A hemostatic clamping device

Abstract

The present invention discloses a hemostatic clamping device, comprising: a detachably connected clamping portion and a conveying portion, and a soft fastening sleeve for accommodating a clamping arm of the clamping portion, wherein the two ends of the soft fastening sleeve are respectively provided at the proximal end of the clamping portion and the distal end of the conveying portion in an interference fit; under the action of the conveying portion, the clamping portion can be opened, clamped, or moved relative to the soft fastening sleeve, and when an external force is greater than a certain value, the conveying portion is separated from the clamping portion. The hemostatic clamping device provided by the present invention uses a soft fastening sleeve to replace the complex connection structure in the prior art, thereby simplifying the structure of the hemostatic clamping device, and because the soft fastening sleeve has a certain deformation amount, the processing accuracy requirements are lower during the processing, which can reduce the processing cost; when the clamping portion is separated from the conveying portion, the clamping portion has a portion that overlaps with the soft fastening sleeve in the axial direction, which can reduce the length of the structure retained in the human body.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more particularly to a hemostatic clamping device. Background Art

[0002] Pathological bleeding in the gastrointestinal system, digestive system, biliary system, vascular system, other cavities and hollow cannulae is a common emergency in internal medicine. Simple drug treatment has a long course of treatment and severe side effects. If necessary, endoscopic surgery is required to achieve the purpose of hemostasis.

[0003] However, during use, the clamping device in the prior art remains in the human body for a long time after clamping, and the connection part between the clamping arm and the push-pull end has a complex structure, a large number of parts, a cumbersome assembly process, and a high production cost.

[0004] In summary, how to simplify the structure of the hemostatic clamping device while maintaining its normal function is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a hemostatic clamping device, which simplifies the structure of the hemostatic clamping device by replacing the complex connection structure in the prior art with a soft fastening sleeve. Moreover, since the soft fastening sleeve has a certain deformation amount, the processing accuracy requirements are lower during the processing, which can reduce the processing cost.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A hemostatic clamping device comprises a detachably connected clamping portion and a delivery portion, and further comprises a flexible fastening sleeve for accommodating a clamping arm of the clamping portion, wherein two ends of the flexible fastening sleeve are respectively sleeved on a proximal end of the clamping portion and a distal end of the delivery portion in an interference fit; when the clamping arm is clamped, the outer dimension of the distal end of the clamping portion is greater than or equal to the outer dimension of the proximal end thereof;

[0008] In the initial state, the clamping portion is fixed axially relative to the flexible fastening sleeve, and the conveying portion can drive the clamping portion to open or clamp;

[0009] When the external force exerted by the conveying portion on the clamping portion increases, the clamping portion moves relative to the flexible fastening sleeve in the axial direction;

[0010] When the clamping portion continues to move toward the proximal end of the soft fastening sleeve to a set position, the clamping arm in the clamped state is at least partially received in the soft fastening sleeve, the clamping portion expands the internal size of the soft fastening sleeve, and the conveying portion increases the pulling force acting on the clamping portion to separate the conveying portion from the clamping portion.

[0011] Preferably, the outer dimension of the distal end of the clamping portion is equal to the outer dimension of its proximal end, and the inner diameter of the proximal end of the clamping portion is larger than the outer dimension of the distal end of the conveying portion, so that when the proximal end of the clamping portion moves to the proximal end of the soft fastening sleeve, the inner dimension of the proximal end of the soft fastening sleeve is expanded.

[0012] Preferably, the clamping portion is provided with a support frame, the proximal end of the support frame is interference fit with the soft fastening sleeve, and the clamping arm is openably and clampably connected to the distal end of the support frame.

[0013] Preferably, the outer dimensions of the distal end of the clamping arm in the clamped state are larger than the outer dimensions of the support frame.

[0014] Preferably, the outer dimension of the distal end of the support frame is larger than the outer dimension of the proximal end thereof, and when the distal end of the support frame moves into the soft fastening sleeve, the inner dimension of the soft fastening sleeve is expanded.

[0015] Preferably, the outer surface between the distal end and the proximal end of the support frame is provided with a transition surface with a changing external dimension.

[0016] Preferably, the clamping arm is arranged on the support frame using a four-bar structure, and one hinged end of the four-bar structure is connected to the conveying part.

[0017] Preferably, the four-bar linkage structure is composed of a pair of clamping arms and a movable joint, and the movable joint is hingedly connected to the push-pull end of the clamping arm to form the four-bar linkage structure;

[0018] The support frame is connected to the hinge of the clamping arm.

[0019] Preferably, a U-shaped structure with an opening toward the clamping arm is provided at the distal end of the support frame, the four-bar linkage structure and the U-shaped structure at least partially overlap in the axial direction, and in the clamped state, the surface size of the movable joint exposed to the outside of the U-shaped structure gradually expands from its proximal end to the distal end.

[0020] Preferably, in the clamped state, the outer dimensions of the clamping arm are equal to the outer dimensions of the distal end of the support frame.

[0021] Preferably, the conveying portion is provided with a connecting ring for connecting with the soft fastening sleeve and a driving shaft passing through the middle of the connecting ring and connected to the clamping portion, and the connecting ring is rotatably provided at the distal end of the conveying portion.

[0022] Preferably, the connecting ring includes a fixing portion arranged at its proximal end and a guiding portion arranged at its distal end, and the soft fastening sleeve is arranged outside the fixing portion and the guiding portion; the outer surface of the fixing portion is a cylindrical surface, which is interference fit with the soft fastening sleeve; the outer surface of the guiding portion is a conical surface whose size gradually increases from the distal end to the proximal end.

[0023] Preferably, the proximal end of the support frame is a hollow cylindrical structure, and the inner diameter of the hollow cylindrical structure is greater than or equal to the outer diameter of the guide portion.

[0024] Preferably, an annular groove is provided between the fixing portion and the guiding portion.

[0025] Preferably, the clamping portion is provided with a pin shaft, the pushing shaft of the conveying portion is provided with a through hole cooperating with the pin shaft, and the through hole is provided with an open slot, so that the pin shaft can escape from the open slot under the action of external force.

[0026] When using the hemostatic clamping device provided by the present invention, it is first necessary to transport the hemostatic clamping device to the living tissue to be hemostatic, and then apply external force through the transport part to control the clamping part to move toward the distal end of the hemostatic clamping device. At this time, the clamping part can be opened or clamped. At the same time, the clamping part can be rotated around its axial direction relative to the soft fastening sleeve until the opening of the clamping part rotates to a suitable clamping direction; then the clamping part is moved to the place to be clamped, and the transport part drives the clamping part to move toward the proximal end of the hemostatic clamping device, so that the clamping part is closed and clamped. If the clamping position is not accurate once, the operation can be repeated to make the clamping part repeatedly open and clamp until the clamping position and clamping state meet the requirements.

[0027] The external force can then be increased. Under the action of the increased external force, the clamping portion is axially movable relative to the flexible fastening sleeve. When the distance moved toward the proximal end of the delivery portion is within a certain range, the clamping portion can be repeatedly moved axially relative to the flexible fastening sleeve. When the distance moved toward the proximal end of the delivery portion relative to the flexible fastening sleeve exceeds the certain range, the external force can be further applied to move the clamping portion toward the proximal end of the delivery portion to a defined position. During the movement of the clamping portion relative to the flexible fastening sleeve, the clamping portion gradually enters the flexible fastening sleeve and forms an interference fit with the flexible fastening sleeve. The external force can then be further increased, directed toward the proximal end of the hemostatic clamp device, separating the delivery portion from the clamping portion.

[0028] Compared with the prior art, the hemostatic clamping device provided by the present invention is provided with a soft fastening sleeve, so that the clamping part can be opened, clamped, rotated, or moved axially relative to the soft fastening sleeve to maintain the clamping force, or the clamping part can be separated from the conveying part under the action of different external forces; compared with the prior art, the structure is simple, the assembly process is simplified, and the operation is convenient; and the soft fastening sleeve has a certain deformation amount, and during the processing, the processing accuracy requirements are low, which can reduce the processing cost; in addition, when the clamping part is separated from the conveying part, the clamping part needs to be moved toward its proximal end relative to the soft fastening sleeve. During the movement, the clamping part will have a part that overlaps with the soft fastening sleeve in the axial direction, which can reduce the length of the structure retained in the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0030] Figure 1 This is a schematic structural diagram of a specific embodiment of the hemostatic clamping device provided by the present invention;

[0031] Figure 2 for Figure 1 A schematic cross-sectional view of the hemostasis clamping device;

[0032] Figure 3 for Figure 2 A partial enlarged view of the middle clamping part;

[0033] Figure 4 for Figure 1 A schematic structural diagram of the clamping portion of the hemostasis clamping device;

[0034] Figure 5 for Figure 1 A schematic diagram of the structure of the hemostasis clamping device with the clamping portion in an open state and provided with a soft fastening sleeve;

[0035] Figure 6 for Figure 5 Schematic diagram of the structure of the middle clamping part without the soft fastening sleeve;

[0036] Figure 7 for Figure 5 A schematic cross-sectional view of the clamping portion of the middle sleeve provided with a soft fastening sleeve;

[0037] Figure 8 is a structural diagram of the support frame;

[0038] Figure 9Schematic diagram of the structure of the connecting ring;

[0039] Figure 10 Schematic diagram of the structure of the driving shaft.

[0040] Figure 1-10 middle:

[0041] 1 is the clamping part, 11 is the clamping arm, 12 is the movable joint, 13 is the pin, 14 is the pin shaft, 15 is the support frame, 151 is the transition surface, 2 is the conveying part, 21 is the pushing shaft, 211 is the through hole, 212 is the open groove, 22 is the traction wire, 23 is the connecting ring, 231 is the guide part, 232 is the fixing part, 233 is the ring groove, 24 is the conveying spring tube, 25 is the handle rod, 251 is the slide groove, 26 is the handle ring, 27 is the central axis positioning ring, and 3 is the soft fastening sleeve. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] The core of the present invention is to provide a hemostatic clamping device, which fixes and clamps the clamping part through a soft fastening sleeve, and the two ends of the soft fastening sleeve are respectively interference fit with the clamping part and the conveying part. The setting of the soft fastening sleeve simplifies the structure of the hemostatic clamping device, facilitates assembly and use, and the soft fastening sleeve has low precision requirements during the production process, which can reduce processing costs.

[0044] Please refer to Figure 1-10 .

[0045] The hemostatic clamping device includes a clamping part 1, a conveying part 2 and a soft fastening sleeve 3. The clamping part 1 is provided with a support frame 15 and a clamping arm 11. The conveying part 2 is provided with a connecting ring 23 for interference fit with the soft fastening sleeve 3, a pushing shaft 21 for connecting to the clamping part 1 and a traction line for pulling the pushing shaft 21 to move. The traction line can also be called a traction wire, or an operating wire, or a traction wire 22, etc.; the operating handle includes a handle rod 25 and a handle ring 26. The handle ring 26 is connected to the conveying part 2, and the handle ring 26 is movably arranged along its axial direction relative to the handle rod 25 to drive the conveying part 2 to move along its axial direction relative to the handle rod 25; the handle ring 26 drives the traction wire 22 to move or rotate axially, which can drive the pushing shaft 21 to move or rotate axially, thereby realizing the opening, clamping or axial movement and rotation of the clamping part 1.

[0046] This specific embodiment provides a hemostatic clamping device, comprising: a clamping part 1 and a conveying part 2, and the clamping part 1 and the conveying part 2 are detachably connected, and by manipulating the proximal end of the conveying part 2, the conveying part 2 can drive the clamping part 1 to open, clamp, rotate or move axially; it also includes a soft fastening sleeve 3 for accommodating the clamping part 1, one end of the soft fastening sleeve 3 is interference fit with the clamping part 1, and the other end is interference fit with the conveying part 2. When the clamping arm 11 is clamped, the outer dimension of the distal end of the clamping part 1 is greater than or equal to the outer dimension of the proximal end.

[0047] It should be noted that the external dimension of the clamping portion 1 mentioned in this specific embodiment refers to the dimension of the outermost diameter thereof, and the internal dimension refers to the maximum diameter dimension of the internal space of the flexible fastening sleeve 3 .

[0048] When using the hemostatic clamping device provided in this specific embodiment, it is first necessary to transport the hemostatic clamping device to the living tissue to be hemostatic, and then apply external force through the transporting part 2 to control the clamping part 1 to move toward the distal end of the hemostatic clamping device. In the initial state, the external force applied to the transporting part 2 is small, and the clamping part 1 is axially fixed relative to the soft fastening sleeve 3. By manipulating the transporting part 2, the clamping part 1 can be opened, clamped and rotated until the opening of the clamping part 1 is rotated to the appropriate clamping direction. Then, the clamping part 1 is moved to the place to be clamped, and the transporting part 2 is used to control the clamping part 1 to move to the distal end of the hemostatic clamping device. The conveying part 2 drives the clamping part 1 to move toward the proximal end of the hemostatic clamping device, so that the clamping part 1 is closed and clamped. If the clamping position is not accurate once, the operation can be repeated to make the clamping part 1 repeatedly open and clamp until the clamping position and clamping state meet the requirements; the external force applied to the clamping part 1 by the conveying part 2 is increased, and the clamping part 1 moves axially relative to the soft fastening sleeve 3 (when the external dimensions of the proximal end of the clamping part 1 remain unchanged over a certain axial length and the friction between the soft fastening sleeve 3 and the distal end of the conveying part 2 is greater, this relative movement is bidirectional / reversible).

[0049] The clamping portion 1 can be designed in different shapes and sizes to achieve technical effects such as being easily separated from the conveying portion 2 and being received and tightened by the soft fastening sleeve 3 .

[0050] When the outer dimension of the distal end of the clamping part 1 is larger than the outer dimension of its proximal end, when the clamping part 1 moves toward the proximal end of the soft fastening sleeve 3, the enlarged portion of the outer dimension of the distal end of the clamping part 1 enters the interior of the soft fastening sleeve 3, causing the inner dimension of the corresponding position of the soft fastening sleeve 3 to expand, and due to the material characteristics of the soft fastening sleeve 3, the inner dimensions of other parts will also expand to a certain extent, which reduces the friction between the soft fastening sleeve 3 and the distal end of the conveying part 2, making them easier to separate; if the degree of expansion of the inner dimension of the soft fastening sleeve 3 is large enough, it may have separated from the distal end of the conveying part 2 in the radial direction.

[0051] When the outer dimensions of the distal end of the clamping portion 1 are equal to the outer dimensions of its proximal end, the outer dimensions of the proximal end of the clamping portion 1 can be designed to be larger than the outer dimensions of the distal end of the delivery portion 2. This way, as the clamping portion 1 moves toward its proximal end relative to the flexible fastening sleeve 3, the outer dimensions of the proximal end of the flexible fastening sleeve 3 are expanded by the proximal end of the clamping portion 1, thereby expanding the inner dimensions of the portion where the flexible fastening sleeve 3 connects to the delivery portion 2, making them easier to separate or allowing them to separate directly. Because the flexible fastening sleeve 3 and the clamping portion 1 have an interference fit, the clamping arm 11 can still be tightened when the outer dimensions of the distal end of the clamping portion 1 are equal to the outer dimensions of its proximal end, thus achieving the basic function of the hemostatic clamping device.

[0052] Of course, to achieve the above-mentioned technical effects, the outer dimensions of the proximal end of the clamping portion 1 can also be designed to be larger than the outer dimensions of the distal end of the conveying portion 2, while also making the outer dimensions of the distal end of the clamping portion 1 larger than its proximal end. Such a gradual increase in size will cause more severe deformation of the flexible fastening sleeve 3. Therefore, the scope of disclosure and protection of this application is not limited to any one design method for the shape and size of the clamping portion 1 or a combination of multiple design methods.

[0053] The clamping portion 1 continues to move toward the proximal end of the soft fastening sleeve 3 to a set position, i.e., the separation position of the conveying portion 2 and the clamping portion 1. At this time, the clamping arm 11 in the clamped state is at least partially housed in the soft fastening sleeve 3, and the conveying portion 2 continues to increase the pulling force acting on the clamping portion 1 to separate the conveying portion 2 from the detachable part of the clamping portion 1.

[0054] It should be noted that when the distal external dimension of the clamping portion 1 is larger than its proximal external dimension, after the clamping arm 11 is received into the soft fastening sleeve 3, the internal dimension of the corresponding position of the soft fastening sleeve 3 will be enlarged, so that the soft fastening sleeve 3 has a greater tightening force on the clamping arm 11, and the clamping effect of the clamping arm 11 is also better.

[0055] Compared with the prior art, the hemostatic clamping device provided in this specific embodiment is provided with a soft fastening sleeve 3, so that the clamping part 1 can be opened, clamped, rotated, or moved axially relative to the soft fastening sleeve 3 to maintain the clamping force, or the clamping part 1 can be separated from the conveying part 2 under different external forces; compared with the prior art, the structure is simple, the assembly process is simplified, and the operation is convenient; and the soft fastening sleeve 3 has a certain deformation amount, and during the processing, the processing accuracy requirements are low, which can reduce the processing cost; in addition, when the clamping part 1 is separated from the conveying part 2, the clamping part 1 needs to be moved toward its proximal end relative to the soft fastening sleeve 3. During the movement, the clamping part 1 will have an axial overlap with the soft fastening sleeve 3, which can reduce the length of the structure retained in the human body.

[0056] It should be noted that the proximal end mentioned in this application document is the end of the device or component close to the operating end located outside the human body, and the distal end is a term relative to the proximal end. As long as it is farther from the operating end than the proximal end, it can be called the distal end.

[0057] The clamping portion 1 is provided with a support frame 15, the proximal end of which is interference-fitted with the flexible fastening sleeve 3. The clamping arm 11 is expandable and clampably connected to the distal end of the support frame 15. The flexible fastening sleeve 3 is sleeved onto the exterior of the support frame 15. During the axial movement of the support frame 15 relative to the flexible fastening sleeve 3, the friction between the two needs to be overcome.

[0058] To ensure that the clamping arm 11 can be tightened, the length of the support frame 15 can be set so that when the clamping portion 1 is separated from the conveying portion 2, the clamping arm 11 in the clamped state is at least partially retracted within the flexible fastening sleeve 3. This allows the clamping arm 11 to remain in the clamped state after the conveying portion 2 is separated from the clamping portion 1. Furthermore, the clamping portion 1 is provided with an axial overlap with the flexible fastening sleeve 3, thereby reducing the circumferential length of the portion retained in the human body.

[0059] In order to ensure that the clamping arm 11 can be further tightened after being received in the soft fastening sleeve 3, so that the clamping arm 11 maintains a certain clamping force, the external dimensions of the distal end of the clamping arm 11 in the clamped state can be made larger than the external dimensions of the support frame 15. Therefore, when the distal end of the clamping arm 11 is received in the soft fastening sleeve 3, the soft fastening sleeve 3 will be further expanded so as to tighten the clamping arm 11 and maintain a larger clamping force.

[0060] To facilitate axial movement of the support frame 15 relative to the flexible fastening sleeve 3, the outer dimensions of the distal end of the support frame 15 can be larger than the outer dimensions of the proximal end. Furthermore, a transition surface is provided on the outer surface between the distal and proximal ends of the support frame 15. The transition surface can be a conical surface or a curved surface, depending on the actual situation and will not be described in detail here. The transition surface allows the larger distal end of the support frame 15 to slide smoothly into the flexible fastening sleeve 3 during its movement into the flexible fastening sleeve 3.

[0061] The external dimension of the support frame 15 refers to the outermost diameter of the support frame 15 .

[0062] The clamping arm 11 is provided on the support frame 15 using a four-link structure, and one hinged end of the four-link structure is connected to the conveying portion 2 .

[0063] like Figure 5-7As shown, the four-bar linkage structure consists of a pair of clamping arms 11 and two movable joints 12. The movable joints 12 are hingedly connected to the push-pull ends of the clamping arms 11 to form a four-bar linkage structure. Specifically, the non-end positions of the pair of clamping arms 11 are hingedly connected, and the end positions are respectively connected to different movable joints 12. Adjacent movable joints 12 are hingedly connected to form a four-bar linkage structure. The pair of clamping arms 11 are hingedly connected, with the hinge positions located at the non-end positions of the clamping arms 11 and the same distance from the push-pull ends of the clamping arms 11; the lengths of the movable joints 12 are the same and are greater than or equal to the distance from the hinge positions of the pair of clamping arms 11 to their push-pull ends.

[0064] The setting of the four-bar structure allows the opening angle of the clamping arm 11 to be increased according to actual needs, and the maximum can be increased to infinitely close to 180°. In addition, during the opening process of the clamping arm 11, the opening angle can be strictly controlled and is basically not affected by the deformation of the clamping arm 11 itself, which can increase the controllability of the opening angle of the clamping arm 11.

[0065] Of course, the clamping arm 11 can also be set up with other structures besides the four-bar structure. For example, the clamping arm 11 can be set in a specific slide groove, and the opening and clamping of the clamping arm 11 can be controlled by controlling the movement of the clamping arm 11 along the slide groove. The specific details are determined according to actual conditions and will not be elaborated here.

[0066] like Figure 8 As shown, the distal end of the support frame 15 is provided with a U-shaped structure with an opening toward the clamping arm 11, a pair of clamping arms 11 are hinged with a pin 13, and holes cooperating with the pin 13 are provided on both sides of the U-shaped structure of the support frame 15. The proximal end of the support frame 15 is provided in the soft fastening sleeve 3, and the push shaft 21 passes through the support frame 15 and is connected to the four-bar structure.

[0067] The four-link structure and the U-shaped structure at least partially overlap in the axial direction, and in the clamped state, the surface size of the movable joint 12 exposed outside the U-shaped structure gradually increases from the proximal end to the distal end. Figure 4 In the clamped state, the axial position of the movable joint 12 at least partially overlaps with the transition surface 151. Similar to the transition surface 151, the movable joint 12 with gradually changing external dimensions can also make it easier for the clamping part 1 as a whole to slide into the soft fastening sleeve 3. Moreover, their being at the same axial position also ensures that the external contour of the clamping part 1 is smoother and easier to slide into the soft fastening sleeve 3.

[0068] On this basis, in the clamped state, the outer dimensions of the clamping arm 11 can be made equal to the outer dimensions of the distal end of the support frame 15. In this way, when the support frame 15 slides smoothly into the flexible fastening sleeve 3, the clamping arm 11 also slides in. Of course, as mentioned above, if the outer dimensions of the clamping arm 11 are larger than the outer dimensions of the distal end of the support frame, the flexible fastening sleeve 3 will exert a greater tightening force on the clamping arm 11, thereby improving the clamping effect.

[0069] The conveying part 2 is provided with a connecting ring 23 for connecting with the soft fastening sleeve 3 and a driving shaft 21 passing through the middle of the connecting ring 23 and connected to the clamping part 1. The connecting ring 23 is rotatably provided at the distal end of the conveying part 22.

[0070] During use, the proximal end of the connecting ring 23 is connected to the distal end of the delivery spring tube 24 , and the soft fastening sleeve 3 is sleeved on the outside of the connecting ring 23 so that the soft fastening sleeve 3 is fixed relative to the delivery part 2 .

[0071] like Figure 9 As shown, the connecting ring 23 includes a fixing portion 232 arranged at its proximal end and a guide portion 231 arranged at its distal end. The soft fastening sleeve 3 is sleeved on the outside of the guide portion 231 and the fixing portion 232. The outer surface of the fixing portion 232 is a cylindrical surface, which is interference fit with the soft fastening sleeve 3. The outer surface of the guide portion 231 is a conical surface whose size gradually increases from the distal end to the proximal end.

[0072] As the support frame 15 moves axially relative to the flexible fastening sleeve 3, the proximal end of the support frame 5 gradually approaches the connecting ring 23. The provision of the guide portion 231 allows the hollow cylindrical structure at the proximal end of the support frame 15 to be more easily sheathed on the outer periphery of the guide portion 231, guiding the support frame 15 toward the proximal end of the flexible fastening sleeve 3, thereby expanding the internal dimensions of the flexible fastening sleeve 3 and reducing the friction between the connecting ring 23 and the flexible fastening sleeve 3, making subsequent separation easier. Alternatively, during the expansion process, the flexible fastening sleeve 3 may have already separated radially from the connecting ring 23. These different situations can be achieved by simply adjusting the dimensions of the various structural designs.

[0073] It should be noted that the inner diameter of the hollow cylindrical structure at the proximal end of the support frame 15 is greater than or equal to the outer diameter of the guide portion 231, facilitating separation of the delivery portion 2 from the clamping portion 1 when the external force continues to increase. Preferably, the inner diameter of the hollow cylindrical structure at the proximal end of the support frame 15 can be greater than the maximum outer diameter of the guide portion 231, thereby extending the distance that the support frame 15 can move proximally relative to the flexible fastening sleeve 3 and minimizing the length of the structure retained in the body.

[0074] In order to increase the friction between the soft fastening sleeve 3 and the connecting ring 23, an annular groove 233 can be provided between the guide portion 231 and the fixing portion 232. During the interference fit between the soft fastening sleeve 3 and the connecting ring 23, the soft fastening sleeve 3 corresponding to the annular groove 233 collapses and deforms, thereby increasing the friction between the soft fastening sleeve 3 and the connecting ring 23, so as to prevent the soft fastening sleeve 3 from falling off the connecting ring 23 too easily when the clamping arm 11 is opened and closed in the early stage of operation (this can also make the axial movement of the clamping portion 1 and the soft fastening sleeve 3 bidirectional / reversible over a certain length).

[0075] In order to ensure that the clamping part 1 and the conveying part 2 can be separated smoothly and not easily, a pin 14 can be provided on the clamping part 1, and the pushing shaft 21 of the conveying part 2 is provided with a through hole 211 that cooperates with the pin 14. The through hole 211 is provided with an open groove 212, and the size of the open groove 212 is smaller than the diameter of the through hole 211 and also smaller than the diameter of the pin 14. When the external force is less than a certain value, the pin 14 cooperates with the through hole 211 and will not fall out of the through hole 211. When the external force increases to a certain value, the pin 14 falls out of the open groove 212 and overcomes the friction between the connecting ring 23 and the soft fastening sleeve 3 to separate the conveying part 2 from the clamping part 1. At this time, the soft fastening sleeve 3 remains outside the clamping part 1 due to the large friction between it and the distal end of the clamping part 1, thereby accommodating and fastening the clamping arm 11.

[0076] It should be noted that the clamping arm 11 mentioned in the present application can be any one of the various clamp arms in the prior art to adapt to different wounds and functional requirements.

[0077] It should be noted that while the flexible fastening sleeve 3 is elastically deformable in the radial direction, it still maintains a certain strength in the axial direction to allow the support frame 15 to move smoothly along its axial direction, especially to prevent the flexible fastening sleeve 3 from bending or even stacking during proximal movement. The flexible fastening sleeve 3 can be made of a biocompatible material to reduce adverse reactions caused by the retained clamping portion 1.

[0078] In addition, the hemostatic clamping device of the present application also has some conventional parts in the field. The delivery part 2 also includes a delivery spring tube 24 that is sleeved on the outer periphery of the traction wire 22. The provision of the delivery spring tube 24 can reduce the friction of the hemostatic clamping device in the endoscope clamp channel, protect the clamp channel tube, and enhance the control performance. The traction wire 22 is connected to the handle ring 26 through the central axis positioning ring 27. The handle rod 25 is provided with a slide groove 251. The length direction of the slide groove 251 is arranged along its axial direction. The handle ring 26 is slidably arranged in the slide groove 251. The traction wire 22 is welded to the driving shaft 21. The traction wire 22 can be nickel-titanium wire or twisted steel wire. Of course, it can also be other materials that meet the requirements, which is determined according to actual conditions.

[0079] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other. Any combination of all the embodiments provided by the present invention is within the scope of protection of this invention and will not be described in detail here.

[0080] The above is a detailed introduction to the hemostatic holding device provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in several ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A hemostatic clamping device, comprising a detachably connected clamping portion (1) and a conveying portion (2), characterized in that: It also includes a soft fastening sleeve (3) for accommodating the clamping arm (11) of the clamping portion (1), and the two ends of the soft fastening sleeve (3) are respectively sleeved on the proximal end of the clamping portion (1) and the distal end of the conveying portion (2) in an interference fit; when the clamping arm (11) is clamped, the external dimension of the distal end of the clamping portion (1) is greater than or equal to the external dimension of the proximal end thereof; In the initial state, the clamping portion (1) is fixed axially relative to the soft fastening sleeve (3), and the conveying portion (2) can drive the clamping portion (1) to open or clamp; When the external force of the conveying portion (2) acting on the clamping portion (1) increases, the clamping portion (1) moves relative to the soft fastening sleeve (3) in the axial direction; When the clamping portion (1) continues to move toward the proximal end of the soft fastening sleeve (3) to a set position, the clamping arm (11) in the clamped state is at least partially received in the soft fastening sleeve (3), the clamping portion (1) expands the internal size of the soft fastening sleeve (3), and the conveying portion (2) increases the pulling force acting on the clamping portion (1) to separate the conveying portion (2) from the clamping portion (1); The clamping portion (1) is provided with a support frame (15), the proximal end of the support frame (15) is interference-fitted with the soft fastening sleeve (3), and the clamping arm (11) is openably and clampably connected to the distal end of the support frame (15).

2. The hemostatic clamping device according to claim 1, characterized in that: The outer dimensions of the distal end of the clamping portion (1) are equal to the outer dimensions of the proximal end thereof, and the inner diameter of the proximal end of the clamping portion (1) is greater than the outer dimensions of the distal end of the conveying portion (2), so that when the proximal end of the clamping portion (1) moves to the proximal end of the soft fastening sleeve (3), the inner dimensions of the proximal end of the soft fastening sleeve (3) are expanded.

3. The hemostatic clamping device according to claim 1, characterized in that: The outer dimensions of the distal end of the clamping arm (11) in the clamped state are larger than the outer dimensions of the support frame (15).

4. The hemostatic clamping device according to claim 1, characterized in that: The outer dimension of the distal end of the support frame (15) is larger than the outer dimension of the proximal end thereof, and when the distal end of the support frame (15) moves into the soft fastening sleeve (3), the inner dimension of the soft fastening sleeve (3) is expanded.

5. The hemostatic clamping device according to claim 4, characterized in that: The outer surface between the distal end and the proximal end of the support frame (15) is provided with a transition surface with a changing external dimension.

6. The hemostatic clamping device according to claim 1, characterized in that: The clamping arm (11) is arranged on the support frame (15) using a four-link structure, and one hinged end of the four-link structure is connected to the conveying portion (2).

7. The hemostatic clamping device according to claim 6, characterized in that: The four-link structure is composed of a pair of clamping arms (11) and a movable joint (12), and the movable joint (12) is hingedly connected to the push-pull end of the clamping arm (11) to form the four-link structure; The support frame (15) is connected to the hinge of the clamping arm (11).

8. The hemostatic clamping device according to claim 7, characterized in that: The distal end of the support frame (15) is provided with a U-shaped structure with an opening toward the clamping arm (11), the four-link structure and the U-shaped structure at least partially overlap in the axial direction, and in the clamped state, the surface size of the movable joint (12) exposed outside the U-shaped structure gradually expands from its proximal end to the distal end.

9. The hemostatic clamping device according to claim 8, characterized in that: In the clamped state, the outer dimensions of the clamping arm (11) are equal to the outer dimensions of the distal end of the support frame (15).

10. The hemostatic clamping device according to any one of claims 3 to 9, characterized in that: The conveying portion (2) is provided with a connecting ring (23) for connecting with the soft fastening sleeve (3) and a driving shaft (21) passing through the middle of the connecting ring (23) and connected to the clamping portion (1); the connecting ring (23) is rotatably arranged at the distal end of the conveying portion (2).

11. The hemostatic clamping device according to claim 10, characterized in that: The connecting ring (23) comprises a fixing portion (232) arranged at its proximal end and a guiding portion (231) arranged at its distal end; the soft fastening sleeve (3) is sleeved on the outside of the fixing portion (232) and the guiding portion (231); the outer surface of the fixing portion (232) is a cylindrical surface, which is interference-fitted with the soft fastening sleeve (3); and the outer surface of the guiding portion (231) is a conical surface whose size gradually increases from the distal end to the proximal end.

12. The hemostatic clamping device according to claim 11, characterized in that: The proximal end of the support frame (15) is a hollow cylindrical structure, and the inner diameter of the hollow cylindrical structure is greater than or equal to the outer diameter of the guide portion (231).

13. The hemostatic clamping device according to claim 11, characterized in that: An annular groove (233) is provided between the fixing portion (232) and the guiding portion (231).

14. The hemostatic clamping device according to any one of claims 1 to 9, characterized in that: The clamping portion (1) is provided with a pin shaft (14), the pushing shaft (21) of the conveying portion (2) is provided with a through hole (211) that cooperates with the pin shaft (14), and the through hole (211) is provided with an open groove (212) so that the pin shaft (14) can be disengaged from the open groove (212) under the action of an external force.

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