Clamping and closing instrument

Abstract

The invention relates to the technical field of medical instruments, in particular to a clamping instrument which comprises an operation assembly, a connecting assembly and a clamp assembly. Wherein the clamp assembly comprises a clamp tube, a clamping piece, a fixed seat, a rotating ring seat, an embedded rotating ring and a connecting shaft; the clamping piece is fixed on the fixed seat, the fixed seat is movably arranged in the clamp tube, and a padlock part is arranged in the clamp tube; the embedded rotating ring is movably arranged in the rotating ring seat, and an elastic hook is arranged on the embedded rotating ring; and the connecting shaft is fixedly connected with the mandrel, penetrates through the embedded rotating ring and is detachably connected with the fixed seat, and meanwhile, the connecting shaft is propped against the elastic hook, so that the elastic hook expands outwards and is clamped with the inner wall of the clamp tube or the padlock part. According to the invention, effective transmission of axial movement and circumferential rotation between the operation assembly and the clamping piece is realized; and meanwhile, the part of the clamping piece on the clamping and closing instrument and the other clamping parts of the clamping and closing instrument can be rapidly and efficiently repeatedly loaded, the probability of assembly failure can be reduced, and the use stability after reloading is effectively guaranteed.

Description

Technical Field

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

[0002] With the development of endoscopic and other related technologies, hemostatic clipping is now used to treat gastrointestinal bleeding. In practice, the hemostatic clipping method involves inserting the clipping mechanism of the hemostatic clip into the patient's gastrointestinal tract through the working channel of the endoscope. When the clipping mechanism reaches the pre-operative position in the patient's body, the handle operating part is activated to generate a clamping force to stop bleeding or clamp the surgical wound.

[0003] Existing hemostatic clips are generally divided into two categories: integrated clip devices and detachable clip devices. Integrated clips are designed for single use, meaning that once the clamp is released, the entire hemostatic clip cannot be reused. Detachable clips, on the other hand, have replaceable, reusable clamps. After the previous clamp is released, a new clamp can be installed and reused.

[0004] Existing detachable clamp instruments have certain drawbacks. To enable reloadable clamps, the clamp requires a complex connection design between the clamp and the main body. Investigations have shown that existing connection designs are often complex, and this complex interface significantly increases assembly time. Furthermore, the reloading process for detachable instruments must be completed in real time during surgery, which directly impacts surgical efficiency (extending surgery time) and can increase the risk of tissue exposure due to delays.

[0005] In addition, since the parts of the hemostatic clip are complex and precise and small in size, and the interfaces between the parts are very complicated and cumbersome, it is easy to cause unsuccessful assembly and malfunction of the device after assembly.

[0006] In summary, existing split-type clip instruments have the disadvantages of long reloading time, low efficiency, and poor assembly stability. Summary of the Invention

[0007] In response to the technical problems of defects in existing clamp instruments, the present invention provides a clamping instrument, which realizes the effective transmission of axial movement and circumferential rotation between the operating component and the clamp through the combination of a clamp tube, a fixing seat, a swivel seat, an embedded swivel and a connecting shaft; at the same time, this combination enables the part with the clamp on the clamping instrument to be quickly and efficiently repeatedly loaded with the remaining clamping parts of the clamping instrument, and can reduce the probability of assembly failure, effectively ensuring the stability of the clamp part after reloading.

[0008] The technical solution provided by the present invention is as follows: a clamping instrument, comprising an operating assembly, a connecting assembly and a clamp assembly; the operating assembly comprises a handle and an operating portion on the handle, the connecting assembly comprises a flexible tube and a core shaft, the flexible tube is sleeved on the outside of the core shaft, one end of the flexible tube is fixedly connected to the handle, and the operating portion is fixedly connected to one end of the core shaft; the clamp assembly comprises a clamp tube, a clamping piece, a fixing seat, a swivel seat, an embedded swivel and a connecting shaft; the clamping piece is fixed on the fixing seat, the fixing seat is movably arranged in the clamp tube, and a padlock portion is arranged in the clamp tube; the swivel The ring seat is located on one side of the fixed seat, and the embedded swivel is movably arranged in the swivel seat. Elastic hooks are evenly arranged on the embedded swivel along the circumference, and the elastic hooks are tilted and converged toward the center direction of the embedded swivel, and the ends of the elastic hooks face outward; the connecting shaft is fixedly connected to the other end of the core shaft so that the connecting shaft moves synchronously with the operating part through the core shaft, and the connecting shaft passes through the embedded swivel and is detachably connected to the fixed seat, and at the same time, the connecting shaft abuts against the elastic hook so that the elastic hook expands outward and is clamped with the inner wall of the clamp tube or the padlock part.

[0009] Optionally, a restraint is fixedly provided inside the clamp tube, and the restraint is located on the side of the padlock portion close to the swivel seat. The restraint includes elastic baffles, which are evenly distributed along the circumference, and the ends of the elastic baffles all point to the center of the restraint; when the connecting shaft passes through the embedded swivel and is detachably connected to the fixed seat, the elastic hook passes through the restraint, and the elastic baffle abuts against the elastic hook.

[0010] Optionally, the width of the elastic blocking piece gradually decreases from the root to the end.

[0011] Optionally, the arrangement density of the elastic blocking pieces is greater than or equal to the arrangement density of the elastic hooks.

[0012] Optionally, a flexible pad is provided in the clamp tube, and when the elastic hook expands outward and has a tendency to abut against the inner wall of the clamp tube, the end of the elastic hook is embedded in the flexible pad.

[0013] Optionally, a through groove is provided on the side of the fixing seat close to the embedded swivel, and the through groove extends toward the side away from the embedded swivel, so that part of the fixing seat is divided into a first elastic petal and a second elastic petal; a first type groove is provided on the first elastic petal, and a second type groove is provided on the second elastic petal, and the first type groove and the second type groove correspond to each other to form a retreat-proof groove; a retreat-proof boss is provided at the end of the connecting shaft, and the retreat-proof groove and the retreat-proof boss form a retreat-proof connection.

[0014] Optionally, at least two inwardly protruding limiting portions are evenly arranged on the clamp tube along the circumference, and the limiting portions abut against the outer wall of the fixing seat.

[0015] Optionally, a rotating connecting section is provided on the connecting shaft near the stop boss; a first mating groove is provided on the first elastic petal, and a second mating groove is provided on the second elastic petal. The first mating groove and the second mating groove are combined to form a rotating connecting groove, and the rotating connecting groove is coupled with the rotating connecting section.

[0016] Optionally, a connecting portion is provided on the fixing seat, and the tail of the clip is connected to the connecting portion through a pin; a hanging platform is provided at the tail of the clip, and a positioning portion is provided on the inner wall of the clamp tube, and the positioning portion is used to be clamped with the hanging platform.

[0017] Optionally, the operating part includes a push-pull block and a roller, the push-pull block is slidably arranged on the handle, the roller is rotatably arranged on the handle, the core shaft passes through the roller and is fixedly connected to the roller, and one end of the core shaft is fixedly connected to the push-pull block.

[0018] The technical solution provided by the present invention has the following beneficial effects compared with the existing technology: in response to the technical problems of defects in existing clamp instruments, the present invention realizes the effective transmission of axial movement and circumferential rotation between the operating component and the clamp through the combination arrangement of the clamp tube, the fixing seat, the swivel seat, the embedded swivel and the connecting shaft; at the same time, this combination arrangement enables the part with the clamp on the clamping instrument to be quickly and efficiently repeatedly loaded with the remaining clamping parts of the clamping instrument, and can reduce the probability of assembly failure, effectively ensuring the stability of the clamp part after reloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the clamping device proposed in an embodiment of the present invention.

[0020] Figure 2 This is one of the structural schematic diagrams of the clip assembly proposed in an embodiment of the present invention.

[0021] Figure 3 This is one of the structural schematic diagrams of the embedded swivel proposed in an embodiment of the present invention.

[0022] Figure 4 This is the second structural schematic diagram of the clip assembly proposed in an embodiment of the present invention.

[0023] Figure 5 for Figure 3 A partial cross-sectional schematic diagram of an embodiment.

[0024] Figure 6This is the second structural diagram of the embedded swivel proposed in an embodiment of the present invention.

[0025] Figure 7 This is a schematic structural diagram of a restraining member proposed in an embodiment of the present invention.

[0026] Figure 8 This is a schematic diagram of the partial structure of the clip assembly proposed in an embodiment of the present invention.

[0027] Figure 9 This is a schematic cross-sectional view of the local structure of the clip assembly proposed in an embodiment of the present invention.

[0028] Figure 10 This is a schematic structural diagram of the connecting shaft proposed in an embodiment of the present invention.

[0029] Figure 11 This is a schematic three-dimensional diagram of the partial structure of the clip assembly proposed in an embodiment of the present invention.

[0030] Figure 12 This is one of the structural schematic diagrams of the fixing base proposed in an embodiment of the present invention.

[0031] Figure 13 This is the second structural schematic diagram of the fixing base proposed in an embodiment of the present invention.

[0032] Figure 14 This is one of the structural schematic diagrams of the clamp tube proposed in an embodiment of the present invention.

[0033] Figure 15 This is the second structural schematic diagram of the clamp tube proposed in an embodiment of the present invention.

[0034] Figure 16 This is one of the schematic diagrams of the clip release process proposed in an embodiment of the present invention.

[0035] Figure 17 This is the second schematic diagram of the clip release process proposed in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments.

[0037] The present application will be further described below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended solely to illustrate the relevant inventions and are not intended to limit the inventions. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the drawings. Terms such as "first" and "second" in the present application are provided for the convenience of describing the technical solutions of the present invention and do not have a specific limiting effect. They are general references and do not constitute a limitation on the technical solutions of the present invention. It should be noted that the embodiments and features therein in the present application may be combined with each other unless there is a conflict. In the description of the present invention, it should be noted that terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a communication between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not have contradictions or conflicts, all of which are within the scope of protection required by the present invention.

[0038] Combined with attachment Figure 1 To the attached Figure 17 This embodiment provides a clamping instrument comprising an operating assembly, a connecting assembly, and a clamp assembly. The operating assembly comprises a handle 70 and an operating portion on the handle 70. The connecting assembly comprises a flexible tube 80 and a core shaft 81. The flexible tube 80 is sleeved onto the outside of the core shaft 81, with one end of the flexible tube 80 fixedly connected to the handle 70, and the operating portion fixedly connected to one end of the core shaft 81. The clamp assembly comprises a clamp tube 1, a clip 2, a fixing seat 3, a swivel seat 82, an embedded swivel 83, and a connecting shaft 4.

[0039] Generally, during a surgical operation, the operator needs to hold the handle 70 and insert the connecting assembly together with the clip assembly into the endoscope channel to deliver the clip assembly to the vicinity of the diseased tissue in the patient's body.

[0040] In a preferred embodiment, the operating portion includes a push-pull block 71 and a roller 72. The push-pull block 71 is slidably mounted on the handle 70, and the roller 72 is rotatably mounted on the handle 70. A core shaft 81 passes through the roller 72 and is fixedly connected to the roller 72. One end of the core shaft 81 is fixedly connected to the push-pull block 71. The core shaft 81 is generally a metal wire. Therefore, when the operator holds the handle 70, they can push or pull the push-pull block 71, driving the core shaft 81 to translate and rotate, thereby driving the axial movement and rotation of the connecting shaft 4 and the fixing seat 3, thereby completing the clamping and rotation control of the clip 2.

[0041] In this embodiment, the clamp assembly includes a clip 2 secured to a mounting base 3, typically made of a high-strength engineering plastic such as PC. The mounting base 3 is movably mounted within a clamp tube 1, which includes a padlock 103. The clamp tube 1 can be made of metal, such as stainless steel. A swivel base 82 is positioned on one side of the mounting base 3, and an embedded swivel 83 is movably mounted within the base. Elastic hooks 830 are uniformly arranged along the circumference of the embedded swivel 83. These hooks 830 are angled and converge toward the center of the embedded swivel 83, with their ends facing outward.

[0042] In this embodiment, the clip 2 can be made of stainless steel and has the elasticity to expand outward. The principle of the clip 2 to achieve clamping control is: when the fixed seat 3 moves axially along the inside of the clamp tube 1 along the connecting shaft 4, the clip 2 will be retracted into the clamp tube 1 or pushed out of the clamp tube 1. When the clip 2 is partially or completely retracted into the clamp tube 1, the clip 2 will be contracted due to the restraining effect of the clamp tube 1; when the clip 2 is pushed out of the clamp tube 1, the clip 2 will naturally open.

[0043] The connecting shaft 4 is fixedly connected to the other end of the core shaft 81 so that the connecting shaft 4 moves synchronously with the operating part through the core shaft 81. The connecting shaft 4 passes through the embedded swivel 83 and is detachably connected to the fixed seat 3. At the same time, the connecting shaft 4 abuts against the elastic hook 830 so that the elastic hook 830 expands outward and engages with the inner wall of the clamp tube 1 or the padlock part 103.

[0044] The swivel seat 82 in this embodiment is both a structure for accommodating the embedded swivel 83 and a structure for connecting to the clamping instrument. In this embodiment, the operating component of the clamping instrument, its handle 70 is fixedly connected to the swivel seat 82 through the flexible tube 80.

[0045] For the clamping device of this embodiment, when it is actually used, the connecting shaft 4 needs to pass through the embedded swivel 83 and be detachably connected to the fixing seat 3 located in the clamp tube 1. Generally, the connecting shaft 4 and the fixing seat 3 can be detachably connected by magnetic attraction or by snap-fit.

[0046] When the connecting shaft 4 passes through the inset swivel 83, the elastic hooks 830 are inclined and converged toward the center of the inset swivel 83. Therefore, the connecting shaft 4 abuts the inner side of the elastic hooks 830, exerting a radial (outward) force on the elastic hooks 830, causing the elastic hooks 830, which are evenly distributed along the circumference, to expand outward. The outward expansion of the elastic hooks 830 drives their outward ends toward the inner wall of the clamp tube 1 until they abut against the inner wall of the clamp tube 1.

[0047] As can be understood, when the elastic hook 830 expands outward sufficiently, the end of the elastic hook 830 abuts against the inner wall of the clamp tube 1, generating sufficient friction. This sufficient friction secures the connection between the embedded swivel 83 and the clamp tube 1, forming a tension fit. When this connection is established, the circumferential rotation of the connecting shaft 4 is transmitted to the embedded swivel 83, which in turn transmits it to the clamp tube 1. Simultaneously, because the connecting shaft 4 is connected to the fixing base 3, it can drive the rotation of the clip 2.

[0048] In this embodiment, the clamp tube 1 is further provided with a padlock 103. The padlock 103 can be a step provided within the clamp tube 1. For example, a retaining ring embedded within the clamp tube 1 forms a natural step between the retaining ring and the clamp tube 1. Since the end of the elastic hook 830 faces outward, the step can engage with the elastic hook 830 to form an axially restrained connection when the clamp tube 1 and the embedded swivel 83 tend to separate from each other. Alternatively, the padlock 103 can be a groove formed in the inner wall of the clamp tube 1, into which the elastic hook 830 can be inserted, forming an axially restrained connection. In other words, the provision of the padlock 103 can limit the axial movement of the elastic hook 830, thereby preventing the swivel seat 82 from axially separating from the clamp tube 1.

[0049] When the above assembly is completed, it can be used for surgical treatment. During the treatment process, the operator needs to hold the handle 70, first insert the connecting assembly together with the clamp assembly into the endoscope clamp channel, and then transport the clamp assembly to the vicinity of the diseased tissue in the patient's body through the clamp channel. With the help of the endoscope, the operator controls the pushing and pulling block 71 to control the pulling and pulling movement of the core shaft 81, thereby controlling the axial movement of the fixing seat 3 through the connecting shaft 4 to open or close the clip 2. At the same time, the rotation of the mandrel 81 can be driven to rotate by manipulating the roller 72, thereby driving the fixing seat 3 and the clip 2 to rotate synchronously through the connecting shaft 4 to adjust the position and angle of the clip 2. After the position of the clip 2 is adjusted appropriately, the pushing and pulling block 71 can be manipulated to clamp the diseased tissue with the clip 2.

[0050] After the clip 2 clamps the affected area, continue to pull the push-pull block 71 to fully retract the clip 2 into the clamp tube 1. Since the clip 2 that clamps the diseased tissue is larger in size after closing, it will be firmly stuck in the clamp tube 1. Therefore, when the applied pulling force is large enough, the connection between the fixing base 3 and the clip 2 will be broken, and the clip 2 can be disconnected from the fixing base 3.

[0051] Continue pulling the mandrel 81, and it will drive the connecting shaft 4 out of the clamp tube 1 and the swivel seat 82. Because the elastic hook 830 on the embedded swivel 83 always has a tendency to recover due to its own elastic deformation, when the connecting shaft 4 is withdrawn from the embedded swivel 83, the end of the elastic hook 830 will converge toward the axial centerline of the embedded swivel 83, thereby releasing the engagement with the clamp tube 1. At this point, the clamp tube 1 is disconnected from the embedded swivel 83. At the same time, because the clip 2 and the clamp tube 1 are fixed together, only the clip 2 and the clamp tube 1 will remain at the diseased tissue.

[0052] Continue to pull the flexible tube 80 in the connecting assembly, and the swivel seat 82 and the embedded swivel 83 therein can be completely separated from the clamp tube 1, thereby completely realizing the release operation of the clamp 2. Figure 2 and attached Figure 5 A limiting step is provided at the end of the swivel seat 82, and the limiting step is used to abut against the boss of the outer ring of the embedded swivel 83, thereby limiting the movement of the embedded swivel 83 toward the clamp tube 1, and also ensuring that the swivel seat 82 and the embedded swivel 83 are pulled out of the clamp tube 1 together with the flexible tube 80.

[0053] Once the fixing base 3, swivel base 82, embedded swivel 83, and connecting shaft 4 are removed, the clip assembly can be reloaded. First, remove the fixing base 3 of the previous clamp assembly remaining on the connecting shaft 4. Then, remove the replacement clip assembly module consisting of the clamp tube 1, clip 2, and fixing base 3. Connect the connecting shaft 4 to the new fixing base 3 to complete the reloading process and proceed with the subsequent surgical procedure.

[0054] Obviously, the above-mentioned repeated assembly process can be repeated multiple times during the operation, that is, the clamping instrument of this embodiment realizes repeated loading of the relevant parts of the clip 2 by repeating the above-mentioned assembly steps.

[0055] When the number of repeated loading is large, the elastic hook 830 on the embedded swivel 83 will gradually fatigue due to the repeated expansion and reset process, and will gradually lose the ability to converge and reset toward the center direction of the embedded swivel 83. When this reset ability disappears, the clamp tube 1 may not be able to detach from the embedded swivel 83.

[0056] To address this issue, in a preferred embodiment, a restraining member 9 is fixedly installed within the clamp tube 1. This restraining member 9 is located on the side of the padlock portion 103 near the swivel seat 82. The restraining member 9 includes elastic retaining plates 90 that are evenly distributed along the circumference, with their ends pointing toward the center of the restraining member 9. When the connecting shaft 4 passes through the embedded swivel 83 and is removably connected to the fixing seat 3, the elastic hook 830 passes through the restraining member 9 and abuts against the elastic retaining plates 90.

[0057] In this embodiment, the connecting shaft 4 not only passes through the embedded swivel 83 , but also passes through the restraining member 9 . The elastic blocking piece 90 on the restraining member 9 that is pushed open also has a tendency to reset.

[0058] Therefore, it can be understood that when the elastic blocking piece 90 and the elastic hook 830 abut, the return tendency of the elastic blocking piece 90 will drive the return of the elastic hook 830. Therefore, even if the elastic hook 830 on the embedded swivel 83 gradually fatigues and gradually loses its return ability, the elastic blocking piece 90 will ensure the return of the elastic hook 830. Moreover, even when the elastic hook 830 is not obviously fatigued, the elastic blocking piece 90 will continue to provide the aforementioned force on the elastic hook 830, assisting in the return of the elastic hook 830. This assistance can also delay the fatigue of the elastic hook 830. In short, the provision of the restraining member 9 extends the service life of the elastic hook 830 and, to a certain extent, increases the number of times the clip assembly can be repeatedly loaded.

[0059] Furthermore, because the restraining member 9 is fixed within the clamp tube 1 and the connecting shaft 4 needs to pass through the restraining member 9, friction exists between the connecting shaft 4 and the restraining member 9, which also helps transmit motion between the clamp tube 1 and the connecting shaft 4. Furthermore, the elastic hook 830 needs to pass through the elastic blocking piece 90, and the two also achieve a detachable connection, which also helps strengthen the connection between the clamp tube 1 and the embedded swivel 83.

[0060] Combined with the above embodiments and the attached Figure 9 and attached Figure 15 The padlock portion 103 can be a step provided within the clamp tube 1. This step is naturally formed by a retaining ring embedded within the clamp tube 1. The retaining ring further secures the restraining member 9 to the inner wall of the retaining ring. In another embodiment, the outer contour of the restraining member 9 has a certain thickness, forming a step with the inner wall of the clamp tube 1. In other words, the padlock portion 103 is formed by the difference in height between the outer contour of the restraining member 9 and the inner wall of the clamp tube 1.

[0061] Combined with attachment Figure 7In a preferred embodiment, the width of the elastic baffle 90 gradually decreases from the root to the end. This design form structurally enables the elastic baffle 90 to constitute a nonlinear stiffness design, so that the elastic baffle 90 has better elasticity and a longer service life.

[0062] And, in a preferred embodiment, the arrangement density of the elastic baffle 90 is greater than or equal to the arrangement density of the elastic hook 830. At this time, the elastic baffle 90 has better rebound ability and better life, and can abut against the elastic hook 830 more evenly to ensure the uniform reset of the elastic hook 830.

[0063] Combined with the above assembly principle description and the attached Figure 15 In a further embodiment, a flexible pad 104 may be further provided in the clamp tube 1 , and when the elastic hook 830 expands outward and has a tendency to abut against the inner wall of the clamp tube 1 , the end of the elastic hook 830 is embedded in the flexible pad 104 .

[0064] Specifically, a flexible pad 104 is provided within the clamp tube 1 near the padlock portion 103. When the elastic hook 830 expands outward to form a tension-tight fit between the embedded swivel 83 and the clamp tube 1, the end of the elastic hook 830 can be embedded in the flexible pad 104. Of course, if the padlock portion 103 is stepped, the end of the elastic hook 830 may also be embedded between the flexible pad 104 and the padlock portion 103. The flexible pad 104 is generally made of a polymer material, such as silicone or TPE.

[0065] In short, when the end of the elastic hook 830 moves toward the inner wall of the clamp tube 1 as the elastic hook 830 expands, the end of the elastic hook 830 realizes an assembly connection with the clamp tube 1 by embedding in the flexible pad 104. This embedding form also increases the force between the elastic hook 830 and the inner wall of the clamp tube 1, which can make the axial connection and rotation transmission between the embedded swivel 83 and the clamp tube 1 more reliable.

[0066] In this embodiment, there are various forms of detachable connection between the connecting shaft 4 and the fixing seat 3. For example, as listed in the above description, a magnetic connection can be formed between the two. When the connecting shaft 4 and the fixing seat 3 are attracted, the movement and rotation of the connecting shaft 4 can drive the movement and rotation of the fixing seat 3; when the force applied by the operator to separate the two is greater than the magnetic attraction between the two, the two can be separated, that is, the fixing seat 3 at the head of the connecting shaft 4 is removed.

[0067] In other embodiments, the connecting shaft 4 and the fixing seat 3 can be connected by a snap-fit connection. When combined, the two are locked to each other through various snap-fit mechanisms, and the movement and rotation of the connecting shaft 4 can drive the movement and rotation of the fixing seat 3; when the operator needs to separate the connecting shaft 4 and the fixing seat 3 from each other, the contact snap-fit connection can be used to separate the two from each other.

[0068] In a preferred embodiment, the connecting shaft 4 and the fixing seat 3 are connected by plugging to form a detachable locking connection. This embodiment is specifically manifested as follows: Figure 12 and attached Figure 13 A through slot 300 is provided on the side of the fixed seat 3 near the embedded swivel 83. The through slot 300 extends away from the embedded swivel 83, thereby partially dividing the fixed seat 3 into a first elastic petal 301 and a second elastic petal 302. The first elastic petal 301 is provided with a first groove, and the second elastic petal 302 is provided with a second groove. The first and second grooves correspond to each other and form a retaining groove 303. A retaining boss 400 is provided at the end of the connecting shaft 4. The retaining groove 303 and the retaining boss 400 form a retaining connection.

[0069] In this embodiment, the first elastic petal 301 and the second elastic petal 302 formed after the through groove 300 is set on the fixing seat 3 can have good elasticity. When the backstop boss 400 at the head of the connecting shaft 4 is gradually inserted into the backstop groove 303 on the fixing seat 3, the first elastic petal 301 and the second elastic petal 302 will move away from each other due to the force, providing space for the insertion of the backstop boss 400.

[0070] After the anti-retraction boss 400 is completely inserted into the anti-retraction groove 303, the first elastic petal 301 and the second elastic petal 302 will restore their elastic deformation. At this time, the fixing seat 3 will cooperate with the connecting shaft 4. When the connecting shaft 4 moves axially, the fixing seat 3 will also move axially, and the clip 2 will also open and close accordingly.

[0071] In a general configuration, the retaining groove 303 and the retaining boss 400 form an interference fit, that is, the first elastic petal 301 and the second elastic petal 302 after reset will clamp the retaining boss 400 of the connecting shaft 4. At this time, when the connecting shaft 4 rotates circumferentially, it can drive the fixing seat 3 to rotate circumferentially. When a clip 2 is provided on the fixing seat 3, the clip 2 will also rotate with the rotation of the fixing seat 3.

[0072] To achieve a retraction-proof connection, the structural profile of the retraction boss 400 is generally designed to be relatively easy to insert into the retraction-proof groove 303 but more difficult to remove from the retraction-proof groove 303, and the retraction-proof groove 303 must also be matched. The retraction boss 400 can be a series of n conical or terraced structures (n is a positive integer) arranged axially, with the tops of the conical or terraced structures facing the side where the clip 2 is located, and the bottoms of the conical or terraced structures facing the side where the swivel seat 82 is located. This ensures that the retraction boss 400 can be easily inserted into the retraction-proof groove 303 when the connecting shaft 4 moves toward the fixed seat 3, while the retraction boss 400 is difficult to disengage from the retraction-proof groove 303 when the connecting shaft 4 moves away from the fixed seat 3.

[0073] In some preferred embodiments, n is greater than 1, for example, n is 2. In this case, the presence of multiple conical or terraced structures further enhances the stability of the connection between the connecting shaft 4 and the fixing seat 3, and can further ensure the clamping force of the clip 2.

[0074] Alternatively, the stop boss 400 can also constitute a mechanism similar to a ratchet or barb, so that when the stop boss 400 is inserted, the stop groove 303 undergoes elastic deformation, and the stop boss 400 can pass through; when the stop boss 400 is fully inserted, the stop groove 303 returns to its original state, and a mechanical barrier is formed between the stop groove 303 and the stop boss 400 to prevent reverse separation.

[0075] It is understandable that the radial dimension of the fixing seat 3 must be smaller than the inner diameter of the clamp tube 1 so that the fixing seat 3 can move freely within the clamp tube 1, drive the clip 2 to retract or extend from the clamp tube 1, or drive the clip 2 to rotate freely. In combination with the aforementioned embodiment, the radial dimension of the fixing seat 3 must be smaller than the inner diameter of the clamp tube 1, which is also used to ensure that the first elastic petal 301 and the second elastic petal 302 have sufficient deformation space. However, if the radial dimension of the fixing seat 3 is very small as a whole, it will increase the difficulty of processing, manufacturing and assembly, and an overly small fixing seat 3 will shake within the clamp tube 1, causing the fixing seat 3 to be eccentric, thereby further affecting the assembly connection between the fixing seat 3 and the connecting shaft 4.

[0076] Therefore, combined with the Figure 14 and attached Figure 15 In one embodiment, at least two inwardly protruding limiting portions 100 are evenly arranged on the clamp tube 1 along the circumference, and the limiting portions 100 abut against the outer wall of the fixing seat 3.

[0077] In this embodiment, the limiting portion 100 can be a protruding structure that is recessed inwardly on the wall surface of the clamp tube 1. The limiting portion 100 abuts against the fixing seat 3 to limit the fixing seat 3, thereby improving the shaking and eccentricity of the fixing seat 3 in the clamp tube 1, so as to ensure that the fixing seat 3 and the connecting shaft 4 are more accurate and reliable during assembly and connection.

[0078] In combination with the above description, it can be seen that after the connecting shaft 4 and the fixed seat 3 are detachably connected, the rotation of the connecting shaft 4 can drive the rotation of the fixed seat 3. For example, when the connecting shaft 4 and the fixed seat 3 are connected in the form of magnetic attraction, the friction force generated by the magnetic attraction is a necessary condition for the transmission of rotation between the two. Based on the above embodiment, when the retaining groove 303 and the retaining boss 400 form a retaining connection, the retaining boss 400 on the connecting shaft 4 can be tightly clamped by the retaining groove 303, so that there is sufficient friction between the connecting shaft 4 and the fixed seat 3 to drive the fixed seat 3 to rotate when the connecting shaft 4 rotates.

[0079] In a preferred embodiment, a rotating connecting section 401 is provided on the connecting shaft 4 near the stop boss 400; a first matching groove is provided on the first elastic petal 301, and a second matching groove is provided on the second elastic petal 302. The first matching groove and the second matching groove are combined to form a rotating connecting groove 304, and the rotating connecting groove 304 is coupled with the rotating connecting section 401.

[0080] Specifically, the rotating connection section 401 can be a flat square, and the inner wall profile of the rotating connection groove 304 is a flat hole matching the flat square. The cooperation between the flat square and the flat hole can further ensure the transmission of the rotational motion.

[0081] In addition, the coupling formed between the rotating connecting section 401 and the rotating connecting groove 304 can also be a spline-like coupling, that is, a protrusion is provided on the rotating connecting section 401, and a corresponding groove is provided on the rotating connecting groove 304, and the rotation is transmitted through the cooperation of the protrusion and the groove.

[0082] In conjunction with the aforementioned principle, in this embodiment, when the clip 2 is released, the clip 2 and the fixing base 3 need to be disconnected, that is, the connection between the two needs to be broken. Generally, in existing hemostatic clip designs, the clip 2 is connected to the fixing base 3 via a pin 5 or the like. When the clip 2 and the fixing base 3 need to be separated, the fixing base 3 is pulled hard, and the portion of the fixing base 3 connected to the pin 5 is broken, thereby pulling the clip 2 away.

[0083] A preferred embodiment is further proposed, namely, a connecting portion 305 is provided on the fixing seat 3, and the tail of the clip 2 is connected to the connecting portion 305 through a pin 5; a hanging platform 200 is provided at the tail of the clip 2, and a positioning portion 101 is provided on the inner wall of the clamp tube 1, and the positioning portion 101 is used to be clamped with the hanging platform 200.

[0084] Specifically, as attached Figure 12 and attached Figure 13 As shown, the connecting portion 305 is a hook, that is, a hook is provided on the fixing seat 3 , and the pin 5 passes through the through hole on the clip 2 and is hung on the hook to realize the assembly of the clip 2 .

[0085] The release process of clip 2 is shown in the attached figure. Figure 16 and attached Figure 17 As shown, in this embodiment, the clip 2 and the fixing seat 3 can be separated by deformation or breaking of the hook. After separation, the clip 2 is constrained by the clamp tube 1 to maintain the clamping of the diseased tissue, and the fixing seat 3 is separated from the clamp tube 1 together with the connecting shaft 4.

[0086] After being released, the clip 2 is constrained by the clamp tube 1 and remains closed. Due to the lever effect, the tail of the clip 2 tilts upward. In this embodiment, a hanging platform 200 is provided at the tail of the clip 2, and a positioning portion 101 is provided on the inner wall of the clamp tube 1. The positioning portion 101 is a stepped structure or a slot. In this embodiment, the tilting of the tail of the clip 2 is cleverly utilized to allow the hanging platform 200 to engage with the positioning portion 101, thereby securing the opened tail of the clip 2 and preventing the clip 2 from moving axially inward and disengaging from the clamp tube 1.

[0087] Define the end where the clip 2 is located as the distal end (i.e. Figure 1 The other end is the proximal end (i.e. Figure 1 When the positioning portion 101 is a boss, the boss is used to limit the distal movement of the clip 2, so the boss can be attached. Figure 15 The step formed on the clamp tube 1 is shown, and the step is toward the proximal end of the clamp tube 1. When the tail of the clip 2 is tilted up, the step can prevent the clip 2 from moving toward the distal end.

[0088] Also, in order to axially limit the clip 2 during use of the clamping device and prevent the clip 2 (and the fixing seat 3) from being separated from the clamp tube 1, As attached Figure 14 In an embodiment shown in the appendix 15, a baffle is symmetrically provided on one end of the clamp tube 1, and the bent baffle forms a gap with the edge of the clamp tube 1. The clamp 2 can pass through the gap, thereby limiting the clamp 2 (and the fixing seat 3) from falling off from the cavity of the clamp tube 1, and the gap can constitute a rotation space between the clamp tube 1 and the clamp tube 1, and serve as a component for transmitting the force. When the clamp 2 rotates, the rotational motion between the clamp 2 and the clamp tube 1 can be transmitted through the abutment between the clamp 2 and the baffle.

[0089] In a further embodiment, the baffle is further provided with a lug, and the size and position of the lug can adjust the size of the gap for the aforementioned clamp 2 to pass through. Therefore, by selecting a clamp tube 1 with different lug or baffle specifications, the space for relative movement (rotation) between the clamp 2 and the clamp tube 1 can be changed, thereby further changing the restriction on the rotation of the clamp 2.

[0090] To sum up, in order to solve the technical problems of defects in existing clamp instruments, this embodiment provides a clamping instrument, which realizes the effective transmission of axial movement and circumferential rotation between the operating component and the clamp 2 through the combination of the clamp tube 1, the fixing seat 3, the swivel seat 82, the embedded swivel 83 and the connecting shaft 4.

[0091] This combination cleverly utilizes the process of connecting shaft 4 passing through the embedded swivel 83. Once the connecting shaft 4 passes through the embedded swivel 83, a tension-type connection is achieved between the embedded swivel 83 and the clamp tube 1. This allows the elastic hook 830 on the embedded swivel 83 to form a secure and convenient connection with the clamp tube 1. This connection allows for quick and efficient reloading of the clamp assembly with the clip 2 on the clamping device with the rest of the clamping device, reduces the probability of assembly failure, and effectively ensures the stability of the clamp after reloading.

[0092] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without creatively designing them, they shall fall within the scope of protection of the present invention.

Claims

1. A clamping device, characterized in that: It includes an operating component, a connecting component and a clamp component; The operating assembly comprises a handle (70) and an operating portion on the handle (70); the connecting assembly comprises a flexible tube (80) and a core shaft (81); the flexible tube (80) is sleeved on the outside of the core shaft (81); one end of the flexible tube (80) is fixedly connected to the handle (70); and the operating portion is fixedly connected to one end of the core shaft (81); The clamp assembly comprises a clamp tube (1), a clamping piece (2), a fixing seat (3), a swivel seat (82), an embedded swivel (83) and a connecting shaft (4); The clip (2) is fixed on the fixing seat (3), the fixing seat (3) is movably arranged in the clamp tube (1), and the clamp tube (1) is provided with a padlock portion (103); the swivel seat (82) is located on one side of the fixing seat (3), the embedded swivel (83) is movably arranged in the swivel seat (82), and elastic hooks (830) are evenly arranged on the embedded swivel (83) along the circumference, and the elastic hooks (830) are tilted and converged toward the center direction of the embedded swivel (83), and the ends of the elastic hooks (830) face outwards; The connecting shaft (4) is fixedly connected to the other end of the core shaft (81) so that the connecting shaft (4) moves synchronously with the operating part through the core shaft (81), and the connecting shaft (4) passes through the embedded swivel (83) and is detachably connected to the fixing seat (3). At the same time, the connecting shaft (4) abuts against the elastic hook (830) so that the elastic hook (830) expands outward and engages with the inner wall of the clamp tube (1) or the padlock part (103).

2. A clamping device according to claim 1, characterized in that: A restraining member (9) is fixedly provided inside the clamp tube (1), and the restraining member (9) is located on a side of the padlock portion (103) close to the swivel seat (82). The restraining member (9) includes elastic baffles (90), and the elastic baffles (90) are evenly distributed along the circumference, and the ends of the elastic baffles (90) all point to the center of the restraining member (9); When the connecting shaft (4) passes through the embedded swivel (83) and is detachably connected to the fixing seat (3), the elastic hook (830) passes through the restraining member (9), and the elastic blocking piece (90) abuts against the elastic hook (830).

3. A clamping device according to claim 2, characterized in that: The width of the elastic blocking piece (90) gradually decreases from the root to the end.

4. A clamping device according to claim 2, characterized in that: The arrangement density of the elastic blocking pieces (90) is greater than or equal to the arrangement density of the elastic hooks (830).

5. The clamping device according to claim 1, characterized in that: A flexible pad (104) is provided in the clamp tube (1), and when the elastic hook (830) expands outward and has a tendency to abut against the inner wall of the clamp tube (1), the end of the elastic hook (830) is embedded in the flexible pad (104).

6. The clamping device according to claim 1, characterized in that: A through groove (300) is provided on a side of the fixing seat (3) close to the embedded rotating ring (83), and the through groove (300) extends toward a side away from the embedded rotating ring (83), so that a portion of the fixing seat (3) is divided into a first elastic petal (301) and a second elastic petal (302); The first elastic petal (301) is provided with a first groove, the second elastic petal (302) is provided with a second groove, and the first groove and the second groove are correspondingly assembled to form a retreat-stop groove (303); The end of the connecting shaft (4) is provided with a stop-retraction boss (400), and the stop-retraction groove (303) and the stop-retraction boss (400) form a stop-retraction connection.

7. The clamping device according to claim 6, characterized in that: At least two inwardly protruding limiting portions (100) are evenly arranged on the clamp tube (1) along the circumference, and the limiting portions (100) abut against the outer wall of the fixing seat (3).

8. The clamping device according to claim 6, characterized in that: A rotating connection section (401) is provided on the connecting shaft (4) near the stop boss (400); a first matching groove is provided on the first elastic petal (301), and a second matching groove is provided on the second elastic petal (302); the first matching groove and the second matching groove are combined to form a rotating connection groove (304), and the rotating connection groove (304) is coupled with the rotating connection section (401).

9. The clamping device according to claim 1, characterized in that: The fixing seat (3) is provided with a connecting portion (305), and the tail of the clip (2) is connected to the connecting portion (305) via a pin (5); the tail of the clip (2) is provided with a hanging platform (200), and the inner wall of the clamp tube (1) is provided with a positioning portion (101), and the positioning portion (101) is used for clamping with the hanging platform (200).

10. A clamping device according to any one of claims 1 to 9, characterized in that: The operating portion includes a push-pull block (71) and a roller (72), wherein the push-pull block (71) is slidably arranged on the handle (70), and the roller (72) is rotatably arranged on the handle (70), and the core shaft (81) passes through the roller (72) and is fixedly connected to the roller (72), and one end of the core shaft (81) is fixedly connected to the push-pull block (71).

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