Biopsy forceps

Abstract

The utility model provides a kind of biopsy forceps, including main body structure, clamping structure, push structure and bending structure, the distal end of push structure is connected with clamping structure to make it be in open state or closed state, bending structure includes bending wire, rotating frame, positioning rod, moving block, the distal end of bending wire is fixedly connected with the distal end of clamping structure or main body structure, the proximal end of bending wire is fixedly connected with moving block, positioning rod is equipped with the cavity of accommodating moving block, moving block is threadedly connected with rotating frame to be driven moving block in cavity along predetermined direction by rotating rotating frame to pull or release bending wire, and then make the distal end of main body structure or clamping structure bend.The utility model is rotated by rotating frame, so that moving block moves along predetermined direction in rotating frame, and then pull or release bending wire, to drive the distal end of main body structure or clamping structure bend, so that clamping structure can smoothly enter into curved bronchus.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a biopsy forceps. Background Technology

[0002] Chronic obstructive pulmonary disease (COPD) is a chronic airway disease characterized by airflow limitation. Its incidence is rising, with high rates of disability and mortality, imposing a heavy direct and indirect medical burden on patients and society. Emphysema is the main pathological type of COPD. While medication is the primary treatment for emphysema, its effectiveness in improving symptoms and lung function in severe cases is limited. Surgical and bronchoscopic interventions are less common due to cost and postoperative complications. However, with advancements in medical technology, transbronchial one-way valve placement has emerged as a novel, effective, and minimally invasive treatment for emphysema. This technique can significantly improve lung function and quality of life, and reduce the risk of inflammation and complications. Therefore, this study focuses on the delivery device for transbronchial one-way valve placement.

[0003] In existing technologies, one-way valve implantation involves placing a one-way valve within a specific bronchus via bronchoscopy, forming a one-way valve that allows air and secretions to drain from the target lung lobe while preventing air re-entry, thus causing the target lung lobe to collapse and improving lung function. One-way valve delivery systems use the endoscopic cavity as the delivery medium, meaning instruments are loaded and delivered through the endoscopic cavity. This significantly reduces the endoscope's ability to adjust its curvature. When encountering bronchioles with multiple bends and large angles, it becomes difficult to implant the one-way valve at a distal target location, affecting the smooth progress of the surgery and increasing patient discomfort. Utility Model Content

[0004] In order to overcome the above-mentioned technical problems, this utility model provides a biopsy forceps that can solve the above-mentioned technical problems.

[0005] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0006] A biopsy forceps includes a main structure, a clamping structure disposed at the distal end of the main structure, a pushing structure disposed on the main structure, and a bending structure. The distal end of the pushing structure is connected to the clamping structure to put it into an open or closed state. The bending structure includes a bending wire, a rotating frame, a positioning rod housed in the rotating frame, and a moving block. The distal end of the bending wire is fixedly connected to the distal end of the clamping structure or the main structure, and the proximal end of the bending wire is fixedly connected to the moving block. One end of the positioning rod is connected to the main structure, and the positioning rod has a cavity for housing the moving block. The moving block is threadedly connected to the rotating frame so that by rotating the rotating frame, the moving block is driven to move in a predetermined direction within the cavity to pull or release the bending wire, thereby bending the distal end of the main structure or the clamping structure.

[0007] Preferably, the positioning rod includes a positioning part and a connecting part disposed at one end of the positioning part and connected to the main structure. The cavity is disposed in the positioning part, and the connecting part is provided with a first through hole communicating with the cavity. The bending wire passes through the first through hole.

[0008] Preferably, the positioning rod further includes a limiting part disposed at the other end of the positioning part, and the rotating frame is located between the limiting part and the connecting part.

[0009] Preferably, the proximal end of the bending wire passes through the moving block along the predetermined direction, and an abutment block is fixed to the proximal end of the bending wire, the abutment block abutting against the moving block.

[0010] Preferably, the movable block is provided with a first groove, and the abutting block is received in the first groove.

[0011] Preferably, the movable block is provided with a second groove, which communicates with the first groove. A support block is provided in the second groove, and the support block is provided with a through hole. The proximal end of the bending wire passes through the through hole and extends into the first groove.

[0012] Preferably, the main structure includes a support rod and an elastic element disposed at the distal end of the support rod. The proximal end of the elastic element is fixedly connected to the distal end of the support rod, and the distal end of the elastic element is fixedly connected to the clamping structure. Specifically: the distal end of the elastic element includes a fixing portion located radially outward; the distal end of the bending wire extends into the interior of the elastic element and is wound and fixed to the fixing portion; or, the distal end of the bending wire extends into the interior of the elastic element and passes through a gap at the distal end of the elastic element; the distal end of the bending wire is provided with a fixing block; in the axial direction of the elastic element, the size of the fixing block is larger than the maximum size of the gap to engage with the gap; or, the distal end of the bending wire extends into the interior of the elastic element and is fixedly connected to the clamping structure.

[0013] Preferably, the distal end of the support rod is provided with a first cavity, the proximal end of the elastic element is received in the first cavity and fixedly connected to the support rod, the support rod is provided with a second through hole, one end of the second through hole is connected to the first through hole and the other end is connected to the first cavity, and the bending wire passes through the second through hole to extend into the interior of the first cavity and the elastic element.

[0014] Preferably, the pushing structure includes a pushing rod and a driving block disposed at the proximal end of the pushing rod. The distal end of the pushing rod is connected to the clamping structure. The support rod has an elongated hole that communicates with the first cavity. The proximal end of the pushing rod passes through the first cavity and extends into the elongated hole. At least a portion of the driving block extends into the elongated hole and is fixedly connected to the proximal end of the pushing rod.

[0015] Preferably, the distal end of the push rod is provided with a thinning portion, which is directly opposite the distal end of the elastic element.

[0016] Preferably, the spring spacing at the distal end of the elastic element is between 0.3 mm and 0.5 mm; and / or, the outer diameter of the distal end of the elastic element is smaller than the outer diameter of the proximal end of the elastic element, and the distal end of the elastic element wraps around the distal end of the push rod.

[0017] This utility model has at least the following beneficial effects:

[0018] This biopsy forceps, through rotating the rotating frame, causes the moving block to move in a predetermined direction within the rotating frame, thereby pulling or releasing the bending wire, so as to drive the distal end of the main structure or the clamping structure to bend or restore, so that the clamping structure can smoothly enter the curved bronchus, so as to implant the implant into the curved bronchus. It is simple to operate, convenient to use, improves the success rate of surgery, and reduces the patient's pain. Attached Figure Description

[0019] Figure 1 This is a front view of the biopsy forceps of this utility model;

[0020] Figure 2 yes Figure 1 The image shown is a top view of the biopsy forceps of this utility model;

[0021] Figure 3 yes Figure 2 The image shown is a cross-sectional view of the biopsy forceps of this invention along line AA.

[0022] Figure 4 yes Figure 3 The image shown is a partial enlarged view of part B of the biopsy forceps of this utility model;

[0023] Figure 5 yes Figure 1The exploded view shown is of the biopsy forceps of this utility model;

[0024] Figure 6 yes Figure 5 The figure shows a perspective view of the movable block of the biopsy forceps of this utility model;

[0025] Figure 7 yes Figure 3 The diagram shown is a structural schematic of the first embodiment of the bending wire of the biopsy forceps of this utility model;

[0026] Figure 8 yes Figure 3 The diagram shown is a structural schematic of the second embodiment of the bending wire of the biopsy forceps of this utility model;

[0027] Figure 9 yes Figure 1 The figure shown is a perspective view of the clamping structure of the biopsy forceps of this utility model in the open state.

[0028] Figure 10 yes Figure 9 A partial enlarged view of the clamping structure shown;

[0029] Figure 11 yes Figure 1 The image shown is a front view of the biopsy forceps of this invention in the closed state.

[0030] Figure 12 yes Figure 11 A partial enlarged view of the clamping structure shown;

[0031] Figure 13 yes Figure 1 The diagram shows another embodiment of the push rod of the biopsy forceps of this utility model.

[0032] Explanation of icon numbers:

[0033] 100-Biopsy forceps; 1-Main structure; 11-Support rod; 111-Snapping block; 112-Second through hole; 113-Elongated hole; 114-First cavity; 12-Handle; 121-Snapping groove; 13-Elastic element; 131-Fixing part; 14-First limiting element; 2-Clamping structure; 21-Positioning frame; 211-Third through hole; 212-Second cavity; 22-First rotating part; 221-Fourth through hole; 23-Second rotating part; 24-Clamping part; 241-Fifth through hole; 3-Pushing structure; 31-Drive block; 311-Third groove; 32-Push rod; 321-Thinning part; 322-Sixth through hole; 33-Second limiting member; 4-Bending structure; 41-Positioning rod; 411-Positioning part; 4111-Cavity; 412-Limiting part; 413-Connecting part; 42-Rotating frame; 43-Moving block; 44-Bending screw; 45-Protrusion; 46-Fixing block. Detailed Implementation

[0034] The biopsy forceps provided by the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some, not all, embodiments of the present invention, and the present invention can be implemented in many other ways different from those described herein.

[0035] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0036] It should be noted that all directional indications in the embodiments of this specification are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0037] In one embodiment, the biopsy forceps 100 of this utility model includes a main structure 1, a clamping structure 2 disposed at the distal end of the main structure 1, a pushing structure 3 disposed on the main structure 1, and a bending structure 4, as shown below. Figures 1 to 13 As shown.

[0038] Preferably, the main structure 1 is the body structure of the biopsy forceps, with its distal end extending into the patient's bronchus or other tubes in the body, such as blood vessels, while the proximal end is outside the body to facilitate the operator's grip, thereby facilitating the implantation of the implant into the bronchus.

[0039] It should be noted that the distal end mentioned above is the end furthest from the operator, and the proximal end mentioned above is the end closest to the operator.

[0040] More preferably, the main structure 1 is elongated, and its length can be set as needed so that it can extend into the target position inside the bronchus, without being specifically limited here.

[0041] More preferably, the clamping structure 2 is disposed at the distal end of the main structure 1, and the clamping structure 2 can be implanted into the bronchus along with the distal end of the main structure 1 so that the implant held therein can be implanted into the target position in the bronchus.

[0042] It should be noted that the above clamping structure can be existing technology, and will not be described in detail here.

[0043] More preferably, the pushing structure 3 is disposed on the main structure 1. It can be disposed inside the main structure 1, outside the main structure 1, or partially outside and partially inside the main structure 1, etc., without specific limitations. In this embodiment, the pushing structure 3 is disposed inside the main structure 1.

[0044] Furthermore, the pushing structure 3 is movably mounted on the main structure 1, allowing the pushing structure 3 to move back and forth along the length of the main structure 1, so as to open or close the clamping structure 2, facilitating the clamping or release of the implant.

[0045] Furthermore, the bending structure 4 is disposed on the main structure 1, preferably on the outside of the main structure 1, so that the operator can bend the far end of the main structure 1 or the clamping structure 2.

[0046] Furthermore, the bending structure 4 is connected to the main structure 1 and is located near the end of the main structure 1, thus facilitating user operation.

[0047] In one embodiment, the distal end of the pushing structure 3 is connected to the clamping structure 2 to place it in an open or closed state, such as... Figures 9 to 12 As shown.

[0048] Preferably, the distal end of the pushing structure 3 is connected to the clamping structure 2, so that when the pushing structure 3 pushes the clamping structure 2 distally along the main structure 1, the clamping structure 2 opens, or when the pushing structure 3 pulls the clamping structure 2 proximally along the main structure 1, the clamping structure 2 closes, thus completing the opening and closing operation of the clamping structure 2 and realizing the clamping or release of the implant.

[0049] More preferably, the distal end of the pushing structure 3 and the proximal end of the clamping structure 2 can be rotatably connected by a connecting shaft, or other connection methods can be used, as long as they enable the clamping structure 2 to open or close, without being specifically limited here.

[0050] Preferably, the distal end of the pushing structure 3 extends into the bronchus along with the distal end of the main structure 1, while the proximal end of the pushing structure 3 is outside the body, making it convenient for the user to grasp the proximal end of the pushing structure 3 to move the pushing structure 3. The operation is simple and convenient.

[0051] In one embodiment, the bending structure 4 includes a bending wire 44, a rotating frame 42, a positioning rod 41 housed within the rotating frame 42, and a moving block 43. The distal end of the bending wire 44 is fixedly connected to the distal end of the clamping structure 2 or the main structure 1. Figures 1 to 13 As shown.

[0052] Preferably, the bending wire 4 is made of stainless steel, which not only ensures its structural strength and stability, but also allows the distal end of the main structure 1 or the clamping structure 2 to bend, making it easier to insert into the curved bronchus.

[0053] More preferably, the distal end of the bending wire 4 is fixedly connected to the clamping structure 2, for example, the distal end of the bending wire 44 is fixedly connected to the proximal end of the clamping structure 2, so that when the bending wire 4 is tightened, the clamping structure 2 bends to be more easily implanted into the curved bronchus.

[0054] It should be noted that the far end of the bending wire 44 and the near end of the clamping structure 2 can be fixedly connected by welding or other methods, and no specific limitation is made here.

[0055] Preferably, the distal end of the bending wire 4 is fixedly connected to the distal end of the main structure 1, so that when the bending wire 4 is tightened, the distal end of the main structure 1 can bend to drive the clamping structure 2 to bend accordingly, so as to be more easily implanted into the curved bronchus.

[0056] Preferably, the rotating frame 42 is rotatably disposed on the outside of the main structure 1, so that the operator can hold the rotating frame 42 and rotate it to meet the need to pull the bending wire 44. Furthermore, the rotating frame 42 is made of rubber or silicone material.

[0057] It should be noted that the rotating frame 42 can be a cylinder, a cuboid, or other geometric shapes, as long as the inner cavity is cylindrical. The inner wall of the rotating frame 42 is provided with internal threads, but no specific limitation is made here.

[0058] Furthermore, the movable block 43 is housed within the rotating frame 42, and the movable block 43 is threadedly connected to the inner wall of the rotating frame 42. This allows the movable block 43 to move within the rotating frame 42 in a predetermined direction when the rotating frame 42 rotates, thereby pulling the bending wire 44 to tighten or release it. Furthermore, the movable block 43 is preferably made of silicone or rubber material.

[0059] It should be noted that the coefficient of friction of both the rotating frame 42 and the moving block 43 is any value between 0.1 and 0.5, such as 0.1, 0.2, 0.3, 0.4, 0.5, etc. The specific values ​​can be set as needed and are not specifically limited here. It is precisely this limitation on the range of friction coefficients that enables the rotating frame 42 and the moving block 43 to have a self-locking function, facilitating the fixing of the angle during use and improving ease of use.

[0060] It should also be noted that the internal thread of the rotating frame 42 and the external thread of the moving block 43 both meet the following conditions: the thread angle is 60 degrees and the thread helix angle is any value between 3 and 5 degrees. In combination with the above-mentioned limitation of the friction coefficient range, not only is the structure simplified, but the self-locking function is also more significant and the operation is more convenient.

[0061] Furthermore, the positioning rod 41 is disposed inside the rotating frame 42. The positioning rod 41 is used to position the moving block 43, so that the moving block 43 can move in a predetermined direction within the positioning rod 41 when the rotating frame 42 rotates, thereby meeting the movement requirements of the moving block 43.

[0062] In one embodiment, the proximal end of the bending wire 44 is fixedly connected to the moving block 43, one end of the positioning rod 42 is connected to the main body structure 1, the positioning rod 41 has a cavity 4111 for receiving the moving block 43, the moving block 43 is threadedly connected to the rotating frame 42 so that by rotating the rotating frame 42, the moving block 43 is driven to move in a predetermined direction x within the cavity 4111 to pull or release the bending wire 44, thereby causing the distal end of the main body structure or the clamping structure to bend, such as... Figures 1 to 13 As shown.

[0063] Preferably, the proximal end of the bending wire 44 is fixedly connected to the moving block 43, so that the moving block 43 pulls or releases the bending wire 44 when it moves within the rotating frame 42, so as to meet the bending requirements.

[0064] More preferably, the positioning rod 41 is elongated, and one end of the positioning rod 41 is fixedly connected to the main structure 1, thereby fixing the positioning rod 41 to the outside of the main structure 1. In other embodiments, the positioning rod 41 can also be detachably fixed to the main structure 1, which is not specifically limited here.

[0065] Preferably, the positioning rod 41 has a cavity 4111 extending in a predetermined direction x, and the moving block 43 is housed in the cavity 4111, so that the moving block 43 can move in the cavity 4111 in the predetermined direction x to pull or release the bending wire 44.

[0066] It should be noted that: at least part of the inner wall of the cavity 4111 is a plane extending in a predetermined direction, and the moving block 43 is provided with an abutting surface 433 that abuts against the inner wall of the plane of the cavity 4111. At least part of the abutting surface 433 is a plane, so that the moving block 43 can move in the cavity 4111 in the predetermined direction x, and prevent the moving block 43 from rotating in the cavity 4111.

[0067] Preferably, the movable block 43 is threadedly connected to the rotating frame 42, so that when the rotating frame 42 rotates, the movable block 43 moves in the cavity 4111 along the predetermined x direction due to the positioning effect of the positioning rod 41 on the movable block 43, thereby tightening or releasing the bending wire 44, which in turn drives the distal end of the main structure 1 or the clamping structure 2 to bend so as to be implanted into the bent bronchus.

[0068] It should be noted that the aforementioned predetermined direction x is the extension direction of the positioning rod 41. The predetermined direction x is perpendicular to or intersects with the extension direction of the main structure 1, so that the moving block 43 can tighten or release the bending wire 44 when it moves along the predetermined direction x. No specific limitation is made here.

[0069] It should be further explained that when the moving block 43 moves, it pulls the distal end of the main structure 1 or the clamping structure 2 through the bending wire 44, thereby bending the distal end of the main structure 1. The bending angle can reach up to 80 degrees to meet the bending requirements and allow it to be smoothly implanted into the bent bronchus. The bending angle mentioned above is the angle between the extension direction of the clamping structure 2 and the extension direction of the proximal end of the main structure 1.

[0070] Furthermore, it should be noted that: preferably, the displacement range of the moving block 43 is 1mm to 3mm, and the bending angle of the distal end of the main structure 1 is 5 degrees to 20 degrees, thereby meeting the implantation requirements of most curved bronchi.

[0071] In one embodiment, the positioning rod 41 includes a positioning part 411 and a connecting part 413 disposed at one end of the positioning part 411 and connected to the main body structure 1. A cavity 4111 is disposed in the positioning part 411. The connecting part 413 has a first through hole 4131 communicating with the cavity 4111. The bending wire 44 passes through the first through hole 4131. Figures 3 to 5 As shown.

[0072] Preferably, the positioning part 411 is elongated, with one end of the positioning part 411 close to the main structure 1 and the other end far away from the main structure 1.

[0073] More preferably, the cavity 4111 is disposed on the positioning part 411, so that the cavity 4111 extends along a predetermined direction x, so that one end of the cavity 4111 is close to the main structure 1 and the other end is away from the main structure 1. When the moving block 43 moves in the cavity 4111, the moving block 43 can move closer to or away from the main structure 1 so as to tighten or release the bending wire 44 and realize the bending requirement.

[0074] Preferably, the connecting part 413 is disposed between the positioning part 411 and the main structure 1. One end of the connecting part 413 is fixedly connected to the positioning part 411, and the other end is fixedly connected to the main structure 1, so that the positioning rod 41 can be firmly fixed on the main structure 1, thus meeting the requirement for fixing the positioning rod 41.

[0075] Preferably, the connecting part 413 has a protrusion 45 at one end near the main structure 1. The protrusion 45 is fixedly connected to the connecting part 413 or integrally formed, so that it is fixed to the main structure 1 through the protrusion 45, thereby realizing the fixed connection between the positioning rod 41 and the main structure 1.

[0076] More preferably, the first through hole 4131 penetrates both ends of the connecting part 413. In this embodiment, the first through hole 4131 penetrates the protrusion 45. One end of the first through hole 4131 is connected to the cavity 4111. The proximal end of the bending wire 44 passes through the first through hole 4131 and extends into the cavity 4111 to be fixedly connected with the moving block 43, so that the bending wire 44 can be pulled or released by the moving block 43.

[0077] In one embodiment, the positioning rod 41 further includes a limiting part 412 disposed at the other end of the positioning part 411, and the rotating frame 42 is located between the limiting part 412 and the connecting part 413, such as Figures 3 to 5 As shown.

[0078] Preferably, the limiting part 412 is disposed at the end of the positioning part 411 away from the main structure 1, so that the positioning part 411 is positioned between the limiting block 412 and the connecting part 413.

[0079] More preferably, the ends of the limiting part 412 and the positioning part 411 are fixedly connected or integrally formed, thereby ensuring the stability of the structure.

[0080] Preferably, the rotating frame 42 is rotatably disposed between the limiting part 412 and the connecting part 413, thereby preventing the rotating frame 42 from disengaging from the positioning part 411 on the one hand, and allowing the rotating frame 42 to rotate between the limiting part 412 and the connecting part 413 on the other hand, thereby driving the moving block 43.

[0081] Preferably, the shape of the limiting part 412 can be set as needed, such as a cylinder, a cuboid or other geometric shape, etc., without being specifically limited here.

[0082] More preferably, the rotating frame 42 can be made of rubber or silicone material, or other materials, without specific limitations.

[0083] In one embodiment, the proximal end of the bending wire 44 passes through the moving block 43 along a predetermined direction x, and an abutment block 47 is fixed to the proximal end of the bending wire 44, the abutment block 47 abutting against the moving block 43, such as... Figures 3 to 5 As shown.

[0084] Preferably, the bending wire 44 passes through the moving block 43 and extends in a predetermined direction, so that the proximal end of the bending wire 44 can be firmly fixed on the moving block 43, effectively preventing the moving block 43 from separating from the proximal end of the bending wire 44.

[0085] More preferably, the abutment block 47 can be a sphere, cylinder, cuboid or other geometric shape, and its specific shape can be set as needed, without being specifically limited here.

[0086] Preferably, the abutment block 47 is located on the side of the movable block 43 away from the main structure 1, so that the movable block 43 is between the abutment block 47 and the main structure 1.

[0087] Preferably, the proximal end of the bending wire 44 passes through the moving block 43 and is fixedly connected to the abutment block 47, thereby achieving a fixed connection between the bending wire 44 and the moving block 43 by the abutment block 47 abutting against the moving block 43, so that the bending wire is tightened or released when the moving block 43 moves.

[0088] In one embodiment, the movable block 43 is provided with a first groove 432, and the abutting block 47 is received within the first groove 432, such as... Figures 3 to 6 As shown.

[0089] Preferably, the shape of the first groove 432 can be a cuboid, a semi-cylinder, a hemisphere, or other geometric shapes, and its specific shape can be set as needed, without being specifically limited here.

[0090] More preferably, the abutment block 47 is received in the first groove 432, thereby defining and fixing the abutment block 47 in the first groove 432, preventing the abutment block 47 and the proximal end of the bending wire 44 from disengaging from the moving block 43.

[0091] More preferably, the shape of the abutment block 47 may or may not be compatible with the shape of the first groove 432. It is only necessary to ensure that the abutment block 47 can be accommodated in the first groove 432. No specific limitation is made here.

[0092] In one embodiment, the movable block 43 is provided with a second groove 431, which communicates with the first groove 432. A support block 48 is provided within the second groove 431, and the support block 48 is provided with a through hole 481. The proximal end of the bending wire 44 passes through the through hole 481 and extends into the first groove 432. Figures 3 to 6 As shown.

[0093] Preferably, the second groove 431 is located between the first groove 432 and the connecting part 413. The second groove 431 can be a cuboid, a semi-cylinder, a hemisphere or other geometric shape, and its specific shape can be set as needed, without being specifically limited here.

[0094] More preferably, the second groove 431 communicates with the first groove 432, so that the proximal end of the bending wire 44 passes through the second groove 431 and the first groove 432 respectively.

[0095] Preferably, the support block 48 is received in the second groove 431, and the second groove 431 limits the support block 48 to prevent the support block 48 from falling out of the second groove 431. The shape of the support block 48 may or may not be compatible with the shape of the second groove 431. Its specific shape can be set as needed and is not specifically limited here.

[0096] Preferably, the support block 48 is provided with a through hole 481 through which the bending wire 44 passes to achieve a fixed connection between the proximal end of the bending wire 44 and the abutment block 47. The support block 48 effectively fixes the proximal end of the bending wire 44 to the moving block 43, ensuring the stability of the structure.

[0097] More preferably, the second groove 431 is provided on the abutment surface 433, so that the support block 48 can be easily accommodated in the second groove 431, which is simple to operate and convenient to use.

[0098] Furthermore, the movable block 43 is provided with a connecting hole 434. The upper end of the connecting hole 434 is connected to the second groove 431, and the lower end of the connecting hole 434 is connected to the bottom surface of the movable block 43. This facilitates the near end of the bending wire 44 to pass through the connecting hole 434 and extend into the second groove 431, thus facilitating the assembly of the support block 48 and the movable block 43.

[0099] In one embodiment, the main structure 1 includes a support rod 11 and an elastic element 13 disposed at the distal end of the support rod 11. The proximal end of the elastic element 13 is fixedly connected to the distal end of the support rod 11, and the distal end of the elastic element 13 is fixedly connected to the clamping structure 2. Figures 1 to 6 As shown.

[0100] Preferably, the support rod 11 is elongated and is preferably made of rubber or silicone material, but may also be made of other materials, which are not specifically limited here.

[0101] More preferably, the distal end of the support rod 11 is provided with an elastic element 13, the distal end of which is used to extend into the bronchus. The elastic element 13 is elastic, so it can be easily bent inside the bronchus for implantation into the curved bronchus.

[0102] Preferably, the proximal end of the elastic element 13 is fixedly connected to the distal end of the support rod 11, so that the elastic element 13 can be implanted into the bronchus through the support rod 11, which is simple to operate and convenient to use.

[0103] Preferably, the distal end of the elastic member 13 is fixedly connected to the clamping structure 2, for example, to the proximal end of the clamping structure 2, so as to facilitate the implantation of the clamping structure 2 into the bronchus.

[0104] Further preferably, the proximal end of the support rod 11 is provided with a handle 12, the handle 12 has a latching groove 121, and the proximal end of the support rod 11 is provided with a latching block 111, which is received within the latching groove 121, so as to achieve a stable connection between the support rod 11 and the handle 12, making it convenient for the operator to hold for surgical operations. Furthermore, the handle 12 is preferably made of rubber or silicone material.

[0105] It should be noted that the connecting part 413 is fixedly connected to the support rod 11, thereby fixing the positioning rod 41 to the support rod 11.

[0106] In one embodiment, the elastic element 13 is a spring, such as... Figures 1 to 6 As shown.

[0107] Preferably, the elastic element 13 is a spring, and the spring is preferably made of stainless steel, which not only improves the structural stability, but also makes it easy to bend, making it easier to insert into the curved bronchus, and prevents rusting to avoid affecting the patient's health.

[0108] It should be noted that the elastic element 13 can also be other elastic structures, and users can set it according to their needs. No specific limitations are made here.

[0109] In one embodiment, the distal end of the elastic member 13 includes a fixing portion 131 located radially outward, and the distal end of the bending wire 44 extends into the interior of the elastic member 13 and is wound around the fixing portion 131 for fixed connection thereto, such as... Figure 7 As shown.

[0110] Preferably, the fixing part 131 is located at the distal end of the elastic member 13 and on one side of the radial direction of the elastic member 13, so that the distal end of the elastic member 13 can be smoothly bent by pulling the fixing part 131.

[0111] More preferably, the fixing part 131 can be a portion of the spring wire of the elastic element 13, or it can be multiple parallel portions of the spring wire. It can be selected and configured as needed, and no specific limitation is made here. Figure 5 As shown.

[0112] More preferably, the distal end of the bending wire 44 is located inside the elastic member 13, thereby pulling the distal end of the elastic member 13 from inside the elastic member 13 to make it bend smoothly and reduce the impact on the bronchus.

[0113] Preferably, the distal end of the bending wire 44 passes through the gap of the fixing part 131 and wraps around the fixing part 131, and the distal end of the bending wire 44 is welded to achieve a stable connection between the bending wire 44 and the distal end of the elastic member 13, thereby realizing the function of smoothly bending the distal end of the elastic member 13.

[0114] In one embodiment, the distal end of the bending wire 44 extends into the interior of the elastic member 13 and passes through the gap at the distal end of the elastic member 13. The distal end of the bending wire 44 is provided with a fixing block 46. Axially, the fixing block 46 is larger than the maximum size of the gap to engage with the gap. Figure 8 As shown.

[0115] Preferably, when the elastic element 13 is stretched, the spacing between the spring wires increases, thereby creating a gap. The distal end of the bending wire 44 passes through the gap at the distal end of the elastic element 13, thereby connecting the bending wire 44 and the elastic element 13, which facilitates bending the distal end of the elastic element 13.

[0116] More preferably, the fixing block 46 is disposed on the radial outer side of the elastic member 13. The fixing block 46 can be a cuboid, a sphere, a cylinder, etc., and its specific shape can be set as needed, without being specifically limited here.

[0117] It should be noted that the fixing block 46 and the bending wire 44 can be separate structures, or they can be integrally formed, or the fixing block 46 can be hot-melted and formed at the far end of the bending wire 44. The forming method can be set as needed, and no specific limitation is made here.

[0118] Preferably, the distal end of the bending wire 44 passes radially through the gap of the elastic member 13 and is fixedly connected to the fixing block 46. The fixing block 46 abuts against the outer surface of the elastic member 13, thereby achieving a stable connection between the bending wire 44 and the distal end of the elastic member 13, which facilitates bending or releasing the distal end of the elastic member 13.

[0119] Preferably, in the axial direction of the elastic member 13, the size of the fixing block 46 is larger than the maximum size of the gap, so that the fixing block 46 can also be firmly abutted against the outer surface of the elastic member 13 when the elastic member 13 is stretched, preventing the fixing block 46 from passing through the gap and causing the distal end of the bending wire 44 to separate from the distal end of the elastic member 13, thus making it impossible to bend the distal end of the elastic member 13, and ensuring the normal operation of bending.

[0120] It should be noted that the maximum size of the above-mentioned gap is the size of the gap in the axial direction of the elastic element 13 when the elastic element 13 is stretched to its maximum size. This ensures that even when the elastic element 13 is stretched to its maximum length, the fixing block 46 is still firmly locked in the gap, ensuring a stable connection between the far end of the bending wire 44 and the far end of the elastic element 13.

[0121] In one embodiment, the distal end of the bending wire 44 extends into the interior of the elastic member 13 and is fixedly connected to the clamping structure 2, such as... Figure 13 As shown.

[0122] Preferably, the distal end of the bending wire 44 extends into the interior of the elastic member 13 and is fixedly connected to the clamping structure 2, thereby pulling the clamping structure 2 so that the distal end of the elastic member 13 bends when subjected to force, thus achieving the purpose of bending the distal end of the elastic member 13.

[0123] More preferably, the distal end of the bending wire 44 is fixedly connected to the proximal end of the clamping structure 2, thereby reducing the length of the bending wire 44, simplifying the structure, and reducing costs.

[0124] Preferably, the distal end of the bending wire 44 is located on one side of the inner radial direction of the elastic member 13, so that the distal end of the elastic member 13 can be bent smoothly, reducing the difficulty of bending and making it easier to control the direction of bending.

[0125] In one embodiment, the distal end of the support rod 11 is provided with a first cavity 114, the proximal end of the elastic element 13 is received within the first cavity 114 and fixedly connected to the support rod 11, the support rod 11 is provided with a second through hole 112, one end of the second through hole 112 communicates with the first through hole 4131 and the other end communicates with the first cavity 114, the bending wire 44 passes through the second through hole 4131 to extend into the interior of the first cavity 114 and the elastic element 13, such as... Figures 3 to 6 As shown.

[0126] Preferably, the first cavity 114 extends axially and is disposed at the distal end of the support rod 11. The first cavity 114 forms an opening (not shown) on the distal end face of the support rod 11 so that the proximal end of the elastic member 13 can be inserted to achieve a stable connection with the elastic member 13.

[0127] More preferably, the proximal end of the elastic member 13 is housed in the first cavity 114 and fixedly connected to the support rod 11, thereby firmly fixing the proximal end of the elastic member 13 to the support rod 11, preventing the elastic member 13 from tilting and ensuring the stability of the structure.

[0128] Preferably, the second through hole 112 penetrates the inner and outer surfaces of the support rod 11. One end of the second through hole 112 is connected to the first cavity 114, and the other end of the second through hole 112 is connected to the first through hole 4131, so as to realize the overall connection of the cavity 4111, the first through hole 4131, the second through hole 112 and the first cavity 114, which facilitates the passage of the bending wire 44.

[0129] It should be noted that the protrusion 45 is accommodated in the second through hole 112 so that the first through hole 4131 communicates with the second through hole 112.

[0130] Preferably, the bending wire 44 passes through the first through hole 4131, the second through hole 112, and the first cavity 114, thereby extending its proximal end into the cavity 4111 to be fixedly connected with the moving block 43, and extending its distal end into the elastic member 13 to be fixedly connected with the distal end of the elastic member 13 or the clamping structure 2, so that the bending wire 44 can be pulled or released by the movement of the moving block 43.

[0131] More preferably, the proximal end of the elastic member 13 is provided with a first limiting member 14, which is fixed within the first cavity 114. The first limiting member 14 has an inner cavity, and the proximal end of the elastic member 13 is received within the inner cavity and fixedly connected to the first limiting member 14, thereby achieving a fixed connection between the elastic member 13 and the support rod 11. Furthermore, the first limiting member 14 is preferably made of rubber or silicone material.

[0132] Furthermore, the bending wire 44 passes through the inner cavity of the first limiting member 14 so as to extend further into the interior of the elastic member 13.

[0133] In one embodiment, the pushing structure 3 includes a pushing rod 32 and a driving block 31 disposed near the proximal end of the pushing rod 32. The distal end of the pushing rod 32 is connected to the clamping structure 2. The support rod 11 has an elongated hole 113 communicating with the first cavity 114. The proximal end of the pushing rod 32 passes through the first cavity 114 and extends into the elongated hole 113. At least a portion of the driving block 31 extends into the elongated hole 113 and is fixedly connected to the proximal end of the pushing rod 32. Figures 1 to 13 As shown.

[0134] Preferably, the push rod 32 is elongated, with its proximal end housed within the first cavity 114, and its distal end extending into the elastic member 13 and reaching the distal end of the elastic member 13 to connect with the clamping structure 2, thereby driving the clamping structure 2 to open or close. Furthermore, the push rod 32 is preferably made of stainless steel.

[0135] It should be noted that the diameter of the spring wire of the elastic element 13 is less than 0.2 mm, the diameter of the push rod 32 is between 0.5 mm and 1 mm, and the distance between the inner wall of the elastic element 13 and the outer surface of the push rod 32 is greater than or equal to 0.025 mm, preferably greater than or equal to 0.2 mm and less than 1 mm. By limiting the above parameters, the spring wire and the push rod 32 will not interfere with each other, and the push rod 32 and the bending wire 44 will not affect or interact with each other during use.

[0136] More preferably, the distal end of the push rod 32 and the proximal end of the clamping structure 2 are rotatably connected by a connecting shaft, so that when the push rod 32 pushes the clamping structure 2 to the distal end, the clamping structure 2 opens, and when the push rod 32 pulls the clamping structure 2 to the proximal end, the clamping structure 2 closes, thus satisfying the purpose of driving the clamping structure 2 to open or close.

[0137] Preferably, the drive block 32 is disposed at the proximal end of the push rod 32 and fixedly connected to the push rod 32, thereby driving the push rod 32 to move towards the distal end or towards the proximal end via the drive block 32 at the proximal end, facilitating user operation. Furthermore, the drive block 32 is preferably made of rubber or silicone material.

[0138] Preferably, the support rod 11 has an elongated hole 113 at its near end, the elongated hole 113 penetrates the surface of the support rod 11 radially, and the elongated hole 113 extends along the length of the support rod 11.

[0139] More preferably, the distal end of the elongated hole 113 is connected to the proximal end of the first cavity 114, so that the proximal end of the push rod 32 passes through the first cavity 114 and extends into the elongated hole 113 to achieve a fixed connection with the drive block 31.

[0140] Furthermore, a portion of the drive block 31 extends into the elongated hole 113 to be fixedly connected to the proximal end of the push rod 32 within the elongated hole 113, thereby causing the push rod 32 to move along the elongated hole 113 as the drive block 31 moves, thus completing the driving action on the clamping structure 2.

[0141] Furthermore, the drive block 31 includes two drive parts that are interlocked with each other. The two drive parts are located on both sides of the support rod 11 in the radial direction. The two drive parts clamp the support rod 11 in the middle so that it can slide back and forth on the support rod 11 stably.

[0142] Furthermore, the drive block 31 has a third groove 311, and the push rod 32 has a second limiting member 33. The second limiting member 33 is received within the third groove 311 and has an inner cavity. The proximal end of the push rod 32 is received and fixed within the inner cavity of the second limiting member 33, thereby achieving a fixed connection between the push rod 32 and the drive block 31. Furthermore, the second limiting member 33 is preferably made of rubber or silicone material.

[0143] It should be noted that the second limiting member 33 and the inner wall of the third groove 311 are fitted with a gap, including gaps in the radial and axial directions, so that the second limiting member 33 can be movably accommodated in the third groove 311 and prevent the second limiting member 33 from disengaging from the third groove 311, thereby achieving a fixed connection between the second limiting member 33 and the driving block 31.

[0144] In one embodiment, the distal end of the push rod 32 is provided with a thinning portion 321, the thinning portion 321 being directly opposite the distal end of the elastic member 13, such as... Figure 13 As shown.

[0145] Preferably, the thinning portion 321 is disposed at the distal end of the push rod 32, so that when the bending wire 44 pulls the distal end of the elastic member 13 to bend and deform, the distal end of the push rod 32 can easily deform accordingly, reducing the difficulty of deforming the distal end of the push rod 32 and making the operation of bending the distal end of the elastic member 13 easier.

[0146] More preferably, the position of the thinned portion 321 is directly opposite the position of the distal end of the elastic member 13, so that the distal end of the push rod 32 can bend along with the bending of the distal end of the elastic member 13, reducing the difficulty of bending and ensuring the smooth bending process.

[0147] More preferably, the outer diameter of the thinned portion 321 is smaller than the outer diameter of the push rod 32 at both ends of the thinned portion 321, thereby making the thinned portion 321 more flexible. Preferably, the thinning thickness at the thinned portion 321 is 0.1 mm to 0.3 mm, thereby ensuring not only its flexibility but also its structural strength and preventing its breakage.

[0148] Preferably, the distance between the distal end of the thinning portion 321 and the proximal end of the clamping structure 2 can be set as needed, for example, preferably 2 mm, and the length of the thinning portion 321 is preferably 3 mm, which is more conducive to entering the bronchus or blood vessel with multiple bends or large bending angles.

[0149] In one embodiment, the spring spacing at the distal end of the elastic element 13 is between 0.3 mm and 0.5 mm.

[0150] Preferably, the spring spacing at the distal end of the elastic element 13 can be 0.3mm, 0.4mm, 0.5mm, etc., and the specific value can be set as needed, without being specifically limited here.

[0151] It should be noted that the above-mentioned limitation on the spring spacing at the far end of the elastic element 13 increases the spacing of the spring wires, reduces the constraint of the spring wires on the bending wire 44, makes it more flexible and easier to bend during bending, and thus can bend more easily along with the thinned part 321, reducing the difficulty of bending.

[0152] In one embodiment, the outer diameter of the distal end of the elastic member 13 is smaller than the outer diameter of the proximal end of the elastic member 13, and the distal end of the elastic member 13 wraps around the distal end of the push rod 32.

[0153] Preferably, the outer diameter of the distal end of the elastic element 13 is reduced to be smaller than that of the proximal end, thereby making its distal end more flexible and easier to bend, so as to accommodate the thinned portion 321 and make it easier to bend together with the thinned portion 321.

[0154] More preferably, the distal end of the elastic element 13 wraps around the distal end of the push rod 32, thereby minimizing the outer diameter of the elastic element 13. This not only ensures its structural strength but also provides better overall flexibility, making it easier to bend together.

[0155] In one embodiment, the clamping structure 2 includes a positioning frame 21 and clamping members disposed within the positioning frame 21. The positioning frame 21 includes a second cavity 212. Two clamping members are provided and arranged opposite to each other, and the two clamping members are housed within the second cavity 212. Each clamping member includes a clamping portion 24, a first rotating portion 23, and a second rotating portion 22. The distal end of the second rotating portion 23 is fixedly connected to the clamping portion 24. The proximal end of the second rotating portion 23 is rotatably connected to the distal end of the first rotating portion 22 via a connecting shaft. The middle portion of the second rotating portion 23 is rotatably connected to the positioning frame 21 via a connecting shaft. The proximal end of the first rotating portion 22 is rotatably connected to the distal end of the push rod 32 via a connecting shaft. Figure 13 As shown.

[0156] Preferably, the positioning frame 21 is U-shaped. In other embodiments, the positioning frame 21 may also be of other geometric shapes, which are not specifically limited here. The positioning frame 21 is preferably made of stainless steel. Furthermore, the distal end of the elastic member 13 is fixedly connected to the proximal end of the positioning frame 21, thereby achieving a stable connection between the main structure 1 and the clamping structure 2.

[0157] More preferably, the positioning frame 21 is provided with a second cavity 212, and the distal end of the push rod 32 extends into the second cavity 212 and can move back and forth within the second cavity 212 so as to connect with the clamping member.

[0158] Preferably, two clamping members are provided and arranged opposite each other, so that the implant can be clamped by the two clamping members to achieve the purpose of clamping the implant and implanting the implant into the bronchus. The clamping members are preferably made of stainless steel. Furthermore, the two clamping members are housed in the second cavity 212 and are respectively located at the two ends of the distal end of the push rod 32, so that the push rod 32 simultaneously drives the two clamping members to move relative to each other to achieve the purpose of clamping the implant.

[0159] Preferably, the clamping part 24 is located at the distal end of the positioning member 21 and at the farthest end of the biopsy forceps 100, so that the implant can be smoothly inserted into the bronchus after clamping the implant. Furthermore, the shape of the clamping part 24 can be set as needed, and is not specifically limited here.

[0160] It should be noted that: the clamping parts 24 of the two clamping members are arranged opposite each other, so when the push rod 32 pushes the two clamping members to the distal end, the clamping parts 24 of the two clamping members move away from each other to release the implant in the middle, at which time the clamping structure 2 is in the open state; while when the push rod 32 pulls the two clamping members to the proximal end, the clamping parts 24 of the two clamping members move closer to each other to clamp the implant in the middle, at which time the clamping state 2 is in the closed state.

[0161] More preferably, the proximal end of the first rotating part 22 and the distal end of the push rod 32 are rotatably connected via a connecting shaft, so that when the push rod 32 pushes the first rotating part 22 toward the distal end or pulls it toward the proximal end, the proximal end of the first rotating part 22 and the distal end of the push rod 32 rotate relative to each other. Furthermore, the distal end of the push rod 32 is provided with a sixth through hole 322, and the proximal end of the first rotating part 22 is provided with a fourth through hole 221. The sixth through hole 322 and the fourth through hole 221 are opposite to each other and communicate with each other, so that the connecting shaft can pass through to achieve a rotatable connection between the two.

[0162] Furthermore, the distal end of the first rotating part 22 and the proximal end of the second rotating part 23 are rotatably connected by a connecting shaft, so that when the push rod 32 drives the first rotating part 22 to rotate, the distal end of the first rotating part 22 and the proximal end of the second rotating part 23 rotate relative to each other.

[0163] Furthermore, the distal end of the second rotating part 23 is fixedly connected to the clamping part 24, thereby causing the two clamping parts 24 to move closer or further apart. Further, the middle part of the second rotating part 23 is rotatably connected to the positioning frame 21 via a connecting shaft. The middle part of the second rotating part 23 is provided with a fifth through hole 241, and the positioning frame 21 is provided with a third through hole 211. The third through hole 211 and the fifth through hole 241 are opposite to and communicate with each other, so that the connecting shaft can pass through to achieve a rotatable connection between the two.

[0164] It should be noted that the above structure enables the push rod 32 to move towards the proximal end, causing the first rotating part 22 to rotate relative to it, which in turn causes the second rotating part 23 to rotate around the connecting shaft inside the fifth through hole 241, thereby bringing the clamping parts 24 of the two clamping members closer together to clamp the implant and achieve the purpose of clamping.

Claims

1. A biopsy forceps, characterized in that, The device includes a main structure, a clamping structure disposed at the distal end of the main structure, a pushing structure disposed on the main structure, and a bending structure. The distal end of the pushing structure is connected to the clamping structure to put it in an open or closed state. The bending structure includes a bending wire, a rotating frame, a positioning rod housed in the rotating frame, and a moving block. The distal end of the bending wire is fixedly connected to the clamping structure or the distal end of the main structure, and the proximal end of the bending wire is fixedly connected to the moving block. One end of the positioning rod is connected to the main structure, and the positioning rod has a cavity for housing the moving block. The moving block is threadedly connected to the rotating frame so that by rotating the rotating frame, the moving block is driven to move in a predetermined direction within the cavity to pull or release the bending wire, thereby causing the distal end of the main structure or the clamping structure to bend.

2. The biopsy forceps according to claim 1, characterized in that, The positioning rod includes a positioning part and a connecting part disposed at one end of the positioning part and connected to the main structure. The cavity is disposed in the positioning part, and the connecting part is provided with a first through hole communicating with the cavity. The bending wire passes through the first through hole.

3. The biopsy forceps according to claim 2, characterized in that, The positioning rod also includes a limiting part disposed at the other end of the positioning part, and the rotating frame is located between the limiting part and the connecting part.

4. The biopsy forceps according to claim 1, characterized in that, The proximal end of the bending wire passes through the moving block along the predetermined direction, and an abutment block is fixed to the proximal end of the bending wire, the abutment block abutting against the moving block.

5. The biopsy forceps according to claim 4, characterized in that, The movable block is provided with a first groove, and the abutting block is received in the first groove.

6. The biopsy forceps according to claim 5, characterized in that, The movable block is provided with a second groove, which communicates with the first groove. A support block is provided in the second groove, and the support block is provided with a through hole. The proximal end of the bending wire passes through the through hole and extends into the first groove.

7. The biopsy forceps according to claim 2, characterized in that, The main structure includes a support rod and an elastic element disposed at the distal end of the support rod. The proximal end of the elastic element is fixedly connected to the distal end of the support rod, and the distal end of the elastic element is fixedly connected to the clamping structure, wherein: The distal end of the elastic element includes a fixing portion located radially outward, and the distal end of the bending wire extends into the interior of the elastic element and is wound and fixed to the fixing portion; or, The distal end of the bending wire extends into the interior of the elastic element and passes through the gap at the distal end of the elastic element. A fixing block is provided at the distal end of the bending wire. Axially, the size of the fixing block is larger than the maximum size of the gap to engage with the gap; or... The distal end of the bending wire extends into the interior of the elastic element and is fixedly connected to the clamping structure.

8. The biopsy forceps according to claim 7, characterized in that, The support rod has a first cavity at its distal end, the elastic element is housed in the first cavity and fixedly connected to the support rod, the support rod has a second through hole, one end of the second through hole is connected to the first through hole and the other end is connected to the first cavity, and the bending wire passes through the second through hole to extend into the interior of the first cavity and the elastic element.

9. The biopsy forceps according to claim 8, characterized in that, The pushing structure includes a pushing rod and a driving block disposed at the proximal end of the pushing rod. The distal end of the pushing rod is connected to the clamping structure. The support rod has an elongated hole that communicates with the first cavity. The proximal end of the pushing rod passes through the first cavity and extends into the elongated hole. At least a portion of the driving block extends into the elongated hole and is fixedly connected to the proximal end of the pushing rod.

10. The biopsy forceps according to claim 9, characterized in that, The distal end of the push rod is provided with a thinning portion, which is directly opposite the distal end of the elastic element.

11. The biopsy forceps according to claim 10, characterized in that, The spring spacing at the distal end of the elastic element is between 0.3 mm and 0.5 mm; and / or, The outer diameter of the distal end of the elastic element is smaller than the outer diameter of the proximal end of the elastic element, and the distal end of the elastic element wraps around the distal end of the push rod.

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