Clip applier

Abstract

The utility model discloses a clip applier. The clip applier comprises a tube body assembly, a jaw assembly and a handle assembly, the tube body assembly is provided with a near end and a far end and comprises an inner tube assembly, an outer tube assembly arranged on the outer side of the inner tube assembly in a sleeving mode and a feeding assembly located in the inner tube assembly, and the feeding assembly contains a ligation clip; the jaw assembly is connected to the far end of the tube body assembly; the handle assembly is connected to the near end of the tube body assembly and comprises a feeding handle, and the feeding handle is configured to control the outer tube assembly and at least part of the feeding assembly to move in the axial direction of the tube body assembly so as to control the feeding assembly to convey the ligation clips to the jaw assembly and / or control the jaw assembly to be in a semi-closed state or an open state. The clip applier is simple to operate, easy to control and safer to use.

Description

Technical Field

[0001] Embodiments of the present disclosure are directed to a clip applier. Background Art

[0002] Laparoscopic, endoscopic, and other minimally invasive surgical techniques allow surgeons to perform complex procedures inside the body through tiny incisions. Many surgical procedures require ligating blood vessels during surgery. For example, many surgical procedures require cutting blood vessels (such as veins or arteries), which may need to be ligated to reduce bleeding. In some cases, the surgeon may wish to temporarily ligate a blood vessel to reduce blood flow to the surgical site during surgery. In other cases, the surgeon may wish to permanently ligate a blood vessel.

[0003] Blood vessel ligation can be done by closing the blood vessel with a ligation clip or suturing the blood vessel with sutures. Using sutures to ligate blood vessels requires complex manipulation of the needle and suture material to form the knot required for ligating the blood vessel. This complex operation is very time-consuming and difficult to perform, especially in laparoscopic surgery, where the difficulty of this operation is greatly increased. The operation process of closing the blood vessel with a ligation clip is simpler and more reliable, and the clip applier can be used to control the closing and opening of the ligation clip.

[0004] In traditional technology, the feeding and clamping actions of the clip applier are integrated into one. The user can only complete the operation from the beginning to the clamping of the jaw assembly of the clip applier at one time. Once the jaw assembly starts to clamp, it can only continue to clamp and cannot be opened again. When doctors actually use it, they often need to temporarily fine-tune the clamping position. However, if the jaw assembly of the clip applier has been partially closed, it is difficult to move it. If the position of the clamped blood vessel or tissue needs to be adjusted at this time, an additional ligation clip needs to be clamped, causing inconvenience to the operation. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a clip applier that links the feeding operation with the clamping operation of the jaw assembly through a feeding handle, thereby solving the technical problem that the user cannot adjust the degree of opening of the ligation clip from the beginning of the operation to the closing of the jaw assembly.

[0006] At least one embodiment of the present disclosure provides a clip applier, which includes a tube body assembly, a jaw assembly and a handle assembly; the tube body assembly has a proximal end and a distal end, including an inner tube assembly, an outer tube assembly sleeved on the outside of the inner tube assembly and a feeding assembly located within the inner tube assembly, wherein the feeding assembly accommodates a ligation clip; a jaw assembly connected to the distal end of the tube body assembly; the handle assembly is connected to the proximal end of the tube body assembly, and includes a feeding handle, wherein the feeding handle is configured to control the axial movement of the outer tube assembly and at least a portion of the feeding assembly along the tube body assembly, so as to control the feeding assembly to deliver the ligation clip to the jaw assembly and / or control the jaw assembly to be in a semi-closed state or an open state.

[0007] For example, in the clamp applier provided in at least one embodiment of the present disclosure, the handle assembly also includes a handle base and a first push tube structure disposed in the handle base, the first push tube structure being respectively connected to the outer tube assembly and the feeding handle, and the feeding handle being configured to control the first push tube structure to control the movement of the outer tube assembly and at least part of the feeding assembly.

[0008] For example, in the clip applier provided in at least one embodiment of the present disclosure, the first push tube structure includes a first pushing portion, the feeding assembly includes a pushing structure, the first pushing portion is connected to the pushing structure, and the feeding handle is configured to control the first pushing portion to move along the axial direction to push the pushing structure to apply the ligation clip.

[0009] For example, in the clip applier provided in at least one embodiment of the present disclosure, the feeding assembly also includes a limiting structure, the limiting structure includes a plurality of limiting parts, the plurality of limiting parts elastically abut against a plurality of the ligation clips, and when the pushing structure is pushed by the first pushing part, it moves along the axial direction relative to the limiting structure.

[0010] For example, in the clamp applier provided by at least one embodiment of the present disclosure, the jaw assembly is connected to the distal end of the inner tube assembly, the first push tube structure also includes a second pushing portion, the second pushing portion is connected to the outer tube assembly, and the feeding handle is configured to control the second pushing portion to move along the axial direction to control the outer tube assembly to move relative to the inner tube assembly along the axial direction, so that the outer tube assembly can abut the jaw assembly and control the jaw assembly to be in a semi-closed state or an open state.

[0011] For example, in the clamp applier provided in at least one embodiment of the present disclosure, the second pushing portion is sleeved on the first pushing portion; the jaw assembly includes a first jaw head and a second jaw head arranged opposite to each other, and when the jaw assembly is in a semi-closed state, the first jaw head is close to the second jaw head.

[0012] For example, in the clamp applier provided in at least one embodiment of the present disclosure, the feeding handle includes a first mating portion that cooperates with the first pushing portion and a second mating portion that cooperates with the second pushing portion, and the feeding handle is configured to be controlled to simultaneously control the movement of the first pushing portion and the second pushing portion through the first mating portion and the second mating portion respectively.

[0013] For example, in the clip applier provided in at least one embodiment of the present disclosure, at least one of the first mating portion and the second mating portion is an engaging structure.

[0014] For example, in the clamp applier provided in at least one embodiment of the present disclosure, the handle assembly also includes a first push tube control part and a second push tube control part, wherein the second mating part is engaged with the first push tube control part, the first push tube control part includes a guide trajectory curve, the guide trajectory curve includes a closed curve with a varying radius, the second push tube control part is configured to be limited to the guide trajectory curve and driven by the first push tube structure to move along the guide trajectory curve, the second push tube control part includes a follower block, and the follower block is configured to control the movement of the second push part by abutting against the second push part.

[0015] For example, in the clip applier provided in at least one embodiment of the present disclosure, the closed curve includes a curve portion with a gradually increasing radius and a curve portion with a gradually decreasing radius, so that the follower block can push the second pushing portion to move in the proximal direction or the distal direction respectively.

[0016] For example, in the clamp applier provided in at least one embodiment of the present disclosure, a compression elastic member and a tension elastic member are further provided in the handle base, and two ends of the compression elastic member are respectively connected to the follower block and the handle base to provide thrust to the follower block, and two ends of the tension elastic member are respectively connected to the second pushing portion and the handle base to provide pulling force to the second pushing portion.

[0017] For example, in the clamp applier provided in at least one embodiment of the present disclosure, the handle assembly also includes a clamping handle, which is configured to be connected to the second pushing portion and control the second pushing portion to move along the axial direction, so as to control the outer tube assembly to move relative to the inner tube assembly along the axial direction, so that the outer tube assembly can abut the jaw assembly, thereby controlling the jaw assembly to close or open.

[0018] For example, in the clamp applier provided in at least one embodiment of the present disclosure, the second pushing portion includes a pushing protrusion, the clamping handle includes a clamping control portion cooperating with the pushing protrusion, and the clamping handle is configured to controllably drive the clamping control portion to push the pushing protrusion to control the movement of the second pushing portion along the axial direction.

[0019] Compared with the prior art, the beneficial effect of the present invention lies in that the timing of feeding, half-closing of the jaw assembly, feeding in place, and opening of the jaw assembly are linked and controlled through the linkage structure on the feeding handle. The user does not need to master complex control logic, but only needs to pinch the feeding handle to the bottom, and then use the clamping handle to clamp the ligation clamp. When the feeding is completed, the jaw assembly automatically opens, and the ligation clamp also automatically opens. Before the clamping handle completely closes the ligation clamp, the clamping handle can still move forward and backward freely, so that the opening degree of the ligation clamp can be controlled, and the ligation clamp is always limited at the jaw assembly and will not fall off, and the user can operate it freely in this state. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a clip applier provided in at least one embodiment of the present disclosure;

[0021] Figure 2 An exploded view of a clip applier provided in at least one embodiment of the present disclosure;

[0022] Figure 3 An exploded view of the jaw assembly and adjacent components of a clip applier provided for at least one embodiment of the present disclosure;

[0023] Figure 4 A schematic cross-sectional view of a blade body of a clip applier provided in at least one embodiment of the present disclosure;

[0024] Figure 5 for Figure 3 A top view of the jaw assembly of the clip applier and its adjacent components;

[0025] Figure 6 for Figure 3 A side view of the jaw assembly of the clip applier and its adjacent components;

[0026] Figure 7 A schematic diagram of the three-dimensional structure of a conjoined ligation clip provided in at least one embodiment of the present disclosure;

[0027] Figure 8 A schematic diagram of the internal structure of a handle assembly of a clip applier provided in at least one embodiment of the present disclosure;

[0028] Fig. 9 A partial perspective schematic diagram of a feeding assembly of a clip applier provided in at least one embodiment of the present disclosure;

[0029] Fig.10 A schematic top view of a feed assembly of a clip applier provided in at least one embodiment of the present disclosure;

[0030] Fig.11 Another schematic diagram of the internal structure of the handle assembly of the clip applier provided by at least one embodiment of the present disclosure;

[0031] Fig.12 A schematic diagram of the structure of a feeding handle of a clip applier provided in at least one embodiment of the present disclosure;

[0032] Fig.13 A schematic diagram of a radius variation curve of a first push tube control portion of a clip applier provided in at least one embodiment of the present disclosure;

[0033] Fig.14 A disassembled schematic diagram of a portion of the structure of a handle assembly of a clip applier provided in at least one embodiment of the present disclosure;

[0034] Fig.15 A disassembled schematic diagram of a portion of the structure in a handle assembly of a clip applier provided in at least one embodiment of the present disclosure;

[0035] Fig.16 Another disassembled schematic diagram of a portion of the structure of the handle assembly of the clip applier provided in at least one embodiment of the present disclosure;

[0036] Fig.17 A schematic diagram of a partial structure of a handle assembly of a clip applier provided in at least one embodiment of the present disclosure;

[0037] Fig.18 A schematic diagram of a partial structure of a handle assembly of a clip applier provided in at least one embodiment of the present disclosure; and

[0038] Figure 19-22 A schematic diagram of the process from one feeding to clamping of a clip applier provided in at least one embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0040] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] In embodiments of the present disclosure, the term "proximal" refers to a portion of a component or structure that is close to a clinician, and the term "distal" refers to a portion of a component or structure that is far from a clinician. The term "plurality" refers to two or more. The term "at least one" refers to one or more.

[0042] In the process of closing a blood vessel with a ligation clip, a clip applier (or ligation forceps) is usually used to carry the ligation clip through a puncture device and insert it into a designated position in the body cavity. In use, the ligation clip can be positioned on the blood vessel to be ligated, and the clip applier is controlled in vitro to close the ligation clip.

[0043] However, in the traditional operation mode, only one ligation clip can be picked up and clamped at a time. If multiple ligation clips are needed, the clip applier needs to be removed from the cavity, the ligation clips need to be picked up again outside the cavity, and then inserted into the cavity to clamp the ligation clips again. Clinically, each surgical operation often requires several ligation clips. Repeatedly picking up ligation clips greatly reduces the efficiency of the operation and increases the risk of the operation.

[0044] In some embodiments, a method of firing ligation clips continuously can be used, that is, multiple ligation clips are loaded on a clip applier, so that the operator does not need to withdraw the clip applier from the cavity and can continuously clamp multiple ligation clips.

[0045] However, there are often many problems in the current method of using a clip applier to control the continuous firing of ligation clips. For example, when the ligation clip is not correctly placed in the jaws of the clip applier, it may cause the clip to fall off the jaws or fail to close; multiple ligation clips may be blocked in the track for conveying the ligation clips, causing the ligation clips to fail to close; the deformation of the material of the ligation clip itself may easily cause the ligation clip to be unable to be effectively fixed in the jaw assembly; the handle needs to be operated in a specific order and cannot be operated in reverse, otherwise it will lead to failure to apply the clip; the jaw assembly cannot be bent, resulting in limited surgical operation space.

[0046] In summary, there are several defects in the continuous application of ligation clips, and a better structure is needed to safely and reliably deliver and close the ligation clips in sequence and minimize the damage to the blood vessels.

[0047] At least one embodiment of the present disclosure provides a clip applier, which includes a tube body assembly, a jaw assembly and a handle assembly; the tube body assembly has a proximal end and a distal end, including an inner tube assembly, an outer tube assembly sleeved on the outside of the inner tube assembly and a feeding assembly located in the inner tube assembly, the feeding assembly accommodating a ligation clip; the jaw assembly is connected to the distal end of the tube body assembly; the handle assembly is connected to the proximal end of the tube body assembly, including a feeding handle, the feeding handle is configured to control the axial movement of the outer tube assembly and at least part of the feeding assembly along the tube body assembly, so as to control the feeding assembly to deliver the ligation clip to the jaw assembly and / or control the jaw assembly to be in a semi-closed state or an open state.

[0048] The clamp applier provided by the embodiment of the present disclosure is simple to operate and easy to control, and the feeding handle can be used simultaneously to control the outer tube assembly and at least part of the feeding assembly in the tube body assembly to move along the axial direction of the tube body assembly, so as to control the feeding assembly to apply the ligation clamp to the jaw assembly and / or control the closing and opening of the jaw assembly.

[0049] The following describes the clip applier provided by the present disclosure through several specific examples.

[0050] At least one embodiment of the present disclosure provides a clip applier. Figure 1 1 shows a schematic diagram of the three-dimensional structure of the clip applier, Figure 2 An exploded view of the clip applier is shown. Figure 1 and Figure 2 As shown, the clip applier includes a body assembly 10, a jaw assembly 20, a handle assembly 30, and the like.

[0051] like Figure 1 and Figure 2 As shown, the tube assembly 10 has a proximal end 10A and a distal end 10B, including an inner tube assembly 11 and an outer tube assembly 12 sleeved outside the inner tube assembly 11, and the inner tube assembly 11 and the outer tube assembly 12 can be controlled along the axial direction (i.e. Figure 2 Relative movement in the first direction R1).

[0052] For example, in some embodiments, the tube body assembly 10 further includes a feeding assembly 13 located within the inner tube assembly 11 , and the feeding assembly 13 can accommodate at least one ligation clip A, for example, multiple ligation clips A, to be pushed and used.

[0053] like Figure 1 and Figure 2As shown, the jaw assembly 20 is connected to the distal end 10B of the tube assembly, and includes a first jaw head 21 and a second jaw head 22 connected to the inner tube assembly 11 and arranged opposite to each other. The first jaw head 21 and the second jaw head 22 form the jaw assembly, which can realize the opening and closing of the ligation clip. For example, when the jaw assembly is in a semi-closed state or a closed state, the first jaw head 21 is close to the second jaw head 22, and when the jaw assembly is in an open state, the first jaw head 21 is away from the second jaw head 22. Figure 3 An exploded view of the jaw assembly and its adjacent structures is shown. Figure 3 As shown, the first clamp head 21 and the second clamp head 22 respectively include a tail portion 201 connected to the inner tube assembly 11 , a head portion 202 opposite to the tail portion 201 , and a connecting portion 203 between the tail portion 201 and the head portion 202 .

[0054] It should be noted that in Figure 3 In the figure, the first clamp 21 is used as an example for labeling and illustrating. It can be understood that the second clamp 22 can have the same or similar structure as the first clamp 21. For details, please refer to the description of the first clamp 21, which will not be repeated here. For example, in some embodiments, the first clamp 21 and the second clamp 22 are symmetrical in structure.

[0055] like Figure 1 and Figure 2 As shown, the handle assembly 30 is connected to the proximal end 10A of the tube body assembly, and is configured to control the relative movement of the inner tube assembly 11 and the outer tube assembly 12, so that the outer tube assembly 12 can abut against different parts of the first clamp head 21 and the second clamp head 22 through relative movement to control the closing (for example, half-closing) and opening of the first clamp head 21 and the second clamp head 22, that is, to control the closing and opening of the jaw assembly.

[0056] For example, Figure 1 and Figure 2 As shown, the handle assembly 30 includes a feeding handle 31, which is configured to control at least part of the inner tube assembly 11, the outer tube assembly 12 and the feeding assembly 13 in the tube body assembly 10 along the axial direction ( Figure 2The outer tube assembly 12 and at least part of the feeding assembly 13 can be controlled to move relative to each other in the first direction R1 in the inner tube assembly, for example, to control the outer tube assembly 12 and at least part of the feeding assembly 13 to move axially along the tube assembly, so as to control the feeding assembly 13 to deliver the ligation clamp to the jaw assembly (for example, by controlling the movement of at least part of the feeding assembly 13 relative to the inner tube assembly 11) and / or control the jaw assembly to be in a semi-closed state (for example, it can be close to a closed state to achieve a closed ligation clamp) or an open state (for example, by controlling the relative movement of the inner tube assembly 11 and the outer tube assembly 12). Thus, the feeding handle 31 can simultaneously realize the feeding process and the clamping process of the ligation clamp, realize the linkage of the feeding process and the clamping process, and make the operation simpler. The specific structure of the feeding handle 31 and its control process will be described in detail later.

[0057] For example, Figure 3 As shown, the connecting portion 203 includes a first mating surface 203A that cooperates with the outer tube assembly 12. The first mating surface 203A is configured to abut and slide relatively with the outer tube assembly 12 when the inner tube assembly 11 and the outer tube assembly 12 move relative to each other, so as to achieve the closing and opening of the first clamp 21 and the second clamp 22 by squeezing the first clamp 21 and the second clamp 22 by the outer tube assembly 12.

[0058] For example, in some embodiments, Figure 3 As shown, the jaw assembly 20 may also include a cutting knife 23 rotatably connected to the inner tube assembly 11, the cutting knife 23 includes a second mating surface 23A, and the second mating surface 23A is configured to abut and slide relatively with the outer tube assembly 12 when the inner tube assembly 11 and the outer tube assembly 12 move relative to each other, so as to achieve a cutting action through relative rotation with the inner tube assembly 11.

[0059] For example, Figure 3 As shown, the cutting knife 23 includes a first knife body 24 and a second knife body 25 opposite to each other, and the first knife body 24 and the second knife body 25 are symmetrically connected to the inner tube assembly 11. For example, the first knife body 24 and the second knife body 25 are respectively connected to the inner tube assembly 11 through a rotation shaft 251. For example, the extension direction of the rotation shaft 251 is Figure 3 The second direction R2 in the.

[0060] For example, Figure 4 A schematic cross-sectional view of the first blade body 24 is shown, or Figure 2 The cross section of the second blade body 25 is substantially the same as that of the first blade body 24, which can be referred to as Figure 4 .like Figure 4 As shown, the cross-sections of the first blade body 24 and the second blade body 25 are respectively V-shaped, and the V-shape includes a first linear portion 241 and a second linear portion 242 connected to each other, and the end of the first linear portion 241 away from the second linear portion 242 is formed as a cutting portion, as shown in FIG. Figure 3 As shown by the dotted circle in FIG. 1 , the end of the second linear portion 242 away from the first linear portion 241 (ie Figure 4 The inner tube assembly 11 is hinged to the position indicated by the middle label 244 or the position near it.

[0061] For example, Figure 3 As shown, the second linear portion 242 includes a second mating surface 23A. For example, Figure 5 Shows Figure 3 A schematic top view of the jaw assembly along the second direction R2, as shown in Figure 5 As shown, when the inner tube assembly 11 and the outer tube assembly 12 move relative to each other, the outer tube assembly 12 will abut against the second mating surface 23A and slide along the second mating surface 23A, so that the first knife body 24 and the second knife body 25 can rotate relative to the inner tube assembly 11 around the rotating shaft 251 to achieve a cutting action on the object to be cut in the jaw assembly 20 (for example, the connecting portion between the ligation clips, which will be described in detail later).

[0062] For example, Figure 5 As shown, the distal end of the inner wall of the outer tube assembly 12 may be chamfered, such as Figure 5 As shown by the dotted circle in the figure, it helps to increase the contact area against the surface of the jaw assembly when the outer tube assembly 12 moves relative to the inner tube assembly, avoid generating a large local pressure, and fully squeeze the first clamp head 21 and the second clamp head 22 to close the ligation clip.

[0063] For example, Figure 6 Shows Figure 3 A schematic top view of the jaw assembly along the third direction R3 is shown in FIG. Figure 6 As shown, the connection portion 203 includes a blade avoidance space 26 located inside the connection portion 203, and the first blade 24 and the second blade 25 are located at the blade avoidance space 26. For example, the blade avoidance spaces 26 of the first pliers 21 and the second pliers 22 are grooves whose contours are similar to those of the first blade 24 and the second blade 25 but whose sizes are slightly larger than those of the first blade 24 and the second blade 25. Thus, the first blade 24 and the second blade 25 have sufficient rotation space and can fully act on the object to be cut (e.g., the connecting piece between the ligation clips) located between the first pliers 21 and the second pliers 22 to achieve a sufficient cutting effect.

[0064] For example, Figure 3 and Figure 4 As shown, the first blade body 24 and the second blade body 25 further include a blade body stopper 243, respectively. The blade body stopper 243 is connected to the end of the second linear portion 242 of the first blade body 24 and the second blade body 25 away from the first linear portion 241, and in the cross section, as shown in FIG. Figure 4As shown, the blade limiting portion 243 and the second linear portion 242 form an obtuse angle a.

[0065] For example, the blade limit portion 243 is located between the inner tube assembly 11 and the outer tube assembly 12. When the first blade body 24 and the second blade body 25 are in an open state (non-cutting state), the blade limit portion 243 can be against the inner tube assembly 11. When the first blade body 24 and the second blade body 25 are in a closed state (cutting state), the blade limit portion 243 can gradually turn to the outer tube assembly 12, for example, contacting the inner wall of the outer tube assembly 12, thereby limiting the rotation range of the first blade body 24 and the second blade body 25, so as to make the control of the first blade body 24 and the second blade body 25 safer.

[0066] For example, Figure 4 As shown, an acute angle b is formed between the first linear portion 241 and the second linear portion 242, so that the cutting portions of the first blade body 24 and the second blade body 25 can be fully turned to the object to be cut in the jaw assembly by a small range of rotation of the first blade body 24 and the second blade body 25 to achieve cutting.

[0067] For example, in some embodiments, Figure 3 As shown, the axial direction of the tube body assembly 10 is along the first direction R1, the rotation axis 251 of the first blade body 24 and the second blade body 25 is along the second direction R2, the first clamp head 21 and the second clamp head 22 are rotatably connected to the inner tube assembly 11, for example, rotatably connected to the inner tube assembly 11 through a pin 27, the rotation axis of the first clamp head 21 and the second clamp head 22 is a third direction R3, the first direction R1 is perpendicular to the second direction R2, and perpendicular to the third direction R3, and the second direction R2 is perpendicular to the third direction R3.

[0068] For example, in some embodiments, Figure 3 and Figure 6 As shown, the outer tube assembly 12 includes a push knife structure 28 opposite to the second mating surface 23A, and the push knife structure 28 is configured to abut against the second mating surface 23A when the inner tube assembly 11 and the outer tube assembly 12 move relative to each other, so as to drive the cutting knife 23 to rotate and realize the cutting action of the conjoined ligation clamp.

[0069] For example, the pusher structure 28 includes a protrusion disposed on the inner wall of the outer tube assembly 12. The protrusion matches the second mating surface 23A and can control the cutting action of the cutting blade 23. For example, the protrusion can be a block structure fixed to the inner wall of the outer tube assembly 12, such as a pusher block or a pin formed by welding or assembly; or, the protrusion can also be a structure formed by stamping or other means and integrated with the outer tube assembly 12. In this case, the outer wall (appearance) of the outer tube assembly 12 has a concave structure, such as Figure 3 and Figure 6 shown.

[0070] For example, Figure 7 A one-piece ligation clip is shown, such as Figure 7 As shown, the conjoined ligation clamp includes a plurality of ligation clamps A, each ligation clamp A includes a first beam A1, a second beam A2, and an elastic connection portion A3 connecting the first beam A1 and the second beam A2, and the elastic connection portion A3 is configured to allow the first beam A1 and the second beam A2 to have an open state ( Figure 7 Each ligation clip A has a hollow portion A31 at the elastic connection portion A3, and the hollow portion A31 is in the form of a crescent or a strip, so that the elastic connection portion A3 can be elastically deformed accordingly when the elastic connection portion A3 is in the open state and the closed state.

[0071] For example, each ligation clip A can be closed on a blood vessel or tissue in a controllable manner to achieve hemostasis and sealing effects.

[0072] For example, Figure 7 As shown, every two adjacent ligation clips A are connected by a connector B, and the connection method of the two adjacent ligation clips A is basically the same. For example, the connector B can be made of a flexible material, such as silicone rubber, thermoplastic elastomer (TPE) or cotton thread, or the connector B can also be made of a hard material, such as plastic.

[0073] For example, Figure 7 As shown, the first beam A1 includes a first boss A4, which can be used to limit the position in the clip applicator. When the ligation clip is pushed to the jaw assembly of the clip applicator, the first boss A4 can also be used to position in the jaws. The second beam A2 includes a second boss A5, which can be used to limit the hook portion of the first beam A1 (shown by the dotted circle in the figure) at the gap of the second boss A5 when the ligation clip is closed, so as to make the closure more stable; in addition, when the ligation clip is pushed to the jaw assembly of the clip applicator, the second boss A5 is used to limit the position in the clip applicator and can also be used to position in the jaw assembly of the clip applicator.

[0074] For example, the above-mentioned conjoined ligation clip can be accommodated in the feeding assembly 13 of the clip applier, and each ligation clip can be pushed into the jaw assembly in a controlled manner and used. For example, the cutting knife 23 of the clip applier is used to cut the connecting piece B between two adjacent ligation clips A, so that each ligation clip A can be used separately, and in the clip applier, multiple ligation clips are connected by the connecting piece B, so that the spacing between adjacent ligation clips A is controllable and can be moved at the same time without causing undesirable phenomena such as blockage, so that the pushing and use of the ligation clips are more orderly and safe.

[0075] The specific structure of the handle assembly 30 and its control process will be described in detail below.

[0076] For example, Figure 8The internal structure of the handle assembly is shown in FIG. Figure 8 As shown, the handle assembly 30 further includes a handle base 30A and a first push tube structure 33 disposed in the handle base 30A, the first push tube structure 33 is connected to the tube body assembly 10 and the feeding handle 31 respectively, and the feeding handle 31 is configured to control the first push tube structure 33 to control the movement of the outer tube assembly 12 and at least part of the feeding assembly 13 in the tube body assembly 10. In this way, the feeding process and the clamping process of the ligation clip can be realized simultaneously, and the feeding process and the clamping process are linked, which makes the operation simpler.

[0077] For example, Figure 8 As shown, the first push tube structure 33 includes a first pushing portion 331, which may also be referred to as a feeding pushing portion, for controlling the feeding operation. Fig. 9 A partial three-dimensional schematic diagram of the feeding assembly is shown. Fig.10 Shows Fig. 9 A top view of the feeding assembly in FIG. Fig. 9 and Fig.10 As shown, the feeding assembly 13 includes a pushing structure 131, a first pushing portion 331 is connected to the pushing structure 131, and the feeding handle 31 is configured to control the movement of the first pushing portion 331 along the axial direction to push the pushing structure 131 to apply the ligation clip. Thus, the first pushing tube structure 33 can control the pushing structure 131 through the first pushing portion 331.

[0078] For example, Fig. 9 and Fig.10 As shown, the pushing structure 131 is in the form of a sheet, for example, a spring sheet, and includes a plurality of pushing branches 131A, and the plurality of pushing branches 131A are respectively inclined inward (that is, inclined toward the space accommodating the ligation clip), so that the plurality of pushing branches 131A can be used to push a plurality of ligation clips A respectively. Fig. 9 and Fig.10 In the example, the plurality of pushing branches 131A are arranged in two rows, one above the other, to act on the first protrusions A4 and the second protrusions A5 of the plurality of ligation clips A respectively, so as to push the plurality of ligation clips A simultaneously on the upper and lower sides, thereby ensuring that the plurality of ligation clips A are subjected to uniform force, thereby ensuring the pushing shape of the plurality of ligation clips A.

[0079] For example, Fig. 9 and Fig.10 As shown, the feeding assembly 13 further includes a limiting structure 132. For example, the limiting structure 132 is in the form of a sheet as a whole, such as a spring sheet. The limiting structure 132 includes a plurality of limiting portions 132A. The plurality of limiting portions 132A elastically abut against the plurality of ligating clips A. The structure of the plurality of limiting portions 132A is, for example, substantially the same as the structure of the plurality of pushing branches 131A, but is slightly misaligned relative to the plurality of pushing branches 131A, such as Fig.10As shown, the plurality of limiting portions 132A are respectively further forward relative to the corresponding pushing branches 131A, that is, closer to the distal end, so that the plurality of limiting portions 132A can be respectively used to limit the plurality of ligating clips A pushed to the limiting portions 132A by the pushing branches 131A.

[0080] For example, the limiting structure 132 is a fixed structure and will not be moved, and the pushing structure 131 is a controlled movable structure. When the pushing structure 131 is pushed by the first pushing portion 331 , the pushing structure 131 moves in the axial direction relative to the limiting structure 132 .

[0081] For example, the push structure 131 has an initial position and a push position. Fig. 9 and Fig.10 As shown, in the process of the pushing structure 131 being pushed, the pushing structure 131 starts from the initial position and moves relative to the limiting structure 132, pushing the branch 131A to abut against the rear ends of the first protrusion A4 and the second protrusion A5 (the right side in the figure), so as to push the multiple ligation clamps A to the distal end of the tube body assembly 20, and the ligation clamps A respectively squeeze the limiting portions 132A to cause the limiting portions 132A to undergo elastic deformation. When the multiple ligation clamps A are pushed by a pitch (for example, the length occupied by a ligation clamp and a connector B), the ligation clamps A reach the limiting portion 132A in front of them and are limited by the limiting portion 132A in front of them. At this time, the limiting portion 132A rebounds so that the ligation clamps A cannot retreat. At this time, the pushing structure 131 reaches the pushing position, thereby realizing a feeding operation. Afterwards, the pushing structure 131 can be controlled to retreat to the initial position. Due to the limiting effect of the limiting portion 132A, the ligation clamp A will not move any more, and the ligation clamp A is pushed one pitch.

[0082] For example, the ligation clamp A loaded in the feeding assembly 13 is in a semi-closed state. In some cases, due to being in the semi-closed state for a long time, the ligation clamp A may not be able to return to the fully open state through its own elasticity. In the above-mentioned feeding process, through the thrust transmitted by the pushing structure 131, when the ligation clamp is pushed to the jaw assembly, since the first boss A4 and the second boss A5 of the ligation clamp A are limited, the thrust transmitted by the pushing structure 131 can promote the opening of the ligation clamp, so that the ligation clamp A can be opened smoothly, thereby preventing the ligation clamp from falling off when the jaw assembly 20 is opened, thereby increasing the safety of the ligation clamp A.

[0083] For example, the jaw assembly 20 is connected to the inner tube assembly 11, Fig.11 Another schematic diagram showing the internal structure of the handle assembly is shown in FIG. Fig.11 As shown, the first push tube structure 33 also includes a second pushing portion 332, also referred to as an outer tube pushing portion, for controlling the movement of the outer tube assembly 12 relative to the inner tube assembly 11, thereby achieving the opening and closing (e.g., half-closing) of the jaw assembly and the control of the cutting knife.

[0084] For example, the second push portion 332 is connected to the outer tube assembly 12, and the feeding handle 31 is configured to control the second push portion 332 to move in the axial direction to control the relative movement of the outer tube assembly 12 relative to the inner tube assembly 11 in the axial direction, so that the outer tube assembly 12 can abut against the jaw assembly and control the jaw assembly to be in a semi-closed state or an open state. Thus, the first push tube structure 33 realizes the control of the state of the jaw assembly through the second push portion 332.

[0085] For example, the second pushing portion 332 is sleeved on the first pushing portion 331, for example, the second pushing portion 332 is sleeved on the outer side of the first pushing portion 331. Fig.11 Relative to Fig.10 For example, the second pushing portion 332 is sleeved on the outer side of the first pushing portion 331 .

[0086] For example, Figure 8 As shown, the feeding handle 31 includes a first matching portion 333 matched with the first pushing portion 331 and a second matching portion 334 matched with the second pushing portion 332. The feeding handle 31 is configured to be controlled to simultaneously control the first matching portion 333 and the second matching portion 334, so as to respectively control the movement of the first pushing portion 331 and the second pushing portion 332, thereby simultaneously controlling the feeding operation and the opening and closing operation of the jaw assembly. In this way, the feeding operation and the opening and closing operation of the jaw assembly can be linked, the correlation between feeding and clamping can be automatically controlled, and the operation is simple and reliable.

[0087] For example, at least one of the first matching portion 333 and the second matching portion 334 is a meshing structure, thereby achieving precise matching, and the structure is simpler and easier to assemble.

[0088] For example, in some examples, the first mating portion 333 and the second mating portion 334 are both meshing structures, and the first mating portion 333 and the second mating portion 334 can be disposed on the same component. Fig.12 The structure diagram of the feeding handle 31 is shown as follows: Fig.12 As shown, the first matching portion 333 and the second matching portion 334 are continuously arranged meshing structures, such as toothed meshing structures; or in other words, the first matching portion 333 and the second matching portion 334 are different parts of the toothed meshing structure of the feeding handle 31 .

[0089] For example, in other embodiments, the first matching portion 333 and the second matching portion 334 may also be independent components or other matching components other than the meshing structure.

[0090] For example, Figure 8As shown, in this embodiment, the first pushing portion 331 has an engagement structure, such as a toothed engagement structure, that engages with the first matching portion 333 so as to be driven by the feeding handle 31. Figure 8 and Fig.11 As shown, the handle assembly also includes a first push tube control part 335 and a second push tube control part 336. The first push tube control part 335 has an engaging structure, such as a gear, that engages with the second matching part 334. The second matching part 334 engages with the gear of the first push tube control part 335 so that the second push tube control part 336 can be driven by the feeding handle 31.

[0091] For example, the first push tube control part 335 includes a guide track curve, which is a curve with a changing radius, such as a closed curve with a changing radius. The second push tube control part 336 is configured to be limited to the guide track curve and can be driven by the first push tube control part 335 to move along the guide track curve. The second push tube control part 336 includes a follower block 337, which is configured to control the movement of the second push part 332 by abutting against the second push part 332. The guide track curve can make the jaw assembly present a trend of gradually opening or gradually closing at different pushing degrees (described in detail later).

[0092] For example, the outer contour of the first push tube control portion 335 is a curve with a changing radius (refer to the subsequent Figure 19-22 ), and the follower block 337 cooperates with the outer contour of the first push tube control part 335 to move along with the outer contour.

[0093] For example, Fig.11 As shown, the second pushing portion 332 includes a protrusion 332A, and the follower block 337 can act on the protrusion 332A to push the second pushing portion 332 .

[0094] Therefore, when the feeding handle 31 is rotated, the first pushing portion 331 can be pushed to move forward through the engagement with the first matching portion 333, and the pushing structure 131 can be driven to move forward to realize feeding; at the same time, through the combination of the first push tube control portion 335 and the second push tube control portion 336, the second pushing portion 332 can be pushed to move, so as to realize the movement of the outer tube 13 relative to the inner tube assembly 12 and realize the control of the jaw assembly.

[0095] For example, in some examples, the first push tube control part 335 can be in the form of a cam, etc. The outer contour of the cam is a closed curve with a changing radius relative to the rotation center of the cam, and the outer contour is in contact with the follower block 337. When the cam rotates, the distance between the contact point between the cam and the follower block 337 changes due to the change in the cam radius, so that the follower block 337 moves forward and backward. When the cam rotates in the direction of increasing radius, the follower block 337 is pushed backward (to the right in the figure), and at this time, due to the pullback force of the tensile elastic member 340 (to be described later), the second push part 332 also moves backward, and the jaw assembly shows a tendency to gradually open; when the cam rotates in the direction of decreasing radius, the follower block 337 is pushed forward (to the left in the figure), and because the push force of the compression elastic member 338 is greater than the pullback force of the tensile elastic member 340, the second push part 332 moves forward, and the jaw assembly shows a tendency to gradually close.

[0096] For example, Fig.13 Schematic diagram of the radius change curve of the first push tube control part is shown, wherein the abscissa represents the rotation angle of the first push tube control part 335, and the ordinate represents the radius change of the guide trajectory curve, such as Fig.13 As shown, the guide trajectory curve includes a curve portion with a gradually increasing radius and a curve portion with a gradually decreasing radius, so that the follower block 337 can push the second pushing portion 332 to move forward or backward respectively. For example, in a clamping process of the feeding handle 31 (i.e., pressing the feeding handle 31 once in the same direction), the follower block 337 can move forward first to push the second pushing portion 332 to control the outer tube assembly 12 to move toward the distal end to semi-close the ligation clamp, and then the follower block 337 moves backward, and the second pushing portion 332 and the outer tube assembly 12 retreat to open the ligation clamp.

[0097] For example, in some embodiments, Fig.11 As shown, the handle base 30A includes a compression elastic member 338 , and both ends of the compression elastic member 338 are respectively connected to the follower block 337 and the handle base 30A to provide thrust to the follower block 337 to maintain the stability and operability of the follower block 337 .

[0098] For example, Fig.11 As shown, the handle base 30A further includes a tensile elastic member 340 , both ends of which are respectively connected to the second pushing portion 332 and the handle base 30A to provide a pulling force to the second pushing portion 332 to maintain the stability and operability of the second pushing portion 332 .

[0099] For example, in some embodiments, Figure 1 and Figure 2As shown, the handle assembly 30 further includes a clamping handle 32, which is configured to be connected to the second pusher 332 and control the second pusher 332 to move in the axial direction, so as to control the outer tube assembly 12 to move in the axial direction relative to the inner tube assembly 11, so that the outer tube assembly 12 can abut against the jaw assembly and control the jaw assembly to close or open. The clamping handle 32 can realize a one-time closing of the jaw assembly, which is simple and quick to operate.

[0100] For example, Fig.14 A disassembled schematic diagram of a portion of the handle assembly 30 is shown. Fig.14 As shown, the second pushing portion 332 includes a pushing protrusion 339, such as a pushing pin, and the clamping handle 32 includes a clamping control portion 321 that cooperates with the pushing protrusion 339. The clamping handle 32 is configured to control the clamping control portion 321 to push the pushing protrusion 339 to control the movement of the second pushing portion 332 in the axial direction, thereby controlling the relative movement of the outer tube assembly 12 relative to the inner tube assembly 11 in the axial direction, so that the outer tube assembly 12 can abut against the jaw assembly and control the jaw assembly to close. Thus, the control of the jaw assembly is achieved through the cooperation of the pushing protrusion 339 and the clamping control portion 321.

[0101] For example, the thrust provided by the compression elastic member 338 is greater than the tension provided by the tension elastic member 340. Thus, the follower block 337 can fully abut against the protrusion 332A of the second push portion 332 and be controlled by the first push tube control portion 335, which is beneficial to the stability and operability of the structure.

[0102] For example, in some embodiments, the clip applier may also have a bending function and a rotating function, which will be described in detail below.

[0103] For example, Figure 3 As shown, the inner tube assembly 11 includes a first part 111 and a second part 112 arranged along an axial direction (a first direction R1 in the figure), and the first part 111 and the second part 112 are rotationally connected, for example, hinged, and are configured to be controllably rotatable relative to each other along a first rotation axis Y1. The extension direction of the first rotation axis Y1 is different from the axial direction. For example, the first rotation axis is along a second direction R2 in the figure, perpendicular to the first direction R1.

[0104] like Figure 1-Figure 3 As shown, the jaw assembly 20 is connected to the distal end 10B of the tube assembly 10 , and the first portion 111 is closer to the distal end 10B than the second portion 112 , that is, closer to the jaw assembly 20 . At this time, the jaw assembly 20 is connected to the first portion 111 .

[0105] like Figure 1 and Figure 2As shown, the handle assembly 30 is connected to the proximal end 10A of the tube assembly 10, and includes a bending knob 50, which is configured to control the relative rotation of the first portion 111 and the second portion 112. For example, the bending knob 50 can control the first portion 111 and the second portion 112 to bend in a plane perpendicular to the second direction R2.

[0106] For example, the inner tube assembly 11 further includes a third portion 113, the first portion 111, the second portion 112 and the third portion 113 are sequentially arranged in the axial direction, for example, sequentially arranged in the direction from the distal end to the proximal end, the second portion 112 and the third portion 113 are rotatably connected, for example, hinged, and configured to be controllably rotatable relative to each other along the second rotation axis Y2, the second rotation axis Y2 being parallel to the first rotation axis. Thus, the bending range of the inner tube assembly 10 can be increased.

[0107] For example, through the above arrangement, the tube body assembly can at least achieve left-right bending of -30° to +30°. In some examples, it can achieve left-right bending of -40° to +40°, left-right bending of -50° to +50° or a larger angle range.

[0108] For example, the first part 111 of the inner tube assembly 11 includes a distal assembly connected to the jaw assembly, and has various structures for connecting to the jaw assembly and the cutting knife. The second part 112 is a bending structure, and the third part 113 is a straight inner tube. The straight inner tube can accommodate the feeding assembly 13, etc. to accommodate the ligation clamp, which will be described in detail later.

[0109] For example, Figure 3 As shown, the outer tube assembly 13 includes a first portion 121, a second portion 122 and a third portion 123, which are arranged in sequence along the axial direction, for example, in sequence from the distal end to the proximal end, and correspond to the positions of the first portion 111, the second portion 112 and the third portion 113 of the inner tube assembly 11, respectively, so as to achieve corresponding bending operations. The first portion 121 and the second portion 122 are rotatably connected, for example, hinged, and the second portion 122 and the third portion 123 are rotatably connected, for example, hinged.

[0110] For example, the first part 121 of the outer tube assembly 13 can be used as an outer tube push tube, which is mainly used to push the jaw assembly and the cutting knife 23 at the distal end to realize the opening and closing of the jaw assembly and the cutting operation of the cutting knife 23; the second part 122 can be used as an outer tube hinge to realize bending operations; the third part 113 is an outer tube straight tube, which is longer in the axial direction and serves as the main connecting tube body between the jaw assembly and the handle assembly 30.

[0111] For example, in some embodiments, Figure 2As shown, the handle assembly 30 also includes at least one bending rod 14 connected between the first part 111 and the bending knob 50, and the bending knob 50 is configured to control the displacement of the at least one bending rod 14 along the axial direction to control the rotation operation between the first part 111 and the second part 112, for example, also controls the rotation operation between the second part 112 and the third part 113.

[0112] For example, in some examples, such as Figure 2 As shown, at least one bending rod 14 includes a first bending rod 141 and a second bending rod 142, and the first bending rod 141 and the second bending rod respectively include opposite first ends 14A and second ends 14B, and the first ends 14A of the first bending rod 141 and the second bending rod 142 are respectively connected to opposite sides of the first part 111, for example, hinged to opposite sides of the first part 111. For example, the opposite sides of the first part 111 have hinge holes 111A, so as to be hinged to the first bending rod 141 and the second bending rod 142 through pins. For example, the second ends 14B of the first bending rod 141 and the second bending rod 142 are respectively connected to different positions of the bending knob 50, and the bending knob 50 is configured to control the relative movement of the first bending rod 141 and the second bending rod 142 along the axial direction by rotation, so as to control the rotation operation of the first part 111 and the second part 112, and the rotation operation between the second part 112 and the third part 113.

[0113] For example, in some examples, the first ends 14A of the first bending rod 141 and the second bending rod 142 can be respectively connected to the opposite sides of the inner side of the first part 111, in which case the first bending rod 141 and the second bending rod 142 are located inside the inner tube assembly 11; in other examples, the first ends 14A of the first bending rod 141 and the second bending rod 142 can be respectively connected to the opposite sides of the outer side of the first part 111, in which case the first bending rod 141 and the second bending rod 142 are located between the inner tube assembly 11 and the outer tube assembly 12.

[0114] For example, when the bending knob 50 controls the relative movement of the first bending rod 141 and the second bending rod 142 to be larger, the first part 111 and the second part 112 rotate relatively, and the second part 112 and the third part 113 also rotate relatively, thereby achieving a larger bending angle; when the bending knob 50 controls the relative movement of the first bending rod 141 and the second bending rod 142 to be smaller, the first part 111 and the second part 112 rotate relatively, and the second part 112 and the third part 113 may rotate relatively, or may not rotate, and at this time, a smaller bending angle can be achieved.

[0115] For example, Fig.15The disassembled schematic diagram of the part of the structure in the handle assembly 30 and the part of the structure of the bending knob 50 are shown. Fig.15 As shown, the bending knob 50 includes a rod control portion 143 and a bending operation portion C, and the bending operation portion C can be rotated to control the rotation state of the rod control portion 143. The rod control portion 143 is, for example, in the form of a disc. The rod control portion 143 includes a first sliding guide track 143A and a second sliding guide track 143B, and the first bending rod 141 and the second bending rod 142 are respectively connected to the first sliding guide track 143A and the second sliding guide track 143B. The bending knob 50 is configured to control the sliding of the first bending rod 141 and the second bending rod 142 on the first sliding guide track 143A and the second sliding guide track 143B by rotation to control the relative movement of the first bending rod 141 and the second bending rod 142 along the axial direction.

[0116] For example, in some embodiments, Fig.15 As shown, the first bending rod 141 and the second bending rod 142 are respectively connected to the first sliding guide track 143A and the second sliding guide track 143B through the first slide 144 and the second slide 145, and the bending knob 50 is configured to control the sliding of the first slide 144 and the second slide 145 on the first sliding guide track 143A and the second sliding guide track 143B by rotation to control the relative movement of the first bending rod 141 and the second bending rod 142 along the axial direction.

[0117] For example, the first slide 144 and the second slide 145 are connected to the bending rod and the sliding guide track at opposite ends, for example, Fig.15 In the example, the overall extension direction of the first slide 144 and the second slide 145 is perpendicular to the extension direction of the first bending rod 141 and the second bending rod 142, the upper ends of the first slide 144 and the second slide 145 are fixedly connected to the first bending rod 141 and the second bending rod 142 respectively, and the lower ends of the first slide 144 and the second slide 145 are slidably connected to the first sliding guide track 143A and the second sliding guide track 143B respectively.

[0118] For example, the first sliding guide track 143A and the second sliding guide track 143B are in the form of sliding grooves. In this case, the lower ends of the first sliding seat 144 and the second sliding seat 145 are sliding protrusions that cooperate with the sliding grooves, respectively.

[0119] For example, in some embodiments, Fig.15As shown, the first sliding guide track 143A and the second sliding guide track 143B are in an arc shape with a varying radius. The arc shape of the first sliding guide track 143A and the second sliding guide track 143B are substantially the same, but are arranged at relative positions. For example, the arc shape of the first sliding guide track 143A and the second sliding guide track 143B gradually increases in radius in a clockwise or counterclockwise direction. Thus, when the turning knob 50 is rotated, the relative movement of the first turning rod 141 and the second turning rod 142 can be made smooth and uniform, and the relative movement is greater within a limited space, so as to achieve a wide range of turning.

[0120] For example, in some embodiments, Fig.16 As shown, the handle assembly 30 may also include a first motion guide plate 146 and a second motion guide plate 147, the first motion guide plate 146 and the second motion guide plate 147 respectively include limiting tracks extending along the axial direction, the first slide 144 and the second slide 145 are respectively connected to the pull rod control part 143 through the first motion guide plate 146 and the second motion guide plate 147 to limit the movement of the first slide 144 and the second slide 145 along the axial direction.

[0121] For example, Fig.16 As shown, the limiting track of the first motion guide plate 146 includes a first guide hole 146A extending in the axial direction, the first motion guide plate 146 also includes a first fixing portion 146B, the first slide 144 passes through the first guide hole 146A and is connected to the first sliding guide track 143A of the control part, the limiting track of the second motion guide plate 147 includes a second guide hole 147A extending in the axial direction, the second motion guide plate 147 also includes a second fixing portion 147B, the second slide 145 passes through the second guide hole 147A and is connected to the second sliding guide track 143B of the pull rod control part 143, the first fixing portion 146B is slidably connected to the second sliding guide track 143B, and the second fixing portion 147B is slidably connected to the first sliding guide track 143A. Thus, the first slide 144 and the second slide 145 are limited to move in the axial direction to avoid sliding deviation, and each motion guide plate is simultaneously arranged on two sliding guide tracks, which has higher stability.

[0122] For example, in some embodiments, Figure 1 As shown, the handle assembly 30 includes a handle base 30A and a rotating head 40 rotatably connected to the handle base 30A, at least a portion of the rotating head 40 is sleeved on the pipe body assembly 10, and is configured to be able to controllably drive the pipe body assembly 10 and the jaw assembly 20 to rotate relative to the handle base 30A along a third rotation axis Y3 parallel to the axial direction of the pipe body assembly 10. The third rotation axis Y3 is parallel to the first direction R1.

[0123] That is, the rotating head 40 is used to control the pliers body including the tube assembly 10 and the jaw assembly 20 to rotate along the axial direction without any angle restriction. When the entire pliers body rotates, all parts including the tube assembly 10 and the jaw assembly 20 rotate together, and when the jaw assembly 20 rotates to any angle, the jaw assembly 20 can be operated to bend without being restricted by the rotational motion.

[0124] For example, in some embodiments, Figure 1 and Figure 2 As shown, the turning knob 50 is disposed on the rotating head 40. For example, at least a portion of the rotating head 40 is sleeved on the outside of the outer tube assembly 12 and is fixedly connected to the tube body assembly 10. Fig.16 and Fig.17 As shown, the proximal ends of the bending pull rod 14 and the outer tube assembly 12 have holes O1 and O2 respectively, and the rotating head 40 can be fixedly connected to the inner tube assembly 11 by means of a pin 15 passing through the holes O1 and O2 respectively, thereby keeping the proximal and distal ends of the inner tube assembly 11 always fixed.

[0125] For example, hole O1 and hole O2 have an axial extension trajectory for cooperating with the pin 15, so that the bending rod 14 and the outer tube assembly 12 can move axially along the axial trajectory defined by the hole O1 and the hole O2. Thus, the bending rod 14 can be bent by relative movement with the inner tube assembly 11, and the outer tube assembly 12 can control the jaw assembly and the cutting knife by relative movement with the inner tube assembly 11. At the same time, the length of hole O1 and hole O2 limits the movement range of the bending rod 14 and the outer tube assembly 12.

[0126] For example, Fig.16 As shown, the tube assembly 10 is rotatably connected to the first push tube structure 33, for example, the third rotating portion 331A rotatably connected to the first push tube structure 33, so that the tube assembly 10 and the jaw assembly 20 can rotate relative to the handle base 30A. Fig.17 As shown, the tube body assembly 10 is also rotatably connected to the second pushing portion 332, for example, through the first rotating portion 35 rotatably connected to the second rotating portion 332B of the second pushing portion 332, so that the tube body assembly 10 and the jaw assembly 20 can rotate as a whole relative to the handle base 30A.

[0127] For example, Fig.18 As shown, the handle assembly 30 also includes a connecting block 34, the distal end of the connecting block 34 is connected to the outer tube assembly 12, and the proximal end of the connecting block 34 is connected to the first rotating part 35. Figure 8For example, the first rotating part 35 is fixedly connected to the first rotating part 35 through the pin 35A, and is connected to the outer tube assembly 12 through the outer tube slot 34A. Therefore, when the first rotating part 35 and the second rotating part 332B of the second pushing part 332 rotate, the tube body assembly 10 and the jaw assembly 20 can be driven to rotate simultaneously.

[0128] For example, Figure 8 As shown, the first rotating portion 35 is also at least partially arranged on the outside of the third rotating portion 331A of the first push tube structure 33, and can rotate relative to the third rotating portion 331A of the first push tube structure 33, thereby helping the tube body assembly 10 and the jaw assembly 20 to rotate as a whole relative to the handle base 30A.

[0129] For example, Figure 19-22 A schematic diagram of the process from one feeding to clamping of a clip applier provided by at least one embodiment of the present disclosure is shown.

[0130] For example, Fig.19 As shown, the clamp applier is in an initial state, and various structures such as the feeding handle 31 and the clamping handle 32 are all in an initial state. At this time, the combined ligation clamp is accommodated in the feeding assembly 13, and each ligation clamp accommodated in the feeding assembly 13 is in a semi-closed state. There is no ligation clamp in the jaw assembly, and the jaw assembly is fully open (i.e., open position).

[0131] For example, Fig. 20 As shown, when the feeding handle 31 is pulled to the first position, for example, it is pulled counterclockwise to the position shown in the figure, the feeding handle 31 drives the first pushing part 331 and the second pushing part 332 at the same time, and the feeding assembly 13 starts feeding. The first push tube control part 335 (for example, a cam) rotates in the direction of decreasing radius, and the follower block 337 is pushed forward (left side in the figure), so that the second pushing part 332 moves forward, and the jaw assembly shows a tendency to gradually close, and finally presents a semi-closed state (that is, when the jaw closure reaches half of the closing stroke). At this time, the ligation clamp is also in a semi-closed state, which is the state when the ligation clamp is accommodated in the feeding assembly 13. Therefore, the state of the jaw assembly adapts to the shape of the ligation clamp, so as to stably fix the ligation clamp to the jaw assembly to prevent the ligation clamp from falling off.

[0132] For example, Fig.21As shown, the feeding handle 31 is continued to be moved to the second position, for example, counterclockwise to the position shown in the figure, the feeding handle 31 simultaneously drives the first pushing portion 331 and the second pushing portion 332, the feeding assembly 13 feeds the material into place, that is, into the jaw assembly, the first push tube control portion 335 (for example, a cam) rotates in the direction of increasing the radius, and the follower block 337 is pushed backward (to the right in the figure), so that the second pushing portion 332 moves backward, the jaw assembly shows a tendency to gradually open, and finally presents an open state (that is, an open position), and accordingly, the ligation clamp is also in an open state.

[0133] For example, Fig. 22 As shown, since the ligation clamp has been pushed to the jaw assembly, and the jaw assembly is in an open state, the ligation clamp is in a ready-to-use state. At this time, the ligation clamp can be operated, placed on the blood vessel or tissue to be clamped, and the clamping handle 32 is turned, so that the clamping control part 321 pushes the pushing protrusion 339 to control the second pushing part 332 to move forward, so that the outer tube assembly 12 can abut the jaw assembly and control the jaw assembly to close; at the same time, the cutting knife 23 is driven to cut the connecting piece between adjacent ligation clamps to disconnect the adjacent ligation clamps. In this way, the linkage of the cutting action and the clamping action is achieved, that is, one action can achieve the cutting action and the clamping action at the same time, without multiple operations.

[0134] This achieves one-time feeding to clamping operations.

[0135] Afterwards, the feeding handle 31 can be manually returned to the initial position, and the clamping handle 32 can be returned to the initial position by relying on the pulling force of the stretch elastic member 340 to wait for the next operation.

[0136] In summary, in the embodiments of the present disclosure, when the ligation clamp is pushed to the jaw assembly, the ligation clamp is in a semi-closed state, and the jaw assembly is also in a semi-closed state accordingly to adapt to the shape of the ligation clamp so as to fix it to the jaw assembly. After the ligation clamp is delivered to the position, the jaw assembly drives the ligation clamp to open, and when necessary, the clamping handle is used to close it. The actions of feeding, semi-closing of the jaw assembly, feeding in place, and opening of the jaw assembly have strict logic and timing control. In traditional technology, this series of actions are solidified into one, and the user can only complete it once from starting the operation to clamping the jaw assembly. Once the jaw assembly starts to clamp, it can only continue to clamp, and the jaw assembly cannot be opened again. When the doctor actually uses it, it is often necessary to temporarily fine-tune the clamping position, but if the jaw assembly has been partially closed, it is difficult to move again, which is relatively passive. The technical solution provided by the embodiment of the present disclosure can perfectly solve this problem. Through the linkage structure on the feeding handle, the timing of the occurrence of this series of actions is linked and controlled. The user does not need to master the complex control logic, but only needs to pinch the feeding handle to the bottom and then use the clamping handle to clamp the ligation clamp.

[0137] In addition, the embodiment of the present disclosure links the feeding operation with the clamping operation through the feeding handle, and utilizes the design of the first push tube control unit, so that when the feeding is completed, the jaw assembly automatically opens, and the ligation clamp also automatically opens. At this time, before the clamping handle completely closes the ligation clamp, the clamping handle can still move forward and backward freely, so that the opening degree of the ligation clamp can be controlled, and the ligation clamp is always limited at the jaw assembly and will not fall off, and the user can operate it freely in this state.

[0138] On the other hand, the hair clip applier generally requires the ligation clip to be loaded into the clip applier at the manufacturer's place. Whether it is a traditional single ligation clip or a conjoined ligation clip used in the embodiment of the present disclosure, it is in a compressed state in the clip applier, that is, a semi-closed state. Limited by the industry standards for laparoscopic surgery, surgical instruments cannot exceed several specific diameters such as 5mm, 8mm or 10mm, and the pipe diameter of the clip applier cannot be expanded at will, resulting in the ligation clip being in a compressed state from the completion of assembly to the use, that is, a semi-closed state. Since the ligation clips are mostly made of high molecular polymer materials, they have the characteristics of aging creep and will lose elasticity over a period of months to years. When the doctor uses the clip applier, the loaded ligation clip is almost solidified in a semi-closed state and cannot be restored to a fully open state through its own elasticity. At this time, the ligation clip can only be opened with the help of the clip applier. The conventional clip applier uses the movement of the jaw assembly to push the ligation clip open, but this method is less reliable and often fails, resulting in the ligation clip being unable to be opened, or even the jaw assembly being opened but the ligation clip not being opened, causing the ligation clip to be detached and fall into the patient's body. The clip applier provided by the disclosed embodiment does not generate the risk of the ligation clip falling, and opens the ligation clip in a semi-closed state through the thrust transmitted by the first push tube structure, that is, the first push tube structure transmits the thrust to the frontmost (distal) ligation clip through the feeding assembly and the conjoined ligation clip, so that the ligation clip is gradually opened, and the operation is more stable and reliable.

[0139] In addition, in the embodiment of the present disclosure, during the pushing and clamping process, the tail end of the ligation clamp is always connected and restricted by the rear ligation clamp, which also avoids the ligation clamp falling off from the jaw assembly and causing surgical safety risks.

[0140] On the other hand, the embodiments of the present disclosure can jointly promote the one-piece ligation clamp, combining multiple parts into one, and utilizing the connection characteristics of the one-piece ligation clamp itself to increase the bending and rotation functions of the clamp applier. There is no need to set a transmission structure or a positioning structure for the ligation clamp at the bending position, which cannot be achieved by a single-body ligation clamp. In addition, it can also help the operator bend the jaw assembly to enter some narrow gaps and bends to apply the ligation clamp, thereby increasing the freedom of movement of the instrument, greatly improving the doctor's operating convenience, and saving operation time.

[0141] There are a few points to note:

[0142] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures may refer to the general design.

[0143] (2) For the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the thickness of layers or regions is enlarged or reduced, that is, these drawings are not drawn according to the actual scale.

[0144] (3) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0145] The above are only specific implementations of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and the protection scope of the present disclosure shall be based on the protection scope of the claims.

Claims

1. A clip applier, characterized in that: include: The tube body assembly has a proximal end and a distal end, and comprises an inner tube assembly, an outer tube assembly sleeved outside the inner tube assembly, and a feeding assembly located inside the inner tube assembly, wherein the feeding assembly accommodates a ligation clip; a jaw assembly connected to the distal end of the tube assembly; and A handle assembly is connected to the proximal end of the tube assembly and includes a feeding handle. Wherein, the feeding handle is configured to control the axial movement of the outer tube assembly and at least part of the feeding assembly along the tube body assembly, so as to control the feeding assembly to deliver the ligation clip to the jaw assembly and / or control the jaw assembly to be in a semi-closed state or an open state.

2. The clip applier according to claim 1, wherein: The handle assembly further comprises a handle base and a first push tube structure disposed in the handle base, wherein the first push tube structure is connected to the outer tube assembly and the feeding handle respectively. The feeding handle is configured to control the first push tube structure to control the movement of the outer tube assembly and at least a portion of the feeding assembly.

3. The clip applier according to claim 2, characterized in that The first push tube structure includes a first push portion, and the feeding assembly includes a push structure. The first pushing portion is connected to the pushing structure, and the feeding handle is configured to control the first pushing portion to move along the axial direction to push the pushing structure to apply the ligation clip.

4. The clip applier according to claim 3, wherein: The feeding assembly further comprises a limiting structure, wherein the limiting structure comprises a plurality of limiting parts, and the plurality of limiting parts elastically abut against the plurality of ligation clips. When the pushing structure is pushed by the first pushing portion, it moves along the axial direction relative to the limiting structure.

5. The clip applier according to claim 3, wherein: The jaw assembly is connected to the distal end of the inner tube assembly, and the first push tube structure further includes a second push portion, which is connected to the outer tube assembly. The feeding handle is configured to control the second pushing portion to move along the axial direction to control the outer tube assembly to move relative to the inner tube assembly along the axial direction so that the outer tube assembly can abut against the jaw assembly and control the jaw assembly to be in a semi-closed state or an open state.

6. The clip applier according to claim 5, characterized in that The second pushing portion is sleeved on the first pushing portion; The jaw assembly comprises a first jaw head and a second jaw head which are arranged opposite to each other. When the jaw assembly is in a semi-closed state, the first jaw head is close to the second jaw head.

7. The clip applier according to claim 5 or 6, characterized in that: The feeding handle includes a first matching portion matching with the first pushing portion and a second matching portion matching with the second pushing portion. The feeding handle is configured to be controlled to simultaneously control the movement of the first pushing portion and the second pushing portion through the first matching portion and the second matching portion respectively.

8. The clip applier according to claim 7, wherein: At least one of the first matching portion and the second matching portion is an engaging structure.

9. The clip applier according to claim 7, wherein: The handle assembly also includes a first push tube control portion and a second push tube control portion. wherein the second mating portion is engaged with the first push tube control portion, the first push tube control portion comprises a guide trajectory curve, and the guide trajectory curve comprises a closed curve with a varying radius, The second push tube control unit is configured to be limited to the guide track curve and driven by the first push tube structure to move along the guide track curve. The second push tube control portion includes a follower block, and the follower block is configured to control the movement of the second push portion by abutting against the second push portion.

10. The clip applier of claim 9, wherein: The closed curve includes a curve portion with a gradually increasing radius and a curve portion with a gradually decreasing radius, so that the follower block can push the second pushing portion to move in the proximal direction or the distal direction respectively.

11. The clip applier of claim 9, wherein: A compression elastic member and a tension elastic member are also provided in the handle base, and two ends of the compression elastic member are respectively connected to the follower block and the handle base to provide thrust to the follower block, and two ends of the tension elastic member are respectively connected to the second pushing portion and the handle base to provide pulling force to the second pushing portion.

12. The clip applier of claim 5, wherein: The handle assembly also includes a clamping handle, The clamping handle is configured to be connected to the second pushing portion and control the second pushing portion to move along the axial direction, so as to control the outer tube assembly to move relative to the inner tube assembly along the axial direction, so that the outer tube assembly can abut against the jaw assembly, thereby controlling the jaw assembly to close or open.

13. The clip applier of claim 12, wherein: The second pushing portion includes a pushing protrusion, and the clamping handle includes a clamping control portion that cooperates with the pushing protrusion. The clamping handle is configured to controllably drive the clamping control portion to push the pushing protrusion, so as to control the movement of the second pushing portion along the axial direction.

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