CN213665528U - Jaw assembly and clip applier - Google Patents

Abstract

The application relates to a jaw assembly and a clip applier, and belongs to medical surgical devices. The jaw assembly comprises a jaw mechanism, wherein the jaw mechanism comprises two elastic arms arranged oppositely and a pair of jaws formed on the front ends of the two elastic arms in a one-to-one mode, the two jaws move between an opening position and a closing position to clamp the ligation clip in the jaw mechanism, a symmetry axis is formed between the two jaws, an inner groove is formed in the outer side face of at least one elastic arm, the inner groove is provided with a butting wall extending along the direction of the symmetry axis approximately, the jaw assembly further comprises a sleeve piece arranged on the outer side of the elastic arms, the sleeve piece is partially inserted into the inner groove and butts against the butting wall, and the sleeve piece moves along the direction of the symmetry axis to push the butting wall to move along the direction perpendicular to the symmetry axis, so that the two jaws move between the opening position and the closing position. The jaw assembly can enable the trigger of the clip applier to be stable, improve the clamping effect of the ligation clip and reduce the trigger force.

Description

Jaw assembly and clip applier

Technical Field

The utility model relates to a jaw assembly and a forceps, belonging to medical operation devices.

Background

To fully expose the surgical field during surgery, ligation of blood vessels around the target tissue is required to prevent bleeding. Hemostasis technology has become one of the cores of basic operation technology of surgical operation, and the surgical operation of any part of human body involves bleeding and hemostasis almost without exception, and generally the hemostasis is closed by using a clip applying and ligating clip. In use, the clip applier of the prior art is closed by squeezing the sides of the clip through the outer sleeve located at the ends of the clip, which causes the ligation clip to be crossed, twisted and deformed.

Disclosure of Invention

An object of the utility model is to provide a can make the percussion stable, improve into the subassembly of keeping silent that presss from both sides the effect and reduce the percussion force.

In order to achieve the above purpose, the utility model provides a following technical scheme: a jaw assembly comprising a clamping mechanism including two oppositely disposed resilient arms and a pair of jaws formed on the forward ends of the resilient arms, the jaws being movable between an open position and a closed position to clamp a ligation clip disposed within the clamping mechanism, an axis of symmetry being formed between the jaws, at least one of the resilient arms being inwardly recessed on the outer side thereof to form an internal recess, the inner groove is provided with a propping wall which extends along the direction of the symmetry axis, the jaw component also comprises a sleeve sheet which is arranged at the outer side of the elastic arm, the sleeve sheet part is inserted into the inner groove and abuts against the abutting wall, and the sleeve sheet moves along the direction of the symmetry axis to push the abutting wall to move along the direction perpendicular to the symmetry axis, so that the two jaws move between an opening position and a closing position.

Furthermore, each inner groove is provided with two groups of abutting walls which are arranged in parallel or approximately in parallel.

Furthermore, two groups of abutting walls on each inner groove are arranged in the vertical direction in the thickness direction, each inner groove further comprises a connecting wall for connecting the two abutting walls, the two groups of abutting walls and the connecting wall form an inverted step shape, and each sleeve sheet is provided with a hook part matched with the inner groove.

Further, the abutting wall is pushed to move along a direction perpendicular to the symmetry axis so as to form a first position corresponding to the opening position and a second position corresponding to the closing position, and when the sleeve piece moves from the second position to the first position, the two jaws move from the closing position to the opening position under the effect of the elastic force of the elastic arm.

Further, the abutting wall comprises an obliquely extending section which causes the two jaws to move between the opening position and the closing position, the obliquely extending section is provided with a first end and a second end which are oppositely arranged, and the first end is far away from the front end of the jaw mechanism; the oblique extension section gradually deflects outwards from the first end to the second end along the opening direction of the clamping mechanism.

Furthermore, the supporting wall further comprises a stabilizing section which is formed by extending forwards from the second end, and the stabilizing section is parallel to the symmetry axis.

Furthermore, the forceps holder mechanism still includes the connecting portion of connecting two the elastic arm, connecting portion, elastic arm and forceps holder integrated into one piece.

Further, the abutting wall is arranged close to the jaw.

Furthermore, each clamp is provided with an inner groove, and the two inner grooves are symmetrically arranged.

Further, at least one recess is formed on an inner side wall of at least one of the jaws.

Furthermore, a clamping groove for clamping the ligation clip is formed in the inner side wall of the clamp clip in a concave mode, and the depth of the concave portion is larger than that of the clamping groove.

The utility model also provides a execute clamp, include the working head, install handle and the assembly that the working head is last for gripping are in the pole body device of working head, pole body device include with the outer tube of working head assembly, set up and be in body of rod subassembly and the above-mentioned subassembly of keeping silent of assembly on body of rod subassembly in the outer tube.

Furthermore, one side of the jaw assembly is provided with an extension arm, the extension arm and the sleeve sheet are oppositely arranged on two sides of the jaw assembly, and the extension arm extends to the lower part of the clamp.

The beneficial effects of the utility model reside in that: the utility model discloses a subassembly of keeping silent is through forming the inner groovy on the lateral surface at the elastic arm, by the nest plate with this inner groovy support hold the wall cooperation, when making the nest plate move along the symmetry axis direction, can promote to support the direction removal of holding wall perpendicular to symmetry axis, cause two forceps holders to change between open position and closed position, thereby can make the stable one-tenth of just improving the ligature clamp of executing the clamp percussion and press from both sides the effect, and owing to form on the elastic arm with nest plate complex inner groovy, therefore, make the subassembly of keeping silent realize the part and draw the material, reduce stress cross-section, thereby can reduce and hit the power of having an effect. In addition, the abutting wall is arranged on the elastic arm, so that the force applied by the sleeve acts on the elastic arm, the concentration of stress on the clamp is reduced, and compared with the prior art, the required firing force is smaller.

In addition, by forming the recess in the inner side wall of the jaw, the blood vessel can be fitted into the recess when the blood vessel is clamped, thereby contributing to an increase in the clamping force.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of a jaw assembly and a shaft device according to an embodiment of the present invention;

FIG. 2 is an exploded view of the shaft assembly of FIG. 1;

FIG. 3 is an enlarged view of the circle in FIG. 1 with the clamping mechanism in an open position;

FIG. 4 is a schematic view of the clamping mechanism in a closed position;

FIG. 5 is a schematic structural view of the clamping mechanism;

FIG. 6 is a schematic view of a portion of the jaw structure in another orientation;

FIG. 7 is a partial schematic view of the cuff of FIG. 5;

fig. 8 is a schematic view of a working head and a handle of an electric clip applier according to an embodiment of the present invention;

FIG. 9 is a schematic view of the structure of the work head of FIG. 8;

FIG. 10 is a schematic cross-sectional view of FIG. 9;

FIG. 11 is an enlarged view of a portion of another jaw assembly that may be used with the present invention, with the clamping mechanism in an open position;

FIG. 12 is a schematic diagram of a prior art clamping mechanism;

FIG. 13 is an illustration of the jaw assembly of FIG. 11 in use.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

The pincers of executing are used for fixing on the blood vessel at the ligature clamp to block the flow of blood in the blood vessel, the ligature clamp is closed (that is to say press from both sides) and is realized by the subassembly of keeping silent of executing the pincers, and the pincers of executing can also be for electronic pincers of executing for manual pincers of executing, the utility model discloses an embodiment explains as the example with electronic pincers of executing, and electronic pincers of executing are including the subassembly of keeping silent that is used for setting up the ligature clamp, and the subassembly of keeping silent is used for realizing becoming of ligature clamp and press from. Referring to fig. 3 and 4 in conjunction with fig. 1, a jaw assembly 4 according to an embodiment of the present invention includes a clamping mechanism 41 and a strap 42 disposed outside the clamping mechanism 41. The clip 10 is disposed within the clamping mechanism 41, and the clamping mechanism 41 has two positions, an open position (shown in fig. 3) and a closed position (shown in fig. 4), wherein the clip 10 within the clamping mechanism 41 is closed into a clip by movement of the clamping mechanism 41 from the open position to the closed position. The ligating clip 10 is a titanium clip. The clamping mechanism 41 is moved from the open position to the closed position by cooperation with the sleeve 42, and in the actual clamping structure, the clamping mechanism 41 may be mounted on the outer sleeve or the clamping assembly or the rod assembly, but the clamping mechanism 41 is usually only opened or closed and cannot move along the longitudinal direction of the outer sleeve.

Referring to fig. 5, the jaw mechanism 41 includes a first elastic arm 413 and a second elastic arm 414 which are oppositely disposed, a first jaw 411 formed on a front end of the first elastic arm 413, a second jaw 412 formed on a front end of the second elastic arm 414, and a connecting portion 415 connecting the first elastic arm 413 and the second elastic arm 414. The first jaw 411 and the second jaw 412 are relatively movable (the direction of arrows a-a in fig. 3 is the jaw mechanism opening direction), and the first jaw 411 and the second jaw 412 are moved between an open position and a closed position to clamp the ligating clip 10 disposed within the jaw mechanism 41. An axis of symmetry X is formed between the first jaw 411 and the second jaw 412 (the axis of symmetry X extends in the same direction as the longitudinal direction of the outer cannula). The first jaw 411 and the second jaw 412 are identical in structure and are arranged in a mirror image, and the first jaw 411 is taken as an example for detailed description. The first jaw 411 includes a clamping portion 4111 and an extending portion 4112 extending forward from the clamping portion 4111, wherein an end of the clamping portion 4111 away from the extending portion 4112 is named as a terminal end (not numbered) of the first jaw 411, an end of the extending portion 4112 away from the clamping portion 4111 is named as a front end 4113, and the front end 4113 is a front end 4113 of the clamping mechanism 41. A clamping groove 4114 for clamping the ligation clip 10 is formed in an inner sidewall (not numbered) of the clamping portion 4111, and the clamping groove 4114 extends from a distal end of the clamping portion 4111 to the extending portion 4112 and is close to a front end 4113 of the extending portion 4112, but does not penetrate through the front end 4113 of the extending portion 4112.

The first jaw 411, the second jaw 412, the first elastic arm 413, the second elastic arm 414 and the connecting portion 415 are integrally formed, that is, the clamping mechanism 41 is integrally formed. The first elastic arm 413 and the second elastic arm 414 are arranged approximately in parallel in a normal state (normally, the first elastic arm 413 and the second elastic arm 414 expand slightly outwards), and have a moving gap therebetween, and the two arms can move relatively under the action of an external force, and can move oppositely to each other under the action of the elastic force after the external force is removed, so that the two arms return to the relatively parallel state. The first elastic arm 413 and the second elastic arm 414 have the same structure and are arranged in a mirror image, and the structure of the first elastic arm 413 will be described below by taking the first elastic arm 413 as an example. The first elastic arm 413 is linear and long, the thickness of the first elastic arm 413 is smaller than that of the first jaw 411 engaged with the first elastic arm 413, the first elastic arm 413 has a first engaging portion 4131 arranged close to the first jaw 411, specifically, the first engaging portion 4131 is abutted with the first jaw 411, conventionally, the width of the first engaging portion 4131 is gradually widened from the first elastic arm 413 to the first jaw 411 (as shown in fig. 12), however, in the embodiment, an inner groove 416 is formed on the outer side surface of the first engaging portion 4131, and the inner groove 416 has an abutting wall 4161 extending substantially along the direction of the symmetry axis X. In addition, the connecting portion 415 is configured to be drawn (i.e., a drawing groove 4152 is formed), specifically, the connecting portion 415 has a flat portion for connecting with the rod assembly and a second engaging portion 4151 formed on the flat portion, the first elastic arm 413 and the second elastic arm 414 are both connected to the second engaging portion 4151, and the drawing groove 4152 is formed between the second engaging portion 4151 and the first elastic arm 413 and the second elastic arm 414.

Referring to fig. 3 to 6, the sleeve 42 moves along the direction of the symmetry axis X, and the sleeve 42 is located on one side of the first elastic arm 413 and the second elastic arm 414 in the thickness direction of the clamping mechanism 41. In this embodiment, the sleeve 42 is mounted on the rod assembly, and the sleeve 42 is driven by the rod assembly to move along the symmetry axis X, and the sleeve 42 is an arc-shaped sheet-shaped body, but in other embodiments, the sleeve 42 may also be disposed on the outer sleeve, and the sleeve 42 is driven by the outer sleeve to move along the symmetry axis X. The sleeve tab 42 is partially inserted into the inner recess 416 and abuts against the retaining wall 4161. The sleeve 42 moves along the direction of the symmetry axis X to push the abutting wall 4161 to move along the direction perpendicular to the symmetry axis X, so that the first jaw 411 and the second jaw 412 move between the open position and the closed position. The sleeve piece 42 pushes the abutting wall 4161 to move along a direction perpendicular to the symmetry axis X to form a first position (see fig. 3) corresponding to the open position and a second position (see fig. 4) corresponding to the closed position, and when the sleeve piece 42 moves from the second position to the first position, the two first jaws 411 and the second jaw 412 move from the closed position to the open position under the effect of the elastic force of the first elastic arm 413 and the second elastic arm 414, so that the first jaw 411 and the second jaw 412 automatically open without the need of additional parts.

In this embodiment, the first elastic arm 413 and the second elastic arm 414 are both formed with inner grooves 416, and the two inner grooves 416 are symmetrically disposed. However, in other embodiments, an inner groove 416 may be formed on only one of the first and second elastic arms 413, 414, and when the inner groove 416 is formed on only one of the first and second elastic arms 413, 414 and the other is configured as a stationary component, for example, the inner groove 416 is formed on the first elastic arm 413, at this time, the second elastic arm 414 is a fixed component, and when the sleeve piece 42 moves along the direction of the symmetry axis X, the sleeve piece 42 will push the first jaw 411 to move towards the second jaw 412 due to the engagement of the sleeve piece 42 and the abutting wall 4161 of the first elastic arm 413 until the first jaw 411 and the second jaw 412 are closed (i.e., the first jaw 411 and the second jaw 412 are in the closed position).

Each inner groove 416 has two sets of holding walls 4161 arranged in parallel or substantially parallel, specifically: the two sets of holding walls 4161 are respectively named as an upper holding wall 4162 and a lower holding wall 4163. The upper abutting wall 4162 and the lower abutting wall 4163 of each inner groove 416 are arranged in the vertical direction in the thickness direction, wherein the upper abutting wall 4162 is located above the lower abutting wall 4163, and the upper abutting wall 4162 and the lower abutting wall 4163 are arranged in a staggered manner. Each inner groove 416 further includes a connecting wall 4164 connecting the upper retaining wall 4162 and the lower retaining wall 4163. The two sets of abutting walls 4161 and the connecting wall 4164 form an inverted step shape. Each inner groove 416 enhances the pushing force by providing two abutting walls 4161 to increase the contact area. In this embodiment, please refer to fig. 7 and 6, the sleeve piece 42 has a hook 421 matching with the inner groove 416, the hook 421 has two abutting surfaces 422 formed corresponding to the upper abutting wall 4162 and the lower abutting wall 4163 and a horizontal surface 423 connecting the two abutting surfaces 422, and the horizontal surface 423 is located below the connecting wall 4164 to abut against the connecting wall 4164 to prevent the sleeve piece 42 from separating from the inner groove 416.

Each of the holding walls 4161 includes an obliquely extending section 4166 for causing the two jaws to move between the open position and the closed position, and a stabilizing section 4167 formed by extending vertically or substantially vertically from one end of the obliquely extending section 4166, the obliquely extending section 4166 having a first end (not numbered) and a second end (not numbered) which are oppositely disposed, the first end being away from the front end of the jaw mechanism; the obliquely extending section 4166 is gradually offset outwardly in the opening direction of the clamping mechanism from the first end toward the second end. Stability segment 4167 is formed extending forward from the second end, stability segment 4167 being parallel or substantially parallel to the axis of symmetry, a clamping effect being ensured by the provision of stability segment 4167. In the present embodiment, in order to prevent the inner groove 416 and the sleeve piece 42 from being separated when they move relatively, the inclined extension 4166 and the abutment surface 422 are V-shaped, wherein the V-shaped opening of the inclined extension 4166 is disposed outward, specifically, in the present embodiment, the inclined extension 4166 includes a first inclined surface 4168 and a second inclined surface 4169, an included angle between the first inclined surface 4168 and the axis X is smaller than an included angle between the second inclined surface 4169 and the axis X, in detail, the first inclined surface 4168 is substantially parallel to the axis X, and the sleeve piece 42 can be prevented from moving out of the inner groove 416 by the second inclined surface 4169, in the present embodiment, the first inclined surface 4168 and the second inclined surface 4169 are linear profiles, but of course, in other embodiments, the first inclined surface 4168 and the second inclined surface 4169 can also be curved surfaces.

Referring to fig. 8 and 1, the electric clip applier generally comprises a working head 2, a handle 1 mounted on the working head 2 for holding, and a shaft device 3 mounted on the working head 2. The jaw assembly 4 is provided on the shaft device 3. In this embodiment, the handle 1, the working head 2 and the shaft device 3 are detachably connected to each other, so that any one of them can be directly replaced when damaged, and the surgical instrument is not required to be replaced integrally to save medical cost and reduce the economic pressure of patients. The working head 2 and the handle 1, and the working head 2 and the rod body device 3 can be detachably connected by means of clamping, thread fit, insertion and the like, in the embodiment, the working head 2 and the handle 1 are connected by means of clamping, and the working head 2 and the rod body device 3 are connected by means of insertion and the like.

Referring to fig. 8 to 10, the working head 2 includes a housing 21, a driving rod 23 disposed in the housing 21, a first communication assembly, and a rotating head 22 mounted on the housing 21. The housing 21 is opened with an opening 211 for connecting a first communication unit (not shown) to the outside, the opening 211 is positioned in the spin head 22, and a first guide 222 is formed in the spin head 22.

The handle 1 is an electric handle 1, the handle 1 comprises a handle shell 13 with an accommodating cavity, a motor 14 arranged in the accommodating cavity, a control circuit electrically connected with the motor 14, a first switch 11 and a second switch 12 which are arranged on the handle shell 13 and coupled to the control circuit, the working head 2 is further provided with a transmission mechanism 25 for converting the radial force of the motor 14 into the axial force, and the driving rod 23 is connected with the transmission mechanism 25. The first switch 11 is used for driving the driving rod 23 to move forward, and the second switch 12 is used for driving the driving rod 23 to move backward. It is needless to say that the driving component, the control circuit, the first switch 11 and the second switch 12 may be disposed in the working portion, and the driving component, the control circuit, the first switch 11 and the second switch 12 are not limited in detail herein.

Referring to fig. 1, 2 and 9, the shaft device 3 includes a butt portion 32 connected to the working head 2, an outer sleeve 31 fixed to the butt portion 32, a rod assembly disposed in the butt portion 32 and the outer sleeve 31, and a magazine assembly disposed on the rod assembly. In this embodiment, the outer sleeve 31 is fixed to the abutting portion 32, and after the abutting portion 32 is fixed to the working head 2, the outer sleeve 31 does not move in the axial direction with respect to the working head 2. A plurality of ligation clamps 10 are arranged in the clamp bin assembly and are realized through the rod body assembly. The docking part 32 includes a docking housing 321 to be inserted into the spin head 22 and a second communication assembly 322 provided at a front end of the docking housing 321 to be plugged with the first communication assembly. The docking housing 321 is formed with a second guide 323 that cooperates with the first guide 222 to adjust the docking position of the second communication module 322 with the first communication module. When the shaft device 3 is inserted into the rotary head 22, the first guide 222 and the second guide 323 cooperate with each other so that the first communication member and the second communication member 322 are docked, and the driving rod 23 (see fig. 10) is connected to the shaft member.

In this embodiment, the first communication module and the second communication module 322 are not easily docked, wherein the second communication module 322 includes a communication housing 3221 mounted on the docking housing 321 and electrical terminals 3222 disposed in the communication housing 3221, the communication housing 3221 is formed with a rectangular opening 3225 for exposing the electrical terminals 3222, the first communication module includes a docking port plugged into the rectangular opening 3225, and the docking port and the rectangular opening 3225 need to be completely aligned when being docked. Therefore, the design of the first guide 222 and the second guide 323 is important to achieve the effects of being fast, convenient and efficient. Specifically, the first guide 222 includes at least two first bosses 2221 arranged at intervals, the second guide 323 includes at least a second boss 3231 engaged between the at least two first bosses 2221, and the first boss 2221 and the second boss 3231 are arrow-shaped structures. When ready for plugging, the arrows of the first boss 2221 and the second boss 3231 are disposed opposite to each other; after the plugging is completed, the arrows of the first boss 2221 and the second boss 3231 are arranged in a staggered and back-to-back manner.

The communication housing 3221 has a cylindrical structure, an annular protrusion 3224 protrudes from an outer cylindrical surface of the communication housing 3221, a first groove 3211 matched with the protrusion 3224 is disposed on the docking housing 321, and the second communication assembly 322 is rotatable relative to the docking housing 321. Correspondingly, the docking housing 321 is also of a cylindrical structure, a second groove 3212 is disposed on the docking housing 321, and a ball 221 engaged with the second groove 3212 is disposed on the rotating head 22. The insertion process of the shaft device 3 into the rotary head 22 is: the communication housing 3221 is rotated relative to the docking housing 321 to adjust the position of the second communication element 322, such that the second projection 3231 substantially corresponds to the position of the first communication element while the second communication element 322 corresponds to the position of the first communication element, and the interval between the two first projections 2221 is substantially corresponding to the second projection 3231. When the shaft device 3 is inserted into the rotating head 22, the position of the shaft device 3 is finely adjusted so that the second boss 3231 is matched with the first boss 2221 until the rectangular opening 3225 is completely butted against the butting interface, and at this time, the second groove 3212 is clamped with the ball 221. After the shaft device 3 is inserted into the rotating head 22, when the rotating head 22 is rotated to adjust the angle of the shaft device 3, since the second communication component 322 is kept in a stationary state in the docking with the first communication component, the docking housing 321 is rotated compared to the second communication component 322 to complete the angle adjustment of the shaft device 3.

The rod assembly comprises a closing push cylinder 341 arranged in the docking shell 321, a clip-out push cylinder 342 arranged in the closing push cylinder 341, a fixed sleeve 343 sleeved between the closing push cylinder 341 and the docking shell 321, and a closing rod 33 and a clip-out rod 35 arranged in the outer sleeve 31. A first spring 361 is arranged in the clip-ejecting pusher 342, and the clip-ejecting pusher 342 passes through the communication housing 3221 to abut against a driving rod in the working head 2, so as to push the clip-ejecting pusher 342 to move along the clip-ejecting direction through a transmission assembly in the working head 2. The clip ejecting cylinder 342 is provided with a first spring 361, and the clip ejecting cylinder 342 is provided with an inner step (not shown). One end of the first spring 361 abuts against the inner step portion, the other end abuts against the push-clamp lever 35, the push-clamp lever 35 is connected to the clip-ejecting push cylinder 342 by a first pin 362, a long groove 351 extending in the clip-ejecting direction is formed in the push-clamp lever 35, and the first pin 362 penetrates through the long groove 351. The clamp-out pusher 342 and the closing pusher 341 are sleeved with a second spring 353, one end of the second spring 353 abuts against the outer edge of the clamp-out pusher 342, and the other end of the second spring 353 extends into the space between the closing pusher 341 and the fixing sleeve 343 and abuts against the fixing sleeve 343. The closing cylinder 341 is further sleeved with a third spring 354, one end of the third spring 354 abuts against the fixing piece 355, the other end abuts against an outer flange 3411 of the closing cylinder 341, the closing 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 case 321. The front opening side of the docking housing 321 is provided with a third pin 357, the third pin 357 is located inside the fixing plate 355, the third pin 357 passes through the long groove 351 of the push-clamp lever 35 and the strip-shaped groove 331 of the closing lever 33, and the third pin 357 cooperates with the long groove 351 and the strip-shaped groove 331 to limit the backward (i.e., return) position of the push-clamp lever 35 and the closing lever 33. The closure pusher 341 is connected to the closure rod 33 by a second pin 356, the second pin 356 likewise passing through the elongated slot 351, the second pin 356 being disposed closer to the clamping mechanism 41 than the first pin 362. A fastening groove 3214 for fastening the fixing sleeve 343 is formed in the outer housing 321. In this embodiment, the rear end of the sleeve sheet 42 is extended to form an extension plate 44, and the extension plate 44 is clamped with the closing rod 33, in other embodiments, the sleeve sheet 42 may be directly disposed on the closing rod 33. The connecting portion 415 of the clamping mechanism 41 is partially overlapped below the closing rod 33, and the overlapping comb portion 40 is formed on both the connecting portion 415 and the closing rod 33.

The cartridge assembly includes a cartridge case 37, a push plate 38 disposed within the cartridge case 37, and a cover plate 39 disposed opposite the cartridge case 37. The push plate 38 and the cover plate 39 are oppositely disposed on the upper and lower sides of the connecting portion 415 and the closing rod 33, that is, the push plate 38 and the cover plate 39 enclose a storage space (not shown) for placing the ligation clip 10, the connecting portion 415 and the closing rod 33 are partially located in the storage space, and the ligation clip 10 is disposed close to the cover plate 39 relative to the connecting portion 415 and the closing rod 33. The magazine case 37 is formed with a comb-engaging portion (not numbered) that engages with the comb teeth portion 40. The cover plate 39 is formed with a plurality of reverse grooves 391, and the push plate 38 is formed with barbs 381 to fit the reverse grooves 391. A plurality of ligation clips 10 are arranged within a clip magazine 37. Both the push-clamp rod 35 and the clamp magazine 37 are formed with elongated slots 352, 371, the cover 39 is formed with a protruding block 392, and the protruding block 392 extends into the elongated slots 352, 371 and can move in the elongated slots 352, 371 along the axial direction. The clip magazine assembly also includes a push rod 30 that extends into the underside of the clamping mechanism to hold the ligation clip 10 in the jaw assembly 4.

Referring to fig. 2 and 5 in conjunction with fig. 3 and 4, in order to stabilize the clamping, an extension arm 311 is extended from the outer sleeve 31, the extension arm 311 is disposed on one side of the jaw assembly, and the extension arm 311 is disposed on the opposite side of the jaw assembly from the sleeve sheet 42. Specifically, the extension arm 311 extends to a lower portion of the clamping portion 4111 and further extends toward the extension portion 4112, the extension arm 311 and the sleeve piece 42 are disposed at two sides of the jaw assembly, and the extension arm 311 shields the hook portion 432. In this embodiment, the extension arm 311 and the outer sleeve 31 are integrally formed, but in other embodiments, the extension arm 311 and the outer sleeve 31 may also be separately arranged, that is, the extension arm 311 is fixed on the outer sleeve 31 by a fastener or by welding. Additionally, in other embodiments, the extension arm 311 may be disposed on other components that do not move. By extending the extension arm 311 to the lower side of the clamping portion 4111, the hanging portion of the first jaw 411 and the second jaw 412 is reduced, so that the first jaw 411 and the second jaw are prevented from being twisted under the action of stress, which helps to stabilize the clamping.

Referring to fig. 11 and 13, the jaw assembly may also be configured such that at least one of the first jaw 411 and the second jaw 412 has a recess 47 formed on an inner sidewall thereof. The depth of the recess 47 is larger than the depth of the grip groove 4114. Of course, in other embodiments, the inner portion 47 may be formed on only one of the first jaw 411 or the second jaw 412, and of course, the number of the concave portions 47 may be multiple according to actual requirements. By forming the recess 47 on the inner side wall of at least one of the first jaw 411 and the second jaw 412, the blood vessel 20 can be inserted into the recess 47 when the blood vessel 20 is clamped, thereby contributing to an increase in the clamping force. It should be noted that, the jaw assembly in this embodiment may use a special ligating clip, and a bending portion corresponding to the recess 47 is formed on the ligating clip, specifically, the ligating clip includes two oppositely disposed clipping arms and an elastic connecting portion connecting the two clipping arms, and the clipping arms are bulged outwards to form a bending portion, and when the ligating clip enters the jaw assembly, the clipping arms are placed in the clipping grooves, and the bending portion is placed in the recess 47. When the ligation clip of the embodiment is formed, the most distal end of the ligation clip is stressed and closed to a certain degree, and the proximal part of the semi-closed titanium clip is closed again to prevent the blood vessel from horizontally sliding outwards. The number of curved portions of the clip is set according to the number of mating recesses 47.

In summary, the above-mentioned jaw assembly forms the inner groove 416 on the outer side surface of the elastic arm, and the sleeve sheet 42 is matched with the abutting wall 4161 of the inner groove 416, so that when the sleeve sheet 42 moves along the direction of the symmetry axis X, the abutting wall 4161 can be pushed to move in the direction perpendicular to the symmetry axis X, so that the two jaws change between the open position and the closed position, thereby stabilizing the firing of the clip applier and improving the forming effect of the ligating clip. In this embodiment, the inner groove 416 is provided close to the jaw, so that the offset of the clamping mechanism 41 is reduced during clamping, and the clamping effect is ensured. In addition, by providing the abutment walls 4161 on the resilient arms, the force exerted by the sleeve 42 acts on the resilient arms, thereby reducing the concentration of stress on the jaws, requiring less firing force than in the prior art.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (13)

1. A jaw assembly comprising a clamping mechanism including two oppositely disposed resilient arms and a pair of jaws formed on the forward ends of the resilient arms, the jaws being movable between an open position and a closed position to clamp a ligation clip disposed within the clamping mechanism, an axis of symmetry being formed between the jaws, characterized in that an inner groove is formed on the outer side surface of at least one elastic arm in an inwards concave mode, the inner groove is provided with a propping wall extending along the direction of the symmetry axis approximately, the jaw assembly also comprises a sleeve sheet arranged outside the elastic arm, the sleeve sheet is partially inserted into the inner groove and abuts against the abutting wall, the sleeve piece moves along the direction of the symmetry axis to push the abutting wall to move along the direction perpendicular to the symmetry axis, so that the two jaws move between an opening position and a closing position.

2. The jaw assembly of claim 1 wherein each of said inner recesses has two sets of abutment walls arranged in parallel or substantially parallel.

3. The jaw assembly of claim 2 wherein the two sets of abutment walls of each of said inner grooves are disposed in a vertical direction in the thickness direction, each of said inner grooves further comprises a connecting wall connecting the two abutment walls, the two sets of abutment walls and the connecting wall form an inverted step shape, and said sleeve has a hook portion engaging with said inner groove.

4. The jaw assembly of claim 1 wherein said sleeve urges said retaining wall to move in a direction perpendicular to said axis of symmetry to define a first position corresponding to said open position and a second position corresponding to said closed position, said sleeve moving from said closed position to said open position under the force of said resilient arm as said sleeve moves from said second position to said first position.

5. The jaw assembly of claim 1 wherein said retaining wall includes an obliquely extending section for causing movement of said jaws between an open position and a closed position, said obliquely extending section having oppositely disposed first and second ends, said first end being remote from a front end of said clamping mechanism; the oblique extension section gradually deflects outwards from the first end to the second end along the opening direction of the clamping mechanism.

6. The jaw assembly of claim 5 wherein said retaining wall further comprises a stabilizing segment extending forwardly from said second end, said stabilizing segment being parallel to said axis of symmetry.

7. The jaw assembly of claim 1 wherein said clamping mechanism further comprises a connecting portion connecting said spring arms, said connecting portion, spring arms and clamp being integrally formed.

8. The jaw assembly of claim 1 wherein said retaining wall is disposed proximate said jaw.

9. The jaw assembly of claim 1 wherein each of said jaws has an internal recess therein, said internal recesses being symmetrically disposed.

10. The jaw assembly of any of claims 1-9, wherein at least one recess is formed in an inner sidewall of at least one of said jaws.

11. The jaw assembly of claim 10 wherein said inner side walls of said jaws are recessed to define a gripping slot for gripping said ligating clip, said recess having a depth greater than a depth of said gripping slot.

12. A clip applier comprising a working head, a handle mounted on said working head for grasping, and a shaft means mounted on said working head, wherein said shaft means comprises an outer sleeve mounted with said working head, a shaft member disposed within said outer sleeve, and a jaw member according to any one of claims 1 to 11 mounted on said shaft member.

13. The clip applier of claim 12, wherein said jaw assembly is provided with extension arms on one side thereof, said extension arms being disposed on opposite sides of said jaw assembly from said sleeve, said extension arms extending below said jaws.

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