Jaw assembly and clip applicator

Abstract

The present invention relates to a jaw assembly and an applicator forceps, belonging to medical surgical devices. The jaw assembly includes a clamping mechanism, the clamping mechanism includes a first clamp and a second clamp which are oppositely arranged, and the first clamp and the second clamp move between an open position and a closed position to form a clip for a ligating clip located within the clamping mechanism. A symmetry axis is formed between the first clamp and the second clamp. The jaw assembly further includes a moving member that can move relative to the clamping mechanism along the direction of the symmetry axis, and a guiding and closing mechanism formed between the moving member and the clamping mechanism. The guiding and closing mechanism includes a guiding post formed on one of the moving member and the clamping mechanism and a guiding groove formed on the other of the moving member and the clamping mechanism. The guiding post moves within the guiding groove to form a first position corresponding to the open position and a second position corresponding to the closed position. The guiding post moves between the first position and the second position to cause the first clamp and the second clamp to move between the open position and the closed position.

Description

Technical Field

[0001] The present invention relates to a jaw assembly and a clip applicator, belonging to medical surgical devices. Background Art

[0002] During a surgical operation, in order to fully expose the surgical field, it is necessary to ligate the blood vessels around the target tissue to stop bleeding. Hemostasis technology has become one of the core basic operation technologies in surgery. Surgical operations in any part of the human body almost invariably involve bleeding and hemostasis, and generally a clip applicator is used to close the ligating clip for hemostasis. When the existing clip applicator is in use, since the closing of the clamp is achieved by the outer sleeve squeezing the side of the clamp, and the outer sleeve is located at the end of the clamp, it will cause the ligating clip to cross, twist and deform when closed. Summary of the Invention

[0003] The purpose of the present invention is to provide a jaw assembly that can make the firing stable and improve the clip forming effect.

[0004] To achieve the above purpose, the present invention provides the following technical solution: a jaw assembly, including a clamp mechanism, the clamp mechanism includes a first clamp and a second clamp arranged oppositely, the first clamp and the second clamp move between an open position and a closed position to form a ligating clip within the clamp mechanism, a symmetry axis is formed between the first clamp and the second clamp, the jaw assembly further includes a moving member that can move relative to the clamp mechanism along the direction of the symmetry axis, and a guiding and closing mechanism formed between the moving member and the clamp mechanism, the guiding and closing mechanism includes a guiding post formed on one of the moving member and the clamp mechanism and a guiding groove formed on the other of the moving member and the clamp mechanism, the guiding post moves in the guiding groove to form a first position corresponding to the open position and a second position corresponding to the closed position, and the guiding post moves between the first position and the second position to cause the first clamp and the second clamp to move between the open position and the closed position.

[0005] Further, the opening direction of the guiding groove is perpendicular to the opening direction of the jaw assembly.

[0006] Further, the extending direction of the guiding groove is substantially the same as the clip discharging direction of the ligating clip

[0007] Further, the guiding groove includes an obliquely extending portion that causes the first clamp and the second clamp to move between the open position and the closed position, the obliquely extending portion has a first end and a second end arranged oppositely, the first end is far from the front end of the clamp mechanism; the obliquely extending portion gradually offsets outward along the opening direction of the clamp mechanism from the first end towards the second end.

[0008] Further, the guiding groove further includes an avoidance groove that bends and extends outward from the first end in the opening direction of the clamping mechanism.

[0009] Further, the guiding groove further includes a stabilizing groove formed along the longitudinal direction of the clamping mechanism from the second end, and the stabilizing groove is parallel to the symmetry axis.

[0010] Further, the guiding groove is formed on the first clamp and / or the second clamp, and the guiding post is formed on the moving member.

[0011] Further, an anti - detachment structure is formed between the guiding post and the clamping mechanism to limit the detachment of the anti - detachment part and the clamping mechanism in the thickness direction.

[0012] Further, the anti - detachment structure includes a hook portion formed on the guiding post or a convex portion protruding outward from the guiding post, and a hooking surface formed on the clamping mechanism to cooperate with the hook portion or a groove formed on the side wall of the guiding groove to cooperate with the convex portion. The convex portion is an arc - shaped or square - shaped or special - shaped structure; alternatively, the anti - detachment structure includes an obliquely arranged rod wall of the guiding post and an inclined surface formed in the guiding groove.

[0013] Further, the clamping mechanism further includes a second elastic arm of the first elastic arm and a connecting portion connecting the first elastic arm and the second elastic arm. The first elastic arm connects the connecting portion and the first clamp, and the second elastic arm connects the connecting portion and the second clamp.

[0014] The present invention also provides an applicator clip, including a working head, a handle mounted on the working head for gripping, and a rod body device assembled on the working head. The rod body device includes an outer sleeve tube assembled with the working head, a rod body assembly disposed inside the outer sleeve tube, and the above - mentioned jaw assembly assembled on the outer sleeve tube and the rod body assembly.

[0015] The beneficial effects of the present invention are as follows: By providing a moving member in the jaw assembly of the present invention and arranging a guiding closing mechanism between the moving member and the clamping structure, the first clamp and the second clamp move between the open position and the closed position through the cooperation between the guiding groove and the guiding post of the guiding closing mechanism, so that the applicator clip can be stably fired and the clamping effect of the ligating clip can be improved.

[0016] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following describes in detail with reference to the preferred embodiments of the present invention and the accompanying drawings. Brief Description of the Drawings

[0017] Figure 1Schematic diagram of the jaw assembly and the rod body device shown in an embodiment of the present invention;

[0018] Figure 2 is Figure 1 exploded view of the rod body device in

[0019] Figure 3 is Figure 1 enlarged view of the circle A in , the clamping mechanism is in the open position;

[0020] Figure 4 schematic diagram when the clamping mechanism is in the closed position;

[0021] Figure 5 schematic diagram of the structure of the clamping mechanism;

[0022] Figure 6 partial schematic diagram of the structure of the clamping mechanism in another direction;

[0023] Figure 7 is Figure 3 partial schematic diagram of the structure of the moving part in

[0024] Figure 8 is Figure 3 partial schematic diagram of the structure of the moving part in another direction in

[0025] Figure 9 schematic diagram of the working head and the handle of the electric clip applicator shown in an embodiment of the present invention;

[0026] Figure 10 is Figure 9 schematic diagram of the structure of the working head in

[0027] Figure 11 is Figure 10 cross-sectional schematic diagram of

[0028] Figure 12 schematic diagram of the structure of the second clamping mechanism that can be used in the anti-disengagement structure of the present invention;

[0029] Figure 13 is Figure 12 lateral schematic diagram of the moving part cooperating with

[0030] Figure 14 cross-sectional schematic diagram of the third clamping mechanism that can be used in the anti-disengagement structure of the present invention;

[0031] Figure 15 is Figure 14 lateral schematic diagram of the moving part cooperating with Detailed implementation manners

[0032] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] The clip applicator is used to fix the ligating clip on the blood vessel to block the blood flow in the blood vessel. The closing of the ligating clip (i.e., forming a clip) is achieved by the jaw assembly of the clip applicator. The clip applicator can be a manual clip applicator or an electric clip applicator. In an embodiment of the present invention, the electric clip applicator is taken as an example for description. The electric clip applicator includes a jaw assembly for setting the ligating clip, and the jaw assembly is used to achieve the forming of the ligating clip. Please refer to Figure 3 and Figure 4 and in combination with Figure 1 , the jaw assembly 4 shown in an embodiment of the present invention includes a clamping mechanism 41, a moving member 42 that can move relative to the clamping mechanism 41, and a guiding and closing mechanism formed between the clamping mechanism 41 and the moving member 42. The ligating clip 10 is arranged in the clamping mechanism 41. The clamping mechanism 41 has two position states, namely an open position ( Figure 3 shown) and a closed position ( Figure 4As shown, the movement of the clamping mechanism 41 from the open position to the closed position can cause the ligating clip 10 within the clamping mechanism 41 to be closed into a clip. The clamping mechanism 41 is moved from the open position to the closed position through a guiding and closing mechanism. In an actual clip-applying forceps structure, the clamping mechanism 41 can be assembled on an outer sleeve, or on a clamping assembly, or on a rod assembly.

[0037] Please refer to Figure 5 , the clamping mechanism 41 includes a first clamp 411 and a second clamp 412 which are oppositely arranged. The first clamp 411 and the second clamp 412 move between the open position and the closed position to form a clip with the ligating clip 10 located within the clamping mechanism 41. A symmetry axis X is formed between the first clamp 411 and the second clamp 412. The structures of the first clamp 411 and the second clamp 412 are the same and are mirror-symmetrically arranged. Hereinafter, the first clamp 411 will be taken as an example for detailed description. The first clamp 411 includes a clamping portion 4111 and an extension portion 4112 extending forward from the clamping portion 4111. The end of the clamping portion 4111 far from the extension portion 4112 is named as the end (not labeled) of the first clamp 411. The end of the extension portion 4112 far from the clamping portion 4111 is named as the front end 4113, and this front end 4113 is the front end 4113 of the clamping mechanism 41. A clamping groove 4114 for clamping the ligating clip 10 is formed on the inner end surface (not labeled) of the clamping portion 4111. The clamping groove 4114 extends from the end of the clamping portion 4111 to the extension portion 4112 and is close to the front end 4113 of the extension portion 4112, but does not penetrate the front end 4113 of the extension portion 4112.

[0038] The first clamp 411 and the second clamp 412 can be connected through a hinge structure (this method is a conventional existing design and will not be described in detail herein), or they can be of an integral structure. In this embodiment, the first clamp 411 and the second clamp 412 are of an integral structure. Specifically, please refer to Figure 5 , the clamping mechanism 41 further includes a first elastic arm 413 and a second elastic arm 414 which are oppositely arranged, and a connecting portion 415 connecting the first elastic arm 413 and the second elastic arm 414. The first elastic arm 413 connects the connecting portion 415 and the first clamp 411, and the second elastic arm 414 connects the connecting portion 415 and the second clamp 412. The first elastic arm 413 and the second elastic arm 414 are arranged in parallel in a normal state, and there is an activity gap between them. They can move relative to each other under the action of an external force, and move in opposite directions under the action of their elastic forces after the external force is withdrawn, and return to a relatively parallel state.

[0039] The first elastic arm 413 and the second elastic arm 414 have the same structure and are arranged in a mirror image. Here, the structure of the elastic arm will be described first taking the first elastic arm 413 as an example. The first elastic arm 413 is in a straight and long strip shape. The thickness of the first elastic arm 413 is less than the thickness of the first clamp 411 it is connected to. The first elastic arm 413 has a first connection portion 4131 for docking with the first clamp 411. The width of the first connection portion 4131 gradually widens from the first elastic arm 413 to the first clamp 411. The first connection portion 4131 has an arc surface 4132 facing outward. It should be noted that the arc surface 4132 of the first elastic arm 413 and the arc surface (not labeled) of the second elastic arm 414 are arranged in opposite directions. By setting the first connection portion 4131, stress can be reduced and the striking force can be decreased. In this embodiment, in order to further reduce the striking force, a material removal design (i.e., forming a material removal groove) can also be carried out on the connection portion 415. Specifically, the connection portion 415 has a flat portion for connecting with the rod assembly and a second connection portion 4151 formed on the flat portion. The first elastic arm 413 and the second elastic arm 414 are both connected to the second connection portion 4151. A material removal groove 4152 is formed between the first connection portion 4131 and the first elastic arm 413 and the second elastic arm 414 respectively.

[0040] Please refer to Figure 3 and Figure 4 , the moving part 42 moves along the direction of the symmetry axis X. In this embodiment, the moving part 42 is installed on the rod assembly and is driven by the rod assembly to move relative to the clamping mechanism 41 along the symmetry axis X. The moving part 42 is an arc-shaped sheet body. Of course, in other embodiments, the moving part 42 can also be arranged on the outer sleeve and be driven by the outer sleeve to move relative to the clamping mechanism 41 along the direction of the symmetry axis X. Or, in other embodiments, the moving part 42 can be set as a fixed part and the clamping mechanism 41 can be movable relative to the moving part 42 along the direction of the symmetry axis X. The guiding and closing mechanism includes a guiding column 43 formed on one of the moving part 42 and the clamping mechanism 41 and a guiding groove 44 formed on the other of the moving part 42 and the clamping mechanism 41. The guiding column 43 moves in the guiding groove 44 to form a first position corresponding to the open position and a second position corresponding to the closed position. The guiding column 43 moves between the first position and the second position to cause the first clamp 411 and the second clamp 412 to move between the open position and the closed position.

[0041] In this embodiment, the guide post 43 is formed on the moving member 42, and the moving member 42 and the guide post 43 are integrally formed. The guide groove 44 is provided on the clamping mechanism 41. Specifically, in this embodiment, there are two guide grooves 44, which are respectively formed on the first clamp 411 and the second clamp 412, and the opening direction of the guide groove 44 is perpendicular to the opening direction of the jaw assembly 4. In this embodiment, the guide groove 44 is formed on the upper end surfaces of the first clamp 411 and the second clamp 412, and the opening direction of the guide groove 44 is perpendicular to the common plane of the first clamp 411 and the second clamp 412. It should be noted that in other embodiments, the guide groove 44 can also be formed on the outer side surfaces of the first clamp 411 and the first clamp 411. Alternatively, the guide groove 44 can also be provided on the moving member 42, and the corresponding guide post 43 is provided on the clamping mechanism 41. However, this setting will increase the volume of the guide post 43, thereby increasing the volume of the entire clamping mechanism 41, which is not conducive to the miniaturization of the clamping pliers. In addition, the guide groove 44 can be provided only on one of the first clamp 411 and the second clamp 412. However, if set in this way, the other clamp without the guide groove will be fixed. Compared with this embodiment, a larger striking force will be required, and the clamp provided with the guide groove 44 is more likely to be fatigued and damaged.

[0042] Please refer to again Figure 5 and in combination with Figure 4, the extending direction of each guiding groove 44 is substantially the same as the clip - discharging direction of the ligating clip 10 (the clip - discharging direction of the ligating clip 10 is the same as the axial direction of the clamping mechanism 41). The guiding groove 44 includes an obliquely extending portion 441 that causes the first clamping jaw 411 and the second clamping jaw 412 to move between the open position and the closed position. The obliquely extending portion 441 has a first end 4411 and a second end 4412 that are oppositely arranged, and the first end 4411 is far from the front end 4113 of the clamping mechanism 41. The obliquely extending portion 441 of the first clamping jaw 411 gradually offsets outward from the first end 4411 towards the second end 4412 along the opening direction (a1 direction) of the first clamping jaw 411. Correspondingly, the obliquely extending portion of the second clamping jaw gradually offsets outward from its first end towards its second end along the opening direction (a2 direction) of the second clamping jaw. In this embodiment, the guiding groove 44 has an L - shaped structure. Specifically, the guiding groove 44 of the first clamping jaw 411 further includes an avoidance groove 442 that bends and extends outward from its first end 4411 towards the opening direction (a1 direction) of the first clamping jaw 411. Correspondingly, the avoidance groove 422 of the second clamping jaw is formed by bending and extending outward from its first end towards the opening direction (a2 direction) of the second clamping jaw. The avoidance groove 442 is perpendicular to the symmetry axis X, and the extension lines of the two avoidance grooves 442 coincide. By providing the avoidance groove 442, the overall volume of the jaw assembly 4 can be made smaller. Specifically, during the operation, when the jaw assembly 4 enters the human body through a trocar (not shown), at this time, the clamping mechanism 41 is in the open position, and the guiding post 43 is located at the first end 4411. If the diameter of the trocar is smaller than that of the first clamping jaw 411 and the second clamping jaw 412 in the normal state (i.e., the normal open state), the trocar interferes with the first clamping jaw 411 and the second clamping jaw 412. After an external force acts on the first clamping jaw 411 and the second clamping jaw 412, the first clamping jaw 411 and the second clamping jaw 412 move relatively. At this time, the guiding post 43 moves into the avoidance groove 442. When the jaw assembly 4 passes through the trocar, the force exerted by the trocar on the first clamping jaw 411 and the second clamping jaw 412 is withdrawn, and the first clamping jaw 411 and the second clamping jaw 412 move in opposite directions again under the elastic force of the first elastic arm 413 and the second elastic arm 414, and return to their original state positions, and the guiding post 43 moves to the first end 4411. It should be noted that when the guiding post 43 moves into the avoidance groove 442, since the avoidance groove 442 is perpendicular to the symmetry axis X, when the guiding post 43 is located in the avoidance groove 442, axial - direction locking can also be achieved to prevent misoperation.

[0043] The guiding groove 44 further includes a stabilizing groove 443 formed along the longitudinal direction of the clamping mechanism 41 from the second end 4412. The stabilizing groove 443 is parallel to the symmetry axis X. Through this stabilizing groove 443, the clip - forming effect can be further ensured.

[0044] In this embodiment, the guiding groove 44 is specifically arranged on the clamping portion 4111. In order to further improve the clamping effect, the clamping groove 4114 needs to be as close as possible to the front end 4113 of the clamping groove 4114, that is, the clamping groove 4114 needs to be as close as possible to the extending portion 4112.

[0045] Please refer to Figure 7 and Figure 8 and, in combination with Figure 6 , in this embodiment, in order to prevent the guiding column 43 from separating from the guiding groove 44, an anti-separation structure is formed between the guiding column 43 and the clamping mechanism 41 to limit the separation of the guiding column 43 and the clamping mechanism 41 in the thickness direction. Specifically: The anti-separation mechanism includes a hook portion 432 formed on the guiding column 43 and a hooking surface 4116 formed on the clamping mechanism 41 to cooperate with the hook portion 432. The moving member 42 and the hook portion 432 are oppositely arranged on both sides of the clamping mechanism 41. In detail, a moving groove 4115 is recessed in the bottom surface of the first clamp 411, the guiding groove 44 is located above the moving groove 4115, the hooking surface 4116 is the upper surface of the moving groove 4115, and the hook portion 432 is buckled on the hooking surface 4116 of the moving groove 4115. Correspondingly, a moving groove 4115 and a hooking surface 4116 are also recessed in the bottom surface of the second clamp 412, and the hook portion 432 cooperating with the second clamp 412 is buckled on the hooking surface 4116 of the second clamp 412. The cooperation between the hook portion 432 and the hooking surface 4116 is used to prevent the guiding column 43 from separating from the guiding groove 44. In addition, by providing the moving groove 4115 and setting the upper surface of the moving groove 4115 as the hooking surface 4116, the overall thickness of the jaw assembly can be reduced. In this embodiment, the hook portion 432, the guiding column 43, and the moving member 42 are integrally injection-molded. Of course, in other embodiments, the hook portion 432 can be fixed or installed on the guiding column 43 by means of pasting, connecting members, etc. It should be noted that in this embodiment, since the guiding column 43 and the hook portion 432 are integrally formed, in order to facilitate the assembly of the guiding column 43, the width and length of the hook portion 432 are not greater than the width and length of the avoiding groove 442, so that the guiding column 43 can be installed into the guiding groove 44 through the avoiding groove. In addition, the hook portion 432 can also be other structures, such as circular, square structures, etc. In addition, please refer to Figure 12 and Figure 13 , the anti-separation structure can also include a convex portion 432' protruding outward from the guiding column 43' and a groove 4116' formed on the side wall (not labeled) of the guiding groove 44' to cooperate with the convex portion 432', and the convex portion 432' is an arc-shaped or square or special-shaped structure. Or, the anti-separation structure includes an obliquely arranged rod wall of the guiding column and an inclined surface formed in the guiding groove, as shown in Figure 14 and Figure 15, the guide post 43” is set as a slash, that is, the guide post 43” is not perpendicular to the moving part 42”. Correspondingly, an inclined surface 4116” that interferes with the guide post 43” is formed in the guide groove 44”. The inclined surface 4116” and the inclined rod wall (not labeled) of the guide post 43” form an anti - detachment structure. Or, the guide post is directly set as a dovetail block, and the guide groove is set as a dovetail groove. The dovetail block and the dovetail groove form an anti - detachment structure.

[0046] Please refer to Figure 9 and Figure 4 , the electric clamping forceps generally include a working head 2, a handle 1 installed on the working head 2 for holding, and a rod body device 3 assembled on the working head 2. The jaw assembly 4 is arranged on the rod body device 3. In this embodiment, the handle 1, the working head 2 and the rod body device 3 are detachably connected, so that when any one of them is damaged, it can be directly replaced without replacing the whole surgical instrument to save medical costs and reduce the economic pressure on patients. The working head 2 and the handle 1, the working head 2 and the rod body device 3 can be detachably connected by means of clamping, screw - thread matching, plug - in, etc. In this embodiment, the working head 2 and the handle 1 are connected by clamping, and the working head 2 and the rod body device 3 are connected by plug - in.

[0047] Please refer to Figures 9 to 11 , the working head 2 includes a housing 21, a driving rod 23 arranged in the housing 21, a first communication component and a rotating head 22 installed on the housing 21. An opening 211 for connecting the first communication component (not shown) to the outside is formed on the housing 21. The opening 211 is located in the rotating head 22, and a first guide member 222 is formed in the rotating head 22.

[0048] The handle 1 is an electric handle 1, which includes a handle housing 13 with a receiving cavity, a motor 14 arranged in the receiving cavity, a control circuit electrically connected to the motor 14, a first switch 11 and a second switch 12 arranged on the handle housing 13 and coupled to the control circuit. The working head 2 is also provided with a transmission mechanism 25 for converting the radial force of the motor 14 into an axial force. The driving rod 23 is connected to the transmission mechanism 25. Among them, the first switch 11 is used to drive the driving rod 23 to move forward, and the second switch 12 is used to drive the driving rod 23 to move backward. It should be noted that the driving component, the control circuit, the first switch 11 and the second switch 12 can also be arranged in the working part, depending on the actual situation, and no specific limitation is made here.

[0049] Please refer to Figure 1 and Figure 4, the rod body device 3 includes a docking part 32 connected to the working head 2, an outer sleeve 31 fixed to the docking part 32, a rod body assembly disposed within the docking part 32 and the outer sleeve 31, and a clip bin assembly disposed on the rod body assembly. In this embodiment, the outer sleeve 31 is fixed to the docking part 32. After the docking part 32 is fixed to the working head 2, the outer sleeve 31 will not move relative to the working head 2 in the axial direction. A plurality of ligation clips (not labeled) are provided in the clip bin assembly, and the clips are ejected through the rod body assembly. Please refer to Figure 1 , Figure 2 and Figure 10 , the docking part 32 includes a docking housing 321 for insertion into the rotating head 22 and a second communication component 322 disposed at the front end of the docking housing 321 for plugging into the first communication component. A second guiding member 323 is formed on the docking housing 321 to cooperate with the first guiding member 222 to adjust the docking position of the second communication component 321 and the first communication component. When the rod body device 3 is inserted into the rotating head 22, the first guiding member 222 and the second guiding member 323 cooperate with each other to dock the first communication component and the second communication component 322, and the driving rod 23 is connected to the rod body assembly.

[0050] In this embodiment, there is a problem that the first communication component and the second communication component 322 are not easily docked. Among them, the second communication component 322 includes a communication housing 3221 installed on the docking housing 321 and electrical terminals 3222 disposed within the communication housing 3221. The communication housing 3221 forms a rectangular opening 3225 for exposing the electrical terminals 3222. The first communication component includes a docking interface for plugging into the rectangular opening 3225, and the docking interface and the rectangular opening 3225 need to be completely aligned during docking. Therefore, the design of the first guiding member 222 and the second guiding member 323 is particularly important to achieve a quick, convenient and efficient effect. Please refer to Figure 11 , specifically, the first guiding member 222 includes at least two spaced-apart first bosses 2221, and the second guiding member 323 includes at least a second boss 3231 that engages between at least two first bosses 2221. The first bosses 2221 and the second boss 3231 are in an arrow-shaped structure. When preparing for docking, the arrows of the first bosses 2221 and the second boss 3231 are arranged opposite to each other; after docking, the arrows of the first bosses 2221 and the second boss 3231 are misaligned and arranged away from each other.

[0051] The communication housing 3221 has a cylindrical structure. An annular protrusion 3224 protrudes from the outer cylindrical surface of the communication housing 3221. A first groove 3211 that mates with the protrusion 3224 is provided on the docking housing 321. The second communication component 321 can rotate relative to the docking housing 321. Correspondingly, the docking housing 321 also has a cylindrical structure. A second groove 3212 is provided on the docking housing 321, and a sphere 221 that engages with the second groove 3212 is provided on the rotating head 22. The process of inserting the rod body device 3 into the rotating head 22 is as follows: Rotate the communication housing 3221 to rotate it relative to the docking housing 321 to adjust the position of the second communication component 322, so that when the position of the second communication component 322 corresponds to that of the first communication component, the interval position between the second boss 3231 and the two first bosses 2221 is roughly corresponding. When the rod body device 3 is inserted into the rotating head 22, finely adjust the position of the rod body device 3 so that the second boss 3231 cooperates with the first boss 2221 until the rectangular opening 3225 is completely docked with the docking port. At this time, the second groove 3212 engages with the sphere 221. After the rod body device 3 is inserted into the rotating head 22, when the angle of the rod body device 3 is adjusted by rotating the rotating head 22, since the second communication component 322 remains stationary when docked with the first communication component, the docking housing 321 rotates relative to the second communication component 322 to complete the angle adjustment of the rod body device 3.

[0052] Please refer to Figure 2 , and in combination with Figure 3 and Figure 6, the rod assembly includes a closing push cylinder 341 disposed within the docking housing 321, a clip ejection push cylinder 342 disposed within the closing push cylinder 341, a fixed sleeve 343 sleeved between the closing push cylinder 341 and the docking housing 321, and a closing rod 33 and a clip pushing rod 35 disposed within the outer sleeve 31. A first spring 361 is disposed within the clip ejection push cylinder 342. The clip ejection push cylinder 342 passes through the communication housing 3221 and abuts against the driving rod within the working head 2, so as to push the clip ejection push cylinder 342 to move in the clip ejection direction through the transmission assembly within the working head 2. A first spring 361 is disposed within the clip ejection push cylinder 342, and an inner stepped portion (not shown) is disposed within the clip ejection push cylinder 342. One end of the first spring 361 abuts against the inner stepped portion, and the other end abuts against the clip pushing rod 35. The clip pushing rod 35 is connected to the clip ejection push cylinder 342 through a first pin 362. A long slot 351 extending in the clip ejection direction is formed on the clip pushing rod 35, and the first pin 362 passes through the long slot 351. A second spring 353 is sleeved on the clip ejection push cylinder 342 and the closing push cylinder 341. One end of the second spring 353 abuts against the outer edge of the clip ejection push cylinder 342, and the other end extends between the closing push cylinder 341 and the fixed sleeve 343 and abuts against the inside of the fixed sleeve 343. A third spring 354 is further sleeved on the closing push cylinder 341. One end of the third spring 354 abuts against the fixing piece 355, and the other end abuts against the outer flange 3411 of the closing push cylinder 341. The closing push cylinder 341 is divided into a front sleeve portion 3412 and a rear sleeve portion 3413 by the outer flange 3411. The second spring 353 is sleeved on the rear sleeve portion 3413, and the third spring 354 is sleeved on the front sleeve portion 3412. The fixing piece 355 is fixed to the front end opening of the docking housing 321. A third pin 357 is clamped and fixed on the front end opening side of the docking housing 321. The third pin 357 is located inside the fixing piece 355. The third pin 357 passes through the long slot 351 of the clip pushing rod 35 and the strip-shaped slot 331 of the closing rod 33. The cooperation of the third pin 357 with the long slot 351 and the strip-shaped slot 331 limits the backward (i.e., reset) positions of the clip pushing rod 35 and the closing rod 33. The closing push cylinder 341 is connected to the closing rod 33 through a second pin 356. The second pin 356 also passes through the long slot 351. The second pin 356 is disposed closer to the clamping mechanism 41 than the first pin 362. A clamping groove 3214 for clamping and fixing the fixed sleeve 343 is formed within the external housing 321. In this embodiment, an extension plate 44 is formed by extending the rear end of the moving member 42, and the extension plate 44 is clamped with the closing rod 33. In other embodiments, the moving member 42 can be directly disposed on the closing rod 33. A connecting portion 415 of the clamping mechanism 41 partially overlaps below the closing rod 33, and overlapping comb teeth portions 40 are formed on both the connecting portion 415 and the closing rod 33.

[0053] The clip bin assembly includes a clip bin 37, a push clip plate 38 disposed within the clip bin 37, and a cover plate 39 disposed opposite to the clip bin 37. The push clip plate 38 and the cover plate 39 are disposed opposite to each other on the upper and lower sides of the connecting portion 415 and the closing rod 33, that is, the push clip plate 38 and the cover plate 39 enclose a storage space (not shown) for placing the ligating clip 10, and the connecting portion 415 and the closing rod 33 are partially located within the storage space, and the ligating clip 10 is disposed closer to the cover plate 39 relative to the connecting portion 415 and the closing rod 33. A carding comb portion (not labeled) that cooperates with the comb teeth portion 40 is formed on the clip bin 37. A plurality of reverse grooves 391 are formed on the cover plate 39, and barbs 381 that cooperate with the reverse grooves 391 are formed on the push clip plate 38. A plurality of ligating clips 10 are arranged in the clip bin 37. Long slots 352 and 371 are formed on both the push clip rod 35 and the clip bin 37, and a convex block 392 protrudes from the cover plate 39, and the convex block 392 extends into the long slots 352 and 371 and can move along the axial direction within the long slot 30. The clip bin assembly further includes a push rod 30 that extends under the clamping mechanism 41 to abut against the ligating clip 10 located within the jaw assembly 4.

[0054] In order to make clip formation stable, an extension arm 331 is formed by extending on the outer sleeve 31. The extension arm 331 extends to the lower side of the clamping portion 4111 and further extends towards the extension portion 4112. The extension arm 331 and the moving member 42 are disposed opposite to each other on both sides of the clamping mechanism 41, and the extension arm 331 shields the hook portion 432. In this embodiment, the extension arm 331 and the outer sleeve 31 are of a split type.

[0055] In summary, the above jaw assembly 4 is provided with a moving member 42, and a guiding closing mechanism is disposed between the moving member 42 and the clamping structure, so that the first clamp 411 and the second clamp 412 move between the open position and the closed position through the cooperation between the guiding groove 44 and the guiding post 43 of the guiding closing mechanism, thereby enabling stable firing of the clip applying forceps and improving the clip formation effect of the ligating clip 10.

[0056] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0057] The above embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A jaw assembly includes a clamping mechanism. The clamping mechanism includes a first jaw and a second jaw which are oppositely arranged. The first jaw and the second jaw move between an open position and a closed position to form a clip on a ligating clip located within the clamping mechanism. A symmetry axis is formed between the first jaw and the second jaw. It is characterized in that, The jaw assembly further includes a moving member that can move relative to the clamping mechanism along the direction of the symmetry axis, and a guiding and closing mechanism formed between the moving member and the clamping mechanism. The guiding and closing mechanism includes a guiding post formed on one of the moving member and the clamping mechanism and a guiding groove formed on the other of the moving member and the clamping mechanism. The guiding post moves in the guiding groove to form a first position corresponding to the open position and a second position corresponding to the closed position. The guiding post moves between the first position and the second position to cause the first jaw and the second jaw to move between the open position and the closed position; The opening direction of the guiding groove is perpendicular to the opening direction of the jaw assembly; The extending direction of the guiding groove is substantially the same as the clip discharging direction of the ligating clip; The clamping mechanism further includes a first elastic arm and a second elastic arm, and a connecting portion connecting the first elastic arm and the second elastic arm. The first elastic arm connects the connecting portion and the first jaw, and the second elastic arm connects the connecting portion and the second jaw.

2. The jaw assembly according to claim 1, wherein, The guiding groove includes an obliquely extending portion that causes the first jaw and the second jaw to move between the open position and the closed position. The obliquely extending portion has a first end and a second end that are oppositely arranged. The first end is away from the front end of the clamping mechanism; the obliquely extending portion gradually deflects outward along the opening direction of the clamping mechanism from the first end to the second end.

3. The jaw assembly according to claim 2, wherein, The guiding groove further includes an avoidance groove that bends and extends outward from the first end along the opening direction of the clamping mechanism.

4. The jaw assembly according to claim 3, wherein, The guiding groove further includes a stabilizing groove formed along the longitudinal direction of the clamping mechanism from the second end. The stabilizing groove is parallel to the symmetry axis.

5. The jaw assembly according to claim 4, characterized in that, The guiding groove is formed on the first jaw and / or the second jaw, and the guiding post is formed on the moving member.

6. The jaw assembly according to claim 1 or 5, characterized in that, An anti - detachment structure is formed between the guiding post and the clamping mechanism to limit the detachment of the guiding post and the clamping mechanism in the thickness direction.

7. The jaw assembly according to claim 6, characterized in that, The anti - detachment structure includes a hook portion formed on the guiding post or a convex portion protruding outward from the guiding post, and a hooking surface formed on the clamping mechanism to cooperate with the hook portion or a groove formed on the side wall of the guiding groove to cooperate with the convex portion. The convex portion is an arc - shaped or square - shaped or special - shaped structure; alternatively, the anti - detachment structure includes an obliquely arranged rod wall of the guiding post and a slope surface formed in the guiding groove.

8. A clip applicator, comprising a working head, a handle mounted on the working head for gripping, and a rod body device assembled on the working head, characterized in that, The rod body device includes an outer sleeve tube assembled with the working head, a rod body assembly arranged in the outer sleeve tube, and a jaw assembly as described in any one of claims 1 to 7 assembled on the rod body assembly.

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