Chuck mechanism and hemostatic clip

Abstract

The invention relates to the technical field of hemostatic clips, in particular to a chuck mechanism and a hemostatic clip. In order to solve the technical problem that an existing hemostatic clip has defects, according to the chuck mechanism and the hemostatic clip, the boss is arranged at the tail of the clamping piece, the locking table is arranged on the movement path of the boss, and the clamping piece is locked in the clamping state through the limiting effect of the locking table on the boss. The mode is easy and convenient to operate, the clamping and closing effect is good, foreign matter cannot be additionally generated, and troubles cannot be caused to patients and medical staff.

Description

Technical Field

[0001] The invention relates to the technical field of hemostatic clips, and in particular to a clamp mechanism and a hemostatic clip. Background Art

[0002] With the development of endoscopic technology and other related technologies, endoscopic hemostasis has become the preferred treatment for gastrointestinal bleeding. Currently, the commonly used endoscopic hemostasis methods include laser coagulation, electrocoagulation, local injection of drug hemostasis, drug spraying, and suture clip closure. Among them, hemostatic clip closure has become the most effective and clinically valuable non-surgical treatment for gastrointestinal bleeding due to its low trauma, fast hemostasis, low incidence of rebleeding, few complications, and definite efficacy.

[0003] The hemostatic clips currently available on the market are mainly divided into two types: the slide type and the spring type. Both types of hemostatic clips are composed of a clamp tube, a clamping piece, and a stop pin. When the clamping method is used for surgical operations, 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 so that the clamp head remains clamped, and then the clamp head is separated from the rest of the body so that the clamp head can remain in the body and continue to clamp the diseased tissue to achieve hemostasis.

[0004] However, the locking methods of the existing hemostatic clips are different, and there may be defects such as the locking of the clip is not firm, or the locking operation is not convenient enough, resulting in poor clamping effect of the clip, or the clip is difficult to lock.

[0005] Furthermore, when the clamp of the existing hemostatic clamp is released, foreign matter such as debris will inevitably be generated. The generation and cleaning of the foreign matter will cause trouble and extra workload to medical staff, and leave potential hidden dangers to patients. Summary of the invention

[0006] In view of the technical problems of defects in existing hemostatic clips, the present invention provides a clamp mechanism and a hemostatic clip, which provides a boss at the tail of the clip and a locking platform on the moving path of the boss, so that the clip is locked in the clamping state through the limiting effect of the locking platform on the boss. This method is easy to operate, has a good clamping effect, and will not produce additional foreign matter, and will not cause trouble to patients and medical staff.

[0007] The technical solution provided by the present invention is: a chuck mechanism, comprising a connecting seat, a push-pull rod, two connecting plates and two clamping plates; the two clamping plates intersect and are hinged with the connecting seat at the intersection, and the push-pull rod is detachably connected to the two clamping plates through the two connecting plates; the clamping plate comprises a clamping arm, on which a clamping tooth is fixedly provided, and a clamping boss is fixedly provided at the end of the clamping arm, and the clamping arm is inclined toward the side where the clamping tooth is located; a clamping piece is provided on the clamping piece, and a locking part for limiting the movement of the clamping piece is provided on the connecting seat, and the two locking parts corresponding to the two clamping pieces are centrally symmetrically arranged on the connecting seat; the locking part comprises a guide groove and a locking groove, and the guide groove and the locking groove are separated by a locking platform, the side of the locking platform facing the guide groove is a releasing side, and the side of the locking platform facing the locking groove is a locking side, and the clamping piece is used to abut against the releasing side and the locking side.

[0008] Optionally, the clamping member is a three-dimensional boss, and a guide surface is provided on the three-dimensional boss, and the guide surface is used to abut against the locking platform.

[0009] Optionally, the width of the guide groove is not equal to the width of the locking groove.

[0010] Optionally, one of the connected clip and the connecting piece is provided with a first connecting shaft, and the other is provided with a first connecting hole, and the first connecting shaft is 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, and the second connecting shaft is rotatably engaged with the second connecting hole; the first connecting hole or the second connecting hole is provided with a disengagement groove connected to the outside, and the passing size of the disengagement groove is smaller than the diameter of the corresponding first connecting shaft or the second connecting shaft.

[0011] Optionally, a guide hole is provided on the connecting seat, and the two clips are respectively connected to the push-pull rod through two connecting pieces passing through the guide holes; the guide hole is conical, and the conical guide hole gradually converges from one side close to the clip 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.

[0012] Optionally, the inclination angle A of the clamping arm is 0° to 30°.

[0013] Optionally, the clamping bosses on the two clamping arms are arranged alternately.

[0014] Optionally, the clip, the connecting seat and the connecting sheet are made of non-magnetic elastic material or non-magnetic absorbable material.

[0015] A hemostatic clip comprises the above-mentioned clamping mechanism, and also comprises a swivel seat, a first swivel, a second swivel and a hook; the swivel seat is located on one side of the connecting seat, a limiting platform is fixedly provided on the swivel seat, the first swivel is located in the swivel seat, and the two ends of the first swivel are respectively abutted against the limiting platform; 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 hanging claw is fixedly provided on the end of the hook, and the hanging claw passes through the first release hole and is plugged into the second release hole.

[0016] Optionally, it also includes a handle, a sliding handle, a rotating wheel, a plastic-coated spring tube and a core shaft; a finger ring is provided at the end of the handle, and a through hole is also provided on the hook; the plastic-coated spring tube is sleeved on the outside of the core shaft, 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 swivel seat, the sliding handle is slidably arranged on the handle, one end of the core shaft is fixedly connected to the sliding handle through a fixed tube, and the other end of the core shaft is fixedly connected to the push-pull rod through the through hole; the rotating wheel is rotatably connected to the handle, a flat position is provided in the rotating wheel, and the core shaft passes through the flat position and is clamped with the flat position through a catheter.

[0017] Beneficial Effects

[0018] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: in view of the technical problems of the defects of the existing hemostatic clips, the present invention provides a boss at the tail of the clip and a locking platform on the moving path of the boss, so that the clip is locked in the clamping state through the limiting effect of the locking platform on the boss. This method is easy to operate, has a good clamping effect, and does not produce additional foreign matter, and does not cause trouble to patients and medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the structural schematic diagrams of the clamping mechanism proposed in the embodiment of the present invention.

[0020] Figure 2 This is the second structural schematic diagram of the chuck mechanism proposed in the embodiment of the present invention.

[0021] Figure 3 This is the third structural schematic diagram of the chuck mechanism proposed in the embodiment of the present invention.

[0022] Figure 4 for Figure 3 A magnified schematic diagram of center A.

[0023] Figure 5 This is a schematic structural diagram of a connecting socket proposed in an embodiment of the present invention.

[0024] Figure 6 A schematic cross-sectional view of a connecting socket according to an embodiment of the present invention.

[0025] Figure 7 This is one of the structural schematic diagrams of the clip proposed in the embodiment of the present invention.

[0026] Figure 8 This is the second structural schematic diagram of the clip proposed in the embodiment of the present invention.

[0027] Fig. 9 This is the third structural schematic diagram of the clip proposed in the embodiment of the present invention.

[0028] Fig.10 for Fig. 9 A magnified schematic diagram of point B in the middle.

[0029] Fig.11 This is one of the structural schematic diagrams of the connecting piece proposed in the embodiment of the present invention.

[0030] Fig.12 This is the second structural schematic diagram of the connecting piece proposed in the embodiment of the present invention.

[0031] Fig.13 This is one of the structural schematic diagrams of the push-pull rod proposed in the embodiment of the present invention.

[0032] Fig.14 This is the second structural schematic diagram of the push-pull rod proposed in the embodiment of the present invention.

[0033] Fig.15 This is one of the schematic diagrams of the clip engagement proposed in the embodiment of the present invention.

[0034] Fig.16 This is the second schematic diagram of the clip engagement according to the embodiment of the present invention.

[0035] Fig.17 This is a schematic structural diagram of the first rotating ring proposed in an embodiment of the present invention.

[0036] Fig.18 This is a schematic diagram of the structure of the second rotating ring proposed in an embodiment of the present invention.

[0037] Fig.19 This is a schematic diagram of the structure of the hook proposed in an embodiment of the present invention.

[0038] Fig. 20 This is a schematic diagram of the structure of the hemostatic clip provided in an embodiment of the present invention.

[0039] Fig.21 This is one of the working schematic diagrams of the hemostatic clip provided in the embodiment of the present invention.

[0040] Fig. 22This is the second working schematic diagram of the hemostatic clip proposed in the embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0042] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the invention are shown in the accompanying drawings. The words "first", "second", etc. described in the present invention are set for the convenience of describing the technical solution of the present invention, and have no specific limiting effect. They are all general references and do not constitute a limiting effect on the technical solution of the present invention. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Multiple technical solutions in the same embodiment, and multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions without contradictions or conflicts, all of which are within the scope of protection required by the present invention.

[0043] Example 1

[0044] Combined with Figure 1 To Attachment Fig.14 This embodiment provides a clamping mechanism, including a connecting seat 1, a push-pull rod 2, two connecting pieces 9 and two clamping pieces 3. The two clamping pieces 3 intersect and are hinged with the connecting seat 1 at the intersection, and the push-pull rod 2 is detachably connected to the two clamping pieces 3 through the two connecting pieces 9. The clamping piece 3 includes a clamping arm 35, on which a clamping tooth 36 is fixedly provided, and a clamping boss 37 is fixedly provided at the end of the clamping arm 35, and the clamping arm 35 is inclined to the side where the clamping tooth 36 is located.

[0045] The clip 3 is provided with a clamping member 33, and the connection seat 1 is provided with a locking portion for limiting the movement of the clamping member 33. The two locking portions corresponding to the two clips 3 are centrally symmetrically arranged on the connection seat 1. The locking portion 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 a release side 101, and the side of the locking platform 10 facing the locking groove 13 is a locking side 102. The clamping member 33 is used to abut against the release side 101 and the locking side 102.

[0046] The clamp mechanism of this embodiment is a part of the hemostatic clamp assembly, and is connected to the push-pull rod 2 by a pulling mechanism composed of components such as a steel wire rope in the hemostatic clamp. The push-pull rod 2 is detachably connected to the clamp 3 through two connecting plates 9. When the push-pull rod 2 is pushed or pulled, the clamp 3 can be driven to swing, thereby realizing the clamping and opening of the clamp 3.

[0047] After the clamping mechanism completes clamping the diseased wound, it needs to maintain the clamping state, that is, the clamping mechanism in the clamping state needs to be locked. The specific working principle is: the clamping member 33 swings with the swing of the clip 3. When the clip 3 does not pass the locking platform 10, its movement stroke ends when the clamping member 33 abuts against the release side 101 of the locking platform 10, that is, the clamping member 33 on the clip 3 can freely slide into the guide groove 14, or freely slide out of the guide groove 14, and the clip 3 is not locked at this time.

[0048] When the clip 3 is fully closed and needs to be locked, as the push-pull rod 2 continues to move away from the clip 3, the clip 33 on the clip 3 will pass over the locking platform 10 and enter the locking groove 13. At this time, the clip 33 will be blocked by the locking side 102 on the locking platform 10 and cannot swing in the opposite direction. The clip 3 cannot swing in the opposite direction, which means that the clip 3 cannot be reopened and can only remain in the closed state, thereby achieving the locking of the closed state of the clip 3.

[0049] In an optional embodiment, the clamping member 33 may be various types of boss structures, or spherical or hemispherical protrusions, or may be structures such as buckles and barbs that engage with the locking platform 10 .

[0050] In view of the defects of the existing hemostatic clips, the clamp mechanism proposed in this embodiment is to set a boss at the tail of the clip 3 and set a locking platform 10 on the moving path of the boss, so that the clip 3 can be locked in the clamping state through the limiting effect of the locking platform 10 on the boss. This method is easy to operate, has a good clamping effect, and will not produce additional foreign matter, and will not cause trouble to patients and medical staff.

[0051] Combined with Fig. 9 and attached Fig.10In a preferred embodiment, the clamping member 33 is a three-dimensional boss, and a guide surface 120 is provided on the three-dimensional boss, and the guide surface 120 is used to abut against the locking platform 10. In this way, the guide surface 120 is generally an inclined surface or a curved surface, and the guide surface 120 on the three-dimensional boss can play a guiding role, so that the clamping member 33 can more easily pass over the locking platform 10 from the release side 101 and fall into the locking groove 13.

[0052] 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 the guide groove 14 is 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 further affect the matching effect between the locking platform 10 and the clip 33. The widths of the guide groove 14 and the locking groove 13 should be designed according to actual needs.

[0053] Combined with 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 above principle, it can be known that the clip 33 at the tail of the clip 3 will move from the outside of the guide groove 14 to the release side 101 of the locking platform 10 when the clip 3 is closed, and will move from the release side 101 of the locking platform 10 to the outside along the guide groove 14 when the clip 3 is opened. Therefore, it is necessary to avoid the inner wall of the guide groove 14 from interfering with the clip 33, so the width of the guide groove 14 should be relatively wide. The locking groove 13 needs to limit the movement of the clip 33, and the movement of the clip 33 is limited by the inner wall of the locking groove 13 and the locking platform 10 abutting against the clip 33. Therefore, the width of the locking groove 13 is relatively narrow, and the size of the locking groove 13 can be designed to allow the clip 33 to slide in without unnecessary sliding.

[0054] For the clip 3 in this embodiment, the clamping teeth 36 and the clamping boss 37 provided on the clamping arm 35 can further enhance the clamping effect of the clamping mechanism on the lesion wound surface, that is, the bite effect on the wound surface is better. At the same time, this design can also make the clamping mechanism have a better clamping effect.

[0055] Also, during the hemostatic clip closure operation, the clamp mechanism needs to be sent to the vicinity of the lesion wound along the endoscope clamp channel, combined with the attached Fig.15 If there are clamping teeth 36 and clamping bosses 37, the width of the clamping head end may be too large even if the clamp 3 is in a fully closed state, making it difficult to insert into the endoscope. Figure 7 and attached Fig.16In this embodiment, the clamp arm 35 is inclined toward the side where the clamping teeth 36 are located. At this time, when the clamp 3 is in a fully closed state, the width of the end of the clamp mechanism will be greatly reduced, so that the clamp mechanism is more convenient to insert into the endoscope channel. In a preferred embodiment, the inclination angle A of the clamp arm 35 is 0° to 30°.

[0056] In addition, combined with Figure 8 , Attachment Fig. 9 and attached Fig.16 In another improved embodiment, the clamping bosses 37 on the two clips 3 are arranged alternately. Compared with the clamping bosses 37 on the two clips 3 directly abutting against each other, which will hinder the closing, in this embodiment, when the clips 3 are closed, the width of the end of the clamp mechanism will not increase too much because the clamping bosses 37 are staggered, which is more conducive to the insertion of the clamp mechanism into the endoscope clamp channel.

[0057] According to the operation process of the clamping method, when the hemostatic clip completes the clamping of the lesion wound, only the clamping head part should be retained, that is, the clamping head mechanism needs to be separated from the rest of the hemostatic clip. In this embodiment, first, the push-pull rod 2 and the clip 3 need to be disconnected, that is, the push-pull rod 2 is detachably connected to the two clips 3 through two connecting pieces 9.

[0058] Therefore, combined with the Figure 2 And attached Fig.11 To Attachment Fig.14 In a preferred embodiment, a first connecting shaft 21 is provided on one of the connected clip 3 and the connecting piece 9, and a first connecting hole 31 is opened on the other, and the first connecting shaft 21 is rotatably matched with the first connecting hole 31; a second connecting shaft 22 is provided on one of the connected connecting piece 9 and the push-pull rod 2, and a second connecting hole 32 is opened on the other, and the second connecting shaft 22 is rotatably matched with the second connecting hole 32; a disengagement groove 30 connected to the outside is opened on the first connecting hole 31 or the second connecting hole 32, and the passing size of the disengagement groove 30 is smaller than the diameter of the corresponding first connecting shaft 21 or the second connecting shaft 22.

[0059] This embodiment can be combined with the linear motion of the push-pull rod 2 to achieve the separation between the push-pull rod 2 and the clamping piece 3 after the clamping mechanism completes the clamping and locking. For the working form of achieving separation between the push-pull rod 2 and the clamping piece 3, its working principle needs to be explained in combination with the specific structural form.

[0060] The following is an example of a specific implementation: one of the connected clip 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. It can be understood that the first connecting shaft 21 can be provided on the clip 3, and the first connecting hole 31 is correspondingly provided on the connecting piece 9. Similarly, the first connecting shaft 21 can also be provided on the connecting piece 9, and the first connecting hole 31 is correspondingly provided on the clip 3. In short, the connected clip 3 and the connecting piece 9 form a movable connection through the form of shaft-hole matching, that is, hinged.

[0061] 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, and the second connecting shaft 22 is rotatably matched with the second connecting hole 32. Similar to the connection form between the clip 3 and the connecting piece 9, the second connecting shaft 22 and the second connecting hole 32 are correspondingly configured to form a hinge. In this embodiment, the arrangement form of the second connecting shaft 22 and the second connecting hole 32 is not unique, and the second connecting hole 32 is set on the push-pull rod 2 as an example. There is only one disengagement groove 30, and in this embodiment, it is set only on the second connecting hole 32 as an example.

[0062] It can be understood that in this structural form, when the disengagement slot 30 is not deformed by force, since the passing dimension of the disengagement slot 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.

[0063] Further, based on the structural form described above, the working principle of the push-pull rod 2 and the clip 3 to achieve separation is as follows: when the push-pull rod 2 moves linearly in the direction away from the clip 3, the clip 3 will be fully closed and locked. The locking process is referred to in the previous text. After the clip 3 is locked, the movement trend of the push-pull rod 2 will continue. The second connecting hole 32 will form a relative movement with the second connecting shaft 22. The second connecting shaft 22 will apply a force to the second connecting hole 32. Due to the existence of the disengagement groove 30, the second connecting hole 32 will gradually deform until the second connecting shaft 22 is fully disengaged from the second connecting hole 32. At this time, since the disengagement groove 30 is located on the push-pull rod 2, the push-pull rod 2 can be taken out of the human body along with the rest of the hemostatic clip, and the connecting seat 1, the two connecting pieces 9 and the two clips 3 can be left in the human body.

[0064] In addition to the above-described structural forms, the disengagement 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 achieve the disengagement of the second connecting shaft 22. Alternatively, in other structural forms, the disengagement groove 30 can also be provided on the first connecting hole 31, and the first connecting hole 31 can be provided on the clip 3 or the connecting piece 9. In this case, the push-pull rod 2 and the connecting piece 9 are not disengaged, but the connecting piece 9 and the clip 3 can be disengaged, and the connecting piece 9 and the push-pull rod 2 can leave the human body with the rest of the hemostatic clip.

[0065] Based on the structural form and working principle described above, it can be known that the clamp mechanism of this embodiment improves the driving mode of the clamp 3 and uses 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, which enables the clamp 3 to push the human tissue as far as possible when it is blocked. In addition, when the clamp mechanism is released, no foreign matter such as debris will be generated, and no additional trouble will be caused to medical staff and patients.

[0066] It can be understood that since the disengagement groove 30 is a key structure for realizing the disengagement of the push-pull rod 2, the connecting piece 9 and the clip 3, the passing size of the disengagement groove 30 is also particularly critical. In a preferred embodiment, the width of the disengagement 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, the connecting piece 9 and the clip 3 when they are normally connected, and can smoothly realize the disengagement of the push-pull rod 2, the connecting piece 9 and the clip 3.

[0067] Furthermore, since the connecting piece 9, the clamping piece 3 and the push-pull rod 2 are connected by an axial hole in the present technical solution, the setting positions of the first connecting shaft 21 and the first connecting hole 31 can be flexibly adjusted during actual production. Similarly, the setting positions of the second connecting shaft 22 and the second connecting hole 32 can also be flexibly adjusted. In this way, the structural combination of the connecting piece 9, the clamping piece 3 and the push-pull rod 2 can have a certain degree of replaceability, have higher flexibility in the production stage, and have a higher tolerance to the supply chain, thereby improving production efficiency.

[0068] In addition, combined with Figure 6In a further embodiment, a guide hole 11 is provided on the connection seat 1, and the two clips 3 are respectively connected to the push-pull rod 2 through two connecting pieces 9 passing through the guide holes 11; the guide hole 11 is tapered, and the tapered guide hole 11 gradually converges from one side close to the clip 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. In this embodiment, the connecting piece 9 and the guide rod are connected to the clip 3 after passing through the guide hole 11. In the process of the connecting piece 9 driving the clip 3 to move, the movement form of the connecting piece 9 is a composite movement of translation and swinging, and it is inevitable that it will contact the inner wall of the guide hole 11. Therefore, in this embodiment, the guide hole 11 is set to be tapered, and the guide slope 110 formed on the inner wall of the tapered guide hole 11 can follow the movement trend of the connecting piece 9 to avoid interference, thereby ensuring the opening and closing effect of the clip 3. In addition, 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 during the process of the connecting piece 9 being retracted with the push-pull rod 2, so that the two connecting pieces 9 are naturally converged, thereby being able to pass through the connecting seat 1 more easily and complete the recovery.

[0069] Since the current chuck mechanism, the material of the clip 3 and other parts thereof is mostly made of metal materials such as stainless steel, the chuck mechanism itself may contain magnetism, which makes it impossible for patients who have undergone endoscopic minimally invasive treatment to undergo MRI examination in a short period of time and to pass security inspection when traveling. Therefore, in a preferred embodiment, the clip 3, the connecting seat 1 and the connecting piece 9 are preferably made of non-magnetic elastic material or non-magnetic absorbable material. Specifically including pure titanium, magnesium alloy, zinc alloy, polylactic acid, polyglycolide, polyglycolide-trimethylene carbonate, polyetheretherketone, polyamide, polyoxymethylene, ultra-high molecular weight polyethylene, polycarbonate, etc. In a preferred embodiment, pure titanium or polyetheretherketone material can be selected as needed. In this way, it can be ensured that when the chuck mechanism remains in the human body, it can be compatible with MRI examination, that is, it has no effect on the patient's magnetic resonance examination and no effect on passing security inspection.

[0070] Example 2

[0071] Combined with Fig.17 To Attachment Fig. 20This embodiment proposes a hemostatic clip, including a chuck mechanism of embodiment 1, and further including a swivel seat 4, a first swivel 5, a second swivel 6 and a hook 7. The swivel seat 4 is located at one side of the connecting seat 1, and a limit platform 40 is fixedly provided on the swivel seat 4. The first swivel 5 is located in the swivel seat 4, and both ends of the first swivel 5 are respectively in contact with the limit platform 40. The outer wall of the second swivel 6 is fixedly connected to the inner wall of the first swivel 5, and an extension boss 60 is fixedly provided on the second swivel 6, and a first release hole 61 is provided on the extension boss 60. The connecting seat 1 is provided with a second release hole 12, and a hook 71 is fixedly provided at the end of the hook 7, and the hook 71 passes through the first release hole 61 and is plugged into the second release hole 12.

[0072] The chuck mechanism proposed in Example 1 realizes the connection and separation between the clip 3 and the push-pull rod 2. However, if the chuck mechanism is to be separated from the rest of the hemostatic clip, the connection base 1 must also be separated from the rest of the hemostatic clip. This embodiment can realize the connection and release of the chuck mechanism and the rest of the hemostatic clip.

[0073] The working principle of the present embodiment to achieve the connection and release between the chuck mechanism and the rest of the hemostatic clamp is as follows: the swivel seat 4, the first swivel 5, the second swivel 6 and the hook 7 are all components of the hemostatic clamp. The swivel seat 4 assembles the first swivel 5 inside it through the limit table 40, but still ensures that the first swivel 5 can rotate. The inner wall of the first swivel 5 and the outer wall of the second swivel 6 are fixedly connected by welding or bonding, or integrally formed. The hook claw 71 on the hook 7 simultaneously passes through the first release hole 61 on the extension boss 60 and the second release hole 12 on the connecting seat 1 to achieve the connection between the second swivel 6 and the connecting seat 1. In this way, the connection between the rest of the hemostatic clamp and the chuck mechanism is achieved.

[0074] The release process of the chuck mechanism is after the separation process of the push-pull rod 2 and the clip 3. When the push-pull rod 2 is disconnected from the connecting piece 9, or when the push-pull rod 2 is connected to the connecting piece 9 but the connecting piece 9 is disconnected from the clip 3, the push-pull rod 2 or the push-pull rod 2 together with the connecting piece 9 moves along the axial direction of the connecting seat 1 until it abuts against the hook 7 and exerts a force on the hook 7. This force causes the claw 71 to be separated from the second release hole 12 on the connecting seat 1. Obviously, since the chuck mechanism only relies on the cooperation between the first release hole 61 and the second release hole 12 and the claw 71 to achieve connection with the rest of the hemostatic clip, when the claw 71 is separated from the second release hole 12, the chuck mechanism except the push-pull rod 2 (or except the push-pull rod 2 and the connecting piece 9) can be released and retained in the human body to clamp the lesion wound surface, while the swivel seat 4, the first swivel 5, the second swivel 6 and the hook 7 and other components can leave the human body with the main body of the hemostatic clip. Thereby, the remaining part of the hemostatic clip is separated from the clamp mechanism.

[0075] In a further embodiment, the hemostatic clip further comprises a handle 80, a sliding handle 81, a rotating wheel 82, a plastic-coated spring tube 88 and a core shaft 83; a finger ring 84 is provided at the end of the handle 80, and a through hole 72 is also provided on the hook 7. The plastic-coated spring tube 88 is sleeved on the outside of the core shaft 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 arranged on the handle 80, one end of the core shaft 83 is fixedly connected to the sliding handle 81 through a fixed tube 85, and the other end of the core shaft 83 is fixedly connected to the push-pull rod 2 through the through hole 72. The rotating wheel 82 is rotatably connected to the handle 80, a flat position is provided inside the rotating wheel 82, and the core shaft 83 passes through the flat position and is clamped with the flat position through a guide tube 87.

[0076] The sliding handle 81 and the core shaft 83 and other related structures in this embodiment constitute a pulling mechanism that can drive the push-pull rod 2 to move axially, that is, the sliding of the sliding handle 81 relative to the handle 80 can drive the push-pull rod 2 to move axially through the core shaft 83, thereby realizing the opening and closing, closing and locking, and disengagement and release operations of the chuck mechanism. The fixed connection between the core shaft 83 and the push-pull rod 2 can be achieved by various connection forms, such as interference fit between the shaft holes, bonding or welding, etc.

[0077] The rotating wheel 82 can transmit its rotation to the clip 3 through the cooperation of the inner flat part and the core shaft 83, thereby controlling the rotation of the clip 3. The finger ring 84 at the end of the handle 80 can improve the convenience of operation of the hemostatic clip and can meet more gripping methods.

[0078] The above is a schematic description of the present invention and its implementation methods, which is not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and creatively designs a structure and an embodiment similar to the technical solution without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A chuck mechanism, characterized in that: It comprises a connecting seat (1), a push-pull rod (2), two connecting pieces (9) and two clamping pieces (3); The two clips (3) intersect, and the intersection is hinged to the connecting seat (1), and the push-pull rod (2) is detachably connected to the two clips (3) through the two connecting pieces (9); The clamping piece (3) comprises a clamping arm (35), a clamping tooth (36) is fixedly provided on the clamping arm (35), 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; The clip (3) is provided with a clamping piece (33), and the connecting seat (1) is provided with a locking portion for limiting the movement of the clamping piece (33), and the two locking portions corresponding to the two clips (3) are centrally symmetrically arranged on the connecting seat (1); The locking portion comprises 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 a release side (101); the side of the locking platform (10) facing the locking groove (13) is a locking side (102); and the clamping member (33) is used to abut against the release side (101) and the locking side (102).

2. A chuck mechanism according to claim 1, characterized in that: The clamping member (33) is a three-dimensional boss, and a guide surface (120) is provided on the three-dimensional boss. The guide surface (120) is used to abut against the locking platform (10).

3. A chuck mechanism according to claim 1, characterized in that: The width of the guide groove (14) is not equal to the width of the locking groove (13).

4. A chuck mechanism according to claim 1, characterized in that: One of the connected clip (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), and the first connecting shaft (21) is rotatably matched with the first connecting hole (31); 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), and the second connecting shaft (22) is rotatably matched with the second connecting hole (32); the first connecting hole (31) or the second connecting hole (32) is provided with a disengagement groove (30) connected to the outside, and the passing size of the disengagement groove (30) is smaller than the diameter of the corresponding first connecting shaft (21) or the second connecting shaft (22).

5. A chuck mechanism according to claim 4, 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) in a transmission manner via two connecting pieces (9) penetrating the guide holes (11); the guide hole (11) is tapered, and the tapered guide hole (11) gradually converges from one side close to the clamping piece (3) to the other side to form a guide inclined surface (110), and the guide inclined surface (110) is used to abut against the connecting piece (9) or the push-pull rod (2).

6. A chuck mechanism according to claim 1, characterized in that: The inclination angle A of the clamping arm (35) is 0° to 30°.

7. A chuck mechanism according to claim 1, characterized in that: The clamping bosses (37) located on the two clamping arms (35) are arranged in a staggered manner.

8. A chuck mechanism according to any one of claims 1 to 7, characterized in that: The clip (3), the connecting seat (1) and the connecting piece (9) are made of non-magnetic elastic material or non-magnetic absorbable material.

9. A hemostatic clip, comprising a clamping mechanism according to any one of claims 1 to 8, characterized in that: It also includes a swivel seat (4), a first swivel (5), a second swivel (6) and a hook (7); The swivel seat (4) is located at one side of the connecting seat (1), a limiting platform (40) is fixedly arranged on the swivel seat (4), the first swivel (5) is located in the swivel seat (4), and two ends of the first swivel (5) are respectively in contact with 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); 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 plugged into the second release hole (12).

10. A hemostatic clip according to claim 9, characterized in that: It also includes a handle (80), a sliding handle (81), a rotating wheel (82), a plastic-coated spring tube (88) and a core shaft (83); a finger ring (84) is provided at the end of the handle (80), and a through hole (72) is also provided on the hook (7); The plastic-coated spring tube (88) is sleeved on the outer side of the core shaft (83), one end of the plastic-coated spring tube (88) is fixedly connected to the end of the handle (80), the other end of the plastic-coated spring tube (88) is fixedly connected to the swivel seat (4), the sliding handle (81) is slidably arranged on the handle (80), one end of the core shaft (83) is fixedly connected to the sliding handle (81) through a fixing tube (85), and the other end of the core shaft (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), a flat position is arranged inside the rotating wheel (82), and the core shaft (83) passes through the flat position and is clamped with the flat position through a guide tube (87).

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