CN115644975A - Self-locking clip applier - Google Patents

Abstract

The invention provides a self-locking clip applier, wherein a containing cavity is formed in the pipe wall of a pipe body of a clip bin assembly, a through hole communicated with the inside of the pipe body is formed in the side part, close to the inside of the pipe body, of the containing cavity, the containing cavity is provided with a stop structure and an electromagnet electrically connected with a second connector, the electromagnet is electrified, and an adsorption stop structure moves to an unlocking position from a locking position; the near end of the main shaft is provided with a supporting part which is tightly attached to the inner wall of the tube body, and the outer wall of the supporting part is provided with a locking structure corresponding to the stopping structure; when the stopping structure is located at the locking position, the end part of the stopping structure penetrates through the through hole to extend into the pipe body and can be matched with the locking structure, so that the main shaft is locked at the feeding and clamping position; when the stop structure is located at the unlocking position, the end part of the stop structure can retract into the through hole, and the main shaft is allowed to move between the initial position and the firing position. By controlling the electromagnet to be powered on or off, the stable work of the clamp applier is guaranteed, and meanwhile the clamping bin assembly is pulled out when the main shaft is located at the clamp sending position, and the main shaft is locked.

Description

Self-locking clip applier

Technical Field

The invention relates to the technical field of medical instruments, in particular to a self-locking clip applier.

Background

Endoscopic surgery (including laparoscope, thoracoscope and other endoscopic-based surgeries) is one of the biggest advances in 21 st century medicine, and at present, the endoscopic surgery has been deeply performed in various fields of surgical treatment, including but not limited to department departments such as general surgery, thoracic surgery, urology, obstetrics and gynecology, otorhinolaryngology and the like, and a series of complicated and difficult surgeries such as pancreaticoduodenectomy, hepatectomy, gastric cancer radical surgery, nephrectomy, hysterectomy and the like, and can be performed under an endoscope at present.

At present, most of clip appliers in clinical application are single-hairstyle, and after each clip application, the clip appliers are pulled out of a body through a puncture outfit, and then are clipped by an apparatus nurse again, and then the apparatus is sent into the body through the puncture outfit. Each clamping procedure is not only time-consuming but also affects the consistency of the operation. Under the condition of heavy bleeding, the surgeon can lose the visual field within seconds of clamping, and the operation safety is threatened.

At present, a small part of clinical application clip appliers are continuous hair type clip appliers, and the continuous hair type clip appliers manually triggered are easy to clamp and fall off in the pushing process of a hemostatic clip, so that the use experience in the operation is greatly influenced. The falling of the hemostatic clamp not only causes the waste of the hemostatic clamp, but also needs to be taken out, and additionally increases the operation time.

Thus, surgeons desire an automatic, repeatable, less prone to jamming and falling clip applier that can be disassembled and assembled according to the surgical procedure.

As shown in fig. 1 and 2, an automated, burst-type clip applier generally includes a handle 8 and a clip cartridge assembly 9, clip cartridge assembly 9 being removably mounted to handle 8. The clamping cabin assembly 9 comprises a main shaft 1, a resetting piece, a clamp conveying structure 3, a firing structure 4, a clamping cabin structure, a pipe body 5 and a sleeve 6 which are sequentially communicated from near to far; the proximal end of the main shaft 1, the proximal end of the clip feeding structure 3 and the proximal end of the firing structure 4 are all inserted into the tube body 5, and the distal end of the clip feeding structure 3 and the distal end of the firing structure 4 are all inserted into the sleeve 6; the reset piece is accommodated in the tube body 5; the clamping bin structure comprises a clamping bin fixedly installed in the sleeve 6, more than two ligation clamps are sequentially arranged in the clamping bin from near to far, and a jaw 32 with a far end extending out of the sleeve 6 is arranged at the far end of the clamping bin. The resetting piece comprises a first resetting piece 21 positioned between the main shaft 1 and the clamp conveying structure 3, a second resetting piece 22 positioned between the main shaft 1 and the tube body 5, and a third resetting piece 23 positioned between the firing structure 4 and the tube body 5. The working principle of the shaft assembly can be referred to chinese patent CN112704539a with application date of 2019, 10 and 25 and publication date of 2021, 04 and 27, which is incorporated in this patent as CN112704539a in its entirety and will not be described herein again. In the using process of the automatic clip applier, the general operation process is as follows: pressing a clamp sending button, automatically controlling the main shaft 1 to move far from an initial position by the handle 8, driving the clamp sending structure 3 to work through the first resetting piece 21, sending the ligation clamps in the clamp bin structure to the jaw 32, and then pausing (at the moment, the main shaft is located at the clamp sending position); then the user rotates the jaw 32 to the clamping position of the blood vessel to be clamped, then presses the trigger button, the handle 8 automatically controls the main shaft 1 to continuously move far and abut against the trigger structure 4 to drive the trigger structure 4 to work, the jaw 32 is closed, the ligation clamp in the jaw 32 clamps the blood vessel (at this moment, the main shaft is located at the trigger position), the handle 8 automatically controls the main shaft 1 to reset again, the clamp sending structure and the trigger structure 4 are driven to reset through the resetting of the first resetting piece 21, the second resetting piece 22 and the third resetting piece 23, and preparation is made for the next blood vessel clamping operation. From the above operation process, since the trigger operation and the reset operation of the clip applier are automatically and continuously performed, the clip applier can replace the clip bin assembly at the time of completing clip feeding of the clip applier and at the time of completing reset of the clip applier.

However, for clip appliers with replaceable clip magazine assemblies, if the clip magazine assembly is pulled out when clip delivery is complete, the spindle springs back from the delivery position to the initial position due to the restoring force of the return element in the clip magazine assembly, and the ligation clip in the clip magazine structure is delivered to the jaws. When multiplexing this double-layered storehouse subassembly again and sending and press from both sides, the main shaft need be followed the initial position and started to send in proper order and press from both sides, percussion and reset work, because there has the ligature to press from both sides in the jaw of pressing from both sides the storehouse structure to press from both sides and have had, can cause to send to press from both sides the hindrance to the clamp of sending of the multiplexing in-process of double-layered storehouse subassembly, leads to sending to press from both sides the failure.

Therefore, it is common at present to replace the clip magazine assembly when the clip applier is reset and to provide a check mechanism in the clip applier to only allow replacement of the clip magazine assembly when the clip applier is reset to ensure stable operation of the clip applier. Thus, the freedom of operation of the user when using the clip applier is greatly limited, making the operation cumbersome.

Disclosure of Invention

Technical problem to be solved

In view of the problems in the art described above, the present invention is at least partially addressed. To this end, the invention proposes a self-locking clip applier which, when the spindle is in the clip-feeding position, pulls out the cartridge assembly, the spindle being able to be locked.

(II) technical scheme

In order to achieve the purpose, the invention adopts the main technical scheme that:

the invention provides a self-locking clip applier, which comprises a handle and a clip bin assembly, wherein the handle is connected with the clip bin assembly; the clamping bin assembly comprises a tube body and a main shaft, the near end of the main shaft is inserted into the tube body and used for pushing the feeding and clamping structure and the firing structure to work, the tube body is detachably connected with the clamping bin mounting position of the handle, and the driving mechanism in the handle drives the main shaft to move between an initial position, a feeding and clamping position and a firing position which are arranged from near to far;

a first connector electrically connected with a power supply system in the handle is arranged on the clamping bin mounting position, a second connector is arranged at the position of the pipe body corresponding to the first connector, and when the pipe body is connected to the clamping bin mounting position, the first connector is contacted with the second connector;

the pipe wall of the pipe body is internally provided with an accommodating cavity, the side part of the accommodating cavity close to the inside of the pipe body is provided with a through hole communicated with the inside of the pipe body, the accommodating cavity is provided with a stop structure and an electromagnet electrically connected with the second connector, the electromagnet is electrified, and the adsorption stop structure moves from a locking position to an unlocking position; the near end of the main shaft is provided with a supporting part which is tightly attached to the inner wall of the tube body, and the outer wall of the supporting part is provided with a locking structure corresponding to the stopping structure;

when the stopping structure is located at the locking position, the end part of the stopping structure penetrates through the through hole to extend into the pipe body and can be matched with the locking structure, so that the main shaft is locked at the feeding and clamping position; when the stop structure is located at the unlocking position, the end part of the stop structure can retract into the through hole, and the main shaft is allowed to move between the initial position and the firing position.

Optionally, the stopping structure comprises a first stopping piece, the first stopping piece and the electromagnet are sequentially arranged in a direction from the inside of the pipe body to the outside of the pipe body, the first stopping piece is abutted against the side part, close to the inside of the pipe body, of the accommodating cavity, the first end of the first stopping piece penetrates through the through hole and extends into the pipe body, and the second end of the first stopping piece is connected with the electromagnet through a pre-compressed first elastic piece; the electromagnet is electrified, the first stopping piece is adsorbed to move outwards to the unlocking position, and the first end of the first stopping piece is contracted into the through hole.

Optionally, the first stop member comprises a stop portion and a groove portion, wherein the stop portion and the groove portion are sequentially connected in a direction pointing to the outside of the tube body; the free end of the stopping part passes through the through hole and extends into the tube body, and the groove bottom of the groove part is connected with the electromagnet through the pre-compressed first elastic part.

Optionally, the accommodating cavity is a long strip extending along the far and near direction, and the groove part is provided with two opposite groove walls which are sequentially arranged along the far and near direction; two cell walls that set up relatively carry on spacingly to the near-far direction of first elastic component, and the left side wall and the right side wall in holding chamber carry on spacingly to the first elastic component left and right directions.

Optionally, a stand column extending to the electromagnet is arranged at the center of the bottom of the groove portion, the first elastic element is a spring, and the spring is sleeved on the stand column and connected with the bottom of the groove portion.

Optionally, the locking structure is a blocking groove; the free end of the stopping part is provided with a near end wall and a far end wall, the near end wall is an inclined wall which is inclined towards the near end in the direction pointing to the outside of the tube body in the tube body, and the inclined wall at least extends to be flush with the inner wall of the tube body; the far end wall is a stop wall, when the main shaft moves far to the clamp sending position, the free end of the stop part extends into the stop groove, and the stop wall is matched with the far end wall of the stop groove to stop the main shaft from moving near.

Optionally, the main shaft moves to more than two clip feeding positions which are arranged from near to far to realize the clip feeding of ligation clips with different models; the side part of the accommodating cavity close to the inner part of the tube body is correspondingly provided with more than two through holes corresponding to the locking structures, and the through holes correspond to the feeding and clamping positions one by one; more than two first stop pieces are accommodated in the accommodating cavity, and the first stop pieces are arranged in one-to-one correspondence with the through holes; when the main shaft is positioned at a certain feeding and clamping position, the locking structure is matched with the first stop piece corresponding to the feeding and clamping position to stop the main shaft from moving towards the near end of the tube body.

Optionally, the through hole is a transverse taper hole, and a small end of the transverse taper hole is communicated with the inside of the pipe body;

the stopping structure comprises a second stopping piece and a locking bead, the second stopping piece and the electromagnet are sequentially arranged in the axial direction of the pipe body, the accommodating cavity is provided with a first side wall and a second side wall which are arranged along the far-near direction, the second stopping piece is abutted against the first side wall and is connected with the first side wall through a pre-stretched second elastic piece, and a transverse accommodating cavity is formed in the position, corresponding to the transverse taper hole, of the second stopping piece; the locking ball is positioned in the transverse taper hole, the first end of the locking ball penetrates through the transverse taper hole and extends into the tube body, and the second end of the locking ball is in contact with the second stop piece;

the electromagnet is electrified, the second stop piece is adsorbed to move to the unlocking position towards the second side wall, the transverse accommodating cavity is communicated with the transverse taper hole, and the locking bead can move to the transverse accommodating cavity to shrink into the transverse taper hole.

Optionally, the second stop member includes a bearing portion and a protrusion sequentially connected in a direction pointing to the outside of the tube body, and the protrusion is disposed at one end of the bearing portion close to the electromagnet; the second elastic piece is arranged between the bulge and the first side wall, and the bulge is connected with the first side wall through the pre-stretched second elastic piece; after the electromagnet is electrified, the end wall of the electromagnet adsorption bearing part close to the electromagnet and the end wall of the bulge close to the electromagnet are connected.

Optionally, the accommodating cavity is an annular accommodating cavity surrounding the inside of the tube body, the stop piece is an annular stop piece surrounding the inside of the tube body, and the electromagnet is an annular electromagnet surrounding the inside of the tube body; horizontal taper holes are formed in at least two opposite sides of the side portion, close to the inside of the pipe body, of the annular accommodating cavity, and second elastic pieces are arranged on at least two opposite sides of the stop piece.

Optionally, 3 horizontal taper holes are uniformly formed in the annular accommodating cavity on the side portion close to the inside of the pipe body along the annular direction.

Optionally, the annular stop member includes an annular bearing portion and an annular protrusion sequentially connected in a direction pointing to the outside of the pipe body, and the annular protrusion is disposed at one end of the annular bearing portion close to the electromagnet; the second elastic piece is arranged between the annular bulge and the first side wall, and the annular bulge is connected with the first side wall through the pre-stretched second elastic piece; after the electromagnet is electrified, the end wall of the electromagnet adsorption annular bearing part close to the electromagnet and the end wall of the annular bulge close to the electromagnet are attracted by the electromagnet.

Optionally, the main shaft comprises an inner shaft and an outer shaft as a supporting part, the inner shaft and the outer shaft are sleeved with each other, the outer shaft is positioned at the proximal end of the inner shaft, and the inner shaft is used for connecting with the feeding and clamping structure and the firing structure; the outer shaft is connected with the inner shaft in a linkage manner in the far and near directions, and the inner shaft is rotatably connected with the outer shaft around the axis of the main shaft; the locking structure is disposed on the outer shaft.

(III) advantageous effects

The invention has the beneficial effects that:

according to the clip applier provided by the invention, through the matching of the electromagnet and the stop structure, when the main shaft is positioned at the clip sending position, the electromagnet is powered off, the stop structure can be matched with the locking structure to lock the main shaft at the clip sending position, the main shaft is subjected to clip sending, triggering and resetting work, when the main shaft needs to move between the initial position and the triggering position, the electromagnet can be powered on, and the adsorption stop structure moves to the unlocking position to allow the main shaft to move between the initial position and the triggering position. Therefore, the clip applier provided by the invention realizes the locking of the main shaft when the main shaft moves far to the clip feeding position while the clip applier is not influenced to carry out clip feeding, triggering and resetting, and the clip bin assembly is pulled out when the clip feeding of the clip applier is finished (namely the main shaft moves far to the clip feeding position), so that the main shaft is prevented from rebounding to the initial position from the clip feeding position due to the restoring force of the resetting piece, and therefore, when the clip bin assembly is reused for clip feeding again, the main shaft can be driven by the driving shaft in the handle to directly start working from the clip feeding position, and the clip feeding failure caused by the existing ligating clip in the jaw is avoided.

Drawings

The invention is described with the aid of the following figures:

FIG. 1 is a schematic view of the overall structure of a prior art cartridge assembly;

FIG. 2 is a schematic proximal end cross-sectional view of the cartridge assembly of FIG. 1, with the spindle in an initial position;

FIG. 3 is a schematic view of the overall structure of a clip applier according to embodiment 1 of the invention;

FIG. 4 is a schematic cross-sectional view of a clip applier according to embodiment 1 of the invention, with the spindle in the initial position;

FIG. 5 is an enlarged proximal end view of the cartridge assembly of FIG. 4;

FIG. 6 is an enlarged schematic view at A in FIG. 5;

FIG. 7 is a schematic cross-sectional view of a clip applier according to embodiment 1 of the invention, with the spindle in the feeding position;

FIG. 8 is an enlarged proximal end view of the cartridge assembly of FIG. 7;

FIG. 9 is a schematic cross-sectional view of a clip applier according to embodiment 1 of the invention, with the main shaft in the firing position;

FIG. 10 is an enlarged proximal end view of the cartridge assembly of FIG. 9;

fig. 11 is a schematic perspective view of a first stopper according to embodiment 1 of the present invention;

fig. 12 is a schematic perspective view of an inner wall of a pipe body according to embodiment 1 of the present invention;

fig. 13 is a perspective view of an outer shaft according to embodiment 1 of the present invention;

fig. 14 is a schematic cross-sectional view of a clip applier according to embodiment 2 of the invention, with the spindle in the initial position and the electromagnets in the de-energized state;

FIG. 15 is an enlarged proximal end view of the cartridge assembly of FIG. 14;

FIG. 16 is an enlarged schematic view at B in FIG. 15;

FIG. 17 is a schematic cross-sectional view of a clip applier according to embodiment 2 of the invention, with the spindle in the feeding position and the electromagnets energized;

FIG. 18 is an enlarged proximal end view of the cartridge assembly of FIG. 17;

FIG. 19 is a schematic cross-sectional view of a clip applier according to embodiment 2 of the invention, with the spindle in the feeding position and the electromagnets in the de-energized state;

FIG. 20 is an enlarged proximal end view of the cartridge assembly of FIG. 19;

FIG. 21 is a schematic cross-sectional view of a clip applier according to embodiment 2 of the invention, with the spindle in the firing position and the electromagnets energized;

FIG. 22 is an enlarged proximal end view of the cartridge assembly of FIG. 21;

fig. 23 is a schematic perspective view of a second stopper according to embodiment 2 of the present invention.

[ description of reference ]

1: a main shaft;

11: blocking the groove; 12: an inner shaft; 13: an outer shaft; 14: a chute; 15: a locking bead;

21: a first reset member; 22: a second reset member; 23: a third reset member;

3: a clip feeding structure;

32: a jaw;

4: a firing mechanism;

5: a pipe body;

51: a second connector; 52: an accommodating cavity; 53: a through hole; 54: a first stopper; 55: an electromagnet; 57: a first elastic member; 58: a second stopper; 59: a second elastic member;

541: a stopper portion; 542: a groove part; 543: the bottom of the tank; 544: a trench wall; 545: a column; 546: a sloped wall; 547: a stopper wall; 548: a bearing part; 549: a protrusion; 550: an accommodating chamber;

6: a sleeve;

8: a handle;

81: a first connector; 82: a transverse shell portion; 83: a longitudinal shell portion; 84: inserting into the channel; 85: a power supply system; 86: a linear motor; 87: a drive shaft;

9: a clamping bin assembly.

Detailed Description

For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings. Herein, "proximal" refers to the side closer to the operator, and "distal" refers to the side closer to the patient. As used herein, the terms "upper," "lower," "front," "rear," "left," "right," and like terms of orientation refer to the orientation of FIGS. 2 and 3, wherein a proximal-to-distal direction is also a rear-to-front direction.

Example 1

To solve the above technical problems, the present embodiment provides a clip applier that can be self-locked, based on the structure of the clip applier described in the background.

As shown in fig. 3 to 6, the present embodiment provides a self-lockable clip applier, comprising a handle 8 and a clip cartridge assembly 9; the clamping bin assembly 9 comprises a tube body 5 and a main shaft 1, the near end of the main shaft is inserted into the tube body 5 and used for pushing the feeding and clamping structure and the triggering structure to work, the tube body 5 is detachably connected with a clamping bin mounting position of the handle 8, and a driving mechanism in the handle 8 drives the main shaft 1 to move between the feeding and clamping position and the triggering position at an initial position from near to far. Be provided with the first connector 81 of electrically connecting with the inside power supply system 85 of handle 8 on pressing from both sides the storehouse installation position, body 5 corresponds first connector 81 position and is provided with second connector 51, and when body 5 connects at pressing from both sides the storehouse installation position, first connector 81 and second connector 51 contact.

A containing cavity 52 is formed in the pipe wall of the pipe body 5, a through hole 53 communicated with the inside of the pipe body 5 is formed in the side part, close to the inside of the pipe body 5, of the containing cavity 52, the containing cavity 52 is provided with a stop structure and an electromagnet 55 electrically connected with the second connector 51, the electromagnet 55 is electrified, and the adsorption stop structure moves from a locking position to an unlocking position; the near end of the main shaft 1 is provided with a supporting part tightly attached to the inner wall of the tube body 5, and the outer wall of the supporting part is provided with a locking structure corresponding to the stopping structure. When the stopping structure is located at the locking position, the end part of the stopping structure penetrates through the through hole 53 and extends into the pipe body 5, and can be matched with the locking structure, so that the main shaft 1 is locked at the feeding and clamping position; when the stop structure is in the unlocking position, the end of the stop structure can retract into the through hole 53, and the main shaft 1 is allowed to move between the initial position and the firing position.

Through the cooperation of electro-magnet 55 and detent structure, electro-magnet 55 outage when main shaft 1 is located to send and presss from both sides the position, detent structure can with the cooperation of locking structure, with main shaft 1 locking send the position of pressing from both sides, send the clamp, percussion and reset work at main shaft 1, when needing to move between initial position and percussion position, electro-magnet 55 can be circular telegram, adsorb detent structure and remove to the unblock position, allow main shaft 1 to move between initial position and percussion position. Therefore, the clip applier provided by the invention realizes the locking of the main shaft when the main shaft 1 moves far to the clip sending position while the clip applier is not influenced to carry out clip sending, triggering and resetting, and the clip bin assembly 9 is pulled out when the clip sending of the clip applier is finished (namely, the main shaft moves far to the clip sending position), so that the main shaft 1 is prevented from rebounding to the initial position from the clip sending position due to the restoring force action of the resetting piece, and therefore, when the clip bin assembly 9 is reused again for clip sending, the driving shaft 87 in the handle 8 can drive the main shaft 1 to directly start working from the clip sending position, and the clip sending failure caused by the existing ligating clip in the jaw 32 is avoided.

Wherein the stop structure comprises a first stop member 54, the first stop member 54 and the electromagnet 55 are arranged in sequence in a direction from the inside of the pipe body 5 to the outside of the pipe body 5, the first stop member 54 abuts against the side portion of the accommodating chamber 52 close to the inside of the pipe body 5, a first end of the first stop member 54 passes through the through hole 53 and extends into the pipe body 5, and a second end of the first stop member 54 is connected with the electromagnet 55 through a pre-compressed first elastic member 57. The electromagnet 55 is energized, the first stopper 54 is attracted and moved to the unlock position outside the pipe body 5, and the first end of the first stopper 54 is retracted into the through hole 53.

With the stop structure, the first end of the first stop 54 is contracted into the through hole 53, and the main shaft 1 is allowed to move from the initial position to the firing position; when the main shaft 1 moves far to the clip sending position, the electromagnet 55 is powered off, the first end of the first stop piece 54 is matched with the locking structure to prevent the main shaft 1 from moving near, the locking of the main shaft 1 when the main shaft 1 moves far to the clip sending position is realized while the clip sending and the triggering of the clip applier are not influenced, the clip bin assembly 9 is pulled out when the clip sending of the clip applier is finished (namely, the main shaft 1 moves far to the clip sending position), the main shaft 1 is prevented from rebounding to the initial position from the clip sending position due to the restoring force action of the reset piece, and therefore when the clip bin assembly 9 is reused for clip sending, the driving shaft 87 in the handle 8 can drive the main shaft 1 to directly start working from the clip sending position, and the clip sending failure caused by existing ligating clips in a jaw is avoided. In the process that the main shaft 1 moves from the triggering position to the initial position (namely, in the resetting process), the first end, extending to the inside of the tube body 5, of the first stop piece 54 can prevent the main shaft 1 from being reset normally, so that in the process that the main shaft 1 moves from the triggering position to the initial position, the electromagnet 55 is electrified, the first end of the first stop piece 54 is adsorbed and contracted into the through hole 53, the first stop piece 54 is prevented from influencing the normal resetting work of the main shaft 1, and preparation is made for the next blood vessel clamping operation. The power supply system 85 supplies power to the electromagnet 55 by the contact of the first connector 81 and the second connector 51.

Further, a circuit board (not shown) is disposed in the accommodating chamber 52, and the electromagnet 55 is connected to the second connector 51 through the circuit board.

Furthermore, the locking structure is a blocking groove 11, and the end part of the stopping structure penetrates through the through hole 53 and extends into the pipe body 5 to be matched with the blocking groove 11, so that the spindle 1 is locked at the feeding and clamping position.

Preferably, as shown in fig. 3, 7 and 9, the housing of the handle 8 includes a transverse shell portion 82 extending in the proximal-distal direction and a longitudinal shell portion 83 extending in the up-down direction, the longitudinal shell portion 83 being located below the transverse shell portion 82, the longitudinal shell portion 83 being connected to a middle portion of the transverse shell portion 82 to form a T-shape; the distal end of the lateral shell portion 82 is formed with an insertion passage 84 opened toward the distal direction as a cartridge mounting place, and the proximal end of the tube body 5 is detachably inserted into the insertion passage 84.

Preferably, the power supply system 85 is fixedly installed in the inner cavity of the longitudinal shell portion 83, the linear motor 86 is fixedly installed in the inner cavity of the transverse shell portion 82, and the driving shaft 87 of the linear motor 86 is inserted into the insertion passage 84; the linear motor 86 is electrically connected with the power supply system 85, the driving shaft 87 is positioned at the near side of the main shaft 1, and the far end of the driving shaft 87 is in transmission connection with the near end of the main shaft 1. The linear motor 86 is used as a driving mechanism of the clamping bin assembly 9, can drive the main shaft 1 to do linear motion, and is simple in structure and small in size.

Of course, the use of the linear motor 86 as the drive mechanism for the cartridge assembly 9 is merely preferred, and it is contemplated that the drive mechanism for the cartridge assembly 9 may be a screw drive mechanism, a ratchet drive mechanism, or the like mounted within the interior of the transverse housing portion 82. It will be appreciated by those skilled in the art that both screw drive mechanisms and ratchet drive mechanisms are prior art and will not be described in detail herein.

Preferably, as shown in fig. 5, 8 and 10, the first connector 81 is provided on the proximal end wall of the insertion passage 84, and the second connector 51 is provided on the proximal end wall of the tube body 5. Specifically, in the present embodiment, the first connector 81 is a pin female connector, and the second connector 51 is a pin male connector. Of course, the present invention is not limited to this, and the first connector 81 and the second connector 51 may be other common electrical connection components.

Preferably, the support is located proximal to the first stop 54 when the spindle 1 is in the initial position. Therefore, the overlong design of the supporting part can be avoided, and the structure is ensured to be compact.

Preferably, as shown in fig. 6 and 11, in the present embodiment, the first stopper 54 includes a stopper portion 541 and a groove portion 542 recessed toward the electromagnet 55, which are connected in order in a direction inside the pipe body 5 toward the outside of the pipe body 5; the free end of the stop 541 projects through the through hole 53 into the tube 5, and the groove bottom 543 of the groove 542 is connected to the electromagnet 55 by the pre-compressed first elastic element 57. Thus, the groove bottom 543 provided with the groove portion 542 is connected with the electromagnet 55 through the pre-compressed first elastic member 57, and the groove wall 544 of the groove portion 542 can block the first elastic member 57 from large deflection, so as to ensure the connection stability between the first stop member 54 and the first elastic member 57; further, by providing the groove portion 542, the groove wall 544 of the groove portion 542 extends toward the electromagnet 55, and the distance between the groove portion 542 and the electromagnet 55 is shortened while the pre-compression amount of the first elastic member 57 is kept small, thereby facilitating the electromagnet 55 to attract the first stopper 54 after being energized.

Further preferably, in the present embodiment, the receiving cavity 52 is an elongated slot extending in the proximal-distal direction, and the recessed portion 542 has two opposite slot walls 544, and the two opposite slot walls 544 are arranged in sequence in the proximal-distal direction. In this way, the two opposite groove walls 544 limit the distance direction of the first elastic element 57, and since the accommodating cavity 52 is long, the left side wall and the right side wall of the accommodating cavity 52 limit the left-right direction of the first elastic element 57, and the groove walls 544 do not need to be arranged in the front-back direction and the left-right direction of the groove portion 542.

More preferably, a post 545 extending toward the electromagnet 55 is disposed at a center position of the groove bottom 543 of the groove portion 542, the first elastic member 57 is a spring, and the spring is fitted over the post 545 and connected to the groove bottom 543 of the groove portion 542. In this way, the stability of the connection between the first elastic member 57 and the first stopper 54 is further improved. It should be noted that, it is only preferable to use a spring as the first elastic member 57, and other first elastic members 57 such as rubber may be used.

Preferably, as shown in fig. 11, the free end of the stopper 541 has a proximal end wall which is an inclined wall 546 inclined proximally in a direction pointing out of the tube 5 inside the tube 5, and a distal end wall, the inclined wall 546 extending at least to be flush with the inner wall of the tube 5; the distal wall is a stopping wall 547, when the spindle 1 moves far to the delivering position, the free end of the stopping portion 541 extends into the stopping groove 11, and the stopping wall 547 is engaged with the distal wall of the stopping groove 11 to stop the spindle 1 from moving near.

In this way, by providing the proximal wall of the free end of the stopper 541 as the inclined wall 546, during the movement of the main shaft 1 from the initial position to the firing position, the distal end of the supporting portion first contacts the inclined wall 546, the supporting portion continues to move distally along the inclined wall 546, the inclined wall 546 is pressed to compress the first elastic member 57, and the free end of the stopper 541 gradually retracts into the through hole 53, allowing the main shaft 1 to continue to move distally without energizing the electromagnet 55. When the spindle 1 moves far to the clamping position, as shown in fig. 7 and 8, the blocking groove 11 corresponds to the position of the first stopping piece 54, the first elastic piece 57 extends, the free end of the first stopping piece 54 extends into the blocking groove 11, and the stopping wall 547 is matched with the far end wall of the blocking groove 11 to prevent the spindle 1 from moving near. The spindle 1 continues to move distally from the feeding position, the proximal wall of the blocking recess 11 contacts the inclined wall 546, the proximal wall of the blocking recess 11 continues to move distally along the inclined wall 546, the inclined wall 546 is pressed to compress the first elastic member 57, and the free end of the stopper 541 gradually retracts into the through hole 53, allowing the spindle 1 to continue to move distally to the firing position, as shown in fig. 9 and 10, without energizing the electromagnet 55. It can be seen that providing the proximal end wall of the free end of the stop 541 as a sloped wall 546 facilitates the first end of the first stop 54 allowing the main shaft 1 to move from the initial displacement to the firing position.

Further preferably, in the present embodiment, the stopper wall 547 is a vertical wall perpendicular to the main shaft 1. Further, in the present embodiment, the inclined wall 546 is directly connected to the stopper wall 547.

Further, as shown in fig. 13, in the present embodiment, both the proximal end wall and the distal end wall of the blocking groove 11 are vertical walls perpendicular to the main shaft 1. The thus-provided blocking groove 11 facilitates machining, and the distal end wall of the blocking groove 11 can be engaged with the stopper wall 547, preventing the spindle 1 from moving proximally, and the proximal end wall of the blocking groove 11 can move distally along the inclined wall 546.

Preferably, the main shaft 1 moves to more than two clip feeding positions which are arranged from near to far to realize the clip feeding of ligation clips with different models; the side part of the accommodating cavity 52 close to the inside of the tube body 5 is provided with more than two through holes 53 corresponding to the blocking grooves 11, and the through holes 53 correspond to the feeding and clamping positions one by one; the accommodating cavity 52 accommodates more than two first stoppers 54, and the first stoppers 54 are arranged in one-to-one correspondence with the through holes 53; when the spindle 1 is located at a certain feeding and clamping position, the blocking groove 11 is matched with the first stop piece 54 corresponding to the feeding and clamping position to block the spindle 1 from moving towards the proximal end of the tube body 5.

Specifically, as shown in fig. 5, 8, 10 and 12, in the magazine assembly 9 provided in the present embodiment, the main shaft 1 moves to 2 clip feeding positions arranged from near to far to implement feeding of two types of ligation clips, i.e., a large type and a small type, respectively. Namely, the 2 clip conveying positions which are arranged from near to far are respectively a first clip conveying position and a second clip conveying position, when the main shaft 1 moves to the first clip conveying position, the clip conveying of the large-size ligation clip is realized, and when the main shaft 1 moves to the second clip conveying position, the clip conveying of the small-size ligation clip is realized. Correspondingly, two through holes 53 are formed in the side portion, close to the inside of the tube body 5, of the accommodating cavity 52 corresponding to the blocking groove 11, two first stopping members 54 are accommodated in the accommodating cavity 52, the two through holes 53 are sequentially arranged from near to far and are respectively a first through hole and a second through hole, the two first stopping members 54 are respectively a first stopping member 54 and a second stopping member 54, the first through hole corresponds to the first feeding position, and the second through hole corresponds to the second feeding position; a first end of the first stop 54 extends into the tubular body 5 through the first through hole, a second end of the first stop 54 is connected to the electromagnet 55 through the pre-compressed first elastic member 57, a first end of the second first stop 54 extends into the tubular body 5 through the second through hole, and a second end of the second first stop 54 is connected to the electromagnet 55 through the pre-compressed second first elastic member 57; when the spindle 1 is located at a certain feeding and clamping position, the blocking groove 11 is matched with the first stop piece 54 corresponding to the feeding and clamping position to block the spindle 1 from moving towards the proximal end of the tube body 5.

Wherein the large ligation clip is used for clamping the diameter of a blood vessel of 5 to 7mm, and the small ligation clip is used for clamping the diameter of the blood vessel of 1 to 3 mm.

In order to improve the cooperation between the first stop member 54 and the blocking groove 11, it is preferable that, as shown in fig. 5, 8 and 10, the blocking groove 11 is respectively opened at least two opposite sides of the outer wall of the support portion; correspondingly, each blocking groove 11 of the tube body 5 is provided with an accommodating cavity 52 corresponding to each blocking groove 11, a through hole 53 corresponding to the feeding position is provided on the side part of each accommodating cavity 52 close to the inside of the tube body 5 corresponding to each blocking groove 11, and a first stop piece 54, an electromagnet 55 and a circuit board for supplying power to the electromagnet 55 are sequentially arranged in each accommodating cavity 52 from the inside of the tube body 5 to the outside of the tube body 5; the circuit board and the electromagnet 55 are fixed in the accommodating cavity 52, and the circuit board is electrically connected with the second connector 51; the first stop member 54 abuts against the side of the housing chamber 52 close to the inside of the tubular body 5, and a first end of the first stop member 54 protrudes through the through hole 53 into the tubular body 5, and a second end of the first stop member 54 is connected to the electromagnet 55 by a pre-compressed first elastic member 57.

Preferably, the main shaft 1 comprises an inner shaft 12 and an outer shaft 13 which are sleeved with each other, the outer shaft 13 is positioned at the proximal end of the inner shaft 12, and the inner shaft 12 is used for connecting with the feeding and clamping structure and the firing structure; the outer shaft 13 is connected with the inner shaft 12 in a far and near direction in an interlocking manner, and the inner shaft 12 is connected with the outer shaft 13 in a rotatable manner around the axis of the main shaft 1; the blocking groove 11 is provided on the outer shaft 13. In some of the cartridge modules 9, the function of rotating the jaws by rotating the main shaft 1 is provided to adjust the clamping angle of the jaws, in this embodiment, by providing the inner shaft 12 and the outer shaft 13 as above, the inner shaft 12 can move linearly in the proximal and distal directions and can rotate around the axis of the main shaft 1, which not only ensures the performance of delivering the clamps and firing, but also ensures the function of rotating the jaws by rotating the inner shaft 12, and at the same time, the rotation of the inner shaft 12 does not drive the rotation of the outer shaft 13, thereby ensuring the stable matching of the blocking groove 11 on the outer shaft 13 and the first stop 54.

Further preferably, as shown in fig. 5 and 13, a sliding block is disposed on an outer wall of the inner shaft 12, a sliding slot 14 extending circumferentially around the outer shaft 13 is formed on an inner wall of the outer shaft 13, the sliding block is inserted into the sliding slot 14, a proximal end wall of the sliding slot 14 contacts with the sliding block, a distal end wall of the sliding slot 14 contacts with the sliding block, and the sliding block can slide circumferentially around an axis of the inner shaft 12 along the sliding slot 14 on the outer shaft 13. In this way, the outer shaft 13 is connected to the inner shaft 12 in the proximal and distal directions in an interlocking manner, and the inner shaft 12 is connected to the outer shaft 13 in a rotatable manner about the axis of the main shaft 1.

Example 2

The present embodiment is mainly different from embodiment 1 in that:

as shown in fig. 14 to 16, the through hole 53 is a transverse taper hole, and a small end of the transverse taper hole is communicated with the inside of the pipe body 5; the stopping structure comprises a second stopping piece 58 and a locking bead 15, the second stopping piece 58 and the electromagnet 55 are sequentially arranged in the axial direction of the tube body 5, the accommodating cavity 52 is provided with a first side wall and a second side wall which are arranged in the far and near direction, the second stopping piece 58 is abutted against the first side wall, the second stopping piece 58 is connected with the first side wall through a pre-stretched second elastic piece 59, and a transverse accommodating cavity 550 is formed in the second stopping piece 58 corresponding to the position of the transverse conical hole; the locking bead 15 is located within the transverse bore, a first end of the locking bead 15 extends through the transverse bore into the tubular body 5, and a second end of the locking bead 15 contacts the second stop 58.

The electromagnet 55 is electrified, the adsorption second stop piece 58 moves towards the second side wall to the unlocking position, the transverse accommodating cavity 550 is communicated with the transverse taper hole, and the locking ball 15 can move into the transverse accommodating cavity 550, so that the locking ball 15 is contracted into the transverse taper hole.

Here, "lateral" refers to a direction perpendicular to the axis of the main shaft 1, i.e., a direction perpendicularly directed from the side wall of the main shaft 1 to the axis of the main shaft 1. It should be noted that the number of the locking beads related to the present invention may be one or more than two.

The stop arrangement thus provided, with the electromagnet 55 energized, retracts the locking bead 15 into the transverse bore, allowing the main shaft 1 to move from the initial position to the fired position, and allowing the main shaft 1 to move from the fired position to the initial position (as shown in figures 21 and 22). Second stopping member 58 when the main shaft 1 moves far to the clip sending position, the electromagnet 55 is powered off, the locking bead 15 is matched with the locking structure (as shown in fig. 17 to 20, the main shaft 1 is located at the clip sending position, and the electromagnet 55 is switched from power on to power off), the main shaft 1 is prevented from moving near, the main shaft 1 is locked when the main shaft 1 moves far to the clip sending position while the clip applier is not affected to carry out clip sending and triggering, the clip bin assembly 9 is pulled out when the clip applier finishes clip sending (namely, the main shaft 1 moves far to the clip sending position), the main shaft 1 is prevented from rebounding to the initial position from the clip sending position due to the restoring force of the restoring piece, and therefore when the clip bin assembly 9 is reused again to carry out clip sending, the driving shaft 87 in the handle 8 can drive the main shaft 1 to directly start working from the clip sending position, and clip sending failure caused by existing ligating clips in the jaws is avoided.

Preferably, the support is located proximal to the locking bead 15 when the spindle 1 is in the initial position. Therefore, the overlong design of the supporting part can be avoided, and the structure is ensured to be compact.

Preferably, as shown in fig. 15, 18, 20, 22 and 23, in the present embodiment, the second stopper 58 includes a bearing portion 548 and a projection 549 which are connected in sequence in the direction of the inside of the pipe body 5 toward the outside of the pipe body 5, and the projection 549 is provided at an end of the bearing portion 548 near the electromagnet 55; the second elastic element 59 is arranged on the side of the bearing part 548 far away from the interior of the tube body 5 and is positioned between the projection 549 and the first side wall, and the projection 549 is connected with the first side wall through the pre-stretched elastic element 59; when the electromagnet 55 is energized, the electromagnet 55 attracts the carrier 548 near the end wall of the electromagnet 55 and the protrusion 549 near the end wall of the electromagnet 55. In this way, the protrusion 549 is provided to provide a connection position of the second stopper 58 and the second elastic member 59 on the one hand, and to increase an adsorption area between the second stopper 58 and the electromagnet 55 on the other hand, so as to facilitate the electromagnet 55 to adsorb the second stopper 58 after being electrified.

Further, in the present embodiment, the receiving cavity 550 is a through hole opened on the bearing part 548, the through hole is closer to the first side wall of the receiving cavity 52 relative to the boss, and the through hole is located at one side of the boss. Therefore, the structure is simple, and the processing and the manufacturing are convenient.

Preferably, in the present embodiment, the electromagnet 55 and the second stopper 58 are arranged in the accommodating chamber 52 in the direction from the near side to the far side in sequence. By such arrangement, the distance between the electromagnet 55 and the handle 8 is shortened, which is beneficial to the electric connection between the electromagnet 55 and the power supply system 85 in the handle 8.

Preferably, the housing chamber 52 also houses a circuit board (not shown), the circuit board and the electromagnet 55 being located on the same side of the second stop member 58, and the circuit board and the electromagnet 55 being arranged in sequence in a direction from the outside of the tube body 5 to the inside of the tube body 5; the electromagnet 55 is electrically connected to the second connector 51 via the circuit board. With such an arrangement, the structure is compact, and the electric connection between the electromagnet 55 and the second connector 51 is facilitated.

Preferably, in the present embodiment, the housing chamber 52 is an annular housing chamber surrounding the inside of the tube body 5, the second stop 58 is an annular stop of the second stop 58 surrounding the inside of the tube body 5, and the electromagnet 55 is an annular electromagnet surrounding the inside of the tube body 5; at least two opposite sides of the side part of the annular accommodating cavity close to the inside of the tube body 5 are provided with transverse taper holes, and at least two opposite sides of the first side part of the second stop piece 58 are provided with pre-stretched second elastic pieces 59. Thus, the cooperation of the second stopper 58 with the stopper groove 11 is improved, and the work is more stable, and the locking is more stable.

Further preferably, in the present embodiment, the second elastic member 59 is disposed corresponding to the transverse taper hole.

Further preferably, in this embodiment, 3 horizontal taper holes have been evenly seted up along the annular trend on the lateral part that the annular holding chamber is close to body 5 inside.

Preferably, in the present embodiment, the second stopper 58 includes an annular bearing portion and an annular projection connected in series in the direction pointing outside the pipe body 5 inside the pipe body 5, the annular projection being provided at an end of the annular bearing portion near the electromagnet 55; the second elastic element 59 is arranged on the side of the annular bearing part far away from the inside of the tube body 5 and is positioned between the annular bulge and the first side wall of the accommodating cavity 52, and the second end of the second elastic element 59 is connected with the annular bulge; when the electromagnet 55 is energized, the electromagnet 55 attracts the end wall of the annular bearing portion close to the electromagnet 55 and the end wall of the annular projection close to the electromagnet 55.

In this embodiment, the second elastic member 59 is a spring. Of course, it is only preferable to use a spring as the second elastic member 59, and other second elastic members 59 such as rubber may be used.

The rest of the process is the same as that of embodiment 1, and the description thereof is omitted.

It should be understood that the above description of specific embodiments of the present invention is only for the purpose of illustrating the technical lines and features of the present invention, and is intended to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, but the present invention is not limited to the above specific embodiments. It is intended that all such changes and modifications as fall within the scope of the appended claims be embraced therein.

Claims (13)

1. A self-locking clip applier, which is characterized in that,

comprises a handle (8) and a clamping bin assembly (9); the clamping bin assembly (9) comprises a tube body (5) and a main shaft (1) with a near end inserted into the tube body (5) and used for pushing the clamping feeding structure and the firing structure to work, the tube body (5) is detachably connected with a clamping bin mounting position of the handle (8), and a driving mechanism in the handle (8) drives the main shaft (1) to move between an initial position, a clamping feeding position and a firing position, which are arranged from near to far;

a first connector (81) electrically connected with a power supply system (85) in the handle (8) is arranged on the clamping bin mounting position, a second connector (51) is arranged at the position of the pipe body (5) corresponding to the first connector (81), and when the pipe body (5) is connected to the clamping bin mounting position, the first connector (81) is contacted with the second connector (51);

an accommodating cavity (52) is formed in the pipe wall of the pipe body (5), a through hole (53) communicated with the inside of the pipe body (5) is formed in the side part, close to the inside of the pipe body (5), of the accommodating cavity (52), a stopping structure and an electromagnet (55) electrically connected with the second connector (51) are arranged in the accommodating cavity (52), the electromagnet (55) is electrified, and the adsorption stopping structure moves from a locking position to an unlocking position; the near end of the main shaft (1) is provided with a supporting part which is tightly attached to the inner wall of the tube body (5), and the outer wall of the supporting part is provided with a locking structure corresponding to the stopping structure;

when the stopping structure is located at the locking position, the end part of the stopping structure penetrates through the through hole (53) and extends into the pipe body (5) to be matched with the locking structure, so that the main shaft (1) is locked at the feeding position; when the stop structure is located at the unlocking position, the end part of the stop structure can retract into the through hole (53), and the main shaft (1) is allowed to move between the initial position and the firing position.

2. The self-lockable clip applier according to claim 1,

the stop structure comprises a first stop piece (54), the first stop piece (54) and an electromagnet (55) are sequentially arranged in a direction from the inside of the pipe body (5) to the outside of the pipe body (5), the first stop piece (54) is abutted against the side part of the accommodating cavity (52) close to the inside of the pipe body (5), the first end of the first stop piece (54) penetrates through the through hole (53) and extends into the pipe body (5), and the second end of the first stop piece (54) is connected with the electromagnet (55) through a pre-compressed first elastic piece (57);

the electromagnet (55) is electrified, the first stop piece (54) is adsorbed and moves towards the outside of the tube body (5) to the unlocking position, and the first end of the first stop piece (54) contracts into the through hole (53).

3. The self-lockable clip applier according to claim 2,

the first stop piece (54) comprises a stop part (541) and a groove part (542) with a notch facing the electromagnet (55), which are sequentially connected in the direction pointing to the outside of the pipe body (5) in the pipe body (5); the free end of the stop portion (541) extends into the tube (5) through the through hole (53), and the groove bottom (543) of the groove portion (542) is connected to the electromagnet (55) by means of the pre-compressed first elastic element (57).

4. The self-lockable clip applier according to claim 3,

the accommodating cavity (52) is long and extends along the far and near direction, and the groove part (542) is provided with two opposite groove walls (544) which are sequentially arranged along the far and near direction;

the two opposite groove walls (544) limit the distance direction of the first elastic piece (57), and the left side wall and the right side wall of the accommodating cavity (52) limit the left direction and the right direction of the first elastic piece (57).

5. The self-lockable clip applier according to claim 3,

an upright post (545) extending to the electromagnet (55) is arranged at the center of the groove bottom (543) of the groove portion (542), the first elastic piece (57) is a spring, and the spring is sleeved on the upright post (545) and connected with the groove bottom (543) of the groove portion (542).

6. The self-lockable clip applier according to claim 3,

the locking structure is a blocking groove (11);

the free end of the stop (541) has a proximal end wall and a distal end wall, the proximal end wall being an inclined wall (546) inclined proximally in a direction within the body directed out of the body, the inclined wall (546) extending at least to be flush with the inner wall of the body (5); the far end wall is a stopping wall (547), when the main shaft (1) moves far to the clamp sending position, the free end of the stopping part (541) extends into the stopping groove (11), and the stopping wall (547) is matched with the far end wall of the stopping groove (11) to stop the main shaft (1) from moving near.

7. The self-lockable clip applier according to claim 2,

the main shaft (1) moves to more than two clip feeding positions which are arranged from near to far to realize the clip feeding of ligation clips with different models;

the side part of the accommodating cavity (52) close to the interior of the tube body (5) is correspondingly provided with more than two through holes (53) in a locking structure, and the through holes (53) correspond to the feeding and clamping positions one by one; more than two first stop pieces (54) are accommodated in the accommodating cavity (52), and the first stop pieces (54) are arranged in one-to-one correspondence with the through holes (53); when the main shaft (1) is positioned at a certain feeding and clamping position, the locking structure is matched with a first stop piece (54) corresponding to the feeding and clamping position to stop the main shaft (1) from moving towards the near end of the pipe body (5).

8. The self-lockable clip applier according to claim 1,

the through hole (53) is a transverse taper hole, and the small end of the transverse taper hole is communicated with the inside of the pipe body (5);

the stopping structure comprises a second stopping piece (58) and a locking bead (15), the second stopping piece (58) and the electromagnet (55) are sequentially arranged in the axial direction of the tube body (5), the accommodating cavity (52) is provided with a first side wall and a second side wall which are arranged in the far-near direction, the second stopping piece (58) is abutted against the first side wall, the second stopping piece (58) is connected with the first side wall through a pre-stretched second elastic piece (59), and a transverse accommodating cavity (550) is formed in the position, corresponding to the transverse conical hole, of the second stopping piece (58); the locking bead (15) is positioned in the transverse taper hole, a first end of the locking bead (15) penetrates through the transverse taper hole to extend into the pipe body (5), and a second end of the locking bead (15) is in contact with the second stop piece (58);

the electromagnet (55) is electrified, the adsorption second stop piece (58) moves to the unlocking position towards the second side wall, the transverse accommodating cavity (550) is communicated with the transverse taper hole, and the locking ball (15) can move into the transverse accommodating cavity (550) to enable the locking ball (15) to shrink into the transverse taper hole.

9. The self-lockable clip applier according to claim 8,

the second stop piece (58) comprises a bearing part (548) and a projection (549) which are sequentially connected in the direction pointing to the outside of the tube body (5) in the tube body (5), and the projection (549) is arranged at one end of the bearing part (548) close to the electromagnet (55); the second elastic element (59) is arranged between the protrusion (549) and the first side wall, and the protrusion (549) is connected with the first side wall through the second elastic element (59) which is prestretched;

after the electromagnet (55) is electrified, the electromagnet (55) adsorbs the end wall of the bearing part (548) close to the electromagnet (55) and the end wall of the bulge (549) close to the electromagnet (55).

10. The self-lockable clip applier according to claim 8,

the accommodating cavity (52) is an annular accommodating cavity surrounding the inside of the pipe body (5), the second stop piece (58) is an annular stop piece surrounding the inside of the pipe body (5), and the electromagnet (55) is an annular electromagnet surrounding the inside of the pipe body (5);

horizontal taper holes are formed in at least two opposite sides of the side portion, close to the inside of the pipe body (5), of the annular accommodating cavity, and second elastic pieces (59) are arranged on at least two opposite sides of the stop piece.

11. The self-lockable clip applier according to claim 10,

3 transverse taper holes are uniformly formed in the side part, close to the inside of the pipe body, of the annular accommodating cavity along the annular direction.

12. The self-lockable clip applier according to claim 10,

the annular stop piece comprises an annular bearing part and an annular bulge which are sequentially connected in the direction pointing to the outside of the pipe body in the pipe body, and the annular bulge is arranged at one end of the annular bearing part close to the electromagnet (55);

the second elastic element (59) is arranged between the annular bulge and the first side wall, and the annular bulge is connected with the first side wall through the pre-stretched second elastic element (59);

after the electromagnet (55) is electrified, the electromagnet (55) adsorbs the end wall of the annular bearing part close to the electromagnet (55) and the end wall of the annular bulge close to the electromagnet (55).

13. The self-lockable clip applier according to claim 1,

the main shaft (1) comprises an inner shaft (12) and an outer shaft (13) which are sleeved with each other and used as a supporting part, the outer shaft (13) is positioned at the proximal end of the inner shaft (12), and the inner shaft (12) is used for being connected with the feeding and clamping structure and the firing structure;

the outer shaft (13) is connected with the inner shaft (12) in a linkage manner in the far and near directions, and the inner shaft (12) is rotatably connected with the outer shaft (13) around the axis of the main shaft (1); the locking structure is provided on the outer shaft (13).

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