A clip pocket structure and clip pocket assembly

Abstract

The first object of the present application is to provide a clip warehouse structure, comprising a first clip warehouse and a second clip warehouse for accommodating a plurality of ligature clips, and a first push clip piece and a second push clip piece; the feeding direction of the first clip warehouse is consistent with the feeding direction of the second clip warehouse, and the projections of the bottom plate of the first clip warehouse and the bottom plate of the second clip warehouse on the same plane coincide; the first push clip piece is inserted into the first clip warehouse to be able to push the ligature clip in the first clip warehouse to move to the distal end; the second push clip piece is inserted into the second clip warehouse to be able to push the ligature clip in the second clip warehouse to move to the distal end. Two ligature clips can be punched into the blood vessel at a time, and the operation efficiency is improved. The second object of the present application is to provide a clip warehouse assembly with the above-mentioned clip warehouse structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a clip cartridge structure and a clip cartridge assembly. BACKGROUND

[0002] In a surgical procedure, in order to fully expose the surgical field of view, it is necessary to ligate the blood vessels around the target tissue to stop bleeding. Hemostasis technology has become one of the core technologies of basic surgical operation techniques. Surgical operations on any part of the human body almost invariably involve bleeding and hemostasis, and generally use a clip applier to close the hemostatic clips.

[0003] In a surgical procedure, a surgeon uses a clip applier to ligate the blood vessels around the target tissue. In order to prevent blood from leaking after the blood vessels are cut, double ligature clips are needed to ligate the blood vessels left in the body after cutting. However, the clip appliers currently used are mostly single-ligature-clip continuous, and a second ligature clip is fired after a first ligature clip is fired, which can achieve double-ligature-clip ligation but is low in efficiency. SUMMARY

[0004] (I) Technical problems to be solved

[0005] In view of the problems in the above-mentioned technology, the present application at least solves them to some extent. Therefore, one object of the present application is to provide a clip cartridge structure that can fire two ligature clips at a time to shorten the operation time and improve the operation efficiency.

[0006] A second object of the present application is to provide a clip cartridge assembly having the above-mentioned clip cartridge structure.

[0007] (II) Technical solutions

[0008] In order to achieve the above-mentioned objects, the main technical solutions adopted by the present application include:

[0009] A first object of the present application is to provide a clip cartridge structure, comprising a first clip cartridge and a second clip cartridge for accommodating a plurality of ligature clips, and a first push-clip piece and a second push-clip piece; the feeding direction of the first clip cartridge is consistent with the feeding direction of the second clip cartridge, and the projections of the bottom plate of the first clip cartridge and the bottom plate of the second clip cartridge on the same plane coincide; the first push-clip piece is inserted into the first clip cartridge to be able to push the ligature clips in the first clip cartridge to move distally; the second push-clip piece is inserted into the second clip cartridge to be able to push the ligature clips in the second clip cartridge to move distally.

[0010] Optionally, the first push clip includes a first clip cartridge shaft connecting structure as its proximal end, the first clip cartridge shaft connecting structure includes a first bending portion and a first connecting portion connected in sequence from proximal to distal, the first connecting portion extends along the clip feeding direction, and the first bending portion bends laterally relative to the first connecting portion; the second push clip includes a second clip cartridge shaft connecting structure as its proximal end, the second clip cartridge shaft connecting structure includes a third bending portion and a second connecting portion connected in sequence from proximal to distal, the second connecting portion extends along the clip feeding direction, and the third bending portion bends laterally relative to the second connecting portion; the first bending portion, the first connecting portion, the third bending portion and the second connecting portion can be inserted and clamped in the clip cartridge shaft.

[0011] Optionally, the bending directions of the first bending portion and the third bending portion are opposite, and the two are connected together.

[0012] Optionally, the first push clip includes a first clip cartridge shaft connecting structure, a second bending portion, a first push clip portion and a first push clip head portion connected in sequence from proximal to distal, the second bending portion bends towards the bottom plate of the first clip cartridge relative to the first push clip portion, and the first push clip head portion is deflected towards the inside of the first clip cartridge relative to the first push clip portion; the second push clip includes a second clip cartridge shaft connecting structure, a fourth bending portion, a second push clip portion and a second push clip head portion connected in sequence from proximal to distal, the fourth bending portion bends towards the bottom plate of the second clip cartridge relative to the second push clip portion, and the second push clip head portion is deflected towards the inside of the second clip cartridge relative to the second push clip portion.

[0013] Optionally, the first push clip portion of the first push clip is inserted into the first clip cartridge, the second push clip portion of the second push clip is inserted into the second clip cartridge; at the proximal end of the first push clip portion, there is a first bending step away from the bottom plate of the first clip cartridge in the direction from distal to proximal, a first push clip support is slidingly arranged between the proximal end of the first push clip portion and the bottom plate of the first clip cartridge, and the first push clip support is at least partially located on the proximal side of the first bending step; and / or at the proximal end of the second push clip portion, there is a second bending step away from the bottom plate of the second clip cartridge in the direction from distal to proximal, a second push clip support is slidingly arranged between the proximal end of the second push clip portion and the bottom plate of the second clip cartridge, and the second push clip support is at least partially located on the proximal side of the second bending step.

[0014] Optionally, the bottom plate of the first clip cartridge is arranged opposite to the bottom plate of the second clip cartridge, and a connecting piece is connected between the bottom plate of the first clip cartridge and the bottom plate of the second clip cartridge.

[0015] Optionally, the bottom plate of the first clip cartridge is arranged opposite to the bottom plate of the second clip cartridge, and a connecting piece is connected between the first push clip and the second push clip.

[0016] Optionally, among the plurality of ligature clips contained in the first clip cartridge, adjacent ligature clips are separated by one first elastic stop; among the plurality of ligature clips contained in the second clip cartridge, adjacent ligature clips are separated by two first elastic stops.

[0017] A second object of the present application is to provide a clip cartridge assembly comprising a clip cartridge structure as described above and a clip cartridge shaft; the first pusher clip comprises a first clip cartridge shaft connecting structure as its proximal end, the second pusher clip comprises a second clip cartridge shaft connecting structure as its proximal end, and the clip cartridge shaft is connected with the first and second clip cartridge shaft connecting structures respectively; the clip cartridge shaft drives the first pusher clip to push the ligature clip in the first clip cartridge to move to the distal end, and synchronously drives the second pusher clip to push the ligature clip in the second clip cartridge to move to the distal end.

[0018] Optionally, the distal end of the clip cartridge shaft is internally provided with a containing cavity with an opening facing the distal side, a limiting block and a first reset member are fixedly installed at the distal end of the containing cavity; the first connecting part and the first bent part are inserted into the containing cavity, and the first bent part is clamped between the limiting block and the first reset member; the second connecting part and the third bent part are inserted into the containing cavity, and the third bent part is clamped between the limiting block and the first reset member; when the clip cartridge shaft is located at the initial position of the proximal end of the clip cartridge shaft, the first reset member provides a pre-tightening force between the proximal end of the containing cavity and the proximal end of the limiting block, and the distal end of the first reset member presses the first bent part and the third bent part on the proximal end of the limiting block.

[0019] Optionally, the clip cartridge assembly further comprises a fixed positioning pin, the first clip cartridge and the second clip cartridge are fixedly sleeved on the positioning pin, and the first pusher clip and the second pusher clip are sleeved on the positioning pin in a sliding manner along the proximal-distal direction.

[0020] (Three) beneficial effects

[0021] The beneficial effects of the present application are:

[0022] 1. The clip cartridge structure provided by the present application can pass through the existing puncture device to enter the human body, and can realize the one-time shooting of two ligature clips to the blood vessel, realize the double-ligature clip ligation of the blood vessel, shorten the operation time, and improve the operation efficiency.

[0023] 2. By arranging the connecting member between the first clip cartridge and the second clip cartridge, on the one hand, the first clip cartridge and the second clip cartridge can be supported to work stably, and on the other hand, the first clip cartridge and the second clip cartridge are connected as a whole, which is convenient for the fixation of the first clip cartridge and the second clip cartridge in the clip cartridge assembly.

[0024] 3. By slidingly arranging the pusher clip support between the proximal end of the pusher clip and the clip cartridge bottom plate, and arranging the pusher clip support part on the proximal side of the pusher clip bending step, on the one hand, the bending step is used as a blocking position to avoid the pusher clip support moving to the distal side of the bending step during the forward movement of the pusher clip, and on the other hand, the bending step is used as a pusher clip pushing position, in the process of the pusher clip retreating, the bending step contacts with the pusher clip support to drive the pusher clip support to move to the proximal end, which continuously supports the pusher clip while ensuring the stable continuous shooting of the clip applier. Attached Figure Description

[0025] The present invention is described with reference to the following figures:

[0026] Figure 1 This is a schematic diagram of the ligation clip used in a specific embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the clamp applicator according to Embodiment 1 of the present invention;

[0028] Figure 3 This is a cross-sectional view of the clamping assembly according to Embodiment 1 of the present invention;

[0029] Figure 4 yes Figure 3 Enlarged view of the middle compartment structure;

[0030] Figure 5 yes Figure 3 A partial enlarged view of the shaft of the middle clamping compartment;

[0031] Figure 6 This is a schematic diagram of the structure of the clamping chamber containing the ligation clip according to Embodiment 1 of the present invention;

[0032] Figure 7 This is a schematic diagram of the cooperation between the push clamp and the clamping chamber according to Embodiment 1 of the present invention.

[0033] [Explanation of Labels in the Attached Image]

[0034] 1: V-shaped ligation clip body;

[0035] 11: First clamping arm; 111: Locking hook;

[0036] 12: Second clamping arm; 121: Hook groove;

[0037] 21: First clamping post;

[0038] 22: Second clamping post;

[0039] 3: Adapter;

[0040] 4: Clamping assembly;

[0041] 5: Pipe body;

[0042] 51: Positioning pin;

[0043] 6: Clamping shaft;

[0044] 61: Receiving cavity; 611: Limiting block;

[0045] 62: First reset component;

[0046] 71: first clip bin; 711: clip to be inserted into a knot; 712: first elastic stop; 713: bottom plate of the first clip bin;

[0047] 72: second clip bin; 721: bottom plate of the second clip bin;

[0048] 73: first push clip piece; 731: first bending part; 732: first connecting part; 733: second bending part; 734: first push clip part; 735: first push clip head part; 736: second elastic stop; 737: first bending step;

[0049] 74: second push clip piece; 741: third bending part; 742: second connecting part; 743: fourth bending part; 744: second push clip part; 745: second push clip head part; 747: second bending step;

[0050] 75: connecting piece;

[0051] 76: first push clip piece support; 761: first pushing part; 762: first linkage part;

[0052] 77: second push clip piece support; 771: second pushing part; 772: second linkage part;

[0053] 81: firing shaft;

[0054] 82: second reset piece;

[0055] 83: clip bin shaft accommodating cavity;

[0056] 84: clip bin structure accommodating cavity;

[0057] 85: connecting channel;

[0058] 86: first blocking piece;

[0059] 87: second blocking piece;

[0060] 9: clip;

[0061] 91: first clip;

[0062] 92: second clip. DETAILED DESCRIPTION

[0063] In order to better explain the present application, so as to be understood, the following specific embodiments are combined with the drawings, and the present application is described in detail. In this paper, "near" refers to the side close to the operator, "far" refers to the side close to the patient. In this paper, "up", "down", "front", "back", "left", "right" and other orientation terms are referred to as the orientation of the figure, and the direction from near to far is also the direction from back to front. Figure 6 ​

[0064] To clearly illustrate the technical solution of the present invention, an exemplary ligation clip is used for explanation below. However, it should be understood that the clip applicator proposed in this invention should not be limited to the exemplary ligation clip described herein. Rather, these examples are provided to enable a clearer and more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0065] Commonly used ligation clips such as Figure 1 As shown, the ligation clip includes a V-shaped ligation clip body 1. The V-shaped ligation clip body 1 generally includes a first clamping arm 11 and a second clamping arm 12 connected together. One end of the two clamping arms is connected to form the closed tail of the ligation clip, and the other end is a free end. The free ends of the two clamping arms are far apart, forming a V-shape. Preferably, the V-shaped ligation clip body 1 is integrally formed from the first clamping arm 11 and the second clamping arm 12. The free end of the first clamping arm 11 is provided with an inwardly curved locking hook 111, and the free end of the second clamping arm 12 is provided with a hook groove 121 adapted to the locking hook. To facilitate the clamping of the ligation clip by the jaws of the clamp applicator, a first clamping post 21 is provided on the first clamping arm 11 near the locking hook 111 (i.e., near the free end). The height direction of the first clamping post 21 is perpendicular to the side plane of the V-shaped ligation clip body 1, and two first clamping posts 21 are symmetrically located on both sides of the first clamping arm 11. In this embodiment... Figure 1 In this embodiment, two first clamping posts 21 are connected, but they can also be disconnected. A second clamping post 22 is provided on the second clamping arm 12 near the hook groove 121 (i.e., near the free end). The height direction of the second clamping post 22 is perpendicular to the side plane of the V-shaped ligation clip body 1. Two second clamping posts 22 are symmetrically located on both sides of the second clamping arm 12. In this embodiment, the two second clamping posts 22 are disconnected, with the aforementioned hook groove 121 provided between them. Further, the first clamping arm 11 is an arc shape protruding outwards from the V-shaped ligation clip body 1, and the second clamping arm 12 is an arc shape protruding inwards from the V-shaped ligation clip body 1.

[0066] Example 1

[0067] like Figure 2 As shown, this embodiment provides a clamp applicator, which includes an adapter 3 and a clamping assembly 4.

[0068] like Figure 3As shown, the clip cartridge assembly 4 includes a tube 5, a clip cartridge shaft 6, a clip cartridge structure, a firing structure and a clip jaw 9 disposed at the distal end. The tube 5 includes a large head at the proximal end and a thin tube (for insertion into the human body) connected to the large head. The clip cartridge shaft 6 is located in the tube 5, and the proximal end of the clip cartridge shaft 6 is inserted into the large head of the tube 5. The clip cartridge shaft 6 can move between the proximal end initial position, the clip delivery completion position, the firing start position and the distal end terminal position of the clip cartridge shaft. The clip cartridge shaft 6 advances distally, and during the movement of the clip cartridge shaft 6 from the proximal end initial position to the clip delivery completion position, the clip cartridge shaft 6 drives the clip cartridge structure to push the ligature clip to move distally, and when the clip cartridge shaft 6 moves to the clip delivery completion position, the clip cartridge structure pushes the ligature clip into the clip jaw 9. The clip cartridge shaft 6 continues to move distally and no longer drives the clip cartridge structure to push the ligature clip. During the movement of the clip cartridge shaft 6 from the firing start position to the distal end terminal position of the clip cartridge shaft, the firing structure is driven to move distally, gradually closing the clip jaw 9, and when the clip cartridge shaft 6 moves to the distal end terminal position of the clip cartridge shaft, the firing structure completely closes the clip jaw 9. The clip cartridge shaft 6 retreats proximally, and during the movement of the clip cartridge shaft 6 from the distal end terminal position of the clip cartridge shaft to the firing start position, the firing structure gradually resets, and when the clip cartridge shaft 6 moves to the firing start position, the firing structure resets. The clip cartridge shaft 6 continues to move proximally, and during the movement of the clip cartridge shaft 6 from the clip delivery completion position to the proximal end initial position of the clip cartridge shaft, the clip cartridge structure gradually resets, and when the clip cartridge shaft 6 moves to the proximal end initial position of the clip cartridge shaft, the clip cartridge structure resets.

[0069] Preferably, the clip delivery completion position and the firing start position are the same position, that is, when the clip cartridge shaft 6 moves to the clip delivery completion position, it is also in the firing start position.

[0070] The adapter 3 includes an insertion channel and a drive shaft (not shown in the figure) disposed in the insertion channel. The proximal end of the tube 5 is inserted into the insertion channel, and the drive shaft is located proximally to the clip cartridge shaft 6, and the distal end of the drive shaft is connected to the proximal end of the clip cartridge shaft 6. The drive shaft drives the clip cartridge shaft 6 to move between the proximal end initial position, the clip delivery completion position, the firing start position and the distal end terminal position of the clip cartridge shaft. The drive shaft can be driven by a "screw nut" or a "gear and rack". The proximal end of the tube 5 can be fixedly inserted into the insertion channel or detachably inserted into the insertion channel.

[0071] Among them, as Figure 3 and Figure 4As shown, the clip cartridge structure includes a first clip cartridge 71, a second clip cartridge 72, a first push clip piece 73 and a second push clip piece 74. The first clip cartridge 71 and the second clip cartridge 72 are fixed in the tube body 5 for accommodating a plurality of ligation clips. The first push clip piece 73 is used to push the ligation clips in the first clip cartridge 71, and the second push clip piece 74 is used to push the ligation clips in the second clip cartridge 72. The sending direction of the first clip cartridge 71 is consistent with the sending direction of the second clip cartridge 72, both of which are from back to front. The bottom plate 713 of the first clip cartridge coincides in projection with the bottom plate 721 of the second clip cartridge in the same plane, and the bottom plate 713 of the first clip cartridge is arranged opposite to the bottom plate 721 of the second clip cartridge, that is, the first push clip piece 73 and the second push clip piece 74 are at least spaced apart by the bottom plate 713 of the first clip cartridge and the bottom plate 721 of the second clip cartridge, that is, the first push clip piece 73 is located on the same side of the bottom plate 713 of the first clip cartridge and the bottom plate 721 of the second clip cartridge, and the second push clip piece 74 is located on the other side of the bottom plate 713 of the first clip cartridge and the bottom plate 721 of the second clip cartridge.

[0072] Preferably, the first clip cartridge 71 is arranged adjacent to the second clip cartridge 72, so that the cross section of the clip cartridge structure can be reduced, and the volume of the clip cartridge assembly can be reduced.

[0073] The first push clip piece 73 is at least partially located on the top of the first clip cartridge 71 (the "top" is the part of the first clip cartridge 71 farthest from the bottom plate of the first clip cartridge 71) and above the bottom plate of the first clip cartridge 71, thereby forming the first push clip piece 73 inserted into the first clip cartridge 71. The clip cartridge shaft 6 abuts or connects with the first push clip piece 73 to drive the first push clip piece 73 to push the ligation clips in the first clip cartridge 71 to move distally.

[0074] The second push clip piece 74 is at least partially located on the top of the second clip cartridge 72 (the "top" is the part of the second clip cartridge 72 farthest from the bottom plate of the first clip cartridge 72) and above the bottom plate of the second clip cartridge 72, thereby forming the second push clip piece 74 inserted into the second clip cartridge 72. The clip cartridge shaft 6 abuts or connects with the second push clip piece 74 to drive the second push clip piece 74 to push the ligation clips in the second clip cartridge 72 to move distally.

[0075] The clip cartridge structure thus arranged can pass through the existing puncture device of the existing specification to enter the human body during actual surgery, and can realize the punching of two ligation clips into the blood vessel at one time, realize the double ligation of the ligation clip of the blood vessel, shorten the operation time and improve the operation efficiency.

[0076] Further, a first clip pliers 91 is installed at the distal end of the first clip cartridge 71, and a second clip pliers 92 is installed at the distal end of the second clip cartridge 72.

[0077] Specifically, as shown in FIG. 1, the first clip pliers 91 is arranged on the top of the first clip cartridge 71, and the second clip pliers 92 is arranged on the top of the second clip cartridge 72. Figure 6 and Figure 7As shown, the plurality of ligating clips contained in the first clip bin 71 includes a to-be-entered-clip ligating clip 711 (the ligating clip to be entered into the clip jaw) located at the farthest end of the first clip bin and the ligating clips stored in the first clip bin in the proximal side of the to-be-entered-clip ligating clip. The openings of the plurality of ligating clips are sequentially laid flat on the bottom plate 713 of the first clip bin in the direction of clip feeding, the first clip arms 11 of the ligating clips are in contact with the first side wall of the first clip bin 71, the second clip arms 12 of the ligating clips are in contact with the second side wall of the first clip bin 71, and a plurality of first elastic clamping positions 712 are arranged on the bottom plate 713 of the first clip bin at equal intervals and upwardly protrude in the direction of clip feeding. The first push-clip plate 73 includes a first push-clip portion 734 and a first push-clip head portion 735 connected in sequence from proximal to distal, the first push-clip head portion 735 is bent inwardly relative to the first push-clip portion 734, the first push-clip portion 734 is located at the top of the first clip bin 71 and above the bottom plate 713 of the first clip bin, and the first push-clip head portion 735 extends into the interior of the first clip bin 71 and is arranged close to the to-be-entered-clip ligating clip 711, a plurality of second elastic clamping positions 736 are arranged on the first push-clip portion 734 at equal intervals and protrude inwardly in the direction of clip feeding.

[0078] Before the clip feeder feeds the clips, the to-be-entered-clip ligating clip 711 is closer to the distal end of the first clip bin 71 relative to the first elastic clamping position 712 at the farthest end, the clip holding columns of the ligating clips other than the to-be-entered-clip ligating clip 711 are located between the adjacent two first elastic clamping positions 712, and the second elastic clamping position 712 is located between the clip holding columns of the adjacent ligating clips other than the to-be-entered-clip ligating clip 711. When the clip feeder feeds the clips, the first push-clip plate 73 advances to the distal end of the first clip bin 71, the protruding portions of the second elastic clamping positions 736 gradually abut against the first and / or second clip holding columns of all the ligating clips other than the to-be-entered-clip ligating clip 711, and the first push-clip head portion 735 abuts against the tail of the to-be-entered-clip ligating clip 711. As the first push-clip plate 73 continues to advance to the distal end of the first clip bin 71, it pushes all the ligating clips to advance to the distal end of the first clip bin 71 until the to-be-entered-clip ligating clip 711 enters the first clip jaw 91, and the first push-clip plate 73 stops advancing to the distal end of the first clip bin 71, during which all the ligating clips other than the to-be-entered-clip ligating clip 711 pass the distal adjacent first elastic clamping position 712. Then the first push-clip plate 73 advances to the proximal end of the first clip bin 71, the first push-clip head portion 735 and the second elastic clamping positions 736 push all the ligating clips other than the to-be-entered-clip ligating clip 711 to advance to the proximal end of the first clip bin 71, when all the ligating clips other than the to-be-entered-clip ligating clip 711 contact the first elastic clamping position 712, the first elastic clamping position 712 blocks all the ligating clips other than the to-be-entered-clip ligating clip 711 from continuing to advance to the proximal end of the first clip bin 71, and since the first push-clip head portion 735 is elastic, it passes the proximal adjacent ligating clip, and then the first push-clip plate 73 stops advancing to the proximal end of the first clip bin 71. The first push-clip plate 73 reciprocates in this way to feed the ligating clips to the first clip jaw 91 in sequence.

[0079] The structure of the second clamping chamber 72 and the second push clamping piece 74, and the working principle between the second clamping chamber 72 and the second push clamping piece 74, are similar to the above-mentioned first clamping chamber 71 and the first push clamping piece 73, and will not be described here.

[0080] Preferably, referring to Figure 4 , the clamping chamber structure further comprises a connecting piece 75. The connecting piece 75 is located between the first clamping chamber 71 and the second clamping chamber 72, that is, the bottom plate of the first clamping chamber 71 and the bottom plate of the second clamping chamber 72 are separated on both sides of the connecting piece 75, the first end of the connecting piece 75 is connected with the bottom plate of the first clamping chamber 71, and the second end of the connecting piece 75 is connected with the bottom plate of the second clamping chamber 72. In this way, the connecting piece 75 can support the first clamping chamber 71 and the second clamping chamber 72 on the one hand, so that the first clamping chamber 71 and the second clamping chamber 72 work stably, and on the other hand, the first clamping chamber 71 and the second clamping chamber 72 are connected as a whole, which is convenient for the fixation of the first clamping chamber 71 and the second clamping chamber 72 in the pipe body 5. In the embodiment, the connecting piece 75 is a long strip-shaped block extending in the clamping direction; conceivably, the connecting piece 75 can also be a plurality of blocks, which are arranged in sequence along the clamping direction. In the embodiment, the first end of the connecting piece 75 is welded with the bottom plate 713 of the first clamping chamber, and the second end of the connecting piece 75 is welded with the bottom plate 721 of the second clamping chamber; conceivably, the first end of the connecting piece 75 is bonded with the bottom plate 713 of the first clamping chamber, and the second end of the connecting piece 75 is bonded with the bottom plate 721 of the second clamping chamber, which can also achieve similar effects.

[0081] Optionally, the bottom plate of the first clamping chamber 71 and the bottom plate of the second clamping chamber 72 can also be directly connected (i.e. not connected through the connecting piece 75), which can also achieve similar effects. Specifically, the bottom plate of the first clamping chamber 71 and the bottom plate of the second clamping chamber 72 are directly bonded, or directly welded, or hot melt connected, etc.

[0082] In order to realize the synchronization of the driving of the first push clamping piece 73 and the second push clamping piece 74 by the clamping chamber shaft 6, the first push clamping piece 73 comprises a first clamping chamber shaft connecting structure as its proximal end, the second push clamping piece 74 comprises a second clamping chamber shaft connecting structure as its proximal end, and the first clamping chamber shaft connecting structure and the second clamping chamber shaft connecting structure simultaneously abut or connect with the clamping chamber shaft, preferably connect, to ensure the stability of the driving and the utilization of the clamping chamber shaft to pull back the two push clamping pieces to the reset position.

[0083] Specifically, the first push clip 73 comprises a first bending portion 731, a first connecting portion 732 and a second bending portion 733, which are arranged in sequence from proximal to distal and connected, wherein the first bending portion 731 and the first connecting portion 732 constitute a first clip cartridge shaft connecting structure. The first bending portion 731 is connected at the proximal end of the first connecting portion 732, the first connecting portion 732 extends along the clip feeding direction, and the first bending portion 731 bends laterally relative to the first connecting portion 732. In this embodiment, the first bending portion 731 bends towards (but not beyond) the second clip cartridge 72 relative to the first connecting portion 732, and forms a vertical, but not limited to a strict vertical.

[0084] The second push clip 74 comprises a third bending portion 741, a second connecting portion 742, a fourth bending portion 743, a second push clip portion 744 and a second push clip head portion 745 arranged in sequence from proximal to distal and connected, wherein the third bending portion 741 and the second connecting portion 742 constitute a second clip cartridge shaft connecting structure. The third bending portion 741 is connected at the proximal end of the second connecting portion 742, the second connecting portion 732 extends along the clip feeding direction, and the third bending portion 741 bends laterally relative to the second connecting portion. In this embodiment, the third bending portion 741 bends towards (but not beyond) the first clip cartridge 71 relative to the second connecting portion 742, and forms a vertical, but not limited to a strict vertical. Thus, in this embodiment, the bending directions of the first bending portion and the third bending portion are opposite, and the first bending portion 731 and the third bending portion 741 are connected together, for example, the first bending portion 731 and the third bending portion 741 are integrally formed.

[0085] In this embodiment, based on the introduction of the first clip cartridge shaft connecting structure and the second clip cartridge shaft connecting structure described above, the first clip cartridge shaft connecting structure and the second clip cartridge shaft connecting structure can be fixedly connected with the clip cartridge shaft in a plug-in manner. Specifically, the first bending portion 731, the first connecting portion 732, the third bending portion 741 and the second connecting portion 742 can be inserted and clamped in the clip cartridge shaft 6. The clip cartridge shaft 6 drives the first push clip 73 to push the ligature clip in the first clip cartridge 71 to move to the distal end by pushing the first bending portion 731, and resets the first push clip 73 to the proximal end by pulling the first bending portion 731. The clip cartridge shaft 6 drives the second push clip 74 to push the ligature clip in the second clip cartridge 72 to move to the distal end by pushing the third bending portion 741, and resets the second push clip 74 to the proximal end by pulling the third bending portion 741. Such arrangement is suitable for the cooperation of the clip cartridge structure proposed in the present application with the existing clip cartridge shaft.

[0086] Furthermore, in this embodiment, the proximal end of the first push clamp 734 is connected to the distal end of the first connecting part 732 through the second bending part 733. The first push clamp 734 extends substantially along the clamping direction, and the second bending part 733 bends relative to the first push clamp 734 toward (but not exceeding) the bottom plate of the first clamping compartment 71, forming a vertical orientation in this embodiment, but not limited to strict vertical orientation.

[0087] The proximal end of the second push clamp 744 is connected to the distal end of the second connecting part 742 via the fourth bending part 743. The fourth bending part 743 bends relative to the second push clamp 744 toward (but not exceeding) the bottom plate of the second clamping compartment 72, forming a vertical orientation in this embodiment, but is not limited to strict vertical orientation.

[0088] The main reason for the second and fourth bends is that the first and second connecting parts need to be very close to the clamping shaft to fit together. Furthermore, when the bottom plates of the first and second clamping chambers are adjacent, the first and second pushing clamps need to be a certain distance from their respective bottom plates. Therefore, the second and fourth bends are provided to increase this distance. Of course, in other embodiments, if the distance between the first and second connecting parts satisfies the distance requirements between the first and second pushing clamps and their respective bottom plates, the second and fourth bends can be omitted, and the first connecting part and the first pushing clamp can be directly connected, as can the second connecting part and the second pushing clamp.

[0089] Preferably, such as Figure 5 As shown, at the proximal end of the first push clamp portion 734, along the direction from far to near, there is a first bent step 737 away from the base plate 713 of the first clamping compartment; a first push clamp support member 76 is slidably disposed between the proximal end of the first push clamp portion 734 and the base plate 713 of the first clamping compartment, the first end of the first push clamp support member 76 contacts the first push clamp portion 734, the second end of the first push clamp support member 76 contacts the base plate 713 of the first clamping compartment, and the first push clamp support member 76 is at least partially located on the proximal side of the first bent step 737, thereby, the surface of the first push clamp support member 76 also forms a step that matches the first bent step 737.

[0090] At the proximal end of the second push clip portion 744, in the direction from distal to proximal, there is a second bending step 747 away from the bottom plate of the second clip chamber 72; between the proximal end of the second push clip portion 744 and the bottom plate of the second clip chamber 72, a second push clip support 77 is slidingly arranged, the first end of the second push clip support 77 is in contact with the second push clip portion 744, the second end of the second push clip support 77 is in contact with the bottom plate of the second clip chamber 72, and the second push clip support 77 is at least partially located proximal to the second bending step 747, so that the surface of the second push clip support 77 is also formed with a step matching the second bending step 747.

[0091] Because the push clip is thin and long, it is not easy to process for thin and long straight clips, and in actual processing, some bending steps often need to be punched to facilitate processing and production. Here, by arranging the push clip support part proximal to the bending step, on the one hand, the bending step is used as a blocking position to avoid the push clip support moving to the distal side of the bending step during the push clip advancing process, and on the other hand, the bending step is used as a push clip pushing position, during the push clip retracting process, the bending step contacts the push clip support to drive the push clip support to move proximally, while ensuring the stable continuous firing of the clip applier, the push clip is continuously supported.

[0092] Further preferably, in the present embodiment, the first push clip support 76 includes a first pushing portion 761 and a first linkage portion 762 from proximal to distal, the proximal end of the first pushing portion 761 is arranged next to the second bending portion 733, the distal end of the first pushing portion 761 is arranged next to the first bending step 737, and the distal end of the first linkage portion 762 is located distal to the first bending step 737; the second push clip support 77 includes a second pushing portion 771 and a second linkage portion 772 from proximal to distal, the proximal end of the second pushing portion 771 is arranged next to the fourth bending portion 743, the distal end of the second pushing portion 771 is arranged next to the second bending step 747, and the distal end of the second linkage portion 772 is located distal to the second bending step 747.

[0093] Among them, as Figure 3 and Figure 5As shown, the distal end of the clamping bin shaft 6 is internally provided with a containing cavity 61 which is open towards the distal side, a limiting block 611 is fixedly installed at the distal end of the containing cavity 61, and the limiting block 611 is located at the middle of the containing cavity 61 in the up-down direction; the proximal end of the first connecting part 732 is inserted into the containing cavity 61, and the first bending part 731 is arranged next to the proximal end of the limiting block 611; the proximal end of the second connecting part 742 is inserted into the containing cavity 61, and the third bending part 741 is arranged next to the proximal end of the limiting block 611; the containing cavity 61 also contains a first reset member 62, and the first reset member 62 is arranged between the proximal end of the containing cavity 61 and the proximal end of the limiting block 611. When the clamping bin shaft 6 is located at the initial position of the proximal end of the clamping bin shaft, the first reset member 62 provides a pre-tightening force between the proximal end of the containing cavity 61 and the proximal end of the limiting block 611, and the distal end of the first reset member 62 presses the first bending part 731 and the third bending part 741 against the proximal end of the limiting block 611. In this way, when the clamping bin shaft 6 moves from the initial position of the proximal end of the clamping bin shaft to the distal end, the first reset member 62 will drive the first pushing clamping piece 73 and the second pushing clamping piece 74 to move to the distal end due to the pre-tightening force provided by the first reset member 62 between the proximal end of the containing cavity 61 and the proximal end of the limiting block 611, so as to achieve the feeding of the clamps.

[0094] Further, the clip cartridge assembly further comprises a positioning pin 51 fixed in the big end of the tube body, and the axial direction of the positioning pin 51 is perpendicular to the far-near direction. The first clip cartridge 71 and the second clip cartridge 72 are fixedly sleeved (not movable in the far-near direction) on the positioning pin 51, and the first push clip 73 and the second push clip 74 are slidably sleeved on the positioning pin 51 in the far-near direction. Specifically, the first clip cartridge 71 is provided with a first mounting hole at the proximal end thereof, which is matched with the positioning pin 51, and the first connecting portion 732 is provided with a first sliding hole (the length direction of the first sliding hole is the far-near direction) in the shape of a long strip. The second clip cartridge 72 is provided with a second mounting hole at the proximal end thereof, which is matched with the positioning pin 51, and the second connecting portion 742 is provided with a second sliding hole (the length direction of the second sliding hole is the far-near direction) in the shape of a long strip. The positioning pin 51 penetrates through the first mounting hole, the first sliding hole, the second mounting hole and the second sliding hole. The first push clip 73 and the second push clip 74 are capable of sliding relative to the positioning pin 51. In this way, the positioning pin 51 limits the movement of the first clip cartridge 71 and the second clip cartridge 72 in the clip feeding direction (i.e., the length direction of the clip cartridge), and limits the movement of the first push clip 73 and the second push clip 74. When the clip cartridge shaft 6 is located at the initial position of the proximal end of the clip cartridge shaft, the positioning pin 51 is close to the distal end of the first sliding hole, and the positioning pin 51 is close to the distal end of the second sliding hole. When the clip cartridge shaft 6 moves to the completed clip feeding position, the proximal end of the first sliding hole abuts against the positioning pin 51, and the proximal end of the second sliding hole abuts against the positioning pin 51, thereby preventing the first push clip 73 and the second push clip 74 from continuing to move to the distal end. The clip cartridge shaft 6 continues to move to the distal end, the first return member 62 stores the force, and the limiting block 611 is separated from the first bent portion 731 and the third bent portion 741. The above-mentioned stored force can be a deformation force generated by compression or a deformation force generated by stretching. The first return member 62 can be a tension spring, a compression spring, a rubber member or the like.

[0095] wherein, as Figure 3As shown, the firing structure comprises a firing shaft 81 and a second reset member 82. The proximal end of the firing shaft 81 is inserted into the tube body 5, the proximal end of the firing shaft 81 is internally provided with a cartridge shaft accommodating cavity 83 which is open towards the proximal side, the distal end of the cartridge shaft 6 is inserted into the cartridge shaft accommodating cavity 83, the distal end of the firing shaft 81 is provided with a cartridge structure accommodating cavity 84 which is open towards the distal side, the proximal end of the first cartridge 71 is inserted into the cartridge structure accommodating cavity 84, the proximal end of the second cartridge 72 is inserted into the cartridge structure accommodating cavity 84, a connecting channel 85 is further formed in the firing shaft 81, the cartridge structure accommodating cavity 84 is in communication with the cartridge shaft accommodating cavity 83 through the connecting channel 85, and the first connecting portion 732 and the second connecting portion 742 pass through the connecting channel 85. A long strip-shaped third sliding hole is formed in the firing shaft 81, and the positioning pin 51 penetrates through the third sliding hole. The second reset member 82 is arranged between the firing shaft 81 and the tube body 5. The cartridge shaft accommodating cavity 83 is provided with a first blocking member 86 which extends from the cavity wall into the cavity. When the cartridge shaft 6 moves to the firing start position, the distal end of the cartridge shaft 6 abuts against the first blocking member 86, the cartridge shaft 6 and the firing shaft 81 are linked during the movement from the firing start position to the distal end termination position of the cartridge shaft, and the second reset member 82 stores energy; during the movement of the cartridge shaft 6 from the distal end termination position of the cartridge shaft to the firing start position, the second reset member 82 drives the cartridge shaft to reset. In this embodiment, the firing shaft 81 is provided with a second blocking member 87 which extends from the cartridge shaft 6 to the tube body 5, and the second reset member 82 is arranged between the second blocking member 87 and the tube body 5. The energy storage can be a deformation force generated by compression or a deformation force generated by stretching. The second reset member 82 can be a tension spring, a compression spring, a rubber member or the like.

[0096] Embodiment 2

[0097] The main difference between this embodiment and embodiment 1 is that:

[0098] The second bending portion and the fourth bending portion are cancelled, the first connecting portion and the first push-clamping portion are directly connected without forming a bending, the second connecting portion and the second push-clamping portion are directly connected without forming a bending, and the remaining same parts of embodiment 1 are not described herein again.

[0099] Embodiment 3

[0100] The main difference between this embodiment and embodiment 1 is that:

[0101] The bottom plate of the first cartridge 71 is arranged opposite to the bottom plate of the second cartridge 72, that is, the bottom plate of the first cartridge 71 and the bottom plate of the second cartridge 72 are at least spaced apart by the first push-clamping piece 73 and the second push-clamping piece 74.

[0102] Preferably, the connecting piece 75 is located between the first push clip 73 and the second push clip 74, the first end of the connecting piece 75 is connected with the first push clip 73, and the second end of the connecting piece 75 is connected with the second push clip 74. The second bending part and the fourth bending part are cancelled. The first connecting part and the first push clip part are directly connected without forming a bending; the second connecting part and the second push clip part are directly connected without forming a bending.

[0103] In the embodiment, the connecting piece 75 is a long strip-shaped block extending in the feeding direction; conceivably, the connecting piece 75 can also be a plurality of blocks arranged in sequence in the feeding direction. In the embodiment, the first end of the connecting piece 75 is welded with the first push clip, and the second end of the connecting piece 75 is welded with the second push clip; conceivably, the first end of the connecting piece 75 is bonded with the first push clip, and the second end of the connecting piece 75 is bonded with the second push clip, which can also achieve similar effects.

[0104] Preferably, the proximal end of the first clip bin has a first mounting part and a fifth bending part from proximal to distal, the first end of the fifth bending part is connected with the bottom plate of the first clip bin 71, the fifth bending part is bent towards (but not more than) the first push clip 73, the second end of the fifth bending part is connected with the first mounting part, and the first mounting part is arranged in the feeding direction; the proximal end of the second clip bin has a second mounting part and a sixth bending part from proximal to distal, the first end of the sixth bending part is connected with the bottom plate of the second clip bin 72, the sixth bending part is bent towards (but not more than) the second push clip 74, the second end of the sixth bending part is connected with the second mounting part, and the second mounting part is arranged in the feeding direction.

[0105] Correspondingly, the first mounting hole is arranged on the first mounting part, and the second mounting hole is arranged on the second mounting part. Of course, the structure of the above-mentioned first clip bin 71 and the second clip bin 72 is only preferred. Conceivably, the first mounting hole matched with the positioning pin 51 is directly arranged on the bottom plate of the first clip bin 71, the second mounting hole matched with the positioning pin 51 is directly arranged on the bottom plate of the second clip bin 72, and the positioning pin 51 penetrates the first mounting hole and the second mounting hole, which can also achieve the fixation of the first clip bin 71 and the second clip bin 72 in the proximal-distal direction.

[0106] The remaining same parts as in Embodiment 1 are not repeated.

[0107] Embodiment 4

[0108] The main difference between the present embodiment and Embodiment 1 is that:

[0109] The first clip bin 71 and the second clip bin 72 are stacked in the same direction side by side, that is, at least one of the first push clip 73 or the second push clip 74 is spaced between the bottom plate of the first clip bin 71 and the bottom plate of the second clip bin 72, that is, only one of the first push clip 73 and the second push clip 74 is spaced.

[0110] Since there is no adjacent clip bin bottom plate and adjacent push clip in the present embodiment, there is no connecting piece 75 in the present embodiment.

[0111] Correspondingly, the fourth bending part is cancelled, and the second connecting part is directly connected with the second push clip part. Without being limited thereto, it can be conceived that the first push clip 73 and the second push clip 74 are the same in structure, and the positions of other structures are changed, and similar effects can also be achieved.

[0112] The remaining same as in Embodiment 1 will not be repeated.

[0113] Embodiment 5

[0114] It should be noted that when a user uses the clip applier to ligate the blood vessels around the target tissue, three ligating clips will usually be fired on the blood vessels to be ligated, which are a first ligating clip, a second ligating clip and a third ligating clip. Among them, the second ligating clip is located between the first ligating clip and the third ligating clip, and the second ligating clip is closer to the third ligating clip than the first ligating clip. Generally, the blood vessels between the first ligating clip and the second ligating clip are cut to leave the blood vessels ligated by the double ligating clips (i.e. the second ligating clip and the third ligating clip) in the body.

[0115] The main difference between the present embodiment and Embodiment 1 is that:

[0116] Among the plurality of ligating clips contained in the first clip bin 71, there is a first elastic stop 712 between adjacent ligating clips; among the plurality of ligating clips contained in the second clip bin 72, there are two first elastic stops 712 between adjacent ligating clips.

[0117] The clip applier thus arranged can alternately fire two ligating clips and one ligating clip at a time in use, which conforms to the habit of the user using the clip applier to ligate the blood vessels around the target tissue, and at the same time, the surgical efficiency is high.

[0118] Finally, it should be noted that the clip bin structure of the present embodiment can also include a third clip bin and a third push clip for pushing the ligating clips in the third clip bin. The structure and cooperation relationship of the third push clip and the third clip bin are similar to those of the first push clip and the first clip bin and the second push clip and the second clip bin, which will not be repeated here.

[0119] It should be understood that the description of the specific embodiments of the present application is only for the purpose of illustrating the technical route and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, but the present application is not limited to the above specific embodiments. Any changes or modifications made within the scope of the claims of the present application shall be covered within the protection scope of the present application.

Claims

1. A clip storage structure characterized in that, comprising a first clip storage (71) and a second clip storage (72) for accommodating a plurality of ligature clips, and a first push clip piece (73) and a second push clip piece (74); the feeding direction of the first clip storage (71) is consistent with the feeding direction of the second clip storage (72), and the bottom plate (713) of the first clip storage and the bottom plate (721) of the second clip storage coincide in the projection of the same plane; the first push clip piece (73) is inserted into the first clip storage (71) to be able to push the ligature clip in the first clip storage (71) to move distally; the second push clip piece (74) is inserted into the second clip storage (72) to be able to push the ligature clip in the second clip storage (72) to move distally; the first push clip piece (73) comprises a first clip storage shaft connecting structure, a second bending part (733) and a first push clip part (734) connected in sequence from proximal to distal, the second bending part (733) is bent towards the bottom plate (713) of the first clip storage relative to the first push clip part (734); the second push clip piece (74) comprises a second clip storage shaft connecting structure, a fourth bending part (743) and a second push clip part (744) connected in sequence from proximal to distal, the fourth bending part (743) is bent towards the bottom plate (721) of the second clip storage relative to the second push clip part (744); the first push clip part (734) is inserted into the first clip storage (71), and the second push clip part (744) is inserted into the second clip storage (72); at the proximal end of the first push clip part (734), along the direction from distal to proximal, there is a first bending step (737) away from the bottom plate (713) of the first clip storage, a first push clip piece support (76) is slidably arranged between the proximal end of the first push clip part (734) and the bottom plate (713) of the first clip storage, the first end of the first push clip piece support (76) is in contact with the first push clip part (734), the second end of the first push clip piece support (76) is in contact with the bottom plate (713) of the first clip storage, the first push clip piece support (76) is at least partially located on the proximal side of the first bending step (737), and the surface of the first push clip piece support (76) is formed with a step matching the first bending step (737); and / or, at the proximal end of the second push clip part (744), along the direction from distal to proximal, there is a second bending step (747) away from the bottom plate (721) of the second clip storage, a second push clip piece support (77) is slidably arranged between the proximal end of the second push clip part (744) and the bottom plate (721) of the second clip storage, the first end of the second push clip piece support (77) is in contact with the second push clip part (744), the second end of the second push clip piece support (77) is in contact with the bottom plate (721) of the second clip storage, the second push clip piece support (77) is at least partially located on the proximal side of the second bending step (747), and the surface of the second push clip piece support (77) is formed with a step matching the second bending step (747). The first and second clip cartridge shaft connecting structures are adapted to be connected with the same clip cartridge shaft.

2. The clip cartridge structure according to claim 1, characterized in that, The first clip cartridge shaft connecting structure comprises a first bending portion (731) and a first connecting portion (732) connected in sequence from proximal to distal, the first connecting portion (732) extends along the clip feeding direction, and the first bending portion (731) bends laterally relative to the first connecting portion (732); The second clip cartridge shaft connecting structure comprises a third bending portion (741) and a second connecting portion (742) connected in sequence from proximal to distal, the second connecting portion (742) extends along the clip feeding direction, and the third bending portion (741) bends laterally relative to the second connecting portion (742); The first bending portion (731), the first connecting portion (732), the third bending portion (741) and the second connecting portion (742) can be inserted and clamped in the clip cartridge shaft.

3. The pocket structure of claim 2, wherein, The bending directions of the first bending portion (731) and the third bending portion (741) are opposite, and the two are connected together.

4. The clip cartridge structure according to claim 1, characterized in that, The first push clip (73) further comprises a first push clip head portion (735), the first push clip portion (734) and the first push clip head portion (735) are connected in sequence from proximal to distal, and the first push clip head portion (735) is deflected inward of the first clip cartridge (71) relative to the first push clip portion (734); The second push clip (74) further comprises a second push clip head portion (745), the second push clip portion (744) and the second push clip head portion (745) are connected in sequence from proximal to distal, and the second push clip head portion (745) is deflected inward of the second clip cartridge (72) relative to the second push clip portion (744).

5. The clip cartridge structure according to claim 1, characterized in that, The bottom plate (713) of the first clip cartridge is arranged opposite to the bottom plate (721) of the second clip cartridge, and a connecting piece (75) is connected between the bottom plate (713) of the first clip cartridge and the bottom plate (721) of the second clip cartridge.

6. The clip cartridge structure according to claim 1, characterized in that, Among the plurality of ligature clips contained in the first clip cartridge (71), adjacent ligature clips are separated by one first elastic stop (712); among the plurality of ligature clips contained in the second clip cartridge (72), adjacent ligature clips are separated by two first elastic stops (712).

7. A clip cartridge assembly, characterized in that, It comprises the clip cartridge structure according to any one of claims 1 to 6 and a clip cartridge shaft (6); The first push clip (73) comprises a first clip cartridge shaft connecting structure as its proximal end, the second push clip (74) comprises a second clip cartridge shaft connecting structure as its proximal end, and the clip cartridge shaft (6) is connected with the first and second clip cartridge shaft connecting structures respectively; The clip cartridge shaft (6) drives the first push clip (73) to push the ligature clip in the first clip cartridge (71) to move distally, and synchronously drives the second push clip (74) to push the ligature clip in the second clip cartridge (72) to move distally.

8. The clip cartridge assembly according to claim 7, characterized in that, The first clip cartridge shaft connecting structure comprises a first bending portion (731) and a first connecting portion (732) connected in sequence from proximal to distal, the first connecting portion (732) extends along the clip feeding direction, and the first bending portion (731) bends laterally relative to the first connecting portion (732); the second clip cartridge shaft connecting structure comprises a third bending portion (741) and a second connecting portion (742) connected in sequence from proximal to distal, the second connecting portion (742) extends along the clip feeding direction, and the third bending portion (741) bends laterally relative to the second connecting portion (742); The distal end of the clip cartridge shaft (6) is internally provided with a containing cavity (61) with an opening facing distally, and a limiting block (611) and a first reset member (62) are fixedly installed at the distal end of the containing cavity (61); The first connecting portion (732) and the first bending portion (731) are inserted into the containing cavity (61), and the first bending portion (731) is clamped between the limiting block (611) and the first reset member (62); the second connecting portion (742) and the third bending portion (741) are inserted into the containing cavity (61), and the third bending portion (741) is clamped between the limiting block (611) and the first reset member (62); When the clip cartridge shaft (6) is located at the proximal end initial position of the clip cartridge shaft, the first reset member (62) provides a pre-tightening force between the proximal end of the containing cavity (61) and the proximal end of the limiting block (611), and the distal end of the first reset member (62) presses the first bending portion (731) and the third bending portion (741) on the proximal end of the limiting block (611).

9. The clip cartridge assembly according to claim 7 or 8, characterized in that, Further comprising a fixed positioning pin (51), the first clip cartridge (71) and the second clip cartridge (72) are fixedly sleeved on the positioning pin (51), and the first push clip (73) and the second push clip (74) are slidably sleeved on the positioning pin (51) in the proximal-distal direction.

Images