CN115884721A

CN115884721A - Plug-in tissue clamping device and clamping piece thereof

Info

Publication number: CN115884721A
Application number: CN202280005427.3A
Authority: CN
Inventors: 单剑; 黄俊俊; 吴海良; 陈卿业; 孙忠利
Original assignee: Ningbo Xinwell Medical Technology Co Ltd
Current assignee: Ningbo Xinwell Medical Technology Co Ltd
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2023-03-31
Also published as: WO2022257536A1

Abstract

An insertion type tissue clamping and closing device and a clamping piece (100) thereof, wherein the clamping piece (100) is integrally formed. The clamping piece (100) and the separation base (500) are detachably connected. In the clamp (100), the clamp arm (110) comprises a clamp head (1111) and a bendable part (1112), and the bendable part (1112) has a deformation structure capable of bending to the closing direction of the clamp (100) and/or bending to the opening direction of the clamp (100). In the structure, the sleeve is omitted, the moving rod (200) directly drives the clamping piece (100) and the bendable part (1112) is combined with the deformation state, so that the clamping piece (100) is opened and closed. The length of the integrally formed clip (100) is shorter than the clip arm and sleeve combination for the same open width requirement.

Description

Plug-in tissue clamping device and clamping piece thereof

Technical Field

The application relates to the field of medical equipment, in particular to a structure of an insertion type tissue clamping and closing device for operation.

Background

The inserted tissue clamping device is an inserted medical apparatus and instrument for clamping and closing the tissue in human body or animal body to stop bleeding or close, and comprises a hemostatic clamp, a tissue clamp and the like.

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

One type of hemostatic clip (or tissue clip) is known in the art that is primarily opened and held by engagement of the clamping arms with the sleeve, and specifically, the left and right clamping arms are loosely assembled together by a pin, and when the clamping arm assembly is pulled in a proximal direction, the clamping arms are gradually retracted into the sleeve and engage the front edge of the sleeve. And limited by the outer diameter of the sleeve, the sleeve applies reverse extrusion force to the clamping arms, and the clamping arms elastically deform inwards to close. When the gripper arm assembly is moved distally, the gripper arms are pushed out of the sleeve and automatically re-open due to their elastic restoring force, so that the gripper device can be opened and closed repeatedly. The structure utilizes the axial space of the sleeve to realize the closing of the clamping arms, so that a part of the clamping arms must be contracted in the sleeve, the whole length of the hemostatic clamp remained in a patient body is longer after the separation of the hemostatic clamp, and the injury and discomfort to the patient are more easily caused.

In another type of hemostatic clip (or tissue clip), the arms are connected primarily by a rotating shaft, and then a sliding up and down track is provided in the sleeve, along which the shaft slides. The upper end of the sleeve is also provided with a fixed shaft, the clamping arm is provided with a long hole, and the fixed shaft simultaneously penetrates through the long hole of the clamping arm. The sliding shaft is pushed and pulled to drive the two clamping arms to move up and down, and the clamping arms are forced to move along the path of the long-strip-shaped hole after being blocked by the fixing shaft, so that the opening and the closing are realized. The structure improves the control precision, the size of the clamp becomes smaller, but the number of parts is large, the structure becomes complex, and the cost is high. The overall length of the clamp is still larger on the premise of the same scutching. Therefore, the overall size of the clamp is longer, the passage of an endoscope instrument channel is not facilitated, and the foreign body sensation of the whole clamp when a human body stays is obvious.

Technical problem

The present application provides an insertable tissue clamping device and holder therefor to demonstrate a new opening and clamping configuration.

Technical solution

In accordance with one embodiment of the present application, there is provided an insertion type tissue clamping device, comprising:

the clamping piece is of an integrally formed structure and comprises at least two clamping arms, each group of clamping arms comprises a clamping head and a bendable part, and the clamping arms are arranged in a clamping jaw type structure to clamp a target object; the bendable part has a deformation structure capable of bending toward a closing direction of the clamp and/or bending toward an opening direction of the clamp;

a separation base connected with the clamp;

the moving rod is connected with the clamping piece so as to drive the clamping piece to open and close;

the transmission component comprises a sleeve component and a transmission component penetrating through the sleeve component, the transmission component is connected with the moving rod, and the separation base is rotatably connected to the sleeve component so that the clamping component can integrally rotate relative to the sleeve component;

the sleeve assembly is connected with the control handle, and the control handle and the transmission piece form a linkage structure so as to control the motion of the motion rod and the clamping piece;

the motion bar has a first stroke, a second stroke, and a third stroke; in the first stroke, the moving rod drives the clamping heads to move away from each other so as to open the clamping heads; in the second stroke, the moving rod drives the clamping heads to approach each other, and the clamping piece moves to a clamping state to clamp the target object; in the third stroke, the clamp member maintains the clamped state and is separated from the moving rod, and the separation base is separated from the clamp member.

In one embodiment, the deformation structure comprises a plurality of first shrinkage joints, and the first shrinkage joints are sequentially arranged along the longitudinal direction of the clamping piece.

In one embodiment, the first shrink seams are divided into groups, each group of the first shrink seams having at least one first shrink seam; the bendable part is provided with a plurality of second shrinkage joints which extend along the circumferential direction of the bendable part, and the second shrinkage joints are arranged along the longitudinal direction; and two ends of each group of first shrinkage joints correspondingly extend into the space between two second shrinkage joints adjacent in the longitudinal direction respectively, and a twisting deformation section is formed in an overlapping area between the first shrinkage joints and the second shrinkage joints, so that the bendable part can be bent, twisted and deformed.

In one embodiment, each limiting structure comprises a plurality of limiting units which are arranged along the longitudinal direction of the clamping piece, each limiting unit comprises a first limiting block and a second limiting block which are arranged oppositely, a gap which is arranged along the longitudinal direction is formed between the first limiting block and the second limiting block, and the second contraction joint is communicated with the gap; and in the bending process of the bendable part towards the opening direction, the first limiting block and the second limiting block are close to each other and form a buckling structure.

In one embodiment, in the same limiting unit, the first limiting block and the second limiting block are formed by dividing the side wall of the bendable portion, which is located on the side of the first contraction joint, by the second contraction joint, and one ends of the first limiting block and the second limiting block, which are close to the first contraction joint, are connected into 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 shrinkage joint has a clearance in the longitudinal direction, and the second shrinkage joint constitutes an adaptive floating structure capable of deforming in the clamping direction, so that the bendable portion can be adaptively bent and deformed in the closing direction according to the volume of the object when the object is clamped by the clamping member.

In one embodiment, the clamping piece comprises a connecting part, and the connecting part, the bendable part and the clamping head are sequentially connected into a whole; the clamping piece is detachably connected with the separation base through the connecting part; the connecting part is provided with a locking structure, and the locking structure is used for locking the clamping piece in the clamping state.

In one embodiment, the motion rod, the clamping piece or the clamping piece connecting structure connecting the motion rod and the clamping piece is provided with a locking matching part, and when the motion rod moves along the third stroke, the locking structure is positioned on a moving path of the locking matching part; when the locking matching part moves to the locking structure, the locking matching part and the locking structure form locking matching to keep the clamping piece in a clamping state.

In one embodiment, the clamping piece forms a cylindrical structure, and one end of the motion rod extends into the cylindrical structure and is connected with the clamping piece; the locking cooperation portion includes the orientation the protruding elastomer that sets up of holder, the locking structure including can with elastomer complex draw-in groove, the elastomer is located in the holder to be in the extrusion deformation state, the elastomer can under the elastic force effect with the draw-in groove joint.

In view of the above, an embodiment of the present application provides a clamping member of an insertion type tissue clamping device, the clamping member is an integrally formed structure, the clamping member includes at least two clamping arms connected to each other, each group of the clamping arms includes a clamping head and a bendable portion, and the clamping arms are arranged in a jaw structure to clamp an object; the bendable portion has a deformation structure capable of bending toward a closing direction of the gripper arms and/or bending toward an opening direction of the gripper arms.

In one embodiment, the bendable portion has a plurality of second shrinkage joints extending along a circumferential direction of the bendable portion, and the second shrinkage joints are arranged along the longitudinal direction; and two ends of each group of first shrinkage joints correspondingly extend into the space between two second shrinkage joints adjacent in the longitudinal direction respectively, and a twisting deformation section is formed in an overlapping area between the first shrinkage joints and the second shrinkage joints, so that the bendable part can be bent, twisted and deformed.

In one embodiment, the first limiting block and the second limiting block are formed by dividing a side wall, located on the side of the first shrinkage joint, of the bendable portion through the second shrinkage joint, one ends, close to the first shrinkage joint, of the first limiting block and one end, close to the first shrinkage joint, of the second limiting block are connected into a whole, and the other ends of the first limiting block and the second limiting block are separated from each other.

Advantageous effects

An insertable tissue closure device according to the above embodiments includes an integrally formed clip member. The clamp includes a clamp and a separation base. In the clamping member, the clamping arm comprises a clamping head and a bendable part, and the bendable part is provided with a deformation structure capable of bending towards the closing direction of the clamping member and/or bending towards the opening direction of the clamping member. In the structure, a sleeve in the existing structure is omitted, the moving rod directly drives the clamping piece, and the bending part is combined with the deformation state, so that the clamping piece is opened and closed. The length of the integrated clamp is shorter than the combination of the clamp arm and the sleeve in the prior art under the same scutching requirement. After the clamping piece manufactured by the integrated forming is adopted, the whole tissue clamping and closing device has fewer parts, simpler structure, lower assembly requirement and greatly reduced cost.

Drawings

FIG. 1 is a schematic structural view of an insertable tissue occluding device in an embodiment of the present application, wherein the driving assembly is omitted;

FIG. 2 is a schematic view of a clamping member in a clamping position according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of an embodiment of the present disclosure with the clamping members in an open position;

FIG. 4 is a schematic view of an embodiment of the present application showing the insertion tissue fastening device in an open position (with the movable rod moving in a first stroke);

FIG. 5 is a partially broken away schematic view of the clamp shown in FIG. 4;

FIG. 6 is a schematic view of an embodiment of the present application showing the configuration of an insertable tissue closure device in a clamped state (movement of the movable shaft during a second stroke);

FIG. 7 is a schematic view of the structure of FIG. 6 with a portion of the structure partially broken away;

FIG. 8 is a schematic view of the insertion tissue fastening device in a fastened position with the fastening arms locked in the locked configuration (movement of the motion bar in the third stroke) according to one embodiment of the present application;

FIG. 9 is a schematic view of the structure of FIG. 8 with a portion of the structure partially broken away;

FIG. 10 is a schematic view of an embodiment of the present application showing the configuration of the insertion tissue fastening device in a fastening state with the movable bar separated from the fastening elements (the movable bar moving in a third stroke);

FIG. 11 is a view showing a part of the structure of FIG. 10 partially broken away;

FIG. 12 is a schematic view of the insertion tissue fastening device in a fastened state with the fastener and detachment base detached (with the motion bar moving in a third stroke) according to an embodiment of the present application;

fig. 13 is a schematic view of a part of the structure shown in fig. 12 with a part broken away;

FIG. 14 is a schematic view of an expanded shape of a clip according to an embodiment of the present application;

FIG. 15 is an enlarged view of a modified structure of the bendable portion of the embodiment shown in FIG. 14;

FIG. 16 is an enlarged view of a deformable structure of a bendable portion according to another embodiment of the present application;

FIG. 17 is an enlarged view of a deformable structure of a bendable portion of another embodiment of the present application;

FIG. 18 is a schematic view of a bendable portion of a clamping member according to one embodiment of the present application configured to clamp relatively thin tissue;

FIG. 19 is a schematic view of a deformable structure of a bendable portion of a clamping member according to an embodiment of the present application;

FIG. 20 is a schematic view of a deformed configuration of a bendable portion in another embodiment of the present application;

FIG. 21 is a schematic view of a gripping head in an expanded self-locking position according to an embodiment of the present application.

Modes for carrying out the invention

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The present embodiments provide an insertable tissue clamping device (hereinafter referred to as a clamping device for convenience of description) for clamping tissue (collectively referred to as a target) within a human or animal body to effect hemostasis or closure, which may include, but is not limited to, hemostatic clamps, tissue clamps, and the like.

Referring to fig. 1-13, the clipping device includes a clipping member 100, a motion bar 200, a transmission assembly 300, a control handle 400 and a separating base 500.

Unlike the prior art in which a clamping arm and a sleeve are combined to form a clamping structure, in the present embodiment, the clamping member 100 is an integrally formed structure. The integral structure means that the whole clamping member 100 is integrally formed by processing the same material, and is not assembled by more than two parts. The one-piece molded structure may be made using, but is not limited to, injection molding, laser cutting, and other machining processes. In particular, when laser cutting is adopted, processing of a very small gap can be realized, and miniaturization of the whole structure and improvement of the structural compactness are facilitated.

Referring to fig. 2 and 3, the clamping member 110 includes at least two clamping arms 111. The holding arms 111 are connected integrally. Each set of clamp arms 111 includes a clamp head 1111 and a bendable portion 1112. The holding arms 111 are arranged in a jaw structure to hold an object. The jaw type structure is a structure capable of firmly grasping an object, for example, in fig. 1 to 13, when the grasping arms 111 are two sets, the two grasping arms 111 are disposed to face each other, and when they are closed as shown in fig. 2 (in a grasping state at this time), the object is grasped, as shown in fig. 18 and 19. In other embodiments, when the number of the holding arms 111 is different, it may have different claw structures, for example, when the number of the holding arms 111 is three, the three holding arms 111 may be arranged in a triangle to grip the object.

Referring to fig. 2 and 3, in an embodiment, the bendable portion 1112 is a semi-cylindrical structure, and when the clamping member 110 is closed, the bendable portion 1112 can enclose the cylindrical structure. The semi-cylindrical shape is a non-complete cylindrical shape, is not necessarily a half of the cylindrical structure, and may be a third of the entire cylindrical structure or other sizes. In addition, in other embodiments, the bendable portion 1112 can have other structures, such as a sheet shape, and is not limited to the semi-cylindrical structure.

Unlike the prior art in which the opening and closing of the clamp arm is achieved by the sleeve limiting the clamp arm, in this embodiment, the opening and closing of the clamp arm 111 mainly depends on the deformation of the bendable portion 1112. The bendable portion 1112 has a deformable structure that can be bent in a closing direction of the clip 110 and/or in an opening direction of the clip 110. Referring to fig. 1 and 2, in the embodiment, the initial state of the clamping member 110 is the clamping state, i.e. the clamping member 110 is in the clamping state without deforming the bending portion 1112. At this time, the bendable part 1112 has at least a deformation structure capable of bending in the expanding direction of the clip 110, and thereby the clip 110 is expanded as shown in fig. 3. Of course, in other embodiments, the initial state of the clamping member 110 may be an open state, for example, the clamping member 110 is in the open state shown in fig. 3 without the flexible portion 1112 deforming. At this time, the bendable portion 1112 has at least a deformable structure that can be bent in the closing direction of the clip 110, and can be moved to the state shown in fig. 2, thereby closing the clip 110. In other embodiments, the bendable portion 1112 may have a deformable structure capable of bending toward the closing direction of the clamping member 110 and bending toward the opening direction of the clamping member 110, so that the clamping member 110 can be more flexibly changed during the opening and closing processes.

Wherein, the anti-bending deformation ability of the clamping head 1111 is higher than that of the bending part 1112, so as to ensure that the clamping arm 111 provides better biting effect to the object. The bending deformation of the bendable portion 1112 can be achieved by an integral structure thereof, for example, by providing a shrink seam capable of shrink deformation on the bendable portion 1112, by changing the thickness of the material of the bendable portion 1112, or by another integral structure, which will be described in more detail later. The bending deformation of the bendable part 1112 is reversible, that is, the bendable part 1112 has elasticity and can be restored by springing back when the external force is lost, so that the bending deformation can be repeated.

The motion bar 200 is used to control the open and clamping state of the clamping member 100. In fig. 1-13, the motion bar 200 is a tension bar. In other embodiments, the motion bar 200 may have other configurations. The moving rod 200 is connected to the clamping member 110, and the movement of the moving rod 200 can control the clamping member 110 to move in the opening direction and the clamping direction. The driving assembly 300 serves to support the clamping member 100 and to transmit motion and force to the motion bar 200.

Referring to fig. 1, 4 and 5, the driving assembly 300 includes a sleeve assembly 310 and a driving member 320 inserted into the sleeve assembly 310, wherein the driving member 320 is connected to the moving rod 200. The clip 100 and the separating base 500 are detachably connected to each other, so that the clip can be detached from the separating base 500 when necessary.

The detachment base 500 is pivotally coupled to the cannula assembly 310, for example, as shown in FIGS. 4 and 5, the detachment base 500 fits within the cannula assembly 310. The connection between the split base 500 and the grip 100 allows both to rotate in the circumferential direction of the sleeve assembly 310 so that the grip 100 can rotate integrally with respect to the sleeve assembly 310. The sleeve assembly 310 is connected to the control handle 400, and the control handle 400 and the transmission member 320 form a linkage structure to control the actions of the transmission member 320, the motion rod 200 and the clamping member 100. For example, an operator may control the rotation of the clamp assembly 100 relative to the cannula assembly 310 by controlling the handle 400, and may also control the opening and closing of the clamp assembly 100 by controlling the handle 400.

The movement of the moving bar 200 may be a movement along its axial direction, a rotational movement, or the like. For example, referring to fig. 4 and 5, in one embodiment, when the moving rod 200 moves away from the control handle 400 along the axial direction thereof and approaches the clamping member 100 (shown moving to the right), the moving rod 200 can drive the clamping member 100 to expand outward, so as to move the clamping member 100 to the expanded state. Referring to fig. 6 and 7, in one embodiment, when the moving rod 200 moves away from the clamping member 100 (shown moving leftward) along the axial direction thereof approaching the control handle 400, the moving rod 200 can drive the clamping members 100 to move inward and close to each other, so as to move the clamping member 100 to the clamping state. Of course, in other embodiments, the kinematic relationship of motion bar 200 to clamp member 100 may be different from that shown in fig. 4-7, such as driving clamp member 100 open when motion bar 200 is moved toward control handle 400 and driving clamp member 100 closed when moved toward clamp member 100.

Wherein the moving bar 200 has a first stroke, a second stroke, and a third stroke regardless of the movement of the moving bar 200. 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 clamp 100 maintains the clamped state and is separated from the moving bar 200, and the separation base 500 is separated from the clamp 100. The separation of the clamp 100 from the motion bar may employ, but is not limited to: this is accomplished by disengaging the connection structure between the clamping member 100 and the moving bar or disconnecting the clamping member 100 and a portion of the moving bar together with another portion of the moving bar. In the third stroke, the clamp 100 is separated from the moving rod 200, and the separation of the separation base 500 from the clamp 100 may be simultaneously performed, or may be performed before the other one.

The first stroke, the second stroke, and the third stroke are three parts of the whole movement stroke of the movement rod 200, and the three strokes may be in the same direction, or in different directions between at least two strokes, or all three strokes are in different directions. The strokes may be completely separated from each other, completely unrelated, or may be continuous or overlapping between at least two strokes, e.g., the third stroke may be closely connected after the second stroke, and immediately enter the third stroke after the second stroke is finished. Of course, the second stroke and the third stroke may also be two separate, non-continuous portions.

As an example, referring to fig. 4 and 5, when the moving rod 200 is in a first stroke, the moving rod 200 is away from the control handle 400 along the axial direction thereof, and when the moving rod 200 moves close to the clamping member 100 (shown in the right direction), the moving rod 200 can drive the clamping member 100 to expand outward, so as to move the clamping member 100 to the expanded state.

Referring to fig. 6 and 7, in the second stroke of the moving rod 200, the moving rod 200 is close to the control handle 400 along the axial direction thereof, and when moving away from the clamping member 100 (shown in the figure to the left), the moving rod 200 can drive the clamping members 100 to move inward and close to each other, so that the clamping member 100 moves to the clamping state.

Referring to fig. 8-13, when the moving rod 200 is in the third stroke, the moving rod 200 is close to the control handle 400 along the axial direction thereof, and moves away from the clamping member 100 (shown in the figure to the left), the third stroke is in the same direction as the second stroke and is tightly connected, that is, when the clamping member 100 moves to the clamping state, the moving rod 200 is switched from the second stroke to the third stroke. Wherein, the third stroke can be divided into a plurality of sub-strokes, and the sub-strokes comprise a locking stroke, an inner disengaging stroke and an outer disengaging stroke.

Referring to fig. 8 and 9, when the moving rod 200 is switched to the third stroke until the moving rod moves to the position shown in the figure, the clamping member 100 is locked, and the moving rod 200 cannot move reversely to open the clamping member 100 again. The movement stroke of the moving bar 200 in this process is a locking stroke.

Referring to fig. 10 and 11, the moving rod 200 enters the inner disengaging stroke after completing the locking stroke. When the moving rod 200 moves to the position shown in the figure, the clamping member 100 is separated from the moving rod 200, the moving rod 200 can not drive the clamping member 100 to move any more, the control on the clamping member 100 is lost, and the clamping member 100 is kept in the locking state. The moving stroke of the moving bar 200 in this process is an inner disengaging stroke.

Referring to fig. 12 and 13, the moving bar 200 enters the outer disengaging stroke after completing the inner disengaging stroke. When the moving bar 200 moves to the illustrated position, the clamping member 100 and the separating base 500 are separated at this time, and by this, the clamping member 100 is left on the object clamped thereby. The separation base 500, the moving bar 200, and the driving assembly 300 may be withdrawn from the test object. The moving stroke of the moving bar 200 in this process is an outer disengaging stroke.

Of course, while fig. 8-13 illustrate only one embodiment of the third stroke, in other embodiments, the locking stroke, the inner disengagement stroke, and the outer disengagement stroke may also be performed in overlapping fashion, e.g., the inner and outer disengagement strokes overlap, and the inner and outer disengagement strokes are performed simultaneously.

In the structure shown in each of the above embodiments, the sleeve in the conventional structure is omitted, and the movement rod 200 directly drives the clamping member 100, in combination with the deformed state of the bendable portion 1112, thereby achieving the opening and closing of the clamping member 100. Because of the less restrictive effect of the sleeve on the clamp arm, the clamp arm 110 deforms from the bendable portion 1112 with the deformation area closer to the bottom of the overall clamp 100, and therefore, the length of the integrated clamp 100 is shorter than the clamp arm and sleeve combination of the prior art for the same open width requirement. While at the same length, the one-piece clip 100 can be opened to a greater degree than the prior art clip arm and sleeve combination, and more easily engage the tissue of the subject. When the clamping member 100 is separated from the separating base 500, the shorter clamping member 100 stays in the target object, so that discomfort caused by the overlong clamping head of the hemostatic clamp (or the tissue clamp) can be reduced, and the problem of excessive abrasion of the target object caused by the overlong clamping head of the hemostatic clamp (or the tissue clamp) can be avoided as much as possible. In addition, the integral structure avoids the fitting clearance of parts necessary for the fitting of the shaft hole or the sliding displacement, so that the bending repetition accuracy of the clamp arm 110 is higher.

Moreover, the whole process of the clamping member 100 is simple. Compared with the combined structure of multiple parts in the existing hemostatic clamp (or tissue clamp), after the clamping piece 100 manufactured by integral forming is adopted, the whole clamping device has fewer parts, simpler structure, lower assembly requirement, greatly reduced cost and higher control precision. Likewise, the overall length of the clip 100 is also shorter than the length of existing hemostatic clips (or tissue clips). Such a shorter length of clip 100 is easier to pass through in an endoscopic instrument channel due to the very limited inner diameter of the endoscopic instrument channel.

Further, as described above, the bending deformation of the bendable portion 1112 is achieved by its integral structure. Referring to fig. 2, 3, 5, and 14-17, in some embodiments, an end of the clamping member 100 near the separating base 500 is a proximal end, an end away from the separating base 500 is a distal end, and a direction from the proximal end of the clamping member 100 to the distal end thereof is a longitudinal direction of the clamping member 100. In order to realize the integrated deformation structure, the deformation structure comprises a plurality of first shrinkage joints 1113, and the first shrinkage joints 1113 are sequentially arranged along the longitudinal direction.

In one embodiment, as shown in FIG. 2, the clamping member 100 is held in the clamping state in the initial state, the first contraction joint 1113 is maintained in the initial state, and the portions of the bendable portion 1112 are not deformed. When it is desired to expand clamp 100, as shown in fig. 3, bendable portion 1112 is deformed outwardly and first contraction joint 1113 is contracted, thereby contracting the outer sides of bendable portion 1112 (the sides of clamp arms 110 facing away from each other) and expanding the entire clamp head 1111.

Referring to fig. 2, 3, and 14-17, in one embodiment, the first contraction joint 1113 extends around the circumference of the bendable portion 1112. The first shrinkage seams 1113 are arranged in parallel. Of course, the first shrinkage joints 1113 may be arranged in other non-parallel arrangements besides being parallel to each other. The first shrinkage joints 1113 are uniformly arranged in parallel along the circumferential direction of the bendable part 1112, so that the bending deformation direction of each first shrinkage joint 1113 can be uniform, and the bending deformation of the clamping member 100 is smoother and more stable.

To achieve a smoother change in curvature, in one embodiment, the first seams 1113 are divided into groups, each group of first seams 1113a having at least one first seam 1113. As shown in fig. 2, 3 and 14-15, each set of first shrink seams 1113a has two first shrink seams 1113 in this embodiment. As shown in fig. 16 and 17, in this embodiment, each set of first shrink seams 1113a has one first shrink seam 1113. The contraction of each first contraction joint 1113 can make the bendable part 1112 have a certain bending angle, and the combination of the plurality of first contraction joints 1113 can make the bendable part 1112 have a larger opening and closing angle. The length of all first shrinkage joints 1113 in the longitudinal direction determines the bending deformation area of the whole bendable portion 1112, and the number of first shrinkage joints 1113a, the longitudinal gap between adjacent first shrinkage joints 1113a, the number of first shrinkage joints 1113 in the first shrinkage joint 1113a, and the like can be flexibly set according to actual requirements. For example, first shrink seam group 1113a may be 4-6 groups.

Referring to FIG. 17, in one embodiment, the first contraction joint 1113 has an elongated slot shape, and the middle of the first contraction joint 1113 has two opposite convex arc-shaped edges 1113a. When the clamping member 100 is opened to the limited position, the arc-shaped edges 1113a contact each other, thereby determining the maximum opening angle. When clamp 100 is in the clamping position, arcuate edges 1113a contact each other, thereby providing support to clamp 100.

In view of the need for minimally invasive surgery, the clipping device is usually very fine and small, so that it is not preferable to use a thicker material for the clipping member 100 on the premise of satisfying the small volume of the clipping device. However, the thinner thickness requirement may result in weakening the strength of the bendable portion 1112, and in particular, when the external force applied by the operator is too large, which causes the clamping arm 110 to bend outward at too large an angle, as shown in fig. 3, the clamping arm 110 may be broken from the bendable portion 1112. In this regard, 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 can bend in the opening direction. That is, the bendable portion 1112 can be freely bent within the maximum angle. When the bending angle reaches the maximum angle, the limiting structure 1114 starts to act to limit the bending portion 1112 to be bent outwards continuously, and the bendable portion 1112 and the clamping member 100 are protected. The stop 1114 primarily achieves a maximum angle limit by stopping at the upper longitudinal end of the clamp 100.

Referring to fig. 3 and 14-17, in one embodiment, each of the limiting structures 1114 includes a plurality of limiting units 1114a arranged along the longitudinal direction of the clamping member 100. The stopper unit 1114a includes a first stopper 1115 and a second stopper 1116 that are disposed opposite to each other. As shown in the enlarged partial views of a and b in fig. 15, a gap 1117 is formed between the first stopper 1115 and the second stopper 1116, and the first stopper 1115 and the second stopper 1116 approach each other to form a snap-fit structure during the bending of the bendable portion 1112 in the opening direction (see the enlarged partial view of b in fig. 15). That is, in the initial state, a gap 1117 is left between the first stopper 1115 and the second stopper 1116 as shown in a in fig. 15, when the clamping member 100 is gradually opened outward, the first stopper 1115 and the second stopper 1116 move relatively in the longitudinal direction, the gap 1117 gradually decreases, and finally when the bendable portion 1112 reaches the maximum angle, as shown in b in fig. 15, the first stopper 1115 and the second stopper 1116 abut against each other to form a stopper.

Referring to fig. 14-17, in one embodiment, the first stopper 1115 and the second stopper 1116 are two hook-type stoppers that engage with each other. The limit hook structure can be replaced by other structures with similar functions. Referring to fig. 3, in an embodiment, the first shrinkage joint 1113 is located in the middle of the circumference of the bendable portion 1112, the number of the limiting structures 1114 is at least two, and the limiting structures 1114 are respectively arranged on two sides of the bendable portion 1112 in the circumference of the bendable portion 1112, so as to further ensure that the whole bendable portion 1112 can be synchronously bent and limited.

Referring to fig. 3 and fig. 14-17, in an embodiment, in the same limiting unit 1114a, the first limiting block 1115 and the second limiting block 1116 are formed by dividing a sidewall of the bendable portion 1112, the sidewall of the bendable portion 1112 is located at a side of the first shrinkage joint 1113, one end of the first limiting block 1115 and one end of the second limiting block 1116 close to the first shrinkage joint 1113 are connected into a whole, and the other ends are separated from each other. The first stop 1115 and the second stop 1116 also open with the clamping member 100 as the clamping member 100 opens outwardly.

As shown in fig. 3 and 14-15, each set of first shrinkage joints 1113a can be circumferentially aligned with one of the limiting units 1114a, so as to ensure that the limiting function of the limiting unit 1114a can accurately act on the corresponding first shrinkage joints 1113, so as to prevent the first shrinkage joints 1113 from continuing to shrink and deform to cause the fracture of the bendable portion 1112 after bending to the maximum angle.

The number of stop units 1114a may be greater than the number of first shrink seam groups 1113a, so as to completely cover all first shrink seams 1113 in the longitudinal direction for better stop. Of course, the number of spacing units 1114a may be less than or equal to the number of first shrinkage groups 1113a.

Further, referring to fig. 14-17, in one embodiment, a second shrinkage joint 1118 is disposed between the first stopper 1115 and the second stopper 1116, and at least a portion of the second shrinkage joint is disposed along the circumference of the bendable portion 1112. The second shrink seam 1118 can space the first stopper 1115 from the second stopper 1116 so that the stoppers can move relative to each other. The second shrink seam 1118 is in communication with a gap 1117 between the first stop block 1115 and the second stop block 1116.

Considering that the bending motion of the clamping member 100 towards the opening direction and the bending motion towards the clamping direction are often accompanied by the twisting motion around the circumference thereof, referring to fig. 14-17, in one embodiment, two ends of each set of first contraction joints 1113a respectively extend into the space between the second contraction joints 1118 of two longitudinally adjacent limiting units 1114a, and the overlapping area between the first contraction joints 1113 and the second contraction joints 1118 forms the twisting deformation segment 1119, so that the bendable portion can be bent and twisted to deform. When the twisted segment 1119 is provided, the bending deformation of the clamping member 100 is smoother, and the bending portion 1112 is prevented from being broken by the torsion. By adjusting the circumferential length and the longitudinal height of the distorted section 1119, the maximum opening angle, the bending flexibility or the supporting ability of the bendable part 1112 can be further changed, which can be flexibly set according to actual requirements.

In the embodiment shown in fig. 15 and 17, the second shrink seams 1118 are arranged in a straight line. In the embodiment shown in FIG. 16, the second shrink seams 1118 are U-shaped.

Further, as described above, after the object 1 is clamped by the clamp 100, the moving bar 200 is moved to a predetermined locking structure together with the clamp 100 to be locked. However, in actual use, when the clamping members 100 clamp human tissue with different hardness or thickness (as shown in fig. 17 and 18), the closing angle of the clamping members 100 is limited. Since the closing angle is associated with the stroke of the moving bar 200, at this time, the clamp 100 and the moving bar 200 are not moved to the position of the locking structure, and the clamp 100 cannot be maintained in the clamped state.

To address this issue, and referring to fig. 18 and 19, the second shrink seam 1118 has a gap in the longitudinal direction. The second shrinkage joint 1118 of the limiting structure 1114 forms an adaptive floating structure capable of deforming towards the clamping direction, so that when the clamping member 100 clamps the target 1, the bendable part 1112 can deform towards the closing direction in an adaptive bending manner according to the volume of the target 1, an adaptive stroke range is provided for the motion rod 200 and the clamping member 100, the rigid body deformation margin of the motion rod 200 is increased, the motion rod 200 and the clamping member 100 can move to the locking position of the locking structure all the time, and accurate and reliable locking is achieved.

Specifically, referring to fig. 18, when the clamping member 100 clamps the object 1 with a relatively thin thickness, the clamping member 100 can be normally closed, the second contraction joint 1118 keeps a normal clearance (as shown in a partially enlarged view of a in fig. 18), the moving rod 200 and the clamping member 100 can be accurately moved to the position of the locking structure as shown by the above locking stroke, and the clamping member 100 is locked in the clamping state. Referring to fig. 19, when the clamping members 100 clamp the object 1 with a relatively thick thickness, the clamping members 100 cannot be closed to the extent shown in fig. 18, and at this time, the second contraction joint 1118 can be deformed toward the closing direction of the clamping members 100 by pulling the motion bar 200 (as shown in the enlarged partial view of a in fig. 19). For example, in one embodiment, each second contraction joint 1118 is capable of providing a compression of 0.02 MM to 0.05MM in the longitudinal direction, and for the number of second contraction joints 1118 shown, the plurality of second contraction joints 1118 collectively provide a deflection of approximately 0.1 MM to 0.2MM, thereby causing the flexible portions 1112 to flex inwardly as shown in FIG. 19 (the flexible portions 1112 are deformed to project slightly outwardly on either side of FIG. 19), thereby compensating for lost travel in the clamp 100 and allowing the clamp 100 to eventually lock to the locking configuration.

The above-mentioned embodiment shows a structure in which the bendable portion 1112 is bent and deformed by forming the contraction joint, and the deformation structure of the bendable portion 1112 of the present embodiment is not limited thereto, and may be realized by other means. For example, referring to fig. 20, in one embodiment, the thickness of the bendable portion 1112 may be thinner than other portions of the clamping member 100, such as the clamping head 1111 and the connecting portion 120 (described in detail later), so that the bendable portion 1112 can be preferentially bent and deformed when the motion bar 200 moves the clamping member 100.

Further, to reduce interference between the jaws 100 when closed, in one embodiment, opposing ends of the jaws 100 are provided with relief structures 1110 to relieve each other when the jaws 100 are closed. Referring to fig. 16, in this embodiment, the opposing ends of the clip members 100 are retracted inwardly to form an escape structure 1110, and an escape slot is formed between the opposing clip members 100 by the retracted region. The width of the avoiding groove gradually increases along the longitudinal direction of the clamping member 100, wherein one end of the avoiding groove close to the clamping head 1111 is wider than the other end. Of course, the avoidance structure 1110 may be other structures capable of performing an avoidance function, and is not limited to the illustrated structure.

Further, the movable rod 200 may be connected to the clamping member 100 through various structures, as long as the clamping member 100 can be driven to move in the opening direction and the clamping direction. The motion bar 200 may be directly coupled to the clamping member 100 or coupled to the clamping member 100 through the clamping member coupling structure 600.

Referring to fig. 5 and 21, in one embodiment, the clamping member connecting structure 600 includes two connecting rods 610, one end of each connecting rod 610 is connected to the distal end of the motion bar 200 and can rotate around a shaft 620, and the other end of each connecting rod 610 is connected to and can rotate around a transverse shaft of the clamping head 1111. The connecting rod 610 is similar to a Y shape, and aims to effectively transmit the pushing force and the pulling force of the up-and-down movement of the moving rod 200 to the clamping head 1111, so as to control the opening and closing of the clamping head 1111.

Referring to fig. 21, when the moving rod 200 moves in the first stroke, the clamping member 100 can be opened in the opening direction as the moving rod 200 moves away from the end of the control handle 400. The rotation center a of the link 610 and the motion bar 200 can cross the connection line B between the link 610 and the clamping head 1111, so as to form a self-locking function, so that the clamping member 100 is kept in an open state, cannot be easily closed by an external force, and can only be retracted by the control handle 400 controlling the clamping head 1111.

Of course, the clamp connection structure 600 may also be connected by other structures, such as various clamp arm and pull rod connections disclosed in the prior art.

Further, referring to fig. 2, 3 and 5, in one embodiment, the clamping member 100 includes a connecting portion 120. The connecting portion 120, the bendable portion 1112 and the clamping head 1111 are connected in sequence. The separation base 500 is detachably coupled to the connection part 120.

Referring to fig. 2-13, the connecting portion 120 has the above-mentioned locking structure 121, and the locking structure 121 is used for locking 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 disposed directly on the bendable portion 1112 or other structures.

As described above, the locking structure 121 is used to lock the clip 100 in the clipped state. The locking structure 121 at least prevents the clamping member 100 from moving in the opening direction, so as to ensure that the clamping member 100 is always in the clamping state. Of course, the locking structure 121 can also prevent the movement of the clip 100 toward the control handle 400 at the same time, which facilitates the disengagement of the clip 100 from the moving bar 200. To achieve this locking effect, the locking structure 121 may be lockingly engaged with the motion bar 200, the clip connecting structure 600, and the clip 100 itself.

In one embodiment, the motion bar 200 or the clamp connection structure 600 has a lock engagement portion 631, and the lock structure 121 is located on a moving path of the lock engagement portion 631 when the motion bar 200 moves along the third stroke; when the latch engagement portion 631 moves to the latch structure 121, the two form a latch engagement, holding the clamp 100 in the clamped state.

Referring to fig. 4-13, in one embodiment, the clamping member 100 is formed as a cylindrical structure. One end of the moving rod 200 is inserted into the cylindrical structure and is connected with the holder 100. The locking engagement portion 631 includes an elastic body provided to protrude toward the holder 100, and the locking structure 121 includes a catching groove capable of engaging with the elastic body. The elastic body is located in the clamping piece 100 and is in an extrusion deformation state, and the elastic body can be clamped with the clamping groove under the action of elastic force.

Referring to fig. 8-13, the third stroke of the motion bar 200 moves from the clip 100 to the separating base 500, and the elastic body is a spring integrally formed on the motion bar 200 and inclines to one side of the distal end of the clip 100 along the protruding direction. As shown in fig. 8 to 13, the inclined resilient plate can move along the inner wall of the clamping member 100 to the side of the control handle 400 when the moving rod 200 moves along the third stroke, so as to prevent the resilient plate from being clamped to other parts of the clamping member 100. As shown in fig. 9 and 13, when the elastic piece moves to the slot position, the elastic piece can be clamped into the slot under the elastic force to prevent the moving rod 200 and the clamping member 100 from retracting to open the clamping state.

Specifically, referring to fig. 13, in one embodiment, the locking engagement portion 631 is disposed on a cylindrical body 630, and the cylindrical body 630 is a part of the clamp connection structure 600, which can form a linkage structure with the connecting rod 610 through the shaft 620. The moving bar 200 passes through the cylinder 630 and is coupled to the shaft 620. The cylinder 630 can move toward the control handle 400 side following the moving bar 200 until it is locked by the locking structure. When the locking engagement portion 631 is locked in the locking configuration, the linkage 610 and its attached clamp 100 cannot move in the opening direction.

Of course, the illustrated spring is only an example of the locking engagement portion 631, and in other embodiments, other structures that may perform the locking function may be adopted, such as the clamping arms or the locking manner of the pull rod and the sleeve disclosed in the prior art.

In order to lock the clamping member 100 more stably, please refer to fig. 13, in one embodiment, the number of the locking structures 121 and the locking engagement portions 631 is two or more (two in the figure). For uniform force, in one embodiment, the locking structures 121 are evenly distributed around the circumference of the clamp 100 (i.e., adjacent locking structures 121 are spaced at the same angle), and the locking engagement portion 631 is located opposite the clamp 100, such as evenly distributed around the circumference of the motion bar 200.

Further, referring to fig. 5, 11 and 13, in an embodiment, in order to install the separating base 500, the connecting portion 120 is provided with a clamping portion 122, and the separating base 500 is provided with a leg 510. The legs 510 are snap-fit to the snap-fit portion 122. The moving bar 200 has a push-top portion 283, and when the moving bar 200 moves along the third stroke, the separation base 500 is disposed on a moving path of the push-top portion 283, and the push-top portion 283 can push the separation base 500 to move toward the control handle 400 to separate the connection portion 120 and the separation base 500. Referring to fig. 11 and 13, for example, the separating base 500 has a protrusion 530 located on the moving path of the pushing top 283, and the protrusion 530 may be a bottom of the separating base 500 having a through hole for the motion bar 200 to pass through. In order to engage with the connecting portion 120, the separating base 500 may have a bent buckle on the leg 510, and the engaging portion 122 may be a slot engaged with the buckle, and the buckle extends into the slot for engaging connection. This connection is such that, under the urging of the ejector 283, the catch deforms and disengages from the catch 122.

Further, referring to fig. 5-13, in one embodiment, the motion bar 200 is configured to be detachable from the base structure by a split-type combination. Specifically, the motion bar 200 has a snap groove 281, the snap groove 281 has an opening 282 smaller than the groove cavity thereof, and the motion bar 200 is snapped with the clamping member connecting structure 600 through the snap groove 281, and can be specifically 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 function of the opening 282, the clamping member connecting structure 600 and the clamping member 100 can move together with the moving rod 200 to achieve the opening and clamping of the clamping member 100. As shown in fig. 25, after the moving rod 200 is located at the inner disengagement stroke, the clip 100 and the clip connecting structure 600 are blocked from further moving to the control handle 400, and at this time, the clip connecting structure 600 is disengaged from the opening 282 of the snap-in groove 281 by an external force, and the moving rod 200 is disengaged from the clip connecting structure 600, thereby achieving the inner disengagement.

The above is merely an example of an internal disengaging structure, and in other embodiments, the motion bar 200 may also be an integrally formed structure. For example, in one embodiment, the motion bar 200 has a retention section and a separation section that are integrally connected by a second tear. The retaining section is connected with the clamping body, and the locking matching part is positioned on the retaining section. When the moving bar 200 moves along the third stroke, the second tear is broken and the remaining segment and the separated segment are separated. In addition, the motion bar 200 and the clamp 100 can be separated by other inner separation structures, such as the inner separation structure of the pull bar and the clamp arm in the prior art.

Further, referring to fig. 1 and 5, in connection with the transmission assembly 300, the sleeve assembly 310 may generally include a spring support sleeve 311, and a transmission member 320 (e.g., a traction control wire) may be disposed in the spring support sleeve 311. The motion rod 200 may be fixedly connected to the transmission member 320 through a variable diameter adapter 321 or other structure. The spring support sleeve 311 is sleeved and fixed with a connecting pipe 312, and the connecting pipe 312 is provided with a fixed seat 313. The connection pipe 312 is rotatably connected to the separation base 500 and the clamping member 100 so that the entire clamping member 100 can rotate with the separation base 500 with respect to the transferring assembly 300.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims

An insertable tissue clamping device comprising:

the clamping piece is of an integrally formed structure and comprises at least two clamping arms, each group of clamping arms comprises a clamping head and a bendable part, and the clamping arms are arranged in a clamping jaw type structure to clamp a target object; the bendable part has a deformation structure capable of bending toward a closing direction of the clamp and/or bending toward an opening direction of the clamp;

a separation base connected with the clamp;

the moving rod is connected with the clamping piece so as to drive the clamping piece to open and close;

the transmission component comprises a sleeve component and a transmission component penetrating through the sleeve component, the transmission component is connected with the moving rod, and the separation base is rotatably connected to the sleeve component so that the clamping component can integrally rotate relative to the sleeve component;

the sleeve assembly is connected with the control handle, and the control handle and the transmission piece form a linkage structure so as to control the motion of the motion rod and the clamping piece;

the motion bar has a first stroke, a second stroke, and a third stroke; in the first stroke, the moving rod drives the clamping heads to move away from each other so as to open the clamping heads; in the second stroke, the moving rod drives the clamping heads to approach each other, and the clamping piece moves to a clamping state to clamp the target object; in the third stroke, the clamping piece maintains the clamping state and is separated from the moving rod, and the separation base is separated from the clamping piece.
The insertable tissue closure device of claim 1, wherein the deformation structure comprises a plurality of first shrink seams arranged in series longitudinally along the holder.
The insertable tissue closure device of claim 2, wherein the first pinch seams are divided into groups, each group having at least one first pinch seam; the bendable part is provided with a plurality of second shrinkage joints which extend along the circumferential direction of the bendable part, and the second shrinkage joints are arranged along the longitudinal direction; and two ends of each group of first shrinkage joints correspondingly extend into the space between two second shrinkage joints adjacent in the longitudinal direction respectively, and a twisting deformation section is formed in an overlapping area between the first shrinkage joints and the second shrinkage joints, so that the bendable part can be bent, twisted and deformed.
The insertable tissue closure device of claim 3, wherein the first shrink seam extends around a circumference of the bendable portion; the bendable portion is provided with a limiting structure, and the limiting structure is used for limiting the maximum bending angle of the bendable portion towards the opening direction.
The insertable tissue closure device of claim 4, wherein each of the retention structures comprises a plurality of retention units arranged along a longitudinal direction of the holder, the retention units comprise a first retention block and a second retention block arranged opposite to each other, a gap is formed between the first retention block and the second retention block, the gap is formed between the first retention block and the second retention block, and the second contraction joint is communicated with the gap; and in the bending process of the bendable part towards the opening direction, the first limiting block and the second limiting block are close to each other and form a buckling structure.
The insertable tissue closure device of claim 5, wherein the first and second stoppers are formed by dividing the sidewall of the flexible portion on the side of the first contraction joint by the second contraction joint in the same stopper unit, and the first and second stoppers are integrally connected at one ends thereof adjacent to the first contraction joint and separated from each other at the other ends thereof.
The insertable tissue closure device of claim 6, wherein the initial state of the gripping member is a gripping state; the second shrinkage joint has a gap in the longitudinal direction, and the second shrinkage joint constitutes an adaptive floating structure capable of deforming in the clamping direction, so that the bendable portion can adaptively bend and deform in the closing direction according to the volume of the object when the object is clamped by the clamping member.
The insertable tissue closure device of any of claims 1-7, wherein opposing ends between the gripping members are provided with an escape structure to escape each other when the gripping members are closed.
The insertable tissue closure device of any one of claims 1-8, wherein the clip member comprises a connecting portion, the bendable portion, and the clip head being integrally connected in series; the clamping piece is detachably connected with the separation base through the connecting part; the connecting part is provided with a locking structure, and the locking structure is used for locking the clamping piece in the clamping state.
The insertable tissue closure device of claim 9, wherein the motion bar, the jaws, or a jaw connection structure connecting the motion bar and the jaws is provided with a lock engagement portion, the lock structure being located on a path of movement of the lock engagement portion when the motion bar moves along the third stroke; when the locking matching part moves to the locking structure, the locking matching part and the locking structure form locking matching to keep the clamping piece in a clamping state.
The insertable tissue closure device of claim 10, wherein the holder defines a cylindrical structure, and wherein the motion bar has one end extending into the cylindrical structure and connected to the holder; the locking cooperation portion includes the orientation the protruding elastomer that sets up of holder, the locking structure including can with elastomer complex draw-in groove, the elastomer is located in the holder to be in the extrusion deformation state, the elastomer can under the spring action with the draw-in groove joint.
The insertable tissue closure device of claim 11, wherein the third stroke of the motion bar is in a direction from the retaining member toward the release base, and the resilient body has a spring attached to the retaining member, the spring being inclined in a direction of its projection toward the distal end of the retaining member.
The clamping piece of the plug-in tissue clamping device is characterized in that the clamping piece is of an integrally formed structure and comprises at least two clamping arms, the clamping arms are connected with each other, each group of clamping arms comprises a clamping head and a bendable part, and the clamping arms are arranged in a clamping jaw type structure to clamp a target object; the bendable portion has a deformable structure capable of bending in a closing direction of the clamp arms and/or in an opening direction of the clamp arms.
The clip of claim 13, in which the deformation structure comprises a plurality of first shrink seams arranged in series longitudinally along the clip.
The clip of claim 14, wherein the bendable portion has a plurality of second pinch seams extending circumferentially thereof, the second pinch seams being arranged in the longitudinal direction; and two ends of each group of first shrinkage joints correspondingly extend into the space between two second shrinkage joints adjacent in the longitudinal direction respectively, and a twisting deformation section is formed in an overlapping area between the first shrinkage joints and the second shrinkage joints, so that the bendable part can be bent, twisted and deformed.
The clip of claim 15, wherein the first shrink seam extends around a circumference of the bendable portion; the bendable portion is provided with a limiting structure, and the limiting structure is arranged on at least one side of the bendable portion in the circumferential direction of the bendable portion so as to limit the maximum bending angle of the bendable portion towards the opening direction of the clamping piece.
The clamping member of claim 16, wherein each of the limiting structures comprises a plurality of limiting units arranged along the longitudinal direction of the clamping member, each limiting unit comprises a first limiting block and a second limiting block which are oppositely arranged, a gap is formed between the first limiting block and the second limiting block along the longitudinal direction, and the second contraction joint is communicated with the gap; and in the bending process of the bendable part towards the opening direction, the first limiting block and the second limiting block are close to each other and form a buckling structure.
The clamping member as claimed in claim 17, wherein in the same limiting unit, the first limiting block and the second limiting block are formed by dividing a side wall of the bendable portion, which is located at the side of the first contraction joint, by the second contraction joint, one ends of the first limiting block and the second limiting block, which are close to the first contraction joint, are connected into a whole, and the other ends are separated from each other.
The clip defined in claim 18 wherein the initial state of the clip is a clipped state; the second shrinkage joint has a clearance in the longitudinal direction, and the second shrinkage joint constitutes an adaptive floating structure capable of deforming in the clamping direction, so that the bendable portion can be adaptively bent and deformed in the closing direction according to the volume of the object when the object is clamped by the clamping member.
A member according to any of claims 13 to 19, wherein opposing ends of the member are provided with relief formations to relief from each other when the members are closed.