Insertable tissue clamping device

Abstract

An insertable tissue clamping device, the clamping structure of which has a locking and mating part, and the moving part has a locking part. The locking part locks with the locking and mating part when the clamping arm clamps the target tissue to prevent the clamping arm from opening, so that the clamping arm can be stably held in the clamping state.

Description

Technical Field

[0001] This application relates to the field of medical devices, and particularly to the structure of an insertable tissue clamping device for surgery. Background Art

[0002] The insertable tissue clamping device is an insertable medical device used to clamp tissues in the human body or animal body to achieve the functions of hemostasis or closure, and it includes hemostatic clips, tissue clips, etc.

[0003] 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 treatment purpose. For example, hemostatic clips (or tissue clips) that have been widely used are used for hemostasis or closure at the bleeding or traumatic sites in the gastrointestinal tract.

[0004] The existing clamping devices usually connect the slider and the clamping arm through a connecting arm. The connecting arm moves driven by the slider, and then drives the clamping arm to open and close. When the clamping arms are separated, a locking structure is also required to lock the clamping arms to ensure that the clamping arms are in the clamping state. However, this structure has many parts and is complex, and needs to be further optimized. Summary of the Invention

[0005] This application provides an insertable tissue clamping device to show a structure that is simpler and can lock the clamping arms in the clamping state.

[0006] Based on the above purpose, in one embodiment of this application, an insertable tissue clamping device is provided, including:

[0007] A clamping structure,

[0008] which includes at least two clamping arms for clamping the target tissue;

[0009] And a motion control component, the motion control component includes a moving part, the moving part is arranged in the clamping structure in a way that it can move axially along the clamping structure, and the moving part is connected to the clamping arm to drive the clamping arm to open and close;

[0010] The clamping structure has a locking engagement part, and the moving part has a locking part. The locking part is used to lock with the locking engagement part when the clamping arm clamps the target tissue to prevent the clamping arm from opening.

[0011] In one embodiment, the locking part is a clamping platform arranged on the moving part, and the locking engagement part is an inwardly extending elastic buckle. The elastic buckle is arranged on the path of the clamping platform moving backward. When the clamping arms are separated, the elastic buckle abuts against the front side of the clamping platform to prevent the clamping platform from moving forward to the front end of the clamping structure.

[0012] In one embodiment, the clamping arm includes a clamping head and a bendable portion. The clamping head and the bendable portion are relatively fixed. The bendable portion has a bending structure that can bend in the closing direction of the clamping arm and / or in the opening direction of the clamping arm.

[0013] In one embodiment, the clamping structure includes a support arm located between the clamping arms, and the locking and mating portion is provided on the support arm.

[0014] In one embodiment, the elastic snap is arranged longitudinally along the support arm.

[0015] In one embodiment, the elastic snap is formed by protruding inward from a partial area of the support arm, and the elastic snap and the support arm are of an integrally formed structure.

[0016] In one embodiment, at least one of the support arms has a limiting and guiding portion arranged longitudinally along it, the moving member has at least one limiting and guiding mating portion, and the limiting and guiding mating portion cooperates with the limiting and guiding portion to limit the movement of the moving member in the direction defined by the limiting and guiding portion.

[0017] In one embodiment, there are at least a pair of oppositely arranged support arms, one of the support arms has the locking and mating portion, and the other support arm has the limiting and guiding portion.

[0018] In one embodiment, one of the limiting and guiding portion and the limiting and guiding mating portion is a guide groove, and the other is a protruding guide block, and the guide block extends into the guide groove.

[0019] In one embodiment, the support arms are relatively arranged at the notch between the two clamping arms.

[0020] In one embodiment, the bendable portion has at least one annular deformation portion. When the clamping arm is in the clamping state, the deformation portion can be squeezed and deformed inward to drive the whole clamping arm to move toward the rear end of the insertable tissue clamping device.

[0021] In one embodiment, the deformation portion has a front arch portion protruding toward the front end of the deformation portion and a rear arch portion protruding toward the rear end of the deformation portion, and the front arch portion and the rear arch portion can be squeezed and deformed inward when subjected to sufficient external force.

[0022] In one embodiment, the bendable portion includes a plurality of first shrinkage seam groups and second shrinkage seam groups. Each first shrinkage seam group has at least one first shrinkage seam, and each second shrinkage seam group has at least one second shrinkage seam. The first shrinkage seams and the second shrinkage seams are arranged to extend circumferentially along the bendable portion; the first shrinkage seam groups and the second shrinkage seam groups are arranged at intervals longitudinally along the clamping arm; an overlapping area between the first shrinkage seams and the second shrinkage seams forms a twisting and deforming section, so that the bendable portion can be bent and twisted and deformed.

[0023] In one embodiment, the first shrinkage seam groups and the second shrinkage seam groups are arranged on the front side of the deformable portion, and the twisting and deforming section is connected to the front part of the deformable portion.

[0024] In one embodiment, two second shrinkage seams are arranged between adjacent first shrinkage seam groups. The two second shrinkage seams are respectively arranged on two sides of the bendable portion, and the second shrinkage seams extend outwardly and penetrate through to the corresponding side edges on the bendable portion.

[0025] According to the plug-in tissue clamping device of the above embodiment, its clamping structure has a locking and mating portion, and the moving member has a locking portion. The locking portion locks with the locking and mating portion when the clamping arm clamps the target tissue, so as to prevent the clamping arm from opening, so that the clamping arm can be stably maintained in the clamping state. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the plug-in tissue clamping device in one embodiment of the present application, in which the transmission component is drawn in an omitted way;

[0027] Figure 2 It is a schematic structural diagram of the clamping arm in the open state in one embodiment of the present application;

[0028] Figure 3 and 4 It is a cross-sectional view of the clamping structure in the open state in one embodiment of the present application. At this time, the transmission member is in the first stroke, and the moving direction of the transmission member is as shown by the arrow;

[0029] Figure 5 It is a schematic structural diagram of the clamping arm in the clamping state in one embodiment of the present application;

[0030] Figure 6 and 7 It is a cross-sectional view of the clamping structure in the clamping state in one embodiment of the present application. At this time, the transmission member is in the second stroke, and the moving direction of the transmission member is as shown by the arrow;

[0031] Figure 8 It is an exploded view of each part at the front end in one embodiment of the present application;

[0032] Figure 9 Schematic diagram of the cooperation structure between the rocker arm and the limiting member in an embodiment of the present application;

[0033] Figure 10 Schematic diagram of the cooperation structure between the limiting member and the support arm in an embodiment of the present application;

[0034] Figure 11 Exploded schematic diagram of the cooperation structure between the rocker arm and the moving member in an embodiment of the present application;

[0035] Figure 12 Schematic diagram of the rocker arm structure in an embodiment of the present application;

[0036] Figure 13 Schematic diagram of the structure when the clamping arm is in the clamping and self-locking state in an embodiment of the present application. At this time, the transmission member is in the third stroke, and the movement direction of the transmission member is as shown by the arrow;

[0037] Figure 14 and 15 Cross-sectional view of the clamping arm in the clamping and self-locking state in an embodiment of the present application;

[0038] Figure 16 Schematic diagram of the structure when the clamping arm is in the clamping and locking state in an embodiment of the present application;

[0039] Figure 17 and 18 Cross-sectional view of the clamping arm in the clamping and locking state in an embodiment of the present application. At this time, the transmission member is in the third stroke, and the movement direction of the transmission member is as shown by the arrow;

[0040] Figure 19 Schematic diagram of the cylindrical clamping structure after being unfolded longitudinally in an embodiment of the present application;

[0041] Figure 20 Schematic diagram of the annular deformation part in the natural state in an embodiment of the present application;

[0042] Figure 21 Schematic diagram of the structure when the clamping arm is in the clamping state and the moving member is separated from the transmission member in an embodiment of the present application;

[0043] Figure 22 Cross-sectional view of the clamping arm in the clamping state and the moving member separated from the transmission member in an embodiment of the present application. At this time, the transmission member is in the third stroke, and the movement direction of the transmission member is as shown by the arrow;

[0044] Figure 23 Cross-sectional schematic diagram of the process of the separation of the moving member and the transmission member in an embodiment of the present application;

[0045] Figure 24 and 25 is a schematic structural view after separation of the separation base, the clamping arm and the support arm outside when the clamping arm is in a clamping state in an embodiment of the present application;

[0046] Figure 26 is a cross-sectional view after separation of the separation base, the clamping arm and the support arm outside when the clamping arm is in a clamping state in an embodiment of the present application. At this time, the transmission member is in the third stroke, and the movement direction of the transmission member is as shown by the arrow. Specific embodiments

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings through specific embodiments. Similar elements in different embodiments are labeled with related similar element numbers. In the following embodiments, many details are described to enable a better understanding of the present application. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by excessive description. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0048] In addition, the features, operations, or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be reordered or adjusted in an obvious manner by those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for clearly describing a certain embodiment, and do not mean that they are the necessary sequences, unless it is stated that a certain sequence must be followed.

[0049] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. And the "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct and indirect connection (coupling).

[0050] This embodiment provides an insertable tissue clamping device (hereinafter referred to as a clamping device for convenience). The clamping device is used to clamp tissues in a human or animal body (collectively referred to as target tissues) to play a role in hemostasis or closure, and it can include but is not limited to hemostatic clips, tissue clips, etc. The clamping device can be a disposable instrument or a reusable instrument.

[0051] Please refer to Figure 1-7In one embodiment, the clamping device includes a clamping structure 1, a control handle 3, a motion control component 4, a transmission component 5 and other related components.

[0052] The control handle 3 is an operating component for controlling the clamping device. The operator can manually operate the opening and closing of the clamping structure 1 through the control handle 3 to clamp the target tissue 2. For the convenience of description, the application defines the end where the clamping structure 1 is located in the entire clamping device as the front end, and the end where the control handle 3 is located as the rear end. The front and rear directions of other components are based on this direction.

[0053] The clamping structure 1 is a structure for grasping target tissue, and has at least two clamping arms 100. The clamping arms 100 clamp the target tissue under the drive of the motion control assembly 4.

[0054] The function of the motion control assembly 4 is to drive the clamping arm 100 to move in the opening direction and the closing direction. Figure 2-7 as well as Figure 11-12 , the motion control component 4 includes a moving part 410. The clamping structure 1 defines a motion space arranged along its axial direction, and the moving part 410 is arranged in the clamping structure 1 in a manner that it can move along the axial direction of the clamping structure 1. The moving part 410 is directly or indirectly connected to the clamping arm 100 to form a linkage structure. The moving part 410 is used to be linked with the control handle 4. Under the control of the control handle 1, the moving part 410 reciprocates in the motion space. When the moving part 410 moves toward the front end of the clamping structure 1, the clamping arm 100 is stretched open, so that the clamping arm 100 is in an open state; when the moving part 410 moves toward the rear end of the clamping structure 1, the clamping arm 100 is pulled closed, so that the clamping arm 100 is in a clamping state.

[0055] In one embodiment, the clamping arm 100 may adopt an integral fixed structure, with one end of the two rocker arms 420 being hinged to the moving part 410 , and the other end being connected to a corresponding clamping arm 100 .

[0056] For example, see Figure 1-7 The motion control assembly 4 includes two rocker arms 420. One end of the two rocker arms 420 is hinged on the moving part 410, and the other end is connected to a clamping arm 100 respectively, for example, by laser or other forms of clamping, welding, bonding, screw locking, riveting and other fixing methods. For example, please refer to Figure 2-8 In one embodiment, the front end of the rocker arm 420 has a protruding connection portion 421, which is inserted into the corresponding clamping arm 100 and fixedly connected to the clamping arm 100, such as by ultrasonic welding.

[0057] The clamping arm 100 includes a clamping head 110 and a bendable portion 120. The clamping head 110 is used to clamp the target tissue 2, and by using the bending function of the bendable portion 120, it can be opened and closed under the drive of the moving member 410 and the rocker arm 420. The clamping head 110 and the bendable portion 120 are relatively fixed. This relative fixation can be achieved through an integrally formed structure (such as Figure 2-7 the illustrated embodiment), or can be connected into one body by fixing methods such as snap connection, welding, bonding, screw locking, riveting, etc. The integrally formed structure can be that the target object is integrally processed from the same material, rather than being assembled by combining two or more parts. The integrally formed structure (including the following other integrally formed structures) can be made by, but not limited to, injection molding, laser cutting, and other machining processes. In particular, when laser cutting is used, machining with extremely small gaps can be achieved, which is beneficial to the miniaturization of the overall structure and the improvement of structural compactness.

[0058] Among them, the clamping head 110 is a hard segment and is not easily deformed relative to the bendable portion 120. During the forward and backward movement of the moving member 410, the bending deformation of the bendable portion 120 precedes that of the clamping head 110 to ensure that the clamping arm 100 provides a better biting effect on the target object. The bending deformation of the bendable portion 120 is achieved through its structural deformation. For example, it can be achieved by setting a bending structure on the bendable portion 120 that can be twisted and deformed, or by changing the material thickness of the bendable portion 120, or by selecting a material that is easier to deform. Of course, it can also be achieved through other structures. This bending deformation of the bendable portion 120 is reversible, that is, the bendable portion 120 has elasticity and can rebound and reset when the external force is removed, so this bending deformation can be repeated.

[0059] In addition, the clamping structure 1 can also adopt an existing structure. For example, it further includes a sleeve. The inner cavity of the sleeve is a movement space. One end of the clamping arm is arranged in the sleeve, and the other end extends out of the sleeve. The moving member 410 is at least partially located in the sleeve and can reciprocate along the axial direction of the sleeve. Through the axial movement of the moving member 410 in the sleeve, the opening and closing of the clamping structure 1 are driven. At this time, the clamping arm 100 may not have a bendable portion 120 and is only a clamping head with a clamping function.

[0060] Furthermore, please refer to Figure 1-7 , in an embodiment, the two rocker arms 420 are cross - shaped distributed. The cross - shaped distributed rocker arms 420 can convert the axial reciprocating movement of the moving member 410 into the opening and closing movement of the clamping arm 100 to achieve the purpose of clamping the target tissue. The cross - rocker structure is simple and the force transmission between the moving member 410 and the clamping arm 100 is more stable.

[0061] Of course, in other embodiments, the two rocker arms 420 may also have other non-crossed structures, such as being distributed in an inverted V shape or in a || shape between the moving member 410 and the clamping arm 100.

[0062] In addition, in other embodiments, the moving member 410 and the rocker arm 420 may be integrally formed. In this case, the rocker arm 420 is only a part of the moving member 410. When the moving member 410 moves, the rocker arm 420 can undergo elastic deformation to meet the requirements of the opening and closing of the clamping arm 100.

[0063] Further, the transmission assembly 5 includes a transmission member 510 and a sleeve assembly 520. The transmission member 510 is connected to the moving member 410, and the separation base 200 is connected to the sleeve assembly 520, so that the entire clamping structure 1 is supported on the sleeve assembly 520. The sleeve assembly 520 is connected to the control handle 3, and the control handle 3 and the transmission member 510 form a linkage structure to control the movement of the transmission member 510 and the moving member 410.

[0064] Please refer to Figure 1 , in one embodiment, the control handle 3 may include a control portion 31 for controlling the transmission member 510 and a gripping portion 32 for the operator to grip. The control portion 31 can move relative to the gripping portion 32. In Figure 1 , the gripping portion 32 is a structure for the operator's thumb to insert, and the control portion 31 can move back and forth relative to the gripping portion 32. The control portion 31 can be connected to the transmission member 510 through a traction member to form a linkage structure. The traction member can be, but is not limited to, a steel wire rope or a traction rope made of other materials, as well as other components that can be used as the traction structure of the clamping device. Through the traction member, the operator can drive the transmission member 510 and the moving member 410 to move through the control portion 32, and further control the opening and closing of the clamping arm 100.

[0065] Among them, different movement strokes of the transmission member 510 correspond to different states of the clamping device. Specifically, the transmission member 510 has a first stroke, a second stroke, and a third stroke. In the first stroke, the transmission member 510 drives the clamping heads 110 to move away from each other, so that the clamping arm 100 moves to the open state, as shown in Figure 2-4 ; in the second stroke, the transmission member 510 drives the clamping heads 110 to move closer to each other, and the clamping arm 100 moves to the clamping state to clamp the target tissue 2, as shown in Figure 5-7 ; in the third stroke, the clamping arm 100 is locked in the clamping state, and the clamping arm 100 is separated from the transmission member 510 and the separation base 200, as shown in Figure 13-18 and Figure 21-26As shown. After the clamping arm 100 is completely separated from the transmission member 510 and the separation base 200, the clamping arm 100 can remain in the patient's body, and the part separated from the clamping arm 100 is taken out of the patient's body. The above process is a general introduction to the entire use process of this clamping device.

[0066] Further, when the transmission member 510 moves along the third stroke, a locking structure can be provided for locking to prevent the moving member 410 from resetting and causing the clamping arm 100 to open undesirably.

[0067] In one embodiment, the clamping structure 1 has a locking engagement portion, and the moving member 410 has a locking portion. When the clamping arm 100 is in the clamping state, the locking engagement portion and the locking portion can move relative to each other to the locking position. In this way, when the clamping arm 100 is separated from the transmission member 510, the locking portion and the locking engagement portion can form a lock in time to prevent the moving member 410 and the rocker arm 420 from moving towards the front end of the clamping structure 1 and prevent the clamping arm 100 from opening.

[0068] Please refer to Figure 16-18 , in one embodiment, the locking portion is a clamping platform 4122 provided on the moving member 410, and the locking engagement portion is an inwardly extending elastic snap 330. The elastic snap 330 is provided on the path of the clamping platform 4122 moving backward. When the clamping arm 100 is in the clamping state, the clamping platform 4122 can move backward and cross the position of the elastic snap 330. When the clamping arm 100 is separated from the transmission member 510, under the elastic restoring force of the clamping arm 100, the clamping platform 4122 can move forward a little distance with the moving member 410. When the elastic snap 330 abuts against the front side of the clamping platform 4122, it will prevent the clamping platform 4122 from continuing to move towards the front end of the clamping structure 1, thus forming a lock.

[0069] Please refer to Figure 16-18 , in one embodiment, in order to better guide the elastic snap 330 to move towards the clamping platform 4122, a slope 4122a extending longitudinally along its outer wall can be formed on the clamping platform 4122.

[0070] Further, in one embodiment, please refer to Figure 2-7 , the clamping structure 1 further includes a pair of support arms 300 located between the two clamping arms 100, and the support arms 300 are connected to the clamping arms 100. This connection can be achieved through an integrally formed structure (such as Figure 2-7 the embodiment shown) or can be connected as a whole by fixing methods such as clamping, welding, bonding, screw locking, riveting, etc.

[0071] Please refer to Figure 16-18, in one embodiment, the elastic buckle 330 is formed by protruding inward from a partial area of the support arm 300, and the elastic buckle 330 and the support arm 300 are of an integrally formed structure. This structure is simple to manufacture and can be integrally formed. For example, it can be processed by laser cutting without adding other parts. Moreover, the elastic buckle 330 can utilize the longitudinal space, making the elastic buckle 330 longer and with better elasticity while the clamping structure 1 maintains the same length.

[0072] Further, when the clamping arm 100 clamps the target tissue 2, the target tissue 2 exerts a reverse force on the clamping arm 100. Therefore, in order to firmly clamp the target tissue 2, it is necessary to ensure that the clamping device can provide sufficient biting force to the clamping arm 100. For this problem, please refer to Figure 2-10 , a limiting member 310 is provided on the pair of support arms 300, as Figure 4 shown, the limiting member 310 is located in the cross region 421 formed by the two rocker arms 420 and close to the moving member 410. Please refer to Figure 2-7 , when the moving member 410 moves backward, the limiting member 310 can contact at least one rocker arm 420 at least when the clamping arm 100 is in the clamping state, and form a fulcrum of a lever structure for at least one rocker arm 420.

[0073] In Figure 2-8 the embodiment shown, the rocker arm 420 serves both as a key part connecting the clamping arm 100 and the moving member 410 and as a part cooperating with the limiting member 310 to realize the lever structure. To meet the above two functions, the outer edge of the rocker arm 420 facing the limiting member 310 needs to be able to generate a force on the limiting member 310. Since the front end of the rocker arm 420 is fixedly connected (such as welded) to the middle part of the clamping arm 100, at this time, the clamping arm 100 and the rocker arm 420 can be regarded as the same force system, and the limiting member 310 can be used as the lever rotation fulcrum of the clamping arm 100. During the process of the moving member 410 moving backward, the displacement of the moving member 410 backward needs to be converted into the closing of the clamping arm 100. At this time, there are both relative sliding displacement and relative rotational displacement between the outer edge of the rocker arm 420 close to the limiting member 310 and the limiting member 310. The pulling force from the control handle 3 is converted into the downward pressure of the rocker arm 420 relative to the limiting member 310. Through the action of the limiting member 310 as the lever fulcrum, the acting force can be effectively transmitted to the other end of the rocker arm 420, and then transmitted to the front end of the clamping arm 100, thereby obtaining a greater clamping force (biting force).

[0074] In order to ensure that at least when the clamping arm 100 is in the clamping state, the lever structure formed by the limiting member 310 and the rocker arm 420 is a labor-saving lever. Therefore, in one embodiment, please refer to Figure 7At least when the clamping arm 100 is in the clamping state, the force arm b of the rotation center of the rocker arm 420 relative to the moving part 410 from the center of the stopper 310 is greater than the force arm c of the connection center of the rocker arm 420 and the clamping head 110 from the center of the stopper 310. In this way, when the clamping arm 100 is in the clamping state, the operator can use a more labor-saving method to make the clamping arm 100 obtain a greater bite force.

[0075] Of course, in other embodiments, at least when the clamping arm 100 is in the clamping state, the arm of force b between the rotation center of the rocker arm 420 relative to the moving member 410 and the center of the stopper 310 may also be equal to or less than the arm of force c between the connection center of the rocker arm 420 and the clamping head 110 and the center of the stopper 310. At this time, the lever is mainly used to change the direction of the force, so that the operator can more easily pull the transmission member 510 to make the clamping arm 100 better bite the target tissue 2.

[0076] Furthermore, after the clamping arm 100 bites the target tissue 2, in order to prevent the reverse force of the target tissue 2 from pushing the clamping arm 100 apart, in one embodiment, the stopper 310 and the rocker arm 420 can be combined to form a self-locking structure. Figure 12 and 15 In one embodiment, the two rocker arms 420 have locking mating surfaces 422. When the clamping arm 100 is in the clamping state, the locking mating surfaces 422 of the two rocker arms 420 form a locking groove 423. The limit member 310 is located in the locking groove 423 to prevent the two clamping arms 100 from lateral cross movement, so that the clamping arms 100 remain in the clamping state.

[0077] The realization principle of the self-locking is that when the clamping arm 100 is in the clamping state, the reverse force of the target tissue 2 that stretches the clamping arm 100 is converted into a lateral displacement of the rocker arm 420 relative to the limit member 310 through the rocker arm 420, and the force acting on the moving part 410 toward the front end becomes very small. At this time, the limit member 310 is located in the locking groove 423, which can prevent the rocker arm 420 from crossing and moving laterally, thereby opening the tissue clamping arm 100.

[0078] In one embodiment, the lateral dimension of the locking groove 423 is slightly greater than or equal to the lateral dimension of the limiting member 310. This can ensure that the limiting member 310 can enter the locking groove 423, and can also avoid large lateral movement of the clamping arm 100 due to excessive gap between the locking groove 423 and the limiting member 310, thereby preventing the clamping arm 100 from loosening the target tissue 2.

[0079] Meanwhile, when there is a self-locking structure formed by the above-mentioned limiting member 310 and the rocker arm 420, the reverse force of the target tissue 2 pushing open the clamping arm 100 is transmitted through the rocker arm 420 and converted into the lateral displacement of the rocker arm 420 relative to the limiting member 310, and the force acting on the moving member 410 towards the front end becomes very small. This also means that the elastic buckle 330 only needs to bear a relatively small force towards the front end to lock the entire clamping structure 1. Therefore, usually one elastic buckle 330 can achieve locking.

[0080] To form the self-locking structure as shown in Figure 7 and 15 in one embodiment, please refer to Figure 7 and 12 and 15, the rocker arm 420 has a locking mating surface 422 in an arc shape. The locking mating surface 422 is located on the front side of the guiding surface 424. When the clamping arm 100 is in the clamping state, the locking mating surfaces 422 of the two rocker arms 420 enclose a locking groove 423 in an arc shape. When the limiting member 310 is a cylindrical structure (such as a limiting shaft), the arc-shaped locking groove 423 can fit more closely with the limiting member 310.

[0081] Furthermore, when the moving member 410 moves towards the front end of the clamping device, it can drive the rocker arm 420 to push open the support arm 300, thereby switching the support arm 300 to the open state. To limit the opening angle of the support arm 300, an angle limiting structure can be provided on the support arm 300, or an angle limiting structure can be provided on the moving member 410 and / or the rocker arm 420.

[0082] For example, please refer to Figure 8 and 11 , in one embodiment, the front end of the moving member 410 has an angle limiting structure 414. When the clamping arm 100 is in the open state, the angle limiting structure 414 forms a limit at the rear side of the limiting member 310 to prevent the moving member 410 from continuing to move towards the front end and limit the opening angle of the clamping arm 100.

[0083] In one embodiment, the angle limiting structure 414 is a limiting groove provided on the surface of the front end of the moving member 410 facing away from the corresponding clamping arm 100. For example, both the first seat body 411 and the second seat body 412 have this limiting groove. As the angle limiting structure 414, when the clamping arm 100 is in the open state, the bottom of the limiting groove can contact the limiting member 310, thereby forming a limit to prevent the moving member 410 from continuing to move towards the front end and limit the opening angle of the clamping arm 100.

[0084] In another embodiment, the angle limiting structure can also be formed by the rocker arm 420. Please refer to Figure 2-4 and Figure 12, In one embodiment, the two rocker arms 420 are connected to one end of the moving member 410 and have a protruding limiting portion 427. When the clamping arm 100 is in the open state, the two limiting portions 427 form an angular limiting structure, such as a cross shape or just aligned left and right. This angular limiting structure forms a limit at the rear side of the limiting member 310 to prevent the moving member 410 from continuing to move forward, thereby restricting the opening angle of the clamping arm 100. When the limiting portion 427 is provided, an additional angular limiting structure may not be provided. The limiting portion 427 is directly provided on the rocker arm 420 and can be integrally formed, with a simple structure, and at the same time, the structure of the entire clamping device can also be simplified.

[0085] Please refer to Figure 4 and 7 , In one embodiment, the two rocker arms 420 and the moving member 410 are respectively connected through their respective rotating shafts 4111, and the rotation axes of the two rocker arms 420 and the moving member 410 are separated and parallel. In other embodiments, the two rocker arms 420 can also be connected to the moving member 410 through a common rotating shaft 4111.

[0086] Further, please refer to Figure 10 , In one embodiment, a pair of support arms 300 are relatively arranged at the notch between the two clamping arms 100, and both ends of the limiting member 310 are respectively fixedly connected to a support arm 300, for example, by laser or other forms of clamping, welding, bonding, screw locking, riveting or other fixing forms to form a stable limiting structure.

[0087] Further, the function of the moving member 410 is to be able to move within the clamping structure 1 and drive the rocker arm 420 to move. The movement of the moving member 410 relative to the clamping structure 1 can be, but is not limited to, sliding, rolling, etc. The moving member 410 can adopt any shape and structure that meets the above requirements.

[0088] Please refer to Figure 8 , 9 and 11, In one embodiment, the moving member 410 is a slider, and the moving member 410 is slidably arranged within the clamping structure 1. The moving member 410 includes a first seat body 411 and a second seat body 412. The rocker arm 420 is connected and restricted between the first seat body 411 and the second seat body 412, and the first seat body 411 and the second seat body 412 are spliced to form the moving member 410. In this structure, the moving member 410 is divided into the first seat body 411 and the second seat body 412 and manufactured separately, which can reduce the manufacturing difficulty. This assembled structure can first install the rocker arm 420 on the first seat body 411, and then fasten the second seat body 412 to the first seat body 411, thus completing the assembly of the moving member 410 and the installation of the rocker arm 420.

[0089] Please refer to Figure 11, in one embodiment, the first base body 411 has a rotating shaft 4111, and the rocker arm 420 is sleeved on the rotating shaft 4111. The second base body 412 can be buckled on the first base body 411. In order to be buckled with the second base body 412, a protrusion 4112 is provided on the first base body 411, and a recess 4121 is provided on the second base body 412. The protrusion 4112 and the recess 4121 are inserted and matched to form a lateral positioning.

[0090] Of course, in other embodiments, the moving member 410 can also be of other structures, for example, it can be an integrally formed structure or assembled by three or more sub-components, and the rocker arm 420 is installed on the moving member 410 by other means.

[0091] In some embodiments, the moving member 410 can be processed by laser cutting of steel pipes or formed by powder metallurgy (the assembly is simpler).

[0092] Further, in one embodiment, in order to prevent the moving member 410 from rotating within the clamping structure 1, at least one support arm 300 has a limiting and guiding portion provided along its longitudinal direction, and the moving member 410 has at least one limiting and guiding cooperation portion. The limiting and guiding cooperation portion cooperates with the limiting and guiding portion to limit the movement of the moving member 410 along the direction defined by the limiting and guiding portion.

[0093] Among them, in one embodiment, one of the limiting and guiding portion and the limiting and guiding cooperation portion is a guide groove, and the other is a guiding block provided with a protrusion, and the guiding block extends into the guide groove. For example, please refer to Figure 6 and 8 , in one embodiment, the guiding block 4113 is provided on the moving member 410, specifically on the outer wall of the first base body 411. The guide groove 320 is provided on the support arm 300 corresponding to the first base body 411. Of course, when guiding is required on both sides, a guiding block 4113 can also be provided on the second base body 412, and a guide groove 320 can also be provided on the other support arm 300 corresponding to the second base body 412.

[0094] In some embodiments, both support arms 300 can be provided with elastic buckles 330. When a certain support arm 300 is provided with the above-mentioned limiting and guiding portion, please refer to Figure 14, In one embodiment, one support arm 300 may have an elastic buckle 330, and the other support arm 300 may have a limiting and guiding portion (such as a guide groove 320) arranged along its longitudinal direction. The limiting and guiding portion is used to limit the longitudinal movement of the moving member 410 along the clamping structure 1. In this embodiment, the locking condition of the elastic buckle 330 is more single, and the locking is more reliable. If there are two elastic buckles 330, not only does it occupy space, but also it is more demanding for the manufacturing and assembly accuracy of parts to accurately align the two elastic buckles 330 with the clamping platform 4122 and lock them. At the same time, the limiting and guiding effect of the limiting and guiding portion on the other side can make the radial swing range of the elastic buckle 330 and the clamping platform 4122 of the moving member 410 smaller, thus ensuring a more stable locking.

[0095] Further, please refer to Figure 2-7 , In one embodiment, the bendable portion 120 is a semi-cylindrical structure. When the clamping arm 100 is closed, the bendable portion 120 can enclose a cylindrical structure. The semi-cylindrical shape refers to a non-complete cylindrical shape, not necessarily half of the cylindrical structure, and can also be one-third or other sizes of the entire cylindrical structure. In addition, in other embodiments, the bendable portion 120 can also be other structures, such as a sheet shape, etc., and is not limited to the semi-cylindrical structure.

[0096] Further, please refer to Figure 1-7 and Figure 19 , In one embodiment, the bendable portion 120 includes a plurality of first shrinkage seam groups 121 and second shrinkage seam groups 122. Each first shrinkage seam group 121 has at least one first shrinkage seam 1211, and each second shrinkage seam group 122 has at least one second shrinkage seam 1221. The first shrinkage seam 1211 and the second shrinkage seam 1221 extend along the circumferential direction of the bendable portion 120. The first shrinkage seam groups 121 and the second shrinkage seam groups 122 are arranged at intervals along the longitudinal direction of the clamping arm 100, and there is one first shrinkage seam group 121 between two second shrinkage seam groups 122. Among them, the overlapping area between the first shrinkage seam 1211 and the second shrinkage seam 1221 forms a twisted deformation section 124, so that the bendable portion 120 can be bent and twisted.

[0097] In one embodiment, as Figure 5 and 19 shown, the clamping structure 1 remains in the clamping state in the initial state, the first shrinkage seams 1211 remain in the initial state, and each part of the bendable portion 120 does not deform. As Figure 2 and 19As shown, when it is necessary to open the clamping structure 1, the bendable portion 120 deforms outward, the first shrinkage seam 1211 and the second shrinkage seam 1221 shrink, and the twisted deformation section 124 undergoes bending and twisting deformation, so that the outer side of the bendable portion 120 (the side where the clamping arms 100 face away from each other) shrinks, causing the entire clamping head 110 to open.

[0098] In one embodiment, the first shrinkage seam group 121 and the second shrinkage seam group 122 can be integrally formed by laser cutting on a pipe or sheet. For example, it is laser cut from a pipe or sheet with a wall thickness of 2 mm

[0099] Among them, please refer to Figure 19 , in one embodiment, two second shrinkage seams 1221 are arranged between adjacent first shrinkage seam groups 121. The two second shrinkage seams 1221 are respectively arranged on both sides of the bendable portion 120, and the second shrinkage seam 1221 extends outwardly and penetrates to the corresponding side edge on the bendable portion 120.

[0100] Among them, in the longitudinal direction of the bendable portion 120, within the same distance, the more densely the twisted deformation sections 124 are distributed, the softer the bending deformation of the bendable portion 120 is. At the same time, in order to take into account the strength of the bendable portion 120, in one embodiment, the number of the first shrinkage seam groups 121 is 6 - 10, and the second shrinkage seam groups 122 are distributed at both ends of the bendable portion 120. Therefore, the number of the second shrinkage seam groups 122 is one more than that of the first shrinkage seam groups 121, and the number range is 7 - 11. In this quantity, the bendable portion 120 can be easily bent and the strength can be ensured, avoiding the bendable portion 120 being too soft to support the clamping head 110. When the operator normally opens and closes the clamping structure 1, only a very small force is required to achieve opening and closing, and the feel is good. As Figure 19 shown, in the embodiment shown in the figure, the number of the second shrinkage seam groups 122 is 8, and the number of the first shrinkage seam groups 121 is 7. By adjusting the circumferential length of the first shrinkage seam 1211 and the second shrinkage seam 1221 and the distance between them, the softness or supportability of the bending can also be changed, and the circumferential length and the distance can be flexibly set according to requirements.

[0101] Furthermore, please refer to Figure 20 , after the clamping arm 100 clamps the target tissue 2, the moving member 410 needs to move to a predetermined locking position with the clamping arm 100 to be locked, that is, the clamping platform 4122 needs to move to the position corresponding to the elastic buckle 330 to achieve locking. However, in actual use, when the hardness or thickness of the human tissue clamped by the clamping structure 1 is different (such as Figure 20As shown, it will limit the closing angle of the clamping structure 1. Since the closing angle is related to the stroke of the moving part 410, at this time, the moving part 410 cannot move to the locking position, and the clamping arm 100 cannot be maintained in the clamping state.

[0102] Regarding this problem, please refer to Figure 19-20 , the bendable part 120 has an annular deformation part 123. When the clamping arm 100 is in the clamping state, if a relatively large target tissue 2 is clamped, it is difficult for the clamping arm 100, the moving part 410, and the rocker arm 420 to move to a position where self-locking with the limiting part 310 and locking with the locking cooperation part can be achieved. When a greater pulling force is continuously applied to the transmission part 510, it will cause the deformation part 123 to be able to squeeze and deform inward, so as to drive the clamping arm 100, the moving part 410, and the rocker arm 420 as a whole to move relative to the support part and the limiting part 310 towards the rear end of the insertable tissue clamping device, thereby realizing the self-locking of the rocker arm 420 with the limiting part 310 and the locking of the moving part 410 with the locking cooperation part. There is a gap between the deformation part 123 and the support arm 300 to form a clearance area on the outer periphery of the deformation part 123, which is more convenient for generating deformation.

[0103] Please refer to Figure 19 , in one embodiment, the deformation part 123 is an elliptical structure.

[0104] The above embodiment shows a structure in which the bendable part 120 realizes bending deformation by opening the first shrinkage seam group 121, the second shrinkage seam group 122, and the twisted deformation section 124. The structure of the bendable part 120 in this embodiment is not limited to this, and it can also be realized by other means.

[0105] For example, in one embodiment, in the clamping arm 100, the thickness of the bendable part 120 can also be set to be thinner than other parts, for example, thinner than the clamping head 110 and the connecting part 140, so that when the moving part 410 drives the clamping arm 100 to move, the bendable part 120 can be preferentially bent and deformed.

[0106] In one embodiment, in the clamping arm 100, the bendable part 120 can have a material and structure that are more easily bent and deformed, such as a material that is more easily bent and deformed than the clamping head 110 and the connecting part 140, such as a metal material, a plastic material, or a metal wire braided mesh with good bending performance, so that when the moving part 410 drives the clamping arm 100 to move, the bendable part 120 can be preferentially bent and deformed. Of course, the bendable part 120 can also adopt other structures with good bending deformation performance, such as a metal braided structure.

[0107] Further, the first stroke, the second stroke, and the third stroke are three parts of the entire movement stroke of the transmission member 510. These three strokes can be in the same direction, or at least two of them can be in different directions. Each stroke can be completely separated and have no connection at all, or at least two of the strokes can be continuous or overlapping. For example, the third stroke can be closely connected after the second stroke. Of course, the second stroke and the third stroke can also be two separated and non - continuous parts.

[0108] As an example, please refer to Figure 2-4 , at this time, the transmission member 510 is in the first stroke. At this time, the transmission member 510 moves forward along its axis away from the control handle 3, driving the clamping arms 100 to open outwards, so that the clamping arms 100 move to the open state.

[0109] Please refer to Figure 5-7 , at this time, the transmission member 510 is in the second stroke. The transmission member 510 moves backward along its axis close to the control handle 3. The transmission member 510 can drive the clamping arms 100 to move closer to each other inward, so that the clamping arms 100 move to the clamping state.

[0110] Please refer to Figure 13-18 and Figure 21-26 , at this time, the transmission member 510 is in the third stroke. When the transmission member 510 moves along its axis close to the control handle 3 and away from the clamping arms 100, the third stroke is in the same direction as the second stroke and is closely connected. That is, when the clamping arms 100 move to the clamping state, the transmission member 510 switches from the second stroke to the third stroke. Among them, the third stroke can be further divided into multiple sub - strokes, and these sub - strokes include a locking stroke, an inner detachment stroke, and an outer detachment stroke.

[0111] Please refer to Figure 16-18 , when the transmission member 510 switches to the third stroke until it moves to the illustrated position, at this time the clamping arms 100 are locked and the transmission member 510 cannot move in the reverse direction to open the clamping arms 100 again. The movement stroke of the transmission member 510 during this process is the locking stroke.

[0112] Please refer to Figure 21-23 , after the transmission member 510 completes the locking stroke, it enters the inner detachment stroke. When the transmission member 510 moves to the illustrated position, at this time the clamping arms 100 are separated from the transmission member 510, and the transmission member 510 can no longer drive the clamping arms 100 to move, losing control of the clamping arms 100, and the clamping arms 100 are held in the locked state. The movement stroke of the transmission member 510 during this process is the inner detachment stroke.

[0113] Please refer to Figure 24-26After the transmission member 510 completes the inner disengagement stroke, it enters the outer disengagement stroke. When the transmission member 510 moves to the position shown in the figure, the clamping arm 100 and the separation base 200 are separated, and the clamping arm 100 is left on the target tissue 2 it clamps. The separation base 200 and the transmission member 510 can be withdrawn from the patient's body. In this process, the movement stroke of the transmission member 510 is the outer disengagement stroke.

[0114] certainly, Figure 13-18 as well as Figure 21-26 In one embodiment of the third stroke, the transmission member 510 is in the third stroke, the clamping arm 100 is separated from the transmission member 510, and the separation base 200 and the clamping arm 100 can be separated at the same time, or one action can be performed before the other. In other embodiments, the locking stroke, the inner disengagement stroke and the outer disengagement stroke can also be performed in an overlapping manner, for example, the inner disengagement stroke and the outer disengagement stroke overlap, and the inner disengagement and the outer disengagement are performed synchronously.

[0115] For further information, please refer to Figure 2-7 In one embodiment, the clamping arm 100 includes a connecting portion 140, which is disposed at the rear side of the bendable portion 120. The connecting portion 140, the bendable portion 120, the clamping head 110 and the support arm 300 are an integrally formed structure. The connecting portion 140 is used to connect the bendable portion 120, the clamping head 110 and the support arm 300 as a whole to the separation base 200. The separation base 200 and the connecting portion 140 may be integrally formed or may be manufactured separately and then fixedly connected.

[0116] In order to achieve external separation, in one embodiment, please refer to Figure 2 , 24 -26, the separation base 200 is rotatably connected to the sleeve assembly 520, so that the clamping structure 1 can rotate as a whole relative to the sleeve assembly 520, and the clamping arm 100 and the support arm 300 are connected to the separation base 200 as a whole through the first tear portion 210. In this embodiment, the separation base 200 and other parts of the clamping structure 1 are an integrally formed structure, and the two are connected as a whole through the first tear portion 210. In addition, the separation base 200 and other parts of the clamping structure 1 can also be connected as a whole by means of clamping or the like.

[0117] In one embodiment, please refer to Figure 24-26 The separation base 200 has a follower 220, which is used to receive external force to drive the separation base 200 to break from the first tearing portion 210 and other parts of the clamping structure 1. For example, the external force applied by the operator can be transmitted to the first tearing portion 210 through the moving member 410 or other components.

[0118] Please continue to refer to Figure 24-26, in one embodiment, the follower 220 is driven to move by the moving member 410. Specifically, the follower 220 is located on the moving trajectory of the moving member 410. When the moving member 410 moves to the position of the follower 220, it can drive the follower 220 to move towards the control handle 3 together. Thus, under the action of the moving member 410, the separation base 200 and the connecting portion 140 are broken at the first tearing portion 210.

[0119] Specifically, please refer to Figure 24-26 , a limiting groove 513 axially opened may be further provided on the moving member 410, and the follower 220 is placed at the bottom of the limiting groove 513. As the moving member 410 moves towards the control handle 3, when the moving member 410 enters the outer separation stroke, the top of the limiting groove 513 moves to the position of the follower 220, thereby starting to drive the follower 220 and the suspension portion 240 to move towards the control handle 3, and further promoting the separation of the separation base 200 and the connecting portion 140.

[0120] As a more specific embodiment, please refer to Figure 24-26 , the follower 220 is a limiting shaft, and the limiting shaft is placed in the limiting groove 513. Please refer to Figure 3 , when the limiting groove 513 moves forward to the position of the follower 220, the follower 220 blocks the transmission member 510, thereby limiting the forward movement of the moving member 410 and the opening stroke of the clamping member 1.

[0121] The above uses specific examples to elaborate on 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 pertains, based on the idea of the present invention, several simple deductions, deformations or substitutions can also be made.

Claims

1. An insertable tissue clamping device, characterized in that, Comprising: A clamping structure, which includes at least two clamping arms for clamping a target tissue; And a motion control component, which includes a moving member arranged in the clamping structure in a manner capable of moving axially along the clamping structure, and the moving member is connected to the clamping arms to drive the clamping arms to open and close; The clamping structure has a locking and mating portion, and the moving member has a locking portion for locking with the locking and mating portion when the clamping arms clamp the target tissue to prevent the clamping arms from opening; The locking portion is a clamping platform provided on the moving member. The clamping structure includes a support arm located between the clamping arms, and the clamping arms and the support arm enclose a cylindrical structure. The locking and mating portion is an elastic snap formed by inwardly protruding from a partial area of the support arm, and the elastic snap and the support arm are an integrally formed structure; the elastic snap is arranged on the path of the clamping platform moving backward, and the elastic snap can abut against the front side of the clamping platform when the clamping arms are separated to prevent the clamping platform from moving toward the front end of the clamping structure.

2. The plug-in tissue clamping device according to claim 1, wherein The clamping arms include clamping heads and bendable portions, and the clamping heads and the bendable portions are relatively fixed. The bendable portions have a bending structure capable of bending in the closing direction of the clamping arms and / or bending in the opening direction of the clamping arms.

3. The plug-in tissue clamping device according to claim 1, wherein The elastic snap is arranged longitudinally along the support arm.

4. The plug-in tissue clamping device according to claim 1, wherein At least one of the support arms has a limiting and guiding portion arranged longitudinally along it, and the moving member has at least one limiting and guiding mating portion, and the limiting and guiding mating portion cooperates with the limiting and guiding portion to limit the movement of the moving member along the direction defined by the limiting and guiding portion.

5. The plug-in tissue clamping device according to claim 4, wherein, There are at least a pair of oppositely arranged support arms, where one of the support arms has the locking and mating portion and the other support arm has the limiting and guiding portion.

6. The plug-in tissue clamping device according to claim 4, wherein, One of the limiting and guiding portion and the limiting and guiding mating portion is a guide groove, and the other is a protruding guide block inserted into the guide groove.

7. The plug-in tissue clamping device according to claim 4, wherein The support arms are relatively arranged at the gap between the two clamping arms.

8. The plug-in tissue clamping device according to claim 2, characterized in that, The bendable portion has at least one annular deformation portion. When the clamping arms are in the clamping state, the deformation portion can be squeezed and deformed inward to drive the whole clamping arms to move toward the rear end of the insertable tissue clamping device.

9. The plug-in tissue clamping device according to claim 8, wherein, The deformation portion has a front arch protruding toward the front end of the deformation portion and a rear arch protruding toward the rear end of the deformation portion, and the front arch and the rear arch can be squeezed and deformed inward when subjected to sufficient external force.

10. The plug-in tissue clamping device according to claim 8, wherein, The bendable portion includes several first shrinkage seam groups and second shrinkage seam groups. Each first shrinkage seam group has at least one first shrinkage seam, and each second shrinkage seam group has at least one second shrinkage seam. The first shrinkage seam and the second shrinkage seam extend circumferentially along the bendable portion; the first shrinkage seam groups and the second shrinkage seam groups are arranged at intervals longitudinally along the clamping arms; the overlapping area between the first shrinkage seam and the second shrinkage seam forms a twisted deformation section to enable the bendable portion to bend and twist.

11. The plug-in tissue clamping device according to claim 10, characterized in that, The first shrinkage joint group and the second shrinkage joint group are arranged on the front side of the deformation part, and the twisted deformation section is connected to the front part of the deformation part.

12. The plug-in tissue clamping device according to claim 10, wherein, Two of the second shrinkage joints are arranged between adjacent ones of the first shrinkage joint groups, the two second shrinkage joints are respectively arranged on two sides of the bendable part, and the second shrinkage joints extend outwards and penetrate through to the corresponding side edges on the bendable part.

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