A hemostatic clip

Abstract

The present invention relates to a hemostatic clip, comprising a traction mechanism, the distal end of which is provided with an inner hole; a clamping mechanism, comprising a tightening tube and a chuck assembly; a first locking portion is provided on the tightening tube; the chuck assembly is partially provided inside the tightening tube and comprises a joint and a chuck body; the proximal end of the joint is inserted into the inner hole and is interference-fitted with the inner hole; the chuck body is connected to the distal end of the joint, and the distal end of the chuck body extends from the distal end of the tightening tube; a second locking portion is provided on the chuck assembly; when the second locking portion is separated from the first locking portion, the chuck body can switch between an open state and a closed state; when the chuck body is in a closed state and the second locking portion is connected to the first locking portion, the chuck assembly is locked, and when the traction mechanism is subjected to a pulling force greater than a first predetermined value, the proximal end of the joint comes out of the inner hole. When the connection between the joint and the traction mechanism is released, no component will break, so that the broken objects are prevented from being retained in the body and causing inflammation and other problems, thereby improving the safety of use.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a hemostatic clip. Background Art

[0002] With the continuous advancement of endoscopic minimally invasive technology, endoscopic submucosal dissection (ESD), endoscopic retrograde cholangiopancreatography (ERCP), natural orifice endoscopic surgery (NOTES) and other endoscopic treatment surgeries have been widely carried out. Safe and effective closure of defects or perforations in digestive tract tissues during surgery is a key issue that must be addressed in various endoscopic minimally invasive surgeries.

[0003] A hemostatic clip is a device used to close defects or perforations in lumen tissue. The clamp of the hemostatic clip in the prior art can realize the opening, closing and rotating functions. After being transported to the target position, the clamp is driven to move by a traction mechanism to realize the opening, closing and rotating functions, and clamp the tissue at the target position. After that, the clamp is separated from the traction mechanism and retained in the body until the tissue at the target position grows completely to close the defect or perforation at the position, and then falls off and is discharged from the body through the digestive tract.

[0004] The chuck of the hemostatic clip in the prior art can be connected to the traction mechanism through a hook, and the connection between the two can be released by breaking the hook, but once the broken hook falls into the wound, it will cause inflammation and other problems. Alternatively, the chuck can be connected to the traction mechanism through the cooperation of the ball head and the connecting yoke, and the connection can be released by the deformation of the connecting yoke, but the processing technology of the connecting yoke is complicated. Summary of the invention

[0005] The object of the present invention is to provide a hemostatic clip which has a simple and reliable structure and has no risk of residual broken parts when in use.

[0006] To achieve the above object, the present invention provides a hemostatic clip, comprising:

[0007] A traction mechanism, wherein a distal end of the traction mechanism is provided with an inner hole; and

[0008] The clamping mechanism comprises a tightening tube and a chuck assembly; the tightening tube is provided with a first locking portion; the chuck assembly is partially arranged inside the tightening tube and comprises a joint portion and a chuck body; the proximal end of the joint portion is inserted into the inner hole and has an interference fit with the inner hole; the chuck body is connected to the distal end of the joint portion, and the distal end of the chuck body extends from the distal end of the tightening tube; the chuck assembly is also provided with a second locking portion;

[0009] The hemostatic clip is configured to allow the traction mechanism to drive the clamp assembly to reciprocate along the axial direction of the tightening tube under the action of external force when the second locking portion is separated from the first locking portion, so that the clamp body switches between an open state and a closed state;

[0010] The hemostatic clip is also configured to prevent the clamp assembly from moving axially along the tightening tube when the clamp body is in the closed state and the second locking portion is connected to the first locking portion, and when the traction mechanism is subjected to a pulling force greater than a first predetermined value, the proximal end of the engagement portion disengages from the inner hole.

[0011] Optionally, the hemostatic clip further comprises a sleeve assembly, the distal end of which is detachably connected to the proximal end of the tightening tube and communicates with the tightening tube, and is configured to be able to rotate relative to the tightening tube; the traction mechanism is partially disposed inside the sleeve assembly and is able to move along the axial direction of the sleeve assembly;

[0012] The hemostatic clip is configured such that the traction mechanism drives the clamp assembly to rotate around the axis of the traction mechanism under the action of an external force, and the tightening tube rotates at the same time.

[0013] Optionally, a first limiting portion is provided on the socket assembly, and a second limiting portion is provided on the traction mechanism; the second limiting portion cooperates with the first limiting portion to prevent the second locking portion from being connected to the first locking portion.

[0014] Optionally, the socket assembly comprises a sleeve, the distal end of the sleeve is inserted into the tightening tube from the proximal end of the tightening tube, and the distal end surface of the sleeve constitutes the first limiting portion;

[0015] The distal end of the traction mechanism is provided with a first bending wing bent toward the outside of the traction mechanism, the first bending wing is configured to be elastic and constitutes the second limiting portion;

[0016] The hemostatic clip is configured to prevent the clamp assembly from moving toward the proximal end of the tightening tube when the first bending wing abuts against the distal end face of the sleeve, and the second locking portion is located on the distal side of the first locking portion; when the traction mechanism is subjected to a pulling force greater than a second predetermined value, the first bending wing deforms and allows the traction mechanism to drive the clamp assembly to move toward the proximal end of the tightening tube until the second locking portion is connected to the first locking portion; the second predetermined value is less than the first predetermined value.

[0017] Optionally, the clamping mechanism further includes a third limiting portion, which is arranged on the tightening tube and located on the distal side of the engaging portion, for restricting the maximum distance of movement of the clamp assembly toward the distal end of the tightening tube to prevent the clamp assembly from escaping from the distal end of the tightening tube.

[0018] Optionally, the first locking portion comprises a locking hole arranged on the side wall of the tightening tube; the second locking portion comprises a clamping block arranged on the surface of the chuck body on one side close to the inner wall of the tightening tube;

[0019] The third limiting portion is also used to limit the relative position of the clamp assembly and the tightening tube in the circumferential direction so that the clamping block can be clamped into the locking hole.

[0020] Optionally, the third limiting portion extends in the radial direction of the tightening tube and forms two channels with the tube wall of the tightening tube;

[0021] The clamp body comprises two clamp arms arranged opposite to each other, and the distal ends of the two clamp arms pass through the two channels respectively and extend from the distal end of the tightening tube.

[0022] Optionally, the third limiting portion includes a pin; or the third limiting portion includes two first retaining walls disposed at the distal end of the tightening tube, and the two first retaining walls are symmetrically arranged.

[0023] Optionally, the socket assembly includes a sleeve and an elastic connector; the sleeve includes a distal segment and a proximal segment, the outer diameter of the distal segment is smaller than the outer diameter of the proximal segment, so that a step surface is formed on the outer wall of the sleeve; the distal segment is provided with a first through hole; the elastic connector includes a base and a rod, the base is arranged inside the sleeve, and a second through hole for the traction mechanism to pass through is opened on the base; the rod is arranged on a side of the base close to the distal end of the sleeve and extends along the axial direction of the sleeve, and the distal end of the rod forms a second bending wing; the second bending wing passes through the connecting hole and extends to the outside of the sleeve to form a receiving groove with the step surface;

[0024] A fourth limiting portion protruding inward is formed at the proximal end of the tightening tube, the proximal end of the tightening tube is sleeved on the distal end segment of the sleeve, and the fourth limiting portion is arranged at the accommodating groove.

[0025] Optionally, the traction mechanism comprises a core wire and a connecting tube, wherein the connecting tube is arranged at the distal end of the core wire and has the inner hole; the core wire passes through the second through hole, the connecting tube is located at the distal end side of the base, and the outer diameter of the connecting tube is larger than the aperture of the second through hole;

[0026] The hemostatic clip is configured such that when the proximal end of the engaging portion escapes from the inner hole and the proximal end of the connecting tube abuts against the base, the traction mechanism is subjected to a pulling force greater than a third predetermined value, so as to deform the second bending wing and release the connection between the socket assembly and the tightening tube.

[0027] Optionally, the hemostatic clip further comprises a handle assembly, the handle assembly comprising a gripping portion, a sliding portion and a rotating portion; the gripping portion is provided with a slide groove extending in the axial direction, the sliding portion is arranged on the slide groove and can slide along the slide groove; the rotating portion is rotatably arranged on the distal end of the gripping portion; the proximal end of the traction mechanism passes through the proximal end of the socket assembly and further extends into the interior of the handle assembly to be connected with the sliding portion and the rotating portion of the handle assembly;

[0028] The hemostatic clip is configured such that when the sliding portion slides along the sliding groove, the sliding portion drives the traction mechanism to move axially along the sleeve assembly to drive the chuck assembly to move axially along the tightening tube; when the rotating portion rotates relative to the holding portion, the rotating portion drives the traction mechanism to rotate to drive the chuck assembly and the tightening tube to rotate.

[0029] Optionally, the traction mechanism includes a core wire, a connecting tube, a first connecting block and a second connecting block; wherein the connecting tube is arranged at the distal end of the core wire and has the inner hole; the first connecting block and the second connecting block are both arranged at the proximal end of the core wire, and the second connecting block is located on the proximal side of the first connecting block; the first connecting block is connected to the rotating part and is configured to rotate synchronously with the rotating part and can move relative to the rotating part in the axial direction; the second connecting block is connected to the sliding part and is configured to remain relatively stationary with the sliding part in the axial direction and can rotate relative to the sliding part in the circumferential direction; and / or,

[0030] The socket assembly also includes a spring tube, the distal end of which is connected to the proximal segment of the sleeve, and a positioning tube is provided at the proximal end of the spring tube; the positioning tube is connected to the rotating part of the handle assembly and is configured to remain relatively stationary with the rotating part in the axial direction and to be able to rotate relative to the rotating part in the circumferential direction.

[0031] Compared with the prior art, the hemostatic clip of the present invention has the following advantages:

[0032] The aforementioned hemostatic clip includes a traction mechanism and a clamping mechanism; wherein, an inner hole is provided at the distal end of the traction mechanism; the clamping mechanism includes a tightening tube and a clamp assembly; a first locking portion is provided on the tightening tube; the clamp assembly is partially provided inside the tightening tube and includes a joint and a clamp body; the proximal end of the joint is inserted into the inner hole and has an interference fit with the inner hole; the clamp body is connected to the distal end of the joint, and the distal end of the clamp body extends from the distal end of the tightening tube; a second locking portion is also provided on the clamp assembly. Initially, the second locking part and the first locking part are separated from each other. The operator can drive the chuck assembly to reciprocate along the axial direction of the tightening tube by applying external force to the traction mechanism, so that the chuck body switches between the open state and the closed state; when the chuck body clamps the tissue at the target position and has switched to the closed state, the operator applies a pulling force to the traction mechanism to connect the second locking part with the first locking part. At this time, the chuck body is locked in the closed state. Then the operator applies a pulling force greater than a first predetermined value to the traction mechanism to make the proximal end of the engaging part escape from the inner hole, thereby releasing the connection between the chuck assembly and the traction mechanism. The chuck assembly is connected by an interference fit between the engaging part and the inner hole of the traction mechanism. The structure is simple. When releasing the connection, only an appropriate pulling force needs to be applied. There will be no breakage of structural components, and there will be no problem of broken components remaining in the body and entering the wound. It is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to better understand the present invention and do not constitute an improper limitation of the present invention.

[0034] Figure 1 is a schematic diagram of the structure of a hemostatic clip provided according to an embodiment of the present invention, wherein the clamp assembly is in an open state;

[0035] Figure 2 is a schematic diagram of the structure of a hemostatic clip provided according to an embodiment of the present invention, wherein the clamp assembly is in a closed state;

[0036] Figure 3 is a partial structural schematic diagram of a hemostatic clip provided according to an embodiment of the present invention;

[0037] Figure 4 is a partial cross-sectional view of a hemostatic clip provided according to an embodiment of the present invention;

[0038] Figure 5 is a partial cross-sectional view of a hemostatic clip provided according to an embodiment of the present invention, in which the clamp assembly is in a closed state, and the first locking portion is not connected to the second locking portion;

[0039] Figure 6 is a partial cross-sectional view of a hemostatic clip provided according to an embodiment of the present invention, in which the clamp assembly is in a closed state, the first locking portion is connected to the second locking portion, and the proximal end of the engagement portion is disengaged from the inner hole of the traction mechanism;

[0040] Figure 7 is a partial schematic diagram of a hemostatic clip provided according to an embodiment of the present invention, in which the first locking portion is connected to the second locking portion;

[0041] Figure 8 is a schematic structural diagram of a connecting tube of a hemostatic clip provided according to an embodiment of the present invention;

[0042] Fig. 9 is a partial structural schematic diagram of a hemostatic clip provided according to an embodiment of the present invention, and the diagram mainly shows a proximal structural schematic diagram of a traction mechanism;

[0043] Fig.10 is a cross-sectional view of a tightening tube of a hemostatic clip provided by the present invention according to an embodiment;

[0044] Fig.11 1 is a schematic diagram of the matching relationship between the tightening tube and the third limiting portion of the hemostatic clip provided according to an embodiment of the present invention, wherein (a) is a schematic diagram when the second retaining wall is not bent, and (b) is a schematic diagram when the second retaining wall is bent to form the third limiting portion;

[0045] Fig.12 is a schematic structural diagram of a joint portion of a hemostatic clip provided according to an embodiment of the present invention;

[0046] Fig.13 is a partial cross-sectional view of a hemostatic clip provided according to an embodiment of the present invention, and mainly shows the connection relationship between the socket assembly and the tightening tube;

[0047] Fig.14 is a schematic structural diagram of an elastic connecting member of a hemostatic clip provided by an embodiment of the present invention;

[0048] Fig.15 is a schematic structural diagram of a handle assembly of a hemostatic clip provided by an embodiment of the present invention;

[0049] Fig.16 It is an exploded schematic diagram of a handle assembly of a hemostatic clip provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0050] The following is an explanation of the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the present embodiment only illustrate the basic concept of the present invention in a schematic manner, and only the components related to the present invention are shown in the figure instead of being drawn according to the number, shape and size of the components in the actual implementation. The type, quantity and proportion of each component in the actual implementation can be a random change, and the component layout type may also be more complicated.

[0051] In addition, each embodiment of the following description has one or more technical features, but this does not mean that the user of the present invention must implement all the technical features in any embodiment at the same time, or can only implement part or all of the technical features in different embodiments separately. In other words, under the premise that implementation is possible, those skilled in the art can selectively implement part or all of the technical features in any embodiment according to the disclosure of the present invention and according to the design specifications or implementation requirements, or selectively implement a combination of part or all of the technical features in multiple embodiments, thereby increasing the flexibility of the implementation of the present invention.

[0052] As used in this specification, the singular forms "a", "an", and "the" include plural objects, and the plural form "plurality" includes more than two objects, unless the content clearly indicates otherwise. As used in this specification, the term "or" is generally used to include the meaning of "and / or", unless the content clearly indicates otherwise, and the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and it can be a connection between the internal parts of two elements or an interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0053] In order to make the purpose, advantages and features of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings. It should be noted that the drawings are all in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. The same or similar reference numerals in the drawings represent the same or similar components.

[0054] In this article, the terms "proximal" and "distal" refer to the relative orientation, relative position, and direction of components or actions relative to each other from the perspective of a doctor using the medical device. Although "proximal" and "distal" are not restrictive, "proximal" usually refers to the end of the medical device that is close to the doctor during normal operation, and "distal" usually refers to the end that first enters the patient's body.

[0055] Please refer to Figures 1 to 7 The embodiment of the present invention provides a hemostatic clip, which includes a traction mechanism 1000 and a clamping mechanism 2000. An inner hole 1001 is provided on the distal end of the traction mechanism 1000. The clamping mechanism 2000 includes a tightening tube 2100 and a chuck assembly 2200. A first locking portion is provided on the tightening tube 2100. The chuck assembly 2200 is partially arranged inside the tightening tube 2100, and includes a joint 2210 and a chuck body. The proximal end of the joint 2210 is inserted into the inner hole 1001 and has an interference fit with the inner hole 1001. The chuck body is connected to the distal end of the joint 2210, and the distal end of the chuck body extends from the distal end of the tightening tube 2100 to the outside of the tightening tube 2100. A second locking portion is also provided on the chuck assembly 2200.

[0056] The hemostatic clip is configured to allow the traction mechanism to drive the clamp assembly 2200 to move along the axial direction of the tightening tube 2100 under the action of the external force when the second locking portion is separated from the first locking portion, so that the clamp body switches between an open state and a closed state. In this way, the clamp body can adjust its posture to clamp the target object.

[0057] The hemostatic clip is also configured to prevent the chuck assembly 2200 from moving axially along the tightening tube 2100 when the chuck body is in the closed state and the second locking portion is connected to the first locking portion. In this way, when the chuck body clamps the target object, the chuck body can be locked in the closed state by the connection between the second locking portion and the first locking portion to maintain the clamping of the target object. At this time, the operator applies a pulling force greater than a first predetermined value to the traction mechanism 1000, so that the proximal end of the engaging portion 2210 can be disengaged from the inner hole 1001, and the connection between the chuck assembly 2200 and the traction mechanism 1000 is released. It should be understood that the first predetermined value is determined according to the interference fit force between the engaging portion 2210 and the inner hole 1001. When the pulling force is greater than the first predetermined value, the pulling force can overcome the interference fit force. In the hemostatic clip provided in the embodiment of the present invention, the connection method between the clamp assembly 2200 and the traction mechanism 1000 is simple and reliable, and easy to use. When the connection between the two is released, there is no problem of structural part breakage, and there is no problem of broken objects entering the wound and causing inflammation, thereby improving the safety of use.

[0058] Please focus on Figures 4 to 6 The hemostatic clip further comprises a socket assembly 3000, the distal end of which is detachably connected to the proximal end of the tightening tube 2100 and communicates with the tightening tube 2100. The traction mechanism 1000 is partially disposed inside the socket assembly 3000 and is capable of moving along the axial direction of the socket assembly 3000. The “detachably connected” means that the socket assembly 3000 and the tightening tube 2100 can be disconnected under predetermined conditions.

[0059] The socket assembly 3000 is provided with a first limiting portion, and the traction mechanism 1000 is provided with a second limiting portion, and the second limiting portion cooperates with the first limiting portion to prevent the second locking portion from connecting with the first locking portion. Before the second locking portion is connected with the first locking portion, the chuck assembly can reciprocate along the axial direction of the tightening tube 2100 to adjust the posture of the chuck assembly.

[0060] Optionally, the clamping mechanism further includes a third limiting portion, which is arranged on the tightening tube 2100 and located at the distal side of the engaging portion 2210, and is used to restrict the maximum distance of the chuck assembly 2200 moving toward the distal end of the tightening tube 2100, so as to prevent the chuck assembly 2200 from being disengaged from the distal end of the tightening tube 2100. In addition, the third limiting portion is also configured to limit the relative position of the chuck assembly 2200 and the tightening tube 2100 in the circumferential direction, so that the second locking portion is aligned with the first locking portion in the circumferential direction, so that the two can be smoothly connected. In this embodiment, the tightening tube 2100 is also configured to be able to rotate relative to the socket assembly 3000, so that when the traction mechanism 1000 rotates under the action of an external force to drive the chuck assembly 2200 to rotate, the tightening tube 2100 will not interfere with the rotational movement of the chuck assembly 2200. In other words, the traction mechanism 1000 can drive the clamp assembly 2200 to rotate around the axis of the traction mechanism 1000 and can also drive the tightening tube 2100 to rotate.

[0061] In addition, the hemostatic clip further includes a handle assembly 4000, which is used to be connected to the proximal end of the traction mechanism 1000. The operator can apply a force to the traction mechanism 1000 by operating the handle assembly 4000, thereby driving the clamping assembly 2000 to perform various actions.

[0062] Next, the structure of each component of the hemostatic clip and the assembly relationship between them will be described in detail in conjunction with the accompanying drawings. Those skilled in the art should know that the various components of the following structure are only available structures of the hemostatic clip described in the embodiment of the present invention, and are not necessary choices, and therefore should not limit the present invention.

[0063] Please refer to Figures 4 to 6 , and combined with Figure 8 The traction mechanism 1000 includes a core wire 1100 and a connecting tube 1200. The connecting tube 1200 is arranged at the distal end of the core wire 1100 and has the inner hole 1001, and the outer diameter of the connecting tube 1200 is greater than the outer diameter of the core wire 1100. The distal end of the traction mechanism 1000, specifically, the distal end of the connecting tube 1200 is provided with a plurality of first bending wings 1210 bent toward the outside of the connecting tube 1200, and the plurality of first bending wings 1210 are arranged at intervals along the circumference of the connecting tube 1200, preferably evenly arranged. The bending angle of each first bending wing 1210 can be 90°, and the first bending wing 1210 is also configured to have elasticity.

[0064] Please refer to Fig. 9, the traction mechanism 1000 also includes a first connection block 1300 and a second connection block 1400. The first connection block 1300 and the second connection block 1400 are both arranged at the proximal end of the core wire 1100, and the first connection block 1300 is located at the proximal side of the second connection block 1400. The first connection block 1300 has a non-rotational shape, that is, the cross section of the first connection block is non-circular, for example, it can be a triangle, a quadrilateral and a hexagon. The cross section of the second connection block 1400 can be circular. The first connection block 1300 and the second connection block 1400 are both connected to the handle assembly 4000, and the specific connection relationship will be described later. Preferably, the core wire 1100 includes a core wire body and a core wire sleeve coated on the outer surface of the core wire body. The purpose of setting the core wire sleeve is to reduce the friction force when the traction mechanism 1000 moves along the axial direction of the socket assembly 3000, and reduce the probability of the core wire 1100 bending.

[0065] In addition, the traction mechanism 1000 further includes a reinforcing sleeve 1500, which is sleeved on the portion of the core wire 1100 between the first connection block 1300 and the second connection block 1400, and the axial ends of the reinforcing sleeve 2500 are respectively connected to the first connection block 1300 and the second connection block 1400. The reinforcing sleeve 1500 is used to enhance the strength of the traction mechanism 1000 to prevent bending.

[0066] Please refer to Figure 3 The tightening tube 2100 may be a cylindrical structure and have a first inner cavity that runs axially through it. The first locking portion includes a locking hole 2101 disposed on the proximal side wall of the tightening tube 2100. The proximal end of the tightening tube 2100 is also provided with a fourth limiting portion 2102 (such as Figure 6 shown).

[0067] In some embodiments, the tightening tube 2100 has a uniform inner diameter over the entire axial length, and the fourth limiting portion may be a second retaining wall (not shown) disposed at the proximal end of the tightening tube 2100. Fig.10 As shown, an annular groove 2103 is formed on the inner wall of the proximal end of the tightening tube 2100 , and the tube wall of the tightening tube 2100 located on the proximal side of the annular groove 2103 constitutes the fourth limiting portion 2102 .

[0068] Please refer to Figures 3 to 7 The third limiting portion is disposed at the distal end of the tightening tube 2100 and extends radially along the tightening tube 2100, and the third limiting portion and the tube wall of the tightening tube 2100 together form two channels 2104 (such as Fig.11In some embodiments, as shown in (b) in FIG. Figures 3 to 7 As shown, the third limiting portion includes a pin shaft 2300, and the axial ends of the pin shaft 2300 are respectively connected to the tube wall of the tightening tube 2100, so that two mutually isolated channels 2104 are formed between the pin shaft 2300 and the tube wall. Fig.11 As shown, the third position-limiting portion includes two first retaining walls 2105 disposed at the distal end of the tightening tube 2100. The two first retaining walls 2105 are preferably symmetrically disposed and can abut against each other. During processing, a portion of material can be cut from a complete cylindrical tube to form the two first retaining walls 2105. At this time, the cylindrical portion of the tube can be used as the tightening tube 2100, and the first retaining wall 2105 extends along the axial direction of the tube. Then, a force is applied to the first retaining wall 2105 to make it bend radially inward along the tightening tube 2100.

[0069] Fig.12 FIG. 2 shows a schematic diagram of the structure of the joint 2210. Fig.12 As shown, the joint portion 2210 includes a first connecting shaft 2211, a third connecting block 2212 and a second connecting shaft 2213. The first connecting shaft 2211 and the second connecting shaft 2213 are respectively connected to the third connecting block 2212, and the first connecting shaft 2211 and the second connecting shaft 2213 are perpendicular to each other. The axial ends of the first connecting shaft 2211 extend out of the third connecting block 2212 and are used to connect to the chuck assembly (such as Figures 4 to 6 The distal end of the second connecting shaft 2213 is connected to the third connecting block 2212, and the proximal end of the second connecting shaft 2213 is used to be inserted into the inner hole 1001 of the traction mechanism 1000 and to be interference fit with the inner hole 1001 (as shown in FIG. Figure 4 , Figure 5 shown).

[0070] like Figures 4 to 6 As shown, the chuck body includes two clamp arms 2221, and the proximal ends of the two clamp arms 2221 are respectively connected to the axial ends of the first connecting shaft 2211. The clamp arms 2221 are configured to be elastic, and a clamp block 2222 is provided on the proximal outer surface of the clamp arm 2221 to serve as the second locking portion. The "outer surface" refers to the surfaces of the two clamp arms 2221 that are away from each other, that is, when they are assembled to the tightening tube 2100, the surface of the clamp arm 2221 facing the inner wall of the tightening tube 2100 is the outer surface.

[0071] When the traction mechanism 1000 and the clamping mechanism 2000 are assembled together, the distal ends of the two clamp arms 2221 extend out of the tightening tube 2100 from the two channels 2104 at the distal end of the tightening tube 2100. When the operator applies a thrust to the traction mechanism 1000 at the proximal end of the traction mechanism 1000, the traction mechanism 1000 can drive the clamp assembly 2200 to move in a direction away from the proximal end of the tightening tube 2100 until the tube wall of the tightening tube 2100 does not apply pressure to the clamp arms 2221, and the two clamp arms 2221 move away from each other, so that the clamp body switches to the open state. When the operator applies a pulling force to the traction mechanism 1000 at the proximal end of the traction mechanism 1000, the traction mechanism 1000 can drive the clamp assembly 2200 to move in a direction close to the proximal end of the tightening tube 2100. During this process, when the wall of the tightening tube 2100 applies pressure to the clamping arms 2221, the two clamping arms 2221 move closer to each other to switch to the closed state. It can be understood that under the constraint of the third limiting portion, the clamp assembly 2200 basically moves along the axial direction of the tightening tube 2100 without circumferential rotation.

[0072] When the clamp assembly 2200 moves until the clamp block 2222 reaches the locking hole 2101, the clamp block 2222 falls into the locking hole 2101 (such as Figure 7 As shown). At this point, the clamp assembly 2200 is locked and cannot continue to make axial movement relative to the tightening tube 2100. Subsequently, the operator applies a pulling force to the proximal end of the traction mechanism 1000, and when the pulling force is greater than the first predetermined value, the interference fit force between the proximal end of the joint 2210 (specifically, the proximal end of the second connecting shaft 2213) and the inner hole 1001 can be overcome, so that the second connecting shaft 2213 is disengaged from the inner hole 1001 (as shown). Figure 6 As shown in the figure, the connection between the joint 2210 and the traction mechanism 1000 is released. It can be understood that the "thrust" refers to the direction of the force from the proximal end of the traction mechanism 1000 to the distal end, and the "pull" refers to the direction of the force from the distal end of the traction mechanism 1000 to the proximal end.

[0073] Next, please refer back to Figures 4 to 6 , and combined with Fig.13 and Fig.14The socket assembly 3000 includes a sleeve 3100 and an elastic connector 3200. The distal end of the sleeve 3100 is inserted into the first inner cavity of the tightening tube 2100 from the proximal end of the tightening tube 2100. Specifically, the sleeve 3100 includes a distal segment 3110 and a proximal segment 3120 connected to each other, and the outer diameter of the distal segment 3110 is smaller than the outer diameter of the proximal segment 3120, so that a step surface 3101 is formed on the outer wall of the sleeve 3100, and the distal segment 3110 can be inserted into the first inner cavity from the proximal end of the tightening tube 2100. The distal segment 3110 is also provided with a first through hole 3111. The elastic connector 3200 includes a base 3210 and a rod 3220, wherein the base 3210 is disposed in the second inner cavity of the sleeve 3100, and a second through hole 3211 is further disposed on the base 3210, the aperture of the second through hole 3211 being greater than or equal to the outer diameter of the core wire 1100 and smaller than the outer diameter of the connecting tube 1200, so that the base 3210 is sleeved on the core wire 1100. The rod 3220 is disposed on the surface of the base 3210 close to the distal end of the sleeve 3100, and the rod 3220 extends along the axial direction of the sleeve 3100. A second bending wing 3221 bent outwardly is formed at the distal end of the rod 3220, and the bending angle of the second bending wing 3221 is 90°-120° (the included angle between the second bending wing 3221 and the rod 3220). The second bending wing 3221 passes through the first through hole 3111 and extends to the outside of the sleeve 3100 to form a receiving groove with the step surface 3101 of the sleeve 3100. The receiving groove is used to cooperate with the fourth limiting portion of the tightening tube 2100 to achieve the connection between the tightening tube 2100 and the socket assembly 3000 (that is, when the tightening tube 2100 is connected to the socket assembly 3000, the fourth limiting portion is limited between the second bending wing 3221 and the step surface 3101). Then, when the second bending wing 3221 is deformed under the action of external force so that the angle between the second bending wing 3221 and the rod 3220 increases to a suitable angle, the second bending wing 3221 is separated from the first through hole 3111 from the inner side of the socket assembly 3000 to release the connection between the tightening tube 2100 and the socket assembly 3000.

[0074] Please focus on Figure 5When the traction mechanism 1000 moves toward the proximal end of the socket assembly 3000 along the axial direction of the socket assembly 3000 under the action of the pulling force to drive the engaging portion 2210 and the clamp assembly to move toward the proximal end of the tightening tube 2100, when the clamp block 2222 of the clamp assembly does not reach the locking hole 2101 of the tightening tube 2100, the first bending wing 1210 of the connecting tube 1200 abuts against the distal end surface of the socket assembly 3000 (specifically, the distal end surface of the sleeve 3100) to prevent the traction mechanism 1000 from further moving toward the proximal end of the socket assembly 3000, thereby preventing the clamp block 2222 from connecting with the locking hole 2101. In other words, the distal end surface of the socket assembly 3000 constitutes the first limiting portion, and the first bending wing 1210 constitutes the second limiting portion. When the traction mechanism 1000 is subjected to a pulling force greater than a second predetermined value, the first bending wing 1210 is deformed so that the angle formed between the first bending wing 1210 and the outer surface of the connecting tube 1200 increases until the distal end of the receiving assembly 3000 releases the restriction on the first bending wing 1210, so that the traction mechanism 1000 can continue to move toward the proximal end of the receiving assembly 3000. The second predetermined value is determined according to actual needs, but is usually smaller than the first predetermined value.

[0075] Further, please refer back to Fig.13 , and combined with Fig. 9 The socket assembly 3000 also includes a spring tube 3300, the distal end of which is connected to the proximal end of the sleeve 3100 (i.e., the proximal end of the proximal segment 3120), and a positioning tube 3310 is provided at the proximal end of the spring tube 3300. The cross-section of the positioning tube 3310 may be circular and is used to connect to the handle assembly 4000.

[0076] Next, please refer to Fig.15 The handle assembly 4000 includes a gripping portion 4100, a sliding portion 4200 and a rotating portion 4300. The gripping portion 4100 is provided with a slide groove 4110 extending in the axial direction, and the sliding portion 4200 is connected to the slide groove 4110 and can slide along the slide groove 4110. The rotating portion 4300 is rotatably disposed at the distal end of the gripping portion 4100. Please refer to Figure 1 and Figure 2, the proximal end of the traction mechanism 1000 (i.e., the proximal end of the core wire 1100) passes through the proximal end of the socket assembly 3000 (so that the first connection block 1300 is located at the distal end of the positioning tube 3310), and is respectively connected to the sliding portion 4200 and the rotating portion 4300 of the handle assembly 4000. So that the hemostatic clip can be configured such that when the sliding portion 4200 slides along the slide groove 4110, the sliding portion 4200 drives the traction mechanism 1000 to move along the axial direction of the socket assembly 3000. When the rotating portion 4300 rotates relative to the grip portion 4100, the rotating portion 4300 drives the traction mechanism 1000 to rotate.

[0077] Please combine Fig.10 and Fig.16 The rotating part 4300 is provided with a first limiting cavity 4301 and a second limiting cavity 4302, the sliding part 4200 is provided with a third limiting cavity 4201, and the first stopper 6301, the second limiting cavity 4302 and the third limiting cavity 4201 are connected to each other. The cross-sections of the first limiting cavity 4301 and the third limiting cavity 4201 include, but are not limited to, circular shapes. For example, the cross-section of the third limiting cavity 4201 can also be rectangular, and the cross-section of the second limiting cavity 4302 matches the cross-section of the first connecting block 1300. The positioning tube 3310 of the spring tube 3300 is disposed in the first limiting cavity 4301 and is configured to remain relatively stationary with the rotating part 4300 in the axial direction, and the rotating part 4300 can rotate relative to the positioning tube 3310 to prevent the socket assembly 3000 from generating torque as the traction mechanism 1000 rotates. The first positioning block 2300 of the traction mechanism 1000 is disposed in the second limiting cavity 4302, and is configured to be able to move axially in the second limiting cavity 4302, and also to be able to rotate synchronously with the rotating part 4300. The second positioning block 2400 of the traction mechanism 1000 is disposed in the third limiting cavity 4201, and is configured to remain relatively stationary with the sliding part 4200 in the axial direction, and to be able to rotate relative to the sliding part 4200 in the circumferential direction, so as to avoid torque when the traction mechanism 1000 rotates.

[0078] In this embodiment, the gripping portion 4100 , the sliding portion 4200 , and the rotating portion 4300 are preferably all assembled structures, so as to facilitate the assembly of the handle assembly 4000 , the traction mechanism 1000 , and the socket assembly 3000 .

[0079] The method for using the hemostatic clip is introduced below.

[0080] After delivering the hemostatic clip to the target position in the body, the operator manipulates the sliding portion 4200 of the handle assembly 4000 to slide in the slide groove 4110 to drive the traction mechanism 1000 to move along the axial direction of the sleeve assembly 3000, thereby driving the chuck assembly to move along the axial direction of the tightening tube 2100, and manipulates the rotating portion 4300 to drive the traction mechanism 1000 to rotate, thereby driving the chuck assembly to rotate, so as to adjust the position of the chuck assembly until the chuck assembly clamps the tissue at the target position. In this process, the operator controls the pulling force applied to the sliding portion 4200 so that the pulling force on the traction mechanism 1000 is less than the second predetermined value, and the distal end surface of the sleeve assembly 3000 can limit the first bending wing 1210 to prevent the block 2222 from connecting with the locking hole 2101. In this way, the operator can adjust the position of the chuck assembly repeatedly.

[0081] Next, the operator pulls back the sliding portion 4200 so that the traction mechanism 1000 drives the clamp assembly to move in a direction close to the proximal end of the tightening tube 2100 until the first bending wing 1210 abuts against the distal end surface of the socket assembly 3000 .

[0082] Next, the operator increases the pulling force to be greater than the second predetermined value, so that the first bending wing 1210 is deformed.

[0083] Then, the operator continues to pull back the sliding portion 4200 until the blocking block 2222 enters the locking hole 2101 .

[0084] Next, the operator increases the pulling force to be greater than the first predetermined value to overcome the interference fit force between the engaging portion 2210 and the inner hole 1001 , thereby releasing the connection between the engaging portion 2210 and the traction mechanism 1000 .

[0085] Next, the operator continues to pull back the sliding portion 4200 until the connecting tube 1200 abuts against the base 3210 of the elastic connecting member 3200. The operator then continues to apply a pulling force greater than a third predetermined value, and the connecting tube 1200 transmits the pulling force to the elastic connecting member 3200, so that the second bending wing 3221 is deformed, thereby releasing the connection between the socket assembly 3000 and the tightening tube 2100. The third predetermined value is determined as required.

[0086] Finally, the operator continues to pull back the sliding portion 4200 to withdraw the socket assembly 3000 and the traction mechanism 1000 from the body.

[0087] Although the present invention is disclosed as above, it is not limited thereto. Those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A hemostatic clip, It is characterized in that include: A traction mechanism, wherein the distal end of the traction mechanism is provided with an inner hole; as well as, The clamping mechanism comprises a tightening tube and a chuck assembly; the tightening tube is provided with a first locking portion; the chuck assembly is partially arranged inside the tightening tube and comprises a joint portion and a chuck body; the proximal end of the joint portion is inserted into the inner hole and has an interference fit with the inner hole; the chuck body is connected to the distal end of the joint portion, and the distal end of the chuck body extends from the distal end of the tightening tube; the chuck assembly is also provided with a second locking portion; The hemostatic clip is configured to allow the traction mechanism to drive the clamp assembly to reciprocate along the axial direction of the tightening tube under the action of external force when the second locking portion is separated from the first locking portion, so that the clamp body switches between an open state and a closed state; The hemostatic clip is further configured to prevent the chuck assembly from moving axially along the tightening tube when the chuck body is in the closed state and the second locking portion is connected to the first locking portion, and when the traction mechanism is subjected to a pulling force greater than a first predetermined value, the proximal end of the engagement portion is disengaged from the inner hole; The hemostatic clip also includes a sleeve assembly, which includes a sleeve, the distal end of the sleeve is inserted into the interior of the tightening tube from the proximal end of the tightening tube, and the distal end surface of the sleeve constitutes a first limiting portion; the distal end of the traction mechanism is provided with a first bending wing that bends toward the outside of the traction mechanism, the first bending wing is configured to be elastic and constitute a second limiting portion; the hemostatic clip is configured to prevent the clamp assembly from moving toward the proximal end of the tightening tube when the first bending wing abuts against the distal end surface of the sleeve, and the second locking portion is located on the distal side of the first locking portion to prevent the second locking portion from connecting with the first locking portion; when the traction mechanism is subjected to a pulling force greater than a second predetermined value, the first bending wing is deformed and allows the traction mechanism to drive the clamp assembly to move toward the proximal end of the tightening tube until the second locking portion is connected with the first locking portion; the second predetermined value is less than the first predetermined value.

2. The hemostatic clip according to claim 1, It is characterized in that The socket assembly is in communication with the tightening tube and is configured to be able to rotate relative to the tightening tube; the traction mechanism is partially disposed inside the socket assembly and is able to move along the axial direction of the socket assembly; The hemostatic clip is configured such that the traction mechanism drives the clamp assembly to rotate around the axis of the traction mechanism under the action of an external force, and the tightening tube rotates at the same time.

3. The hemostatic clip according to any one of claims 1 or 2, It is characterized in that The clamping mechanism also includes a third limiting portion, which is arranged on the tightening tube and located on the distal side of the engaging portion, and is used to restrict the maximum distance that the clamp assembly moves toward the distal end of the tightening tube to prevent the clamp assembly from escaping from the distal end of the tightening tube.

4. The hemostatic clip according to claim 3, It is characterized in that The first locking portion comprises a locking hole arranged on the side wall of the tightening tube; the second locking portion comprises a clamping block arranged on the surface of the chuck body on one side close to the inner wall of the tightening tube; The third limiting portion is also used to limit the relative position of the clamp assembly and the tightening tube in the circumferential direction so that the clamping block can be clamped into the locking hole.

5. The hemostatic clip according to claim 4, It is characterized in that The third limiting portion extends along the radial direction of the tightening tube and forms two channels with the tube wall of the tightening tube; The clamp body comprises two clamp arms arranged opposite to each other, and the distal ends of the two clamp arms pass through the two channels respectively and extend from the distal end of the tightening tube.

6. The hemostatic clip according to claim 5, It is characterized in that The third limiting portion includes a pin; or the third limiting portion includes two first retaining walls arranged at the distal end of the tightening tube, and the two first retaining walls are symmetrically arranged.

7. The hemostatic clip according to claim 1, It is characterized in that The receiving sleeve assembly also includes an elastic connector; the sleeve includes a distal segment and a proximal segment, the outer diameter of the distal segment is smaller than the outer diameter of the proximal segment, so that a step surface is formed on the outer wall of the sleeve; the distal segment is provided with a first through hole; the elastic connector includes a base and a rod, the base is arranged inside the sleeve, and a second through hole for the traction mechanism to pass through is opened on the base; the rod is arranged on a side of the base close to the distal end of the sleeve and extends along the axial direction of the sleeve, and a second bending wing is formed at the distal end of the rod; the second bending wing passes through the first through hole and extends to the outside of the sleeve to form a receiving groove with the step surface; A fourth limiting portion protruding inward is formed at the proximal end of the tightening tube, the proximal end of the tightening tube is sleeved on the distal end segment of the sleeve, and the fourth limiting portion is arranged at the accommodating groove.

8. The hemostatic clip according to claim 7, It is characterized in that The traction mechanism comprises a core wire and a connecting tube, wherein the connecting tube is arranged at the distal end of the core wire and has the inner hole; the core wire passes through the second through hole, the connecting tube is located at the distal end side of the base, and the outer diameter of the connecting tube is larger than the aperture of the second through hole; The hemostatic clip is configured such that when the proximal end of the engaging portion escapes from the inner hole and the proximal end of the connecting tube abuts against the base, the traction mechanism is subjected to a pulling force greater than a third predetermined value, so as to deform the second bending wing and release the connection between the socket assembly and the tightening tube.

9. The hemostatic clip according to claim 7, It is characterized in that The hemostatic clip further comprises a handle assembly, which comprises a gripping portion, a sliding portion and a rotating portion; the gripping portion is provided with a slide groove extending in the axial direction, the sliding portion is arranged on the slide groove and can slide along the slide groove; the rotating portion is rotatably arranged on the distal end of the gripping portion; the proximal end of the traction mechanism passes through the proximal end of the socket assembly and further extends into the interior of the handle assembly to be connected with the sliding portion and the rotating portion of the handle assembly; The hemostatic clip is configured such that when the sliding portion slides along the sliding groove, the sliding portion drives the traction mechanism to move axially along the sleeve assembly to drive the chuck assembly to move axially along the tightening tube; when the rotating portion rotates relative to the holding portion, the rotating portion drives the traction mechanism to rotate to drive the chuck assembly and the tightening tube to rotate.

10. The hemostatic clip according to claim 9, It is characterized in that The traction mechanism comprises a core wire, a connecting tube, a first connecting block and a second connecting block; wherein the connecting tube is arranged at the distal end of the core wire and has the inner hole; the first connecting block and the second connecting block are both arranged at the proximal end of the core wire, and the second connecting block is located at the proximal end side of the first connecting block; the first connecting block is connected to the rotating part and is configured to rotate synchronously with the rotating part and can move relative to the rotating part in the axial direction; the second connecting block is connected to the sliding part and is configured to remain relatively stationary with the sliding part in the axial direction and can rotate relative to the sliding part in the circumferential direction; and / or, The socket assembly also includes a spring tube, the distal end of which is connected to the proximal segment of the sleeve, and a positioning tube is provided at the proximal end of the spring tube; the positioning tube is connected to the rotating part of the handle assembly and is configured to remain relatively stationary with the rotating part in the axial direction and to be able to rotate relative to the rotating part in the circumferential direction.

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