CN219397432U

CN219397432U - Insertion type tissue clamping device

Info

Publication number: CN219397432U
Application number: CN202222339112.2U
Authority: CN
Inventors: 黄俊俊; 单剑; 吴海良; 陈卿业; 孙忠利
Original assignee: Ningbo Xinwell Medical Technology Co Ltd
Current assignee: Ningbo Xinwell Medical Technology Co Ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2023-07-25
Anticipated expiration: 2032-08-31

Abstract

The limiting piece of the plug-in tissue clamping device is provided with two limiting blocks which are axially arranged along the limiting piece, and a limiting space is formed between the two limiting blocks. The clamping arms are directly or indirectly limited in the limiting space so as to avoid staggering between the clamping arms and ensure that the clamping arms cannot be meshed due to overlarge staggering distance.

Description

Insertion type tissue clamping device

Technical Field

The present application relates to the field of medical devices, and in particular to a structure of an insertion type tissue clamping device for surgery.

Background

The inserted tissue clamping device is an inserted medical apparatus and is used for clamping tissues in a human body or an animal body so as to play a role in stopping bleeding or closing, and comprises a hemostatic clamp, a tissue clamp and the like.

For example, during minimally invasive treatment of digestive tract disorders, the tissue occluding device is typically placed through the instrument channel of the endoscope for therapeutic purposes. Hemostatic clips (or tissue clips) have been widely used, for example, to provide hemostasis or closure at gastrointestinal bleeding or trauma sites.

However, the clamping arms of the prior clamping device are easy to have the problem of malocclusion during the opening and closing process, and finally lead to ineffective occlusion

Disclosure of Invention

The application provides a plug-in tissue clamping device to demonstrate a structure that can improve clamping arm bite accuracy.

In view of the foregoing, one embodiment of the present application provides an insertion-type tissue clamping device, comprising:

the clamping structure is provided with at least two clamping arms and a limiting piece, wherein the clamping arms are used for clamping target tissues, and the limiting piece is arranged between the two opposite clamping arms;

the limiting piece is provided with two limiting blocks axially arranged along the limiting piece, a limiting space is formed between the two limiting blocks, and the clamping arms are directly or indirectly limited in the limiting space so as to avoid staggering between the clamping arms.

In one embodiment, the device further comprises a moving piece and at least two rocker arms, wherein the clamping structure defines a moving space axially arranged along the clamping structure, the moving piece is arranged in the moving space, and the moving piece is used for being linked with the control handle so as to reciprocate in the moving space; one end of the rocker arm is hinged to the moving piece, and the other end of the rocker arm is connected with a corresponding clamping arm respectively so as to drive the clamping arm to open and close;

The two rocker arms are arranged at the limiting space along the axial direction of the limiting piece so as to prevent the two rocker arms from separating along the axial direction of the limiting piece.

In one embodiment, the limiting member has a shaft-shaped structure, and the two limiting members are distributed on the limiting member in a dumbbell shape.

In one embodiment, the two rocker arms are distributed in a cross shape, and the limiting piece is located in a cross area formed by the two rocker arms and close to the moving piece, so that when the moving piece moves towards the rear end, the limiting piece can contact at least one rocker arm and form a fulcrum of a lever structure for the at least one rocker arm.

In one embodiment, when the clamping arm moves in the clamping state, the arm of force of the rotation center of the rocker arm relative to the moving member, which is away from the center of the limiting member, is greater than the arm of force of the connection center of the rocker arm and the clamping arm, which is away from the center of the limiting member.

In one embodiment, the two rocker arms have locking mating surfaces, when the clamping arms are in the clamping state, the locking mating surfaces of the two rocker arms enclose a locking groove, and the limiting piece is located in the locking groove to prevent the two clamping arms from transversely and crosswise moving, so that the clamping arms are kept in the clamping state.

In one embodiment, the two rocker arms are provided with guide surfaces, when the clamping arms move from the open state to the clamping state, the guide surfaces enclose a guide space, the limiting piece is arranged in the guide space, and the guide space is communicated with the locking groove so as to guide the locking groove to be clamped on the limiting piece when the rocker arms drive the clamping arms to move to the clamping state.

In one embodiment, the rocker arm has a guide surface and an arc locking mating surface, the locking mating surface is located at the front side of the guide surface, and when the clamping arm is in the clamping state, the two locking mating surfaces of the rocker arm enclose an arc locking groove.

In one embodiment, two rocker arms are connected to one end of the moving part, and are provided with limiting parts protruding, when the clamping arms are in an open state, the limiting parts form limiting structures, the limiting structures form limiting at the rear side of the limiting part, so that the moving part is prevented from continuing to move towards the front end, and the opening angle of the clamping arms is limited.

In one embodiment, the clamping structure includes a pair of support arms, the support arms and the clamping arms are integrally formed or fixedly connected, the pair of support arms are oppositely arranged at a notch between the two clamping arms, and two ends of the limiting piece are respectively and fixedly connected with one support arm.

In one embodiment, the clamping arm includes a clamping head for clamping a target tissue and a bendable portion having a structure capable of bending in a closing direction of the clamping arm and/or bending in an opening direction of the clamping arm, the clamping head and the bendable portion being held relatively fixed.

In one embodiment, the clamping structure further comprises a sleeve, one end of the clamping arm is arranged in the sleeve, the other end of the clamping arm extends out of the sleeve, the moving part is at least partially positioned in the sleeve and can reciprocate along the axial direction of the sleeve, and the limiting part is fixedly arranged on the sleeve.

According to the insertion type tissue clamping device of the embodiment, the limiting piece is provided with two limiting blocks arranged along the axial direction of the limiting piece, and a limiting space is formed between the two limiting blocks. The clamping arm is directly or indirectly limited in the limiting space, so that the clamping arm cannot be engaged due to overlarge staggered distance.

Drawings

FIG. 1 is a schematic illustration of an embodiment of an insertion type tissue clamping device, wherein the transmission assembly is omitted;

FIG. 2 is a schematic view of a clamp arm in an open position according to one embodiment of the present disclosure;

FIGS. 3 and 4 are cross-sectional views of an embodiment of the present application with the clamp in an open position, with the drive member in a first stroke, with the direction of movement of the drive member indicated by the arrow;

FIG. 5 is a schematic view of a clamping arm in a clamped state according to an embodiment of the present disclosure;

FIGS. 6 and 7 are cross-sectional views of one embodiment of the present application with the clamping member in a clamped condition, wherein the driving member is in a second stroke, the direction of movement of the driving member being indicated by the arrow;

FIG. 8 is an exploded view of the front end components of one embodiment of the present application;

FIG. 9 is a schematic diagram illustrating a configuration of a rocker arm and a limiting member according to an embodiment of the present disclosure;

FIG. 10 is a schematic view illustrating a fitting structure of a limiting member and a supporting arm according to an embodiment of the present disclosure;

FIG. 11 is an exploded view of the engagement structure of the rocker arm and the moving member in one embodiment of the present application;

FIG. 12 is a schematic view of a rocker arm structure according to one embodiment of the present disclosure;

FIG. 13 is a schematic view of a structure of a clamping arm in a clamping and self-locking state according to an embodiment of the present application, in which a driving member is in a third stroke, and a movement direction of the driving member is shown by an arrow;

FIGS. 14 and 15 are cross-sectional views of a clamp arm in a clamped and self-locking state in one embodiment of the present application;

FIG. 16 is a schematic view of a clamping arm in a clamped and locked state according to one embodiment of the present disclosure;

FIGS. 17 and 18 are cross-sectional views of one embodiment of the present application with the clamping arms in a clamped and locked condition, wherein the driving member is in a third stroke, the direction of movement of the driving member being indicated by the arrow;

FIG. 19 is a schematic view of a tubular clamping member according to one embodiment of the present disclosure after being deployed in a longitudinal direction;

FIG. 20 is a schematic view of the deformation direction of the deformation portion when the clamping member clamps thicker tissue according to one embodiment of the present application, the deformation direction being shown by the arrow;

FIG. 21 is a schematic view of a structure of a moving member and a driving member after the moving member is separated from each other, wherein the clamping arm is in a clamping state according to an embodiment of the present disclosure;

FIG. 22 is a cross-sectional view of an embodiment of the present invention showing the gripping arms in a gripping position with the moving member separated from the driving member, wherein the driving member is in a third stroke and the direction of movement of the driving member is shown by the arrow;

FIG. 23 is a schematic cross-sectional view of the separation process of the moving member from the driving member in one embodiment of the present application;

FIGS. 24 and 25 are schematic views showing the structure of the clamping arm in the clamping state, with the base and the clamping arm separated from the support arm;

Fig. 26 is a cross-sectional view of the clamping arm in the clamping state, the separation base, the clamping arm and the support arm after being separated, and the transmission member is in the third stroke, and the movement direction of the transmission member is shown by an arrow.

Detailed Description

The utility model will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, some operations associated with the present application have not been shown or described in the specification to avoid obscuring the core portions of the present application, and may not be necessary for a person skilled in the art to describe in detail the relevant operations based on the description herein and the general knowledge of one skilled in the art.

Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated.

The present embodiments provide an insertion type tissue clamping device (hereinafter referred to as a clamping device for convenience of description) for clamping tissue in a human or animal body (collectively referred to as target tissue) to perform a hemostatic or occlusive function, which may include, but is not limited to, hemostatic clips, tissue clips, and the like. The clamping device can be a disposable instrument or a reusable instrument.

Referring to fig. 1-7, in one embodiment, the clamping device includes a clamping structure 1, a control handle 3, a motion control assembly 4, and a transmission assembly 5.

The control handle 3 is an operation member for controlling the pinching device, and an operator can manually operate opening and closing of the pinching structure 1 through the control handle 3 to pinch the target tissue 2. For convenience of description, the end of the clamping structure 1 in the whole clamping device is defined as a front end, the end of the control handle 3 is defined as a rear end, and the front-rear directions of other components are all based on the front-rear directions.

The clamping structure 1 is a structure for grasping target tissue, and has at least two clamping arms 100, wherein the clamping arms 100 clamp the target tissue under the driving of the motion control assembly 4. The motion control assembly 4 functions to drive the clamp arm 100 in both the opening and closing directions.

To prevent the clamping arms 100 from being misaligned too much to be effectively engaged when engaged, referring to fig. 8-10, in some embodiments, the clamping structure 1 further includes a stop 310. The limiting member 310 has two limiting blocks 311 disposed along an axial direction thereof, and a limiting space is formed between the two limiting blocks 311. The clamping arm 100 is directly or indirectly limited in the limiting space, so as to ensure that the clamping arm 100 cannot be engaged due to the overlarge staggered distance.

The clamping arm 100 may be directly limited in the limiting space, i.e. the limiting member 310 directly limits the clamping arm. For example, when the clamping structure 1 adopts a structure of clamping arms and sleeves, the clamping arms can be closed and opened by moving inwards or outwards of the sleeves, and the specific structure can refer to the existing hemostatic clamp structure, in this case, in some embodiments, a fixed limiting member 310 can be arranged on the path of the clamping arms moving relative to the sleeves, and two or more clamping arms are directly located in the limiting space of the limiting member 310, so as to ensure that the clamping arms cannot be separated along the axial direction of the limiting member 310. In other embodiments, two or more clamping arms may be connected to the limiting space of the limiting member 310, and the clamping arms are driven to move toward the inside or the outside of the sleeve by driving the limiting member 310, so that the clamping arms and the limiting member 310 remain connected during the whole movement.

In other embodiments, the clamping arm 100 may be indirectly limited in the limiting space, i.e., the limiting member does not directly limit the clamping arm, but rather indirectly limits the clamping arm 100 by limiting other structures connected to the clamping arm (such as a rocker arm 420 or the like for connecting the clamping arm 100 and the moving member 410).

Referring to fig. 2-7 and 11-12, the motion control assembly 4 includes a motion member 410 and at least two rocker arms 420. The moving member 410 is disposed in the clamping structure 1 in a manner of being capable of moving along the axial direction of the clamping structure 1, one ends of the two rocker arms 420 are hinged to the moving member 410, and the other ends of the two rocker arms are respectively connected with one clamping arm 100, for example, by means of laser or other fastening manners such as clamping, welding, bonding, screw locking, riveting and the like. For example, referring to fig. 2-8, in one embodiment, the front end of the rocker arm 420 has a protruding connection portion 421, and the protruding connection portion 421 is inserted into the corresponding clamping arm 100 and fixedly connected to the clamping arm 100, for example, by ultrasonic welding.

Referring to fig. 1-7, in one embodiment, the clamping structure 1 defines a movement space along an axial direction thereof, the moving member 410 is disposed in the movement space, the moving member 410 is used for being linked with the control handle 4, and the moving member 410 reciprocates in the movement space under the control of the control handle 1.

When the moving member 410 moves toward the front end of the clamping structure 1, the swing arm 420 expands the clamping arm 100 to bring the clamping arm 100 into an expanded state; when the moving member 410 moves toward the rear end of the clamping structure 1, the swing arm 420 pulls the clamping arm 100 to close, so that the clamping arm 100 is in a clamped state.

To prevent the rocker arm 420 from shifting during movement, resulting in the clamp arm 100 coupled to the rocker arm 420 not moving in the intended direction, resulting in inaccurate engagement positions between the clamp arms 100 and failure to successfully engage the target tissue. In contrast, referring to fig. 2-7, in one embodiment, two rocker arms 420 are stacked in the axial direction of the limiting member 310 at the limiting space to prevent the two rocker arms 420 from disengaging along the axial direction of the limiting member 310, and limit the rocker arms 420 from sliding, shaking and disengaging to the outer sides of the two ends, so as to prevent the teeth of the clamping arm 100 from being not aligned accurately, and thus ensure that the clamping arm 100 can be engaged accurately.

Referring to fig. 2-10, in some embodiments, the clamping structure 1 further includes a pair of support arms 300 disposed between the two clamping arms 100, and the support arms 300 are connected to the clamping arms 100. The connection can be realized by an integrally formed structure (such as the embodiment shown in fig. 2-7), and can be connected into a whole by fastening means such as clamping, welding, bonding, screw locking, riveting and the like. The pair of support arms 300 are provided with stoppers 310.

In one embodiment, the clamping arm 100 may be integrally fixed, and one end of two rocker arms 420 are hinged to the moving member 410, and the other end is connected to a corresponding clamping arm 100.

For example, referring to fig. 1-7, the clamping arm 100 includes a clamping head 110 and a bendable portion 120, wherein the clamping head 110 is used for clamping the target tissue 2, and the bendable portion 120 is utilized to perform opening and closing under the driving of the moving member 410 and the rocker 420. The clamping head 110 and the bendable portion 120 remain relatively fixed. The relative fixation can be realized by an integrally formed structure (such as the embodiment shown in fig. 2-7), and can be connected into a whole by fastening means such as clamping, welding, bonding, screw locking, riveting and the like. The integral forming structure can be formed by integrally processing the target object by the same material, and is not formed by combining and assembling more than two parts. The integrally formed structures (including other integrally formed structures described below) may be formed by, but are not limited to, injection molding, laser cutting, and other machining processes. In particular, when laser cutting is adopted, processing of a very small gap can be realized, which is beneficial to miniaturization of the whole structure and improvement of the compactness of the structure.

In addition, the clamping structure 1 may also adopt the existing structure, for example, further comprises a sleeve, the inner cavity of the sleeve is a movement space, one end of the clamping arm is arranged in the sleeve, the other end of the clamping arm extends out of the sleeve, and the moving member 410 is at least partially arranged in the sleeve and can reciprocate along the axial direction of the sleeve. The clamping is opened and closed by axial movement of the mover 410 within the sleeve via the rocker arm 420. The clamping arm may now not have a bendable portion 120, only one clamping head for its clamping function. At this time, the limiting member 310 may be fixedly disposed on the sleeve in the radial direction.

Further, referring to fig. 1-7, in one embodiment, two rocker arms 420 are arranged in a cross-like configuration. The cross-shaped distribution of rocker arms 420 converts the axial reciprocation of the mover 410 into the opening and closing movements of the clamping arms 100 for the purpose of clamping the target tissue. The cross rocker arm is simple in structure and more stable in force transmission between the moving member 410 and the clamp arm 100.

Of course, in other embodiments, the two rocker arms 420 may have other configurations that are non-intersecting, such as being inverted splayed or I-shaped, between the mover 410 and the clamping arm 100.

Further, the transmission assembly 5 includes a transmission 510 and a sleeve assembly 520. The transmission member 510 is connected to the movement 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 movement member 410.

Referring to fig. 1, in one embodiment, the control handle 3 may include a control portion 31 for controlling the transmission member 510 and a grip portion 32 for being gripped by an operator, and the control portion 31 may be movable relative to the grip portion 32. In fig. 1, the grip portion 32 is configured to allow the thumb of the operator to be inserted, and the control portion 31 is movable back and forth with respect to the grip portion 32. The control portion 31 may be connected to the transmission member 510 through a traction member to form a linkage structure. The traction member may be, but is not limited to, a wire rope or other traction rope of other materials, and other components that may be used as a traction structure for the clamping device. With this traction member, the operator can drive the transmission member 510 and the movement member 410 to move through the control portion 32, thereby controlling the opening and closing of the clamp arm 100.

Further, referring to fig. 1-7, in one embodiment, the clamping structure 1 further includes a separation base 200 connected to the clamping arm 100. The connection may be a one-piece structure (as in the embodiment of fig. 2-7) that is formed by integrally forming the target object from the same material, rather than by assembling two or more parts. The integrally formed structures (including other integrally formed structures described below) may be formed by, but are not limited to, injection molding, laser cutting, and other machining processes. In particular, when laser cutting is adopted, processing of a very small gap can be realized, which is beneficial to miniaturization of the whole structure and improvement of the compactness of the structure. The clamping arm 100 and the separation base 200 may be integrally connected to each other by fastening means such as clamping, welding, adhesive bonding, screw locking, or caulking.

Wherein, different motion strokes of the transmission member 510 correspond to different states of the clamping device. Specifically, the transmission 510 has a first stroke, a second stroke, and a third stroke. In the first stroke, the driving member 510 drives the clamping heads 110 away from each other, so that the clamping arms 100 move to an open state, as shown in fig. 2-4; in the second stroke, the driving member 510 drives the clamping heads 110 to approach each other, and the clamping arms 100 move to a clamping state to clamp the target tissue 2, as shown in fig. 5-7; in the third stroke, the clamping arm 100 is locked in the clamped state, and the clamping arm 100 is separated from the transmission member 510 and the separation base 200, as shown in fig. 13 to 18. When the clamping arm 100 is completely separated from the transmission member 510 and the separation base 200, the clamping arm 100 may remain in the patient, and the portion separated from the clamping arm 100 may be removed from the patient. The above process is a general description of the overall use of the clipping device.

When the clamping arm 100 clamps the target tissue 2, the target tissue 2 has a reverse force to the clamping arm 100, so that in order to firmly clamp the target tissue 2, it is necessary to ensure that the clamping device can provide a sufficient biting force to the clamping arm 100. In response to this problem, as shown in FIG. 4, in one embodiment, the stop 310 is located in an intersection area 421 formed by the two rocker arms 420 and adjacent to the moving member 410. Referring to fig. 2 to 7, when the moving member 410 moves toward the rear end, the stopper 310 can contact the at least one swing arm 420 at least when the clamp arm 100 is in the clamped state, and form a fulcrum of the lever structure for the at least one swing arm 420.

Further, referring to fig. 10, in an embodiment, a pair of support arms 300 are oppositely disposed at the gap between the two clamping arms 100, and two ends of the limiting member 310 are fixedly connected with one support arm 300 respectively, for example, by clamping, welding, bonding, screw locking, riveting or other fixing forms by laser or other forms, so as to form a stable limiting structure.

In the embodiment shown in fig. 10, the limiting member 310 has a shaft-like structure, and two limiting members 311 are distributed on the limiting member 310 in a dumbbell shape. Of course, in other embodiments, the limiting member 310 may have other structures.

Further, in the embodiment shown in fig. 2-8, the rocker arm 420 serves as both a key component for connecting the clamp arm 100 to the mover 410 and a component for implementing a lever structure in cooperation with the stopper 310. To satisfy both of these functions, the outer edge of the rocker arm 420 facing the stopper 310 needs to be able to generate a force with the stopper 310. Because the front end of the rocker arm 420 is fixedly connected (e.g., welded) to the middle of the clamping arm 100, 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 a lever rotation fulcrum of the clamping arm 100. During the rearward movement of the moving member 410, the rearward displacement of the moving member 410 is converted into the closing of the clamping arm 100, and at this time, the outer edge of the rocker arm 420 near the side of the stopper 310 has both a relative sliding displacement and a relative rotational displacement with respect to the stopper 310. The pulling force from the control handle 3 is converted into the pressing force of the rocker arm 420 against the stopper 310, and the acting force can be effectively transmitted to the other end of the rocker arm 420 and then to the front end of the clamping arm 100 by the action of the stopper 310 serving as a fulcrum, thereby obtaining a larger clamping force (biting force).

In order to ensure that the lever structure formed by the limiting member 310 and the rocker arm 420 is a labor-saving lever at least when the clamping arm 100 is in the clamping state, in one embodiment, referring to fig. 7, at least when the clamping arm 100 is in the clamping state, the arm b of the rotation center of the rocker arm 420 relative to the moving member 410 is greater than the arm c of the connecting center of the rocker arm 420 and the clamping head 110 from the center of the limiting member 310. In this way, the operator can obtain a greater gripping force for the gripping arm 100 in a more labor-saving manner when the gripping arm 100 is in the gripping state.

Of course, in other embodiments, the arm b of the rotation center of the swing arm 420 relative to the moving member 410 from the center of the limiting member 310 may be equal to or less than the arm c of the connection center of the swing arm 420 and the clamping head 110 from the center of the limiting member 310 at least when the clamping arm 100 is in the clamping state. At this time, the direction of the force is changed mainly by the lever, so that the operator can more easily engage the clamping arm 100 with the target tissue 2 by pulling the transmission member 510.

Further, to avoid the reverse force of the target tissue 2 to prop open the clamping arm 100 after the clamping arm 100 engages the target tissue 2, a self-locking structure may be formed by combining the stopper 310 and the rocker arm 420 in one embodiment. Referring to fig. 12 and 15, in one embodiment, the two rocker arms 420 have locking mating surfaces 422, when the clamping arms 100 are in the clamped state, the locking mating surfaces 422 of the two rocker arms 420 enclose locking grooves 423, and the limiting member 310 is located in the locking grooves 423 to prevent the two clamping arms 100 from transversely crossing to keep the clamping arms 100 in the clamped state.

The self-locking principle is that when the clamping arm 100 is in a clamping state, the reverse acting force of the target tissue 2 to prop up the clamping arm 100 is converted into the transverse displacement of the rocker arm 420 relative to the limiting piece 310 through the rocker arm 420, the acting force on the forward end of the moving piece 410 becomes very small, and at the moment, the limiting piece 310 is positioned in the locking groove 423, so that the rocker arm 420 can be prevented from transversely moving in a crossing manner, and the tissue clamping arm 100 can be opened.

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, so that the limiting member 310 can enter the locking groove 423, and larger lateral movement of the clamping arm 100 caused by too much gap between the locking groove 423 and the limiting member 310 can be avoided, so that the clamping arm 100 is prevented from loosening the target tissue 2.

The stop 310 remains substantially stationary during rearward movement of the rocker arm 420, and thus a guide structure may also be provided in some embodiments in order to guide the locking groove 423 over the stop 310. Referring to fig. 7, 12 and 15, in one embodiment, two rocker arms 420 have guide surfaces 424, and the guide surfaces 424 define a guide space 425 as the rocker arms 420 move as the clamp arm 100 moves from the open position to the clamped position. The stopper 310 is disposed in the guide space 425, and the guide space 425 communicates with the locking groove 423. When the swing arm 420 moves to the rear end to drive the clamping arm 100 to move to the clamped state, the guide space 425 guides the locking groove 423 to be locked on the limiting member 310.

As shown in fig. 7 and 15, in one embodiment, the locking groove 423 is abutted to the front side of the guide space 425, and the lateral dimension of the guide space 425 is gradually reduced from rear to front.

To form the guide structure shown in fig. 7 and 15, in one embodiment, referring to fig. 7, 12 and 15, the rocker arm 420 has a guide surface 424 disposed obliquely, and the two inclined guide surfaces 424 cooperate to form a splayed-like guide space 425 when the clamping arm 100 moves from the open state to the clamped state. After the contact point of the rocker arm 420 with the stopper 310 passes over the turning point of the guide surface 424 of the rocker arm 420, the locking groove 423 is entered, and the clamping arm 100 is interlocked with the stopper 310.

Of course, in other embodiments, the guide surface 424 may have other shapes, thereby forming other shapes of the guide space 425.

To form a self-locking structure as shown in fig. 7 and 15, in one embodiment, referring to fig. 7, 12 and 15, the rocker arm 420 has a locking mating surface 422 having an arcuate shape. The latch mating face 422 is located on the front side of the guide face 424. When the clamping arm 100 is in the clamped state, the locking mating surfaces 422 of the two rocker arms 420 enclose an arcuate locking groove 423. When the limiting member 310 has a cylindrical structure (such as a limiting shaft), the arcuate locking groove 423 may be more fit with the limiting member 310.

Referring to fig. 12 and 15, in one embodiment, the locking mating surface 422 further has a straight line segment 426, and when the clamping arm 100 is in the clamping state, the straight line segments 426 of the two locking mating surfaces 422 can cooperate to form a vertical inlet and outlet of the locking slot 423, and the extending direction of the vertical inlet and outlet is consistent with the axial direction of the moving member 410. The vertical access may increase the difficulty of sliding the limiter 310 out of the locking groove 423.

Of course, in other embodiments, the vertical access may be replaced with a large inside-out splayed access or other form of access, making it more difficult for the stop 310 entering the locking slot 423 to slide out of the splayed access.

Further, when the moving member 410 moves toward the front end of the clipping device, the rocker arm 420 is driven to prop the supporting arm 300, so that the supporting arm 300 is switched to the open state. To define the opening angle of the support arm 300, an angle limiting structure may be provided on the support arm 300, or an angle limiting structure may be provided on the mover 410 and/or the swing arm 420.

For example, referring to fig. 8 and 11, in one embodiment, the front end of the moving member 410 has an angle limiting structure 414, and when the clamping arm 100 is in the open state, the angle limiting structure 414 forms a limit on the rear side of the limiting member 310, so as to prevent the moving member 410 from moving further to the front end, and limit the opening angle of the clamping arm 100.

In one embodiment, the angle limiting structure 414 is a limiting groove disposed at a front end of the moving member 410 facing away from a surface of the corresponding clamping arm 100, for example, the first seat 411 and the second seat 412 each have the limiting groove. The limiting groove serves as an angle limiting structure 414, and when the clamping arm 100 is in the open state, the bottom of the limiting groove can be in contact with the limiting member 310, so that a limit is formed to prevent the moving member 410 from continuing to move toward the front end, and the opening angle of the clamping arm 100 is limited.

In another embodiment, the angular limit feature may also be formed by the rocker arm 420. Referring to fig. 2-4 and fig. 12, in one embodiment, 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 position, the two stop portions 427 form an angular stop, such as being in a cross-like or right-to-left alignment. The angle limiting structure forms a limit at the rear side of the limiting member 310 to prevent the moving member 410 from continuing to move toward the front end, thereby limiting the opening angle of the clamp arm 100. When the limiting portion 427 is provided, an angle limiting structure may not be provided. The limiting part 427 is directly arranged on the rocker arm 420, can be integrally formed and manufactured, has a simple structure, and can simplify the structure of the whole clamping device.

In one embodiment, the rocker arm 420 may be integrally formed, such as by laser cutting or stamping using sheet metal. In one embodiment, when sheet metal material is used, the thickness of the rocker arm 420 may be selected to be between 0.3 mm and 0.6mm, which may ensure strength of the rocker arm 420 and may also avoid excessive weight of the rocker arm 420. Alternatively, the rocker arm 420 may be separately manufactured and then fixedly attached to each other for multiple components.

Referring to fig. 4 and 7, in one embodiment, the two rocker arms 420 are connected to the moving member 410 through respective shafts 4111, and the two rocker arms 420 are separated from and parallel to the rotation axis of the moving member 410. In other embodiments, the two rocker arms 420 may also be connected to the moving member 410 via a common shaft 4111.

Further, the moving member 410 is configured to move in the clamping structure 1 and drive the rocker arm 420 to move, and the movement of the moving member 410 relative to the clamping structure 1 may be, but is not limited to, sliding, rolling, etc. The mover 410 may take any shape and configuration that meets the requirements set forth above.

Referring to fig. 8, 9 and 11, in one embodiment, the moving member 410 is a slider, and the moving member 410 is slidably disposed in the clamping structure 1. The moving member 410 includes a first seat 411 and a second seat 412, and the rocker arm 420 is connected to and limited between the first seat 411 and the second seat 412, and the first seat 411 and the second seat 412 are spliced to form the moving member 410. In this structure, the moving member 410 is divided into the first and second seats 411 and 412, and manufactured separately, so that manufacturing difficulty can be reduced. The assembly structure can firstly mount the rocker arm 420 on the first base 411, then fasten the second base 412 on the first base 411, thus completing the assembly of the moving member 410 and the mounting of the rocker arm 420.

Referring to fig. 11, in one embodiment, the first housing 411 has a rotating shaft 4111, and the rocker arm 420 is sleeved on the rotating shaft 4111. The second base 412 may be fastened to the first base 411.

Of course, in other embodiments, the mover 410 may be of other construction, such as an integrally formed construction or a splice of three or more sub-components, with the rocker arm 420 being otherwise mounted to the mover 410.

In some embodiments, the moving member 410 may be a steel tube laser cut, or may be powder metallurgy formed (assembly is simpler).

Further, in one embodiment, to prevent the moving member 410 from rotating in the clamping structure 1, at least one support arm 300 has a limit guide portion disposed along a longitudinal direction thereof, and the moving member 410 has at least one limit guide engaging portion engaged with the limit guide portion to limit the movement of the moving member 410 in a direction defined by the limit guide portion.

In one embodiment, one of the limit guiding part and the limit guiding matching part is a guiding groove, the other is a guiding block arranged in a protruding mode, and the guiding block extends into the guiding groove. For example, referring to fig. 6 and 8, in one embodiment, the guide block 4113 is disposed on the moving member 410, specifically, on the outer wall of the first housing 411. The guide groove 320 is disposed on the support arm 300 corresponding to the first seat 411. Of course, when guiding is required on both sides, the second base 412 may be provided with a guiding block 4113, and the other supporting arm 300 corresponding to the second base 412 may be provided with a guiding groove 320.

Further, when the transmission member 510 moves along the third stroke, besides the above-mentioned limiting member 310 and the rocker arm 420 cooperate to perform self-locking, a locking structure may be further provided to lock the transmission member, so as to prevent the moving member 410 from resetting to cause the clamping arm 100 to be undesirably opened.

In one embodiment, the clamping structure 1 has a locking engagement portion and the mover 410 has a locking portion. The lock engagement portion and the lock portion are relatively movable to a lock position when the clamp arm 100 is in the clamped state. Thus, when the clamping arm 100 is separated from the transmission member 510, the locking portion and the locking matching portion can form a locking in time, so as 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.

Referring to fig. 13-15, in one embodiment, the locking portion is a clamping table 4122 disposed on the moving member 410, and the locking engaging portion is an elastic buckle 330 extending inward. The elastic catch 330 is disposed on a path along which the catch 4122 moves rearward, and the catch 4122 can move rearward beyond the position of the elastic catch 330 when the clamping arm 100 is in the clamped state. When the clamping arm 100 is separated from the transmission member 510, the clamping table 4122 can be reset a small distance along with the moving member 410 towards the front end under the elastic reset force of the clamping arm 100, and when the elastic buckle 330 abuts against the front side of the clamping table 4122, the clamping table 4122 is prevented from moving towards the front end of the clamping structure 1, so that locking is formed.

Further, in the present embodiment, the opening and closing of the clamping arm 100 mainly depend on the deformation of the bendable portion 120, unlike the prior art in which the opening and closing of the clamping arm 100 is achieved by limiting the clamping arm 100 by a sleeve. The bendable portion 120 has a structure capable of bending in the closing direction of the clip structure 1 and/or bending in the opening direction of the clip structure 1. Referring to fig. 5-7, in the illustrated embodiment, the initial state of the clamping structure 1 is the clamping state, i.e. the bending portion 120 is in the clamping state without deformation. At this time, the bendable portion 120 has at least a structure capable of bending in the opening direction of the clip structure 1, thereby realizing the opening of the clip structure 1 as shown in fig. 2 to 4.

The clamping head 110 is a hard segment, and is not easy to deform relative to the bendable portion 120. The bending deformation of the bendable portion 120 precedes the gripping head 110 during the forward and rearward movement of the mover 410 to ensure that the gripping arm 100 provides a better gripping effect on the target. The bending deformation of the bendable portion 120 may be achieved by structural deformation thereof, for example, by providing the bendable portion 120 with a bending structure capable of twisting deformation, by changing the thickness of the material of the bendable portion 120, or by selecting a material that is easier to deform, but may be achieved by other structures. The bending deformation of the bendable portion 120 is reversible, that is, the bendable portion 120 has elasticity and can rebound when the external force is lost, so that the bending deformation can be repeatedly performed.

Referring to fig. 2-7, in one embodiment, the bendable portion 120 has a semi-cylindrical structure, and the bendable portion 120 is capable of enclosing a cylindrical structure when the clamping arm 100 is closed. The semi-cylindrical shape refers to a non-complete cylindrical shape, and is not necessarily half of a cylindrical structure, but may be one third or other sizes of the whole cylindrical structure. In addition, in other embodiments, the bendable portion 120 may have other structures, such as a sheet shape, and is not limited to the semi-cylindrical structure.

Further, referring to fig. 1-7 and 19, in one embodiment, the bendable portion 120 includes a plurality of first shrinkage slit groups 121 and second shrinkage slit groups 122. Each first shrinkage joint group 121 has at least one first shrinkage joint 1211, each second shrinkage joint group 122 has at least one second shrinkage joint 1221, and the first shrinkage joint 1211 and the second shrinkage joint 1221 are disposed to extend in the circumferential direction of the bendable portion 120. The first shrinkage joint groups 121 and the second shrinkage joint groups 122 are arranged at intervals in the longitudinal direction of the clamping arm 100, and one first shrinkage joint group 121 is arranged between the two second shrinkage joint groups 122. Wherein the overlapped area between the first shrinkage joint 1211 and the second shrinkage joint 1221 forms a distortion section 124 so that the bendable portion 120 can be bent and torsionally deformed.

In one embodiment, as shown in fig. 5 and 19, the clamping structure 1 is maintained in the clamped state in the initial state, and the first shrinkage joints 1211 are maintained in the initial state, and the portions of the bendable portion 120 are not deformed. As shown in fig. 2 and 19, when it is desired to open the clamping structure 1, the bendable portion 120 is deformed outwardly, the first shrinkage slit 1211 and the second shrinkage slit 1221 are shrunk, and the twisting deformation section 124 is subjected to bending torsional deformation, so that the outer sides (sides where the clamping arms 100 are away from each other) of the bendable portion 120 are shrunk, so that the entire clamping head 110 is opened.

Further, referring to fig. 20, after the clamping arm 100 clamps the target tissue 2, the moving member 410 needs to move to a predetermined locking position together with the clamping arm 100 to perform locking, that is, the clamping table 4122 needs to move to a position corresponding to the elastic buckle 330 to perform locking. However, in actual use, when the hardness or thickness of the clamping structure 1 clamping human tissue is different (as shown in fig. 20), the closing angle of the clamping structure 1 may be limited. Because the closing angle is associated with the travel of the moving member 410, the moving member 410 cannot move to the locking position, and the clamping arm 100 cannot be maintained in the clamped state.

For this problem, please refer to fig. 19 and 20, the bendable portion 120 has a deformed portion 123 in a ring shape. When the clamp arm 100 is in the clamped state, if clamped to a large target tissue 2, the clamp arm 100, the moving member 410, and the rocker arm 420 are difficult to move to a position where self-locking with the stopper 310 and locking with the locking engagement portion can be achieved. When a larger pulling force is continuously applied to the transmission member 510, the deformation portion 123 is forced to be capable of being pressed and deformed inwards, so as to drive the clamping arm 100, the moving member 410 and the rocker arm 420 to move towards the rear end of the insertion type tissue clamping device relative to the supporting portion and the limiting member 310, and further achieve self-locking of the rocker arm 420 and the limiting member 310 and locking of the moving member 410 and the locking matching portion. The deformation portion 123 and the support arm 300 have a gap therebetween, so as to form a clearance area on the outer periphery of the deformation portion 123, thereby facilitating deformation.

Referring to fig. 19, in one embodiment, the deformation portion 123 has an elliptical structure.

The above embodiment shows a structure in which the bendable portion 120 is subjected to bending deformation by opening the first shrinkage joint group 121, the second shrinkage joint group 122, and the twisting deformation section 124, and the structure of the bendable portion 120 of the present embodiment is not limited thereto, and may be realized in other manners.

For example, in one embodiment, in the clamping arm 100, the thickness of the bendable portion 120 may be further set to be thinner than other portions, for example, thinner than the clamping head 110 and the connecting portion 140, so that the bendable portion 120 can preferentially bend and deform when the moving member 410 moves the clamping arm 100.

In one embodiment, in the clamping arm 100, the flexible portion 120 may have a material and structure that is more flexible and deformable, for example, a material that is more flexible and deformable than the clamping head 110 and the connecting portion 140, such as a metal material, a plastic material, or a wire mesh with better bending performance, so that the flexible portion 120 can be preferentially bent and deformed when the moving member 410 moves the clamping arm 100. Of course, other structures with better bending deformation performance, such as a metal braiding structure, can be used for the bendable portion 120.

Further, the first stroke, the second stroke and the third stroke are three parts of the whole movement stroke of the transmission member 510, and the three strokes may be the same direction, or may be different directions between at least two strokes. The strokes may be completely separated from each other, completely unrelated, or may be continuous or overlapping between at least two strokes, e.g., a third stroke may be closely coupled after a second stroke. Of course, the second stroke and the third stroke may also be two separate, non-contiguous portions.

As an example, please refer to fig. 2-4, at this time, the transmission member 510 is in the first stroke, at this time, the transmission member 510 moves away from the control handle 3 along the axial direction thereof, and moves toward the front end, so as to drive the clamping arm 100 to open outwards, thereby moving the clamping arm 100 to the open state.

Referring to fig. 5-7, at this time, the transmission member 510 is in the second stroke, the transmission member 510 moves toward the rear end along the axial direction thereof near the control handle 3, and the transmission member 510 can drive the clamping arms 100 to approach each other inwards, so that the clamping arms 100 move to the clamping state.

Referring to fig. 13-18 and fig. 21-26, at this time, the transmission member 510 is in a third stroke, and the transmission member 510 is close to the control handle 3 along the axial direction thereof, and when the transmission member is away from the clamping arm 100, the third stroke is in the same direction as the second stroke, and is tightly connected with the second stroke, i.e. when the clamping arm 100 moves to the clamping state, the transmission member 510 is switched from the second stroke to the third stroke. Wherein the third stroke can be divided into a plurality of sub-strokes, and the sub-strokes comprise a locking stroke, an inner disengaging stroke and an outer disengaging stroke.

Referring to fig. 16-18, when the transmission member 510 is shifted to the third stroke until it moves to the illustrated position, the clamping arm 100 is locked, and the transmission member 510 cannot move in the reverse direction to open the clamping arm 100. The motion stroke of the transmission member 510 in this process is a locking stroke.

Referring to fig. 21-23, after the transmission 510 completes the locking stroke, it enters the inner disengagement stroke. When the transmission member 510 moves to the illustrated position, the clamping arm 100 is separated from the transmission member 510, and the transmission member 510 can no longer drive the clamping arm 100 to move, so that the control of the clamping arm 100 is lost, and the clamping arm 100 is kept in the locked state. The motion stroke of the driving member 510 in this process is an inner disengaging stroke.

24-26, the transmission 510 enters the outer disengagement stroke after completing the inner disengagement stroke. When the transmission member 510 is moved to the illustrated position, at this time, the clamp arm 100 and the separation base 200 are disengaged, and thus the clamp arm 100 is left on the target tissue 2 clamped thereby. The separation base 200 and the transmission 510 may be withdrawn from the patient. The motion of the driver 510 is an out-of-range motion.

Further, referring to fig. 2-7, in one embodiment, the clamping arm 100 includes a connecting portion 140, the connecting portion 140 is disposed at the rear side of the bendable portion 120, and the connecting portion 140, the bendable portion 120, the clamping head 110 and the supporting arm 300 are integrally formed. The connection 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 connection portion 140 may be integrally formed, or may be separately manufactured and then fixedly connected.

To achieve the external detachment, in one embodiment, referring to fig. 3 and 24-26, the detachment base 200 is rotatably coupled to the sleeve assembly 520, such that the clamping structure 1 can integrally rotate relative to the sleeve assembly 520, and the clamping arm 100 and the supporting arm 300 are integrally coupled to the detachment base 200 via the first tear portion 210. In this embodiment, the separation base 200 and other parts of the clamping structure 1 are integrally formed, and are integrally connected by the first tearing portion 210. The separation base 200 and the other part of the clamping structure 1 may be integrally connected by a snap-fit connection or the like.

In one embodiment, referring to fig. 3 and 24-26, the separation base 200 has a follower 220, and the follower 220 is used for receiving an external force to drive the separation base 200 to break from the first tearing portion 210 and other portions of the clamping structure 1. For example, an external force applied by an operator may be transmitted to the first tear portion 210 through the mover 410 or other means.

24-26, in one embodiment, the follower 220 is driven to move by a mover 410. Specifically, the follower 220 is located on the moving track of the moving member 410, and when the moving member 410 moves to the position of the follower 220, the follower 220 is driven to move toward the control handle 3 together. Thereby breaking the separation base 200 and the connection portion 140, etc. from the first tearing portion 210 by the moving member 410.

As a more specific example, referring to fig. 24-26, the follower 220 is a limiting shaft, and the limiting shaft is disposed in the limiting groove 513.

Referring to fig. 3, when the limit 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.

The foregoing description of the utility model has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the utility model pertains, based on the idea of the utility model.

Claims

1. A male tissue gripping device, comprising:

2. The insertion tissue gripping device of claim 1, further comprising a moving member and at least two rocker arms, the gripping structure defining a movement space disposed axially therealong, the moving member disposed within the movement space, the moving member for cooperating with the control handle for reciprocal movement within the movement space; one end of the rocker arm is hinged to the moving piece, and the other end of the rocker arm is connected with a corresponding clamping arm respectively so as to drive the clamping arm to open and close;

3. The insertion tissue gripping device of claim 2, wherein the stop member is of a shaft-like configuration, and the two stop members are dumbbell-shaped in distribution on the stop member.

4. The insertion tissue gripping device of claim 2, wherein the two rocker arms are in a cross-like arrangement and the stop member is positioned in a cross-like region defined by the two rocker arms and adjacent the moving member such that the stop member contacts at least one of the rocker arms and forms a fulcrum of the lever structure for the at least one rocker arm when the moving member moves rearward.

5. The insertion tissue gripping device of claim 4, wherein a moment arm of the rocker arm from the center of the stop member relative to a center of rotation of the moving member is greater than a moment arm of the rocker arm from the center of the stop member relative to a center of connection of the rocker arm to the gripping arm when the gripping arm is in a gripping state.

6. The insertion tissue gripping device of claim 4, wherein the two rocker arms have locking mating surfaces that define a locking slot when the gripping arms are in the gripping state, the stop member being positioned in the locking slot to prevent lateral cross movement of the two gripping arms to retain the gripping arms in the gripping state.

7. The insertion tissue clamping device according to claim 6, wherein the two rocker arms have guide surfaces, the guide surfaces define a guide space when the clamping arms move from the open state to the clamped state, the limiting member is disposed in the guide space, and the guide space is communicated with the locking groove so as to guide the locking groove to be clamped on the limiting member when the rocker arms drive the clamping arms to move to the clamped state.

8. The insertion tissue gripping device of claim 7, wherein the rocker arms have the guide surfaces disposed obliquely and the locking engagement surfaces being arcuate, the locking engagement surfaces being located on a front side of the guide surfaces, the locking engagement surfaces of the two rocker arms defining arcuate locking grooves when the gripping arms are in the gripping state.

9. The insertion tissue clamping device according to claim 2, wherein one end of the two rocker arms connected to the moving member has a protruding limiting portion, the limiting portion forms a limiting structure when the clamping arms are in an open state, and the limiting structure forms a limit on the rear side of the limiting member to prevent the moving member from continuing to move toward the front end and limit the opening angle of the clamping arms.

10. The insertion tissue gripping device of any one of claims 2-9, wherein the gripping structure includes a pair of support arms, the support arms and the gripping arms being integrally formed or fixedly connected, a pair of the support arms being oppositely disposed at a gap between two of the gripping arms, and two ends of the limiting member being fixedly connected to one of the support arms, respectively.