WO2022257540A1 - Insertable tissue clamping apparatus and gripping piece thereof - Google Patents

Abstract

An insertable tissue clamping apparatus and a gripping piece (100) thereof. The gripping piece (100) comprises at least two gripping arms (110). Each 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 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 by a pin. The clamping arms can be retracted into the sleeves for closure. Clamping arms can also protrude from the sleeve to allow expansion. 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.

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 includes at least two clamping arms, the clamping arms are split structures and connected to each other, each of the clamping arms includes a clamping head and a bendable part; In one of the clamping arms, the clamping head and the bendable part are split structures and are connected to each other, or the clamping head and the bendable part are integrally formed; the clamping arm is used for clamping Hold the target; the bendable portion has a deformable structure capable of bending toward the closing direction of the clamping member and/or bending toward the opening direction of the clamping member;

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.

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 includes at least two clamping arms, each of the clamping arms includes a clamping head and a bendable part, and the clamping head and the bendable part in each of the clamping arms It is a split structure, the two are connected to each other, and the bendable parts of different clamping arms are integrally formed, and the clamping arms are used to clamp the target; the bendable part has a A deformed structure that bends in the closing direction of the holding member and/or bends in the opening direction of the holding member;

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.

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 includes at least two clamping arms, and the clamping arms are split structures, and connected to each other, each clamping arm includes a clamping head and a bendable part, and the clamping head and the bendable part in the same clamping arm are a split structure and are connected to each other, or the The clamping head and the bendable part are integrally formed; the clamping arms are arranged in a jaw-like structure to clamp the target; the bendable part has the ability to bend toward the closing direction of the clamping member And/or a deformed structure that bends toward the opening direction of the clip.

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 includes at least two clamping arms, and each clamping arm includes a clamping head and The bendable part, the clamping head and the bendable part in each clamping arm are separate structures, the two are connected to each other, the bendable parts of different clamping arms are integrally formed, and the clamping The arms are arranged in a jaw-like structure to clamp the target; the bendable part has a deformation structure capable of bending toward the closing direction of the clamping part and/or bending toward the opening direction of the clamping part .

As a further improvement of the above 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.

As a further improvement of the above embodiment, the bendable part has a plurality of second shrinkage seams extending along its circumferential direction, and the second shrinkage seams are arranged along the longitudinal direction; each group of the first shrinkage seams The two ends of the two 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 twisting deformation.

As a further improvement of the above embodiment, the first shrinkage seam extends around the circumference of the bendable part; In the circumferential direction, at least one side of the bendable portion is provided with the limiting structure, so as to limit the maximum bending angle of the bendable portion toward the opening direction of the clamping member.

As a further improvement of the above embodiment, each of the limiting structures includes several limiting units arranged longitudinally along 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; During the bending process, the first limiting block and the second limiting block approach each other and form a buckling structure.

As a further improvement of the above embodiment, in the same limiting unit, the first limiting block and the second limiting block pass through the The second contraction joint is formed by dividing, 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.

As a further improvement of the above 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 composition of the position-limiting structure can The adaptive floating structure deforms in the holding direction, so that when the clamping member clamps the target, the bendable part can adaptively bend and deform in the closing direction according to the volume of the target.

Beneficial effect

According to the insertion type tissue clamping device of the above-mentioned embodiment, the clamping part comprises at least two clamping arms, each clamping arm comprises a clamping head and a bendable part, and the bendable part has the ability to close to the clamping part. A deformed structure that bends in the direction and/or bends toward the opening direction of the clip. 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 clamping member is shorter than the combination of the clamping arm and the sleeve in the prior art. Moreover, in the clamping part, some parts are manufactured separately and assembled as a whole, which can reduce manufacturing difficulty and cost.

Description of drawings

Fig. 1 is a schematic structural view of an insertable tissue clipping device in an embodiment of the present application;

Fig. 2 is a schematic diagram of two split clamping arms forming a clamping piece in an embodiment of the present application;

Fig. 3 is a schematic structural view of the clip shown in Fig. 2 when it is in an open state;

Fig. 4 is a schematic diagram of a clamping part composed of a clamping head and a bendable part in an embodiment of the present application;

Fig. 5 is a schematic diagram of an integrally formed structure of the bendable part, the connecting part and the separation base in an embodiment of the present application;

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

Fig. 8 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. 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 clamping arm is locked in the locking structure (the movement rod moves in the third stroke) in the clamping state;

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 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. 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 structure of the plug-in tissue clamping device in the clamping state in one embodiment of the present application, when the clamping part is separated from the separation base (the movement rod moves in the third stroke);

Fig. 15 is a schematic structural view of part of the structure partially cut away in the state shown in Fig. 14;

Fig. 16 is a schematic diagram of the unfolded shape of the clip in an embodiment of the present application;

Fig. 17 is an enlarged schematic view of the deformation structure of the bendable part in the embodiment shown in Fig. 16;

Fig. 18 is an enlarged schematic view of the deformation structure of the bendable part in another embodiment of the present application;

Fig. 19 is an enlarged schematic view of the deformation structure of the bendable part in another embodiment of the present application;

Fig. 20 is a schematic diagram of the bendable part when clamping thin tissue in an embodiment of the present application;

Fig. 21 is a schematic diagram of the bendable part when clamping thick tissue in an embodiment of the present application;

Fig. 22 is a schematic diagram of the deformation structure of the bendable part in another embodiment of the present application;

Fig. 23 is a schematic diagram of the deformation structure of the bendable part in another embodiment of the present application;

Fig. 24 is a schematic structural view of an embodiment of the present application in an unfolded self-locking state.

Embodiments of the present invention

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

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 the picture 1-13 , the clamping device includes a clamp 100 , sports bar 200 , transmission components 300 , control handle 400 and separate 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 As an integral structure assembled from multiple parts, the clamp 100 Bending deformation is achieved through its own structural deformation without the aid of the sleeve. Please refer to the picture 2-5 , the clamp 110 Includes at least two clamping arms 110 . Among them, as shown in the figure 2 and 3 shown, each clamping arm 110 including clamping head 1111 and bendable part 1112 . The clamp arm 110 There is a split structure, that is, separate parts, which are then connected to each other and assembled into an overall structure. Clamping arm 110 The connection between is usually a fixed connection, but in some embodiments, the clamping arm 110 There may also be a certain activity space between them to meet different functional needs.

Please refer to the picture 2 , in one embodiment, the same clamping arm 110 middle clamping head 1111 and bendable part 1112 Integral molding structure. The integrally formed structure means that the entire part is integrally processed from the same material, rather than assembled by combining two or more parts. One-piece molded structures (including other one-piece molded structures described below) can be made by, but not limited to, injection molding, laser cutting, and other mechanical processing techniques. In particular, when laser cutting is used, the processing of extremely small gaps can be realized, which is beneficial to the miniaturization of the overall structure and the improvement of the compactness of the structure.

Of course, in some embodiments, it is also possible to refer to the clamping arm 110 assembly relationship between the same clamping arm 110 middle clamping head 1111 and bendable part 1112 It is a split structure, and then connected to each other to assemble an integral clamping arm 110 .

Please refer to the picture 4 , in another embodiment, each clamping arm 110 middle clamping head 1111 with bendable part 1112 It is a split structure, that is, two separate parts, and then the two are connected to each other to assemble a whole clamping arm 110 . Among them, as shown in the figure 4 shown, different clamping arms 110 bendable part of 1112 Connected as a whole, the integral molding structure not only facilitates integral molding processing, but also omits the assembly process. Of course, in other embodiments, as shown in 2 shown, different clamping arms 110 flexible part between 1112 It can also be separated from each other and then assembled into one.

The split base 500 It plays the role of supporting the clamping part, and at the same time, it needs to be able to separate from the clamping part at a specific time, so as to achieve the purpose of temporarily keeping the clamping part in the body of the test object. The split base 500 Can be used with clamping parts 100 Connection, the connection can either be an integrated structure or a fixed connection structure. In some embodiments, as shown in 6-15 shown, the separation base 500 Can be used with clamping parts 100 Detachable connection. However, other embodiments, such as 5 shown, the separation base 500 Also available with bendable part 1112 Integral molding structure, Fig. 5 middle, bendable part 1112 through the connection 120 (will be described in detail later) and the separation base 500 connect, connect 120 with separate base 500 through the first tear 540 connect. Of course, the link 120 It can also be omitted, directly by the bendable part 1112 with separate base 500 through the first tear 540 connect.

The clamp 100 In the above-mentioned various embodiments, some parts are disassembled into split structures and manufactured separately, which can reduce the difficulty of manufacturing a single part and reduce the cost. The above components can be connected by means of welding, bonding, mechanical structure connection (including clamping, screwing, riveting, etc.).

Further, the clamp arm 110 The gaps are arranged in a jaw-like structure to hold the target. The claw-type structure is a structure that can firmly grasp the target, for example, in the figure 1-15 , when the clamping arm 110 For two groups, the two clamping arms 110 Relative settings, when its as shown in the figure 2 , 4 and 5 When it is closed as shown (in the clamping state at this time), the target can be grasped, as shown in the figure 20 and twenty one shown.

Please refer to the picture 2-5 , one embodiment, the bendable portion 1112 It is a semi-cylindrical structure, in the clamping part 100 When closed, the flexible part 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. Additionally, in other embodiments, the bendable portion 1112 It can also be in other structures, such as sheet shape, etc., and is not limited to the semi-cylindrical structure.

Compared with the prior art through the sleeve to the clamping arm 110 clamping arm 110 The opening and closing of different, in this embodiment, the clamping arm 110 The opening and closing mainly rely on the flexible part 1112 deformation. Among them, the bendable part 1112 has the ability to clamp 100 The closing direction of the bending and / or to the holder 100 A deformed structure that bends in the unfolding direction. Please refer to the picture 1 and 2 , in the illustrated embodiment, the clamp 100 The initial state is the clamping state, that is, the bending part 1112 Without deformation, the clamp 100 in clamped state. At this time, the bendable part 1112 at least have the ability to hold 100 The deformed structure is bent in the opening direction, so that 3 shown, implement the clip 100 open.

Among them, the clamping head 1111 The resistance to bending deformation is higher than that of the bendable part 1112 , to ensure that the clamping arm 110 Provides a better bite to the target. The bendable part 1112 The bending deformation is achieved through its structure. The bendable part 1112 This bending deformation is reversible, that is, the bending part 1112 It is elastic and can spring back to reset when the external force is lost, so this bending deformation can be repeated.

the exercise bar 200 for control grippers 100 The open and clamped state. in the figure 6-15 , the sport bar 200 for the pull rod. In other embodiments, the exercise rod 200 Other configurations are also possible. sports bar 200 with clamp 100 connection, exercise rod 200 The movement of the gripper can control the 100 Movement in the direction of opening and movement in the direction of clamping. The drive assembly 300 support clamp 100 and to the sports bar 200 The role of transmitting motion and force.

Please refer to the picture 1 , 6 and 7 , the drive assembly 300 Includes bushing assembly 310 and threaded bushing assembly 310 transmission parts inside 320 ,Transmission Parts 320 with exercise bars 200 connect. The clamp 100 and separate base 500 detachable connection between to ensure that when required, the clip 100 Able to separate base with 500 leave.

The split base 500 rotatable connection in bushing assembly 310 on, for example as shown in Fig. 6 and 7 shown, detached base 500 sleeve assembly 310 Inside. separate base 500 with clamp 100 The connection between the bushing assembly allows both 310 The circumference of the rotation, so that the clamp 100 Capable of being integrally opposed to the bushing assembly 310 turn. The bushing assembly 310 with control handle 400 connection, control handle 400 with transmission parts 320 Form a linkage structure to control the transmission parts 320 , sports bar 200 and clamping parts 100 Actions. For example, the operator can control the handle 400 to manipulate the gripper 100 relative bushing assembly 310 Rotate, can also be controlled by the handle 400 to control the gripper 100 opening and closing.

sports bar 200 The movement of the machine can be a movement along its axis, or a rotational movement, etc. For example, please refer to Fig. 6 and 7 , one embodiment, when the motion bar 200 Along its axis away from the control handle 400 , close to the clamp 100 (moving to the right as shown in the illustration) when exercising, the exercise bar 200 Able to drive the gripper 100 flared outwards so that the clip 100 Move to open position. Please refer to the picture 8 and 9 , one embodiment, when the motion bar 200 Close to the control handle along its axis 400 , away from the holder 100 (moving to the left as shown in the illustration) when exercising, the exercise bar 200 Able to drive the gripper 100 inward toward each other so that the clips 100 Move to clamping state. Of course, in other embodiments, the motion bar 200 Kinematic relationship and clamping parts 100 The kinematic relationship can be compared with the graph 6-9 shown differently, for example when the sports bar 200 to the control handle 400 When in motion, the gripper is driven 100 open to the clamp 100 When in motion, the gripper is driven 100 closure.

Among them, sports rod 200 Both have a first trip, a second trip and a third trip. The first stroke, second stroke and third stroke are motion bars 200 For the three parts in the whole motion stroke, the three strokes may be in the same direction, or at least two strokes may be in different directions, or the three strokes may all be in different directions.

As an example, please refer to Fig. 6 and 7 , at this time, the motion bar 200 In the first stroke, the movement lever 200 Along its axis away from the control handle 400 , close to the clamp 100 (shown to the right) when exercising, the exercise bar 200 Able to drive the gripper 100 flared outwards so that the clip 100 Move to open position.

Please refer to the picture 8 and 9 , at this time, the motion bar 200 In the second stroke, the movement lever 200 Close to the control handle along its axis 400 , away from the holder 100 (shown to the left) when exercising, the exercise bar 200 Able to drive the gripper 100 inward toward each other so that the clips 100 Move to clamping state.

Please refer to the picture 10-15 , at this time, the motion bar 200 In the third stroke, the movement lever 200 Close to the control handle along its axis 400 , away from the holder 100 (to the left in the illustration), the third stroke is in the same direction as the second stroke and is closely connected, that is, when the clamp 100 After moving to the clamping state, the movement rod 200 That is, switch 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 the picture 10 and 11 , when the exercise bar 200 Switch to the third stroke until it moves to the position shown in the figure, at this time the clamping piece 100 locked, sport bar 200 Cannot move in reverse to open clamp 100 . exercise bar during this process 200 The movement stroke is the locking stroke.

Please refer to the picture 12 and 13 , exercise rod 200 After completing the locking stroke, enter the inner disengagement stroke. when sports bar 200 When moving to the position shown in the figure, the clamping piece 100 from exercise bars 200 upper separation, sport bar 200 Can no longer drive the gripper 100 move, lose the grip on the 100 controls, grippers 100 is kept locked. exercise bar during this process 200 The movement stroke is the inner disengagement stroke.

Please refer to the picture 14 and 15 , exercise rod 200 After completing the inner disengagement stroke, enter the outer disengagement stroke. when sports bar 200 When moving to the position shown in the figure, the clamping piece 100 and separate base 500 Separation, so far, clamp 100 is left on the object it holds. separate base 500 , sports bar 200 and transmission components 300 Can be withdrawn from the body of the test subject. exercise bar during this process 200 The movement stroke is the outer disengagement stroke.

In the structures shown in the above-mentioned embodiments, the sleeve in the existing structure is omitted, and the movement rod 200 Direct Drive Grippers 100 , combined with a bendable part 1112 The deformation state, so that the clamping parts 100 of opening and closing. Due to the lack of sleeve pair clamping arm 110 The limiting action, the clamping arm 110 from the bendable 1112 Begins to deform, its deformed area is closer to the entire clamping part 100 bottom, therefore, under the same opening width requirements, the one-piece clamp 100 The length of the clamping arm is longer than that of the prior art 110 The combination with the sleeve is shorter. While at the same length, the one-piece clamp 100 Capable of clamping arms than prior art 110 The combination with the sleeve opens a wider angle, which makes it easier to bite into the target tissue. When the clamp 100 with separate base 500 After disengagement, this shorter clip 100 Temporarily staying in the target object can reduce the discomfort caused by the excessive length of the clip left by the hemostatic clip (or tissue clip), and can also try to avoid the excessive length of the clip left by the hemostatic clip (or tissue clip) Problems causing excessive wear on the target. In addition, the one-piece structure avoids the part fit clearance necessary for shaft hole fit or sliding displacement, so the clamp arm 110 The bending repeatability is higher.

Moreover, the entire clamp 100 The processing process is simple. Compared with the combined structure of multiple parts in the existing hemostatic clip (or tissue clip), the one-piece clip is adopted 100 Finally, the entire clamping device has fewer parts, a simpler structure, lower assembly requirements, greatly reduced costs, and higher control accuracy. Likewise, the entire clamp 100 The length is also shorter than that of the existing hemostatic clips (or tissue clips). Due to the very limited inner diameter of the endoscopic instrument channel, this shorter length grip 100 Easier passage of endoscopic instrument channels.

Further, as mentioned above, the bendable part 1112 The bending deformation is achieved by its one-piece structure. Please refer to the picture 3 , 7 , 16-19 , in some embodiments, the clamp 100 close to separation base 500 One end is the proximal end, facing away from the separation base 500 One end is the distal end, self-clamping piece 100 The direction of the proximal end to its distal end is the clamping member 100 portrait. In order to realize the one-piece deformation structure, the deformation structure includes several first contraction joints 1113 , the first shrinkage joint 1113 Arranged vertically. The first contraction joint 1113 It can be realized by laser cutting process, for example, metal plate or pipe is used to process the first shrinkage seam by laser cutting process 1113 .

In one embodiment, as shown in the figure 2 shown, the clamp 100 In the initial state held in clamped state, the first shrinkage joint 1113 maintained at the initial state, the bendable part 1112 All parts are not deformed. as shown in the picture 3 shown, when it is necessary to open the clamp 100 , the bendable part 1112 Outward deformation, first contraction joint 1113 shrinkage deformation, so that the bendable part 1112 outside of the (clamp arm 110 sides facing away from each other) contract so that the entire clamping head 1111 Open up.

Please refer to the picture 2 , 3 , 16-19 , in one embodiment, the first contraction joint 1113 Around the bendable part 1112 circumferential extension. first contraction joint 1113 set in parallel. Of course, the first contraction joint 1113 In addition to being parallel to each other, other non-parallel arrangements can also be arranged. while the first shrinkage seam 1113 set to uniform along the bendable section 1112 Circumferential parallel arrangement, can unify each first contraction joint 1113 The direction of bending deformation, so that the clip 100 The bending deformation is smoother and more stable.

In order to achieve smoother bending changes, in one embodiment, the first contraction joint 1113 Divided into several groups, the first contraction joint of each group 1113a has at least one primary shrinkage seam 1113 . as shown in the picture 2 , 3 and figure 16-17 As shown, in this embodiment, each group of first contraction joints 1113a With two first shrinkage seams 1113 . as shown in the picture 18 and 19 As shown, in this embodiment, each group of first contraction joints 1113a has a first shrinkage seam 1113 . Each first shrinkage seam 1113 The shrinkage can make the bendable part 1112 With a certain bending angle, in multiple groups of first contraction joints 1113 Under the combination, the bendable part can be 1112 Has a larger opening and closing angle. All first contraction joints in longitudinal direction 1113 The length formed by the combination determines the entire bendable part 1112 The bending deformation area, the first contraction joint group can be flexibly set according to actual needs 1113a The number of adjacent first contraction joint group 1113a Longitudinal clearance and the first contraction joint group 1113a inner first contraction joint 1113 quantity etc. For example, the first contraction joint group 1113a Can be 4-6 Group.

Please refer to the picture 19 , in one embodiment, the first contraction joint 1113 In the shape of a long groove, the first contraction joint 1113 The middle part has two opposite convex arc sides 1113b . When the clamp 100 When opened to a limited position, the arc edge 1113b will touch each other, thus determining the maximum angle of opening. When the clamp 100 When in clamping state, the arc edge 1113b will come into contact with each other so that the gripper 100 Provide support.

Considering the needs of minimally invasive surgery, the clipping device is usually a very fine and small structure. Therefore, on the premise of satisfying the small volume of the clipping device, the clip 100 Generally, thicker materials are not suitable. However, thinner thickness requirements may result in bendable parts 1112 The weakening of the strength, specifically, as shown in 3 As shown, when the external force applied by the operator is too large, causing the clamping arm 110 When bent outward at an excessive angle, it may cause the clamping arm 110 from the bendable 1112 broken. Based on this, in an embodiment, as shown in the figure 3 shown, the bendable part 1112 With limit structure 1114 , limit structure 1114 Used to limit the bendable part 1112 The maximum angle to bend in the flared direction. That is, within the maximum angle, the bendable part 1112 Can be bent freely. When its bending angle reaches the maximum angle, the limit structure 1114 comes into play, restricting the bendable part 1112 Continue to bend outwards to protect the bendable part 1112 and clamping parts 100 role. The limiting structure 1114 Mainly through the clamping parts 100 The upper limit of the longitudinal limit is used to limit the maximum angle.

Please refer to the picture 3 and figure 16-19 , one embodiment, each limiting structure 1114 Includes several edge clips 100 Vertically aligned spacer units 1114a . limit unit 1114a Including the first limit block set relative to 1115 and the second limit block 1116 . as shown in the picture 17 middle a , b As shown in the two partial enlarged figures, the first limit block 1115 with the second limit block 1116 with gaps arranged longitudinally between 1117 , in the bendable part 1112 In the process of bending to the opening direction, the first limit block 1115 with the second limit block 1116 Close to each other and form a snap-fit structure (see Fig. 17 middle b Enlarged view shown). That is, in the initial state, the first limit block 1115 with the second limit block 1116 Between as shown 17 middle a gap shown 1117 , when the holder 100 When gradually opening outwards, the first limit block 1115 with the second limit block 1116 Relative movement between the longitudinal direction, the gap 1117 gradually becomes smaller, and finally when the bendable part 1112 When the maximum angle is reached, as shown in the figure 17 middle b As shown, the first limit block 1115 with the second limit block 1116 fit each other to form a limit.

as shown in the picture 16-19 , in one embodiment, the first limit block 1115 with the second limit block 1116 It is two interlocking limit hook structures. The limit hook structure can also be replaced by other structures with similar functions. as shown in the picture 3 , one embodiment, the first contraction joint 1113 in the bendable 1112 Circumferential middle, limit structure 1114 For at least two groups, in the flexible part 1112 In the circumferential direction, the bendable part 1112 There are limit structures on both sides 1114 , can further ensure that the entire bendable part 1112 Ability to synchronize bending changes and limits.

Please refer to the picture 3 and figure 16-19 , one embodiment, the same limiting unit 1114a In, the first limit block 1115 and the second limit block 1116 by the bendable part 1112 on the first contraction joint 1113 The side wall of the side is divided, and the first limit block 1115 and the second limit block 1116 close to the first contraction joint 1113 One end is connected as a whole, and the other end is separated from each other. When the clamp 100 When opening outwards, the first limit block 1115 and the second limit block 1116 Also available with clamp 100 Open up.

as shown in the picture 3 and figure 16-19 Shown, the first contraction joint of each group 1113a Compatible with a limit unit 1114a Aligned in the circumferential direction, thus ensuring that the limit unit 1114a The limit function can accurately act on the corresponding first contraction joint 1113 to prevent the first contraction joint after bending to the maximum angle 1113 Continue to shrink and deform to form a bendable part 1112 of the break.

The limit unit 1114a The number can be more than the first contraction joint group 1113a amount so as to completely cover all first contraction joints in the longitudinal direction 1113 , to play a better limiting role. Of course, the limit unit 1114a The number can also be less than or equal to the first contraction joint group 1113a quantity.

Further, please refer to Fig. 16-19 , in one embodiment, the first limit block 1115 and the second limit block 1116 with at least a portion of the region along the bendable portion 1112 The circumferential setting of the second contraction joint 1118 . The second contraction joint 1118 Able to place the first limit block 1115 and the second limit block 1116 separated so that the two can move relative to each other. The second contraction joint 1118 with the first limit block 1115 and the second limit block 1116 gap between 1117 connected.

Considering the clamp 100 The bending movement to the opening direction and the bending movement to the clamping direction are often accompanied by a twisting movement around its circumference, so please refer to Fig. 16-19 , in one embodiment, each group of first shrinkage joints 1113a The two ends respectively extend into two adjacent limit units in the longitudinal direction 1114a the second contraction joint 1118 Between, the first contraction joint 1113 with the second contraction joint 1118 The overlapping region between forms the distorted deformation segment 1119 , so that the bendable part 1112 Capable of bending and torsion deformation. After setting the warp segment 1119 , the holder 100 The bending deformation is smoother, while also avoiding the bendable part 1112 Broken due to torsion. By adjusting the warp deformed segment 1119 The circumferential length and longitudinal height of the bendable part can be further changed 1112 The maximum opening angle, bending softness or support, which can be flexibly set according to actual needs. For example, the distorted segment 1119 Through its own structure, it can also play the role of limiting the maximum opening angle, which can be combined with the above-mentioned limiting structure 1114 combined to form a bendable part 1112 The maximum opening and closing angle.

in the figure 17 and 19 In the illustrated embodiment, the second contraction joint 1118 Set in a straight line. in the figure 18 In the illustrated embodiment, the second contraction joint 1118 presented u shape settings.

Further, as mentioned above, when the clip 100 Gripping target 1 rear, sports bar 200 with clamping parts 100 Move together to the predetermined locking structure for locking. However, in actual use, when the clamp 100 When the hardness or thickness of the clamped human tissue is different (as shown in the figure 20 and twenty one shown), will limit the clip 100 closing angle. Because the closed angle and the movement rod 200 Stroke correlation, at this time, causes the gripper 100 and sports bars 200 Cannot move to the position of the locking structure, clamp 100 Unable to stay in clamped state.

For this problem, please refer to Fig. 20 and twenty one , the second contraction joint 1118 There is a gap in the longitudinal direction. Limiting structure 1114 the second contraction joint 1118 Form an adaptive floating structure that can deform towards the clamping direction, so that the clamping part 100 Gripping target 1 , the bendable part 1112 according to the target 1 The volume of the self-adaptive bending deformation towards the closing direction, towards the movement rod 200 and clamping parts 100 Provides an adaptive range of travel that increases the movement of the rod 200 Rigid body deformation margin of , always let the motion rod 200 and clamping parts 100 It can move to the locking position of the locking structure to realize accurate and reliable locking.

Specifically, please refer to Fig. 20 , when the holder 100 Gripping Thin Targets 1 , the holder 100 Can be closed normally, second contraction seam 1118 Keep the normal clearance (as shown in the 20 middle a Enlarged part shown) Sports Rod 200 and clamping parts 100 As shown in the locking stroke above, it can be accurately moved to the position of the locking structure, and the clamping part 100 Locked in clamped state. Please refer to the picture twenty one , when the holder 100 Holds thicker objects 1 , the holder 100 cannot be closed as shown in the figure 20 degree shown, at this point, continue to pull the movement lever 200 , the second contraction joint 1118 able to clamp 100 The deformation of the closing direction (as shown in the figure twenty one middle a Enlarged view shown). For example, in one embodiment, each second contraction joint 1118 can be provided vertically 0.02-0.05MM of compression, the second contraction joint at the illustrated quantity 1118 Next, multiple second contraction joints 1118 After accumulation, it can provide nearly 0.1-0.2mm The amount of deformation, so that the bendable part 1112 as shown in the picture twenty one Bending deformation occurs inward as shown (Fig. twenty one Middle bendable part 1112 Slightly convex deformation on both sides) to compensate for clamping 100 upper loss of travel, so that the gripper 100 Finally, it can be locked to the locking structure.

The above-mentioned embodiment shows a kind of bendable part 1112 The structure that realizes bending deformation by opening shrinkage joints, the bendable part of this embodiment 1112 The deformed structure is not limited thereto, and it can also be realized in other ways. For example, please refer to Fig. twenty two , in one embodiment, the clamp 100 , the bendable part 1112 Can be made of more flexible materials, e.g. than clamping heads 1111 and connecting part 120 (details will be described later) materials that are easier to bend and deform, such as metal or plastic materials with better bending properties, so that the sports bar 200 drive clamp 100 During movement, the bendable part 1112 Able to preferentially bend deformation. Of course, the bendable 1112 Other structures with better bending deformation properties, such as metal braided structures, can also be used.

Please refer to the picture twenty three , in one embodiment, the clamp 100 In, the bendable part can also be 1112 The thickness is set to be thinner than other parts, such as the clamping head 1111 and connecting part 120 thinner, thus making the sports bar 200 drive clamp 100 During movement, the bendable part 1112 Able to preferentially bend deformation.

Further, in order to make the clamp 100 reduce mutual interference when closed, in one embodiment, the clip 100 Avoidance structure is provided at the opposite end between 1110 , so that in the holder 100 Avoid each other when closing. Please refer to the picture 18 , in this example, the clamp 100 The opposite end of the retracts inward to form an avoidance structure 1110 , two opposing clamps 100 An escape groove is formed between the retracted areas. The width of the avoidance groove is along the clamping piece 100 The longitudinal direction of the gradually becomes larger, wherein the avoidance groove is close to the clamping head 1111 One end is wider than the other. Of course, the avoidance structure 1110 It can also be other structures capable of avoiding the function, and is not limited to the structure shown in the figure.

Further, in the sports bar 200 Available in various forms of structures and clamps 100 connection, as long as it is possible to drive the clamp 100 Just move in the direction of opening and clamping. the exercise bar 200 can be used with clamping parts 100 Direct connection, also possible to connect structures via clips 600 with clamp 100 connect.

Please refer to the picture 7 and twenty four , in one embodiment, the clamp connection structure 600 Includes two connecting rods 610 , the two connecting rods 610 one end of which is connected together to the movement rod 200 The distal end of the shaft can be rotated at the same time 620 Rotate, and the other end is respectively connected with the clamping head 1111 It can also be rotated around the horizontal axis on the connection. link 610 Components are similar Y font, the purpose is to move the rod 200 The thrust and pull force of the up and down movement is effectively transmitted to the clamping head 1111 on, to achieve the clamping head 1111 opening and closing control.

Please refer to the picture twenty four , in the exercise bar 200 When moving in the first stroke, with the movement rod 200 Departure Control Handle 400 movement at one end, gripper 100 Can be opened in the open direction. Among them, the connecting rod 610 with exercise bars 200 center of rotation A able to go over the connecting rod 610 with clamping head 1111 The line connecting the two centers of rotation B , so as to form a self-locking, so that the clamp 100 Keep it in an open state, and it cannot be easily closed by external force, only by controlling the handle 400 Control Gripper 1111 take back.

Of course, the clip connection structure 600 Other structures can also be used for connection, such as various clamping arms disclosed in the prior art 110 Connection method with tie rod.

Further, please refer to Fig. 3 , 4 and 5 , one embodiment, the clamp 100 Including connection part 120 . Connection 120 , bendable part 1112 and clamping head 1111 sequentially connected as one. separate base 500 Detachable connection to the connection part 120 superior.

Please refer to the picture 3-15 , the junction 120 With the above locking structure 121 , locking structure 121 for clamping 100 Locked in clamped state. Of course, in other embodiments, the clip 100 may not include connection 120 , the locking structure 121 Can be installed directly on the bendable part 1112 or other structures.

In one embodiment, the exercise bar 200 Or clip connection structure 600 With locking fit 631 , in the exercise bar 200 When moving along the third stroke, the locking structure 121 in locking fit 631 on the path of movement; when the locking fit 631 Movement to Locking Structure 121 At the same time, the two form a locking fit, and the clamping part 100 remain clamped.

Please refer to the picture 6-15 , one embodiment, the clamp 100 form a cylindrical structure. sports bar 200 One end extends into the cylindrical structure and is connected with the clamping piece 100 connect. Lock fit 631 including facing clips 100 The elastic body provided by the protrusion, for example, the elastic body is a shrapnel, and the shrapnel moves towards the clamping part along its protrusion direction. 100 The distal side is tilted. Locking structure 121 Includes snap slots to engage elastomers. The elastomer is located in the clip 100 and in a state of extrusion deformation, the elastic body can engage with the slot under the action of elastic force.

Specifically, please refer to Fig. 15 , in one embodiment, the locking fit 631 set up a cylinder 630 on, the cylinder 630 Connecting structures for clips 600 part of which can pass through the axis 620 with connecting rod 610 Form a linkage structure. the exercise bar 200 from the cylinder 630 inside through, and with the shaft 620 connect. the cylinder 630 Able to follow the movement bar 200 to the control handle 400 One side moves until it is locked by the locking structure.

In other embodiments, other structures that may realize the locking function can also be used, for example, the clamping arm disclosed in the prior art can be used 110 Or the locking method of the pull rod and the sleeve.

In order to lock the clamp more stably 100 , please refer to Fig. 15 , one embodiment, the locking structure 121 and locking fit 631 Both are more than two (two in the figure). In order to be evenly stressed, in one embodiment, the locking structure 121 Around the clamp 100 Evenly distributed in the circumferential direction (that is, adjacent locking structures 121 spaced at the same angle), the locking fit 631 with clamp 100 Relatively positioned, e.g. also around a movement bar 200 uniform distribution around the circumference.

Further, please refer to Fig. 7 , 13 and 15 , one embodiment, in order to install the separation base 500 , the junction 120 card joint 122 , separate base 500 with feet 510 . feet 510 with snap joint 122 Snap connection. sports bar 200 with push top 283 , in the exercise bar 200 When moving along the third stroke, the base is separated 500 set on push top 283 on the moving path, push the top 283 Ability to push to separate base 500 to the control handle 400 One side movement to separate joints 120 and separate base 500 . Please refer to the picture 13 and 15 , such as separating the base 500 has a push top 283 Lumps on the path of travel 530 , the raised portion 530 Separation base that can be cylindrical 500 the bottom of the 200 through holes. separate base 500 To connect with 120 snap-in, its feet 510 A bent buckle can be arranged on the top, and the buckle 122 It may be a card slot matched with a buckle, and the buckle extends into the card slot for fastening connection. This connection is at the top of the push 283 Under the push of the top, the buckle can be deformed, so that the 122 up and out.

Further, please refer to Fig. 7-15 , an embodiment in which the motion bar 200 Internal detachment is realized through the structure of split combination. Specifically, the exercise rod 200 With snap slot 281 , the card slot 281 has an opening smaller than its cavity 282 , the exercise bar 200 Through the slot 281 Connection structure with clamp 600 Card connection, specifically can be connected to the connecting rod 610 the installation shaft 620 superior. in exercise bars 200 Restricted by this opening when moving along the first and second strokes 282 The blocking effect, the clip connection structure 600 and clamping parts 100 with exercise bar 200 move together to achieve clamping 100 opening and clamping. as shown in the picture 25 shown, when the movement bar 200 After being located within the disengagement stroke, the clamp 100 and clamp connection structure 600 is blocked and cannot continue to the control handle 400 One side moves, at this time, under the action of external force, the clamping piece connects the structure 600 From the card slot 281 opening 282 middle disengagement, exercise bar 200 Since then the structure is connected with the clamp 600 Break away, achieve inner breakaway.

The above is only an example of an internal detachment structure. In other embodiments, the movement rod 200 It can also be an integrally formed structure. For example, in one embodiment, the motion bar 200 The retaining section and the separating section are provided, and the retaining section and the separating section are connected as a whole through the second tearing part. The retaining section is connected with the holding body, and the locking matching part is located on the retaining section. in exercise bars 200 When moving along the third stroke, the second tearing part breaks, and the retaining segment and the separating segment are separated. In addition, sports bars 200 and clamping parts 100 Other internal detachment structures can also be used to achieve separation, such as Using the pull rod and clamping arm in the prior art 110 internal detachment structure, etc.

Further, please refer to Fig. 1 and 7 , in the transmission assembly 300 aspect, the bushing assembly 310 Usually includes a spring support sleeve 311 ,Transmission Parts 320 (e.g. traction control line) passed on the spring support sleeve 311 middle. the exercise bar 200 Can be converted to pottery through variable diameter 321 Or other structures and transmission parts 320 Fixed connection. spring support sleeve 311 The outer casing is fixed with a connecting pipe 312 ,Connecting pipe 312 fixed seat 313 . The connecting pipe 312 with separate base 500 and clamping parts 100 Rotate the connection so that the entire clamp 100 Detachable base 500 Relative transmission components together 300 turn.

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

Claims (20)

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

   A clamping piece, the clamping piece includes at least two clamping arms, the clamping arms are split structures and connected to each other, each of the clamping arms includes a clamping head and a bendable part; In one of the clamping arms, the clamping head and the bendable part are split structures and are connected to each other, or the clamping head and the bendable part are integrally formed; the clamping arm is used for clamping Hold the target; the bendable portion has a deformable structure capable of bending toward the closing direction of the clamping member and/or bending toward the opening direction of the clamping member;

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

   A clamping piece, the clamping piece includes at least two clamping arms, each of the clamping arms includes a clamping head and a bendable part, and the clamping head and the bendable part in each of the clamping arms It is a split structure, the two are connected to each other, and the bendable parts of different clamping arms are integrally formed, and the clamping arms are used to clamp the target; the bendable part has a A deformed structure that bends in the closing direction of the holding member and/or bends in the opening direction of the holding member;

   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.
3. The insertable tissue clipping device according to claim 1 or 2, 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.
4. The insertable tissue clamping device according to claim 3, 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.
5. The insertable tissue clamping device according to claim 4, wherein the first contraction seam extends around the circumference of the bendable portion.
6. The insertable tissue clamping device according to claim 4 or 5, wherein the bendable portion has a position-limiting structure, and at least one side of the bendable portion is provided with a The limiting structure is provided to limit the maximum angle at which the bendable portion bends toward the opening direction.
7. The insertion-type tissue clipping device according to claim 6, 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 bendable part is bent toward the opening direction During the process, the first limiting block and the second limiting block approach each other and form a buckling structure.
8. The insertable tissue clipping device according to claim 7, wherein, in the same limiting unit, the first limiting block and the second limiting block are positioned on the first limiting block by the bendable portion. A side wall on the side of the contraction joint is formed by dividing, 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.
9. The insertable tissue clamping device according to claim 8, wherein the initial state of the clamping member is a clamping state; the second shrinkage seam has a gap in the longitudinal direction, and the limiting structure The second contraction joint of the second contraction joint constitutes an adaptive floating structure capable of deforming toward the clamping direction, so that when the clamping member clamps the target, the bendable portion can move toward the target according to the volume of the target. Adaptive bending deformation in the closing direction.
10. The insertion type tissue clamping device according to any one of claims 1-9, 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.
11. The insertion-type tissue clipping device according to any one of claims 1-10, wherein the clamping member includes a connection part, and the connection part and the bendable part are integrally formed or connected to each other; The clamping part is detachably connected to the separation base through the connection part, or the connection part and the separation base are integrally formed; the connection part has a locking structure, and the movement rod, clamping part or clamping A locking fitting part is provided on the connection structure of the parts, and when the moving rod moves along the third stroke, the locking structure is located on the moving path of the locking fitting part; when the locking fitting part moves When reaching the locking structure, the two form a locking fit to keep the clamping member in a clamping state.
12. The insertion type tissue clamping device according to claim 11, wherein the clamping member forms a cylindrical structure, and one end of the moving rod extends into the cylindrical structure, and is connected with the clamping The locking fitting part includes an elastic body protruding toward the clamping part, and the elastic body is inclined to the distal side of the clamping part along its protruding direction, and the locking structure It includes a slot that can cooperate with the elastic body. The elastic body is located in the clamping member and is in a state of extrusion deformation. The elastic body can be engaged with the slot under the action of elastic force.
13. A clamping part of a plug-in tissue clamping device, characterized in that the clamping part comprises at least two clamping arms, the clamping arms are split structures and connected to each other, each of the clamping arms The clamping arm includes a clamping head and a bendable part, and the same clamping arm has a split structure between the clamping head and the bendable part, and is connected to each other, or the clamping head and the bendable part Integral molding structure; the clamping arms are arranged in a jaw-type structure to clamp the target; the bendable part has the ability to bend toward the closing direction of the clamping member and/or to the clamping A deformed structure that bends in the unfolding direction of the piece.
14. A clamping part of a plug-in tissue clamping device, characterized in that the clamping part comprises at least two clamping arms, each of which comprises a clamping head and a bendable part, and each of the clamping arms The clamping head and the bendable part in the clamping arm are separate structures, and the two are connected to each other. The bendable parts of different clamping arms are integrally formed, and the clamping arms are in a clamping claw structure. Set to clamp the target object; the bendable portion has a deformable structure capable of bending toward the closing direction of the clamping part and/or bending toward the opening direction of the clamping part.
15. The clip according to claim 13 or 14, wherein the deformation structure includes several first contraction seams arranged in sequence along the longitudinal direction of the clip.
16. The clip according to claim 15, wherein the bendable portion has a plurality of second shrinkage seams extending along its circumference, and the second shrinkage seams are arranged along the longitudinal direction; The two ends of each group of the first contraction joints respectively extend into between two longitudinally adjacent second contraction joints, and the intersection between the first contraction joints and the second contraction joints The overlapping region forms a torsion section, so that the bendable portion can be bent torsionally deformed.
17. The clip according to claim 16, wherein the first shrinkage seam extends around the circumference of the bendable part; the bendable part has a limiting structure, and the limiting structure is at least two In the circumferential direction of the bendable part, at least one side of the bendable part is provided with the limiting structure, so as to limit the maximum angle of bending of the bendable part to the opening direction of the clamping member .
18. The clip according to claim 17, wherein each of the limiting structures includes several limiting units arranged in the longitudinal direction 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.
19. The clip according to claim 18, 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.
20. The clamping piece according to claim 19, wherein the initial state of the clamping piece is a clamping state; the second contraction joint has a gap in the longitudinal direction, and the second of the limiting structure The contraction joint constitutes an adaptive floating structure capable of deforming toward the clamping direction, so that when the clamping member clamps the target, the bendable portion can move toward the closing direction according to the volume of the target. Adaptive bending deformation.