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

Abstract

The invention 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 present invention relates to the technical field of medical devices, and in particular to a delivery release component, a delivery release device and a delivery release system. Background Art

[0002] A covered stent is a medical device for treating aortic diseases. It is mainly used for the treatment of aortic dissection, intramural hematoma, aortic sinus rupture and other diseases. A covered stent is a stent coated with a special membrane material (polytetrafluoroethylene, dacron, polyester, polyurethane, etc.) on a metal stent. It retains the function of a metal stent and has the characteristics of a membrane material. During the operation, the femoral artery is cut open, and then a surgical channel is established in the blood vessel using a guide wire replacement technique. Then the delivery and release device carries the vascular stent into the blood vessel along the guide wire. Under the traction of the guide wire, the delivery and release device carries the covered stent and can pass through the iliac artery, abdominal aorta, thoracic aorta and other positions in turn. After reaching the designated position, the delivery and release device releases the covered stent to the lesion position to reshape the true lumen of the blood vessel. After the true lumen of the blood vessel is reshaped, the delivery and release device is withdrawn and the operation is completed.

[0003] Existing stent graft delivery and release devices can generally achieve slow release of stent grafts and rapid release of stent grafts. The specific drive switching structure includes: a fixed cylinder, a toggle cylinder and a screw. The screw with an external thread is provided with a slide groove along its axial direction. The fixed cylinder is sleeved on the screw. A spring is sleeved on the fixed cylinder. Grooves are also provided on both sides of the fixed cylinder. A support member is provided in each groove. Then, the threaded buckle is provided in the groove to form a lever structure with the support member as a fulcrum. By controlling the action of the spring and the position of the support member, the tilting state of the support member can be changed. The toggle cylinder is also grooved. The threaded buckle is located in the groove to connect the toggle cylinder with the fixed cylinder. The stent graft is provided in a catheter, the catheter is connected to the drive switching structure, and the slider on the catheter slides in the slide groove to limit the movement of the catheter circumferentially. In the initial position, the spring compresses the threaded buckle, so that one end of the threaded buckle is connected to the screw thread. At this time, the fixed cylinder and the toggle cylinder can be driven to move along the axial direction of the screw by external force rotation, thereby driving the catheter to move and achieve slow release of the stent graft; when the toggle cylinder is pushed, the toggle cylinder squeezes the spring, the end of the threaded buckle is tilted and no longer connected to the screw thread, and the catheter can be directly driven by external force to move along the axial direction of the screw to achieve rapid release of the stent graft. When operating this delivery and release device, if you want to release quickly, you also need to control the toggle cylinder to compress the spring at the same time, which is laborious and inconvenient to operate, and the drive switching structure is too complicated, difficult to manufacture, and costly. Summary of the invention

[0004] In view of this, the present invention provides a conveying release assembly, a conveying release device and a conveying release system to solve the problems that the existing conveying release device structure is laborious and inconvenient to operate, and the drive switching structure is too complicated, difficult to manufacture and costly.

[0005] In a first aspect, the present invention provides a delivery release assembly, comprising:

[0006] A handle mechanism, the handle mechanism comprising: a fixed handle and a rotating handle, the fixed handle having a first mounting cavity inside, the rotating handle having a second mounting cavity inside, the rotating handle comprising a connecting section and a rotating section connected to each other, the connecting section being located in the first mounting cavity and rotatably connected to the fixed handle, the rotating section being provided with a first sliding groove, and its inner wall having an internal thread structure;

[0007] A drive switching mechanism, the drive switching mechanism comprising: a support body, a rotating member, a control member and a conveying member, the support body is arranged in the handle mechanism, the rotating member and the conveying member are both arranged on the support body, the rotating member and the conveying member are both located in the rotating section, and the rotating member is located on a side of the conveying member close to the connecting section, the rotating member has an external thread structure, the external thread structure is threadedly connected with the internal thread structure, the control member is rotatably arranged on the conveying member, and its operating part is located in the first slide groove;

[0008] The conveying release assembly has a slow release state in which the rotating handle is rotated to drive the rotating member to move axially along the support body and then drive the conveying member to move, and a fast release state in which an external force drives the operating part to directly drive the conveying member to move axially along the support body.

[0009] Beneficial Effects

[0010] The conveying release assembly can drive the conveying member to move slowly by rotating the rotating handle in a threaded manner, and can also realize rapid driving of the conveying member by sliding the operating part of the operating control member in the first slide groove. This conveying release assembly is convenient to operate whether in a slow release state or a fast release state, and the structure of the drive switching mechanism is relatively simple, with fewer parts, low production difficulty, and low production cost.

[0011] In an optional embodiment, the conveying release assembly also includes a locking mechanism, which includes: a limit groove, a limit piece and a release piece, the limit groove is formed on the rotating piece, the limit piece is arranged on the conveying piece, the release piece is slidably arranged on the support body, and is located between the rotating piece and the conveying piece, the locking mechanism has a locking state in which the end of the limit piece away from the conveying piece is engaged with the limit groove and an unlocking state in which the limit piece and the limit groove are separated by sliding the release piece, and when the locking mechanism is in the locked state, the conveying release assembly is in the slow release state, and when the locking mechanism is in the unlocked state, the conveying release assembly is in the quick release state.

[0012] Beneficial Effects

[0013] By setting up a locking mechanism, the connection or separation of the rotating part and the conveying part can be achieved, so that the conveying release assembly can be switched between a slow release state and a fast release state, preventing the operating part of the conveying part from being accidentally touched during use, causing the conveying part to move, thereby improving safety in use.

[0014] In an optional embodiment, the limiting member includes: an extension portion and a clamping portion, one end of the extension portion is connected to the conveying member, and the extension portion has a guide surface, the guide surface extends from one end connected to the extension portion to the other end toward the outside of the second mounting cavity, the guide surface abuts against the release member, the clamping portion is arranged at the other end of the extension portion, and is arranged at an angle to the extension portion, and the clamping portion is suitable for clamping into the limiting groove.

[0015] Beneficial Effects

[0016] When the release member moves, it will exert a force on the guide surface, thereby separating the clamping portion from the limiting groove to achieve unlocking. This locking mechanism has a simple and reliable structure and is easy to operate.

[0017] In an optional embodiment, the guide surface is a curved surface.

[0018] In an optional embodiment, the release member includes: an abutment portion and a manual control portion, the abutment portion is arranged on the support body and abuts against the guide surface, and the manual control portion is connected to the abutment portion and is slidably arranged in the first sliding groove.

[0019] In an optional embodiment, the conveying release assembly also includes a safety mechanism, which includes: a safety groove and a safety pin, a plurality of protrusions are arranged on the end surface of the rotating section close to the fixed handle along its circumferential interval, and the safety groove is formed between two adjacent protrusions, and a second slide groove is opened on the fixed handle, and the safety pin is slidably set in the second slide groove.

[0020] In an optional embodiment, the safety latch includes: a plug-in block and a manipulation block, the manipulation block is slidably disposed on a mounting ring disposed on the inner wall of the fixed handle and is suitable for being plugged into the safety slot, the manipulation block is connected to the plug-in block and is located at the second slide slot.

[0021] Beneficial Effects

[0022] After the safety pin is set, when the rotating handle needs to be turned, the safety pin is separated from the safety slot. When the rotating handle does not need to be operated, the safety pin is inserted into the safety slot to lock it, thereby limiting the rotation of the rotating handle and avoiding accidental operation of the rotating handle during non-use processes such as transportation or handling.

[0023] In the second aspect, the present invention also provides a delivery release device, including the delivery release assembly, and also including: a delivery sheath and a guide head, the delivery sheath is connected to the delivery member, and a partial section of the delivery sheath is located in the delivery release assembly, and another partial section extends out of the delivery release assembly from one end of the fixed handle, and the guide head is arranged at one end of the delivery sheath extending out of the delivery release assembly.

[0024] Beneficial Effects

[0025] Because the delivery release device includes a delivery release component, which has the same effect as the delivery release component, it will not be described in detail here.

[0026] In an optional embodiment, the delivery release device also includes a pullback assembly, which includes: a fixed seat, a connecting member and a driving member, wherein the fixed seat is arranged at one end of the rotating section away from the connecting section, the connecting member is arranged in the delivery sheath, and one end is connected to the guide head, and the other end is located in the fixed seat and is provided with the driving member.

[0027] In a third aspect, the present invention further provides a delivery and release system, comprising the delivery and release device and a coated stent, wherein the coated stent is disposed in the delivery sheath and is located near one end of the guide head.

[0028] Beneficial Effects

[0029] Because the conveying release system includes a conveying release device, which has the same effect as the conveying release device, it will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of a delivery and release assembly according to an embodiment of the present invention;

[0032] Figure 2 It is a schematic diagram of the interior of a rotating handle in a delivery release assembly (without a locking mechanism) according to an embodiment of the present invention;

[0033] Figure 3 It is an enlarged schematic diagram of the interior of a rotating handle in a delivery release assembly (without a locking mechanism) according to an embodiment of the present invention;

[0034] Figure 4 It is a schematic diagram of the interior of a fixed handle in a delivery and release assembly according to an embodiment of the present invention;

[0035] Figure 5 It is an enlarged schematic diagram of the interior of a fixed handle in a delivery and release assembly according to an embodiment of the present invention;

[0036] Figure 6 It is a schematic diagram of a safety mechanism in a delivery release assembly according to an embodiment of the present invention;

[0037] Figure 7 It is a schematic diagram of the interior of a rotating handle in a delivery release assembly (with a locking mechanism) according to an embodiment of the present invention;

[0038] Figure 8 It is a cross-sectional view of the interior of a rotating handle in a delivery release assembly (with a locking mechanism) according to an embodiment of the present invention;

[0039] Fig. 9 A schematic diagram of a delivery and release device according to an embodiment of the present invention;

[0040] Fig.10 A schematic diagram of a delivery and release system according to an embodiment of the present invention, wherein the delivery sheath is hidden;

[0041] Fig.11 A schematic diagram of a stent graft in a delivery and release system according to an embodiment of the present invention.

[0042] Description of reference numerals:

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

[0044] 2. drive switching mechanism, 21. support body, 211. bearing body, 212. arc plate, 22. rotating member, 221. external thread structure, 23. control member, 231. operating unit, 24. conveying member;

[0045] 31. limiting groove, 32. limiting member, 321. extending portion, 3211. guiding surface, 322. clamping portion, 33. releasing member, 331. abutting portion, 332. manual control portion;

[0046] 4. insurance mechanism, 41. insurance slot, 42. insurance latch, 421. plug-in block, 422. operating block;

[0047] 5. Delivery sheath;

[0048] 6. Guide head;

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

[0050] 8. Covered stent. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0052] Combine the following Figures 1 to 11 , describing an embodiment of the present invention.

[0053] According to an embodiment of the present invention, on the one hand, a delivery release assembly is provided, and the delivery release assembly includes: a handle mechanism 1 and a drive switching mechanism 2. The handle mechanism 1 includes: a fixed handle 11 and a rotating handle 12, the fixed handle 11 has a first installation cavity inside, the rotating handle 12 has a second installation cavity inside, the rotating handle 12 includes a connecting section 121 and a rotating section 122 connected to each other, the connecting section 121 is located in the first installation cavity, and is rotatably connected to the fixed handle 11, and a first sliding groove 1221 is provided on the rotating section 122, and its inner wall has an internal thread structure 1222. The drive switching mechanism 2 includes: a support body 21, a rotating member 22, a control member 23 and a conveying member 24. The support body 21 is arranged in the handle mechanism 1, and the rotating member 22 and the conveying member 24 are both arranged on the support body 21. The rotating member 22 and the conveying member 24 are both located in the rotating section 122, and the rotating member 22 is located on the side of the conveying member 24 close to the connecting section 121. The rotating member 22 has an external thread structure 221, and the external thread structure 221 is threadedly connected with the internal thread structure 1222. The control member 23 is rotatably arranged on the conveying member 24, and its operating part 231 is located in the first slide groove 1221; the conveying release component has a slow release state in which the rotating handle 12 is rotated to drive the rotating member 22 to move axially along the support body 21 and then drive the conveying member 24 to move, and a fast release state in which the external force drives the operating part 231 to directly drive the conveying member 24 to move axially along the support body 21.

[0054] like Figure 1 , Figure 4 , Figure 5 As shown, both ends of the fixed handle 11 are open, but one end is closed and has a smaller opening size, and the rotating handle 12 extends from the other end into the first installation cavity of the fixed handle 11. The part of the rotating handle 12 located in the first installation cavity is the connecting section 121, and a plurality of guide rings are arranged along the axial intervals on the rotating section 122, corresponding to a plurality of guide grooves arranged in the first installation cavity, and the guide rings are located in the guide grooves. The part of the rotating handle 12 located outside the first installation cavity is the rotating section 122, and the medical staff can manually operate the rotating section 122 to drive the entire rotating handle 12 to rotate, and the guide ring and the guide groove structure play the role of guiding and limiting. And the outer diameter of the rotating section 122 is equal to the outer diameter of the fixed handle 11, that is, the outer diameter of the rotating section 122 is greater than the outer diameter of the connecting section 121, and a step-shaped transition structure is formed at the intersection of the two sections. Further, the rotating handle 12 has a second installation cavity inside, and the second installation cavity communicates with the connecting section 121 and the rotating section 122. A continuous internal thread structure 1222 is provided on the inner wall of the rotating section 122, and a first slide groove 1221 is provided on the outer wall of the rotating section 122. The extension direction of the first slide groove 1221 is parallel to the axial direction of the rotating section 122, and the first slide groove 1221 is connected to the second installation cavity.

[0055] like Figure 2 , Figure 3 As shown, the support body 21 includes two bearing bodies 211 and two arc-shaped plates 212 arranged opposite to each other. The two bearing bodies 211 are respectively arranged at the two ends of the second installation cavity, that is, at the two ends of the rotating handle 12. Each corresponding bearing body 211 is provided with an arc-shaped groove matching 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 achieve fixation. There is also an installation space between the two arc-shaped plates 212 for the subsequent setting of the conveying sheath 5. Furthermore, the rotating member 22 and the conveying member 24 are also correspondingly provided with arc-shaped grooves, and are connected to 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 matched with the internal thread structure 1222 of the rotating section 122. In this way, by rotating the rotating section 122, the rotating member 22 can be driven to move along the axial direction of the support body 21. According to the conventional use of the device, the rotating member 22 is arranged on the side of the conveying member 24 close to the connecting section 121, that is, during the use of the device, the conveying member 24 can be driven by the rotating member 22 to move to the side away from the connecting section 121. The main structure of the conveying member 24 is cylindrical, and is arranged concentrically with the rotating member 22, and the conveying sheath 5 can be connected to the conveying member 24. In addition, a mounting groove is arranged on the conveying member 24, and the control member 23 can be sleeved at the mounting groove to achieve connection with the conveying member 24. The operating part 231 of the control member 23 extends from the second mounting cavity to the first slide groove 1221. When the rotating handle 12 rotates, the control member 23 will rotate accordingly, but the conveying member 24 will not rotate. Directly pushing the operating part 231 can drive the conveying member 24 to move along the axial direction of the support body 21. The number of operating parts 231 can be one or more. In this embodiment, two operating parts 231 are provided, and the number of first slide grooves 1221 must be consistent with the number of operating parts 231. In addition, the rotating member 22 , the control member 23 and the conveying member 24 can all move along the axial direction of the supporting body 21 , but their movement ranges are all located in the portion of the second installation cavity corresponding to the rotating section 122 .

[0056] The delivery release assembly has two operating states according to the use requirements. One is a slow release state, that is, the medical staff rotates the rotating handle 12. Since the internal internal thread structure 1222 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 synchronous control member 23 will also rotate with the rotating handle 12. When the rotating member 22 moves, it will push the delivery member 24 to move in the same direction. Due to the cooperation of the thread, the movement speed of the delivery member 24 is slow, but its position control is more accurate; the other is a fast release state, that is, the delivery member 24 is not driven by the rotating member 22, but directly applies force to the operating part 231 of the control member 23 to push the delivery member 24 to move away from the connecting section 121. At this time, it is not restricted by the thread cooperation, and the delivery member 24 can slide quickly along the support body 21, and the movement speed is fast.

[0057] This delivery release assembly has two operating states, which can meet the needs of medical staff in actual work. The two operating states are easy to switch, and no matter which operating state is used, the operation is convenient and simple, and the comfort of use is higher. In addition, the structure of the drive switching mechanism 2 is simpler, the difficulty of production is relatively low, and the corresponding manufacturing cost is also relatively low.

[0058] In some embodiments, the conveying release assembly also includes a locking mechanism, which includes: a limit groove 31, a limit member 32 and a release member 33. The limit groove 31 is formed on the rotating member 22, the limit member 32 is arranged on the conveying member 24, and the release member 33 is slidably arranged on the support body 21 and is located between the rotating member 22 and the conveying member 24. The locking mechanism has a locking state in which the end of the limit member 32 away from the conveying member 24 is engaged with the limit groove 31 and an unlocking state in which the limit member 32 and the limit groove 31 are separated by sliding the release member 33, and when the locking mechanism is in the locked state, the conveying release assembly is in a slow release state, and when the locking mechanism is in the unlocked state, the conveying release assembly is in a quick release state.

[0059] Specifically, Figure 7 , Figure 8 As shown, the limiting groove 31 can be formed on the inner side of the rotating member 22, one end of the limiting member 32 is connected to the conveying member 24, and the other end can be engaged with the limiting groove 31. When the limiting member 32 is engaged with the limiting groove 31, that is, the rotating member 22 and the conveying member 24 are connected as a whole, at this time, the operating part 231 of the conveying member 24 cannot be directly driven to move quickly, that is, the locking mechanism is in a locked state, and the corresponding entire conveying release assembly is in a slow release state where the conveying member 24 can only be driven to move slowly by rotating the rotating handle 12. The number of limiting grooves 31 and limiting members 32 is the same. In this embodiment, two limiting grooves 31 and two limiting members 32 are provided. In other embodiments, one or more limiting grooves 31 and limiting members 32 can be provided. The release member 33 disposed between the rotating member 22 and the conveying member 24 can separate the two and then unlock them, so that the locking mechanism is in an unlocked state. At this time, the rotating member 22 and the conveying member 24 are separated from each other, and the operating portion 231 of the conveying member 24 can be directly driven to move quickly, and the corresponding entire conveying release assembly is in a fast release state that can directly drive the conveying member 24 to move quickly. Of course, the locking mechanism may not be provided in other embodiments.

[0060] The locking mechanism can improve the safety of the conveying release assembly when in use. The unlocking is performed only when the conveying member 24 needs to be moved quickly, thereby preventing accidents caused by accidentally touching the operating part 231 of the conveying member 24 and causing the conveying member 24 to move quickly.

[0061] In some embodiments, the limiting member 32 includes: an extension portion 321 and a clamping portion 322, one end of the extension portion 321 is connected to the conveying member 24, and the extension portion 321 has a guide surface 3211, the guide surface 3211 extends from one end connected to the extension portion 321 to the other end toward the outside of the second installation cavity, the guide surface 3211 abuts against the release member 33, the clamping portion 322 is arranged at the other end of the extension portion 321, and is arranged at an angle to the extension portion 321, and the clamping portion 322 is suitable for clamping to the limiting groove 31.

[0062] Specifically, one end of the extension portion 321 is connected to the conveying member 24, and the other end is provided with a clamping portion 322. The extension portion 321 itself is inclined, that is, the position where the extension portion 321 and the clamping portion 322 are connected is not at the same height as the position where the extension portion 321 and the conveying member 24 are connected, but the position where the extension portion 321 and the clamping portion 322 are connected is closer to the outside, and the position where the extension portion 321 and the conveying member 24 are connected is closer to the inside, such as Figure 4 The end of the extension part 321 or the stopper 32 is in a tilted state. Accordingly, the guide surface 3211 of the extension part 321, that is, its upper surface, is in the same inclination direction as itself. The clamping part 322 is arranged at an angle with the extension part 321 to be clamped with the stopper groove 31.

[0063] In one embodiment, the guide surface 3211 is a curved surface.

[0064] The guide surface 3211 may be an arc surface, and its arc structure has a good guiding effect. When the release member 33 moves along the arc surface toward the side close to the rotating member 22, the extension portion 321 may 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 may also be an inclined plane.

[0066] In some embodiments, the release member 33 includes: an abutment portion 331 and a manual control portion 332 , the abutment portion 331 is disposed on the support body 21 and abuts against the guide surface 3211 , the manual control portion 332 is connected to the abutment portion 331 and is slidably disposed in the first slide groove 1221 .

[0067] The shape of the release member 33 is similar to that of the conveying member 24. Specifically, the abutting portion 331 of the release member 33 is approximately cylindrical in shape and is disposed on the support body 21. It can slide along the support body 21. The inner wall surface of the abutting portion 331 abuts against the guide surface 3211. In this way, a force can be applied to the guide surface 3211 during the movement of the abutting portion 331, thereby playing the role of pressing down the limit member 32. In order to facilitate the control of the movement of the abutting portion 331, a manual control portion 332 is disposed on the abutting portion 331. The manual control portion 332 can be slidably disposed in the first slide groove 1221, or a groove can be separately opened on the rotating section 122, and the manual control portion 332 can be slidably disposed in the separately opened groove.

[0068] In the initial position, the release member 33 is next to the conveying member 24. At this time, the limiting member 32 is engaged with the limiting groove 31, that is, the locking mechanism is in a locked state. During use, if there is a need to quickly drive the conveying member 24, the manual control portion 332 is pushed to move the abutting portion 331 toward 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 an unlocked state.

[0069] In some embodiments, the conveying release assembly also includes a safety mechanism 4, which includes: a safety groove 41 and a safety pin 42. A plurality of protrusions 1223 are arranged at circumferential intervals on the end surface of the rotating section 122 close to the fixed handle 11, and a safety groove 41 is formed between two adjacent protrusions 1223. A second slide groove is opened on the fixed handle 11, and the safety pin 42 is slidably arranged in the second slide groove.

[0070] A step-shaped transition structure is formed at the intersection of the connecting section 121 and the rotating section 122 of the rotating handle 12, where a circle of protrusions 1223 are evenly spaced on the end surface of the rotating section 122, and a safety groove 41 is formed between every two protrusions 1223. When the safety pin 42 is inserted into the safety groove 41, the rotation of the rotating handle 12 can be restricted. That is to say, if the rotating handle 12 is to be rotated, the safety mechanism 4 must first be opened to separate the safety pin 42 from the safety groove 41. The safety mechanism 4 can prevent the rotating handle 12 from being misoperated during non-use processes such as transportation or handling of the delivery release assembly.

[0071] In one embodiment, the safety pin 42 includes: a plug-in block 421 and a manipulation block 422. The manipulation block 422 is slidably disposed on a mounting ring 111 disposed on the inner wall of the fixed handle 11 and is suitable for being plugged into the safety slot 41. The manipulation block 422 is connected to the plug-in block 421 and is located at the second slide slot.

[0072] Specifically, Figure 6As shown, the safety plug 42 includes: a plug block 421 and a manipulation block 422. The shape of the manipulation block 422 is similar to that of the operating portion 231. A mounting ring 111 is provided in the fixed handle 11, that is, in the first mounting cavity. A groove is provided on the mounting ring 111 along its axial direction. The plug block 421 is slidably disposed in the groove. The plug block 421 can be driven to slide in the groove by the manipulation block 422. To facilitate the insertion of the plug block 421 into the safety slot 41, the end of the plug block 421 can be made into a wedge shape to better guide the plug block 421 to cooperate with the safety slot 41.

[0073] According to an embodiment of the present invention, Fig. 9 As shown, on the other hand, a delivery release device is also provided, including the delivery release assembly described in the above embodiment, and also including: a delivery sheath 5 and a guide head 6, the delivery sheath 5 is connected to the delivery member 24, and a part of the delivery sheath 5 is located in the delivery release assembly, and another 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 the length of the delivery release assembly, so part of the delivery sheath 5 is located inside the delivery release assembly and inside the support body 21, and the rest of the delivery sheath 5 is located outside the delivery release assembly and extends from one end of the fixed handle 11. The setting of the guide head 6 facilitates guiding the delivery release device to the lesion.

[0075] In some embodiments, the delivery release device also includes a pullback assembly, which includes: a fixed seat 71, a connecting member 72 and a driving member 73. The fixed seat 71 is arranged at one end of the rotating section 122 away from the connecting section 121. The connecting member 72 is arranged in the delivery sheath 5, and one end is connected to the guide head 6, and the other end is located in the fixed seat 71, and is provided with a driving member 73.

[0076] After the delivery and release of the coated stent 8 is completed, the guide head 6 needs to be withdrawn, so the guide head 6 can be pulled out by the pullback assembly. Specifically, the fixed seat 71 is arranged at the tail of the delivery and release device, that is, the end of the rotating section 122 away from the connecting section 121. The fixed seat 71 is in the middle of the interior, and a third slide groove is opened on it. The diameter of the connecting member 72 is smaller than the delivery sheath 5, and it is arranged in the delivery sheath 5, one end of which is connected to the guide head 6, and the other end is located in the fixed seat 71. A driving member 73 is fixedly provided, and the driving member 73 can slide in the third slide groove. By controlling the driving member 73, the connecting member 72 and the guide head 6 can be gradually pulled out.

[0077] According to an embodiment of the present invention, Fig.10As shown, on the other hand, a delivery and release system is also provided, including the delivery and release device described in the above embodiment and a coated stent 8, wherein the coated stent 8 is disposed in the delivery sheath 5 and is located at one end close to the guide head 6.

[0078] Specifically, Fig.11 As shown, the stent graft 8 includes a frame and a coating, one end of the frame has a pre-release portion, which is not coated, and the rest of the frame is coated. The stent graft 8 is disposed in the delivery sheath 5, and its pre-release portion abuts against the guide head 6.

[0079] The working process of the conveying and releasing system is described as follows:

[0080] The delivery release system is delivered to the lesion through the guiding action of the guide head 6, and then the delivery sheath 5 is driven to move toward the side close to the fixed handle 11 by controlling the delivery release assembly, and the coated stent 8 is gradually released. There are two optional control modes for this process, namely slow release and fast release. Slow release means turning the rotating handle 12 to drive the delivery member 24 to move through the rotating member 22, thereby driving the delivery sheath 5 to move slowly; fast release means directly driving the delivery member 24 to slide quickly by operating the control member 23, thereby driving the delivery sheath 5 to move quickly. Of course, if you want to release quickly, you must first unlock the locking mechanism to separate the rotating member 22 and the delivery member 24.

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

[0082] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A delivery release assembly, characterized in that: include: A handle mechanism (1), the handle mechanism (1) comprising: a fixed handle (11) and a rotating handle (12), the fixed handle (11) having a first mounting cavity inside, the rotating handle (12) having a second mounting cavity inside, the rotating handle (12) comprising a connecting section (121) and a rotating section (122) connected to each other, the connecting section (121) being located in the first mounting cavity and being rotatably connected to the fixed handle (11), the rotating section (122) being provided with a first sliding groove (1221), and the inner wall of which has an internal thread structure (1222); A drive switching mechanism (2), the drive switching mechanism (2) comprising: a support body (21), a rotating member (22), a control member (23) and a conveying member (24), the support body (21) being arranged in the handle mechanism (1), the rotating member (22) and the conveying member (24) being both arranged on the support body (21), the rotating member (22) and the conveying member (24) being both located in the rotating section (122), and the rotating member (22) being located on a side of the conveying member (24) close to the connecting section (121), the rotating member (22) having an external thread structure (221), the external thread structure (221) being threadedly connected to the internal thread structure (1222), the control member (23) being rotatably arranged on the conveying member (24), and its operating portion (231) being located in the first slide groove (1221); The conveying release assembly has a slow release state in which the rotating handle (12) is rotated to drive the rotating member (22) to move axially along the support body (21) and thereby drive the conveying member (24) to move, and a fast release state in which an external force drives the operating part (231) to directly drive the conveying member (24) to move axially along the support body (21).

2. The delivery release assembly according to claim 1, characterized in that: The invention also comprises a locking mechanism, which comprises: a limiting groove (31), a limiting member (32) and a releasing member (33); the limiting groove (31) is formed on the rotating member (22); the limiting member (32) is arranged on the conveying member (24); the releasing member (33) is slidably arranged on the supporting body (21) and is located between the rotating member (22) and the conveying member (24); the locking mechanism has a locking state in which one end of the limiting member (32) away from the conveying member (24) is engaged with the limiting groove (31); and an unlocking state in which the limiting member (32) and the limiting groove (31) are separated by sliding the releasing member (33); when the locking mechanism is in the locking state, the conveying releasing member is in the slow releasing state; when the locking mechanism is in the unlocking state, the conveying releasing member is in the fast releasing state.

3. The delivery release assembly according to claim 2, characterized in that: The limiting member (32) comprises: an extension portion (321) and a clamping portion (322), one end of the extending portion (321) is connected to the conveying member (24), and the extending portion (321) has a guiding surface (3211), the guiding surface (3211) extends from one end connected to the extending portion (321) to the other end toward the outside of the second mounting cavity, the guiding surface (3211) abuts against the releasing member (33), the clamping portion (322) is arranged at the other end of the extending portion (321) and is arranged at an angle to the extending portion (321), and the clamping portion (322) is suitable for clamping to the limiting groove (31).

4. The delivery release assembly according to claim 3, characterized in that: The guide surface (3211) is a curved surface.

5. The delivery release assembly according to claim 3 or 4, characterized in that: The release member (33) comprises: an abutment portion (331) and a manual control portion (332); the abutment portion (331) is arranged on the support body (21) and abuts against the guide surface (3211); the manual control portion (332) is connected to the abutment portion (331) and is slidably arranged in the first sliding groove (1221).

6. The delivery release assembly according to claim 1, characterized in that: The invention also comprises a safety mechanism (4), wherein the safety mechanism (4) comprises: a safety groove (41) and a safety latch (42); a plurality of protrusions (1223) are arranged at intervals along the circumference of the end surface of the rotating section (122) on the side close to the fixed handle (11); the safety groove (41) is formed between two adjacent protrusions (1223); a second sliding groove is provided on the fixed handle (11); and the safety latch (42) is slidably arranged in the second sliding groove.

7. The delivery release assembly according to claim 6, characterized in that: The safety plug (42) comprises: a plug-in block (421) and a manipulation block (422); the manipulation block (422) is slidably disposed on a mounting ring (111) disposed on the inner wall of the fixed handle (11) and is suitable for being plugged into the safety slot (41); the manipulation block (422) is connected to the plug-in block (421) and is located at the second sliding slot.

8. A delivery release device, comprising the delivery release assembly according to any one of claims 1 to 7, characterized in that: Also includes: A delivery sheath tube (5) and a guide head (6), wherein the delivery sheath tube (5) is connected to the delivery member (24), and a portion of the delivery sheath tube (5) is located in the delivery release assembly, and another portion of the delivery sheath tube 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 tube (5) extending out of the delivery release assembly.

9. The delivery and release device according to claim 8, characterized in that: It also includes a pullback component, which includes: a fixed seat (71), a connecting member (72) and a driving member (73), wherein the fixed seat (71) is arranged at one end of the rotating section (122) away from the connecting section (121), the connecting member (72) is arranged in the conveying sheath (5), and one end is connected to the guide head (6), and the other end is located in the fixed seat (71) and is provided with the driving member (73).

10. A delivery and release system, characterized in that: It comprises the delivery release device as described in any one of claims 8 or 9 and a coated stent (8), wherein the coated stent (8) is arranged in the delivery sheath (5) and is located at one end close to the guide head (6).

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