Jaw mechanism, jaw closure and release mechanism, and hemostatic clip

Abstract

The present disclosure relates to the technical field of hemostatic clips, and particularly to a jaw mechanism, a jaw closure and release mechanism, and a hemostatic clip. The jaw mechanism in the present disclosure comprises: a connecting base, which is provided with a guide hole; connecting pieces; a push-pull rod; and clip pieces, which are in transmission connection with the push-pull rod by means of the connecting pieces, wherein the guide hole is tapered, and the tapered guide hole gradually converges from the side close to the clip pieces to the opposite side so as to form a guide slope abutting against the connecting pieces or the push-pull rod. The present disclosure targets at the technical problem of the defects of existing hemostatic clips, and implements the closure and opening of the clip pieces by means of improving the way in which the clip pieces are driven and using the push-pull rod and the connecting pieces to push the clip pieces. Obviously, the combination of the push-pull rod and the connecting pieces is more rigid than traditional steel wires, such that the clip pieces can push human tissue away as much as possible when encountering an obstruction. In addition, no foreign matter such as debris is generated upon release of the jaw assembly, ensuring no extra trouble is caused to medical staff and patients.

Description

Clamping mechanism, clamping and releasing mechanism and hemostatic clamp Technical Field

[0001] This disclosure relates to the field of hemostatic clip technology, specifically to clip mechanisms, clamping mechanisms, and hemostatic clips. Background Technology

[0002] With the development of endoscopic technology and other related technologies, endoscopic hemostasis has become the preferred treatment method for gastrointestinal bleeding. Commonly used endoscopic hemostasis methods include laser coagulation, electrocoagulation, local injection of hemostatic agents, drug spraying, and suture clipping. Among these, suture clipping has become the most effective and clinically valuable non-surgical treatment for gastrointestinal bleeding due to its minimal invasiveness, rapid hemostasis, low rebleeding rate, few complications, and definite efficacy.

[0003] Currently, the hemostatic clips available on the market are mainly divided into two types: sliding type and spring type. Both types of hemostatic clips consist of a clamp tube, a clamp plate, and a stop pin. When performing surgical procedures using the clamping method, it is necessary to ensure that the clamp head remains clamped to the diseased tissue. That is, certain measures need to be taken to lock the clamp head to keep it in a clamped state, and then the clamp head is detached from the rest of the parts so that the clamp head can remain in the body to continue to clamp the diseased tissue and achieve hemostasis.

[0004] However, existing hemostatic clips have different locking methods, which may result in defects such as insecure locking or inconvenient locking operation, leading to poor clamping effect or difficulty in locking the clip.

[0005] The opening and closing of some clamps is generally achieved directly through the pushing and pulling action of the wire rope. However, the wire rope has a certain degree of flexibility. If the clamp is obstructed by human tissue during the opening process, the deformation of the wire rope itself will prevent the clamp from opening properly. In other words, the pushing force provided by the wire rope is insufficient to overcome the obstruction force of the human tissue on the clamp, and the pushing force will only be converted into the flexible deformation of the wire rope itself. Understandably, the pushing and pulling action of the wire rope on the clamp is limited by the rigidity of the wire rope itself. The structure of the wire rope directly connecting the clamp has insufficient strength, which leads to the clamp failing to open properly under certain circumstances.

[0006] Furthermore, existing clamping methods require the clamp head to be detached from the rest of the clamp during operation so that the clamp head can remain in the body to maintain the clamping state on the diseased tissue. However, when releasing the clamp head, existing hemostatic clamps inevitably produce debris and other foreign objects. The generation and removal of foreign objects will cause trouble and additional workload for medical staff, and at the same time leave potential risks to patients. Summary of the Invention

[0007] To address the technical problems of existing hemostatic clips, this disclosure provides a clamping mechanism and a hemostatic clip. It features a protrusion at the tail of the clip and a locking platform along the protrusion's movement path. The locking platform limits the protrusion's position, thus locking the clip in the closed state. This method is simple to operate, provides excellent clamping effect, does not generate foreign objects, and does not cause inconvenience to patients or medical staff.

[0008] The technical solution provided in this disclosure is as follows: a clamping mechanism, including a connecting seat, a push-pull rod, two connecting pieces, and two clamping pieces; the two clamping pieces intersect and are hinged to the connecting seat at the intersection; the push-pull rod is detachably connected to the two clamping pieces respectively through the two connecting pieces; each clamping piece includes a clamping arm, a clamping tooth is fixedly provided on the clamping arm, a clamping boss is fixedly provided at the end of the clamping arm, and the clamping arm is inclined towards the side where the clamping tooth is located; a snap-fit ​​member is provided on the clamping piece, and a locking part for restricting the movement of the snap-fit ​​member is provided on the connecting seat; the two locking parts corresponding to the two clamping pieces are centrally symmetrically arranged on the connecting seat; the locking part includes a guide groove and a locking groove, which are separated by a locking platform; the side of the locking platform facing the guide groove is the release side, and the side of the locking platform facing the locking groove is the locking side; the snap-fit ​​member is used to abut against the release side and the locking side.

[0009] Optionally, the snap-fit ​​component is a three-dimensional boss, and the three-dimensional boss is provided with a guide surface, which is used to abut against the locking platform.

[0010] Optionally, the width of the guide groove is not equal to the width of the locking groove.

[0011] Optionally, one of the connected clips and the connecting piece is provided with a first connecting shaft, and the other is provided with a first connecting hole, the first connecting shaft being rotatably engaged with the first connecting hole; one of the connected connecting piece and the push-pull rod is provided with a second connecting shaft, and the other is provided with a second connecting hole, the second connecting shaft being rotatably engaged with the second connecting hole; a disengagement groove communicating with the outside is provided on the first connecting hole or the second connecting hole, the through size of the disengagement groove being smaller than the diameter of the corresponding first connecting shaft or the second connecting shaft.

[0012] Optionally, the connecting seat is provided with a guide hole, and the two clamping pieces are respectively connected to the push-pull rod through two connecting pieces passing through the guide hole; the guide hole is tapered, and the tapered guide hole gradually converges from the side near the clamping piece to the other side to form a guide slope, and the guide slope is used to abut against the connecting piece or the push-pull rod.

[0013] Optionally, the tilt angle A of the clamping arm is 0° to 30°.

[0014] Optionally, the clamping bosses located on the two clamping arms are staggered.

[0015] Optionally, the clip, connector, and connector are made of non-magnetic elastic material or non-magnetic absorbable material.

[0016] A hemostatic clip includes the aforementioned clamping mechanism, and further includes a rotating base, a first rotating ring, a second rotating ring, and a hook. The rotating base is located on one side of the connecting base, and a limiting platform is fixedly provided on the rotating base. The first rotating ring is located inside the rotating base, and both ends of the first rotating ring abut against the limiting platform. The outer wall of the second rotating ring is fixedly connected to the inner wall of the first rotating ring, and an extension boss is fixedly provided on the second rotating ring. A first release hole is provided on the extension boss, and a second release hole is provided on the connecting base. A hook is fixedly provided at the end of the hook, and the hook passes through the first release hole and inserts into the second release hole.

[0017] Optionally, it also includes a handle, a sliding handle, a rotating wheel, a plastic-coated spring tube, and a spindle; the end of the handle is provided with a finger ring, and the hook is also provided with a through hole; the plastic-coated spring tube is sleeved on the outside of the spindle, one end of the plastic-coated spring tube is fixedly connected to the end of the handle, and the other end of the plastic-coated spring tube is fixedly connected to the rotating ring seat; the sliding handle is slidably disposed on the handle; one end of the spindle is fixedly connected to the sliding handle through a fixing tube, and the other end of the spindle passes through the through hole and is fixedly connected to the push-pull rod; the rotating wheel is rotatably connected to the handle, and a flat part is provided inside the rotating wheel; the spindle passes through the flat part and is engaged with the flat part through a guide tube.

[0018] To address the technical problems of existing hemostatic clips, this disclosure also provides a clamp assembly, a clamping and releasing mechanism, and a hemostatic clip. It improves the driving method of the clamp pieces by using a push-pull rod and a connecting plate to push the clamp pieces, thereby achieving the closing and opening of the clamp pieces. Clearly, the combination of the push-pull rod and the connecting plate is more rigid than traditional steel wire ropes, enabling the clamp pieces to push away human tissue as much as possible when obstructed. Furthermore, when the clamp assembly is released, no debris or other foreign objects are generated, causing no additional inconvenience to medical staff and patients.

[0019] The technical solution provided in this disclosure is as follows: a clamp assembly, including a connecting seat, a push-pull rod, two connecting pieces, and two clamping pieces; the two clamping pieces intersect and are hinged to the connecting seat, and the two clamping pieces are respectively connected to the push-pull rod through the two connecting pieces; one of the connected clamping pieces and the connecting pieces is provided with a first connecting shaft, and the other is provided with a first connecting hole, the first connecting shaft being rotatably engaged with the first connecting hole; one of the connected connecting pieces and the push-pull rod is provided with a second connecting shaft, and the other is provided with a second connecting hole, the second connecting shaft being rotatably engaged with the second connecting hole; a release groove communicating with the outside is provided on the first connecting hole or the second connecting hole, the through size of the release groove being smaller than the diameter of the corresponding first connecting shaft or the second connecting shaft.

[0020] Optionally, the clamping piece is provided with a snap-fit ​​element, and the connecting seat is provided with a locking part for restricting the movement of the snap-fit ​​element. The two locking parts corresponding to the two clamping pieces are centrally symmetrically arranged on the connecting seat. The locking part includes a guide groove and a locking groove, which are separated by a locking platform. The side of the locking platform facing the guide groove is the release side, and the side of the locking platform facing the locking groove is the locking side. The snap-fit ​​element is used to abut against the release side and the locking side.

[0021] Optionally, the width of the guide groove is not equal to the width of the locking groove.

[0022] Optionally, the latching member is a three-dimensional boss, and the three-dimensional boss is provided with a guide surface, which is used to abut against the release side of the locking platform.

[0023] Optionally, the connecting seat is provided with a guide hole, and the two clamping pieces are respectively connected to the push-pull rod through two connecting pieces passing through the guide hole; the guide hole is tapered, and the tapered guide hole gradually converges from one end near the clamping piece to the other end so that the inner wall of the guide hole forms a guide slope, and the guide slope is used to abut against the connecting piece or the push-pull rod.

[0024] Optionally, the clip includes a clamping arm, wherein the head end of the clamping arm (35) on any one of the clips (3) is inclined toward the side where the clamping arm (35) is located on the other clip (3).

[0025] Optionally, the tilt angle A of the clamping arm is 0° to 30°.

[0026] Optionally, the clip, connector, and connector are made of non-magnetic elastic material or non-magnetic absorbable material.

[0027] A clamping and releasing mechanism includes the aforementioned clamping assembly, and further includes a rotating ring seat, a first rotating ring, a second rotating ring, and a hook. The rotating ring seat is located on one side of the connecting seat, and a limiting platform is fixedly provided on the rotating ring seat. The first rotating ring is located inside the rotating ring seat, and both ends of the first rotating ring abut against the limiting platform. The outer wall of the second rotating ring is fixedly connected to the inner wall of the first rotating ring, and an extension boss is fixedly provided on the second rotating ring. A first release hole is provided on the extension boss, and a second release hole is provided on the connecting seat. A hook is fixedly provided at the end of the hook, and the hook passes through the first release hole and inserts into the second release hole.

[0028] A hemostatic clip includes the aforementioned clamping and releasing mechanism, and further includes a handle, a sliding handle, a rotating wheel, a plastic-coated spring tube, and a mandrel; the end of the handle is provided with a finger ring, and the hook is also provided with a through hole; the plastic-coated spring tube is sleeved on the outside of the mandrel, one end of the plastic-coated spring tube is fixedly connected to the end of the handle, and the other end of the plastic-coated spring tube is fixedly connected to the rotating ring seat; the sliding handle is slidably disposed on the handle; one end of the mandrel is fixedly connected to the sliding handle through a fixing tube, and the other end of the mandrel passes through the through hole and is fixedly connected to the push-pull rod; the rotating wheel is rotatably connected to the handle, and a flat part is provided inside the rotating wheel; the mandrel passes through the flat part and is engaged with the flat part through a conduit.

[0029] To address the technical problems of existing hemostatic clips, this disclosure further provides a hemostatic clip that utilizes a deformation hole and a connecting through hole to connect with a ball head at the end of a metal wire, forming a relatively simple detachable mechanism that combines clamping and detachment control of the clip. Simultaneously, the snap-fit ​​element on the clip and the limiting boss on the connecting seat also constitute a relatively simple clip locking mechanism, allowing the clip to be easily locked after closure.

[0030] The technical solution provided in this disclosure is as follows: a hemostatic clip, comprising a connecting seat, a metal wire, and two clips; the two clips intersect and are hinged to the connecting seat at the intersection; each clip has a deformation hole and a connecting through hole at its tail, the deformation hole and the connecting through hole communicating to form a three-way integral hole, so that the tail of the clip forms a first deformation wall and a second deformation wall; the connecting seat has a guide hole, the metal wire includes a first segment and a second segment, both of which pass through the guide hole, and each of the first segment and the second segment has a ball head fixedly provided at its end; the diameter of the ball head is larger than the through-hole size, and the diameter of the ball head is smaller than the through-hole size. The dimensions of the deformation hole; the first segment and the second segment respectively penetrate the connecting through holes on the two clamping pieces, and the ball head is located inside the deformation hole; a snap-fit ​​member is provided on the clamping piece near the deformation hole, and a locking part is provided on the connecting seat to restrict the movement of the snap-fit ​​member. The two locking parts corresponding to the two clamping pieces are centrally symmetrically arranged on the connecting seat; the locking part includes a release groove and a locking groove, which are separated by a limiting boss. The side of the limiting boss facing the release groove is the non-limiting side, and the side of the limiting boss facing the locking groove is the limiting side. The snap-fit ​​member is used to abut against the non-limiting side and the limiting side.

[0031] Optionally, the clip includes a clamping arm, wherein for any one of the clips, the head end of the clamping arm is tilted toward the side where the clamping arm is located on the other clip.

[0032] Optionally, the diameter of the guide hole is greater than or equal to the sum of the diameters of the ball heads.

[0033] Optionally, there is a length difference ΔL between the first segment and the second segment, wherein ΔL is greater than or equal to the diameter of the ball head.

[0034] Optionally, the distance between the deformation hole on one of the clips and the intersection of the clips is c1, and the distance between the deformation hole on the other clip and the intersection of the two clips is c2, satisfying c1≠c2.

[0035] Optionally, the movement path of the latching member within the release groove is projected onto the plane of the release groove to form region P1. Region P1 forms boundaries M1 and M2 along the axial direction of the connecting seat. The distance between boundaries M1 and M2 is dm1, and the width of the release groove is d1, satisfying d1≥dm1. The movement path of the latching member within the locking groove is projected onto the plane of the locking groove to form region P2. Region P2 forms boundaries M3 and M4 along the axial direction of the connecting seat. The distance between boundaries M3 and M4 is dm2, and the width of the locking groove is d2, satisfying d2≤dm2.

[0036] Optionally, the snap-fit ​​component is a three-dimensional boss, and the three-dimensional boss is provided with a guide surface, which is used to abut against the non-restricting side of the limiting boss.

[0037] Optionally, the connecting seat and the clamp are made of non-magnetic elastic material or non-magnetic absorbable material.

[0038] Optionally, it further includes a swivel seat, a first swivel, a second swivel, and a hook; the swivel seat is located on one side of the connecting seat, and a limit block is fixedly provided on the swivel seat; the first swivel is located inside the swivel seat, and both ends of the first swivel abut against the limit block respectively; the outer wall of the second swivel is fixedly connected to the inner wall of the first swivel, an extension boss is fixedly provided on the second swivel, a first release hole is provided on the extension boss, a second release hole is provided on the connecting seat, and a hook is fixedly provided at the end of the hook, the hook passing through the first release hole and inserting into the second release hole.

[0039] Optionally, it also includes a handle, a sliding handle, a rotating wheel, and a spindle; the end of the handle is provided with a finger ring, and the hook is provided with a through hole; the sliding handle is slidably disposed on the handle, one end of the spindle is fixedly connected to the sliding handle through a fixing tube, and the other end of the spindle passes through the through hole and is fixedly connected to the metal wire through a connecting tube; the rotating wheel is rotatably connected to the handle, and a flat part is provided inside the rotating wheel, through which the spindle passes and is engaged with the flat part through a guide tube.

[0040] Furthermore, the technical solution provided in this disclosure is: a clamping mechanism, comprising: a connecting seat, wherein the connecting seat is provided with a guide hole; a connecting piece; a push-pull rod; and a clamping piece, wherein the connecting piece is connected to the push-pull rod in a transmission manner, wherein the guide hole is tapered, and the tapered guide hole gradually converges from one side near the clamping piece to the other side to form a guide slope that abuts against the connecting piece or the push-pull rod.

[0041] Optionally, one of the clamping piece and the connecting piece is provided with a first connecting shaft, and the other is provided with a first connecting hole; one of the connecting piece and the push-pull rod is provided with a second connecting shaft, and the other is provided with a second connecting hole; the first connecting hole or the second connecting hole is provided with a disengagement groove, and the through size of the disengagement groove is smaller than the diameter of the corresponding first connecting shaft or the second connecting shaft.

[0042] Optionally, the clamping piece includes a clamping arm, on which clamping teeth are fixedly provided, and the clamping arm is inclined toward the side where the clamping teeth are located.

[0043] Optionally, the clamping mechanism includes two intersecting clamping plates, each clamping plate including a clamping arm, the head end of the clamping arm being inclined toward the other clamping plate.

[0044] Optionally, the tilt angle of the clamping arm is 0° to 30°.

[0045] Optionally, the clamping mechanism includes two intersecting clamping plates, and each clamping plate has a clamping boss fixedly provided at the head end of its clamping arm. The clamping boss is staggered with the clamping boss of the other clamping plate's clamping arm.

[0046] Optionally, the clips, connecting pieces, and / or connecting seats are made of non-magnetic elastic materials or non-magnetic absorbable materials.

[0047] A clamping and releasing mechanism includes the clamping mechanism described above. Optionally, the clamping and releasing mechanism further includes: a rotating ring seat located on one side of the connecting seat, with a limiting block fixedly disposed on the rotating ring seat; a first rotating ring located inside the rotating ring seat, with both ends of the first rotating ring abutting against the limiting block; a second rotating ring, with its outer wall fixedly connected to the inner wall of the first rotating ring, and an extending boss fixedly disposed on the second rotating ring; and a hook, with a hanging claw fixedly disposed at its end, wherein a first release hole is disposed on the extending boss, a second release hole is disposed on the base, and the hanging claw passes through the first release hole and inserts into the second release hole.

[0048] A hemostatic clip includes the aforementioned clamping and releasing mechanism. Optionally, the hemostatic clip further includes: a handle with a finger ring at one end; a sliding handle slidably mounted on the handle; a rotating wheel rotatably connected to the handle; a mandrel, one end of which is fixedly connected to the sliding handle via a fixing tube, and the other end of which passes through a through hole in the hook and is fixedly connected to the transmission rod; and a spring tube sleeved on the outside of the mandrel, one end of which is fixedly connected to the end of the handle, and the other end of which is fixedly connected to the rotating ring seat, wherein the rotating wheel has a flat section, and the mandrel passes through the flat section and is engaged with the flat section via a conduit. Beneficial effects

[0049] Compared with existing technologies, the technical solution provided in this disclosure has the following advantages: Addressing the technical problems of defects in existing hemostatic clips, this disclosure provides a protrusion at the tail of the clip and a locking platform along the movement path of the protrusion. The locking platform's limiting effect on the protrusion locks the clip in the closed state. This method is simple to operate, provides good clamping effect, does not generate additional foreign objects, and does not cause inconvenience to patients and medical staff.

[0050] Compared with existing technologies, the technical solutions provided in this disclosure offer the following advantages: Addressing the shortcomings of existing hemostatic clips, this disclosure improves the clip's driving mechanism by using a push-pull rod and connecting plate to push the clip, thereby achieving its opening and closing. Clearly, the combination of the push-pull rod and connecting plate provides greater rigidity than traditional steel wire ropes, enabling the clip to push away human tissue as much as possible when obstructed. Furthermore, when the clip assembly is released, no debris or other foreign matter is generated, minimizing inconvenience to medical personnel and patients.

[0051] Furthermore, compared with the prior art, the technical solution provided in this disclosure has the following beneficial effects: Addressing the technical problems of defects in existing hemostatic clips, this disclosure proposes a hemostatic clip that utilizes deformation holes and connecting through holes to connect with the ball head at the end of the metal wire, forming a relatively simple detachable mechanism that combines clamping and detachment control of the clip. Simultaneously, the snap-fit ​​element on the clip and the limiting boss on the connecting seat also constitute a relatively simple clip locking mechanism, allowing the clip to be easily locked after closure. In summary, the hemostatic clip proposed in this disclosure has a simple structural design, low manufacturing cost, and does not produce additional parts or debris during the clip locking stage, fully meeting the requirements of the clamping method operation and ensuring no foreign objects are generated during the operation. Attached Figure Description

[0052] Figure 1 is one of the structural schematic diagrams of the clamping mechanism proposed in Embodiment 1 of this disclosure.

[0053] Figure 2 is a second schematic diagram of the chuck mechanism proposed in Embodiment 1 of this disclosure.

[0054] Figure 3 is a third schematic diagram of the chuck mechanism proposed in Embodiment 1 of this disclosure.

[0055] Figure 4 is an enlarged view of point A in Figure 3.

[0056] Figure 5 is a schematic diagram of the connecting seat proposed in Embodiment 1 of this disclosure.

[0057] Figure 6 is a cross-sectional schematic diagram of the connector proposed in Embodiment 1 of this disclosure.

[0058] Figure 7 is one of the structural schematic diagrams of the clip proposed in Embodiment 1 of this disclosure.

[0059] Figure 8 is a second schematic diagram of the clip structure proposed in Embodiment 1 of this disclosure.

[0060] Figure 9 is a third schematic diagram of the clip structure proposed in Embodiment 1 of this disclosure.

[0061] Figure 10 is an enlarged schematic diagram of point B in Figure 9.

[0062] Figure 11 is one of the structural schematic diagrams of the connecting piece proposed in Embodiment 1 of this disclosure.

[0063] Figure 12 is a second schematic diagram of the connecting piece proposed in Embodiment 1 of this disclosure.

[0064] Figure 13 is one of the structural schematic diagrams of the push-pull rod proposed in Embodiment 1 of this disclosure.

[0065] Figure 14 is a second schematic diagram of the push-pull rod structure proposed in Embodiment 1 of this disclosure.

[0066] Figure 15 is one of the schematic diagrams of the clamp engagement proposed in Embodiment 1 of this disclosure.

[0067] Figure 16 is a second schematic diagram of the clamping action proposed in Embodiment 1 of this disclosure.

[0068] Figure 17 is one of the structural schematic diagrams of the clamp assembly proposed in Embodiment 2 of this disclosure.

[0069] Figure 18 is a second schematic diagram of the chuck assembly proposed in the two embodiments of this disclosure.

[0070] Figure 19 is a third schematic diagram of the chuck assembly proposed in Embodiment 2 of this disclosure.

[0071] Figure 20 is an enlarged schematic diagram of point A in Figure 19.

[0072] Figure 21 is a schematic diagram of the structure of the connector proposed in Embodiment 2 of this disclosure.

[0073] Figure 22 is a cross-sectional schematic diagram of the connector proposed in Embodiment 2 of this disclosure.

[0074] Figure 23 is one of the structural schematic diagrams of the clip proposed in Embodiment 2 of this disclosure.

[0075] Figure 24 is a second schematic diagram of the clip structure proposed in Embodiment 2 of this disclosure.

[0076] Figure 25 is a third schematic diagram of the clip structure proposed in Embodiment 2 of this disclosure.

[0077] Figure 26 is an enlarged schematic diagram of point B in Figure 25.

[0078] Figure 27 is one of the structural schematic diagrams of the connecting piece proposed in the two embodiments of this disclosure.

[0079] Figure 28 is a second schematic diagram of the connecting piece proposed in the two embodiments of this disclosure.

[0080] Figure 29 is one of the structural schematic diagrams of the push-pull rod proposed in the two embodiments of this disclosure.

[0081] Figure 30 is a second schematic diagram of the push-pull rod structure proposed in the two embodiments of this disclosure.

[0082] Figure 31 is a schematic diagram of the structure of the first rotating ring proposed in Embodiment 3 of this disclosure.

[0083] Figure 32 is a schematic diagram of the structure of the second rotating ring proposed in Embodiment 3 of this disclosure.

[0084] Figure 33 is a schematic diagram of the hook structure proposed in Embodiment 3 of this disclosure.

[0085] Figure 34 is a schematic diagram of the hemostatic clip proposed in Embodiment 4 of this disclosure.

[0086] Figure 35 is one of the working schematic diagrams of the hemostatic clip proposed in Embodiment 4 of this disclosure.

[0087] Figure 36 is a second schematic diagram of the working of the hemostatic clip proposed in Embodiment 4 of this disclosure.

[0088] Figure 37 is a schematic diagram of another clamping mechanism proposed in Embodiment 5 of this disclosure.

[0089] Figure 38 is a second schematic diagram of another clamping mechanism proposed in the five embodiments of this disclosure.

[0090] Figure 39 is a schematic diagram of another clamping mechanism proposed in the five embodiments of this disclosure.

[0091] Figure 40 is a fourth structural schematic diagram of another clamping mechanism proposed in Embodiment 5 of this disclosure.

[0092] Figure 41 is a fifth schematic diagram of another clamping mechanism proposed in Embodiment 5 of this disclosure.

[0093] Figure 42 is an enlarged schematic diagram of point A in Figure 41.

[0094] Figure 43 is a schematic diagram of the connecting seat proposed in Embodiment 5 of this disclosure.

[0095] Figure 44 is a cross-sectional schematic diagram of the connector proposed in Embodiment 5 of this disclosure.

[0096] Figure 45 is one of the structural schematic diagrams of the clip proposed in Embodiment 5 of this disclosure.

[0097] Figure 46 is a second schematic diagram of the clip structure proposed in Embodiment 5 of this disclosure.

[0098] Figure 47 is a third schematic diagram of the clip structure proposed in Embodiment 5 of this disclosure.

[0099] Figure 48 is a fourth schematic diagram of the clip structure proposed in Embodiment 5 of this disclosure.

[0100] Figure 49 is an enlarged view of point B in Figure 48.

[0101] Figure 50 is a schematic diagram of the structure of the first rotating ring proposed in Embodiment 6 of this disclosure.

[0102] Figure 51 is a schematic diagram of the structure of the second rotating ring proposed in Embodiment 6 of this disclosure.

[0103] Figure 52 is a schematic diagram of the hook structure proposed in Embodiment 6 of this disclosure.

[0104] Figure 53 is a schematic diagram of the overall structure of the hemostatic clip proposed in Embodiment 6 of this disclosure.

[0105] Figure 54 is one of the working schematic diagrams of the hemostatic clip proposed in Embodiment 6 of this disclosure.

[0106] Figure 55 is a second schematic diagram of the working of the hemostatic clip proposed in Embodiment 6 of this disclosure. Detailed Implementation

[0107] To further understand the contents of this disclosure, a detailed description of this disclosure will be provided in conjunction with the accompanying drawings and embodiments.

[0108] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely for explaining the relevant disclosure and not for limiting the disclosure. Furthermore, it should be noted that, for ease of description, only the parts related to the disclosure are shown in the accompanying drawings. The terms "first," "second," etc., used in this disclosure are for the convenience of describing the technical solutions of this disclosure and have no specific limiting effect; they are all general terms and do not constitute a limitation on the technical solutions of this disclosure. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict, all of which are within the scope of protection claimed in this disclosure.

[0109] Example 1

[0110] Referring to Figures 1 to 14, this embodiment proposes a clamping mechanism, including a connecting seat (or base) 1, a push-pull rod 2, two connecting pieces 9, and two clamping pieces 3. The two clamping pieces 3 intersect and are hinged to the connecting seat 1 at the intersection. The push-pull rod 2 is detachably connected to the two clamping pieces 3 via the two connecting pieces 9. The clamping piece 3 includes a clamping arm 35, on which a clamping tooth 36 is fixedly provided. A clamping boss 37 is fixedly provided at the end of the clamping arm 35, and the clamping arm 35 is inclined towards the side where the clamping tooth 36 is located.

[0111] The clamping piece 3 is provided with a snap-fit ​​element 33, and the connecting seat 1 is provided with a locking part for restricting the movement of the snap-fit ​​element 33. The two locking parts corresponding to the two clamping pieces 3 are centrally symmetrically arranged on the connecting seat 1. The locking part includes a guide groove 14 and a locking groove 13, which are separated by a locking platform 10. The side of the locking platform 10 facing the guide groove 14 is the release side 101, and the side of the locking platform 10 facing the locking groove 13 is the locking side 102. The snap-fit ​​element 33 is used to abut against the release side 101 and the locking side 102.

[0112] The clamping mechanism in this embodiment is part of the hemostatic clamp assembly. It is connected to the push-pull rod 2 by a traction mechanism composed of components such as steel wire rope in the hemostatic clamp. The push-pull rod 2 is detachably connected to the clamping plate 3 through two connecting pieces 9. When the push-pull rod 2 is pushed or pulled, it can drive the clamping plate 3 to swing, thereby realizing the clamping and opening of the clamping plate 3.

[0113] After the clamping mechanism completes the clamping of the lesion, it needs to maintain the clamped state, that is, it needs to lock the clamping mechanism in the clamped state. The specific working principle is as follows: the locking member 33 swings with the swing of the clamping piece 3. When the clamping piece 3 has not passed the locking platform 10, its movement stroke ends when the locking member 33 abuts against the release side 101 of the locking platform 10. That is, the locking member 33 on the clamping piece 3 can freely slide into the guide groove 14 or freely slide out of the guide groove 14. At this time, the clamping piece 3 is not locked.

[0114] When clip 3 is fully closed and needs to be locked, as push-pull rod 2 continues to move away from clip 3, the latching member 33 on clip 3 will pass over locking platform 10 and enter locking groove 13. At this time, the latching member 33 will be blocked by locking side 102 on locking platform 10 and cannot swing back. The inability of clip 3 to swing back means that clip 3 cannot be reopened and can only remain closed, thus achieving the locking of clip 3 in the closed state.

[0115] In optional embodiments, the snap-fit ​​member 33 can be various types of boss structures, or spherical or hemispherical protrusions, or it can be a snap-fit, barb, or other structure that engages with the locking platform 10.

[0116] To address the shortcomings of existing hemostatic clips, the clamping mechanism proposed in this embodiment features a protrusion at the tail of the clamping piece 3, with a locking platform 10 positioned along the movement path of the protrusion. The locking platform 10 limits the protrusion's position, thus locking the clamping piece 3 in the clamped state. This method is simple to operate, provides excellent clamping effect, and avoids the generation of foreign objects, thus minimizing inconvenience to patients and medical staff.

[0117] Referring to Figures 9 and 10, in a preferred embodiment, the latching member 33 is a three-dimensional boss with a guide surface 120 for abutting against the locking platform 10. In this configuration, the guide surface 120 is generally inclined or curved, and it serves as a guide, allowing the latching member 33 to more easily cross the locking platform 10 from the release side 101 and fall into the locking groove 13.

[0118] Generally speaking, the widths of the guide groove 14 and the locking groove 13 can be equal or unequal. When the widths of the guide groove 14 and the locking groove 13 are unequal, it means that the guide groove 14 is larger than the locking groove 13 or smaller than the locking groove 13. The widths of the guide groove 14 and the locking groove 13 will affect the length of the locking platform 10, and thus affect the fit between the locking platform 10 and the snap-fit ​​part 33. The widths of the guide groove 14 and the locking groove 13 should be designed according to actual needs.

[0119] Referring to Figure 6, in one embodiment, the width of the guide groove 14 is greater than the width of the locking groove 13. Based on the aforementioned principle, when the clamp 3 is closed, the latching member 33 at the tail of the clip 3 moves from the outside of the guide groove 14 towards the release side 101 of the locking platform 10; when the clamp 3 is open, it moves from the release side 101 of the locking platform 10 along the guide groove 14 outwards. Therefore, it is necessary to avoid interference between the inner wall of the guide groove 14 and the latching member 33, so the width of the guide groove 14 needs to be relatively wide. The locking groove 13, on the other hand, needs to restrict the movement of the latching member 33. This restriction is achieved by the inner wall of the locking groove 13 and the locking platform 10 abutting against the latching member 33. Therefore, the width of the locking groove 13 is relatively narrow, and the size of the locking groove 13 can be designed so that the latching member 33 slides in precisely without excessive sliding.

[0120] In this embodiment, the clamping teeth 36 and clamping protrusions 37 on the clamping arm 35 can further improve the clamping effect of the clamping mechanism on the lesion, that is, the occlusion effect on the wound is better. At the same time, this design can also make the clamping mechanism have a better gripping effect.

[0121] Furthermore, during the hemostatic clip closure procedure, the clamping mechanism needs to be advanced along the endoscopic forceps channel to the vicinity of the lesion. Referring to Figure 15, the presence of clamping teeth 36 and clamping protrusions 37 may result in the clamping piece 3 being in a fully closed state, yet the width of the clamping mechanism's end is still too large, making insertion into the endoscopic forceps channel difficult. Therefore, referring to Figures 7 and 16, in this embodiment, the clamping arm 35 is tilted towards the side where the clamping teeth 36 are located. At this time, when the clamping piece 3 is in a fully closed state, the width of the clamping mechanism's end is significantly reduced, thus facilitating insertion into the endoscopic forceps channel. In a preferred embodiment, the tilt angle A of the clamping arm 35 is 0° to 30°.

[0122] Furthermore, referring to Figures 8, 9, and 16, in another improved embodiment, the clamping protrusions 37 on the two clamping plates 3 are staggered. Compared to the situation where the clamping protrusions 37 on the two clamping plates 3 directly abut each other, which would hinder closure, in this embodiment, when the clamping plates 3 are closed, because the clamping protrusions 37 are staggered, the width dimension of the end of the clamping mechanism does not increase too much, thus making it easier for the clamping mechanism to be inserted into the endoscope channel.

[0123] According to the operation procedure of the clamping method, after the hemostatic clamp has clamped the lesion, only the clamp head should be retained, that is, the clamp head mechanism needs to be detached from the rest of the hemostatic clamp. In this embodiment, the push-pull rod 2 and the clamping piece 3 must first be detached. That is, the push-pull rod 2 is detachably connected to the two clamping pieces 3 through two connecting pieces 9 respectively.

[0124] Therefore, referring to Figures 2 and 11 to 14, in a preferred embodiment, one of the connected clips 3 and connecting pieces 9 is provided with a first connecting shaft 21, and the other is provided with a first connecting hole 31, with the first connecting shaft 21 rotatably engaged with the first connecting hole 31; one of the connected connecting pieces 9 and push-pull rod 2 is provided with a second connecting shaft 22, and the other is provided with a second connecting hole 32, with the second connecting shaft 22 rotatably engaged with the second connecting hole 32; a disengagement groove 30 communicating with the outside is provided on the first connecting hole 31 or the second connecting hole 32, and the through size of the disengagement groove 30 is smaller than the diameter of the corresponding first connecting shaft 21 or second connecting shaft 22.

[0125] This implementation method can combine the linear motion of the push-pull rod 2 to disengage the push-pull rod 2 from the clamping plate 3 after the clamping mechanism completes the clamping and locking. The working principle of this disengagement mechanism needs to be explained in conjunction with the specific structural form.

[0126] The following is a specific embodiment: one of the connected clamping piece 3 and connecting piece 9 is provided with a first connecting shaft 21, and the other is provided with a first connecting hole 31. It can be understood that the first connecting shaft 21 can be disposed on the clamping piece 3, and the first connecting hole 31 can be correspondingly disposed on the connecting piece 9. Similarly, the first connecting shaft 21 can also be disposed on the connecting piece 9, and the first connecting hole 31 can be correspondingly disposed on the clamping piece 3. In short, the connected clamping piece 3 and connecting piece 9 form a movable connection, i.e., a hinge, through the engagement of the shaft and hole.

[0127] Furthermore, one of the connected connecting piece 9 and the push-pull rod 2 is provided with a second connecting shaft 22, and the other is provided with a second connecting hole 32. The second connecting shaft 22 and the second connecting hole 32 are rotatably engaged. Similar to the connection form of the clamping piece 3 and the connecting piece 9, the second connecting shaft 22 and the second connecting hole 32 can be configured to form a hinge. In this embodiment, the arrangement of the second connecting shaft 22 and the second connecting hole 32 is not unique; taking the second connecting hole 32 being provided on the push-pull rod 2 as an example, there is only one disengagement slot 30. In this embodiment, it is taken as being provided only on the second connecting hole 32.

[0128] Understandably, in this structural form, when the release groove 30 is not deformed under force, since the through size of the release groove 30 is smaller than the diameter of the second connecting shaft 22, the connecting piece 9 and the push-pull rod 2 can be connected to each other in a hinged manner.

[0129] Furthermore, based on the structural form described above, the working principle for disengaging the push-pull rod 2 from the clamp 3 is as follows: When the push-pull rod 2 moves linearly away from the clamp 3, the clamp 3 will fully close and lock. The locking process is described above. After locking, the clamp 3 continues to maintain the movement trend of the push-pull rod 2. The second connecting hole 32 will move relative to the second connecting shaft 22, and the second connecting shaft 22 will apply a force to the second connecting hole 32. Due to the presence of the disengagement groove 30, the second connecting hole 32 will gradually deform until the second connecting shaft 22 and the second connecting hole 32 are fully disengaged. At this point, since the disengagement groove 30 is located on the push-pull rod 2, the push-pull rod 2 can be pulled out of the body along with the rest of the hemostatic clamp, while the connecting seat 1, the two connecting pieces 9, and the two clamps 3 can remain inside the body.

[0130] In addition to the structural forms described above, the release groove 30 can also be provided on the connecting piece 9, that is, the deformation of the second connecting hole 32 on the connecting piece 9 can realize the release of the second connecting shaft 22. Alternatively, in other structural forms, the release groove 30 can also be provided on the first connecting hole 31, and the first connecting hole 31 can be provided on the clamping piece 3 or the connecting piece 9. In this case, the push-pull rod 2 does not separate from the connecting piece 9, but the connecting piece 9 can separate from the clamping piece 3, and the connecting piece 9 and the push-pull rod 2 can leave the human body along with the rest of the hemostatic clamp.

[0131] Based on the structural form and working principle described above, it can be seen that the clamping mechanism of this embodiment improves the driving method of the clamping plate 3 by using the push-pull rod 2 and the connecting plate 9 to push the clamping plate 3, thereby realizing the closing and opening of the clamping plate 3. Obviously, the combination of the push-pull rod 2 and the connecting plate 9 is more rigid than the traditional steel wire rope, enabling the clamping plate 3 to push away human tissue as much as possible when obstructed. In addition, when the clamping mechanism is released, no debris or other foreign objects are generated, and no additional trouble is caused to medical staff and patients.

[0132] Understandably, since the release groove 30 is a key structure for achieving the disengagement of the push-pull rod 2, connecting piece 9, and clamping piece 3, the dimensions of the release groove 30 are also crucial. In a preferred embodiment, the width of the release groove 30 is less than 30% of the diameter of the first connecting shaft 21 or the second connecting shaft 22. This embodiment can ensure the connection strength of the push-pull rod 2, connecting piece 9, and clamping piece 3 during normal connection, and can also smoothly achieve the disengagement of the push-pull rod 2, connecting piece 9, and clamping piece 3.

[0133] Furthermore, since the connecting piece 9, clamping piece 3, and push-pull rod 2 are connected by shaft holes in this technical solution, the positions of the first connecting shaft 21 and the first connecting hole 31 can be flexibly adjusted during actual production. Similarly, the positions of the second connecting shaft 22 and the second connecting hole 32 can also be flexibly adjusted. This allows the structural combination of the connecting piece 9, clamping piece 3, and push-pull rod 2 to have a certain degree of replaceability, providing greater flexibility in the production stage and greater tolerance for the supply chain, thereby improving production efficiency.

[0134] Furthermore, referring to Figure 6, in a further embodiment, the connecting seat 1 is provided with a guide hole 11. The two clamping pieces 3 are respectively connected to the push-pull rod 2 through two connecting pieces 9 passing through the guide hole 11. The guide hole 11 is conical, and the conical guide hole 11 gradually converges from the side near the clamping piece 3 to the other side to form a guide slope 110. The guide slope 110 is used to abut against the connecting piece 9 or the push-pull rod 2. In this embodiment, after the connecting piece 9 and the guide rod pass through the guide hole 11 and are connected to the clamping piece 3, during the process of the connecting piece 9 driving the clamping piece 3 to move, the movement of the connecting piece 9 is a composite movement of translation and oscillation, which will inevitably come into contact with the inner wall of the guide hole 11. Therefore, in this embodiment, the guide hole 11 is set to be conical. The guide slope 110 formed by the inner wall of the conical guide hole 11 can follow the movement trend of the connecting piece 9, avoid interference, and thus ensure the opening and closing effect of the clamping piece 3. Furthermore, when the chuck mechanism is released, if the connecting piece 9 leaves the chuck mechanism together with the push-pull rod 2, the guide slope 110 can also guide the connecting piece 9 as it retracts with the push-pull rod 2, so that the two connecting pieces 9 naturally converge, thus allowing them to pass through the connecting seat 1 more easily and complete the retraction.

[0135] Because current clamping mechanisms, such as the clamping plate 3, are mostly made of stainless steel or other metals, the clamping mechanism itself may contain magnetism. This could prevent patients who have undergone endoscopic minimally invasive treatment from undergoing MRI scans for a short period of time, and could also cause them to fail security checks when traveling. Therefore, in a preferred embodiment, the clamping plate 3, connecting seat 1, and connecting plate 9 are preferably made of non-magnetic elastic materials or non-magnetic absorbable materials. Specifically, these include pure titanium, magnesium alloy, zinc alloy, polylactic acid, polyglycolic acid, polyglycolic acid, polyglycolic acid-trimethylene carbonate, polyetheretherketone, polyamide, polyoxymethylene, ultra-high molecular weight polyethylene, and polycarbonate. In a preferred embodiment, pure titanium or polyetheretherketone can be selected as needed. This ensures that the clamping mechanism remains in the body and is compatible with MRI scans, meaning it does not affect the patient's MRI examination or security checks.

[0136] Example 2

[0137] Referring to Figures 17 to 30, this embodiment proposes a clamp assembly, including a connecting base 1, a push-pull rod 2, two connecting pieces 9, and two clamping pieces 3. The two clamping pieces 3 intersect and are hinged to the connecting base 1, and the two clamping pieces 3 are respectively connected to the push-pull rod 2 through the two connecting pieces 9.

[0138] One of the connected clips 3 and connecting pieces 9 is provided with a first connecting shaft 21, and the other is provided with a first connecting hole 31. The first connecting shaft 21 and the first connecting hole 31 are rotatably engaged. One of the connected connecting pieces 9 and push-pull rod 2 is provided with a second connecting shaft 22, and the other is provided with a second connecting hole 32. The second connecting shaft 22 and the second connecting hole 32 are rotatably engaged. The first connecting hole 31 or the second connecting hole 32 is provided with a release groove 30 that communicates with the outside. The through size of the release groove 30 is smaller than the diameter of the corresponding first connecting shaft 21 or second connecting shaft 22.

[0139] The clamp assembly of this embodiment serves as a component of a hemostatic clamp. Its connecting seat 1 and push-pull rod 2 are initially connected to the rest of the hemostatic clamp. When a medical procedure is performed using the hemostatic clamp clamping method, the connecting seat 1 and clamp 3 can detach from the rest of the hemostatic clamp. Hemostatic clamps typically control the clamp assembly through a traction mechanism composed of components such as steel wire ropes. For simplicity, this embodiment does not elaborate on the rest of the hemostatic clamp; it only describes how the push-pull rod 2, controlled by the traction mechanism in the hemostatic clamp, can move linearly along the axial direction of the connecting seat 1.

[0140] The clamp assembly of this embodiment mainly includes two working modes: one working mode is to control the opening and closing of the clamping plate 3 by the axial movement of the push-pull rod 2; the other working mode is to control the push-pull rod 2 to disengage from the clamping plate 3 by the axial movement of the push-pull rod 2.

[0141] The working principle of the opening and closing of the clamp 3 is as follows: When the push-pull rod 2 moves linearly along the axis of the connecting seat 1, the connecting piece 9 will push and pull the tail of the clamp 3. Since the two clamps 3 intersect and are hinged to the connecting seat 1, the clamp 3 will swing during the process of the connecting piece 9 pushing and pulling the clamp 3, thereby realizing the control of the opening and closing of the clamp 3.

[0142] Understandably, since the through-size of the release groove 30 is smaller than the diameter of the corresponding first connecting shaft 21 or second connecting shaft 22, the push-pull rod 2, the connecting piece 9 and the clamp 3 can maintain connection during the opening and closing operation of the clamp 3.

[0143] The working principle of disengaging the push-pull rod 2 from the clamping piece 3 needs to be explained in conjunction with the specific structural form. The following is an example of a specific implementation: one of the connected clamping piece 3 and the connecting piece 9 has a first connecting shaft 21, and the other has a first connecting hole 31. It can be understood that the first connecting shaft 21 can be located on the clamping piece 3, and the first connecting hole 31 can be correspondingly located on the connecting piece 9. Similarly, the first connecting shaft 21 can also be located on the connecting piece 9, and the first connecting hole 31 can be correspondingly located on the clamping piece 3. In short, the connected clamping piece 3 and the connecting piece 9 form a movable connection, i.e., a hinge, through the engagement of the shaft and hole.

[0144] Furthermore, one of the connected connecting piece 9 and the push-pull rod 2 is provided with a second connecting shaft 22, and the other is provided with a second connecting hole 32. The second connecting shaft 22 and the second connecting hole 32 are rotatably engaged. Similar to the connection form of the clamping piece 3 and the connecting piece 9, the second connecting shaft 22 and the second connecting hole 32 can be configured to form a hinge. In this embodiment, the arrangement of the second connecting shaft 22 and the second connecting hole 32 is not unique. Referring to Figure 17, taking the second connecting hole 32 being provided on the push-pull rod 2 as an example, there is only one disengagement slot 30. In this embodiment, it is taken as being provided only on the second connecting hole 32.

[0145] Based on the above-described structure, the working principle for disengaging the push-pull rod 2 from the clamp 3 is as follows: When the push-pull rod 2 moves linearly away from the clamp 3, the clamp 3 will fully close. If the push-pull rod 2 continues its movement, the second connecting hole 32 will move relative to the second connecting shaft 22. The second connecting shaft 22 will apply a force to the second connecting hole 32. Due to the presence of the disengagement groove 30, the second connecting hole 32 will gradually deform until the second connecting shaft 22 and the second connecting hole 32 are fully disengaged. At this point, since the disengagement groove 30 is located on the push-pull rod 2, the push-pull rod 2 can be pulled out of the body along with the rest of the hemostatic clamp, while the connecting seat 1, the two connecting pieces 9, and the two clamps 3 can remain inside the body.

[0146] In addition to the structural forms described above, the release groove 30 can also be provided on the connecting piece 9, that is, the deformation of the second connecting hole 32 on the connecting piece 9 can realize the release of the second connecting shaft 22. Alternatively, in other structural forms, the release groove 30 can also be provided on the first connecting hole 31, and the first connecting hole 31 can be provided on the clamping piece 3 or the connecting piece 9. In this case, the push-pull rod 2 does not separate from the connecting piece 9, but the connecting piece 9 can separate from the clamping piece 3, and the connecting piece 9 and the push-pull rod 2 can leave the human body along with the rest of the hemostatic clamp.

[0147] Based on the structural form and working principle described above, it is clear that, addressing the technical problems of existing hemostatic clips, the clamp assembly of this embodiment improves the driving method of the clamp 3 by using the push-pull rod 2 and the connecting piece 9 to push the clamp 3, thereby realizing the closing and opening of the clamp 3. Obviously, the combination of the push-pull rod 2 and the connecting piece 9 is more rigid than the traditional steel wire rope, enabling the clamp 3 to push away human tissue as much as possible when obstructed. In addition, when the clamp assembly is released, no debris or other foreign objects are generated, and no additional trouble is caused to medical staff and patients.

[0148] Understandably, since the release groove 30 is a key structure for achieving the disengagement of the push-pull rod 2, connecting piece 9, and clamping piece 3, the dimensions of the release groove 30 are also crucial. In a preferred embodiment, the width of the release groove 30 is less than 30% of the diameter of the first connecting shaft 21 or the second connecting shaft 22. This embodiment can ensure the connection strength of the push-pull rod 2, connecting piece 9, and clamping piece 3 during normal connection, and can also smoothly achieve the disengagement of the push-pull rod 2, connecting piece 9, and clamping piece 3.

[0149] Furthermore, since the connecting piece 9, clamping piece 3, and push-pull rod 2 are connected by shaft holes in this technical solution, the positions of the first connecting shaft 21 and the first connecting hole 31 can be flexibly adjusted during actual production. Similarly, the positions of the second connecting shaft 22 and the second connecting hole 32 can also be flexibly adjusted. This allows the structural combination of the connecting piece 9, clamping piece 3, and push-pull rod 2 to have a certain degree of replaceability, providing greater flexibility in the production stage and greater tolerance for the supply chain, thereby improving production efficiency.

[0150] When using hemostatic clips for medical procedures, the clip assembly must ultimately maintain the clamping of the diseased tissue; that is, certain measures need to be taken to keep clip 3 in a clamped state. For example, in some surgical procedures, ligation or elastic band ligation can be used to keep clip 3 in a clamped state.

[0151] However, the above method is complicated to operate and has poor effect. Here, a preferred embodiment is proposed: the clamping piece 3 is provided with a snap-fit ​​member 33, and the connecting seat 1 is provided with a locking part for restricting the movement of the snap-fit ​​member 33. The two locking parts corresponding to the two clamping pieces 3 are centrally symmetrically arranged on the connecting seat 1. The locking part includes a guide groove 14 and a locking groove 13. The guide groove 14 and the locking groove 13 are separated by a locking platform 10. The side of the locking platform 10 facing the guide groove 14 is the release side 101, and the side of the locking platform 10 facing the locking groove 13 is the locking side 102. The snap-fit ​​member 33 is used to abut against the release side 101 and the locking side 102.

[0152] This implementation enables the clip 3 to be locked after closing. Its working principle is as follows: the latching member 33 swings with the clip 3. When the clip 3 has not passed the locking platform 10, its movement is stopped when the latching member 33 abuts against the release side 101 of the locking platform 10. That is, the latching member 33 on the clip 3 can freely slide into or out of the guide groove 14, and at this time, the clip 3 is not locked. When the clip 3 is fully closed, and the push-pull rod 2 is not disengaged from the clip 3, as the push-pull rod 2 continues to move away from the clip 3, the latching member 33 on the clip 3 will pass the locking platform 10 and enter the locking groove 13. At this time, the latching member 33 will be blocked by the locking side 102 on the locking platform 10 and cannot swing in the opposite direction. The inability of the clip 3 to swing in the opposite direction means that the clip 3 cannot reopen and can only remain closed. Thus, the closed state of the clip 3 is locked.

[0153] In optional embodiments, the snap-fit ​​member 33 can be various types of bosses, or spherical or hemispherical protrusions, or it can be a buckle, barb, or other structure that engages with the locking platform 10.

[0154] In a preferred embodiment, referring to Figures 26 and 27, the latching member 33 is a three-dimensional boss with a guide surface 120 for abutting against the locking platform 10. In this configuration, the guide surface 120 is generally curved or inclined, and it serves as a guide to facilitate the latching member 33's easier passage from the release side 101 over the locking platform 10 into the locking groove 13.

[0155] Generally, the widths of the guide groove 14 and the locking groove 13 can be equal or unequal, and can be adjusted according to the actual production process. Unequal widths of the guide groove 14 and the locking groove 13 mean that the width of the guide groove 14 can be greater than the width of the locking groove 13, or the width of the guide groove 14 can be less than the width of the locking groove 13.

[0156] In one embodiment, referring to Figure 23, the width of the guide groove 14 is greater than the width of the locking groove 13. Based on the aforementioned principle, when the clip 3 is closed, the latching member 33 at the tail of the clip 3 moves from the outside of the guide groove 14 towards the release side 101 of the locking platform 10; when the clip 3 is open, it moves from the release side 101 of the locking platform 10 along the guide groove 14 outwards. Therefore, it is necessary to avoid interference between the inner wall of the guide groove 14 and the latching member 33, so the width of the guide groove 14 needs to be relatively wide. The locking groove 13, on the other hand, needs to restrict the movement of the latching member 33. This restriction is achieved by the inner wall of the locking groove 13 and the locking platform 10 abutting against the latching member 33. Therefore, the width of the locking groove 13 is relatively narrow, and the size of the locking groove 13 can be designed so that the latching member 33 slides in precisely without excessive sliding.

[0157] Furthermore, in a further embodiment, referring to Figure 23, the connecting seat 1 is provided with a guide hole 11. The two clamping pieces 3 are respectively connected to the push-pull rod 2 via two connecting pieces 9 passing through the guide hole 11. The guide hole 11 is conical, and the conical guide hole 11 gradually converges from one end near the clamping piece 3 to the other end so that the inner wall of the guide hole 11 forms a guide slope 110, which is used to abut against the connecting piece 9 or the push-pull rod 2. In this embodiment, after the connecting piece 9 and the guide rod pass through the guide hole 11 and are connected to the clamping piece 3, during the process of the connecting piece 9 driving the clamping piece 3 to move, the movement of the connecting piece 9 is a composite movement of translation and oscillation, which inevitably comes into contact with the inner wall of the guide hole 11. Therefore, in this embodiment, the guide hole 11 is set to be conical. The guide slope 110 formed by the inner wall of the conical guide hole 11 can follow the movement trend of the connecting piece 9, avoid interference, and thus ensure the opening and closing effect of the clamping piece 3. Furthermore, when the chuck assembly is released, if the connecting piece 9 leaves the chuck assembly together with the push-pull rod 2, the guide slope 110 can also guide the connecting piece 9 as it retracts with the push-pull rod 2, so that the two connecting pieces 9 naturally converge, thus allowing them to pass through the connecting seat 1 more easily and complete the retraction.

[0158] As described above, the chuck assembly needs to be delivered along the endoscope channel to the vicinity of the lesion. Obviously, if the width of the end of the chuck assembly is too large, it will be difficult to insert the chuck assembly into the endoscope channel.

[0159] Therefore, referring to Figure 24, in a further embodiment, the clamp 3 includes a clamping arm 35, and for any clamp 3, the head end of the clamping arm 35 is inclined toward the side where the clamping arm 35 of the other clamp 3 is located. In this case, when the clamp 3 is in a fully closed state, the width of the end of the clamping assembly is greatly reduced, thereby facilitating insertion of the clamping assembly into the endoscope channel. In a preferred embodiment, the inclination angle A of the clamping arm 35 is 0° to 30°.

[0160] Example 3

[0161] Referring to Figures 31 to 33, this embodiment proposes a clamping and releasing mechanism, including a clamping mechanism of Embodiment 1 or 2, and further including a rotating ring seat 4, a first rotating ring 5, a second rotating ring 6, and a hook 7. The rotating ring seat 4 is located on one side of the connecting seat 1, and a limiting platform 40 is fixedly provided on the rotating ring seat 4. The first rotating ring 5 is located inside the rotating ring seat 4, and both ends of the first rotating ring 5 abut against the limiting platform 40. The outer wall of the second rotating ring 6 is fixedly connected to the inner wall of the first rotating ring 5. An extension boss 60 is fixedly provided on the second rotating ring 6, and a first release hole 61 is provided on the extension boss 60. A second release hole 12 is provided on the connecting seat 1. A hanging claw 71 is fixedly provided at the end of the hook 7, and the hanging claw 71 passes through the first release hole 61 and is inserted into the second release hole 12.

[0162] The clamping mechanism proposed in Embodiment 1 or 2 enables the connection and disengagement between the clamping plate 3 and the push-pull rod 2. However, to achieve the disengagement of the clamping mechanism from the rest of the hemostatic clamp, it is also necessary to disengage the connecting seat 1 from the rest of the hemostatic clamp. This embodiment enables the connection and release of the clamping mechanism from the rest of the hemostatic clamp.

[0163] The clamping and releasing mechanism of this embodiment can achieve the connection and disengagement of the clamp assembly from the rest of the hemostatic clamp in Embodiment 1 or 2. Its principle is as follows: the rotating ring seat 4, the first rotating ring 5, the second rotating ring 6, and the hook 7 are all components of the hemostatic clamp. The rotating ring seat 4 assembles the first rotating ring 5 inside it via the limiting platform 40, while still ensuring that the first rotating ring 5 can rotate. The inner wall of the first rotating ring 5 and the outer wall of the second rotating ring 6 are fixedly connected by welding or bonding, or are integrally formed. The claw 71 on the hook 7 passes through both the first release hole 61 on the extending boss 60 and the second release hole 12 on the connecting seat 1, thus connecting the second rotating ring 6 to the connecting seat 1. Therefore, the connection between the rest of the hemostatic clamp and the clamping mechanism is achieved.

[0164] The release process of the clamp mechanism occurs after the push-pull rod 2 disengages from the clamping piece 3. When the push-pull rod 2 disengages from the connecting piece 9, or when the push-pull rod 2 remains connected to the connecting piece 9 but the connecting piece 9 disengages from the clamping piece 3, the push-pull rod 2, or the push-pull rod 2 together with the connecting piece 9, moves axially along the connecting seat 1 until it abuts against the hook 7, exerting a force on the hook 7. This force causes the claw 71 to disengage from the second release hole 12 on the connecting seat 1. Clearly, since the clamp mechanism relies solely on the cooperation of the first release hole 61 and the second release hole 12 with the claw 71 to connect with the rest of the hemostatic clamp, when the claw 71 disengages from the second release hole 12, the clamp mechanism, except for the push-pull rod 2 (or except for the push-pull rod 2 and the connecting piece 9), can be released and retained in the body to clamp the lesion. Meanwhile, components such as the rotating seat 4, the first rotating ring 5, the second rotating ring 6, and the hook 7 can leave the body along with the main body of the hemostatic clamp. This allows the remaining parts of the hemostatic clamp to be separated from the clamping mechanism.

[0165] Example 4

[0166] This embodiment proposes a hemostatic clip, including the clamping and releasing mechanism of Embodiment 1 or 2, and further including a handle 80, a sliding handle 81, a rotating wheel 82, a plastic-coated spring tube 88, and a spindle 83; the end of the handle 80 is provided with a finger ring 84, and the hook 7 is also provided with a through hole 72. The plastic-coated spring tube 88 is sleeved on the outside of the spindle 83, one end of the plastic-coated spring tube 88 is fixedly connected to the end of the handle 80, and the other end of the plastic-coated spring tube 88 is fixedly connected to the rotating ring seat 4. The sliding handle 81 is slidably disposed on the handle 80, one end of the spindle 83 is fixedly connected to the sliding handle 81 through a fixing tube 85, and the other end of the spindle 83 passes through the through hole 72 and is fixedly connected to the push-pull rod 2. The rotating wheel 82 is rotatably connected to the handle 80, and a flat part is provided inside the rotating wheel 82. The spindle 83 passes through the flat part and is engaged with the flat part through a conduit 87.

[0167] This embodiment, combined with embodiments 1, 2, and 3, constitutes a complete hemostatic clip. In this embodiment, the sliding handle 81 and the spindle 83, along with other related structures, form a traction mechanism capable of driving the push-pull rod 2 to move axially. That is, the sliding of the sliding handle 81 relative to the handle 80 drives the push-pull rod 2 to move axially via the spindle 83, realizing the opening, closing, locking, and release operations of the clamp mechanism. The fixed connection between the spindle 83 and the push-pull rod 2 can be achieved through various connection methods, such as interference fit between the shaft and hole, bonding, or welding.

[0168] The rotating wheel 82 can transmit its rotation to the clamp 3 through the cooperation of its internal flat part and the spindle 83, thereby controlling the rotation of the clamp 3. The finger ring 84 at the end of the handle 80 can improve the ease of operation of the hemostatic clip and can accommodate more gripping methods.

[0169] Example 5

[0170] Referring to Figures 37 to 49, this embodiment proposes a hemostatic clip, including a connecting seat 1, a metal wire, and two clips 3. The two clips 3 intersect, and the intersection is hinged to the connecting seat 1. The tail of the clip 3 is provided with a deformation hole 331 and a connecting through hole 332. The deformation hole 331 and the connecting through hole 332 communicate to form a three-way integral hole, so that the tail of the clip 3 forms a first deformation wall 333 and a second deformation wall 334.

[0171] The connector 1 is provided with a guide hole 11. The metal wire includes a first segment 221 and a second segment 222. Both the first segment 221 and the second segment 222 pass through the guide hole 11. The ends of the first segment 221 and the second segment 222 are fixedly provided with ball heads 223. The diameter of the ball head 223 is larger than the through size of the connecting through hole 332 and smaller than the size of the deformation hole 331. The first segment 221 and the second segment 222 respectively pass through the connecting through holes 332 on the two clips 3, and the ball head 223 is located in the deformation hole 331.

[0172] A snap-fit ​​element 33 is provided on the clamping piece 3 near the deformation hole 331. A locking part for restricting the movement of the snap-fit ​​element 33 is provided on the connecting seat 1. The two locking parts corresponding to the two clamping pieces 3 are centrally symmetrically arranged on the connecting seat 1. The locking part includes a guide groove (or release groove) 14 and a locking groove 13. The guide groove (or release groove) 14 and the locking groove 13 are separated by a limiting boss 10. The side of the limiting boss 10 facing the guide groove 14 (or release groove) is the release side (or non-limiting side) 101, and the side of the limiting boss 10 facing the locking groove 13 is the locking side (or limiting side) 102. The snap-fit ​​element 33 is used to abut against the release side (or non-limiting side) 101 and the locking side (or limiting side) 102.

[0173] The hemostatic clip of this embodiment can perform three operations: opening and closing the clip 3, locking the clip 3 after it is closed, and disengaging the clip 3 from the metal wire after it is locked. The disengagement of the metal wire from the clip 3 is necessary to ensure that the connecting seat 1 and the locked clip 3 remain inside the body to maintain clamping of the lesion, and is a necessary operation for hemostasis using the clamping method. The above three operations are achieved by pulling on the metal wire; the principle of pulling the metal wire can be referenced from the relevant structure in conventional hemostatic clips.

[0174] The working principle of the opening and closing process of the clamp 3 is as follows: When the metal wire is pushed or pulled, since the diameter of the ball head 223 is larger than the through size of the connecting through hole 332, the ball head 223 will not directly disengage from the connecting through hole 332, but will drive the clamps 3 on both sides to rotate, thereby realizing the opening and closing of the clamp 3.

[0175] When locking of clip 3 after closure is not required, the fully closed state of clip 3 is the state in which the snap-fit ​​33 slides into the guide groove (or release groove) 14 from the outside until it abuts against the release side (or non-restriction side) 101 of the limiting boss 10. When clip 3 is in the fully closed state, maintaining this state allows clip 3 and connecting seat 1, etc., to be easily inserted into the endoscope channel. Furthermore, after clip 3 and other parts are advanced along the endoscope channel to the vicinity of the lesion, clip 3 can be reopened or closed by pulling the metal wire, thereby clamping the lesion.

[0176] Obviously, during the opening and closing process of the clip 3, the movement of the clip 3 ends when the snap fastener 33 abuts against the release side (or non-restriction side) 101 of the limiting boss 10. That is, the snap fastener 33 on the clip 3 can freely slide into the guide groove (or release groove) 14 or freely slide out of the guide groove (or release groove) 14. At this time, the clip 3 is not locked.

[0177] After the clamping operation on the lesion is completed, the clamp 3, which is in the closed state, can be locked. As described above, when the clamp 3 is fully closed, the locking piece 33 on the clamp 3 is already in contact with the release side (or non-restricting side) 101 on the limiting boss 10. When it is necessary to lock the clamp 3, continue pulling the wire, and the locking piece 33 on the clamp 3 will pass over the limiting boss 10 and enter the locking groove 13. At this time, the locking piece 33 will be blocked by the locking side (or restricting side) 102 on the limiting boss 10 and cannot swing back. The inability of the clamp 3 to swing back means that the clamp 3 cannot be reopened and can only remain closed, thus achieving the locking of the clamp 3 in the closed state.

[0178] In optional embodiments, the snap-fit ​​element 33 can be various types of boss structures, such as spherical or hemispherical protrusions, or it can be a buckle, barb, or other structure that engages with the limiting boss 10. It is understandable that since the snap-fit ​​element 33 is provided at the tail of the clamping piece 3, it may interfere with the base 1 when the clamping piece 3 swings. The first groove 14 and the second groove 13 provide a space for the snap-fit ​​element 33, preventing interference between the snap-fit ​​element 33 and the base 1. The widths of the first groove (guide groove or release groove) 14 and the second groove 13 can be equal or unequal.

[0179] Therefore, the hemostatic clip proposed in this embodiment achieves locking of the clip 3 in the clamped state by setting a locking member 33 at the tail of the clip 3 and setting a limiting protrusion 10 on the movement path of the locking member 33, so as to limit the locking member 33 through the limiting protrusion 10. This method is simple to operate, has a good clamping effect, does not generate additional foreign objects, and will not cause trouble for patients and medical staff.

[0180] The separation of clip 3 from the metal wire occurs after clip 3 is locked. The working principle of this separation process is as follows: When clip 3 is in the locked state, continuing to pull the metal wire causes the ball heads 223 on the first segment 221 and the second segment 222 to continue applying force to the first deformation wall 333 and the second deformation wall 334. The first deformation wall 333 and the second deformation wall 334 continue to deform until the through-hole 332 is larger than the diameter of the ball head 223. The ball head 223 is then pulled out, and the metal wire separates from clip 3. Subsequently, the metal wire passes through the guide hole 11 and leaves the connecting seat 1 along with the rest of the hemostatic clip, while clip 3 and connecting seat 1 remain in the body to ensure the closure of the lesion.

[0181] Based on the above description, it can be seen that the hemostatic clip of this embodiment improves the structure of the clip 3. A deformation hole 331 and a connecting through hole 332 are formed at the tail of the clip 3. The deformation hole 331 and the connecting through hole 332 are used to connect with the ball head 223 at the end of the metal wire. That is, through a simple mating structure, the clamping and locking control and the release control of the clip 3 are combined, which reduces the complexity of the movement of the metal wire and improves the ease of operation of the hemostatic clip.

[0182] Furthermore, in this embodiment, the deformation hole 331 and the connecting through hole 332 are designed as an integral three-way hole, which can not only avoid the impact on the strength of the clamping piece 3 due to the opening of multiple holes, and prevent the clamping piece 3 from deforming or even being damaged during use, but also ensure that the first deformation wall 333 and the second deformation wall 334 have sufficient deformation to meet the locking action of the clamping piece 3 and the disengagement action of the metal wire from the clamping piece 3.

[0183] Furthermore, this integrated hole structure can greatly reduce the processing difficulty, eliminating the need to consider the relative positioning relationship between the deformation hole 331 and the connecting through hole 332, and greatly reducing the precision requirements for design and manufacturing.

[0184] Furthermore, this technical solution does not generate foreign objects such as debris, avoiding potential uncertainties caused by foreign objects remaining in the patient's body, and also avoiding additional foreign object removal operations during surgery. It should be noted that the foreign object here refers to the foreign object generated due to the detachment of the clip 3 from the metal wire (there is no foreign object in this embodiment), but the clip 3 and the connecting seat 1 will still remain in the human body to ensure the closure of the lesion wound, which is a necessary operation of the hemostatic clip closure method treatment.

[0185] As explained above, the clip 3 and connecting seat 1 need to be advanced along the endoscopic forceps channel to the vicinity of the lesion. Even when the clip 3 is fully closed, the width of its end may still be too large, making it difficult to insert into the endoscopic forceps channel. Therefore, referring to Figure 45, in an improved embodiment, in a further embodiment, the clip 3 includes a clamping arm 35. For any clip 3, the head end of the clamping arm 35 is tilted towards the side where the clamping arm 35 of the other clip 3 is located. In this case, when the clip 3 is fully closed, the width of its end will be greatly reduced, thus making it easier for the clip 3 and connecting seat 1 to be inserted into the endoscopic forceps channel. In a preferred embodiment, the tilt angle A of the clamping arm 35 is 0° to 30°.

[0186] As explained above, the metal wire will eventually pass through the guide hole 11 and leave the connector 1. However, due to the presence of the ball head 223, it may interfere with the inner wall of the guide hole 11, causing the metal wire to detach unsmoothly. Therefore, in an improved embodiment, the diameter of the guide hole 11 is greater than or equal to the sum of the diameters of the ball heads 223. In this case, the ball heads 223 located on the first segment 221 and the second segment 222 can pass through the guide hole 11 simultaneously, avoiding jamming.

[0187] Furthermore, in another improved embodiment, there is a length difference ΔL between the first segment 221 and the second segment 222, where ΔL is greater than or equal to the diameter of the ball head 223. Therefore, the ball heads 223 of the first segment 221 and the second segment 222 will be staggered, and will not pass through the guide hole 11 simultaneously, but rather in sequence, thereby preventing the ball head 223 from getting stuck in the guide hole 11.

[0188] As explained above, the opening and closing of the clamp 3 is achieved by the ball head 223 applying force to the inner wall of the deformation hole 331. In the aforementioned embodiment, there is a length difference between the first segment 221 and the second segment 222. However, if the position of the deformation hole 331 is not adjusted, it may affect the control of the opening and closing of the clamp 3. Therefore, referring to Figure 37, in a further embodiment, the distance between the deformation hole 331 on one clamp 3 and the intersection of the clamp 3 is c1, and the distance between the deformation hole 331 on the other clamp 3 and the intersection of the two clamps 3 is c2, satisfying c1≠c2. This allows the position of the deformation hole 331 to adapt to the different lengths of the first segment 221 and the second segment 222, so that the control of the opening and closing of the clamp 3 remains precise.

[0189] Regarding the locking design of the clip 3 after clamping, referring to Figure 40, in a preferred embodiment, the movement path of the snap-fit ​​member 33 in the guide groove (or release groove) 14 is projected onto the plane where the guide groove (or release groove) 14 is located to form a region P1. The region P1 forms a boundary M1 and a boundary M2 along the axial direction of the connecting seat 1. The distance between the boundary M1 and the boundary M2 is dm1, and the width of the guide groove (or release groove) 14 is d1, satisfying d1≥dm1.

[0190] The movement path of the snap-fit ​​33 in the locking groove 13 is projected onto the plane where the locking groove 13 is located to form a region P2. The region P2 forms a boundary M3 and a boundary M4 along the axial direction of the connecting seat 1. The distance between the boundary M3 and the boundary M4 is dm2, and the width of the locking groove 13 is d2, which satisfies d2≤dm2.

[0191] Based on the aforementioned principle, when the clamp 3 is closed, the latching member 33 at the tail of the clamp 3 will move from the outside of the guide groove (or release groove) 14 toward the release side (or non-restriction side) 101 of the limiting boss 10. When the clamp 3 is open, it will move from the release side (or non-restriction side) 101 of the limiting boss 10 along the guide groove 14 to the outside. Therefore, it is necessary to avoid interference between the inner wall of the guide groove (or release groove) 14 and the latching member 33. Thus, the width of the guide groove (or release groove) 14 should be relatively wide, that is, it is necessary to satisfy d1≥dm1.

[0192] The locking groove 13 needs to restrict the movement of the snap-fit ​​33. The restriction of the movement of the snap-fit ​​33 is achieved by the inner wall of the locking groove 13 and the limiting boss 10 abutting against the snap-fit ​​33. Therefore, the width of the locking groove 13 is relatively narrow, satisfying d2≤dm2. Specifically, the size of the locking groove 13 can be designed so that the snap-fit ​​33 can slide in just right without excessive sliding.

[0193] Furthermore, referring to Figures 47 to 49, in another preferred embodiment, the latching member 33 is a three-dimensional boss with a guide surface 120 provided on it. The guide surface 120 is used to abut against the release side 101 of the limiting boss 10. In this manner, the guide surface 120 is generally inclined or curved, and the guide surface 120 on the three-dimensional boss can play a guiding role, so that the latching member 33 can more easily pass over the limiting boss 10 from the release side 101 and fall into the locking groove 13.

[0194] For hemostasis using the clipping method, after the wound is clamped, the clip 3 and connector 1 remain inside the body. However, current hemostatic clips often use stainless steel or other metals for the clip 3 and connector 1, which may result in the clip 3 or connector 1 being magnetic. This could prevent patients who have undergone endoscopic minimally invasive treatment from undergoing MRI scans for a short period or from passing security checks. Therefore, in a preferred embodiment, both the clip 3 and connector 1 are made of non-magnetic elastic materials or non-magnetic absorbable materials. These include pure titanium, magnesium alloy, zinc alloy, polylactic acid, polyglycolic acid, polyglycolic acid, polyglycolic acid-trimethylene carbonate, polyetheretherketone, polyamide, polyoxymethylene, ultra-high molecular weight polyethylene, and polycarbonate. In a preferred embodiment, pure titanium or polyetheretherketone can be selected as needed. This ensures that the clip 3 and connector 1 remain inside the body while still allowing for MRI scans, meaning it does not affect the patient's MRI examination or security checks.

[0195] Example 6

[0196] Referring to Figures 50 to 52, the hemostatic clip of this embodiment, compared with the technical solution of Embodiment 5, can be improved as follows: it further includes a rotating ring seat 4, a first rotating ring 5, a second rotating ring 6, and a hook 7. The rotating ring seat 4 is located on one side of the connecting seat 1, and a limiting block 40 is fixedly provided on the rotating ring seat 4. The first rotating ring 5 is located inside the rotating ring seat 4, and both ends of the first rotating ring 5 abut against the limiting block 40 respectively. The outer wall of the second rotating ring 6 is fixedly connected to the inner wall of the first rotating ring 5. An extension boss 60 is fixedly provided on the second rotating ring 6, and a first release hole 61 is provided on the extension boss 60. A second release hole 12 is provided on the connecting seat 1. A hanging claw 71 is fixedly provided at the end of the hook 7, and the hanging claw 71 passes through the first release hole 61 and is inserted into the second release hole 12.

[0197] Example 5 achieves the separation of the metal wire from the clip 3, but the clip 3 and the connecting seat 1 are only part of the hemostatic clip. There are still other connections between the connecting seat 1 and the rest of the hemostatic clip. This example designs a connection structure between the connecting seat 1 and the rest of the hemostatic clip to ensure that the connecting seat 1 and the clip 3 can be completely released.

[0198] Based on the structural description of this embodiment, the principle by which the connecting seat 1 connects and disconnects from the rest of the hemostatic clip is as follows: the rotating ring seat 4 assembles the first rotating ring 5 inside it through the limiting block 40, but still ensures that the first rotating ring 5 can rotate. The inner wall of the first rotating ring 5 and the outer wall of the second rotating ring 6 are fixedly connected by welding or bonding, or the two are integrally formed. The claw 71 on the hook 7 passes through the first release hole 61 on the extension boss 60 and the second release hole 12 on the connecting seat 1, realizing the connection between the second rotating ring 6 and the connecting seat 1.

[0199] The release process of the connecting seat 1 occurs after the metal wire separates from the clip 3. After the metal wire separates from the clip 3, it continues to move axially until it abuts against the hook 7 and exerts a force on the hook 7. This force causes the claw 71 to disengage from the second release hole 12 on the connecting seat 1. Obviously, since the connecting seat 1 is connected only by the cooperation of the first release hole 61 and the second release hole 12 with the claw 71, when the claw 71 disengages from the second release hole 12, the connecting seat 1 and its clip 3 and other structures can be released, thus remaining in the body to keep the wound closed. The swivel seat 4, the first swivel 5, the second swivel 6, and the hook 7 below the connecting seat 1 can all leave the body along with the rest of the hemostatic clamp.

[0200] Referring to Figure 53, in a further embodiment, the hemostatic clip also includes a handle 80, a sliding handle 81, a rotating wheel 82, and a spindle 83; a finger ring 84 is provided at the end of the handle 80. The sliding handle 81 is slidably disposed on the handle 80. One end of the spindle 83 is fixedly connected to the sliding handle 81 through a fixing tube 85, and the other end of the spindle 83 passes through a through hole 72 and is fixedly connected to a metal wire through a connecting tube 86. The rotating wheel 82 is rotatably connected to the handle 80. A flat section is provided inside the rotating wheel 82, and the spindle 83 passes through the flat section and is engaged with the flat section through a conduit 87.

[0201] In this embodiment, the sliding handle 81 and spindle 83, along with other related structures, constitute a traction mechanism capable of pulling the metal wire. Specifically, the sliding of the sliding handle 81 relative to the handle 80 drives the metal wire axially via the spindle 83, enabling the opening, closing, locking, and release of the clamp 3. The rotating wheel 82, through its internal flat portion engaging with the spindle 83, transmits its rotation to the clamp 3, thereby controlling the rotation of the clamp 3. The finger ring 84 at the end of the handle 80 enhances the ease of operation of the hemostatic clip, accommodating various gripping methods.

[0202] The foregoing illustrative description of this disclosure and its embodiments is not restrictive, and the accompanying drawings are only one embodiment of this disclosure; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of this disclosure, such designs should fall within the protection scope of this disclosure.

[0203] This disclosure also includes, but is not limited to, the following technical solutions.

[0204] Technical solution A1: A clamping mechanism, characterized in that it includes a connecting seat (1), a push-pull rod (2), two connecting pieces (9) and two clamping pieces (3);

[0205] The two clamping pieces (3) intersect, and the intersection is hinged to the connecting seat (1). The push-pull rod (2) is detachably connected to the two clamping pieces (3) respectively through the two connecting pieces (9).

[0206] The clamp (3) includes a clamp arm (35), a clamping tooth (36) is fixedly provided on the clamp arm (35), a clamping boss (37) is fixedly provided at the end of the clamp arm (35), and the clamp arm (35) is inclined to the side where the clamping tooth (36) is located.

[0207] The clamp (3) is provided with a snap-fit ​​member (33), and the connecting seat (1) is provided with a locking part for restricting the movement of the snap-fit ​​member (33). The two locking parts corresponding to the two clamps (3) are centrally symmetrically arranged on the connecting seat (1).

[0208] The locking part includes a guide groove (14) and a locking groove (13), which are separated by a locking platform (10). The side of the locking platform (10) facing the guide groove (14) is the release side (101), and the side of the locking platform (10) facing the locking groove (13) is the locking side (102). The snap-fit ​​member (33) is used to abut against the release side (101) and the locking side (102).

[0209] Technical solution A2: A clamping mechanism according to technical solution A1, characterized in that the snap-fit ​​member (33) is a three-dimensional boss, and a guide surface (120) is provided on the three-dimensional boss, the guide surface (120) being used to abut against the locking platform (10).

[0210] Technical solution A3: A chuck mechanism according to technical solution A1 or A2, characterized in that the width of the guide groove (14) is not equal to the width of the locking groove (13).

[0211] Technical Solution A4. A clamping mechanism according to any one of technical solutions A1-A3, characterized in that one of the connected clamping piece (3) and the connecting piece (9) is provided with a first connecting shaft (21), and the other is provided with a first connecting hole (31), the first connecting shaft (21) and the first connecting hole (31) being rotatably engaged; one of the connected connecting piece (9) and the push-pull rod (2) is provided with a second connecting shaft (22), and the other is provided with a second connecting hole (32), the second connecting shaft (22) and the second connecting hole (32) being rotatably engaged; a disengagement groove (30) communicating with the outside is provided on the first connecting hole (31) or the second connecting hole (32), the through size of the disengagement groove (30) being smaller than the diameter of the corresponding first connecting shaft (21) or second connecting shaft (22).

[0212] Technical solution A5. A clamping mechanism according to any one of technical solutions A1-A4, characterized in that a guide hole (11) is provided on the connecting seat (1), and the two clamping pieces (3) are respectively connected to the push-pull rod (2) through two connecting pieces (9) passing through the guide hole (11); the guide hole (11) is conical, and the conical guide hole (11) gradually converges from the side near the clamping piece (3) to the other side to form a guide slope (110), and the guide slope (110) is used to abut against the connecting piece (9) or the push-pull rod (2).

[0213] Technical solution A6. A clamping mechanism according to any one of technical solutions A1-A5, characterized in that the tilt angle A of the clamping arm (35) is 0° to 30°.

[0214] Technical solution A7. A clamping mechanism according to any one of technical solutions A1-A6, characterized in that the clamping bosses (37) located on the two clamping arms (35) are staggered.

[0215] Technical solution A8. A clamping mechanism according to any one of technical solutions A1-A7, characterized in that the clamping piece (3), the connecting seat (1) and the connecting piece (9) are made of non-magnetic elastic material or non-magnetic absorbable material.

[0216] Technical solution A9, a hemostatic clip, comprising a clamping mechanism as described in any one of technical solutions A1-A8, characterized in that it further comprises a rotating ring seat (4), a first rotating ring (5), a second rotating ring (6) and a hook (7);

[0217] The rotating seat (4) is located on one side of the connecting seat (1). A limiting platform (40) is fixedly provided on the rotating seat (4). The first rotating ring (5) is located inside the rotating seat (4), and the two ends of the first rotating ring (5) abut against the limiting platform (40) respectively.

[0218] The outer wall of the second rotating ring (6) is fixedly connected to the inner wall of the first rotating ring (5). An extension boss (60) is fixedly provided on the second rotating ring (6). A first release hole (61) is provided on the extension boss (60). A second release hole (12) is provided on the connecting seat (1). A hanging claw (71) is fixedly provided at the end of the hook (7). The hanging claw (71) passes through the first release hole (61) and is inserted into the second release hole (12).

[0219] Technical solution A10, a hemostatic clip according to technical solution A9, characterized in that it further includes a handle (80), a sliding handle (81), a rotating wheel (82), a plastic-coated spring tube (88) and a spindle (83); the end of the handle (80) is provided with a finger ring (84), and the hook (7) is also provided with a through hole (72);

[0220] The plastic-coated spring tube (88) is sleeved on the outside of the spindle (83). One end of the plastic-coated spring tube (88) is fixedly connected to the end of the handle (80), and the other end of the plastic-coated spring tube (88) is fixedly connected to the rotating seat (4). The sliding handle (81) is slidably disposed on the handle (80). One end of the spindle (83) is fixedly connected to the sliding handle (81) through the fixing tube (85), and the other end of the spindle (83) passes through the through hole (72) and is fixedly connected to the push-pull rod (2).

[0221] The rotating wheel (82) is rotatably connected to the handle (80). A flat part is provided inside the rotating wheel (82). The spindle (83) passes through the flat part and is engaged with the flat part through a conduit (87).

[0222] In addition, this disclosure also includes, but is not limited to, the following technical solutions.

[0223] Technical solution B1, a clamp assembly, characterized in that it includes a connecting seat (1), a push-pull rod (2), two connecting pieces (9) and two clamping pieces (3);

[0224] The two clamping pieces (3) intersect and are hinged to the connecting seat (1). The two clamping pieces (3) are respectively connected to the push-pull rod (2) through two connecting pieces (9).

[0225] One of the connected clips (3) and the connecting piece (9) is provided with a first connecting shaft (21), and the other is provided with a first connecting hole (31). The first connecting shaft (21) and the first connecting hole (31) are rotatably engaged.

[0226] One of the connected connecting piece (9) and the push-pull rod (2) is provided with a second connecting shaft (22), and the other is provided with a second connecting hole (32). The second connecting shaft (22) and the second connecting hole (32) are rotatably engaged.

[0227] The first connecting hole (31) or the second connecting hole (32) is provided with a detachment groove (30) that communicates with the outside world. The through size of the detachment groove (30) is smaller than the diameter of the corresponding first connecting shaft (21) or second connecting shaft (22).

[0228] Technical solution B2, a clamp assembly according to technical solution B1, characterized in that the clamping piece (3) is provided with a snap-fit ​​member (33), the connecting seat (1) is provided with a locking part for restricting the movement of the snap-fit ​​member (33), and the two locking parts corresponding to the two clamping pieces (3) are centrally symmetrically arranged on the connecting seat (1);

[0229] The locking part includes a guide groove (14) and a locking groove (13), which are separated by a locking platform (10). The side of the locking platform (10) facing the guide groove (14) is the release side (101), and the side of the locking platform (10) facing the locking groove (13) is the locking side (102). The snap-fit ​​member (33) is used to abut against the release side (101) and the locking side (102).

[0230] Technical solution B3, a chuck assembly according to technical solution B2, characterized in that the width of the guide groove (14) is not equal to the width of the locking groove (13).

[0231] Technical solution B4. A clamp assembly according to technical solution B2, characterized in that the snap-fit ​​member (33) is a three-dimensional boss, and a guide surface (120) is provided on the three-dimensional boss, the guide surface (120) being used to abut against the release side (101) of the locking platform (10).

[0232] Technical solution B5. A clamp assembly according to any one of technical solutions B1-B4, characterized in that a guide hole (11) is provided on the connecting seat (1), and the two clamping pieces (3) are respectively connected to the push-pull rod (2) through two connecting pieces (9) passing through the guide hole (11); the guide hole (11) is conical, and the conical guide hole (11) gradually converges from one end near the clamping piece (3) to the other end so that the inner wall of the guide hole (11) forms a guide slope (110), and the guide slope (110) is used to abut against the connecting piece (9) or the push-pull rod (2).

[0233] Technical solution B6. A clamp assembly according to any one of technical solutions B1-B5, characterized in that the clamping piece (3) includes a clamping arm (35), and for any clamping piece (3), the head end of the clamping arm (35) is inclined toward the side where the clamping arm (35) is located on the other clamping piece (3).

[0234] Technical solution B7, a clamp assembly according to technical solution B6, characterized in that the tilt angle A of the clamp arm (35) is 0° to 30°.

[0235] Technical solution B8. A clamp assembly according to any one of technical solutions B1-B7, characterized in that the clamping piece (3), the connecting seat (1) and the connecting piece (9) are made of non-magnetic elastic material or non-magnetic absorbable material.

[0236] Technical solution B9, a clamping and releasing mechanism, comprising a clamping assembly as described in any one of technical solutions B1-B8, characterized in that it further comprises a rotating ring seat (4), a first rotating ring (5), a second rotating ring (6) and a hook (7);

[0237] The rotating seat (4) is located on one side of the connecting seat (1). A limiting platform (40) is fixedly provided on the rotating seat (4). The first rotating ring (5) is located inside the rotating seat (4), and the two ends of the first rotating ring (5) abut against the limiting platform (40) respectively.

[0238] The outer wall of the second rotating ring (6) is fixedly connected to the inner wall of the first rotating ring (5). An extension boss (60) is fixedly provided on the second rotating ring (6). A first release hole (61) is provided on the extension boss (60). A second release hole (12) is provided on the connecting seat (1). A hanging claw (71) is fixedly provided at the end of the hook (7). The hanging claw (71) passes through the first release hole (61) and is inserted into the second release hole (12).

[0239] Technical solution B10, a hemostatic clip, including the clamping and releasing mechanism described in technical solution B9, characterized in that it further includes a handle (80), a sliding handle (81), a rotating wheel (82), a plastic-coated spring tube (88) and a spindle (83); the end of the handle (80) is provided with a finger ring (84), and the hook (7) is also provided with a through hole (72);

[0240] The plastic-coated spring tube (88) is sleeved on the outside of the spindle (83). One end of the plastic-coated spring tube (88) is fixedly connected to the end of the handle (80), and the other end of the plastic-coated spring tube (88) is fixedly connected to the rotating seat (4). The sliding handle (81) is slidably disposed on the handle (80). One end of the spindle (83) is fixedly connected to the sliding handle (81) through the fixing tube (85), and the other end of the spindle (83) passes through the through hole (72) and is fixedly connected to the push-pull rod (2).

[0241] The rotating wheel (82) is rotatably connected to the handle (80). A flat part is provided inside the rotating wheel (82). The spindle (83) passes through the flat part and is engaged with the flat part through a conduit (87).

[0242] In addition, this disclosure also includes, but is not limited to, the following technical solutions.

[0243] Technical solution C1, a hemostatic clip, characterized in that it includes a connecting seat (1), a metal wire and two clips (3);

[0244] The two clamping pieces (3) intersect and are hinged to the connecting seat (1) at the intersection. The tail of the clamping piece (3) is provided with a deformation hole (31) and a connecting through hole (32). The deformation hole (31) and the connecting through hole (32) are connected to form a three-way integrated hole, so that the tail of the clamping piece (3) forms a first deformation wall (33) and a second deformation wall (34).

[0245] The connecting seat (1) is provided with a guide hole (11). The metal wire includes a first segment (21) and a second segment (22). Both the first segment (21) and the second segment (22) pass through the guide hole (11). A ball head (23) is fixedly provided at the end of both the first segment (21) and the second segment (22). The diameter of the ball head (23) is larger than the through size of the connecting through hole (32), and the diameter of the ball head (23) is smaller than the size of the deformation hole (31). The first segment (21) and the second segment (22) respectively pass through the connecting through holes (32) on the two clips (3), and the ball head (23) is located in the deformation hole (31).

[0246] A snap-fit ​​member (30) is provided on the clamping piece (3) near the deformation hole (31), and a locking part is provided on the connecting seat (1) to restrict the movement of the snap-fit ​​member (30). The two locking parts corresponding to the two clamping pieces (3) are centrally symmetrically arranged on the connecting seat (1).

[0247] The locking part includes a release groove (14) and a locking groove (13), which are separated by a limiting boss (10). The side of the limiting boss (10) facing the release groove (14) is the non-limiting side (101), and the side of the limiting boss (10) facing the locking groove (13) is the limiting side (102). The snap-fit ​​member (30) is used to abut against the non-limiting side (101) and the limiting side (102).

[0248] Technical solution C2. A hemostatic clip according to technical solution C1, characterized in that the clip (3) includes a clip arm (35), and for any clip (3), the head end of the clip arm (35) is inclined toward the side where the clip arm (35) is located on the other clip (3).

[0249] Technical solution C3, a hemostatic clip according to technical solution C1 or C2, characterized in that the diameter of the guide hole (11) is greater than or equal to the sum of the diameters of the ball head (23).

[0250] Technical solution C4. A hemostatic clip according to any one of technical solutions C1-C3, characterized in that there is a length difference ΔL between the first segment (21) and the second segment (22), wherein ΔL is greater than or equal to the diameter of the ball head (23).

[0251] Technical solution C5. A hemostatic clip according to any one of technical solutions C1-C4, characterized in that the distance between the deformation hole (31) on one clip (3) and the intersection of the clip (3) is c1, and the distance between the deformation hole (31) on the other clip (3) and the intersection of the two clips (3) is c2, satisfying c1≠c2.

[0252] Technical solution C6. A hemostatic clip according to any one of technical solutions C1-C5, characterized in that the movement path of the snap-fit ​​member (30) in the release groove (14) is projected onto the plane where the release groove (14) is located to form a region P1, the region P1 forms a boundary M1 and a boundary M2 along the axial direction of the connecting seat (1), the distance between the boundary M1 and the boundary M2 is dm1, and the width of the release groove (14) is d1, satisfying d1≥dm1;

[0253] The movement path of the snap-fit ​​member (30) in the locking groove (13) is projected onto the plane where the locking groove (13) is located to form a region P2. The region P2 forms a boundary M3 and a boundary M4 along the axial direction of the connecting seat (1). The distance between the boundary M3 and the boundary M4 is dm2. The width of the locking groove (13) is d2, which satisfies d2≤dm2.

[0254] Technical solution C7. A hemostatic clip according to any one of technical solutions C1-C6, characterized in that the snap-fit ​​member (30) is a three-dimensional boss, and a guide surface (120) is provided on the three-dimensional boss, the guide surface (120) being used to abut against the non-restricting side (101) of the limiting boss (10).

[0255] Technical solution C8. A hemostatic clip according to any one of technical solutions C1-C7, characterized in that the connecting seat (1) and the clip (3) are made of non-magnetic elastic material or non-magnetic absorbable material.

[0256] Technical solution C9, a hemostatic clip according to any one of technical solutions C1-C8, characterized in that it further includes a rotating seat (4), a first rotating ring (5), a second rotating ring (6) and a hook (7);

[0257] The rotating seat (4) is located on one side of the connecting seat (1). A limiting block (40) is fixedly provided on the rotating seat (4). The first rotating ring (5) is located inside the rotating seat (4), and the two ends of the first rotating ring (5) abut against the limiting block (40) respectively.

[0258] The outer wall of the second rotating ring (6) is fixedly connected to the inner wall of the first rotating ring (5). An extension boss (60) is fixedly provided on the second rotating ring (6). A first release hole (61) is provided on the extension boss (60). A second release hole (12) is provided on the connecting seat (1). A hanging claw (71) is fixedly provided at the end of the hook (7). The hanging claw (71) passes through the first release hole (61) and is inserted into the second release hole (12).

[0259] Technical solution C10, a hemostatic clip according to technical solution C9, characterized in that it further includes a handle (80), a sliding handle (81), a rotating wheel (82) and a spindle (83); the end of the handle (80) is provided with a finger ring (84), and the hook (7) is provided with a through hole (72);

[0260] The sliding handle (81) is slidably disposed on the handle (80). One end of the spindle (83) is fixedly connected to the sliding handle (81) through the fixing tube (85), and the other end of the spindle (83) passes through the through hole (72) and is fixedly connected to the metal wire through the connecting tube (86).

[0261] The rotating wheel (82) is rotatably connected to the handle (80). A flat part is provided inside the rotating wheel (82). The spindle (83) passes through the flat part and is engaged with the flat part through a conduit (87).

Claims

1. A chuck mechanism, comprising: Connecting seat (1), wherein a guide hole (11) is provided on the connecting seat (1); Connecting piece (9); Push-pull rod (2); and The clamping piece (3) is connected to the push-pull rod (2) via the connecting piece (9). The guide hole (11) is tapered and gradually converges from the side near the clamping piece (3) to the other side to form a guide slope (110) that abuts against the connecting piece (9) or the push-pull rod (2).

2. The chuck mechanism according to claim 1, wherein, One of the clamping piece (3) and the connecting piece (9) is provided with a first connecting shaft (21), and the other is provided with a first connecting hole (31). One of the connecting piece (9) and the push-pull rod (2) is provided with a second connecting shaft (22), and the other is provided with a second connecting hole (32). A disengagement groove (30) is provided on the first connecting hole (31) or the second connecting hole (32), and the through size of the disengagement groove (30) is smaller than the diameter of the corresponding first connecting shaft (21) or second connecting shaft (22).

3. The chuck mechanism according to claim 1 or 2, wherein, The clamp (3) includes a clamp arm (35), and a clamping tooth (36) is fixedly provided on the clamp arm (35). The clamp arm (35) is inclined to the side where the clamping tooth (36) is located.

4. The chuck mechanism according to claim 1 or 2, wherein, The clamping mechanism includes two intersecting clamping plates (3), each clamping plate (3) including a clamping arm (35), the head end of which is inclined toward the other clamping plate (3).

5. The chuck mechanism according to claim 3 or 4, wherein, The tilt angle (A) of the clamping arm (35) is 0° to 30°.

6. The chuck mechanism according to any one of claims 1 to 5, wherein, The clamping mechanism includes two intersecting clamping plates (3), and a clamping boss (37) is fixedly provided at the head end of the clamping arm (35) of each clamping plate (3). The clamping boss (37) is staggered with the clamping boss (37) of the clamping arm (35) of the other clamping plate (3).

7. The chuck mechanism according to any one of claims 1 to 6, wherein, The clip (3), connecting piece (9) and / or connecting seat (1) are made of non-magnetic elastic material or non-magnetic absorbable material.

8. A clamping and releasing mechanism, comprising a clamping mechanism according to any one of claims 1 to 7.

9. The clamping and releasing mechanism according to claim 8 further includes: A rotating seat (4) is located on one side of the connecting seat (1), and a limit block (40) is fixedly provided on the rotating seat (4); The first rotating ring (5) is located inside the rotating ring seat (4), and the two ends of the first rotating ring (5) abut against the limiting block (40) respectively; The second rotating ring (6) has its outer wall fixedly connected to the inner wall of the first rotating ring (5), and an extension boss (60) is fixedly provided on the second rotating ring (6). as well as The hook (7) has a claw (71) fixedly provided at its end. The extension boss (60) is provided with a first release hole (61), the connecting seat (1) is provided with a second release hole (12), and the claw (71) passes through the first release hole (61) and is inserted into the second release hole (12).

10. A hemostatic clip, comprising the clamping and releasing mechanism according to claim 9.

11. The hemostatic clip according to claim 10, further comprising: A handle (80), the end of which is provided with a finger ring (84); A sliding handle (81) is slidably mounted on the handle (80); A rotating wheel (82) is rotatably connected to the handle (80); A spindle (83), one end of which is fixedly connected to the sliding handle (81) via a fixing tube (85), and the other end of which passes through a through hole (72) on the hook (7) and is fixedly connected to the push-pull rod (2); and A spring tube (88) is sleeved on the outside of the spindle (83). One end of the spring tube (88) is fixedly connected to the end of the handle (80), and the other end is fixedly connected to the swivel seat (4). The rotating wheel (82) has a flat section inside, and the spindle (83) passes through the flat section and is engaged with the flat section through a conduit (87).

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