Pull-type single-arm clamp

Abstract

A traction-type single-arm clamp has a clamping assembly that is an integrally formed cylindrical structure. This cylindrical structure is divided into at least two opposing fixed arms and a movable arm. The movable arm has an integrally formed flexible portion, which allows the movable arm to open and close relative to the fixed arm. When the fixed arm and the movable arm each have a first clamping head and a second clamping head, these heads can clamp the tissues on both sides of the wound, aiding in wound suturing and healing. The entire clamping assembly is a single component, making it simpler and easier to manufacture compared to existing clamping structures.

Description

Technical Field

[0001] This application relates to the field of medical devices, specifically to a clamping assembly for a traction-type single-arm clamp. Background Technology

[0002] With the iterative advancements in endoscopic technology, minimally invasive treatment methods have gradually replaced some traditional open surgeries. Early gastrointestinal lesions that previously required open surgery or laparoscopy can now be precisely intervened through minimally invasive endoscopic techniques. Their core advantages lie in controllable tissue damage, shorter postoperative recovery periods, and improved efficiency in the utilization of medical resources.

[0003] Single-arm clamps are a common closure device used clinically for intracavitary wounds. They typically have a fixed arm and a movable arm. The fixed arm remains stationary, while the movable arm moves to open and close the wound, thus providing a certain hooking effect on the tissues on both sides of the wound. However, existing single-arm clamps have many clamping components and a complex structure, requiring further optimization. Utility Model Content

[0004] This application provides a pull-type single-arm clamp to demonstrate a clamping assembly with fewer parts and a simpler structure.

[0005] To achieve one of the above objectives, some embodiments of this application provide a pull-type single-arm clamp, including:

[0006] A clamping assembly, wherein the clamping assembly is an integrally formed cylindrical structure that forms an assembly cavity, the cylindrical structure having a fixed arm and a movable arm disposed opposite to each other, the fixed arm having a first clamping head, the movable arm having a bendable portion and a second clamping head, the bendable portion being able to bend under external force so that the second clamping head can open and close relative to the first clamping head;

[0007] A motion conversion assembly, at least partially located within the assembly cavity, having a disengagement portion and a retention portion for retention within the patient along with the clamping assembly, the disengagement portion being connected to the retention portion in a manner that allows it to disengage from the retention portion during its rearward movement, the retention portion being connected to the movable arm to transmit a force to the movable arm that drives the movable arm to move relative to the fixed arm;

[0008] The control component is connected to the clamping component in such a way that it can disengage from the clamping component during its rearward movement; the control component is also connected to the disengaging portion to drive the retaining portion and the disengaging portion to move in the front-back direction.

[0009] In the aforementioned traction-type single-arm clamp, its clamping assembly is a one-piece molded cylindrical structure. This cylindrical structure is divided into at least a fixed arm and a movable arm arranged opposite each other. The movable arm has an one-piece molded flexible portion, which allows the movable arm to open and close relative to the fixed arm. When the fixed arm and the movable arm each have a first clamping head and a second clamping head, the tissues on both sides of the wound can be clamped using these first and second clamping heads, aiding in wound suturing and healing. The entire clamping assembly is a single part, which is simpler and easier to manufacture compared to existing clamping structures.

[0010] In some embodiments, the bendable portion has at least two connecting units arranged along the length direction of the movable arm, adjacent connecting units are connected by a connecting portion, and at least one side of the connecting portion is provided with a first gap, the first gap extending from the connecting portion along the circumference of the movable arm to the side of the movable arm, so that adjacent connecting units can be bent and deformed under the action of external force.

[0011] In some embodiments, each of the connecting units has a second gap that extends through the outer and inner walls of the movable arm, so that each of the connecting units itself can bend and deform under external force.

[0012] In some embodiments, the cylindrical structure further includes a cylindrical connecting base located at the rear end of the fixed arm and the movable arm, wherein the fixed arm is fixed to the connecting base and the movable arm is movable relative to the fixed arm and the connecting base.

[0013] In some embodiments, the connecting base is provided with a locking portion for forming a forward locking structure with the motion conversion component and / or a window for connecting with a release spring of the control component.

[0014] In some embodiments, the clamping assembly is cut using a laser cutting process.

[0015] In some embodiments, the fixed arm has a first arm body, and the first clamping head bends from the front end of the first arm body toward the movable arm side; the movable arm has a second arm body, and the second clamping head bends from the second arm body toward the fixed arm side; the clamping assembly has a pre-closed state, a clamped state, and an open state; when the clamping assembly is in the pre-closed state, the movable arm and the fixed arm have different lengths, and the first clamping head and the second clamping head extend relative to each other, forming an overlapping pre-clamping structure; when the clamping assembly is in the clamped state, the first clamping head and the second clamping head can pull and close the tissues on both sides of the wound; when the clamping assembly is in the open state, the movable arm is open relative to the fixed arm.

[0016] In some embodiments, wherein,

[0017] The bending angle α of the first clamping head has a range of 45°≤a≤160°;

[0018] And / or, the bending angle b of the second clamping head is in the range of 45°≤b≤160°.

[0019] In some embodiments, the bending angle α of the first clamping head is in the range of 55°≤a≤140°;

[0020] And / or, the bending angle b of the second clamping head is in the range of 55°≤b≤140°.

[0021] In some embodiments, the ends of the first clamping head and / or the second clamping head have pointed structures that facilitate piercing the target tissue.

[0022] In some embodiments, the sidewall of the cylindrical structure is provided with a clearance groove arranged in the front-to-back direction. The clearance groove is used to avoid the motion conversion component in the path of the motion conversion component rotating in the front-to-back direction.

[0023] In some embodiments, the clearance groove is provided on the fixed arm. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the clamping component in one embodiment of the present application, where the clamping component is in a pre-clamping state.

[0025] Figure 2 This is a schematic diagram of the clamping component in an open state in one embodiment of this application;

[0026] Figure 3 This is a schematic diagram showing the second hook located in front of the first hook in one embodiment of this application;

[0027] Figure 4-7 This is a schematic diagram of the clamping component performing a closing operation on a large wound in one embodiment of this application;

[0028] Figure 8 This is a schematic diagram showing the first hook located in front of the second hook in one embodiment of this application;

[0029] Figure 9 This is a schematic diagram showing several different bending angles of the first hook and the second hook in one embodiment of this application;

[0030] Figure 10-12This is a schematic diagram of the pointed protrusion structure on the first hook and the second hook in several different embodiments of this application. In order to better show the shape of the pointed protrusion structure, the fixed arm and the movable arm are opened circumferentially, and the first hook and the second hook have not been bent.

[0031] Figure 13 This is an exploded view of a single-arm pull-type clamp in one embodiment of this application;

[0032] Figure 14 This is a schematic diagram of the internal structure of the clamping component in an open state according to one embodiment of this application;

[0033] Figure 15 This is a schematic diagram of the connection structure of the motion conversion component and the control component inside the traction single-arm clamp in one embodiment of this application;

[0034] Figure 16 This is a schematic diagram of the clearance groove on the clamping component in one embodiment of this application;

[0035] Figure 17 This is a schematic diagram of the motion conversion component after the retention part and the detachment part are separated in one embodiment of this application. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0037] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0038] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0039] To provide a clamping assembly with a simpler structure and easier manufacturing for pull-type single-arm clamps, please refer to [reference needed]. Figure 1 and 2 In one embodiment, the traction-type single-arm clamp includes a clamping component 100, which is used to clamp the tissues on both sides of the wound under the operation of the operator, so as to keep the wound closed for suturing or other operations and promote wound healing.

[0040] Please continue to refer to this. Figure 1 and 2 Unlike other clamping devices (such as double-arm or triple-arm clamps), this clamping assembly 100 includes a fixed arm 110 and a movable arm 120 that can move relative to the fixed arm 110. The fixed arm 110 opens and closes actively without operator control; for example, it may be made of a rigid material such as metal or hard plastic, or structurally it may not have a bendable structure. The operator primarily opens and closes the entire clamping assembly 100 by moving the movable arm 120. The fixed arm 110 has a first clamping head 111, and the movable arm 120 has a second clamping head 121 and a bendable portion 123. The bendable portion 123 can be bent under external force, allowing the second clamping head 120 to open and close relative to the first clamping head 110. The clamping assembly 100 has a pre-clamped state, a clamped state, and an open state. Figure 1 This can be seen as a schematic of a pre-clamped state. Figure 2 This can be considered an illustration of the open state. Please refer to [reference needed] when the clamping assembly 100 is in the open state. Figure 2 The movable arm 120 is open relative to the fixed arm 110, while the clamped state is the state in which the clamping device pulls and clamps the tissues on both sides of the wound together. For example, refer to... Figure 7 .

[0041] Please refer to Figure 1The entire clamping assembly 100 is a one-piece cylindrical structure. This one-piece molding means that the relevant structure is formed from a single part, for example, by directly cutting a cylindrical substrate (such as a powder metallurgy sintered sleeve or other sleeve substrate) using laser cutting or other cutting processes. Of course, when the clamping assembly 100 is laser-cut, extremely small gaps can be achieved, which is beneficial for miniaturization and improved structural compactness. The cylindrical structure has an assembly cavity 101 for accommodating a motion conversion component (described in more detail later). This motion conversion component is used to transmit the force driving the clamping assembly 100 to open and close.

[0042] In the above embodiments, the clamping assembly adopts a one-piece molded cylindrical structure, which is divided into at least a fixed arm and a movable arm arranged opposite each other. The movable arm has an one-piece molded flexible portion, which allows the movable arm to open and close relative to the fixed arm, achieving a clamping effect on the tissues on both sides of the wound, thus aiding in wound suturing and healing. The entire clamping assembly is a single part, which is simpler in structure and easier to manufacture compared to existing clamping structures.

[0043] Please continue to refer to this. Figure 1 and 2 The flexible portion 123 can be implemented using a structure that is more easily bent and deformed than other parts, and this structure can be integrally formed with other structures of the clamping assembly. The second clamping head 121 has a higher resistance to bending deformation than the flexible portion 123, ensuring that the second clamping head 121 provides a better gripping effect on the target object. This bending deformation of the flexible portion 123 is reversible; that is, the flexible portion 123 is elastic and can spring back to its original position when the external force is removed, thus this bending deformation can be repeated.

[0044] Please combine Figure 1 and 2 In some embodiments, the flexible portion 123 has at least two connecting units 1231 arranged along the length of the movable arm 120. Adjacent connecting units 1231 are connected by a connecting portion 1232, at least one side of which has a first gap 1233 extending circumferentially from the connecting portion 1232 to the side of the movable arm 120, so that adjacent connecting units 1231 can be bent and deformed under external force, such as... Figure 1 and 13 As shown. The connecting part 1232 can be located in the middle of the adjacent connecting unit 1231, and the connecting units 1231 form a chain connection, thereby having better bending deformation capability.

[0045] To further improve the bending deformation capacity and recovery capacity of the bendable part 123, please refer to [further details needed]. Figure 1 and2 In some embodiments, each connecting unit 1231 may further have a second gap 1234, which penetrates the outer wall and inner wall of the movable arm 120, so that each connecting unit 1231 itself can be bent and deformed under the action of external force. Thus, under the dual action of the bending and deformation capability of the connecting unit 1231 itself and the bending and deformable structure formed between adjacent connecting units 1231, the entire bendable part 123 has better bending and deformation capability and reset capability.

[0046] The flexible portion 123 shown in the above embodiments can be directly processed on the movable arm 120 by laser cutting or other cutting processes. Of course, the above embodiments are only one example of the flexible portion 123, and the flexible portion 123 shown in this application can also adopt various existing forms of flexible deformable structures.

[0047] On the other hand, the first clamping head 111 and the second clamping head 121 can clamp the tissue by interlocking with each other. This method is effective for small wounds (i.e., the wound size is less than or approximately equal to the opening distance of a single-arm clamp). However, when the wound size is much larger than the corresponding clamping device (this application refers to such a wound as a large wound), since both the fixed arm and the movable arm apply force on one side when hooking the tissue, it is difficult for a single clamping arm to fix the corresponding tissue before the clamping assembly is fully closed.

[0048] Based on the above problems, some embodiments of this application further improve the first clamping head 111 and the second clamping head 121, providing a new traction-type single-arm clamp for closing large wounds in the patient's body, thereby achieving hemostasis and wound healing. This traction-type refers to the requirement that when the single-arm clamp closes the tissues on both sides of a large wound, it needs to pull the tissues a considerable distance to the closing point to achieve a closure effect. Although existing clamping devices also have a certain traction effect on the tissues on both sides of a small wound when closing it, the traction distance is short and the traction effect is not significant due to the small size of the wound. Therefore, this application refers to the closure device capable of pulling the tissues on both sides of a large wound to the closing point as a traction-type single-arm clamp.

[0049] Please refer to Figure 3 The first clamping head 111 is formed by bending from the front end of the fixed arm 110 toward the side where the movable arm 120 is located, and the second clamping head 121 is formed by bending from the front end of the movable arm 120 toward the side where the fixed arm 110 is located. Figure 1 and 3 As shown, for ease of description, this application defines the end of the entire clamping device closest to the operator as rear (B) and the other end as front (F).

[0050] Please continue to refer to this. Figure 3When the clamping assembly 100 is in the pre-clamping state, the first clamping head 111 and the second clamping head 121 extend relative to each other, and the lengths (i.e., the front-to-back dimensions) of the fixed arm 110 and the movable arm 120 are different. Therefore, the second clamping head 121 is located in front of the first clamping head 111 to form an overlapping pre-clamping structure. This overlapping pre-clamping structure enables the fixed arm 110 to firmly engage with the tissue on one side of the large wound, so that when the movable arm 120 hooks the tissue on the other side, the fixed arm 110 can pull the tissue on one side and move it towards the movable arm 120, thereby achieving closure of the entire large wound. Although existing single-arm clamps and three-arm clamps also have a basically unchanged fixed arm, during the clamping process, when the movable arm tries to hook the tissue on one side of the large wound, the fixed arm is prone to failure to hook with the tissue on the other side. Even though some clamping devices have pointed structures at the ends of the fixed arms, these arms apply force only on one side when pulling tissue. Therefore, it is difficult for a single fixed arm to fix the corresponding tissue before the fixed arm and movable arm are completely closed. Of course, in addition to closing large wounds, this traction-type single-arm clamp can also be used for closing small wounds.

[0051] The following diagram provides a more detailed explanation of the closing effect.

[0052] Please refer to Figure 4 The operator can use the endoscope to initially locate the target large wound A, and open the movable arm 120 for the first time to prepare to control the clamping component 100 to fix the tissue on one side of the large wound A.

[0053] Please refer to Figure 5 After selecting the suture initiation point, a pre-clamping operation is performed, causing the movable arm 120 to move relative to the fixed arm 110 to form a pre-clamping state. The purpose is to maintain the clamping component in a non-released state and use the differentially designed clamping component 100 to pre-clamp the tissue on one side of the large wound A (clamping the tissue but not releasing the clamp). In this step, due to the difference in length between the two clamping arms of the clamping component 100, the fixed arm 110 can be used as an anchor point during pre-clamping. Using the compressive force of the movable arm 120 pulling the tissue, the tip of the fixed arm 110 can penetrate into the tissue at the moment of pre-clamping to form an initial anchor point.

[0054] More specifically, such as Figure 5 As shown by the middle arrow, the fixed arm 110 and the movable arm 120 can clamp the tissue in a relative manner, thereby forming two clamping forces in opposite directions. The restriction of the internal space at the intersection of the fixed arm 110 and the movable arm 120 leads to an increase in the surface tension of the tissue. Under the action of tension, the tissue is more easily punctured and fixed by the bent part between the teeth of the fixed arm 110, thereby forming an effective hooking effect.

[0055] Please refer to Figure 6 After pre-clamping is completed, a second opening operation can be performed. The operator can control the movable arm 120 to open again via a control handle (refer to the control handle of existing clamping devices). Since the movable arm 120 can be directly controlled by the operator to open, it is easier for it to detach from the tissue. After the movable arm 120 is opened, the spatial orientation of the clamping component 100 is adjusted using the matching endoscopic positioning function, so that the end of the movable arm 120 is precisely hooked onto the tissue on the opposite edge of the large wound A.

[0056] Then, please refer to Figure 7 Once the movable arm 120 hooks onto the tissue on the opposite side of the large wound A, the clamping assembly can be closed via the control handle. During this process, the fixed arm 110 continuously maintains the tissue anchorage, preventing the tissue from easily dislodging. This pulls the tissue on one side of the large wound A, which is fixed by the fixed arm 110, towards the other side, so that the fixed arm 110 and the movable arm 120 work together to clamp the tissue on both sides of the large wound A for effective suturing.

[0057] Furthermore, in the above Figure 1-7 The illustrated embodiment shows an example where, in the closed state, the movable arm 120 is longer than the fixed arm 110, thus the second gripping head 121 is located in front of the first gripping head 111. However, in other embodiments, please refer to... Figure 8 In the closed state, the fixed arm 110 can also be longer than the movable arm 120. Therefore, the first clamping head 111 is located in front of the second clamping head 121, thus forming an overlapping pre-clamping structure. This clamping structure can also be pre-clamped so that the fixed arm 110 first fixes one side of the tissue, and then the other side of the tissue is hooked by controlling the opening of the movable arm 120. Finally, the closure of the clamping assembly 100 causes the two sides of the tissue to approach and close each other.

[0058] Furthermore, in order to form the first clamping head 111 and the second clamping head 121, please refer to... Figure 9 In some embodiments, the fixed arm 110 has a first arm body 112, and a first gripping head 111 bends from the front end of the first arm body 112 toward the movable arm 120. The movable arm 120 has a second arm body 122, and a second gripping head 121 bends from the second arm body 122 toward the fixed arm 110.

[0059] In some embodiments, the bending angle α of the first clamping head 111 is in the range of 45°≤a≤160°; and / or, the bending angle b of the second clamping head 121 is in the range of 45°≤b≤160°.

[0060] In other embodiments, the bending angle 'a' of the first gripping head 111 ranges from 55° ≤ a ≤ 140°; and / or, the bending angle 'b' of the second gripping head 121 ranges from 55° ≤ b ≤ 140°. This limitation of bending angles allows the fixed arm 110 and / or the movable arm 120 to prevent slippage through a locking effect after insertion into the tissue, thereby providing more stable mechanical support when pulling the tissue and ensuring the reliability of the gripping. For example... Figure 9 The image shows that the fixed arm 110 has bending angles of 70°, 90° and 110° respectively, and the movable arm 120 can also have bending angles of 70°, 90° and 110°.

[0061] Furthermore, in some embodiments, to facilitate the insertion of the fixed arm 110 and the movable arm 120 into the tissue, the ends of the first clamping head 111 and / or the second clamping head 121 have pointed structures that facilitate piercing the target tissue. These pointed structures increase the sharpness of the ends of the fixed arm 110 and the movable arm 120, increasing the single-point pressure when the fixed arm 110 and the movable arm 120 penetrate the tissue, reducing the resistance to piercing the tissue mucosa, and thus making it easier to penetrate the tissue. The pointed structure may include, but is not limited to, the following shapes: such as... Figure 10 The wavy pattern shown (the differences between the examples lie in the distance between the crests and troughs of the wave) Figure 11 The arrow shape shown and Figure 12 The double-pointed spikes shown (the differences between the examples are in the height of the spikes), etc.

[0062] Furthermore, regarding the opening and closing control of the clamping assembly 100, in some embodiments, the traction-type single-arm clamp also includes a motion conversion assembly and a control assembly. The motion conversion assembly and the clamping assembly form a clamping structure that can clamp and release tissue under the drive of the control assembly. This application... Figure 13-15 An example of a motion conversion component 200 and a control component 300 is shown in the illustration, but the motion conversion component 200 and the control component 300 shown in this application are not limited to the illustrated structure. Of course, in other embodiments, the pull-type single-arm clamp may also have other related components according to functional requirements, and this part can be referred to in the prior art.

[0063] The control component 300 receives instructions from the operator to generate a force that controls the clamping component 100. The operator's instructions to the control component 300 can be direct input of force and motion, such as manually applying force, or electronically controlled, such as using a motor or other driving component to input the relevant force. The motion conversion component 200 converts the force input from the control component 300 into the motion of the movable arm 120.

[0064] In some embodiments, the motion conversion component 200 has a disengagement portion (such as, but not limited to, a disengagement portion). Figure 13 The disengagement portion 210 shown and the retention portion (which may be, but is not limited to, the retention portion for retention in the patient's body together with the clamping assembly 100) are shown. Figure 13 (The retention portion 220 is shown). The detachment portion and the retention portion may each consist of one or more parts. This division is based on the function of detachable connection and does not mean that the retention portion and the detachment portion must be two separate parts. The retention portion is connected to the movable arm 120 to transmit a force to the movable arm 120 that drives the clamping assembly 100 to switch between a pre-clamped state and an open state, for example, to drive the movable arm 120 to open and close. The detachment portion is connected to the retention portion in a manner that allows it to disengage from the retention portion during its rearward movement, so that the detachment portion and the retention portion can move as a whole under the drive of the control assembly 300, and when the detachment portion moves rearward to a set position, the detachment portion and the retention portion can disengage, thereby retaining the retention portion together with the clamping assembly in the body of the patient, keeping the wound surface closed.

[0065] The control component is connected to the clamping component 100 in a manner that allows it to disengage from the clamping component 100 during its rearward movement (e.g., but not limited to) Figure 13 The connection structure between the control component 300 and the clamping component 100 is shown so that, under the operator's control, the control component can drive the entire clamping component to move, and when the control component moves backward to a set position, the clamping component can disengage from the control component to retain the clamping component within the patient's body. The control component is also connected to the disengaged portion (such as, but not limited to, the disengaged portion). Figure 13 The control component 300 shown is connected to the detachment part to drive the retention part and the detachment part to move in the front-back direction, and during the backward movement, the detachment part is driven to detach from the retention part.

[0066] Of course, the connection structure between the retention part and the movable arm 120, the connection structure between the retention part and the disengagement part, the connection structure between the control component and the clamping component 100, and the connection structure between the control component and the disengagement part are all relatively mature in clamping devices. In addition to the example shown in this application, the structure of existing clamping devices can also be referred to to achieve the same result.

[0067] The following are some specific structural embodiments, but this application is not limited to these embodiments.

[0068] In some embodiments, in order to enable the movable arm 120 having the bendable portion 123 to bend, please refer to... Figure 13-15The retaining portion 210 includes a sliding block 211 and a rocker arm 212. The sliding block 211 is connected to the disengaging portion 220 in such a way that it can disengage from the disengaging portion 220 during the rearward movement of the disengaging portion. One end of the rocker arm 212 is rotatably connected to the sliding block 211, and the other end is connected to the movable arm 120, so as to drive the bendable portion 123 to bend and reset when the sliding block 211 moves in the front-back direction.

[0069] Please refer to Figure 13 and 14 In some embodiments, the sliding block 211 may have a mounting shaft 2113, and the rear end of the rocker arm 212 is fitted to the mounting shaft 2113 through an elliptical hole, enabling it to swing circumferentially. The front end of the rocker arm 212 may be connected to the movable arm 120; this connection may be a fixed connection or a movable connection. The clamping assembly 100 may form a cylindrical structure, and the sliding block 211 is disposed within the assembly cavity 101 of the cylindrical structure. When the sliding block 211 moves in the front-back direction within the clamping assembly 100, it can drive the rocker arm 212 to swing around the mounting shaft 2113, thereby controlling the bending and resetting of the movable arm 120. For example, as... Figure 14 As shown, when the sliding block 211 moves forward, the rocker arm 212 can drive the movable arm 120 to open. Conversely, when the sliding block 211 moves backward, it can drive the movable arm 120 to close with the fixed arm 110.

[0070] Please refer to Figure 13 In some embodiments, the sliding block 211 can be divided into a first block 2111 and a second block 2112, which are interlocked and fixed together. This reduces manufacturing difficulty and facilitates the mounting of the rocker arm 212 onto the sliding block 211. The mounting shaft 2113 can be located on either the first block 2111 or the second block 2112 and blocked by the other, thus preventing the rocker arm 212 mounted on the mounting shaft 2113 from falling off.

[0071] Of course, the above is only one driving method of the motion conversion component 200 to the movable arm 120. In other embodiments, other methods can be used instead.

[0072] exist Figure 13 and 14In the illustrated embodiment, the clamping assembly 100 forms a cylindrical structure, and the conversion element (e.g., rocker arm 212) of the motion conversion assembly 200 employs a swinging or rotating mechanism. These conversion elements have a motion trajectory toward the cavity wall of the assembly cavity 101 during the movement of the movable arm 120. When the clamping assembly 100 is a cylindrical structure, the conversion element swings or rotates left and right within the cylindrical structure. This requires the inner diameter of the cylindrical structure (i.e., the radial dimension of the assembly cavity 101) to accommodate the swinging space of the conversion element. This results in a larger radial dimension of the cylindrical structure, which increases the discomfort of the patient when the entire clamping assembly 100 is inserted into the patient's body. Therefore, please refer to... Figure 14 , 16 In some embodiments, the cavity wall of the assembly cavity 101 has a clearance groove 103, which is located on the movement trajectory of the conversion member (e.g., rocker arm 212 or sliding block 214), especially on the swing trajectory of the conversion member, so that a part of the conversion member can extend into the clearance groove 103. Therefore, the swing or rotation requirements of the conversion member are met without increasing the radial dimension of the assembly cavity 101.

[0073] Please refer to Figure 14 and 16 The clearance groove 103 can be provided on the side wall of the cylindrical structure, and the clearance groove 103 can be arranged in the front-back direction. Specifically, in different embodiments, Figure 14 In the illustrated embodiment, the clearance groove 103 may be formed on the fixed arm 110. Alternatively, the clearance groove 103 may also be provided at other locations on the clamping assembly 100.

[0074] The foregoing embodiments mainly illustrate the driving method of the motion conversion component 200 on the movable arm 120. However, in this application, the driving method of the motion conversion component 200 on the movable arm 120 is not limited to the above embodiments, and the structure shown in the prior art can also be adopted.

[0075] Furthermore, in order to limit the motion conversion component 200 to its extreme forward position, in some embodiments, the clamping component 100 is a cylindrical structure, with the motion conversion component 200 at least partially located within the cylindrical structure, which has a forward limiting portion. This forward limiting portion is located on the forward path of the motion conversion component 200 to limit its extreme forward position.

[0076] Please refer to Figure 13 and 14In some embodiments, the forward limiting portion is a limiting shaft 104, which is fixedly mounted on the clamping assembly 100, for example, in the assembly cavity 101 of the clamping assembly 100, or in the support arm 140 of the clamping assembly 100, which may be located between the fixed arm 110 and the movable arm 120. The support arm 140 may be integrally formed with the fixed arm 110 and the movable arm 120. The front end of the sliding block 211 of the motion conversion assembly 200 may have a limiting groove 2114 that cooperates with the limiting shaft 104. When the sliding block 211 moves forward until the limiting groove 2114 contacts the limiting shaft 104 (e.g. Figure 14 As shown), the slider 211 stops moving forward. Of course, these are just some examples of limiting the forward position of the motion conversion component 200; in other embodiments, other existing forward limiting structures may also be used.

[0077] Furthermore, this application also provides some examples regarding the detachable connection between the retaining portion 210 and the detaching portion 220. Please refer to... Figure 15 and 17 In some embodiments, the release portion 220 (specifically, the release rod) has a main body 221, a head 222, and a neck 223 connecting the head 222 and the main body 221. The retention portion 210 (specifically, the retaining head 213 of the retention portion 210) has deformable legs 2131. The legs 2131 form a retaining cavity 2132 with an opening, the head 222 is accommodated in the retaining cavity 2132, and the neck 223 passes through the opening. During the rearward movement of the disengaging portion 220, especially when the disengaging portion 220 moves to a position where the retaining portion 210 can no longer move rearward (as the motion conversion component 200 moves rearward, the clamping component 100 clamps the tissue tighter and tighter; when the clamped tissue affects the clamping component 100, it can no longer close, and the retaining portion 210 also cannot continue to move rearward), the disengaging portion 220 continues to move rearward under the operator's control. Its head 222 can push the support leg 2131 to deform outward, causing the disengaging portion 220 to separate from the retaining portion 210. In this embodiment, the clamping head 213 and the disengaging lever ( Figure 15 As shown in Figure 220, it can be a single-piece molded part. A small amount of material can be left between the support leg 2131 and the main body 221, and / or between the cavity wall of the locking cavity 2132 and the head 222, to form a narrow connecting rib 2134. This connecting rib 2134 not only ensures the connection between the locking head 213 and the release rod, but can also be gradually stretched under certain conditions. When the yield limit is reached, the connecting rib 2134 will break, thereby realizing the separation of the locking head 213 and the release rod. Of course, the detachable connection between the detachable part 220 and the retaining part 210 can also adopt other structures in the prior art, and is not limited to the one shown in this embodiment.

[0078] After the retained portion 210 and the disengaged portion 220 disengage, in order to keep the clamping assembly 100 in the clamped state, it is undesirable for the retained portion 210 to move forward under the reaction force of the tissue and open the clamping assembly 100. Therefore, in some embodiments, the clamping assembly 100 has a locking portion, and the outer side of the support leg 2131 has a locking engagement portion. When the head 222 pushes the support leg 2131 to deform outward, the locking engagement portion and the locking portion form a lock to keep the clamping assembly 100 in the closed state. This locking effect can be achieved before, during, or after the disengaged portion 220 separates from the retained portion 210. More specifically, in Figure 16 In the illustrated embodiment, the locking engagement part is a locking plate 2133, and the locking part is a locking window 105. Of course, in other embodiments, the locking engagement part and the locking part may also adopt other implementation methods in the prior art, and are not limited to the structure described in this embodiment.

[0079] In order to keep the clamping assembly 100 within the patient's body, some embodiments also require external detachment, i.e., the detachment of the control assembly 300 and the clamping assembly 100. Please refer to... Figure 15 In some embodiments, the control assembly 300 has a release spring 310 and a traction line 320 (such as a steel wire, steel rope, or other existing line used for traction) for connection to a control handle. The traction line 320 is connected to the motion conversion assembly 200, for example, to the release lever of the release portion 220, to drive the entire motion conversion assembly 200 back and forth. The release spring 310 is connected to the traction line 320. The clamping assembly 100 has a window 106 to which the release spring 310 is hooked to connect the clamping assembly 100 to the control assembly 300. This connection ensures that the control assembly 300 can control the back and forth movement of the clamping assembly 100 before release, and also allows the release spring 310 to separate from the window 106 during the rearward movement of the traction line 320, thus separating the clamping assembly 100 from the control assembly 300. Specifically, once the clamping component 100 clamps the tissue, it cannot move backward with the control component 300, thus causing the release spring 310 to disengage from the window 106 of the clamping component 100. Of course, this is only an example of a detachable connection between the clamping component 100 and the control component 300; this detachable connection can also be implemented in other ways in the prior art and is not limited to the structure described in this embodiment.

[0080] Furthermore, only the relevant structural components of the control assembly 300, clamping assembly 100, and motion conversion assembly 200 are described here. For other embodiments, please refer to [the relevant documentation]. Figure 15The control assembly 300 may also include a rotating sleeve 330 and an outer tube 340. The traction cable 320 is inserted inside the outer tube 340. The rotating sleeve 330, the release spring 310, the clamping assembly 100, and the motion conversion assembly 200 are connected as a whole structure. Under the control of the traction cable 320, the whole structure can rotate relative to the outer tube 340 to adjust the clamping direction. The outer tube 340 protects the traction cable 320 and other components inside. After disengagement, the outer tube 340, the rotating sleeve 330, the traction cable 320, and the disengagement portion 220 are removed together and exited from the body of the patient.

[0081] Furthermore, in some embodiments, the control component 300 may also include a control handle located at the rear end of the entire device, which is used by an operator to control the clamping component 100 at the front end.

[0082] Back to Figure 1 and 2 In the illustrated embodiment, the clamping assembly 100 further includes a cylindrical connecting sleeve 130. Figure 1 (As shown in the boxed portion), the connecting sleeve 130 is located at the rear end of the fixed arm 110 and the movable arm 120, and is integrally formed with the fixed arm 110 and the movable arm 120. The connecting sleeve 130 is provided with a locking part for forming a forward locking structure with the retention part 210 and / or a window 106 for connecting with the release spring 310 of the control assembly 300.

[0083] Please refer to Figure 1 and 2 In some embodiments, a support arm 140 is provided between the fixed arm 110 and the movable arm 120. The support arm 140 may also be integrally formed with the fixed arm 110 and the movable arm 120. The support arm 140 may also be provided with functional structures, such as guide portions for guiding the movement of moving parts (e.g., sliding block 211, connecting rod 215, etc.) in the front-back direction. Figure 2 The guide groove 108 shown may also be a guide rail or other form of guide part. The conversion part has a corresponding mating part (such as...). Figure 2 The sliding block 211 shown is provided with a protrusion 2115 that cooperates with the guide portion to limit the movement of the moving part in a manner guided by the guide portion.

[0084] In some embodiments, please refer to Figure 1 and 2 The clamping component 100 is a one-piece molded structure made by laser cutting.

[0085] In addition, please refer to Figure 1 and 2In some embodiments, an observation window 107 is provided on the connecting sleeve 130 at a position opposite to the release spring 310, so as to observe the disengagement of the release spring 310 and other internal conditions.

[0086] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A pull-type single-arm clamp, characterized in that, include: A clamping assembly, wherein the clamping assembly is an integrally formed cylindrical structure that forms an assembly cavity, the cylindrical structure having a fixed arm and a movable arm disposed opposite to each other, the fixed arm having a first clamping head, the movable arm having a bendable portion and a second clamping head, the bendable portion being able to bend under external force so that the second clamping head can open and close relative to the first clamping head; A motion conversion assembly, at least partially located within the assembly cavity, having a disengagement portion and a retention portion for retention within the patient along with the clamping assembly, the disengagement portion being connected to the retention portion in a manner that allows it to disengage from the retention portion during its rearward movement, the retention portion being connected to the movable arm to transmit a force to the movable arm that drives the movable arm to move relative to the fixed arm; The control component is connected to the clamping component in such a way that it can disengage from the clamping component during its rearward movement; the control component is also connected to the disengaging portion to drive the retaining portion and the disengaging portion to move in the front-back direction.

2. The pull-type single-arm clamp as described in claim 1, characterized in that, The bendable portion has at least two connecting units arranged along the length direction of the movable arm. Adjacent connecting units are connected by a connecting portion. At least one side of the connecting portion is provided with a first gap. The first gap extends from the connecting portion along the circumference of the movable arm to the side of the movable arm, so that adjacent connecting units can be bent and deformed under the action of external force.

3. The pull-type single-arm clamp as described in claim 2, characterized in that, Each of the connecting units has a second gap that penetrates the outer and inner walls of the movable arm, so that each of the connecting units itself can bend and deform under the action of external force.

4. The pull-type single-arm clamp as described in claim 1, characterized in that, The cylindrical structure further includes a cylindrical connecting base located at the rear end of the fixed arm and the movable arm. The fixed arm is fixed to the connecting base, and the movable arm is movable relative to the fixed arm and the connecting base.

5. The pull-type single-arm clamp as described in claim 4, characterized in that, The connecting base is provided with a locking part for forming a forward locking structure with the motion conversion component and / or a window for connecting with the control component.

6. The pull-type single-arm clamp as described in claim 1, characterized in that, The clamping assembly is cut using a laser cutting process.

7. The pull-type single-arm clamp as described in claim 1, characterized in that, The fixed arm has a first arm body, and the first clamping head bends from the front end of the first arm body toward the movable arm side. The movable arm has a second arm body, and the second clamping head bends from the second arm body toward the fixed arm side. The clamping assembly has a pre-closed state, a clamped state, and an open state. When the clamping assembly is in the pre-closed state, the movable arm and the fixed arm have different lengths, and the first clamping head and the second clamping head extend relative to each other and form an overlapping pre-clamping structure. When the clamping assembly is in the clamped state, the first clamping head and the second clamping head can pull and close the tissues on both sides of the wound. When the clamping assembly is in the open state, the movable arm is open relative to the fixed arm.

8. The pull-type single-arm clamp as described in claim 7, characterized in that, in, The bending angle α of the first clamping head has a range of 45°≤a≤160°; And / or, the bending angle b of the second clamping head is in the range of 45°≤b≤160°.

9. The pull-type single-arm clamp as described in claim 7, characterized in that, The bending angle α of the first clamping head has a range of 55°≤a≤140°; And / or, the bending angle b of the second clamping head is in the range of 55°≤b≤140°.

10. The pull-type single-arm clamp as described in claim 1, characterized in that, The ends of the first clamping head and / or the second clamping head have pointed structures that facilitate piercing the target tissue.

11. The pull-type single-arm clamp as described in any one of claims 1-10, characterized in that, The sidewall of the cylindrical structure is provided with a clearance groove arranged in the front-to-back direction. The clearance groove is used to avoid the motion conversion component in the path of the motion conversion component rotating in the front-to-back direction.

12. The pull-type single-arm clamp as described in claim 11, characterized in that, The clearance groove is provided on the fixed arm.

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