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. Aiming at the technical problem that the existing hemostatic clip has defects, the invention provides the chuck mechanism and the hemostatic clip, the structure of a clamping piece is improved, a three-way integrated hole is formed in the tail part of the clamping piece, and the integrated hole is matched and connected with a ball head of a metal wire, so that the clamping and closing of the clamping piece are controlled; and the mutual influence of the clamping and closing operation and the separation operation of the clamping pieces in the operation can be avoided by combining the control of the metal wire and the separation control between the metal wire and the clamping pieces. And moreover, through the design of the multi-stage locking part, the clamping piece can be locked under different clamping degrees, so that the clamping requirements under different conditions are met, and more excellent practicability and operation convenience are achieved.

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 an 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 circulating on the market are mainly divided into two types: the sliding groove type and the spring type. Both types of hemostatic clips are composed of a clamp tube, a clip and a stop 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 first hook claw on the first hook cooperates with the first hook mounting hole, the tear groove and the release hanger deformation hole on the clip to realize the driving action of the first hook on the clip and the disengagement action of the first hook and the clip. In this way, the first hook claw needs to be connected to the first hook mounting hole first, and then the tear groove is destroyed, so that the first hook mounting hole and the release hanger deformation hole are connected, so that the first hook claw has enough space to disengage.

[0004] However, in this design, the first hook claw needs to control the clamping of the clip when it is not disengaged, and needs to destroy the tear groove and slide into the deformation hole of the release platform when it is disengaged. This makes the movement behavior of the first hook complex, which is reflected in the surgical operation. It is difficult to control and can easily lead to misoperation by the surgical operator. In addition, this method requires that two through holes, the first hook installation hole and the release platform deformation hole, be set on the first hook with a very small size at the same time, which greatly reduces the strength of the tail of the clip. Although a tear groove is initially set between the first hook installation hole and the release platform deformation hole, the tear groove itself has a low structural strength to ensure the tearing effect, and it cannot ensure the strength of the tail of the clip, which can easily cause the clip to deform or even be damaged during use, thereby 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 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 To solve the above problems, the technical solution provided by the present invention is: a clamping mechanism, including a connecting seat, a metal wire and two clamping pieces; the two clamping pieces intersect and are hinged with the connecting seat at the intersection, the clamping piece includes a clamping arm, a clamping tooth is fixedly provided on the clamping arm, a clamping boss is fixedly provided on the end of the clamping arm, and the clamping arm is inclined toward the side where the clamping tooth is located; a deformation hole and a connecting hole are provided at the tail of the clamping piece, the deformation hole is connected with the connecting hole to form an integrated hole in the form of a tee, so that the tail of the clamping piece forms a first deformation wall and a second deformation wall; a guide hole is provided on the connecting seat, the metal wire passes through the guide hole, the metal wire includes two connecting segments, and ball heads are fixedly provided at the ends of the two connecting segments, the diameter of the ball head is larger than the passing size of the connecting 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 two The connecting hole on the clip, the ball head is located in the deformation hole; a termination lock platform is fixedly arranged on the clip near the connecting hole, and the termination lock platform includes a cut-off side and a non-cut-off side; limited locking platforms are arranged on both sides of the connecting seat, and the limit locking platform includes a limit 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 limit side; a multi-stage locking part is arranged on the clip or the connecting seat, and the multi-stage locking part is used to lock the clip at different positions; when the multi-stage locking part is arranged on the clip, the multi-stage locking part is located on the side where the non-cut-off side of the termination lock platform is located, and the multi-stage locking part is used to abut against the limit 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 limit locking platform is located, and the multi-stage locking part is used to abut against the termination lock platform.

[0010] Optionally, when the multi-stage locking portion is arranged on the clip, the multi-stage locking portion includes n sub-stage locking platforms, and the n sub-stage locking platforms are continuously arranged along the non-cut-off side in a direction away from the cut-off side; a cut-off groove is formed between the n sub-stage locking platforms, and between the termination locking platform and the adjacent sub-stage locking platforms, and the cut-off groove is used to engage with the limit locking platform; wherein n≥1, and n∈N.

[0011] Optionally, the volume of the sub-stage locking platform is less than or equal to the volume of the termination locking platform.

[0012] Optionally, when the multi-stage locking portion is arranged on the connecting seat, the multi-stage locking portion includes i sub-stage limiting platforms, and the i sub-stage limiting platforms are continuously arranged along the non-limiting side in the direction away from the limiting side; limiting grooves are formed between the i sub-stage limiting platforms, and between the sub-stage limiting platforms and the adjacent limiting locking platforms, and the limiting grooves are used to engage with the termination locking platform; wherein, i≥1, and i∈N.

[0013] Optionally, the volume of the sub-stage limiting platform is less than or equal to the volume of the limiting locking platform.

[0014] Optionally, the inclination angle A of the clamping arm is 0° to 30°.

[0015] Optionally, the clamping bosses on the two clamping arms are arranged alternately.

[0016] Optionally, the clip and the connecting seat are made of non-magnetic elastic material or non-magnetic absorbable material.

[0017] 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.

[0018] Optionally, it also includes a handle, a sliding handle, a rotating wheel, a core shaft and a plastic-coated spring tube; a finger ring is provided at the end of the handle, and a through hole is 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 passes through the through hole and is fixedly connected to the metal wire through a connecting tube; the rotating wheel is rotatably connected to the handle, 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.

[0019] Beneficial Effects The technical solution provided by the present invention has the following beneficial effects compared with the prior art: in response to the technical problems of defects in the existing hemostatic clips, the present invention proposes a clamping mechanism and a hemostatic clip, which improves the structure of the clip, and opens an integrated hole in the form of a three-way at the tail of the clip, which is matched and connected with the ball head of the metal wire, thereby combining the clamping control of the clip and the detachment control between the metal wire and the clip, which can avoid the mutual influence of the clamping operation and the detachment operation of the clip during surgery, reduce the complexity of the metal wire movement, and improve the operability of the hemostatic clip.

[0020] More importantly, the present invention can achieve locking of the clip at different clamping degrees through the design of a multi-level locking portion, so as to meet the clamping requirements in different situations and has better practicality and ease of operation.

[0021] In addition, the deformation holes and connecting holes in the present technical solution are designed as an integrated hole in the form of a tee, which can not only avoid affecting the strength of the clip due to the opening of multiple holes, and will not cause the clip to be deformed or even damaged during use, but also ensure that the first deformation wall and the second deformation wall have sufficient deformation to meet the locking action of the clip and the separation action of the metal wire and the clip.

[0022] 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 and the connection hole, and the precision requirements for design and manufacturing can be greatly reduced.

[0023] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is one of the structural schematic diagrams of the clamping mechanism proposed in the embodiment of the present invention.

[0025] Figure 2 This is one of the structural schematic diagrams of the clip proposed in the embodiment of the present invention.

[0026] Figure 3 This is the second structural schematic diagram of the clip proposed in the embodiment of the present invention.

[0027] Figure 4 This is the third structural schematic diagram of the clip proposed in the embodiment of the present invention.

[0028] Figure 5 This is the fourth structural schematic diagram of the clip proposed in the embodiment of the present invention.

[0029] Figure 6 This is one of the structural schematic diagrams of the connecting socket proposed in the embodiment of the present invention.

[0030] Figure 7 This is the second structural schematic diagram of the connecting socket proposed in the embodiment of the present invention.

[0031] Figure 8 This is the third structural schematic diagram of the connecting socket proposed in the embodiment of the present invention.

[0032] Fig. 9 This is one of the matching schematic diagrams of the clamping mechanism proposed in the embodiment of the present invention.

[0033] Fig.10This is the second schematic diagram of the matching of the chuck mechanism proposed in the embodiment of the present invention.

[0034] Fig.11 This is the second structural schematic diagram of the chuck mechanism proposed in the embodiment of the present invention.

[0035] Fig.12 This is the third structural schematic diagram of the chuck mechanism proposed in the embodiment of the present invention.

[0036] Fig.13 This is a schematic structural diagram of the first rotating ring proposed in an embodiment of the present invention.

[0037] Fig.14 This is a schematic diagram of the structure of the second rotating ring proposed in an embodiment of the present invention.

[0038] Fig.15 This is a schematic diagram of the structure of the hook proposed in an embodiment of the present invention.

[0039] Fig.16 This is a schematic diagram of the structure of the hemostatic clip provided in an embodiment of the present invention.

[0040] Fig.17 This is one of the working schematic diagrams of the hemostatic clip provided in the embodiment of the present invention.

[0041] Fig.18 This is the second working schematic diagram of the hemostatic clip proposed in the embodiment of the present invention. DETAILED DESCRIPTION

[0042] 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.

[0043] 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.

[0044] Combined with Figure 1 To Attachment Fig.12 This embodiment provides a clamping mechanism, including a connecting seat 1, a metal wire and two clamping pieces 3. The two clamping pieces 3 intersect and are hinged to the connecting seat 1 at the intersection. 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. The clamping arm 35 is inclined to the side where the clamping tooth 36 is located.

[0045] 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 integral 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, and the metal wire passes through the guide hole 11. The metal wire includes two connecting segments 20, and the ends of the two connecting segments 20 are fixedly provided with ball heads 23, and the diameter of the ball heads 23 is larger than the passing size of the connecting hole 32, and the diameter of the ball heads 23 is smaller than the passing size of the deformation hole 31; the two connecting segments 20 pass through the connecting holes 32 on the two clips 3 respectively, and the ball heads 23 are located in the deformation holes 31.

[0046] A termination lock platform 30 is fixedly provided on the clip 3 near the connecting hole 32, and the termination lock platform 30 includes a cut-off side 301 and a non-cut-off side 302; limit lock platforms 10 are provided on both sides of the connecting seat 1, and the limit lock platforms 10 include a limit side 101 and a non-limit side 102; the non-cut-off side 302 is used to abut against the non-limit side 102, and the cut-off side 301 is used to abut against the limit side 101.

[0047] A multi-stage locking part is provided on the clip 3 or the connecting seat 1, and the multi-stage locking part is used to lock the clip 3 at different positions. When the multi-stage locking part is provided on the clip 3, the multi-stage locking part is located on the side where the non-cut-off side 302 of the end lock stage 30 is located, and the multi-stage locking part is used to abut against the limit lock stage 10; when the multi-stage locking part is provided on the connecting seat 1, the multi-stage locking part is located on the side where the non-limiting side 102 of the limit lock stage 10 is located, and the multi-stage locking part is used to abut against the end lock stage 30.

[0048] The clamping mechanism of this embodiment is a component of the hemostatic clamp, and its connecting seat 1 needs to be connected with other parts of the hemostatic clamp, and the metal wire also needs to be connected with the traction mechanism in the hemostatic clamp. To simplify the description, this embodiment does not elaborate on the rest of the hemostatic clamp, but it should be noted that the metal wire will be pulled along the axial direction of the connecting seat 1 by the traction action of the traction mechanism in the hemostatic clamp.

[0049] The working process of the clamping mechanism of this embodiment is divided into three processes: opening and clamping of the clamping piece 3, locking of the clamping piece 3 when it is clamped to different degrees, and separation of the metal wire from the clamping piece 3 after the clamping piece 3 is locked. Among them, the clamping of the clamping piece 3 and the separation of the clamping piece 3 from the metal wire are achieved by relying on the integrated hole in the form of a three-way formed by the connection between the deformation hole 31 and the connecting hole 32, and the ball head 23 of the metal wire. And the locking of the clamping piece 3 when it is clamped to different degrees is achieved by relying on the cooperation between the end lock platform 30, the limit lock platform 10 and the multi-stage locking part. In short, the clamping mechanism of this embodiment combines the clamping control and the separation control of the clamping piece 3 by connecting the deformation hole 31 and the connecting hole 32 with the ball head 23 at the end of the metal wire.

[0050] The opening and closing process of the clip 3 mainly refers to the control of the opening and closing of the clip 3, and its working principle is: push or pull the metal wire axially, because the ball head 23 at the end of the connecting segment 20 is connected to the deformation hole 31 and the connecting hole 32, and the passing size of the connecting hole 32 is smaller than the diameter of the ball head 23, the clip 3 will move with the movement of the metal wire, thereby realizing the opening and closing of the clip 3.

[0051] During the operation of hemostasis by the clamping method, after the clip 3 has clamped the diseased tissue, it is necessary to continue to maintain the clamping of the diseased tissue by the clip 3. It is conceivable that in actual operation, since the volume of the diseased tissue to be clamped by the clamping method is different, the size of the opening between the clips 3 is also different, that is, the clamping degree of the clamping mechanism is different. When clamping a larger volume of diseased tissue, the size of the opening between the clips 3 will be relatively large, and when clamping a smaller volume of diseased tissue, the size of the opening between the clips 3 will be relatively small, so it involves locking the clip 3 when maintaining a certain clamping degree.

[0052] The locking principle of the clip 3 is closely related to the structure of the joint assembly, that is, it is closely related to the setting form of the multi-stage locking part, and can be roughly divided into two situations: one is that the multi-stage locking part is located on the clip 3, that is, the multi-stage locking is achieved by the multi-stage locking part or the end locking platform 30 on the clip 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 the 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 end locking platform 30 on the clip 3.

[0053] Taking the multi-stage locking part arranged on the clamp 3 as an example, in this embodiment, the multi-stage locking part includes n sub-stage locking platforms 303, and the n sub-stage locking platforms 303 are continuously arranged along the non-cut-off side 302 in the direction away from the cut-off side 301; a cut-off 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 cut-off groove 304 is used to engage with the limit locking platform 10; wherein, n≥1, and n∈N.

[0054] Based on this embodiment, after the clip 3 clamps the diseased tissue, by continuing to pull the metal wire, the sub-stage locking platform 303 and the limit locking platform 10 come into contact and squeeze each other. Due to the existence of the deformation hole 31, the first deformation wall 33 and the second deformation wall 34 will be fully deformed, causing part of the sub-stage locking platform 303 to pass over the limit locking platform 10. At this time, 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, the sub-stage locking platform 303 that has passed 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 stuck in the corresponding cut-off groove 304, and the deformation hole 31 has also been reset, causing the clip 3 to be unable to rotate and reset. At this time, the locking of the clamping head mechanism at a certain opening degree is achieved.

[0055] 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 passes over the limit locking platform 10, and the clip 3 cannot continue to rotate. The locking principle at this time is the same as the above situation and will not be repeated. If the volume of the diseased tissue to be clamped is small enough, it is also possible that n sub-level locking platforms 303 all pass over the limit locking platform 10. At this time, the clip 3 is locked by the cooperation of the terminating locking platform 30 and the limit locking platform 10. That is, the terminating locking platform 30 also passes over the limit locking platform 10, and the cut-off side 301 of the terminating 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.

[0056] It is conceivable that the number of sub-level lock stations 303 can be any number, with the Figure 1 , Attachment Figure 2 and attached Figure 4 For example, in the implementation manner of these figures, there is only one sub-level locking platform, and there is a cut-off groove 304 between the sub-level locking platform and the end locking platform 30, which can provide an additional first-level locking. In combination with the locking cooperation of the end 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 locking of the clip 3 can be achieved.

[0057] Generally speaking, the volume of the sub-stage locking platform 303 can be consistent with the volume of the final locking platform 30, but in order to ensure the clamping tightness as much as possible, more sub-stage locking platforms 303 are required to cross the limit locking platform 10, so in a more preferred embodiment, the volume of the sub-stage locking platform 303 can be smaller than the volume of the final locking platform 30. In short, the volume of the sub-stage locking platform 303 should be less than or equal to the volume of the final locking platform 30.

[0058] It is conceivable that, similar to the principle of the above-mentioned embodiment, the multi-stage locking part can also be a plurality of grooves, a plurality of hooks 7 or other forms of clamping structures arranged at the tail of the clip 3 and continuously arranged along the swinging direction of the clip 3. In short, the multi-stage locking part can ensure that when the clip 3 swings to different amplitudes, the tail of the clip 3 can cooperate with the limit lock platform 10 on the connecting seat 1, and the clamping action of the multi-stage locking part and the limit lock platform 10 can realize that the clamp mechanism can be locked at different clamping degrees.

[0059] Another embodiment takes the multi-stage locking part being arranged on the connecting seat 1 as an example. In this embodiment, the multi-stage locking part includes i sub-stage limiting platforms 103, and the i sub-stage limiting platforms 103 are continuously arranged along the non-limiting side 102 in the direction away from the limiting 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 lock platforms 10, and the limiting grooves 104 are used to engage with the termination lock platform 30; wherein, i≥1, and i∈N.

[0060] Similar to the form and principle of the aforementioned sub-stage locking platform 303, this embodiment proposes to set i sub-stage limiting platforms 103 on the connecting seat 1, and realize the locking of the clamping head mechanism at a certain opening degree by clamping the termination locking platform 30 at the tail of the clamp 3 with the limiting groove 104 in this embodiment.

[0061] The specific principle is: the clamp 3 rotates, and the existence of the deformation hole 31 causes the end lock stage 30 to pass over one or more sub-level limiting stages 103. When the clamp is at an appropriate clamping degree, the reaction force exerted on the clamp 3 by the diseased tissue causes the clamp 3 to be unable to continue to swing. At this time, the end lock stage 30 will be stuck in a corresponding limiting groove 104, so that the movement of the clamp 3 is restricted and cannot be rotated and reset. Being stuck in different limiting grooves 104 means that the clamp mechanism is locked at different opening degrees.

[0062] Similar to the above-mentioned embodiment, if the volume of the diseased tissue to be clamped is small enough, the terminating locking platform 30 may also pass over all i sub-level limiting platforms 103. At this time, the clamp 3 is locked by the cooperation between the terminating locking platform 30 and the position-limiting locking platform 10. That is, the terminating locking platform 30 will eventually pass over the position-limiting locking platform 10, and the cut-off side 301 of the terminating locking platform 30 will abut against the limiting side 101 of the position-limiting locking platform 10, thereby achieving clamping and locking when the clamp 3 is in the minimum closed state.

[0063] It is conceivable that the number of sub-level limiting stations 103 can be any number, with the Figure 6 and attached Figure 7For example, in the implementation manner of these figures, there is only one sub-stage limiting platform 103, and there is a limiting groove 104 between the sub-stage limiting platform 103 and the limiting lock platform 10, which can provide an additional first-level locking. In combination with the locking cooperation 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 opening degrees of locking of the clip 3 can be achieved.

[0064] Generally speaking, the volume of the sub-stage limiting platform 103 can be consistent with the volume of the limiting locking platform 10, but in order to ensure the clamping tightness as much as possible, the terminating locking platform 30 needs to cross as many sub-stage limiting platforms 103 as possible, so in a more preferred embodiment, the volume of the sub-stage limiting platform 103 can be smaller than the volume of the limiting locking platform 10. In short, the volume of the sub-stage limiting platform 103 is less than or equal to the volume of the limiting locking platform 10.

[0065] In combination with the two different embodiments of the multi-stage locking part mentioned above, it can be known that the limit stroke of the clip 3 when it is not locked is the position of the clip 3 when the multi-stage locking part located on the clip 3 just abuts against the non-restrictive side 102 of the limit lock platform 10, or the position of the clip 3 when the multi-stage locking part located on the connecting seat 1 just abuts against the non-stop side 302 of the termination lock platform 30.

[0066] The separation of the metal wire and the clip 3 occurs after the clip 3 is in the locked state. The principle is that the metal wire continues to be pulled. Since the clip 3 cannot continue to move at this time, the ball head 23 will continue to exert force on the first deformable wall 33 and the second deformable wall 34. The first deformable wall 33 and the second deformable wall 34 will continue to deform until the passing size of the connecting hole 32 is larger than the diameter of the ball head 23. The ball head 23 is thus pulled out, and the metal wire and the clip 3 are also separated. Then the metal wire will pass through the guide hole 11 and leave the clamping mechanism. At this time, the rest of the clamping mechanism except the metal wire will remain in the human body to ensure the clamping of the lesion wound.

[0067] The clamping process of the clip 3 is mainly aimed at clamping the lesion wound surface. In order to ensure the clamping effect on the lesion wound surface, the clip 3 of this embodiment is provided with clamping teeth 36 and clamping bosses 37. The clamping teeth 36 and clamping bosses 37 can further improve the clamping effect of the clamping mechanism on the lesion wound surface. At the same time, this design can also make the clamping mechanism have a better clamping effect.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] And, in a further improved manner, the clamping bosses 37 on the two clamp arms 35 are staggered. Compared with the clamping bosses 37 on the two clamping pieces 3 directly abutting against each other, which will hinder the closing, in this embodiment, when the clamping pieces 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.

[0075] In a specific embodiment, two clamping bosses 37 are provided on the clamping arm 35 on one side, and 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. On the other side, one clamping boss 37 is provided on the clamping arm 35, and the clamping boss 37 is located in the middle position of the end of the clamping arm 35 on this side. When the clamping pieces 3 on both sides are closed, the clamping boss 37 on one side can be just fitted into the gap between the two clamping bosses 37 on the clamping arm 35 on the other side, thereby achieving a better bite effect and avoiding excessive increase in the width dimension of the end of the clamping head mechanism.

[0076] Since the current chuck mechanism, the material of the clip 3 and other parts thereof are 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 and the connecting seat 1 are both 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, polyformaldehyde, 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.

[0077] Combined with Fig.13 To Attachment Fig.18 This embodiment proposes a hemostatic clip, including the chuck mechanism of embodiment 1, and also including a swivel seat 4, a first swivel 5, a second swivel 6 and a hook 7. The swivel seat 4 is located on 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 the two 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] In this embodiment, the handle 80, the plastic-coated spring tube 88, the rotating ring seat 4 and the connecting seat 1 are connected in sequence to form the main structure of the hemostatic clip. Among them, the sliding handle 81 and the core shaft 83 and other related structures constitute a traction mechanism that can pull the metal wire, that is, the sliding of the sliding handle 81 relative to the handle 80 can drive the axial movement of the metal wire through the core shaft 83 to achieve the opening and closing, closing and locking, and disengagement and release 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 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.

[0083] The present invention and its embodiments are described schematically above, which is not restrictive. The drawings show only one embodiment 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 shall 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 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-stop side (302) of the stop lock platform (30) is located, and the multi-stage locking portion is used to abut against the limit lock platform (10); 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 terminating locking platform (30).

2. A chuck mechanism according to claim 1, characterized in that: When the multi-stage locking portion is arranged on the clip (3), the multi-stage locking portion comprises n sub-stage locking platforms (303), wherein the n sub-stage locking platforms (303) are arranged continuously along the non-cut-off side (302) in a direction away from the cut-off side (301); a cut-off groove (304) is formed between the n sub-stage locking platforms (303) and between the terminating locking platform (30) and the adjacent sub-stage locking platform (303), and the cut-off groove (304) is used for engaging with the limiting locking platform (10); wherein n≥1, and n∈N.

3. A chuck mechanism according to claim 2, 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).

4. A chuck mechanism according to claim 1, characterized in that: When the multi-stage locking portion is arranged on the connecting seat (1), the multi-stage locking portion comprises i sub-stage limiting platforms (103), wherein the i sub-stage limiting platforms (103) are arranged continuously along the non-limiting side (102) in a direction away from the limiting 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.

5. A chuck mechanism according to claim 4, 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).

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 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.

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 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).

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 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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