A clip cartridge assembly, a clip applier, and a clip feed structure driving method of a clip applier

Abstract

The application provides a clamp bin assembly, which comprises a fixed sleeve and a telescopic sleeve arranged in sequence from proximal to distal, the distal end of the fixed sleeve is in sliding connection with the proximal end of the telescopic sleeve, the telescopic sleeve can slide to a terminal position of the telescopic sleeve in the distal direction; a clamp bin structure and a clamp are inserted into the telescopic sleeve and are in linkage with the telescopic sleeve in the proximal-distal direction; the distal end of a clamp feeding structure is inserted into the fixed sleeve and the telescopic sleeve, and the clamp feeding structure can move between a proximal initial position, a clamp feeding position and a distal terminal position arranged in sequence from proximal to distal; the telescopic sleeve is provided with a linkage member, the proximal side and the distal side of the linkage member are respectively provided with a first reset member and a second reset member, and the first reset member and the second reset member are both located between the clamp feeding structure and the linkage member; when the clamp feeding structure is located at the proximal initial position, the first reset member and the second reset member both provide a pre-tightening force between the clamp feeding structure and the linkage member. The clamp can be automatically retracted.

Description

TECHNICAL FIELD

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

[0002] In a surgical procedure, in order to fully expose the surgical field of view, the blood vessels around the target tissue need to be ligated 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 a clip applier is generally used to close the ligating clip for hemostasis.

[0003] During a surgical procedure, a doctor uses a clip applier to ligate the blood vessels around the target tissue. After the clip applier fires the clip, the clip jaws need to be retracted to be removed from the blood vessels. Currently, doctors often manually retract the clip applier to achieve the retraction of the clip jaws. However, during the manual retraction of the clip jaws, the operation is prone to shaking, and the clip jaws are easily pulled by the ligating clip, which may cause the risk of tissue damage. SUMMARY

[0004] (I) Technical problems to be solved

[0005] In view of the above technical problems, the present application at least solves them to some extent. Therefore, one object of the present application is to provide a clip cartridge assembly capable of automatically retracting the clip jaws.

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

[0007] A third object of the present application is to provide a method for driving a clip feeding structure of the above-mentioned clip applier.

[0008] (II) Technical solutions

[0009] In order to achieve the above-mentioned objects, the main technical solutions adopted by the present application include:

[0010] The first object of the present application is to provide a clip cartridge assembly, comprising clip jaws, a clip cartridge structure, a clip feeding structure, and a fixed sleeve and an extension sleeve arranged in order from proximal to distal; the distal end of the fixed sleeve is slidably connected to the proximal end of the extension sleeve, and the extension sleeve can slide distally to a terminal position of the extension sleeve; the clip cartridge structure and the clip jaws are both inserted into the extension sleeve and are linked in the proximal-distal direction with the extension sleeve; the clip feeding structure is inserted into the fixed sleeve and the extension sleeve, and can move between a proximal initial position, a clip feeding position and a distal terminal position arranged in order from proximal to distal;

[0011] The telescopic sleeve has a linkage, a first reset member and a second reset member are arranged at the proximal side and the distal side of the linkage respectively, and the first reset member and the second reset member are both located between the linkage and the clamping structure; when the clamping structure is located at the proximal initial position, the first reset member and the second reset member both provide a pre-tightening force between the clamping structure and the linkage, and the telescopic sleeve is located at the telescopic sleeve initial position; when the clamping structure moves from the proximal initial position to the clamping position, the telescopic sleeve is pushed from the telescopic sleeve initial position to the telescopic sleeve terminal position by the first reset member and the second reset member.

[0012] Optionally, the distal end of the fixed sleeve and the proximal end of the telescopic sleeve are mutually sleeved, a first blocking member is arranged on the fixed sleeve, and a second blocking member is arranged on the telescopic sleeve; when the telescopic sleeve is located at the telescopic sleeve initial position and at a position between the telescopic sleeve initial position and the telescopic sleeve terminal position, the first blocking member and the second blocking member are separated; when the telescopic sleeve is located at the telescopic sleeve terminal position, the first blocking member and the second blocking member are in contact.

[0013] Optionally, the first blocking member is located at the distal end of the fixed sleeve, and the second blocking member is located at the proximal end of the telescopic sleeve.

[0014] Optionally, the first blocking member extends from the inner wall of the fixed sleeve to the inside of the fixed sleeve, and the second blocking member extends from the outer wall of the telescopic sleeve to the outside of the telescopic sleeve, and the second blocking member is located at the proximal end of the telescopic sleeve; the linkage is arranged at the proximal end of the telescopic sleeve, and the proximal end of the linkage is flush with the proximal end of the second blocking member.

[0015] Optionally, the linkage is distributed around the circumference of the telescopic sleeve; the first reset member is annular, and the first reset member is distributed around the circumference of the telescopic sleeve; the second reset member is annular, and the second reset member is distributed around the circumference of the telescopic sleeve.

[0016] Optionally, the clamping structure includes a clamping chamber, and the clamping structure includes a clamping piece; the clamping chamber is arranged close to the middle of the telescopic sleeve in the up-down direction, and the clamping side of the clamping chamber faces the upper part of the telescopic sleeve; the distal end of the clamping piece is located above the clamping chamber; the distal end of the clamping piece has an upward filling part, the top end of the filling part is provided with a first accommodating groove extending in the proximal-distal direction, the linkage extends into the first accommodating groove, the first reset member is located between the proximal end of the first accommodating groove and the linkage, and the second reset member is located between the distal end of the first accommodating groove and the linkage.

[0017] Optionally, the clip cartridge structure comprises a clip cartridge, and the clip feeding structure comprises a push clip; the clip cartridge is arranged close to the middle part of the telescopic sleeve in the up-down direction, and the clip feeding side of the clip cartridge faces the upper part of the telescopic sleeve; the distal end of the push clip is located above the clip cartridge; the clip cartridge assembly further comprises an inner liner fixed to the bottom of the telescopic sleeve; the bottom end of the inner liner is provided with a second accommodating groove extending in the proximal-distal direction, the linkage member extends into the second accommodating groove, the first reset member is located between the proximal end of the second accommodating groove and the linkage member, and the second reset member is located between the distal end of the second accommodating groove and the linkage member.

[0018] Optionally, the clip cartridge assembly further comprises a firing structure inserted into the telescopic sleeve; the firing structure comprises a first firing piece and a second firing piece, the first firing piece is located proximally to the second firing piece, the proximal end of the first firing piece is connected with the transmission structure, and the distal end of the second firing piece is used for closing the clip jaw; during the movement of the first firing piece to the distal end, the distal end of the first firing piece can be connected with the proximal end of the second firing piece to drive the second firing piece to move to the distal end; the second firing piece can move relative to the telescopic sleeve between a firing initial position and a firing terminal position; when the second firing piece is located at the firing initial position, the telescopic sleeve can drive the second firing piece to move to the distal end; during the movement of the telescopic sleeve to the distal end, the second firing piece can be located at the firing initial position.

[0019] The second object of the present application is to provide a clip applier having the clip cartridge assembly as described above.

[0020] The third object of the present application is to provide a clip feeding structure driving method of the clip applier as described above, which comprises a clip feeding structure advancing step and a clip feeding structure pulling back step,

[0021] The clip feeding structure advancing step comprises:

[0022] S11, in the initial state, the clip feeding structure is located at the proximal initial position, and the telescopic sleeve is located at the telescopic sleeve initial position; the clip feeding structure moves to the distal end, and the telescopic sleeve is pushed to move to the distal end together with the clip feeding structure through the first reset member, the second reset member and the linkage member, until the telescopic sleeve moves to the telescopic sleeve terminal position to the distal end, and the clip feeding structure is located at the clip feeding position;

[0023] S12, the clip feeding structure continues to move to the distal end from the clip feeding position, the first reset member and the second reset member are deformed relative to the initial state, the hemostatic clip in the clip cartridge structure is pushed to move to the distal end, until the hemostatic clip is pushed into the clip jaw, and the clip feeding structure is located at the distal end terminal position;

[0024] The clip feeding structure pulling back step comprises:

[0025] S21, the sending clamp structure moves from the distal end termination position to the sending clamp position, and the first reset member and the second reset member return to the initial state; the sending clamp structure moves from the sending clamp position to the proximal end, and the first reset member, the second reset member and the linkage member push the telescopic sleeve to move to the proximal end together with the sending clamp structure, until the telescopic sleeve moves to the telescopic sleeve initial position, at this time the sending clamp structure is located in the proximal end initial position.

[0026] (III) Beneficial Effects

[0027] The beneficial effects of the present application are:

[0028] 1. The clamp chamber assembly of the present application not only can realize the sending clamp function and the firing function (i.e. the function of closing the clamp), but also can realize the automatic extension of the clamp and the automatic retraction of the clamp during use, avoiding manual retraction of the clamp and reducing tissue damage. Moreover, the clamp chamber assembly of the present application can make the telescopic sleeve in the collapsed state in the initial state, so that the volume of the clamp chamber assembly in the initial state is small, reducing the occupied space of the clamp chamber assembly during transportation. Furthermore, the clamp chamber assembly of the present application only needs to add (improve) a small amount of structure to realize the automatic retraction of the clamp, which is simple in structure and easy to process.

[0029] 2. By mutually sleeving the distal end of the fixed sleeve and the proximal end of the telescopic sleeve, the first blocking member and the second blocking member are arranged between the fixed sleeve and the telescopic sleeve, the first blocking member is arranged on the fixed sleeve, and the second blocking member is arranged on the telescopic sleeve; when the telescopic sleeve is located at the telescopic sleeve termination position, the first blocking member and the second blocking member are in contact. In this way, the structure is simple, and it is ensured that after the telescopic sleeve moves to the telescopic sleeve termination position, the fixed sleeve can block the telescopic sleeve from moving further to the distal end.

[0030] 3. By designing the first firing sheet and the second firing sheet as separate parts, and enabling the second firing sheet to move relative to the telescopic sleeve between the firing initial position and the firing termination position, when the second firing sheet is located at the firing initial position, the telescopic sleeve can drive the second firing sheet to move to the distal end together, and during the process of the telescopic sleeve moving to the distal end, the second firing sheet can be located at the firing initial position, so that the second firing sheet and the telescopic sleeve are kept within a set distance, and when the set distance is a safety distance, interference between the second firing sheet and the components (i.e. the clamp, the clamp chamber structure, the inner liner, etc.) linked with the telescopic sleeve can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0031] The present application is described with the help of the following drawings:

[0032] Figure 1 is a cross-sectional view of the clip applier provided in embodiment 1 of the present application;

[0033] Figure 2A sectional view of the clip cartridge assembly provided in Embodiment 1 of the present application, wherein the clip feeding structure is shown in the proximal initial position and the telescopic sleeve is shown in the telescopic sleeve initial position;

[0034] Figure 3 A sectional view of the clip cartridge assembly provided in Embodiment 1 of the present application, wherein the clip feeding structure is shown in the proximal initial position and the telescopic sleeve is shown in the telescopic sleeve initial position; Figure 2

[0035] Figure 4 A sectional view of the clip cartridge assembly provided in Embodiment 1 of the present application, wherein the clip feeding structure is shown in the proximal initial position and the telescopic sleeve is shown in the telescopic sleeve initial position; Figure 2

[0036] Figure 5 A sectional view of the clip cartridge assembly provided in Embodiment 1 of the present application, wherein the clip feeding structure is shown in the proximal initial position and the telescopic sleeve is shown in the telescopic sleeve initial position; Figure 2

[0037] Figure 6 A sectional view of the clip cartridge assembly provided in Embodiment 1 of the present application, wherein the clip feeding structure is shown in the proximal initial position and the telescopic sleeve is shown in the telescopic sleeve initial position; Figure 2

[0038] Figure 7 A sectional view of the clip cartridge assembly provided in Embodiment 1 of the present application, wherein the clip feeding structure is shown in the proximal initial position and the telescopic sleeve is shown in the telescopic sleeve initial position. Figure 2

[0039]

BRIEF DESCRIPTION OF THE DRAWINGS

[0040] 1: tube body;

[0041] 11: second connecting piece;

[0042] 2: fixed sleeve;

[0043] 21: first blocking piece;

[0044] 3: telescopic sleeve;

[0045] 31: linkage; 32: first reset piece; 33: second reset piece; 34: second blocking piece; 35: inner liner; 36: second accommodating groove; 37: pressing block;

[0046] 41: hemostatic clip; 42: clip cartridge;

[0047] 51: clip pushing piece; 52: filling part; 53: first accommodating groove; 54: first waist-shaped hole;

[0048] 61: first side wall; 62: second side wall; 63: first firing piece; 64: second firing piece; 65: third blocking piece; 66: second accommodating cavity; 67: third connecting piece;

[0049] 7: clip jaw;

[0050] ​​​​​71: first clamping arm; 72: second clamping arm; 73: fixed plate; 74: third waist-shaped hole;

[0051] 81: clamping bin shaft; 82: third reset member; 83: fourth reset member; 84: fifth reset member; 85: first connecting member; 86: first accommodating cavity; 87: bolt;

[0052] 9: adapter;

[0053] 91: insertion channel; 92: driving shaft. DETAILED DESCRIPTION

[0054] In order to better explain the present application, so as to be understood, the present application is described in detail by specific embodiments in combination with the drawings. Wherein, the "near" mentioned in this paper refers to the side close to the operator, and the "far" refers to the side close to the patient. The "upper", "lower", "front", "rear", "left", "right" and other orientation terms mentioned in this paper are referred to the orientation of the figure, wherein the direction from near to far is also the direction from back to front. Figure 1

[0055] Example 1

[0056] As shown in Figures 1 to 7 , the present embodiment provides a clip applier, which comprises an adapter 9 and a clip bin assembly.

[0057] Wherein, the clip bin assembly comprises a transmission structure, a clip bin structure, a clip feeding structure, a firing structure, a clip jaw 7, and a tube body 1, a fixed sleeve 2 and an extension sleeve 3 arranged in order from near to far.

[0058] The distal end of the tube body 1 communicates with the proximal end of the fixed sleeve 2, and the proximal end of the fixed sleeve 2 is fixedly connected to the distal end of the tube body 1. The distal end of the fixed sleeve 2 communicates with the proximal end of the extension sleeve 3, and the distal end of the fixed sleeve 2 and the proximal end of the extension sleeve 3 are slidingly connected. The extension sleeve 3 can slide distally to the extension sleeve termination position. The tube body 1 can be the outer shell of the proximal end of the clip bin assembly, or a component inside the outer shell of the proximal end of the clip bin assembly. The tube body 1 itself can be a one-piece or a split piece. One of the functions of the tube body 1 is that its inner wall provides a limiting structure to limit the activity position of the movable component.

[0059] ​The transmission structure is accommodated in the tube body 1, the distal end of the clip cartridge structure is inserted into the telescopic sleeve 3, the proximal end of the clip jaw 7 is inserted into the telescopic sleeve 3, and the clip cartridge structure and the clip jaw 7 are linked with the telescopic sleeve 3 in the distal-proximal direction. The distal end of the clip feeding structure is inserted into the fixed sleeve 2 and the telescopic sleeve 3, the proximal end of the clip feeding structure is inserted into the tube body 1, and the proximal end of the clip feeding structure is connected with the transmission structure, so that the transmission structure drives the clip feeding structure to move in the distal-proximal direction, for pushing the hemostatic clip 41 in the clip cartridge structure into the clip jaw 7 (when the transmission structure drives the clip feeding structure to move distally), and for resetting the clip feeding structure after pushing the hemostatic clip 41 to the initial state (when the transmission structure drives the clip feeding structure to move proximally). The distal end of the firing structure is inserted into the fixed sleeve 2 and the telescopic sleeve 3, the proximal end of the firing structure is inserted into the tube body 1, and the proximal end of the firing structure is connected with the transmission structure, so that the transmission structure drives the firing structure to move in the distal-proximal direction after the clip feeding structure feeds the hemostatic clip 41 into the clip jaw 7, for the firing structure to close the clip jaw 7 (when the transmission structure drives the firing structure to move distally), and for resetting the firing structure after closing the clip jaw 7 to the initial state (when the transmission structure drives the firing structure to move proximally).

[0060] The telescopic sleeve 3 has a linkage 31 extending from the inner wall of the telescopic sleeve 3 to the inside of the telescopic sleeve 3. A first reset member 32 is arranged on the proximal side of the linkage 31, and a second reset member 33 is arranged on the distal side of the linkage 31. The first reset member 32 is located between the clip feeding structure and the linkage 31, and the second reset member 33 is also located between the clip feeding structure and the linkage 31. The clip feeding structure can move between a proximal initial position, a clip feeding position and a distal terminal position arranged from proximal to distal; when the clip feeding structure is located at the proximal initial position, the first reset member 32 and the second reset member 33 both provide a pre-tightening force between the clip feeding structure and the linkage 31, so that the telescopic sleeve 3 is located at the telescopic sleeve initial position (at this time, the force generated by the first reset member 32 and the force generated by the second reset member 33 are balanced). The above-mentioned pre-tightening force can be a deformation force generated by compression of the first reset member 32 and the second reset member 33 or a deformation force generated by stretching of the first reset member 32 and the second reset member 33. The first reset member 32 and the second reset member 33 can be tension springs, compression springs, rubber members, etc.

[0061] The clip cartridge assembly thus arranged, in the initial state, the clip feeding structure is located at the proximal initial position; the first reset member 32 and the second reset member 33 both provide pre-tightening force between the clip feeding structure and the linkage 31, so that the telescopic sleeve 3 is located at the telescopic sleeve initial position; the firing structure is located at the firing structure initial position. Then the transmission structure drives the clip feeding structure to move distally, when the telescopic sleeve initial position is located proximally of the telescopic sleeve terminal position, due to the distal movement of the clip feeding structure, the first reset member 32 and the second reset member 33 will drive the linkage 31 to move distally along with the clip feeding structure in order to maintain the balance state, therefore, firstly the clip feeding structure will transmit the pushing force to the linkage 31 through the first reset member 32 and the second reset member 33, and push the telescopic sleeve 3 to move distally along with the clip feeding structure (i.e. push the clip cartridge and the clip jaw 7 to move distally along with the clip feeding structure), until the telescopic sleeve 3 moves distally to the telescopic sleeve terminal position, at this time the clip feeding structure is located at the clip feeding position; then the clip feeding structure continues to move distally, since the telescopic sleeve 3 is stationary (i.e. the linkage 31, the clip cartridge structure and the clip jaw 7 are stationary in the proximal-distal direction), the first reset member 32 and the second reset member 33 are deformed relative to the initial state, and the clip feeding structure moves distally relative to the clip cartridge structure to push the hemostatic clip 41 in the clip cartridge structure to move distally, until the hemostatic clip 41 is pushed into the clip jaw 7, at this time the clip feeding structure is located at the distal terminal position. After that, the transmission structure drives the firing structure to move distally, and the firing structure moves distally to the firing structure terminal position, so that the clip jaw 7 is closed. Finally, the transmission structure drives the clip jaw 7, the clip feeding structure and the telescopic sleeve 3 to reset to the initial state, during the reset process, firstly the transmission structure drives the firing structure to move proximally from the firing terminal position to the firing initial position, so that the clip jaw 7 is opened, then the transmission structure drives the clip feeding structure to move proximally from the distal terminal position to the clip feeding position, the first reset member 32 and the second reset member 33 return to the initial state, then the transmission structure continues to drive the clip feeding structure to move proximally from the clip feeding position, at this time the clip feeding structure will transmit the pushing force to the linkage 31 through the first reset member 32 and the second reset member 33, and push the telescopic sleeve 3 to move proximally along with the clip feeding structure (i.e. push the clip cartridge and the clip jaw 7 to move proximally along with the clip feeding structure), until the telescopic sleeve 3 moves proximally from the telescopic sleeve terminal position to the telescopic sleeve initial position, at this time the clip feeding structure is located at the proximal initial position.

[0062] It can be seen that the clip cartridge assembly of the embodiment not only can realize the functions of clip feeding and firing (i.e. the function of closing the clip jaw 7), but also can realize the automatic extension and automatic retraction of the clip jaw 7 during use, avoiding manual retraction of the clip jaw 7 and reducing tissue damage. Moreover, in the initial state, the telescopic sleeve 3 of the clip cartridge assembly of the embodiment can be in the contracted state, so that the clip cartridge assembly in the initial state has a small size, reducing the occupied space of the clip cartridge assembly during transportation. Furthermore, in order to realize the automatic retraction of the clip jaw 7, the clip cartridge assembly of the embodiment only needs to add (improve) a small amount of structure, which is simple in structure and convenient to process.

[0063] The adapter 9 comprises an insertion channel 91 and a drive shaft 92 inserted in the insertion channel 91.

[0064] The proximal end of the tube body 1 is inserted into the insertion channel 91, and the proximal end of the tube body 1 is connected with the insertion channel 91. The drive shaft 92 is located at the proximal side of the transmission structure, and the distal end of the drive shaft 92 is connected with the proximal end of the transmission structure for driving the transmission structure. In this embodiment, the proximal end of the tube body 1 is relatively immovable with the insertion channel 91 in the distal-proximal direction.

[0065] Preferably, the pre-tightening force provided by the first return member 32 and the second return member 33 between the clamping structure and the linkage 31 is the deformation force generated by the compression of the first return member 32 and the second return member 33. In this way, the clamping structure can drive the telescopic sleeve 3 to extend and retract stably. Further preferably, in this embodiment, the first return member 32 and the second return member 33 are both compression springs.

[0066] Specifically, the first return member 32 is located between the clamping structure and the linkage 31, and in this embodiment, the proximal end of the first return member 32 abuts against the clamping structure, and the distal end of the first return member 32 abuts against the linkage 31. Of course, the proximal end of the first return member 32 can be fixedly connected (such as adhesion, connection by hooks, etc.) with the clamping structure, and the distal end of the first return member 32 can be fixedly connected (such as adhesion, connection by hooks, etc.) with the linkage 31. Similarly, the second return member is located between the clamping structure and the linkage 31, which is similar to the above-mentioned first return member 32 located between the clamping structure and the linkage 31, and will not be described here.

[0067] Specifically, when the clamping structure is located at the distal end termination position, the clamping structure is blocked by the limiting structure from continuing to move distally, and in this embodiment, the limiting structure is a pressing block 37 located in the telescopic sleeve 3 and fixed at the distal end of the telescopic sleeve 3. When the clamping structure is located at the distal end termination position, the distal end of the clamping structure contacts the pressing block 37, and the pressing block 37 blocks the clamping structure from continuing to move distally.

[0068] Preferably, as shown in Figure 2 and Figure 3 the distal end of the fixed sleeve 2 and the proximal end of the telescopic sleeve 3 are mutually sleeved, a first blocking member 21 and a second blocking member 34 are arranged between the fixed sleeve 2 and the telescopic sleeve 3, the first blocking member 21 is arranged on the fixed sleeve 2, and the second blocking member 34 is arranged on the telescopic sleeve 3; when the telescopic sleeve 3 is located at the telescopic sleeve termination position, the first blocking member 21 contacts the second blocking member 34. In this way, the structure is simple, and it is ensured that after the telescopic sleeve 3 moves to the telescopic sleeve termination position, the fixed sleeve 2 can block the telescopic sleeve 3 from continuing to move distally.

[0069] Preferably, as shown in Figure 3As shown, in the present embodiment, the distal end of the fixed sleeve 2 is sleeved on the proximal end of the telescopic sleeve 3, the distal end of the fixed sleeve 2 has a first blocking piece 21 extending from the inner wall of the fixed sleeve 2 to the inside of the fixed sleeve 2, the proximal end of the telescopic sleeve 3 has a second blocking piece 34 extending from the outer wall of the telescopic sleeve 3 to the outside of the telescopic sleeve 3, and the second blocking piece 34 is located proximally to the first blocking piece 21; when the telescopic sleeve 3 is located at the telescopic sleeve termination position, the distal end of the second blocking piece 34 is in contact with the proximal end of the first blocking piece 21.

[0070] It is conceivable that the proximal end of the telescopic sleeve 3 is sleeved on the distal end of the fixed sleeve 2, the distal end of the fixed sleeve 2 has a first blocking piece 21 extending from the outer wall of the fixed sleeve 2 to the outside of the fixed sleeve 2, the proximal end of the telescopic sleeve 3 has a second blocking piece 34 extending from the inner wall of the telescopic sleeve 3 to the outside of the telescopic sleeve 3, and the second blocking piece 34 is located proximally to the first blocking piece 21; when the telescopic sleeve 3 is located at the telescopic sleeve termination position, the distal end of the second blocking piece 34 is in contact with the proximal end of the first blocking piece 21. In this way, similar effects can also be achieved.

[0071] Further preferably, the first blocking piece 21 is distributed around the circumference of the fixed sleeve 2, and the second blocking piece 34 is distributed around the circumference of the telescopic sleeve 3. In this way, the blocking between the first blocking piece 21 and the second blocking piece 34 is stable. Herein, the first blocking piece 21 can be multiple or one, and similarly, the second blocking piece 34 can be multiple or one; in the present embodiment, the first blocking piece 21 is one, and the first blocking piece 21 is annular; the second blocking piece 34 is one, and the second blocking piece 34 is annular.

[0072] Further preferably, when the distal end of the fixed sleeve 2 is sleeved on the proximal end of the telescopic sleeve 3, the bottom of the first blocking piece 21 (i.e. the part of the first blocking piece 21 close to the inside of the fixed sleeve 2) is in contact with the outer wall of the telescopic sleeve 3, and / or the top of the second blocking piece 34 (i.e. the part of the second blocking piece 34 away from the inside of the telescopic sleeve 3) is in contact with the inner wall of the fixed sleeve 2. In this way, the telescopic sleeve 3 is not prone to deflection in the left-right direction or the up-down direction relative to the fixed sleeve 2, the telescopic sleeve 3 slides stably relative to the fixed sleeve 2, and there is no need to additionally provide a support structure between the fixed sleeve 2 and the telescopic sleeve 3, so that the structure is simple.

[0073] Further preferably, the first blocking piece 21 is located at the distal end of the fixed sleeve 2, and the second blocking piece 34 is located at the proximal end of the telescopic sleeve 3. In this way, the length of the fixed sleeve 2 and the telescopic sleeve 3 in the distal-proximal direction is reduced, i.e. the consumption of materials of the fixed sleeve 2 and the telescopic sleeve 3 is reduced, and the cost is low.

[0074] Preferably, the linkage 31 is arranged at the proximal end of the telescopic sleeve 3, and the proximal end of the linkage 31 is flush with the proximal end of the second blocking member 34. In this way, the telescopic sleeve 3 provided with the second blocking member 34 and the linkage 31 can be integrally manufactured.

[0075] To enable the pusher structure to effectively transmit the pushing force to the linkage 31 (i.e. the telescopic sleeve 3) through the first return member 32 and the second return member 33. Preferably, the linkage 31 is distributed around the circumference of the telescopic sleeve 3, the first return member 32 is annular and distributed around the circumference of the telescopic sleeve 3, and the second return member 33 is annular and distributed around the circumference of the telescopic sleeve 3. In this way, the pushing force provided by the pusher structure can be effectively transmitted to the circumference of the telescopic sleeve 3 to stabilize the movement of the telescopic sleeve 3 in the distal or proximal direction. The linkage 31 can be multiple or one. In the embodiment, the linkage 31 is one, and the linkage 31 is annular.

[0076] Specifically, as shown in Figure 2 , Figure 6 and Figure 7 , in the clip cartridge assembly, the clip cartridge structure includes a plurality of hemostatic clips 41 and a clip cartridge 42 accommodating the plurality of hemostatic clips 41, the clip cartridge 42 is arranged near the middle of the telescopic sleeve 3 in the up-down direction, the clip cartridge 42 has a clip bearing side for bearing the hemostatic clips 41 and a clip pushing side for the pusher structure to push the hemostatic clips 41, the clip bearing side and the clip pushing side are oppositely arranged, and the clip pushing side of the clip cartridge 42 faces the upper part of the telescopic sleeve 3; the pusher structure includes a pusher piece 51, the distal end of the pusher piece 51 is inserted into the fixed sleeve 2 and the telescopic sleeve 3, the proximal end of the pusher piece 51 is inserted into the tube body 1, the proximal end of the pusher piece 51 is connected with the transmission mechanism, and the distal end of the pusher piece 51 is located above the clip cartridge 42. To fill the space between the fixed sleeve 2 and the pusher piece 51, and to fill the space between the telescopic sleeve 3 and the pusher piece 51, the distal end of the pusher piece 51 further has an upward filling portion 52. The hemostatic clip 41 can be a high polymer clip or a metal clip.

[0077] Preferably, the top end of the filling portion 52 is provided with a first accommodating groove 53 extending in the distal-proximal direction, the linkage 31 extends into the first accommodating groove 53, the first return member 32 is located between the proximal end of the first accommodating groove 53 and the linkage 31, and the second return member 33 is located between the distal end of the first accommodating groove 53 and the linkage 31.

[0078] Preferably, the clip cartridge assembly further comprises an inner liner 35 fixed at the bottom of the telescopic sleeve 3 for supporting the clip pliers 7, the clip cartridge structure, the clip feeding structure and the firing structure; the inner liner 35 has a second accommodating groove 36 extending in the proximal-distal direction at the bottom end thereof, the linkage 31 extends into the second accommodating groove 36, the first return member 32 is located between the proximal end of the second accommodating groove 36 and the linkage 31, and the second return member 33 is located between the distal end of the second accommodating groove 36 and the linkage 31. In this way, the structure is compact, and the clip feeding structure further stably transmits the pushing force to the linkage 31 through the first return member 32 and the second return member 33.

[0079] Specifically, as shown in Figure 4 、 Figure 6 and Figure 7 , in the clip cartridge assembly, the distal end of the clip pliers 7 has a first clip arm 71 and a second clip arm 72 extending in the proximal-distal direction, the first clip arm 71 and the second clip arm 72 are arranged in the left-right direction, a plier gap is formed between the first clip arm 71 and the second clip arm 72, the plier gap has a distal end opening and a proximal end opening, the proximal end opening is in communication with the inside of the clip cartridge for the hemostatic clip 41 to enter the plier gap, and the distal end opening extends out of the telescopic sleeve 3 for accommodating the blood vessel. Without external force, the plier gap is in an open state, and under the action of external force, the plier gap is forced to close, so that the hemostatic clip 41 in the plier gap is closed to clamp and stop bleeding of the blood vessel.

[0080] Specifically, in the clip cartridge assembly, the distal end of the firing structure has a closing head for closing the clip pliers 7. In an embodiment, the closing head is a first side wall 61 and a second side wall 62 arranged in the left-right direction, during the firing process (i.e., during the movement of the firing structure to the distal end), the first clip arm 71 and the second clip arm 72 are located between the first side wall 61 and the second side wall 62, the first clip arm 71 is adjacent to the first side wall 61 and presses the first side wall 61 to move close to the second side wall 62, and the second clip arm 72 is adjacent to the second side wall 62 and presses the first side wall 61 to move close to the second side wall 62. In this way, the closing of the plier gap and the clamping of the hemostatic clip 41 in the plier gap are achieved by the firing structure during the firing process.

[0081] Preferably, the firing structure comprises a first firing piece 63 and a second firing piece 64, the first firing piece 63 is located proximally to the second firing piece 64, the proximal end of the first firing piece 63 is connected with the transmission structure, the distal end of the second firing piece 64 is provided with a closure head, the distal end of the first firing piece 63 can be connected with the proximal end of the second firing piece 64 during the distal movement of the first firing piece 63, and the second firing piece 64 is driven to move distally; the second firing piece 64 can move relative to the telescopic sleeve 3 between the firing initial position and the firing terminal position, the telescopic sleeve 3 can drive the second firing piece 64 to move distally when the second firing piece 64 is located at the firing initial position; the telescopic sleeve 3 can enable the second firing piece 64 to be located at the firing initial position during the distal movement of the telescopic sleeve 3. The firing structure arranged in this way can realize the clamping of the clamp 7, and the clamp 7 can be reset and retreated due to the elastic restoring force during the proximal movement of the first firing piece 63.

[0082] Of course, the first firing piece 63 and the second firing piece 64 are an integral piece that is always connected together, and the clamping function of the firing structure to the clamp 7 can also be realized, but the first firing piece 63 and the second firing piece 64 arranged in an integral manner are all retreated relative to the telescopic sleeve 3 during the extension of the telescopic sleeve 3, which is easy to cause the second firing piece 64 to interfere with the components (i.e. the clamp 7, the clamp chamber structure, the inner liner 35, etc.) linked with the telescopic sleeve 3, and the clamp chamber assembly is unstable. Therefore, the first firing piece 63 and the second firing piece 64 are designed as separate pieces in this embodiment, and the second firing piece 64 can move relative to the telescopic sleeve 3 between the firing initial position and the firing terminal position, the telescopic sleeve 3 can drive the second firing piece 64 to move distally when the second firing piece 64 is located at the firing initial position, and the telescopic sleeve 3 can enable the second firing piece 64 to be located at the firing initial position during the distal movement of the telescopic sleeve 3, so that the second firing piece 64 is kept within a set distance from the telescopic sleeve 3, and the interference between the second firing piece 64 and the components (i.e. the clamp 7, the clamp chamber structure, the inner liner 35, etc.) linked with the telescopic sleeve 3 can be avoided when the set distance is a safe distance.

[0083] Further preferably, the proximal end of the clamp 7 is provided with a fixed plate 73 for being fixedly installed in the telescopic sleeve 3, the fixed plate 73 is located below the clamp chamber, and the second firing piece 64 is located below the fixed plate 73; the second firing piece 64 is provided with an upward third blocking piece 65, and the fixed plate 73 is provided with a third waist-shaped hole 74 extending along the proximal-distal direction and for the third blocking piece 65 to extend into; the proximal end of the third blocking piece 65 contacts the proximal end of the third waist-shaped hole 74 when the second firing piece 64 is located at the firing initial position.

[0084] Of course, the second firing piece 64 has an upward third blocking piece 65, and the fixing plate 73 has a third waist-shaped hole 74 extending along the proximal-distal direction and allowing the third blocking piece 65 to extend into the third waist-shaped hole 74, which is only preferred. Conceivably, the fixing plate 73 has a downward third blocking piece 65, and the second firing piece 64 has a third waist-shaped hole 74 allowing the third blocking piece 65 to extend into the third waist-shaped hole 74, and when the second firing piece 64 is in the initial firing position, the distal end of the third blocking piece 65 contacts the distal end of the third waist-shaped hole 74, which can also achieve similar effects.

[0085] Further preferably, the firing structure further comprises a sixth reset piece (not shown in the drawings), which is located between the second firing piece 64 and the clamp 7, and stores energy during the movement of the second firing piece 64 from the initial firing position to the terminal firing position. In this way, the clamp 7 can be reset to the initial state smoothly. The above-mentioned energy storage can be compression-induced deformation force or tension-induced deformation force; the sixth reset piece can be a tension spring, a compression spring, a rubber piece, etc.

[0086] Specifically, as shown in FIGS. Figure 5 , Figure 6 and Figure 7 , in the clamp cartridge assembly, the transmission structure comprises a clamp cartridge shaft 81, a third reset piece 82, a fourth reset piece 83, and a fifth reset piece 84.

[0087] The proximal end of the clamp cartridge shaft 81 is inserted into the tube body 1, and the proximal end of the clamp cartridge shaft 81 has a first connecting piece 85 extending from the outer wall of the clamp cartridge shaft 81 to the inner wall of the tube body 1, and the tube body 1 has a second connecting piece 11 extending from the inner wall of the tube body 1 to the inside of the tube body 1, and the second connecting piece 11 is located distally of the first connecting piece 85; the third reset piece 82 is arranged between the first connecting piece 85 and the second connecting piece 11, and the first end of the third reset piece 82 abuts against the first connecting piece 85, and the second end of the third reset piece 82 abuts against the second connecting piece 11. The distal end of the clamp cartridge shaft 81 is provided with a first accommodating cavity 86, and the distal end of the first accommodating cavity 86 is fixedly provided with a latch 87, and the proximal end of the push clip 51 has a first waist-shaped hole 54 extending along the proximal-distal direction, and the proximal end of the push clip 51 is inserted into the first accommodating cavity 86, and the latch 87 is inserted into the first waist-shaped hole 54, and the fourth reset piece 83 is accommodated in the first accommodating cavity 86, and the first end of the fourth reset piece 83 is connected to the proximal end of the first accommodating cavity 86, and the second end of the fourth reset piece 83 is connected to the proximal end of the push clip 51, and when the push clip 51 is in the initial proximal end position, the latch 87 is adjacent to the proximal end of the first waist-shaped hole 54, and the fourth reset piece 83 provides compression-induced deformation force between the proximal end of the first accommodating cavity 86 and the proximal end of the push clip 51.

[0088] The proximal end of the firing structure is provided with a second accommodating cavity 66, the proximal end of the second accommodating cavity 66 is sleeved on the distal end of the cartridge shaft 81, and the fifth reset member 84 is located between the proximal end of the firing structure and the distal end of the tube body 1; when the firing structure is located at the initial position of the proximal end of firing, the second connecting member 11 is in contact with the proximal end of the firing structure, thereby preventing the firing structure from moving proximally, and the fifth reset member 84 provides a deformation force generated by compression between the proximal end of the firing structure and the distal end of the tube body 1. In this embodiment, the proximal end of the firing structure is provided with a third connecting member 67 extending to the inner wall of the tube body 1, when the firing structure is located at the initial position of the proximal end of firing, the second connecting member 11 is in contact with the third connecting member 67, thereby preventing the firing structure from moving proximally, and the fifth reset member 84 provides a deformation force generated by compression between the third connecting member 67 and the distal end of the tube body 1.

[0089] In this way, the cartridge shaft 81 moves distally, the third reset member 82 is compressed, and the fourth reset member 83 can drive the cartridge feeding structure to move distally. The cartridge shaft 81 can move between the initial position of the proximal end of the cartridge shaft 81, the cartridge feeding position of the cartridge shaft 81, the end position of cartridge feeding of the cartridge shaft 81, the start position of firing of the cartridge shaft 81, and the distal end termination position of the cartridge shaft 81. When the cartridge shaft 81 is located at the initial position of the proximal end of the cartridge shaft 81, the cartridge feeding structure is located at the initial position; when the cartridge shaft 81 is located at the cartridge feeding position of the cartridge shaft 81, the cartridge feeding structure is located at the cartridge feeding position; when the cartridge shaft 81 is located at the end position of cartridge feeding of the cartridge shaft 81, the cartridge feeding structure is located at the distal end termination position. When the cartridge shaft 81 continues to move distally from the end position of cartridge feeding of the cartridge shaft 81, the fourth reset member 83 is compressed, and the third reset member 82 continues to be compressed. When the cartridge shaft 81 is located at the start position of firing of the cartridge shaft 81, the first connecting member 85 is in contact with the distal end of the firing structure, the cartridge shaft 81 continues to move distally from the start position of firing of the cartridge shaft 81, the firing structure is driven to move distally by the first connecting member 85, the fifth reset member 84 is compressed, and the firing is completed when the cartridge shaft 81 moves to the distal end termination position of the cartridge shaft 81. Then, the cartridge shaft 81 moves proximally, the cartridge shaft 81 moves from the distal end termination position of the cartridge shaft 81 to the start position of firing of the cartridge shaft 81, and the firing structure is reset by the reset of the fifth reset member 84; the cartridge shaft 81 moves from the end position of cartridge feeding of the cartridge shaft 81 to the cartridge feeding position of the cartridge shaft 81, and the cartridge feeding structure is partially reset by the reset of the fourth reset member 83 and the latch 87; the cartridge shaft 81 moves from the cartridge feeding position of the cartridge shaft 81 to the initial position of the proximal end of the cartridge shaft 81, and the cartridge feeding structure is completely reset by the reset of the fourth reset member 83 and the latch 87, and the telescopic sleeve 3 is reset. The end position of cartridge feeding of the cartridge shaft 81 and the start position of firing of the cartridge shaft 81 can coincide.

[0090] The third reset member 82, the fourth reset member 83, and the fifth reset member 84 described above can be a tension spring, a compression spring, a rubber member, etc.

[0091] Specifically, the adapter 9 is further provided with a driving mechanism connected with the driving shaft 92 and driving the driving shaft 92 to move along its axial direction. The driving mechanism can adopt any mechanism capable of achieving its function. Preferably, the driving mechanism comprises a driving motor / motor whose rotating main shaft forms a "screw nut" transmission relationship with the driving shaft 92, and converts the rotation of the rotating main shaft into the linear motion of the driving shaft 92 along the axial direction.

[0092] Embodiment 2

[0093] The embodiment uses the clip feeding structure driving method of the clip applier of embodiment 1, which comprises a clip feeding structure advancing step and a clip feeding structure retracting step.

[0094] The clip feeding structure advancing step comprises:

[0095] S11, in the initial state, the pusher is located at the proximal initial position, and the telescopic sleeve 3 is located at the telescopic sleeve initial position; the pusher moves distally, and the telescopic sleeve 3 is pushed to move distally together with the pusher by the first return member 32, the second return member 33 and the linkage 31 until the telescopic sleeve 3 moves distally to the telescopic sleeve terminal position, at which time the pusher is located at the clip feeding position.

[0096] S12, the pusher continues to move distally from the clip feeding position, the first return member 32 and the second return member 33 are deformed relative to the initial state, and the hemostatic clip 41 in the clip cartridge is pushed to move distally until it is pushed into the clip jaw 7, at which time the pusher is located at the distal terminal position.

[0097] The clip feeding structure retracting step comprises:

[0098] S21, the pusher moves proximally from the distal terminal position to the clip feeding position, and the first return member 32 and the second return member 33 return to the initial state; the pusher moves proximally from the clip feeding position, and the telescopic sleeve 3 is pushed to move proximally together with the pusher by the first return member 32, the second return member 33 and the linkage 31 until the telescopic sleeve 3 moves proximally to the telescopic sleeve initial position, at which time the pusher is located at the proximal initial position.

[0099] In summary, the clip feeding structure driving method of the clip applier proposed in the embodiment not only ensures that the clip feeding structure realizes the clip feeding function, but also realizes that the telescopic sleeve 3 is driven by the clip feeding structure to move out and retract, thereby realizing the automatic extension and automatic retraction of the clip jaw 7, which greatly reduces the risk of surgery.

[0100] Embodiment 3

[0101] The main difference between the embodiment and embodiment 1 is that:

[0102] The distal end of the fixed sleeve is sleeved on the proximal end of the telescopic sleeve, the proximal end of the telescopic sleeve has a second blocking piece extending from the outer wall of the telescopic sleeve to the outside of the telescopic sleeve, and the distal end of the fixed sleeve has a second waist-shaped hole for the second blocking piece to extend into; when the telescopic sleeve is located at the telescopic sleeve termination position, the distal end of the second blocking piece is in contact with the distal end of the second waist-shaped hole. In this way, the structure is simple, and the fixed sleeve can still block the telescopic sleeve from moving further distally after the telescopic sleeve moves to the telescopic sleeve termination position.

[0103] It is conceivable that the distal end of the fixed sleeve is sleeved on the proximal end of the telescopic sleeve, the distal end of the fixed sleeve has a first blocking piece extending from the inner wall of the fixed sleeve to the inside of the fixed sleeve, and the proximal end of the telescopic sleeve has a first waist-shaped hole for the first blocking piece to extend into; when the telescopic sleeve is located at the telescopic sleeve termination position, the proximal end of the first blocking piece is in contact with the proximal end of the second waist-shaped hole. In this way, similar effects can be achieved.

[0104] It is conceivable that the proximal end of the telescopic sleeve is sleeved on the distal end of the fixed sleeve, the proximal end of the telescopic sleeve has a second blocking piece extending from the inner wall of the telescopic sleeve to the inside of the telescopic sleeve, and the distal end of the fixed sleeve has a second waist-shaped hole for the second blocking piece to extend into; when the telescopic sleeve is located at the telescopic sleeve termination position, the distal end of the second blocking piece is in contact with the distal end of the second waist-shaped hole. In this way, similar effects can be achieved.

[0105] It is conceivable that the proximal end of the telescopic sleeve is sleeved on the distal end of the fixed sleeve, the distal end of the fixed sleeve has a first blocking piece extending from the outer wall of the fixed sleeve to the outside of the fixed sleeve, and the proximal end of the telescopic sleeve has a first waist-shaped hole for the first blocking piece to extend into; when the telescopic sleeve is located at the telescopic sleeve termination position, the proximal end of the second blocking piece is in contact with the proximal end of the second waist-shaped hole. In this way, similar effects can be achieved.

[0106] Correspondingly, the second waist-shaped hole is a plurality of, and the second blocking piece is also a plurality, the second waist-shaped hole is uniformly distributed along the circumference of the fixed sleeve, and the second blocking piece is uniformly distributed along the circumference of the telescopic sleeve. In this way, the blocking between the second waist-shaped hole and the second blocking piece is stable. In this embodiment, the second waist-shaped hole is two, and the second blocking piece is also two.

[0107] Correspondingly, when the proximal end of the telescopic sleeve is sleeved on the distal end of the fixed sleeve, the outer wall of the proximal end of the telescopic sleeve is in contact with the outer wall of the distal end of the fixed sleeve.

[0108] It should be noted that the fixed sleeve and the telescopic sleeve are not sleeved on each other, and the purpose of the present application can also be achieved, as long as the fixed sleeve and the telescopic sleeve are slidingly connected, and the telescopic sleeve can slide distally to the telescopic sleeve termination position.

[0109] The rest is the same as in example 1, which will not be repeated here.

[0110] Example 4

[0111] The main difference between this embodiment and embodiment 1 is that:

[0112] The distal end of the push clip does not have an upward filling part, but the distal end of the push clip has an upward first baffle and a second baffle, the first baffle is proximal to the second baffle, the linkage extends between the first baffle and the second baffle, the first reset member is between the first baffle and the linkage, and the second reset member is between the second baffle and the linkage.

[0113] The rest is the same as embodiment 1, which will not be repeated here.

[0114] It should be understood that the above description of specific embodiments of the application is only for the purpose of illustrating the technical route and characteristics of the application, and its purpose is to enable those skilled in the art to understand the content of the application and to implement it, but the application is not limited to the above specific embodiments. Any changes or modifications made within the scope of the claims of the present application should be covered within the scope of protection of the present application.

Claims

1. A cartridge assembly, characterized in that, comprising a pair of jaws (7), a cartridge structure, a clip feeding structure, a firing structure, and a fixed sleeve (2) and a telescopic sleeve (3) arranged in sequence from proximal to distal; the distal end of the fixed sleeve (2) is slidably connected to the proximal end of the telescopic sleeve (3), the telescopic sleeve (3) can slide distally to a telescopic sleeve terminal position; the cartridge structure and the pair of jaws (7) are both inserted into the telescopic sleeve (3) and are both linked with the telescopic sleeve (3) in the proximal-distal direction; the clip feeding structure is inserted into the fixed sleeve (2) and the telescopic sleeve (3) and can move between a proximal initial position, a clip feeding position and a distal terminal position arranged in sequence from proximal to distal; the telescopic sleeve (3) has a linkage (31), a first return element (32) and a second return element (33) are respectively arranged on the proximal side and the distal side of the linkage (31), and the first return element (32) and the second return element (33) are both located between the clip feeding structure and the linkage (31) ; when the clip feeding structure is in the proximal initial position, the first return element (32) and the second return element (33) both provide a pre-tightening force between the clip feeding structure and the linkage (31), and the telescopic sleeve (3) is in a telescopic sleeve initial position; when the clip feeding structure moves from the proximal initial position to the clip feeding position, the first return element (32) and the second return element (33) push the telescopic sleeve (3) to move from the telescopic sleeve initial position to the telescopic sleeve terminal position; the firing structure is inserted into the telescopic sleeve (3) ; the firing structure comprises a first firing piece (63) and a second firing piece (64), the first firing piece (63) is located proximally to the second firing piece (64), the proximal end of the first firing piece (63) is connected to a transmission structure, and the distal end of the second firing piece (64) is used to close the pair of jaws (7) ; during the distal movement of the first firing piece (63), the distal end of the first firing piece (63) can be connected to the proximal end of the second firing piece (64) to drive the distal movement of the second firing piece (64) ; the second firing piece (64) can move relative to the telescopic sleeve (3) between a firing initial position and a firing terminal position; when the second firing piece (64) is in the firing initial position, the telescopic sleeve (3) can drive the second firing piece (64) to move distally; during the distal movement of the telescopic sleeve (3), the second firing piece (64) can be located in the firing initial position. 2.The cartridge assembly according to claim 1, characterized in that, the distal end of the fixed sleeve (2) and the proximal end of the telescopic sleeve (3) are mutually sleeved, a first blocking element (21) is arranged on the fixed sleeve (2), and a second blocking element (34) is arranged on the telescopic sleeve (3). The first blocking piece (21) is separated from the second blocking piece (34) when the telescopic sleeve (3) is in the telescopic sleeve initial position and the telescopic sleeve (3) is in a position between the telescopic sleeve initial position and the telescopic sleeve terminal position. The first blocking piece (21) is in contact with the second blocking piece (34) when the telescopic sleeve (3) is in the telescopic sleeve terminal position.

3. The cartridge assembly according to claim 2, wherein The first blocking piece (21) is located at the distal end of the fixed sleeve (2), and the second blocking piece (34) is located at the proximal end of the telescopic sleeve (3).

4. The cartridge assembly according to claim 2, wherein The first blocking piece (21) extends from the inner wall of the fixed sleeve (2) to the inside of the fixed sleeve (2), the second blocking piece (34) extends from the outer wall of the telescopic sleeve (3) to the outside of the telescopic sleeve (3), and the second blocking piece (34) is located at the proximal end of the telescopic sleeve (3); The linkage (31) is arranged at the proximal end of the telescopic sleeve (3), and the proximal end of the linkage (31) is flush with the proximal end of the second blocking piece (34).

5. The cartridge assembly according to claim 1, wherein The linkage (31) is distributed around the circumference of the telescopic sleeve (3); the first return piece (32) is annular and is distributed around the circumference of the telescopic sleeve (3); and the second return piece (33) is annular and is distributed around the circumference of the telescopic sleeve (3).

6. The cartridge assembly according to claim 1, wherein The cartridge structure comprises a cartridge (42), and the cartridge feeding structure comprises a push clip (51); The cartridge (42) is arranged near the middle of the telescopic sleeve (3) in the up-down direction, the cartridge feeding side of the cartridge (42) faces the upper part of the telescopic sleeve (3), and the distal end of the push clip (51) is located above the cartridge (42); The distal end of the push clip (51) has an upward filling portion (52), the top end of the filling portion (52) is provided with a first accommodating groove (53) extending in the proximal-distal direction, the linkage (31) extends into the first accommodating groove (53), the first return piece (32) is located between the proximal end of the first accommodating groove (53) and the linkage (31), and the second return piece (33) is located between the distal end of the first accommodating groove (53) and the linkage (31).

7. The cartridge assembly according to claim 5, wherein The cartridge structure comprises a cartridge (42), and the cartridge feeding structure comprises a push clip (51); The cartridge (42) is arranged near the middle of the telescopic sleeve (3) in the up-down direction, the cartridge feeding side of the cartridge (42) faces the upper part of the telescopic sleeve (3), and the distal end of the push clip (51) is located above the cartridge (42); The clip cartridge assembly further comprises an inner liner (35) fixed at the bottom of the telescopic sleeve (3); the bottom end of the inner liner (35) has a second accommodating groove (36) extending in the distal-proximal direction, the linkage (31) extends into the second accommodating groove (36), the first reset member (32) is located between the proximal end of the second accommodating groove (36) and the linkage (31), and the second reset member (33) is located between the distal end of the second accommodating groove (36) and the linkage (31).

8. A clip applier, comprising: The clip cartridge assembly has the advantages of the clip cartridge assembly as claimed in any one of claims 1 to 7.

9. A method of driving a clip feeding structure of a clip applier as defined in claim 8, wherein The method comprises a clip structure pushing step and a clip structure pulling back step, The clip structure pushing step comprises: S11, in the initial state, the clip structure is located at the proximal initial position, and the telescopic sleeve is located at the telescopic sleeve initial position; the clip structure is moved distally, the telescopic sleeve is pushed to move distally together with the clip structure by the first reset member, the second reset member and the linkage, until the telescopic sleeve moves distally to the telescopic sleeve terminal position, at this time, the clip structure is located at the clip position; S12, the clip structure continues to move distally from the clip position, the first reset member and the second reset member are deformed relative to the initial state, the hemostatic clip in the clip cartridge structure is pushed to move distally, until the hemostatic clip is pushed into the clip jaw, at this time, the clip structure is located at the distal terminal position; The clip structure pulling back step comprises: S21, the clip structure moves proximally from the distal terminal position to the clip position, the first reset member and the second reset member return to the initial state; the clip structure moves proximally from the clip position, the telescopic sleeve is pushed to move proximally together with the clip structure by the first reset member, the second reset member and the linkage, until the telescopic sleeve moves proximally to the telescopic sleeve initial position, at this time, the clip structure is located at the proximal initial position.

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