WO2022257538A1 - Insertable tissue clamping apparatus and gripping piece thereof - Google Patents

Abstract

An insertable tissue clamping apparatus and a gripping piece (100) thereof. The insertable tissue clamping apparatus comprises the integrally formed gripping piece (100). The gripping piece (100) comprises a gripping body (110) and a detachment body (120). A gripping arm (111) of the gripping body (110) comprises a gripping head (1111) and a bendable portion (1112), the bendable portion (1112) being provided with a deformation structure capable of bending in a closing direction of the gripping body (110) and/or an opening direction of the gripping body (110). The gripping body (110) is directly driven by a movement rod (200), and the opening and closing of the gripping body (110) is implemented by means of the deformation state of the bendable portion (1112). Under the same opening conditions, the length of the one-piece gripping body (110) is shorter than the combination of a gripping arm and a sleeve as in the prior art. In addition, the gripping body (110) and the detachment body (120) are connected as one piece by means of a first tear portion (130), and may be integrally formed and manufactured.

Description

Plug-in tissue clamping device and its clamping parts technical field

The present application relates to the field of medical devices, in particular to a structure of an insertable tissue clipping device used for surgery.

Background technique

The plug-in tissue clipping device is a plug-in medical device, which is used to clip the tissue in the human body or animal body to stop bleeding or close it, and it includes hemostatic clips, tissue clips, etc.

For example, during the minimally invasive treatment of digestive tract diseases, the tissue clamping device is usually inserted through the instrument channel of the endoscope to achieve the purpose of treatment. For example, hemostatic clips (or tissue clips) have been widely used to stop bleeding or close gastrointestinal bleeding or wound sites.

In the prior art, a type of hemostatic clip (or tissue clip) is mainly opened and clamped through the cooperation of the clamping arm and the sleeve. Specifically, the left and right clamping arms are loosely assembled together through a pin. When As the clamp arm assembly is pulled in the proximal direction, the clamp arms are progressively retracted into the sleeve and engage the front edge of the sleeve. Limited by the outer diameter of the sleeve, the sleeve exerts a reverse pressing force on the clamping arm, and the clamping arm is elastically deformed inward, thereby closing. When the clamping arm assembly moves to the far side, the clamping arm is pushed out from the sleeve, and the clamping arm automatically reopens due to its elastic restoring force, so that the clamping device can be opened and closed repeatedly. Since this structure utilizes the space in the axial direction of the sleeve to close the clamping arm, a part of the clamping arm must be shrunk in the sleeve, resulting in a longer overall length of the hemostatic clip remaining in the patient's body after separation, which is easier to fix. Patient injury and discomfort.

In another type of hemostatic clip (or tissue clip), the clamping arm is mainly connected by a rotating shaft, and then there is a track sliding up and down in the sleeve, and the shaft can slide along the track. There is also a fixed shaft at the upper end of the sleeve, and the clamping arm has a strip-shaped hole, and the fixed shaft passes through the strip-shaped hole of the clamping arm simultaneously. Pushing and pulling the sliding shaft drives the two clamp arms to move up and down, and after being hindered by the fixed shaft, the clamp arms are forced to move along the path of the elongated hole, so as to realize opening and closing. This structure improves the control precision, and the size of the clip becomes smaller, but there are many parts, the structure becomes complicated, and the cost is high. Under the premise of the same opening width, the overall length of the clip is still relatively large. Therefore, the overall size of the clip will be longer, which is not conducive to passing through the endoscopic instrument channel, and the foreign body sensation of the whole clip when it stays in the human body is obvious.

technical problem

The present application provides a plug-in tissue clamping device and its clamping parts to demonstrate a new opening and clamping structure.

technical solution

Based on the above purpose, an embodiment of the present application provides a plug-in tissue clipping device, including:

A clamping piece, the clamping piece is an integrally formed structure, which includes a clamping body and a detachment body, the clamping body includes at least two clamping arms, the clamping arms are connected, and each set of clamping The holding arm includes a clamping head and a bendable part; the bendable part has a deformation structure capable of bending toward the closing direction of the clamping body and/or bending toward the opening direction of the clamping body, and the clamping The body is connected to the detachment body through a structure that can be separated under the action of an external force applied by the operator;

a movement rod, the movement rod is connected with the clamping body to drive the clamping body to open and close;

A transmission assembly, the transmission assembly includes a bushing assembly and a transmission member passing through the bushing assembly, the transmission member is connected to the movement rod, and the detachment body is rotatably connected to the bushing assembly on, so that the clamping member can rotate relative to the sleeve assembly as a whole;

and a control handle, the sleeve assembly is connected to the control handle, and the control handle forms a linkage structure with the transmission member to control the movement of the movement rod and the clamping member;

The moving rod has a first stroke, a second stroke and a third stroke; in the first stroke, the moving rod drives the clamping heads away from each other to open the clamping heads; In the second stroke, the moving rod drives the clamping heads close to each other, and the clamping body moves to the clamping state to clamp the target; in the third stroke, the clamping body keeps clamping state, and separated from the moving rod, the disengagement body is disconnected from the clamping body.

In one embodiment, the deformation structure includes several first contraction seams, and the first contraction seams are arranged in sequence along the longitudinal direction of the clamping body.

In one embodiment, the first contraction seam is divided into several groups, and each group of the first contraction seam has at least one first contraction seam; the bendable part has a plurality of first contraction seams extending along its circumference. Two contraction joints, the second contraction joints are arranged along the longitudinal direction; the two ends of each group of the first contraction joints extend into two longitudinally adjacent second contraction joints correspondingly Between, the overlapping area between the first contraction seam and the second contraction seam forms a twisted section, so that the bendable part can be deformed by bending and torsion.

In one embodiment, each of the limiting structures includes several limiting units arranged along the longitudinal direction of the clamping body, and the limiting units include a first limiting block and a second limiting block that are oppositely arranged , there is a gap arranged along the longitudinal direction between the first limiting block and the second limiting block, and the second contraction joint communicates with the gap; the bendable part bends toward the opening direction During the process, the first limiting block and the second limiting block approach each other and form a buckling structure.

In one embodiment, the initial state of the clamping body is a clamping state; the second contraction joint has a gap in the longitudinal direction, and the second contraction joint forms a self-contained structure capable of deforming toward the clamping direction. The floating structure is adapted so that when the clamping body clamps the target, the bendable portion can adaptively bend and deform in the closing direction according to the volume of the target.

Based on the above purpose, an embodiment of the present application provides a clamping part of a plug-in tissue clamping device, including a clamping body and a detachment body, the clamping body and the detachment body are integrally formed, the clamping The body includes at least two clamping arms connected between the clamping arms, and each set of clamping arms includes a clamping head and a bendable portion; the bendable portion has a closing direction capable of moving toward the clamping arm A deformation structure that bends and/or bends toward the opening direction of the clamping arm, and the clamping body is connected to the detachment body through a structure that can be separated under the action of an external force applied by the operator.

In one embodiment, the deformation structure includes several first contraction seams, and the first contraction seams are arranged in sequence along the longitudinal direction of the clamping body.

In one embodiment, the bendable part has a plurality of second shrinkage seams extending along its circumference, and the second shrinkage seams are arranged along the longitudinal direction; each group of the first shrinkage seams The two ends correspondingly protrude between two longitudinally adjacent second contraction joints, and the overlapping area between the first contraction joint and the second contraction joint forms a distorted section, so that The bendable portion is capable of bending and torsion deformation.

In one embodiment, each of the limiting structures includes several limiting units arranged along the longitudinal direction of the clamping body, and the limiting units include a first limiting block and a second limiting block that are oppositely arranged , there is a gap arranged along the longitudinal direction between the first limiting block and the second limiting block, and the second contraction joint communicates with the gap; the bendable part bends toward the opening direction During the process, the first limiting block and the second limiting block approach each other and form a buckling structure.

In one embodiment, the initial state of the clamping body is a clamping state; the second contraction joint has a gap in the longitudinal direction, and the second contraction joint composition of the limiting structure can move toward the clamping A direction-deformable adaptive floating structure, so that when the clamping body clamps the target, the bendable portion can self-adaptively bend and deform in the closing direction according to the volume of the target.

Beneficial effect

According to the insertion type tissue clipping device of the above-mentioned embodiment, it includes an integrally formed clamping part. The clamping piece includes a clamping body and a disengaging body. In the clamping body, the clamping arm includes a clamping head and a bendable portion, and the bendable portion has a deformable structure capable of bending toward the closing direction of the clamping body and/or bending toward the opening direction of the clamping body. In this structure, the sleeve in the existing structure is omitted, and the clamping body is directly driven by the moving rod, combined with the deformation state of the bendable part, so as to realize the opening and closing of the clamping body. Under the same opening width requirement, the length of the one-piece clamping body is shorter than the combination of the clamping arm and the sleeve in the prior art. Moreover, the clamping body and the detachment body are connected as a whole through the first tearing part, and can be manufactured by integral molding. After adopting the clamping part manufactured by integral molding, the whole tissue clamping device has fewer parts, simpler structure, lower assembly requirements, and greatly reduced cost.

Description of drawings

picture 1 It is a schematic structural diagram of the plug-in tissue clipping device in an embodiment of the present application, in which the transmission component adopts the omitted drawing method;

picture 2 It is a partial cross-sectional view of the connection structure between the clamping member and the transmission assembly in an embodiment of the present application;

picture 3 It is a schematic structural view of the clamping body in a clamping state in one embodiment of the present application;

picture 4 It is a schematic structural view of the clamping body in an open state in one embodiment of the present application;

picture 5 It is a schematic diagram of the structure of the plug-in tissue clipping device in an embodiment of the present application when it is in an open state (the movement rod moves in the first stroke);

picture 6 for figure 5 Schematic diagram of the structure of the part of the clamping part cut away in the state shown;

picture 7 It is a schematic diagram of the structure of the plug-in tissue clamping device in an embodiment of the present application when it is in the clamping state (the movement rod moves in the second stroke);

picture 8 for figure 7 Schematic diagram of the structure of the part of the clamping part cut away in the state shown;

picture 9 It is a schematic diagram of the structure of the plug-in tissue clamping device in an embodiment of the present application when the clamping arm is locked in the locking structure (the movement rod moves in the third stroke) in the clamping state;

picture 10 for figure 9 Schematic diagram of the structure of the part of the clamping part cut away in the state shown;

picture 11 It is a schematic diagram of the structure of the plug-in tissue clamping device in an embodiment of the present application when the retaining section and the separation section on the moving rod are broken from the second tearing part (the moving rod moves in the third stroke);

picture 12 for figure 11 Schematic diagram of the structure of the part of the clamping part cut away in the state shown;

picture 13 It is a schematic diagram of the structure of the plug-in tissue clamping device in an embodiment of the present application when the clamping body and the detachment body are broken from the first tearing part (moving rod moves in the third stroke) in the clamping state;

picture 14 It is a schematic diagram of the unfolded shape of the clip in an embodiment of the present application;

picture 15 for figure 14 The enlarged schematic diagram of the deformation structure of the bendable part in the shown embodiment;

picture 16 It is an enlarged schematic diagram of the deformation structure of the bendable part in another embodiment of the present application;

picture 17 It is an enlarged schematic diagram of the deformation structure of the bendable part in another embodiment of the present application;

picture 18 It is a schematic diagram of the deformation structure of the bendable part when the clamping member clamps thin tissue in one embodiment of the present application;

picture 19 It is a schematic diagram of the deformation structure of the bendable part when the clamping member clamps thicker tissue in one embodiment of the present application;

picture 20 It is a schematic diagram of the deformation structure of the bendable part in another embodiment of the present application;

picture twenty one It is a structural schematic diagram of an integrally formed movement rod in an embodiment of the present application;

picture twenty two It is a structural schematic diagram of the clamping head in an open self-locking state in an embodiment of the present application;

picture twenty three It is a structural schematic diagram of the integrally formed movement rod breaking from the second tear part in an embodiment of the present application;

picture twenty four It is a structural schematic diagram of the second tear part on the integrally formed movement rod in an embodiment of the present application;

picture 25 It is a schematic diagram of the connection between the movement rod and the clamping body when the clamping body is in an open state in one embodiment of the present application;

picture 26 It is a schematic diagram of the connection between the movement rod and the clamping body when the clamping body is in the clamping state in one embodiment of the present application;

picture 27 It is a schematic diagram of the structure of the clamping body and the detachment body when they are broken through the first tearing part in one embodiment of the present application;

picture 28 It is a schematic structural view of the first tearing part in an unbroken state in an embodiment of the present application;

Fig. 29 is a schematic structural view of the first tearing part in a broken state in an embodiment of the present application .

Embodiments of the present invention

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Wherein, similar elements in different implementations adopt associated similar element numbers. In the following implementation manners, many details are described for better understanding of the present application. However, those skilled in the art can readily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the application are not shown or described in the description, this is to avoid the core part of the application being overwhelmed by too many descriptions, and for those skilled in the art, it is necessary to describe these operations in detail Relevant operations are not necessary, and they can fully understand the relevant operations according to the description in the specification and general technical knowledge in the field.

In addition, the characteristics, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the order of each step or action in the method description can also be exchanged or adjusted in a manner obvious to those skilled in the art. Therefore, various sequences in the specification and drawings are only for clearly describing a certain embodiment, and do not mean a necessary sequence, unless otherwise stated that a certain sequence must be followed.

The serial numbers assigned to components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "connection" mentioned in this application include direct and indirect connection (connection) unless otherwise specified.

This embodiment provides a plug-in tissue clamping device (for convenience of description, hereinafter referred to as the clamping device), which is used to clamp human or animal internal tissues (collectively referred to as the target) to stop bleeding Or closure, which may include, but not limited to, hemostatic clips, tissue clips, and the like.

Please refer to FIGS. 1-13 , the clamping device includes a clamping member 100 , a moving rod 200 , a transmission assembly 300 and a control handle 400 .

Different from the combination of the clamping arm and the sleeve in the prior art to realize the clamping structure, in this embodiment, the clamping member 100 is integrally formed. The integrally formed structure means that the entire clamping member 100 is integrally processed from the same material, rather than assembled from two or more parts. One-piece molded structures (including other one-piece molded structures described below) can be made by, but not limited to, injection molding, laser cutting, and other mechanical processing techniques. In particular, when laser cutting is used, the processing of extremely small gaps can be realized, which is beneficial to the miniaturization of the overall structure and the improvement of the compactness of the structure.

Please refer to FIGS. 2-4 , the clip 100 includes a clip body 110 and a disengagement body 120 . The clamping body 110 and the detachment body 120 form an integrated structure, and the two are connected by a structure that can be separated under the external force applied by the operator. For example, the structure can be the first tearing part 130 shown in the figure or other structure. The first tearing portion 130 allows the operator to separate the clamping body 110 and the detachment body 120 through external force.

The clamping body 110 includes at least two clamping arms 111 . The clamping arms 111 are connected as a whole. Each set of clamping arms 111 includes a clamping head 1111 and a bendable portion 1112 . The clamping arms 111 are arranged in a jaw-like structure to clamp the target object. The claw-type structure is a structure capable of firmly grasping the target. For example, in FIGS. (At this point in the clamping state), the target can be grabbed, as shown in Figures 18 and 19. In other embodiments, when there are different numbers of clamping arms 111, they may have different clamping claw structures. For example, when there are three clamping arms 111, the three clamping arms 111 may be arranged in a triangle , to grab the target.

Please refer to FIGS. 3 and 4 . In one embodiment, the bendable portion 1112 is a semi-cylindrical structure, and when the clamping body 110 is closed, the bendable portion 1112 can form a cylindrical structure. The semi-cylindrical shape refers to an incomplete cylindrical shape, which is not necessarily half of the cylindrical structure, but can also be one-third of the entire cylindrical structure or other sizes. In addition, in other embodiments, the bendable portion 1112 can also be in other structures, such as a sheet, and is not limited to the semi-cylindrical structure.

Different from the opening and closing of the clamping arm by limiting the position of the clamping arm through the sleeve in the prior art, in this embodiment, the opening and closing of the clamping arm 111 mainly depends on the deformation of the bendable portion 1112 . Wherein, the bendable portion 1112 has a deformable structure capable of bending toward the closing direction of the holding body 110 and/or bending toward the opening direction of the holding body 110 . Please refer to FIGS. 1-4 , in the illustrated embodiment, the initial state of the clamping body 110 is the clamping state, that is, the bending portion 1112 is in the clamping state without deformation. At this time, the bendable portion 1112 has at least a deformable structure capable of bending the clamping body 110 in the opening direction, so as shown in FIG. 4 , the clamping body 110 can be opened. Certainly, in other embodiments, the initial state of the clamping body 110 may also be an expanded state, for example, the bendable portion 1112 is in the expanded state shown in FIG. 4 without deformation. At this time, the bendable portion 1112 has at least a deformable structure capable of bending in the closing direction of the clamping body 110 , so as to be able to move to the state shown in FIG. 3 to realize the closing of the clamping body 110 . In some other embodiments, the bendable portion 1112 can have a deformation structure capable of bending toward the closing direction of the clamping body 110 and bending toward the opening direction of the clamping body 110, so that the clamping body 110 can be opened and closed. The closing process can be changed more flexibly.

Wherein, the bending deformation resistance of the clamping head 1111 is higher than that of the bendable portion 1112, so as to ensure that the clamping arm 111 provides a better bite effect to the target object. The bending deformation of the bendable part 1112 is realized through its integrated structure, for example, it can be realized by setting shrinkage seams on the bendable part 1112 that can shrink and deform, or it can be realized by changing the thickness of the material of the bendable part 1112. Of course, It can also be implemented through other integrated structures, which will be introduced in more detail later. The bending deformation of the bendable portion 1112 is reversible, that is, the bendable portion 1112 has elasticity and can rebound and reset when the external force is lost, so this bending deformation can be repeated.

The movement rod 200 is used to control the opening and clamping states of the clamping member 100 . In FIGS. 1-13, the movement rod 200 is a pull rod. The movement rod 200 is connected with the clamping body 110, and the movement of the movement rod 200 can control the movement of the clamping body 110 in the direction of opening and the direction of clamping. The transmission assembly 300 plays a role in supporting the clamping member 100 and transmitting motion and force to the moving rod 200 . Referring to FIGS. 1 and 2 , the transmission assembly 300 includes a sleeve assembly 310 and a transmission member 320 passing through the sleeve assembly 310 , and the transmission member 320 is connected to the movement rod 200 . Wherein, the disengagement body 120 of the clamping member 100 is rotatably connected to the sleeve assembly 310 , for example, mounted on the sleeve assembly 310 through a rotating seat 500 , so that the clamping member 100 can rotate relative to the sleeve assembly 310 as a whole. The bushing assembly 310 is connected with the control handle 400 , and the control handle 400 forms a linkage structure with the transmission member 320 to control the actions of the transmission member 320 , the moving rod 200 and the clamping member 100 . For example, the operator can control the handle 400 to control the rotation of the clip 100 relative to the cannula assembly 310 , and can also control the opening and closing of the clip 100 through the control handle 400 .

The movement of the movement rod 200 may be a movement along its axial direction, or a rotational movement, etc. For example, please refer to FIGS. 5-6 , in one embodiment, when the movement rod 200 moves away from the control handle 400 along its axial direction and moves close to the clamping body 110 (moving to the right as shown), the movement rod 200 can drive The clamping body 110 expands outwards, so that the clamping body 110 moves to the expanded state. Please refer to FIGS. 7-8 , in one embodiment, when the movement rod 200 approaches the control handle 400 along its axial direction and moves away from the clamping body 110 (moving to the left as shown), the movement rod 200 can drive the clamping The bodies 110 approach each other inwardly, so that the clamping bodies 110 move to the clamping state. Certainly, in other embodiments, the kinematic relationship between the moving rod 200 and the clamping body 110 may be different from that shown in FIGS. Open, when moving towards the clamping body 110, drive the clamping body 110 to close.

Wherein, no matter how the movement rod 200 moves, the movement rod 200 has a first stroke, a second stroke and a third stroke. In the first stroke, the moving rod 200 drives the clamping heads 1111 away from each other to open the clamping heads 1111 . In the second stroke, the moving rod 200 drives the clamping heads 1111 to approach each other, and the clamping body 110 moves to the clamping state to clamp the target object. In the third stroke, the clamping body 110 maintains the clamping state and separates from the moving rod 200 , and the disengagement body 120 and the clamping body 110 are separated from the first tearing portion 130 . Wherein, in the third stroke, the clamping body 110 is separated from the moving rod 200, and the disconnection of the detachment body 120 and the clamping body 110 can be realized simultaneously, or any one action can be realized before the other action.

The first stroke, the second stroke and the third stroke are three parts in the whole motion stroke of the movement rod 200, and the three strokes may be in the same direction, or at least two strokes may be in different directions. The trips can be completely separated and completely unrelated, or at least two trips can be continuous or overlapped, for example, the third trip can be closely connected to the second trip. Of course, the second stroke and the third stroke can also be two separate, non-continuous parts.

As an example, please refer to FIGS. 5-6 , at this moment, the movement rod 200 is in the first stroke, and at this time, the movement rod 200 is away from the control handle 400 along its axial direction, and is close to the clamping body 110 (the figure is directed toward Right movement), the movement rod 200 can drive the clamping body 110 to expand outward, so that the clamping body 110 moves to the opened state.

Please refer to Fig. 7-8, at this time, the movement rod 200 is in the second stroke, the movement rod 200 approaches the control handle 400 along its axial direction, and when it moves away from the clamping body 110 (moving to the left as shown), the movement rod 200 can drive the clamping bodies 110 to approach each other inwardly, so that the clamping bodies 110 move to the clamping state.

Please refer to Figures 9-13. At this time, the movement rod 200 is in the third stroke. The stroke is in the same direction as the second stroke and closely connected, that is, when the clamping body 110 moves to the clamping state, the moving rod 200 switches from the second stroke to the third stroke. Wherein, the third stroke can be further divided into a plurality of sub-strokes, and these sub-strokes include a locking stroke, an inner disengagement stroke and an outer disengagement stroke.

Please refer to FIGS. 9-10 , when the moving rod 200 switches to the third stroke until it moves to the position shown in the figure, the clamping body 110 is locked at this time, and the moving rod 200 cannot reversely move to open the clamping body 110 again. During this process, the movement stroke of the movement rod 200 is the locking stroke.

Please refer to FIGS. 11-12 , after the moving rod 200 completes the locking stroke, it enters the inner disengagement stroke. When the moving rod 200 moves to the position shown in the figure, the clamping body 110 is separated from the moving rod 200, and the moving rod 200 can no longer drive the clamping body 110 to move, losing control of the clamping body 110, and the clamping body 110 is remain locked. During this process, the movement stroke of the movement rod 200 is the inner disengagement stroke.

Please refer to FIG. 13 , after the movement rod 200 completes the inner disengagement stroke, it enters the outer disengagement stroke. When the moving rod 200 moves to the position shown in the figure, the clamping body 110 and the detachment body 120 are broken from the first tearing part 130 at this time, so far, the clamping body 110 is left on the object it clamps. The detachment body 120, the moving rod 200 and the transmission assembly 300 can be withdrawn from the target object. During this process, the movement stroke of the movement rod 200 is the outer disengagement stroke.

Of course, Figures 9-13 only show one embodiment of the third stroke, in other embodiments, the locking stroke, the inner disengagement stroke and the outer disengagement stroke can also be overlapped, for example, the inner disengagement stroke and the outer disengagement stroke Overlap, inner breakaway and outer breakaway are implemented synchronously.

In the structures shown in the above embodiments, the sleeve in the existing structure is omitted, and the clamping body 110 is directly driven by the moving rod 200, combined with the deformation state of the bendable part 1112, so as to realize the opening and closing of the clamping body 110. closure. Due to the absence of the limitation of the sleeve on the clamping arm 111, the clamping body 110 starts to deform from the bendable part 1112, and its deformation area is closer to the bottom of the entire clamping body 110. Therefore, under the same opening width requirement, the clamping body 110 The length of the one-piece clamping body 110 is shorter than the combination of the clamping arm 111 and the sleeve in the prior art. While at the same length, the one-piece clamping body 110 can open a larger angle than the combination of the clamping arm 111 and the sleeve in the prior art, and it is easier to bite the tissue of the target. After the clamping body 110 is separated from the detachment body 120, the shorter clamping body 110 stays in the target object temporarily, which can reduce the discomfort caused by the excessive length of the hemostatic clamp (or tissue clamp). It can also avoid excessive wear and tear on the target due to the excessive length of the chuck left by the hemostatic clip (or tissue clip). In addition, the one-piece structure avoids the fit clearance of parts necessary for shaft-hole fit or sliding displacement, so the bending repeatability of the clamping arm 111 is higher.

Moreover, in addition to the integral molding of the clamping body 110 itself, in this embodiment, the detachment body 120 that needs to be separated from the body of the surgical object is also integrally molded with the clamping body 110 . The entire clamping part 100 has a simple manufacturing process. Compared with the combined structure of multiple parts in the existing hemostatic clip (or tissue clip), after adopting the clamping part 100 manufactured by one-piece molding, the entire clamping device has fewer parts, a simpler structure, and lower assembly requirements. The cost has been greatly reduced, and the control accuracy is higher. Likewise, the length of the entire clip 100 is also shorter than that of the existing hemostatic clip (or tissue clip). Since the inner diameter of the endoscopic instrument channel is very limited, the clip 100 with shorter length is easier to pass through the endoscopic instrument channel.

Further, as mentioned above, the bending deformation of the bendable part 1112 is realized through its integral structure. Please refer to Figures 3, 4, 14-17, in some embodiments, the end of the clamping body 110 close to the detachment body 120 is the proximal end, and the end away from the detachment body 120 is the distal end, from the proximal end of the clamping body 110 to the The direction of its distal end is the longitudinal direction of the clamping body 110 . In order to realize the one-piece deformation structure, the deformation structure includes several first shrinkage seams 1113 arranged in sequence along the longitudinal direction.

In one embodiment, as shown in FIG. 3 , the clamping body 110 remains in the clamping state in the initial state, the first contraction joints 1113 maintain the initial state, and each part of the bendable portion 1112 does not deform. As shown in FIG. 4 , when the clamping body 110 needs to be opened, the bendable portion 1112 changes outward, and the first shrinkage seam 1113 shrinks and deforms, so that the outer side of the bendable portion 1112 (the side where the clamping arms 111 are away from each other) ) shrinks, making the entire clamping head 1111 open.

Please refer to FIGS. 3 , 4 , 14-17 , in one embodiment, the first contraction seam 1113 extends around the circumference of the bendable portion 1112 . The first contraction joints 1113 are arranged in parallel. Of course, the first contraction seams 1113 can also be arranged in other non-parallel arrangements besides being parallel to each other. The first contraction joints 1113 are uniformly arranged in parallel along the circumferential direction of the bendable portion 1112 , so that the bending deformation directions of the first contraction joints 1113 can be unified, and the bending deformation of the clamping body 110 is smoother and more stable.

In order to achieve smoother bending changes, in one embodiment, the first contraction seams 1113 are divided into several groups, and each group of first contraction seams 1113 a has at least one first contraction seam 1113 . As shown in FIGS. 3 , 4 and 14-15 , in this embodiment, each set of first shrinkage slits 1113 a has two first shrinkage slits 1113 . As shown in FIGS. 16 and 17 , in this embodiment, each set of first contraction seams 1113 a has one first contraction seam 1113 . The contraction of each first shrinkage slit 1113 can make the bendable portion 1112 have a certain bending angle, and the combination of multiple sets of first shrinkage slits 1113 can make the bendable portion 1112 have a larger opening and closing angle. The combined length of all the first shrinkage seams 1113 in the longitudinal direction determines the bending deformation area of the entire bendable part 1112, and the number of the first shrinkage seam groups 1113a and the number of adjacent first shrinkage seam groups 1113a can be flexibly set according to actual needs. The longitudinal gap and the number of first shrinkage seams 1113 in the first shrinkage seam group 1113a, etc. For example, the first shrink joint set 1113a may be 4-6 sets.

Please refer to FIG. 17 , in one embodiment, the first contraction slit 1113 is in the shape of a long groove, and the middle part of the first contraction slit 1113 has two oppositely protruding arc-shaped sides 1113a. When the clip 100 is opened to a limited position, the arc sides 1113a will contact each other, thereby determining the maximum opening angle. When the clamping member 100 is in the clamping state, the arc-shaped sides 1113 a will contact each other, thereby providing support for the clamping member 100 .

Considering the needs of minimally invasive surgery, the clipping device is usually a very fine and compact structure. Therefore, under the premise of satisfying the small size of the clipping device, the clipping member 100 is usually not suitable to use a thicker material. However, the thinner thickness requirement may lead to weakening of the strength of the bendable portion 1112. Specifically, as shown in FIG. It will cause the clamping arm 111 to break from the bendable portion 1112 . Based on this, in one embodiment, as shown in FIG. 4 , the bendable portion 1112 has a limiting structure 1114 , and the limiting structure 1114 is used to limit the maximum angle at which the bendable portion 1112 bends toward the unfolding direction. That is, within the maximum angle, the bendable portion 1112 can be bent freely. When the bending angle reaches the maximum angle, the limiting structure 1114 starts to function, restricting the bendable portion 1112 from further outward bending, and protecting the bendable portion 1112 and the clamping body 110 . The limiting structure 1114 mainly realizes limiting the maximum angle by limiting the longitudinal upper limit of the clamping body 110 .

Please refer to FIGS. 3 and 4 and FIGS. 14-17 . In one embodiment, each limiting structure 1114 includes several limiting units 1114 a arranged along the longitudinal direction of the clamping body 110 . The limiting unit 1114a includes a first limiting block 1115 and a second limiting block 1116 which are oppositely arranged. As shown in the two partial enlarged views of a and b in Figure 15, there is a gap 1117 arranged in the longitudinal direction between the first limit block 1115 and the second limit block 1116, during the bending process of the bendable part 1112 toward the opening direction , the first limiting block 1115 and the second limiting block 1116 are close to each other and form a fastening structure (see the partial enlarged view shown in b in FIG. 15 ). That is, in the initial state, there is a gap 1117 between the first limiting block 1115 and the second limiting block 1116 as shown in a in Figure 15. When the clamping body 110 is gradually opened outward, the first limiting block 1115 and the second limit block 1116 move relative to each other in the longitudinal direction, and the gap 1117 gradually becomes smaller. Finally, when the bendable part 1112 reaches the maximum angle, as shown in b in FIG. 15 , the first limit block 1115 It fits with the second limit block 1116 to form a limit.

As shown in Figs. 14-17, in one embodiment, the first limiting block 1115 and the second limiting block 1116 are two interlocking limiting hook structures. The limit hook structure can also be replaced by other structures with similar functions. As shown in Figures 3 and 4, in one embodiment, the first contraction slit 1113 is located in the middle of the circumference of the bendable part 1112, and there are at least two sets of limiting structures 1114. On the circumference of the bendable part 1112, the Limiting structures 1114 are respectively provided on both sides, which can further ensure that the entire bendable part 1112 can bend and limit synchronously.

Please refer to Figures 3, 4 and Figures 14-17. In one embodiment, in the same limiting unit 1114a, the first limiting block 1115 and the second limiting block 1116 are located on the first contraction joint 1113 on the bendable part 1112 The side wall is divided into two parts, the first limiting block 1115 and the second limiting block 1116 are connected together at one end close to the first contraction joint 1113 , and the other ends are separated from each other. When the clamping body 110 expands outward, the first limiting block 1115 and the second limiting block 1116 can also expand along with the clamping body 110 .

As shown in Figures 3, 4 and 14-15, each set of first contraction joints 1113a can be aligned with a limiting unit 1114a in the circumferential direction, so as to ensure that the limiting effect of the limiting unit 1114a can accurately act on the corresponding first The first shrinkage seam 1113 is placed on the first shrinkage seam 1113 to prevent the first shrinkage seam 1113 from shrinking and deforming after being bent to a maximum angle, which may cause the bendable portion 1112 to break.

The number of the limiting units 1114a can be more than the number of the first contraction joint group 1113a, so as to completely cover all the first contraction joints 1113 in the longitudinal direction, so as to play a better position-limiting effect. Of course, the number of the limiting units 1114a may also be less than or equal to the number of the first contraction joint group 1113a.

Further, please refer to FIGS. 14-17 , in one embodiment, there is a second shrinkage seam at least partly arranged along the circumferential direction of the bendable portion 1112 between the first limiting block 1115 and the second limiting block 1116 1118. The second shrinkage seam 1118 can separate the first limiting block 1115 and the second limiting block 1116 so that the two can move relative to each other. The second contraction joint 1118 communicates with the gap 1117 between the first limiting block 1115 and the second limiting block 1116 .

Considering that the bending movement of the clamping body 110 in the opening direction and the bending movement in the clamping direction are often accompanied by a twisting movement around its circumference, please refer to FIGS. 14-17. In one embodiment, each group The two ends of the first shrinkage seam 1113a extend into the second shrinkage seam 1118 of two longitudinally adjacent limiting units 1114a respectively, and the overlap between the first shrinkage seam 1113 and the second shrinkage seam 1118 The region forms a twisting deformation section 1119 to enable bending and twisting deformation of the bendable portion 1112 . When the twisted deformation section 1119 is provided, the bending deformation of the holding body 110 is smoother, and at the same time, the bendable portion 1112 is prevented from being broken due to torsion. By adjusting the circumferential length and longitudinal height of the twisted section 1119, the maximum opening angle, bending softness or support of the bendable portion 1112 can be further changed, which can be flexibly set according to actual needs.

In the embodiment shown in FIGS. 15 and 17, the second contraction seam 1118 is arranged in a straight line. In the embodiment shown in FIG. 16 , the second contraction joint 1118 is arranged in a U shape.

Further, as mentioned above, after the clamping body 110 clamps the target object 1 , the moving rod 200 needs to move together with the clamping body 110 to a predetermined locking structure for locking. However, in actual use, when the hardness or thickness of the human tissue clamped by the clamping body 110 is different (as shown in FIGS. 18 and 19 ), the closing angle of the clamping body 110 will be limited. Because the closing angle is related to the stroke of the moving rod 200, at this time, the clamping body 110 and the moving rod 200 cannot move to the position of the locking structure, and the clamping body 110 cannot remain in the clamping state.

For this problem, please refer to FIGS. 18 and 19 , the second contraction seam 1118 has a gap in the longitudinal direction. The second shrinkage seam 1118 of the limiting structure 1114 constitutes an adaptive floating structure capable of deforming in the clamping direction, so that when the clamping body 110 clamps the target 1, the bendable part 1112 can move in the closing direction according to the volume of the target 1 Adaptive bending deformation provides an adaptive stroke range to the movement rod 200 and the clamping body 110, increases the rigid body deformation margin of the movement rod 200, and always allows the movement rod 200 and the clamping body 110 to move to the lock of the locking structure. Stop position, to achieve accurate and reliable locking.

Specifically, please refer to FIG. 18 , when the clamping body 110 clamps a thinner target 1, the clamping body 110 can be closed normally, and the second shrinkage seam 1118 maintains a normal gap (a local enlargement as shown in a in FIG. 18 Figure) The moving rod 200 and the clamping body 110 can be accurately moved to the position of the locking structure as shown in the locking stroke above, and the clamping body 110 is locked in the clamping state. Please refer to FIG. 19, when the clamping body 110 clamps a thicker target 1, the clamping body 110 cannot be closed to the extent shown in FIG. The slit 1118 can be deformed toward the closing direction of the clamping body 110 (a partial enlarged view shown in a in FIG. 19 ). For example, in one embodiment, each second contraction seam 1118 can provide a compression of 0.02-0.05MM in the longitudinal direction. Under the number of second contraction seams 1118 shown in the figure, a plurality of second contraction seams 1118 can provide The amount of deformation is nearly 0.1-0.2 mm, so that the bendable part 1112 is bent inward as shown in Figure 19 (in Figure 19, the bendable part 1112 is slightly convex and deformed to both sides), thereby compensating the clamping body 110 The lost stroke allows the clamping body 110 to be locked to the locking structure at last.

The above-mentioned embodiment shows a structure in which the bendable portion 1112 can be bent and deformed by opening shrinkage joints. The deformable structure of the bendable portion 1112 in this embodiment is not limited thereto, and it can also be realized in other ways. For example, please refer to FIG. 20. In one embodiment, in the clamping body 110, the thickness of the bendable part 1112 can also be set to be thinner than other parts, for example, compared with the clamping head 1111 and the connecting part 112 (hereinafter referred to as will be described in detail) thinner, so that when the moving rod 200 drives the clamping body 110 to move, the bendable portion 1112 can preferentially bend and deform.

Further, in order to reduce mutual interference between the clamping bodies 110 when closing, in one embodiment, avoidance structures 1110 are provided at opposite ends of the clamping bodies 110 so as to avoid each other when the clamping bodies 110 are closed. Please refer to FIG. 16 , in this embodiment, opposite ends of the clamping bodies 110 retract inwardly to form a avoidance structure 1110 , and a avoidance groove is formed between two opposing clamping bodies 110 through the retracted area. The width of the avoidance groove gradually increases along the longitudinal direction of the clamping body 110 , wherein the avoidance groove is wider at one end close to the clamping head 1111 than at the other end. Certainly, the avoidance structure 1110 may also be other structures capable of performing avoidance functions, and is not limited to the structure shown in the figure.

Further, the moving rod 200 can be connected with the clamping body 110 through various forms of structures, as long as it can drive the clamping body 110 to move in the opening direction and the clamping direction. The movement rod 200 can be directly connected to the clamping body 110 , or can be connected to the clamping body 110 through the clamping body connecting structure 600 .

Please refer to FIGS. 6, 21 and 22. In one embodiment, the clamping body connecting structure 600 includes two connecting rods 610, and one end of the two connecting rods 610 is connected to the distal end of the moving rod 200, and at the same time can It rotates around the axis 620, and the other ends are respectively connected to the horizontal axis on the clamping head 1111, and can also rotate around the horizontal axis. The connecting rod 610 assembly is similar to a Y shape, and the purpose is to effectively transmit the thrust and pull force of the moving rod 200 moving up and down to the clamping head 1111 to realize the opening and closing control of the clamping head 1111 .

Please refer to FIG. 22 , when the moving rod 200 moves in the first stroke, as the moving rod 200 moves to the end away from the control handle 400 , the clamping body 110 can be opened toward the opening direction. Wherein, the rotation center A of the connecting rod 610 and the moving rod 200 can cross the connecting line B between the two rotation centers between the connecting rod 610 and the clamping head 1111, thereby forming self-locking, and keeping the clamping body 110 in an open state Down, it cannot be easily closed by external force, and the clamping head 1111 can only be retracted by controlling the control handle 400 .

Of course, the clamping body connection structure 600 can also be connected by other structures, for example, various connection modes of the clamping arm and the pull rod disclosed in the prior art.

Further, please refer to FIGS. 3 and 4 , in an embodiment, the clamping body 110 includes a connecting portion 112 . The connecting part 112 , the bendable part 1112 and the clamping head 1111 are sequentially connected as a whole. The first tearing part 130 is connected between the connecting part 112 and the detachment body 120 .

Please refer to FIGS. 3-13 , the connecting portion 112 has the aforementioned locking structure 1121 , and the locking structure 1121 is used to lock the clamping body 110 in the clamping state. Of course, in other embodiments, the clamping body 110 may not include the connecting portion 112, and the locking structure 1121 may be directly disposed on the bendable portion 1112 or other structures.

As mentioned above, the locking structure 1121 is used to lock the clamping body 110 in the clamping state. The locking structure 1121 can at least prevent the clamping body 110 from moving in the direction of opening, so as to ensure that the clamping body 110 is always in a clamping state. Of course, the locking structure 1121 can also prevent the clamping body 110 from moving toward the control handle 400 at the same time, which facilitates the separation of the clamping body 110 from the moving rod 200 . In order to realize the locking function, the locking structure 1121 can lock and cooperate with the moving rod 200 , the clamping body connecting structure 600 and the clamping body 110 itself.

In one embodiment, the moving rod 200 or the clamping body connection structure 600 has a locking fitting part 210, and when the moving rod 200 moves along the third stroke, the locking structure 1121 is located on the moving path of the locking fitting part 210; When the locking fitting part 210 moves to the locking structure 1121 , the two form a locking fit to keep the clamping body 110 in the clamping state.

Please refer to FIGS. 6 , 10 , 21 and 22 , in one embodiment, the holding body 110 is formed into a cylindrical structure. One end of the movement rod 200 protrudes into the cylindrical structure and is connected with the clamping body 110 . The locking matching portion 210 includes an elastic body protruding toward the clamping body 110 , and the locking structure 1121 includes a slot capable of cooperating with the elastic body. The elastic body is located in the clamping body 110 and is in a state of extrusion deformation, and the elastic body can engage with the slot under the action of elastic force.

Wherein, please refer to Fig. 6, 10, 21 and 22, the movement direction of the third stroke of the movement rod 200 is from the clamping body 110 to the detachment body 120, the elastic body is integrally formed on the shrapnel on the movement rod 200, and the shrapnel protrudes along it. The starting direction is inclined toward the distal side of the clamping body 110 . As shown in FIG. 6 , the inclined shrapnel can move along the inner wall of the clamping body 110 toward the side of the control handle 400 when the moving rod 200 moves along the third stroke, so as to prevent the shrapnel from being clamped on other parts of the holding body 110. parts. As shown in FIG. 10 , when the shrapnel moves to the position of the slot, the shrapnel can be snapped into the slot under elastic force, so as to prevent the movement rod 200 and the clamping body 110 from retracting to open the clamping state.

Of course, the elastic piece shown in this illustration is just an example of the locking fitting part 210. In other embodiments, other structures that may realize the locking function can also be used, for example, the clamping arm or the clamping arm disclosed in the prior art can be used. The locking method of the pull rod and the sleeve.

There are more than one locking structure 1121 and locking matching portion 210 . In order to lock the clamping body 110 more stably, please refer to FIGS. 21 and 22 . In one embodiment, there are more than two locking structures 1121 and locking matching parts 210 (two in the figure). In order to be evenly stressed, in one embodiment, the locking structures 1121 are evenly distributed around the circumference of the clamping body 110 (that is, the adjacent locking structures 1121 are spaced at the same angle), and the locking matching portion 210 and the clamping body 110 are opposite to each other, for example, may also be evenly distributed around the circumference of the movement rod 200 .

Further, in order to realize the internal disengagement of the clamping body 110 from the moving rod 200, please refer to FIGS. The retaining section 220 and the separating section 230 are connected as a whole through the second tearing part 240 .

The retaining section 220 is connected to the holding body 110 through the holding body connection structure 600 . The locking fit 210 is located on the retaining section 220 or on the clamping body connecting structure 600 . As shown in FIG. 12 , when the moving rod 200 is located in the inner disengagement stroke, the second tearing portion 240 breaks, and the retaining section 220 and the separating section 230 are separated. Wherein, the retaining section 220 and the clamping body 110 remain in the body of the object to be operated, while the separation section 230 is removed from the body of the object to be operated together with the detachment body 120 .

In this embodiment, the retaining section 220 and the separating section 230 are integrally formed, that is, the entire moving rod 200 is integrally processed from the same material, rather than assembled from two or more parts. Even, the above-mentioned locking fitting part 210 can also be integrally formed with the retaining section 220 and the separating section 230 . The sports bar 200 is easy to manufacture, does not require secondary assembly, has lower cost and better stability. The width of the second tearing portion 240 can be reserved according to needs, and a plurality of second tearing portions 240 can also be provided according to functional requirements, so as to make the structure more reliable and stable.

In order to assist the moving rod 200 to disengage from inside, please refer to FIGS. 22 and 24 . In one embodiment, the disengaging body 120 has a stop structure 121 , and the stop structure 121 is located on the moving path of the retaining section 220 . When the moving rod 200 moves along the third stroke, specifically, when the moving rod 200 is located in the inner disengagement stroke, the stop structure 121 prevents the retaining segment 220 from continuing to move with the separating segment 230, so as to help the retaining segment 220 and the separating segment 230 to separate .

In the embodiment shown in FIG. 24 , the moving rod 200 has a slot 260 arranged along its axial direction, and the stop structure 121 protrudes toward the moving rod 200 and extends into the slot 260 so as to move along the moving rod 200 . When the inner disengagement stroke moves, it abuts against the groove wall of the groove 260.

Further, please refer to FIG. 24 , in one embodiment, the end portion of the retaining section 220 opposite to the separation section 230 has a concave region 241 , and the second tearing portion 240 is disposed in the concave region 241 . As shown in FIGS. 23 and 24 , this design enables the second tearing portion 240 to be fractured, and its fractured surface can be accommodated in the concave region 241 , avoiding exposure of sharp burrs after the fracture, and avoiding damage to the surgical object.

In the figure, the concave region 241 has an arc-shaped end surface. In other embodiments, the concave region 241 can also be an end surface with other shapes.

Of course, the movement bar 200 can realize inner disengagement through other structures besides the above-mentioned integrally formed structure. Please refer to FIGS. 25 and 26 . In one embodiment, the movement rod 200 realizes internal detachment through a split-type combined structure. Specifically, the movement rod 200 has a snap-fit groove 281, and the snap-fit groove 281 has an opening 282 smaller than the cavity thereof, and the movement rod 200 is snap-fitted with the clamping body connection structure 600 through the snap-fit groove 281, specifically, it can be connected On the mounting shaft 620 of the connecting rod 610 . When the moving rod 200 moves along the first stroke and the second stroke, limited by the blocking effect of the opening 282, the clamping body connection structure 600 and the clamping body 110 can move together with the moving rod 200 to achieve clamping The opening and clamping of the body 110. As shown in Figure 25, when the movement rod 200 is located in the inner disengagement stroke, the clamping body 110 and the clamping body connection structure 600 are blocked, and cannot continue to move to the side of the control handle 400. At this time, under the action of an external force, the The clamping body connecting structure 600 is disengaged from the opening 282 of the clamping groove 281 , and the moving rod 200 is disengaged from the clamping body connecting structure 600 to realize internal detachment.

The above are only examples of two internal disengagement structures. In other embodiments, the moving rod 200 and the clamping body 110 can also be separated by other internal disengagement structures, such as the internal structure of the pull rod and the clamping arm in the prior art. out of structure etc.

Further, please refer to FIGS. 27-29 , in the outer detachment structure, there is at least one first tear part 130 , the end of the clamping body 110 opposite to the detachment body 120 has an inner concave area 1122 , and the first tear part 130 Located in the concave region 1122 , the detachment body 120 and the clamping body 110 are only connected through the first tearing portion. In order to bear the force uniformly, in one embodiment, the first tearing portions 130 are evenly distributed around the circumferential direction of the clamping body 110 and the separating body 120 .

Please refer to FIGS. 13 , 27-29 , in one embodiment, the detachment body 120 includes a cylindrical main body 122 and a hanging part 124 , the side wall of the main body 122 has a hanging cavity 123 , and the hanging part 124 is placed in the hanging cavity 123 . The hanging portion 124 is aligned with the first tear portion 130 .

Please refer to Figures 5, 6, 11-13, the suspension part 124 is provided with a follower 125, for example, the follower 125 is a follower shaft fixedly installed on the suspension part 124, and the follower shaft crosses the suspension part 124 superior. The follower 125 is used to drive the suspension part 124 to move together with the movement rod 200 to the side close to the control handle 400 when the movement rod 200 moves along the third stroke. Specifically, as shown in FIGS. 5 and 6 , the movement bar 200 may also have a sliding slot 250 , and the follower 125 is placed at the bottom of the sliding slot 250 . As shown in Figures 11-13, as the movement rod 200 moves to the side of the control handle 400, when the movement rod 200 enters the outer disengagement stroke, the top of the chute 250 moves to the follower 125, thereby starting to drive the follower The moving part 125 and the hanging part 124 move toward the side of the control handle 400 , thereby prompting the detachment body 120 to separate from the clamping body 110 .

Please refer to FIGS. 28 and 29 , two sides of the suspension part 124 are connected to the main body 122 through the cantilever 127 , so that the suspension part 124 can be deformed relative to the main body 122 more easily. Specifically, when the moving rod 200 moves along the outer disengagement stroke, the disengagement body 120 as a whole is supported by the rotating seat 500 and the sleeve assembly 310 and cannot move to the side of the control handle 400 alone. When the moving rod 200 pulls the hanging part 124 , the main body 122 of the detachment body 120 remains stationary, while the cantilever 127 of the hanging part 124 deforms under the pulling force of the moving rod 200 . During the deformation process of the suspension part 124 , the main body 122 of the detachment body 120 forms a reverse support for the clamping body 110 , and then the material of the suspension arm and the first tear part 130 is gradually elongated. As shown in FIG. 28 , when the yield limit is reached, fracture occurs, and the hanging portion 124 is separated from the clamping body 110 . Thereafter, the detachment body 120, the moving rod 200 and the transmission assembly 300 can be taken out from the body of the surgical object.

In order to prevent the suspension part 124 from being deformed in an undesired direction when the moving rod 200 pulls the suspension part 124, please refer to FIGS. 126 , the suspension part 124 is placed in the guide groove 126 to guide the suspension part 124 to move in the guide groove 126 . The guiding direction defined by the guiding groove 126 is aligned with the first tearing portion 130 , thereby making it easier for the hanging portion 124 to break from the first tearing portion 130 .

Further, please refer to FIGS. 1 and 2 , in terms of the transmission assembly 300 , the bushing assembly 310 may generally include a spring support sleeve 311 , and the transmission member 320 (such as a traction control wire) is passed through the spring support sleeve 311 . The moving rod 200 can be fixedly connected with the transmission member 320 through a diameter reducing adapter 321 or other structures. The spring support sleeve 311 is covered with an adapter tube 312, which is rotatably connected to the rotating base 500, and the clamping part 100 is installed on the rotating base 500, so that the entire clamping part 100 can be relative to the transmission assembly 300 together with the rotating base 500. turn.

The above uses specific examples to illustrate the present invention, which is only used to help understand the present invention, and is not intended to limit the present invention. For those skilled in the technical field to which the present invention belongs, some simple deduction, deformation or replacement can also be made according to the idea of the present invention.

Claims (21)

1. A plug-in tissue clipping device, characterized in that it includes:

   A clamping piece, the clamping piece is an integrally formed structure, which includes a clamping body and a detachment body, the clamping body includes at least two clamping arms, the clamping arms are connected, and each set of clamping The holding arm includes a clamping head and a bendable part; the bendable part has a deformation structure capable of bending toward the closing direction of the clamping body and/or bending toward the opening direction of the clamping body, and the clamping The body is connected to the detachment body through a structure that can be separated under the action of an external force applied by the operator;

   a movement rod, the movement rod is connected with the clamping body to drive the clamping body to open and close;

   A transmission assembly, the transmission assembly includes a bushing assembly and a transmission member passing through the bushing assembly, the transmission member is connected to the movement rod, and the detachment body is rotatably connected to the bushing assembly on, so that the clamping member can rotate relative to the sleeve assembly as a whole;

   and a control handle, the sleeve assembly is connected to the control handle, and the control handle forms a linkage structure with the transmission member to control the movement of the movement rod and the clamping member;

   The moving rod has a first stroke, a second stroke and a third stroke; in the first stroke, the moving rod drives the clamping heads away from each other to open the clamping heads; In the second stroke, the moving rod drives the clamping heads close to each other, and the clamping body moves to the clamping state to clamp the target; in the third stroke, the clamping body keeps clamping state, and separated from the moving rod, the disengagement body is disconnected from the clamping body.
2. The insertable tissue clipping device according to claim 1, wherein the deformation structure includes several first contraction seams, and the first contraction seams are arranged in sequence along the longitudinal direction of the clamping body.
3. The insertable tissue clamping device according to claim 2, wherein the first contraction seam is divided into several groups, and each group of the first contraction seam has at least one first contraction seam; the bendable The part has a plurality of second shrinkage seams extending along its circumferential direction, and the second shrinkage seams are arranged along the longitudinal direction; the two ends of each group of the first shrinkage seams extend into two corresponding Between the second shrinkage seams adjacent in the longitudinal direction, the overlapping area between the first shrinkage seam and the second shrinkage seam forms a distorted section, so that the bendable portion can be bent and twisted.
4. The insertable tissue clamping device according to claim 3, wherein the first contraction seam extends around the circumference of the bendable portion.
5. The insertable tissue clamping device according to claim 4, wherein the bendable portion has a limit structure, and the limit structure is used to limit the maximum bending of the bendable portion to the opening direction. angle.
6. The insertion-type tissue clipping device according to claim 5, wherein each of the limiting structures includes several limiting units arranged longitudinally along the clamping body, and the limiting units are arranged oppositely. The first limit block and the second limit block, there is a gap arranged along the longitudinal direction between the first limit block and the second limit block, and the second contraction joint communicates with the gap; During the bending process of the bendable portion toward the opening direction, the first limiting block and the second limiting block approach each other and form a buckling structure.
7. The insertable tissue clipping device according to claim 6, wherein, in the same limiting unit, the first limiting block and the second limiting block are positioned on the first limiting block by the bendable portion. The side wall on the side of a contraction joint is divided by the second contraction joint, and one end of the first limit block and the second limit block close to the first contraction joint are connected as a whole, and the other ends are separated from each other.
8. The insertable tissue clamping device according to claim 7, wherein the initial state of the clamping body is a clamping state; the second contraction seam has a gap in the longitudinal direction, and the second contraction The seam forms an adaptive floating structure capable of deforming toward the clamping direction, so that when the clamping body clamps the target, the bendable portion can automatically move toward the closing direction according to the volume of the target. Adapt to bending deformation.
9. The insertion type tissue clipping device according to any one of claims 1-8, characterized in that, the opposite ends between the clamping bodies are provided with avoidance structures, so as to avoid each other when the clamping bodies are closed.
10. The inserting tissue clamping device according to any one of claims 1-9, wherein the clamping body includes a connecting part, and the connecting part, the bendable part and the clamping head are sequentially connected as one; The clamping body is connected to the disengagement body through the connecting portion; the connecting portion has a locking structure, and the locking structure is used to lock the clamping body in the clamping state.
11. The insertion type tissue clamping device according to claim 10, wherein the clamping body forms a cylindrical structure, and one end of the moving rod extends into the cylindrical structure, and is connected with the clamping body. body connection; the moving rod has a locking fitting portion, the locking fitting portion includes an elastic body protruding toward the clamping body, and the locking structure includes a slot capable of cooperating with the elastic body, The elastic body is located in the clamping body and is in a state of extrusion deformation, and the elastic body can engage with the locking groove under the action of elastic force.
12. A clamping part of a plug-in tissue clamping device, characterized in that it includes a clamping body and a detachment body, the clamping body and the detachment body are integrally formed, and the clamping body includes at least two clamping arms , the clamping arms are connected, and each set of clamping arms includes a clamping head and a bendable part; The deformation structure is bent in the opening direction of the holding arm, and the clamping body and the detachment body are connected through a structure that can be separated under the action of an external force exerted by the operator.
13. The clip according to claim 12, wherein the deformation structure includes several first contraction seams, and the first contraction seams are arranged in sequence along the longitudinal direction of the clip body.
14. The clip according to claim 13, wherein the bendable portion has a plurality of second shrinkage seams extending along its circumference, and the second shrinkage seams are arranged along the longitudinal direction; The two ends of each group of the first contraction joints respectively extend into between two longitudinally adjacent second contraction joints, and the intersection between the first contraction joints and the second contraction joints The overlapping region forms a torsion section, so that the bendable portion can be bent torsionally deformed.
15. The clip of claim 14, wherein said first shrinkage seam extends around a circumference of said bendable portion.
16. The clip according to claim 14 or 15, wherein the first contraction joint is located in the middle of the circumference of the bendable part, and the bendable part has a limiting structure, and the limiting structure is At least two groups, in the circumferential direction of the bendable portion, limit structures are respectively provided on both sides of the bendable portion, so as to limit the maximum bending angle of the bendable portion toward the opening direction of the clamping body.
17. The clip according to claim 16, wherein each of the limiting structures includes several limiting units arranged longitudinally of the clamping body, and the limiting units include first oppositely arranged A limit block and a second limit block, there is a gap arranged along the longitudinal direction between the first limit block and the second limit block, and the second contraction joint communicates with the gap; During the bending process of the bending portion toward the opening direction, the first limiting block and the second limiting block approach each other and form a snap-fit structure.
18. The clip according to claim 17, characterized in that, in the same limiting unit, the first limiting block and the second limiting block are located on the first contraction joint on the bendable part The side wall is divided by the second contraction joint, and the first limit block and the second limit block are connected together at one end close to the first contraction joint, and the other ends are separated from each other.
19. The clamping piece according to any one of claims 16-18, characterized in that, the initial state of the clamping body is a clamping state; the second contraction joint has a gap in the longitudinal direction, and the first The two contraction joints form an adaptive floating structure capable of deforming toward the clamping direction, so that when the clamping body clamps the target, the bendable portion can automatically move toward the closing direction according to the volume of the target. Adapt to bending deformation.
20. The clip according to any one of claims 12-19, characterized in that, the detachment body has a stop structure, the stop structure is located on the moving path of the moving rod, and the stop structure is used for The movement rod abuts against the movement rod when it moves toward the control handle.
21. The clip according to any one of claims 12-20, wherein the structure capable of being separated under the action of an external force applied by the operator is a first tearing part, and the first tearing part is At least one, the opposite end of the clamping body and the detachment body has a concave area, the first tear part is arranged in the concave area, and the detachment body and the clamping body only pass through Tear connection.