Insertion type tissue clamping device and transmission piece thereof

Abstract

According to the plug-in type tissue clamping device and the transmission part thereof, in the plug-in type tissue clamping device, when a clamping part clamps large tissue or hard tissue, an operator can apply larger acting force to the clamping part through the transmission part. Before the clamping piece completes the expected meshing effect, the clamping and abutting part is always opposite to the limiting part and cannot move to the locking window, at the moment, even if larger force is applied to the transmission piece, due to the fact that the limiting part limits the clamping and abutting part, an integral transmission structure is always kept between the pull rod and the separation head, and the clamping and abutting part cannot move to the locking window. The pull rod can drive the separation head to continue to move towards the locking window until the clamping and abutting part also moves to the locking window, the butt joint can push the clamping and abutting part to move towards the two sides of the separation head, the butt joint can be disengaged from the butt joint groove, and the clamping and abutting part can be clamped into the locking window. After the plastically deformed clamping and abutting part is locked to the locking window, the clamping and abutting part cannot return and rebound, and it can be guaranteed that the clamping piece is in a reliable clamping and closing state all the time.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to an insertable tissue clamping device for surgery and the structure of a transmission member thereof. Background Art

[0002] An insertable tissue clamping device is an insertable medical device used to clamp tissues in the human or animal body to stop bleeding or close the body, including hemostatic clips, tissue clips, etc. For example, in the minimally invasive treatment of gastrointestinal diseases, the tissue clamping device is usually inserted into the instrument channel of an endoscope to achieve the purpose of treatment. For example, hemostatic clips (or tissue clips) have been widely used to stop bleeding or close gastrointestinal bleeding or trauma sites.

[0003] After the clamping part completes the clamping action, in order to remove the introduction part from the human body and retain the clamping part in the human body, the clamping part needs to be separated from the introduction part. In the prior art, the clamping part is detachably connected to the introduction part. Specifically, after the clamping part completes the clamping action, a certain amount of pulling force is applied by the introduction part. At this time, since the clamping part has completed the closing, the clamping part cannot produce any action, and because it bites the tissue in the body and cannot produce a large movement, the applied pulling force is concentrated on the connection between the clamping part and the introduction part. When the pulling force reaches or exceeds the separation critical value, not only can the introduction part be pulled apart from the clamping part, so that the clamping part remains in the body, but the introduction part can be withdrawn from the body. Moreover, the separated clamping part also needs to form a self-locking structure, and the self-locking structure is usually adaptively realized through structural changes after the clamping part completes the desired clamping action, that is, the clamping part needs to move to a set position before self-locking can be formed.

[0004] However, in actual operation, when the clamping part performs the clamping action in the human body, the clamping part may clamp a larger tissue or a harder tissue, making it difficult to continue the clamping action. At this time, the clamping part does not achieve the desired clamping effect, and the clamping part does not move to a position where it can form a self-locking. At this time, the only way is to continue to increase the pulling force and further control the clamping part to clamp the larger tissue or the harder tissue with a greater pulling force. However, often before the clamping part achieves the desired clamping effect on the larger tissue or the harder tissue, the pulling force has reached or exceeded the separation critical value, causing the clamping part to separate from the introduction part. However, in fact, the clamping action is not completed at this time, and the clamping part cannot achieve self-locking, resulting in the failure of the clamping operation. Utility Model Content

[0005] The present application provides an insertable tissue clamping device, which is used to solve the problem that existing insertable tissue clamping devices are difficult to successfully clamp larger tissues or harder tissues.

[0006] The present application provides a transmission member of an insertable tissue clipping device, which can be used in the insertable tissue clipping device to provide a new structure for separating a separation head from a pull rod.

[0007] Based on one of the above purposes, some embodiments of the present application provide an insertable tissue clamping device, including:

[0008] A clamping member for clamping and releasing tissue in a target subject;

[0009] A sleeve, wherein the body of the sleeve has a limiting portion and a locking window which are sequentially distributed in a direction away from the clamping member;

[0010] and a transmission member, wherein the transmission member comprises a separation head and a pull rod, the pull rod is used to be connected with a control handle, the separation head extends into the sleeve and is connected with the clamping member, the separation head and the pull rod form an integral transmission structure that can be separated from each other; the integral transmission structure is movably arranged relative to the sleeve, and the movement direction of the integral transmission structure relative to the sleeve includes a first direction and a second direction, when the integral transmission structure moves along the first direction, the clamping member is driven to be clamped; when the integral transmission structure moves along the second direction, the clamping member is driven to be opened;

[0011] The separation head has a docking groove and a clamping part which serves as a side groove wall of the docking groove and can move to both sides of the docking groove, and the clamping part is made of a material that can produce plastic deformation; the pull rod has a docking head, and the docking head is inserted into the docking groove;

[0012] When the clamping part is opposite to the limiting part, the limiting part is located outside the clamping part to limit the moving distance of the clamping part to both sides of the separation head, and the clamping part forms a limit on the butt joint to prevent the butt joint from being separated from the butt joint groove;

[0013] When the overall transmission structure moves along the first direction until the clamping portion is opposite to the locking window, the docking head can push the clamping portion to plastically deform toward both sides of the separation head, and the docking head can push the clamping portion to move toward both sides of the separation head to release the limitation of the clamping portion on the docking head, so that the docking head can be detached from the docking groove, and the clamping portion can be inserted into the locking window.

[0014] According to the insertable tissue clamping device provided in the above embodiment, it includes a clamping member, a sleeve and a transmission member. The transmission member is used to connect the control handle with the clamping member, so as to control the clamping and opening of the clamping member through the control handle. In the clamping device, the effect of releasing the overall transmission structure between the separation head and the pull rod is not only affected by the pulling force on the pull rod, but also by the positional relationship between the clamping part and the limiting part on the sleeve. When the clamping member clamps a larger tissue or a harder tissue, the operator can apply a greater force to the clamping member through the transmission member to control the clamping member to bite the larger tissue or the harder tissue more forcefully. The position of the clamping part in the sleeve is related to the degree of engagement of the clamping member. Before the clamping member completes the desired engagement effect, the clamping part is always opposite to the limiting part and cannot move to the locking window. At this time, even if the transmission member is exerted with a greater force, the clamping part is always in a state of preventing the butt joint from being separated from the butt joint groove due to the limiting part of the clamping part. The pull rod and the separation head always maintain an integral transmission structure. The pull rod can drive the separation head to continue to move to the locking window position until the desired clamping effect is completed. At this time, the clamping part also moves to the locking window, and the butt joint can push the clamping part to move to both sides of the separation head to release the limiting of the clamping part on the butt joint, so that the butt joint can be separated from the butt joint groove, and the clamping part can also be stuck in the locking window to lock the clamping member in the clamping state. At the same time, after the plastically deformed clamping part is locked to the locking window, no reset rebound will occur, which can ensure that the clamping member is always in a reliable clamping state.

[0015] In some embodiments, the docking groove has a main groove cavity and a disengagement groove connected to the main groove cavity, and the docking head has a head and a neck, the head is placed in the main groove cavity, and the neck is placed in the disengagement groove;

[0016] When the clamping portion is opposite to the limiting portion, under the restriction of the limiting portion, the cavity wall of the separation groove forms a limit on the head to prevent the head from being separated from the separation groove, so that the separation head and the pull rod maintain an integral transmission structure;

[0017] When the integral transmission structure moves along the first direction until the clamping portion is opposite to the locking window, the head can push the clamping portion to move toward both sides of the separation head to expand the width of the disengagement groove and disengage the head from the disengagement groove.

[0018] In some embodiments, the side wall of the head has a guide surface, and the guide surface is inclined toward the outside of the head along a direction from a side close to the neck to a side away from the neck.

[0019] In some embodiments, the main groove cavity and the head are mutually adapted trapezoidal, inverted trapezoidal, mushroom head-shaped, heart-shaped, square or triangular.

[0020] In some embodiments, the outer side of the clamping portion has a hook;

[0021] When the hook is opposite to the limiting portion, the limiting portion is located outside the hook to limit the moving distance of the hook to the two sides of the separation head;

[0022] When the integral transmission structure moves along the first direction until the hook is opposite to the locking window, the docking head can push the hook to move toward both sides of the separation head, and the hook is locked into the locking window.

[0023] In some embodiments, when the hook is engaged with the locking window, the hook surface of the hook forms a self-locking angle, so that in the axial direction of the sleeve, the outer end of the hook surface is closer to the clamping member than the inner end of the hook surface.

[0024] In some embodiments, the self-locking angle is 3°-7°.

[0025] In some embodiments, the separation head and the pull rod are connected to form the integral transmission structure via at least one connecting rib.

[0026] In some embodiments, the separation head includes a top and two clamping portions disposed on both sides of the top, with a gap left between the clamping portions; the top and the clamping portions surround the docking groove.

[0027] In some embodiments, at least one connecting rib is provided between the docking head and the top portion to connect the separation head and the docking head to form the integral transmission structure.

[0028] In some embodiments, the docking head has a neck, and at least one connecting rib is provided between the neck and the clamping portion to connect the separation head and the docking head to form the integral transmission structure.

[0029] In some embodiments, the connecting rib between the neck and the clamping portion is arranged in the transverse direction.

[0030] In some embodiments, the pull rod and the separation head are an integral transmission structure formed in one piece, or the pull rod and the separation head are an integral transmission structure fixedly connected.

[0031] In some embodiments, the pull rod is separately arranged from the separation head, and the docking groove limits the docking head to form the overall transmission structure.

[0032] In some embodiments, the clamping portion is made of a plastically deformable material, and when the overall transmission structure moves along the first direction until the clamping portion is opposite to the locking window, the docking head can push the clamping portion to plastically deform toward both sides of the separation head.

[0033] In some embodiments, the clamping portion is movably connected to other parts of the separation head, and when the overall transmission structure moves along the first direction until the clamping portion is opposite to the locking window, the docking head can push the clamping portion to move to both sides of the separation head.

[0034] Based on one of the above purposes, some embodiments of the present application provide a transmission member of an insertable tissue clipping device, including:

[0035] A pull rod, the pull rod being used to connect with the control handle;

[0036] and a separation head, the separation head being used to connect with the clamping member to transmit the movement of the pull rod to the clamping member;

[0037] The separation head and the pull rod form an integral transmission structure that can be separated from each other. The separation head has a docking groove and a clamping part that serves as a side groove wall of the docking groove and can move to both sides of the docking groove, and the clamping part has a hook; the pull rod has a docking head, and the docking head is inserted into the docking groove;

[0038] During the movement of the pull rod, the docking head can push the clamping part to move toward both sides of the separation head, so that the hook can be hooked and locked with the sleeve of the insertable tissue clamping device, and the clamping part can release the limit of the docking head, so that the docking head can be detached from the docking groove.

[0039] According to the transmission member provided in the above embodiment, the docking joint of the pull rod is inserted into the docking groove, and the clamping part serves as the side groove wall of the docking groove and can move to both sides of the docking groove. This structure enables the transmission member to form a limiting structure with the limiting part on the sleeve when it is applied to the sleeve of the inserted tissue clamping device, and then only when the clamping member completes the clamping operation and makes the clamping part opposite to the locking window, the docking joint can be disengaged from the docking groove, thereby releasing the overall transmission structure between the pull rod and the separation head, and realizing the clamping operation of larger tissues or harder tissues. In addition, the clamping part has a hook, which can be hooked and locked with the sleeve of the inserted tissue clamping device when the clamping part moves to both sides of the separation head, so that the clamping member remains in a locked state. After the plastically deformed clamping part is locked to the corresponding locking window, no reset rebound will occur, which can ensure that the clamping member is always in a reliable clamping state.

[0040] In some embodiments, the docking groove has a main groove cavity and a disengagement groove connected to the main groove cavity, and the docking head has a head and a neck, the head is placed in the main groove cavity, and the neck is placed in the disengagement groove;

[0041] During the movement of the pull rod, the head portion can push the clamping portion to move toward both sides of the separation head to expand the width of the disengagement slot and enable the head portion to disengage from the disengagement slot.

[0042] In some embodiments, the side wall of the head has a guide surface, and the guide surface is inclined toward the outside of the head along a direction from a side close to the neck to a side away from the neck.

[0043] In some embodiments, the main groove cavity and the head are mutually adapted trapezoidal, inverted trapezoidal, mushroom head-shaped, heart-shaped, square or triangular.

[0044] In some embodiments, it is characterized in that after the pull rod is separated from the separation head, the hook surface of the hook forms a self-locking angle.

[0045] In some embodiments, the self-locking angle is 3°-7°.

[0046] In some embodiments, the separation head and the pull rod are connected to form the integral transmission structure via at least one connecting rib.

[0047] In some embodiments, the separation head includes a top and two clamping portions disposed on both sides of the top, with a gap left between the clamping portions; the top and the clamping portions surround the docking groove.

[0048] In some embodiments, at least one connecting rib is provided between the docking head and the top portion to connect the separation head and the docking head to form the integral transmission structure.

[0049] In some embodiments, the docking head has a neck, and at least one connecting rib is provided between the neck and the clamping portion to connect the separation head and the docking head to form the integral transmission structure.

[0050] In some embodiments, the pull rod and the separation head are an integral transmission structure formed in one piece; or, the pull rod and the separation head are an integral transmission structure fixedly connected.

[0051] In some embodiments, the clamping portion is made of a plastically deformable material, and during the movement of the pull rod, the docking head can push the clamping portion to plastically deform toward both sides of the separation head.

[0052] In some embodiments, the clamping portion is movably connected to other parts of the separation head, and during the movement of the pull rod, the docking head can push the clamping portion to move toward both sides of the separation head. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1This is a schematic diagram of the appearance structure of an insertable tissue clamping device in an embodiment of the present application, in which the clamping member is in a fully closed state;

[0054] Figure 2 This is an exploded schematic diagram of an insertable tissue clamping device in one embodiment of the present application;

[0055] Figure 3 This is a schematic diagram of the structure of a transmission member in an embodiment of the present application;

[0056] Figure 4 This is a longitudinal cross-sectional view of an insertable tissue clamping device in one embodiment of the present application, in which the clamping portion and the limiting portion of the sleeve are opposite to each other;

[0057] Figure 5 This is a longitudinal cross-sectional view of an insertable tissue clamping device in one embodiment of the present application, in which the abutment pushes the clamping portion to move into the locking window;

[0058] Figure 6 This is a longitudinal cross-sectional view of an insertable tissue clamping device in one embodiment of the present application, at which time the clamping portion is locked with the locking window, and the pull rod is completely separated from the separation head;

[0059] Figure 7-12 Schematic diagrams of the shapes of the separation head and the pull rod in different embodiments;

[0060] Fig.13 This is an exploded schematic diagram of a rocker arm, a sliding block and a transmission member in one embodiment of the present application;

[0061] Fig.14 This is a partial enlarged cross-sectional view of the matching structure of the separation body and the pull rod in one embodiment of the present application, where the butt joint of the pull rod is restricted in the butt joint groove of the separation body;

[0062] Fig.15 This is a partially enlarged cross-sectional view of the matching structure of the separation body and the pull rod in one embodiment of the present application. At this time, the clamping part of the separation body pushed by the joint is plastically deformed. DETAILED DESCRIPTION

[0063] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0064] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0065] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0066] The present application provides an insertable tissue clamping device (hereinafter referred to as a clamping device for the convenience of description), which is used to clamp the body tissue of a person or an animal (collectively referred to as a target object) to achieve a hemostatic or closed effect, and may include but is not limited to a hemostatic clip, a tissue clip, etc. The clamping device may be a disposable device or a reusable device.

[0067] Please refer to Figure 1-3 In some embodiments, the clamping device 1 includes a clamping member 100, a sleeve 200 and a transmission member 300. Of course, the clamping device 1 may also include other components, such as a control handle, etc., as required. These structures may refer to the prior art.

[0068] The clamping member 100 is used to clamp and release tissue in the target object under the control of the operator. For example, the operator can control the action of the clamping member 100 by controlling a handle or other components. The number of the clamping member 100 can be more than one, and the clamping member 100 and the sleeve 200 can adopt various structures that can clamp and release tissue under the drive of the transmission member 300. For example, in Figure 1 and 2In the illustrated embodiment, the sleeve 200 and the clamping member 100 are integrally formed structures, and the clamping member 100 is provided with a plurality of slits 110. Through the deformation of the slits 110, the clamping member 100 can be bent inward or outward, thereby achieving a clamping and opening action. Of course, in other embodiments, the sleeve 200 can also be a separate structure from the clamping member 100, and the clamping member 100 can be arranged in the sleeve 200 and can extend from or retract into the sleeve 200, thereby achieving a clamping and opening action. The matching structure of the clamping member 100 and the sleeve 200 can refer to the existing structure, and no further explanation is given here.

[0069] Please refer to Figure 2 and 3 In some embodiments, the transmission member 300 has a separation head 310 and a pull rod 320. The separation head 310 and the pull rod 320 form an integral transmission structure that can be separated from each other. The integral transmission structure means that the separation head 310 and the pull rod 320 can transmit force and motion, and can move together as a whole within at least a certain stroke. The separation head 310 and the pull rod 320 can be integrally formed, fixedly connected or separated from each other, as long as a structure that can transmit force and motion can be formed. At the same time, the integral transmission structure can also separate the separation head 310 and the pull rod 320 from each other under the set conditions, thereby realizing the separation between the pull rod 320 and the clamp 100, so that the clamp 100 and the separation head 310 are left in the target object.

[0070] Please refer to Figure 4 The overall transmission structure is movably arranged relative to the sleeve 200, and the movement direction of the overall transmission structure relative to the sleeve 200 includes a first direction a1 and a second direction a2. When the overall transmission structure moves along the first direction a1, it drives the clamping member 100 to clamp; when the overall transmission structure moves along the second direction a2, it drives the clamping member 100 to open.

[0071] Specifically, the pull rod 320 is used to connect with the control handle, which can be achieved by various connection structures in the prior art, which can achieve the transmission of the motion and force input by the control handle to the pull rod 320. For example, please refer to Figure 1 and 2 In some embodiments, the end of the pull rod 320 away from the separation head 310 is connected to the control handle through a connecting tube 410. The end of the sleeve 200 away from the clamping member 100 may also be provided with a rotating sleeve 420 and a decoupling elastic member 430. The rotating sleeve 420 is installed on the sleeve 200 through the decoupling elastic member 430, and the pull rod 320 penetrates the rotating sleeve 420 and the sleeve 200.

[0072] Please refer to Figure 4The separation head 310 extends into the sleeve 200 and is connected to the clamping member 100. The connection between the separation head 310 and the clamping member 100 can be a direct connection or an indirect connection, and its purpose is to drive the clamping member 100 to close and open through the movement of the separation head 310. For example, please refer to Figure 2 and 4 In some embodiments, the clamping device 1 further includes a pair of rocker arms 510, a sliding block 520 and a rocker arm shaft 530. The separation head 310 is connected to the sliding block 520, which may be fixedly connected or connected by other structures that can drive the sliding block 520 to move axially along the sleeve 200 along with the separation head 310. Specifically, in some embodiments, please refer to Figure 4 and 13 The sliding block 520 can be divided into a first sliding block 521 and a second sliding block 522. The first sliding block 521 and the second sliding block 522 are processed separately and can be assembled into a whole sliding block 520. Fig.13 As shown, in this embodiment, the first sliding block 521 and the second sliding block 522 respectively have a cavity 523 ( Fig.13 Only the cavity 523 on the first sliding block 521 is shown, and the second sliding block 522 also has a similarly adapted cavity 523). After the first sliding block 521 and the second sliding block 522 are assembled into the sliding block 520, an assembly cavity 524 is formed (such as Figure 4 As shown in FIG. 5 , the separation head 310 can be fixedly installed in the assembly cavity 524 to achieve a fixed connection between the separation head 310 and the sliding block 520. Of course, in other embodiments, the separation head 310 and the sliding block 520 can also be fixedly connected or transmission-connected in other ways.

[0073] The pair of rocker arms 510 are connected to the pair of clamping members 100 in a one-to-one correspondence, that is, one rocker arm 510 is connected to one clamping member 100. The rocker arm 510 is also rotatably connected to the sliding block 520. The movement of the transmission member 300 and the sliding block along the axial direction of the sleeve 200 can be divided into a first direction a1 and a second direction a2 (such as Figure 4As shown in the figure, when the transmission member 300 and the slider move along the first direction a1, the pair of rocker arms 510 can drive the pair of clamping members 100 to move closer to each other to form a clamping action; when the transmission member 300 and the sliding block 520 move along the second direction a2, the pair of rocker arms 510 can drive the pair of clamping members 100 to move away from each other to achieve an opening action. Of course, this embodiment only shows a way in which the separation head 310 is used to drive the clamping member 100 to clamp and open. In other embodiments, the separation head 310 can also be connected to the clamping member 100 through other structures, thereby achieving the purpose of the separation head 310 driving the clamping member 100 to clamp and open. For example, various transmission members (called unhooking pieces or other names in some prior arts) and the transmission structure of the clamping member 100 in the prior art can be applied to this purpose.

[0074] Please refer to Figure 1-4 In some embodiments, the barrel of the sleeve 200 has a limiting portion 210 and a locking window 220 that are sequentially distributed along a direction away from the clamping member 100. The separation head 310 has a docking groove 311 and a pair of clamping portions 312 that serve as side groove walls of the docking groove 311 and can move to both sides of the docking groove 311. The pull rod 320 has a docking joint 321, and the docking joint 321 is inserted into the docking groove 311. The clamping portion 312 serves as a side groove wall of the docking groove 311, and it encloses a portion of the space of the docking groove 311. When there is an external structure to limit the movement of the clamping portion 312 to the outside or when the clamping portion 312 is supported by its own material strength, the clamping portion 312 can also limit the docking joint 321 to prevent the docking joint 321 from detaching from the docking groove 311 under unexpected circumstances, for example Figure 4 Moreover, the clamping portion 312 can move toward both sides of the docking groove 311 when the external structural restriction is released or when a force exceeding the material strength of the clamping portion 312 is applied to the docking joint 321, thereby achieving the purpose of releasing the docking joint 321, for example Figure 5 and 6 The clamping portion 312 can move to both sides of the docking groove 311 in at least one of the following ways, including but not limited to:

[0075] In some embodiments, the clamping portion 312 is a plastic deformation material (such as a plastic metal material (stainless steel 304 / 316 or other plastic metals) and other plastic deformation materials, etc.), and when the overall transmission structure moves along the first direction a1 until the clamping portion 312 is opposite to the locking window 220, the docking head 321 can push the clamping portion 312 to plastically deform toward both sides of the separation head 310. After the plastically deformed clamping portion 312 is locked to the locking window 220, no reset rebound occurs, which can ensure that the clamping member 100 is always in a reliable clamping state.

[0076] Please refer to Fig.14 and15 In some embodiments where the clamping portion 312 is made of a plastic deformation material, in order to better control the clamping portion 312 to perform plastic deformation as expected, the clamping portion 312 may have a bending portion 3123, so that when the docking joint 321 can push the clamping portion 312 to plastically deform toward both sides of the separation head 310, the clamping portion 312 is mainly bent and deformed at the bending portion 3123 to move toward both sides of the separation head 310.

[0077] For further information, please refer to Fig.14 and 15 In some embodiments, in the axial direction of the sleeve 200, the transverse width of the bent portion 3123 on the clamping portion 312 is smaller than the transverse width of other regions, so as to ensure that the plastic deformation of the clamping portion 312 is mainly concentrated at the bent portion 3123, so that the bent portion 3123 is deformed first. In addition, the transverse width of other regions (such as the position of the hook 3121) is larger than the bent portion 3123, which can also ensure that when the joint 321 can push the clamping portion 312, it will not cause much plastic deformation in other regions, thereby affecting the locking effect of the clamping portion 312 and the locking window 220.

[0078] In order to realize that when the butt joint 321 can push the clamping portion 312, the deformation of the clamping portion 312 is concentrated at the root of the clamping portion 312, in some embodiments, please refer to Fig.14 and 15 , the bending portion 3123 is located at the connection between the clamping portion 312 and the top portion 313. Of course, the bending portion 3123 can also be set at other positions of the clamping portion 312.

[0079] In other embodiments, the clamping portion 312 is movably connected (such as a rotational connection) relative to other parts of the separation head 310 (such as the top 313 of the separation head 310 mentioned later), and when the overall transmission structure moves along the first direction a1 until the clamping portion 312 is opposite to the locking window 220, the docking head 321 can push the clamping portion 312 to move toward both sides of the separation head 310.

[0080] In addition, the clamping portion 312 can also move toward the two sides of the docking groove 311 in other ways.

[0081] Please refer to Figure 4In some embodiments, when the clamping portion 312 in the sleeve 200 is opposite to the limiting portion 210 (for example, in the normal state, when the transmission member 300 drives the clamping member 100 to open, and when the transmission member 300 drives the clamping member 100 to clamp but does not reach the set clamping position), the limiting portion 210 is located outside the clamping portion 312 to limit the moving distance of the clamping portion 312 to both sides of the separation head 310. At this time, the clamping portion 312 cannot move outward or can only move a certain distance, which is not enough to cause the butt joint 321 to disengage from the butt joint groove 311. At this time, since the clamping portion 312 cannot move outward, the clamping portion 312 forms a limit on the butt joint 321 to prevent the butt joint 321 from disengaging from the butt joint groove 311.

[0082] Please refer to Figure 5 In some embodiments, when the overall transmission structure moves along the first direction a1, the clamping member 100 can be driven to perform a clamping operation. When the overall transmission structure moves along the first direction a1 until the clamping portion 312 is opposite to the locking window 220, the clamping member 100 has been clamped to the position desired by the operator, that is, the clamping effect is achieved. At this time, since the limiting effect of the limiting portion 210 on the clamping portion 312 is lost, the butt joint 321 can push the clamping portion 312 to move to both sides of the separation head 310 to release the limiting effect of the clamping portion 312 on the butt joint 321, so that the butt joint 321 can be separated from the docking groove 311, and the effect of the overall transmission structure between the separation head 310 and the pull rod 320 is released, and the pull rod 320 is separated from the separation head 310. At the same time, when the clamping portion 312 moves outward, it can be stuck in the locking window 220 to lock the clamping member 100. After separating from the separation head 310 , the pull rod 320 continues to move along the first direction a1 and contacts the unhooking elastic member 430 . Under the pulling force, the pull rod 320 drives the unhooking elastic member 430 and the rotating sleeve 420 to separate from the sleeve 200 and be taken out of the target object together.

[0083] In the clamping device 1 provided in the above embodiment, the effect of releasing the integral transmission structure between the separation head 310 and the pull rod 320 is not only affected by the pulling force on the pull rod 320, but also by the positional relationship between the clamping portion 312 and the limiting portion 210 on the sleeve 200. When the clamping member 100 clamps a larger tissue or a harder tissue, the operator can apply a greater force to the clamping member 100 through the transmission member 300 to control the clamping member 100 to bite the larger tissue or the harder tissue more forcefully. The position of the clamping portion 312 in the sleeve 200 is related to the degree of engagement of the clamping member 100. Before the clamping member 100 achieves the desired engagement effect, the clamping portion 312 is always opposite to the limiting portion 210 and cannot move to the locking window 220. At this time, even if a greater force is applied to the transmission member 300, the limiting portion 210 on the clamping portion 312 makes the clamping portion 312 always in a state of preventing the butt joint 321 from being separated from the butt joint groove 311, and the pull rod 320 and the separation head 310 are always kept in an integral manner. The pull rod 320 can drive the separation head 310 to continue to move toward the locking window 220 until the desired clamping effect is achieved. At this time, the clamping portion 312 also moves to the locking window 220, and the docking joint 321 can push the clamping portion 312 to move to both sides of the separation head 310 to release the limit of the clamping portion 312 on the docking joint 321, so that the docking joint 321 can be disengaged from the docking groove 311, and the clamping portion 312 can also be stuck in the locking window 220 to lock the clamping member 100 in the clamped state.

[0084] For further information, please refer to Figure 3 and 4 In some embodiments, in order to form the aforementioned integral transmission structure between the separation head 310 and the pull rod 320, the docking groove 311 has a main groove cavity 3111 and a disengagement groove 3112 connected to the main groove cavity 3111, and the docking head 321 has a head 3211 and a neck 3212, the head 3211 is placed in the main groove cavity 3111, and the neck 3212 is placed in the disengagement groove 3112. When the clamping portion 312 is opposite to the limiting portion 210, under the restriction of the limiting portion 210, the cavity wall of the disengagement groove 3112 forms a limit on the head 3211 to prevent the head 3211 from disengaging from the disengagement groove 3112, so that the separation head 310 and the pull rod 320 maintain an integral transmission structure. Please refer to Figure 5 and 6 When the overall transmission structure moves along the first direction a1 until the clamping portion 312 is opposite to the locking window 220, the head 3211 can push the clamping portion 312 to move toward both sides of the separation head 310 to expand the width of the escape groove 3112 and allow the head 3211 to escape from the escape groove 3112.

[0085] Please refer to Figure 3 and 4In some embodiments, the lateral width of at least part of the head 3211 is greater than the lateral width of the escape groove 3112 to ensure that the head 3211 cannot escape from the escape groove 3112 before the escape groove 3112 expands in width. The lateral width of the neck 3212 is smaller than the lateral width of the escape groove 3112 so that it can be accommodated in the escape groove 3112. The main groove cavity 3111 has a space size that can accommodate the head 3211. Of course, in some embodiments, the shape of the main groove cavity 3111 can match the shape of the head 3211 so that the two can fit as closely as possible to prevent the head 3211 from shaking too much in the main groove cavity 3111 and affecting the operation. The lateral width mentioned in this embodiment refers to the cross section passing through the axis of the sleeve 200 and the locking window 220 at the same time (such as Figure 4 The width of each component in a direction perpendicular to the axial direction of the sleeve 200 (i.e. Figure 4 The dimension in the left-right direction is the lateral width.) The lateral width may of course also be defined by other names.

[0086] Please refer to Figure 5 In some embodiments, in order to push the clamping portion 312 to move more smoothly when the docking head 321 is separated from the docking groove 311, the side wall of the head 3211 has a guide surface 3213, and the guide surface 3213 is inclined toward the outside of the head 3211 along the direction from the side close to the neck 3212 to the side away from the neck 3212. When the pull rod 320 moves along the first direction a1, the clamping portion 312 can gradually move or deform outward along the guide direction of the guide surface 3213, thereby increasing the width of the separation groove 3112.

[0087] Of course, in other embodiments, the guide surface 3213 may also be designed to be other shapes with a guiding function, or the guide surface 3213 may not be provided.

[0088] Furthermore, the main groove cavity 3111 and the head 3211 can be designed into any feasible shapes respectively, under the premise that the clamping portion 312 can limit the docking joint 321 to prevent the docking joint 321 from detaching from the docking groove 311 when it is unexpected, and that the docking joint 321 can move outward as the pull rod 320 drives the clamping portion 312 when the clamping portion 312 is opposite to the locking window 220.

[0089] For example, in some embodiments, the main groove cavity 3111 and the head 3211 are shaped like a trapezoid, an inverted trapezoid, a mushroom head, a heart, a square, a triangle or other shapes. Figure 4-6 as well as Figure 7-10 In some embodiments, the head 3211 is designed to be heart-shaped. Fig.11In some embodiments, the head 3211 is designed to be an inverted trapezoid. Fig.12 In some embodiments, the head 3211 is designed to be mushroom-shaped. Figure 4-6 as well as Fig.11 , 12 In some embodiments, the main groove cavity 3111 is designed to have an inverted trapezoidal shape. Figure 7 and 8 In some embodiments, the main slot cavity 3111 is designed to be a square with rounded corners. Fig. 9 and 10 In some embodiments, the main groove cavity 3111 is designed to be heart-shaped.

[0090] Of course, in some embodiments, the main groove cavity 3111 and the head 3211 are mutually adapted shapes, for example Figure 9-11 In the embodiment shown, when the main groove cavity 3111 and the head 3211 are mutually adapted, even if the pull rod 320 and the separation head 310 are not integrally formed or fixedly connected, the movement of the pull rod 320 can drive the separation head 310 to move more synchronously.

[0091] Furthermore, when forming an integral transmission structure, the pull rod 320 and the separation head 310 may be an integrally formed structure, a fixedly connected structure, or a structure that is separated from each other but can move together due to structural restrictions.

[0092] Please refer to Figure 3 as well as Figure 7-12 In some embodiments, the separation head 310 and the pull rod 320 are connected to form an integral transmission structure through at least one connecting rib 301, 302. The connecting ribs 301, 302 are used to connect the separation head 310 and the pull rod 320 as a whole, and the whole can be an integrally formed whole or a whole formed by a fixed connection. When the separation head 310 and the pull rod 320 are connected as a whole through the connecting ribs 301, 302, the movement between the pull rod 320 and the separation head 310 can be reduced, and the displacement between the pull rod 320 and the separation head 310 and the like can be avoided during the installation and operation of the clamp 100. The connecting ribs 301, 302 can be arranged between any part of the separation head 310 and the pull rod 320. The connecting ribs 301, 302 are designed to be torn by the external force applied by the operator when the pull rod 320 moves along the first direction a1, so as to ensure that after the clamping member 100 completes the clamping operation, the separation head 310 and the pull rod 320 can be separated by tearing the connecting ribs 301, 302.

[0093] Please refer to Figure 3 as well as Figure 7-12In some embodiments, the separation head 310 includes a top 313 and two clamping portions 312 disposed on both sides of the top 313, with a gap left between the clamping portions 312, and the gap forms a disengagement groove 3112. The top 313 and the clamping portions 312 surround the docking groove 311 shown in the above embodiment. In some embodiments, at least one connecting rib 301 is disposed between the docking joint 321 and the top 313 of the separation head 310 to connect the separation head 310 and the docking joint 321 into an integral transmission structure. By disposing the connecting rib 301 between the docking joint 321 and the top 313 of the separation head 310, it can be ensured that the docking joint 321 and the separation head 310 are better aligned in the axial direction of the sleeve 200.

[0094] Please refer to Figure 3 as well as Figure 7-8 In some embodiments, at least one connecting rib 302 is provided between the neck 3212 and the clamping part 312 of the butt joint 321 to connect the separation head 310 and the butt joint 321 into an integral transmission structure. By providing the connecting rib 302 between the neck 3212 and the clamping part 312, the separation head 310 and the pull rod 320 can be ensured to be stable in the lateral direction, reducing transmission and displacement. Figure 3 as well as Figure 7-8 In the embodiment, each clamping portion 312 is provided with a connecting rib 302 between the clamping portion 312 and the neck portion 3212 to ensure that the clamping portion 312 and the neck portion 3212 are firmly positioned. Moreover, in the structure with the connecting rib 302, the connecting rib 302 can increase the release force. When the pull rod 320 is pulled to break the connecting rib 302, not only a breaking sound can be emitted, but also an obvious breaking feel can be provided, thereby prompting the operator to separate the pull rod 320 from the separation head 310. Of course, in other embodiments, the connecting rib 302 can also be provided between the clamping portion 312 and other positions of the pull rod 320 except the neck portion 3212, such as Fig. 9 In the illustrated embodiment, the connecting rib 302 is disposed on a shoulder 322 of the pull rod 320 , and the shoulder 322 is located below the neck 3212 .

[0095] Please refer to Figure 3 as well as Figure 7-9 In some embodiments, at least one connecting rib 301 is provided between the butt joint 321 and the top 313 of the separation head 310, and at least one connecting rib 302 is provided between the butt joint 321 and the clamping portion 312. By providing the connecting ribs 301 and 302 at at least two different positions in the axial direction of the pull rod 320, a secondary separation structure is formed while ensuring a reliable connection between the pull rod 320 and the separation head 310. The release feel generated in this structure is clear and the force value is stable.

[0096] Specifically, please refer to Figure 3 and 4When the transmission member 300 moves along the first direction a1 in the sleeve 200, the pull rod 320 is subjected to the pulling force of the separation head 310. When the connecting rib 301 between the docking joint 321 and the top 313 of the separation head 310 reaches the yield limit, the connecting rib 301 breaks (this state is called primary separation). At the same time, the docking joint 321 continues to move downward under the force and squeezes the clamping portion 312. If the separation head 310 is still in the sleeve 200 at this time and has not reached the locking window 220, the clamping portion 312 is subject to the restraining force of the upper limit portion 210 of the sleeve 200, which makes it unable to deform. When the connecting rib 302 between the clamping portion 312 and the pull rod 320 reaches the yield limit, the connecting rib 302 breaks and the docking joint 321 moves downward. At this time, the clamping portion 312 is squeezed by the docking joint 321 and changes its position (this state is called secondary separation). At this time, the clamping portion 312 is at the locking window 220. When the docking joint 321 is detached, the position change distance of the clamping portion 312 is the largest and it is no longer constrained by the sleeve 200, and is hooked and fixed with the locking window 220.

[0097] Of course, in other embodiments, the connecting rib 301 between the butt joint 321 and the top 313 of the separation head 310 and the connecting rib 302 between the butt joint 321 and the clamping portion 312 may also be used selectively, for example, Figure 10-12 In the illustrated embodiment, the connecting rib 301 is only provided between the butt joint 321 and the top 313 of the separation head 310 .

[0098] For further information, please refer to Figure 3 and 7 In some embodiments, the connecting rib 302 between the neck 3212 and the clamping portion 312 is arranged in the transverse direction. The extending direction of the connecting rib 302 is perpendicular to the first direction a1 or at a certain angle. When the pull rod 320 moves along the first direction a1, the connecting rib 302 can be torn more easily, which is more convenient for the operator to operate.

[0099] For further information, please refer to Figure 2In some embodiments, the integral transmission structure is cut on the same substrate using a laser cutting process. The integral transmission structure is formed by processing the pull rod 320 and the separation head 310 (or the entire transmission member 300) from the same material, rather than being assembled from two or more parts. The integral transmission structure can be made by, but not limited to, injection molding, laser cutting and other mechanical processing techniques. In particular, when laser cutting is used, processing of extremely small gaps can be achieved, which is beneficial to the miniaturization of the overall structure and improving the compactness of the structure. In particular, when a connecting rib is provided between the pull rod 320 and the separation head 310, a small amount of material can be reserved during laser cutting to form the connecting rib, and the processing is very simple and convenient. In addition, the pull rod 320 and the separation head 310 can also be fixed as one by means of clamping, welding, bonding, screw locking, riveting, etc.

[0100] In addition, in some embodiments, the pull rod 320 and the separation head 310 can also be separated, and there is no direct connection between the two, but through the mutual limitation of the docking groove 311 and the docking head 321, an overall transmission structure is formed. When the docking groove 311 and the docking head 321 form mutual limitations in the first direction a1 and the second direction a2, the movement of the pull rod 320 along the first direction a1 and the second direction a2 can also drive the separation head 310 to move along the first direction a1 and the second direction a2. Specifically, Figure 9-10 On the basis of the illustrated embodiment, the connecting rib 301 may be omitted, and the pull rod 320 and the separation head 310 can be moved along the first direction a1 and the second direction a2 by relying on the mutual limitation between the docking groove 311 and the docking head 321 .

[0101] For further information, please refer to Figure 6 In some embodiments, in order to better lock the clamping portion 312 with the locking window 220, the outer side of the clamping portion 312 has a hook 3121. When the hook 3121 is opposite to the limiting portion 210, the limiting portion 210 is located on the outer side of the hook 3121 to limit the moving distance of the hook 3121 to the two sides of the separation head 310. When the overall transmission structure moves along the first direction a1 until the hook 3121 is opposite to the locking window 220, the docking head 321 can push the hook 3121 to move to the two sides of the separation head 310, and the hook 3121 is locked in the locking window 220.

[0102] For further information, please refer to Figure 6In some embodiments, when the hook 3121 is hooked with the locking window 220, the hook surface 3122 of the hook 3121 forms a self-locking angle A, so that in the axial direction of the sleeve 200, the outer end of the hook surface 3122 is closer to the clamp 100 than the inner end of the hook surface 3122. The self-locking angle A can enhance the locking force when the outer end of the hook 3121 is hooked with the locking window 220, and achieve a more secure self-locking effect. In some embodiments, the self-locking angle A is 3°-7° (including both ends), for example, it can be 4°-6° (including both ends).

[0103] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. An insertable tissue clamping device, characterized in that: include: A clamping member for clamping and releasing tissue in a target subject; A sleeve, wherein the body of the sleeve has a limiting portion and a locking window which are sequentially distributed in a direction away from the clamping member; and a transmission member, wherein the transmission member comprises a separation head and a pull rod, the pull rod is used to be connected with a control handle, the separation head extends into the sleeve and is connected with the clamping member, the separation head and the pull rod form an integral transmission structure that can be separated from each other; the integral transmission structure is movably arranged relative to the sleeve, and the movement direction of the integral transmission structure relative to the sleeve includes a first direction and a second direction, when the integral transmission structure moves along the first direction, the clamping member is driven to be clamped; when the integral transmission structure moves along the second direction, the clamping member is driven to be opened; The separation head has a docking groove and a clamping part which serves as a side groove wall of the docking groove and can move to both sides of the docking groove, and the clamping part is made of a material that can produce plastic deformation; the pull rod has a docking head, and the docking head is inserted into the docking groove; When the clamping part is opposite to the limiting part, the limiting part is located outside the clamping part to limit the moving distance of the clamping part to both sides of the separation head, and the clamping part forms a limit on the butt joint to prevent the butt joint from being separated from the butt joint groove; When the overall transmission structure moves along the first direction until the clamping portion is opposite to the locking window, the docking head can push the clamping portion to plastically deform toward both sides of the separation head to release the limiting effect of the clamping portion on the docking head, so that the docking head can be disengaged from the docking groove and the clamping portion can be inserted into the locking window.

2. The insertable tissue clipping device according to claim 1, characterized in that: The docking groove has a main groove cavity and a disengagement groove communicated with the main groove cavity, and the docking head has a head and a neck, the head is placed in the main groove cavity, and the neck is placed in the disengagement groove; When the clamping portion is opposite to the limiting portion, under the restriction of the limiting portion, the cavity wall of the separation groove forms a limit on the head to prevent the head from being separated from the separation groove, so that the separation head and the pull rod maintain an integral transmission structure; When the integral transmission structure moves along the first direction until the clamping portion is opposite to the locking window, the head can push the clamping portion to move toward both sides of the separation head to expand the width of the disengagement groove and disengage the head from the disengagement groove.

3. The insertable tissue clamping device according to claim 2, characterized in that: The side wall of the head has a guide surface, and the guide surface is inclined toward the outside of the head along a direction from a side close to the neck to a side away from the neck.

4. The insertable tissue clipping device according to claim 1, characterized in that: The outer side of the clamping part is provided with a hook; When the hook is opposite to the limiting portion, the limiting portion is located outside the hook to limit the moving distance of the hook to the two sides of the separation head; When the integral transmission structure moves along the first direction until the hook is opposite to the locking window, the docking head can push the hook to move toward both sides of the separation head, and the hook is locked into the locking window.

5. The insertable tissue clipping device according to claim 4, characterized in that: When the hook is hooked with the locking window, the hook surface of the hook forms a self-locking angle, so that in the axial direction of the sleeve, the outer end of the hook surface is closer to the clamping member than the inner end of the hook surface.

6. The insertable tissue clipping device according to claim 1, characterized in that: The separation head and the pull rod are connected to form the integral transmission structure via at least one connecting rib.

7. The insertable tissue clipping device according to claim 1, characterized in that: The separation head comprises a top and two clamping parts respectively arranged on both sides of the top, with a gap being left between the clamping parts; the top and the clamping parts enclose the docking groove.

8. The insertable tissue clipping device according to claim 7, characterized in that: At least one connecting rib is provided between the butt joint and the top portion to connect the separation head and the butt joint to form the integral transmission structure.

9. The insertable tissue clipping device according to claim 7, characterized in that: The butt joint has a neck portion, and at least one connecting rib is arranged between the neck portion and the clamping portion to connect the separation head and the butt joint to form the integral transmission structure.

10. The insertable tissue clipping device according to any one of claims 1 to 9, characterized in that: The pull rod and the separation head are an integral transmission structure formed in one piece, or the pull rod and the separation head are an integral transmission structure fixedly connected.

11. The insertable tissue clipping device according to any one of claims 1 to 5, characterized in that: The pull rod is separately arranged from the separation head, and the integral transmission structure is formed by limiting the position of the butt joint by the butt joint groove.

12. A transmission member of an insertable tissue clamping device, characterized in that: include: A pull rod, the pull rod being used to connect with the control handle; and a separation head, the separation head being used to connect with the clamping member to transmit the movement of the pull rod to the clamping member; The separation head and the pull rod form an integral transmission structure that can be separated from each other. The separation head has a docking groove and a clamping part that serves as a side groove wall of the docking groove and can move to both sides of the docking groove. The clamping part is made of a material that can produce plastic deformation. The pull rod has a docking head, and the docking head is inserted into the docking groove. During the movement of the pull rod, the docking joint can push the clamping part to plastically deform toward both sides of the separation head, thereby releasing the limiting effect of the clamping part on the docking joint, so that the docking joint can be detached from the docking groove; the clamping part has a hook, which is used to hook and lock with the sleeve of the insertable tissue clamping device when the clamping part moves toward both sides of the separation head.

13. The transmission member according to claim 12, characterized in that: The docking groove has a main groove cavity and a disengagement groove communicated with the main groove cavity, and the docking head has a head and a neck, the head is placed in the main groove cavity, and the neck is placed in the disengagement groove; During the movement of the pull rod, the head portion can push the clamping portion to move toward both sides of the separation head to expand the width of the disengagement slot and enable the head portion to disengage from the disengagement slot.

14. The transmission element according to any one of claims 12 to 13, characterized in that: After the pull rod is separated from the separation head, the hook surface of the hook forms a self-locking angle.

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