WO2022257536A1

WO2022257536A1 - Insertable tissue clamping apparatus and gripping piece thereof

Info

Publication number: WO2022257536A1
Application number: PCT/CN2022/082039
Authority: WO
Inventors: 单剑; 黄俊俊; 吴海良; 陈卿业; 孙忠利
Original assignee: 宁波新跃医疗科技股份有限公司
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-12-15
Also published as: CN115884721A

Abstract

An insertable tissue clamping apparatus and a gripping piece (100) thereof, the gripping piece (100) being integrally formed. The gripping piece (100) is detachably connected to a separation base (500). In the gripping piece (100), a gripping arm (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 piece (100) and/or an opening direction of the gripping piece (100). In the structure, a sleeve is omitted, the gripping piece (100) is directly driven by a movement rod (200), and the opening and closing of the gripping piece (100) is implemented by means of the deformation state of the bendable portion (1112). Under the same opening requirements, the length of the integrally formed gripping piece (100) is shorter than the combination of a gripping arm and a sleeve.

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, the clamping piece 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 clamping arms are arranged in a claw-like structure to clamp the target; the bendable part has the ability to bend toward the closing direction of the clamping part and/or stretch toward the clamping part Deformed structures bent in the open direction;

a separation base, the separation base is connected to the clamping piece;

a movement rod connected to the clamping part to drive the clamping part to open and close;

A transmission assembly, the transmission assembly includes a sleeve assembly and a transmission member passing through the sleeve assembly, the transmission member is connected to the movement rod, and the separation base is rotatably connected to the sleeve assembly, 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 part moves to the clamping state to clamp the target; in the third stroke, the clamping part keeps clamping state, and is separated from the movement bar, and the separation base is separated from the clamping member.

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 member.

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 member, 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, in the same limiting unit, the first limiting block and the second limiting block pass through the first limiting block through the side wall on the side of the first contraction joint on the bendable part. The two contraction joints are divided, 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.

In one embodiment, the initial state of the clamping member 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 member clamps the target, the bendable portion can adaptively bend and deform in the closing direction according to the volume of the target.

In one embodiment, the clamping part includes a connecting part, and the connecting part, the bendable part and the clamping head are sequentially connected as one; the clamping part is detachably connected to the separation base through the connecting part; The connecting portion has a locking structure, and the locking structure is used to lock the clamping member in the clamping state.

In one embodiment, the movement rod, the clamping part or the clamping part connection structure connecting the movement rod and the clamping part is provided with a locking fitting part, and the movement rod along the third When the stroke moves, the locking structure is located on the moving path of the locking matching part; when the locking matching part moves to the locking structure, the two form a locking cooperation, and the clamping The piece remains in the clamped state.

In one embodiment, the clamping part forms a cylindrical structure, and one end of the movement rod extends into the cylindrical structure and is connected with the clamping part; The elastic body protruding from the clamping part, the locking structure includes a slot that can cooperate with the elastic body, the elastic body is located in the clamping part, and is in a state of extrusion deformation, the elastic The body can be engaged with the card slot under the action of elastic force.

Based on the above purpose, an embodiment of the present application provides a clamping part of a plug-in tissue clamping device, the clamping part is integrally formed, the clamping part includes at least two clamping arms, the The clamping arms are connected, and each set of the clamping arms includes a clamping head and a bendable part, and the clamping arms are arranged in a claw-type structure to clamp the target; the bendable part has a A deformation structure that bends toward the closing direction of the clamping arm and/or bends toward the opening direction of the clamping arm.

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, the first limit block and the second limit block are formed by dividing the side wall of the bendable part on the side of the first contraction joint through the second contraction joint. One end of the first limiting block and the second limiting block close to the first contraction joint are integrated, and the other ends are separated from each other.

Beneficial effect

According to the insertion type tissue clipping device of the above-mentioned embodiment, it includes an integrally formed clamping part. The clamp includes a clamp and a separation base. In the clamping piece, 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 piece and/or bending toward the opening direction of the clamping piece. In this structure, the sleeve in the existing structure is omitted, and the clamping part 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 part. Under the same opening width requirement, the length of the one-piece clamping part is shorter than the combination of the clamping arm and the sleeve in the prior art. 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

Fig. 1 is a schematic structural diagram of the plug-in tissue clipping device in an embodiment of the present application, in which the transmission components are omitted;

Fig. 2 is a schematic structural view of the clamping member in a clamping state in an embodiment of the present application;

Fig. 3 is a schematic structural view of the clamping member in an open state in an embodiment of the present application;

Fig. 4 is a schematic diagram of the structure of the plug-in tissue clipping device in an open state (the movement rod moves in the first stroke) in an embodiment of the present application;

Fig. 5 is a schematic structural view of a part of the clamping member cut away in the state shown in Fig. 4;

Fig. 6 is a schematic structural view 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);

Fig. 7 is a schematic structural view of part of the structure partially cut away in the state shown in Fig. 6;

Fig. 8 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;

Fig. 9 is a schematic structural view of part of the structure partially cut away in the state shown in Fig. 8;

Fig. 10 is a schematic diagram of the structure of the plug-in tissue clamping device in an embodiment of the present application when the moving rod is in the clamping state and the moving rod is separated from the clamping part (the moving rod moves in the third stroke);

Fig. 11 is a schematic structural view of part of the structure partially cut away in the state shown in Fig. 10;

Fig. 12 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 and the clamping part is separated from the separation base (the movement rod moves in the third stroke);

Fig. 13 is a schematic structural view of part of the structure partially cut away in the state shown in Fig. 12;

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

Fig. 15 is an enlarged schematic diagram of the deformation structure of the bendable part in the embodiment shown in Fig. 14;

Fig. 16 is an enlarged schematic view of the deformation structure of the bendable part in another embodiment of the present application;

Fig. 17 is an enlarged schematic view of the deformation structure of the bendable part in another embodiment of the present application;

Fig. 18 is a schematic diagram of the deformation structure of the bendable part when the clamping member clamps thin tissue in an embodiment of the present application;

Fig. 19 is a schematic diagram of the deformation structure of the bendable part when the clamping member clamps a thicker tissue in an embodiment of the present application;

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

Fig. 21 is a schematic structural view of the clamping head in an open and self-locking 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 steps or actions 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.

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 , a control handle 400 and a separation base 500 .

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. The one-piece molded structure 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.

Referring to FIGS. 2 and 3 , the clamping member 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. 2 and 3 . In one embodiment, the bendable portion 1112 is a semi-cylindrical structure, and when the clip 110 is closed, the bendable portion 1112 can be enclosed into 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 clip 110 and/or bending toward the opening direction of the clip 110 . Please refer to FIGS. 1 and 2 . In the illustrated embodiment, the initial state of the clamping member 110 is the clamping state, that is, the clamping member 110 is in the clamping state when the bending portion 1112 is not deformed. At this time, the bendable portion 1112 at least has a deformable structure capable of bending in the opening direction of the clip 110 , so as shown in FIG. 3 , the clip 110 can be opened. Certainly, in other embodiments, the initial state of the clamping member 110 may also be an expanded state, for example, the clamping member 110 is in the expanded state shown in FIG. 3 when the bendable portion 1112 is not deformed. At this time, the bendable portion 1112 has at least a deformable structure capable of bending in the closing direction of the clip 110 , so as to be able to move to the state shown in FIG. 2 to realize the closing of the clip 110 . In some other embodiments, the bendable portion 1112 can have a deformable structure capable of bending toward the closing direction of the clip 110 and the opening direction of the clip 110, so that the clip 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. In other embodiments, the exercise bar 200 may also have other structures. The movement rod 200 is connected with the clamping member 110, and the movement of the movement rod 200 can control the movement of the clamping member 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 .

Please refer to FIGS. 1 , 4 and 5 , 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 . The detachable connection between the clamping part 100 and the separation base 500 ensures that the clamping part can be disengaged from the separation base 500 when needed.

The separation base 500 is rotatably connected to the sleeve assembly 310 , for example, as shown in FIGS. 4 and 5 , the separation base 500 is sheathed in the sleeve assembly 310 . The connection between the separation base 500 and the clamping member 100 allows both to rotate in the circumferential direction of the sleeve assembly 310 , 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. 4 and 5. 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 member 100 (moving to the right as shown), the movement rod 200 can drive The clamping part 100 is opened outwards, so that the clamping part 100 moves to the opened state. Please refer to FIGS. 6 and 7. In one embodiment, when the movement rod 200 approaches the control handle 400 along its axial direction and moves away from the clamping member 100 (moving to the left as shown), the movement rod 200 can drive the clamping The pieces 100 approach each other inwardly, so that the clamping pieces 100 move to the clamping state. Certainly, in other embodiments, the movement relationship between the movement rod 200 and the clamping member 100 may be different from that shown in FIGS. Open, when moving towards the clamping part 100, drive the clamping part 100 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 member 100 moves to the clamping state to clamp the target object. In the third stroke, the clamping member 100 maintains the clamping state and is separated from the moving rod 200 , and the separation base 500 is separated from the clamping member 100 . The separation of the clamping part 100 and the moving rod can be adopted but not limited to: disengaging through the connection structure between the clamping part 100 and the moving rod or disconnecting the clamping part 100 and a part of the moving rod together with the other part of the moving rod, etc. way to achieve. Wherein, in the third stroke, the clamping part 100 is separated from the moving rod 200, the separation of the separation base 500 and the clamping part 100 can be realized at the same time, or any 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 can be in the same direction, or at least two strokes can be in different directions, or three strokes are in different directions. Each stroke can be completely separated and completely unrelated, or at least two strokes can be continuous or overlapped, for example, the third stroke can be closely connected with the second stroke, and immediately enter the third stroke after finishing the second stroke . Of course, the second stroke and the third stroke can also be two separate, non-continuous parts.

As an example, please refer to FIGS. 4 and 5. At this time, the movement rod 200 is in the first stroke, and the movement rod 200 is away from the control handle 400 along its axial direction, and is close to the clamping member 100 (to the right in the illustration). When moving, the moving rod 200 can drive the clamping part 100 to expand outward, so that the clamping part 100 moves to the opened state.

6 and 7, at this moment, 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 member 100 (to the left in the figure), the movement rod 200 can drive the clamping parts 100 inwardly close to each other, so that the clamping parts 100 move to the clamping state.

Please refer to Fig. 8-13, at this time, the movement rod 200 is in the third stroke, the movement rod 200 approaches the control handle 400 along its axial direction, and when The stroke is in the same direction as the second stroke and closely connected, that is, when the clamping member 100 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. 8 and 9 , when the moving rod 200 is switched to the third stroke until it moves to the position shown in the figure, the clamping member 100 is locked at this time, and the moving rod 200 cannot reversely move to open the clamping member 100 again. During this process, the movement stroke of the movement rod 200 is the locking stroke.

Please refer to FIGS. 10 and 11 , after the movement lever 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 part 100 is separated from the moving rod 200 at this time, and the moving rod 200 can no longer drive the clamping part 100 to move, losing control of the clamping part 100, and the clamping part 100 is remain locked. During this process, the movement stroke of the movement rod 200 is the inner disengagement stroke.

Please refer to FIGS. 12 and 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 part 100 is separated from the separation base 500 at this moment, and so far, the clamping part 100 is left on the object it clamps. The separation base 500, the moving rod 200 and the transmission assembly 300 can be withdrawn from the body of the test object. During this process, the movement stroke of the movement rod 200 is the outer disengagement stroke.

Of course, Figures 8-13 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 part 100 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 part 100. closure. Due to the absence of the limitation of the sleeve on the clamping arm, the clamping arm 110 starts to deform from the bendable part 1112, and its deformation area is closer to the bottom of the entire clamping part 100. Therefore, under the same opening width requirements, the integrated The length of the type clamp 100 is shorter than that of prior art clamp arm and sleeve combinations. With the same length, the one-piece clamping member 100 can open a larger angle than the combination of the clamping arm and the sleeve in the prior art, and it is easier to bite the tissue of the target. After the clip 100 is disengaged from the separation base 500, the shorter clip 100 stays in the target object temporarily, which can reduce the discomfort caused by the long clip left by the hemostatic clip (or tissue clip) It can also try to avoid the problem of excessive wear on the target caused by 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 110 is higher.

Moreover, the manufacturing process of the entire clip 100 is simple. 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 FIGS. 2, 3, 5, 14-17. In some embodiments, the end of the clamping member 100 close to the separation base 500 is the proximal end, and the end away from the separation base 500 is the distal end. From the clamping member 100 The direction from the proximal end to the distal end is the longitudinal direction of the clip 100. 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. 2 , the clamping member 100 remains in the clamping state in the initial state, the first contraction joints 1113 maintain the initial state, and the parts of the bendable portion 1112 do not deform. As shown in FIG. 3 , when the clamping member 100 needs to be opened, the bendable portion 1112 changes outward, and the first contraction seam 1113 shrinks and deforms, so that the outer side of the bendable portion 1112 (the side where the clamping arms 110 are away from each other) ) shrinks, making the entire clamping head 1111 open.

Please refer to FIGS. 2 , 3 , 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 member 100 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. 2 and 3 and FIGS. 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 110 to break from the bendable portion 1112 . Based on this, in one embodiment, as shown in FIG. 3 , 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 to restrict the bendable portion 1112 from further outward bending, thereby protecting the bendable portion 1112 and the clamping member 100 . The limiting structure 1114 mainly realizes limiting the maximum angle by limiting the longitudinal upper limit of the clip 100 .

Please refer to FIG. 3 and FIGS. 14-17 , in one embodiment, each limiting structure 1114 includes several limiting units 1114 a arranged along the longitudinal direction of the clip 100 . 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 FIG. 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 Fig. 3, in one embodiment, the first shrinkage seam 1113 is located in the middle of the circumference of the bendable part 1112, and the limiting structures 1114 are at least two groups, on the circumference of the bendable part 1112, on both sides of the bendable part 1112 Position-limiting structures 1114 are provided respectively, which can further ensure that the entire bendable part 1112 can bend and limit synchronously.

Please refer to FIG. 3 and FIGS. 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 side of the first contraction joint 1113 on the bendable part 1112. The side wall of the first limit block 1115 and the second limit 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 member 100 is opened outward, the first limiting block 1115 and the second limiting block 1116 can also expand along with the clamping member 100 .

As shown in Figure 3 and Figures 14-15, each group of first contraction joints 1113a can be aligned with a limiting unit 1114a in the circumferential direction, so as to ensure that the position-limiting action of the limiting unit 1114a can accurately act on the corresponding first contraction joints 1113, so as to prevent the first shrinkage seam 1113 from continuing to shrink and deform after being bent to the maximum angle, causing the bendable part 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 member 100 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 set 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 clip 100 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 part 100 clamps the target object 1, the moving rod 200 needs to move together with the clamping part 100 to a predetermined locking structure for locking. However, in actual use, when the hardness or thickness of the human tissue clamped by the clamping component 100 is different (as shown in FIGS. 17 and 18 ), the closing angle of the clamping component 100 will be limited. Because the closing angle is associated with the stroke of the moving rod 200, at this time, the clamping part 100 and the moving rod 200 cannot move to the position of the locking structure, and the clamping part 100 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 member 100 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 part 100, increases the rigid body deformation margin of the movement rod 200, and always allows the movement rod 200 and the clamping part 100 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 member 100 clamps a thinner target 1, the clamping member 100 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 part 100 can be accurately moved to the position of the locking structure as shown in the locking stroke above, and the clamping part 100 is locked in the clamping state. Please refer to Fig. 19, when the clamping part 100 clamps a thicker target 1, the clamping parts 100 cannot be closed to the extent shown in Fig. 18, at this time, continue to pull the movement rod 200, the second contraction The slit 1118 can be deformed toward the closing direction of the clip 100 (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 approximately 0.1-0.2 mm, so that the bendable part 1112 bends inward as shown in Figure 19 (in Figure 19, the bendable part 1112 is slightly convex and deformed to both sides), thereby compensating the clip 100 The lost stroke allows the clip 100 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 member 100, 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 120 (hereinafter referred to as will be described in detail) thinner, so that when the moving rod 200 drives the clamping member 100 to move, the bendable portion 1112 can preferentially bend and deform.

Further, in order to reduce mutual interference between the clamping pieces 100 when they are closed, in one embodiment, avoidance structures 1110 are provided at opposite ends of the clamping pieces 100 so as to avoid each other when the clamping pieces 100 are closed. Please refer to FIG. 16 , in this embodiment, opposite ends of the clamping pieces 100 retract inwardly to form a avoidance structure 1110 , and a avoidance groove is formed between two opposing clamping pieces 100 through the retracted area. The width of the escape groove gradually increases along the longitudinal direction of the clamping member 100 , wherein, one end of the avoidance groove near the clamping head 1111 is wider than 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 member 100 through various forms of structures, as long as it can drive the clamping member 100 to move in the opening direction and the clamping direction. The movement rod 200 can be directly connected with the clamping part 100 , or can be connected with the clamping part 100 through the clamping part connecting structure 600 .

Please refer to FIGS. 5 and 21. In one embodiment, the clamping member connecting structure 600 includes two connecting rods 610. One end of the two connecting rods 610 is connected together at the distal end of the moving rod 200, and at the same time, it can rotate around the axis. 620 rotates, and the other end is respectively connected with 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. 21 , 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 member 100 can be opened in 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, so that the clamping member 100 is kept 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 member 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. 2 , 3 and 5 , in one embodiment, the clip 100 includes a connecting portion 120 . The connecting part 120 , the bendable part 1112 and the clamping head 1111 are sequentially connected as a whole. The separation base 500 is detachably connected to the connecting portion 120 .

Please refer to FIGS. 2-13 , the connecting portion 120 has the aforementioned locking structure 121 , and the locking structure 121 is used to lock the clamping member 100 in the clamping state. Of course, in other embodiments, the clip 100 may not include the connecting portion 120, and the locking structure 121 may be directly disposed on the bendable portion 1112 or other structures.

As mentioned above, the locking structure 121 is used to lock the clamping member 100 in the clamping state. The locking structure 121 can at least prevent the clamping member 100 from moving toward the opening direction, so as to ensure that the clamping member 100 is always in a clamping state. Certainly, the locking structure 121 can also prevent the clamping part 100 from moving toward the control handle 400 at the same time, which facilitates the disengagement of the clamping part 100 from the moving rod 200 . In order to realize the locking function, the locking structure 121 can lock and cooperate with the moving rod 200 , the clamping member connection structure 600 and the clamping member 100 itself.

In one embodiment, the moving rod 200 or the clamping member connection structure 600 has a locking fitting part 631, and when the moving rod 200 moves along the third stroke, the locking structure 121 is located on the moving path of the locking fitting part 631; When the locking fitting part 631 moves to the locking structure 121 , the two form a locking fit to keep the clip 100 in the clipping state.

Please refer to FIGS. 4-13 , in an embodiment, the clamping member 100 is formed into a cylindrical structure. One end of the movement rod 200 protrudes into the cylindrical structure and is connected with the clamping member 100 . The locking matching portion 631 includes an elastic body protruding toward the clamping member 100 , and the locking structure 121 includes a slot capable of cooperating with the elastic body. The elastic body is located in the clamping member 100 and is in a state of extrusion and deformation, and the elastic body can engage with the slot under the action of elastic force.

Wherein, please refer to Fig. 8-13, the movement direction of the third stroke of the moving rod 200 is from the clamping member 100 to the separation base 500, the elastic body is integrally formed on the elastic piece on the moving rod 200, and the elastic piece moves along its protruding direction. The distal side of the clip 100 is inclined. As shown in FIGS. 8-13 , the inclined shrapnel can move along the inner wall of the clamping member 100 toward the side of the control handle 400 when the movement rod 200 moves along the third stroke, so as to prevent the shrapnel from being clamped on the clamping member 100 other parts of. As shown in FIGS. 9 and 13 , when the elastic piece moves to the slot position, the elastic piece can be locked into the slot under elastic force, so as to prevent the movement rod 200 and the clamping member 100 from retracting to open the clamping state.

Specifically, please refer to FIG. 13 , in one embodiment, the locking fitting portion 631 is provided on a cylindrical body 630 , which is a part of the clamping member connecting structure 600 , which can be connected to the connecting structure through the shaft 620 . The rod 610 forms a linkage structure. The moving rod 200 passes through the cylindrical body 630 and is connected with the shaft 620 . The cylindrical body 630 can follow the movement rod 200 and move toward the side of the control handle 400 until it is locked by the locking structure. When the locking matching portion 631 is locked on the locking structure, the connecting rod 610 and the clamping member 100 connected thereto cannot move toward the opening direction.

Of course, the elastic piece shown in this illustration is only an example of the locking fitting part 631. 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.

In order to lock the clip 100 more stably, please refer to FIG. 13 , in one embodiment, there are more than two locking structures 121 and locking matching parts 631 (two in the figure). In order to be evenly stressed, in one embodiment, the locking structures 121 are evenly distributed around the circumference of the clamping member 100 (that is, the intervals between adjacent locking structures 121 are the same angle), and the locking matching portion 631 and the clamping member 100 are opposite to each other, for example, they may also be evenly distributed around the circumference of the movement rod 200 .

Further, please refer to FIGS. 5 , 11 and 13 , in one embodiment, in order to install the separation base 500 , the connecting portion 120 is provided with a clamping portion 122 , and the separation base 500 has a leg 510 . The supporting leg 510 is engaged with the engaging portion 122 . The movement bar 200 has a push top 283. When the movement bar 200 moves along the third stroke, the separation base 500 is arranged on the moving path of the push top 283, and the push top 283 can push the separation base 500 to move toward the control handle 400 side. To separate the connection part 120 and the base 500 . Please refer to Figures 11 and 13, for example, the separation base 500 has a raised portion 530 positioned on the moving path of the push top 283, the raised portion 530 can be the bottom of the cylindrical separation base 500, and the bottom has a hole for movement. A through hole through which the rod 200 passes. In order to connect the separation base 500 with the connection part 120, a bent buckle can be provided on the leg 510, and the buckle 122 can be a slot matched with the buckle. connect. Under the push of the push top 283 for this connection, the buckle can be deformed, so as to be detached from the buckle portion 122 .

Further, please refer to FIGS. 5-13 , in an 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 member 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 member connection structure 600 and the clamping member 100 can move together with the moving rod 200 to achieve clamping The expansion and clamping of the piece 100. As shown in Figure 25, when the moving rod 200 is located in the inner disengagement stroke, the clamping part 100 and the connecting structure 600 of the clamping part are blocked and cannot continue to move to the side of the control handle 400. At this time, under the action of external force, the The clamping member connection structure 600 is disengaged from the opening 282 of the clamping groove 281 , and the moving rod 200 is disengaged from the clamping member connection structure 600 to achieve inner disengagement.

The above is only an example of an internal detachment structure, and in other embodiments, the movement rod 200 may also be an integrally formed structure. For example, in one embodiment, the movement rod 200 has a retaining section and a separating section, and the retaining section and the separating section are connected as a whole through a second tearing part. The retaining section is connected with the holding body, and the locking matching part is located on the retaining section. When the moving rod 200 moves along the third stroke, the second tearing part breaks, and the retaining section and the separating section are separated. In addition, the moving rod 200 and the clamping member 100 can also be separated by using other internal disengagement structures, such as the internal disengagement structure of the pull rod and the clamping arm in the prior art.

Further, please refer to FIGS. 1 and 5 , 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 a connecting pipe 312 , and the connecting pipe 312 is provided with a fixing seat 313 . The connecting pipe 312 is rotatably connected with the separation base 500 and the clamping part 100 , so that the entire clamping part 100 can rotate relative to the transmission assembly 300 together with the separation base 500 .

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

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

A clamping piece, the clamping piece is an integrally formed structure, the clamping piece 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 clamping arms are arranged in a claw-like structure to clamp the target; the bendable part has the ability to bend toward the closing direction of the clamping part and/or stretch toward the clamping part Deformed structures bent in the open direction;

a separation base, the separation base is connected to the clamping piece;

a movement rod connected to the clamping part to drive the clamping part to open and close;

A transmission assembly, the transmission assembly includes a sleeve assembly and a transmission member passing through the sleeve assembly, the transmission member is connected to the movement rod, and the separation base is rotatably connected to the sleeve assembly, 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 part moves to the clamping state to clamp the target; in the third stroke, the clamping part keeps clamping state, and is separated from the movement bar, and the separation base is separated from the clamping member.
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 member.
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.
The insertable tissue clipping device according to claim 3, wherein the first shrinkage seam extends around the circumference of the bendable portion; the bendable portion has a limiting structure, and the limiting structure It is used to limit the maximum angle at which the bendable portion bends toward the unfolding direction.
The insertion-type tissue clipping device according to claim 4, wherein each of the limiting structures includes several limiting units arranged longitudinally along the clamping member, 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 snap-fit structure.
The insertion type tissue clipping device according to claim 5, wherein in the same limiting unit, the first limiting block and the second limiting block are located on the first limiting block on the bendable part. 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.
The insertable tissue clamping device according to claim 6, wherein the initial state of the clamping member is a clamping state; the second contraction seam has a gap in the longitudinal direction, and the second contraction seam The seam forms an adaptive floating structure capable of deforming toward the clamping direction, so that when the clamping member clamps the target, the bendable portion can automatically move toward the closing direction according to the volume of the target. Adapt to bending deformation.
The insertion type tissue clipping device according to any one of claims 1-7, wherein the opposite ends between the clamping parts are provided with avoidance structures, so as to avoid each other when the clamping parts are closed.
The insertion type tissue clamping device according to any one of claims 1-8, wherein the clamping member includes a connecting part, and the connecting part, the bendable part and the clamping head are sequentially connected as one; The clamping part is detachably connected to the separation base through the connecting part; the connecting part has a locking structure, and the locking structure is used to lock the clamping part in the clamping state.
The plug-in tissue clamping device according to claim 9, characterized in that, a locking fit is provided on the moving rod, the clamping part or the clamping part connection structure connecting the moving rod and the clamping part part, when the moving rod moves along the third stroke, the locking structure is located on the moving path of the locking matching part; when the locking matching part moves to the locking structure, The two form a locking fit to keep the clamping member in the clamping state.
The insertion-type tissue clipping device according to claim 10, wherein the clamping member forms a cylindrical structure, and one end of the moving rod extends into the cylindrical structure and connects with the clamping The locking fitting part includes an elastic body protruding toward the clamping part, the locking structure includes a slot that can cooperate with the elastic body, and the elastic body is located on the clamping part and in a state of extrusion deformation, the elastic body can engage with the slot under the action of elastic force.
The inserting type tissue clamping device according to claim 11, wherein the movement direction of the third stroke of the movement rod is from the clamping member to the separation base, and the elastic body has a The elastic piece connected with the clamping piece is inclined to the side of the distal end of the clamping piece along its protruding direction.
A clamping part of a plug-in tissue clamping device, characterized in that the clamping part is integrally formed, and the clamping part includes at least two clamping arms, and the clamping arms are connected, each The set of clamping arms includes a clamping head and a bendable part, and the clamping arms are arranged in a jaw-like structure to clamp the target; the bendable part has a closing A deformation structure that bends in a direction and/or bends toward the opening direction of the clamping arm.
The clip according to claim 13, 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.
The clip according to claim 14, 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 and torsionally deformed.
The clip according to claim 15, wherein the first shrinkage seam extends around the circumference of the bendable part; the bendable part has a position-limiting structure, and the bendable part Upward, at least one side of the bendable portion is provided with the limiting structure, so as to limit the maximum angle of bending of the bendable portion toward the opening direction of the clamping member.
The clip according to claim 16, wherein each of the limiting structures comprises a plurality of limiting units arranged longitudinally of the clamping member, and the limiting units include oppositely arranged first 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.
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 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.
The clamping part according to claim 18, wherein the initial state of the clamping part is a clamping state; the second shrinkage seam has a gap in the longitudinal direction, and the second shrinkage seam can be composed of an adaptive floating structure that deforms toward the clamping direction, so that when the clamping member clamps the target, the bendable portion can adaptively bend and deform toward the closing direction according to the volume of the target .
The clip according to any one of claims 13-19, wherein the opposite ends between the clips are provided with avoidance structures, so as to avoid each other when the clips are closed.