side surface of the top petal 74 is used for bearing the pressing action of the top petal 74.

When the pressing piece 73 is pressed upwards, the pressing piece 73 enables the angle of the top petal 74 to deflect by pressing the top petal 74 upwards, so that the sliding block 72 slides backwards in the sliding groove 75 by pressing the top corner of the sliding block 72, the gear driving frame 63 is driven to move backwards by moving the push-pull strip 634, the gear 621 is driven to rotate, the left rotating knife 631 and the right rotating knife 632 rotate in opposite directions, and finally the effect of cutting the two sawtooth cutting edges 616 by cutting is achieved. In this state, the spring 77 is compressed and shortened in length, and is compressed as a whole. When the pressing piece 73 stops being pressed, the spring 77 resets to push the sliding block 72 to move forward, so that the pushing bar 634 is moved to drive the gear driving frame 63 to move forward synchronously, the gear 621 drives the left rotating knife 631 and the right rotating knife 632 to rotate in opposite directions synchronously, the two sawtooth cutting edges 616 are far away from each other, and finally, the distance between the two sawtooth cutting edges 616 is larger than the width of a biopsy channel opening formed by the relief openings 43 on the two forceps flaps.

In the invention, in order to introduce liquid medicine for auxiliary treatment, the liquid medicine introducing device comprises a liquid introducing mechanism 8 for conveying the liquid medicine, wherein the liquid introducing mechanism 8 comprises an inner sleeve 81 and a guide wire 82, circular hole channels are arranged on the outer sleeve 2 and the hinge joint 3, the inner sleeve 81 is arranged in the circular hole channel, and the guide wire 82 is guided into the inner sleeve 81; specifically, the inner cannula 81 is sleeved in the outer cannula 2 in a penetrating manner, circular hole channels for the inner cannula 81 to penetrate are arranged in the middle areas of the hinged joint 3 and the wedge top 52, the front end of the inner cannula 81 can penetrate through the hinged joint 3 and the wedge top 52 to enter the forceps valve, liquid medicine can be introduced to perform auxiliary treatment when the biopsy forceps 4 perform cutting and clamping biopsy, and a port is arranged at the rear end of the handle 11 to allow the inner cannula 81 to be inserted into the outer cannula 2.

When the invention is needed to cut and clamp the side wall of the blood vessel in the body of a patient to clamp the biopsy tissue, two clamp flaps of the biopsy forceps 4 are in a closed state in an initial state, the saw tooth cutting edges 616 of the left rotating knife 631 and the right rotating knife 632 are also in an open state, when the invention is conveyed to the position where the blood vessel in the body needs to cut and clamp the biopsy tissue, the sliding handle 11 is pulled backwards, the sliding handle 11 drives the wedge top head 52 to be pulled backwards through the pushing brace 53, and the wedge top head 52 supports the wedge blocks 51 at two sides to open the two clamp flaps; for the biopsy tissues which can not be taken off normally, the upper side of the biopsy forceps 4 is close to the biopsy tissues, the sliding handle 11 is loosened, the first forceps flap 41 and the second forceps flap 42 are closed under the elastic tightening action of the elastic tightening belt 46, and the biopsy forceps 4 is tightly clamped at the passage opening at the upper end of the forceps flaps; pressing the pressing sheet 73, the pressing sheet 73 drives the sliding block 72 to slide backwards through the top flap 74, thereby driving the gear driving frame 63 to move backwards through moving the pushing and pulling strip 634, driving the gear 621 to rotate so that the left rotating knife 631 and the right rotating knife 632 rotate oppositely, cutting the biopsy tissue clamped at the upper side passage openings of the first forceps flap 41 and the second forceps flap 42, storing the cut biopsy tissue inside the biopsy forceps 4, thereby completing the effect of cutting biopsy, and clamping and falling off through the saw teeth of the first forceps flap 41 and the second forceps flap 42 for easily clamping and falling off the biopsy tissue.

The invention has the innovative technical points and the beneficial effects that:

1. the sawtooth 44 of the first clamp flap 41 and the second clamp flap 42 can clamp and collect the easily-fallen biopsy tissue on the inner wall of the blood vessel, the rotating knife structure arranged inside the first clamp flap 41 and the second clamp flap 42 can clamp the difficultly-fallen biopsy tissue into the inside of the channel opening and easily cut the biopsy tissue to separate the biopsy tissue, the operation is convenient, the effect is obvious, and the efficiency is greatly improved.

2. The double rotating knives are all in synchronous opposite or reverse arc circumference rotation type, the whole shape adopts a circular arc sheet '7' type right angle section, the wider sawtooth cutting edge 616 on the upper edge of the wide edge section 613 is ensured, more cutting length can be achieved, the arc racks 617 of the left rotating knife 631 and the right rotating knife 632 can be simultaneously meshed with the gear 621 in the front and back direction, the guide stop blocks 615 distributed along the arc direction are matched for arc guide of the left rotating knife 631 and the right rotating knife 632, so that the gear 621 can always synchronously drive the double rotating knives to rotate in opposite or reverse arc circumference direction, the cutting stability of the double rotating knives is ensured, meanwhile, the sawtooth cutting edge 616 has both sawtooth and cutting edge design, the double rotating knives can also generate large shearing force generated by larger oblique direction when rotating in opposite circumference direction, the biopsy tissue can be cut smoothly, and the situation that the cutting cannot be carried out can not occur, meanwhile, the double-rotating knife adopts an arc sheet type structure, and the fixed clamping piece also adopts an arc sheet type structure, so that the structure can be attached to the inner wall of the forceps valve as closely as possible, and the space of the middle area is reserved so as to clamp biopsy tissues with larger volume.

3. The gear 621 is driven to rotate through the sliding action of the gear driving frame 63, a guide bar 637 arranged on one side inside the gear driving frame 63 is matched with a circumferential guide groove 622 of the gear 621, so that the gear driving frame 63 can be guided to slide, a rack 636 arranged on the other side inside the gear driving frame 63 can drive the gear 621 in the sliding process, the structures are buckled and interdependent with each other, the rotating stability of the gear 621 is ensured, and the guiding condition of the back-and-forth movement of the gear driving frame 63 is solved; on the basis of ensuring the functionality, the occupied space of the structure is reduced to the greatest extent, and the availability of the internal space of the forceps valve is ensured, so that more tissues can be clamped to the greatest extent.

4. The rear end of the pushing brace 53 is connected by pressing the elastic push-pull mechanism 7, the pressing piece 73 is simultaneously hinged with the top flap 74 and the fixed shell 71, the spring 77 is arranged in the pushing brace, the double-rotating-cutter reset opening effect can be achieved after cutting, the pressing piece 73 is hinged with the top flap 74, the top flap 74 props the sliding block 72, the simple operation of pressing the pressing piece 73 can be achieved, the double-rotating-cutter cutting process can be completed, and operation is greatly simplified.

5. The oblique wedge 51 that biopsy forceps 4 inner wall set up can reach open effect through slide wedge top 52 shore, the cooperation, the effect that closed restoration can be played the pincers lamella to the elasticity lacing tape 46 of cooperation two simultaneously, not only can reach the effect that opens and shuts that has the reset function, can let in interior sleeve pipe 81 through slide wedge top 52 simultaneously, reach and pour into the liquid medicine mesh into, both play the treatment to the biopsy tissue of being cut, can guarantee the activity of cutting part biopsy tissue again, reduce the culture cycle before the diagnosis of biopsy tissue to a certain extent, the progress of diagnosing has been accelerated.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A peripheral telescopic forceps flap type multifunctional cavity biopsy forceps device is characterized by comprising a handle, an outer sleeve, a hinged joint and biopsy forceps which are sequentially connected, wherein a pushing mechanism used for opening the biopsy forceps is arranged in the biopsy forceps, the pushing mechanism penetrates through the outer sleeve and is connected with a sliding handle arranged on the handle, and the sliding handle can drive the pushing mechanism to move so as to enable the biopsy forceps to be unfolded; the biopsy forceps are characterized in that a shearing mechanism used for cutting the biopsy tissue on the side wall of the blood vessel is further arranged in the biopsy forceps, a pressing elastic mechanism is arranged on the handle and connected with the shearing mechanism, and the pressing elastic mechanism can drive the shearing mechanism to cut the biopsy tissue on the side wall of the blood vessel.

2. The device as claimed in claim 1, wherein the biopsy forceps are hinged to the hinged head, the biopsy forceps comprise a first forceps flap and a second forceps flap, the first forceps flap and the second forceps flap are both provided with a relief opening, and the edges of the first forceps flap and the second forceps flap are both provided with saw teeth uniformly distributed.

3. The biopsy forceps device of claim 2, wherein the first and second forceps flaps are each provided with a ring groove at the root thereof, and the ring groove is provided with an elastic tightening belt.

4. The device as claimed in claim 3, wherein the pushing mechanism comprises an inclined splitting block, an inclined wedge top and a pushing brace, the inclined splitting block is open, and the inclined wedge top passes through the inclined splitting block via the pushing brace and is connected with the sliding handle.

5. The device as claimed in claim 4, wherein the shearing mechanism comprises a fixed frame piece, a gear fixing piece and a gear driving frame, the fixed frame piece comprises a left frame piece and a right frame piece, the left frame piece and the right frame piece are respectively connected with the left rotating knife and the right rotating knife, the left rotating knife and the right rotating knife are respectively provided with a wide section and a narrow section, the wide section is provided with a sawtooth cutting edge for shearing, the narrow section is provided with an arc-shaped rack, the gear fixing piece is hinged with a gear, and the gear is respectively meshed with the gear driving frame and the arc-shaped rack.

6. The device as claimed in claim 5, wherein the left frame piece and the right frame piece are provided with guide stoppers, the left rotating knife and the right rotating knife are provided with guide slots, and the guide stoppers are clamped in the guide slots.

7. The device as claimed in claim 6, wherein a gear sliding opening meshed with the gear is provided in the gear driving frame, a rack is provided on one side of the gear sliding opening, a guide bar is provided on the other side of the gear sliding opening, and a circumferential guide groove for the guide bar to be inserted is provided on the gear.

8. The device as claimed in claim 7, wherein the gear driving frame is connected to a moving push-pull bar, and the moving push-pull bar passes through the outer sleeve and the pressing elastic mechanism.

9. The biopsy forceps device of claim 8, wherein the pressing elastic mechanism comprises a fixed shell, a sliding block, a pressing piece and a top flap, the outer sleeve is provided with a sliding slot, the fixed shell is connected in the sliding slot, the fixed shell is provided with a top plate, a spring is arranged between the sliding block and the top plate, the pressing piece is hinged to the top flap, and the top flap is connected to the sliding block.

10. The device of claim 1, further comprising a liquid passing mechanism for delivering a liquid medicine, wherein the liquid passing mechanism comprises an inner sleeve and a guide wire, circular hole channels are arranged on the outer sleeve and the hinged joint, an inner sleeve is arranged in the circular hole channel, and the guide wire is guided into the inner sleeve.