A minimally invasive lesion resection and capture device

Abstract

The present invention relates to the technical field of medical devices, and particularly relates to a minimally invasive lesion resection and capture device, which device comprises a main body structure, a grasping assembly and a cutting assembly. The main body structure comprises a framework rod and a housing assembly which are connected to each other. The grasping assembly comprises elastic jaws and a rotating pipe fitting. The framework rod, the rotating pipe fitting and the housing assembly are coaxially arranged in sequence from inside to outside, and there is a channel between the framework rod and the housing assembly. The elastic jaws are arranged at one end of the rotating pipe fitting. The elastic jaws are connected to the rotating pipe fitting, and the end of the rotating pipe fitting away from the elastic jaws is in cooperative movement with the housing assembly or the framework rod through a screw pair. The elastic jaws comprise a plurality of clamping pieces arranged circumferentially along the rotating pipe fitting. The present invention can improve the problem of poor cutting force existing in the existing scalpel structure, so as to further improve the efficiency of removing lesion tissues.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular, to a minimally invasive lesion resection and capture device. Background Art

[0002] Minimally invasive surgery has the characteristics of small incisions, less pain for patients, safe and convenient surgical operations, quick recovery, and good treatment effects. Currently, in minimally invasive surgery, the most commonly used end tools are general types of devices such as forceps. During the resection process, doctors need to operate in cooperation with at least a set of surgical forceps and surgical scissors. This operation highly tests the skills of doctors in a limited space, and the larger the volume of the lesion tissue, the more difficult it is to operate under the limited incision area.

[0003] In the related art, a Chinese patent with the publication number CN 113598891 A discloses a double - drive minimally invasive surgical knife structure. The surgical knife structure includes a main body structure, a grasping component, and a cutting component. The main body structure includes a fixed tube and a first limiting tube. The fixed tube and the first limiting tube are coaxially arranged, the fixed tube is located inside the first limiting tube, and there is a channel between the fixed tube and the first limiting tube. The grasping component is connected to the cutting component, and the grasping component and the cutting component are adapted to extend or retract along the channel out of the main body structure. The cutting component is used for the resection of the lesion, and the cutting component is also used for the contraction or relaxation of the end of the grasping component. This double - drive minimally invasive surgical knife can achieve the complete cutting and enveloping grasping of the lesion through the coordinated cooperation of the grasping component and the cutting component.

[0004] In the above - mentioned related art, while the cutting component drives the end of the grasping component to gradually close, the lesion tissue is cut. Since the realization of the grasping action mainly relies on the force generated by the radio - frequency heating wire on the grasping component in the direction opposite to its movement direction, which causes the grasping component to bend and deform, the shape of the formed enveloping circle is elliptical. However, this way of opening the grasping component will increase the movement resistance of the elastic jaws as the opening angle increases, and restrict the increase in the rigidity of the elastic jaws. As a result, the elastic mechanism cannot provide a large enough cutting force to the radio - frequency heating wire, affecting the cutting effect. Summary of the Invention

[0005] To improve the problem of poor cutting force in the existing surgical knife structure and further improve the efficiency of removing lesion tissue, the present invention provides a minimally invasive lesion resection and capture device and adopts the following technical solutions:

[0006] A minimally invasive lesion resection and capture device includes a main body structure, a grasping component, and a cutting component. The main body structure includes a skeleton rod and a housing component connected to each other. The grasping component includes elastic jaws and a rotating pipe fitting. The skeleton rod, the rotating pipe fitting, and the housing component are coaxially sleeved in sequence from the inside to the outside, and a channel is formed between the skeleton rod and the housing component;

[0007] The elastic clamping jaws are arranged at one end of the rotating pipe fitting. The elastic clamping jaws include a plurality of clamping pieces arranged circumferentially along the rotating pipe fitting. One end of each clamping piece is connected to the rotating pipe fitting, and each clamping piece is configured to be spirally wound around the outer periphery of the rotating pipe fitting and stored in the channel. When extending out of the channel, the plurality of clamping pieces expand into an umbrella shape.

[0008] The cutting assembly includes a wire locking structure and a cutting wire. The wire locking structure is movably arranged on the rotating pipe fitting. The cutting wire is respectively connected to the wire locking structure and the other end of the clamping piece. The wire locking structure is used to adjust the extending length of the cutting wire to drive the other ends of the plurality of clamping pieces to gather or disperse, so that the plurality of clamping pieces can be switched between a gathered state and an umbrella shape.

[0009] One end of the rotating pipe fitting far from the elastic clamping jaws is in screw pair cooperation with the housing assembly or the skeleton rod. The rotating pipe fitting is used to drive the elastic clamping jaws and the cutting assembly to be stored in the channel, or drive the elastic clamping jaws and the cutting assembly to extend out of the channel.

[0010] Optionally, the grasping assembly further includes a support member. The support member is sleeved on the skeleton rod, and the support member is axially relatively fixed to the skeleton rod.

[0011] The rotating pipe fitting includes a driving screw rod and an inner rotating pipe. One end of the driving screw rod is threadedly connected to the housing, and the other end is connected to the inner rotating pipe.

[0012] One end of the inner rotating pipe far from the driving screw rod has a fitting portion. The fitting portion is slidably and mutually fitted with the support member along the axial direction of the inner rotating pipe, and the fitting portion is fixedly connected to the clamping piece.

[0013] The cutting assembly includes cutting wires that match the number of the clamping pieces, and the cutting wires correspond to the clamping pieces one by one.

[0014] The wire locking structure is sleeved on the rotating pipe fitting. Each cutting wire extends along the corresponding clamping piece, and one end is connected to the wire locking structure, and the other end passes through the end of the corresponding clamping piece and is connected to the end of the adjacent clamping piece.

[0015] Optionally, one end of the housing assembly is provided with inclined grooves that match the number of the clamping pieces. One end of each clamping piece far from the rotating pipe fitting extends out of the channel through the inclined grooves.

[0016] Optionally, each of the clamping pieces includes a fixing part and an extending part. A plurality of the fixing parts are fixedly arranged in a spiral shape on the outer periphery of the rotating pipe fitting. One end of the extending part is connected to the end of the fixing part, and the other end extends out of the channel through the inclined groove.

[0017] Optionally, the wire locking structure includes a wire slider, a conductive slip ring, and a bearing group. The conductive slip ring is arranged inside the wire slider, and the bearing group is arranged between the conductive slip ring and the wire slider.

[0018] The conductive slip ring is fixedly arranged relative to the rotating pipe fitting in the circumferential direction and is slidably connected in the axial direction. The wire slider is fixedly arranged relative to the outer shell in the circumferential direction and is slidably connected in the axial direction. One end of the cutting wire away from the clamping piece is connected to the conductive slip ring.

[0019] Optionally, a first side slot is axially formed on the rotating pipe fitting, and the conductive slip ring is slidably connected to the first side slot.

[0020] A second side slot is axially formed on the outer shell, and the wire slider is slidably connected to the second side slot.

[0021] Optionally, the wire locking structure further includes a locking ring. The locking ring is arranged between the conductive slip ring and the bearing group, and the locking ring is used to press and fix the end of the cutting wire on the conductive slip ring.

[0022] Optionally, wire passing holes matching the number of the cutting wires are formed on the conductive slip ring, and the cutting wires are arranged in the wire passing holes.

[0023] Optionally, a wire guiding tube is arranged on each of the clamping pieces, and the cutting wire is arranged in the wire guiding tube.

[0024] The beneficial effects of the present invention compared with the prior art include:

[0025] In the minimally invasive lesion resection and capture device of the present invention, when not in use, both the cutting assembly and the grasping assembly are accommodated in the channel between the skeleton rod and the outer shell assembly. When one end of the main body structure is about to reach the lesion tissue, by rotating the rotating pipe fitting, the rotating pipe fitting moves axially and rotates along the skeleton rod, driving the elastic clamping jaws and the cutting assembly at its end to rotate and extend out of the channel. During this process, the cutting wire releases a corresponding length under the adjustment of the wire locking structure, so that the clamping pieces gradually unfold into an umbrella shape under the action of their own elasticity to envelope the lesion tissue, and then the lesion tissue is resected by the cutting wire. After the lesion tissue is resected, the cutting wire is tightened under the adjustment of the wire locking structure, so as to gather the ends of the clamping pieces to realize the grasping of the lesion tissue.

[0026] In this process, since the clip is configured to be spirally coiled around the outer periphery of the rotating tube to be accommodated in the channel, when the elastic clamp extends out of the channel driven by the rotating tube, each clip is tilted and unfolded into an umbrella shape in the same direction. Then the cutting wire is tightened by the locking wire structure, and the cutting wire generates a force opposite to its movement direction on the clip, and a tendency of contraction occurs between the ends of the clip. At the same time, under the combined action of the torque force of the rotating tube and the tensioning force of the cutting wire, each clip is deformed to form a spiral envelope. Compared with the elliptical envelope formed by the bending of the clip, each clip in the present invention has a higher degree of deformation, and the shape of the lesion is closer to the gathered shape of the clip, so that less healthy tissue can be removed while the lesion is completely removed. In addition, the deformation resistance encountered when the elastic clamp is pushed out by screwing in is smaller, which means that the rigidity of the clip can be greater, which can provide a greater cutting force for the heating wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 2 is a schematic diagram of the overall structure of a minimally invasive lesion removal and capture device according to an embodiment of the present invention;

[0028] Figure 2 2 is a schematic diagram of the main structure of a minimally invasive lesion removal and capture device according to an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of the structure of a grabbing component in an embodiment of the present invention;

[0030] Figure 4 yes Figure 1 A magnified schematic diagram of the middle A area;

[0031] Figure 5 is a schematic diagram of the structure of the elastic clamping claw when it is unfolded in an embodiment of the present invention;

[0032] Figure 6 is a schematic diagram of the structure of the elastic clamping claws when they are folded in an embodiment of the present invention;

[0033] Figure 7 is a schematic diagram of the connection between the support member and the engaging portion in an embodiment of the present invention;

[0034] Figure 8 is a partial structural schematic diagram of a grabbing component in an embodiment of the present invention;

[0035] Figure 9 is a structural schematic diagram of a wire locking structure in an embodiment of the present invention;

[0036] Figure 10 It is a side sectional view of the wire locking structure in an embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 1. Main body structure; 11. Skeleton rod; 12. Outer shell assembly; 121. First outer shell tube; 1211. Inclined groove; 122. Second outer shell tube; 1221. Second side slot; 13. Tool bit; 14. Cutting edge; 15. Channel; 2. Gripping assembly; 21. Elastic jaws; 211. Clip; 2111. Fixed part; 2112. Extended part; 2113. Movable perforation; 2114. Groove; 22. Rotating pipe fitting; 221. Driving screw; 222. Inner rotating pipe; 2221. First side slot; 23. Support; 24. Fitting part; 3. Cutting assembly; 31. Wire locking structure; 311. Wire slider; 3111. Protrusion; 312. Conductive slip ring; 3121. Wire passing hole; 313. Bearing group; 3131. Upper bearing; 3132. Lower bearing; 314. Positioning pin; 315. Locking ring; 32. Cutting wire; 33. Wire guiding tube. Detailed implementation manners

[0039] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the specific embodiments of the present invention in detail with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments described herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not used to limit the protection scope of the present invention.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific implementation manners and are not intended to limit this application;

[0041] The term "including" and its variants used herein are open-ended, that is, "including but not limited to"; the term "based on" is "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0042] To address the problems existing in the related art, the present invention provides a minimally invasive lesion resection and capture device. Referring to Figures 1 - 4 as shown, the device includes a main body structure 1, a grasping assembly 2, and a cutting assembly 3. The main body structure 1 includes a skeleton rod 11, a cutter head 13, and a housing assembly 12 that are connected to each other. The grasping assembly 2 includes elastic jaws 21 and a rotating pipe fitting 22. The skeleton rod 11, the rotating pipe fitting 22, and the housing assembly 12 are coaxially sleeved from the inside to the outside in sequence, and a channel 15 is formed between the skeleton rod 11 and the housing assembly 12. The elastic jaws 21 are provided at one end of the rotating pipe fitting 22. The elastic jaws 21 include a plurality of clamping pieces 211 arranged circumferentially along the rotating pipe fitting 22. One end of each clamping piece is connected to the rotating pipe fitting 22. Each clamping piece 211 is configured to be spirally wound around the outer periphery of the rotating pipe fitting 22 to be received in the channel 15. When extending out of the channel 15, the plurality of clamping pieces 211 unfold into an umbrella shape. The cutting assembly 3 includes a wire locking structure 31 and a cutting wire 32. The wire locking structure 31 is movably provided on the rotating pipe fitting 22. The cutting wire 32 is respectively connected to the wire locking structure 31 and the other end of the clamping piece 211. The wire locking structure 31 is used to adjust the extending length of the cutting wire 32 to drive the other ends of the plurality of clamping pieces 211 to gather or disperse, so that the plurality of clamping pieces 211 can be switched between an enveloping shape and an umbrella shape. The end of the rotating pipe fitting 22 away from the elastic jaws 21 is in threaded engagement with the housing assembly 12 or the skeleton rod 11 for movement. The rotating pipe fitting 22 is used to drive the elastic jaws 21 and the cutting assembly 3 to be received in the channel 15, or to drive the elastic jaws 21 and the cutting assembly 3 to extend out of the channel 15.

[0043] In the minimally invasive lesion resection and capture device of the present invention, when not in use, the grasping assembly 2 can be received in the channel 15 between the skeleton rod 11 and the housing assembly 12. At this time, the plurality of clamping pieces 211 in the elastic jaws 21 are in an elastically deformed state and are spirally wound around the outer periphery of the rotating pipe fitting 22. When one end of the main body structure 1 approaches the lesion tissue, by rotating the rotating pipe fitting 22, the rotating pipe fitting 22 moves axially and rotates along the skeleton rod 11, driving the elastic jaws 21 at its end to rotate and extend out of the channel 15. During this process, the cutting wire 32 releases a corresponding length under the adjustment of the wire locking structure 31, so that the plurality of clamping pieces 211 of the elastic jaws 21 gradually unfold into an umbrella shape under the action of their own elasticity, as Figure 5 shown. The plurality of clamping pieces 211 in an umbrella-shaped scattering can cover the lesion tissue, and then the lesion tissue can be resected by the cutting assembly 3 (which can be the cutting wire 32) at the ends of the plurality of clamping pieces 211. After the lesion tissue is resected, the cutting wire 32 is tightened under the adjustment of the wire locking structure 31, so that the ends of the plurality of clamping pieces 211 gather, so as to wrap the lesion tissue through the plurality of clamping pieces 211, that is, the grasping of the lesion tissue can be realized.

[0044] During this process, referring to Figures 5 - 6As shown, since the clamping pieces 211 are configured to be spirally wound around the outer periphery of the rotating pipe fitting 22 for storage in the channel 15, when the elastic clamping jaws 21 are driven by the rotating pipe fitting 22 to extend out of the channel 15, each clamping piece 211 is unfolded in an inclined shape in the same direction into an umbrella shape as shown in Figure 5 shown. Then, the cutting wire 32 is tightened by the wire locking structure 31, and the cutting wire 32 drives the ends of the plurality of clamping pieces 211 to approach each other, generating a tendency for the ends of the clamping pieces 211 to converge. At the same time, under the combined action of the torque force of the rotating pipe fitting 22 and the tension force of the cutting wire 32, each clamping piece 211 is deformed to form a spiral envelope loop surrounded by multiple spiral clamping pieces 211 as shown in Figure 6 shown. Compared with the oval envelope loop formed by bending a plurality of clamping pieces 211 with the same extension direction, each clamping piece 211 in the present invention is spirally bent, having a higher degree of deformation. The envelope loop surrounded by the plurality of clamping pieces 211 is closer to a circle, and the shape of the diseased tissue is closer to the shape of each clamping piece 211. Therefore, on the premise of completely removing the diseased tissue, the elastic clamping jaws 21 can remove less healthy tissue. In addition, when the elastic clamping jaws 21 are pushed out by the way of screwing in, the deformation resistance encountered is smaller, which means that the stiffness of the clamping pieces 211 can be greater, and thus a greater cutting force can be provided for the cutting wire 32.

[0045] If it is necessary to modify or expand the envelope target during the operation, at any moment of the movement, the expansion and retraction of the elastic clamping jaws 21 can be controlled by adjusting the extension amount of the rotating pipe fitting 22 and the extension length of the cutting wire 32, so that the scalpel has the ability to cut repeatedly in a single operation, which can greatly increase the error tolerance rate of the operation and enable the operator to have a greater correction ability during the cutting process. The skeleton rod 11 and the housing assembly 12 can play a role in guiding the extension and retraction of the grasping assembly 2 and the cutting assembly 3, so that the grasping assembly 2 and the cutting assembly 3 can only move along the direction of the channel 15, ensuring the stability of the grasping assembly 2 and the cutting assembly 3 when running along the channel 15. Through the grasping assembly 2 and the cutting assembly 3 stored in the main body structure 1, the present invention can reduce the cross-sectional area of the wound. After reaching the diseased part, the grasping assembly 2 and the cutting assembly 3 are extended and opened along the axial direction of the skeleton rod 11 to cut and grasp the diseased tissue slightly larger than the cross-sectional area of the wound, minimizing the surgical trauma of the patient to the greatest extent. At the same time, through the coordinated cooperation of the grasping assembly 2 and the cutting assembly 3, the processes of enveloping, cutting, and grasping the diseased part can be realized, ensuring the integrity and relative position certainty when the diseased part is taken out.

[0046] In an alternative embodiment, referring to Figures 2 - 6As shown, the main body structure 1 further includes a cutter head 13, which has a cutting edge 14 for cutting the epidermal tissue of the human body. The incision after cutting is used for the entry of the scalpel to achieve the grasping and resection of the lesion. The cutter head 13 is arranged at the end of the skeleton rod 11 and is threadedly connected to the skeleton rod 11. The cutter head 13 is welded or adhered to the housing assembly 12.

[0047] In an alternative embodiment, referring to Figure 1 and Figure 2 As shown, the housing assembly 12 further includes a first housing tube 121 close to the cutter head 13 and a second housing tube 122 away from the cutter head 13. The first housing tube 121 and the second housing tube 122 can be fixedly connected by means of pins, adhesion or welding. Specifically, the inner diameter of the first housing tube 121 is smaller than that of the second housing tube 122. The first housing tube 121 is used to restrict the deformation of the elastic jaws 21 and is made of a metal material such as stainless steel, having a high strength; the second housing tube 122 restricts the degrees of freedom of movement of the rotating pipe fitting 22 and the locking wire structure 31 and is made of materials such as polyurethane. Of course, in other embodiments, the first housing tube 121 and the second housing tube 122 can also be integrally formed.

[0048] In an alternative embodiment, referring to Figures 4 - 6 As shown, the end of the first housing tube 121 away from the second housing tube 122 is provided with inclined slots 1211 that match the number of the clip pieces 211. Further referring to Figure 7 As shown, each clip piece 211 includes a fixing portion 2111 and a protruding portion 2112. A plurality of fixing portions 2111 are spirally and fixedly arranged on the outer periphery of the rotating pipe fitting 22. One end of the protruding portion 2112 is fixedly connected to the fixing portion 2111, and the other end extends out of the channel 15 through the inclined slot 1211 and can spread outwards.

[0049] In the embodiment of the present invention, the spirally arranged fixing portions 2111 can guide the protruding process of the protruding portions 2112, so that the protruding portions 2112 can protrude out of the channel 15 along a direction intersecting with the axis of the rotating pipe fitting 22. The inclined slots 1211 at the end of the first housing tube 121 further guide the protruding process of the clip pieces 211, so that the clip pieces 211 can stably protrude along the inclined slots 1211. At the same time, when the elastic jaws 21 and the cutting assembly 3 are received in the channel 15, the ends of the protruding portions 2112 are received in the space of the inclined slots 1211. The inclined slots 1211 serve as a transition space between the inside of the channel 15 and the outside, which is beneficial to the stability of the protruding and receiving processes of the clip pieces 211.

[0050] In an alternative embodiment, referring to Figures 7 - 9As shown in the figure, the rotating pipe fitting 22 includes a driving screw 221 and an internally rotating pipe 222. One end of the driving screw 221 is in mating movement with the second outer shell pipe 122 or the skeleton rod 11 through a screw pair, and the other end is connected to the internally rotating pipe 222. The grasping assembly 2 further includes a support member 23. The support member 23 is sleeved on the skeleton rod 11. The support member 23 can rotate relative to the skeleton rod 11, and the support member 23 is axially fixed relative to the skeleton rod 11. Specifically, one end of the support member 23 abuts against the cutter head 13, and the other end abuts against the shoulder of the skeleton rod 11, so as to fix the support member 23 axially relative to the skeleton rod 11. Further, referring to Figure 9 As shown in the figure, an engaging portion 24 is provided at one end of the internally rotating pipe 222 away from the driving screw 221. The engaging portion 24 and the support member 23 are slidably engaged with each other along the axial direction of the internally rotating pipe 222. In the embodiment of the present invention, a plurality of clamping pieces 211 are spirally wound around the outside of the support member 23 in the same direction, and the fixing portion 2111 of each clamping piece 211 is fixedly connected to the engaging portion 24.

[0051] It should be noted that the driving screw 221 can be threadedly connected to the internal thread of the second outer shell pipe 122 or the external thread of the skeleton rod 11 to drive the internally rotating pipe 222 to axially advance relative to the main body structure 1. Preferably, a screw pair is formed between the driving screw 221 and the second outer shell pipe 122 in this embodiment.

[0052] Optionally, the support member 23 and the engaging portion 24 can be mating splines. Due to the mutual engagement of the support member 23 and the engaging portion 24, and the support member 23 is axially fixed relative to the skeleton rod 11. Therefore, when the driving screw 221 drives the internally rotating pipe 222 to axially advance and the engaging portion 24 drives the support member 23 to rotate, the key teeth of the engaging portion 24 can move along the length direction of the key groove of the support member 23, so that the clamping pieces 211 are controlled to rotate and extend along the channel 15.

[0053] Of course, in other embodiments, the support member 23 can also be replaced by an ordinary sleeve. A guiding groove is axially formed on the sleeve, and the engaging portion 24 is replaced by a rotating shaft. A limiting strip is provided on the outer side wall of the rotating shaft. The limiting strip is clamped in the guiding groove and can advance along the direction of the guiding groove, which can also drive the clamping pieces 211 to rotate and extend.

[0054] In an optional embodiment, the number of cutting wires 32 matches the number of clamping pieces 211, and the cutting wires 32 correspond to the clamping pieces 211 one by one. The wire locking structure 31 is sleeved on the rotating pipe fitting 22. Each cutting wire 32 extends along the corresponding clamping piece 211, and one end is connected to the wire locking structure 31, and the other end passes through the end of the corresponding clamping piece 211 and is connected to the end of the adjacent clamping piece 211. Specifically, referring to Figure 5 and Figure 8As shown, at the end of each clip 211 away from the rotating pipe fitting 22, there is a movable perforation 2113. One end of each cutting wire 32 away from the wire locking structure 31 passes through the movable perforation 2113 on the corresponding clip 211 and is fixedly connected to the end on the adjacent clip 211, and each cutting wire 32 is connected in series in the same direction in sequence. When the cutting wire 32 is tightened through the wire locking structure 31, each cutting wire 32 can generate a converging force on the adjacent clip 211. Under the simultaneous tightening of multiple cutting wires 32, each clip 211 deforms in the same direction to form the final spiral envelope loop.

[0055] In the embodiment of the present invention, when it is necessary to extend the elastic clamping jaw 21, the cutting wire 32 is released through the wire locking structure 31 to adapt to the unfolding of the elastic clamping jaw 21. When it is necessary to perform a grasping action, the cutting wire 32 is tightened through the wire locking structure 31, so that the elastic clamping jaw 21 shows a converging tendency. The cutting wire 32 in the embodiment of the present invention can be a radio frequency heating wire, and the radio frequency heating wire cuts the diseased tissue through the electro-cutting effect.

[0056] In an alternative embodiment, referring to Figure 9 and Figure 10 As shown, the wire locking structure 31 includes a wire slider 311, a conductive slip ring 312 and a bearing group 313. The bearing group 313 is arranged between the conductive slip ring 312 and the wire slider 311. The conductive slip ring 312 is fixedly connected to the rotating pipe fitting 22 in the circumferential direction and is slidably connected in the axial direction. The wire slider 311 is fixedly connected to the second outer shell tube 122 in the circumferential direction and is slidably connected in the axial direction. One end of the cutting wire 32 away from the clip 211 is connected to the conductive slip ring 312.

[0057] Referring to Figure 10 As shown, the bearing group 313 in the embodiment of the present invention specifically may include an upper bearing 3131 and a lower bearing 3132 to realize the relative rotation of the conductive slip ring 312 and the wire slider 311. In the embodiment of the present invention, the pulse signal on the high-frequency generator is transmitted to the cutting wire 32 through the conductive slip ring 312. There is no relative rotation between the conductive slip ring 312 and the rotating pipe fitting 22, and there is no relative rotation between the wire slider 311 and the second outer shell tube 122. Therefore, when the rotating pipe fitting 22 advances spirally in the axial direction, the conductive slip ring 312 rotates and advances together with the rotating pipe fitting 22 to release the cutting wire 32. When the rotating pipe fitting 22 drives the elastic clamping jaw 21 to rotate and retract into the channel 15, the conductive slip ring 312 rotates together with the rotating pipe fitting 22 to drive the cutting wire 32 to wind around the outside of the rotating pipe fitting 22. When it is necessary to perform a grasping action, by applying an axial pulling force to the wire slider 311, driving the conductive slip ring 312 to move axially along the rotating pipe fitting 22 together, the cutting wire 32 can be tightened to make the elastic clamping jaw 21 converge.

[0058] Specifically, referring to Figure 10As shown, a first side slot 2221 is axially formed on the inner rotating tube 222, and the conductive slip ring 312 is slidably connected to the first side slot 2221. Specifically, the rotation constraint is achieved by inserting a positioning pin 314 into the first side slot 2221 of the inner rotating tube 222. A second side slot 1221 is axially formed on the second outer shell tube 122, and the wire slider 311 is slidably connected to the second side slot 1221. Specifically, the rotation constraint is achieved by inserting a protrusion 3111 on the side of the wire slider 311 into the second side slot 1221. When grasping the diseased tissue, sliding the protrusion 3111 on the wire slider 311 upward along the length direction of the second side slot 1221 can drive the conductive slip ring 312 to move axially together, thereby tightening the cutting wire 32 to make the elastic jaws 21 close up.

[0059] Furthermore, referring to Figure 10 As shown, in an alternative embodiment, the wire locking structure 31 further includes a locking ring 315, which is disposed between the conductive slip ring 312 and the bearing group 313, specifically, it can be the upper bearing 3131 or the lower bearing 3132. The locking ring 315 is used to press and fix the end of the cutting wire 32 on the conductive slip ring 312. In addition, through holes 3121 matching the number of the cutting wires 32 are formed on the conductive slip ring 312, and the cutting wires 32 are threaded through the through holes 3121, specifically, they can be formed on the inner side wall of the conductive slip ring 312. Specifically, the routing process of the cutting wire 32 refers to Figure 10 As shown: for the convenience of distinction, the cutting wire 32 in the figure is thickened. The end of the cutting wire 32 passes through the through hole 3121 in the conductive slip ring 312, reaches the lower end of the conductive slip ring 312, then bends from the lower end, and passes through the through hole between the conductive slip ring 312 and the lower bearing 3132, and exits to the shoulder between the locking ring 315 and the conductive slip ring 312. The lower bearing 3132 presses the locking ring 315, thereby firmly positioning the cutting wire 32 on the conductive slip ring 312.

[0060] Of course, in other embodiments, the wire locking structure 31 can also lock the wire in the following ways: for example, a ball joint can be melted at the end of the cutting wire 32, the conductive slip ring 312 is prepared by an injection molding process, and the ball joint and a part of the cutting wire 32 are injection molded into the conductive slip ring 312; or, the conductive slip ring 312 adopts a structure in which two sleeves are sleeved with each other, and the cutting wire 32 is clamped into the gap between the two sleeves, and the two sleeves are tightened, so as to achieve the effect of clamping the cutting wire 32.

[0061] In an alternative embodiment, referring to Figure 6, a groove 2114 is formed in each clamping piece 211 along the length direction, a wire guiding tube 33 is embedded in each groove 2114, and a cutting wire 32 is threaded through the wire guiding tube 33. The wire guiding tube 33 is beneficial to protecting the cutting wire 32 and guiding the extending direction of the cutting wire 32, so as to avoid interference between adjacent cutting wires 32.

[0062] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A minimally invasive lesion resection and capture device, characterized in that It includes a main body structure (1), a grasping component (2) and a cutting component (3); The main body structure (1) includes a skeleton rod (11) and a housing component (12) connected to each other. The grasping component (2) includes elastic jaws (21) and a rotating pipe fitting (22). The skeleton rod (11), the rotating pipe fitting (22) and the housing component (12) are coaxially sleeved in sequence from the inside to the outside. A channel (15) is formed between the skeleton rod (11) and the housing component (12); The elastic jaws (21) are arranged at one end of the rotating pipe fitting (22). The elastic jaws (21) include a plurality of clip pieces (211) arranged along the circumferential direction of the rotating pipe fitting (22). One end of each clip piece (211) is connected to the rotating pipe fitting (22). Each clip piece (211) is configured to be spirally wound around the outer periphery of the rotating pipe fitting (22) and stored in the channel (15). When extending out of the channel (15), the plurality of clip pieces (211) expand into an umbrella shape; The cutting component (3) includes a wire locking structure (31) and a cutting wire (32); the wire locking structure (31) is movably arranged on the rotating pipe fitting (22). The cutting wire (32) is respectively connected to the wire locking structure (31) and the other end of the clip piece (211). The wire locking structure (31) is used to adjust the extending length of the cutting wire (32) to drive the other ends of the plurality of clip pieces (211) to gather or disperse, so that the plurality of clip pieces (211) are switched between a gathered state and an umbrella shape; One end of the rotating pipe fitting (22) far from the elastic jaws (21) is in screw pair cooperation with the housing component (12) or the skeleton rod (11). The rotating pipe fitting (22) is used to drive the elastic jaws (21) and the cutting component (3) to be stored in the channel (15), or drive the elastic jaws (21) and the cutting component (3) to extend out of the channel (15); One end of the housing component (12) is provided with inclined slots (121) matching the number of the clip pieces (211). One end of each clip piece (211) far from the rotating pipe fitting (22) extends out of the channel (15) through the inclined slot (121); Each clip piece (211) includes a fixing part (2111) and an extending part (2112). The plurality of fixing parts (2111) are spirally and fixedly arranged on the outer periphery of the rotating pipe fitting (22). One end of the extending part (2112) is connected to the end of the fixing part (2111), and the other end extends out of the channel (15) through the inclined slot (121).

2. The minimally invasive lesion resection and capture device according to claim 1, wherein, The grasping component (2) further includes a support member (23). The support member (23) is sleeved on the skeleton rod (11), and the support member (23) is axially relatively fixed to the skeleton rod (11); The rotating pipe fitting (22) includes a driving screw (221) and an internally rotating pipe (222). One end of the driving screw (221) is threadedly connected to the housing component (12), and the other end is connected to the internally rotating pipe (222); One end of the inner rotating tube (222) away from the driving screw (221) has a fitting portion (24), and the fitting portion (24) and the support member (23) are slidably fitted to each other along the axial direction of the inner rotating tube (222), and the fitting portion (24) is fixedly connected to the clamping piece (211).

3. The minimally invasive lesion resection and capture device according to claim 1, wherein The cutting assembly (3) includes cutting wires (32) that match the number of the clamping pieces (211), and the cutting wires (32) correspond to the clamping pieces (211) one by one; The wire locking structure (31) is sleeved on the rotating pipe fitting (22), and each cutting wire (32) extends along the corresponding clamping piece (211), and one end thereof is connected to the wire locking structure (31), and the other end passes through the end of the corresponding clamping piece (211) and is connected to the end of the adjacent clamping piece (211).

4. The minimally invasive lesion resection and capture device according to claim 1, characterized in that, The wire locking structure (31) includes a wire slider (311), a conductive slip ring (312) and a bearing group (313), and the bearing group (313) is arranged between the conductive slip ring (312) and the wire slider (311); The conductive slip ring (312) is fixedly connected to the rotating pipe fitting (22) in the circumferential direction and slidably connected in the axial direction, the wire slider (311) is fixedly connected to the outer shell in the circumferential direction and slidably connected in the axial direction, and one end of the cutting wire (32) away from the clamping piece (211) is connected to the conductive slip ring (312).

5. The minimally invasive lesion resection and capture device according to claim 4, wherein A first side slot (2221) is axially formed on the rotating pipe fitting (22), and the conductive slip ring (312) is slidably connected to the first side slot (2221); A second side slot (122) is axially formed on the outer shell, and the wire slider (311) is slidably connected to the second side slot (122).

6. The minimally invasive lesion resection and capture device according to claim 4, wherein The wire locking structure (31) further includes a locking ring (315), and the locking ring (315) is arranged between the conductive slip ring (312) and the bearing group (313), and the locking ring (315) is used for pressing and fixing the end of the cutting wire (32) on the conductive slip ring (312).

7. The minimally invasive lesion resection and capture device according to claim 4, characterized in that, Through holes (3121) that match the number of the cutting wires (32) are formed on the conductive slip ring (312), and the cutting wires (32) are arranged in the through holes (3121).

8. The minimally invasive lesion resection and capture device according to claim 1, wherein A wire guiding tube (33) is arranged on each clamping piece (211), and the cutting wire (32) is arranged in the wire guiding tube (33).

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