A chuck mechanism and a hemostatic clip

Abstract

The present invention relates to the technical field of hemostatic clips, and particularly to a chuck mechanism and a hemostatic clip. Aiming at the technical problems existing in the existing hemostatic clips, the present invention provides a chuck mechanism and a hemostatic clip, which improve the structure of the clip. An integrated hole in the form of a tee is opened at the tail of the clip, and the integrated hole is cooperatively connected with the ball head of the wire, so as to combine the clamping control of the clip and the disengagement control between the wire and the clip, and can avoid the mutual influence between the clamping operation and the disengagement operation of the clip during the operation. Moreover, through the design of the multi-stage locking part, the clip can be locked at different clamping degrees to meet the clamping requirements in different situations, and has better practicability and operation convenience.

Description

Technical Field

[0001] The present invention relates to the technical field of hemostatic clips, and particularly relates to a chuck 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 method for current digestive tract bleeding treatment. Currently, commonly used endoscopic hemostasis methods include laser coagulation method, electrocoagulation method, local injection drug hemostasis method, drug spraying method, suture clip clamping method, etc. Among them, the hemostatic clip clamping method has become an effective and clinically applicable method for non-surgical treatment of digestive tract bleeding due to its characteristics such as small trauma, fast hemostasis speed, low incidence of rebleeding, few complications, and definite curative effect.

[0003] Currently, the hemostatic clips circulating on the market are mainly divided into two types: chute type and elastic sheet type. Both types of hemostatic clips are composed of a clamp tube, clip pieces, and a retaining pin. For example, the technical solution with the publication number CN118356226A discloses "a chuck assembly and a hemostatic clip for use with an endoscope". In this technical solution, the driving action of the first hook on the clip piece and the detachment action of the first hook from the clip piece are realized by the cooperation of the first hook claw on the first hook with the first hook mounting hole, tearing groove, and release hanging platform deformation hole on the clip piece. In this way, the first hook claw needs to first connect with the first hook mounting hole, and then destroy the tearing groove so that the first hook mounting hole and the release hanging platform deformation hole are communicated, so that the first hook claw has enough detachment space.

[0004] However, in this design, on the one hand, the first hook claw needs to control the clamping of the clip piece when it is not detached, and on the other hand, it needs to destroy the tearing groove and slide into the release hanging platform deformation hole when it is detached. This results in complex movement behavior of the first hook. Reflected in the surgical operation, the control difficulty is large, and it is easy to cause misoperation by the surgical operator. Moreover, this method requires two through holes, namely the first hook mounting hole and the release hanging platform deformation hole, to be set on the first hook with an extremely small volume, which greatly reduces the strength of the tail of the clip piece. Although there is a tearing groove initially set between the first hook mounting hole and the release hanging platform deformation hole, the structure strength of this tearing groove is not high to ensure the tearing effect, nor can it ensure the strength of the tail of the clip piece, and it is easy to cause deformation or damage of the clip piece during use, thus affecting the surgical operation.

[0005] Obviously, the current structural design of the hemostatic clip does not achieve a good integration of the clamping operation and the detachment operation. The structure for realizing the clamping operation and the structure for realizing the detachment operation often affect each other, resulting in misoperation during the surgery.

[0006] Also, similar hemostatic clips as described in the above documents, although the clamping head portion can be locked after clamping, this locking after clamping can only be achieved when the clamping head portion is at a certain clamping degree, or in other words, only when the clamping head portion is closed to a certain degree can the locking at the clamping degree be achieved. This design has certain defects, because when the clamping head portion clamps and stops bleeding on lesions of different sizes, the closing degree of the clamping head portion is different, while when the clamping head portion is in a locked state, its closing degree is fixed, and there will be a conflict at this time.

[0007] For example, if a smaller volume of diseased tissue needs to be clamped, the clamp part needs to be more tightly closed. However, since the clamp part of the hemostatic clip can only be locked at a certain clamping degree, the clamp part may not be closed enough, and the clamping force cannot be guaranteed, so that the smaller volume of diseased tissue cannot be fully clamped, thereby affecting the effect of clamping and hemostasis. If a larger volume of diseased tissue needs to be clamped, the clamp part does not need to be particularly tightly closed, that is, the opening of the clamp part needs to be relatively larger to accommodate a larger volume of diseased tissue. However, since the clamp part of the hemostatic clip can only be locked at a certain clamping degree, the clamp part may not be closed to the required degree of locking, that is, it cannot ensure that the larger volume of diseased tissue is fully clamped. If clamped forcibly, the clamping force will be too large, which may cause the clamp part to bounce or deform, thereby affecting the effect of clamping and hemostasis. Summary of the invention

[0008] In view of the technical problems of defects in existing hemostatic clips, the present invention provides a clamp mechanism and a hemostatic clip, which improves the structure of the clip, opens a three-way integrated hole at the tail of the clip, and the integrated hole is connected with the ball head of the metal wire, so as to combine the clamping control of the clip and the separation control between the metal wire and the clip, which can avoid the clamping operation and the separation operation of the clip from affecting each other during surgery. In addition, through the design of a multi-level locking part, the clip can be locked at different clamping degrees to meet the clamping requirements of different situations, and has better practicality and convenience of operation.

[0009] Technical Solution

[0010] To solve the above problems, the technical solution provided by the present invention is: a chuck mechanism, including a connecting seat, a metal wire, and two clamping pieces; the two clamping pieces intersect, and the intersection is hinged to the connecting seat. The clamping piece includes a clamping arm, on which clamping teeth are fixedly arranged, and a clamping boss is fixedly arranged at the end of the clamping arm. The clamping arm inclines towards the side where the clamping teeth are located; a deformation hole and a connection hole are arranged at the tail of the clamping piece. The deformation hole and the connection hole communicate to form an integral hole in a tee form, so that a first deformation wall and a second deformation wall are formed at the tail of the clamping piece; a guiding hole is arranged on the connecting seat, and the metal wire passes through the guiding hole. The metal wire includes two connecting segments, and ball heads are fixedly arranged at the ends of the two connecting segments. The diameter of the ball head is larger than the passing size of the connection hole, and the diameter of the ball head is smaller than the passing size of the deformation hole; the two connecting segments respectively pass through the connection holes on the two clamping pieces, and the ball head is located in the deformation hole; a termination locking platform is fixedly arranged on the clamping piece near the connection hole. The termination locking platform includes a cut-off side and a non-cut-off side; limiting locking platforms are arranged on both sides of the connecting seat. The limiting locking platform includes a limiting side and a non-limiting side; the non-cut-off side is used to abut against the non-limiting side, and the cut-off side is used to abut against the limiting side; a multi-stage locking part is arranged on the clamping piece or the connecting seat, and the multi-stage locking part is used to lock the clamping piece at different positions; when the multi-stage locking part is arranged on the clamping piece, the multi-stage locking part is located on the side where the non-cut-off side of the termination locking platform is located, and the multi-stage locking part is used to abut against the limiting locking platform; when the multi-stage locking part is arranged on the connecting seat, the multi-stage locking part is located on the side where the non-limiting side of the limiting locking platform is located, and the multi-stage locking part is used to abut against the termination locking platform.

[0011] Optionally, when the multi-stage locking part is arranged on the clamping piece, the multi-stage locking part includes n sub-level locking platforms, and the n sub-level locking platforms are continuously arranged along the non-cut-off side away from the cut-off side; between the n sub-level locking platforms, and between the termination locking platform and the adjacent sub-level locking platform, a cut-off groove is formed, and the cut-off groove is used to be clamped with the limiting locking platform; where n≥1 and n∈N.

[0012] Optionally, the volume of the sub-level locking platform is less than or equal to the volume of the termination locking platform.

[0013] Optionally, when the multi-stage locking part is arranged on the connecting seat, the multi-stage locking part includes i sub-level limiting platforms, and the i sub-level limiting platforms are continuously arranged along the non-limiting side away from the limiting side; between the i sub-level limiting platforms, and between the sub-level limiting platform and the adjacent limiting locking platform, a limiting groove is formed, and the limiting groove is used to be clamped with the termination locking platform; where i≥1 and i∈N.

[0014] Optionally, the volume of the sub-level limiting platform is less than or equal to the volume of the limiting lock platform.

[0015] Optionally, the inclination angle A of the clamping arm is 0° to 30°.

[0016] Optionally, the clamping bosses located on the two clamping arms are arranged staggeredly.

[0017] Optionally, the clamping piece and the connecting seat are made of non-magnetic elastic material or non-magnetic absorbable material.

[0018] A hemostatic clip includes the above-mentioned clamping head mechanism, and further includes a swivel base, a first swivel, a second swivel and a hook; the swivel base is located on one side of the connecting seat, a limiting platform is fixedly arranged on the swivel base, the first swivel is located inside the swivel base, and both ends of the first swivel are abutted against the limiting platform respectively; the outer wall of the second swivel is fixedly connected to the inner wall of the first swivel, an extension boss is fixedly arranged on the second swivel, a first release hole is arranged on the extension boss, a second release hole is arranged on the connecting seat, a hanging claw is fixedly arranged at the end of the hook, and the hanging claw passes through the first release hole and is inserted into the second release hole.

[0019] Optionally, it further includes a handle, a sliding handle, a runner, a mandrel and a plastic-coated spring tube; a finger ring is arranged at the end of the handle, and a through hole is arranged on the hook; the plastic-coated spring tube is sleeved outside the mandrel, one end of the plastic-coated spring tube is fixedly connected to the end of the handle, the other end of the plastic-coated spring tube is fixedly connected to the swivel base, the sliding handle is slidably arranged on the handle, one end of the mandrel is fixedly connected to the sliding handle through a fixed tube, the other end of the mandrel passes through the through hole and is fixedly connected to the wire through a connecting tube; the runner is rotatably connected to the handle, a flat position is arranged inside the runner, and the mandrel passes through the flat position and is clamped with the flat position through a catheter.

[0020] Beneficial effects

[0021] Adopting the technical solution provided by the present invention, compared with the prior art, it has the following beneficial effects: aiming at the technical problem of defects existing in the existing hemostatic clips, a clamping head mechanism and a hemostatic clip proposed by the present invention improve the structure of the clamping piece, and an integrated hole in the form of a tee is opened at the tail of the clamping piece. The integrated hole is cooperatively connected with the ball head of the wire, so as to combine the clamping control of the clamping piece and the disengagement control between the wire and the clamping piece, which can avoid the mutual influence between the clamping operation and the disengagement operation of the clamping piece during the operation, reduce the complexity of the movement of the wire, and improve the operability of the hemostatic clip.

[0022] Particularly importantly, through the design of the multi-level locking parts, the present invention can achieve the locking of the clamping piece at different clamping degrees to meet the clamping requirements in different situations, and has better practicability and operation convenience.

[0023] In addition, in this technical solution, the deformation hole and the connection hole are designed as a tee-shaped integral hole, which can not only avoid the influence on the strength of the clamping piece caused by opening multiple holes and prevent the clamping piece from deforming or even being damaged during use, but also ensure that the first deformation wall and the second deformation wall have sufficient deformation amounts to meet the locking action of the clamping piece and the detachment action of the metal wire from the clamping piece.

[0024] In addition, this structural form of the integral hole can greatly reduce the processing difficulty, without particularly considering the relative positioning relationship between the deformation hole and the connection hole, and the precision requirements for design and manufacturing can be greatly reduced.

[0025] In addition, this technical solution will not generate foreign matters such as debris, avoiding the potential uncertainties caused by foreign matters remaining in the patient's body and also avoiding the additional operation of removing foreign matters during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. 1 is one of the structural schematic diagrams of the chuck mechanism proposed by the embodiment of the present invention.

[0027] Figure 2 FIG. 2 is one of the structural schematic diagrams of the clamping piece proposed by the embodiment of the present invention.

[0028] Figure 3 FIG. 3 is another structural schematic diagram of the clamping piece proposed by the embodiment of the present invention.

[0029] Figure 4 FIG. 4 is yet another structural schematic diagram of the clamping piece proposed by the embodiment of the present invention.

[0030] Figure 5 FIG. 5 is still another structural schematic diagram of the clamping piece proposed by the embodiment of the present invention.

[0031] Figure 6 FIG. 6 is one of the structural schematic diagrams of the connecting seat proposed by the embodiment of the present invention.

[0032] Figure 7 FIG. 7 is another structural schematic diagram of the connecting seat proposed by the embodiment of the present invention.

[0033] Figure 8 FIG. 8 is yet another structural schematic diagram of the connecting seat proposed by the embodiment of the present invention.

[0034] Figure 9 FIG. 9 is one of the mating schematic diagrams of the chuck mechanism proposed by the embodiment of the present invention.

[0035] Figure 10The second mating schematic diagram of the chuck mechanism proposed in the embodiment of the present invention.

[0036] Figure 11 The second structural schematic diagram of the chuck mechanism proposed in the embodiment of the present invention.

[0037] Figure 12 The third structural schematic diagram of the chuck mechanism proposed in the embodiment of the present invention.

[0038] Figure 13 The structural schematic diagram of the first swivel ring proposed in the embodiment of the present invention.

[0039] Figure 14 The structural schematic diagram of the second swivel ring proposed in the embodiment of the present invention.

[0040] Figure 15 The structural schematic diagram of the hook proposed in the embodiment of the present invention.

[0041] Figure 16 The structural schematic diagram of the hemostatic clip proposed in the embodiment of the present invention.

[0042] Figure 17 The first working schematic diagram of the hemostatic clip proposed in the embodiment of the present invention.

[0043] Figure 18 The second working schematic diagram of the hemostatic clip proposed in the embodiment of the present invention. Detailed implementation manners

[0044] To further understand the content of the present invention, the present invention will be described in detail with reference to the accompanying drawings and embodiments.

[0045] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. In addition, it should be noted that for the sake of description, only the parts related to the invention are shown in the drawings. The terms "first", "second", etc. used in the present invention are set for the convenience of describing the technical solution of the present invention, and have no specific limiting effect, and are all general references, and do not constitute a limiting effect on the technical solution of the present invention. It should be noted that, without 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 positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and 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", "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 "mounted", "connected", "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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. 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 have contradictions or conflicts, and are all within the scope of protection required by the present invention.

[0046] In combination with the attached Figure 1 to the attached Figure 12 , this embodiment proposes a chuck mechanism, which includes a connecting seat 1, a metal wire, and two clamping pieces 3. The two clamping pieces 3 intersect, and the intersection is hinged to the connecting seat 1. The clamping piece 3 includes a clamping arm 35. A clamping tooth 36 is fixedly arranged on the clamping arm 35. A clamping boss 37 is fixedly arranged at the end of the clamping arm 35. The clamping arm 35 inclines towards the side where the clamping tooth 36 is located.

[0047] The tail of the clip 3 is provided with a deformation hole 31 and a connection hole 32. The deformation hole 31 and the connection hole 32 communicate with each other to form an integral hole in a tee form, so that the tail of the clip 3 forms a first deformation wall 33 and a second deformation wall 34. A guiding hole 11 is provided on the connection seat 1. A metal wire penetrates through the guiding hole 11. The metal wire includes two connecting segments 20. Ball heads 23 are fixedly arranged at the ends of the two connecting segments 20. The diameter of the ball head 23 is larger than the passing size of the connection hole 32, and the diameter of the ball head 23 is smaller than the passing size of the deformation hole 31. The two connecting segments 20 respectively penetrate through the connection holes 32 on the two clips 3, and the ball head 23 is located in the deformation hole 31.

[0048] A termination locking platform 30 is fixedly arranged on the clip 3 near the connection hole 32. The termination locking platform 30 includes a cut-off side 301 and a non-cut-off side 302. Limiting locking platforms 10 are arranged on both sides of the connection seat 1. The limiting locking platforms 10 include a limiting side 101 and a non-limiting side 102. The non-cut-off side 302 is used to abut against the non-limiting side 102, and the cut-off side 301 is used to abut against the limiting side 101.

[0049] Multi-stage locking parts are arranged on the clip 3 or the connection seat 1. The multi-stage locking parts are used to lock the clip 3 at different positions. When the multi-stage locking parts are arranged on the clip 3, the multi-stage locking parts are located on the side where the non-cut-off side 302 of the termination locking platform 30 is located, and the multi-stage locking parts are used to abut against the limiting locking platform 10. When the multi-stage locking parts are arranged on the connection seat 1, the multi-stage locking parts are located on the side where the non-limiting side 102 of the limiting locking platform 10 is located, and the multi-stage locking parts are used to abut against the termination locking platform 30.

[0050] The chuck mechanism of this embodiment is a component of a hemostatic clip. Its connection seat 1 needs to be connected to other parts of the hemostatic clip, and the metal wire also needs to be connected to the traction mechanism in the hemostatic clip. For the sake of simplicity of description, the remaining parts of the hemostatic clip are not elaborated in this embodiment. However, it should be noted that the metal wire will be pulled along the axial direction of the connection seat 1 under the traction of the traction mechanism in the hemostatic clip.

[0051] The working process of the chuck mechanism of this embodiment is divided into three processes: the opening and closing of the clip 3, the locking of the clip 3 when it is closed to different degrees, and the detachment of the metal wire from the clip 3 after the clip 3 is locked. Among them, the closing of the clip 3 and the detachment of the clip 3 from the metal wire are realized by the cooperation of the integral hole in a tee form formed by the communication between the deformation hole 31 and the connection hole 32 and the ball head 23 of the metal wire. The locking of the clip 3 when it is closed to different degrees is realized by the cooperation among the termination locking platform 30, the limiting locking platform 10 and the multi-stage locking parts. In short, the chuck mechanism of this embodiment combines the closing control and the detachment control of the clip 3 through the cooperation of the deformation hole 31 and the connection hole 32 with the ball head 23 at the end of the metal wire.

[0052] For the opening and closing process of the clamping piece 3, it mainly refers to the control of the opening and closing of the clamping piece 3. Its working principle is as follows: Push or pull the metal wire axially. Since the ball head 23 connecting the end of the connecting segment 20 is connected to the deformation hole 31 and the connecting hole 32, and the passing dimension of the connecting hole 32 is smaller than the diameter of the ball head 23, the clamping piece 3 will move with the movement of the metal wire, thereby realizing the opening and closing of the clamping piece 3.

[0053] During the operation of hemostasis by the clamping method, when the clamping piece 3 has clamped the diseased tissue, it is necessary to continuously maintain the clamping of the diseased tissue by the clamping piece 3. It can be imagined that in actual operation, since the volumes of the diseased tissues to be clamped by the clamping method are not the same, the opening sizes between the clamping pieces 3 are not the same, that is, the clamping degrees of the chuck mechanism are not the same. When clamping a diseased tissue with a larger volume, the opening size between the clamping pieces 3 will be relatively larger, and when clamping a diseased tissue with a smaller volume, the opening size between the clamping pieces 3 will be relatively smaller. Therefore, it involves the locking of the clamping piece 3 when maintaining a certain clamping degree.

[0054] The locking principle of the clamping piece 3 is closely related to the structure of the joint assembly, that is, closely related to the setting form of the multi-stage locking part, which is roughly divided into two cases: One is that the multi-stage locking part is located on the clamping piece 3, that is, multi-stage locking is achieved by the multi-stage locking part or the termination locking platform 30 on the clamping piece 3 abutting against the limit locking platform 10 on the connecting seat 1; the other is that the multi-stage locking part is located on the connecting seat 1, and multi-stage locking is achieved by the multi-stage locking part or the limit locking platform 10 on the connecting seat 1 abutting against the termination locking platform 30 on the clamping piece 3.

[0055] Taking the case where the multi-stage locking part is arranged on the clamping piece 3 as an example, in this implementation manner, the multi-stage locking part includes n sub-locking platforms 303, and the n sub-locking platforms 303 are continuously arranged in the direction away from the cut-off side 301 along the non-cut-off side 302; between the n sub-locking platforms 303, and between the termination locking platform 30 and the adjacent sub-locking platform 303, cut-off grooves 304 are formed, and the cut-off grooves 304 are used for clamping with the limit locking platform 10; where n≥1 and n∈N.

[0056] Based on this implementation, after the clip 3 clamps the diseased tissue, by continuously pulling the wire, the sub-level locking platform 303 comes into contact with and presses against the limit locking platform 10. Due to the existence of the deformation hole 31, the first deformation wall 33 and the second deformation wall 34 will fully deform, causing part of the sub-level locking platform 303 to cross over the limit locking platform 10. At this time, since the diseased tissue will exert a reaction force on the clip 3, at a certain clamping degree, the clip 3 cannot be pulled further. At this time, this sub-level locking platform 303 that has crossed over the limit locking platform 10 and is adjacent to the limit locking platform 10 will abut against the limiting side 101 of the limit locking platform 10. It can also be understood that at this time, the limit locking platform 10 is snapped into the corresponding cut-off groove 304, and at this time, the deformation hole 31 has also been reset, resulting in the clip 3 being unable to rotate and reset. At this time, the clamping head mechanism is locked at a certain opening degree.

[0057] Of course, if the volume of the diseased tissue to be clamped is large enough, it is also possible that only one sub-level locking platform 303 crosses over the limit locking platform 10 and then the clip 3 cannot rotate further. The locking principle in this case is the same as the previous case and will not be elaborated here. If the volume of the diseased tissue to be clamped is small enough, it is also possible that all n sub-level locking platforms 303 cross over the limit locking platform 10. At this time, the clip 3 is locked by the cooperation of the termination locking platform 30 and the limit locking platform 10. That is, the termination locking platform 30 also crosses over the limit locking platform 10, and the cut-off side 301 of the termination locking platform 30 abuts against the limiting side 101 of the limit locking platform 10, thereby achieving clamping and locking when the clip 3 is in the minimum closed state.

[0058] It can be conceived that the number of sub-level locking platforms 303 can be any number. Taking Figure 1 and Figure 2 and Figure 4 as examples, in the implementation manners of these drawings, there is only one sub-level locking platform. There is a cut-off groove 304 between one sub-level locking platform and one termination locking platform 30, which can provide an additional level of locking. Combining with the locking cooperation between the termination locking platform 30 and the limit locking platform 10, a total of two levels of locking can be achieved, that is, a total of two opening degrees of the clip 3 can be locked.

[0059] Generally speaking, the volume of the sub-level locking platform 303 can be the same as that of the termination locking platform 30. However, in order to ensure the clamping tightness as much as possible, the more sub-level locking platforms 303 cross over the limit locking platform 10. Therefore, in a more preferred implementation manner, the volume of the sub-level locking platform 303 can be smaller than that of the termination locking platform 30. In short, the volume of the sub-level locking platform 303 should be less than or equal to the volume of the termination locking platform 30.

[0060] It can be conceived that, similar to the principle of the above-described embodiment, the multi-stage locking portion may also be a plurality of grooves, a plurality of hooks 7 or other forms of clamping structures that are arranged continuously along the swinging direction of the clamping piece 3 at the tail of the clamping piece 3. In short, the multi-stage locking portion can ensure that when the clamping piece 3 swings to different amplitudes, the tail of the clamping piece 3 can cooperate with the limit locking platform 10 on the connecting seat 1, and rely on the clamping action between the multi-stage locking portion and the limit locking platform 10 to realize that the chuck mechanism can be locked at different clamping degrees.

[0061] Another embodiment takes the multi-stage locking portion being arranged on the connecting seat 1 as an example. In this embodiment, the multi-stage locking portion includes i sub-level limiting platforms 103, and the i sub-level limiting platforms 103 are arranged continuously in the direction away from the limiting side 101 along the non-limiting side 102; between the i sub-level limiting platforms 103, and between the sub-level limiting platforms 103 and the adjacent limit locking platforms 10, a limiting groove 104 is formed for clamping with the termination locking platform 30; where i≥1 and i∈N.

[0062] Similar to the form principle of the foregoing sub-level locking platform 303, in this embodiment, i sub-level limiting platforms 103 are provided on the connecting seat 1, and the clamping of the chuck mechanism at a certain opening degree is realized by the clamping of the termination locking platform 30 at the tail of the clamping piece 3 with the limiting groove 104 in this embodiment.

[0063] The specific principle is as follows: When the clamping piece 3 rotates, due to the existence of the deformation hole 31, the termination locking platform 30 will cross one or several sub-level limiting platforms 103. When at an appropriate clamping degree, due to the reaction force exerted by the diseased tissue on the clamping piece 3, the clamping piece 3 cannot continue to swing. At this time, the termination locking platform 30 will snap into a corresponding limiting groove 104, restricting the movement of the clamping piece 3 and preventing it from rotating and resetting. Snapping into different limiting grooves 104 means that the chuck mechanism is locked at different opening degrees at this time.

[0064] Similar to the foregoing embodiment, if the volume of the diseased tissue to be clamped is small enough, it is also possible for the termination locking platform 30 to cross all i sub-level limiting platforms 103. At this time, the clamping of the clamping piece 3 is also realized through the cooperation of the termination locking platform 30 and the limit locking platform 10. That is, the termination locking platform 30 will finally cross the limit locking platform 10, and the cut-off side 301 of the termination locking platform 30 will abut against the limiting side 101 of the limit locking platform 10, thereby realizing the clamping and locking when the clamping piece 3 is in the minimum closed state.

[0065] It can be conceived that the number of the sub-level limiting platforms 103 can be any number for attachment Figure 6 and attachment Figure 7For example, in the embodiments of these drawings, there is only one sub-level limiting platform 103. There is a limiting groove 104 between one sub-level limiting platform 103 and one limiting lock platform 10, which can provide an additional level of locking. Cooperating with the locking fit between the termination lock platform 30 and the limiting lock platform 10, a total of two levels of locking can be achieved, that is, a total of two locking states of the two opening degrees of the clip 3 can be achieved.

[0066] Generally speaking, the volume of the sub-level limiting platform 103 can be the same as that of the limiting lock platform 10. However, in order to ensure the clamping tightness as much as possible, the termination lock platform 30 needs to cross as many sub-level limiting platforms 103 as possible. Therefore, in a more preferred embodiment, the volume of the sub-level limiting platform 103 can be smaller than that of the limiting lock platform 10. In short, the volume of the sub-level limiting platform 103 is less than or equal to the volume of the limiting lock platform 10.

[0067] Combining the different embodiments of the above two multi-level locking parts, it can be seen that the limit stroke of the clip 3 when it is not locked is the position of the clip 3 when the multi-level locking part on the clip 3 just abuts against the non-limiting side 102 of the limiting lock platform 10, or the position of the clip 3 when the multi-level locking part on the connecting seat 1 just abuts against the non-cut-off side 302 of the termination lock platform 30.

[0068] The separation of the wire from the clip 3 occurs after the clip 3 is in the locked state. The principle is that when the wire is continuously pulled, since the clip 3 cannot move further at this time, the ball head 23 will continue to apply a force to the first deformation wall 33 and the second deformation wall 34. The first deformation wall 33 and the second deformation wall 34 will continue to deform until the passing size of the connecting hole 32 is greater than the diameter of the ball head 23, and the ball head 23 is thus pulled out, and the wire and the clip 3 are also separated accordingly. Subsequently, the wire will pass through the guiding hole 11 and leave the chuck mechanism. At this time, the remaining parts of the chuck mechanism except the wire will remain in the human body to ensure the clamping of the diseased wound surface.

[0069] For the clamping process of the above clip 3, the main purpose is to achieve the clamping of the diseased wound surface. In order to ensure the clamping effect on the diseased wound surface, the clip 3 of this embodiment is provided with clamping teeth 36 and clamping bosses 37. By setting the clamping teeth 36 and clamping bosses 37, the clamping effect of the chuck mechanism on the diseased wound surface can be further improved. At the same time, this design can also make the chuck mechanism have a better clamping effect.

[0070] Based on the above description, it can be known that compared with the prior art, the clamping mechanism proposed in this embodiment improves the structure of the clip 3, and opens an integrated hole in the form of a three-way at the tail of the clip 3. The integrated hole is connected with the ball head 23 of the metal wire, thereby combining the clamping control of the clip 3 and the disengagement control between the metal wire and the clip 3. This can avoid the mutual influence between the clamping operation and the disengagement operation of the clip 3 during surgery, reduce the complexity of the metal wire movement, and improve the operability of the hemostatic clip.

[0071] More importantly, the present invention can realize the locking of the clip 3 at different clamping degrees through the design of the multi-stage locking part, so as to meet the clamping requirements in different situations, and has better practicality and ease of operation.

[0072] Furthermore, the deformation hole 31 and the connecting hole 32 in the present technical solution are designed as an integrated hole in the form of a three-way hole, which can not only avoid affecting the strength of the clip 3 due to the opening of multiple holes, and will not cause the clip 3 to be deformed or even damaged during use, but also ensure that the first deformation wall 33 and the second deformation wall 34 have sufficient deformation to meet the locking action of the clip 3 and the separation action of the metal wire and the clip 3.

[0073] In addition, this integrated hole structure can greatly reduce the difficulty of processing. There is no need to specially consider the relative positioning relationship between the deformation hole 31 and the connection hole 32, and the precision requirements for design and manufacturing can be greatly reduced.

[0074] In addition, the present technical solution will not produce foreign matter such as debris, thus avoiding the potential uncertainties caused by foreign matter remaining in the patient's body and also avoiding additional foreign matter removal operations during surgery.

[0075] Combined with the above description, it can be known that the chuck mechanism needs to be sent to the vicinity of the lesion wound along the endoscope clamp channel. If there are clamping teeth 36 and clamping bosses 37, it may cause the width dimension of the end of the chuck mechanism to be too large even if the clip 3 is in a fully closed state, which is inconvenient to insert into the endoscope clamp channel. Therefore, this embodiment further designs the clamp arm 35 to be inclined to the side where the clamping teeth 36 are located. At this time, when the clip 3 is in a fully closed state, the width dimension of the end of the chuck mechanism will be greatly reduced, which is more conducive to the insertion of the chuck mechanism into the endoscope clamp channel. In a preferred embodiment, the inclination angle A of the clamp arm 35 is 0° to 30°. Therefore, the chuck mechanism of this embodiment has another advantage that it can more conveniently enter the endoscope clamp channel compared to other hemostatic clips with a bite structure.

[0076] Moreover, in a further improved manner, the clamping bosses 37 on the two clamping arms 35 are staggered. Compared with the direct abutment of the clamping bosses 37 on the two clamping pieces 3, which may cause interference with closing, in this embodiment, when the clamping pieces 3 are closed, since the clamping bosses 37 are staggered from each other, the width dimension of the end of the chuck mechanism will not increase too much, which is more conducive to inserting the chuck mechanism into the endoscopic forceps channel.

[0077] In a specific embodiment, two clamping bosses 37 are provided on one clamping arm 35. The two clamping bosses 37 are respectively located on both sides of the end of the clamping arm 35, and a gap is formed between the two clamping bosses 37. And one clamping boss 37 is provided on the other clamping arm 35, and this clamping boss 37 is located at the middle position of the end of the clamping arm 35 on this side. When the clamping pieces 3 on both sides are closed, one clamping boss 37 can just be fitted into the gap between the two clamping bosses 37 on the other clamping arm 35, so as to achieve a better biting effect and avoid excessive increase in the width dimension of the end of the chuck mechanism.

[0078] Since the current chuck mechanism, the materials of parts such as the clamping piece 3 mostly adopt metal materials such as stainless steel, it may cause the chuck mechanism itself to contain magnetism, which means that patients who have undergone endoscopic minimally invasive treatment cannot undergo MRI examination in a short time and cannot pass the security check when traveling. Therefore, in a preferred embodiment, both the clamping piece 3 and the connecting seat 1 are made of non-magnetic elastic materials or non-magnetic absorbable materials. Specifically, it includes 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 materials can be selected according to needs. In this way, it can be ensured that when the chuck mechanism remains in the human body, it is compatible with MRI examination, that is, it has no influence on the patient's magnetic resonance examination and no influence on passing the security check.

[0079] Combined with the attached Figure 13 to the attached Figure 18 , this embodiment proposes a hemostatic clip, which includes the chuck mechanism of Embodiment 1, and also includes a swivel base 4, a first swivel 5, a second swivel 6 and a hook 7. The swivel base 4 is located on one side of the connecting seat 1. A limiting platform 40 is fixedly provided on the swivel base 4. The first swivel 5 is located inside the swivel base 4, and both ends of the first swivel 5 are respectively abutted against the limiting platform 40. The outer wall of the second swivel 6 is fixedly connected to the inner wall of the first swivel 5. An extension boss 60 is fixedly provided on the second swivel 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, and the hanging claw 71 passes through the first release hole 61 and is inserted into the second release hole 12.

[0080] The chuck mechanism is a part of the hemostatic clamp. During surgical operation, the chuck mechanism needs to be separated from the rest of the hemostatic clamp, that is, the chuck mechanism needs to be released. Embodiment 1 has described the separation of the metal wire and the clip 3, so this embodiment is designed with a matching mechanism for the connection and release between the chuck mechanism and the rest of the hemostatic clamp.

[0081] Based on the structural description of this embodiment, the principle of connecting and disconnecting the clamp mechanism and the rest of the hemostatic clamp is as follows: the swivel seat 4 assembles the first swivel 5 inside it through the limit platform 40, but still ensures that the first swivel 5 can rotate, and the inner wall of the first swivel 5 is fixedly connected with the outer wall of the second swivel 6 by welding or bonding, or the two are integrally processed. The hook 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 at the same time, so as to connect the second swivel 6 with the connecting seat 1.

[0082] The release process of the clamp mechanism is after the metal wire is separated from the clip 3. After the metal wire is separated from the clip 3, it continues to move axially until it abuts against the hook 7 and exerts a force on the hook 7, which causes the claw 71 to be separated from the second release hole 12 on the connection seat 1. Obviously, since the clamp 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, when the claw 71 is separated from the second release hole 12, the connection seat 1 and the clip 3 thereon in the clamp mechanism can be released, so that they are retained in the human body to clamp the lesion wound surface, and the swivel seat 4, the first swivel 5, the second swivel 6 and the hook 7 below the connection seat 1 can leave the human body together with the rest of the hemostatic clip.

[0083] In a further embodiment, the hemostatic clip further comprises a handle 80, a sliding handle 81, a rotating wheel 82, a core shaft 83 and a plastic-coated spring tube 88; 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 passes through the through hole 72 and is fixedly connected to the metal wire through a connecting tube 86. 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 and the flat position through a catheter 87.

[0084] In this embodiment, the handle 80, the plastic-coated spring tube 88, the swivel base 4, and the connecting base 1 are connected in sequence to form the main structure of the hemostatic clip. Among them, the sliding handle 81, the mandrel 83, and other related structures form a traction mechanism capable of pulling the wire. That is, when the sliding handle 81 slides relative to the handle 80, the wire can be driven axially by the mandrel 83 to realize the opening, closing, locking, and releasing operations of the clip 3. The rotating wheel 82 can transmit its own rotation to the clip 3 through the cooperation of the internal flat position and the mandrel 83, thereby controlling the rotation of the clip 3. The finger ring 84 at the end of the handle 80 can improve the operation convenience of the hemostatic clip and can meet more grasping methods.

[0085] The present invention and its embodiments are schematically described above. This description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural forms and embodiments without creative efforts without departing from the purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A chuck mechanism, characterized in that: It comprises 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 clip (3) comprises a clip arm (35), a clipping tooth (36) is fixedly provided on the clip arm (35), a clipping boss (37) is fixedly provided at the end of the clip arm (35), and the clip arm (35) is inclined towards the side where the clipping tooth (36) is located; The tail of the clip (3) is provided with a deformation hole (31) and a connection hole (32), and the deformation hole (31) and the connection hole (32) are connected to form an integrated hole in the form of a three-way, so that the tail of the clip (3) forms a first deformation wall (33) and a second deformation wall (34); The connecting seat (1) is provided with a guide hole (11), the metal wire passes through the guide hole (11), the metal wire comprises two connecting segments (20), the ends of the two connecting segments (20) are fixedly provided with ball heads (23), the diameter of the ball heads (23) is larger than the passing dimension of the connecting hole (32), and the diameter of the ball heads (23) is smaller than the passing dimension of the deformation hole (31); the two connecting segments (20) respectively pass through the connecting holes (32) on the two clips (3), and the ball heads (23) are located in the deformation holes (31); A stop lock platform (30) is fixedly provided on the clip (3) near the connection hole (32), and the stop lock platform (30) comprises a stop side (301) and a non-stop side (302); limited position lock platforms (10) are provided on both sides of the connection seat (1), and the limited position lock platforms (10) comprise a limit side (101) and a non-limit side (102); the non-limit side (302) is used to abut against the non-limit side (102), and the stop side (301) is used to abut against the limit side (101); A multi-stage locking portion is provided on the clip (3) or the connecting seat (1), and the multi-stage locking portion is used to lock the clip (3) at different positions; When the multi-stage locking portion is arranged on the clip (3), the multi-stage locking portion is located on the side where the non-cutoff side (302) of the termination locking platform (30) is located, and the multi-stage locking portion is used to abut against the limit locking platform (10), and at this time, the multi-stage locking portion includes n sub-stage locking platforms (303), and the n sub-stage locking platforms (303) are arranged continuously along the non-cutoff side (302) in a direction away from the cutoff side (301); a cutoff groove (304) is formed between the n sub-stage locking platforms (303), and between the termination locking platform (30) and the adjacent sub-stage locking platform (303), and the cutoff groove (304) is used to engage with the limit locking platform (10); wherein n≥1, and n∈N; When the multi-stage locking portion is arranged on the connecting seat (1), the multi-stage locking portion is located on the side where the non-restricting side (102) of the limiting locking platform (10) is located, and the multi-stage locking portion is used to abut against the termination locking platform (30). At this time, the multi-stage locking portion includes i sub-stage limiting platforms (103), and the i sub-stage limiting platforms (103) are arranged continuously along the non-restricting side (102) in a direction away from the restriction side (101); limiting grooves (104) are formed between the i sub-stage limiting platforms (103), and between the sub-stage limiting platforms (103) and the adjacent limiting locking platforms (10), and the limiting grooves (104) are used to engage with the termination locking platform (30); wherein i≥1, and i∈N.

2. A chuck mechanism according to claim 1, characterized in that: The volume of the sub-stage locking platform (303) is less than or equal to the volume of the terminating locking platform (30).

3. A chuck mechanism according to claim 1, characterized in that: The volume of the sub-stage limiting platform (103) is less than or equal to the volume of the limiting locking platform (10).

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

5. 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.

6. A chuck mechanism according to claim 1, characterized in that: The clip (3) and the connecting seat (1) are made of non-magnetic elastic material or non-magnetic absorbable material.

7. A hemostatic clip, comprising a clamping mechanism according to any one of claims 1 to 6, 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 both 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).

8. A hemostatic clip according to claim 7, characterized in that: It also includes a handle (80), a sliding handle (81), a rotating wheel (82), a core shaft (83) and a plastic-coated spring tube (88); a finger ring (84) is provided at the end of the handle (80), and a through hole (72) is 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) via 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 metal wire via a connecting tube (86); 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 via a guide tube (87).

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