Conveying and releasing assembly, conveying and releasing device and conveying and releasing system

Abstract

The utility model relates to the technical field of medical instruments, and discloses a conveying and releasing assembly, a conveying and releasing device and a conveying and releasing system. The conveying and releasing assembly comprises a handle mechanism and a driving switching mechanism. The handle mechanism comprises a fixed handle and a rotating handle, mounting cavities are formed in the fixed handle and the rotating handle, a connecting section of the rotating handle is located in the fixed handle, a first sliding groove is formed in the rotating section, and an internal thread structure is arranged on the inner wall of the rotating section. The driving switching mechanism comprises a supporting body, a rotating part, a control part and a conveying part, the supporting body is arranged in the handle mechanism, the rotating part and the conveying part are both arranged on the supporting body, the rotating part is provided with an external thread structure which is in threaded connection with the internal thread structure, the control part is arranged on the conveying part, and an operation part of the control part is located in the sliding groove; the conveying release assembly can achieve switching between a slow release state and a quick release state through matched use of the handle mechanism and the driving switching mechanism. The conveying and releasing assembly is easy and convenient to operate, simple in structure and low in cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to a delivery release subassembly, delivery release device and delivery release system. BACKGROUND

[0002] The covered stent is a kind of medical instrument for treating aortic diseases, mainly used for treating diseases such as aortic dissection, aortic intramural hematoma and aortic sinus rupture.The covered stent is a stent coated with special film material (polytetrafluoroethylene, polyester, polyurethane, etc.) on the metal stent, which retains the function of the metal stent and has the characteristics of the film material.During the operation, the femoral artery is incised, and then the guide wire replacement technology is used to establish an operation channel in the blood vessel, and then the delivery release device carries the vascular stent into the blood vessel along the guide wire.Under the traction of the guide wire, the delivery release device carrying the covered stent can pass through the iliac artery, abdominal aorta, thoracic aorta and other positions in sequence, and after reaching the designated position, the delivery release device releases the covered stent to the lesion site to reshape the blood vessel true lumen.After the blood vessel true lumen is reshaped, the delivery release device is withdrawn, and the operation is completed.

[0003] The existing covered stent delivery release device can generally realize slow release of covered stent and rapid release of covered stent, and the specific driving switching structure includes a fixed cylinder, a dial cylinder and a screw rod, a sliding groove is formed on the screw rod along its axial direction, the fixed cylinder is sleeved on the screw rod, a spring is sleeved on the fixed cylinder, grooves are formed on both sides of the fixed cylinder, and a support piece is arranged in each groove.Then, a threaded buckle is arranged in the groove to form a lever structure with the support piece as the fulcrum, and the position of the support piece can be changed by controlling the position of the spring and the support piece.The dial cylinder is also grooved, and the threaded buckle in the groove can connect the dial cylinder and the fixed cylinder.The covered stent is arranged in the catheter, the catheter is connected with the driving switching structure, and the sliding block on the catheter slides in the sliding groove to limit the circumferential movement of the catheter.In the initial position, the spring presses the threaded buckle, and one end of the threaded buckle is connected with the screw thread, so that the fixed cylinder and the dial cylinder can be driven to move axially along the screw rod by external force rotation, thereby driving the catheter to move and realizing slow release of the covered stent.When the dial cylinder is pushed to press the spring, the end of the threaded buckle is lifted and no longer connected with the screw thread, so that the catheter can be directly driven to move axially along the screw rod by external force, realizing rapid release of the covered stent.This delivery release device needs to control the dial cylinder to compress the spring at the same time to realize rapid release when operating, which is laborious and inconvenient, and the driving switching structure is too complex, difficult to manufacture and high in cost. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a kind of conveying release assembly, conveying release device and conveying release system to solve the structure operation of existing conveying release device is difficult and inconvenient, and driving switching structure is too complex, manufacturing difficulty is big, the problem of higher cost.

[0005] In a first aspect, the utility model provides a kind of conveying release assembly, comprising:

[0006] Handle mechanism, the handle mechanism includes: fixed handle and rotating handle, the fixed handle inside has first installation cavity, the rotating handle inside has second installation cavity, the rotating handle includes the connecting section and rotating section being connected, the connecting section is located in the first installation cavity, and is rotationally connected with the fixed handle, first sliding slot is set on the rotating section, and its inner wall has internal thread structure;

[0007] Driving switching mechanism, the driving switching mechanism includes: support body, rotating member, control member and conveying member, the support body is set in the handle mechanism, the rotating member and the conveying member are all set on the support body, the rotating member and the conveying member are all located in the rotating section, and the rotating member is located at the side of the conveying member close to the connecting section, the rotating member has external thread structure, the external thread structure is threadedly connected with the internal thread structure, the control member is rotationally set on the conveying member, and its operating part is located in the first sliding slot;

[0008] The conveying release assembly has the slow release state that rotating the rotating handle drives the rotating member to move along the axial direction of the support body and in turn drives the conveying member to move, and the quick release state that external force drives the operating part to directly drive the conveying member to move along the axial direction of the support body.

[0009] Advantages

[0010] The conveying release assembly can drive the conveying member to move slowly by rotating the rotating handle in a threaded cooperation manner, and can also drive the conveying member quickly by sliding the operating part of the control member in the first sliding slot. This conveying release assembly is more convenient to operate whether in slow release state or in quick release state, and the driving switching mechanism has a relatively simple structure, fewer components, low production difficulty and low production cost.

[0011] In an alternative embodiment, the delivery and release assembly further comprises a locking mechanism, which comprises a limiting groove formed on the rotating member, a limiting member arranged on the delivery member, and a release member slidingly arranged on the support body and located between the rotating member and the delivery member. The locking mechanism has a locking state in which one end of the limiting member away from the delivery member is clamped with the limiting groove, and an unlocking state in which the limiting member and the limiting groove are separated by sliding the release member. When the locking mechanism is in the locking state, the delivery and release assembly is in the slow release state, and when the locking mechanism is in the unlocking state, the delivery and release assembly is in the fast release state.

[0012] Advantages

[0013] By arranging the locking mechanism, the connection or separation of the rotating member and the delivery member can be achieved, so that the delivery and release assembly can be switched between the slow release state and the fast release state, preventing the operation part of the delivery member from being accidentally touched during use, driving the delivery member to move, and improving the use safety.

[0014] In an alternative embodiment, the limiting member comprises an extension and a clamping part. One end of the extension is connected with the delivery member, and the extension has a guide surface extending outward from the second mounting cavity from one end connected with the extension to the other end. The guide surface abuts against the release member. The clamping part is arranged at the other end of the extension and is arranged at an angle with the extension. The clamping part is adapted to be clamped to the limiting groove.

[0015] Advantages

[0016] When the release member moves, a force is applied to the guide surface, so that the clamping part is separated from the limiting groove, and the unlocking is achieved. This locking mechanism is simple and reliable in structure and easy to operate.

[0017] In an alternative embodiment, the guide surface is an arc surface.

[0018] In an alternative embodiment, the release member comprises an abutting part and a hand control part. The abutting part is arranged on the support body and abuts against the guide surface. The hand control part is connected with the abutting part and slidingly arranged in the first sliding groove.

[0019] In an alternative embodiment, the delivery and release assembly further comprises a safety mechanism, which comprises a safety groove and a safety bolt. A plurality of protrusions are arranged on the end face of the rotating segment near the fixed handle in a circumferential direction. The safety groove is formed between adjacent two protrusions. A second sliding groove is formed on the fixed handle. The safety bolt is slidingly arranged in the second sliding groove.

[0020] In an alternative embodiment, the safety latch comprises a plug block and a handle block, the handle block is slidably arranged on the mounting ring arranged on the inner wall of the fixed handle and is adapted to be plugged into the safety slot, the handle block is connected with the plug block and is located at the second sliding slot.

[0021] Advantages

[0022] After the safety latch is arranged, the safety latch is separated from the safety slot when the rotating handle needs to be rotated, and the safety latch is plugged into the safety slot to achieve locking when the rotating handle does not need to be operated, so that the rotation of the rotating handle is limited, and the rotating handle is prevented from being mistakenly operated in a non-use process such as transportation or carrying.

[0023] In a second aspect, the utility model also provides a conveying release device, including the conveying release component, still include: conveying sheath and guide head, the conveying sheath is connected with the conveying piece, and part pipe section of the conveying sheath is located in the conveying release component, and the other part pipe section extends from the fixed handle one end and goes out the conveying release component, the guide head is arranged in the one end of the conveying sheath that extends the conveying release component.

[0024] Advantages

[0025] Because the conveying release device comprises the conveying release component, the same effect as the conveying release component is not repeated here.

[0026] In an alternative embodiment, the conveying release device further comprises a pullback assembly, the pullback assembly comprises a fixed seat, a connecting piece and a driving piece, the fixed seat is arranged at one end of the rotating section away from the connecting section, the connecting piece is arranged in the conveying sheath, one end of the connecting piece is connected with the guide head, and the other end of the connecting piece is located in the fixed seat and is provided with the driving piece.

[0027] In a third aspect, the utility model also provides a conveying release system, including the conveying release device and the covered stent, the covered stent is arranged in the conveying sheath and is located at one end close to the guide head.

[0028] Advantages

[0029] Because the conveying release system comprises the conveying release device, the same effect as the conveying release device is not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0031] Figure 1 A schematic view of a delivery and release assembly of an embodiment of the present application;

[0032] Figure 2 A schematic view of the inside of the rotating handle in a delivery and release assembly (without a locking mechanism) of an embodiment of the present application;

[0033] Figure 3 An enlarged schematic view of the inside of the rotating handle in a delivery and release assembly (without a locking mechanism) of an embodiment of the present application;

[0034] Figure 4 A schematic view of the inside of the fixed handle in a delivery and release assembly of an embodiment of the present application;

[0035] Figure 5 An enlarged schematic view of the inside of the fixed handle in a delivery and release assembly of an embodiment of the present application;

[0036] Figure 6 A schematic view of the safety mechanism in a delivery and release assembly of an embodiment of the present application;

[0037] Figure 7 A schematic view of the inside of the rotating handle in a delivery and release assembly (with a locking mechanism) of an embodiment of the present application;

[0038] Figure 8 A sectional view of the inside of the rotating handle in a delivery and release assembly (with a locking mechanism) of an embodiment of the present application;

[0039] Figure 9 A schematic view of a delivery and release device of an embodiment of the present application;

[0040] Figure 10 A schematic view of a delivery and release system of an embodiment of the present application with the delivery sheath hidden;

[0041] Figure 11 A schematic view of a covered stent in a delivery and release system of an embodiment of the present application.

[0042] Explanation of reference signs:

[0043] 1、handle mechanism, 11, fixed handle, 111, mounting ring, 12, rotating handle, 121, connecting section, 122, rotating section, 1221, first sliding groove, 1222, internal thread structure, 1223, protrusion;

[0044] 2、drive switching mechanism, 21, support body, 211, carrier, 212, arc plate, 22, rotating member, 221, external thread structure, 23, control member, 231, operation part, 24, conveying member;

[0045] 31, limiting groove, 32, limiting member, 321, extension, 3211, guide surface, 322, clamping part, 33, release member, 331, abutting part, 332, hand control part;

[0046] 4, safety mechanism, 41, safety slot, 42, safety bolt, 421, plug block, 422, operating block;

[0047] 5, delivery sheath;

[0048] 6, guide head;

[0049] 71, fixed seat, 72, connecting member, 73 drive member;

[0050] 8, film covered stent. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0052] The embodiments of the present application will be described below in combination with Figures 1 to 11

[0053] ​According to the embodiment of the utility model, one kind provides a kind of conveying release assembly, conveying release assembly includes: handle mechanism 1 and drive switching mechanism 2.Handle mechanism 1 includes: fixed handle 11 and rotating handle 12, fixed handle 11 inside has first installation cavity, rotating handle 12 inside has second installation cavity, rotating handle 12 includes the connecting section 121 being connected and rotating section 122, connecting section 121 is located in first installation cavity, and is rotationally connected with fixed handle 11, rotating section 122 is provided with first sliding groove 1221, and its inner wall has internal thread structure 1222.Drive switching mechanism 2 includes: support body 21, rotating part 22, control piece 23 and conveying part 24, support body 21 is set in handle mechanism 1, rotating part 22 and conveying part 24 are all set on support body 21, rotating part 22 and conveying part 24 are all located in rotating section 122, and rotating part 22 is located in the side of conveying part 24 close to connecting section 121, rotating part 22 has external thread structure 221, external thread structure 221 is threadedly connected with internal thread structure 1222, control piece 23 is rotationally set on conveying part 24, and its operating part 231 is located in first sliding groove 1221;Conveying release assembly has rotating rotating handle 12 and drives rotating part 22 to move along the axial direction of support body 21 in turn and then drives conveying part 24 to move the slow release state, and external force drives operating part 231 to directly drive conveying part 24 to move along the axial direction of support body 21 in the quick release state.

[0054] As Figure 1 , Figure 4 , Figure 5 Indicated, fixed handle 11 both ends are open, but one end is closed, and the opening size is smaller, rotating handle 12 is inserted into the first installation cavity of fixed handle 11 from the other end.Rotating handle 12 in the part in first installation cavity, i.e. connecting section 121, rotating section 122 is provided with a plurality of guide rings along its axial direction, and a plurality of guide grooves are provided in first installation cavity, and guide rings are located in guide grooves.Rotating section 122 of rotating handle 12 outside first installation cavity, i.e. rotating section 122, medical staff can manually operate rotating section 122 to drive the whole rotating handle 12 to rotate, and guide ring and guide groove structure play the role of guiding and limiting.And the outer diameter of rotating section 122 is equal to the outer diameter of fixed handle 11, that is, the outer diameter of rotating section 122 is greater than the outer diameter of connecting section 121, and a stepped transition structure is formed at the joint of the two sections.Further, rotating handle 12 has second installation cavity inside, and second installation cavity is communicated with connecting section 121 and rotating section 122.In the inner wall of rotating section 122, a continuous internal thread structure 1222 is arranged, and a first sliding groove 1221 is arranged on the outer wall of rotating section 122, the extension direction of first sliding groove 1221 is parallel to the axial direction of rotating section 122, and first sliding groove 1221 is communicated with second installation cavity.

[0055] As Figure 2 ,Figure 3 As shown, the support body 21 includes two bearing bodies 211 and two oppositely arranged arc-shaped plates 212, the two bearing bodies 211 are respectively arranged at the two ends of the second mounting cavity, i.e. at the two ends of the rotating handle 12, and each bearing body 211 is provided with an arc-shaped groove matched with the arc-shaped plate 212, and the end of the arc-shaped plate 212 is inserted into the arc-shaped groove of the bearing body 211 to realize fixation. There is also a mounting space between the two arc-shaped plates 212 for subsequent arrangement of the delivery sheath 5. Further, the rotating member 22 and the delivery member 24 are also correspondingly provided with arc-shaped grooves to realize connection with the arc-shaped plates 212 through the arc-shaped grooves. And the outer wall of the rotating member 22 is provided with a continuous external thread structure 221, which can be threadedly connected with the internal thread structure 1222 of the rotating section 122. In this way, the rotating member 22 can be driven to move along the axial direction of the support body 21 by rotating the rotating section 122. According to the usual use mode of the device, the rotating member 22 is arranged on the side of the delivery member 24 close to the connecting section 121, that is, during use of the device, the delivery member 24 can be driven to move away from the connecting section 121 by the rotating member 22. The main body structure of the delivery member 24 is in a cylindrical shape and is concentrically arranged with the rotating member 22, and the delivery sheath 5 can be connected with the delivery member 24. And the delivery member 24 is provided with a mounting groove, and the control member 23 can be sleeved on the mounting groove to realize connection with the delivery member 24. The operation part 231 of the control member 23 extends from the second mounting cavity to the first sliding groove 1221, and when the rotating handle 12 is rotated, the control member 23 will rotate with it, but the delivery member 24 will not rotate. Directly pushing the operation part 231 can drive the delivery member 24 to move along the axial direction of the support body 21. The number of operation parts 231 can be one or more, and in this embodiment, two operation parts 231 are arranged, and the number of first sliding grooves 1221 is consistent with the number of operation parts 231. In addition, the rotating member 22, the control member 23 and the delivery member 24 can all move along the axial direction of the support body 21, but their movement ranges are all located in the part of the second mounting cavity corresponding to the rotating section 122.

[0056] The delivery and release assembly has two operating states according to the use requirement, one is slow release state, i.e. the medical staff rotates the rotating handle 12, and since the internal thread structure 1222 in it cooperates with the external thread structure 221 on the rotating member 22, the rotating member 22 will be driven to move away from the connecting section 121, and the control member 23 will also rotate with the rotating handle 12. The rotating member 22 moves to push the delivery member 24 to move in the same direction, and since the cooperation of the threads, the movement speed of the delivery member 24 is slow, but the position control is more accurate; the other is fast release state, i.e. the delivery member 24 is not driven by the rotating member 22, but is directly forced on the operation part 231 of the control member 23 to push the delivery member 24 to move away from the connecting section 121, at this time, not limited by the thread cooperation, the delivery member 24 can slide along the support body 21 quickly, and the movement speed is fast.

[0057] The delivery and release assembly has two operating states, which can meet the needs of medical staff in actual work. The two operating states are convenient to switch, and are easy to operate, simple and comfortable to use in either state. In addition, the driving switching mechanism 2 has a simpler structure, and is relatively low in production difficulty and manufacturing cost.

[0058] In some embodiments, the delivery and release assembly further comprises a locking mechanism, which comprises a limiting groove 31, a limiting piece 32 and a release piece 33. The limiting groove 31 is formed on the rotating piece 22, the limiting piece 32 is arranged on the delivery piece 24, and the release piece 33 is slidingly arranged on the support body 21 and located between the rotating piece 22 and the delivery piece 24. The locking mechanism has a locking state in which one end of the limiting piece 32 away from the delivery piece 24 is clamped with the limiting groove 31, and an unlocking state in which the limiting piece 32 and the limiting groove 31 are separated by sliding the release piece 33. When the locking mechanism is in the locking state, the delivery and release assembly is in the slow release state, and when the locking mechanism is in the unlocking state, the delivery and release assembly is in the fast release state.

[0059] Specifically, as shown in Figure 7 、 Figure 8 The limiting groove 31 can be formed on the inner side of the rotating piece 22, one end of the limiting piece 32 is connected with the delivery piece 24, and the other end can be clamped with the limiting groove 31. When the limiting piece 32 is clamped with the limiting groove 31, i.e. the rotating piece 22 and the delivery piece 24 are connected as a whole, at this time the operation part 231 of the delivery piece 24 cannot be directly driven to move quickly, i.e. the locking mechanism is in the locking state, and the entire delivery and release assembly is in the slow release state, which can only be driven by rotating the handle 12 to drive the delivery piece 24 to move slowly. The number of limiting grooves 31 and limiting pieces 32 is consistent, and in this embodiment, two limiting grooves 31 and two limiting pieces 32 are provided, and in other embodiments, one or more limiting grooves 31 and limiting pieces 32 can be provided. The release piece 33 arranged between the rotating piece 22 and the delivery piece 24 can separate the two, thereby unlocking the locking mechanism to the unlocking state, at this time the rotating piece 22 and the delivery piece 24 are separated from each other, and the operation part 231 of the delivery piece 24 can be directly driven to move quickly, and the entire delivery and release assembly is in the fast release state which can directly drive the delivery piece 24 to move quickly. Of course, in other embodiments, the locking mechanism can not be provided.

[0060] The provision of the locking mechanism can improve the safety of the delivery and release assembly in use, and only when the delivery piece 24 needs to be moved quickly, the locking mechanism is unlocked to prevent accidents caused by accidental touching of the operation part 231 of the delivery piece 24 to drive the delivery piece 24 to move quickly at other times.

[0061] In some embodiments, the limiting member 32 comprises an extending portion 321 and a clamping portion 322, one end of the extending portion 321 is connected with the conveying member 24, and the extending portion 321 has a guide surface 3211 extending from the end connected with the extending portion 321 to the outside of the second mounting cavity, the guide surface 3211 abuts against the releasing member 33, and the clamping portion 322 is arranged at the other end of the extending portion 321 and is arranged at an angle with the extending portion 321, and the clamping portion 322 is adapted to be clamped to the limiting groove 31.

[0062] Specifically, one end of the extending portion 321 is connected with the conveying member 24, and the other end is provided with the clamping portion 322. The extending portion 321 itself is inclined, that is, the position where the extending portion 321 and the clamping portion 322 are connected is not at the same height as the position where the extending portion 321 and the conveying member 24 are connected, but the position where the extending portion 321 and the clamping portion 322 are connected is more outward, and the position where the extending portion 321 and the conveying member 24 are connected is more inward, as shown in the extending portion 321 or the end of the limiting member 32 is in a raised state. Correspondingly, the guide surface 3211 of the extending portion 321, that is, its upper surface, is consistent with the inclination direction of itself. The clamping portion 322 is arranged at an angle with the extending portion 321 to be clamped with the limiting groove 31. Figure 4

[0063] In one embodiment, the guide surface 3211 is an arc surface.

[0064] The guide surface 3211 can be an arc surface, and the arc structure has a good guiding effect. When the releasing member 33 moves along the arc surface to the side close to the rotating member 22, the extending portion 321 can be pressed down to separate the clamping portion 322 from the limiting groove 31 to achieve unlocking.

[0065] In other embodiments, the guide surface 3211 can also be an inclined plane.

[0066] In some embodiments, the releasing member 33 comprises an abutting portion 331 and a hand control portion 332, the abutting portion 331 is arranged on the support body 21 and abuts against the guide surface 3211, and the hand control portion 332 is connected with the abutting portion 331 and is slidingly arranged in the first sliding groove 1221.

[0067] ​The shape of the releasing member 33 is similar to that of the conveying member 24. Specifically, the abutting portion 331 of the releasing member 33 is approximately cylindrical in shape, is arranged on the support body 21, and can slide along the support body 21. The inner wall surface of the abutting portion 331 abuts against the guide surface 3211, so that a force can be applied to the guide surface 3211 during the movement of the abutting portion 331, thereby serving to press down the limiting member 32. In order to facilitate the control of the movement of the abutting portion 331, the hand control portion 332 is arranged on the abutting portion 331. The hand control portion 332 can be slidingly arranged in the first sliding groove 1221, or a groove can be additionally formed on the rotating section 122, and the hand control portion 332 can be slidingly arranged in the additionally formed groove.

[0068] In the initial position, the releasing member 33 abuts against the conveying member 24, and at this time, the limiting member 32 is clamped with the limiting groove 31, i.e., the locking mechanism is in the locked state. During use, if it is required to rapidly drive the conveying member 24, the hand control portion 332 is pushed to move the abutting portion 331 to one side of the rotating member 22. During the movement, the abutting portion 331 gradually presses down the limiting member 32, so that the limiting member 32 is separated from the limiting groove 31, and the locking mechanism is in the unlocked state.

[0069] In some embodiments, the conveying and releasing assembly further comprises a safety mechanism 4, which comprises a safety groove 41 and a safety bolt 42. A plurality of protrusions 1223 are arranged on the end surface of the rotating section 122 adjacent to the fixed handle 11 and are spaced apart in the circumferential direction. A safety groove 41 is formed between every two adjacent protrusions 1223. A second sliding groove is formed in the fixed handle 11, and the safety bolt 42 is slidingly arranged in the second sliding groove.

[0070] A stepped transition structure is formed at the joint between the connecting section 121 and the rotating section 122 of the rotating handle 12. A circle of protrusions 1223 are uniformly arranged on the end surface of the rotating section 122 at the joint. A safety groove 41 is formed between every two adjacent protrusions 1223. When the safety bolt 42 is inserted into the safety groove 41, the rotation of the rotating handle 12 can be limited. That is, the rotating handle 12 needs to be first unlocked by opening the safety mechanism 4, so that the safety bolt 42 is separated from the safety groove 41. The arrangement of the safety mechanism 4 can avoid the erroneous operation of the rotating handle 12 during the non-use process such as transportation or carrying of the conveying and releasing assembly.

[0071] In one embodiment, the safety bolt 42 comprises a plug block 421 and a control block 422. The control block 422 is slidingly arranged on the mounting ring 111 arranged on the inner wall of the fixed handle 11, is adapted to be plugged into the safety groove 41, is connected with the plug block 421, and is located at the second sliding groove.

[0072] Specifically, as shown in FIG. 6, the plug block 421 is arranged on the control block 422, and the control block 422 is slidingly arranged on the mounting ring 111. Figure 6As shown, the safety latch 42 comprises a plug block 421 and a handle block 422, the shape of the handle block 422 is similar to that of the operation part 231. A mounting ring 111 is arranged in the fixed handle 11, that is, in the first mounting cavity, a slot is formed in the mounting ring 111 along the axial direction, the plug block 421 is slidingly arranged in the slot, and the handle block 422 can drive the plug block 421 to slide in the slot. In order to facilitate the plug block 421 to be inserted into the safety slot 41, the end of the plug block 421 can be wedge-shaped to better guide the plug block 421 to cooperate with the safety slot 41.

[0073] According to the embodiment of the utility model, as Figure 9 As shown, on the other hand, a delivery release device is also provided, which comprises the delivery release assembly in the above-mentioned embodiments, and further comprises a delivery sheath 5 and a guide head 6, the delivery sheath 5 is connected with the delivery part 24, and part of the delivery sheath 5 is located in the delivery release assembly, and the other part of the delivery sheath 5 extends out of the delivery release assembly from one end of the fixed handle 11, and the guide head 6 is arranged at one end of the delivery sheath 5 extending out of the delivery release assembly.

[0074] The length of the delivery sheath 5 is greater than that of the delivery release assembly, so that part of the delivery sheath 5 is located in the delivery release assembly and is located on the inner side of the support body 21, and the other part of the delivery sheath 5 is located outside the delivery release assembly and extends out of one end of the fixed handle 11. The arrangement of the guide head 6 facilitates guiding the delivery release device to reach the lesion.

[0075] In some embodiments, the delivery release device further comprises a pullback assembly, the pullback assembly comprises a fixing seat 71, a connecting part 72 and a driving part 73, the fixing seat 71 is arranged at one end of the rotating section 122 away from the connecting section 121, the connecting part 72 is arranged in the delivery sheath 5 and is connected with the guide head 6 at one end and located in the fixing seat 71 at the other end, and the driving part 73 is arranged in the fixing seat 71.

[0076] After the delivery and release of the covered stent 8 are completed, the guide head 6 is to be removed, so that the guide head 6 can be pulled out through the pullback assembly. Specifically, the fixing seat 71 is arranged at the tail of the delivery release device, that is, at one end of the rotating section 122 away from the connecting section 121. The fixing seat 71 is internally arranged in the middle and a third sliding groove is formed in the fixing seat 71. The diameter of the connecting part 72 is smaller than that of the delivery sheath 5, the connecting part 72 is arranged in the delivery sheath 5 and is connected with the guide head 6 at one end and located in the fixing seat 71 at the other end. The driving part 73 is arranged in the fixing seat 71, the driving part 73 can slide in the third sliding groove, and the connecting part 72 and the guide head 6 can be gradually pulled out by controlling the driving part 73.

[0077] According to the embodiment of the utility model, as Figure 10As shown, the delivery and release system further comprises a stent 8, which is arranged in the delivery sheath 5 and is located at the end close to the guide head 6.

[0078] Specifically, as shown in the drawings, Figure 11 The stent 8 comprises a framework and a covering film, and the framework has a pre-release part at one end, and the rest of the framework is covered with the covering film. The stent 8 is arranged in the delivery sheath 5, and the pre-release part of the stent 8 abuts against the guide head 6.

[0079] The working process of the delivery and release system is described as follows:

[0080] The delivery and release system is guided to the lesion site by the guide head 6, and then the delivery sheath 5 is moved to the side close to the fixed handle 11 by controlling the delivery and release assembly, so that the stent 8 is gradually released. There are two optional control modes in this process, namely slow release and fast release. The slow release is achieved by rotating the rotating handle 12 to drive the delivery part 24 to move through the rotating part 22, and then to drive the delivery sheath 5 to move slowly. The fast release is achieved by directly driving the delivery part 24 to slide quickly through the control part 23, and then driving the delivery sheath 5 to move quickly. Of course, in order to achieve fast release, the locking mechanism needs to be unlocked first, so that the rotating part 22 and the delivery part 24 are separated.

[0081] When the stent 8 is released, the guide head 6 is pulled back by the pull-back assembly, and the entire delivery and release device can be removed.

[0082] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A delivery release assembly characterized by, The utility model relates to a handle mechanism (1), the handle mechanism (1) includes: fixed handle (11) and rotating handle (12), the fixed handle (11) has the first installation cavity inside, the rotating handle (12) has the second installation cavity inside, the rotating handle (12) includes the connecting section (121) and rotating section (122) of connection, the connecting section (121) is located in the first installation cavity, and is rotatably connected with the fixed handle (11), the rotating section (122) is provided with the first sliding groove (1221) and has the internal thread structure (1222) on its inner wall. The utility model relates to a drive switching mechanism (2), the drive switching mechanism (2) includes: support body (21), rotating part (22), control part (23) and conveying part (24), the support body (21) is arranged in the handle mechanism (1), the rotating part (22) and the conveying part (24) are all arranged on the support body (21), the rotating part (22) and the conveying part (24) are all located in the rotating section (122), and the rotating part (22) is located on the conveying part (24) side close to the connecting section (121), the rotating part (22) has the external thread structure (221), the external thread structure (221) is threadedly connected with the internal thread structure (1222), the control part (23) is rotatably arranged on the conveying part (24), and its operating part (231) is located in the first sliding groove (1221). The conveying release assembly has a slow release state that rotating the rotating handle (12) drives the rotating part (22) to move along the axial direction of the support body (21) and in turn drives the conveying part (24) to move, and a quick release state that external force drives the operating part (231) to directly drive the conveying part (24) to move along the axial direction of the support body (21). The utility model further includes a locking mechanism, the locking mechanism includes: limiting groove (31), limiting part (32) and release part (33), the limiting groove (31) is formed on the rotating part (22), the limiting part (32) is arranged on the conveying part (24), the release part (33) is slidably arranged on the support body (21) and located between the rotating part (22) and the conveying part (24), the locking mechanism has a locking state that one end of the limiting part (32) away from the conveying part (24) is clamped with the limiting groove (31) and an unlocking state that the limiting part (32) and the limiting groove (31) are separated by sliding the release part (33), and when the locking mechanism is in the locking state, the conveying release assembly is in the slow release state, and when the locking mechanism is in the unlocking state, the conveying release assembly is in the quick release state.

2. The delivery release assembly of claim 1, wherein, ​ 3. The delivery release assembly of claim 2, wherein, The limiting piece (32) comprises an extension part (321) and a clamping part (322), one end of the extension part (321) is connected with the conveying piece (24), and the extension part (321) has a guide surface (3211) extending from one end connected with the extension part (321) to the other end to the outside of the second mounting cavity, the guide surface (3211) abuts against the releasing piece (33), and the clamping part (322) is arranged at the other end of the extension part (321) and is arranged at an angle with the extension part (321), and the clamping part (322) is suitable for being clamped to the limiting groove (31).

4. The delivery release assembly of claim 3, wherein, The guide surface (3211) is an arc surface.

5. A delivery release assembly according to claim 3 or 4, wherein, The releasing piece (33) comprises an abutting part (331) and a manual control part (332), the abutting part (331) is arranged on the support body (21) and abuts against the guide surface (3211), and the manual control part (332) is connected with the abutting part (331) and is slidingly arranged in the first sliding groove (1221).

6. The delivery release assembly of claim 1, wherein, Further comprising a safety mechanism (4), the safety mechanism (4) comprises a safety slot (41) and a safety bolt (42), a plurality of protrusions (1223) are arranged on the end face of the rotating section (122) near one side of the fixed handle (11) and are spaced apart in the circumferential direction, the safety slot (41) is formed between two adjacent protrusions (1223), a second sliding groove is formed in the fixed handle (11), and the safety bolt (42) is slidingly arranged in the second sliding groove.

7. The delivery release assembly of claim 6, wherein, The safety bolt (42) comprises a plug block (421) and a control block (422), the control block (422) is slidingly arranged on the mounting ring (111) arranged on the inner wall of the fixed handle (11) and is suitable for being plugged into the safety slot (41), the control block (422) is connected with the plug block (421) and is located at the second sliding groove.

8. A delivery release device comprising the delivery release assembly of any one of claims 1-7, wherein, Further comprising: a conveying sheath (5) and a guide head (6), the conveying sheath (5) is connected with the conveying piece (24), part of the pipe section of the conveying sheath (5) is located in the conveying and releasing assembly, and the other part of the pipe section extends out of the conveying and releasing assembly from one end of the fixed handle (11), and the guide head (6) is arranged at one end of the conveying sheath (5) extending out of the conveying and releasing assembly.

9. The delivery release device of claim 8, wherein, Further comprising a pulling back assembly, the pulling back assembly comprises a fixed seat (71), a connecting piece (72) and a driving piece (73), the fixed seat (71) is arranged at one end of the rotating section (122) away from the connecting section (121), the connecting piece (72) is arranged in the conveying sheath (5) and one end of the connecting piece (72) is connected with the guide head (6) and the other end of the connecting piece (72) is located in the fixed seat (71) and is provided with the driving piece (73).

10. A delivery release system characterized by, The conveying and releasing device comprises the conveying and releasing device according to any one of claims 8 or 9 and a covered stent (8), the covered stent (8) is arranged in the conveying sheath (5) and is located at one end close to the guide head (6).

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